/* ============================================================
   天乙灵枢官网样式 —— 深空宇宙 + 东方时序 + 高级科技感
   纯静态，无构建。配色克制，文案审核安全。
   ============================================================ */

:root {
  --bg-0: #04060e;
  --bg-1: #070b18;
  --bg-2: #0c1226;
  --panel: rgba(12, 19, 38, 0.72);
  --panel-soft: rgba(255, 255, 255, 0.035);
  --line: rgba(150, 184, 255, 0.16);
  --line-soft: rgba(150, 184, 255, 0.1);
  --text: #f3f6ff;
  --muted: #aab6d4;
  --muted-dim: #7d89a8;
  --gold: #e9c987;
  --gold-soft: #f6e4b8;
  --cyan: #7fd6ff;
  --violet: #b69cff;
  --radius: 24px;
  --radius-lg: 32px;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.45);
  --maxw: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-0);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-weight: 700;
  line-height: 1.25;
}

p { margin: 0; line-height: 1.85; }
ul { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ── 深空背景层 ── */
.starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  background:
    radial-gradient(circle at 50% -10%, rgba(70, 110, 200, 0.28), transparent 45%),
    radial-gradient(circle at 85% 12%, rgba(120, 90, 200, 0.16), transparent 38%),
    linear-gradient(180deg, #04060e 0%, #070b18 40%, #0a0f22 100%);
}

.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  animation: drift 26s ease-in-out infinite;
}

.aurora-1 {
  width: 520px; height: 520px;
  top: -160px; left: -120px;
  background: radial-gradient(circle, rgba(64, 122, 255, 0.42), transparent 70%);
}

.aurora-2 {
  width: 460px; height: 460px;
  top: 38%; right: -160px;
  background: radial-gradient(circle, rgba(170, 130, 255, 0.34), transparent 70%);
  animation-delay: -9s;
}

.aurora-3 {
  width: 420px; height: 420px;
  bottom: -180px; left: 30%;
  background: radial-gradient(circle, rgba(120, 200, 255, 0.26), transparent 70%);
  animation-delay: -16s;
}

@keyframes drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(28px, -34px, 0) scale(1.12); }
}

.grid-veil {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(150, 184, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150, 184, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
}

/* ── 布局外壳 ── */
.page-shell {
  position: relative;
  z-index: 1;
  width: min(var(--maxw), calc(100vw - 36px));
  margin: 0 auto;
  padding: 18px 0 56px;
}

/* ── 顶部导航 ── */
.site-header {
  position: sticky;
  top: 14px;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 14px 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8, 12, 24, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-icon-shell {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}

.brand-icon {
  width: 100%; height: 100%;
  object-fit: contain;
  /* 图标自带透明圆角，drop-shadow 沿其形状投影，无白底边框 */
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.5));
}

.brand-copy { display: flex; flex-direction: column; }

.brand-cn {
  font-family: "Noto Serif SC", serif;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.brand-en {
  margin-top: 2px;
  font-size: 9.5px;
  letter-spacing: 0.32em;
  color: var(--muted-dim);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

.site-nav a {
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1.5px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  transition: width 0.25s ease;
}

.site-nav a:hover { color: var(--text); }
.site-nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  margin: 0 auto;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* ── 通用按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.2s ease;
}

.btn-primary {
  color: #0a0f1e;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  box-shadow: 0 16px 36px rgba(233, 201, 135, 0.26);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
}

.btn:hover { transform: translateY(-2px); }
.btn-primary:hover { box-shadow: 0 20px 44px rgba(233, 201, 135, 0.36); }
.btn-ghost:hover { border-color: rgba(127, 214, 255, 0.5); }

/* ── 通用文字 ── */
.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

/* ── 首屏 Hero ── */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 40px;
  min-height: 78vh;
  padding: 70px 0 40px;
}

.hero-title {
  font-size: clamp(58px, 9vw, 116px);
  letter-spacing: 0.08em;
  background: linear-gradient(160deg, #fff 10%, var(--gold-soft) 55%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 10px 50px rgba(127, 170, 255, 0.18);
}

.hero-sub {
  margin-top: 14px;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(17px, 2.4vw, 24px);
  color: var(--gold-soft);
  letter-spacing: 0.04em;
}

