:root {
  --ink: #0B1F3C;            /* 深空蓝 */
  --deep: #07152C;           /* 品牌原图 icon 底色（品牌规范 §11 取样 app_icon_512.png 即此值），非自造 */
  --orange: #F28C28;         /* 日光橙；不用于正文与小字号 */
  --teal: #007F73;           /* 中立青 */
  --slate: #52616B;          /* 岩灰 */
  --mist: #E8EDF0;           /* 雾灰：页面地色 */
  --cloud: #F6F7F5;          /* 云白：卡片/区块 */
  --line: rgba(82, 97, 107, 0.20);  /* 岩灰透明度过渡，非新色 */
  --shadow: 0 18px 48px rgba(7, 21, 44, 0.08);
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--mist);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
img { max-width: 100%; display: block; }

.site-header {
  height: 76px;
  background: var(--cloud);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--max);
  height: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  gap: 32px;
}
.logo { display: inline-flex; align-items: center; width: 196px; }
.logo img { width: 196px; height: auto; }
.main-nav { display: flex; justify-content: center; gap: 10px; }
.main-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 15px;
  font-size: 14px;
  font-weight: 700;
  color: var(--slate);
  border-bottom: 3px solid transparent;
}
.main-nav a.active { color: var(--ink); border-bottom-color: var(--orange); }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 14px; }
.lang-link { min-height: 44px; display: inline-flex; align-items: center; font-size: 13px; color: var(--slate); }
.btn {
  min-height: 48px;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none !important;
  cursor: pointer;
}
.btn-primary { background: var(--orange); color: var(--ink); }
.btn-primary:hover { background: rgba(242, 140, 40, 0.88); }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-secondary:hover { background: var(--ink); color: var(--cloud); }
.btn-light { background: var(--cloud); color: var(--ink); }
.btn-text { color: var(--cloud); border-color: rgba(255, 255, 255, 0.42); }

main { min-height: calc(100vh - 76px); }
.page { display: none; }
.page.active { display: block; }

.hero {
  background: var(--deep);
  color: var(--cloud);
  min-height: 680px;
  display: flex;
  align-items: center;
}
.hero-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 88px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 72px;
  align-items: center;
}
.eyebrow {
  margin-bottom: 18px;
  color: var(--slate);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.hero .eyebrow { color: var(--mist); }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 720px;
  margin-bottom: 26px;
  font-size: clamp(36px, 3.3vw, 46px);
  line-height: 1.16;
  letter-spacing: -0.025em;
}
.hero-lede {
  max-width: 660px;
  margin-bottom: 18px;
  color: var(--mist);
  font-size: 20px;
  line-height: 1.75;
}
.identity-line {
  margin-bottom: 34px;
  color: var(--mist);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.layer-card {
  background: var(--cloud);
  color: var(--ink);
  padding: 34px;
  border-top: 5px solid var(--orange);
  box-shadow: var(--shadow);
}
.layer-card-label { margin-bottom: 18px; color: var(--slate); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.layer-row {
  min-height: 72px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-bottom: 0;
  background: var(--cloud);
  font-weight: 800;
}
.layer-row:first-of-type { border-top: 0; }
.layer-row.middle {
  min-height: 108px;
  background: var(--ink);
  color: var(--cloud);
  border-color: var(--ink);
}
.layer-row.bottom { border-bottom: 1px solid var(--line); }
.layer-row small { font-size: 12px; font-weight: 700; color: var(--slate); }
.layer-row.middle small { color: var(--mist); }
.layer-note { margin: 18px 0 0; color: var(--slate); font-size: 13px; line-height: 1.6; }

