:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --ink: #172033;
  --muted: #657087;
  --line: #dbe3ef;
  --brand: #1859c9;
  --brand-strong: #103f95;
  --accent: #0d7a67;
  --warning: #8a4b08;
  --warning-bg: #fff7e8;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand-strong); }

.site-header {
  background:
    radial-gradient(circle at 90% 0%, rgba(255,255,255,0.22), transparent 28rem),
    linear-gradient(135deg, #103f95 0%, #1859c9 58%, #0d7a67 130%);
  color: #fff;
  padding: 30px 0 48px;
}

.shell { width: min(1120px, calc(100% - 36px)); margin: 0 auto; }

.header-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 13px; font-weight: 750; letter-spacing: .01em; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.28);
  font-size: 15px; font-weight: 800;
}
.brand small { display: block; font-weight: 500; opacity: .82; letter-spacing: 0; }

.topnav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.topnav a {
  color: #fff; text-decoration: none; font-size: 14px; font-weight: 650;
  padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.16);
}
.topnav a:hover { background: rgba(255,255,255,.22); color: #fff; }

.hero { margin-top: 48px; max-width: 850px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: rgba(255,255,255,.88);
}
.hero h1 { margin: 12px 0 10px; font-size: clamp(34px, 5vw, 56px); line-height: 1.12; letter-spacing: -.035em; }
.hero p { margin: 0; max-width: 760px; color: rgba(255,255,255,.86); font-size: 17px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.meta-pill {
  max-width: 100%; overflow-wrap: anywhere;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 11px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.94); font-size: 13px;
}

.page { margin-top: -26px; padding-bottom: 60px; }
.panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.intro-card { padding: 24px 26px; margin-bottom: 22px; }
.intro-card p { margin: 0; color: var(--muted); }

.layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 22px; align-items: start; }
.layout > * { min-width: 0; }
.hero p, .intro-card p { overflow-wrap: anywhere; }
.toc {
  position: sticky; top: 18px; padding: 20px;
}
.toc strong { display: block; font-size: 14px; margin-bottom: 10px; }
.toc ol { margin: 0; padding-left: 20px; color: var(--muted); }
.toc li { margin: 6px 0; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--brand); }

main.panel { padding: 34px 38px 42px; }
article section { scroll-margin-top: 24px; margin-top: 34px; }
article section:first-child { margin-top: 0; }
h2 { margin: 0 0 14px; font-size: 24px; line-height: 1.35; letter-spacing: -.02em; }
h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 10px 0; }
ul, ol { margin: 10px 0 10px 1.2rem; padding: 0; }
li { margin: 6px 0; }

.summary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.summary-card {
  padding: 16px; border-radius: 14px; background: var(--surface-soft); border: 1px solid #d7e4ff;
}
.summary-card strong { display: block; margin-bottom: 3px; }
.summary-card span { color: var(--muted); font-size: 14px; }

.callout {
  margin: 18px 0; padding: 16px 18px; border-radius: 14px;
  background: var(--warning-bg); border: 1px solid #f1d7a9; color: #5c3a0c;
}
.callout strong { color: var(--warning); }

.table-wrap { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; min-width: 720px; background: #fff; }
th, td { padding: 13px 15px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: #f7f9fd; font-size: 14px; color: #39455d; }
tr:last-child td { border-bottom: 0; }
td { font-size: 14px; }

.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.badge { padding: 6px 10px; border-radius: 999px; background: #edf7f4; color: #0d6b5a; font-size: 13px; font-weight: 650; }

.home-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.doc-card { padding: 26px; display: flex; flex-direction: column; min-height: 250px; }
.doc-card .icon { font-size: 24px; margin-bottom: 18px; }
.doc-card h2 { font-size: 23px; }
.doc-card p { color: var(--muted); }
.doc-card .actions { margin-top: auto; padding-top: 20px; display: flex; flex-wrap: wrap; gap: 10px; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 9px 15px; border-radius: 11px;
  color: #fff; background: var(--brand); text-decoration: none; font-weight: 700; font-size: 14px;
}
.button:hover { color: #fff; background: var(--brand-strong); }
.button.secondary { color: var(--brand); background: #edf4ff; }
.button.secondary:hover { color: var(--brand-strong); background: #dfeaff; }

.notice { padding: 17px 18px; border-left: 4px solid var(--brand); background: #f2f7ff; border-radius: 0 12px 12px 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.nowrap { white-space: nowrap; }

footer.site-footer { padding: 0 0 40px; color: var(--muted); font-size: 13px; }
footer.site-footer .shell { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 850px) {
  .header-row { display: block; }
  .topnav { justify-content: flex-start; margin-top: 20px; }
  .layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  main.panel { padding: 28px 22px 34px; }
  .summary-grid, .home-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 24px, 1120px); }
  .site-header { padding-top: 20px; }
  .hero { margin-top: 32px; }
  .hero h1 { font-size: 36px; }
  .page { margin-top: -18px; }
  .intro-card { padding: 20px; }
  .doc-card { min-height: auto; padding: 22px; }
}

@media print {
  body { background: #fff; }
  .site-header, .toc, .topnav, .actions, footer.site-footer { display: none !important; }
  .shell { width: 100%; }
  .page { margin: 0; }
  .panel { box-shadow: none; border: 0; }
  main.panel { padding: 0; }
  a { color: inherit; text-decoration: none; }
}