*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f6fbff;color:#31485f;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:#176c9f;text-decoration:none}a:hover{color:#6b4faf}button{font:inherit;cursor:pointer}img{max-width:100%}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid rgba(42,169,224,.16);z-index:1000;box-shadow:0 2px 18px rgba(18,70,109,.04)}.header-row{min-height:70px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:8px;flex-shrink:0;color:#244c78;font-weight:800;font-size:22px}.brand-logo{max-height:38px;max-width:160px;width:auto;object-fit:contain}.brand-symbol{display:grid;place-items:center;width:35px;height:35px;border-radius:10px;background:linear-gradient(145deg,#2aa9e0,#6b4faf);color:white;font-size:16px}.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:15px;margin-left:auto;height:70px}.desktop-nav a{font-size:14px;display:flex;align-items:center;color:#244c78;border-bottom:2px solid transparent;white-space:nowrap}.desktop-nav a:hover,.desktop-nav a.active{color:#2aa9e0;border-bottom-color:#2aa9e0}.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,#2aa9e0 55%,#6b4faf);color:white;font-size:14px;font-weight:700;white-space:nowrap}.main-btn:hover{color:white;filter:brightness(.96)}.channel-nav{background:#eff8ff;border-bottom:1px solid #ddecf8}.channel-scroll{display:flex;gap:30px;align-items:center;min-height:44px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}.channel-scroll::-webkit-scrollbar{display:none}.channel-scroll a{font-size:14px;color:#58718e}.channel-scroll a.active,.channel-scroll a:hover{color:#2aa9e0}.site-main{min-height:58vh}.hero,.section{margin-top:38px}.hero-text{background:linear-gradient(125deg,#e8f8ff,#fff 54%,#f3f0fc);padding:32px;border:1px solid #dceefa;border-radius:14px}.eyebrow{font-size:13px;letter-spacing:.08em;color:#6b4faf;font-weight:700}.hero h1{font-size:36px;line-height:1.35;color:#1c3552;margin:6px 0 12px}.hero p{max-width:800px;margin:0 0 16px}.hero-links{display:flex;flex-wrap:wrap;gap:10px}.soft-btn{display:inline-flex;align-items:center;border-radius:999px;padding:7px 17px;background:#fff;color:#244c78;border:1px solid #cce9f8;font-size:14px}.section h2,.article-body h2{font-size:24px;line-height:1.4;color:#1c3552;margin:0 0 17px}.section-lead{max-width:810px;color:#58718e}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.topic-card,.panel,.article-card{background:#fff;border:1px solid rgba(42,169,224,.16);border-radius:13px;padding:22px;min-width:0;box-shadow:0 8px 28px rgba(21,75,111,.035)}.topic-card{display:block;color:inherit;transition:transform .2s,box-shadow .2s}.topic-card:hover{transform:translateY(-3px);box-shadow:0 8px 26px rgba(42,169,224,.13)}.topic-card h3{font-size:19px;color:#244c78;margin:5px 0 7px}.topic-card p{font-size:14px;color:#60778b;margin:0 0 12px}.card-icon{color:#2aa9e0;font-size:24px}.card-more{font-size:13px;color:#2aa9e0}.columns-2{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;align-items:start}.columns-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.link-list{margin:0;padding:0;list-style:none}.link-list li{padding:10px 0;border-bottom:1px solid #e7f2f8}.link-list a{font-weight:600}.media{width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:12px;background:#eff8ff;border:1px solid #dceefa}.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-width:300px;margin:auto}.media-placeholder{height:100%;width:100%;display:grid;place-items:center;background:linear-gradient(140deg,#e5f5ff,#f5faff 55%,#ece7fa)}.placeholder-ring{border:2px solid rgba(42,169,224,.2);width:54px;height:54px;border-radius:14px;transform:rotate(17deg)}.article-wrap{display:grid;grid-template-columns:minmax(0,800px) 1fr;gap:34px;align-items:start}.article{background:white;border:1px solid #e0eef8;border-radius:14px;padding:34px;min-width:0}.breadcrumbs{font-size:13px;color:#69829b;margin-bottom:18px}.article h1{font-size:32px;color:#1c3552;line-height:1.4;margin:0 0 15px}.article-intro{font-size:17px;color:#476783;border-left:3px solid #2aa9e0;padding-left:16px}.article-body h2{margin-top:33px;margin-bottom:12px}.article-body p{margin:0 0 18px;line-height:1.83}.article-body ul{padding-left:20px}.aside{position:sticky;top:134px}.aside h2{font-size:18px;color:#1c3552}.aside a{display:block;border-bottom:1px