/* ===================================================
   研枢 Nexus Scholar — Light Tool UI
   参考：浅灰底 + 白卡片 + 蓝主色的极简生成工具风
   =================================================== */

:root {
  --bg: #FFFFFF;
  --card: #FFFFFF;
  --card-2: #FAFAFB;
  --line: #EAEAEF;
  --line-2: #DFDFE6;

  --text: #14141A;
  --text-2: #565662;
  --text-3: #9696A3;

  --primary: #17161D;
  --primary-deep: #000000;
  --primary-soft: #F4F3FF;
  --primary-border: #DCD7FF;

  --accent: #6B4EFF;
  --accent-soft: #EFEBFF;

  --orange: #D97B0B;
  --orange-soft: #FFF4E6;
  --mint: #0F8A5F;
  --mint-soft: #E9F8F1;
  --red: #E5484D;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --serif: "Noto Serif SC", "Songti SC", Georgia, serif;

  --r: 12px;
  --r-lg: 18px;
  --r-xl: 24px;
  --rail: 238px;
  --shadow: 0 1px 2px rgba(20, 20, 26, 0.03), 0 18px 44px -28px rgba(20, 20, 26, 0.18);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(84, 125, 251, 0.2); }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.35; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-mark { width: 30px; height: 30px; color: var(--primary); flex: none; }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text b { font-size: 15px; font-weight: 600; letter-spacing: 0.12em; }
.brand-text i {
  font-style: normal;
  font-size: 8px;
  letter-spacing: 0.22em;
  color: var(--text-3);
  margin-top: 3px;
  font-weight: 500;
}

.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--text-2); }
.nav-links a:not(.nav-cta):hover { color: var(--text); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #5F87FF, var(--primary-deep));
  color: #fff;
  border: 0;
  border-radius: 10px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  box-shadow: 0 6px 16px -6px rgba(84, 125, 251, 0.55);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 22px -8px rgba(84, 125, 251, 0.65); }
.btn-primary svg { width: 14px; }

.btn-sm { height: 36px; padding: 0 18px; font-size: 13.5px; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-2);
  background: #fff;
  color: var(--text-2);
  border-radius: 10px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.btn-ghost:hover { border-color: #C6C9D4; color: var(--text); }

.nav-toggle {
  display: none;
  width: 38px; height: 38px;
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4.5px;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 14px; height: 1.5px; background: var(--text); transition: all 0.3s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

/* ---------- studio layout ---------- */
.studio { padding: 52px 0 72px; }

.studio-grid {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

/* ---------- sidebar ---------- */
.sidebar {
  position: sticky;
  top: 80px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.side-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 11px;
  background: none;
  cursor: pointer;
  text-align: left;
  transition: background 0.25s var(--ease);
  flex: none;
}

.side-item:hover { background: #F5F6FA; }

.side-item.active { background: var(--primary-soft); }

.s-ico {
  width: 32px; height: 32px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  color: #fff;
  flex: none;
  box-shadow: 0 3px 8px -3px rgba(30, 35, 50, 0.35);
}

.s-ico svg { width: 18px; height: 18px; }

.ic-blue   { background: linear-gradient(135deg, #6C95FF, #4174FF); }
.ic-blue2  { background: linear-gradient(135deg, #55A8F5, #2F7FE0); }
.ic-purple { background: linear-gradient(135deg, #A18CFF, #7E63F2); }
.ic-cyan   { background: linear-gradient(135deg, #4FC6E8, #2BA8D4); }
.ic-teal   { background: linear-gradient(135deg, #3FD0BC, #1FAE97); }
.ic-green  { background: linear-gradient(135deg, #55D288, #2FAE62); }
.ic-orange { background: linear-gradient(135deg, #FFB84D, #F09200); }
.ic-pink   { background: linear-gradient(135deg, #F584B7, #E85D9B); }

.s-name {
  flex: 1;
  font-size: 13.5px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.side-item.active .s-name { color: var(--primary-deep); font-weight: 600; }

.s-badge {
  font-size: 10px;
  font-weight: 600;
  color: #D97B00;
  background: var(--orange-soft);
  border: 1px solid #F6DCA9;
  border-radius: 6px;
  padding: 1px 5px;
  flex: none;
}

.hero-mini {
  text-align: center;
  margin-bottom: 42px;
  position: relative;
  padding: 14px 0 4px;
}

/* 顶部柔和光晕，营造纵深感 */
.hero-mini::before {
  content: '';
  position: absolute;
  top: -34px;
  bottom: -26px;
  left: 0;
  right: 0;
  background:
    radial-gradient(560px 200px at 50% 12%, rgba(84, 125, 251, 0.11), transparent 70%),
    radial-gradient(340px 150px at 74% 6%, rgba(126, 99, 242, 0.08), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

/* 引擎徽标胶囊 */
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  box-shadow: 0 2px 12px -4px rgba(30, 35, 50, 0.14), inset 0 1px 0 #fff;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-2);
  backdrop-filter: blur(6px);
}

.hk-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4174FF, #7E63F2);
  box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.16);
  animation: hkPulse 2.4s ease-in-out infinite;
}

@keyframes hkPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.16); }
  50% { box-shadow: 0 0 0 5px rgba(84, 125, 251, 0.07); }
}

.hero-mini h1 {
  font-size: clamp(1.75rem, 4.4vw, 2.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.em {
  background: linear-gradient(94deg, #4174FF 8%, #7E63F2 62%, #2BA8D4 112%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--serif);
  font-weight: 700;
  padding: 0 0.05em;
  filter: drop-shadow(0 1px 6px rgba(84, 125, 251, 0.18));
}

.hero-sub {
  margin: 16px auto 0;
  max-width: 560px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- panel / form ---------- */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 36px 40px 30px;
}

.prow { margin-bottom: 26px; }

.plabel {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 10px;
}

.plabel .req { color: var(--red); font-style: normal; }
.opt-hint { font-size: 12px; color: var(--text-3); font-weight: 400; }
.fmt-hint { font-size: 12px; color: var(--text-3); margin-top: 8px; }

.ptitle, .ptextarea, .pinput {
  width: 100%;
  background: var(--card-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  padding: 13px 15px;
  font-size: 14.5px;
  color: var(--text);
  outline: none;
  transition: all 0.25s var(--ease);
  resize: vertical;
}

.ptitle { line-height: 1.6; min-height: 72px; }

.ptitle::placeholder, .ptextarea::placeholder { color: #B3B7C0; }

.ptitle:focus, .ptextarea:focus, .pinput:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.13);
}

.ptitle.invalid { border-color: var(--red); animation: shake 0.4s var(--ease); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.pinput { height: 44px; padding: 0 13px; font-size: 14px; }

.perr {
  margin-top: 9px;
  font-size: 12.5px;
  color: var(--red);
}

/* suggest */
.linklike {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 0;
  color: var(--primary-deep);
  font-size: 13px;
  cursor: pointer;
  padding: 0;
}
.linklike svg { width: 14px; }
.linklike:hover { text-decoration: underline; }

.suggest-row { margin-top: 10px; }

.suggest-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  padding: 12px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: var(--r);
  animation: fadeUp 0.35s var(--ease);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.suggest-list .sug {
  border: 1px solid var(--primary-border);
  background: #fff;
  color: var(--text-2);
  font-size: 12.5px;
  border-radius: 8px;
  padding: 6px 11px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  text-align: left;
}
.suggest-list .sug:hover { border-color: var(--primary); color: var(--primary-deep); }

/* seg pills */
.seg { display: flex; flex-wrap: wrap; gap: 8px; }

.seg-item {
  height: 38px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid var(--line-2);
  background: #fff;
  color: var(--text-2);
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.seg-item:hover { border-color: #C3C7D4; color: var(--text); }

.seg-item.active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary-deep);
  font-weight: 500;
}

.seg-grid .seg-item { flex: 1 1 calc(25% - 8px); min-width: 130px; }
.seg-sm .seg-item { height: 36px; padding: 0 14px; font-size: 13px; }

/* mode cards */
.mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.mode-card {
  position: relative;
  text-align: left;
  border: 1.5px solid var(--line-2);
  background: #fff;
  border-radius: 14px;
  padding: 16px 18px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.25s var(--ease);
}

.mode-card:hover { border-color: #C3C7D4; }

.mode-card.active {
  border-color: var(--primary);
  background: linear-gradient(180deg, #FBFCFF, var(--primary-soft));
  box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.1);
}

.mode-name { font-size: 14.5px; font-weight: 600; color: var(--text); }
.mode-desc { font-size: 12.5px; color: var(--text-2); line-height: 1.6; }
.mode-speed { font-size: 11.5px; color: var(--text-3); margin-top: 3px; }

.mode-badge {
  position: absolute;
  top: -9px; right: 12px;
  font-size: 10.5px;
  color: #B26B00;
  background: var(--orange-soft);
  border: 1px solid #F5D9A8;
  border-radius: 100px;
  padding: 1.5px 9px;
  font-weight: 500;
}

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  height: 32px;
  padding: 0 13px;
  border-radius: 100px;
  border: 1px solid var(--line-2);
  background: #fff;
  color: var(--text-2);
  font-size: 12.5px;
  cursor: pointer;
  transition: all 0.22s var(--ease);
  white-space: nowrap;
}

.chip:hover { border-color: #C3C7D4; color: var(--text); }

.chip.on {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-weight: 500;
}

/* dropzone */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 26px 18px;
  border: 1.5px dashed var(--line-2);
  border-radius: var(--r);
  background: var(--card-2);
  cursor: pointer;
  text-align: center;
  transition: all 0.3s var(--ease);
}

.dropzone:hover, .dropzone.drag {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.dropzone svg { width: 24px; color: var(--primary); margin-bottom: 3px; }

.dropzone-sm { padding: 18px 16px; }
.dropzone-sm svg { width: 22px; }
.dropzone b { font-size: 13px; font-weight: 500; color: var(--text); }
.dropzone span { font-size: 11.5px; color: var(--text-3); }

.file-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.file-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-2);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 5px 10px;
  max-width: 100%;
}

.file-item i {
  font-style: normal;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--primary-deep);
  background: var(--primary-soft);
  border-radius: 4px;
  padding: 1px 5px;
  flex: none;
}

.file-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 180px; }

/* advanced */
.advanced {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card-2);
  margin-bottom: 26px;
  overflow: hidden;
}

.advanced summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 18px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-2);
  user-select: none;
}

.advanced summary::-webkit-details-marker { display: none; }

.advanced summary svg { width: 14px; transition: transform 0.3s var(--ease); color: var(--text-3); }
.advanced[open] summary svg { transform: rotate(180deg); }

.advanced summary em { font-style: normal; font-weight: 400; font-size: 12px; color: var(--text-3); }

.adv-body { padding: 4px 18px 20px; border-top: 1px solid var(--line); }
.adv-body .prow { margin-top: 18px; }
.adv-body .prow:first-child { margin-top: 16px; }

.prows-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.prange {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: var(--line-2);
  outline: none;
  margin: 18px 0 4px;
  cursor: pointer;
}

.prange::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--primary);
  box-shadow: 0 1px 6px rgba(30, 35, 50, 0.25);
  cursor: pointer;
}

.prange::-moz-range-thumb {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--primary);
}

.plabel .val { margin-left: auto; color: var(--primary-deep); font-weight: 500; font-size: 12.5px; }

/* agree */
.agree {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
  cursor: pointer;
  margin-bottom: 6px;
}

.agree input { display: none; }

.agree .box {
  width: 16px; height: 16px;
  border-radius: 5px;
  border: 1px solid var(--line-2);
  background: #fff;
  flex: none;
  margin-top: 2px;
  position: relative;
  transition: all 0.25s var(--ease);
}

.agree input:checked + .box { background: var(--primary); border-color: var(--primary); }
.agree input:checked + .box::after {
  content: "";
  position: absolute;
  left: 4.5px; top: 1px;
  width: 4px; height: 8px;
  border: solid #fff;
  border-width: 0 1.8px 1.8px 0;
  transform: rotate(42deg);
}

.agree.err .box { border-color: var(--red); animation: shake 0.4s var(--ease); }

/* 手机号登录弹窗内的同意勾选 */
.auth-agree {
  margin: 14px 0 6px;
  font-size: 12px;
  line-height: 1.7;
}
.auth-agree a { color: var(--primary); text-decoration: none; border-bottom: 1px solid currentColor; }
.auth-agree a:hover { opacity: 0.8; }
.auth-agree + .perr { margin: 0 0 10px; }

/* submit */
.submit {
  width: 100%;
  height: 52px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #5F87FF, var(--primary-deep));
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition: all 0.3s var(--ease);
  box-shadow: 0 10px 24px -8px rgba(84, 125, 251, 0.6);
}

.submit svg { width: 16px; transition: transform 0.3s var(--ease); }
.submit:hover { transform: translateY(-1px); box-shadow: 0 14px 30px -10px rgba(84, 125, 251, 0.7); }
.submit:hover svg { transform: translateX(3px); }
.submit:active { transform: none; }

.under-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
  margin-top: 14px;
}

/* ---------- features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 760px;
  margin: 44px auto 0;
}

.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px 20px;
  transition: all 0.3s var(--ease);
}

.feature:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.f-ico {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary-deep);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}

.f-ico svg { width: 19px; }

.feature h3 { font-size: 14.5px; margin-bottom: 6px; }
.feature p { font-size: 12.5px; color: var(--text-2); line-height: 1.75; }

/* steps strip */
.steps {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 0;
  margin: 36px auto 0;
  max-width: 760px;
  color: var(--text-2);
  font-size: 13px;
}

.steps li { display: flex; align-items: center; gap: 9px; flex: 1; justify-content: center; position: relative; }

.steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -50%;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line-2) 0 5px, transparent 5px 10px);
  z-index: -1;
}

.steps b {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 11.5px;
  font-weight: 600;
  display: grid;
  place-items: center;
  flex: none;
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer p { font-size: 12px; color: var(--text-3); }

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* ---------- overlay ---------- */
.overlay { position: fixed; inset: 0; z-index: 300; display: grid; place-items: center; padding: 24px; }
.overlay-scrim {
  position: absolute;
  inset: 0;
  background: rgba(43, 47, 54, 0.45);
  backdrop-filter: blur(6px);
  animation: fadeIn 0.35s var(--ease);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.overlay-panel {
  position: relative;
  width: 100%;
  max-width: 700px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--card);
  border-radius: 20px;
  padding: 38px 40px 32px;
  box-shadow: 0 40px 100px -30px rgba(30, 35, 50, 0.45);
  animation: panelIn 0.5s var(--ease);
  scrollbar-width: thin;
}

.overlay-panel::-webkit-scrollbar { width: 8px; }
.overlay-panel::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 8px; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(20px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

.overlay-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-3);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.25s;
  z-index: 2;
}
.overlay-close:hover { color: var(--text); border-color: var(--line-2); }

/* generating */
.gen-kicker { font-size: 11px; letter-spacing: 0.2em; color: var(--primary-deep); font-weight: 600; margin-bottom: 12px; }
.gen-title { font-size: 21px; margin-bottom: 26px; }

.gen-steps { list-style: none; display: grid; gap: 13px; margin-bottom: 26px; }

.gen-steps li {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 13.5px;
  color: var(--text-3);
  transition: color 0.4s;
}

.gen-steps li i {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 1.5px solid var(--line-2);
  flex: none;
  position: relative;
  transition: all 0.4s var(--ease);
}

.gen-steps li.active { color: var(--text); }
.gen-steps li.active i { border-color: var(--primary); border-top-color: transparent; animation: spin 0.9s linear infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

.gen-steps li.done { color: var(--text-2); }
.gen-steps li.done i { border-color: var(--mint); background: var(--mint-soft); }
.gen-steps li.done i::after {
  content: "";
  position: absolute;
  left: 4.5px; top: 2px;
  width: 4px; height: 7.5px;
  border: solid var(--mint);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(42deg);
}

.gen-track { height: 4px; background: var(--line); border-radius: 4px; overflow: hidden; }
.gen-track span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: linear-gradient(90deg, #5F87FF, var(--primary-deep));
  transition: width 0.6s linear;
}

/* result */
.result-head { margin-bottom: 26px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.result-kicker { font-size: 11px; letter-spacing: 0.18em; color: var(--primary-deep); font-weight: 600; margin-bottom: 10px; }
.result-head h3 { font-size: 20px; line-height: 1.45; margin-bottom: 8px; }
.result-sub { font-size: 12.5px; color: var(--text-3); }

.result-block { margin-bottom: 24px; }
.result-block h4 {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 12px;
  font-weight: 600;
}
.result-block > p { font-size: 13.5px; color: var(--text-2); line-height: 1.9; }

.route-list { display: grid; gap: 9px; }

.route {
  display: flex;
  gap: 11px;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 13px 15px;
  background: var(--card-2);
  animation: fadeUp 0.5s var(--ease) backwards;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.route:hover { border-color: #C9D4F5; background: #fff; }
.route.sel {
  border-color: var(--primary);
  background: #F7F9FF;
  box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.10);
}

.route-pick {
  position: relative;
  flex: none;
  width: 16px; height: 16px;
  margin-top: 2px;
  border: 1.5px solid var(--line-2);
  border-radius: 50%;
  background: #fff;
  transition: border-color 0.18s var(--ease);
}
.route.sel .route-pick { border-color: var(--primary); }
.route.sel .route-pick::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--primary);
}

.route-main { display: block; flex: 1; min-width: 0; }
.route-body { display: block; font-size: 12.5px; color: var(--text-2); line-height: 1.7; }
.route-why { display: block; margin-top: 5px; font-size: 11.5px; color: var(--text-3); line-height: 1.6; }

.routes-hint {
  font-size: 12px !important;
  color: var(--text-3) !important;
  line-height: 1.7 !important;
  margin: -3px 0 11px;
}

/* STEP 1 · 技术路线选择页（生成目录前置） */
.routes-stage { animation: fadeIn 0.4s var(--ease); }
.routes-stage .gen-title { margin-bottom: 14px; }

