:root{
    --brand:#C84A5A;
    --copper:#D08A48;
    --deep:#121214;
    --bg:#17171A;
    --panel:#222226;
    --panel-2:#2A292E;
    --text:#F1EEEE;
    --muted:#A9A3A6;
    --accent:#E59A3A;
    --line:rgba(241,238,238,.12);
    --line-strong:rgba(241,238,238,.22);
    --max:1180px;
    --reading:780px;
    --radius:20px;
    --shadow:0 22px 60px rgba(0,0,0,.26);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;line-height:1.72;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.skip-link{position:fixed;left:16px;top:8px;z-index:9999;padding:10px 14px;background:var(--text);color:var(--deep);transform:translateY(-160%);border-radius:8px}
.skip-link:focus{transform:translateY(0)}
.section-shell{width:min(var(--max),calc(100% - 48px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);background:rgba(18,18,20,.92);backdrop-filter:blur(16px)}
.header-shell{width:min(var(--max),calc(100% - 48px));height:76px;margin:auto;display:flex;align-items:center;gap:26px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:760;letter-spacing:.02em}
.brand img{width:42px;height:42px;object-fit:cover;border-radius:12px}
.brand-word{font-size:1.05rem}
.primary-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
.primary-nav a{padding:9px 12px;border-radius:10px;color:var(--muted);font-size:.94rem;transition:.2s ease}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:rgba(200,74,90,.12);color:var(--text)}
.nav-toggle{display:none}
.search-open,.nav-toggle{border:1px solid var(--line);background:var(--panel);color:var(--text);padding:9px 13px;border-radius:10px}
.search-open:hover{border-color:var(--brand)}
.search-modal[hidden]{display:none!important}
.search-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:start center;padding-top:12vh}
.search-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.72);backdrop-filter:blur(8px)}
.search-dialog{position:relative;width:min(640px,calc(100% - 32px));padding:34px;background:var(--panel);border:1px solid var(--line-strong);border-radius:24px;box-shadow:var(--shadow)}
.search-close{position:absolute;right:16px;top:16px;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--text);font-size:1.35rem}
.search-dialog h2{margin:4px 0 18px;font-size:clamp(1.5rem,4vw,2.2rem)}
.search-form label,.search-page-form label{display:block;color:var(--muted);margin-bottom:9px}
.search-row{display:flex;gap:10px}
.search-row input{min-width:0;flex:1;border:1px solid var(--line-strong);background:var(--deep);color:var(--text);padding:13px 14px;border-radius:12px;outline:none}
.search-row input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,74,90,.14)}
.search-row button{border:0;background:var(--brand);color:#fff;padding:12px 18px;border-radius:12px;font-weight:700}
.eyebrow{text-transform:none;letter-spacing:.08em;font-size:.76rem;font-weight:800;color:var(--copper);margin:0 0 10px}
.home-hero{display:grid;grid-template-columns:1.07fr .93fr;gap:54px;align-items:center;padding-block:72px 68px;min-height:620px}
.hero-copy h1,.page-hero h1,.not-found h1{margin:0;line-height:1.12;letter-spacing:-.035em;font-size:clamp(2.5rem,5.5vw,5.2rem);max-width:12ch}
.hero-lead,.page-lead{font-size:1.08rem;color:#D5D0D2;max-width:720px;margin:22px 0 0}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:18px;margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 17px;border-radius:12px;font-weight:760;border:1px solid transparent;transition:.2s ease}
.button:hover{transform:translateY(-1px)}
.button-primary{background:var(--brand);color:#fff}.button-primary:hover{background:#D15565}
.button-secondary{background:var(--panel);border-color:var(--line-strong)}.button-secondary:hover{border-color:var(--copper)}
.text-link{color:#F2C29A;font-weight:700}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.strong-link{color:var(--accent)}
.domain-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:40px 0 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.domain-facts div{padding:18px 18px 18px 0}.domain-facts div+div{padding-left:18px;border-left:1px solid var(--line)}
.domain-facts dt{font-size:.76rem;color:var(--muted);margin-bottom:6px}.domain-facts dd{margin:0;font-size:.9rem;font-weight:700}
