:root{--bg:#071313;--surface:#0e2223;--surface-2:#112d2e;--border:#254d4c;--text:#e6f7f3;--muted:#a8c3bf;--accent:#2fc7b8;--accent-2:#7ce4d3;--max:980px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 -apple-system,'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif}
a{color:var(--accent-2)}
.wrap{max-width:var(--max);margin:auto;padding:32px 24px 80px}
header{padding:8px 0 34px;border-bottom:1px solid var(--border)}
nav{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:42px;font-size:14px}
nav a{text-decoration:none;color:var(--muted)}
nav a:hover{color:var(--text)}
h1{font-size:clamp(30px,5vw,52px);line-height:1.16;margin:0 0 18px;max-width:860px}
h2{font-size:clamp(23px,3vw,32px);line-height:1.3;margin:46px 0 14px}
h3{font-size:19px;line-height:1.4;margin:28px 0 8px}
p{max-width:860px;color:#c7dcD8}
.lead{font-size:19px;color:var(--text);max-width:850px}
.meta{color:var(--muted);font-size:13px}
.note{padding:16px 18px;border:1px solid var(--border);border-left:3px solid var(--accent);background:rgba(17,45,46,.7);border-radius:8px}
.table-wrap{overflow-x:auto;margin:18px 0}
table{width:100%;border-collapse:collapse;background:var(--surface);min-width:680px}
th,td{text-align:left;padding:12px 14px;border:1px solid var(--border);vertical-align:top}
th{color:var(--text);background:var(--surface-2)}
td{color:#c7dcD8}
.faq{border-top:1px solid var(--border);margin-top:18px}
details{padding:14px 0;border-bottom:1px solid var(--border)}
summary{cursor:pointer;font-weight:700}
.callout{margin:28px 0;padding:22px;border-radius:10px;background:linear-gradient(135deg,rgba(47,199,184,.15),rgba(17,45,46,.7));border:1px solid rgba(47,199,184,.45)}
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.related a{display:inline-block;padding:7px 12px;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent-2);font-size:14px}
footer{margin-top:60px;padding-top:22px;border-top:1px solid var(--border);color:var(--muted);font-size:13px}
@media(max-width:700px){.wrap{padding:22px 16px 60px}.lead{font-size:17px}nav{margin-bottom:30px;gap:12px}table{min-width:600px}}