:root{
  --primary:#6C4FF8;--primary-soft:#9B8AFB;--ink:#252331;--deep:#1E1B2E;--muted:#716E7E;--bg:#F7F6FB;--bg-soft:#EEEAF8;--accent:#F06A8A;--line:#DDD8EB;--white:#fff;--shadow:0 18px 55px rgba(30,27,46,.09);--radius:22px;--shell:min(1180px,calc(100% - 40px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.shell{width:var(--shell);margin-inline:auto}.page-main{min-height:70vh;padding-bottom:72px}.skip-link{position:fixed;left:12px;top:12px;z-index:9999;background:var(--deep);color:white;padding:10px 14px;border-radius:10px;transform:translateY(-160%)}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(221,216,235,.75)}.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:42px;height:42px;border-radius:14px;background:var(--primary);color:white;display:grid;place-items:center;font-weight:800;box-shadow:0 10px 26px rgba(108,79,248,.22)}.brand-text{display:flex;flex-direction:column;line-height:1.25}.brand-text strong{font-size:18px;color:var(--deep)}.brand-text small{font-size:12px;color:var(--muted);margin-top:4px}.primary-nav{display:flex;align-items:center;gap:6px}.primary-nav a{padding:10px 13px;border-radius:12px;color:var(--muted);font-size:14px}.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--bg-soft);color:var(--deep)}.nav-toggle{display:none;border:0;background:var(--deep);color:#fff;border-radius:12px;padding:9px 13px}.hero{display:grid;grid-template-columns:1.18fr 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p{margin:0;color:var(--muted);max-width:760px}.meta-label{font-size:12px;font-weight:800;letter-spacing:.04em;color:var(--accent)}.text-link{display:inline-flex;gap:8px;align-items:center;color:var(--primary);font-weight:800;font-size:14px}.band-section{background:var(--deep);color:white;margin:34px 0}.split-layout{display:grid;grid-template-columns:.88fr 1.12fr;gap:58px;align-items:center;padding:70px 0}.split-media img{border-radius:22px;min-height:420px;object-fit:cover}.split-copy h2{color:white}.split-copy p{color:#C8C2D8}.split-copy .text-link{color:#CFC6FF}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:28px 0}.mini-grid div{border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:15px}.mini-grid strong,.mini-grid span{display:block}.mini-grid span{font-size:13px;color:#B6AEC7;margin-top:5px}.two-col-info{display:grid;grid-template-columns:1.18fr .82fr;gap:44px;align-items:start}.info-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.info-panel strong{font-size:14px;color:var(--deep)}.info-panel ol{margin:18px 0 0;padding-left:22px;color:var(--muted)}.info-panel li+li{margin-top:10px}.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.device-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}.device-card h3,.device-card h2{font-size:24px;color:var(--deep);margin:7px 0 10px}.device-card p{color:var(--muted);margin-top:0}.device-card ul{padding-left:20px;color:var(--muted);font-size:14px}.device-card li+li{margin-top:7px}.subtle-section{background:var(--bg-soft);padding-inline:34px;border-radius:28px}.topic-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.topic-link{background:rgba(255,255,255,.66);border:1px solid rgba(108,79,248,.12);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:8px}.topic-link strong{color:var(--deep)}.topic-link span{font-size:14px;color:var(--muted)}.related-index{padding-top:50px}.index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.index-grid a{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.index-grid strong{color:var(--deep)}.index-grid span{color:var(--muted);font-size:14px}.breadcrumbs{padding-top:26px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0;padding:0;list-style:none;font-size:13px;color:var(--muted)}.breadcrumbs li+li:before{content:"/";margin-right:8px;color:#B6B0C4}.breadcrumbs a:hover{color:var(--primary)}.page-hero{padding:62px 0 44px}.page-hero.narrow{max-width:900px}.page-hero.official-hero,.page-hero.apps-hero{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}.page-hero img{border-radius:24px;max-height:340px;width:100%;object-fit:cover}.content-column{max-width:920px}.lead-image{margin:0 0 48px}.lead-image img{border-radius:24px;max-height:460px;width:100%;object-fit:cover;background:var(--bg-soft)}.article-block{padding:34px 0;border-top:1px solid var(--line)}.article-block.shellless{max-width:920px}.article-block h2{font-size:32px}.section-lead{font-size:18px!important;color:var(--ink)!important}.check-list{list-style:none;padding:0;margin:22px 0}.check-list li{position:relative;padding-left:30px;color:var(--muted)}.check-list li:before{content:"✓";position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;background:var(--bg-soft);color:var(--primary);font-weight:900;font-size:12px}.check-list li+li{margin-top:12px}.comparison-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}.comparison-table{width:100%;border-collapse:collapse;min-width:680px}.comparison-table th,.comparison-table td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:top}.comparison-table 