.hero-visual{margin:0;position:relative}.hero-visual img{width:100%;aspect-ratio:1.25/1;object-fit:cover;border-radius:28px;border:1px solid var(--line);box-shadow:var(--shadow)}
.hero-visual:before{content:"";position:absolute;inset:-12px 12% auto -14px;height:3px;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:99px}
.hero-visual figcaption{font-size:.78rem;color:var(--muted);margin-top:10px}
.intent-strip{background:var(--deep);border-block:1px solid var(--line)}
.intent-grid{display:grid;grid-template-columns:.8fr 1.5fr;gap:70px;padding-block:64px}
.intent-title h2,.section-heading h2,.compact-heading h2,.app-copy h2,.check-panel h3,.rail-header h2,.faq-teaser h2,.device-section h2,.article-callout h2,.result-head h2{margin:0;font-size:clamp(1.75rem,3vw,2.8rem);line-height:1.2;letter-spacing:-.025em}
.intent-list{display:grid;gap:0}.intent-item{padding:0 0 26px 0;border-bottom:1px solid var(--line)}.intent-item+.intent-item{padding-top:26px}.intent-item h3{margin:0 0 8px;font-size:1.15rem}.intent-item p{color:var(--muted);margin:0 0 10px}.intent-item a{color:#F0B77B;font-weight:700;font-size:.92rem}
.access-focus,.guide-preview,.related-rail,.faq-teaser,.next-paths{padding-block:82px}
.section-heading{max-width:820px;margin-bottom:34px}.section-heading p:last-child,.compact-heading>p:last-child{color:var(--muted);max-width:760px}.compact-heading{max-width:760px;margin-bottom:26px}
.split-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:stretch}.split-feature.reverse{grid-template-columns:.95fr 1.05fr}.editorial-image{margin:0}.editorial-image img,.guide-image img{width:100%;height:100%;object-fit:cover;border-radius:24px;border:1px solid var(--line)}
.check-panel{padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:24px}.check-panel h3{font-size:1.55rem}.number-list{counter-reset:item;list-style:none;padding:0;margin:20px 0 26px}.number-list li{counter-increment:item;display:grid;grid-template-columns:30px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);color:#D6D0D2}.number-list li:before{content:counter(item,decimal-leading-zero);color:var(--copper);font-size:.78rem;font-weight:800}
.app-band{background:linear-gradient(180deg,#1D1B1E,#181719);border-block:1px solid var(--line)}
.app-band-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center;padding-block:78px}.app-copy p,.plain-list{color:#C5BFC1}.plain-list{padding-left:20px;margin:22px 0}.plain-list li{margin-bottom:8px}.phone-visual{margin:0;display:flex;justify-content:center}.phone-visual img{max-height:510px;object-fit:contain;border-radius:22px}
.guide-layout{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-bottom:28px}.guide-image{margin:0}.step-summary{list-style:none;padding:0;margin:0;display:grid}.step-summary li{display:grid;grid-template-columns:42px 1fr;gap:14px;padding:17px 0;border-bottom:1px solid var(--line)}.step-summary li>span{display:grid;place-items:center;width:34px;height:34px;border:1px solid rgba(208,138,72,.38);color:var(--accent);border-radius:50%;font-size:.78rem;font-weight:800}.step-summary strong{display:block;margin-bottom:3px}.step-summary p{margin:0;color:var(--muted);font-size:.93rem}
.related-rail{border-top:1px solid var(--line)}.rail-header{display:flex;gap:30px;align-items:end;justify-content:space-between;margin-bottom:26px}.rail-content{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:center}.rail-content figure{margin:0}.rail-content img{border-radius:20px;border:1px solid var(--line)}.rail-content p{color:#CBC5C7}
.faq-teaser{display:grid;grid-template-columns:1fr .75fr;gap:38px;align-items:center;border-top:1px solid var(--line)}.faq-teaser-copy p{color:var(--muted);max-width:700px}.faq-teaser figure{margin:0}.faq-teaser img{border-radius:20px;border:1px solid var(--line)}
