*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4F8FD;color:#243447;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit}img{max-width:100%}.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}.logo-link{display:flex;align-items:center;text-decoration:none;flex:0 0 auto}.site-logo{display:inline-flex;align-items:center;max-width:168px}.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-placeholder{display:inline-block;width:148px;height:36px;border-radius:10px;background:#EAF3FF}.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;text-decoration:none}.nav-core a.is-current,.nav-core a:hover{background:#E4F0FF;color:#1C63E8}.header-actions{display:flex;gap:10px;align-items:center;flex:0 0 auto}.login-btn,.register-btn{height:42px;min-width:88px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;text-decoration:none;font-weight:700;white-space:nowrap}.login-btn{background:#1C63E8;color:#fff}.register-btn{background:#fff;color:#143250;border:1px solid #C3D6F0}.menu-btn,.mobile-login{display:none}.channel-bar{background:#fff;border-top:1px solid #E7EFF8;border-bottom:1px solid #E7EFF8}.channel-inner{max-width:1220px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:6px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.channel-inner a{padding:11px 10px;text-decoration:none;color:#5B6B7C;font-size:14px}.channel-inner a:hover,.channel-inner a.is-current{color:#1C63E8}.site-main{min-height:60vh}.page-shell{max-width:1220px;margin:0 auto;padding:0 88px 0 20px}.section{padding:76px 0}.section.tight{padding:48px 0}.hero-grid,.split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:38px;align-items:center}.hero-copy h1,.page-title{margin:0 0 20px;color:#143250;font-size:clamp(40px,4.8vw,52px);line-height:1.15;letter-spacing:-.02em}.hero-copy p,.lead{font-size:18px;line-height:1.85;color:#42566C}.eyebrow{display:inline-flex;margin-bottom:16px;padding:7px 12px;border-radius:999px;background:#EAF3FF;color:#1C63E8;font-size:14px;font-weight:700}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.primary-link{height:44px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:#1C63E8;color:#fff;text-decoration:none;font-weight:700}.secondary-link{height:44px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:#fff;border:1px solid #C3D6F0;color:#143250;text-decoration:none;font-weight:700}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:18px;background:#EAF3FF;aspect-ratio:16/9;min-height:228px}.media.hero-media{min-height:280px}.media.card-media{min-height:176px}.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,#EAF3FF,#F9FCFF)}.summary-grid,.three-grid,.four-grid,.topic-grid,.steps-grid,.link-grid{display:grid;gap:22px}.summary-grid,.four-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.three-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.steps-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.panel,.topic-item,.step,.quote,.faq-item,.notice,.index-box{background:#fff;border:1px solid #DCEAFB;border-radius:18px;box-shadow:0 14px 34px rgba(16,48,84,.08);padding:24px;max-width:100%}.panel h2,.panel h3,.topic-item h3,.step h3,.index-box h2,.section-title{margin-top:0;color:#143250}.section-title{font-size:30px;margin-bottom:14px}.section-desc{color:#5B6B7C;line-height:1.8;margin:0 0 28px}.panel p,.topic-item p,.step p,.quote p,.faq-item p,.notice p,.index-box p,.article p,.article li{line-height:1.85}.text-link{display:inline-flex;margin-top:8px;color:#1C63E8;text-decoration:none;font-weight:700}.quick-scroll{display:flex;gap:10px;overflow-x:auto;padding:4px 2px 12px;scrollbar-width:thin}.quick-scroll a{flex:0 0 auto;padding:10px 14px;border-radius:999px;background:#fff;border:1px solid #C3D6F0;text-decoration:none;color:#143250;font-weight:700}.quick-scroll a:hover{color:#1C63E8;border-color:#1C63E8}.article{max-width:860px;margin:0 auto}.article h2{margin:34px 0 12px;color:#143250;font-size:28px}.article h3{margin:28px 0 10px;color:#143250;font-size:21px}.article ul,.article ol{padding-left:1.2em}.article a{color:#1C63E8}.reading-index{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.reading-index a{padding:9px 12px;border-radius:999px;background:#EAF3FF;text-decoration:none;color:#143250}.duo{display:grid;grid-template-columns:1fr 1fr;gap:24px}.feedback-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.faq-list{display:grid;gap:14px}.faq-item h3{margin:0 0 8px;color:#143250;font-size:18px}.topic-item .media{margin-bottom:16px}.topic-item.no-image{min-height:220px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(180deg,#fff,#F6FAFF)}.callout{padding:22px 24px;border-left:4px solid #1C63E8;background:#EAF3FF;border-radius:14px;color:#243447;line-height:1.8}.float-tools{position:fixed;right:14px;top:36%;z-index:9000;display:grid;gap:8px;width:96px}.float-tools a,.float-tools button{min-height:40px;border:1px solid #C3D6F0;border-radius:12px;background:#fff;color:#1C63E8;font:inherit;font-size:13px;font-weight:700;text-decoration:none;display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer}.float-tools .primary{background:#1C63E8;color:#fff;border-color:#1C63E8}.site-footer{background:#0E2338;color:#D5E6F6;padding:56px 20px 22px}.footer-grid{max-width:1220px;margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}.footer-grid h3{margin:0 0 14px;color:#fff;font-size:16px}.footer-grid a{display:block;color:#D5E6F6;text-decoration:none;margin:9px 0}.footer-brand p{line-height:1.8;color:#BFD0E0}.footer-brand .logo-placeholder{background:rgba(255,255,255,.12)}.footer-bottom{max-width:1220px;margin:36px auto 0;padding-top:20px;border-top:1px solid rgba(213,230,246,.18);display:flex;justify-content:space-between;gap:20px;color:#BFD0E0;font-size:13px;line-height:1.7}.mobile-drawer,.drawer-overlay,.mobile-bottom{display:none}
@media(max-width:1100px){.nav-core a{padding:8px 8px;font-size:14px}.header-actions{gap:6px}.login-btn,.register-btn{min-width:74px;padding:0 14px}.page-shell{padding-right:24px}.float-tools{display:none}.summary-grid,.four-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:960px){body{padding-bottom:66px}.site-header{background:#fff}.header-inner{min-height:64px;padding:0 14px;display:grid;grid-template-columns:44px 1fr 72px;gap:8px}.nav-core,.header-actions,.channel-bar{display:none}.menu-btn{display:inline-flex;width:40px;height:40px;border:0;background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0}.menu-btn span{width:22px;height:2px;background:#143250;border-radius:2px}.logo-link{justify-content:center;min-width:0}.site-logo img{height:34px;max-width:150px}.mobile-login{display:inline-flex;height:40px;align-items:center;justify-content:center;border-radius:999px;background:#1C63E8;color:#fff;text-decoration:none;font-weight:700;padding:0 14px;white-space:nowrap}.page-shell{padding:0 16px}.section{padding:52px 0}.section.tight{padding:34px 0}.hero-grid,.split{grid-template-columns:1fr;gap:24px}.hero-copy h1,.page-title{font-size:clamp(28px,8vw,36px)}.hero-grid.reverse-mobile .hero-copy{order:2}.hero-grid.reverse-mobile .media{order:1}.media.hero-media{min-height:200px}.media{min-height:210px}.media.card-media{min-height:168px}.three-grid,.steps-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.duo,.link-grid,.feedback-list{grid-template-columns:1fr}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;z-index:11050;width:min(86vw,328px);background:#fff;transform:translateX(-105%);transition:transform .24s ease;overflow-y:auto;padding:16px}.mobile-drawer.is-open{transform:translateX(0)}.drawer-overlay{display:block;position:fixed;inset:0;z-index:11000;background:rgba(14,35,56,.42);opacity:0;visibility:hidden;transition:.2s}.drawer-overlay.is-open{opacity:1;visibility:visible}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid #E7EFF8}.drawer-head a{text-decoration:none}.drawer-close{width:40px;height:40px;border:0;background:#EAF3FF;border-radius:50%;font-size:28px;color:#143250}.drawer-group{padding:16px 0;border-bottom:1px solid #EEF3F8}.drawer-group strong{display:block;margin-bottom:8px;color:#7A8896;font-size:13px}.drawer-group a{display:block;padding:9px 4px;text-decoration:none;color:#143250}.drawer-open{overflow:hidden}.mobile-bottom{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:9500;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid #DCEAFB;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:58px;display:flex;align-items:center;justify-content:center;text-decoration:none;color:#143250;font-weight:700;font-size:14px}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.site-footer{padding-bottom:30px}}
@media(max-width:560px){.summary-grid,.four-grid,.three-grid,.steps-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic-item{padding:16px}.topic-item h3{font-size:17px}.topic-item p{font-size:14px}.section-title{font-size:25px}.footer-grid{grid-template-columns:1fr}.panel,.step,.quote,.faq-item,.notice,.index-box{padding:20px}.hero-copy p,.lead{font-size:16px}.media.hero-media{min-height:190px}}