/* ============================================================
   元启 Yuanqi · 共享设计系统（Evidence Atlas）
   供 index / chainlens / approach / about 四页复用。
   纯静态，无外部依赖；断点 700 / 900 / 1150px。
   ============================================================ */

/* ---------- 1. 令牌 ---------- */
:root {
  --ink: #070d08;
  --ink-2: #0d1510;
  --ink-3: #131d15;
  --paper: #f2f0e6;
  --paper-2: #e9e6d8;
  --signal: #c6f24e;
  --signal-dim: #9dc73a;
  --line: #d8d5c6;
  --line-dark: #1f2b20;
  --muted: #6b7263;
  --muted-dark: #8a9684;
  --danger: #e06c5a;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --container: 1216px;
  --gutter: clamp(20px, 4vw, 48px);
  --header-h: 72px;
  --radius: 6px;
  --radius-sm: 4px;

  --ease-out: cubic-bezier(.22, .8, .3, 1);
  --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 2. 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--ink);
  color: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* 全站轻噪点 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: var(--noise);
  opacity: .04;
  pointer-events: none;
  z-index: 999;
  mix-blend-mode: overlay;
}
img, svg, canvas, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--signal); color: var(--ink); }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 1000;
  background: var(--signal);
  color: var(--ink);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  transition: top .2s var(--ease-out);
}
.skip-link:focus-visible { top: 12px; }

/* ---------- 3. 显微标签 / 排版基元 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  flex: none;
}
.section-paper .eyebrow { color: var(--muted); }

.mono { font-family: var(--font-mono); }
.signal-dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px rgba(198, 242, 78, .7);
  flex: none;
}

.section {
  padding-block: clamp(88px, 11vw, 152px);
  position: relative;
}
.section-dark { background: var(--ink); color: var(--paper); }
.section-ink2 { background: var(--ink-2); color: var(--paper); }
.section-paper { background: var(--paper); color: var(--ink); }
.section-paper ::selection { background: var(--ink); color: var(--signal); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: clamp(40px, 6vw, 72px);
}
.section-paper .section-head { border-color: var(--line); }
.section-head .head-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted-dark);
  letter-spacing: .08em;
}
.section-paper .section-head .head-note { color: var(--muted); }

.display {
  font-size: clamp(44px, 7.4vw, 108px);
  line-height: 1.04;
  letter-spacing: -.03em;
  font-weight: 700;
}
.title-2 {
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.12;
  letter-spacing: -.025em;
  font-weight: 700;
}
.lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--muted-dark);
  max-width: 56ch;
}
.section-paper .lead { color: var(--muted); }
.accent { color: var(--signal); }
/* 高亮/描边词不可被换行拦腰折断 */
.accent, .manifesto-line .em, .display .accent, .hero-title .accent, .title-2 .accent { white-space: nowrap; }
/* 通用关键词保完整（2 字以上词语不跨行拆开） */
.kw { white-space: nowrap; }

/* ---------- 4. 按钮 ---------- */
.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 26px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  border: 1px solid transparent;
  transition: transform .25s var(--ease-out), background .25s, color .25s, border-color .25s;
  will-change: transform;
}
.button .arr { font-family: var(--font-mono); transition: transform .25s var(--ease-out); }
.button:hover .arr { transform: translate(2px, -2px); }
.button-signal { background: var(--signal); color: var(--ink); }
.button-signal:hover { background: #d4f96e; }
.button-outline { border-color: var(--line-dark); color: var(--paper); background: transparent; }
.button-outline:hover { border-color: var(--signal); color: var(--signal); }
.section-paper .button-outline { border-color: var(--line); color: var(--ink); }
.section-paper .button-outline:hover { border-color: var(--ink); color: var(--ink); }
.button-dark { background: var(--ink); color: var(--paper); }
.button-dark:hover { background: var(--ink-3); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--signal);
  border-bottom: 1px solid rgba(198, 242, 78, .35);
  padding-bottom: 3px;
  transition: border-color .2s, gap .2s var(--ease-out);
}
.text-link:hover { border-color: var(--signal); gap: 12px; }
.section-paper .text-link { color: var(--ink); border-color: var(--ink); }