.site-footer{margin-top:30px;background:var(--deep);border-top:1px solid var(--line)}.footer-shell{width:min(var(--max),calc(100% - 48px));margin:auto;padding:58px 0 34px;display:grid;grid-template-columns:.8fr 1.4fr;gap:70px}.footer-intro p{color:var(--muted);max-width:440px}.footer-brand{margin-bottom:12px}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.footer-links h2{font-size:.84rem;color:#D8D1D3;margin:0 0 12px}.footer-links a{display:block;color:var(--muted);font-size:.9rem;padding:5px 0}.footer-links a:hover{color:var(--text)}.footer-bottom{width:min(var(--max),calc(100% - 48px));margin:auto;border-top:1px solid var(--line);padding:18px 0 26px;display:flex;justify-content:space-between;color:#7F797C;font-size:.8rem}
.back-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line-strong);background:var(--panel);color:var(--text);opacity:0;pointer-events:none;transform:translateY(10px);transition:.2s ease;z-index:30}.back-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.page-hero{padding-block:52px 34px}.page-hero h1{font-size:clamp(2.35rem,5vw,4.5rem);max-width:15ch}.narrow-hero{max-width:var(--max)}.inline-fact{display:inline-flex;gap:12px;align-items:center;margin-top:24px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}.inline-fact span{color:var(--muted);font-size:.82rem}.inline-fact strong{font-size:.9rem}
.breadcrumb{margin-bottom:28px}.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;gap:9px;flex-wrap:wrap;font-size:.82rem;color:var(--muted)}.breadcrumb li+li:before{content:"/";margin-right:9px;color:#5E595C}.breadcrumb a:hover{color:var(--text)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:48px;padding-bottom:80px}.prose-card{min-width:0}.prose-section{padding:28px 0;border-top:1px solid var(--line)}.prose-section:first-child{border-top:0}.prose-section h2{margin:0 0 14px;line-height:1.28;font-size:1.55rem}.prose-section p{margin:0 0 14px;color:#D0CACC}.prose-section a{color:#F1BB82;text-decoration:underline;text-underline-offset:3px}.article-aside{position:relative}.article-aside figure{margin:0 0 20px}.article-aside img{border-radius:20px;border:1px solid var(--line)}.notice{padding:18px;border-radius:16px;border:1px solid var(--line);background:var(--panel)}.notice strong{display:block;margin-bottom:7px}.notice p{margin:0;color:var(--muted);font-size:.92rem}.notice-warm{border-color:rgba(208,138,72,.35);background:rgba(208,138,72,.07)}.aside-links{margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}.aside-links h2{font-size:.9rem;margin:0 0 10px}.aside-links a{display:block;padding:8px 0;color:#C7BFC2;font-size:.9rem}.check-list{list-style:none;padding:0;margin:16px 0}.check-list li{position:relative;padding:12px 0 12px 26px;border-bottom:1px solid var(--line);color:#D2CCCE}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:900}.link-ledger{display:grid;gap:10px}.link-ledger a{display:grid;grid-template-columns:210px 1fr;gap:18px;padding:17px 18px;border:1px solid var(--line);border-radius:14px;text-decoration:none;background:rgba(255,255,255,.012)}.link-ledger a:hover{border-color:rgba(208,138,72,.45);background:rgba(208,138,72,.05)}.link-ledger span{color:var(--muted)}.three-cols{grid-template-columns:repeat(3,1fr)}.three-cols a{display:block}.three-cols a strong{display:block;margin-bottom:7px}.three-cols a span{display:block}.hero-two-col{display:grid;grid-template-columns:1.08fr .72fr;gap:46px;align-items:center}.hero-two-col figure{margin:0}.hero-two-col img{border-radius:24px;border:1px solid var(--line)}
.topic-stack{padding-block:34px 80px}.topic-row{display:grid;grid-template-columns:90px minmax(0,1fr);gap:22px;padding:30px 0;border-top:1px solid var(--line)}.topic-index{color:var(--copper);font-size:.83rem;font-weight:800;padding-top:5px}.topic-row h2{margin:0 0 8px;font-size:1.45rem}.topic-row p{margin:0;color:#C8C2C4;max-width:850px}.device-section,.guide-deep-dive,.privacy-callout,.principle-section{background:var(--deep);border-block:1px solid var(--line)}.device-grid{padding-block:70px;display:grid;grid-template-columns:.78fr 1.2fr;gap:56px}.device-grid>div:first-child p{color:var(--muted)}.device-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.device-notes article{padding:20px;border:1px solid var(--line);border-radius:18px;background:var(--panel)}.device-notes h3{margin:0 0 9px}.device-notes p{margin:0;color:var(--muted);font-size:.92rem}.article-callout{display:grid;grid-template-columns:.72fr 1.2fr;gap:38px;align-items:center;padding-block:72px}.article-callout figure{margin:0}.article-callout img{border-radius:20px;border:1px solid var(--line)}.article-callout p{color:var(--muted)}.compact-callout{grid-template-columns:1fr;padding-block:58px}
