*{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;font-size:16px;line-height:1.82;overflow-x:hidden}
a{color:#1C63E8;text-underline-offset:3px}
img,svg{max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.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;flex:0 0 auto;text-decoration:none}
.site-logo img,.drawer-logo img,.footer-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-fallback{display:inline-flex;min-width:132px;height:40px;padding:0 14px;align-items:center;justify-content:center;border-radius:12px;background:#EAF3FF;color:#143250;font-weight:800;letter-spacing:.05em}
.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;white-space:nowrap}
.login-btn{height:42px;min-width:88px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;background:#1C63E8;color:#FFFFFF;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:#FFFFFF;color:#143250;border:1px solid #C3D6F0;border-radius:999px;text-decoration:none;font-weight:700;white-space:nowrap}
.mobile-only{display:none}
.channel-strip{background:#FFFFFF;border-top:1px solid #EDF3FA;border-bottom:1px solid #E6EFF8}
.channel-inner{max-width:1220px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:4px;overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-width:thin;white-space:nowrap}
.channel-inner a{flex:0 0 auto;color:#5B6B7C;text-decoration:none;padding:10px 12px;font-size:14px}
.channel-inner a:hover{color:#1C63E8}
.site-main{min-height:60vh;padding-right:68px}
.page-shell{width:min(1220px,calc(100% - 40px));margin:0 auto}
.section{padding:72px 0}
.section.compact{padding:44px 0}
.section:first-child{padding-top:64px}
.hero-grid,.split-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);gap:34px;align-items:center}
.hero-copy h1,.article-head h1{margin:0 0 20px;color:#143250;font-size:clamp(40px,4.6vw,52px);line-height:1.15;letter-spacing:-.02em}
.hero-copy p,.lead{font-size:18px;color:#5B6B7C;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;min-height:32px;padding:4px 12px;margin-bottom:18px;border-radius:999px;background:#EAF3FF;color:#154FC0;font-weight:800;font-size:14px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.primary-btn,.outline-btn{min-height:44px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;text-decoration:none;font-weight:800}
.primary-btn{background:#1C63E8;color:#FFFFFF}
.outline-btn{background:#FFFFFF;color:#143250;border:1px solid #C3D6F0}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:18px;background:#EAF3FF;aspect-ratio:16/9;min-height:168px}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-hero{min-height:280px}
.media-large{min-height:244px}
.media-card{min-height:176px}
.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#EAF3FF,#F8FBFF);border:1px solid #DCEAFB;border-radius:18px}
.summary-grid,.cards-3,.feature-grid,.service-grid,.topic-grid,.reviews,.faq-grid{display:grid;gap:22px}
.summary-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.cards-3,.feature-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.service-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.reviews{grid-template-columns:repeat(3,minmax(0,1fr))}
.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.card,.info-panel,.article-card,.step-card,.quote-card,.text-topic{background:#FFFFFF;border:1px solid #E1ECF7;border-radius:18px;box-shadow:0 14px 34px rgba(16,48,84,.08);padding:24px}
.card h2,.card h3,.info-panel h2,.info-panel h3,.article-card h2,.article-card h3,.step-card h2,.step-card h3,.text-topic h2,.text-topic h3{color:#143250;margin-top:0;line-height:1.35}
.card p,.info-panel p,.article-card p,.step-card p,.text-topic p{margin-bottom:0}
.text-link{display:inline-flex;margin-top:12px;color:#1C63E8;font-weight:800;text-decoration:none}
.text-link:hover{text-decoration:underline}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:28px}
.section-title h2{margin:0;color:#143250;font-size:clamp(28px,3.2vw,38px);line-height:1.2}
.section-title p{margin:0;max-width:560px;color:#7A8896}
.quick-scroll{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 12px;scrollbar-width:thin;overscroll-behavior-inline:contain}