/* ---------- 5. 滚动进度线 ---------- */
.progress-line {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 100%;
  background: var(--signal);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 210;
  pointer-events: none;
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 200;
  transition: background .35s, border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(7, 13, 8, .72);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line-dark);
}
.nav-shell {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
}
.brand img { width: 30px; height: 30px; }
.brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--muted-dark);
  margin-left: 8px;
  font-weight: 400;
}
.nav-links { display: flex; gap: clamp(18px, 2.6vw, 36px); }
.nav-links a {
  font-size: 14px;
  color: var(--muted-dark);
  padding: 6px 2px;
  position: relative;
  transition: color .2s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .3s var(--ease-out);
}
.nav-links a:hover { color: var(--paper); }
.nav-links a[aria-current="page"] { color: var(--paper); }
.nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-cta {
  font-size: 13px;
  font-weight: 600;
  padding: 9px 16px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  transition: border-color .2s, color .2s;
}
.nav-cta:hover { border-color: var(--signal); color: var(--signal); }

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
}
.menu-toggle span {
  position: absolute;
  left: 10px; right: 10px;
  height: 1.5px;
  background: var(--paper);
  transition: transform .3s var(--ease-out), top .3s var(--ease-out);
}
.menu-toggle span:first-child { top: 15px; }
.menu-toggle span:last-child { top: 23px; }
.menu-toggle[aria-expanded="true"] span:first-child { top: 19px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { top: 19px; transform: rotate(-45deg); }

/* ---------- 7. Hero / 证据星图 ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(1100px 620px at 78% 18%, rgba(198, 242, 78, .05), transparent 60%),
    radial-gradient(900px 700px at 12% 88%, rgba(198, 242, 78, .03), transparent 60%),
    var(--ink);
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero-canvas, .hero-canvas-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
/* 静态星图默认渲染；canvas 成功启动后（.atlas-live）再隐藏 */
.hero-canvas-fallback { display: block; }
.hero.atlas-live .hero-canvas-fallback { display: none; }
.hero.no-motion .hero-canvas { display: none; }
.hero.no-motion .hero-canvas-fallback { display: block; }
.hero-inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(72px, 10vh, 140px);
}
.hero .eyebrow { margin-bottom: clamp(24px, 3.5vw, 40px); }
.hero-title {
  font-size: clamp(52px, 9.2vw, 128px);
  line-height: 1.02;
  letter-spacing: -.035em;
  font-weight: 700;
  max-width: 12ch;
}
.hero-sub {
  margin-top: clamp(24px, 3vw, 36px);
  font-size: clamp(16px, 1.6vw, 20px);
  line-height: 1.85;
  color: var(--muted-dark);
  max-width: 46ch;
}
.hero-ctas {
  margin-top: clamp(32px, 4vw, 48px);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-meta {
  position: absolute;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--muted-dark);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-meta.tl { top: calc(var(--header-h) + 22px); left: var(--gutter); }
.hero-meta.br { bottom: 22px; right: var(--gutter); }
.hero-meta.bl { bottom: 22px; left: var(--gutter); }
.hero-scroll-hint {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--muted-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.hero-scroll-hint::after {
  content: "";
  width: 1px; height: 34px;
  background: linear-gradient(var(--signal), transparent);
}

/* ---------- 8. 数据带 ticker ---------- */
.ticker-band {
  background: var(--ink-2);
  border-block: 1px solid var(--line-dark);
  overflow: hidden;
  position: relative;
}
.ticker-band[hidden] { display: none; }
.ticker {
  display: flex;
  width: max-content;
  animation: ticker-scroll 46s linear infinite;
}
.ticker-band:hover .ticker { animation-play-state: paused; }
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.ticker-group {
  display: flex;
  align-items: center;
  flex: none;
}
.ticker-item {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 34px;
  border-right: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: nowrap;
}
.ticker-item .tk-label {
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--muted-dark);
  text-transform: uppercase;
}
.ticker-item .tk-value { color: var(--paper); font-weight: 600; }
.ticker-item .up { color: var(--signal); }
.ticker-item .down { color: var(--danger); }
.ticker-item.tk-note { color: var(--muted-dark); font-size: 11px; letter-spacing: .12em; }