.timeline-section{padding-block:24px 80px}.timeline{list-style:none;padding:0;margin:0 auto;max-width:920px}.timeline li{display:grid;grid-template-columns:74px 1fr;gap:22px;padding:26px 0;border-top:1px solid var(--line)}.timeline-step{width:52px;height:52px;display:grid;place-items:center;border-radius:50%;border:1px solid rgba(200,74,90,.42);color:#E98592;font-weight:800}.timeline-body h2{margin:0 0 8px;font-size:1.4rem}.timeline-body p{margin:0;color:#CAC4C6}.guide-deep-dive .split-feature{padding-block:70px}
.submit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 42px;padding-block:28px 74px}.submit-item{position:relative;padding:28px 0 28px 54px;border-top:1px solid var(--line)}.submit-item>span{position:absolute;left:0;top:32px;color:var(--accent);font-size:.8rem;font-weight:800}.submit-item h2{margin:0 0 8px;font-size:1.35rem}.submit-item p{margin:0;color:#C8C2C4}.source-matrix{padding-bottom:78px}.matrix-table{border:1px solid var(--line);border-radius:18px;overflow:hidden}.matrix-row{display:grid;grid-template-columns:.65fr 1fr 1.35fr}.matrix-row span{padding:14px 16px;border-top:1px solid var(--line);border-right:1px solid var(--line);color:#CCC6C8}.matrix-row span:last-child{border-right:0}.matrix-head{background:var(--panel)}.matrix-head span{border-top:0;color:var(--text);font-weight:700;font-size:.9rem}
.faq-list{padding-block:24px 78px;max-width:1000px}.faq-item{border-top:1px solid var(--line)}.faq-item h2{margin:0}.faq-item button{width:100%;display:flex;justify-content:space-between;gap:20px;align-items:center;text-align:left;border:0;background:transparent;color:var(--text);padding:22px 0;font-weight:720;font-size:1.04rem}.faq-icon{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);color:var(--accent);flex:none;transition:.2s ease}.faq-item button[aria-expanded="true"] .faq-icon{transform:rotate(45deg)}.faq-answer{padding:0 0 24px;max-width:820px}.faq-answer p{margin:0;color:var(--muted)}.faq-answer[hidden]{display:none!important}
.about-story{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:center;padding-block:36px 78px}.about-story figure{margin:0}.about-story img{border-radius:24px;border:1px solid var(--line)}.principle-section .section-shell{padding-block:70px}.principle-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.principle-list article{padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}.principle-list h3{margin:0 0 8px;font-size:1rem}.principle-list p{margin:0;color:var(--muted);font-size:.9rem}
.safety-list{padding-block:28px 70px}.safety-list article{display:grid;grid-template-columns:58px 1fr;gap:22px;padding:24px 0;border-top:1px solid var(--line)}.safety-list>article>span{color:var(--accent);font-size:.8rem;font-weight:800;padding-top:5px}.safety-list h2{margin:0 0 8px;font-size:1.35rem}.safety-list p{margin:0;color:var(--muted);max-width:900px}.single-prose{max-width:920px;padding-bottom:70px}
.privacy-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:44px;align-items:start;padding-block:34px 80px}.privacy-layout figure{margin:0;position:sticky;top:104px}.privacy-layout img{border-radius:22px;border:1px solid var(--line)}.privacy-entries section{padding:22px 0;border-top:1px solid var(--line)}.privacy-entries h2{margin:0 0 7px;font-size:1.3rem}.privacy-entries p{margin:0;color:#C9C3C5}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-block:28px 62px}.contact-grid article{padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--panel)}.contact-grid h2{margin:0 0 9px;font-size:1.2rem}.contact-grid p{margin:0;color:var(--muted)}