.section { padding: 96px 32px; }
.section.white { background: var(--cloud); }
.section-inner { max-width: var(--max); margin: 0 auto; }
.section-head {
  margin-bottom: 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: end;
}
.section-kicker { margin-bottom: 10px; color: var(--slate); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.verify-card.dark .section-kicker { color: var(--mist); }
h2 { margin-bottom: 0; font-size: clamp(30px, 3vw, 42px); line-height: 1.2; letter-spacing: -0.025em; }
.section-lede { margin-bottom: 0; color: var(--slate); font-size: 17px; }
.rule { height: 1px; margin-bottom: 44px; background: var(--line); }

.commit-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.commit-card {
  min-height: 275px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  background: var(--cloud);
  border: 1px solid var(--line);
}
.commit-card:nth-child(2) { border-top: 4px solid var(--teal); }
.commit-card:nth-child(1) { border-top: 4px solid var(--orange); }
.commit-card:nth-child(3) { border-top: 4px solid var(--slate); }
.commit-index { margin-bottom: 30px; color: var(--slate); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.commit-card h3 { margin-bottom: 14px; font-size: 25px; }
.commit-card p { margin-bottom: 24px; color: var(--slate); font-size: 15px; }
.commit-question { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 800; }

.data-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.data-card { min-height: 245px; padding: 28px; background: var(--cloud); }
.data-value { margin-bottom: 18px; font-size: clamp(28px, 2.6vw, 38px); font-weight: 800; line-height: 1.05; letter-spacing: -0.04em; }
.data-card p { margin-bottom: 20px; color: var(--slate); font-size: 14px; line-height: 1.65; }
.data-source { color: var(--slate); font-size: 12px; line-height: 1.5; }
.scope-note {
  margin-top: 1px;
  padding: 18px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--cloud);
  border: 1px solid var(--line);
  border-top: 0;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}
.scope-note::before { content: ""; width: 8px; height: 8px; margin-top: 9px; flex: 0 0 auto; background: var(--orange); }

.boundary-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 64px; align-items: start; }
.boundary-copy { color: var(--slate); font-size: 16px; }
.boundary-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.boundary-item { padding: 20px 22px; background: var(--cloud); border-left: 4px solid var(--ink); font-weight: 700; }
.boundary-item span { display: block; margin-bottom: 6px; color: var(--slate); font-size: 12px; }

.next-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.next-card { padding: 34px; background: var(--cloud); border: 1px solid var(--line); }
.next-card h3 { margin-bottom: 12px; font-size: 25px; }
.next-card p { margin-bottom: 26px; color: var(--slate); font-size: 15px; }
.next-meta { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--slate); font-size: 12px; }

.subhero { padding: 84px 32px 64px; background: var(--cloud); border-bottom: 1px solid var(--line); }
.subhero-inner { max-width: var(--max); margin: 0 auto; }
.subhero h1 { margin-bottom: 20px; font-size: clamp(36px, 4vw, 52px); }
.subhero p { max-width: 760px; color: var(--slate); font-size: 18px; }

.path { max-width: var(--max); margin: 0 auto; padding: 72px 32px; }
.path-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; counter-reset: step; }
.path-card { position: relative; padding: 32px; background: var(--cloud); border: 1px solid var(--line); }
.path-card::before {
  counter-increment: step;
  content: "0" counter(step);
  display: inline-flex;
  width: 44px;
  height: 44px;
  margin-bottom: 26px;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--cloud);
  font-size: 13px;
  font-weight: 800;
}
.path-card h3 { margin-bottom: 12px; font-size: 23px; }
.path-card p { margin-bottom: 0; color: var(--slate); font-size: 15px; }
.path-card.current { border-top: 4px solid var(--orange); }

.link-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.portal-link { min-height: 150px; padding: 24px; display: flex; flex-direction: column; background: var(--cloud); border: 1px solid var(--line); }
.portal-link strong { margin-bottom: 8px; font-size: 17px; }
.portal-link span { color: var(--slate); font-size: 13px; }
.portal-link small { margin-top: auto; color: var(--slate); font-size: 12px; font-weight: 800; letter-spacing: 0.08em; }