.hero-desc {
  margin-top: 20px;
  max-width: 52ch;
  color: var(--muted);
  font-size: 15.5px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-note {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid rgba(233, 201, 135, 0.5);
  color: var(--muted-dim);
  font-size: 13px;
}

/* ── 时辰轮盘 ── */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.dial {
  position: relative;
  width: min(420px, 80vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.dial-ring { width: 100%; height: 100%; }

.dial-ring-spin { animation: spin 90s linear infinite; }

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

.dial-svg { width: 100%; height: 100%; overflow: visible; }

.dial-circle { fill: none; }
.dial-outer { stroke: rgba(127, 214, 255, 0.28); stroke-width: 1; }
.dial-mid { stroke: rgba(233, 201, 135, 0.34); stroke-width: 1; stroke-dasharray: 3 7; }
.dial-inner { stroke: rgba(182, 156, 255, 0.4); stroke-width: 1; }

.dial-ticks line { stroke: rgba(150, 184, 255, 0.35); stroke-width: 1.2; }

.dial-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.dial-label {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  border: 1px solid rgba(233, 201, 135, 0.22);
  border-radius: 50%;
  color: var(--gold-soft);
  font-family: "Noto Serif SC", serif;
  font-size: 17px;
  line-height: 1;
  background: rgba(8, 13, 26, 0.48);
  box-shadow:
    0 0 18px rgba(233, 201, 135, 0.08),
    inset 0 0 14px rgba(127, 214, 255, 0.05);
  text-shadow: 0 0 10px rgba(246, 228, 184, 0.55);
}

.dial-core {
  position: absolute;
  width: 38%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  gap: 2px;
  background: radial-gradient(circle, rgba(20, 32, 60, 0.96), rgba(8, 12, 26, 0.96));
  border: 1px solid rgba(233, 201, 135, 0.3);
  box-shadow: 0 0 50px rgba(127, 170, 255, 0.3), inset 0 0 30px rgba(127, 170, 255, 0.12);
}

.dial-core-cn {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(22px, 5vw, 34px);
  letter-spacing: 0.18em;
  color: var(--gold-soft);
}

.dial-core-en {
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--muted-dim);
}

.dial-star {
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 12px 3px rgba(255, 255, 255, 0.7);
  animation: twinkle 3.4s ease-in-out infinite;
}

.dial-star-1 { top: 6%; left: 22%; }
.dial-star-2 { bottom: 14%; right: 10%; animation-delay: -1.2s; }
.dial-star-3 { top: 44%; right: -2%; animation-delay: -2.4s; }

@keyframes twinkle {
  0%, 100% { opacity: 0.25; transform: scale(0.7); }
  50% { opacity: 1; transform: scale(1.15); }
}

.dial-caption {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted-dim);
}

/* ── 区块通用 ── */
.section {
  margin-top: 34px;
  padding: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(12, 19, 38, 0.84), rgba(8, 13, 26, 0.72));
  box-shadow: var(--shadow);
}

.section-head { max-width: 64ch; margin-bottom: 30px; }

.section-head h2 {
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.03em;
}

.section-lead {
  margin-top: 14px;
  color: var(--muted);
  font-size: 15.5px;
}

/* ── 卡片网格 ── */
.card-grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  padding: 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel-soft);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(127, 214, 255, 0.34);
  background: rgba(255, 255, 255, 0.055);
}

.card h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.card p { color: var(--muted); font-size: 14.5px; }

.card-num {
  display: inline-grid;
  place-items: center;
  width: 42px; height: 42px;
  margin-bottom: 16px;
  border-radius: 12px;
  font-family: "Noto Serif SC", serif;
  font-weight: 800;
  color: #0a0f1e;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
}

.feature h3 {
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.link-card { display: flex; flex-direction: column; }

.link-arrow {
  margin-top: 14px;
  color: var(--cyan);
  font-size: 13.5px;
  font-weight: 600;
}

/* ── 算法体系条带 ── */
.algo-band {
  margin-top: 26px;
  padding: 30px;
  border: 1px solid rgba(233, 201, 135, 0.2);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 8% 0%, rgba(233, 201, 135, 0.1), transparent 40%),
    rgba(8, 13, 26, 0.6);
}

.band-label {
  font-family: "Noto Serif SC", serif;
  font-size: 17px;
  color: var(--gold-soft);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.algo-grid { display: grid; gap: 18px; }

