:root{
    --brick:#B9473F;--amber:#D89A45;--charcoal:#1E2026;--paper:#F7F4EF;--soft:#EEE9E2;
    --text:#2B2D31;--muted:#6F706F;--accent:#E06A3B;--line:#D8D1C8;--white:#fff;
    --shadow:0 18px 42px rgba(30,32,38,.10);--radius:18px;--container:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","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-underline-offset:4px}button,input{font:inherit}.container{width:min(calc(100% - 40px),var(--container));margin-inline:auto}.narrow{max-width:820px}.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}.skip-link{position:fixed;left:18px;top:12px;z-index:1000;transform:translateY(-160%);background:var(--charcoal);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{transform:none}.eyebrow{margin:0 0 10px;color:var(--brick);font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.section-dark .eyebrow,.section-heading.inverse .eyebrow{color:#efb46a}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,244,239,.96);border-bottom:1px solid rgba(43,45,49,.1);backdrop-filter:blur(12px)}.header-inner{min-height:76px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;margin-right:auto}.brand img{width:48px;height:48px;object-fit:contain;border-radius:12px}.brand-copy{display:flex;flex-direction:column;line-height:1.2}.brand-copy strong{font-size:1.06rem;letter-spacing:.04em}.brand-copy small{margin-top:4px;color:var(--muted);font-size:.72rem}.primary-nav{display:flex;align-items:center;gap:6px}.primary-nav a{padding:10px 12px;text-decoration:none;border-radius:10px;font-size:.94rem;white-space:nowrap}.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--soft);color:var(--brick)}.search-trigger,.menu-toggle,.icon-button{border:1px solid var(--line);background:transparent;border-radius:10px;padding:9px 13px;cursor:pointer;color:var(--text)}.search-trigger:hover,.menu-toggle:hover,.icon-button:hover{border-color:var(--brick);color:var(--brick)}.menu-toggle{display:none}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:300;background:rgba(30,32,38,.72);display:grid;place-items:start center;padding:11vh 20px 30px}.search-dialog{width:min(700px,100%);background:var(--paper);border-radius:22px;box-shadow:var(--shadow);padding:26px}.search-dialog-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.search-dialog h2{font-size:1.5rem;margin:0}.search-form{margin-top:24px}.search-form label{display:block;font-weight:700;margin-bottom:8px}.search-row,.inline-search{display:flex;gap:10px}.search-row input,.inline-search input{min-width:0;flex:1;border:1px solid var(--line);background:#fff;border-radius:12px;padding:13px 14px;color:var(--text)}.search-row input:focus,.inline-search input:focus{outline:3px solid rgba(185,71,63,.18);border-color:var(--brick)}.search-row button,.inline-search button{border:0;background:var(--brick);color:#fff;border-radius:12px;padding:12px 20px;font-weight:700;cursor:pointer}.search-note{color:var(--muted);font-size:.9rem;margin:14px 0 0}.breadcrumbs{width:min(calc(100% - 40px),var(--container));margin:20px auto 0;font-size:.88rem;color:var(--muted)}.breadcrumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa39b}.breadcrumbs a{text-decoration:none}.breadcrumbs a:hover{color:var(--brick)}.hero{padding:74px 0 62px}.hero-grid,.page-hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);align-items:center;gap:64px}.hero-copy h1,.page-hero h1,.simple-page-hero h1,.article-header h1{margin:0;line-height:1.14;letter-spacing:-.03em;color:var(--charcoal)}.hero-copy h1{font-size:clamp(2.45rem,5.2vw,4.85rem);max-width:14ch}.hero-lead{font-size:1.1rem;color:#4c4e52;max-width:62ch;margin:24px 0}.hero-actions,.