:root{--bg:#F6FBFF;--panel:#fff;--soft:#EFF8FF;--brand:#2AA9E0;--bright:#53C2F2;--deep:#244C78;--title:#1C3552;--body:#31485F;--muted:#6B8299;--line:rgba(42,169,224,.16);--purple:#6B4FAF;--gold:#D9B15B}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--body);background:var(--bg);font-size:16px;line-height:1.8}button{font:inherit}a{color:var(--deep);text-decoration:none}a:hover{color:var(--brand)}a:focus-visible,button:focus-visible{outline:3px solid var(--purple);outline-offset:3px}img{max-width:100%}.container{width:min(100% - 48px,1160px);margin-inline:auto}.skip-link{position:absolute;left:8px;top:-80px;z-index:20000;background:#fff;padding:8px}.skip-link:focus{top:8px}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 20px rgba(24,75,112,.06)}.topbar{height:70px;display:flex;align-items:center;gap:20px}.brand{flex-shrink:0;display:flex;align-items:center;justify-content:center;min-width:125px}.brand img{height:37px;width:auto;object-fit:contain}.brand-fallback{font-size:25px;font-weight:900;color:var(--deep);letter-spacing:.4px}.brand-fallback span{color:var(--brand)}.desktop-nav{display:flex;align-self:stretch;align-items:center;justify-content:center;gap:clamp(9px,1.4vw,24px);flex:1}.nav-link{display:flex;align-items:center;height:100%;border-bottom:2px solid transparent;white-space:nowrap;color:#244C78;font-size:14px;font-weight:600}.nav-link.is-active,.nav-link:hover{color:var(--brand);border-bottom-color:var(--brand)}.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;text-decoration:none;white-space:nowrap}.main-btn:hover{color:#fff;filter:brightness(.96)}.channelbar{background:#EFF8FF;border-top:1px solid var(--line)}.channel-scroll{height:44px;display:flex;align-items:center;gap:32px;overflow-x:auto;scrollbar-width:none}.channel-scroll::-webkit-scrollbar{display:none}.channel-link{flex:0 0 auto;white-space:nowrap;font-size:14px;color:#58718E}.channel-link.is-active{color:var(--brand);font-weight:700}.site-main{min-height:65vh}.page-hero{padding:46px 0 27px;background:linear-gradient(140deg,#eaf8ff,#fff 64%,#f5f2ff);border-bottom:1px solid var(--line)}.eyebrow{display:block;margin-bottom:6px;color:var(--purple);font-size:13px;font-weight:700;letter-spacing:.13em}.page-hero h1,.home-heading h1{margin:0 0 14px;color:var(--title);font-size:34px;line-height:1.35;letter-spacing:-.03em}.page-hero p{max-width:780px;margin:0;color:#526e87;line-height:1.9}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:16px}.breadcrumbs a{color:var(--deep)}.page-wrap{padding:34px 0 60px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:30px;align-items:start}.article-panel,.sidebar-card,.surface,.topic-card,.visual-card,.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 7px 26px rgba(30,80,130,.035)}.article-panel{padding:30px 34px}.article-panel h2{margin:35px 0 12px;color:var(--title);font-size:24px;line-height:1.45}.article-panel h2:first-child{margin-top:0}.article-panel p{margin:0 0 17px;line-height:1.83}.article-intro{font-size:17px;color:#3c5a78;border-left:3px solid var(--brand);padding:8px 0 8px 16px;margin-bottom:25px!important;background:linear-gradient(90deg,#f2fbff,transparent)}.related-block{border-top:1px solid var(--line);margin-top:28px;padding-top:15px}.related-links{display:flex;flex-wrap:wrap;gap:9px}.related-links a{background:var(--soft);border-radius:30px;padding:7px 14px;font-size:14px}.sidebar-card{padding:22px;position:sticky;top:137px}.sidebar-card h2{font-size:18px;color:var(--title);margin:0 0 12px}.sidebar-card a{display:block;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}.sidebar-card a:last-child{border:0}.section{margin:0 0 36px}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin:0 0 17px}.section-heading h2{color:var(--title);font-size:25px;line-height:1.35;margin:0}.section-heading>a{font-size:14px;color:var(--brand);white-space:nowrap}.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))}.topic-card{padding:23px;display:block;min-width:0;transition:transform .2s,box-shadow .2s}.topic-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(26,93,136,.1)}.topic-card .symbol{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;width:45px;height:45px;background:var(--soft);color:var(--purple);font-weight:800;font-size:18px;margin-bottom:12px}.topic-card h3{font-size:18px;color:var(--title);margin:0 0 7px}.topic-card p{margin:0;color:#627c94;font-size:14px;line-height:1.75}.panel-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:center}.surface{padding:25px}.surface h3{margin:0 0 8px;font-size:21px;color:var(--title)}.surface p{margin:0 0 14px}.feature-list{margin:0;padding-left:21px}.feature-list li{margin:10px 0}.media{display:flex;align-items:center;justify-content:center;width:100%;overflow:hidden;border-radius:12px;background:var(--soft);border:1px solid var(--line)}.