.verify-panel { max-width: var(--max); margin: 0 auto; padding: 72px 32px 96px; }
.verify-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 18px; }
.verify-card { padding: 36px; background: var(--cloud); border: 1px solid var(--line); }
.verify-card.dark { background: var(--ink); color: var(--cloud); border-color: var(--ink); }
.verify-card.dark p { color: var(--mist); }
.verify-card h3 { margin-bottom: 14px; font-size: 26px; }
.verify-card p { color: var(--slate); }
.verify-list { margin: 24px 0 0; padding: 0; list-style: none; }
.verify-list li { padding: 16px 0; display: flex; gap: 14px; border-top: 1px solid var(--line); }
.verify-list li::before { content: ""; width: 8px; height: 8px; margin-top: 10px; flex: 0 0 auto; background: var(--orange); }
.verify-list span { color: var(--slate); }
.notfound { min-height: calc(100vh - 76px); padding: 120px 32px; display: flex; align-items: center; background: var(--cloud); }
.notfound-inner { max-width: 720px; margin: 0 auto; text-align: center; }
.notfound-code { margin-bottom: 18px; color: var(--slate); font-size: 14px; font-weight: 800; letter-spacing: 0.12em; }
.notfound h1 { margin-left: auto; margin-right: auto; font-size: clamp(38px, 4vw, 54px); }
.notfound p { color: var(--slate); }
.notfound-actions { margin-top: 34px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.site-footer { background: var(--deep); color: var(--cloud); }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 64px 32px 34px; }
.footer-top { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; padding-bottom: 42px; border-bottom: 1px solid rgba(255,255,255,0.16); }
.footer-logo { width: 210px; margin-bottom: 24px; }
.footer-copy { max-width: 480px; color: var(--mist); font-size: 14px; }
.footer-title { margin-bottom: 14px; color: var(--mist); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { min-height: 32px; color: var(--cloud); font-size: 14px; }
.footer-links small { display: block; color: var(--mist); font-size: 12px; }
.footer-bottom { padding-top: 28px; display: flex; justify-content: space-between; gap: 24px; color: var(--mist); font-size: 12px; }
.footer-slogan { color: var(--cloud); font-weight: 700; }
.footer-slogan span { display: block; color: var(--mist); font-weight: 400; }
.footer-brand { padding-top: 30px; color: var(--cloud); font-size: 15px; font-weight: 800; letter-spacing: 0.02em; }

.prototype-note {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 10;
  padding: 9px 12px;
  background: var(--deep);
  color: var(--cloud);
  font-size: 12px;
  box-shadow: var(--shadow);
}

/* ---- V1.1 新增：边界块主语说明（六色只用品牌色，橙不上正文） ---- */
.boundary-subject {
  margin-bottom: 18px;
  padding: 18px 22px;
  background: var(--mist);
  border-left: 4px solid var(--teal);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
}
.boundary-item small { display: block; margin-top: 8px; color: var(--slate); font-size: 12px; font-weight: 400; }

/* ---- V1.1 新增：六格（你买到的是六样东西） ---- */
.six-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.six-card {
  padding: 30px 30px 26px;
  display: flex;
  flex-direction: column;
  background: var(--cloud);
  border: 1px solid var(--line);
}
.six-top { margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.six-chip { width: 12px; height: 12px; flex: 0 0 auto; }
.six-card:nth-child(1) .six-chip { background: var(--ink); }
.six-card:nth-child(2) .six-chip { background: var(--orange); }
.six-card:nth-child(3) .six-chip { background: var(--teal); }
.six-card:nth-child(4) .six-chip { background: var(--slate); }
.six-card:nth-child(5) .six-chip { background: var(--mist); border: 1px solid var(--slate); }
.six-card:nth-child(6) .six-chip { background: var(--cloud); border: 1px solid var(--slate); }
.six-no { color: var(--slate); font-size: 12px; font-weight: 800; letter-spacing: 0.12em; }
.six-card h3 { margin-bottom: 16px; font-size: 24px; }
.six-row { margin-bottom: 14px; }
.six-label { display: block; margin-bottom: 5px; color: var(--slate); font-size: 11px; font-weight: 800; letter-spacing: 0.1em; }
.six-row p { margin-bottom: 0; color: var(--slate); font-size: 14px; line-height: 1.65; }
.six-row p.six-result { color: var(--ink); font-size: 15px; font-weight: 800; }
.six-note { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); color: var(--slate); font-size: 12px; }