solid #e6f1fa;padding:9px 0}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.related-link{background:#fff;border:1px solid #dcecf6;border-radius:10px;padding:13px 16px;display:flex;justify-content:space-between;font-weight:600}.faq-item{padding:15px 0;border-bottom:1px solid #e2eef7}.faq-item h2{font-size:19px;margin:0 0 7px}.faq-item p{margin:0}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.gallery-card{background:#fff;border-radius:12px;border:1px solid #e2eef7;padding:14px}.gallery-card h3{color:#1c3552;margin:12px 0 4px}.gallery-card p{font-size:14px;margin:0}.note{background:#eff8ff;border-left:3px solid #6b4faf;padding:16px;border-radius:8px}.site-footer{background:#16324f;color:#e8f5ff;margin-top:60px;padding:50px 0 22px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}.footer-grid h2{font-size:17px;color:#fff;margin:0 0 12px}.footer-grid a{display:block;color:#d2eafc;font-size:14px;padding:3px 0}.footer-brand{font-size:24px!important;font-weight:700;color:#fff!important}.footer-logo{max-height:38px;max-width:160px;object-fit:contain}.footer-grid p{font-size:14px;max-width:300px}.footer-bottom{display:flex;gap:18px;align-items:center;justify-content:space-between;border-top:1px solid #385771;margin-top:28px;padding-top:16px;font-size:12px}.footer-bottom p{margin:0}.footer-bottom a{color:#dceefa}.menu-toggle,.mobile-bottom,.mobile-drawer,.drawer-mask{display:none}.skip-link{position:absolute;left:-9999px;top:0;background:#fff;z-index:20000;padding:10px}.skip-link:focus{left:8px}.back-top{position:fixed;right:20px;bottom:24px;border:0;background:#2aa9e0;color:#fff;border-radius:50%;height:42px;width:42px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:900}.back-top.show{opacity:1;pointer-events:auto}@media(max-width:980px){.container{width:calc(100% - 40px)}.header-row{min-height:58px;justify-content:space-between;gap:10px}.desktop-nav{display:none}.brand{margin:auto;font-size:19px}.brand-logo{max-height:30px;max-width:115px}.register-btn{height:36px;min-width:70px;padding:0 12px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;align-items:center;background:transparent;border:0;min-width:39px;height:39px;padding:6px}.menu-toggle span{height:2px;width:21px;background:#244c78;border-radius:2px}.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-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}body.drawer-open{overflow:hidden}.drawer-head{background:#16324f;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:16px}.drawer-brand{color:#fff;font-size:20px;font-weight:700}.drawer-brand span{font-size:12px;color:#accce5}.drawer-close{border:0;background:transparent;color:white;font-size:29px}.drawer-group{padding:12px 20px;border-bottom:1px solid #e7f1f9}.drawer-group h2{font-size:13px;letter-spacing:.06em;color:#6b4faf;margin:5px 0}.drawer-group a{display:block;padding:6px 4px;color:#244c78;font-size:15px}.drawer-group a.active{color:#2aa9e0;font-weight:700}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);height:60px;position:fixed;bottom:0;left:0;right:0;z-index:1050;background:#fff;border-top:1px solid #dcebf5}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:14px;color:#58718e}.mobile-bottom a.active{color:#2aa9e0;font-weight:700}.site-footer{margin-bottom:60px}.back-top{bottom:78px}.article-wrap{grid-template-columns:1fr}.aside{position:static}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){body{font-size:15px}.container{width:calc(100% - 32px)}.channel-scroll{gap:22px}.hero,.section{margin-top:27px}.hero-text{padding:23px 18px}.hero h1{font-size:27px}.section h2,.article-body h2{font-size:21px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.topic-card{padding:14px}.topic-card h3{font-size:16px}.topic-card p{font-size:13px}.columns-2,.columns-3,.related-grid{grid-template-columns:1fr}.gallery-grid{grid-template-columns:1fr}.article{padding:22px 17px}.article h1{font-size:25px}.article-intro{font-size:16px}.footer-grid{gap:18px}.footer-bottom{display:block}.media-banner{aspect-ratio:16/8}.media-device{max-width:220px}}@media(max-width:350px){.brand{font-size:17px}.brand-symbol{height:28px;width:28px}.register-btn{min-width:60px;padding:0 9px}.topic-grid{grid-template-columns:1fr}.header-row{gap:5px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}