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:330px;margin-inline:auto}.media-logo{aspect-ratio:4/1}.media-placeholder{width:100%;height:100%;background:linear-gradient(135deg,#e3f5ff,#f7fbff 45%,#e7eaff)}.hero-visual{margin-bottom:24px}.home-heading{padding:4px 0 25px}.home-heading p{max-width:900px;margin:0;color:#627d94}.home-content{padding:28px 0 54px}.mini-list{margin:0;padding:0;list-style:none}.mini-list li{padding:11px 0;border-bottom:1px solid var(--line)}.mini-list li:last-child{border:0}.mini-list strong{color:var(--purple);margin-right:7px}.notice{padding:21px 25px;background:#eef8ff;border-left:3px solid var(--brand);border-radius:10px;color:#365f7d}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.visual-card{padding:14px}.visual-card h2,.visual-card h3{font-size:18px;color:var(--title);margin:13px 3px 5px}.visual-card p{margin:0 3px 10px;color:var(--muted);font-size:14px}.faq-item{margin-bottom:15px;padding:20px 24px}.faq-item h2{margin:0 0 9px;font-size:18px;color:var(--title)}.faq-item p{margin:0}.site-footer{background:#16324F;color:#E8F5FF;padding:43px 0 16px}.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:35px}.footer-grid h2{margin:0 0 12px;color:#fff;font-size:16px}.footer-grid p{font-size:14px;color:#d5eaf5;max-width:300px}.footer-brand{font-size:24px;font-weight:800;color:#fff}.footer-brand img{object-fit:contain;max-height:38px}.footer-grid a{display:block;font-size:14px;color:#dcebf5;margin:6px 0}.footer-grid a:hover{color:#fff;text-decoration:underline}.footer-bottom{margin-top:28px;border-top:1px solid rgba(255,255,255,.15);padding-top:14px;display:flex;gap:18px;justify-content:space-between;font-size:12px;color:#d0e3f0}.menu-toggle,.mobile-drawer,.drawer-mask,.mobile-bottom{display:none}.back-to-top{position:fixed;right:18px;bottom:20px;border:0;border-radius:50%;background:#2AA9E0;color:#fff;width:44px;height:44px;cursor:pointer;box-shadow:0 5px 20px #244c7833;opacity:0;visibility:hidden;transition:.2s;z-index:900}.back-to-top.is-visible{opacity:1;visibility:visible}
@media(max-width:980px){.container{width:calc(100% - 40px)}.topbar{height:58px;justify-content:space-between;gap:8px}.desktop-nav{display:none}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;background:transparent;border:0;width:40px;height:40px;padding:9px;cursor:pointer;flex-shrink:0}.menu-toggle span{display:block;background:#244C78;width:23px;height:2px;border-radius:2px}.brand{min-width:0;margin-inline:auto}.brand img{height:29px;max-width:125px}.brand-fallback{font-size:22px}.register-btn{height:36px;min-width:72px;padding:0 12px;font-size:14px}.channel-scroll{gap:25px}.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{display:flex;justify-content:space-between;align-items:center;background:#16324F;padding:17px 18px}.drawer-brand{font-size:19px;font-weight:800;color:#fff}.drawer-brand small{display:block;font-size:10px;letter-spacing:.1em;color:#d2e7fc}.drawer-close{background:transparent;color:#fff;border:0;font-size:32px;cursor:pointer;line-height:1}.drawer-group{padding:14px 18px;border-bottom:1px solid var(--line)}.drawer-group strong{display:block;color:#244C78;font-size:14px;margin-bottom:6px}.drawer-group a{display:inline-block;font-size:14px;padding:7px 12px 7px 0;color:#486b89}.drawer-group a.is-active{color:var(--brand);font-weight:800}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:950;display:grid;grid-template-columns:repeat(4,1fr);height:60px;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px);box-shadow:0 -3px 14px rgba(0,0,0,.03)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px;color:#57728b}.mobile-bottom a.is-active{color:var(--brand);font-weight:800}.site-footer{padding-bottom:85px}.back-to-top{bottom:80px}.article-layout{grid-template-columns:1fr}.sidebar-card{position:static}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.page-hero{padding:32px 0 24px}}
@media(max-width:600px){body{font-size:15px}.container{width:calc(100% - 32px)}.page-hero h1,.home-heading h1{font-size:26px}.page-hero p{font-size:15px}.page-wrap{padding-top:23px}.article-panel{padding:20px 18px}.article-panel h2{font-size:20px;margin-top:28px}.article-intro{font-size:15px}.section-heading h2{font-size:21px}.card-grid,.card-grid.two,.gallery-grid,.panel-grid{grid-template-columns:1fr}.topic-card{padding:19px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:23px 15px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:4px}.media-banner{aspect-ratio:16/8}.section{margin-bottom:28px}.surface{padding:20px}}
@media(min-width:601px) and (max-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:360px){.brand-fallback{font-size:19px}.register-btn{min-width:65px}.topbar{gap:3px}.menu-toggle{width:35px;padding:7px}.channel-scroll{gap:17px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}