/* 91浏览器官网内容站基础样式 */
:root{
  --primary:#6F5AE8;--primary-2:#9A8CF2;--ink:#242433;--body:#30303A;--muted:#70707D;
  --bg:#F8F8FC;--soft:#F0EEFA;--accent:#F29A4A;--line:#DDD9EE;--white:#fff;
  --shadow:0 18px 60px rgba(36,36,51,.10);--shadow-sm:0 10px 30px rgba(36,36,51,.07);
  --radius:22px;--radius-sm:14px;--container:min(1180px,calc(100% - 40px));--article:780px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72;text-rendering:optimizeLegibility}body.modal-open{overflow:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{width:var(--container);margin-inline:auto}.narrow{max-width:760px}.narrow-wide{max-width:920px}.article-width{max-width:860px}.site-main{min-height:60vh}.skip-link{position:fixed;left:14px;top:-80px;z-index:9999;padding:10px 14px;background:var(--ink);color:#fff;border-radius:10px}.skip-link:focus{top:14px}.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}
.site-header{position:sticky;top:0;z-index:100;background:rgba(248,248,252,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(221,217,238,.82)}.header-shell{min-height:82px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:12px;min-width:max-content}.brand img{width:46px;height:46px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand strong{font-size:17px;color:var(--ink)}.brand small{font-size:11px;color:var(--muted);margin-top:5px}.site-nav{margin-left:auto;display:flex;align-items:center;gap:4px}.site-nav a{padding:10px 12px;border-radius:10px;color:#4b4b59;font-size:14px}.site-nav a:hover,.site-nav a[aria-current="page"]{background:var(--soft);color:var(--primary)}.search-trigger,.menu-toggle{border:0;background:transparent;color:var(--ink);cursor:pointer}.search-trigger{padding:10px 15px;border:1px solid var(--line);border-radius:999px;background:#fff}.search-trigger:hover{border-color:var(--primary);color:var(--primary)}.menu-toggle{display:none;padding:10px 12px;border:1px solid var(--line);border-radius:10px}
.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:1000;display:grid;place-items:start center;padding-top:min(18vh,150px)}.search-modal__backdrop{position:absolute;inset:0;background:rgba(36,36,51,.62);backdrop-filter:blur(6px)}.search-modal__dialog{position:relative;z-index:2;width:min(680px,calc(100% - 32px));background:#fff;border-radius:24px;padding:34px;box-shadow:0 35px 100px rgba(0,0,0,.22)}.search-modal__dialog h2{margin:4px 0 18px;font-size:30px;color:var(--ink)}.search-modal__close{position:absolute;right:18px;top:14px;border:0;background:transparent;font-size:32px;color:var(--muted);cursor:pointer}.search-form{display:flex;gap:10px}.search-form input{flex:1;min-width:0;border:1px solid var(--line);border-radius:12px;padding:13px 15px;outline:0;background:#fbfbfe}.search-form input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(111,90,232,.10)}.search-form.large{max-width:760px;margin-top:26px}.search-form.large input{padding:16px 17px}.microcopy{margin:12px 0 0;color:var(--muted);font-size:13px}
.hero-section{padding:72px 0 54px;background:linear-gradient(180deg,#f5f2ff 0%,var(--bg) 100%);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:60px;align-items:center}.hero-copy h1{font-size:clamp(42px,5.2vw,72px);line-height:1.08;letter-spacing:-.04em;margin:14px 0 22px;color:var(--ink);max-width:850px}.hero-lead{font-size:19px;color:#50505d;max-width:720px}.eyebrow{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase}.action-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border-radius:12px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.2s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#5e4bd4}.btn-accent{background:var(--accent);color:#342316}.btn-accent:hover{background:#eb8d39}.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}.btn-dark{background:var(--ink);color:#fff}.hero-notes{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-notes span{font-size:12px;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 10px}.hero-visual{margin:0;position:relative}.hero-visual img{width:100%;border-radius:34px;box-shadow:var(--shadow);background:var(--soft);aspect-ratio:1.18/1;object-fit:cover}.hero-visual figcaption{margin-top:12px;color:var(--muted);font-size:13px}
