@charset "UTF-8";
:root{--bg:#F6FBFF;--surface:#FFFFFF;--soft:#EFF8FF;--primary:#2AA9E0;--bright:#53C2F2;--deep:#244C78;--heading:#1C3552;--text:#31485F;--muted:#6B8299;--edge:rgba(42,169,224,.16);--violet:#6B4FAF;--gold:#D9B15B;--footer:#16324F;--shadow:0 10px 30px rgba(21,79,129,.065)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:var(--deep);text-decoration:none}a:hover{color:var(--primary)}button{font:inherit;cursor:pointer}img{max-width:100%}.container{width:min(100% - 48px,1160px);margin-inline:auto}.skip-link{position:absolute;z-index:20000;top:-60px;left:10px;background:white;padding:8px}.skip-link:focus{top:8px}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 3px 18px rgba(33,84,126,.06)}.head-inner{height:70px;display:flex;align-items:center;gap:25px}.brand{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--deep);font-weight:900}.brand img{width:auto;max-width:150px;height:38px;object-fit:contain}.brand-mark{font-size:27px;letter-spacing:-1px;color:var(--violet);line-height:1}.brand-mark 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.more{font-size:14px;font-weight:700;color:#158EBD}.card-icon{display:inline-grid;place-items:center;width:41px;height:41px;background:var(--soft);border-radius:11px;color:var(--primary);font-size:19px}.feature{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.feature .feature-copy{padding:5px 6px}.feature h3{color:var(--heading);font-size:22px;margin:0 0 11px}.feature p{margin:0 0 16px}.feature a,.article-links a{font-weight:700;color:#138DBD}.mini-list{display:grid;gap:12px}.mini-list a{padding:13px 16px;background:white;border:1px solid var(--edge);border-radius:11px;display:flex;align-items:center;justify-content:space-between;font-weight:700}.mini-list a:after{content:'›';color:var(--primary);font-size:22px}.knowledge-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.knowledge-grid article{padding:22px;border-radius:12px;background:#fff;border:1px solid var(--edge)}.knowledge-grid h3{color:var(--heading);font-size:18px;margin:0 0 10px}.knowledge-grid p{margin:0}.image-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.image-card{background:white;border-radius:12px;border:1px solid var(--edge);padding:12px}.image-card h3{font-size:17px;color:var(--heading);margin:9px 5px 3px}.image-card p{font-size:14px;color:var(--muted);margin:0 5px 7px}.media{display:flex;align-items:center;justify-content:center;width:100%;overflow:hidden;border-radius:12px;background:var(--soft);margin:0}.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:350px}.media-placeholder{background:linear-gradient(135deg,#E5F5FF 0%,#F5FBFF 55%,#EDF4FF 100%);position:relative}.placeholder-shape{width:30%;aspect-ratio:1;border:1px solid rgba(42,169,224,.22);border-radius:28px;transform:rotate(26deg);box-shadow:25px 22px 0 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var(--edge);padding:13px 20px;border-radius:10px;font-weight:700}.page-intro{padding:27px 30px;background:linear-gradient(135deg,#E9F7FF,white 65%);border:1px solid var(--edge);border-radius:14px}.page-intro h1{font-size:31px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:9px}.breadcrumb a{color:#5581A5}.inner-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:28px;align-items:start}.article-body{min-width:0}.article-section{padding:24px 27px;background:white;border:1px solid var(--edge);border-radius:13px;margin-top:18px}.article-section h2{margin:0 0 13px;color:var(--heading);font-size:23px;line-height:1.45}.article-section p{margin:0 0 15px;line-height:1.82}.article-section p:last-child{margin-bottom:0}.sidebar{position:sticky;top:105px}.side-box{background:white;padding:20px;border-radius:12px;border:1px solid var(--edge)}.side-box h2{font-size:18px;margin:0 0 14px;color:var(--heading)}.side-box a{display:block;border-top:1px solid var(--edge);padding:9px 0;font-size:14px}.side-box a:first-of-type{border-top:0}.related-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.related-item{background:white;border:1px solid var(--edge);padding:18px;border-radius:12px}.related-item a{display:block;font-weight:800;color:var(--deep)}.related-item span{font-size:13px;color:var(--muted);display:block;margin-top:6px}.faq-list{display:grid;gap:14px}.faq-item{padding:20px 24px;border-radius:12px;background:#fff;border:1px solid var(--edge)}.faq-item h2{font-size:18px;color:var(--heading);margin:0 0 7px}.faq-item p{margin:0}.