*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4FBFF;color:#223044;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.78;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:inherit}img{max-width:100%}.site-header{position:sticky;top:0;z-index:9999;width:100%;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);box-shadow:0 8px 24px rgba(8,119,201,.08)}.header-inner{max-width:1180px;min-height:72px;margin:0 auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-logo{display:flex;align-items:center;flex:0 0 auto;text-decoration:none}.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-fallback{font-size:22px;font-weight:900;color:#0877C9;white-space:nowrap}.logo-fallback.light{color:#EAF8FF}.nav-core{display:flex;align-items:center;justify-content:center;gap:4px;min-width:0}.nav-core a{color:#1D2A3A;padding:8px 12px;font-weight:700;text-decoration:none;white-space:nowrap;border-radius:10px}.nav-core a.is-current,.nav-core a:hover{color:#0877C9;background:#EAF7FF}.main-btn{display:inline-flex;align-items:center;justify-content:center;height:42px;min-width:96px;padding:0 20px;background:linear-gradient(135deg,#38C7FF 0%,#1CA8F6 48%,#0877C9 100%);color:#fff;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 12px 26px rgba(8,119,201,.18);white-space:nowrap}.channel-strip{background:#EAF7FF;border-top:1px solid rgba(28,168,246,.1);overflow:hidden}.channel-track{max-width:1180px;margin:0 auto;padding:0 18px;display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none}.channel-track::-webkit-scrollbar{display:none}.channel-track a{flex:0 0 auto;text-decoration:none;color:#5F7082;font-size:14px;font-weight:700;padding:11px 10px;white-space:nowrap}.channel-track a:hover{color:#0877C9}.menu-toggle{display:none;border:0;background:transparent;padding:8px;width:42px;height:42px}.menu-toggle span{display:block;height:2px;background:#0877C9;margin:5px 0;border-radius:2px}.mobile-drawer,.drawer-mask{display:none}.site-main{width:100%;padding-bottom:24px}.shell{width:min(1180px,calc(100% - 36px));margin:0 auto}.section{padding:52px 0}.section-tight{padding:34px 0}.eyebrow{margin:0 0 10px;color:#0877C9;font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.page-hero{padding:54px 0 26px}.page-hero .hero-box{background:#fff;border:1px solid rgba(28,168,246,.12);border-radius:24px;padding:42px;box-shadow:0 16px 40px rgba(8,119,201,.08)}h1,h2,h3{color:#0877C9;line-height:1.28;margin-top:0}h1{font-size:clamp(30px,4.2vw,46px);margin-bottom:16px}h2{font-size:clamp(23px,2.7vw,32px);margin-bottom:15px}h3{font-size:19px;margin-bottom:9px}.lead{font-size:18px;color:#42556A;max-width:840px;margin:0}.muted{color:#6B7D8E}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-head p{margin:0;max-width:650px;color:#687A8D}.slider-wrap{padding:26px 0 22px}.hero-slider{position:relative;width:min(1180px,calc(100% - 36px));height:330px;margin:0 auto;border-radius:18px;background:#fff;box-shadow:0 16px 40px rgba(8,119,201,.08);overflow:hidden}.slide{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .35s ease}.slide.is-active{opacity:1;pointer-events:auto}.slide img{width:100%;height:100%;object-fit:contain;display:block}.slide-placeholder{display:block;width:100%;height:100%;background:linear-gradient(135deg,#EAF7FF,#F8FCFF)}.slider-arrow{position:absolute;z-index:4;top:50%;transform:translateY(-50%);width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,255,255,.9);color:#0877C9;font-size:28px;cursor:pointer;box-shadow:0 8px 22px rgba(8,119,201,.16)}.slider-prev{left:16px}.slider-next{right:16px}.slider-dots{position:absolute;left:0;right:0;bottom:14px;z-index:4;display:flex;justify-content:center;gap:8px}.slider-dot{width:9px;height:9px;border:0;border-radius:50%;background:#B8DDF2;padding:0;cursor:pointer}.slider-dot.is-active{width:26px;border-radius:999px;background:#0877C9}.route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.route-card{background:#fff;border-radius:18px;padding:23px;border:1px solid rgba(28,168,246,.12);box-shadow:0 16px 40px rgba(8,119,201,.06);text-decoration:none;min-height:188px;display:flex;flex-direction:column;justify-content:space-between}.route-card span{display:inline-flex;width:34px;height:34px;border-radius:10px;background:#EAF7FF;color:#0877C9;align-items:center;justify-content:center;font-weight:900}.route-card p{margin:8px 0 0;color:#65778A}.route-card:hover{transform:translateY(-2px);border-color:rgba(28,168,246,.32)}.topic-rail{display:flex;gap:10px;overflow-x:auto;padding:4px 0 8px;scrollbar-width:none}.topic-rail::-webkit-scrollbar{display:none}.topic-rail a{flex:0 0 auto;text-decoration:none;padding:9px 16px;border-radius:999px;background:#fff;border:1px solid rgba(28,168,246,.16);color:#0877C9;font-weight:800;white-space:nowrap}.topic-rail a:hover{background:#EAF7FF}.feature-split{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.feature-main,.stack-card,.info-card,.article-card,.note-box,.index-panel,.step-item,.faq-item{background:#fff;border:1px solid rgba(28,168,246,.12);border-radius:18px;box-shadow:0 16px 40px rgba(8,119,201,.06)}.feature-main{padding:28px}.feature-main .meta-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.text-link{color:#0877C9;font-weight:800;text-decoration:none}.text-link:hover{text-decoration:underline}.stack{display:grid;gap:14px}.stack-card{padding:19px}.stack-card p,.info-card p,.article-card p,.step-item p{margin:0;color:#5F7082}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.info-card{padding:24px}.boundary{max-width:840px;margin:0 