.stage-desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.85;
  margin-bottom: 14px;
}

.stage-notice {
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-2);
  background: var(--orange-soft, #FFF6EC);
  border: 1px solid rgba(232, 146, 46, 0.22);
  border-left: 3px solid var(--orange, #E8922E);
  border-radius: 10px;
  padding: 11px 14px;
  margin-bottom: 18px;
}
.stage-notice b { color: var(--text); font-weight: 600; }

.stage-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.stage-hint { font-size: 12px; color: var(--text-3); }

.routes-stage .perr { margin-top: 10px; }

/* 模型给出的专业归属判断 */
.stage-basis {
  font-size: 12px;
  line-height: 1.75;
  color: var(--text-2);
  background: var(--primary-soft);
  border-radius: 9px;
  padding: 9px 12px;
  margin: 0 0 12px;
}

/* 结果页的技术路线为只读展示 */
.route-list.ro .route { cursor: default; }
.route-list.ro .route:hover { border-color: var(--line); background: var(--card-2); }
.route-list.ro .route.sel:hover { border-color: var(--primary); background: #F7F9FF; }

.routes-note {
  font-size: 11.5px !important;
  color: var(--text-3) !important;
  line-height: 1.75 !important;
  margin: 10px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--line-2);
}

.routes-foot {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.routes-picked { font-size: 11.5px; color: var(--primary-deep); }
.routes-foot .link-copy { font-size: 12px; margin-left: auto; }

.route-top { display: flex; align-items: center; gap: 9px; margin-bottom: 5px; }

.route-tag {
  font-size: 10.5px;
  padding: 1.5px 8px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-weight: 600;
  flex: none;
}
.route-tag.alt { background: var(--mint-soft); color: var(--mint); }
.route-tag.safe { background: #F0F0F4; color: var(--text-3); }

.route-top b { font-size: 13.5px; font-weight: 600; }
.route p { font-size: 12.5px; color: var(--text-2); line-height: 1.7; }

.chapter-list { display: grid; gap: 10px; }

.ch { display: grid; grid-template-columns: 28px 1fr 44px; gap: 10px; align-items: center; font-size: 13px; }
.ch-num { font-size: 11px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.ch-name { color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ch-pct { font-size: 11px; color: var(--text-3); text-align: right; font-variant-numeric: tabular-nums; }

.ch-bar { grid-column: 2 / 3; height: 3px; background: var(--line); border-radius: 3px; overflow: hidden; margin-top: -3px; }
.ch-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #5F87FF, var(--primary-deep));
  border-radius: 3px;
  transition: width 1s var(--ease);
}

.timeline { display: grid; }

.tl {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}
.tl:last-child { border-bottom: 0; }
.tl-d { color: var(--primary-deep); font-variant-numeric: tabular-nums; font-size: 12px; }
.tl-t { color: var(--text-2); }

.risk-list { list-style: none; display: grid; gap: 8px; }
.risk-list li {
  display: flex;
  gap: 9px;
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.7;
}
.risk-list li::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--orange);
  flex: none;
  margin-top: 8px;
}

.result-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.btn-copy { height: 42px; padding: 0 22px; font-size: 13.5px; }
.copy-tip { font-size: 12px; color: var(--mint); margin-left: auto; opacity: 0; transition: opacity 0.3s; }
.copy-tip.show { opacity: 1; }

/* ===================================================
   RESPONSIVE
   =================================================== */

@media (max-width: 920px) {
  .studio-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }

  .sidebar {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding: 8px;
    gap: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .sidebar::-webkit-scrollbar { display: none; }
  .side-item { width: auto; flex: none; padding: 6px 12px 6px 7px; }
  .s-name { font-size: 13px; }
}

@media (max-width: 720px) {
  .wrap { padding: 0 18px; }
  .nav-inner { height: 58px; }
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 58px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 18px 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px -20px rgba(30,35,50,.2);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s var(--ease);
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
  .nav-links a:last-child { border-bottom: 0; margin-top: 10px; height: 44px; }

  .studio { padding: 34px 0 56px; }
  .hero-mini { margin-bottom: 26px; padding: 8px 0 2px; }
  .hero-mini p { font-size: 13.5px; padding: 0 6px; }
  .hero-kicker { font-size: 10.5px; padding: 5px 13px; margin-bottom: 13px; }

  .panel { padding: 26px 20px 24px; border-radius: 16px; }
  .prow { margin-bottom: 22px; }

  .seg-grid .seg-item { flex: 1 1 calc(50% - 8px); min-width: 0; }
  .mode-cards { grid-template-columns: 1fr; }
  .prows-2 { grid-template-columns: 1fr; gap: 0; }
  .prows-2 .pcell { margin-bottom: 18px; }

  .features { grid-template-columns: 1fr; margin-top: 32px; }
  .steps { flex-direction: column; align-items: flex-start; gap: 14px; margin-top: 28px; }
  .steps li { flex: none; }
  .steps li:not(:last-child)::after {
    right: auto;
    left: 10px;
    top: calc(100% + 1px);
    width: 1px;
    height: 12px;
    background: var(--line-2);
    transform: none;
  }

  .overlay { padding: 0; place-items: end stretch; }
  .overlay-panel {
    max-width: 100%;
    max-height: 92vh;
    border-radius: 20px 20px 0 0;
    padding: 30px 20px 26px;
    animation: sheetIn 0.45s var(--ease);
  }
  @keyframes sheetIn {
    from { transform: translateY(60px); opacity: 0; }
    to { transform: none; opacity: 1; }
  }

  .result-actions .btn-copy { flex: 1; }
  .copy-tip { flex-basis: 100%; margin-left: 0; text-align: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 400px) {
  .seg-item { padding: 0 12px; font-size: 13px; }
  .hero-mini h1 { font-size: 1.55rem; }
}

@media (hover: none) {
  .submit:hover, .feature:hover { transform: none; }
}

/* ============================================
   DeepSeek 实时生成面板 / 模型状态 / Key 配置
   ============================================ */

/* 模型状态条 */
.model-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-3);
}
.m-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #C7CAD3;
  flex: none;
  transition: background 0.3s;
}
.m-dot.checking { background: #F0A020; animation: dotPulse 1.2s ease-in-out infinite; }
.m-dot.ready { background: #22B07D; box-shadow: 0 0 0 3px rgba(34, 176, 125, 0.14); }
.m-dot.nokey, .m-dot.offline { background: #E08A2E; box-shadow: 0 0 0 3px rgba(224, 138, 46, 0.13); }

@keyframes dotPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.m-link {
  border: 0;
  background: none;
  padding: 0;
  font-size: 12px;
  color: var(--primary-deep);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.m-link:hover { opacity: 0.75; }

/* 生成面板内的实时输出 */
.live {
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card-2);
  overflow: hidden;
  animation: fadeIn 0.4s var(--ease);
}

.live-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.live-head b { font-size: 12px; font-weight: 600; color: var(--text-2); }
.live-meta {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.14);
  animation: dotPulse 1.3s ease-in-out infinite;
  flex: none;
}
.live.fallback .live-dot { background: #E08A2E; box-shadow: 0 0 0 3px rgba(224, 138, 46, 0.14); }
.live.done .live-dot { animation: none; background: #22B07D; box-shadow: 0 0 0 3px rgba(34, 176, 125, 0.14); }

.live-body {
  margin: 0;
  padding: 14px 16px;
  min-height: 132px;
  max-height: 210px;
  overflow-y: auto;
  font-family: "SF Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.85;
  color: #3A3F4B;
  white-space: pre-wrap;
  word-break: break-word;
  scrollbar-width: thin;
}
.live-body::-webkit-scrollbar { width: 6px; }
.live-body::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 6px; }
.live-body::after {
  content: "▍";
  color: var(--primary);
  animation: caret 1s steps(2) infinite;
  margin-left: 1px;
}
.live.done .live-body::after { content: none; }
@keyframes caret { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.live-note {
  margin: 0;
  padding: 9px 16px 11px;
  border-top: 1px dashed var(--line);
  font-size: 11.5px;
  line-height: 1.65;
  color: #A2661B;
  background: #FFFBF4;
}

/* 结果来源标记 */
.ai-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 5px;
  background: rgba(84, 125, 251, 0.09);
  color: var(--primary-deep);
  font-size: 10px;
  letter-spacing: 0.04em;
  font-weight: 600;
  vertical-align: 2px;
  text-transform: none;
}
.ai-tag.local { background: #F2F2F6; color: var(--text-3); }

/* AI 生成内容显式标识（《人工智能生成合成内容标识办法》要求） */
.ai-notice {
  margin: 10px 0 14px;
  padding: 9px 12px;
  border-radius: 8px;
  background: #F4F6FF;
  border-left: 3px solid var(--primary);
  color: #4A5468;
  font-size: 12px;
  line-height: 1.7;
}

/* Key 配置弹窗 */
.key-modal { position: fixed; inset: 0; z-index: 400; display: grid; place-items: center; padding: 20px; }
.key-scrim { position: absolute; inset: 0; background: rgba(43, 47, 54, 0.42); backdrop-filter: blur(5px); animation: fadeIn 0.3s var(--ease); }
.key-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 18px;
  padding: 30px 30px 24px;
  box-shadow: 0 34px 80px -26px rgba(30, 35, 50, 0.4);
  animation: panelIn 0.4s var(--ease);
}
.key-x {
  position: absolute;
  top: 14px; right: 14px;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-3);
  font-size: 11px;
  cursor: pointer;
}
.key-x:hover { color: var(--text); }
.key-kicker { font-size: 10.5px; letter-spacing: 0.2em; color: var(--primary-deep); font-weight: 600; margin-bottom: 8px; }
.key-card h3 { font-size: 19px; margin-bottom: 10px; }
.key-desc { font-size: 12.5px; line-height: 1.75; color: var(--text-2); margin-bottom: 20px; }
.key-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 7px; }
.key-input {
  width: 100%;
  height: 42px;
  padding: 0 13px;
  border-radius: 10px;
  border: 1px solid var(--line-2);
  background: var(--card-2);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: all 0.2s;
}
.key-input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(84, 125, 251, 0.1); }
.key-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 10px; }
.key-link { font-size: 11.5px; color: var(--primary-deep); text-decoration: none; }
.key-link:hover { text-decoration: underline; }
.key-tip { font-size: 11.5px; color: var(--text-3); }
.key-tip.ok { color: #1F9D6F; }
.key-tip.err { color: #D0603A; }
.key-actions { display: flex; gap: 10px; margin-top: 20px; }
.key-btn {
  flex: 1;
  height: 42px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.22s;
  font-family: inherit;
}
.key-btn.ghost { border: 1px solid var(--line-2); background: #fff; color: var(--text-2); }
.key-btn.ghost:hover { border-color: #C6C9D4; color: var(--text); }
.key-btn.solid { border: 0; color: #fff; background: linear-gradient(180deg, #6B8DFF, var(--primary-deep)); box-shadow: 0 8px 18px -8px rgba(84, 125, 251, 0.6); }
.key-btn.solid:hover { transform: translateY(-1px); }
.key-note { margin-top: 16px; font-size: 11px; line-height: 1.7; color: var(--text-3); }
.key-note code { padding: 1px 5px; border-radius: 4px; background: var(--card-2); border: 1px solid var(--line); font-size: 10.5px; }

@media (max-width: 560px) {
  .live-body { max-height: 168px; font-size: 12px; }
  .key-card { padding: 26px 20px 20px; border-radius: 18px 18px 0 0; align-self: end; max-width: 100%; }
  .key-modal { padding: 0; align-items: end; }
}

/* 结果页：离线/失败原因提示 */
.result-warn {
  margin-top: 10px;
  padding: 8px 11px;
  border-radius: 8px;
  background: #FFFBF2;
  border: 1px solid #F4E3C4;
  font-size: 12px;
  line-height: 1.65;
  color: #9A6214;
}

/* ============================================
   三级目录（章 / 节 / 小节）+ 前置后置条目
   ============================================ */
.chapter-list { gap: 3px; }

.ch-lv1 {
  margin-top: 11px;
  padding-top: 9px;
  border-top: 1px solid var(--line);
}
.ch-lv1:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.ch-lv1 .ch-name { color: var(--text); font-weight: 500; }

.ch-lv2 {
  grid-template-columns: 42px 1fr;
  padding-left: 22px;
}
.ch-lv3 {
  grid-template-columns: 50px 1fr;
  padding-left: 44px;
}
.ch-idx {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 11px;
  color: #AEB3C0;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.ch-lv2 .ch-name { font-size: 12.5px; color: var(--text-2); white-space: normal; line-height: 1.55; }
.ch-lv3 .ch-name { font-size: 12px; color: var(--text-3); white-space: normal; line-height: 1.55; }

.ch-lv0 { grid-template-columns: 40px 1fr; align-items: center; }
.ch-lv0 .ch-name { font-size: 12.5px; color: var(--text-2); }
.ch-tag {
  justify-self: start;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--line-2);
  background: var(--card-2);
  color: var(--text-3);
  font-size: 10px;
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.ch-tag.front {
  color: var(--primary-deep);
  background: rgba(84, 125, 251, 0.07);
  border-color: rgba(84, 125, 251, 0.18);
}

/* 小节展开/收起 */
.chapters-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.sub-toggle {
  border: 0;
  background: none;
  padding: 2px 0;
  font-size: 12px;
  color: var(--primary-deep);
  cursor: pointer;
  white-space: nowrap;
}
.sub-toggle:hover { text-decoration: underline; text-underline-offset: 2px; }

.ch-list.collapsed .ch-lv3 { display: none; }

/* ============================================
   结果页操作区（返回修改 / 开始生成论文 / 复制）
   ============================================ */
.result-actions { gap: 12px; }

.btn-pay { display: inline-flex; align-items: center; gap: 9px; padding-right: 14px; white-space: nowrap; }
.pay-price {
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.19);
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.link-copy {
  margin-left: auto;
  border: 0;
  background: none;
  padding: 6px 2px;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-3);
  cursor: pointer;
  transition: color 0.2s;
}
.link-copy:hover { color: var(--primary-deep); }

/* ============================================
   支付收银台
   ============================================ */
.pay-modal { position: fixed; inset: 0; z-index: 420; display: grid; place-items: center; padding: 24px; }
.pay-scrim {
  position: absolute; inset: 0;
  background: rgba(38, 42, 52, 0.46);
  backdrop-filter: blur(6px);
  animation: fadeIn 0.28s var(--ease);
}
.pay-card {
  position: relative;
  width: 100%;
  max-width: 760px;
  background: #fff;
  border-radius: 20px;
  padding: 30px 32px 22px;
  box-shadow: 0 40px 90px -30px rgba(28, 33, 48, 0.45);
  animation: panelIn 0.42s var(--ease);
}
.pay-x {
  position: absolute; top: 14px; right: 14px;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-3);
  font-size: 11px;
  cursor: pointer;
}
.pay-x:hover { color: var(--text); }

.pay-kicker { font-size: 10.5px; letter-spacing: 0.2em; font-weight: 600; color: var(--primary-deep); margin-bottom: 7px; }
.pay-top h3 { font-size: 20px; letter-spacing: -0.01em; }
.pay-sub { margin-top: 7px; font-size: 12px; color: var(--text-3); display: flex; align-items: center; gap: 8px; }
.pay-sub b { color: var(--text-2); font-weight: 500; font-variant-numeric: tabular-nums; }
.pay-mode {
  padding: 1px 7px;
  border-radius: 5px;
  background: var(--orange-soft);
  color: #A2661B;
  font-size: 10.5px;
  font-weight: 500;
}
.pay-mode.live { background: var(--mint-soft); color: #1F8A63; }

.pay-grid {
  display: grid;
  grid-template-columns: 258px 1fr;
  gap: 28px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

/* 左：扫码 */
.pay-tabs {
  display: flex;
  gap: 4px;
  padding: 3px;
  border-radius: 9px;
  background: var(--card-2);
  border: 1px solid var(--line);
}
.pay-tab {
  flex: 1;
  height: 30px;
  border: 0;
  border-radius: 7px;
  background: none;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.2s;
}
.pay-tab.active { background: #fff; color: var(--text); box-shadow: 0 1px 3px rgba(30, 35, 50, 0.10); font-weight: 500; }

.qr-frame {
  position: relative;
  margin: 14px 0 0;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card-2);
  display: grid;
  place-items: center;
  aspect-ratio: 1;
}
.qr-box { width: 100%; display: grid; place-items: center; }
.qr-box svg, .qr-box img { width: 100%; height: auto; display: block; border-radius: 4px; }
.qr-box .qr-fallback {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-3);
  text-align: center;
  padding: 0 14px;
}
.qr-done {
  position: absolute; inset: 12px;
  display: grid;
  place-items: center;
  gap: 6px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(2px);
  animation: fadeIn 0.3s var(--ease);
}
.qr-done i {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--mint-soft);
  color: #1F8A63;
  font-size: 24px;
  font-style: normal;
}
.qr-done span { font-size: 13px; color: #1F8A63; font-weight: 500; }

/* 电脑网站支付：跳转支付宝收银台 */
.qr-jump {
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 0 10px;
  text-align: center;
}
.qr-jump[hidden] { display: none; }
.qj-ico {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  border-radius: 15px;
  background: #1677FF;
  color: #fff;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0;
  box-shadow: 0 8px 20px rgba(22, 119, 255, 0.24);
}
.qj-t { margin: 2px 0 0; font-size: 14px; font-weight: 600; color: var(--text-1); }
.qj-s { margin: 0; font-size: 11.5px; line-height: 1.6; color: var(--text-3); }
.qj-btn {
  margin-top: 4px;
  padding: 9px 20px;
  border: 0;
  border-radius: 9px;
  background: #1677FF;
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.18s var(--ease);
}
.qj-btn:hover { background: #0E6AE0; }

