:root{
  --page:#F4F8FD;--paper:#FFFFFF;--soft:#EAF3FF;--line:#DCEAFB;--title:#143250;
  --text:#243447;--muted:#5B6B7C;--note:#7A8896;--blue:#1C63E8;--blue-deep:#154FC0;
  --border:#C3D6F0;--footer:#0E2338;--footer-text:#D5E6F6;--shadow:0 14px 34px rgba(16,48,84,.08)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--page);color:var(--text);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}
.site-logo{display:flex;align-items:center;min-width:146px;text-decoration:none}.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-placeholder{height:40px;min-width:146px;border-radius:10px;background:var(--soft);display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:800}
.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}.login-btn:hover{background:var(--blue-deep)}.register-btn:hover{border-color:var(--blue);color:var(--blue)}
.mobile-head{display:none}.menu-toggle,.drawer-close{border:0;background:var(--soft);color:var(--title);border-radius:12px;width:42px;height:42px;align-items:center;justify-content:center;font-size:22px;cursor:pointer}
.channel-bar{background:#fff;border-top:1px solid #edf3fa;border-bottom:1px solid #e8f0f8}.channel-inner{max-width:1220px;margin:0 auto;padding:0 20px;display:flex;gap:18px;align-items:center;overflow-x:auto;scrollbar-width:thin;white-space:nowrap}.channel-inner a{padding:13px 0;text-decoration:none;color:#5B6B7C;font-size:14px;font-weight:700}.channel-inner a:hover,.channel-inner a.is-current{color:#1C63E8}
.site-main{min-height:60vh}.content-shell{max-width:1220px;margin:0 auto;padding:0 20px 80px}.hero{padding:76px 0 54px;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:42px;align-items:center}.hero-copy{max-width:690px}.eyebrow{display:inline-flex;padding:7px 12px;border-radius:999px;background:var(--soft);color:var(--blue);font-weight:800;font-size:14px;margin-bottom:16px}.hero h1,.page-lead h1{font-size:clamp(40px,4.2vw,52px);line-height:1.12;margin:0 0 20px;color:var(--title);letter-spacing:-.02em}.hero p,.page-lead p{font-size:18px;line-height:1.85;margin:0 0 18px;color:var(--text)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.primary-cta,.secondary-cta{height:46px;padding:0 22px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-weight:800}.primary-cta{background:var(--blue);color:#fff}.secondary-cta{background:#fff;color:var(--title);border:1px solid var(--border)}
.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.hero-media{min-height:260px;max-height:300px}.media.feature-media{min-height:228px;max-height:256px}.media.card-media{min-height:168px;max-height:184px}.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:22px;text-align:center;color:#7890a8;background:linear-gradient(135deg,#edf5ff,#e6f0fc);font-weight:700}
.section{padding:64px 0}.section.compact{padding:46px 0}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:24px}.section-head h2,.reading h2{margin:0;color:var(--title);font-size:30px;line-height:1.25}.section-head p{margin:0;max-width:660px;color:var(--muted);line-height:1.75}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.info-card,.topic-card,.notice-card,.quote-card,.faq-item,.step-item,.link-panel{background:#fff;border:1px solid rgba(195,214,240,.7);border-radius:18px;box-shadow:var(--shadow)}.info-card,.notice-card,.quote-card,.step-item,.link-panel{padding:24px}.info-card h3,.topic-card h3,.notice-card h3,.step-item h3,.link-panel h3{margin:0 0 10px;color:var(--title);font-size:20px}.info-card p,.topic-card p,.notice-card p,.quote-card p,.step-item p,.link-panel p{margin:0;color:var(--muted);line-height:1.78}.topic-card{overflow:hidden}.topic-card .topic-body{padding:18px}.topic-card .text-link,.info-card .text-link,.link-panel .text-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800;text-decoration:none}.topic-card .text-link:hover,.info-card .text-link:hover,.link-panel .text-link:hover{text-decoration:underline}.topic-card.text-only{padding:24px;min-height:205px;display:flex;flex-direction:column;justify-content:space-between}.topic-card.text-only .text-link{margin-top:20px}