/* ---------- 9. 宣言段 ---------- */
.manifesto { background: var(--paper); color: var(--ink); }
.manifesto-line {
  font-size: clamp(34px, 5.6vw, 76px);
  line-height: 1.16;
  letter-spacing: -.025em;
  font-weight: 700;
}
.manifesto-line + .manifesto-line { margin-top: .35em; }
.manifesto-line .em { color: transparent; -webkit-text-stroke: 1.2px var(--ink); }
.manifesto-foot {
  margin-top: clamp(36px, 5vw, 56px);
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}
.manifesto-foot::before { content: ""; width: 48px; height: 1px; background: var(--muted); }

/* ---------- 10. 索引行（方法/原则等，非卡片式） ---------- */
.index-list { border-top: 1px solid var(--line-dark); }
.section-paper .index-list { border-color: var(--line); }
.index-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: baseline;
  gap: clamp(20px, 4vw, 64px);
  padding: clamp(26px, 3.4vw, 40px) 0;
  border-bottom: 1px solid var(--line-dark);
  transition: padding-left .3s var(--ease-out);
  position: relative;
}
.section-paper .index-row { border-color: var(--line); }
a.index-row:hover { padding-left: 14px; }
a.index-row:hover .index-no { color: var(--signal); }
.section-paper a.index-row:hover .index-no { color: var(--ink); }
.index-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted-dark);
  letter-spacing: .14em;
  transition: color .25s;
}
.section-paper .index-no { color: var(--muted); }
.index-main h3 {
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 700;
  letter-spacing: -.015em;
  margin-bottom: 8px;
}
.index-main p { color: var(--muted-dark); font-size: 15px; max-width: 52ch; }
.section-paper .index-main p { color: var(--muted); }
.index-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted-dark);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.section-paper .index-tag { color: var(--muted); }
.index-tag .arr { transition: transform .25s var(--ease-out); }
a.index-row:hover .index-tag .arr { transform: translate(3px, -3px); color: var(--signal); }
.section-paper a.index-row:hover .index-tag .arr { color: var(--ink); }

/* ---------- 11. 产品预告 ---------- */
.product-teaser-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: start;
}
.product-frame {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  position: relative;
}
.product-frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.product-frame-bar .dots { display: inline-flex; gap: 6px; }
.product-frame-bar .dots i {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 1px solid var(--muted-dark);
}
.product-frame-bar .dots i:first-child { background: var(--signal); border-color: var(--signal); }
.product-frame img { width: 100%; height: auto; }
.product-frame-cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-dark);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.fact-list { margin-top: clamp(28px, 4vw, 44px); border-top: 1px solid var(--line-dark); }
.fact-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 15px;
}
.fact-list .fact-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-dark);
  padding-top: 4px;
}
.section-paper .fact-list { border-top-color: var(--line); }
.section-paper .fact-list li { border-bottom-color: var(--line); }
.section-paper .fact-list .fact-k { color: var(--muted); }

/* ---------- 12. 结尾 CTA ---------- */
.final-cta { text-align: left; position: relative; overflow: hidden; }
.final-cta .display { max-width: 14ch; }
.final-cta-row {
  margin-top: clamp(36px, 5vw, 56px);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.final-cta .eyebrow { margin-bottom: 28px; }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  background: var(--ink);
  border-top: 1px solid var(--line-dark);
  padding: clamp(48px, 6vw, 72px) 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-tagline {
  margin-top: 18px;
  color: var(--muted-dark);
  font-size: 14px;
  max-width: 34ch;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted-dark);
  font-weight: 400;
  margin-bottom: 16px;
}
.footer-col a, .footer-col button {
  display: block;
  font-size: 14px;
  color: var(--paper);
  padding: 5px 0;
  text-align: left;
  transition: color .2s;
}
.footer-col a:hover, .footer-col button:hover { color: var(--signal); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 26px;
  font-size: 12.5px;
  color: var(--muted-dark);
}
.footer-bottom .mono { letter-spacing: .14em; font-size: 11px; }

