:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5d687a;
  --line: #e3e8f0;
  --brand: #12315f;
  --accent: #2f67d8;
  --soft: #eaf1ff;
  --warning: #f7c948;
  --radius: 22px;
  --shadow: 0 18px 40px rgba(18, 49, 95, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 248, 251, .96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 14px 20px;
}
.logo-wrap { flex: 0 0 auto; }
.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  font-size: 14px;
  color: var(--muted);
}
.main-nav a { padding: 6px 8px; border-radius: 10px; }
.main-nav a:hover { background: var(--soft); color: var(--brand); }
.nav-cta, .primary-btn, .secondary-btn, .plain-button, .fake-search button {
  border: 0;
  border-radius: 999px;
  padding: 11px 18px;
  cursor: pointer;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.nav-cta, .primary-btn, .fake-search button {
  margin-left: auto;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px rgba(18, 49, 95, .18);
}
.secondary-btn, .plain-button { background: var(--soft); color: var(--brand); }
.nav-cta:hover, .primary-btn:hover, .secondary-btn:hover, .plain-button:hover, .fake-search button:hover { transform: translateY(-2px); }
.fake-search {
  max-width: 1180px;
  margin: 0 auto 12px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 10px;
  align-items: center;
}
.fake-search label { font-weight: 700; color: var(--brand); }
.fake-search input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 12px 16px;
  background: #fff;
  outline: none;
}
.search-notice { grid-column: 2 / 4; color: var(--muted); font-size: 14px; }
main { max-width: 1180px; margin: 0 auto; padding: 26px 20px 70px; }
.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 30px;
  align-items: center;
  padding: 42px;
  background: linear-gradient(135deg, #fff, #eef4ff);
  border: 1px solid var(--line);
  border-radius: 34px;
  box-shadow: var(--shadow);
}
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: .04em; }
h1, h2, h3 { line-height: 1.25; color: var(--brand); margin: 0 0 14px; }
h1 { font-size: clamp(34px, 5vw, 56px); }
h2 { font-size: clamp(25px, 3vw, 36px); }
h3 { font-size: 21px; }
p { margin: 0 0 14px; color: var(--muted); }
.hero-actions, .button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.hero-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 18px;
}
.hero-card img { border-radius: 22px; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.stat { background: var(--soft); border-radius: 18px; padding: 14px; text-align: center; }
.stat strong { display: block; color: var(--brand); font-size: 22px; }
section { margin-top: 54px; }
.section-head { max-width: 780px; margin-bottom: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card, .video-card, .quote-card, .log-item, .contact-panel, .json-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 12px 28px rgba(18, 49, 95, .06);
}
.tag { display: inline-block; background: var(--soft); color: var(--accent); padding: 5px 10px; border-radius: 999px; font-size: 13px; font-weight: 700; margin-bottom: 12px; }
.media-image { border-radius: 24px; border: 1px solid var(--line); }
.video-card { padding: 0; overflow: hidden; }
.video-box { position: relative; aspect-ratio: 16 / 9; background: #dfe8f7; overflow: hidden; }
.video-box video, .video-box img { width: 100%; height: 100%; object-fit: cover; }
.play-button {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%) scale(.9);
  width: 70px; height: 70px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(18,49,95,.88);
  color: #fff;
  opacity: 0;
  transition: .22s ease;
  box-shadow: 0 12px 30px rgba(0,0,0,.24);
}
.video-card:hover .play-button, .video-card.is-hover .play-button { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-content { padding: 18px; }
.video-stats { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 14px; }
.timeline { display: grid; gap: 14px; }
.log-item { display: grid; grid-template-columns: 120px 1fr; gap: 16px; align-items: start; }
.log-date { font-weight: 800; color: var(--accent); }
.faq-list details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 18px;
  margin-bottom: 12px;
}
.faq-list summary { cursor: pointer; font-weight: 800; color: var(--brand); }
.quote-card .score { color: var(--accent); font-weight: 800; }
.breadcrumb { color: var(--muted); margin-bottom: 18px; font-size: 14px; }
.breadcrumb a { color: var(--accent); }
.page-hero { background: #fff; border: 1px solid var(--line); border-radius: 30px; padding: 34px; box-shadow: var(--shadow); }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding-left: 58px; }
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--brand); color: #fff; display: grid; place-items: center; font-weight: 800;
}
.contact-panel form { display: grid; gap: 12px; }
.contact-panel input, .contact-panel textarea, .contact-panel select {
  width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; font: inherit;
}
.contact-panel textarea { min-height: 130px; }
.json-panel pre { max-height: 320px; overflow: auto; background: #0f172a; color: #dbeafe; padding: 16px; border-radius: 16px; font-size: 13px; }
.site-footer { background: #0f1f3a; color: #fff; padding: 44px 20px 24px; }
.footer-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.site-footer h2 { color: #fff; font-size: 20px; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.78); }
.site-footer a { display: block; margin-bottom: 8px; }
.copyright { max-width: 1180px; margin: 26px auto 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.18); color: rgba(255,255,255,.72); font-size: 14px; }
@media (max-width: 900px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .nav-cta { margin-left: 0; }
  .fake-search, .hero, .grid-3, .grid-2, .footer-grid { grid-template-columns: 1fr; }
  .search-notice { grid-column: auto; }
  .hero { padding: 26px; }
  .log-item { grid-template-columns: 1fr; }
}