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:12px;text-decoration:none;font-weight:800;border:1px solid transparent}.button.primary{background:var(--brick);color:#fff}.button.primary:hover{background:#9f3d36}.button.secondary{border-color:var(--line);background:transparent}.button.secondary:hover{border-color:var(--brick);color:var(--brick)}.hero-points{display:flex;flex-wrap:wrap;gap:10px 18px;list-style:none;padding:0;margin:26px 0 0;color:var(--muted);font-size:.9rem}.hero-points li::before{content:"•";color:var(--accent);margin-right:7px}.hero-media,.page-hero figure{margin:0}.hero-media img,.page-hero img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:22px;box-shadow:var(--shadow)}.hero-media figcaption{font-size:.84rem;color:var(--muted);margin-top:10px}.section{padding:72px 0}.section-soft{background:var(--soft)}.section-dark{background:var(--charcoal);color:#eee9e2}.section-accent{background:#f2dfd0}.section-heading{max-width:760px;margin-bottom:34px}.section-heading h2,.feature-copy h2,.two-column h2,.about-strip h2,.callout h2{font-size:clamp(1.7rem,3.2vw,2.7rem);line-height:1.2;margin:0;color:var(--charcoal);letter-spacing:-.02em}.section-heading p:last-child{color:var(--muted)}.section-heading.inverse h2{color:#fff}.section-heading.inverse p:last-child{color:#cfc9c2}.split-heading{max-width:none;display:grid;grid-template-columns:1fr minmax(280px,.55fr);gap:60px;align-items:end}.split-heading>p{margin:0}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic-card{border-top:3px solid var(--brick);padding:24px;background:#fff;border-radius:0 0 16px 16px;box-shadow:0 8px 20px rgba(30,32,38,.05)}.topic-card h3{margin:0 0 12px;font-size:1.2rem}.topic-card p{color:var(--muted);font-size:.95rem}.text-link{color:var(--brick);font-weight:800;text-decoration-thickness:1px}.text-link:hover{color:var(--accent)}.feature-band{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}.feature-band figure{margin:0}.feature-band img,.two-column img{width:100%;border-radius:18px;aspect-ratio:4/3;object-fit:cover}.feature-copy>p:not(.eyebrow),.two-column p,.about-strip p{color:#52545a}.compact-steps{padding-left:22px}.compact-steps li{margin-bottom:10px}.plain-list{padding-left:20px}.plain-list li{margin:8px 0}.editorial-list{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid rgba(255,255,255,.16)}.editorial-item{padding:28px 32px 32px 0;border-bottom:1px solid rgba(255,255,255,.16)}.editorial-item:nth-child(odd){border-right:1px solid rgba(255,255,255,.16);padding-right:38px}.editorial-item:nth-child(even){padding-left:38px}.editorial-kicker{color:#e2a85c;font-size:.78rem;font-weight:800;letter-spacing:.1em}.editorial-item h3{font-size:1.35rem;line-height:1.35;margin:8px 0}.editorial-item h3 a{text-decoration:none}.editorial-item p{color:#c8c3bc}.section-dark .text-link{color:#f0b16a}.highlight-stack{border-top:1px solid var(--line)}.highlight-row{display:grid;grid-template-columns:150px 1fr 110px;gap:26px;align-items:start;padding:28px 0;border-bottom:1px solid var(--line)}.highlight-label{font-weight:800;color:var(--brick)}.highlight-row h3{margin:0 0 8px;font-size:1.35rem}.highlight-row p{margin:0;color:var(--muted)}.arrow-link{justify-self:end;text-decoration:none;font-weight:800;color:var(--brick)}.two-column{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.two-column.reverse figure{order:-1}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.timeline article{background:var(--paper);padding:26px}.timeline span{color:var(--brick);font-weight:900;font-size:.86rem}.timeline h3{font-size:1.15rem;margin:24px 0 8px}.timeline p{margin:0;color:var(--muted);font-size:.94rem}.search-cta{display:grid;grid-template-columns:1fr .85fr;gap:44px;align-items:center}.search-cta h2{margin:0;font-size:clamp(1.7rem,3vw,2.5rem)}.search-cta p{margin-bottom:0}.inline-search{width:100%}.inline-search.compact{margin-top:22px}.inline-search.large{margin-top:24px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{list-style:none;cursor:pointer;font-weight:800;font-size:1.08rem;padding:20px 48px 20px 0;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";position:absolute;right:4px;top:18px;font-size:1.5rem;color:var(--brick)}.faq-list details[open] summary::after{content:"−"}.faq-list details>div{padding:0 54px 18px 