:root{--bg:#F6FBFF;--white:#fff;--soft:#EFF8FF;--accent:#2AA9E0;--bright:#53C2F2;--navy:#244C78;--title:#1C3552;--body:#31485F;--muted:#6B8299;--border:rgba(42,169,224,.16);--purple:#6B4FAF;--gold:#D9B15B;--footer:#16324F}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--body);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);overflow-wrap:anywhere}a{color:var(--navy);text-decoration:none}a:hover{color:var(--accent)}a:focus-visible,button:focus-visible{outline:3px solid var(--purple);outline-offset:3px}button{font:inherit;cursor:pointer}img{max-width:100%}.wrap{width:min(1160px,calc(100% - 48px));margin-inline:auto}.skip-link{position:absolute;left:-9999px;background:#fff;padding:8px 16px;z-index:14000}.skip-link:focus{left:10px;top:10px}h1,h2,h3{line-height:1.34;color:var(--title);margin:0 0 16px}h1{font-size:34px;letter-spacing:-.03em}h2{font-size:25px}h3{font-size:19px}p{margin:0 0 16px}strong{color:#244C78}small,.muted{color:var(--muted)}
.site-header{position:sticky;top:0;z-index:1000;background:var(--white);box-shadow:0 4px 20px rgba(35,87,132,.08)}.topbar{display:flex;align-items:center;gap:24px;height:70px}.brand{display:inline-flex;align-items:center;flex-shrink:0;min-width:148px}.brand-logo{display:block;width:auto;max-width:154px;height:38px;object-fit:contain}.brand-wordmark{display:inline-flex;align-items:center;gap:4px;white-space:nowrap;font-size:24px;font-weight:900;color:var(--navy);letter-spacing:-.05em}.brand-wordmark>span:last-child{color:var(--purple)}.brand-emblem{display:grid;place-items:center;width:35px;height:35px;margin-right:6px;border-radius:11px;background:linear-gradient(145deg,var(--accent),var(--purple));font-weight:900;font-size:22px;color:#fff;letter-spacing:0;box-shadow:0 3px 0 var(--gold)}.desktop-nav{display:flex;align-items:stretch;gap:5px;flex:1;justify-content:center;height:100%}.nav-link{display:inline-flex;align-items:center;justify-content:center;padding:0 11px;font-size:14px;font-weight:650;white-space:nowrap;position:relative}.nav-link.is-current{color:var(--accent)}.nav-link.is-current:after{content:"";position:absolute;bottom:0;left:12px;right:12px;height:2px;background:var(--accent)}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:82px;height:40px;padding:0 18px;border-radius:999px;background:linear-gradient(135deg,#53C2F2 0%,#2AA9E0 55%,#6B4FAF 100%);color:#fff;font-weight:700;white-space:nowrap}.main-btn:hover{color:#fff;filter:brightness(.95)}.channel-strip{background:var(--soft);border-top:1px solid #edf7ff}.channel-nav{display:flex;align-items:center;gap:32px;height:44px;overflow-x:auto;scrollbar-width:thin}.channel-link{font-size:14px;color:#58718E;flex-shrink:0;white-space:nowrap}.channel-link.is-current{color:var(--accent);font-weight:bold}.menu-toggle{display:none}.drawer-mask,.mobile-drawer,.mobile-bottom-nav{display:none}
.site-main{padding-top:32px;padding-bottom:62px;min-height:60vh}.hero{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:32px;padding:35px;border:1px solid var(--border);border-radius:20px;background:linear-gradient(125deg,#fff,#effaff 70%,#f6f2ff);box-shadow:0 10px 35px rgba(28,85,122,.05)}.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--purple);letter-spacing:.11em;margin-bottom:12px}.hero h1{font-size:36px;max-width:640px}.hero p{max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.outline-btn{display:inline-flex;align-items:center;padding:9px 18px;border-radius:99px;border:1px solid var(--border);background:#fff;font-weight:700}.section{margin-top:43px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:17px}.section-heading h2{margin-bottom:0}.section-heading>a{font-size:14px;font-weight:700}.intro{color:#526b83;max-width:790px}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card,.article-panel,.feature-panel,.info-panel{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:0 5px 20px rgba(35,90,130,.035)}.card h3{margin-bottom:9px}.card p{font-size:15px;color:#60788f}.card>a,.card .more{font-size:14px;font-weight:700}.card-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--soft);color:var(--accent);font-weight:800;margin-bottom:14px}.feature-layout{display:grid;grid-template-columns:1.06fr .94fr;gap:24px;align-items:center}.feature-panel h3{font-size:22px}.text-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.text-links a{background:var(--soft);padding:8px 13px;border-radius:9px;font-size:14px;font-weight:700}.stack-list{display:grid;gap:13px}.stack-list>a{display:block;padding:17px 19px;border:1px solid var(--border);background:#fff;border-radius:12px;font-weight:700}.stack-list>a span{display:block;font-size:13px;font-weight:400;color:var(--muted)}.media{display:flex;align-items:center;justify-content:center;overflow:hidden;width:100%;border-radius:12px;background:var(--soft);border:1px solid var(--border);position:relative}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-banner{aspect-ratio:16/7}.media-wide{aspect-ratio:16/9}.media-square{aspect-ratio:1/1}.media-device{aspect-ratio:9/16;max-height:400px;width:min(100%,240px);margin:auto}.media-placeholder{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(circle at 75% 25%,rgba(107,79,175,.1),transparent 36%),linear-gradient(150deg,#e5f7ff,#f2faff)}.placeholder-shape{width:36%;height:45%;border:2px solid rgba(42,169,224,.22);border-radius:22px;transform:rotate(-9deg);box-shadow:23px 13px 0 -7px rgba(42,169,224,.09)}.media-device .placeholder-shape{width:50%;height:60%}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.gallery-item{padding:14px;background:#fff;border:1px solid var(--border);border-radius:14px}.gallery-item h3{font-size:17px;margin:14px 3px 7px}.gallery-item p{font-size:14px;margin:0 3px 5px;color:var(--muted)}.number-list{list-style:none;margin:0;padding:0;counter-reset:list;display:grid;gap:12px}.number-list li{counter-increment:list;background:#fff;padding:14px 18px 14px 52px;border:1px solid var(--border);border-radius:11px;position:relative}.number-list li:before{content:counter(list,decimal-leading-zero);position:absolute;left:16px;top:17px;color:var(--accent);font-weight:800;font-size:14px}.number-list strong{display:block}.number-list p{font-size:14px;margin:2px 0 0;color:var(--muted)}.article-head{padding:30px 34px;border-radius:18px;background:linear-gradient(115deg,#f0fbff,#fff);border:1px solid var(--border);margin-bottom:24px}.article-head h1{margin-bottom:14px}.article-head p{margin:0;max-width:800px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:14px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 275px;align-items:start;gap:27px}.article-content{min-width:0}.article-section{background:#fff;padding:28px 32px;border:1px solid var(--border);border-radius:14px;margin-bottom:17px}.article-section p:last-child{margin-bottom:0}.article-section h2{font-size:23px}.article-section p{line-height:1.85}.article-side{position:sticky;top:140px;display:grid;gap:16px}.article-side .info-panel{padding:20px}.article-side h2{font-size:18px}.reading-card{display:flex;flex-wrap:wrap;align-items:center;gap:4px;position:relative;padding:13px 15px;border-bottom:1px solid var(--border)}.reading-card:last-child{border:0}.reading-title{font-weight:bold;display:block;flex:1}.reading-desc{display:block;flex-basis:100%;font-size:13px;color:var(--muted)}.reading-arrow{color:var(--accent)}.note{background:var(--soft);border-left:3px solid var(--accent);border-radius:8px;padding:16px 20px;font-size:14px}.faq-list{display:grid;gap:13px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;padding:19px 23px}.faq-item h2{font-size:18px;margin-bottom:7px}.faq-item p{font-size:15px;margin:0}.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.category-block{border:1px solid var(--border);border-radius:14px;padding:22px;background:#fff}.category-block h2{font-size:21px}.category-block a{display:inline-block;margin:4px 12px 4px 0;font-weight:700}.legal-note{margin-top:32px;border:1px solid var(--border);border-radius:13px;background:#f2faff;padding:20px 24px}.legal-note h2{font-size:18px}.legal-note p{font-size:14px;margin:0}