@media (max-width: 1023px) {
  .header-inner { grid-template-columns: 190px 1fr auto; padding: 0 24px; gap: 18px; }
  .logo, .logo img { width: 176px; }
  .header-actions .lang-link { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 42px; padding: 72px 24px; }
  .hero-inner > * { min-width: 0; }
  .layer-card { width: 100%; max-width: 620px; min-width: 0; }
  .layer-row { min-width: 0; }
  .section { padding: 76px 24px; }
  .section-head, .boundary-grid, .verify-grid, .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .commit-grid, .path-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .link-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .six-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 767px) {
  body { font-size: 15px; }
  .site-header { height: auto; }
  .header-inner { grid-template-columns: 1fr; gap: 0; padding: 14px 18px 0; }
  .logo { width: 176px; margin-bottom: 8px; }
  .main-nav { justify-content: flex-start; overflow-x: auto; }
  .main-nav a { padding: 0 12px; white-space: nowrap; }
  .header-actions { display: none; }
  .hero { min-height: auto; }
  .hero-inner { width: 100%; max-width: 100%; padding: 64px 18px; }
  h1 { max-width: 100%; font-size: 30px; overflow-wrap: anywhere; }
  .hero-lede { max-width: 100%; font-size: 16px; }
  .hero-actions { width: 100%; flex-direction: column; }
  .btn { width: 100%; min-height: 52px; }
  .layer-card { width: 100%; max-width: none; padding: 22px; }
  .layer-row { align-items: flex-start; flex-direction: column; gap: 6px; }
  .layer-row small { margin-left: 0; text-align: left; white-space: normal; }
  .section, .subhero, .path, .verify-panel { padding-left: 18px; padding-right: 18px; }
  .section { padding-top: 64px; padding-bottom: 64px; }
  .data-grid, .boundary-list, .next-grid, .link-grid, .six-grid { grid-template-columns: 1fr; }
  .data-card { min-height: auto; }
  .footer-bottom { flex-direction: column; }
  .prototype-note { left: 12px; right: 12px; bottom: 12px; text-align: center; }
}

@media print {
  body { background: var(--cloud); color: var(--ink); font-size: 11pt; }
  .site-header, .hero-actions, .prototype-note, .notfound-actions { display: none !important; }
  .hero, .site-footer { background: var(--cloud) !important; color: var(--ink) !important; }
  .hero-lede, .identity-line, .layer-note, .footer-copy, .footer-brand, .footer-links a, .footer-links small, .footer-bottom { color: var(--ink) !important; }
  .section { padding: 28pt 0; }
  .section-inner, .hero-inner, .subhero-inner, .path, .verify-panel, .notfound-inner { max-width: none; padding-left: 0; padding-right: 0; }
  .hero { min-height: auto; }
  .commit-grid, .data-grid, .boundary-list, .next-grid, .path-grid, .link-grid, .verify-grid, .six-grid { display: block; }
  .commit-card, .data-card, .boundary-item, .next-card, .path-card, .portal-link, .verify-card, .six-card { margin-bottom: 12pt; border: 1pt solid rgba(82, 97, 107, 0.45); page-break-inside: avoid; }
  .layer-card { border: 1pt solid rgba(82, 97, 107, 0.45); box-shadow: none; }
  .layer-row.middle { background: var(--mist); color: var(--ink); }
  a[href^="mailto:"]::after { content: " <" attr(href) ">"; }
}