:root{--red:#FF4B3E;--ink:#0B0B0D;--paper:#F4F1EA;--white:#fff;--muted:#514F4A;--line:#B9B5AD}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:18px;line-height:1.85}a{color:inherit;text-underline-offset:5px}a:hover{color:#B5251C}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--red);outline-offset:5px}h1,h2,h3,p,ul{margin-top:0}h1,h2,h3{font-weight:800;line-height:1.25;letter-spacing:-.035em}h1{font-size:clamp(40px,5.7vw,76px);max-width:960px;margin-bottom:30px}h2{font-size:clamp(28px,3vw,42px);margin-bottom:24px}h3{font-size:24px;margin-bottom:14px}p{margin-bottom:22px}ul{padding-left:1.3em}li{padding-left:4px;margin:10px 0}strong{font-weight:800}button{font:inherit}img{max-width:100%;height:auto}.shell{width:min(1240px,calc(100% - 80px));margin:auto}.skip{position:absolute;left:20px;top:-100px;background:var(--ink);color:white;padding:12px;z-index:9}.skip:focus{top:10px}.site-header{border-bottom:2px solid var(--ink)}.head{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:24px 0}.brand{text-decoration:none;display:flex;gap:14px;align-items:center}.brand-mark{width:40px;height:40px;background:transparent;display:block;object-fit:contain}.brand-name{font-size:24px;font-weight:800;line-height:1.25}.brand-name span{display:block;font-size:18px;font-weight:500;letter-spacing:.09em}.nav{display:flex;flex-wrap:wrap;gap:12px 26px}.nav a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}.nav a[aria-current="page"]{border-bottom:3px solid var(--red)}.hero{padding:70px 0 56px;border-bottom:2px solid var(--ink);position:relative}.eyebrow{display:flex;align-items:center;gap:12px;letter-spacing:.06em;font-weight:700;margin-bottom:26px;font-size:18px}.eyebrow:before{content:"";width:18px;height:18px;background:var(--red);flex:0 0 18px}.lead{font-size:22px;line-height:1.8;max-width:930px;margin-bottom:28px}.meta{display:flex;flex-wrap:wrap;gap:12px 26px;color:var(--muted);font-size:18px}.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;border:2px solid var(--ink);padding:9px 20px;background:transparent;color:var(--ink);text-decoration:none;font-weight:700;cursor:pointer;border-radius:0}.btn.red{background:var(--red)}.btn:hover{background:var(--ink);color:var(--paper)}.takeaways{display:grid;grid-template-columns:repeat(3,1fr);gap:0;padding:0;list-style:none;border:2px solid var(--ink);margin:40px 0 0}.takeaways li{margin:0;padding:22px;display:flex;gap:16px;line-height:1.6}.takeaways li+li{border-left:1px solid var(--ink)}.num{font-size:28px;font-weight:900;color:#B5251C}.reading{display:grid;grid-template-columns:240px minmax(0,1fr);gap:60px;padding-top:60px;padding-bottom:70px}.toc{position:sticky;top:28px;align-self:start;border-top:6px solid var(--red);padding-top:18px}.toc h2{font-size:22px;letter-spacing:0;margin-bottom:16px}.toc ol{margin:0;padding:0 0 0 1.4em}.toc li{padding:0;margin:12px 0}.toc a{text-decoration:none;font-size:18px;line-height:1.55}.toc a:hover{text-decoration:underline}.article{min-width:0}.article section{padding-bottom:50px;margin-bottom:50px;border-bottom:1px solid var(--line)}.article section:last-child{margin-bottom:0}.note{border-left:6px solid var(--red);background:#E9E5DC;padding:22px 24px;margin:28px 0}.note strong{display:block;margin-bottom:8px}.note p{margin:0}.table-wrap{max-width:100%;overflow-x:auto;margin:30px 0;border:1px solid var(--ink);background:#FAF8F3}table{border-collapse:collapse;width:100%;min-width:640px;text-align:left;font-size:18px;line-height:1.7}caption{caption-side:top;text-align:left;background:var(--ink);color:var(--paper);font-weight:700;padding:16px 18px}th,td{padding:17px 18px;border-bottom:1px solid var(--line);vertical-align:top;min-width:130px}th{background:#E7E2D8;font-weight:800}tr:last-child td{border-bottom:0}td:first-child{font-weight:700}tbody tr:nth-child(even){background:#F0ECE3}.check-panel{border:2px solid var(--ink);padding:28px;margin:30px 0;background:#FAF8F3}.check-hint{color:var(--muted);font-size:18px}.checks label{display:flex;gap:14px;padding:17px 0;cursor:pointer;align-items:flex-start;border-bottom:1px solid var(--line)}.checks label:last-child{border-bottom:0}.checks input{width:22px;height:22px;margin:6px 0 0;flex:0 0 22px;accent-color:var(--ink);cursor:pointer}.checks