:root {
  --primary: #1768e8;
  --secondary: #19b7ff;
  --deep: #0c1f4a;
  --text: #172033;
  --muted: #64748b;
  --line: #e6ecf5;
  --bg: #f5f8fd;
  --white: #fff;
  --shadow: 0 18px 45px rgba(18, 52, 96, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 28px rgba(17, 38, 75, 0.06);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; min-height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 900; color: var(--primary); font-size: 20px; }
.brand img { width: 42px; height: 42px; border-radius: 12px; object-fit: cover; }
.nav-menu { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.nav-menu a { padding: 10px 14px; border-radius: 999px; color: #334155; font-size: 15px; }
.nav-menu a:hover { color: var(--primary); background: #edf5ff; }

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 82% 24%, rgba(255,255,255,.18), transparent 28%),
    linear-gradient(135deg, var(--primary), var(--secondary));
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .12;
  background-image:
    linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size: 54px 54px;
}
.hero-grid { position: relative; display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 38px; min-height: 620px; padding: 78px 0; }
.badge { display: inline-flex; padding: 8px 14px; border-radius: 999px; color: #eaf6ff; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.24); font-weight: 800; }
h1 { margin: 20px 0 16px; font-size: clamp(38px, 5vw, 66px); line-height: 1.08; letter-spacing: -.05em; }
.hero p { max-width: 720px; margin: 0; color: rgba(255,255,255,.9); font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 22px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 900; }
.btn.primary { color: var(--primary); background: #fff; box-shadow: 0 18px 45px rgba(0,0,0,.16); }
.btn.ghost { border: 1px solid rgba(255,255,255,.36); background: rgba(255,255,255,.12); color: #fff; }
.hero-list { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-list span { padding: 9px 12px; border-radius: 999px; border: 1px solid rgba(255,255,255,.26); background: rgba(255,255,255,.12); color: #eef8ff; }

.hero-visual { position: relative; min-height: 420px; }
.hero-visual img { width: 100%; height: 420px; display: block; object-fit: cover; border-radius: 28px; border: 1px solid rgba(255,255,255,.3); box-shadow: 0 24px 70px rgba(4, 24, 64, .32); }
.visual-card { position: absolute; padding: 14px 16px; border-radius: 18px; background: rgba(255,255,255,.94); color: var(--text); box-shadow: var(--shadow); }
.visual-card b, .visual-card span { display: block; }
.visual-card span { color: var(--muted); margin-top: 4px; }
.top-card { top: 24px; right: 24px; }
.bottom-card { left: 24px; bottom: 24px; }

.section { padding: 72px 0; }
.section-title { margin: 0 0 32px; text-align: center; font-size: clamp(28px, 3vw, 42px); }
.feature-grid, .user-grid, .stats-grid, .package-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card, .user-card, .article-card, .package-grid article, .faq-list article {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.feature-card span { color: var(--primary); font-weight: 900; }
.feature-card h3, .user-card h3 { margin: 12px 0; font-size: 22px; }
.feature-card p, .user-card li, .article-card p, .package-grid p, .faq-list p, .split p, .process span { color: var(--muted); line-height: 1.8; }
.alt { background: #fff; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; align-items: center; }
.split h2 { margin: 18px 0 14px; font-size: clamp(30px, 3vw, 44px); }
.text-link { display: inline-flex; margin-top: 14px; color: var(--primary); font-weight: 900; }
.process { display: grid; gap: 14px; }
.process div { padding: 22px; border-radius: 16px; border: 1px solid var(--line); background: #f7fbff; }
.process b, .process span { display: block; }
.process span { margin-top: 6px; }
.user-card ul { margin: 0; padding-left: 18px; }
.promo-grid { display: grid; grid-template-columns: 1.2fr .9fr; gap: 20px; }
.promo-card { position: relative; margin: 0; overflow: hidden; min-height: 250px; border-radius: 22px; box-shadow: var(--shadow); background: #fff; }
.promo-card img { width: 100%; height: 100%; min-height: 250px; display: block; object-fit: cover; }
.promo-card.large { grid-row: span 2; min-height: 520px; }
.promo-card.large img { min-height: 520px; }
.promo-card figcaption { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 13px 15px; border-radius: 14px; color: #fff; background: rgba(8,24,52,.72); backdrop-filter: blur(12px); }
.stats { padding: 54px 0; color: #fff; background: linear-gradient(135deg, var(--deep), var(--primary)); }
.stats-grid div { text-align: center; padding: 26px; border-radius: 18px; background: rgba(255,255,255,.12); }
.stats-grid b { display: block; font-size: 36px; }
.stats-grid span { color: rgba(255,255,255,.86); }
.footer { padding: 34px 0; color: #64748b; background: #fff; border-top: 1px solid var(--line); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; text-align: center; }
.footer a { color: var(--primary); }

.page { padding: 64px 0; }
.page h1 { color: var(--text); }
.package-grid article.featured { border: 2px solid var(--primary); transform: translateY(-6px); }
.faq-list { display: grid; gap: 18px; }

@media (max-width: 900px) {
  .nav-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav-menu { justify-content: flex-start; }
  .hero-grid, .split, .feature-grid, .user-grid, .stats-grid, .package-grid { grid-template-columns: 1fr; }
  .promo-grid { grid-template-columns: 1fr; }
  .promo-card.large, .promo-card.large img { min-height: 300px; }
}

@media (max-width: 560px) {
  .container { width: min(100% - 26px, 1180px); }
  h1 { font-size: 36px; }
  .hero-grid { padding: 48px 0; }
  .hero-visual img { height: 300px; }
  .visual-card { position: static; margin-top: 12px; }
  .section { padding: 46px 0; }
}