:root {
  --ink: #172033;
  --muted: #5c6778;
  --line: #e4ddd2;
  --paper: #f6f1e8;
  --card: #fffdf9;
  --navy: #12315c;
  --navy-deep: #0c2244;
  --teal: #1a7f72;
  --amber: #e39b12;
  --shadow: 0 16px 40px rgba(18, 49, 92, 0.08);
  --radius: 18px;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang HK", sans-serif;
  line-height: 1.65;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: #fff;
  padding: 8px 12px;
  z-index: 20;
}

.skip:focus { top: 12px; }

.wrap {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 241, 232, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(18, 49, 92, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 14px;
}

.nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  font-size: 14px;
}

.nav a { text-decoration: none; color: var(--muted); }

.nav a:hover { color: var(--navy); }

.lang-switch {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
}

.lang-switch button {
  border: 0;
  background: transparent;
  padding: 6px 12px;
  font: inherit;
  cursor: pointer;
  color: var(--muted);
}

.lang-switch button[aria-pressed="true"] {
  background: var(--navy);
  color: #fff;
}

.hero {
  background:
    radial-gradient(circle at 90% 10%, rgba(227, 155, 18, 0.22), transparent 32%),
    linear-gradient(160deg, var(--navy-deep), var(--navy) 55%, #1a5c68);
  color: #fff;
  padding: 72px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  letter-spacing: 0.08em;
  font-size: 12px;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; }

h1 { font-size: clamp(36px, 5vw, 58px); letter-spacing: -0.03em; }

.lede { font-size: 18px; color: rgba(255, 255, 255, 0.88); max-width: 38em; }

.hero-card {
  background: #fff;
  color: var(--ink);
  border-radius: 24px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.hero-card img { border-radius: 16px; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: -28px;
  position: relative;
}

.stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
}

.stat strong {
  display: block;
  font-size: 22px;
  color: var(--navy);
}

.stat span { color: var(--muted); font-size: 14px; }

section { padding: 72px 0; }

.section-title { font-size: clamp(28px, 3vw, 38px); }

.section-intro { color: var(--muted); max-width: 46em; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.panel img { width: 100%; }

.list {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.list li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.step {
  background: #fff;
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--line);
}

.step em {
  display: block;
  font-style: normal;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 8px;
}

.uses {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.use {
  background: var(--navy);
  color: #fff;
  border-radius: 18px;
  padding: 20px;
  min-height: 160px;
}

.use:nth-child(2n) { background: #1a5c68; }

.use:nth-child(3n) { background: #8a5a12; }

.use h3 { font-size: 20px; }

.use p { margin: 0; color: rgba(255, 255, 255, 0.9); }

.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.feature {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 18px 16px;
}

.feature h3 { font-size: 18px; }

.feature p { margin: 0; color: var(--muted); }

.flow {
  counter-reset: flow;
  display: grid;
  gap: 10px;
}

.flow li {
  list-style: none;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 16px;
}

.flow { margin: 0; padding: 0; }

.flow li::before {
  counter-increment: flow;
  content: counter(flow);
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--navy);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.shot {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}

.shot img { width: 100%; background: #eef2f6; }

.shot figcaption { padding: 12px 14px 14px; font-size: 14px; color: var(--muted); }

.shot strong { display: block; color: var(--ink); font-size: 16px; margin-bottom: 4px; }

.faq { display: grid; gap: 10px; }

details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 16px;
}

summary { cursor: pointer; font-weight: 650; }

details p { margin: 10px 0 0; color: var(--muted); }

.band {
  background: var(--navy);
  color: #fff;
  border-radius: 24px;
  padding: 28px;
}

.band p { margin: 0; color: rgba(255, 255, 255, 0.88); }

footer {
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

body[data-lang="zh"] .lang-en { display: none; }
body[data-lang="en"] .lang-zh { display: none; }

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; min-height: 0; padding: 10px 0; }
  .nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px 14px;
    margin-left: 0;
    padding-bottom: 8px;
  }
  .hero-grid,
  .split,
  .stats,
  .steps,
  .uses,
  .features,
  .gallery {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 40px; }
}