/* ---------- 14. 对话框 / toast / 表单 ---------- */
dialog {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 0;
  width: min(560px, calc(100vw - 40px));
  max-height: min(82vh, 760px);
  overflow: auto;
}
dialog::backdrop { background: rgba(7, 13, 8, .68); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
dialog[open] { animation: dialog-in .3s var(--ease-out); }
@keyframes dialog-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.dialog-body { padding: clamp(24px, 4vw, 40px); }
.dialog-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}
.dialog-top .eyebrow { color: var(--muted); }
.dialog-close {
  width: 36px; height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
  transition: color .2s, border-color .2s;
  flex: none;
}
.dialog-close:hover { color: var(--ink); border-color: var(--ink); }
dialog h2 { font-size: clamp(24px, 3vw, 32px); letter-spacing: -.02em; margin-bottom: 12px; }
dialog p { color: var(--muted); font-size: 14.5px; }
dialog p + p { margin-top: 12px; }
.dialog-description { margin-bottom: 24px; }
dialog label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin: 18px 0 7px;
}
dialog label span { color: var(--muted); font-weight: 400; }
dialog input, dialog select, dialog textarea {
  width: 100%;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
}
dialog textarea { resize: vertical; min-height: 110px; }
dialog input:focus-visible, dialog select:focus-visible, dialog textarea:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 1px;
}
dialog .button { width: 100%; justify-content: center; margin-top: 24px; }
.form-feedback {
  min-height: 20px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 16px);
  background: var(--ink-2);
  color: var(--paper);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--signal);
  border-radius: var(--radius-sm);
  padding: 13px 22px;
  font-size: 13.5px;
  z-index: 400;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
  max-width: min(480px, calc(100vw - 40px));
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 15. 滚动 reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].revealed { opacity: 1; transform: none; }

/* ---------- 16. 磁吸按钮 ---------- */
[data-magnetic] { transition: transform .2s var(--ease-out); }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1150px) {
  .hero-title { font-size: clamp(48px, 10vw, 96px); }
  .product-teaser-grid { grid-template-columns: 1fr; }
  .index-row { grid-template-columns: 80px 1fr auto; }
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr; }
  .index-row { grid-template-columns: 64px 1fr; }
  .index-tag { grid-column: 2; margin-top: 10px; }
  .hero-meta.tl { display: none; }
}
@media (max-width: 700px) {
  :root { --header-h: 62px; }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    inset-inline: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(7, 13, 8, .96);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line-dark);
    padding: 12px var(--gutter) 24px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s var(--ease-out), transform .25s var(--ease-out), visibility .25s;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 14px 0; font-size: 16px; border-bottom: 1px solid var(--line-dark); }
  .nav-links a::after { display: none; }
  .nav-links a[aria-current="page"] { color: var(--signal); }
  .menu-toggle { display: block; }
  .nav-cta { display: none; }
  .hero-title { font-size: clamp(44px, 13.5vw, 64px); }
  .hero-meta.bl { display: none; }
  .hero-scroll-hint { display: none; }
  .fact-list li { grid-template-columns: 1fr; gap: 4px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .ticker-item { padding: 12px 22px; }
  .index-row { grid-template-columns: 1fr; gap: 10px; }
  .index-tag { grid-column: 1; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- 18. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .ticker { animation: none; flex-wrap: wrap; width: 100%; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero-scroll-hint::after { display: none; }
  .hero .hero-canvas { display: none; }
  .hero .hero-canvas-fallback { display: block !important; }
}

/* ---------- 19. 子页面 hero ---------- */
.page-hero {
  background:
    radial-gradient(1000px 560px at 82% 0%, rgba(198, 242, 78, .05), transparent 60%),
    var(--ink);
  padding: calc(var(--header-h) + clamp(72px, 10vw, 140px)) 0 clamp(64px, 8vw, 110px);
  position: relative;
}
.page-hero .eyebrow { margin-bottom: clamp(24px, 3vw, 36px); }
.page-hero .display { max-width: 15ch; }
.page-hero .lead { margin-top: clamp(22px, 3vw, 32px); }
.page-hero-ctas { margin-top: clamp(30px, 4vw, 44px); display: flex; flex-wrap: wrap; gap: 16px; }
.page-hero-note {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- 20. 长截图渐隐 ---------- */
.product-frame-tall { position: relative; }
.product-frame-tall .tall-viewport {
  max-height: min(76vh, 720px);
  overflow: hidden;
  position: relative;
}
.product-frame-tall .tall-viewport::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 34%;
  background: linear-gradient(transparent, var(--ink-2));
  pointer-events: none;
}