.algo-card {
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
}

.algo-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid rgba(127, 214, 255, 0.3);
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.algo-card h3 {
  font-size: 24px;
  margin-bottom: 10px;
  color: var(--gold-soft);
}

.algo-card p { color: var(--muted); font-size: 14px; }

.band-foot {
  margin-top: 18px;
  color: var(--muted-dim);
  font-size: 12.5px;
}

/* ── 文化背景 ── */
.culture-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.85fr;
  gap: 20px;
}

.culture-main { display: grid; gap: 16px; }

.culture-item {
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.culture-item h3 {
  font-size: 21px;
  margin-bottom: 10px;
  color: var(--gold-soft);
}

.culture-item p { color: var(--muted); font-size: 14.5px; }

.culture-side {
  padding: 26px;
  border: 1px solid rgba(127, 214, 255, 0.18);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(127, 214, 255, 0.1), transparent 50%),
    rgba(8, 13, 26, 0.6);
}

.side-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 16px;
}

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

.branch-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 14px;
  color: var(--muted);
}

.branch-list li span {
  display: grid;
  place-items: center;
  width: 28px; height: 28px;
  border-radius: 8px;
  font-family: "Noto Serif SC", serif;
  font-size: 15px;
  color: var(--gold-soft);
  background: rgba(233, 201, 135, 0.12);
  border: 1px solid rgba(233, 201, 135, 0.24);
}

.side-note {
  margin-top: 16px;
  color: var(--muted-dim);
  font-size: 12px;
}

/* ── 穴位与模型 ── */
.model-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
  align-items: center;
}

.meridian-frame {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 30%, rgba(127, 170, 255, 0.16), transparent 60%),
    rgba(6, 10, 22, 0.7);
}

.meridian-svg {
  width: 100%;
  height: auto;
}

.meridian-image {
  position: relative;
  z-index: 1;
  width: 100%;
  max-height: 560px;
  object-fit: contain;
  border-radius: 18px;
  filter:
    drop-shadow(0 0 28px rgba(127, 214, 255, 0.16))
    drop-shadow(0 18px 38px rgba(0, 0, 0, 0.34));
}

.model-caption,
.model-note {
  margin-top: 14px;
  color: var(--muted-dim);
  font-size: 12px;
  text-align: center;
}

.model-info { display: grid; gap: 14px; }

.model-feature {
  padding: 22px 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.model-feature h3 {
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--gold-soft);
}

.model-feature p { color: var(--muted); font-size: 14.5px; }

.model-note { text-align: left; }

/* ── 审核信息表 ── */
.audit-grid {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.audit-table { margin: 0; }

.audit-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--line-soft);
}

.audit-row:last-child { border-bottom: none; }

.audit-row dt {
  padding: 18px 22px;
  font-weight: 600;
  color: var(--gold-soft);
  background: rgba(255, 255, 255, 0.03);
  font-size: 14.5px;
}

.audit-row dd {
  margin: 0;
  padding: 18px 22px;
  color: var(--muted);
  font-size: 14.5px;
}

.audit-row dd a { color: var(--cyan); }
.audit-row dd a:hover { text-decoration: underline; }

/* ── 免责声明 ── */
.disclaimer-card {
  padding: 4px 0;
}

#disclaimer {
  border-color: rgba(233, 201, 135, 0.32);
  background:
    radial-gradient(circle at 0% 0%, rgba(233, 201, 135, 0.1), transparent 45%),
    linear-gradient(180deg, rgba(12, 19, 38, 0.86), rgba(8, 13, 26, 0.74));
}

.disclaimer-card h2 { margin-bottom: 18px; }

.disclaimer-list { display: grid; gap: 12px; }

.disclaimer-list li {
  position: relative;
  padding: 14px 18px 14px 42px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.disclaimer-list li::before {
  content: "※";
  position: absolute;
  left: 16px; top: 14px;
  color: var(--gold);
}

.disclaimer-list strong { color: var(--text); }

/* ── 联系我们 ── */
.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

.contact-text h2 { margin-bottom: 12px; }
.contact-text p { color: var(--muted); font-size: 15px; }

.contact-info {
  display: grid;
  gap: 12px;
}

.contact-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: var(--panel-soft);
}

