:root{--bg:#fff;--sub:#F7FAFF;--pale:#EDF5FF;--soft:#F5F6F8;--ink:#172033;--text:#3E4859;--muted:#6F7A89;--blue:#1478F2;--deep:#075DC9;--border:rgba(20,120,242,.12);--gray:rgba(30,50,70,.08);--shadow:0 14px 38px rgba(21,67,118,.08);--bshadow:0 16px 42px rgba(20,120,242,.15);--grad:linear-gradient(135deg,#3A96FF 0%,#1478F2 55%,#0863D3 100%);--max:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%;height:auto}.content-wrap{width:min(calc(100% - 40px),var(--max));margin:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:9999;background:var(--blue);color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid var(--gray);backdrop-filter:blur(12px)}.nav-shell{max-width:1280px;margin:auto;padding:0 20px}.desktop-head{height:74px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand img{height:34px;width:auto}.brand-word{background:var(--blue);color:#fff;border-radius:11px;padding:5px 10px;font-size:20px;font-weight:800}.brand-tag{font-size:12px;color:var(--blue);background:var(--pale);border:1px solid var(--border);border-radius:999px;padding:4px 8px}.primary-nav{display:flex;justify-content:center;gap:3px;min-width:0}.primary-nav a,.nav-action{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 11px;border-radius:12px;font-size:14px;color:var(--muted);white-space:nowrap;border:0;background:transparent}.primary-nav a:hover,.nav-action:hover,.primary-nav a.is-active,.nav-action.is-active{background:var(--pale);color:var(--blue)}.nav-actions{display:flex;gap:3px}.mobile-head{display:none}
.site-main{min-height:60vh}.eyebrow{display:inline-block;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.12em}.section-block{padding:74px 0}.section-block.alt{background:var(--sub)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:28px}.section-head h2,.page-intro h1,.home-hero h1,.brand-manifesto h2{margin:.25em 0 0;color:var(--ink);line-height:1.15;letter-spacing:-.03em}.section-head h2{font-size:clamp(28px,3vw,42px)}.section-head>p{max-width:600px;margin:0;color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:750;margin-top:16px}.primary-btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 20px;border-radius:13px;background:var(--grad);color:#fff;font-weight:800;box-shadow:var(--bshadow);white-space:nowrap}.action-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:22px}
.page-intro{padding:70px 0 42px;background:linear-gradient(180deg,var(--pale),#fff)}.intro-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:48px;align-items:end}.page-intro h1{font-size:clamp(42px,7vw,76px)}.page-intro p{font-size:18px;max-width:780px}.intro-note{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.intro-note p{font-size:15px;color:var(--muted);margin:8px 0 0}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.info-card{background:#fff;border:1px solid var(--gray);border-radius:16px;padding:24px;box-shadow:var(--shadow)}.info-card h3{color:var(--ink);font-size:22px;margin:12px 0 8px}.info-card p{margin:0;color:var(--muted)}.mini-tag{display:inline-block;border-radius:999px;padding:5px 10px;background:var(--pale);color:var(--blue);font-size:12px;font-weight:750}.prose-stack{display:grid}.prose-item{display:grid;grid-template-columns:64px minmax(0,1fr);gap:22px;padding:30px 0;border-bottom:1px solid var(--gray)}.prose-item:first-child{border-top:1px solid var(--gray)}.step-no{color:var(--blue);font-weight:800;font-size:13px}.prose-item h2{margin:0 0 8px;color:var(--ink);font-size:25px}.prose-item p{margin:0;max-width:960px;font-size:17px}
.home-hero{padding:42px 0 30px;background:linear-gradient(180deg,#fff,var(--sub))}.hero-grid{display:grid;grid-template-columns:.95fr 1.25fr .8fr;gap:18px}.hero-copy{padding:22px 12px 22px 0}.home-hero h1{font-size:clamp(38px,5vw,64px)}.hero-banner{min-height:500px;border-radius:20px;overflow:hidden;background:var(--pale);border:1px solid var(--border)}.hero-banner img{width:100%;height:100%;object-fit:cover}.banner-fallback{min-height:500px;height:100%;padding:40px;display:flex;flex-direction:column;justify-content:space-between;background:radial-gradient(circle at 70% 20%,rgba(255,255,255,.9),transparent 30%),linear-gradient(145deg,#ddecff,#f8fbff 58%,#cfe5ff)}.banner-fallback strong{font-size:clamp(34px,4vw,54px);line-height:1.18;color:var(--ink)}.banner-fallback