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span{color:var(--muted);font-size:14px}.guide-table{display:grid;gap:12px;max-width:980px}.guide-table article{display:grid;grid-template-columns:1.1fr .75fr 1.3fr;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px}.guide-table span{display:block;font-size:12px;color:var(--muted)}.guide-table strong,.guide-table a{display:block;margin-top:4px;color:var(--deep);font-weight:800}.guide-table a{color:var(--primary)}.guide-table p{margin:0;color:var(--muted);font-size:14px}.faq-section{max-width:900px}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.faq-item summary{cursor:pointer;padding:18px 20px;font-weight:800;color:var(--deep);list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";float:right;color:var(--primary);font-size:22px;line-height:1}.faq-item[open] summary:after{content:"−"}.faq-answer{padding:0 20px 18px}.faq-answer p{margin:0;color:var(--muted)}.site-footer{background:#fff;border-top:1px solid var(--line);padding:42px 0 22px}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:30px}.footer-intro{max-width:520px}.footer-intro strong{font-size:20px;color:var(--deep)}.footer-intro p{color:var(--muted);font-size:14px}.footer-links{display:flex;flex-wrap:wrap;gap:10px 18px;align-content:start}.footer-links a{font-size:14px;color:var(--muted)}.footer-links a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid var(--line);padding-top:18px;margin-top:24px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.footer-bottom a{color:var(--primary)}:focus-visible{outline:3px solid rgba(108,79,248,.3);outline-offset:3px}
@media (max-width:980px){.primary-nav{position:absolute;top:68px;left:20px;right:20px;display:none;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px;padding:10px}.primary-nav.is-open{display:flex}.nav-toggle{display:inline-flex}.hero,.split-layout,.two-col-info,.page-hero.official-hero,.page-hero.apps-hero{grid-template-columns:1fr}.hero{gap:30px;padding-top:48px}.hero-visual{max-width:760px}.visual-note{left:20px}.device-grid,.topic-links,.index-grid{grid-template-columns:1fr 1fr}.guide-table article{grid-template-columns:1fr 1fr}.guide-table p{grid-column:1/-1}.callout-block{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}}
@media (max-width:680px){:root{--shell:min(100% - 28px,1180px)}.header-inner{min-height:68px}.brand-text small{display:none}.hero{padding-top:34px;padding-bottom:42px}.hero h1,.page-hero h1{font-size:38px}.hero-lead,.page-hero p{font-size:16px}.hero-visual img{min-height:300px}.visual-note{position:static;margin-top:12px}.flow-section{padding:48px 0}.highlight-row{grid-template-columns:48px 1fr}.highlight-row>.text-link{grid-column:2}.split-layout{padding:48px 0}.mini-grid,.device-grid,.topic-links,.index-grid,.decision-grid{grid-template-columns:1fr}.subtle-section{padding-inline:18px}.page-hero{padding:42px 0 30px}.page-hero.official-hero,.page-hero.apps-hero{gap:18px}.article-block h2,.section-heading h2,.split-copy h2,.two-col-info h2{font-size:29px}.check-card{grid-template-columns:46px 1fr;padding:17px}.guide-table article{grid-template-columns:1fr}.guide-table p{grid-column:auto}.footer-bottom{flex-direction:column}.vertical-mobile{width:100%;align-items:stretch}.vertical-mobile .button{width:100%}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
.trouble-intro{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0 0 44px}.trouble-intro>div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.trouble-intro strong{display:block;color:var(--deep);font-size:16px}.trouble-intro p{margin:7px 0 0;color:var(--muted);font-size:14px}.trouble-list{max-width:960px}.trouble-section{padding:34px 0;border-top:1px solid var(--line)}.trouble-section header{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:start}.trouble-section header>span{width:44px;height:44px;border-radius:14px;background:var(--deep);color:#fff;display:grid;place-items:center;font-weight:900;font-size:13px}.trouble-section h2{margin:0 0 8px;color:var(--deep);font-size:28px;line-height:1.28}.trouble-section header p{margin:0;color:var(--muted)}.trouble-section ol{margin:22px 0 0 72px;padding:0;counter-reset:step;list-style:none}.trouble-section li{counter-increment:step;position:relative;padding:0 0 16px 32px;color:var(--muted)}.trouble-section li:before{content:counter(step);position:absolute;left:0;top:2px;width:21px;height:21px;border-radius:50%;background:var(--bg-soft);color:var(--primary);font-size:11px;font-weight:900;display:grid;place-items:center}.diagnostic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}.diagnostic-grid>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.diagnostic-grid span{font-size:12px;color:var(--accent);font-weight:900}.diagnostic-grid strong{display:block;margin-top:4px;color:var(--deep)}.diagnostic-grid p{margin:5px 0 0!important;font-size:14px!important}
@media(max-width:800px){.trouble-intro{grid-template-columns:1fr}.diagnostic-grid{grid-template-columns:1fr}}@media(max-width:560px){.trouble-section header{grid-template-columns:44px 1fr}.trouble-section ol{margin-left:0}.trouble-section h2{font-size:24px}}