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.category-tile{background:white;border-radius:12px;border:1px solid var(--edge);padding:22px}.category-tile h2{font-size:20px;color:var(--heading);margin:0 0 8px}.category-tile p{font-size:15px;color:var(--muted)}.category-tile 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22px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:#C5DDEB}.menu-toggle,.mobile-bottom,.drawer-mask,.mobile-drawer{display:none}.back-top{position:fixed;bottom:25px;right:20px;width:40px;height:40px;border:1px solid #BCE3F4;background:white;color:var(--primary);border-radius:50%;z-index:100;opacity:0;visibility:hidden;transition:opacity .15s,visibility .15s}.back-top.is-visible{opacity:1;visibility:visible}
@media(max-width:1100px){.main-nav{gap:13px}.head-inner{gap:15px}.nav-link{font-size:13px}}
@media(max-width:980px){.main-nav{display:none}.head-inner{height:58px;justify-content:space-between;gap:10px}.brand img{height:29px;max-width:128px}.brand-mark{font-size:23px}.register-btn{min-width:70px;height:36px;padding:0 12px;font-size:14px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:35px;height:35px;padding:7px;background:transparent;border:0}.menu-toggle span{display:block;background:var(--deep);height:2px;border-radius:2px;width:22px}.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{padding:14px 18px;background:#163B61;color:white;display:flex;align-items:center;justify-content:space-between}.drawer-head .brand{color:white;display:block;font-size:19px;text-align:left}.drawer-head .brand small{display:block;font-size:10px;font-weight:400;letter-spacing:.16em}.close-btn{background:transparent;color:white;border:0;font-size:30px;line-height:1}.drawer-content{padding:12px 19px 30px}.drawer-group{padding-bottom:15px;border-bottom:1px solid var(--edge)}.drawer-group h3{font-size:14px;color:var(--primary);margin:16px 0 8px}.drawer-group a{display:block;padding:6px 2px;color:var(--deep);font-size:14px}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);height:60px;padding-bottom:env(safe-area-inset-bottom);box-sizing:content-box;background:#fff;border-top:1px solid var(--edge);z-index:900}.mobile-bottom a{font-size:12px;text-align:center;line-height:1.1;color:#58718E;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}.mobile-bottom a span{font-size:21px}.mobile-bottom a.is-active{color:var(--primary);font-weight:800}.site-main{padding-bottom:90px}.back-top{bottom:80px}.inner-layout{grid-template-columns:1fr}.sidebar{position:static}.side-box{display:grid;grid-template-columns:repeat(2,1fr);gap:3px 14px}.side-box h2{grid-column:1/-1}.side-box a{border-top:0;border-bottom:1px solid var(--edge)}}
@media(max-width:768px){.container{width:calc(100% - 40px)}.hero-layout,.feature{grid-template-columns:1fr}.hero-visual{order:-1}.hero h1{font-size:30px}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,1fr);gap:27px}.footer-bottom{display:block}.footer-bottom span{display:block;margin:4px 0}.numbered{grid-template-columns:1fr}.mobile-feature{grid-template-columns:1fr 170px}.section{margin-top:30px}}
@media(max-width:480px){.container{width:calc(100% - 32px)}body{font-size:15px;line-height:1.78}.channel-inner{gap:19px}.channel-link{font-size:13px}.site-main{padding-top:21px}.hero{padding:16px}.hero h1{font-size:27px}.page-intro{padding:22px 19px}.page-intro h1{font-size:25px}.section h2{font-size:21px}.card-grid{gap:10px}.card{padding:14px}.card h3{font-size:16px}.card p{font-size:13px}.card-icon{width:34px;height:34px;font-size:17px}.card .more{font-size:13px}.knowledge-grid,.image-grid,.gallery-list,.category-grid{grid-template-columns:1fr}.article-section{padding:20px 18px}.article-section h2{font-size:20px}.article-section p{font-size:15px}.related-grid{gap:10px}.related-item{padding:13px}.mobile-feature{grid-template-columns:1fr}.media-device{max-width:220px;margin-inline:auto}.footer-grid{gap:22px;padding:32px 0}.service-links a{font-size:13px;padding:10px 13px}.faq-item{padding:17px}.head-inner{gap:6px}.brand img{max-width:116px}.brand-mark{font-size:22px}}
@media(max-width:350px){.brand img{max-width:96px;height:26px}.register-btn{min-width:62px;padding:0 9px}.head-inner{gap:3px}.card-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:0.01ms!important;animation-duration:0.01ms!important}}