span,.banner-fallback small{color:var(--blue);font-weight:800}.hero-side{padding:22px;background:#fff;border:1px solid var(--gray);border-radius:20px;box-shadow:var(--shadow)}.hero-side a{display:block;padding:15px 0;border-bottom:1px solid var(--gray)}.hero-side strong,.hero-side span{display:block}.hero-side strong{color:var(--ink)}.hero-side span{font-size:13px;color:var(--muted)}.channel-strip{border-block:1px solid var(--gray)}.strip-scroll{display:flex;gap:28px;justify-content:space-between;overflow-x:auto;scrollbar-width:none;padding-block:13px}.strip-scroll a{white-space:nowrap}.strip-scroll i{display:inline-block;width:7px;height:7px;background:var(--blue);border-radius:50%;margin-right:7px}
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.feature-grid article{grid-column:span 4;padding:24px;border:1px solid var(--gray);border-radius:16px;background:#fff}.feature-grid article.wide{grid-column:span 6;background:var(--pale);border-color:var(--border)}.feature-grid h3{color:var(--ink);margin-top:0}.feature-grid p{color:var(--muted);margin-bottom:0}.topic-feature{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;padding:36px;background:var(--pale);border:1px solid var(--border);border-radius:20px}.topic-feature h2{font-size:36px;line-height:1.2;color:var(--ink);margin:.2em 0}.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}.mini-grid article{padding:20px;border:1px solid var(--gray);border-radius:15px;background:#fff}.mini-grid h3{color:var(--ink);margin-top:0}.mini-grid p{color:var(--muted)}
.route-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.route-grid article{padding:24px;border:1px solid var(--gray);border-radius:16px;background:#fff;position:relative}.route-grid b{color:var(--blue)}.route-grid h3{color:var(--ink)}.route-grid small{display:block;color:#084A9C;border-top:1px dashed var(--border);padding-top:8px}.tag-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.tag-wall a{min-height:150px;padding:22px;border-radius:18px;background:#fff;border:1px solid var(--border);display:flex;flex-direction:column;justify-content:flex-end}.tag-wall strong{font-size:23px;color:var(--blue)}.tag-wall span{font-size:14px;color:var(--muted)}
.qa-list,.faq-page-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.qa-list details,.faq-page-list details{background:#fff;border:1px solid var(--gray);border-radius:14px;padding:0 20px}.qa-list summary,.faq-page-list summary{cursor:pointer;min-height:62px;display:flex;align-items:center;color:var(--ink);font-weight:800}.qa-list p,.faq-page-list p{color:var(--muted)}
.brand-manifesto{padding:82px 0;background:#0B1F38;color:#EAF3FF}.manifesto-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px}.brand-manifesto h2{font-size:clamp(36px,5vw,58px);color:#fff}.site-footer{background:#0B1F38;color:#EAF3FF;padding:60px 0 24px}.footer-inner{width:min(calc(100% - 40px),var(--max));margin:auto}.footer-brand{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12)}.footer-brandline{display:flex;align-items:center;gap:12px}.footer-brandline img{max-height:44px;max-width:120px}.footer-brandmark{background:#fff;color:var(--blue);font-weight:900;padding:7px 11px;border-radius:10px}.footer-brandline strong,.footer-brandline span{display:block}.footer-brandline span{font-size:11px;letter-spacing:.13em;color:#a9c6e8}.footer-brand p,.footer-note{color:#bed2e8}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:36px 0}.footer-links h2{font-size:14px}.footer-links a{display:block;color:#bed2e8;padding:4px 0;font-size:14px}.footer-note{padding:18px;border-radius:14px;background:rgba(255,255,255,.05);font-size:14px}.copyright{text-align:center;color:#8faecc;font-size:13px}
