:root{color-scheme:dark;--bg:#080A0D;--nav:rgba(8,10,13,.96);--surface:#0D1015;--sub:#12161C;--sub2:#171C23;--hover:#1B2129;--title:#F5F7FA;--body:#C7CDD5;--muted:#9098A3;--blue:#5C7CFA;--blue2:#6EA8FF;--ice:#8ED8FF;--purple:#7775FF;--border:rgba(255,255,255,.09);--border-strong:rgba(255,255,255,.16)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--blue2);text-underline-offset:3px}a:hover{color:var(--ice)}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid var(--ice);outline-offset:3px;border-radius:4px}h1,h2,h3{color:var(--title);line-height:1.4;margin:0 0 .7em}h1{font-size:clamp(28px,3vw,36px)}h2{font-size:24px}h3{font-size:19px}p{margin:0 0 16px}ul,ol{padding-left:24px}li{margin-bottom:8px}.site-header{position:sticky;top:0;z-index:100;background:var(--nav);border-bottom:1px solid var(--border);backdrop-filter:blur(9px)}.header-inner{height:68px;max-width:1200px;margin:auto;padding:0 24px;display:flex;gap:20px;align-items:center}.logo{display:flex;align-items:center;max-width:154px;min-width:100px;text-decoration:none;font-size:22px;font-weight:800;color:var(--title)}.logo img{display:block;height:34px;width:auto;max-width:154px;object-fit:contain}.desktop-nav{display:flex;align-items:center;gap:19px;flex:1;min-width:0;white-space:nowrap}.desktop-nav a{font-size:14px;text-decoration:none;color:var(--body)}.desktop-nav a[aria-current],.desktop-nav a:hover{color:var(--blue2)}.menu-toggle,.menu-close{background:var(--sub2);color:var(--title);border:1px solid var(--border-strong);border-radius:8px;padding:8px 12px;white-space:nowrap}.entry-button{background:var(--blue);color:#fff;text-decoration:none;border-radius:8px;padding:8px 13px;font-size:14px;font-weight:700;white-space:nowrap}.entry-button:hover{background:#4669ec;color:white}.content-shell{max-width:1200px;margin:auto;padding:0 24px}.utility-link{text-align:right;padding:8px 0 0;font-size:13px}.utility-link a{color:var(--muted)}.main-content{padding:16px 0 64px;min-height:60vh}.menu-overlay[hidden],.menu-panel[hidden],.back-top[hidden]{display:none!important}.menu-overlay{position:fixed;inset:0;z-index:102;background:rgba(0,0,0,.65)}.menu-panel{position:fixed;z-index:103;top:69px;left:50%;width:min(1100px,calc(100vw - 40px));transform:translateX(-50%);background:var(--sub);border:1px solid var(--border-strong);box-shadow:0 20px 45px rgba(0,0,0,.45);border-radius:12px;padding:18px;max-height:75vh;overflow-y:auto}.menu-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.menu-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.menu-groups section{background:var(--surface);padding:14px;border-radius:8px}.menu-groups h2{font-size:16px;margin-bottom:6px}.menu-groups ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 10px}.menu-groups li{margin:0}.menu-groups a{text-decoration:none;font-size:14px}.menu-map{display:inline-block;margin:12px 0 0}.breadcrumb{font-size:13px;color:var(--muted);margin:14px 0 20px}.breadcrumb a{text-decoration:none}.page-intro{border-bottom:1px solid var(--border);padding:7px 0 25px;margin-bottom:17px}.page-intro>p:last-child{max-width:810px;font-size:17px;margin:0;color:var(--body)}.eyebrow{font-size:13px;letter-spacing:.09em;color:var(--blue2);font-weight:700}.channel-nav{display:flex;gap:13px;flex-wrap:wrap;margin-bottom:38px;font-size:14px;align-items:center}.channel-nav span{color:var(--muted)}.channel-nav a{text-decoration:none;background:var(--sub);padding:4px 10px;border-radius:5px}.reading-section{margin:36px 0 46px}.reading-section>h2{border-left:3px solid var(--blue);padding-left:13px}.reading-section>p,.reading-section>.reading-list{max-width:820px}.article-narrow{max-width:820px}.article-narrow .reading-section{margin:34px 0}.tile-grid,.question-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tile,.question-grid article,.short-readings>div,.editor-split>article,.strips .strip,.catalog-item,.faq-item,.category-links>div{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:20px;min-width:0}.tile a,.question-grid a,.short-readings a,.editor-split a{font-size:14px}.strips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.strip h3{font-size:17px}.table-scroll{width:100%;overflow-x:auto;border-radius:8px;border:1px solid var(--border)}table{width:100%;border-collapse:collapse;min-width:570px;background:var(--surface);font-size:15px;text-align:left}td,th{padding:13px 15px;border-bottom:1px solid var(--border);vertical-align:top}th{background:var(--sub2);color:var(--title)}tr:last-child td{border-bottom:0}.reading-list li{margin:10px 0}.media-natural{display:grid;place-items:center;min-width:0;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:8px;margin:20px 0;gap:10px}.image-slot{display:grid;place-items:center;min-width:0;max-width:100%}.media-natural img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--image-max-height,280px);object-fit:contain;object-position:center}.media-natural figcaption{font-size:13px;color:var(--muted);text-align:center}.image-fallback{background:var(--sub2);border:1px