/* ---------- 21. sticky 阶段叙事（approach） ---------- */
.stages-layout {
  display: grid;
  grid-template-columns: minmax(210px, 3fr) minmax(0, 7fr);
  gap: clamp(48px, 7vw, 112px);
  align-items: start;
}
.stage-nav { position: sticky; top: calc(var(--header-h) + 48px); }
.stage-nav .stage-nav-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted-dark);
  margin-bottom: 14px;
}
.stage-nav a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-dark);
  color: var(--muted-dark);
  font-size: 15px;
  transition: color .25s, padding-left .3s var(--ease-out), border-color .25s;
}
.stage-nav a .stage-nav-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  transition: color .25s;
}
.stage-nav a:hover { color: var(--paper); }
.stage-nav a.active { color: var(--paper); padding-left: 10px; border-bottom-color: var(--signal); }
.stage-nav a.active .stage-nav-no { color: var(--signal); }
.stage-panel {
  min-height: 58vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(40px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--line-dark);
}
.stage-panel:last-child { border-bottom: 0; }
.stage-no {
  font-family: var(--font-mono);
  font-size: clamp(56px, 7vw, 96px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-dark);
  letter-spacing: -.02em;
}
.stage-en {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--signal);
}
.stage-panel h3 {
  margin-top: 12px;
  font-size: clamp(28px, 3.6vw, 46px);
  letter-spacing: -.02em;
}
.stage-panel p { margin-top: 16px; color: var(--muted-dark); max-width: 52ch; font-size: 16px; }
.stage-panel .stage-detail {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted-dark);
  letter-spacing: .04em;
}
@media (max-width: 900px) {
  .stages-layout { grid-template-columns: 1fr; gap: 24px; }
  .stage-nav { position: static; display: flex; flex-wrap: wrap; gap: 0 22px; border-top: 1px solid var(--line-dark); }
  .stage-nav .stage-nav-label { width: 100%; margin: 14px 0 4px; }
  .stage-nav a { border-bottom: 0; padding: 10px 0; }
  .stage-nav a.active { padding-left: 0; border-bottom: 0; color: var(--signal); }
  .stage-panel { min-height: 0; padding: 36px 0; }
}

/* ---------- 22. 数据源发丝线网格 ---------- */
.source-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}
.source-cell {
  padding: clamp(18px, 2.4vw, 28px);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.source-cell .source-k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--muted-dark);
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}
.source-cell strong { display: block; font-size: 16px; margin-bottom: 6px; }
.source-cell small { color: var(--muted-dark); font-size: 13px; }
@media (max-width: 900px) { .source-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 23. 路线时间线 ---------- */
.timeline { border-top: 1px solid var(--line-dark); }
.timeline-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(20px, 4vw, 56px);
  padding: clamp(24px, 3.2vw, 38px) 0;
  border-bottom: 1px solid var(--line-dark);
  align-items: baseline;
}
.timeline-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-dark);
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.timeline-status.now { color: var(--paper); }
.timeline-status.now::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px rgba(198, 242, 78, .7);
  flex: none;
}
.timeline-row h3 { font-size: clamp(19px, 2.2vw, 25px); letter-spacing: -.01em; }
.timeline-row h3 small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted-dark);
  font-weight: 400;
}
.timeline-row p { color: var(--muted-dark); font-size: 15px; }
.section-paper .timeline { border-top-color: var(--line); }
.section-paper .timeline-row { border-bottom-color: var(--line); }
.section-paper .timeline-status { color: var(--muted); }
.section-paper .timeline-status.now { color: var(--ink); }
.section-paper .timeline-row h3 small,
.section-paper .timeline-row p { color: var(--muted); }
@media (max-width: 900px) {
  .timeline-row { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- 24. FAQ ---------- */
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 24px 0;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 600;
  letter-spacing: -.01em;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .fx {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--muted);
  transition: transform .3s var(--ease-out);
  flex: none;
}
.faq-list details[open] summary .fx { transform: rotate(45deg); color: var(--ink); }
.faq-list details p {
  color: var(--muted);
  max-width: 66ch;
  padding: 0 0 26px;
  font-size: 15px;
}
.section-dark .faq-list, .section-ink2 .faq-list { border-top-color: var(--line-dark); }
.section-dark .faq-list details, .section-ink2 .faq-list details { border-bottom-color: var(--line-dark); }
.section-dark .faq-list details p, .section-ink2 .faq-list details p { color: var(--muted-dark); }
.section-dark .faq-list details[open] summary .fx { color: var(--signal); }