input:checked+span{color:var(--muted)}.faq details{border-top:1px solid var(--ink)}.faq details:last-child{border-bottom:1px solid var(--ink)}.faq summary{padding:22px 38px 22px 0;cursor:pointer;font-weight:700;position:relative;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"＋";position:absolute;right:0;top:20px;color:#B5251C}.faq details[open] summary:after{content:"−"}.faq details>div{padding:0 0 6px}.related{padding:48px 0 60px;background:var(--ink);color:var(--paper)}.related h2{margin-bottom:24px}.related-links{display:flex;flex-wrap:wrap;gap:14px}.related a{border:1px solid var(--paper);padding:14px 20px;text-decoration:none;min-height:52px}.related a:hover{background:var(--red);color:var(--ink)}.site-footer{padding:36px 0;border-top:1px solid var(--line)}.footer-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px}.site-footer p{margin:0;color:var(--muted);font-size:18px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}.guide-card{border:2px solid var(--ink);padding:28px;display:flex;flex-direction:column;color:inherit;text-decoration:none;background:#FAF8F3}.guide-card:hover{background:#E9E5DC;color:var(--ink)}.guide-card .code{display:flex;justify-content:space-between;font-weight:700;border-bottom:1px solid var(--ink);padding-bottom:20px;margin-bottom:30px;color:#B5251C}.guide-card h3{font-size:30px;min-height:76px}.guide-card p{flex:1}.guide-card ul{font-size:18px;line-height:1.65}.guide-card .arrow{display:block;margin-top:20px;font-weight:700}.hub-section{padding:60px 0;border-bottom:1px solid var(--line)}.hub-note{display:grid;grid-template-columns:1fr 1fr;gap:40px}.hub-note p:last-child{margin-bottom:0}.topline{display:flex;justify-content:space-between;gap:24px;align-items:flex-start}.print-note{color:var(--muted);font-size:18px}.breadcrumb{font-size:18px;margin-bottom:22px}.breadcrumb a{text-decoration:none}.breadcrumb span{padding:0 10px;color:var(--muted)}
@media(max-width:1000px){.shell{width:calc(100% - 48px)}.head{align-items:flex-start;gap:20px;flex-direction:column}.reading{grid-template-columns:200px minmax(0,1fr);gap:36px}.guide-grid{grid-template-columns:1fr}.guide-card h3{min-height:0}.takeaways li{padding:18px}.takeaways{grid-template-columns:1fr}.takeaways li+li{border-left:0;border-top:1px solid var(--ink)}.guide-card{padding:26px}.hub-note{grid-template-columns:1fr;gap:24px}}
@media(max-width:720px){.shell{width:calc(100% - 36px)}.hero{padding:40px 0}.lead{font-size:20px}.head{padding:18px 0}.nav{gap:5px 22px}.brand-name{font-size:24px}.reading{display:block;padding-top:30px;padding-bottom:40px}.toc{position:static;padding:20px;border:2px solid var(--ink);border-top:6px solid var(--red);margin-bottom:40px;background:#FAF8F3}.toc ol{display:grid;gap:4px}.toc li{margin:4px 0}.toc a{display:inline-block;min-height:42px;padding:5px 0}.article section{padding-bottom:34px;margin-bottom:34px}h1{font-size:42px;line-height:1.18;margin-bottom:24px}h2{font-size:30px}h3{font-size:24px}.check-panel{padding:20px}.note{padding:20px}.table-wrap{margin:24px 0}th,td{padding:14px}.actions .btn{flex:1 1 auto}.hub-section{padding:42px 0}.related{padding:36px 0}.related-links{flex-direction:column}.topline{display:block}.guide-card h3{font-size:30px}.meta{display:grid;gap:4px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white;color:black;font-size:12pt;line-height:1.65}.shell{width:100%}.site-header,.toc,.actions,.related,.nav,.skip{display:none}.hero{padding:0 0 20px}.hero h1{font-size:28pt}.lead{font-size:14pt}.reading{display:block;padding:25px 0}.article section{margin-bottom:24px;padding-bottom:24px;break-inside:auto}.article h2{font-size:20pt;break-after:avoid}.article h3{font-size:16pt}.table-wrap{overflow:visible;break-inside:auto}table{min-width:0;font-size:11pt;line-height:1.5}th,td{min-width:0;padding:8px}tr{break-inside:avoid}.check-panel{break-inside:avoid}.checks input{appearance:auto}.takeaways{display:block}.takeaways li+li{border-left:0;border-top:1px solid black}.site-footer{padding:20px 0}.site-footer p{font-size:10pt}.faq details>div{display:block}.faq summary:after{display:none}.note{background:#f3f3f3}a{color:black}.guide-grid{display:block}.guide-card{break-inside:avoid;margin-bottom:20px}}