*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4F8FD;color:#243447;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}img{max-width:100%}a{color:#1C63E8;text-decoration:none}a:hover{text-decoration:none}.site-header{position:sticky;top:0;z-index:9999;width:100%;background:rgba(247,251,255,.96);box-shadow:0 8px 24px rgba(16,48,84,.08);backdrop-filter:blur(14px)}.header-inner{max-width:1220px;min-height:72px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.site-logo,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;min-width:132px}.site-logo img,.drawer-logo img,.footer-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-text{font-weight:900;font-size:24px;color:#143250;letter-spacing:.04em}.nav-core{display:flex;align-items:center;gap:6px;white-space:nowrap;flex-wrap:nowrap}.nav-core a{color:#143250;padding:8px 12px;border-radius:999px;font-weight:700}.nav-core a.is-current,.nav-core a:hover{background:#E4F0FF;color:#1C63E8}.header-actions{display:flex;gap:10px}.login-btn,.register-btn{height:42px;min-width:88px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:700;white-space:nowrap}.login-btn{background:#1C63E8;color:#FFF}.register-btn{background:#FFF;color:#143250;border:1px solid #C3D6F0}.menu-toggle,.mobile-login{display:none}.channel-bar{background:#FFF;border-top:1px solid #EEF4FB;border-bottom:1px solid #E5EEF8}.channel-scroll{max-width:1220px;margin:0 auto;padding:0 20px;display:flex;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.channel-scroll a{display:block;padding:11px 12px;color:#5B6B7C;font-size:14px;font-weight:700}.channel-scroll a:hover,.channel-scroll a.is-current{color:#1C63E8;background:#F4F8FD}.site-main{min-height:60vh}.container{width:min(1220px,calc(100% - 40px));margin:0 auto}.reader{width:min(860px,calc(100% - 40px));margin:0 auto}.section{padding:72px 0}.section-sm{padding:48px 0}.hero{padding:72px 0 68px}.hero-grid,.two-col{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(320px,.84fr);gap:42px;align-items:center}.two-col.reverse{grid-template-columns:minmax(320px,.84fr) minmax(0,1.16fr)}.eyebrow{margin:0 0 10px;color:#1C63E8;font-size:14px;font-weight:900;letter-spacing:.08em}.hero h1,.page-hero h1{margin:0;color:#143250;font-size:clamp(40px,5vw,52px);line-height:1.15;letter-spacing:-.03em}.hero-lead,.page-lead{font-size:18px;color:#5B6B7C;max-width:760px;margin:20px 0 0}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.hero-actions .login-btn,.hero-actions .register-btn{min-width:112px}.page-hero{padding:64px 0 46px}.page-hero .inner{max-width:900px}.breadcrumb{display:flex;gap:8px;align-items:center;color:#7A8896;font-size:14px;margin-bottom:14px}.breadcrumb a{color:#5B6B7C}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:18px;background:#EAF3FF;aspect-ratio:16/9;border:1px solid #DCEAFB}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media-hero{height:280px;aspect-ratio:auto}.media-standard{height:246px;aspect-ratio:auto}.media-card{height:176px;aspect-ratio:auto}.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#EAF3FF,#F8FBFF);color:#84A4C7;font-weight:800;letter-spacing:.08em}.cards-4,.cards-3,.topic-grid,.qa-grid,.review-grid,.link-grid{display:grid;gap:22px}.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.qa-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.link-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.card,.topic-card,.qa-card,.review-card,.info-panel,.step,.notice-box,.index-card{background:#FFF;border:1px solid #DCEAFB;border-radius:18px;box-shadow:0 14px 34px rgba(16,48,84,.08)}.card,.qa-card,.review-card,.info-panel,.step,.notice-box,.index-card{padding:24px}.card h2,.card h3,.qa-card h2,.qa-card h3,.review-card h3,.info-panel h2,.info-panel h3,.step h3,.notice-box h2,.index-card h2,.index-card h3{margin:0 0 10px;color:#143250;line-height:1.35}.card p,.qa-card p,.review-card p,.info-panel p,.step p,.notice-box p,.index-card p{margin:0;color:#5B6B7C}.topic-card{overflow:hidden}.topic-copy{padding:18px}.topic-copy h3{margin:0 0 8px;color:#143250}.topic-copy