*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F7F9FF;color:#27324A;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72;overflow-x:hidden}body.locked{overflow:hidden}a{color:#1D4ED8;text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.shell{width:min(1180px,calc(100% - 32px));margin:0 auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:#18203A;color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid rgba(99,102,241,.12)}.brand-bar{height:68px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px}.brand{display:flex;align-items:center;min-width:150px}.brand-logo,.footer-logo,.drawer-brand img{height:30px;width:auto;max-width:180px;object-fit:contain}.brand-fallback{display:flex;align-items:baseline;gap:8px;color:#18203A}.brand-fallback strong{font-size:20px}.brand-fallback small{color:#55627A;letter-spacing:.08em}.brand-slogan{justify-self:center;color:#55627A;font-size:14px}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.app-entry{min-width:44px;height:44px;border:1px solid rgba(99,102,241,.18);background:#fff;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:#18203A;font:inherit;cursor:pointer}.app-entry{padding:0 14px;color:#1D4ED8;font-weight:700}.icon-button:hover,.icon-button:focus-visible,.app-entry:hover,.app-entry:focus-visible{border-color:#2563EB;box-shadow:0 0 0 3px rgba(37,99,235,.12);text-decoration:none}.desktop-nav{height:48px;background:#fff}.nav-row{height:48px;display:flex;align-items:center;gap:28px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}.nav-row::-webkit-scrollbar{display:none}.nav-row a{height:48px;display:inline-flex;align-items:center;color:#39445D;font-weight:600;border-bottom:3px solid transparent}.nav-row a.active{color:#18203A;border-color:#7C3AED}.page-main{min-height:60vh}.hero,.section,.article-page{padding:56px 0}.hero-card,.content-card,.feature-card,.article-card,.info-card{background:#fff;border:1px solid rgba(99,102,241,.16);box-shadow:0 14px 36px rgba(37,46,86,.08);border-radius:16px}.hero-card{padding:24px}.media-slot{width:100%;background:#EEF2FF;border:1px solid rgba(99,102,241,.14);border-radius:16px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot.cover{aspect-ratio:16/9;max-height:300px}.media-slot.landscape{aspect-ratio:3/2;max-height:220px}.media-slot.phone{max-height:420px;min-height:260px}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.hero-copy{padding-top:24px;max-width:860px}.eyebrow{display:inline-block;color:#5B21B6;font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.hero h1,.article-page h1{font-size:clamp(28px,4vw,32px);line-height:1.25;margin:8px 0 14px;color:#18203A}.lead{font-size:16px;color:#55627A;max-width:78ch}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.btn{min-height:44px;padding:10px 18px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-weight:800}.btn.primary{background:linear-gradient(135deg,#60A5FA 0%,#2563EB 48%,#7C3AED 100%);color:#fff}.btn.secondary{background:#fff;color:#5B21B6;border:1px solid rgba(99,102,241,.22)}.btn:hover{text-decoration:none;transform:translateY(-1px)}.section h2{font-size:clamp(21px,3vw,24px);line-height:1.35;color:#18203A;margin:0 0 10px}.section-intro{max-width:78ch;color:#55627A;margin:0 0 24px}.grid-2,.grid-3,.grid-4{display:grid;gap:24px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.content-card,.feature-card,.article-card,.info-card{padding:22px}.content-card h3,.feature-card h3,.article-card h2,.info-card h3{margin:0 0 10px;color:#18203A;font-size:19px}.content-card p,.feature-card p,.info-card p{margin:0;color:#55627A}.card-link{display:inline-flex;margin-top:14px;font-weight:800}.split{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}.split.reverse{grid-template-columns:.95fr 1.05fr}.topic-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic-item{padding:18px;border:1px solid rgba(99,102,241,.16);background:#fff;border-radius:14px}.topic-item h3{margin:0 0 6px;color:#18203A;font-size:17px}.editor-list{margin:0;padding:0;list-style:none;border-top:1px solid rgba(99,102,241,.16)}.editor-list li{padding:16px 0;border-bottom:1px solid rgba(99,102,241,.16)}.editor-list strong{display:block;color:#18203A;margin-bottom:4px}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.timeline article{padding-top:16px;border-top:3px solid #A78BFA}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.steps article{background:#fff;border:1px solid rgba(99,102,241,.16);border-radius:14px;padding:18px}.steps article:before{counter-increment:step;content:counter(step,decimal-leading-zero);display:block;font-weight:900;color:#7C3AED;margin-bottom:8px}.article-page .article-wrap{width:min(900px,calc(100% - 32px));margin:0 auto}.article-page .article-head{margin-bottom:28px}.article-section{background:#fff;border:1px solid rgba(99,102,241,.16);border-radius:16px;padding:24px;margin:0 0 22px}.article-section h2{margin:0 0 12px;color:#18203A;font-size:22px}.article-section h3{color:#18203A;margin:18px 0 8px;font-size:18px}.article-section p{margin:0 0 14px}.article-section ul,.article-section ol{padding-left:1.25em}.article-section li{margin-bottom:8px}.