:root{
  --bg:#f4f7fb;--card:#ffffff;--ink:#182235;--muted:#61728a;--line:#dbe5f0;
  --brand:#0f4ea5;--brand2:#12356b;--soft:#eef5ff;--warm:#f8fbff;--accent:#0f61d6;
  --shadow:0 12px 30px rgba(16,47,94,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.88;-webkit-text-size-adjust:100%;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul,ol{padding-left:22px;margin:14px 0}
li+li{margin-top:9px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.topbar{
  background:linear-gradient(135deg,var(--brand2),var(--brand));
  color:#fff;padding:20px 0 16px;box-shadow:0 12px 32px rgba(14,77,164,.2)
}
.brandline{display:flex;justify-content:space-between;gap:20px;align-items:flex-end}
.site{font-size:30px;font-weight:800;letter-spacing:.4px}
.tagline{font-size:14px;opacity:.92}
.mainnav{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.mainnav a{
  color:#fff;padding:8px 14px;border-radius:999px;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08)
}
.hero{padding:30px 0 22px}
.hero-card{
  background:linear-gradient(180deg,#f9fbff,#eef5ff);
  border:1px solid #d8e6fb;border-radius:28px;padding:30px;
  box-shadow:0 18px 42px rgba(18,53,107,.08)
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.9fr);gap:22px;align-items:stretch}
.hero h1{margin:.36em 0 .3em;font-size:40px;line-height:1.2}
.lead{font-size:18px;color:#30415d}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;background:#dceafe;color:#204783;
  padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.3px
}
.mini-card,.card{
  background:var(--card);border:1px solid var(--line);border-radius:22px;
  box-shadow:var(--shadow)
}
.mini-card{padding:22px}
.card{padding:26px}
.card h2{margin:0 0 14px;font-size:28px;line-height:1.35}
.card h3{margin:18px 0 8px;font-size:20px;line-height:1.45}
.breadcrumb{font-size:14px;color:#61728a;margin-bottom:14px;word-break:break-word}
.breadcrumb a{color:#4d6b98}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start;padding:0 0 56px}
article,aside{min-width:0}
article{display:flex;flex-direction:column;gap:20px}
.sidebar-sticky{position:sticky;top:20px;display:flex;flex-direction:column;gap:20px}
.highlight{border-color:#c9dcf7;background:linear-gradient(180deg,#fff,#f8fbff)}
.cta-soft{background:linear-gradient(180deg,#fffdf9,#f8fbff)}
.contact-card{background:linear-gradient(135deg,#0d4da3,#143669);color:#fff;border:none}
.contact-card a{color:#fff;text-decoration:underline}
.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;min-width:560px;border-collapse:collapse;font-size:15px}
th,td{border:1px solid var(--line);padding:13px 14px;text-align:left;vertical-align:top}
th{background:#f4f8fd;font-weight:800}
.link-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.link-card,.simple-link{
  display:block;padding:14px 16px;border-radius:16px;border:1px solid #dbe5f0;background:#f7fafe;
  color:#27456c;min-width:0;word-break:break-word
}
.simple-link{padding:11px 13px;border-radius:14px}
.tile-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tile{
  display:block;padding:20px;border-radius:18px;border:1px solid #dde5f0;background:linear-gradient(180deg,#fff,#f9fbfe);
  min-height:130px;box-shadow:0 6px 18px rgba(16,47,94,.04)
}
.tile span{display:block;color:#223552;font-weight:700;line-height:1.55}
.tile strong{display:inline-block;margin-top:12px;color:#0f4da3;font-size:14px}
.stack{display:flex;flex-direction:column;gap:24px;padding-bottom:56px}
.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
.section-head p{margin:0;color:var(--muted)}
.rank-list{margin:0;padding-left:22px;columns:2;column-gap:30px}
.rank-list li{break-inside:avoid;margin-bottom:10px}
.meta-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.meta-pill{
  display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;
  background:#fff;border:1px solid #d9e3f0;color:#27456c;font-size:14px
}
.faq-item+.faq-item{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line)}
.note{margin-top:14px;padding:14px 16px;border-left:4px solid var(--brand);background:var(--soft);border-radius:0 14px 14px 0;color:#355276}
.footer{padding:30px 0 36px;color:#60718a}
.line{height:1px;background:#d8e2ee;margin-bottom:16px}
.footer p{margin:0;font-size:14px}
@media (max-width:1080px){
  .layout,.hero-grid{grid-template-columns:1fr}
  .sidebar-sticky{position:static}
}
@media (max-width:860px){
  .tile-grid,.link-grid{grid-template-columns:1fr 1fr}
  .site{font-size:26px}
}
@media (max-width:720px){
  .wrap{padding:0 14px}
  .topbar{padding:16px 0 14px}
  .brandline{display:block}
  .mainnav{gap:10px}
  .hero{padding:22px 0 18px}
  .hero-card,.card,.mini-card{padding:20px}
  .hero h1{font-size:30px}
  .card h2{font-size:24px}
  .tile-grid,.link-grid{grid-template-columns:1fr}
  .rank-list{columns:1}
  table{min-width:500px}
}