/* 轻量提示条 */
.ns-toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  z-index: 9999;
  max-width: min(520px, calc(100vw - 32px));
  padding: 12px 20px;
  border-radius: 11px;
  background: #16181D;
  color: #fff;
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.22);
  opacity: 0;
  transform: translate(-50%, 14px);
  pointer-events: none;
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
}
.ns-toast.show { opacity: 1; transform: translate(-50%, 0); }
.ns-toast.ok { background: #0F7A5A; }

.qr-hint { margin-top: 11px; font-size: 12.5px; color: var(--text-2); text-align: center; }
.qr-count { margin-top: 4px; font-size: 11.5px; color: var(--text-3); text-align: center; font-variant-numeric: tabular-nums; }

/* 右：订单 */
.pay-side { display: flex; flex-direction: column; gap: 10px; padding-top: 2px; }
.pay-row { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; font-size: 12.5px; }
.pay-row > span { color: var(--text-3); flex: none; }
.pay-row > b {
  color: var(--text);
  font-weight: 500;
  max-width: 78%;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pay-total {
  margin-top: 6px;
  padding: 13px 14px;
  border-radius: 12px;
  background: var(--card-2);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pay-total-l { display: flex; align-items: center; gap: 9px; }
.pay-list { font-size: 12px; color: var(--text-3); }
.pay-list s { text-decoration-thickness: 1px; }
.pay-off {
  padding: 1px 6px;
  border-radius: 4px;
  background: #FFF0E6;
  color: #D2601A;
  font-size: 10.5px;
  font-weight: 600;
}
.pay-amount { font-size: 24px; font-weight: 600; color: var(--text); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }

.pay-includes { list-style: none; margin-top: 4px; display: grid; gap: 5px; }
.pay-includes li {
  position: relative;
  padding-left: 15px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-2);
}
.pay-includes li::before {
  content: "✓";
  position: absolute; left: 0;
  color: var(--primary);
  font-size: 11px;
}

.pay-status {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 7px;
}
.pay-status::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #E0A03A;
  animation: dotPulse 1.3s ease-in-out infinite;
}
.pay-status.paid { color: #1F8A63; }
.pay-status.paid::before { background: var(--mint); animation: none; }
.pay-err { margin-top: 6px; font-size: 11.5px; color: #C0503B; line-height: 1.6; }

.pay-foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.pay-safe { font-size: 11.5px; color: var(--text-3); }
.pay-claim {
  height: 34px;
  padding: 0 16px;
  border-radius: 9px;
  border: 1px solid var(--primary-border);
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-family: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: all 0.2s;
}
.pay-claim:hover { background: #E5EBFF; }
.pay-claim:disabled { opacity: 0.55; cursor: default; }

.pay-note {
  margin-top: 12px;
  padding: 9px 12px;
  border-radius: 9px;
  background: #FFFBF4;
  border: 1px solid #F4E3C4;
  font-size: 11.5px;
  line-height: 1.7;
  color: #96621C;
}

/* ============================================
   论文正文生成
   ============================================ */
.paper-panel { max-width: 1060px; }
.paper-head { margin-bottom: 18px; }
.paper-head h3 { font-size: 21px; letter-spacing: -0.01em; margin-bottom: 6px; }
.paper-sub { font-size: 12.5px; color: var(--text-2); margin-bottom: 14px; }

.paper-grid {
  display: grid;
  grid-template-columns: 214px 1fr;
  gap: 18px;
  align-items: start;
}
.paper-list { list-style: none; display: grid; gap: 2px; max-height: 380px; overflow-y: auto; scrollbar-width: thin; }
.paper-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-radius: 8px;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.5;
}
.paper-item .pi-dot {
  width: 6px; height: 6px;
  flex: none;
  border-radius: 50%;
  background: #D8DAE2;
}
.paper-item.doing { background: var(--primary-soft); color: var(--primary-deep); }
.paper-item.doing .pi-dot { background: var(--primary); animation: dotPulse 1.2s ease-in-out infinite; }
.paper-item.done { color: var(--text-2); }
.paper-item.done .pi-dot { background: var(--mint); }

.paper-view { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--card-2); }
.paper-body {
  min-height: 320px;
  max-height: 380px;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.9;
  color: #3A3F4B;
}
.paper-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  .pay-modal { padding: 0; align-items: end; }
  .pay-card { max-width: 100%; border-radius: 20px 20px 0 0; padding: 24px 18px 16px; max-height: 92vh; overflow-y: auto; }
  .pay-grid { grid-template-columns: 1fr; gap: 18px; }
  .qr-frame { max-width: 232px; margin: 12px auto 0; }
  .pay-side { gap: 8px; }
  .pay-includes { display: none; }
  .pay-foot { flex-direction: column; align-items: stretch; }
  .pay-claim { width: 100%; height: 38px; }
  .pay-safe { order: 2; text-align: center; }
  .paper-grid { grid-template-columns: 1fr; }
  .paper-list { display: flex; flex-wrap: wrap; gap: 6px; max-height: none; }
  .paper-item { padding: 5px 9px; background: var(--card-2); border: 1px solid var(--line); }
  .paper-body { min-height: 220px; max-height: 300px; }
  .result-actions .link-copy { margin-left: 0; }
}

/* 正文面板：仅在流式写入时显示光标 */
.paper-body::after { content: none; }
.paper-body.streaming::after {
  content: "▍";
  color: var(--primary);
  animation: caret 1s steps(2) infinite;
}

/* ============================================
   账号入口 / 登录 / 我的订单
   ============================================ */
.nav-user {
  border: 1px solid var(--line-2);
  background: #fff;
  height: 30px;
  padding: 0 12px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.2s;
}
.nav-user:hover { border-color: #C6C9D4; color: var(--text); }
.nav-user.logged { border-color: var(--primary-border); background: var(--primary-soft); color: var(--primary-deep); }

.auth-modal, .orders-modal {
  position: fixed; inset: 0; z-index: 440;
  display: grid; place-items: center; padding: 20px;
}
.auth-scrim, .orders-scrim {
  position: absolute; inset: 0;
  background: rgba(38, 42, 52, 0.44);
  backdrop-filter: blur(6px);
  animation: fadeIn 0.28s var(--ease);
}
.auth-card {
  position: relative;
  width: 100%;
  max-width: 404px;
  background: #fff;
  border-radius: 18px;
  padding: 30px 30px 24px;
  box-shadow: 0 34px 80px -26px rgba(30, 35, 50, 0.4);
  animation: panelIn 0.4s var(--ease);
}
.auth-card h3 { font-size: 19px; margin-bottom: 10px; }
.auth-label-2 { margin-top: 14px; }
.auth-code-row { display: flex; gap: 8px; }
.auth-code-row .key-input { flex: 1; height: 42px; }
.auth-code-btn {
  flex: none;
  width: 104px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--primary-border);
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-family: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: all 0.2s;
}
.auth-code-btn:hover:not(:disabled) { background: #E4EBFF; }
.auth-code-btn:disabled { opacity: 0.55; cursor: default; }
/* 人机校验（仅在短信频次超阈值时出现） */
.auth-challenge {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  background: #FFF8EC;
  border: 1px solid #F3DCB6;
}
.auth-challenge[hidden] { display: none; }
.auth-challenge-q {
  flex: none;
  font-size: 13px;
  font-weight: 600;
  color: #A26A18;
  font-variant-numeric: tabular-nums;
}
.auth-challenge .key-input { width: 88px; height: 36px; text-align: center; }
.auth-tip { margin-top: 10px; min-height: 16px; font-size: 11.5px; color: var(--text-3); line-height: 1.6; }
.auth-tip.ok { color: #1F9D6F; }
.auth-tip.err { color: #D0603A; }

/* 订单弹层 */
.orders-card {
  position: relative;
  width: 100%;
  max-width: 620px;
  max-height: 84vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 20px;
  padding: 28px 28px 20px;
  box-shadow: 0 40px 90px -30px rgba(28, 33, 48, 0.45);
  animation: panelIn 0.42s var(--ease);
}
.orders-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.orders-head h3 { font-size: 19px; margin-bottom: 5px; }
.orders-user { font-size: 12px; color: var(--text-3); }
.orders-out {
  border: 1px solid var(--line-2);
  background: #fff;
  height: 30px;
  padding: 0 11px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 12px;
  color: var(--text-2);
  cursor: pointer;
  flex: none;
}
.orders-out:hover { border-color: #C6C9D4; color: var(--text); }

.orders-search { display: flex; gap: 8px; margin: 18px 0 14px; }
.orders-search .key-input { flex: 1; height: 40px; }
.orders-search-btn {
  flex: none;
  padding: 0 16px;
  height: 40px;
  border-radius: 10px;
  border: 0;
  background: linear-gradient(180deg, #6B8DFF, var(--primary-deep));
  color: #fff;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
}
.orders-search-btn:hover { transform: translateY(-1px); }

.orders-list { flex: 1; overflow-y: auto; display: grid; gap: 10px; padding-right: 2px; scrollbar-width: thin; }
.orders-empty { font-size: 12.5px; color: var(--text-3); text-align: center; padding: 28px 0; }
.orders-note { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 11.5px; color: var(--text-3); line-height: 1.7; }

.order-card {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 14px 15px;
  background: var(--card-2);
  transition: border-color 0.2s;
}
.order-card:hover { border-color: var(--primary-border); }
.oc-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 7px; }
.oc-no {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 0.02em;
}
.oc-status {
  padding: 1px 7px;
  border-radius: 5px;
  font-size: 10.5px;
  font-weight: 500;
  background: #F2F2F6;
  color: var(--text-3);
}
.oc-status.paid { background: var(--mint-soft); color: #1F8A63; }
.oc-status.ready { background: var(--primary-soft); color: var(--primary-deep); }
.order-card h4 { font-size: 13.5px; font-weight: 500; line-height: 1.5; margin-bottom: 5px; }
.oc-meta { font-size: 11.5px; color: var(--text-3); }
.oc-files { margin-top: 9px; display: grid; gap: 5px; }
.oc-file {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--primary-deep);
  text-decoration: none;
  padding: 5px 9px;
  border-radius: 7px;
  background: #fff;
  border: 1px solid var(--primary-border);
  justify-self: start;
  max-width: 100%;
}
.oc-file:hover { background: var(--primary-soft); }
.oc-file span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.oc-wait { font-size: 11.5px; color: var(--text-3); }
.oc-actions { margin-top: 10px; display: flex; gap: 8px; }
.oc-btn {
  border: 1px solid var(--line-2);
  background: #fff;
  height: 28px;
  padding: 0 11px;
  border-radius: 7px;
  font-family: inherit;
  font-size: 11.5px;
  color: var(--text-2);
  cursor: pointer;
}
.oc-btn:hover { border-color: var(--primary-border); color: var(--primary-deep); }
.oc-outline {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 9px;
  background: #fff;
  border: 1px dashed var(--line-2);
  max-height: 190px;
  overflow-y: auto;
  font-size: 11.5px;
  line-height: 1.85;
  color: var(--text-2);
  white-space: pre-wrap;
}

@media (max-width: 720px) {
  .auth-modal, .orders-modal { padding: 0; align-items: end; }
  .auth-card { max-width: 100%; border-radius: 20px 20px 0 0; padding: 26px 20px 20px; }
  .orders-card { max-width: 100%; border-radius: 20px 20px 0 0; max-height: 88vh; padding: 24px 18px 16px; }
  .nav-user { width: 100%; height: 40px; }
}

/* ===================================================
   引擎状态卡 / 合规页脚 / 账号数据权利
   =================================================== */
.engine-state {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--bg-2, #f6f6f9);
  border: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-2);
  margin-bottom: 16px;
}
.es-dot {
  width: 8px; height: 8px; border-radius: 50%; flex: none;
  background: var(--text-3, #9a948d);
}
.es-dot.on { background: #12a150; box-shadow: 0 0 0 3px rgba(18, 161, 80, .14); }
.es-dot.off { background: #f09900; box-shadow: 0 0 0 3px rgba(240, 153, 0, .14); }
.engine-points {
  margin: 0 0 20px;
  padding-left: 18px;
  font-size: 12px;
  line-height: 1.85;
  color: var(--text-3);
}
.engine-points li { margin: 2px 0; }

/* 页脚：三段式 */
.footer { padding: 30px 0 34px; }
.footer-inner { display: block; }
.foot-top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; flex-wrap: wrap; margin-bottom: 14px;
}
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.foot-links a {
  font-size: 12px; color: var(--text-2);
  padding: 2px 0; transition: color .16s;
}
.foot-links a:hover { color: var(--primary); }
/* 页脚最右侧的后台管理入口：与文档类链接区分开 */
.foot-links .foot-admin {
  margin-left: 6px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
  color: var(--text-3);
}
.foot-links .foot-admin::after {
  content: " ↗";
  font-size: 10px;
  vertical-align: 1px;
}
.foot-links .foot-admin:hover { color: var(--primary-deep); }
.foot-note {
  font-size: 11.5px !important;
  color: var(--text-3) !important;
  line-height: 1.85;
  max-width: 760px;
  margin-bottom: 10px !important;
}
.foot-legal {
  font-size: 11px !important;
  color: var(--text-3) !important;
  line-height: 1.9;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.foot-legal .sep { margin: 0 6px; opacity: .6; }
/* 备案号与主体名称不可拆行：「粤ICP备…号-1」断成两行无法核对，
   「阳江/市江城区」这种地名被拆开还会读成另一个地方 */
.foot-legal .nb,
.foot-legal .foot-icp,
.foot-legal .foot-beian { white-space: nowrap; }

/* 协议勾选内链 */
.agree a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.agree a:hover { opacity: .85; }

/* 订单弹层数据权利 */
.orders-legal {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; flex-wrap: wrap; margin-top: 12px;
}
.legal-link {
  background: none; border: none; padding: 2px 0;
  font-size: 11.5px; color: var(--text-3); cursor: pointer;
  text-decoration: underline; text-underline-offset: 2px;
}
.legal-link:hover { color: var(--primary); }
.legal-link.danger:hover { color: #e5533d; }
.legal-sep { color: var(--line); font-size: 11px; }

@media (max-width: 640px) {
  .foot-top { flex-direction: column; align-items: flex-start; gap: 10px; }
  .foot-links { gap: 4px 14px; }
  .footer { padding: 24px 0 28px; }
}

/* ===================================================
   引擎未连接提示条（静态预览 / 服务未启动）
   =================================================== */
.engine-off {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
  border: 1px solid #F3D6A8;
  background: #FFF9EF;
  border-radius: 12px;
}
.eo-dot {
  flex: none;
  width: 8px; height: 8px;
  margin-top: 6px;
  border-radius: 50%;
  background: #f09900;
  box-shadow: 0 0 0 3px rgba(240, 153, 0, 0.16);
}
.eo-txt { display: flex; flex-direction: column; gap: 3px; flex: 1; min-width: 0; }
.eo-txt b { font-size: 13px; color: #8a5a00; font-weight: 600; }
.eo-txt span { font-size: 12px; color: #9a7420; line-height: 1.65; }
.eo-txt code {
  font-family: var(--mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  background: #fff;
  border: 1px solid #F3D6A8;
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 11.5px;
}
.eo-btn {
  flex: none;
  align-self: center;
  border: 1px solid #F3D6A8;
  background: #fff;
  color: #8a5a00;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.eo-btn:hover { background: #FFF3DE; }

@media (max-width: 640px) {
  .engine-off { flex-wrap: wrap; }
  .eo-btn { width: 100%; }
}

/* ============================================
   制作进度 + 交付下载
   ============================================ */
.paper-panel { max-width: 760px; }

.dc-wrap {
  position: relative;
  overflow: hidden;
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #FBFCFF, #fff);
  margin-bottom: 16px;
}

/* ===== 生成动画层：公式与文字不停浮现 ===== */
.dc-fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(closest-side at 50% 50%, #000 60%, transparent 100%);
  mask-image: radial-gradient(closest-side at 50% 50%, #000 60%, transparent 100%);
}

.dc-fx span {
  position: absolute;
  white-space: nowrap;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: rgba(84, 125, 251, 0.30);
  opacity: 0;
  transform: translateY(14px) scale(0.94);
  animation: dcFx 3.8s ease-in-out forwards;
  will-change: transform, opacity;
}

.dc-fx span.t {
  font-family: inherit;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: rgba(126, 99, 242, 0.32);
}

@keyframes dcFx {
  0%   { opacity: 0; transform: translateY(16px) scale(0.92); }
  16%  { opacity: 1; }
  68%  { opacity: 0.85; }
  100% { opacity: 0; transform: translateY(-30px) scale(1.05); }
}

.dc-ring {
  position: relative;
  z-index: 1;
  flex: none;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--primary) 0deg, var(--line) 0deg);
  transition: background 0.6s linear;
}
.dc-ring::before {
  content: "";
  position: absolute;
  inset: 11px;
  border-radius: 50%;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(84, 125, 251, 0.06);
}
.dc-num { position: relative; text-align: center; line-height: 1.15; }
.dc-num b {
  display: block;
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--text);
}
.dc-num span { font-size: 11px; color: var(--text-3); }
/* 24 小时交付窗口下，圆环里显示「23h58m」/「已完成」，字号收一档避免溢出 */
.dc-num.is-long b { font-size: 19px; letter-spacing: 0; }

.dc-info { flex: 1; min-width: 0; position: relative; z-index: 1; }
.dc-order {
  font-size: 12px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  flex-wrap: wrap;            /* 订单号 14 位，窄屏放不下时让「复制」换行，不要把面板撑宽 */
  gap: 8px;
  margin-bottom: 7px;
}
.dc-order b {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text);
  letter-spacing: 0.02em;
  min-width: 0;
  overflow-wrap: anywhere;
}
.dc-copy {
  border: 1px solid var(--line-2);
  background: #fff;
  border-radius: 6px;
  font-family: inherit;
  font-size: 11px;
  color: var(--text-3);
  padding: 2px 7px;
  cursor: pointer;
}
.dc-copy:hover { color: var(--primary-deep); border-color: var(--primary-border); }