.quick-scroll{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 10px;scrollbar-width:thin}.quick-scroll a{flex:0 0 auto;padding:11px 16px;background:#fff;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--title);font-weight:700}.quick-scroll a:hover{border-color:var(--blue);color:var(--blue)}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.78fr);gap:32px;align-items:center}.split.reverse{grid-template-columns:minmax(300px,.78fr) minmax(0,1fr)}.split.reverse .split-media{order:-1}.split-copy h2{font-size:32px;line-height:1.28;color:var(--title);margin:0 0 18px}.split-copy p{font-size:17px;line-height:1.85;margin:0 0 16px}.reading{max-width:860px;margin:0 auto}.reading.wide{max-width:1000px}.reading p{font-size:17px;line-height:1.9;margin:0 0 20px}.reading ul,.reading ol{padding-left:22px;margin:18px 0 26px}.reading li{margin:10px 0;line-height:1.8}.reading h2{margin:42px 0 16px}.reading h3{font-size:22px;color:var(--title);margin:30px 0 12px}.lead-note{background:#fff;border-left:4px solid var(--blue);border-radius:14px;padding:20px 22px;margin:24px 0;color:var(--text);box-shadow:var(--shadow);line-height:1.8}.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.link-list a{background:#fff;border:1px solid var(--line);padding:14px 16px;border-radius:14px;text-decoration:none;color:var(--title);font-weight:700}.link-list a:hover{color:var(--blue);border-color:var(--blue)}
.page-lead{padding:70px 0 30px;max-width:880px}.breadcrumbs{display:flex;gap:8px;align-items:center;color:var(--note);font-size:14px;margin-bottom:16px}.breadcrumbs a{text-decoration:none;color:var(--blue)}.page-lead h1{font-size:clamp(36px,4vw,48px)}.mini-index{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.mini-index a{padding:9px 13px;background:#fff;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--title);font-weight:700}.mini-index a:hover{color:var(--blue);border-color:var(--blue)}
.steps{counter-reset:step;display:grid;gap:16px}.step-item{position:relative;padding-left:74px}.step-item:before{counter-increment:step;content:counter(step);position:absolute;left:24px;top:24px;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--soft);color:var(--blue);font-weight:900}.faq-list{display:grid;gap:16px}.faq-item{padding:22px 24px}.faq-item h3{margin:0 0 10px;color:var(--title);font-size:19px}.faq-item p{margin:0;line-height:1.8;color:var(--text)}.quote-card strong{display:block;color:var(--title);margin-bottom:8px}.notice-band{background:linear-gradient(135deg,#eaf3ff,#f8fbff);border:1px solid var(--line);border-radius:18px;padding:24px}.notice-band p{margin:0;line-height:1.8}.meta-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 28px}.meta-row span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 12px;color:var(--muted);font-size:14px}
.site-footer{background:#0E2338;color:#D5E6F6}.footer-inner{max-width:1220px;margin:0 auto;padding:54px 20px 24px}.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:36px}.footer-brand p{line-height:1.8;color:#bcd0e3;max-width:300px}.footer-logo{display:inline-flex;margin-bottom:14px}.footer-logo img{height:40px;max-width:168px;object-fit:contain}.footer-logo .logo-placeholder{background:rgba(255,255,255,.08);color:#fff}.footer-col h3{color:#fff;font-size:16px;margin:0 0 14px}.footer-col a{display:block;color:#D5E6F6;text-decoration:none;margin:9px 0;font-size:14px}.footer-col a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(213,230,246,.15);margin-top:34px;padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:#a9bfd3;font-size:13px;line-height:1.7}
.right-float{position:fixed;right:14px;top:36%;z-index:1200;display:flex;flex-direction:column;gap:8px}.right-float a{width:92px;padding:11px 8px;text-align:center;background:#fff;color:var(--blue);border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 20px rgba(16,48,84,.10);text-decoration:none;font-size:13px;font-weight:800}.right-float a.primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.mobile-bottom{display:none}.drawer-overlay{position:fixed;inset:0;background:rgba(9,27,45,.42);z-index:10020;opacity:0;visibility:hidden;transition:.2s}.mobile-drawer{position:fixed;left:0;top:0;bottom:0;width:min(86vw,328px);background:#fff;z-index:10030;transform:translateX(-103%);transition:.24s ease;overflow-y:auto;padding:18px 18px 34px;box-shadow:12px 0 30px rgba(14,35,56,.16)}.drawer-open .drawer-overlay{opacity:1;visibility:visible}.drawer-open .mobile-drawer{transform:translateX(0)}.