0;color:#53555a}.section-end-link{margin-top:28px}.about-strip{display:grid;grid-template-columns:1fr 1fr;gap:60px;padding:34px 0;border-top:2px solid var(--charcoal);border-bottom:1px solid var(--line)}.site-footer{background:var(--charcoal);color:#d8d3cc;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:40px}.footer-title{font-size:1rem;color:#fff;margin:0 0 14px}.site-footer p{color:#aaa59d;font-size:.9rem}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:8px 0}.site-footer a{text-decoration:none}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:30px}.back-top{position:fixed;right:24px;bottom:24px;z-index:80;border:0;background:var(--brick);color:#fff;padding:10px 14px;border-radius:10px;box-shadow:var(--shadow);cursor:pointer}.compact-hero{padding:54px 0 64px}.page-hero h1{font-size:clamp(2.2rem,4.7vw,4rem);max-width:16ch}.page-hero p:not(.eyebrow){color:#55575c;font-size:1.04rem;max-width:60ch}.simple-page-hero{padding:58px 0 42px;text-align:left}.simple-page-hero h1{font-size:clamp(2.1rem,4.2vw,3.5rem)}.simple-page-hero p:not(.eyebrow){font-size:1.05rem;color:var(--muted)}.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.check-grid article{background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px}.check-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#f3dedb;color:var(--brick);font-weight:900}.check-grid h3{margin:16px 0 8px;font-size:1.12rem}.check-grid p{margin:0;color:var(--muted);font-size:.94rem}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:64px;align-items:start}.prose{font-size:1.03rem}.prose h2{font-size:1.75rem;line-height:1.3;margin:36px 0 12px;color:var(--charcoal)}.prose h2:first-child{margin-top:0}.prose p{color:#46484d}.prose a{color:var(--brick);font-weight:700}.aside-card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px}.aside-card.warm{background:#f3e3d2}.aside-card h2{font-size:1.12rem;margin-top:0}.aside-card ul{padding-left:18px}.aside-card li{margin:8px 0;color:#55575b}.aside-card p{font-size:.94rem;color:#55575b}.aside-card a{color:var(--brick);font-weight:700}.comparison-table{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}.comparison-table table{width:100%;border-collapse:collapse;min-width:760px}.comparison-table th,.comparison-table td{text-align:left;padding:18px;border-bottom:1px solid var(--line);vertical-align:top}.comparison-table th{background:var(--charcoal);color:#fff}.comparison-table tr:last-child td{border-bottom:0}.intent-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.intent-grid article{padding:26px;border-top:4px solid var(--amber);background:#fff}.intent-grid span{font-weight:900;color:var(--amber)}.intent-grid h2{font-size:1.25rem;margin:20px 0 8px}.intent-grid p{color:var(--muted);margin-bottom:0}.guide-list{display:grid;gap:20px}.guide-block{display:grid;grid-template-columns:92px 1fr;gap:28px;padding:30px 0;border-bottom:1px solid var(--line)}.guide-number{font-size:2.4rem;font-weight:900;color:#d6ccc1;line-height:1}.guide-block h2{font-size:1.5rem;margin:0 0 16px}.guide-block ol{padding-left:20px;margin:0}.guide-block li{margin:10px 0}.troubleshoot{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.troubleshoot article{padding:22px;border:1px solid var(--line);border-radius:14px}.troubleshoot h3{margin-top:0;font-size:1.08rem}.troubleshoot p{margin-bottom:0;color:var(--muted);font-size:.93rem}.full-faq summary{font-size:1.16rem;padding-block:24px}.callout{background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px}.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.safety-grid article{padding:26px;background:#fff;border-left:4px solid var(--brick)}.safety-grid h3{margin:0 0 8px}.safety-grid p{margin:0;color:var(--muted)}code{background:#e8e1d9;padding:2px 6px;border-radius:5px}.contact-layout{display:grid;grid-template-columns:1fr 330px;gap:54px;align-items:start}.feedback-template{background:#fff;border:1px solid var(--line);padding:30px;border-radius:18px}.feedback-template h2{margin-top:0}.feedback-template li{margin:14px 0}.article-header{padding-top:58px}.article-header h1{font-size:clamp(2.2rem,4.9vw,4.2rem)}.article-deck{font-size:1.12rem;color:#55575c}.