p{margin:0 0 10px;color:#5B6B7C;font-size:14px;line-height:1.65}.text-link{display:inline-flex;align-items:center;gap:5px;color:#1C63E8;font-weight:800}.text-link::after{content:'→'}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-head h2{margin:0;color:#143250;font-size:clamp(28px,3vw,38px);line-height:1.2}.section-head p{margin:0;max-width:620px;color:#7A8896}.soft{background:#EAF3FF}.blue-band{background:#EAF3FF}.quick-scroll{display:flex;gap:12px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}.quick-scroll a{flex:0 0 auto;padding:11px 16px;background:#FFF;border:1px solid #C3D6F0;border-radius:999px;color:#143250;font-weight:800}.quick-scroll a:hover{border-color:#1C63E8;color:#1C63E8}.split-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.stack{display:grid;gap:18px}.mini-list{margin:0;padding-left:1.2em;color:#5B6B7C}.mini-list li+li{margin-top:8px}.kicker{font-weight:800;color:#1C63E8}.meta-note{font-size:14px;color:#7A8896}.article h2{color:#143250;font-size:28px;line-height:1.35;margin:34px 0 12px}.article h3{color:#143250;font-size:20px;margin:26px 0 8px}.article p{font-size:17px;margin:0 0 18px}.article ul,.article ol{font-size:17px;padding-left:1.35em}.article li+li{margin-top:10px}.toc{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.toc a{padding:8px 12px;border-radius:999px;background:#FFF;border:1px solid #DCEAFB;color:#143250;font-weight:700}.steps{counter-reset:step;display:grid;gap:16px}.step{position:relative;padding-left:72px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:22px;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#1C63E8;color:#FFF;font-weight:900}.quote{padding:18px 22px;border-left:4px solid #1C63E8;background:#FFF;border-radius:0 14px 14px 0;color:#5B6B7C}.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.table-wrap{overflow-x:auto}.simple-table{width:100%;border-collapse:collapse;background:#FFF;border-radius:18px;overflow:hidden}.simple-table th,.simple-table td{padding:16px 18px;border-bottom:1px solid #E6EEF8;text-align:left;vertical-align:top}.simple-table th{color:#143250;background:#F8FBFF}.simple-table td{color:#5B6B7C}.faq-list{display:grid;gap:16px}.faq-item{background:#FFF;border:1px solid #DCEAFB;border-radius:18px;padding:24px}.faq-item h2,.faq-item h3{margin:0 0 10px;color:#143250}.faq-item p{margin:0;color:#5B6B7C}.site-footer{background:#0E2338;color:#D5E6F6;padding:56px 0 96px}.footer-inner{width:min(1220px,calc(100% - 40px));margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}.footer-inner h2{margin:0 0 14px;color:#FFF;font-size:16px}.footer-inner a{display:block;color:#D5E6F6;margin:6px 0}.footer-brand p{max-width:380px;margin:16px 0 0;color:#AAC0D4}.footer-logo-text{color:#FFF}.footer-bottom{width:min(1220px,calc(100% - 40px));margin:34px auto 0;padding-top:22px;border-top:1px solid rgba(213,230,246,.15);display:flex;justify-content:space-between;gap:24px;color:#9EB5CA;font-size:13px}.footer-bottom p{margin:0}.floating-tools{position:fixed;right:16px;top:42%;z-index:8000;display:grid;gap:8px;width:72px}.floating-tools a{padding:10px 8px;text-align:center;background:#FFF;color:#1C63E8;border:1px solid #DCEAFB;border-radius:12px;box-shadow:0 10px 24px rgba(16,48,84,.08);font-size:12px;font-weight:800}.floating-tools .float-primary{background:#1C63E8;color:#FFF}.mobile-bottom,.mobile-drawer,.drawer-overlay,.noscript-mobile{display:none}.spacer-right{padding-right:84px}.pill{display:inline-flex;padding:5px 10px;border-radius:999px;background:#EAF3FF;color:#1C63E8;font-size:13px;font-weight:800}.accent-line{height:1px;background:#DCEAFB;margin:24px 0}.notice-list{display:grid;gap:12px}.notice-row{display:flex;justify-content:space-between;gap:18px;padding:16px 0;border-bottom:1px solid #E6EEF8}.notice-row:last-child{border-bottom:0}.notice-row strong{color:#143250}.notice-row span{color:#7A8896;font-size:14px}.mobile-only{display:none}
