@charset "UTF-8";

:root {
  --bg: #e8f0f2;
  --ink: #122028;
  --panel: #ffffff;
  --accent: #0f8a8a;
  --accent-deep: #0a5f5f;
  --sand: #f4ebe0;
  --mute: #5a6b74;
  --rail: #1a2e38;
  --header-h: 72px;
  --nav-shadow: 2px 2px 0 rgba(18, 32, 40, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(15, 138, 138, 0.12), transparent 36%),
    linear-gradient(180deg, #dfe9ec 0%, var(--bg) 40%, #f2f6f7 100%);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

.shell, .hero-shell, .header-shell {
  width: min(calc(100% - 36px), 1120px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  background: rgba(232, 240, 242, 0.94);
  border-bottom: 1px solid rgba(18, 32, 40, 0.12);
  backdrop-filter: blur(8px);
}
.header-shell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  height: var(--header-h);
  column-gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img {
  width: 40px; height: 40px;
  object-fit: contain;
  background: #fff;
  box-shadow: var(--nav-shadow);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-copy strong { font-size: 18px; letter-spacing: 0.02em; }
.brand-copy span { color: var(--mute); font-size: 12px; }
.primary-nav { justify-self: center; min-width: 0; }
.primary-nav ul {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 14px;
  font-weight: 700;
}
.primary-nav a { white-space: nowrap; }
.primary-nav a.is-active,
.primary-nav a:hover { color: var(--accent-deep); }
.header-get { justify-self: end; }
.header-get, .mobile-get, .hero-cta a, .get-stamp a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
  font-size: 13px;
  box-shadow: var(--nav-shadow);
  white-space: nowrap;
}
.hero-cta a, .get-stamp a { min-height: 50px; min-width: 168px; font-size: 15px; }
.mobile-actions { display: none; align-items: center; gap: 8px; }
.menu-toggle {
  width: 40px; height: 40px;
  display: grid;
  gap: 4px;
  place-content: center;
  border: 1px solid var(--ink);
}
.menu-toggle i { display: block; width: 16px; height: 2px; background: var(--ink); }

.hero { padding: 52px 0 64px; }
.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 28px;
  align-items: center;
}
.kicker {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}
h1 {
  margin: 0;
  font-size: clamp(56px, 9vw, 92px);
  line-height: 0.92;
  letter-spacing: -0.03em;
}
.lead {
  margin: 14px 0 12px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.25;
}
.intro { margin: 0 0 22px; color: var(--mute); max-width: 520px; }
.hero-cta { display: flex; }
.stamp { margin: 14px 0 0; color: var(--mute); font-size: 12px; }

.tag-lattice {
  background: var(--panel);
  border: 1px solid rgba(18, 32, 40, 0.14);
  box-shadow: 10px 12px 0 rgba(15, 138, 138, 0.18);
}
.lattice-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--rail);
  color: #e8f0f2;
  font-weight: 800;
}
.lattice-head span { font-size: 11px; letter-spacing: 0.14em; color: #8eb8b8; }
.lattice-body {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  padding: 16px;
  background:
    linear-gradient(135deg, rgba(15, 138, 138, 0.08), transparent 50%),
    var(--sand);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
}
.tag-cloud li {
  padding: 8px 12px;
  background: #fff;
  border: 1px solid rgba(18, 32, 40, 0.12);
  font-size: 13px;
  font-weight: 700;
}
.tag-cloud li.hot {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.tag-lattice figure { margin: 0; width: 132px; }
.tag-lattice img {
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
  box-shadow: 4px 4px 0 rgba(18, 32, 40, 0.2);
}

.block-head { margin-bottom: 22px; }
.block-head p {
  margin: 0 0 6px;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}
.block-head h2 { margin: 0 0 8px; font-size: 30px; }
.block-head span { color: var(--mute); }
.block-head.light p { color: #7fd4d0; }
.block-head.light span { color: #b7c8d0; }

.index-section { padding: 68px 0; }
.index-console {
  display: grid;
  gap: 16px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid rgba(18, 32, 40, 0.1);
}
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-chip {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(18, 32, 40, 0.16);
  background: #f7fbfb;
  font-weight: 800;
  font-size: 13px;
}
.filter-chip.is-active,
.filter-chip:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.route-panels { position: relative; min-height: 120px; }
.route-card {
  display: none;
  padding: 18px 16px;
  background: linear-gradient(120deg, #eff7f7, #fff);
  border-left: 5px solid var(--accent);
}
.route-card.is-active { display: block; animation: fade-in 0.28s ease; }
.route-card h3 { margin: 0 0 8px; font-size: 20px; }
.route-card p { margin: 0; color: var(--mute); max-width: 640px; }