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.9rem}.article-cover{margin-top:36px}.article-cover img{width:100%;max-height:620px;object-fit:cover;border-radius:20px}.article-layout{padding-top:56px;padding-bottom:72px}.article-prose section{padding-bottom:8px}.sticky-aside{position:sticky;top:104px}.sticky-aside dl{display:grid;grid-template-columns:80px 1fr;gap:10px 14px;font-size:.92rem}.sticky-aside dt{color:var(--muted)}.sticky-aside dd{margin:0}.result-count{color:var(--muted)}.search-results{border-top:1px solid var(--line)}.search-results article{padding:26px 0;border-bottom:1px solid var(--line)}.search-results span{font-size:.8rem;color:var(--brick);font-weight:800}.search-results h2{font-size:1.35rem;margin:8px 0}.search-results h2 a{text-decoration:none}.search-results p{color:var(--muted)}.empty-state{padding:34px;border:1px dashed #b9b0a6;background:#fff;border-radius:16px}.error-page{text-align:center}.error-page .button-row{justify-content:center}.link-panel{background:#fff;border:1px solid var(--line);padding:26px;border-radius:16px}.link-panel h2{margin-top:0}.link-panel li{margin:10px 0}.link-panel a{color:var(--brick);font-weight:700}
@media (max-width:1100px){.primary-nav{gap:2px}.primary-nav a{padding:9px 8px;font-size:.89rem}.topic-grid{grid-template-columns:repeat(2,1fr)}.timeline,.check-grid,.troubleshoot{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){.menu-toggle{display:inline-flex}.primary-nav{display:none;position:absolute;top:76px;left:20px;right:20px;background:var(--paper);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}.primary-nav.is-open{display:flex}.primary-nav a{padding:12px}.search-trigger{display:none}.hero-grid,.page-hero-grid,.feature-band,.two-column,.search-cta,.reading-layout,.contact-layout{grid-template-columns:1fr}.hero-grid,.page-hero-grid{gap:38px}.hero-copy h1,.page-hero h1{max-width:none}.hero-media{max-width:720px}.split-heading{grid-template-columns:1fr;gap:14px}.footer-grid{grid-template-columns:repeat(2,1fr)}.reading-layout{gap:28px}.sticky-aside{position:static}.contact-layout{gap:24px}}
@media (max-width:700px){.container{width:min(calc(100% - 28px),var(--container))}.header-inner{min-height:68px}.brand img{width:42px;height:42px}.brand-copy small{display:none}.primary-nav{top:68px;left:14px;right:14px}.hero{padding:48px 0}.section{padding:54px 0}.topic-grid,.editorial-list,.intent-grid,.safety-grid{grid-template-columns:1fr}.editorial-item,.editorial-item:nth-child(odd),.editorial-item:nth-child(even){padding:24px 0;border-right:0}.highlight-row{grid-template-columns:1fr;gap:10px}.arrow-link{justify-self:start}.timeline,.check-grid,.troubleshoot{grid-template-columns:1fr}.about-strip{grid-template-columns:1fr;gap:22px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid section:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:4px}.guide-block{grid-template-columns:1fr;gap:12px}.guide-number{font-size:1.6rem}.search-row,.inline-search{flex-direction:column}.search-row button,.inline-search button{width:100%}.page-hero figure{max-width:560px}.article-cover{width:100%;margin-top:28px}.article-cover img{border-radius:0}.article-header{padding-top:42px}}
@media (max-width:480px){.container{width:min(calc(100% - 22px),var(--container))}.brand-copy strong{font-size:.98rem}.menu-toggle{padding:8px 10px}.hero-copy h1{font-size:2.32rem}.hero-lead{font-size:1rem}.hero-actions .button{width:100%}.topic-grid{grid-template-columns:1fr}.section-heading h2,.feature-copy h2,.two-column h2,.about-strip h2{font-size:1.75rem}.footer-grid{grid-template-columns:1fr}.footer-grid section:first-child{grid-column:auto}.button-row .button{width:100%}.search-dialog{padding:20px}.back-top{right:14px;bottom:14px}.compact-hero{padding-top:40px}.page-hero h1{font-size:2.15rem}.article-header h1{font-size:2.25rem}}