:root{
--primary:#6F5AE8;--primary-soft:#9A8CF2;--deep:#242433;--bg:#F8F8FC;--bg-soft:#F0EEFA;--text:#30303A;--muted:#70707D;--accent:#F29A4A;--white:#fff;--line:#E2E0EC;--success:#3C8D72;--shadow:0 18px 50px rgba(36,36,51,.10);--radius:22px;--shell:1180px
}
*{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","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
button,input{font:inherit}
button{cursor:pointer}
code{padding:.1em .35em;border-radius:6px;background:var(--bg-soft);color:var(--deep)}
.shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}
.narrow{max-width:900px}
.skip-link{position:absolute;left:12px;top:-60px;z-index:1000;padding:10px 14px;background:var(--deep);color:white;border-radius:8px}
.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(226,224,236,.9)}
.header-row{min-height:78px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;min-width:max-content;color:var(--deep)}
.brand:hover{text-decoration:none}
.brand img{width:42px;height:42px;object-fit:contain}
.brand span{display:grid;line-height:1.18}
.brand strong{font-size:18px}
.brand small{margin-top:5px;color:var(--muted);font-size:11px}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.site-nav a{padding:9px 10px;border-radius:10px;color:var(--deep);font-size:14px;font-weight:650}
.site-nav a:hover{background:var(--bg-soft);text-decoration:none}
.search-button,.menu-button{border:1px solid var(--line);background:white;color:var(--deep);padding:9px 13px;border-radius:11px;font-weight:700}
.menu-button{display:none}
main{min-height:60vh}
.hero{position:relative;overflow:hidden;padding:68px 0 42px}
.hero:before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:rgba(154,140,242,.18);right:-160px;top:-260px}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy h1,.page-hero h1{margin:14px 0 20px;color:var(--deep);font-size:clamp(36px,5vw,64px);line-height:1.08;letter-spacing:-.035em}
.hero-copy>p,.page-hero>p{font-size:18px;color:var(--muted);max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em}
.eyebrow:before{content:"";width:24px;height:2px;background:currentColor;border-radius:2px}
.hero-actions,.section-actions,.link-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-actions{margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border-radius:12px;font-weight:800;border:1px solid transparent}
.button:hover{text-decoration:none;transform:translateY(-1px)}
.button.primary{background:var(--primary);color:white;box-shadow:0 10px 24px rgba(111,90,232,.2)}
.button.accent{background:var(--accent);color:#3e2814;box-shadow:0 10px 24px rgba(242,154,74,.2)}
.button.ghost{background:white;color:var(--deep);border-color:var(--line)}
.hero-facts{display:flex;flex-wrap:wrap;gap:9px 18px;padding:0;margin:26px 0 0;list-style:none;color:var(--muted);font-size:13px}
.hero-facts li:before{content:"✓";color:var(--success);font-weight:900;margin-right:6px}
.hero-media{margin:0;background:var(--bg-soft);border:1px solid var(--line);border-radius:28px;overflow:hidden;box-shadow:var(--shadow)}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media figcaption{padding:14px 18px;color:var(--muted);font-size:13px}
.page-hero{padding:72px 0 26px}
.page-hero h1{font-size:clamp(34px,4.4vw,56px)}
.breadcrumb{width:min(calc(100% - 40px),var(--shell));margin:22px auto 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:7px;padding:0;margin:0;list-style:none;color:var(--muted);font-size:13px}
.breadcrumb li:not(:last-child):after{content:"/";margin-left:7px;color:#aaa7b3}
.breadcrumb a{color:var(--muted)}
.section{padding:72px 0}
.section.tint{background:var(--bg-soft)}
.section-head{max-width:760px;margin-bottom:32px}
.section-head.compact{margin-bottom:24px}
.section-head h2,.split h2,.feature-banner h2,.callout h2,.plain-card h2,.download-intro h2{margin:10px 0 14px;color:var(--deep);font-size:clamp(28px,3.4vw,42px);line-height:1.14;letter-spacing:-.025em}
.section-head p,.split p,.feature-banner p,.callout p,.download-intro p{color:var(--muted)}
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.entry-card{overflow:hidden;background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 28px rgba(36,36,51,.05)}
.entry-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--bg-soft)}
.entry-card>div{padding:22px}
.entry-card h3{margin:0 0 9px;font-size:21px;color:var(--deep)}