.dc-desc { font-size: 12.5px; color: var(--text-2); line-height: 1.75; margin-bottom: 12px; }

.dc-steps { list-style: none; display: grid; gap: 7px; }
.dc-steps li {
  position: relative;
  padding-left: 20px;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
}
.dc-steps li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.5px solid var(--line-2);
  background: #fff;
}
.dc-steps li.done { color: var(--text-2); }
.dc-steps li.done::before { border-color: var(--mint); background: var(--mint); }
.dc-steps li.active { color: var(--primary-deep); font-weight: 500; }
.dc-steps li.active::before { border-color: var(--primary); background: var(--primary); animation: dotPulse 1.2s ease-in-out infinite; }

.deliver-box {
  border: 1px solid #CFE7DA;
  background: #F6FCF9;
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 12px;
  animation: fadeUp 0.4s var(--ease);
}
.db-title { font-size: 12px; font-weight: 600; color: #1F7A57; margin-bottom: 10px; letter-spacing: 0.02em; }
.db-files { display: grid; gap: 8px; }
.db-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  text-decoration: none;
  color: inherit;
  transition: all 0.18s var(--ease);
}
.db-file:hover { border-color: var(--primary-border); box-shadow: 0 6px 18px -12px rgba(30, 35, 50, 0.35); }
.db-name {
  flex: 1;
  min-width: 0;
  font-size: 12.5px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.db-file b { font-size: 11.5px; color: var(--text-3); font-weight: 400; font-variant-numeric: tabular-nums; }
.db-file i {
  flex: none;
  font-style: normal;
  font-size: 11.5px;
  color: var(--primary-deep);
  background: var(--primary-soft);
  border-radius: 6px;
  padding: 3px 9px;
}
/* 手机上文件名容易被「含 AI 标识 + 大小 + 下载」挤到只剩几个字：
   优先保留文件名与标识，把体积让位 */
@media (max-width: 480px) {
  .db-file b { display: none; }
  .db-ai { font-size: 10px; padding: 2px 5px; }
}

/* 交付文件是否带 AI 生成标识，来自服务器记录，客户端只读展示 */
.db-ai {
  flex: none;
  font-size: 10.5px;
  color: #1a7f4b;
  background: rgba(26, 127, 75, 0.09);
  border-radius: 5px;
  padding: 2px 6px;
  white-space: nowrap;
}

.deliver-hint { font-size: 11.5px; color: var(--text-3); line-height: 1.7; }

/* 凭订单号取件 */
.pickup-modal, .pickup-scrim {
  position: fixed;
  inset: 0;
  z-index: 120;
}
.pickup-modal { display: grid; place-items: center; padding: 24px; }
.pickup-modal[hidden] { display: none; }
.pickup-scrim { background: rgba(43, 47, 54, 0.45); backdrop-filter: blur(6px); }
.pickup-card {
  position: relative;
  width: 100%;
  max-width: 460px;
  max-height: 82vh;
  overflow-y: auto;
  background: #fff;
  border-radius: 18px;
  padding: 26px 26px 20px;
  box-shadow: 0 40px 90px -30px rgba(28, 33, 48, 0.45);
  animation: panelIn 0.4s var(--ease);
  z-index: 1;
}
.pickup-card h3 { font-size: 18px; margin: 6px 0 8px; }
.pickup-row { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.pickup-row .key-input { flex: 1 1 160px; min-width: 0; height: 40px; }
.pickup-tip { margin-top: 10px; min-height: 15px; font-size: 11.5px; color: #D0603A; }
.pickup-result:not(:empty) { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 14px; }
.pk-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
/* 订单号变长后，meta 行与说明文字必须能断行，否则撑出横向滚动 */
.pk-meta, .pk-note, .pickup-tip { overflow-wrap: anywhere; }
.pk-head b { font-size: 14px; line-height: 1.5; }
.pk-status {
  flex: none;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 6px;
  background: #F0F0F4;
  color: var(--text-3);
}
.pk-status.ready { background: var(--mint-soft); color: #1F7A57; }
.pk-status.paid { background: var(--primary-soft); color: var(--primary-deep); }
.pk-meta { font-size: 11.5px; color: var(--text-3); margin-bottom: 8px; }
.pk-note { font-size: 12px; color: var(--text-2); line-height: 1.7; margin-bottom: 10px; }
.pk-wait { font-size: 12px; color: var(--text-3); line-height: 1.7; }

@media (max-width: 720px) {
  .dc-wrap { flex-direction: column; align-items: stretch; gap: 16px; text-align: left; }
  .dc-ring { margin: 0 auto; }
  .pickup-modal { padding: 0; align-items: end; }
  .pickup-card { max-width: 100%; border-radius: 20px 20px 0 0; }
}

.orders-note a { color: var(--primary-deep); text-decoration: none; }
.orders-note a:hover { text-decoration: underline; }

/* ============================================
   增值服务（替代原计划安排）
   ============================================ */
.vas-opt {
  font-style: normal;
  font-size: 11px;
  font-weight: 400;
  color: var(--primary-deep);
  background: var(--primary-soft);
  border-radius: 6px;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: 2px;
}
.vas-hint {
  font-size: 12px !important;
  color: var(--text-3) !important;
  line-height: 1.7 !important;
  margin: -3px 0 12px !important;
}
.vas-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.vas {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  text-align: left;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  font-family: inherit;
  transition: border-color .16s, box-shadow .16s, background .16s;
}
.vas:hover { border-color: var(--primary-border); }
.vas.on {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: 0 8px 20px -14px rgba(84, 125, 251, .55);
}
.vas-check {
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  border-radius: 5px;
  border: 1.5px solid var(--line-2);
  background: #fff;
  color: #fff;
  font-size: 11px;
  line-height: 13px;
  text-align: center;
  transition: all .16s;
}
.vas.on .vas-check { background: var(--primary); border-color: var(--primary); }
.vas-main { flex: 1; min-width: 0; display: grid; gap: 3px; }
.vas-name { font-size: 12.5px; font-weight: 600; color: var(--text); line-height: 1.4; }
.vas-hot {
  font-style: normal;
  font-size: 10px;
  font-weight: 500;
  color: #D0603A;
  background: #FDF0E9;
  border-radius: 5px;
  padding: 1px 6px;
  margin-left: 6px;
  vertical-align: 1px;
}
.vas-desc { font-size: 11px; color: var(--text-3); line-height: 1.55; }
.vas-price {
  flex: none;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--primary-deep);
  margin-top: 2px;
}
.vas-total {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 12px;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--text-3);
}
.vas-total b { font-variant-numeric: tabular-nums; color: var(--text); font-weight: 600; }
.vt-sum { font-size: 13px; }
.vt-sum b { color: var(--primary-deep); font-size: 16px; }

/* 结果页 · 生成模型档位选择 */
.tier-seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tier-opt {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 34px 12px 16px;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--card-2);
  cursor: pointer;
  text-align: left;
  transition: border-color .18s, box-shadow .18s, background .18s;
}

.tier-opt b { font-size: 14.5px; letter-spacing: -0.01em; }

.tier-opt span {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.5;
}

.tier-opt::after {
  content: '';
  position: absolute;
  top: 14px;
  right: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1.5px solid var(--line-2);
  background: #fff;
  transition: all .18s;
}

.tier-opt.on {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(84,125,251,.06), rgba(84,125,251,.02));
  box-shadow: 0 2px 10px rgba(84,125,251,.12);
}

.tier-opt.on::after {
  border-color: var(--primary);
  background: radial-gradient(circle, var(--primary) 0 42%, #fff 46%);
}

.tier-opt:not(.on):hover { border-color: var(--line-2); }

/* 结果页操作区下方的模型选择块 */
.tier-foot { margin-top: 16px; }

.tier-price {
  margin-top: 3px;
  font-style: normal;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-deep);
  font-variant-numeric: tabular-nums;
}

.tier-price.tier-pro { color: #7a55f2; }

@media (max-width: 720px) {
  .vas-list { grid-template-columns: 1fr; }
  .vas-total { justify-content: space-between; gap: 8px; flex-wrap: wrap; }
  .tier-seg { grid-template-columns: 1fr; }
}

/* ===================================================
   V2 · 工作台布局（左侧栏 + 顶栏 + 居中工作区）
   =================================================== */

body { background: #fff; font-size: 14.5px; }

.app { display: flex; min-height: 100vh; align-items: stretch; }

/* ---------- 左侧栏 ---------- */
.rail {
  width: var(--rail);
  flex: none;
  background: #FCFCFD;
  border-right: 1px solid var(--line);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 12px;
  z-index: 90;
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 18px 14px;
  flex: none;
}

.rail-brand .brand-mark { width: 27px; height: 27px; color: var(--text); flex: none; }
.rail-brand .brand-text b { font-size: 14.5px; font-weight: 700; letter-spacing: 0.1em; }
.rail-brand .brand-text i { font-size: 7.5px; letter-spacing: 0.2em; margin-top: 2px; }

.rail-body { flex: 1; overflow-y: auto; padding: 0 10px 8px; }
.rail-body::-webkit-scrollbar { width: 0; height: 0; }

.rail-label {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.05em;
  padding: 12px 10px 7px;
  font-weight: 500;
}

.rail-list { display: flex; flex-direction: column; gap: 1px; }

.side-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 7px 9px;
  border: 0;
  background: transparent;
  border-radius: 9px;
  cursor: pointer;
  text-align: left;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.3;
  transition: background 0.16s var(--ease), color 0.16s var(--ease);
}
.side-item:hover { background: #F3F3F7; color: var(--text); }
.side-item.active {
  background: #ECECF2;
  color: var(--text);
  font-weight: 600;
}

.side-item .s-ico {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  display: grid;
  place-items: center;
  flex: none;
  background: #F2F2F6;
}
.side-item .s-ico svg { width: 14px; height: 14px; }
.side-item.active .s-ico { background: #fff; }

.side-item .s-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.side-item .s-badge {
  flex: none;
  font-size: 10px;
  font-weight: 500;
  color: var(--orange);
  background: var(--orange-soft);
  border-radius: 4px;
  padding: 1px 4px;
  letter-spacing: 0;
}
.side-item.active .s-badge { background: #fff; }

.rail-foot { flex: none; padding: 12px 12px 0; border-top: 1px solid var(--line); margin: 8px 4px 0; }

.rail-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
  padding: 0 14px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s var(--ease);
}
.rail-cta:hover { background: #000; transform: translateY(-1px); }
.rail-cta svg { width: 14px; height: 14px; }

.rail-note {
  font-size: 10.5px;
  color: var(--text-3);
  line-height: 1.55;
  margin-top: 9px;
  text-align: center;
}

/* ---------- 主区 ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  height: 58px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 26px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px) saturate(160%);
  position: sticky;
  top: 0;
  z-index: 60;
}

.tb-left { display: flex; align-items: center; gap: 10px; min-width: 0; }

.tb-chip {
  height: 27px;
  padding: 0 12px;
  border-radius: 999px;
  background: #F4F4F8;
  font-size: 12.5px;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  flex: none;
}

.tb-text { font-size: 12.5px; color: var(--text-3); white-space: nowrap; }

.tb-nav { display: flex; align-items: center; gap: 22px; font-size: 13.5px; color: var(--text-2); flex: none; }
.tb-nav a { transition: color 0.18s; }
.tb-nav a:hover { color: var(--text); }

.tb-user {
  height: 33px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: #fff;
  font-size: 12.5px;
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s var(--ease);
}
.tb-user:hover { border-color: #C8C8D2; }
.tb-user.logged { border-color: transparent; background: var(--primary); color: #fff; }
.tb-user.logged:hover { background: #000; }

.nav-toggle {
  display: none;
  position: static;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span { display: block; width: 14px; height: 1.5px; background: var(--text); border-radius: 2px; transition: transform 0.25s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(2.75px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { transform: translateY(-2.75px) rotate(-45deg); }

.workspace { width: 100%; max-width: 880px; margin: 0 auto; padding: 42px 26px 76px; }
#top, #features, #steps, #briefForm { scroll-margin-top: 76px; }

/* ---------- HERO ---------- */
.hero { text-align: center; margin-bottom: 26px; }

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.03em;
}
.hk-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(15, 138, 95, 0.12);
}

.hero h1 {
  font-size: clamp(29px, 4.4vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin: 11px 0 13px;
  color: var(--text);
}
.hero h1 .em {
  background: linear-gradient(transparent 64%, var(--accent-soft) 64%);
  -webkit-background-clip: border-box;
  background-clip: border-box;
  color: var(--text);
  font-family: var(--sans);
  font-weight: 800;
  padding: 0 2px;
}

.hero-sub {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 530px;
  margin: 0 auto;
}

/* ---------- 引擎离线提示 ---------- */
.engine-off {
  display: flex;
  align-items: center;
  gap: 11px;
  border: 1px solid #F5DFC0;
  background: #FFFBF3;
  border-radius: 12px;
  padding: 11px 14px;
  margin-bottom: 18px;
}
.eo-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); flex: none; }
.eo-txt { flex: 1; min-width: 0; font-size: 12px; line-height: 1.6; }
.eo-txt b { display: block; font-size: 12.5px; }
.eo-txt span { color: var(--text-3); }
.eo-btn {
  flex: none;
  height: 28px;
  padding: 0 12px;
  border: 1px solid #EBD6B4;
  background: #fff;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
}

/* ---------- 表单卡片 ---------- */
.composer {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 22px 22px 18px;
  box-shadow: 0 1px 2px rgba(20, 20, 26, 0.03), 0 20px 48px -30px rgba(20, 20, 26, 0.22);
}

.cf-block { padding-bottom: 2px; }

.cf-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.cf-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.01em;
}
.cf-label .req, .plabel .req { color: var(--red); font-style: normal; margin-left: 2px; }

.cf-count { font-size: 11.5px; color: var(--text-3); flex: none; transition: color 0.2s; }
.cf-count.is-long { color: var(--orange); }

.cf-title {
  display: block;
  width: 100%;
  margin-top: 7px;
  padding: 0;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  font-size: 19px;
  line-height: 1.55;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  min-height: 58px;
  overflow: hidden;
}
.cf-title::placeholder { color: #B9B9C5; font-weight: 500; }

.cf-split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }

.prow { margin: 0 0 16px; }
.prow:last-child { margin-bottom: 0; }

.plabel {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 8px;
}
.opt-hint { font-size: 11.5px; color: var(--text-3); font-weight: 400; line-height: 1.5; }
.fmt-hint { font-size: 11.5px; color: var(--text-3); margin-top: 7px; line-height: 1.6; }

.pinput {
  width: 100%;
  height: 42px;
  padding: 0 13px;
  font-size: 13.5px;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #FCFCFD;
  color: var(--text);
  transition: all 0.18s var(--ease);
}
.pinput:focus {
  outline: none;
  border-color: #C4BFFF;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.08);
}
.pinput::placeholder { color: #B9B9C5; }

.ptextarea {
  width: 100%;
  padding: 11px 13px;
  font-size: 13.5px;
  line-height: 1.75;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #FCFCFD;
  color: var(--text);
  resize: vertical;
  transition: all 0.18s var(--ease);
}
.ptextarea:focus {
  outline: none;
  border-color: #C4BFFF;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.08);
}
.ptextarea::placeholder { color: #B9B9C5; }

/* 分段选择：浅灰胶囊 + 白色滑块 */
.seg {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 3px;
  background: #F5F5F8;
  border-radius: 10px;
  border: 0;
}
.seg-item {
  height: 30px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s var(--ease);
}
.seg-item:hover { color: var(--text); }
.seg-item.active {
  background: #fff;
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(20, 20, 26, 0.12);
}
.seg-sm { padding: 2px; }
.seg-sm .seg-item { height: 27px; padding: 0 11px; font-size: 12px; }

/* 模式卡片 */
.mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mode-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-align: left;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.mode-card:hover { border-color: #CFCFDA; }
.mode-card.active {
  border-color: var(--text);
  background: #FCFCFD;
  box-shadow: inset 0 0 0 1px var(--text);
}
.mode-name { font-size: 13.5px; font-weight: 600; color: var(--text); }
.mode-desc { font-size: 11.5px; color: var(--text-3); line-height: 1.55; }
.mode-speed { font-size: 11px; color: var(--text-3); margin-top: 1px; }
.mode-badge {
  position: absolute;
  top: -8px;
  right: 10px;
  font-size: 10px;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 2px 7px;
  letter-spacing: 0;
}

/* 芯片 */
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  height: 30px;
  padding: 0 13px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: #fff;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.chip:hover { border-color: #C4C4D0; color: var(--text); }
.chip.on {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
}

/* 上传区 */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 22px 16px;
  border: 1px dashed var(--line-2);
  border-radius: 12px;
  background: #FCFCFD;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s var(--ease);
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: #FBFAFF; }
.dropzone svg { width: 22px; color: var(--accent); margin-bottom: 4px; }
.dropzone b { font-size: 12.5px; font-weight: 500; color: var(--text); }
.dropzone span { font-size: 11.5px; color: var(--text-3); }
.dropzone-sm { padding: 16px; }

/* 折叠区 */
.advanced {
  margin-top: 4px;
  border-top: 1px solid var(--line);
  padding-top: 2px;
}
.advanced summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 11px 0 9px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  user-select: none;
}
.advanced summary:hover { color: var(--text); }
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary svg { width: 13px; transition: transform 0.28s var(--ease); color: var(--text-3); }
.advanced[open] summary svg { transform: rotate(180deg); }
.advanced summary em { font-style: normal; font-weight: 400; font-size: 11.5px; color: var(--text-3); }
.adv-body { padding: 8px 0 4px; }

/* 提示与错误 */
.perr { font-size: 12px; color: var(--red); margin-top: 7px; }
.linklike {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 0;
  background: transparent;
  padding: 0;
  font-size: 12.5px;
  color: var(--accent);
  cursor: pointer;
}
.linklike svg { width: 13px; height: 13px; }
.linklike:hover { text-decoration: underline; }