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}.drawer-logo img{height:36px;max-width:150px;object-fit:contain}.drawer-group{margin:20px 0}.drawer-group h3{font-size:13px;color:var(--note);margin:0 0 8px;letter-spacing:.08em}.drawer-group a{display:block;padding:11px 10px;border-radius:10px;text-decoration:none;color:var(--title);font-weight:700}.drawer-group a:hover,.drawer-group a.is-current{background:var(--soft);color:var(--blue)}
@media(max-width:1100px){.nav-core a{padding:8px 8px;font-size:14px}.header-actions .login-btn,.header-actions .register-btn{min-width:76px;padding:0 14px}.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.right-float{display:none}}
@media(max-width:1020px){.desktop-head,.channel-bar{display:none}.mobile-head{display:grid;grid-template-columns:48px minmax(0,1fr) 76px;align-items:center;min-height:64px;padding:0 14px;gap:10px}.mobile-head .menu-toggle{display:inline-flex}.mobile-head .site-logo{min-width:0;justify-content:center}.mobile-head .site-logo img{height:34px;max-width:142px}.mobile-head .logo-placeholder{height:34px;min-width:118px;font-size:14px}.mobile-head .login-btn{height:40px;min-width:72px;padding:0 12px}.content-shell{padding:0 16px 94px}.hero{grid-template-columns:1fr;padding:52px 0 38px;gap:26px}.hero h1,.page-lead h1{font-size:clamp(28px,8vw,36px)}.hero p,.page-lead p{font-size:16px}.media.hero-media{min-height:190px;max-height:220px}.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2,.split,.split.reverse{grid-template-columns:1fr}.split.reverse .split-media{order:0}.section{padding:48px 0}.section.compact{padding:36px 0}.section-head{align-items:flex-start;flex-direction:column}.section-head h2,.reading h2,.split-copy h2{font-size:26px}.page-lead{padding:48px 0 24px}.link-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(16,48,84,.08);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{padding:12px 6px;text-align:center;text-decoration:none;color:var(--muted);font-weight:800;font-size:13px}.mobile-bottom a.is-current{color:var(--blue)}body.drawer-open{overflow:hidden}.js .mobile-drawer{display:block}}
@media(max-width:560px){.grid-3{grid-template-columns:1fr}.mobile-head{grid-template-columns:44px minmax(0,1fr) 70px;padding:0 10px;gap:8px}.mobile-head .site-logo img{height:31px;max-width:126px}.mobile-head .login-btn{height:38px;min-width:66px;padding:0 10px;font-size:14px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-card .topic-body{padding:14px}.topic-card h3{font-size:17px}.topic-card p{font-size:14px}.info-card,.notice-card,.quote-card,.step-item,.link-panel{padding:20px}.step-item{padding-left:62px}.step-item:before{left:18px;top:20px}.footer-grid{grid-template-columns:1fr}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.hero-actions a{width:100%}.media.feature-media{min-height:200px}.section-head h2,.reading h2,.split-copy h2{font-size:24px}}
@media(max-width:390px){.mobile-head{grid-template-columns:42px minmax(0,1fr) 66px;padding:0 8px;gap:6px}.mobile-head .site-logo img{max-width:116px}.mobile-head .login-btn{min-width:62px;padding:0 8px}.menu-toggle{width:40px;height:40px}.hero-actions{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:375px){.mobile-head .site-logo img{max-width:108px}.mobile-head .login-btn{font-size:13px}.topic-card p{font-size:13px}}
@media(min-width:1021px){.no-js .mobile-drawer{display:none}.content-shell{padding-right:88px}}
@media(max-width:1020px){.no-js .mobile-drawer{position:static;transform:none;width:100%;max-width:none;height:auto;box-shadow:none;border-bottom:1px solid var(--line);padding:16px}.no-js .drawer-overlay,.no-js .drawer-close{display:none}.no-js .mobile-drawer .drawer-group{display:inline-block;vertical-align:top;width:48%;padding-right:10px}.no-js .mobile-drawer .drawer-top{justify-content:flex-start}.no-js body{overflow:auto}}