*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:#F4F8FD;color:#243447;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:#154FC0;text-decoration:none}a:hover{color:#1C63E8}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}.site-logo{display:inline-flex;align-items:center;min-width:118px}.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-text{font-weight:900;font-size:22px;color:#143250;white-space:nowrap}.logo-placeholder{display:block;width:150px;height:38px;max-width:100%;border-radius:10px;background:#EAF3FF;border:1px solid #DCEAFB}.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;align-items:center;gap:10px}.login-btn{height:42px;min-width:88px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;background:#1C63E8;color:#FFF;border-radius:999px;text-decoration:none;font-weight:700;white-space:nowrap}.register-btn{height:42px;min-width:88px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;background:#FFF;color:#143250;border:1px solid #C3D6F0;border-radius:999px;text-decoration:none;font-weight:700;white-space:nowrap}.mobile-header{display:none}.channel-bar{background:#FFF;border-top:1px solid #EAF3FF;border-bottom:1px solid #DCEAFB}.channel-inner{max-width:1220px;margin:0 auto;padding:0 20px;display:flex;gap:4px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.channel-inner a{flex:0 0 auto;padding:11px 10px;color:#5B6B7C;font-size:14px}.channel-inner a:hover,.channel-inner a.is-current{color:#1C63E8;background:#F4F8FD}.site-main{max-width:100%;overflow:hidden}.section{padding:72px 20px}.section-tight{padding:64px 20px}.container{width:100%;max-width:1220px;margin:0 auto}.reading{max-width:840px;margin:0 auto}.hero{padding-top:58px}.hero-grid,.split{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:36px;align-items:center}.hero-copy h1,.page-hero h1{font-size:clamp(40px,5vw,52px);line-height:1.15;color:#143250;margin:0 0 20px;letter-spacing:-.02em}.page-hero h1{font-size:clamp(40px,4vw,48px)}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#1C63E8;font-weight:800;font-size:14px;letter-spacing:.08em;margin-bottom:14px}.lead{font-size:18px;color:#4B5F73;margin:0 0 24px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.primary-btn{min-height:44px;padding:0 22px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:#1C63E8;color:#FFF;font-weight:800}.primary-btn:hover{background:#154FC0;color:#FFF}.text-link{font-weight:800;color:#154FC0}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:18px;background:#EAF3FF;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,#EAF3FF,#F8FBFF);border:1px solid #DCEAFB}.hero-media{height:280px}.feature-media{height:244px}.card-media{height:176px}.grid-2,.grid-3,.grid-4{display:grid;gap:22px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card,.soft-card,.note-card,.quote-card,.faq-item{background:#FFF;border:1px solid #DCEAFB;border-radius:18px;box-shadow:0 14px 34px rgba(16,48,84,.08)}.card{padding:24px}.soft-card{padding:22px;background:#F9FCFF}.note-card{padding:24px;background:#EAF3FF}.card h2,.card h3,.soft-card h2,.soft-card h3,.note-card h2,.note-card h3{color:#143250;margin-top:0}.section-title{margin:0 0 12px;color:#143250;font-size:32px;line-height:1.25}.section-intro{max-width:780px;color:#5B6B7C;margin:0 0 28px}.summary-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.summary-strip a{display:block;background:#FFF;border:1px solid #DCEAFB;border-radius:18px;padding:20px;color:#143250;font-weight:800;box-shadow:0 14px 34px rgba(16,48,84,.06)}.summary-strip small{display:block;color:#7A8896;font-weight:400;margin-top:5px}.quick-scroll{display:flex;gap:10px;overflow-x:auto;padding:4px 0 10px;scrollbar-width:thin}.quick-scroll a{flex:0 0 auto;background:#FFF;border:1px solid #C3D6F0;border-radius:999px;padding:9px 14px;color:#143250;font-weight:700}.matrix-item{background:#FFF;border:1px solid #DCEAFB;border-radius:18px;padding:14px;box-shadow:0 14px 34px rgba(16,48,84,.06)}.matrix-item h3{margin:14px 0 6px;color:#143250;font-size:18px}.matrix-item p{margin:0 0 8px;color:#5B6B7C;font-size:14px}.matrix-item.text-only{min-height:220px;display:flex;flex-direction:column;justify-content:center;background:linear-gradient(135deg,#FFF,#F3F8FF)}.timeline{display:grid;gap:14px}.timeline-item{display:grid;grid-template-columns:38px 1fr;gap:14px;align-items:start}.timeline-no{width:38px;height:38px;border-radius:12px;background:#E4F0FF;color:#1C63E8;display:grid;place-items:center;font-weight:900}.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare>div{background:#FFF;border:1px solid #DCEAFB;border-radius:18px;padding:24px}.plain-list{margin:0;padding-left:20px}.plain-list li{margin:8px 0}.tag-list{display:flex;flex-wrap:wrap;gap:10px}.tag-list a,.tag-list span{background:#EAF3FF;border:1px solid #DCEAFB;border-radius:999px;padding:8px 12px;color:#143250}.quote-card{padding:22px}.quote-card p{margin:0;color:#4B5F73}.faq-list{display:grid;gap:14px}.faq-item{padding:22px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:#143250}.faq-item p{margin:0}.page-hero{padding:62px 20px 34px}.breadcrumbs{font-size:14px;color:#7A8896;margin-bottom:16px}.breadcrumbs a{color:#5B6B7C}.article p{margin:0 0 18px}.article h2{color:#143250;font-size:28px;line-height:1.3;margin:34px 0 14px}.article h3{color:#143250;font-size:21px;margin:26px 0 10px}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a{background:#FFF;border:1px solid #C3D6F0;border-radius:12px;padding:10px 14px}.responsibility{background:#EAF3FF;border:1px solid #DCEAFB;border-radius:18px;padding:22px}.floating-tools{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:900;display:flex;flex-direction:column;gap:8px;width:98px}.floating-tools a{background:#FFF;border:1px solid #C3D6F0;border-radius:12px;padding:10px 8px;text-align:center;color:#1C63E8;font-size:13px;font-weight:800;box-shadow:0 10px 24px rgba(16,48,84,.08)}.floating-tools .floating-primary{background:#1C63E8;color:#FFF;border-color:#1C63E8}.site-footer{background:#0E2338;color:#D5E6F6;padding:58px 20px 24px}.footer-grid{max-width:1220px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}.footer-grid h2{font-size:16px;color:#FFF;margin:0 0 14px}.footer-grid a{display:block;color:#D5E6F6;margin:7px 0}.footer-brand p{max-width:360px;margin:14px 0 0}.footer-logo-text{color:#FFF}.footer-bottom{max-width:1220px;margin:36px auto 0;padding-top:22px;border-top:1px solid rgba(213,230,246,.16);font-size:13px;color:#AFC7DB;display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap}.mobile-bottom-nav{display:none}.drawer-overlay,.mobile-drawer{display:none}.pill{display:inline-flex;border-radius:999px;background:#EAF3FF;color:#1C63E8;padding:5px 10px;font-size:13px;font-weight:800}.stat-line{display:flex;gap:18px;flex-wrap:wrap}.stat-line span{background:#FFF;border:1px solid #DCEAFB;border-radius:14px;padding:10px 14px;color:#5B6B7C}.spacer-top{margin-top:28px}.muted{color:#7A8896}.center{text-align:center}.notice{border-left:4px solid #1C63E8;background:#FFF;padding:18px 20px;border-radius:0 16px 16px 0}.index-special-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}.duo{display:grid;grid-template-columns:1fr 1fr;gap:22px}.steps{counter-reset:step;display:grid;gap:14px}.step{position:relative;background:#FFF;border:1px solid #DCEAFB;border-radius:18px;padding:20px 20px 20px 62px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:10px;background:#1C63E8;color:#FFF;display:grid;place-items:center;font-weight:900}.mini-index{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.mini-index a{background:#FFF;border:1px solid #DCEAFB;border-radius:14px;padding:14px;text-align:center;font-weight:800;color:#143250}
@media(max-width:1100px){.nav-core a{padding:8px 8px;font-size:14px}.header-actions{gap:6px}.login-btn,.register-btn{min-width:72px;padding:0 12px}.floating-tools{display:none}.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}.site-main{padding-right:0}}
@media(max-width:900px){.desktop-header,.channel-bar{display:none}.mobile-header{height:64px;padding:0 14px;display:grid;grid-template-columns:72px minmax(0,1fr) 72px;align-items:center;gap:8px}.menu-button{width:44px;height:44px;border:0;background:#FFF;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;box-shadow:0 8px 20px rgba(16,48,84,.08)}.menu-button span{width:19px;height:2px;background:#143250}.mobile-logo{justify-content:center;min-width:0}.mobile-logo img{height:34px;max-width:150px}.mobile-login{justify-self:end;width:64px;height:40px;border-radius:999px;background:#1C63E8;color:#FFF;display:grid;place-items:center;font-weight:800}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(14,35,56,.42);opacity:0;visibility:hidden;transition:.22s;z-index:10000}.drawer-overlay.is-open{opacity:1;visibility:visible}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;width:min(86vw,328px);background:#FFF;z-index:10001;transform:translateX(-102%);transition:transform .24s ease;overflow-y:auto;box-shadow:20px 0 50px rgba(14,35,56,.2)}.mobile-drawer.is-open{transform:translateX(0)}.drawer-head{min-height:68px;padding:12px 14px;border-bottom:1px solid #EAF3FF;display:flex;align-items:center;justify-content:space-between}.drawer-close{width:42px;height:42px;border:1px solid #DCEAFB;background:#FFF;border-radius:12px;font-size:25px;color:#143250}.drawer-groups{padding:8px 14px 26px}.drawer-groups section{padding:12px 0;border-bottom:1px solid #EAF3FF}.drawer-groups h2{font-size:13px;color:#7A8896;margin:0 0 6px}.drawer-groups a{display:block;color:#143250;padding:8px 4px;font-weight:700}.hero-grid,.split,.index-special-grid,.duo,.compare{grid-template-columns:1fr}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.summary-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mini-index{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer{padding-bottom:88px}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:950;display:grid;grid-template-columns:repeat(4,1fr);background:#FFF;border-top:1px solid #DCEAFB;box-shadow:0 -8px 20px rgba(16,48,84,.08);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom-nav a{min-height:58px;display:grid;place-items:center;color:#143250;font-weight:800;font-size:14px}}
@media(max-width:640px){.section{padding:52px 16px}.section-tight{padding:48px 16px}.page-hero{padding:46px 16px 24px}.hero-copy h1,.page-hero h1{font-size:clamp(28px,9vw,36px)}.lead{font-size:16px}.hero-media{height:205px}.feature-media{height:220px}.grid-2,.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card{padding:20px}.card-media{height:168px}.section-title{font-size:28px}.footer-grid{grid-template-columns:1fr}.summary-strip{gap:12px}.summary-strip a{padding:16px}.mobile-header{grid-template-columns:66px minmax(0,1fr) 66px}.mobile-logo img{max-width:138px;height:32px}.floating-tools{display:none}}

@media(min-width:1101px){.site-main{padding-right:68px}}