/* ---------- 25. 诚实边界清单（编辑式，非警告样式） ---------- */
.boundary-list { border-top: 1px solid var(--line-dark); }
.boundary-list li {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: clamp(20px, 4vw, 64px);
  padding: clamp(24px, 3.2vw, 36px) 0;
  border-bottom: 1px solid var(--line-dark);
  align-items: baseline;
}
.boundary-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.boundary-list h3 { font-size: clamp(20px, 2.4vw, 28px); letter-spacing: -.015em; margin-bottom: 8px; }
.boundary-list p { color: var(--muted-dark); font-size: 15px; max-width: 56ch; }
@media (max-width: 700px) {
  .boundary-list li { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- 26. 索引行内联子注 ---------- */
.index-sub {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted-dark);
}
.section-paper .index-sub { color: var(--muted); }

/* 首屏证据图与聚焦产品预览 */
.evidence-orbit {position:absolute;right:max(4vw,calc((100vw - 1216px)/2));top:50%;width:min(37vw,510px);aspect-ratio:1;transform:translateY(-40%);z-index:2;pointer-events:none;}
.evidence-orbit::before,.evidence-orbit::after {content:"";position:absolute;inset:12%;border:1px solid rgba(198,242,78,.2);border-radius:50%;}
.evidence-orbit::after {inset:24%;border-style:dashed;opacity:.6;}
.orbit-core {position:absolute;inset:34%;border-radius:50%;background:radial-gradient(circle,rgba(198,242,78,.10),rgba(7,13,8,.9));display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;text-align:center;}
.orbit-core>span {font-size:36px;font-weight:700;color:var(--signal);letter-spacing:.15em;}
.orbit-core strong {font-size:14px;}.orbit-core small {font-size:11px;color:var(--muted-dark);}
.orbit-node {position:absolute;padding:20px 24px;background:rgba(13,21,16,.9);border:1px solid rgba(198,242,78,.18);backdrop-filter:blur(8px);min-width:156px;display:grid;gap:9px;border-radius:6px;}
.orbit-node small {font:10px var(--font-mono);letter-spacing:.14em;color:var(--signal);}.orbit-node strong {font-size:19px;font-weight:500;}.orbit-node>span {font-size:12px;color:var(--muted-dark);}
.node-events {left:0;top:9%;}.node-markets {right:0;top:29%;}.node-chain {left:10%;bottom:5%;}
.orbit-caption {position:absolute;bottom:-5%;width:100%;font:10px var(--font-mono);text-align:center;letter-spacing:.13em;color:var(--muted-dark);}
.home-product-frame {align-self:center;}.home-product-frame img {height:440px;object-fit:cover;object-position:top;}
.ticker-band:focus-within .ticker {animation-play-state:paused;}
@media (max-width:1150px) {.evidence-orbit {width:36vw;right:3vw;}.orbit-node {padding:14px;min-width:128px;}.orbit-node strong {font-size:16px;}.orbit-core>span {font-size:28px;}}
@media (max-width:900px) {.evidence-orbit {display:none;}.home-product-frame img {height:440px;}}
@media (max-width:700px) {.hero-ctas {flex-direction:row;flex-wrap:wrap;}.hero-ctas .button {font-size:13px;padding-inline:14px;}.home-product-frame img {height:340px;}.hero {min-height:790px;min-height:92svh;}.hero-meta.br {max-width:calc(100% - 40px);font-size:9px;}}

/* 工作台入口：桌面与移动导航始终可见 */
.workspace-entry {background:var(--signal);color:var(--ink);border-color:var(--signal);white-space:nowrap;}
.workspace-entry:hover {background:var(--paper);border-color:var(--paper);color:var(--ink);}
.product-workspace-entry {margin-left:24px;}
@media(max-width:700px) {.nav-cta.workspace-entry {display:inline-flex;font-size:12px;padding:8px 10px;}.nav-actions {gap:8px;}.brand-en {display:none;}}