auto;background:#EAF7FF;border-radius:18px;padding:28px;color:#42556A;border:1px solid rgba(28,168,246,.12)}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#EAF7FF;aspect-ratio:16/9}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#EAF7FF,#F9FDFF)}.detail-media{min-height:210px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}.reading{max-width:820px;margin:0 auto}.reading p{font-size:17px;margin:0 0 1.15em}.reading ul,.reading ol{padding-left:1.2em}.reading li{margin:.55em 0}.article-card{padding:28px}.article-card+.article-card{margin-top:18px}.index-panel{padding:24px}.index-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.index-links a{display:block;padding:12px 14px;border-radius:12px;background:#F4FBFF;color:#0877C9;text-decoration:none;font-weight:800}.step-list{display:grid;gap:14px;counter-reset:steps}.step-item{position:relative;padding:22px 22px 22px 70px;counter-increment:steps}.step-item:before{content:counter(steps);position:absolute;left:20px;top:20px;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#EAF7FF;color:#0877C9;font-weight:900}.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.compare-grid .article-card{margin:0}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.related-grid a{display:block;text-decoration:none;background:#fff;border:1px solid rgba(28,168,246,.12);border-radius:16px;padding:20px;font-weight:800;color:#0877C9}.related-grid a span{display:block;color:#6A7C8D;font-size:14px;font-weight:400;margin-top:8px}.service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.service-line{background:#fff;border-radius:16px;padding:20px;border:1px solid rgba(28,168,246,.12)}.service-line h3{margin-bottom:6px}.service-line p{margin:0;color:#66798B}.faq-list{display:grid;gap:14px}.faq-item{padding:24px}.faq-item h2{font-size:20px}.faq-item p{margin:0}.desktop-float{position:fixed;right:14px;top:38%;z-index:8000;display:grid;gap:8px;width:98px}.desktop-float a,.desktop-float button{border:1px solid rgba(28,168,246,.18);background:#fff;color:#0877C9;text-decoration:none;border-radius:12px;padding:10px 8px;text-align:center;font-weight:800;font-size:13px;box-shadow:0 10px 24px rgba(8,119,201,.09);cursor:pointer}.desktop-float .float-register{background:linear-gradient(135deg,#38C7FF,#1CA8F6 50%,#0877C9);color:#fff}.site-footer{background:#082A46;color:#EAF8FF;margin-top:46px}.footer-grid{max-width:1180px;margin:0 auto;padding:46px 18px 34px;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}.footer-grid h2{color:#fff;font-size:17px}.footer-grid a{display:block;color:#CDEAF9;text-decoration:none;margin:8px 0}.footer-grid a:hover{color:#fff}.footer-brand p{color:#CDEAF9;max-width:300px}.footer-logo img{height:40px;width:auto;max-width:168px;object-fit:contain}.footer-bottom{border-top:1px solid rgba(234,248,255,.12);padding:18px;text-align:center;color:#CDEAF9;font-size:13px}.mobile-bottom{display:none}
@media(max-width:1180px){.desktop-float{display:none}.route-grid{grid-template-columns:repeat(2,1fr)}.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:980px){.nav-core,.channel-strip{display:none}.header-inner{min-height:66px;gap:10px}.menu-toggle{display:block;flex:0 0 42px}.header-action{height:40px;min-width:82px;padding:0 14px}.site-logo img{height:36px;max-width:150px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#fff;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;box-shadow:18px 0 40px rgba(8,119,201,.16);overflow-y:auto}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(8,42,70,.42);z-index:11000;opacity:0;pointer-events:none;transition:opacity .18s ease}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;z-index:2;display:flex;align-items:center;justify-content:space-between;padding:14px;border-bottom:1px solid #EAF7FF}.drawer-logo img{height:36px;width:auto;max-width:150px;object-fit:contain}.drawer-close{width:42px;height:42px;border:0;border-radius:50%;background:#EAF7FF;color:#0877C9;font-size:28px}.drawer-groups{padding:6px 14px 24px}.drawer-groups section{padding:14px 0;border-bottom:1px solid #EAF7FF}.drawer-groups h2{font-size:13px;color:#7A8A9A;margin:0 0 8px}.drawer-groups a{display:block;text-decoration:none;color:#223044;padding:8px 2px;font-weight:700}.footer-grid{grid-template-columns:repeat(2,1fr)}.feature-split,.two-col{grid-template-columns:1fr}.compare-grid{grid-template-columns:1fr}.mobile-bottom{position:fixed;z-index:9000;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid #DDEFF9;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{text-align:center;text-decoration:none;color:#42556A;font-size:13px;font-weight:800;padding:11px 4px}.site-footer{margin-bottom:48px}.site-main{padding-bottom:20px}.hero-slider{height:250px}}
@media(max-width:640px){.shell{width:min(100% - 28px,1180px)}.section{padding:34px 0}.section-tight{padding:24px 0}.page-hero{padding:30px 0 18px}.page-hero .hero-box{padding:26px 20px;border-radius:20px}h1{font-size:30px}.lead{font-size:16px}.hero-slider{width:calc(100% - 28px);height:180px}.slider-arrow{width:36px;height:36px;font-size:24px}.slider-prev{left:8px}.slider-next{right:8px}.route-grid,.three-grid,.service-list,.index-links,.related-grid{grid-template-columns:1fr}.feature-main,.article-card,.index-panel,.boundary{padding:22px}.detail-media{min-height:180px}.footer-grid{grid-template-columns:1fr;gap:18px;padding-top:34px}.section-head{display:block}.section-head p{margin-top:6px}.header-inner{padding:0 12px}.header-action{font-size:14px}.site-logo img{max-width:132px;height:34px}.reading p{font-size:16px}}