:root {
  --brand: #155eef;
  --brand-strong: #0f3fb5;
  --accent: #16a34a;
  --ink: #111827;
  --muted: #4b5563;
  --line: #d9e2ec;
  --soft: #f5f7fb;
  --surface: #ffffff;
  --container: 1120px;
  --radius: 8px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --nav-height: 64px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
p { margin: 0 0 14px; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.narrow { max-width: 860px; }
.skip-link { position: absolute; top: 12px; left: 12px; transform: translateY(-140%); background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 10px; z-index: 100; }
.skip-link:focus { transform: translateY(0); outline: 2px solid var(--brand); }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.nav { height: var(--nav-height); display: flex; align-items: center; gap: 18px; width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 760; }
.brand-mark { display: inline-flex; width: 32px; height: 32px; align-items: center; justify-content: center; border-radius: var(--radius); background: var(--ink); color: white; font-size: 12px; letter-spacing: 0; }
.brand-name { font-size: 15px; white-space: nowrap; }
.nav-menu { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-link { color: var(--muted); font-size: 14px; padding: 8px 10px; border-radius: var(--radius); }
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--ink); background: var(--soft); }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 40px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); align-items: center; justify-content: center; flex-direction: column; gap: 4px; }
.nav-toggle-line { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }
.button { display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: var(--radius); padding: 10px 14px; font-size: 14px; font-weight: 680; cursor: pointer; transition: background .18s ease, border-color .18s ease, transform .12s ease; }
.button:active { transform: translateY(1px); }
.button-primary { background: var(--brand); color: white; }
.button-primary:hover { background: var(--brand-strong); }
.button-secondary { background: #eef4ff; color: var(--brand-strong); border-color: #c9dafd; }
.button-secondary:hover { background: #e1ebff; }
.nav-cta { margin-left: 6px; }
.breadcrumbs { background: #fbfcfe; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.breadcrumbs .container { display: flex; gap: 8px; align-items: center; min-height: 42px; flex-wrap: wrap; }
.breadcrumbs a { color: var(--brand); }
.hero, .page-hero { padding: 76px 0 58px; background: linear-gradient(180deg, #f7f9fd 0%, #ffffff 100%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr); gap: 42px; align-items: center; }
h1, h2, h3 { line-height: 1.22; letter-spacing: 0; }
h1 { margin: 0; font-size: clamp(34px, 5vw, 56px); max-width: 920px; }
h2 { margin: 0 0 12px; font-size: clamp(24px, 3vw, 34px); }
h3 { margin: 0 0 8px; font-size: 18px; }
.lead { margin-top: 18px; font-size: 18px; line-height: 1.78; color: var(--muted); max-width: 820px; }
.hero-actions { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-panel { border: 1px solid var(--line); border-radius: var(--radius); background: white; padding: 26px; box-shadow: var(--shadow); }
.hero-panel h2 { font-size: 24px; }
.label { margin: 0 0 8px; color: var(--brand); font-size: 13px; font-weight: 760; }
.text-link { color: var(--brand); font-weight: 700; }
.text-link:hover { text-decoration: underline; }
.section { padding: 68px 0; }
.section-muted { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-header { margin-bottom: 26px; }
.section-header p { color: var(--muted); max-width: 760px; }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: 1fr 420px; gap: 36px; align-items: start; }
.card, .case-card, .contact-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 24px; box-shadow: 0 4px 16px rgba(17,24,39,.04); }
.card p, .case-card p { color: var(--muted); }
.case-card { display: flex; justify-content: space-between; gap: 24px; align-items: center; }
.fact-list { border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.fact-list div { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.fact-list div:last-child { border-bottom: none; }
.fact-list span { color: var(--muted); }
.subnav { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.subnav .container { display: flex; gap: 8px; overflow-x: auto; padding-top: 10px; padding-bottom: 10px; }
.subnav a { flex: 0 0 auto; border: 1px solid var(--line); border-radius: var(--radius); padding: 7px 10px; font-size: 13px; color: var(--muted); background: #fff; }
.subnav a:hover { color: var(--ink); border-color: #b7c6d8; }
.data-table { width: 100%; border-collapse: collapse; margin: 22px 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: table; font-size: 15px; }
.data-table th, .data-table td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 14px 16px; }
.data-table th { width: 220px; background: #f8fafc; }
.data-table tr:last-child th, .data-table tr:last-child td { border-bottom: none; }
.check-list { margin: 14px 0 0; padding-left: 20px; color: var(--muted); }
.check-list li { margin: 7px 0; }
.note { margin-top: 22px; border-left: 4px solid var(--brand); background: #f3f7ff; padding: 16px 18px; border-radius: var(--radius); color: #20324d; }
.timeline { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.timeline li { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 16px 18px; display: grid; gap: 4px; }
.timeline strong { color: var(--ink); }
.timeline span { color: var(--muted); }
.timeline.large li { padding: 20px 22px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); background: white; padding: 22px; }
.faq-item h2 { font-size: 19px; margin-bottom: 10px; }
.faq-item p { color: var(--muted); margin: 0; }
.contact-section { background: #0f172a; color: white; }
.contact-section p { color: #d1d5db; }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: start; }
.contact-card { background: white; color: var(--ink); box-shadow: none; }
.contact-item { display: grid; grid-template-columns: 86px 1fr auto; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.contact-item span { color: var(--muted); font-size: 14px; }
.contact-item a { color: var(--brand); font-weight: 700; }
.contact-item button { border-radius: var(--radius); border: 1px solid var(--line); background: #fff; padding: 7px 10px; cursor: pointer; }
.qr-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; padding-top: 20px; }
.qr-card { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; background: #f8fafc; text-align: center; }
.qr-card img { display: block; width: 100%; max-width: 220px; aspect-ratio: 1 / 1; object-fit: contain; margin: 0 auto 10px; background: white; border-radius: 6px; }
.qr-card figcaption { color: var(--ink); font-weight: 700; line-height: 1.35; }
.footer { border-top: 1px solid var(--line); padding: 18px 0; background: #fff; }
.footer-inner { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.footer a:hover { color: var(--ink); text-decoration: underline; }
.toast { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); background: rgba(17,24,39,.94); color: white; border-radius: var(--radius); padding: 10px 14px; z-index: 80; box-shadow: var(--shadow); }

@media (max-width: 920px) {
  :root { --nav-height: 58px; }
  .nav-toggle { display: inline-flex; }
  .nav-menu { position: absolute; left: 20px; right: 20px; top: calc(var(--nav-height) + 8px); display: none; flex-direction: column; align-items: stretch; background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; box-shadow: var(--shadow); }
  .nav-menu[data-open="true"] { display: flex; }
  .nav-link, .nav-cta { width: 100%; }
  .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; }
  .grid.three, .grid.two { grid-template-columns: 1fr; }
  .case-card { align-items: flex-start; flex-direction: column; }
  .data-table { display: block; overflow-x: auto; }
  .contact-item { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .container, .nav { width: min(100% - 28px, var(--container)); }
  .hero, .page-hero, .section { padding: 48px 0; }
  .brand-name { font-size: 13px; }
  .hero-actions .button { width: 100%; }
  .fact-list div { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: 1fr; }
}