.overlay{position:fixed;inset:74px 0 0;background:rgba(7,36,71,.34);z-index:1090;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.channel-menu,.search-panel{position:fixed;left:0;right:0;top:74px;z-index:1100;background:#fff;box-shadow:0 22px 50px rgba(15,50,90,.16);visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-12px);transition:.22s;max-height:calc(100vh - 74px);overflow:auto}.channel-menu.is-open,.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.panel-inner,.search-inner{width:min(calc(100% - 40px),var(--max));margin:auto;padding:32px 0 40px}.panel-top{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.panel-top h2{margin:4px 0 20px;color:var(--ink)}.close-btn{min-width:64px;min-height:44px;border:1px solid var(--gray);background:var(--soft);border-radius:12px}.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}.channel-group h3{color:var(--blue);font-size:13px}.channel-group a{display:block;padding:9px 0;border-bottom:1px solid var(--gray)}.channel-group strong,.channel-group span{display:block}.channel-group span{font-size:13px;color:var(--muted)}.search-box input{width:100%;height:58px;border:1px solid var(--border);border-radius:14px;padding:0 18px;font-size:18px}.search-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:40px;margin-top:24px}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip-row button{border:1px solid var(--border);background:var(--pale);color:var(--blue);border-radius:999px;padding:7px 11px}.search-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.search-links a{padding:13px;border:1px solid var(--gray);border-radius:12px}.search-links a[hidden]{display:none}.search-links span{display:block;color:var(--muted);font-size:13px}.search-hint{color:var(--muted);font-size:13px}.panel-open{overflow:hidden}.mobile-bottom{display:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(20,120,242,.35);outline-offset:3px}
@media(max-width:1100px){.brand-tag{display:none}.primary-nav a,.nav-action{padding:0 7px;font-size:13px}.hero-grid{grid-template-columns:1fr 1.15fr}.hero-side{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.hero-side>a{border:1px solid var(--gray);border-radius:12px;padding:13px}.card-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){body{padding-bottom:70px}.content-wrap,.footer-inner,.panel-inner,.search-inner{width:min(calc(100% - 30px),var(--max))}.desktop-head{display:none}.mobile-head{height:64px;display:grid;grid-template-columns:52px 1fr 52px;align-items:center}.nav-shell{padding:0 15px}.mobile-brand{display:flex;justify-content:center}.mobile-brand img{max-height:32px;max-width:150px}.mobile-brand strong{color:var(--blue);font-size:20px}.icon-btn,.mobile-discover{min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--blue);font-weight:800}.menu-glyph,.menu-glyph:before,.menu-glyph:after{width:20px;height:2px;background:var(--ink);display:block;position:relative}.menu-glyph:before,.menu-glyph:after{content:"";position:absolute;left:0}.menu-glyph:before{top:-6px}.menu-glyph:after{top:6px}.overlay{top:64px}.channel-menu{top:0;left:auto;width:min(88vw,390px);height:100vh;max-height:none;transform:translateX(100%)}.channel-menu.is-open{transform:none}.search-panel{top:0;height:100vh;max-height:none;transform:translateY(-100%)}.search-panel.is-open{transform:none}.channel-grid,.search-layout{grid-template-columns:1fr}.search-links{grid-template-columns:1fr}.mobile-bottom{position:fixed;z-index:950;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--gray);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);font-size:11px}.mobile-bottom a span{font-size:17px;line-height:1}.mobile-bottom a.is-active{color:var(--blue);background:var(--pale)}.intro-grid,.manifesto-inner,.footer-brand{grid-template-columns:1fr}.page-intro{padding:50px 0 34px}.page-intro h1{font-size:48px}.card-grid{grid-template-columns:1fr 1fr}.hero-grid{grid-template-columns:1fr}.hero-banner{min-height:330px}.banner-fallback{min-height:330px}.hero-side{grid-template-columns:1fr 1fr}.feature-grid article,.feature-grid article.wide{grid-column:span 6}.topic-feature{grid-template-columns:1fr}.mini-grid,.route-grid{grid-template-columns:1fr 1fr}.tag-wall{grid-template-columns:1fr 1fr}.qa-list,.faq-page-list{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:82px}}
@media(max-width:560px){.page-intro h1{font-size:40px}.section-block{padding:48px 0}.section-head{display:block}.section-head>p{margin-top:10px}.card-grid,.mini-grid,.route-grid,.tag-wall{grid-template-columns:1fr}.prose-item{grid-template-columns:42px 1fr;gap:10px}.prose-item h2{font-size:22px}.hero-side{grid-template-columns:1fr}.feature-grid article,.feature-grid article.wide{grid-column:span 12}.topic-feature{padding:25px}.footer-links{grid-template-columns:1fr 1fr;gap:18px}.brand-manifesto{padding:60px 0}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}