.quick-scroll a{flex:0 0 auto;padding:12px 16px;border-radius:999px;background:#FFFFFF;border:1px solid #C3D6F0;color:#143250;text-decoration:none;font-weight:700}
.article-wrap{width:min(880px,calc(100% - 40px));margin:0 auto}
.article-head{padding:64px 0 24px}
.article-head p{margin:0;color:#5B6B7C;font-size:18px}
.article-content{padding:18px 0 72px}
.article-content h2{color:#143250;font-size:28px;line-height:1.3;margin:48px 0 16px}
.article-content h3{color:#143250;font-size:22px;line-height:1.4;margin:30px 0 12px}
.article-content p{margin:0 0 18px}
.article-content ul,.article-content ol{padding-left:1.35em;margin:0 0 22px}
.article-content li{margin:8px 0}
.toc,.notice{background:#EAF3FF;border:1px solid #DCEAFB;border-radius:18px;padding:22px 24px;margin:24px 0}
.toc strong,.notice strong{display:block;color:#143250;margin-bottom:8px}
.toc a{display:inline-flex;margin:5px 14px 5px 0}
.steps{display:grid;gap:16px;counter-reset:step}
.step-row{display:grid;grid-template-columns:52px minmax(0,1fr);gap:18px;align-items:start;background:#FFFFFF;border:1px solid #E1ECF7;border-radius:18px;padding:20px}
.step-row:before{counter-increment:step;content:counter(step);display:flex;width:44px;height:44px;align-items:center;justify-content:center;border-radius:50%;background:#1C63E8;color:#FFFFFF;font-weight:800}
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0;list-style:none}
.index-list a{display:block;padding:14px 16px;background:#FFFFFF;border:1px solid #DCEAFB;border-radius:14px;color:#143250;text-decoration:none;font-weight:700}
.topic-card{background:#FFFFFF;border:1px solid #E1ECF7;border-radius:18px;overflow:hidden;box-shadow:0 14px 34px rgba(16,48,84,.08)}
.topic-card .topic-body{padding:18px}
.topic-card h3{margin:0 0 8px;color:#143250}
.topic-card p{margin:0;color:#5B6B7C;font-size:15px;line-height:1.65}
.static-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.faq-item{background:#FFFFFF;border:1px solid #E1ECF7;border-radius:18px;padding:22px}
.faq-item h3{margin:0 0 10px;color:#143250;font-size:19px}
.faq-item p{margin:0}
.quote-card p{margin:0}
.quote-card strong{display:block;margin-top:12px;color:#143250}
.responsible-note{padding:24px;border-radius:18px;background:#143250;color:#FFFFFF}
.responsible-note h2{margin-top:0;color:#FFFFFF}
.responsible-note p{color:#EAF3FF}
.floating-tools{position:fixed;right:12px;top:50%;z-index:1500;transform:translateY(-50%);width:56px;display:grid;gap:8px}
.floating-tools a,.floating-tools button{min-height:56px;padding:8px 5px;display:flex;align-items:center;justify-content:center;text-align:center;border:1px solid #C3D6F0;border-radius:14px;background:#FFFFFF;color:#1C63E8;text-decoration:none;font-size:12px;line-height:1.35;box-shadow:0 8px 18px rgba(16,48,84,.09)}
.floating-tools .float-primary{background:#1C63E8;color:#FFFFFF;border-color:#1C63E8}
.site-footer{background:#0E2338;color:#D5E6F6}
.footer-grid{max-width:1220px;margin:0 auto;padding:56px 20px 36px;display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:34px}
.footer-grid>div{display:flex;flex-direction:column;align-items:flex-start}
.footer-grid strong{color:#FFFFFF;margin-bottom:14px}
.footer-grid a{color:#D5E6F6;text-decoration:none;margin:4px 0}
.footer-grid a:hover{text-decoration:underline}
.footer-brand p{max-width:300px}
.footer-fallback{background:#173957;color:#FFFFFF}
.footer-bottom{max-width:1220px;margin:0 auto;padding:20px;border-top:1px solid rgba(213,230,246,.15);font-size:14px;color:#BFD0E0}
.footer-bottom p{margin:5px 0}
.drawer-overlay,.mobile-drawer,.mobile-bottom-nav{display:none}
.blue-band{background:#EAF3FF}
.white-band{background:#FFFFFF}
.muted{color:#7A8896}
.badge-list{display:flex;flex-wrap:wrap;gap:10px;padding:0;list-style:none}
.badge-list li{padding:8px 12px;border-radius:999px;background:#EAF3FF;color:#154FC0;font-weight:700}
.rule-list{display:grid;gap:12px;padding:0;list-style:none}
.rule-list li{padding:16px 18px;background:#FFFFFF;border:1px solid #DCEAFB;border-radius:14px}
.notice-line{padding:14px 18px;border-left:4px solid #1C63E8;background:#F7FBFF;color:#5B6B7C}