.site-footer{background:var(--footer);color:#E8F5FF;padding:40px 0 19px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:42px}.footer-grid h2{font-size:17px;color:#fff}.footer-grid a:not(.brand){display:block;color:#E8F5FF;font-size:14px;margin:6px 0}.footer-grid a:hover{color:#75d6ff}.footer-grid p{font-size:14px;color:#cee4f5}.footer-brand{margin-bottom:13px}.footer-brand .brand-wordmark{color:#fff}.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:22px;margin-top:28px;padding-top:19px;border-top:1px solid rgba(255,255,255,.16);font-size:13px}.footer-bottom p{margin:0;color:#c3dcec}.back-to-top{position:fixed;bottom:24px;right:24px;border:1px solid var(--border);border-radius:50%;width:42px;height:42px;background:#fff;color:var(--navy);box-shadow:0 5px 15px rgba(0,0,0,.1);opacity:0;visibility:hidden;transition:.2s}.back-to-top.is-visible{opacity:1;visibility:visible}
@media(max-width:1100px){.topbar{gap:12px}.desktop-nav{gap:0}.nav-link{padding:0 7px;font-size:13px}}
@media(max-width:980px){.wrap{width:calc(100% - 40px)}.desktop-nav{display:none}.topbar{height:58px;justify-content:space-between;gap:9px}.brand{min-width:0}.brand-logo{height:29px;max-width:125px}.brand-wordmark{font-size:20px}.brand-emblem{width:28px;height:28px;font-size:18px;margin-right:3px}.main-btn{height:36px;min-width:66px;padding:0 13px;font-size:14px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:38px;height:38px;border:0;background:none;color:var(--navy);flex-shrink:0}.menu-toggle span{display:block;background:currentColor;border-radius:2px;width:21px;height:2px}.channel-nav{gap:25px}.drawer-mask{display:block;position:fixed;inset:0;background:rgba(28,73,114,.36);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100vh;height:100dvh;overflow-y:auto;background:#fff;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;background:var(--navy);padding:18px 18px}.drawer-top .brand-wordmark{color:#fff}.drawer-close{background:none;border:0;color:#fff;font-size:30px;line-height:1;width:35px;height:35px}.drawer-group{padding:16px 21px;border-bottom:1px solid var(--border)}.drawer-group h2{font-size:13px;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}.drawer-link{display:block;padding:6px 0;font-size:15px}.drawer-link.is-current{color:var(--accent);font-weight:bold}body.drawer-open{overflow:hidden}.mobile-bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:900;height:60px;background:#fff;border-top:1px solid var(--border);box-shadow:0 -4px 18px rgba(35,90,130,.08)}.mobile-bottom-nav a{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;font-size:12px;gap:1px;color:var(--navy)}.mobile-bottom-nav a span{font-size:20px;line-height:1.1}.mobile-bottom-nav .is-current{color:var(--accent);font-weight:700}.site-footer{padding-bottom:80px}.back-to-top{bottom:75px;right:15px}.article-layout{grid-template-columns:1fr}.article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}.hero{gap:20px}}
@media(max-width:768px){.hero{grid-template-columns:1fr;padding:26px}.hero h1{font-size:28px}.hero .media{max-height:260px}.feature-layout{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.article-head{padding:24px}.article-head h1{font-size:27px}.gallery-grid{gap:12px}}
@media(max-width:520px){.wrap{width:calc(100% - 32px)}body{font-size:15px}.site-main{padding-top:20px;padding-bottom:34px}.hero{padding:18px}.hero h1{font-size:26px}.eyebrow{font-size:12px}.section{margin-top:27px}.section-heading h2{font-size:21px}.card-grid,.card-grid.two,.gallery-grid,.category-grid{grid-template-columns:1fr}.card{padding:19px}.card h3{font-size:17px}.section-heading{align-items:center}.article-head{padding:20px}.article-head h1{font-size:25px}.article-section{padding:21px 19px}.article-section h2{font-size:20px}.article-side{grid-template-columns:1fr}.footer-grid{gap:22px}.footer-grid h2{font-size:16px}.footer-bottom{display:block}.footer-bottom p{margin-top:8px}.brand-wordmark{font-size:19px}.hero-actions{gap:8px}}
@media(max-width:355px){.brand-wordmark{font-size:17px}.brand-emblem{width:26px;height:26px}.menu-toggle{width:30px}.topbar{gap:5px}.register-btn{min-width:59px;padding:0 11px}.channel-nav{gap:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}