.section{padding:84px 0}.section-soft{background:var(--soft)}.section-dark{background:var(--ink);color:#ececf4}.section-accent{background:#f7d3ae}.section-final{padding-top:54px}.section-heading{max-width:760px;margin-bottom:34px}.section-heading.compact{margin-bottom:18px}.section-heading h2,.split-heading h2{font-size:clamp(30px,3.2vw,46px);line-height:1.18;letter-spacing:-.025em;margin:8px 0 12px;color:var(--ink)}.section-heading p,.split-heading p{color:var(--muted);font-size:17px}.section-heading.light h2{color:#fff}.section-heading.light p{color:#c8c8d5}.section-heading.light .eyebrow{color:#b9afff}.split-heading{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;align-items:start}.prose p{margin-top:0}.prose h2{color:var(--ink);font-size:30px;margin-top:36px}.section-intro{padding-top:64px}
.core-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.core-card{background:#fff;border:1px solid #e6e2f4;border-radius:22px;overflow:hidden;box-shadow:var(--shadow-sm)}.core-card img{width:100%;aspect-ratio:1.55/1;object-fit:cover;background:#ebe8fb}.core-card>div{padding:24px}.core-card h3{font-size:24px;margin:8px 0;color:var(--ink)}.core-card p{color:var(--muted)}.tag{display:inline-flex;font-size:12px;color:#5f50b6;background:#eeeafd;border-radius:999px;padding:5px 9px}.text-link{display:inline-flex;color:var(--primary);font-weight:700;font-size:14px;margin-top:8px}.text-link:hover{text-decoration:underline}
.decision-grid{display:grid;grid-template-columns:1fr .82fr;gap:70px;align-items:start}.decision-grid h2,.feature-band h2,.compact-split h2,.final-callout h2{font-size:clamp(30px,3vw,44px);line-height:1.2;color:var(--ink);margin:10px 0 14px}.number-steps{list-style:none;padding:0;margin:28px 0 0;counter-reset:step}.number-steps li{position:relative;padding:0 0 24px 54px;min-height:48px}.number-steps li:not(:last-child):before{content:"";position:absolute;left:20px;top:38px;bottom:4px;width:1px;background:var(--line)}.number-steps li:after{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;background:var(--soft);color:var(--primary);font-weight:800}.number-steps strong,.number-steps span{display:block}.number-steps span{color:var(--muted);margin-top:4px}.number-steps.compact li{padding-bottom:18px}.decision-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:18px;box-shadow:var(--shadow-sm)}.decision-panel img{border-radius:18px;aspect-ratio:1.45/1;object-fit:cover;background:var(--soft)}.decision-panel h3{font-size:25px;color:var(--ink);margin:20px 4px 8px}.decision-panel p,.decision-panel .text-link{margin-left:4px;margin-right:4px}
.article-list{display:grid;gap:1px;background:rgba(255,255,255,.10);border-radius:18px;overflow:hidden}.article-row{display:grid;grid-template-columns:170px 1fr;gap:28px;background:var(--ink);padding:25px 26px}.article-row h3{margin:0 0 5px;font-size:22px;color:#fff}.article-row h3 a:hover{text-decoration:underline}.article-row p{margin:0;color:#bdbdca}.article-row .text-link{color:#cfc8ff}.article-row__meta .eyebrow{color:#f5c394}
.feature-band{display:grid;grid-template-columns:1fr .95fr;gap:62px;align-items:center}.feature-band.reverse{grid-template-columns:.95fr 1fr}.feature-band.reverse figure{order:-1}.feature-band figure{margin:0}.feature-band figure img{width:100%;border-radius:28px;box-shadow:var(--shadow-sm);aspect-ratio:1.45/1;object-fit:cover;background:var(--soft)}.check-list{list-style:none;margin:22px 0;padding:0}.check-list li{position:relative;padding-left:28px;margin:10px 0;color:#555563}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:800}.topic-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic-strip article{border-top:2px solid var(--primary);padding-top:16px}.topic-strip img{border-radius:15px;aspect-ratio:1.55/1;object-fit:cover;background:var(--soft);margin-bottom:16px}.topic-strip h3{font-size:20px;line-height:1.35;margin:0 0 8px;color:var(--ink)}.topic-strip p{font-size:14px;color:var(--muted)}