.entry-card p{margin:0 0 16px;color:var(--muted)}
.entry-card a{font-weight:800}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.principle-list{display:grid;gap:12px}
.principle-list article{padding:18px 20px;background:white;border:1px solid var(--line);border-radius:16px}
.principle-list h3{margin:0 0 6px;color:var(--deep)}
.principle-list p{margin:0;color:var(--muted)}
.feature-banner{display:grid;grid-template-columns:.92fr 1.08fr;gap:32px;align-items:center;padding:26px;border-radius:28px;background:white;border:1px solid var(--line)}
.feature-banner.reverse{grid-template-columns:1.05fr .95fr}
.feature-banner img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;background:var(--bg-soft)}
.feature-banner h2{font-size:34px}
.steps{display:grid;gap:16px;list-style:none;padding:0;margin:0}
.steps li{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:20px 0;border-top:1px solid var(--line)}
.steps li:last-child{border-bottom:1px solid var(--line)}
.steps>li>span{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--primary);color:white;font-weight:900}
.steps h3{margin:0 0 6px;color:var(--deep);font-size:20px}
.steps p{margin:0;color:var(--muted)}
.section-actions{margin-top:26px}
.text-link{font-weight:800}
.dark-band{background:var(--deep);color:white}
.inverse h2,.inverse p{color:white}
.inverse p{opacity:.78}
.inverse img{width:100%;border-radius:24px;aspect-ratio:16/11;object-fit:cover;background:#343445}
.editorial-list{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;border-top:1px solid var(--line)}
.editorial-list article{padding:22px 0;border-bottom:1px solid var(--line)}
.editorial-meta{font-size:12px;font-weight:800;color:var(--primary);margin-bottom:8px}
.editorial-list h3{margin:0 0 8px;font-size:21px;line-height:1.35}
.editorial-list h3 a{color:var(--deep)}
.editorial-list p{margin:0;color:var(--muted)}
.faq-preview{display:grid;grid-template-columns:.7fr 1.3fr;gap:54px;align-items:start}
.faq-mini{display:grid;gap:10px}
.faq-mini details,.faq-page details{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq-mini summary,.faq-page summary{padding:17px 20px;cursor:pointer;color:var(--deep);font-weight:800}
.faq-mini p,.faq-page details div{padding:0 20px 18px;margin:0;color:var(--muted)}
.two-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.plain-card{background:white;border:1px solid var(--line);border-radius:24px;padding:22px}
.plain-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px;margin-bottom:18px}
.plain-card h2{font-size:28px}
.plain-card p{color:var(--muted)}
.callout{background:var(--bg-soft);border:1px solid var(--line);border-radius:28px;padding:42px;margin-bottom:72px}
.callout h2{max-width:760px}
.callout p{max-width:820px}
.inline-search label{display:block;font-weight:800;margin-bottom:8px}
.inline-search>div{display:grid;grid-template-columns:1fr auto;gap:8px;max-width:680px}
.inline-search input{min-width:0;border:1px solid var(--line);border-radius:12px;background:white;padding:12px 14px;color:var(--deep)}
.inline-search button{border:0;border-radius:12px;background:var(--primary);color:white;padding:0 20px;font-weight:800}
.inline-search.wide>div{max-width:none}
.media-split img{border-radius:26px;aspect-ratio:16/11;object-fit:cover;background:var(--bg-soft)}
.content-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.content-columns article{padding:22px;background:white;border:1px solid var(--line);border-radius:18px}
.content-columns h2,.content-columns h3{margin-top:0;color:var(--deep)}
.content-columns p{color:var(--muted)}
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.check-grid article{padding:18px 19px;border:1px solid var(--line);border-radius:16px;background:white}
.check-grid strong{display:block;margin-bottom:5px;color:var(--deep)}
.check-grid p{margin:0;color:var(--muted);font-size:14px}
.download-intro{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.download-intro img{border-radius:24px;aspect-ratio:4/3;object-fit:cover}
.check-list{display:grid;gap:10px;padding:0;margin:22px 0;list-style:none}
.check-list li{position:relative;padding-left:30px}
.check-list li:before{content:"✓";position:absolute;left:0;top:0;color:var(--success);font-weight:900}
.compat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.compat-grid article{padding:20px;border-radius:18px;background:white;border:1px solid var(--line)}
