:root{--bg:#F4F8FD;--card:#FFFFFF;--soft:#EAF3FF;--soft2:#DCEAFB;--title:#143250;--text:#243447;--muted:#5B6B7C;--muted2:#7A8896;--blue:#1C63E8;--blue2:#154FC0;--line:#C3D6F0;--footer:#0E2338;--footerText:#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(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:none}img,svg,video{max-width:100%}button,input,select,textarea{font:inherit}#top{position:absolute;top:0}
.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;flex:0 0 auto}.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-placeholder{height:40px;min-width:140px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:var(--soft);color:var(--title);font-weight:900;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;text-decoration:none}.nav-core a.is-current,.nav-core a:hover{background:#E4F0FF;color:#1C63E8}.header-actions{display:flex;gap:10px;flex:0 0 auto}.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}.menu-btn{display:none;border:0;background:transparent;width:42px;height:42px;padding:9px;flex:0 0 42px}.menu-btn span{display:block;height:2px;background:var(--title);margin:5px 0;border-radius:99px}.channel-bar{background:#fff;border-top:1px solid rgba(195,214,240,.55)}.channel-scroll{max-width:1220px;margin:0 auto;padding:9px 20px;display:flex;gap:19px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.channel-scroll a{color:#5B6B7C;font-size:14px;font-weight:700;flex:0 0 auto}.channel-scroll a:hover,.channel-scroll a.is-current{color:#1C63E8}.mobile-drawer,.drawer-overlay{display:none}
main{min-height:60vh}.container{width:min(1220px,calc(100% - 40px));margin:0 auto}.reading{width:min(860px,calc(100% - 40px));margin-left:auto;margin-right:auto}.section{padding:72px 0}.section.compact{padding:52px 0}.section-title{margin:0 0 12px;color:var(--title);font-size:clamp(28px,3vw,40px);line-height:1.2}.section-lead{margin:0 0 28px;color:var(--muted);font-size:17px}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--blue);font-weight:800;font-size:14px;letter-spacing:.04em;text-transform:uppercase}.page-hero{padding:80px 0 64px}.hero-grid,.split{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(340px,.92fr);gap:42px;align-items:center}.hero-copy h1,.page-head h1{margin:0 0 18px;color:var(--title);font-size:clamp(40px,5vw,52px);line-height:1.1;letter-spacing:-.02em}.page-head{padding:72px 0 34px}.page-head p,.hero-copy p{font-size:18px;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn-primary,.btn-outline{min-height:44px;padding:0 22px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:800}.btn-primary{background:var(--blue);color:#fff}.btn-outline{border:1px solid var(--line);background:#fff;color:var(--title)}.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:800;color:var(--blue)}.text-link::after{content:'→'}
.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{height:280px;aspect-ratio:auto}.media.story-media{height:242px;aspect-ratio:auto}.media.card-media{height:176px;aspect-ratio:auto}.media-placeholder{position:absolute;inset:0;display:grid;place-items:center;background:linear-gradient(135deg,#EAF3FF,#F8FBFF)}.media-placeholder::before{content:'';width:42%;height:42%;border-radius:18px;border:1px solid #C3D6F0;background:#fff;box-shadow:var(--shadow)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.card{background:#fff;border:1px solid rgba(195,214,240,.72);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.card h2,.card h3{color:var(--title);margin-top:0;line-height:1.35}.card p{color:var(--muted);margin-bottom:14px}.summary-card{padding:22px}.summary-card strong{display:block;color:var(--title);font-size:19px;margin-bottom:6px}.summary-card span{color:var(--muted);font-size:15px}.topic-card{padding:14px}.topic-card .topic-body{padding:14px 6px 4px}.topic-card h3{margin:0 0 8px}.topic-card p{font-size:14px;line-height:1.65;min-height:46px}.text-topic{display:flex;flex-direction:column;justify-content:center;min-height:270px;background:linear-gradient(145deg,#fff,#f1f6fd)}.text-topic .topic-mark{font-size:34px;font-weight:900;color:#b6cae5;letter-spacing:.08em}.quick-strip{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 12px;scrollbar-width:thin}.quick-strip a{flex:0 0 auto;padding:11px 16px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--title);font-weight:800}.notice{border-left:4px solid var(--blue);padding:18px 20px;background:var(--soft);border-radius:0 14px 14px 0;color:var(--text)}.plain-list{margin:0;padding-left:1.2em}.plain-list li{margin:8px 0}.step-list{counter-reset:steps;display:grid;gap:16px}.step{position:relative;padding:20px 22px 20px 70px;background:#fff;border:1px solid var(--line);border-radius:18px}.step::before{counter-increment:steps;content:counter(steps);position:absolute;left:20px;top:19px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:900}.link-list{display:grid;gap:10px}.link-list a{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid #E4EDF8;color:var(--title);font-weight:800}.link-list a::after{content:'→';color:var(--blue)}.qa-list{display:grid;gap:16px}.qa-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.qa-item h2,.qa-item h3{margin:0 0 10px;color:var(--title);font-size:19px}.qa-item p{margin:0;color:var(--muted)}.quote-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.quote{background:#fff;border-radius:18px;padding:20px;border:1px