:root{--navy:#132a41;--ink:#17293c;--slate:#5b7085;--line:#d8e0e6;--gold:#aa8953;--paper:#f3f1ec;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.78}a{color:#245b85}a:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.help-topbar{position:sticky;top:0;z-index:10;background:rgba(233,238,243,.97);border-bottom:1px solid #c9d5df}.help-topbar-inner{width:min(1320px,100%);min-height:72px;margin:auto;padding:12px clamp(20px,4vw,54px);display:flex;align-items:center;justify-content:space-between;gap:20px}.help-brand{color:var(--navy);text-decoration:none;font-family:"Songti SC",serif;font-size:18px;font-weight:700}.help-brand span{display:block;color:#8c7042;font:700 9px ui-monospace,Consolas,monospace;letter-spacing:.18em}.help-topbar nav{display:flex;gap:8px}.help-topbar nav a{padding:8px 12px;text-decoration:none;white-space:nowrap;font-size:13px}.help-topbar nav .current{border:1px solid #af925f;background:#fff;color:var(--navy);font-weight:700}main{width:min(1320px,100%);margin:auto;padding:50px clamp(20px,4vw,54px) 70px}.help-hero{max-width:820px}.eyebrow{margin:0;color:var(--gold);font:700 11px ui-monospace,Consolas,monospace;letter-spacing:.18em}.help-hero h1{margin:12px 0;font:700 clamp(36px,5vw,56px)/1.25 "Songti SC",serif;color:var(--navy)}.help-hero p:last-child{font-size:16px;color:var(--slate);margin:0}.help-index{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:34px 0 36px}.help-index a{display:flex;flex-direction:column;gap:4px;min-height:120px;padding:18px 20px;background:var(--white);border:1px solid #cad6df;border-top:3px solid var(--gold);text-decoration:none;color:var(--navy);transition:transform .15s,box-shadow .15s}.help-index a:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(26,54,78,.1)}.help-index span{color:var(--gold);font:700 12px ui-monospace,Consolas,monospace}.help-index strong{font-size:20px}.help-index small{color:var(--slate);font-size:12px}.first-read,.guide-section,.help-boundary{background:var(--white);border:1px solid var(--line);border-top:3px solid var(--gold);padding:clamp(23px,3vw,38px);margin-bottom:26px}.first-read h2,.help-boundary h2{font-size:22px;color:var(--navy);margin:0 0 18px}.first-read-grid,.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.first-read-grid p{margin:0;padding:18px;background:#eef2f5;color:#405368;font-size:14px}.first-read-grid b{display:block;color:var(--navy);font-size:15px;margin-bottom:5px}.section-heading>span{color:var(--gold);font:700 11px ui-monospace,Consolas,monospace;letter-spacing:.18em}.section-heading h2{font:700 34px/1.3 "Songti SC",serif;color:var(--navy);margin:8px 0}.section-heading p{margin:0 0 24px;color:var(--slate);max-width:940px}.rule-card{padding:21px;background:#f3f6f8;border:1px solid #dce5eb;border-left:3px solid #8faec4}.rule-card:nth-child(2){border-left-color:var(--gold)}.rule-card h3{font-size:17px;color:var(--navy);margin:0 0 11px}.rule-card p,.short-card dd{margin:0;font-size:14px;color:#465a6d}.rule-card strong{color:var(--navy)}.section-note,.source-note{font-size:13px;color:#65798c;background:#f8f6f0;border-left:3px solid var(--gold);padding:10px 13px;margin:20px 0 0}.section-link{display:inline-flex;gap:9px;align-items:center;margin-top:22px;padding:9px 14px;background:#e5eef5;border:1px solid #a8bdce;color:#214f76;text-decoration:none;font-size:13px;font-weight:700}.section-link:hover{background:#d6e6f2}.short-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.short-card{border:1px solid #d6e0e8;background:#f4f7f9;padding:22px}.short-card h3{font-size:20px;margin:0 0 6px;color:var(--navy)}.short-intro{font-size:14px;color:var(--slate);margin:0 0 18px}.short-card dl{margin:0}.short-card dt{font-size:14px;font-weight:800;color:#896b3e;margin:12px 0 4px}.short-card dd{margin:0}.help-boundary{background:#e9eef3;border-top-color:#415d78}.help-boundary p{font-size:14px;color:#44596e;margin:0}.help-boundary a{white-space:nowrap}.help-footer{display:flex;justify-content:space-between;gap:20px;padding:24px clamp(20px,4vw,54px);border-top:1px solid var(--line);color:var(--slate);font-size:12px;max-width:1320px;margin:auto}
@media(max-width:900px){.help-index{grid-template-columns:repeat(2,minmax(0,1fr))}.rule-grid{grid-template-columns:1fr}.first-read-grid{grid-template-columns:1fr}.short-grid{grid-template-columns:1fr}}
@media(max-width:560px){.help-topbar-inner{align-items:flex-start;flex-direction:column;gap:5px}.help-topbar nav{width:100%}.help-topbar nav a{padding:6px 9px}.help-brand{font-size:15px}.help-index{gap:9px}.help-index a{padding:13px;min-height:106px}.help-index strong{font-size:16px}.help-index small{font-size:11px}main{padding-top:30px}.help-hero p:last-child{font-size:14px}.guide-section,.first-read,.help-boundary{padding:20px}.section-heading h2{font-size:28px}.help-footer{flex-direction:column;gap:4px}}