/* 提交区 */
.cf-foot {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.cf-foot .agree { flex: 1; margin: 0; min-width: 0; }
.cf-foot .perr { flex-basis: 100%; }

.submit {
  flex: none;
  width: auto;
  height: 46px;
  padding: 0 28px;
  border: 0;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.22s var(--ease);
  box-shadow: 0 10px 24px -14px rgba(20, 20, 26, 0.7);
}
.submit:hover { background: #000; transform: translateY(-1px); box-shadow: 0 14px 30px -14px rgba(20, 20, 26, 0.75); }
.submit:active { transform: none; }
.submit:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }
.submit svg { width: 15px; height: 15px; }

.agree { display: flex; align-items: flex-start; gap: 8px; font-size: 11.5px; color: var(--text-3); line-height: 1.65; cursor: pointer; }
.agree .box { margin-top: 2px; }
.agree a { color: var(--text-2); border-bottom: 1px solid var(--line-2); }
.agree a:hover { color: var(--accent); border-color: var(--accent); }

.model-line {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  font-size: 11.5px;
  color: var(--text-3);
}
.m-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); flex: none; }
.m-link {
  border: 0;
  background: none;
  padding: 0;
  font-size: 11.5px;
  color: var(--text-3);
  text-decoration: underline;
  cursor: pointer;
}
.under-note { font-size: 11.5px; color: #B0B0BC; margin-top: 6px; line-height: 1.6; }

/* 题目推荐建议列表 */
.suggest-row { margin-top: 6px; }
.suggest-list { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.suggest-list button {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #FCFCFD;
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.suggest-list button:hover { border-color: var(--accent); background: #FBFAFF; color: var(--text); }

/* ---------- 快捷入口 ---------- */
.quick { margin-top: 30px; }
.quick-label { font-size: 12px; color: var(--text-3); margin-bottom: 11px; letter-spacing: 0.02em; }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.quick-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.quick-item:hover {
  border-color: #D2D2DE;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -18px rgba(20, 20, 26, 0.4);
}
.qi-ico {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  margin-bottom: 7px;
}
.qi-ico svg { width: 16px; height: 16px; }
.qi-1 { background: #EFF2FF; color: #3D63F5; }
.qi-2 { background: #FFF3E6; color: #D97B0B; }
.qi-3 { background: #E9F8F1; color: #0F8A5F; }
.qi-4 { background: #F2EEFF; color: #6B4EFF; }
.qi-5 { background: #FFEFF3; color: #D64570; }
.qi-6 { background: #EAF6FE; color: #1C7FBF; }
.qi-name { font-size: 13px; font-weight: 600; color: var(--text); }
.qi-desc { font-size: 11px; color: var(--text-3); line-height: 1.5; }

/* ---------- 能力 ---------- */
.sec-title { font-size: 17px; font-weight: 700; letter-spacing: -0.015em; color: var(--text); }
.sec-sub { font-size: 12.5px; color: var(--text-3); margin-top: 6px; line-height: 1.7; }

.features { display: block; margin-top: 44px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 16px; }
.feature {
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
  transition: all 0.2s var(--ease);
}
.feature:hover { border-color: #D9D9E3; }
.f-ico {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: #F4F4F8;
  display: grid;
  place-items: center;
  color: var(--text);
  margin-bottom: 10px;
}
.f-ico svg { width: 15px; height: 15px; }
.feature h3 { font-size: 13.5px; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.feature p { font-size: 12px; color: var(--text-3); line-height: 1.7; }

/* ---------- 步骤 ---------- */
.steps-wrap { margin-top: 44px; }
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
  margin-top: 16px;
  list-style: none;
  padding: 0;
}
.steps li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-size: 12px;
  color: var(--text-2);
}
.steps li b {
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: #F3F3F7;
  color: var(--text);
  display: grid;
  place-items: center;
  font-size: 10.5px;
  font-weight: 600;
  flex: none;
}

/* ---------- 页脚 ---------- */
.footer {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 30px 26px 44px;
  border-top: 1px solid var(--line);
  margin-top: auto;
}
.footer-inner { width: 100%; }

.foot-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.foot-top .brand-text b { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; }
.foot-top .brand-text i { font-size: 7px; letter-spacing: 0.18em; }

.foot-links { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--text-3); }
.foot-links a { transition: color 0.18s; }
.foot-links a:hover { color: var(--text); }
.foot-admin { color: #C0C0CC !important; }

.foot-note {
  font-size: 11.5px;
  color: var(--text-3);
  line-height: 1.8;
  margin-top: 15px;
  max-width: 720px;
}
.foot-legal { font-size: 11px; color: #B4B4C0; line-height: 1.8; margin-top: 9px; }
.foot-legal .sep { margin: 0 2px; color: #D6D6DE; }
.foot-legal a { color: #B4B4C0; border-bottom: 1px solid #E2E2EA; }

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  :root { --rail: 214px; }
  .workspace { padding: 36px 22px 70px; }
}

@media (max-width: 900px) {
  .rail {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    height: 100vh;
    width: 264px;
    transform: translateX(-102%);
    transition: transform 0.28s var(--ease);
    box-shadow: 18px 0 50px -30px rgba(20, 20, 26, 0.3);
    background: #FCFCFD;
  }
  .rail.open { transform: none; }
  .nav-toggle { display: inline-flex; }
  .tb-text { display: none; }
  .topbar { padding: 0 16px; gap: 10px; }
  .tb-nav { gap: 14px; }
  .workspace { padding: 26px 16px 64px; }
  .cf-split { grid-template-columns: 1fr; gap: 0; }
  .mode-cards { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .footer { padding: 26px 16px 40px; }
}

@media (max-width: 620px) {
  .hero h1 { font-size: 27px; letter-spacing: -0.03em; }
  .hero-sub { font-size: 12.5px; }
  .composer { padding: 18px 15px 14px; border-radius: 20px; }
  .cf-title { font-size: 17px; }
  .cf-foot { flex-direction: column; gap: 12px; }
  .submit { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .tb-nav a { display: none; }
  .foot-top { flex-direction: column; align-items: flex-start; }
}

/* 侧栏图标：浅色底 + 彩色描边（覆盖旧的深色渐变底 + 白色图标） */
.side-item .ic-blue   { background: #EFF2FF; color: #3D63F5; }
.side-item .ic-blue2  { background: #EAF6FE; color: #1C7FBF; }
.side-item .ic-purple { background: #F2EEFF; color: #6B4EFF; }
.side-item .ic-cyan   { background: #E8F7FD; color: #1B93BD; }
.side-item .ic-teal   { background: #E9F8F1; color: #0F8A5F; }
.side-item .ic-green  { background: #EBF8EE; color: #2FAE62; }
.side-item .ic-orange { background: #FFF3E6; color: #D97B0B; }
.side-item .ic-pink   { background: #FFEFF3; color: #D64570; }
.side-item.active .ic-blue,
.side-item.active .ic-blue2,
.side-item.active .ic-purple,
.side-item.active .ic-cyan,
.side-item.active .ic-teal,
.side-item.active .ic-green,
.side-item.active .ic-orange,
.side-item.active .ic-pink { background: #fff; }

/* 防止横向溢出 */
html, body { max-width: 100%; overflow-x: hidden; }

/* ---------- 清除旧版遗留的容器约束 ---------- */
.features { max-width: none; margin: 44px 0 0; }
.steps {
  max-width: none;
  margin: 16px 0 0;
  justify-content: stretch;
  flex-wrap: nowrap;
  gap: 9px;
  color: var(--text-2);
  font-size: 12px;
}
.steps li { flex: initial; justify-content: flex-start; }
.steps li:not(:last-child)::after { content: none; }

/* 折叠区：从旧版的「灰底圆角框」改为纯文本行 */
.advanced {
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  overflow: visible;
  margin: 4px 0 0;
  padding-top: 2px;
}
.advanced summary { background: transparent; border: 0; padding: 11px 0 9px; }
.adv-body { padding: 8px 0 4px; border-top: 0; }

.cf-foot { flex-wrap: wrap; }

/* ---------- 全局主色迁移：蓝渐变 → 墨黑 / 紫 ---------- */
.btn-primary {
  background: var(--primary);
  box-shadow: 0 10px 26px -16px rgba(20, 20, 26, 0.85);
}
.btn-primary:hover { background: #000; box-shadow: 0 14px 32px -16px rgba(20, 20, 26, 0.9); }

.gen-track span,
.ch-bar span,
#paperFill {
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

/* 提交区微调 */
.cf-foot { align-items: center; }
.model-line { justify-content: flex-start; }
.under-note { text-align: left; }
.steps li { padding: 13px 12px; }

/* 移动端：脱离 flex 布局，避免侧栏作为 flex item 影响主区宽度 */
@media (max-width: 900px) {
  .app { display: block; }
  .main { width: 100%; }
  .topbar { width: 100%; }
  .workspace { max-width: 100%; }
}

/* 弹窗主按钮统一为墨黑 */
.key-btn.solid,
.pay-claim,
.orders-search-btn {
  background: var(--primary);
  color: #fff;
  border: 0;
  box-shadow: 0 8px 18px -10px rgba(20, 20, 26, 0.8);
}
.key-btn.solid:hover,
.pay-claim:hover { background: #000; }

/* 层级修正：客服球不得盖住弹窗；取件弹窗需在订单弹窗之上 */
.kefu-fab { z-index: 200 !important; }
.pickup-modal, .pickup-scrim { z-index: 600 !important; }

/* 获取验证码：淡紫块 → 白底描边 */
.auth-code-btn {
  border: 1px solid var(--line-2);
  background: #fff;
  color: var(--text);
  font-weight: 500;
}
.auth-code-btn:hover:not(:disabled) { background: #F6F6F9; border-color: #C9C9D4; }

/* 两列字段：数值紧跟标签，避免与右列标签粘连 */
.prows-2 .plabel .val { margin-left: 6px; color: var(--text); font-weight: 600; }
.prows-2 { gap: 22px; }

/* ===================================================
   登录 / 注册 · 三形态弹窗（验证码 / 密码 / 扫码）
   左侧品牌暗场 + 右侧白色表单，替换旧单列表单
   =================================================== */
.auth-modal { padding: 24px; }

.auth-card {
  position: relative;
  display: flex;
  align-items: stretch;
  width: 100%;
  max-width: 900px;
  min-height: 508px;
  padding: 0;
  background: #fff;
  border-radius: 26px;
  overflow: hidden;
  box-shadow: 0 40px 90px -40px rgba(14, 12, 30, 0.55), 0 2px 6px rgba(14, 12, 30, 0.06);
  animation: panelIn 0.42s var(--ease);
}

.auth-x {
  position: absolute;
  top: 15px;
  right: 15px;
  z-index: 4;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: #B4B4C0;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.auth-x:hover { background: #F3F3F7; color: var(--text); border-color: var(--line); }

/* ---------- 左：品牌暗场 ---------- */
.auth-aside {
  position: relative;
  flex: none;
  width: 336px;
  padding: 40px 32px 30px;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(120% 80% at 8% 0%, #322A4D 0%, rgba(50, 42, 77, 0) 60%),
    linear-gradient(158deg, #1D1B28 0%, #131220 44%, #1A1230 100%);
}
.aa-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(120% 90% at 20% 12%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 90% at 20% 12%, #000 0%, transparent 72%);
}
.aa-orbit {
  position: absolute;
  right: -78px;
  bottom: -96px;
  width: 300px;
  height: 300px;
  pointer-events: none;
}
.aa-orbit i {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(150, 124, 255, 0.26);
}
.aa-orbit i:first-child {
  inset: 34px;
  border-color: rgba(150, 124, 255, 0.16);
  animation: aaSpin 26s linear infinite;
  border-top-color: rgba(180, 160, 255, 0.55);
}
.aa-orbit i:last-child {
  inset: 96px;
  background: radial-gradient(circle at 34% 30%, rgba(150, 118, 255, 0.55), rgba(107, 78, 255, 0.06) 68%);
  border-color: rgba(180, 160, 255, 0.22);
  filter: blur(0.3px);
}
@keyframes aaSpin { to { transform: rotate(360deg); } }

.aa-inner { position: relative; z-index: 2; display: flex; flex-direction: column; height: 100%; }

.aa-kicker {
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.42);
  font-weight: 600;
}
.aa-title {
  margin-top: 26px;
  font-size: 27px;
  line-height: 1.42;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.aa-title em {
  font-style: normal;
  background: linear-gradient(96deg, #DCD2FF 0%, #A38CFF 50%, #7E63FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.aa-title::after {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-top: 18px;
  border-radius: 2px;
  background: linear-gradient(90deg, #8E76FF, rgba(142, 118, 255, 0));
}
.aa-sub {
  margin-top: 14px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.4);
}
.aa-list {
  list-style: none;
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.aa-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 12.8px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.66);
}
.aa-list li span {
  flex: none;
  width: 5px;
  height: 5px;
  margin-top: 7px;
  border-radius: 50%;
  background: #8E76FF;
  box-shadow: 0 0 0 3px rgba(142, 118, 255, 0.14);
}
.aa-foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.58);
}
.aa-pill {
  flex: none;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(142, 118, 255, 0.42);
  background: rgba(107, 78, 255, 0.16);
  color: #C9BCFF;
  font-size: 10.5px;
  letter-spacing: 0.04em;
}

/* ---------- 右：表单 ---------- */
.auth-panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 38px 46px 28px;
}
.ap-head h3 {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}
.ap-head h3 i {
  font-style: normal;
  margin: 0 6px;
  color: #C9C9D4;
  font-weight: 400;
}
.ap-head p {
  margin-top: 7px;
  font-size: 12.5px;
  color: var(--text-3);
}

.auth-tabs {
  position: relative;
  display: flex;
  gap: 28px;
  margin-top: 26px;
  border-bottom: 1px solid var(--line);
}
.at-tab {
  position: relative;
  padding: 0 0 12px;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--text-3);
  cursor: pointer;
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}
.at-tab:hover { color: var(--text-2); }
.at-tab.active { color: var(--text); font-weight: 600; }
.at-ink {
  position: absolute;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transition: left 0.34s var(--ease), width 0.34s var(--ease);
}

.auth-pane { padding-top: 22px; flex: 1; }
.auth-pane[hidden] { display: none !important; }

.af-label {
  display: block;
  margin: 15px 0 7px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-3);
}
.auth-pane > .af-label:first-child { margin-top: 0; }

.af-field {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: #fff;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.af-field:focus-within {
  border-color: #7C7C8A;
  box-shadow: 0 0 0 3px rgba(23, 22, 29, 0.055);
}
.af-field input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: 0;
  outline: none;
  background: none;
  font-size: 14px;
  letter-spacing: 0.01em;
}
.af-field input::placeholder { color: #B8B8C4; }
.af-prefix {
  flex: none;
  margin-right: 11px;
  padding-right: 11px;
  border-right: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.2;
}
.af-field-eye { padding-right: 6px; }
.af-eye {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 8px;
  background: none;
  color: #B0B0BE;
  cursor: pointer;
  transition: color 0.18s;
}
.af-eye:hover { color: var(--text-2); }
.af-eye svg { width: 17px; height: 17px; }

.af-row { display: flex; gap: 10px; }
.af-row .af-field { flex: 1; }
.af-code-btn {
  flex: none;
  width: 118px;
  height: 46px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: #fff;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.af-code-btn:hover:not(:disabled) { background: #F7F7FA; border-color: #C6C6D2; }
.af-code-btn:disabled { opacity: 0.55; cursor: default; }

.af-submit {
  width: 100%;
  height: 48px;
  margin-top: 18px;
  border: 0;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  box-shadow: 0 10px 22px -14px rgba(20, 20, 26, 0.9);
}
.af-submit:hover:not(:disabled) { background: #000; transform: translateY(-1px); box-shadow: 0 14px 26px -14px rgba(20, 20, 26, 0.95); }
.af-submit:active:not(:disabled) { transform: translateY(0); }
.af-submit:disabled { opacity: 0.6; cursor: default; }

.af-note, .qr-note {
  margin-top: 14px;
  font-size: 11px;
  line-height: 1.7;
  color: #A6A6B4;
}
.af-hint {
  margin-bottom: 4px;
  padding: 9px 12px;
  border: 1px dashed var(--line-2);
  border-radius: 10px;
  background: #FAFAFC;
  font-size: 11.5px;
  color: var(--text-3);
  line-height: 1.6;
}
.af-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 12px;
  color: #C0C0CC;
}
.af-link {
  padding: 0;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: 12px;
  color: var(--text-2);
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s, color 0.18s;
}
.af-link:hover { color: var(--primary); border-bottom-color: currentColor; }
.af-sep { color: #D6D6DE; }

.auth-tip { margin-top: 10px; min-height: 0; font-size: 11.5px; line-height: 1.6; color: var(--text-3); }
.auth-tip:empty { display: none; }
.auth-tip.ok { color: #1F9D6F; }
.auth-tip.err { color: #D0603A; }

.auth-challenge {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 7px 10px;
  border-radius: 10px;
  background: #FFF8EC;
  border: 1px solid #F3DCB6;
}
.auth-challenge .key-input { width: 88px; height: 34px; text-align: center; }

/* 协议区 */
.ap-consent { margin-top: 18px; }
.ap-consent .auth-agree { font-size: 11px; line-height: 1.65; color: var(--text-3); }
.ap-consent .auth-agree a { color: var(--text-2); text-decoration: none; border-bottom: 1px solid #DCDCE4; }
.ap-consent .auth-agree a:hover { color: var(--primary); }
.ap-qr-consent {
  margin-top: 16px;
  font-size: 11px;
  line-height: 1.7;
  color: #A6A6B4;
}

