:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #dbe2ea;
  --brand: #2157d6;
  --brand-soft: #e8efff;
  --accent: #0f766e;
  --shadow: 0 10px 30px rgba(31, 41, 55, 0.08);
  --radius: 12px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(33, 87, 214, 0.08), transparent 32%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.shell { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.topbar {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(248, 251, 255, 0.86);
  border-bottom: 1px solid rgba(219, 226, 234, 0.9);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #4f8cff);
  box-shadow: var(--shadow);
  display: grid; place-items: center; color: white; font-weight: 800;
}
.brand small { display: block; color: var(--muted); font-weight: 500; }
.nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.nav a {
  padding: 10px 14px; border-radius: 999px; color: var(--muted); border: 1px solid transparent;
}
.nav a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); border-color: rgba(33, 87, 214, 0.16); }
.hero { padding: 54px 0 24px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 20px; align-items: stretch; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-main { padding: 32px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px;
  border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 14px; font-weight: 600;
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 18px 0 14px; font-size: clamp(30px, 4vw, 48px); line-height: 1.12; }
.lead { font-size: 18px; color: var(--muted); max-width: 58ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
  padding: 0 18px; border-radius: 10px; border: 1px solid transparent; font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: white; box-shadow: 0 8px 18px rgba(33, 87, 214, 0.24); }
.btn-secondary { background: white; color: var(--brand); border-color: rgba(33, 87, 214, 0.2); }
.hero-side { padding: 24px; display: grid; gap: 14px; }
.info-block { padding: 16px; border-radius: 10px; border: 1px solid var(--line); background: #fbfdff; }
.info-block strong { display: block; margin-bottom: 4px; color: var(--accent); }
.section { padding: 22px 0 10px; }
.section h2 { margin-bottom: 12px; font-size: 24px; }
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 22px; }
.card h3 { margin-bottom: 8px; font-size: 18px; }
.card p { color: var(--muted); }
.list { display: grid; gap: 10px; padding: 0; margin: 16px 0 0; list-style: none; }
.list li { padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.table { width: 100%; border-collapse: collapse; overflow: hidden; }
.table th, .table td { padding: 14px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table th { color: var(--muted); font-weight: 600; background: #f9fbff; }
.form-card { padding: 28px; }
.field { display: grid; gap: 8px; margin-bottom: 16px; }
.field label { font-weight: 600; }
.field input, .field textarea {
  width: 100%; padding: 13px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: #fff; color: var(--text); font: inherit;
}
.field textarea { min-height: 140px; resize: vertical; }
.muted { color: var(--muted); }
.footer { padding: 30px 0 36px; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); padding-top: 20px; }
@media (max-width: 900px) {
  .hero-grid, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .topbar-inner, .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .shell { width: min(var(--max), calc(100% - 24px)); }
  .hero-main, .hero-side, .card, .form-card { padding: 20px; }
  .nav a { padding: 9px 12px; }
}