solid var(--line);color:var(--muted)}.meta-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.pill{background:var(--soft);color:var(--blue2);border-radius:999px;padding:6px 11px;font-size:13px;font-weight:800}.divider{height:1px;background:#DCEAFB;margin:28px 0}.article h2{color:var(--title);margin:32px 0 12px;font-size:28px;line-height:1.3}.article h3{color:var(--title);margin:24px 0 10px}.article p{font-size:17px;margin:0 0 18px}.article ul{font-size:17px}.dual-nav{display:grid;grid-template-columns:1fr 1fr;gap:22px}.route-card{background:#fff;border-radius:18px;border:1px solid var(--line);padding:24px}.route-card h2{margin-top:0;color:var(--title)}.timeline{position:relative;padding-left:28px}.timeline::before{content:'';position:absolute;left:9px;top:5px;bottom:5px;width:2px;background:#C3D6F0}.timeline-item{position:relative;padding:0 0 24px 20px}.timeline-item::before{content:'';position:absolute;left:-24px;top:9px;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px var(--soft)}.timeline-item h3{margin:0 0 6px;color:var(--title)}.timeline-item p{margin:0;color:var(--muted)}
.site-footer{background:#0E2338;color:#D5E6F6;margin-top:64px}.footer-grid{max-width:1220px;margin:0 auto;padding:58px 20px 34px;display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:34px}.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:320px}.footer-logo img{height:40px;width:auto;object-fit:contain}.footer-placeholder{background:#173550;color:#fff;border-color:#36556f}.footer-bottom{max-width:1220px;margin:0 auto;padding:18px 20px 26px;border-top:1px solid rgba(213,230,246,.15);display:flex;justify-content:space-between;gap:24px;font-size:13px}.footer-bottom p{margin:0}.floating-tools{position:fixed;right:14px;top:42%;z-index:3000;display:grid;gap:8px;width:92px}.floating-tools a{padding:9px 8px;text-align:center;border:1px solid var(--line);background:#fff;color:var(--blue);border-radius:12px;font-size:13px;font-weight:800;box-shadow:0 8px 20px rgba(16,48,84,.08)}.floating-tools a.float-primary{background:var(--blue);color:#fff}.mobile-bottom{display:none}
@media(min-width:1081px){main{padding-right:68px}}
@media(max-width:1080px){.channel-bar{display:none}.nav-core a{padding:8px 8px;font-size:14px}.header-actions .register-btn{display:none}.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}.floating-tools{display:none}}
@media(max-width:820px){.channel-bar{display:none}.nav-core{display:none}.menu-btn{display:block}.header-inner{min-height:64px;padding:0 14px;gap:10px;display:grid;grid-template-columns:42px 1fr 82px}.site-logo{justify-self:center;min-width:0}.site-logo img{height:36px;max-width:150px}.header-actions{justify-self:end}.header-actions .register-btn{display:none}.login-btn{height:40px;min-width:76px;padding:0 14px}.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;width:min(86vw,328px);background:#fff;z-index:12001;transform:translateX(-102%);transition:transform .2s ease;box-shadow:14px 0 40px rgba(16,48,84,.16);overflow-y:auto}.mobile-drawer.is-open{transform:translateX(0)}.drawer-overlay{position:fixed;inset:0;background:rgba(14,35,56,.38);z-index:12000;opacity:0;transition:opacity .18s ease}.drawer-overlay.is-open{opacity:1}.drawer-head{position:sticky;top:0;z-index:2;background:#fff;border-bottom:1px solid #E4EDF8;display:flex;align-items:center;justify-content:space-between;padding:14px 16px}.drawer-logo img{height:34px;width:auto;object-fit:contain}.drawer-close{border:0;background:var(--soft);width:38px;height:38px;border-radius:50%;font-size:26px;line-height:1;color:var(--title)}.drawer-body{padding:14px 18px 32px}.drawer-body section{padding:14px 0;border-bottom:1px solid #E4EDF8}.drawer-body h2{font-size:13px;letter-spacing:.08em;color:var(--muted2);margin:0 0 8px}.drawer-body a{display:block;padding:9px 0;color:var(--title);font-weight:700}.page-hero{padding:54px 0 42px}.hero-grid,.split{grid-template-columns:1fr;gap:28px}.hero-copy h1,.page-head h1{font-size:clamp(30px,9vw,36px)}.page-head{padding:48px 0 26px}.section{padding:52px 0}.section.compact{padding:42px 0}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.quote-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.dual-nav{grid-template-columns:1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8000;background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);padding:8px max(6px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left));box-shadow:0 -8px 26px rgba(16,48,84,.08)}.mobile-bottom a{text-align:center;color:var(--title);font-size:13px;font-weight:800;padding:6px 2px}.site-footer{padding-bottom:64px}.media.hero-media{height:210px}.media.story-media{height:228px}.hero-grid.is-media-first .hero-copy{order:2}.hero-grid.is-media-first .media-wrap{order:1}}
@media(max-width:560px){.container,.reading{width:min(100% - 28px,1220px)}.grid-2,.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card{padding:20px}.topic-card{padding:10px}.topic-card p{font-size:13px}.media.card-media{height:168px}.section-title{font-size:28px}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.hero-actions{gap:10px}.btn-primary,.btn-outline{min-height:40px;padding:0 18px}.site-logo img{max-width:138px}.logo-placeholder{min-width:116px;font-size:14px}}