/* ---------- 扫码 ---------- */
.qr-wrap { display: flex; flex-direction: column; align-items: center; padding-top: 2px; }
.qr-frame {
  position: relative;
  width: 194px;
  height: 194px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 30px -22px rgba(20, 20, 26, 0.6);
}
.qr-frame canvas { width: 100%; height: 100%; display: block; border-radius: 4px; }
.qr-corner {
  position: absolute;
  width: 13px;
  height: 13px;
  border: 2px solid #8E76FF;
  border-radius: 3px;
  opacity: 0.85;
}
.qr-corner.tl { top: -1px; left: -1px; border-right-color: transparent; border-bottom-color: transparent; }
.qr-corner.tr { top: -1px; right: -1px; border-left-color: transparent; border-bottom-color: transparent; }
.qr-corner.bl { bottom: -1px; left: -1px; border-right-color: transparent; border-top-color: transparent; }
.qr-corner.br { bottom: -1px; right: -1px; border-left-color: transparent; border-top-color: transparent; }
.qr-mask {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(3px);
}
.qr-mask p { font-size: 12.5px; color: var(--text-2); }
.qr-mask button {
  padding: 7px 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.18s;
}
.qr-mask button:hover { border-color: var(--primary); }

.qr-state {
  margin-top: 16px;
  min-height: 18px;
  font-size: 12.5px;
  color: var(--text-2);
  text-align: center;
}
.qr-state.ok { color: #1F9D6F; }
.qr-state.err { color: #D0603A; }
.qr-steps {
  list-style: none;
  counter-reset: qs;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  width: 100%;
  max-width: 300px;
}
.qr-steps li {
  counter-increment: qs;
  position: relative;
  padding-left: 24px;
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
}
.qr-steps li::before {
  content: counter(qs);
  position: absolute;
  left: 0;
  top: 1px;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #F4F3FF;
  color: #6B4EFF;
  font-size: 10px;
  font-weight: 600;
}
.qr-note { text-align: center; max-width: 300px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .auth-card { flex-direction: column; max-width: 460px; min-height: 0; }
  .auth-aside { width: 100%; padding: 22px 24px 20px; }
  .aa-grid { -webkit-mask-image: radial-gradient(140% 140% at 10% 0%, #000, transparent 78%); mask-image: radial-gradient(140% 140% at 10% 0%, #000, transparent 78%); }
  .aa-orbit { right: -110px; bottom: -160px; width: 260px; height: 260px; }
  .aa-title { margin-top: 14px; font-size: 20px; line-height: 1.35; }
  .aa-title::after { margin-top: 12px; width: 26px; }
  .aa-sub, .aa-list, .aa-foot { display: none; }
  .auth-panel { padding: 26px 24px 22px; }
  .auth-x { top: 12px; right: 12px; color: rgba(255, 255, 255, 0.6); }
  .auth-x:hover { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: transparent; }
}

@media (max-width: 560px) {
  .auth-modal { padding: 0; align-items: end; }
  .auth-card { max-width: 100%; border-radius: 22px 22px 0 0; animation: sheetUp 0.36s var(--ease); }
  .auth-panel { padding: 22px 18px 18px; }
  .ap-head h3 { font-size: 19px; }
  .auth-tabs { gap: 20px; margin-top: 20px; }
  .at-tab { font-size: 13px; }
  .af-code-btn { width: 104px; font-size: 12px; }
  .qr-frame { width: 172px; height: 172px; padding: 11px; }
}
@keyframes sheetUp { from { transform: translateY(24px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ===================================================
   侧栏 V3：三分组重排 · 去掉逐条「8折」角标 · 放大呼吸感
   =================================================== */
@media (min-width: 1121px) { :root { --rail: 244px; } }
@media (max-width: 1120px) { :root { --rail: 222px; } }

.rail-body {
  padding: 0 10px 6px;
  scrollbar-width: thin;
  scrollbar-color: #E4E4EC transparent;
}
.rail-body::-webkit-scrollbar { width: 5px; height: 0; }
.rail-body::-webkit-scrollbar-thumb { background: #E7E7EF; border-radius: 5px; }
.rail-body::-webkit-scrollbar-thumb:hover { background: #D9D9E3; }
.rail-body::-webkit-scrollbar-track { background: transparent; }

/* 头部：标题 + 统一折扣角标 */
.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px 4px 18px;
}
.rail-head .rail-label {
  padding: 0;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-2);
}
.rail-promo {
  flex: none;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--orange-soft);
  color: var(--orange);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

/* 分组 */
.rail-list { gap: 0; }
.rail-group { display: flex; flex-direction: column; gap: 1px; }

.rail-sub {
  padding: 11px 10px 4px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: #B0B0BE;
}
.rail-group:first-child .rail-sub { padding-top: 4px; }
.rail-group + .rail-group .rail-sub {
  padding-top: 12px;
  border-top: 1px solid #F1F1F6;
}

/* 条目：更高的行高、更大的图标块 */
.rail .side-item {
  padding: 7px 10px;
  gap: 10px;
  border-radius: 10px;
  font-size: 13.2px;
  line-height: 1.35;
}
.rail .side-item .s-ico {
  width: 26px;
  height: 26px;
  border-radius: 8px;
}
.rail .side-item .s-ico svg { width: 14.5px; height: 14.5px; }
.rail .side-item.active {
  background: #ECEDF4;
  box-shadow: inset 0 0 0 1px rgba(23, 22, 29, 0.045);
}

.rail-brand { padding: 16px 18px 10px; }
.rail-foot { padding-top: 11px; }
.rail-note { margin-top: 9px; }

@media (max-width: 900px) {
  .rail-head { padding: 14px 14px 6px 16px; }
  .rail .side-item { padding: 9px 10px; }
}

/* ===================================================
   技术栈选项：分组罗列（编程 / AI / 前后端 / 硬件 / 机械 / 统计）
   =================================================== */
.chips-grouped { display: flex; flex-direction: column; gap: 12px; }

.chip-grp { display: flex; flex-direction: column; }

.chip-sub {
  margin: 0 0 7px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.13em;
  color: #B2B2C0;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 7px; }

.chips-grouped .chip {
  height: 28px;
  padding: 0 11px;
  font-size: 12px;
  border-radius: 7px;
}

@media (max-width: 620px) {
  .chip-row { gap: 6px; }
  .chips-grouped .chip { height: 27px; padding: 0 10px; font-size: 11.5px; }
}

/* ===================================================
   AI 选题建议面板（输入方向 → 3 个题目 + 答辩难度 → 一键填表）
   =================================================== */
.sug-panel {
  margin-top: 10px;
  padding: 15px 16px 16px;
  border: 1px solid #E7E5F6;
  border-radius: 14px;
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(107, 78, 255, 0.05), rgba(107, 78, 255, 0) 62%),
    #FCFCFE;
  animation: sugIn 0.26s var(--ease);
}
@keyframes sugIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

.sug-kicker {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #6B4EFF;
}
.sug-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #6B4EFF;
  box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.12);
}
.sug-lead {
  margin: 7px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-3);
}

.sug-bar { display: flex; gap: 8px; margin-top: 12px; align-items: stretch; }
.sug-input {
  flex: 1;
  min-width: 0;
  padding: 9px 12px;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: #fff;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  resize: vertical;
  outline: none;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.sug-input::placeholder { color: #B6B6C4; font-size: 12.5px; }
.sug-input:focus { border-color: #8B7BF0; box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.09); }

.sug-go {
  flex: none;
  width: 128px;
  border: 0;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.sug-go:hover:not(:disabled) { background: #000; }
.sug-go:disabled { opacity: 0.65; cursor: default; }
.sug-go.loading { opacity: 0.8; }

.sug-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 10px; }
.sug-tags-label { font-size: 10.5px; color: #B0B0BE; letter-spacing: 0.08em; margin-right: 2px; }
.sug-tag {
  padding: 4px 9px;
  border: 1px solid #E4E4EE;
  border-radius: 999px;
  background: #fff;
  font-family: inherit;
  font-size: 11.5px;
  color: var(--text-3);
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.sug-tag:hover { border-color: #C9BFF5; color: #6B4EFF; background: #FBFAFF; }

.sug-hint { margin: 10px 0 0; font-size: 11.5px; line-height: 1.6; color: var(--text-3); }
.sug-hint:empty { display: none; }
.sug-hint.err { color: #D0603A; }
.sug-hint.ok { color: #1F9D6F; }

.sug-results { display: flex; flex-direction: column; gap: 9px; margin-top: 12px; }
.sug-results:empty { display: none; }

.sug-card {
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.sug-card:hover { border-color: #CFC7F3; box-shadow: 0 10px 24px -20px rgba(40, 30, 90, 0.5); }

.sug-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.sug-title {
  margin: 0;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  letter-spacing: 0.005em;
}
.sug-lv {
  flex: none;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.sug-lv.lv-1 { background: #E9F8F1; color: #0F8A5F; }
.sug-lv.lv-2 { background: #FFF4E6; color: #C9760A; }
.sug-lv.lv-3 { background: #FDEDE7; color: #C4501F; }

.sug-why { margin: 8px 0 0; font-size: 12px; line-height: 1.7; color: var(--text-2); }

.sug-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 9px; }
.sug-meta span {
  padding: 2px 8px;
  border-radius: 6px;
  background: #F6F6FA;
  font-size: 10.5px;
  color: var(--text-3);
  line-height: 1.7;
}

.sug-dnote { margin: 8px 0 0; font-size: 11.5px; line-height: 1.7; color: var(--text-3); }
.sug-dnote b { color: var(--text-2); font-weight: 600; margin-right: 4px; }

.sug-use {
  width: 100%;
  height: 34px;
  margin-top: 11px;
  border: 1px solid var(--primary);
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.sug-use:hover { background: #000; border-color: #000; }

.sug-src { margin-top: 10px; font-size: 11px; color: #B0B0BE; }

@media (max-width: 620px) {
  .sug-bar { flex-direction: column; }
  .sug-go { width: 100%; height: 38px; }
  .sug-panel { padding: 13px 13px 14px; }
}

/* ===================================================
   登录弹窗：从「立即生成」进入时的必登录说明条
   =================================================== */
.ap-why {
  position: relative;
  margin: 16px 0 0;
  padding: 9px 12px 9px 30px;
  border: 1px solid #E7E5F6;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(107, 78, 255, 0.055), rgba(107, 78, 255, 0.02));
  font-size: 11.5px;
  line-height: 1.65;
  color: #5646BE;
}
.ap-why[hidden] { display: none !important; }
.ap-why::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 15px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #6B4EFF;
  box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.13);
}

@media (max-width: 560px) {
  .ap-why { margin-top: 13px; padding: 8px 11px 8px 28px; font-size: 11px; }
  .ap-why::before { left: 11px; top: 13px; }
}

/* ===================================================
   V4：应用指南 / 效果展示 / 微信扫码
   =================================================== */
#guide, #showcase { scroll-margin-top: 76px; }

/* ---------- 应用指南 ---------- */
.guide-wrap { margin-top: 52px; }
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.guide-card {
  position: relative;
  padding: 19px 20px 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #FCFCFD, #FFFFFF 42%);
  transition: border-color 0.2s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.guide-card:hover {
  border-color: #D9D7EA;
  transform: translateY(-2px);
  box-shadow: 0 1px 2px rgba(20, 20, 26, 0.03), 0 22px 42px -34px rgba(20, 20, 26, 0.4);
}
.gc-head { display: flex; align-items: center; gap: 9px; }
.gc-no {
  flex: none;
  font-family: var(--serif);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #6B4EFF;
  background: var(--accent-soft);
  border-radius: 7px;
  padding: 2px 7px;
}
.gc-head h3 { flex: 1; font-size: 13.5px; font-weight: 650; letter-spacing: -0.01em; }
.gc-time {
  flex: none;
  font-size: 10.5px;
  color: var(--text-3);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 8px;
}
.guide-card > p { margin-top: 10px; font-size: 12.5px; line-height: 1.8; color: var(--text-2); }
.gc-list { list-style: none; margin-top: 10px; display: grid; gap: 5px; }
.gc-list li { position: relative; padding-left: 14px; font-size: 11.5px; line-height: 1.75; color: var(--text-3); }
.gc-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #C9C6DA;
}

.guide-fit { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.fit-box { border: 1px solid var(--line); border-radius: 14px; padding: 15px 17px 16px; }
.fit-box h4 { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; margin-bottom: 8px; }
.fit-box h4::before { content: ""; width: 6px; height: 6px; border-radius: 50%; flex: none; }
.fit-box ul { list-style: none; display: grid; gap: 5px; }
.fit-box li { position: relative; padding-left: 13px; font-size: 11.5px; line-height: 1.7; color: var(--text-2); }
.fit-box li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 1px;
  background: currentColor;
  opacity: 0.35;
}
.fit-yes { border-color: #DCEDE5; background: linear-gradient(180deg, #F6FBF9, #FFFFFF 60%); }
.fit-yes h4 { color: var(--mint); }
.fit-yes h4::before { background: var(--mint); }
.fit-no { border-color: #F3E0E0; background: linear-gradient(180deg, #FDF8F8, #FFFFFF 60%); }
.fit-no h4 { color: #C0393E; }
.fit-no h4::before { background: #C0393E; }

.guide-faq { margin-top: 26px; }
.gf-title { font-size: 13px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 8px; }
.gf-item { border-bottom: 1px solid var(--line); }
.gf-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 2px;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--text);
  transition: color 0.18s;
}
.gf-item summary::-webkit-details-marker { display: none; }
.gf-item summary:hover { color: var(--accent); }
.gf-ico { position: relative; width: 11px; height: 11px; flex: none; opacity: 0.45; }
.gf-ico::before, .gf-ico::after { content: ""; position: absolute; background: currentColor; border-radius: 1px; }
.gf-ico::before { left: 0; top: 4.8px; width: 11px; height: 1.4px; }
.gf-ico::after { left: 4.8px; top: 0; width: 1.4px; height: 11px; transition: transform 0.22s var(--ease), opacity 0.22s; }
.gf-item[open] .gf-ico::after { transform: rotate(90deg); opacity: 0; }
.gf-item p { padding: 0 2px 14px; max-width: 94%; font-size: 12px; line-height: 1.85; color: var(--text-2); }

/* ---------- 效果展示 ---------- */
.show-wrap { margin-top: 56px; }
.show-tabs {
  position: relative;
  display: flex;
  gap: 2px;
  margin-top: 15px;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}
.show-tabs::-webkit-scrollbar { display: none; }
.show-tab {
  position: relative;
  flex: none;
  border: 0;
  background: transparent;
  padding: 8px 13px 11px;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--text-3);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.18s;
}
.show-tab:hover { color: var(--text-2); }
.show-tab.active { color: var(--text); }
.show-ink {
  position: absolute;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  border-radius: 2px;
  transition: left 0.3s var(--ease), width 0.3s var(--ease);
}
.show-stage { margin-top: 16px; }
.show-pane { animation: showIn 0.34s var(--ease); }
@keyframes showIn {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}
.show-doc {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 21px 24px 17px;
  box-shadow: 0 1px 2px rgba(20, 20, 26, 0.03), 0 22px 48px -36px rgba(20, 20, 26, 0.32);
}
.sd-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 13px;
  border-bottom: 1px dashed var(--line-2);
}
.sd-kicker { font-size: 10.5px; letter-spacing: 0.06em; color: var(--text-3); }
.sd-head h3 {
  margin-top: 5px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.5;
  color: var(--text);
}
.sd-badge {
  flex: none;
  font-size: 10.5px;
  color: #5646BE;
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.sd-chapters { list-style: none; margin-top: 4px; }
.sd-chapters li {
  display: grid;
  grid-template-columns: 1fr 42px;
  gap: 2px 10px;
  padding: 10px 0;
  border-bottom: 1px solid #F5F5F8;
}
.sd-chapters li:last-child { border-bottom: 0; }
.sd-chapters b { font-size: 12.5px; font-weight: 650; color: var(--text); }
.sd-chapters i { font-style: normal; font-size: 11px; color: var(--text-3); text-align: right; font-variant-numeric: tabular-nums; }
.sd-chapters span { grid-column: 1 / -1; font-size: 11.5px; line-height: 1.7; color: var(--text-3); }
.sd-foot { display: flex; flex-wrap: wrap; gap: 7px; padding-top: 12px; border-top: 1px solid var(--line); }
.sd-foot span {
  font-size: 10.5px;
  color: var(--text-2);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 3px 9px;
}

.sd-routes { display: grid; gap: 9px; margin-top: 13px; }
.sd-route { border: 1px solid var(--line); border-radius: 13px; padding: 13px 15px; background: var(--card-2); }
.sd-route.primary { border-color: var(--primary-border); background: linear-gradient(180deg, #FAF9FF, #FFFFFF 70%); }
.sr-top { display: flex; align-items: center; gap: 8px; }
.sr-tag { flex: none; font-size: 10px; font-weight: 600; color: var(--text-2); background: #EFEFF3; border-radius: 6px; padding: 2px 7px; }
.sd-route.primary .sr-tag { background: var(--accent); color: #fff; }
.sr-top b { font-size: 12.5px; font-weight: 650; }
.sd-route p { margin-top: 7px; font-size: 11.5px; line-height: 1.75; color: var(--text-2); }
.sr-meta { display: flex; gap: 15px; margin-top: 9px; font-size: 10.5px; color: var(--text-3); }
.sr-meta span { position: relative; }
.sr-meta span + span::before { content: "·"; position: absolute; left: -9px; color: #D2D2DC; }
.sd-tip { margin-top: 12px; font-size: 11px; line-height: 1.7; color: var(--text-3); }

.sd-table { margin-top: 11px; }
.st-row {
  display: grid;
  grid-template-columns: 1.1fr 0.6fr 1.5fr;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #F5F5F8;
  font-size: 11.5px;
  color: var(--text-2);
}
.st-row:last-child { border-bottom: 0; }
.st-row span:first-child { color: var(--text); font-weight: 550; }
.st-row span:nth-child(2) { color: var(--mint); font-weight: 600; font-variant-numeric: tabular-nums; }
.st-row span:nth-child(3) { color: var(--text-3); font-size: 11px; line-height: 1.6; }
.st-head { border-bottom: 1px solid var(--line-2); padding: 6px 0 8px; }
.st-head span, .st-head span:nth-child(2) { color: var(--text-3); font-weight: 500; font-size: 10.5px; letter-spacing: 0.04em; }