.contact-key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.contact-val { font-size: 15.5px; color: var(--text); }
.contact-val a { color: var(--gold-soft); }
.contact-val a:hover { text-decoration: underline; }

/* ── 页脚 ── */
.site-footer {
  margin-top: 40px;
  padding: 38px 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(6, 10, 20, 0.95), rgba(8, 13, 24, 0.92));
  box-shadow: var(--shadow);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-brand .brand-cn { font-size: 22px; }
.footer-brand .brand-en { display: block; margin-top: 4px; }

.footer-tagline {
  margin-top: 10px;
  color: var(--muted-dim);
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--muted);
}

.footer-links a:hover { color: var(--text); }

.footer-meta {
  padding-top: 22px;
  display: grid;
  gap: 8px;
}

.footer-meta p { color: var(--muted-dim); font-size: 13px; }

.footer-disclaim {
  margin-top: 6px !important;
  padding: 12px 16px;
  border-left: 2px solid rgba(233, 201, 135, 0.5);
  color: var(--muted) !important;
  background: rgba(255, 255, 255, 0.025);
  border-radius: 0 12px 12px 0;
}

.footer-copy { color: var(--muted-dim); }

/* ── 滚动入场动画（渐进增强：仅在 html.js-reveal 时隐藏，
   无 JS / 不支持时内容始终可见，不会空白）── */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-reveal .reveal.in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   法律文档页（privacy.html / terms.html）
   ============================================================ */
.doc-main {
  position: relative;
  z-index: 1;
  width: min(860px, calc(100vw - 36px));
  margin: 0 auto;
  padding: 30px 0 60px;
}

.doc-hero {
  margin-top: 22px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(12, 19, 38, 0.86), rgba(8, 13, 26, 0.74));
  box-shadow: var(--shadow);
}

.doc-hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  letter-spacing: 0.04em;
}

.doc-meta {
  margin-top: 14px;
  color: var(--muted-dim);
  font-size: 13px;
}

.doc-body {
  margin-top: 24px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(12, 19, 38, 0.84), rgba(8, 13, 26, 0.72));
  box-shadow: var(--shadow);
}

.doc-body h2 {
  margin: 34px 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 22px;
  color: var(--gold-soft);
}

.doc-body h2:first-child { margin-top: 0; }

.doc-body h3 {
  margin: 20px 0 8px;
  font-size: 17px;
  color: var(--text);
}

.doc-body p {
  margin: 10px 0;
  color: var(--muted);
  font-size: 14.5px;
}

.doc-body ul {
  margin: 10px 0;
  padding-left: 4px;
  display: grid;
  gap: 8px;
}

.doc-body li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.doc-body li::before {
  content: "";
  position: absolute;
  left: 2px; top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.doc-body strong { color: var(--text); }

.doc-callout {
  margin: 18px 0;
  padding: 16px 20px;
  border: 1px solid rgba(233, 201, 135, 0.3);
  border-radius: 16px;
  background: rgba(233, 201, 135, 0.07);
  color: var(--muted);
  font-size: 14px;
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
}

.doc-back:hover { text-decoration: underline; }

/* ── 响应式 ── */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 40px 0 20px;
    text-align: center;
  }
  .hero-text { order: 2; }
  .hero-visual { order: 1; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-note { display: inline-block; text-align: left; }
  .grid-3,
  .algo-grid,
  .culture-layout,
  .model-layout,
  .contact-card { grid-template-columns: 1fr; }
  .model-visual { max-width: 360px; margin: 0 auto; }
}

@media (max-width: 720px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0; right: 0;
    flex-direction: column;
    gap: 4px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(8, 12, 24, 0.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 8px; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .section { padding: 30px 22px; }
  .audit-row { grid-template-columns: 1fr; }
  .audit-row dt { padding-bottom: 4px; }
  .audit-row dd { padding-top: 6px; }
  .site-footer { padding: 30px 22px; }
  .doc-hero, .doc-body { padding: 26px 22px; }
  .branch-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 420px) {
  .hero-title { font-size: 54px; }
  .brand-en { display: none; }
  .footer-brand .brand-en { display: block; }
}

/* ── 降低动效偏好 ── */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  html { scroll-behavior: auto; }
  .js-reveal .reveal { opacity: 1; transform: none; transition: none; }
}