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.related-links a{padding:8px 12px;border-radius:10px;background:#EEF2FF;color:#1D4ED8;font-weight:700}.back-home{margin-top:28px}.faq-list{display:grid;gap:16px}.faq-item{background:#fff;border:1px solid rgba(99,102,241,.16);border-radius:14px;padding:20px}.faq-item h2{font-size:18px;margin:0 0 8px;color:#18203A}.site-footer{background:#171B36;color:#E8ECFF;padding:48px 0 84px}.footer-brand{display:flex;gap:16px;align-items:flex-start;margin-bottom:28px}.footer-brand strong{font-size:20px}.footer-brand p{color:#C9D2F5;margin:4px 0 0;max-width:620px}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-groups h2{font-size:16px;margin:0 0 10px;color:#fff}.footer-groups a{display:block;color:#D9E0FF;padding:4px 0}.footer-note,.copyright{color:#B8C2E8;font-size:14px}.footer-note{margin-top:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}.overlay{position:fixed;inset:0;background:rgba(13,19,48,.48);z-index:100;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;top:0;right:0;bottom:0;width:min(400px,86vw);background:#fff;z-index:120;transform:translateX(102%);visibility:hidden;pointer-events:none;transition:.25s;box-shadow:-20px 0 50px rgba(18,25,60,.18)}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid rgba(99,102,241,.14)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-scroll{height:calc(100vh - 68px);overflow:auto;padding:18px}.drawer section+section{margin-top:20px}.drawer h2{font-size:14px;color:#5B21B6;margin:0 0 8px;text-transform:uppercase;letter-spacing:.06em}.drawer a{display:block;padding:12px 2px;border-bottom:1px solid rgba(99,102,241,.12);color:#18203A}.drawer a b{display:block}.drawer a span{display:block;font-size:13px;color:#74809A;margin-top:2px}.search-panel{position:fixed;inset:0;z-index:130;display:grid;place-items:center;padding:24px;visibility:hidden;pointer-events:none}.search-panel.is-open{visibility:visible;pointer-events:auto}.search-card{width:min(560px,100%);background:#fff;border-radius:16px;padding:24px;box-shadow:0 24px 70px rgba(18,25,60,.25)}.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.search-head h2{margin:4px 0 16px;color:#18203A}.search-card label{display:block;font-weight:700;margin-bottom:8px}.search-card input{width:100%;height:48px;border:1px solid rgba(99,102,241,.25);border-radius:12px;padding:0 14px;font:inherit;color:#18203A;background:#F7F9FF}.search-card input:focus{outline:3px solid rgba(37,99,235,.13);border-color:#2563EB}.quick-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.quick-links a{background:#EEF2FF;border-radius:10px;padding:8px 11px;font-weight:700}.search-note{color:#74809A;font-size:14px;margin:16px 0 0}.mobile-bottom{display:none}.numbered{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;counter-reset:item}.numbered article{position:relative;padding:20px 20px 20px 64px;background:#fff;border:1px solid rgba(99,102,241,.16);border-radius:14px}.numbered article:before{counter-increment:item;content:counter(item,decimal-leading-zero);position:absolute;left:18px;top:18px;color:#7C3AED;font-weight:900;font-size:20px}.notice{background:#EEF2FF;border-left:4px solid #7C3AED;border-radius:10px;padding:16px 18px;color:#39445D}.tag-row{display:flex;flex-wrap:wrap;gap:10px}.tag-row a{padding:8px 12px;border-radius:10px;background:#fff;border:1px solid rgba(99,102,241,.16);font-weight:700}
@media(max-width:900px){.brand-slogan{display:none}.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.split,.split.reverse{grid-template-columns:1fr}.topic-list,.timeline{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.footer-groups{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.site-header{position:sticky}.brand-bar{height:62px;grid-template-columns:1fr auto;gap:10px}.brand{min-width:0}.brand-logo{max-width:150px;height:28px}.app-entry{display:none}.desktop-nav{display:none}.hero,.section,.article-page{padding:34px 0}.hero-card{padding:16px}.grid-2,.grid-3,.grid-4,.topic-list,.timeline,.steps,.numbered{grid-template-columns:1fr}.content-card,.feature-card,.article-card,.info-card,.article-section{padding:18px}.footer-groups{grid-template-columns:repeat(2,1fr);gap:20px 14px}.footer-brand{flex-direction:column}.site-footer{padding-bottom:90px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:70;height:calc(54px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.98);border-top:1px solid rgba(99,102,241,.14);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#55627A;font-size:12px;gap:1px}.mobile-bottom a span{font-size:18px}.mobile-bottom a.active{color:#2563EB;font-weight:800}.mobile-bottom a.active:before{content:"";position:absolute;top:0;width:24px;height:3px;background:#2563EB;border-radius:0 0 3px 3px}.search-panel{align-items:start;padding-top:72px}.search-card{padding:18px}.media-slot.landscape{max-height:210px}}
@media(max-width:420px){.shell,.article-page .article-wrap{width:min(100% - 32px,1180px)}.footer-groups{grid-template-columns:1fr}.brand-fallback small{display:none}.hero h1,.article-page h1{font-size:28px}}