.search-page-form{margin-top:26px;max-width:720px}.search-results{padding-block:20px 80px}.empty-state{padding:36px;border:1px solid var(--line);background:var(--panel);border-radius:20px}.empty-state h2{margin-top:0}.empty-state p{color:var(--muted)}.empty-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.empty-links a{padding:9px 12px;border:1px solid var(--line);border-radius:10px}.result-head{display:flex;justify-content:space-between;align-items:end;border-bottom:1px solid var(--line);padding-bottom:18px}.result-head h2{font-size:1.6rem}.result-head p{margin:0;color:var(--muted)}.result-list article{padding:24px 0;border-bottom:1px solid var(--line)}.result-list h3{margin:0 0 7px;font-size:1.25rem}.result-list h3 a:hover{color:#F1B06B}.result-list p{margin:0 0 8px;color:var(--muted);max-width:850px}.result-path{color:#B6875D;font-size:.82rem}
.not-found{padding-block:90px 110px;max-width:980px}.error-code{font-size:clamp(4rem,14vw,10rem);line-height:.8;margin:0 0 22px;color:rgba(200,74,90,.22);font-weight:900;letter-spacing:-.06em}.not-found h1{max-width:13ch}.not-found>p:not(.error-code):not(.eyebrow){max-width:720px;color:var(--muted);font-size:1.05rem}.not-found-actions{display:flex;gap:12px;margin:28px 0 40px;flex-wrap:wrap}
@media (max-width:1024px){
    .home-hero{grid-template-columns:1fr;min-height:0}.hero-visual{max-width:760px}.intent-grid{grid-template-columns:1fr;gap:34px}.article-layout{grid-template-columns:1fr}.article-aside{display:grid;grid-template-columns:.7fr 1.3fr;gap:20px}.article-aside .aside-links{grid-column:1/-1}.device-grid{grid-template-columns:1fr}.principle-list{grid-template-columns:repeat(3,1fr)}.privacy-layout{grid-template-columns:1fr}.privacy-layout figure{position:static;max-width:620px}.footer-shell{grid-template-columns:1fr;gap:36px}
}
@media (max-width:860px){
    .header-shell{height:68px}.nav-toggle{display:block;margin-left:auto}.primary-nav{position:absolute;top:68px;left:0;right:0;margin:0;padding:12px 24px 20px;background:var(--deep);border-bottom:1px solid var(--line);display:none;flex-direction:column;align-items:stretch}.primary-nav.open{display:flex}.primary-nav a{padding:11px 8px}.search-open{margin-left:0}.home-hero{padding-top:50px}.domain-facts{grid-template-columns:1fr}.domain-facts div+div{padding-left:0;border-left:0;border-top:1px solid var(--line)}.split-feature,.split-feature.reverse,.app-band-grid,.guide-layout,.rail-content,.faq-teaser,.hero-two-col,.article-callout,.about-story{grid-template-columns:1fr}.device-notes{grid-template-columns:1fr}.submit-grid{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr}.three-cols{grid-template-columns:1fr}.link-ledger a{grid-template-columns:1fr}.rail-header{align-items:flex-start;flex-direction:column}.article-aside{grid-template-columns:1fr}.principle-list{grid-template-columns:1fr 1fr}.matrix-row{grid-template-columns:.7fr 1fr 1.2fr;font-size:.9rem}.footer-links{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
    .section-shell,.header-shell,.footer-shell,.footer-bottom{width:min(100% - 30px,var(--max))}.brand-word{font-size:.96rem}.search-open{padding:8px 10px}.home-hero{gap:30px;padding-block:36px 46px}.hero-copy h1,.page-hero h1,.not-found h1{font-size:clamp(2.1rem,11vw,3.25rem)}.hero-lead,.page-lead{font-size:1rem}.hero-actions{align-items:stretch;flex-direction:column}.button{width:100%}.intent-grid,.access-focus,.guide-preview,.related-rail,.faq-teaser,.next-paths{padding-block:54px}.app-band-grid,.device-grid,.principle-section .section-shell{padding-block:54px}.check-panel{padding:22px}.topic-row{grid-template-columns:44px 1fr}.timeline li{grid-template-columns:52px 1fr;gap:12px}.timeline-step{width:42px;height:42px}.matrix-table{overflow-x:auto}.matrix-row{min-width:670px}.principle-list,.footer-links{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:6px}.search-row{flex-direction:column}.search-row button{width:100%}.article-callout{padding-block:54px}.footer-shell{padding-top:44px}.back-top{right:14px;bottom:14px}.contact-grid{padding-bottom:50px}
}
@media (max-width:375px){
    .section-shell,.header-shell,.footer-shell,.footer-bottom{width:calc(100% - 24px)}.header-shell{gap:10px}.brand img{width:36px;height:36px}.brand-word{display:none}.nav-toggle,.search-open{font-size:.88rem}.page-hero{padding-top:38px}.topic-row{grid-template-columns:1fr;gap:6px}.topic-index{padding:0}.timeline li{grid-template-columns:1fr}.domain-facts dd{font-size:.86rem}
}