dashed var(--border-strong);color:var(--muted);border-radius:8px;padding:32px;text-align:center;max-width:100%}.related{border-top:1px solid var(--border);margin-top:52px;padding-top:24px}.related h2{font-size:20px}.related-links,.link-row,.service-links{display:flex;flex-wrap:wrap;gap:14px 25px}.related-links a,.link-row a,.service-links a{text-decoration:none}.hero-editor{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:35px;align-items:end;padding:32px 0 18px}.hero-editor h1{max-width:760px}.hero-intro{max-width:780px}.reading-signals{display:grid;gap:10px}.reading-signals span{padding:11px 14px;border-left:2px solid var(--blue);background:var(--surface);color:var(--title);font-size:14px}.editor-split{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:18px}.short-readings{display:grid;gap:12px}.short-readings>div{padding:14px 18px}.visual-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.visual-three>article{min-width:0}.visual-three p{font-size:14px}.rule-band{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin:40px 0;padding:26px;border:1px solid var(--border-strong);background:var(--sub)}.rule-band>div{flex:1 1 400px}.rule-band h2{font-size:21px}.rule-band p{margin:0}.rule-band>a{white-space:nowrap}.catalog-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.catalog-item{padding:8px}.catalog-item .media-natural{margin:0}.catalog-item h3{font-size:16px;margin:8px}.catalog-item p{font-size:13px;margin:0 8px 8px}.term-list>div{border-bottom:1px solid var(--border);padding:16px 0}.term-list dt{font-weight:700;color:var(--title)}.term-list dd{margin:4px 0 0}.term-list .muted{font-size:14px;color:var(--muted);margin:3px 0}.toc{display:flex;gap:18px;flex-wrap:wrap}.bookmark-list{list-style:none;counter-reset:b;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding:0}.bookmark-list li{counter-increment:b;background:var(--surface);border:1px solid var(--border);border-radius:9px;padding:20px}.bookmark-list li h3::before{content:counter(b,decimal-leading-zero) '  ';color:var(--blue2)}.category-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.category-links>div{padding:14px}.category-links p{font-size:13px;color:var(--muted);margin:5px 0 0}.faq-items{max-width:860px}.faq-item{margin-bottom:12px}.faq-item h2{font-size:18px;margin-bottom:7px;border:0;padding:0}.faq-item p{margin:0}.site-footer{background:#050608;border-top:1px solid var(--border);padding:30px max(24px,calc((100vw - 1152px)/2)) 20px}.footer-grid{display:flex;justify-content:space-between;gap:25px}.footer-grid nav{display:flex;gap:15px;flex-wrap:wrap}.footer-grid nav a{font-size:14px}.footer-brand{color:var(--title);text-decoration:none;font-size:20px;font-weight:700}.footer-brand span{display:block;color:var(--muted);font-size:12px;font-weight:400}.disclaimer{font-size:12px;color:var(--muted);margin:12px 0 0}.back-top{position:fixed;right:20px;bottom:20px;z-index:40;background:var(--sub2);color:var(--title);border:1px solid var(--border-strong);padding:8px 12px;border-radius:9px}@media(max-width:1020px){.desktop-nav{display:none}.header-inner{justify-content:space-between}.logo{margin-right:auto}.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:700px){body{font-size:15px;line-height:1.75}.header-inner{height:64px;padding:0 16px;gap:9px}.logo{max-width:96px;min-width:80px}.logo img{max-width:96px;height:32px}.menu-toggle{min-height:44px;padding:7px 10px}.entry-button{padding:8px 9px;font-size:13px}.content-shell{padding:0 16px}.main-content{padding-bottom:42px}.page-intro h1{font-size:26px}.page-intro>p:last-child{font-size:16px}.reading-section{margin:26px 0 32px}.reading-section h2{font-size:21px}.tile-grid,.question-grid,.strips,.editor-split,.bookmark-list,.category-links{grid-template-columns:minmax(0,1fr)}.hero-editor{grid-template-columns:1fr;gap:15px;padding-top:16px}.hero-editor h1{font-size:28px}.reading-signals{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.reading-signals span{font-size:12px;padding:8px;word-break:break-word}.visual-three{grid-template-columns:1fr}.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-item{padding:6px}.catalog-item p{font-size:12px}.menu-panel{top:auto;bottom:0;left:0;transform:none;width:100%;max-height:85vh;max-height:85dvh;overscroll-behavior:contain;border-radius:14px 14px 0 0;padding:18px 16px calc(18px + env(safe-area-inset-bottom))}.menu-groups{grid-template-columns:1fr}.menu-groups section{padding:12px}.site-footer{padding:28px 16px}.footer-grid{flex-direction:column}.channel-nav{margin-bottom:25px}.media-natural img{max-height:min(var(--image-max-height,280px),260px)}.menu-head{position:sticky;top:-18px;background:var(--sub);padding:10px 0;z-index:1}}@media(max-width:350px){.header-inner{gap:5px}.logo{min-width:70px}.menu-toggle{padding:6px 8px}.entry-button{font-size:12px;padding:8px}.catalog-grid{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}