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

.path-section {
  padding: 68px 0;
  background: var(--rail);
  color: #e8f0f2;
}
.path-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
}
.path-rail { display: grid; gap: 12px; }
.path-rail li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.path-rail li.on {
  background: rgba(15, 138, 138, 0.28);
  border-color: var(--accent);
}
.path-rail b {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: #0d3d3d;
  color: #7fd4d0;
  font-size: 14px;
}
.path-rail strong { display: block; font-size: 18px; }
.path-rail em { color: #b7c8d0; font-style: normal; font-size: 13px; }
.path-phone { margin: 0; width: 188px; }
.path-phone img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  box-shadow: 8px 8px 0 rgba(15, 138, 138, 0.35);
}

.stills-section { padding: 68px 0; background: #f7fbfb; }
.still-stack {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  align-items: end;
}
.still-stack figure {
  margin: 0;
  padding: 12px;
  background: #fff;
  border: 1px solid rgba(18, 32, 40, 0.1);
}
.still-stack figure.offset { transform: translateY(-18px); }
.still-stack figure.tall { transform: translateY(10px); }
.still-stack img {
  width: 100%;
  max-width: 200px;
  height: auto;
  max-height: 420px;
  margin: 0 auto;
  object-fit: contain;
}
.still-stack figcaption {
  margin-top: 8px;
  text-align: center;
  font-size: 13px;
  font-weight: 800;
}

.guide-section {
  padding: 68px 0;
  background: #0f232c;
  color: #e8f0f2;
}
.faq-list { display: grid; gap: 8px; }
.faq-button {
  display: flex;
  width: 100%;
  min-height: 56px;
  align-items: center;
  padding: 0 16px;
  text-align: left;
  font-weight: 800;
  background: #16323d;
}
.faq-button:hover { color: #7fd4d0; }
.faq-item > div {
  padding: 0 16px 16px;
  color: #c5d5dc;
  background: #16323d;
}

.voice-section { padding: 68px 0; }
.voice-tape { display: grid; gap: 0; border-top: 2px solid var(--ink); }
.voice-tape article {
  display: grid;
  grid-template-columns: 180px 1fr 88px;
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid rgba(18, 32, 40, 0.14);
}
.voice-tape time {
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 800;
}
.voice-tape p { margin: 0; }
.voice-tape span { font-size: 13px; font-weight: 800; color: var(--mute); text-align: right; }

.get-section { padding: 36px 0 72px; }
.get-stamp {
  text-align: center;
  padding: 36px 24px;
  background: var(--sand);
  border: 2px dashed var(--accent-deep);
}
.get-stamp h2 { margin: 0 0 8px; font-size: 32px; }
.get-stamp p { margin: 0 0 18px; color: var(--mute); }
.get-stamp a { background: var(--rail); }

.site-footer {
  padding: 32px 0 18px;
  background: #08151a;
  color: #d5e2e6;
}
.footer-row {
  height: auto;
  padding-top: 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: flex-end;
  font-size: 13px;
  font-weight: 800;
}
.footer-nav a:hover { color: #7fd4d0; }
.copyright {
  width: min(calc(100% - 36px), 1120px);
  margin: 14px auto 0;
  color: #7d929a;
  font-size: 12px;
}

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  visibility: hidden;
  opacity: 0;
  background: var(--accent);
  transition: opacity 0.2s ease;
}
.back-top::before {
  content: "";
  width: 12px;
  height: 12px;
  border-left: 2px solid #fff;
  border-top: 2px solid #fff;
  transform: translateY(3px) rotate(45deg);
}
.back-top.is-visible { visibility: visible; opacity: 1; }

@media (max-width: 980px) {
  .header-shell { grid-template-columns: 1fr auto; }
  .header-get { display: none; }
  .mobile-actions { display: flex; }
  .primary-nav {
    position: fixed;
    top: var(--header-h);
    right: 0; left: 0;
    display: none;
    background: #f7fbfb;
    border-bottom: 1px solid rgba(18, 32, 40, 0.12);
    justify-self: stretch;
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 18px 16px;
  }
  .primary-nav a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid rgba(18, 32, 40, 0.1);
  }
  .hero-shell { display: flex; flex-direction: column; gap: 28px; }
  .hero-copy { text-align: center; }
  .intro { margin-inline: auto; }
  .hero-cta { justify-content: center; }
  .lattice-body, .path-layout, .still-stack, .voice-tape article, .footer-row {
    grid-template-columns: 1fr;
  }
  .tag-lattice figure, .path-phone { width: min(188px, 100%); margin-inline: auto; }
  .still-stack figure.offset,
  .still-stack figure.tall { transform: none; }
  .voice-tape span { text-align: left; }
  .hero-cta a, .get-stamp a { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .route-card.is-active { animation: none; }
}