.compact-split{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center}.compact-split img{border-radius:25px;background:#f0b87c;max-height:330px;object-fit:cover;justify-self:end}.faq-preview{display:grid;grid-template-columns:.72fr 1.28fr;gap:72px}.faq-preview h2{font-size:42px;line-height:1.2;color:var(--ink);margin:8px 0 12px}.mini-faq details,.faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden}.mini-faq summary,.faq-list summary{cursor:pointer;list-style:none;padding:18px 48px 18px 20px;font-weight:700;color:var(--ink);position:relative}.mini-faq summary::-webkit-details-marker,.faq-list summary::-webkit-details-marker{display:none}.mini-faq summary:after,.faq-list summary:after{content:"+";position:absolute;right:20px;top:14px;font-size:26px;color:var(--primary)}.mini-faq details[open] summary:after,.faq-list details[open] summary:after{content:"−"}.mini-faq details p{margin:0;padding:0 20px 20px;color:var(--muted)}.final-callout{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px 36px;box-shadow:var(--shadow-sm)}.final-callout img{border-radius:20px;aspect-ratio:1.35/1;object-fit:cover;background:var(--soft)}
.page-hero{padding:70px 0 58px;background:linear-gradient(180deg,#f3f0ff,transparent)}.page-hero--download{background:linear-gradient(180deg,#fff0e3,transparent)}.page-hero--mobile{background:linear-gradient(180deg,#efeefe,transparent)}.page-hero--safety{background:linear-gradient(180deg,#f0f4f0,transparent)}.page-hero--search{background:linear-gradient(180deg,#f3f0ff,#f8f8fc)}.page-hero h1,.article-hero h1{font-size:clamp(40px,5vw,64px);line-height:1.12;letter-spacing:-.035em;color:var(--ink);margin:12px 0 18px}.page-hero p{font-size:18px;color:#5c5c69;max-width:820px}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:28px}.breadcrumbs ol{list-style:none;padding:0;margin:0;display:flex;gap:8px;flex-wrap:wrap}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa7b4}.breadcrumbs a:hover{color:var(--primary)}
.content-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:46px;align-items:start}.prose-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px}.prose-card h2{font-size:28px;color:var(--ink);margin:34px 0 10px}.prose-card h2:first-child{margin-top:0}.prose-card p,.prose-card li{color:#555563}.prose-card li{margin:8px 0}.side-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;position:sticky;top:105px}.side-panel img{border-radius:14px;background:var(--soft);margin-bottom:18px}.side-panel h2{color:var(--ink);font-size:24px}.inline-search label{display:block;font-weight:700;margin-bottom:7px}.inline-search>div{display:flex}.inline-search input{min-width:0;flex:1;border:1px solid var(--line);border-right:0;border-radius:10px 0 0 10px;padding:11px}.inline-search button{border:0;background:var(--primary);color:#fff;border-radius:0 10px 10px 0;padding:0 14px;cursor:pointer}.info-band{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:34px;border-radius:22px;background:#fff;border:1px solid var(--line)}.info-band h2{margin:0 0 6px;color:var(--ink);font-size:29px}.info-band p{margin:0;color:var(--muted);max-width:760px}
.download-check{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px;align-items:center}.download-check figure{margin:0}.download-check img{border-radius:26px;box-shadow:var(--shadow-sm);background:var(--soft)}.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.compare-grid article{background:#fff;border:1px solid #dedaf0;border-radius:18px;padding:24px}.compare-grid h3{margin:0 0 8px;color:var(--ink);font-size:22px}.compare-grid p{color:var(--muted)}
