/* 91浏览器：内容型官网视觉 */
:root{
    --primary:#6F5AE8;
    --primary-soft:#9A8CF2;
    --dark:#242433;
    --bg:#F8F8FC;
    --bg-soft:#F0EEFA;
    --text:#30303A;
    --muted:#70707D;
    --accent:#F29A4A;
    --white:#FFFFFF;
    --line:#E3E0EF;
    --radius:22px;
    --shadow:0 18px 50px rgba(36,36,51,.08);
    --shell:min(1180px, calc(100% - 40px));
}
*{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;text-rendering:optimizeLegibility}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.shell{width:var(--shell);margin-inline:auto}
.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:var(--dark);color:#fff;padding:10px 16px;border-radius:10px}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(248,248,252,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(227,224,239,.86)}
.header-inner{width:var(--shell);margin:auto;min-height:78px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}.brand img{border-radius:12px}.brand span{display:flex;flex-direction:column;line-height:1.18}.brand strong{font-size:1.05rem}.brand small{margin-top:5px;color:var(--muted);font-size:.76rem}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.main-nav a{padding:10px 12px;border-radius:10px;font-size:.93rem;color:#51515e}.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--bg-soft);color:var(--primary)}
.search-open,.menu-toggle{border:0;background:var(--dark);color:#fff;border-radius:12px;padding:10px 14px}.menu-toggle{display:none}
.eyebrow{display:inline-block;color:var(--primary);font-weight:700;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
h1,h2,h3{line-height:1.25;margin:0;color:var(--dark);text-wrap:balance}h1{font-size:clamp(2.35rem,6vw,5.4rem);letter-spacing:-.045em}h2{font-size:clamp(1.75rem,3.4vw,3rem);letter-spacing:-.025em}h3{font-size:1.2rem}p{margin:0 0 1em}.lead{font-size:1.18rem;color:#565663}
.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center;padding:84px 0 72px}.hero__copy>p{font-size:1.13rem;color:#5f5f6c;max-width:760px;margin-top:24px}.hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 18px;border-radius:13px;font-weight:700;border:1px solid transparent;transition:.2s ease}.button:hover{transform:translateY(-2px)}.button--primary{background:var(--primary);color:#fff;box-shadow:0 12px 24px rgba(111,90,232,.2)}.button--accent{background:var(--accent);color:#2d241b}.button--ghost{border-color:var(--line);background:#fff;color:var(--dark)}
.hero__media{position:relative}.hero__media:before{content:"";position:absolute;inset:12% 8% -3% -4%;background:var(--bg-soft);border-radius:40px;z-index:-1;transform:rotate(-4deg)}.hero__media img{border-radius:34px;box-shadow:var(--shadow);aspect-ratio:1.05/1;object-fit:cover}
.hero-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:34px 0 0}.hero-facts div{border-left:3px solid var(--primary-soft);padding-left:14px}.hero-facts dt{font-size:.8rem;color:var(--muted);margin-bottom:3px}.hero-facts dd{margin:0;font-weight:600;font-size:.94rem}
.section{padding:84px 0}.section--tint{background:var(--bg-soft)}.section--dark{background:var(--dark);color:#d8d8e2}.section--dark h2{color:#fff}.section--dark .eyebrow{color:#c4bafd}.section-head{max-width:780px;margin-bottom:34px}.section-head p{color:var(--muted);margin-top:14px}.section-head--row{max-width:none;display:flex;align-items:end;justify-content:space-between;gap:20px}.section-action{margin-top:30px}
.entrance-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.entrance-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;min-height:260px;display:flex;flex-direction:column}.entrance-card h3{font-size:1.45rem;margin-bottom:12px}.entrance-card p{color:var(--muted)}.entrance-card .text-link{margin-top:auto}
.text-link{color:var(--primary);font-weight:700;text-decoration:underline;text-decoration-color:rgba(111,90,232,.3);text-underline-offset:4px}.text-link:hover{text-decoration-color:var(--primary)}
.split-feature{display:grid;grid-template-columns:1fr .85fr;gap:72px;align-items:center}.split-feature p{font-size:1.05rem;color:#565663;margin-top:18px}.split-feature img{border-radius:30px;aspect-ratio:1.2/1;object-fit:cover;box-shadow:var(--shadow)}
.feature-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.feature-row{display:grid;grid-template-columns:170px 1fr;gap:28px;align-items:center;background:#fff;padding:22px}.feature-row img{width:170px;height:112px;object-fit:cover;border-radius:16px}.feature-row p{margin:8px 0 0;color:var(--muted)}.feature-list--detail .feature-row{grid-template-columns:260px 1fr;padding:28px}.feature-list--detail .feature-row img{width:260px;height:160px}
.editorial-band{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start}.editorial-band__content p{font-size:1.08rem}.link-pair{display:grid;gap:10px;margin-top:24px}.link-pair a{color:#fff;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.14)}.link-pair a:after{content:" →";color:var(--accent)}