.sd-slides { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 20px; margin-top: 13px; }
.sd-slides li { display: flex; gap: 9px; align-items: flex-start; font-size: 11.5px; line-height: 1.7; color: var(--text-2); }
.sd-slides b {
  flex: none;
  font-size: 9.5px;
  font-weight: 600;
  color: #6B4EFF;
  background: var(--accent-soft);
  border-radius: 5px;
  padding: 2px 5px;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.show-note { margin-top: 13px; font-size: 11px; line-height: 1.7; color: var(--text-3); }

/* ---------- 微信扫码 ---------- */
.qr-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 316px;
  padding: 0 1px 11px;
  margin-bottom: 13px;
  border-bottom: 1px solid var(--line);
}
.qr-wx {
  flex: none;
  width: 31px;
  height: 31px;
  border-radius: 9px;
  background: #E9F8F1;
  color: #12A05C;
  display: grid;
  place-items: center;
}
.qr-wx svg { width: 19px; height: 19px; }
.qr-brand-txt { display: flex; flex-direction: column; min-width: 0; }
.qr-brand-txt b { font-size: 12.5px; font-weight: 650; letter-spacing: -0.01em; }
.qr-brand-txt i { font-style: normal; font-size: 10.5px; line-height: 1.4; color: var(--text-3); margin-top: 1px; }
.qr-mode {
  flex: none;
  margin-left: auto;
  font-size: 10px;
  font-weight: 550;
  color: var(--mint);
  background: var(--mint-soft);
  border-radius: 999px;
  padding: 2px 8px;
}
.qr-mode.is-fallback { color: var(--orange); background: var(--orange-soft); }
.qr-frame #qrImg { width: 100%; height: 100%; object-fit: contain; display: block; border-radius: 4px; }
.qr-scan-line {
  position: absolute;
  left: 2px;
  right: 2px;
  top: 8%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(107, 78, 255, 0), rgba(107, 78, 255, 0.85), rgba(107, 78, 255, 0));
  animation: qrScan 2.8s var(--ease) infinite;
  pointer-events: none;
}
@keyframes qrScan {
  0% { top: 8%; opacity: 0; }
  16% { opacity: 0.9; }
  84% { opacity: 0.9; }
  100% { top: 90%; opacity: 0; }
}
.qr-fallback {
  margin: 10px auto 0;
  max-width: 300px;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--orange-soft);
  font-size: 11px;
  line-height: 1.65;
  color: #A45C05;
  text-align: left;
}
.qr-mp-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 11px;
  font-size: 11px;
  color: var(--accent);
  text-decoration: none;
}
.qr-mp-link svg { width: 11px; height: 11px; }
.qr-mp-link:hover { text-decoration: underline; }

@media (max-width: 720px) {
  .guide-grid, .guide-fit { grid-template-columns: 1fr; }
  .sd-slides { grid-template-columns: 1fr; }
  .show-doc { padding: 17px 16px 14px; border-radius: 15px; }
  .sd-head { flex-direction: column; gap: 8px; }
  .sd-head h3 { font-size: 14.5px; }
  .st-row { grid-template-columns: 1fr 0.55fr; }
  .st-row span:nth-child(3) { grid-column: 1 / -1; }
  .st-head span:nth-child(3) { display: none; }
  .guide-wrap { margin-top: 40px; }
  .show-wrap { margin-top: 44px; }
  .qr-brand { max-width: 100%; }
}

/* 扫码面板微调：说明文字居中、品牌行与二维码同宽 */
.qr-brand { max-width: 300px; }
.qr-note { text-align: center; margin-left: auto; margin-right: auto; }
.qr-fallback { text-align: center; }
.qr-steps { padding-left: 0; }

/* ===================================================
   V5：科技感呼吸光效 + AI 数据处理动画
   =================================================== */

/* ---------- 顶栏流光 ---------- */
.topbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, rgba(107, 78, 255, 0) 0%, rgba(107, 78, 255, 0.6) 26%, rgba(53, 224, 176, 0.6) 56%, rgba(107, 78, 255, 0) 100%);
  background-size: 240% 100%;
  opacity: 0.55;
  pointer-events: none;
  animation: barSweep 9s ease-in-out infinite;
}
@keyframes barSweep {
  0%, 100% { background-position: 0% 0; opacity: 0.4; }
  50% { background-position: 100% 0; opacity: 0.85; }
}

/* ---------- HERO 两列 ---------- */
.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 336px;
  gap: 34px;
  align-items: center;
  text-align: left;
  margin-bottom: 30px;
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  border-radius: 50%;
  pointer-events: none;
}
.hero::before {
  width: 380px;
  height: 380px;
  left: -150px;
  top: -170px;
  background: radial-gradient(circle, rgba(107, 78, 255, 0.13), rgba(107, 78, 255, 0) 66%);
  animation: glowA 12s ease-in-out infinite;
}
.hero::after {
  width: 330px;
  height: 330px;
  right: -120px;
  bottom: -170px;
  background: radial-gradient(circle, rgba(53, 224, 176, 0.12), rgba(53, 224, 176, 0) 66%);
  animation: glowB 15s ease-in-out infinite;
}
@keyframes glowA {
  0%, 100% { opacity: 0.5; transform: scale(0.94); }
  50% { opacity: 1; transform: scale(1.08); }
}
@keyframes glowB {
  0%, 100% { opacity: 0.9; transform: scale(1.06); }
  50% { opacity: 0.4; transform: scale(0.92); }
}

.hero-copy { position: relative; z-index: 1; min-width: 0; }
.hero .hero-kicker { margin: 0 0 14px; }
.hero h1 { margin: 0 0 13px; }
.hero .hero-sub { margin: 0; max-width: 100%; }

/* 呼吸：状态点 */
.hk-dot { animation: hkBreath 3.6s ease-in-out infinite; }
@keyframes hkBreath {
  0%, 100% {
    background: #15A06B;
    box-shadow: 0 0 0 3px rgba(15, 138, 95, 0.12);
  }
  50% {
    background: #3ED9A6;
    box-shadow: 0 0 0 5px rgba(62, 217, 166, 0.16), 0 0 14px 2px rgba(62, 217, 166, 0.38);
  }
}

/* 呼吸：标题高亮带变色（紫 ↔ 青） */
@property --em-a {
  syntax: "<color>";
  inherits: false;
  initial-value: rgba(107, 78, 255, 0.2);
}
@property --em-b {
  syntax: "<color>";
  inherits: false;
  initial-value: rgba(53, 224, 176, 0.18);
}
.hero h1 .em {
  padding: 0 3px;
  background:
    linear-gradient(90deg, rgba(107, 78, 255, 0.5), rgba(53, 224, 176, 0.55)) left bottom / 100% 2px no-repeat,
    linear-gradient(90deg, var(--em-a), var(--em-b) 52%, var(--em-a)) left bottom / 100% 20% no-repeat;
  animation: emBreath 7.5s ease-in-out infinite;
}
@keyframes emBreath {
  0%, 100% { --em-a: rgba(107, 78, 255, 0.17); --em-b: rgba(53, 224, 176, 0.13); }
  50% { --em-a: rgba(53, 224, 176, 0.16); --em-b: rgba(107, 78, 255, 0.19); }
}

/* ---------- AI 数据处理面板 ---------- */
.aideck {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-radius: 18px;
  padding: 12px 12px 0;
  background: radial-gradient(120% 92% at 50% 0%, #221E3B 0%, #151324 48%, #100E18 100%);
  border: 1px solid rgba(124, 92, 255, 0.3);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 30px 56px -34px rgba(29, 10, 86, 0.62);
  animation: deckGlow 8s ease-in-out infinite;
}
@keyframes deckGlow {
  0%, 100% { border-color: rgba(124, 92, 255, 0.26); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 30px 56px -34px rgba(29, 10, 86, 0.6); }
  50% { border-color: rgba(53, 224, 176, 0.4); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 30px 60px -32px rgba(10, 122, 92, 0.5); }
}

/* 扫描光带 */
.aideck::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 72px;
  z-index: 4;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(124, 92, 255, 0) 0%, rgba(124, 92, 255, 0.09) 58%, rgba(53, 224, 176, 0.13) 88%, rgba(53, 224, 176, 0) 100%);
  animation: deckScan 5.8s cubic-bezier(0.55, 0, 0.45, 1) infinite;
}
@keyframes deckScan {
  0% { transform: translateY(-80px); opacity: 0; }
  14% { opacity: 1; }
  86% { opacity: 1; }
  100% { transform: translateY(270px); opacity: 0; }
}

.ad-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 4px 10px;
  position: relative;
  z-index: 3;
}
.ad-live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.11em;
  color: #5CE3B4;
}
.ad-live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #35E0B0;
  box-shadow: 0 0 8px #35E0B0;
  animation: adBlink 1.3s ease-in-out infinite;
}
@keyframes adBlink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.7); }
}
.ad-t {
  flex: 1;
  min-width: 0;
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ad-rate {
  flex: none;
  font-size: 9.5px;
  color: rgba(255, 255, 255, 0.38);
  font-variant-numeric: tabular-nums;
}

.ad-stage { position: relative; height: 196px; }
.ad-net { display: block; width: 100%; height: 100%; }

.ad-wires path {
  fill: none;
  stroke: url(#adWire);
  stroke-width: 1.1;
  stroke-dasharray: 5 7;
  animation: adFlow 1.4s linear infinite;
  animation-delay: var(--wd, 0s);
}
@keyframes adFlow { to { stroke-dashoffset: -24; } }

.ad-halo {
  transform-box: fill-box;
  transform-origin: center;
  animation: haloPulse 3.4s ease-in-out infinite;
}
@keyframes haloPulse {
  0%, 100% { opacity: 0.55; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.06); }
}

.ad-ring {
  fill: none;
  stroke: rgba(124, 92, 255, 0.5);
  stroke-width: 1;
  stroke-dasharray: 9 10;
  transform-box: fill-box;
  transform-origin: center;
}
.ad-ring.r1 { animation: adSpin 17s linear infinite; }
.ad-ring.r2 {
  stroke: rgba(53, 224, 176, 0.5);
  stroke-dasharray: 2 13;
  animation: adSpin 9s linear infinite reverse;
}
@keyframes adSpin { to { transform: rotate(360deg); } }

.ad-core {
  position: absolute;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.42), rgba(124, 92, 255, 0.04) 72%);
}
.ad-core b {
  position: relative;
  z-index: 2;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #F0ECFF;
  text-shadow: 0 0 12px rgba(167, 139, 255, 0.85);
}
.ad-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(140, 233, 201, 0.5);
  animation: coreRipple 2.6s ease-out infinite;
}
@keyframes coreRipple {
  0% { transform: scale(0.7); opacity: 0.85; }
  100% { transform: scale(2.2); opacity: 0; }
}

.ad-node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3.5px 7px;
  border-radius: 7px;
  white-space: nowrap;
  background: rgba(124, 92, 255, 0.13);
  border: 1px solid rgba(124, 92, 255, 0.3);
  font-size: 9.5px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.66);
  animation: nodePulse 3.4s ease-in-out infinite;
}
.ad-node b { font-weight: 500; }
.ad-node i {
  font-style: normal;
  color: #8CE9C9;
  font-variant-numeric: tabular-nums;
  transition: color 0.25s;
}
.ad-node:nth-of-type(1) { animation-delay: 0s; }
.ad-node:nth-of-type(2) { animation-delay: 0.5s; }
.ad-node:nth-of-type(3) { animation-delay: 0.9s; }
.ad-node:nth-of-type(4) { animation-delay: 1.4s; }
.ad-node:nth-of-type(5) { animation-delay: 1.9s; }
@keyframes nodePulse {
  0%, 100% { border-color: rgba(124, 92, 255, 0.26); box-shadow: 0 0 0 0 rgba(124, 92, 255, 0); }
  50% { border-color: rgba(53, 224, 176, 0.55); box-shadow: 0 0 16px -3px rgba(53, 224, 176, 0.45); }
}

.ad-log {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  margin: 0 -12px;
  padding: 0 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.028);
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.5);
}
.ad-log-l { flex: none; color: #35E0B0; font-weight: 700; }
.ad-log-t {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ad-log-t.in { animation: adLogIn 0.34s var(--ease); }
@keyframes adLogIn {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}

.ad-bar {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 8%;
  z-index: 5;
  background: linear-gradient(90deg, rgba(124, 92, 255, 0), #7C5CFF 45%, #35E0B0);
  animation: adBar 4.6s ease-in-out infinite;
}
@keyframes adBar {
  0% { width: 6%; opacity: 0.35; }
  50% { width: 78%; opacity: 1; }
  100% { width: 6%; opacity: 0.35; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 22px;
    text-align: center;
  }
  .hero .hero-kicker { margin-left: auto; margin-right: auto; }
  .hero .hero-sub { margin: 0 auto; max-width: 560px; }
  .aideck { display: none; }
}

/* ---------- 尊重系统减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .topbar::after,
  .hero::before,
  .hero::after,
  .hk-dot,
  .hero h1 .em,
  .aideck,
  .aideck::after,
  .ad-live i,
  .ad-wires path,
  .ad-halo,
  .ad-ring,
  .ad-pulse,
  .ad-node,
  #briefForm::after,
  .ad-bar {
    animation: none !important;
  }
}

/* ---------- 表单卡片：极淡呼吸光晕 ---------- */
#briefForm { position: relative; }
#briefForm::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(107, 78, 255, 0.1), 0 0 36px -14px rgba(53, 224, 176, 0.26);
  opacity: 0.55;
  animation: cardBreath 9s ease-in-out infinite;
}
@keyframes cardBreath {
  0%, 100% { opacity: 0.4; box-shadow: 0 0 0 1px rgba(107, 78, 255, 0.1), 0 0 32px -14px rgba(107, 78, 255, 0.22); }
  50% { opacity: 0.8; box-shadow: 0 0 0 1px rgba(53, 224, 176, 0.16), 0 0 42px -12px rgba(53, 224, 176, 0.28); }
}
.ad-node { font-size: 10px; padding: 3.5px 7.5px; }

/* 窄屏关闭呼吸光斑，减少绘制开销 */
@media (max-width: 980px) {
  .hero::before, .hero::after { display: none; }
}

/* sticky 顶栏修复：clip 不建立滚动容器，避免顶栏随页面滚走 */
body { overflow-x: clip; }

/* ===================================================
   V6：万能体验账号入口（登录弹窗 · 密码页签）
   =================================================== */
.demo-box {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 10px;
  margin: 0 0 16px;
  padding: 11px 12px 10px;
  border: 1px dashed rgba(107, 78, 255, 0.34);
  border-radius: 12px;
  background: linear-gradient(180deg, #F8F6FF, #FFFFFF 78%);
}
.demo-main { display: flex; align-items: center; gap: 8px; min-width: 0; }
.demo-tag {
  flex: none;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.02em;
  color: #5646BE;
  background: rgba(107, 78, 255, 0.12);
  border-radius: 6px;
  padding: 2px 7px;
}
.demo-cred { display: flex; align-items: center; gap: 5px; min-width: 0; font-size: 12px; }
.demo-cred b {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
}
.demo-cred i { font-style: normal; color: #C9C6DA; }
.demo-go {
  flex: none;
  border: 0;
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 11.5px;
  font-weight: 600;
  color: #fff;
  background: var(--ink, #17161D);
  cursor: pointer;
  transition: opacity 0.18s, transform 0.18s;
}
.demo-go:hover { opacity: 0.88; }
.demo-go:active { transform: scale(0.97); }
.demo-go:disabled { opacity: 0.5; cursor: default; }
.demo-note,
.demo-consent {
  grid-column: 1 / -1;
  font-size: 10.5px;
  line-height: 1.6;
  color: var(--text-3);
}
.demo-note { margin-top: 3px; }
.demo-consent { margin-top: -1px; color: #A9A6B8; }
.demo-consent a { color: #6B7BD6; text-decoration: none; }
.demo-consent a:hover { text-decoration: underline; }

@media (max-width: 420px) {
  .demo-box { grid-template-columns: 1fr; }
  .demo-go { width: 100%; margin-top: 6px; }
}
.demo-box[hidden] { display: none; }

.demo-jump {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 8px 10px;
  border: 1px dashed rgba(107, 78, 255, 0.34);
  border-radius: 9px;
  background: rgba(107, 78, 255, 0.05);
  font-size: 11.5px;
  font-weight: 550;
  color: #5646BE;
  cursor: pointer;
  transition: background 0.18s, border-color 0.18s;
}
.demo-jump:hover { background: rgba(107, 78, 255, 0.1); border-color: rgba(107, 78, 255, 0.5); }
.demo-jump[hidden] { display: none; }

/* ===================================================
   V7：HERO 右侧改为「空灵球体」——无卡片、无边框，融入页面底色
   =================================================== */
.hero {
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 22px;
}

.orb {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  isolation: isolate;
}

/* 两团极淡的光雾，让圆形边界彻底化开 */
.orb::before,
.orb::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.orb::before {
  inset: -7%;
  background: radial-gradient(circle at 50% 48%, rgba(124, 92, 255, 0.1), rgba(124, 92, 255, 0.028) 44%, rgba(124, 92, 255, 0) 70%);
  animation: orbWashA 13s ease-in-out infinite;
}
.orb::after {
  inset: 12%;
  background: radial-gradient(circle at 56% 58%, rgba(43, 200, 160, 0.08), rgba(43, 200, 160, 0) 58%);
  animation: orbWashB 17s ease-in-out infinite;
}
@keyframes orbWashA {
  0%, 100% { opacity: 0.72; transform: scale(0.97); }
  50% { opacity: 1; transform: scale(1.05); }
}
@keyframes orbWashB {
  0%, 100% { opacity: 1; transform: scale(1.04) translate(0, 0); }
  50% { opacity: 0.55; transform: scale(0.96) translate(1%, -1%); }
}

