:root{--bg:#f5f2ea;--paper:#fffdf8;--ink:#1c201d;--muted:#666a64;--line:#dedbd2;--orange:#d85b35;--green:#245f4d;--navy:#20332c;--soft:#efe7dc;--radius:20px;--shadow:0 18px 50px rgba(31,36,32,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit}.site-head{position:sticky;top:0;z-index:10;background:rgba(245,242,234,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.head-in,.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.head-in{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:850}.brand-mark{width:40px;height:40px;border-radius:12px;background:var(--orange);color:#fff;display:grid;place-items:center;font-size:12px}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:.08em}.nav{display:flex;flex-wrap:wrap;gap:18px;font-size:13px}.nav a{text-decoration:none;color:var(--muted)}.nav a:hover{color:var(--orange)}.hero{padding:76px 0 58px}.eyebrow{color:var(--orange);font-size:12px;font-weight:850;letter-spacing:.16em;text-transform:uppercase}.hero h1{font-size:clamp(36px,6vw,68px);line-height:1.08;letter-spacing:-.045em;margin:16px 0 20px;max-width:920px}.hero p{font-size:18px;color:var(--muted);max-width:820px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 18px;border-radius:999px;text-decoration:none;font-weight:750;font-size:13px;border:1px solid var(--line);background:var(--paper)}.btn.primary{background:var(--orange);border-color:var(--orange);color:#fff}.notice{background:var(--navy);color:#f6f3eb;border-radius:var(--radius);padding:24px 28px;margin-bottom:28px}.notice strong{color:#ffb297}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:22px 0 52px}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow)}.card h2,.card h3{margin:0 0 10px;line-height:1.35}.card h3{font-size:17px}.card p,.card li{color:var(--muted);font-size:14px}.card ul{padding-left:20px}.section{padding:26px 0 58px}.section-head{display:grid;grid-template-columns:1fr 2fr;gap:30px;margin-bottom:24px}.section h2{font-size:32px;line-height:1.25;margin:0}.section-head p{margin:0;color:var(--muted)}.prose{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,5vw,52px);box-shadow:var(--shadow)}.prose h2{font-size:24px;margin:35px 0 10px}.prose h2:first-child{margin-top:0}.prose h3{margin:26px 0 7px}.prose p,.prose li{color:#50554f}.prose a{color:var(--orange)}.meta-table{width:100%;border-collapse:collapse;margin:20px 0}.meta-table th,.meta-table td{text-align:left;vertical-align:top;padding:13px;border-bottom:1px solid var(--line);font-size:14px}.meta-table th{width:220px;color:var(--muted)}.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}.flow div{background:var(--soft);border-radius:14px;padding:18px;font-size:13px}.flow b{display:block;margin-bottom:6px;color:var(--green)}.site-foot{border-top:1px solid var(--line);margin-top:64px;padding:34px 0 46px;color:var(--muted);font-size:12px}.foot-in{width:min(1120px,calc(100% - 40px));margin:auto;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.foot-links{display:flex;flex-wrap:wrap;gap:14px}.foot-links a{color:var(--muted)}.updated{display:inline-block;background:var(--soft);border-radius:999px;padding:5px 11px;font-size:12px;color:var(--muted)}
@media(max-width:780px){.head-in{align-items:flex-start;padding:14px 0;flex-direction:column}.nav{gap:12px}.hero{padding:46px 0 36px}.grid,.flow,.section-head{grid-template-columns:1fr}.meta-table th,.meta-table td{display:block;width:100%;padding:10px}.meta-table th{padding-bottom:0;border-bottom:0}.meta-table td{padding-top:3px}.prose{padding:24px}}