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.article-grid--three{grid-template-columns:repeat(3,1fr)}.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.article-card__image img{width:100%;height:230px;object-fit:cover}.article-card__body{padding:24px}.article-card h3{font-size:1.35rem;margin:10px 0}.article-card p{color:var(--muted)}.meta-line{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:.82rem}.meta-line span{color:var(--primary);font-weight:700}
.topic-grid{display:grid;gap:18px}.topic-card{display:grid;grid-template-columns:340px 1fr;gap:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}.topic-card img{width:340px;height:220px;object-fit:cover;border-radius:16px}.topic-card h3{font-size:1.55rem;margin-bottom:10px}.topic-card p{color:var(--muted)}
.step-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.step-list li{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}.step-list li>span{width:46px;height:46px;display:grid;place-items:center;border-radius:50%;background:var(--bg-soft);color:var(--primary);font-weight:800;flex:0 0 auto}.step-list h3,.step-list h2{font-size:1.25rem}.step-list p{color:var(--muted);margin:7px 0 0}.step-list--large{grid-template-columns:1fr}.step-list--large li{padding:30px}.step-list--large li>span{width:56px;height:56px}
.faq-list{display:grid;border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:0}.faq-list summary{list-style:none;cursor:pointer;padding:20px 0;font-weight:700;color:var(--dark);position:relative;padding-right:44px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:4px;top:14px;font-size:1.6rem;color:var(--primary)}.faq-list details[open] summary:after{content:"−"}.faq-list p{color:var(--muted);max-width:860px;padding:0 0 20px;margin:0}.faq-list--large summary{font-size:1.08rem;padding-block:24px}
.notice-panel{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:32px;padding:42px}.notice-panel p{color:var(--muted);margin-top:12px}.notice-links{display:grid;gap:10px}.notice-links a{padding:12px 14px;border-radius:12px;background:var(--bg-soft);color:var(--primary);font-weight:700}
.site-footer{background:#1f1f2b;color:#c7c7d0;margin-top:84px}.footer-grid{width:var(--shell);margin:auto;padding:64px 0 40px;display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:42px}.footer-grid h2{color:#fff;font-size:1rem;margin-bottom:14px}.footer-grid section{display:flex;flex-direction:column;gap:9px}.footer-grid p{color:#aaaab5}.footer-grid a:hover{color:#fff}.footer-brand{font-size:1.35rem;font-weight:800;color:#fff}.footer-bottom{width:var(--shell);margin:auto;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:20px;align-items:center}.footer-bottom p{margin:0;font-size:.83rem}.back-top{background:transparent;border:1px solid rgba(255,255,255,.2);color:#fff;padding:8px 12px;border-radius:10px;white-space:nowrap}
.breadcrumbs{width:var(--shell);margin:24px auto 0}.breadcrumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:.85rem}.breadcrumbs li+li:before{content:"/";margin-right:8px;color:#aaa}.breadcrumbs a:hover{color:var(--primary)}
.page-hero{padding:64px 0 44px}.page-hero h1{font-size:clamp(2.2rem,5vw,4.5rem);max-width:980px}.page-hero>p,.page-hero>div>p{font-size:1.08rem;color:var(--muted);max-width:850px;margin-top:18px}.page-hero--media{display:grid;grid-template-columns:1.25fr .75fr;gap:54px;align-items:center}.page-hero--media>img{border-radius:28px;aspect-ratio:1.2/1;object-fit:cover;box-shadow:var(--shadow)}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:70px;align-items:start}.prose{font-size:1.04rem}.prose--wide{max-width:900px}.prose h2{font-size:1.75rem;margin:48px 0 16px}.prose h2:first-child{margin-top:0}.prose h3{margin:24px 0 10px}.prose p,.prose li{color:#535360}.prose a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}.prose ol,.prose ul{padding-left:1.3em}.prose li{margin-bottom:10px}.side-panel{position:sticky;top:104px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:12px}.side-panel h2{font-size:1.2rem;margin-bottom:4px}.side-panel a{padding:10px 0;border-top:1px solid var(--line);font-weight:600}.side-panel a:hover{color:var(--primary)}
.numbered-cards,.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.numbered-cards section,.check-grid section{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.numbered-cards strong,.check-grid span{color:var(--primary);font-size:.82rem}.numbered-cards h3,.check-grid h2,.check-grid h3{font-size:1.15rem;margin:8px 0}.numbered-cards p,.check-grid p{font-size:.94rem;margin:0}.check-grid{grid-template-columns:repeat(4,1fr)}
.callout-wide{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:center}.callout-wide p{color:var(--muted)}
.next-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.next-grid article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}.next-grid article p{color:var(--muted);margin-top:10px}