@media (max-width:1060px){
  .nav-core a{padding:8px 9px;font-size:14px}.header-actions{gap:6px}.login-btn,.register-btn{min-width:76px;padding:0 14px}
  .summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.reviews{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .desktop-only{display:none!important}.mobile-only{display:flex}.site-header{backdrop-filter:blur(12px)}
  .header-inner{min-height:64px;padding:0 14px;display:grid;grid-template-columns:72px minmax(0,1fr) 72px;gap:8px}
  .menu-btn{width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:0;background:#FFFFFF;border-radius:12px;box-shadow:0 4px 14px rgba(16,48,84,.08)}
  .menu-btn span{display:block;width:20px;height:2px;background:#143250;border-radius:2px}
  .site-logo{justify-self:center;min-width:0;max-width:100%}.site-logo img{height:36px;max-width:154px}.mobile-login{justify-self:end;min-width:68px;height:40px;padding:0 14px}
  .site-main{padding-right:0;padding-bottom:76px}.page-shell{width:min(100% - 28px,1220px)}.article-wrap{width:min(100% - 28px,880px)}
  .section,.section:first-child{padding:52px 0}.section.compact{padding:36px 0}.hero-grid,.split-grid{grid-template-columns:1fr;gap:24px}
  .hero-copy h1,.article-head h1{font-size:clamp(30px,9vw,36px)}.hero-copy p,.article-head p,.lead{font-size:16px}
  .media-hero{min-height:200px}.media-large{min-height:220px}.cards-3,.feature-grid,.service-grid,.faq-grid,.compare-grid{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.static-images{grid-template-columns:1fr}.article-head{padding:46px 0 12px}.article-content{padding-bottom:52px}
  .article-content h2{font-size:25px;margin-top:38px}.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.summary-grid .card{padding:18px}
  .reviews{grid-template-columns:1fr}.section-title{display:block}.section-title p{margin-top:10px}.index-list{grid-template-columns:1fr}
  .drawer-overlay{display:block;position:fixed;inset:0;z-index:11000;background:rgba(14,35,56,.36);opacity:0;transition:opacity .18s ease}.drawer-overlay.is-visible{opacity:1}
  .mobile-drawer{display:flex;position:fixed;inset:0 auto 0 0;z-index:12000;width:min(86vw,328px);background:#FFFFFF;transform:translateX(-105%);transition:transform .22s ease;flex-direction:column;box-shadow:18px 0 38px rgba(14,35,56,.18)}
  .mobile-drawer.is-open{transform:translateX(0)}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px;border-bottom:1px solid #E6EFF8}
  .drawer-logo img{height:34px;max-width:150px}.drawer-close{width:40px;height:40px;border:0;border-radius:12px;background:#EAF3FF;color:#143250;font-size:28px;line-height:1}
  .drawer-scroll{overflow-y:auto;padding:16px 14px 28px}.drawer-group{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:20px}.drawer-group strong{grid-column:1/-1;color:#143250;margin:2px 0 6px}
  .drawer-group a{padding:10px 11px;background:#F7FBFF;border:1px solid #E1ECF7;border-radius:12px;text-decoration:none;color:#243447;font-size:14px}.drawer-lock{overflow:hidden}
  .mobile-bottom-nav{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:10000;grid-template-columns:repeat(4,1fr);background:#FFFFFF;border-top:1px solid #DCEAFB;box-shadow:0 -8px 22px rgba(16,48,84,.08);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left))}
  .mobile-bottom-nav a{min-height:44px;display:flex;align-items:center;justify-content:center;color:#143250;text-decoration:none;font-weight:700;font-size:14px}
  .footer-grid{grid-template-columns:1fr 1fr;padding:44px 16px 26px}.footer-brand{grid-column:1/-1}
}
@media (max-width:430px){
  .header-inner{grid-template-columns:64px minmax(0,1fr) 64px;padding:0 10px;gap:6px}.menu-btn{width:40px;height:40px}.mobile-login{min-width:60px;padding:0 11px;font-size:14px}
  .site-logo img{max-width:142px;height:34px}.logo-fallback{min-width:116px;padding:0 10px;font-size:14px}.summary-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .topic-card .topic-body{padding:14px}.topic-card p{font-size:14px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.primary-btn,.outline-btn{padding:0 14px}
}