.guide-layout{display:grid;grid-template-columns:230px 1fr;gap:52px;align-items:start}.guide-index{position:sticky;top:110px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.guide-index h2{font-size:18px;color:var(--ink);margin:0 0 10px}.guide-index a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 8px;border-radius:9px;font-size:14px;color:#555563}.guide-index a:hover{background:var(--soft);color:var(--primary)}.guide-index span{font-size:11px;background:var(--soft);padding:2px 7px;border-radius:999px}.guide-sections{display:grid;gap:56px}.card-grid.two{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.guide-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px}.guide-card h3{font-size:21px;line-height:1.35;color:var(--ink);margin:10px 0 7px}.guide-card p{color:var(--muted);font-size:14px}
.topic-list{display:grid;gap:58px}.topic-feature{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}.topic-feature.reverse figure{order:2}.topic-feature figure{margin:0}.topic-feature img{border-radius:25px;box-shadow:var(--shadow-sm);aspect-ratio:1.55/1;object-fit:cover;background:var(--soft)}.topic-feature h2{font-size:36px;line-height:1.2;color:var(--ink);margin:8px 0 12px}.topic-feature p{color:var(--muted)}.topic-intro{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:center;margin-bottom:56px}.topic-intro img{border-radius:24px;background:var(--soft)}.topic-intro h2{font-size:32px;color:var(--ink);margin-top:0}.topic-intro p{color:var(--muted)}
.article-hero{padding:58px 0 26px}.article-hero .article-intro{font-size:20px;color:#5e5e6c;max-width:800px}.article-section{padding-top:34px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:54px;align-items:start}.article-body{max-width:var(--article)}.article-body>section{margin-bottom:44px}.article-body h2{font-size:31px;line-height:1.25;color:var(--ink);margin:0 0 14px}.article-body p{font-size:17px;color:#4f4f5b;margin:0 0 16px}.article-body ul{padding-left:22px}.article-body li{margin:8px 0;color:#555563}.article-end{margin-top:60px;padding:30px;background:var(--soft);border-radius:20px}.article-end h2{font-size:28px}.sticky-card{position:sticky;top:108px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.sticky-card h2{font-size:22px;color:var(--ink);margin:8px 0 14px}.sticky-card>a{display:block;padding:13px 0;border-top:1px solid #ece9f4}.sticky-card strong,.sticky-card span{display:block}.sticky-card strong{color:var(--ink);font-size:14px}.sticky-card span{font-size:12px;color:var(--muted);margin-top:4px}.sticky-card>a:hover strong{color:var(--primary)}
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.matrix article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}.matrix article>span{display:inline-grid;width:36px;height:36px;place-items:center;border-radius:50%;background:var(--soft);color:var(--primary);font-weight:800}.matrix h2{font-size:21px;color:var(--ink)}.matrix p{font-size:14px;color:var(--muted)}.link-stack{display:grid;gap:9px}.link-stack a{color:var(--primary);font-weight:700}.link-stack a:before{content:"→";margin-right:8px}.mobile-story{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:start}.phone-note{position:sticky;top:110px}.phone-note img{border-radius:30px;background:var(--soft);box-shadow:var(--shadow-sm)}.timeline{border-left:1px solid var(--line);padding-left:34px}.timeline>div{position:relative;padding:0 0 34px}.timeline>div>span{position:absolute;left:-55px;top:0;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;background:var(--primary);color:#fff;font-weight:800}.timeline h2{font-size:28px;color:var(--ink);margin:0 0 8px}.timeline p{color:var(--muted)}