.article-page{max-width:920px;padding-top:64px}.article-header h1{font-size:clamp(2.3rem,5vw,4.6rem);margin:18px 0}.article-cover{width:100%;max-height:520px;object-fit:cover;border-radius:30px;margin-top:34px}.article-body{max-width:760px;margin:50px auto 0;font-size:1.08rem}.article-body section{margin-bottom:50px}.article-body h2{font-size:1.75rem;margin-bottom:16px}.article-body p{color:#50505d}.article-summary{background:var(--bg-soft);border-radius:var(--radius);padding:28px}
.inline-search{display:flex;gap:8px}.inline-search input{min-width:240px;border:1px solid var(--line);border-radius:10px;padding:10px 12px}.inline-search button{border:0;border-radius:10px;background:var(--dark);color:#fff;padding:10px 14px}
.search-modal[hidden]{display:none !important}.search-modal{position:fixed;inset:0;z-index:300;display:grid;place-items:start center;padding-top:12vh}.search-modal__backdrop{position:absolute;inset:0;background:rgba(24,24,34,.62)}.search-panel{position:relative;z-index:1;width:min(680px,calc(100% - 32px));background:#fff;border-radius:26px;padding:32px;box-shadow:0 32px 90px rgba(0,0,0,.28)}.search-panel h2{font-size:1.7rem;margin-bottom:18px}.search-close{position:absolute;right:18px;top:14px;border:0;background:transparent;font-size:2rem;color:var(--muted)}.search-form label{display:block;font-size:.86rem;font-weight:700;margin-bottom:7px}.search-row{display:flex;gap:8px}.search-row input{flex:1;border:1px solid var(--line);border-radius:12px;padding:12px 14px;min-width:0}.search-form--page{max-width:760px;margin-top:28px}.search-results{min-height:320px}.result-count{color:var(--muted);margin-bottom:16px}.result-list{display:grid;gap:14px}.result-list article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}.result-list article>span{color:var(--primary);font-size:.8rem;font-weight:700}.result-list h2{font-size:1.25rem;margin:6px 0}.result-list p{color:var(--muted)}.empty-state{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px}.empty-state h2{font-size:1.4rem;margin-bottom:8px}.empty-state a{color:var(--primary);font-weight:700}
.error-page{padding:90px 0}.error-code{font-size:6rem;line-height:1;font-weight:900;color:var(--primary-soft);letter-spacing:-.06em}.error-page h1{font-size:3rem;margin:16px 0}.error-page>p{max-width:680px;color:var(--muted);font-size:1.05rem}.error-links{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 50px}
body.modal-open{overflow:hidden}
@media (max-width:1100px){.header-inner{gap:14px}.main-nav a{padding:9px 8px;font-size:.88rem}.hero{gap:40px}.topic-card{grid-template-columns:280px 1fr}.topic-card img{width:280px}.check-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){:root{--shell:min(100% - 30px,780px)}.menu-toggle{display:inline-flex;margin-left:auto}.main-nav{display:none;position:absolute;left:15px;right:15px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.is-open{display:flex}.main-nav a{padding:11px 12px}.search-open{padding-inline:12px}.hero,.split-feature,.editorial-band,.page-hero--media,.callout-wide,.notice-panel{grid-template-columns:1fr}.hero{padding-top:56px}.hero__media{max-width:620px}.entrance-grid,.article-grid--three,.next-grid{grid-template-columns:1fr 1fr}.topic-card{grid-template-columns:1fr}.topic-card img{width:100%;height:300px}.content-layout{grid-template-columns:1fr}.side-panel{position:static}.footer-grid{grid-template-columns:1fr 1fr}.page-hero--media>img{max-width:560px}.article-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){:root{--shell:calc(100% - 24px);--radius:18px}.header-inner{min-height:68px}.brand small{display:none}.brand img{width:38px;height:38px}.search-open{font-size:0;width:42px;height:42px;padding:0}.search-open:before{content:"⌕";font-size:1.2rem}.hero{grid-template-columns:1fr;padding:42px 0 54px}.hero h1{font-size:2.55rem}.hero__copy>p{font-size:1rem}.hero-facts,.entrance-grid,.article-grid,.article-grid--three,.step-list,.next-grid{grid-template-columns:1fr}.section{padding:62px 0}.section-head--row{align-items:start;flex-direction:column}.feature-row,.feature-list--detail .feature-row{grid-template-columns:1fr}.feature-row img,.feature-list--detail .feature-row img{width:100%;height:200px}.topic-card img{height:220px}.footer-grid{grid-template-columns:1fr}.footer-bottom{align-items:flex-start;flex-direction:column}.numbered-cards,.check-grid{grid-template-columns:1fr}.page-hero{padding-top:44px}.page-hero h1{font-size:2.45rem}.article-page{padding-top:44px}.article-header h1{font-size:2.45rem}.article-body{font-size:1rem}.inline-search{width:100%}.inline-search input{min-width:0;flex:1}.search-row{flex-direction:column}.search-row .button{width:100%}.notice-panel{padding:26px}.search-panel{padding:26px 20px}.search-modal{padding-top:8vh}}
@media (max-width:400px){.brand strong{font-size:.95rem}.header-inner{gap:8px}.menu-toggle{padding:9px 11px}.hero h1,.page-hero h1,.article-header h1{font-size:2.18rem}.button{width:100%}.hero__actions,.error-links{display:grid}.section{padding:54px 0}}