:root{--ink:#0d1117;--muted:#5b6673;--line:#e3e8ef;--accent:#0b63ff;--bg:#ffffff;--soft:#f5f7fa}
*{box-sizing:border-box}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg)}
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:9}
nav{max-width:1040px;margin:0 auto;padding:14px 20px;display:flex;gap:22px;align-items:center;flex-wrap:wrap}
nav .brand{font-weight:800;letter-spacing:.14em;margin-right:auto;font-size:15px}
nav a{color:var(--muted);text-decoration:none;font-size:14px}
nav a:hover{color:var(--ink)}
main{max-width:1040px;margin:0 auto;padding:0 20px 80px}
.hero{padding:72px 0 56px;border-bottom:1px solid var(--line)}
h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 18px;letter-spacing:-.02em}
h2{font-size:24px;margin:52px 0 14px;letter-spacing:-.01em}
h3{font-size:17px;margin:30px 0 8px}
p{margin:0 0 14px}
.lead{font-size:19px;color:#2b3441;max-width:760px}
.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:12px}
.answer{background:var(--soft);border-left:3px solid var(--accent);padding:16px 20px;margin:22px 0;font-size:17px}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
td.num{font-variant-numeric:tabular-nums}
.card{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:24px 0}
.card>div{border:1px solid var(--line);border-radius:10px;padding:18px}
.card b{display:block;font-size:22px;margin-bottom:6px}
ul{padding-left:20px}li{margin-bottom:8px}
.faq h3{margin-top:34px}
.note{font-size:13px;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:34px 20px;color:var(--muted);font-size:13px}
footer .in{max-width:1040px;margin:0 auto}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:12px 22px;border-radius:8px;font-weight:600;font-size:15px;margin:8px 10px 8px 0}
.tbd{background:#fff3cd;padding:1px 6px;border-radius:3px;font-size:.92em}

/* ---------- 图片与首屏 ---------- */
nav .brand img{height:22px;display:block}
.hero2{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;padding:56px 0 40px;border-bottom:1px solid var(--line)}
.hero2 .copy h1{font-size:clamp(30px,4.2vw,50px)}
.hero2 figure{margin:0}
.hero2 img{width:100%;height:auto;border-radius:14px;display:block;background:#000}
@media (max-width:820px){.hero2{grid-template-columns:1fr;gap:22px;padding:34px 0}}
figure{margin:26px 0}
figure img{width:100%;height:auto;display:block;border-radius:12px;background:#000}
figcaption{font-size:13px;color:var(--muted);margin-top:9px;line-height:1.5}
.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;margin:44px 0}
.split.rev>figure{order:2}
@media (max-width:820px){.split{grid-template-columns:1fr;gap:18px}.split.rev>figure{order:0}}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:26px 0}
.gallery img{width:100%;height:auto;border-radius:10px;display:block;background:#000}
.darkband{background:#0d1117;color:#fff;border-radius:16px;padding:34px 30px;margin:44px 0}
.darkband h2{color:#fff;margin-top:0}
.darkband p{color:#c9d3de}
.darkband .answer{background:#161d26;border-left-color:#3b82f6;color:#e6edf5}