@media(max-width:1100px){.nav-core a{padding:8px 8px;font-size:14px}.header-actions .login-btn,.header-actions .register-btn{min-width:72px;padding:0 14px}.cards-4,.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.link-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.spacer-right{padding-right:0}.floating-tools{display:none}}
@media(max-width:820px){body{padding-bottom:66px}.header-inner{min-height:62px;padding:0 14px;display:grid;grid-template-columns:46px minmax(0,1fr) 72px;gap:8px}.site-logo{justify-content:center;min-width:0}.site-logo img{height:34px;max-width:150px}.nav-core,.header-actions,.channel-bar{display:none}.menu-toggle{display:inline-flex;width:42px;height:42px;border:0;background:transparent;padding:10px 8px;flex-direction:column;justify-content:center;gap:5px}.menu-toggle span{display:block;height:2px;background:#143250;border-radius:4px;width:24px}.mobile-login{display:inline-flex;height:40px;align-items:center;justify-content:center;background:#1C63E8;color:#FFF;border-radius:999px;font-weight:800}.hero,.page-hero{padding:48px 0 36px}.hero-grid,.two-col,.two-col.reverse{grid-template-columns:1fr;gap:26px}.two-col.reverse .media{order:2}.hero h1,.page-hero h1{font-size:clamp(30px,9vw,36px)}.hero-lead,.page-lead{font-size:17px}.section{padding:52px 0}.section-sm{padding:38px 0}.media-hero{height:210px}.media-standard{height:228px}.cards-4,.cards-3,.review-grid,.link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.qa-grid,.split-list,.compare{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{display:grid}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#FFF;border-top:1px solid #DCEAFB;box-shadow:0 -8px 24px rgba(16,48,84,.08)}.mobile-bottom a{height:58px;display:flex;align-items:center;justify-content:center;color:#143250;font-size:13px;font-weight:800}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(14,35,56,.35);z-index:10000}.drawer-overlay[hidden]{display:none}.mobile-drawer{display:block;position:fixed;top:0;bottom:0;left:0;width:min(86vw,328px);background:#FFF;z-index:10001;transform:translateX(-104%);transition:transform .22s ease;overflow-y:auto;box-shadow:14px 0 34px rgba(16,48,84,.16)}.mobile-drawer.is-open{transform:translateX(0)}.drawer-head{position:sticky;top:0;background:#FFF;display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid #E6EEF8}.drawer-logo img{height:34px;max-width:150px}.drawer-close{width:40px;height:40px;border:1px solid #DCEAFB;background:#FFF;border-radius:50%;font-size:26px;line-height:1;color:#143250}.drawer-groups{padding:8px 16px 28px}.drawer-groups section{padding:14px 0;border-bottom:1px solid #EEF4FB}.drawer-groups h2{font-size:13px;color:#7A8896;margin:0 0 8px}.drawer-groups a{display:block;padding:7px 0;color:#143250;font-weight:700}.drawer-open{overflow:hidden}.noscript-mobile{padding:10px 14px;background:#FFF;border-bottom:1px solid #DCEAFB;overflow-x:auto;white-space:nowrap}.noscript-mobile a{display:inline-block;margin-right:14px;color:#143250;font-weight:700}.section-head{display:block}.section-head p{margin-top:10px}.mobile-only{display:block}}
@media(max-width:560px){.container,.reader{width:min(100% - 28px,1220px)}.hero,.page-hero{padding-top:40px}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.hero-actions .login-btn,.hero-actions .register-btn{width:100%;min-width:0}.cards-4,.cards-3,.review-grid,.link-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-copy{padding:14px}.topic-copy h3{font-size:16px}.topic-copy p{font-size:13px}.media-card{height:168px}.media-standard{height:220px}.article p,.article ul,.article ol{font-size:16px}.article h2{font-size:25px}.footer-inner{grid-template-columns:1fr}.footer-brand{grid-column:auto}.notice-row{display:block}.notice-row span{display:block;margin-top:4px}.step{padding-left:62px;padding-right:18px}.step:before{left:18px}.site-footer{padding-bottom:86px}}
@media(max-width:390px){.header-inner{grid-template-columns:44px minmax(0,1fr) 66px;padding:0 10px}.site-logo img{max-width:138px}.mobile-login{font-size:14px}.topic-grid{grid-template-columns:1fr 1fr}.media-card{height:168px}}

@media(min-width:1101px){.site-main .container:not(.spacer-right){padding-right:84px}}