.faq-page{display:grid;grid-template-columns:1fr 340px;gap:48px;align-items:start}.faq-list details{border-radius:16px}.faq-list summary{font-size:17px;padding:20px 52px 20px 22px}.faq-list details>div{padding:0 22px 22px;color:#5b5b68}.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}.about-grid figure{margin:0;position:sticky;top:110px}.about-grid img{border-radius:24px;background:var(--soft)}.values-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.values-grid article{padding:26px;background:#fff;border:1px solid var(--line);border-radius:18px}.values-grid h2{font-size:22px;color:var(--ink);margin-top:0}.values-grid p{color:var(--muted)}.policy-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:58px}.policy-layout article h2{font-size:28px;color:var(--ink);margin:34px 0 8px}.policy-layout article h2:first-child{margin-top:0}.policy-layout article p{color:#555563}.policy-layout aside{display:flex;flex-direction:column;gap:10px}.policy-layout aside img{border-radius:22px;background:var(--soft);margin-bottom:8px}.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.safety-grid article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.safety-grid article:first-child{grid-row:span 2}.safety-grid img{border-radius:16px;background:var(--soft);margin-bottom:20px}.safety-grid h2{font-size:24px;color:var(--ink)}.safety-grid p{color:var(--muted)}
.search-results{max-width:900px}.result-head{margin-bottom:24px}.result-head h2{font-size:29px;color:var(--ink);margin-bottom:4px}.result-head p{color:var(--muted)}.result-list{display:grid;gap:12px}.result-list article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.result-list h3{font-size:21px;color:var(--ink);margin:8px 0 5px}.result-list p{color:var(--muted);margin:0}.empty-state{padding:40px;background:#fff;border:1px solid var(--line);border-radius:20px;text-align:center}.empty-state h2{color:var(--ink)}.error-page{padding:110px 0}.status-code{font-size:78px;font-weight:900;line-height:1;color:var(--primary)}.error-page h1{font-size:46px;color:var(--ink);margin:12px 0}.error-page p{font-size:18px;color:var(--muted)}.error-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.error-links a{color:var(--primary);font-weight:700}
.site-footer{background:#1f1f2d;color:#d7d7e1;margin-top:40px;padding-top:58px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px}.brand--footer strong{color:#fff}.brand--footer small{color:#aaaabb}.footer-about p{color:#aaaabb;max-width:390px}.footer-grid h2{font-size:15px;color:#fff;margin:5px 0 12px}.footer-grid>div>a{display:block;color:#aaaabb;font-size:13px;padding:5px 0}.footer-grid>div>a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #353546;margin-top:46px;padding:18px 0;font-size:12px;color:#888899}.footer-bottom p{margin:0}.footer-bottom a:hover{color:#fff}
@media (max-width:1080px){.site-nav a{padding:9px 8px}.hero-grid{gap:36px}.topic-strip{grid-template-columns:repeat(2,1fr)}.matrix{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}.article-layout{grid-template-columns:minmax(0,1fr) 280px}.core-grid{gap:14px}}
@media (max-width:900px){.header-shell{min-height:72px}.menu-toggle{display:block;margin-left:auto}.site-nav{display:none;position:absolute;left:20px;right:20px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:11px 13px}.search-trigger{padding:9px 11px}.hero-section{padding-top:46px}.hero-grid,.split-heading,.decision-grid,.feature-band,.feature-band.reverse,.compact-split,.faq-preview,.content-layout,.download-check,.topic-feature,.topic-feature.reverse,.topic-intro,.mobile-story,.about-grid,.policy-layout{grid-template-columns:1fr}.hero-grid{gap:32px}.hero-visual{max-width:720px}.split-heading{gap:16px}.core-grid{grid-template-columns:1fr}.decision-grid,.faq-preview{gap:38px}.article-row{grid-template-columns:130px 1fr}.feature-band,.feature-band.reverse{gap:30px}.feature-band.reverse figure,.topic-feature.reverse figure{order:initial}.compact-split img{justify-self:start;max-width:500px}.content-layout{gap:30px}.side-panel{position:static}.guide-layout{grid-template-columns:1fr}.guide-index{position:static;display:flex;flex-wrap:wrap;gap:6px}.guide-index h2{width:100%}.guide-index a{background:#fff;border:1px solid var(--line)}.article-layout{grid-template-columns:1fr}.article-body{max-width:none}.sticky-card{position:static}.phone-note,.about-grid figure{position:static;max-width:520px}.timeline{margin-left:18px}.policy-layout{gap:30px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}.footer-about{grid-column:1/-1}}
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