.compat-grid h3,.compat-grid h2{margin:0 0 8px;color:var(--deep)}
.compat-grid p{margin:0;color:var(--muted)}
.compat-grid.detailed{grid-template-columns:repeat(2,1fr)}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.timeline article{position:relative;padding:20px 22px;border-left:1px solid var(--line)}
.timeline article:last-child{border-right:1px solid var(--line)}
.timeline span{display:inline-grid;place-items:center;width:38px;height:38px;margin-bottom:16px;border-radius:10px;background:var(--bg-soft);color:var(--primary);font-weight:900}
.timeline h3{margin:0 0 7px;color:var(--deep)}
.timeline p{margin:0;color:var(--muted);font-size:14px}
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.scenario{padding:24px;background:white;border:1px solid var(--line);border-radius:20px}
.scenario.large{grid-column:1/-1;display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:center}
.scenario.large img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px}
.scenario span{color:var(--primary);font-weight:800;font-size:12px}
.scenario h2{color:var(--deep);margin:8px 0 10px}
.scenario p{color:var(--muted)}
.guide-index{display:grid;gap:22px}
.guide-index article{display:grid;grid-template-columns:240px 1fr;gap:26px;padding:20px;border:1px solid var(--line);border-radius:22px;background:white}
.guide-index img{width:100%;height:100%;max-height:190px;object-fit:cover;border-radius:15px;background:var(--bg-soft)}
.guide-index span{font-size:12px;color:var(--primary);font-weight:800}
.guide-index h2{margin:6px 0 8px;font-size:25px}
.guide-index h2 a{color:var(--deep)}
.guide-index p{color:var(--muted)}
.article{padding-top:54px;padding-bottom:72px}
.article-head{max-width:860px;margin:0 auto 30px;text-align:center}
.article-head h1{margin:12px 0 18px;font-size:clamp(36px,4.7vw,58px);line-height:1.12;color:var(--deep)}
.article-head p{font-size:18px;color:var(--muted)}
.article-cover{max-width:980px;margin:0 auto 34px}
.article-cover img{width:100%;max-height:520px;object-fit:cover;border-radius:26px;background:var(--bg-soft)}
.article-body{max-width:820px;margin:0 auto}
.article-body>section{padding:16px 0 24px}
.article-body h2{margin:0 0 10px;color:var(--deep);font-size:28px}
.article-body p{margin:0;color:#4d4d59;font-size:17px}
.article-note{margin-top:24px;padding:24px;border-radius:18px;background:var(--bg-soft);border:1px solid var(--line)}
.article-note h2{font-size:22px}
.number-list{display:grid;gap:12px;padding-left:22px}
.issue-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.issue-list article{padding:24px;border:1px solid var(--line);border-radius:20px;background:white}
.issue-list span{font-size:12px;color:var(--primary);font-weight:800}
.issue-list h2{margin:8px 0 10px;color:var(--deep);font-size:24px}
.issue-list p{color:var(--muted)}
.faq-page{display:grid;gap:12px;max-width:900px}
.faq-page summary{font-size:17px}
.faq-page details div{padding-top:4px}
.policy-sections{display:grid;gap:0}
.policy-sections section{padding:25px 0;border-top:1px solid var(--line)}
.policy-sections section:last-child{border-bottom:1px solid var(--line)}
.policy-sections h2{margin:0 0 9px;color:var(--deep)}
.policy-sections p{margin:0;max-width:880px;color:var(--muted)}
.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.safety-grid article{padding:24px;border-radius:20px;background:white;border:1px solid var(--line)}
.safety-grid h2{margin:0 0 10px;color:var(--deep);font-size:23px}
.safety-grid p{margin:0;color:var(--muted)}
.notice{padding:20px 22px;border-radius:16px;border:1px solid var(--line);background:white}
.notice strong{display:block;color:var(--deep);margin-bottom:4px}
.notice p{margin:0;color:var(--muted)}
.notice-warning{border-color:#e7c59f;background:#fff8ef}
.result-count{color:var(--muted);margin-top:0}
.result-list{display:grid;gap:14px}
.result-list article{padding:20px;border:1px solid var(--line);border-radius:17px;background:white}
.result-list h2{margin:0 0 7px;font-size:22px}
.result-list h2 a{color:var(--deep)}
.result-list p{margin:0 0 9px;color:var(--muted)}
.error-page{text-align:center;display:grid;justify-items:center}
.error-code{font-size:72px;font-weight:950;line-height:1;color:var(--primary-soft);letter-spacing:-.05em}