.orb-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  z-index: 1;
}

/* ---------- 环 ---------- */
.orb-ring {
  fill: none;
  stroke-width: 1;
  transform-box: view-box;
  transform-origin: 50% 50%;
}
.orb-ring.faint { stroke: rgba(23, 22, 29, 0.1); }
.orb-ring.arc {
  stroke: url(#orbArc);
  stroke-width: 1.4;
  stroke-dasharray: 232 823;
  stroke-linecap: round;
  filter: drop-shadow(0 0 3px rgba(124, 92, 255, 0.25));
}
.orb-ring.dash {
  stroke: rgba(124, 92, 255, 0.24);
  stroke-dasharray: 2 10;
  stroke-linecap: round;
}
.orb-ring.tick {
  stroke: rgba(124, 92, 255, 0.14);
  stroke-dasharray: 1 8;
  stroke-linecap: round;
}
.orb-ring.dots {
  stroke: rgba(23, 22, 29, 0.12);
  stroke-dasharray: 1 14;
  stroke-linecap: round;
}
.orb-ring.mint {
  stroke: rgba(43, 200, 160, 0.3);
  stroke-dasharray: 3 9;
  stroke-linecap: round;
}
.spin-a { animation: orbSpin 54s linear infinite; }
.spin-b { animation: orbSpin 34s linear infinite reverse; }
.spin-c { animation: orbSpin 22s linear infinite; }
.spin-arc { animation: orbSpin 68s linear infinite; }
@keyframes orbSpin { to { transform: rotate(360deg); } }

/* ---------- 数据流 ---------- */
.orb-wires use {
  fill: none;
  stroke: url(#orbWire);
  stroke-width: 1.15;
  stroke-dasharray: 4 7;
  stroke-linecap: round;
  animation: orbFlow 3.6s linear infinite;
}
@keyframes orbFlow { to { stroke-dashoffset: -20; } }

/* ---------- 核心 ---------- */
.orb-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 84px;
  height: 84px;
  margin: -42px 0 0 -42px;
  z-index: 3;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 30%, #FFFFFF 0%, rgba(251, 249, 255, 0.94) 40%, rgba(242, 238, 255, 0.6) 72%, rgba(238, 233, 255, 0.1) 100%);
  box-shadow:
    0 0 0 1px rgba(124, 92, 255, 0.1),
    0 0 30px -6px rgba(140, 118, 255, 0.35),
    0 18px 38px -22px rgba(84, 60, 214, 0.62),
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -8px 18px -12px rgba(124, 92, 255, 0.5);
}
.orb-core::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(140, 118, 255, 0.16), rgba(140, 118, 255, 0.04) 56%, rgba(140, 118, 255, 0) 72%);
  animation: coreAura 7s ease-in-out infinite;
}
@keyframes coreAura {
  0%, 100% { opacity: 0.7; transform: scale(0.98); }
  50% { opacity: 1; transform: scale(1.06); }
}
.orb-core b {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-indent: 0.11em;
  background: linear-gradient(140deg, #4B3BD6 0%, #7C5CFF 52%, #17A877 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.orb-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(124, 92, 255, 0.22);
  animation: orbRipple 5s cubic-bezier(0.2, 0.6, 0.3, 1) infinite;
}
.orb-pulse.d {
  border-color: rgba(43, 200, 160, 0.2);
  animation-delay: 2.4s;
}
@keyframes orbRipple {
  0% { transform: scale(0.94); opacity: 0.55; }
  70% { opacity: 0.12; }
  100% { transform: scale(2.15); opacity: 0; }
}

/* ---------- 漂浮标签 ---------- */
.orb-node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  z-index: 2;
  font-size: 11.5px;
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: rgba(23, 22, 29, 0.64);
  animation: orbNode 6.5s ease-in-out infinite;
}
.orb-node em {
  width: 4px;
  height: 4px;
  flex: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #7C5CFF, #2BC8A0);
  box-shadow: 0 0 7px rgba(124, 92, 255, 0.45);
}
.orb-node i {
  font-style: normal;
  margin-left: 3px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
  color: #5B4BD1;
  font-variant-numeric: tabular-nums;
}
.orb-node:nth-of-type(1) { animation-delay: 0s; }
.orb-node:nth-of-type(2) { animation-delay: 1.1s; }
.orb-node:nth-of-type(3) { animation-delay: 2.2s; }
.orb-node:nth-of-type(4) { animation-delay: 3.1s; }
.orb-node:nth-of-type(5) { animation-delay: 4s; }
@keyframes orbNode {
  0%, 100% { opacity: 0.86; }
  50% { opacity: 1; }
}

/* ---------- 顶部状态 / 底部日志 ---------- */
.orb-cap {
  position: absolute;
  left: 50%;
  top: -2.2%;
  transform: translateX(-50%);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  font-size: 9px;
  letter-spacing: 0.17em;
  color: rgba(23, 22, 29, 0.34);
}
.orb-cap i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #2BC8A0;
  box-shadow: 0 0 7px rgba(43, 200, 160, 0.8);
  animation: hkBreath 3.6s ease-in-out infinite;
}
.orb-log {
  position: absolute;
  left: 50%;
  bottom: 5.5%;
  transform: translateX(-50%);
  z-index: 2;
  max-width: 82%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 9.5px;
  letter-spacing: 0.01em;
  color: rgba(23, 22, 29, 0.3);
}
.orb-log::before {
  content: "› ";
  color: rgba(43, 200, 160, 0.7);
}
.orb-log.in { animation: orbLogIn 0.5s var(--ease); }
@keyframes orbLogIn {
  from { opacity: 0; transform: translateX(-50%) translateY(5px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ---------- 中等宽度：右栏收窄，避免光雾贴边 ---------- */
@media (max-width: 1180px) {
  .hero { grid-template-columns: minmax(0, 1fr) 336px; gap: 18px; }
  .orb { max-width: 336px; }
}

/* ---------- 移动端：球体保留，按屏宽缩放 ---------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 14px; }
  /* 球体放大一点，六位数字才有呼吸感 */
  .orb {
    width: min(88vw, 344px);
    margin: 20px auto 6px;
  }
  .orb-core {
    width: 78px;
    height: 78px;
    margin: -39px 0 0 -39px;
  }
  .orb-core b { font-size: 12px; letter-spacing: 0.10em; text-indent: 0.10em; }
  .orb-node { font-size: 11px; }
  .orb-node i { font-size: 10.5px; }
  .orb-cap { font-size: 9px; letter-spacing: 0.14em; top: -2.5%; }
  .orb-log { font-size: 9.5px; bottom: 4%; }
}
@media (max-width: 380px) {
  .orb { width: min(92vw, 340px); }
  .orb-node { font-size: 10.5px; }
  .orb-node i { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .orb::before, .orb::after, .orb-ring, .orb-wires use, .orb-core b, .orb-core::before,
  .orb-pulse, .orb-node, .orb-cap i, .orb-log.in {
    animation: none !important;
  }
}

/* ===================================================
   V8：增值交付（生成目录后 · 可多选 · 价格联动）
   =================================================== */
.upsell { margin-top: 4px; }

.upsell-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.upsell-head h4 { margin: 0; }

.upsell-tip {
  font-size: 11.5px;
  color: var(--accent);
  background: rgba(107, 78, 255, 0.08);
  border-radius: 999px;
  padding: 2px 9px;
  letter-spacing: 0.01em;
}

.upsell-desc {
  margin: 6px 0 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-2);
}

.up-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.up-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 13px 12px 14px;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--card-2);
  cursor: pointer;
  transition: border-color .18s, background .18s, box-shadow .18s, transform .18s;
}

.up-card:hover { border-color: rgba(107, 78, 255, 0.42); transform: translateY(-1px); }

.up-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.up-check {
  flex: none;
  width: 17px;
  height: 17px;
  margin-top: 1px;
  border-radius: 6px;
  border: 1.5px solid var(--line-2);
  background: #fff;
  position: relative;
  transition: all .18s;
}

.up-check::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid #fff;
  border-width: 0 1.6px 1.6px 0;
  transform: rotate(42deg) scale(0.6);
  opacity: 0;
  transition: all .16s;
}

.up-card.on {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(107, 78, 255, 0.07), rgba(107, 78, 255, 0.02));
  box-shadow: 0 2px 12px rgba(107, 78, 255, 0.12);
}

.up-card.on .up-check {
  border-color: var(--accent);
  background: var(--accent);
}

.up-card.on .up-check::after { opacity: 1; transform: rotate(42deg) scale(1); }

.up-main {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  padding-right: 46px;
}

.up-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.up-desc {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-2);
}

.up-price {
  position: absolute;
  right: 12px;
  top: 11px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-variant-numeric: tabular-nums;
}

.up-price s {
  font-size: 10.5px;
  color: var(--text-3);
}

.up-price b {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.up-foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  color: var(--text-2);
}

.up-foot b {
  font-size: 13px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.up-total b {
  font-size: 16px;
  color: var(--accent);
  letter-spacing: -0.02em;
}

@media (max-width: 980px) {
  .up-grid { grid-template-columns: 1fr; gap: 8px; }
  .up-card { padding: 11px 12px; }
  .up-main { padding-right: 54px; }
  .up-foot { flex-wrap: wrap; gap: 6px; }
}

/* ===================================================
   V9：顶栏胶囊导航 · 更多设置常显 · 站内导航带
   =================================================== */

/* ---------- 顶栏：胶囊分段导航 ---------- */
.tb-nav {
  gap: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 13px;
  box-shadow: none;
}

.tb-pills {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid #E5E5EE;
  background: #F1F1F7;
  box-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(20, 20, 26, 0.04);
}

.tb-pills a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-2);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.tb-pills a:hover { color: var(--text); background: #fff; box-shadow: 0 1px 3px rgba(20, 20, 26, 0.08); }

.tb-pills a.is-on {
  color: #fff;
  background: linear-gradient(135deg, #6B4EFF 0%, #4B3BD6 100%);
  box-shadow: 0 8px 18px -10px rgba(107, 78, 255, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.26);
}

.tb-div { display: none; }

.tb-nav .tb-user {
  height: 30px;
  padding: 0 15px;
  border: 0;
  background: var(--primary);
  color: #fff;
  font-size: 12.5px;
  box-shadow: 0 6px 14px -10px rgba(20, 20, 26, 0.95);
}
.tb-nav .tb-user:hover { background: #000; }
.tb-nav .tb-user.logged { background: var(--accent); }
.tb-nav .tb-user.logged:hover { background: #5A3FF0; }

/* ---------- 侧栏站内导航（仅手机抽屉里出现） ---------- */
.rail-nav { display: none; }

.rail-nav-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-top: 9px; }

.rail-nav-grid a {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text);
  transition: border-color 0.18s, background 0.18s;
}

.rail-nav-grid a:hover { border-color: var(--primary-border); background: #FCFBFF; }

.rail-nav-grid a i {
  font-style: normal;
  font-size: 10px;
  font-weight: 400;
  color: var(--text-3);
  letter-spacing: -0.01em;
}

/* ---------- 更多设置：常显区块 ---------- */
.advanced {
  margin: 20px 0 0;
  padding: 0 18px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, #FBFBFD 0%, #FFFFFF 48%);
  overflow: hidden;
}

.adv-head {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 15px 0 14px;
  border-bottom: 1px dashed var(--line-2);
}

.adv-badge {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: var(--accent-soft);
}

.adv-badge svg { width: 17px; height: 17px; }

.adv-tit { min-width: 0; }
.adv-tit h3 { font-size: 14px; font-weight: 600; letter-spacing: -0.01em; color: var(--text); }
.adv-tit p { font-size: 11.5px; color: var(--text-3); margin-top: 2px; }

.adv-opt {
  margin-left: auto;
  flex: none;
  font-size: 11px;
  color: var(--text-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  background: #fff;
}

.advanced .adv-body { padding: 6px 0 0; border-top: 0; }

/* ---------- 站内导航带 ---------- */
.more-band {
  position: relative;
  margin: 42px 0 0;
  padding: 26px 22px 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(158deg, #FAF9FF 0%, #FFFFFF 52%, #FBFBFE 100%);
  overflow: hidden;
}

.more-band::before,
.more-band::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(6px);
}
.more-band::before {
  width: 220px;
  height: 220px;
  right: -70px;
  top: -90px;
  background: radial-gradient(circle, rgba(107, 78, 255, 0.14), transparent 68%);
}
.more-band::after {
  width: 180px;
  height: 180px;
  left: -60px;
  bottom: -80px;
  background: radial-gradient(circle, rgba(43, 200, 160, 0.12), transparent 68%);
}

.mb-head { position: relative; }

.mb-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--text-3);
}
.mb-kicker span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(107, 78, 255, 0.12);
}

.mb-head h2 { font-size: 20px; margin-top: 9px; letter-spacing: -0.02em; }

.mb-sub { font-size: 12.5px; line-height: 1.75; color: var(--text-2); margin-top: 7px; max-width: 560px; }

.mb-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.mb-card {
  position: relative;
  display: block;
  padding: 13px 16px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.mb-card:hover {
  border-color: var(--primary-border);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -26px rgba(20, 20, 26, 0.6);
}

.mb-no { font-size: 10px; letter-spacing: 0.14em; color: var(--text-3); font-variant-numeric: tabular-nums; }

.mb-card b { display: block; font-size: 14px; font-weight: 600; margin-top: 4px; letter-spacing: -0.01em; }

.mb-card i {
  display: block;
  font-style: normal;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--text-2);
  margin-top: 3px;
  padding-right: 26px;
}

.mb-go {
  position: absolute;
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #F4F4F9;
  color: var(--text-3);
  transition: all 0.22s var(--ease);
}
.mb-go svg { width: 13px; height: 13px; }
.mb-card:hover .mb-go { background: var(--accent-soft); color: var(--accent); transform: translateY(-50%) translateX(2px); }

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .tb-pills a { padding: 0 11px; font-size: 12.5px; }
  .tb-nav .tb-user { padding: 0 12px; }
  .tb-div { margin: 0 6px; }
}

@media (max-width: 900px) {
  .tb-nav { padding: 0; border: 0; background: transparent; box-shadow: none; }
  .tb-pills { display: none; }
  .tb-div { display: none; }
  .rail-nav { display: block; padding: 14px 14px 10px; border-bottom: 1px solid var(--line); }
  .more-band { margin-top: 34px; padding: 22px 16px 18px; border-radius: 18px; }
  .mb-head h2 { font-size: 18px; }
}

@media (max-width: 620px) {
  .mb-grid { grid-template-columns: 1fr; gap: 8px; }
  .mb-card { padding: 12px 14px 13px; }
  .advanced { padding: 0 14px 14px; border-radius: 16px; margin-top: 16px; }
  .adv-opt { display: none; }
  .adv-tit h3 { font-size: 13.5px; }
  .adv-tit p { font-size: 11px; }
  .adv-badge { width: 30px; height: 30px; border-radius: 10px; }
}

/* ===================================================
   V10：报价页与收银台的状态修正
   =================================================== */
.pay-block-err {
  margin: 10px 0 0;
  padding: 10px 13px;
  border: 1px solid #F3D2D2;
  border-radius: 12px;
  background: #FDF3F3;
  color: #A3262B;
  font-size: 12.5px;
  line-height: 1.65;
}

.pay-make-note {
  margin: 9px 0 0;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--text-3);
}

/* 收银台错误态：错误提示以上区域隐藏时，必须真的不占位 */
.pay-modal .qr-box[hidden],
.pay-modal .pay-tabs[hidden],
.pay-modal .qr-jump[hidden] { display: none !important; }

/* 表单错误提示与上传区贴合 */
#docErr { margin-top: 8px; }

.pay-ai-note {
  margin: 10px 0 0;
  font-size: 11px;
  line-height: 1.7;
  color: var(--text-3);
}
.pay-ai-note a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

/* 手机上主按钮独占一行，次要操作并排，避免“返回修改”被挤成两行 */
@media (max-width: 640px) {
  .result-actions { gap: 8px; }
  .result-actions .btn-pay {
    order: 1;
    flex: 1 1 100%;
    height: 46px;
    justify-content: center;
  }
  .result-actions .btn-ghost { order: 2; flex: 1 1 calc(50% - 4px); height: 40px; white-space: nowrap; }
  .result-actions .link-copy { order: 3; flex: 0 0 auto; margin-left: 0; }
  .result-actions .copy-tip { order: 4; flex: 1 1 100%; margin-left: 0; }
  .pay-make-note { font-size: 11px; }
}

/* 收银台错误态：收掉二维码框与金额，只留一句“未扣款” */
.pay-card.is-error .qr-frame,
.pay-card.is-error .pay-total,
.pay-card.is-error .pay-claim { display: none !important; }
.pay-card.is-error .pay-scan { display: flex; flex-direction: column; justify-content: center; }
.pay-card.is-error .qr-hint { font-size: 13px; color: var(--text-2); }
.pay-card.is-error .pay-side { opacity: 0.9; }

/* 收银台错误面板：整块替换支付区，避免残留空二维码与 ¥0 */
.pay-card.is-error .pay-grid { display: none !important; }
.pay-card.is-error .pay-foot { display: none !important; }

.pay-errbox {
  margin: 6px 0 18px;
  padding: 26px 22px 22px;
  border: 1px solid #F0E2D4;
  border-radius: 16px;
  background: linear-gradient(180deg, #FFFDFA 0%, #FFF9F3 100%);
  text-align: center;
}

.pay-errbox[hidden] { display: none !important; }

.pe-ico {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #FBE9D8;
  color: #B4722A;
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 10px;
}

.pe-t {
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  letter-spacing: -0.01em;
}

.pe-s {
  margin: 7px auto 0;
  max-width: 420px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--text-2);
}

.pe-acts {
  display: flex;
  justify-content: center;
  gap: 9px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.pe-acts .key-btn { min-width: 108px; }