.site-footer{padding:52px 0 24px;background:var(--deep);color:white}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:30px}
.footer-grid h2{margin:0 0 12px;font-size:16px;color:white}
.footer-grid p{margin:0;color:rgba(255,255,255,.65)}
.footer-grid a{display:block;margin:7px 0;color:rgba(255,255,255,.76);font-size:14px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:36px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom p{margin:0;color:rgba(255,255,255,.5);font-size:13px}
.footer-bottom a{color:rgba(255,255,255,.72)}
.search-modal[hidden]{display:none!important}
.search-modal{position:fixed;inset:0;z-index:500;display:grid;place-items:start center;padding-top:10vh}
.search-backdrop{position:absolute;inset:0;background:rgba(24,24,32,.62)}
.search-panel{position:relative;z-index:1;width:min(calc(100% - 30px),680px);padding:30px;background:white;border-radius:24px;box-shadow:var(--shadow)}
.search-panel h2{margin:0 0 8px;color:var(--deep);font-size:30px}
.search-panel p{margin:0 0 18px;color:var(--muted)}
.search-panel label{font-weight:800}
.search-form-row{display:grid;grid-template-columns:1fr auto;gap:8px;margin-top:8px}
.search-form-row input{min-width:0;padding:12px 13px;border:1px solid var(--line);border-radius:10px}
.search-form-row button{border:0;border-radius:10px;background:var(--primary);color:white;padding:0 18px;font-weight:800}
.search-close{position:absolute;right:16px;top:14px;width:38px;height:38px;border:0;border-radius:50%;background:var(--bg-soft);color:var(--deep);font-size:24px}
.back-top{position:fixed;right:18px;bottom:18px;z-index:80;border:1px solid var(--line);border-radius:12px;background:white;color:var(--deep);box-shadow:var(--shadow);padding:10px 13px;font-weight:800}

@media(max-width:1024px){
.header-row{gap:12px}.site-nav a{padding:8px 7px;font-size:13px}.hero-grid{gap:34px}.compat-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:repeat(2,1fr);gap:12px}.timeline article,.timeline article:last-child{border:1px solid var(--line);border-radius:16px}.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:860px){
.menu-button{display:inline-flex;margin-left:auto}.site-nav{display:none;position:absolute;left:20px;right:20px;top:72px;padding:12px;background:white;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:10px}.search-button{font-size:0;padding:10px}.search-button:after{content:"搜索";font-size:13px}.hero-grid,.split,.download-intro{grid-template-columns:1fr}.hero-media{max-width:640px}.entry-grid,.content-columns,.check-grid{grid-template-columns:1fr 1fr}.faq-preview{grid-template-columns:1fr}.feature-banner,.feature-banner.reverse{grid-template-columns:1fr}.scenario.large{grid-template-columns:1fr}.guide-index article{grid-template-columns:180px 1fr}
}
@media(max-width:600px){
.shell{width:min(calc(100% - 28px),var(--shell))}.header-row{min-height:68px}.brand small{display:none}.brand img{width:36px;height:36px}.hero{padding:44px 0 28px}.hero-copy h1,.page-hero h1{font-size:36px}.hero-copy>p,.page-hero>p{font-size:16px}.hero-actions{align-items:stretch}.hero-actions .button{width:100%}.section{padding:52px 0}.section-head h2,.split h2,.feature-banner h2,.callout h2,.plain-card h2,.download-intro h2{font-size:29px}.entry-grid,.content-columns,.check-grid,.two-cards,.compat-grid,.compat-grid.detailed,.scenario-grid,.issue-list,.safety-grid{grid-template-columns:1fr}.editorial-list{grid-template-columns:1fr}.steps li{grid-template-columns:42px 1fr;gap:12px}.steps>li>span{width:38px;height:38px}.timeline{grid-template-columns:1fr}.scenario.large{grid-column:auto}.guide-index article{grid-template-columns:1fr}.guide-index img{max-height:240px}.article{padding-top:38px}.article-head{text-align:left}.article-head h1{font-size:37px}.callout{border-radius:0;margin-left:-14px;margin-right:-14px;margin-bottom:52px}.inline-search>div,.search-form-row{grid-template-columns:1fr}.inline-search button,.search-form-row button{min-height:44px}.footer-grid{grid-template-columns:1fr}.footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(max-width:375px){
.shell{width:min(calc(100% - 22px),var(--shell))}.brand strong{font-size:16px}.menu-button{padding:8px 10px}.search-button{padding:8px}.hero-copy h1,.page-hero h1{font-size:32px}.hero-facts{display:grid}
}
@media(prefers-reduced-motion:reduce){
html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}
}