:root{
  --brick:#B9473F;--amber:#D89A45;--coal:#1E2026;--paper:#F7F4EF;--soft:#EEE9E2;--ink:#2B2D31;--muted:#6F706F;--accent:#E06A3B;--line:#D8D1C8;--white:#fff;
  --radius-lg:28px;--radius-md:18px;--radius-sm:12px;--shadow:0 18px 50px rgba(30,32,38,.08);--max:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}body.modal-open{overflow:hidden}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.narrow{width:min(100%,880px);margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:var(--coal);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,244,239,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,209,200,.8)}.header-row{min-height:78px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:11px;min-width:max-content}.brand img{width:48px;height:48px;object-fit:contain}.brand-copy{display:flex;flex-direction:column;line-height:1.2}.brand-copy strong{font-size:17px}.brand-copy small{font-size:11px;color:var(--muted);margin-top:5px;letter-spacing:.08em}.primary-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.primary-nav a{padding:10px 12px;border-radius:10px;font-size:14px;color:#47484c}.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--soft);color:var(--brick)}.search-open,.nav-toggle{border:1px solid var(--line);background:transparent;border-radius:12px;padding:9px 13px;color:var(--ink)}.search-open:hover,.nav-toggle:hover{border-color:var(--brick);color:var(--brick)}.nav-toggle{display:none}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:500;display:grid;place-items:start center;padding-top:14vh}.search-modal__backdrop{position:absolute;inset:0;background:rgba(20,21,24,.66)}.search-modal__panel{position:relative;z-index:1;width:min(calc(100% - 32px),720px);background:var(--paper);border-radius:24px;padding:34px;box-shadow:0 30px 100px rgba(0,0,0,.28)}.search-modal__close{position:absolute;right:18px;top:16px;width:38px;height:38px;border:0;background:var(--soft);border-radius:50%;font-size:28px;line-height:1}.search-form label,.inline-search label{display:block;font-weight:700;margin-bottom:8px}.search-form__row,.inline-search div{display:flex;gap:10px}.search-form input,.inline-search input{flex:1;min-width:0;border:1px solid var(--line);background:#fff;border-radius:12px;padding:13px 14px;outline:none}.search-form input:focus,.inline-search input:focus{border-color:var(--brick);box-shadow:0 0 0 3px rgba(185,71,63,.12)}.search-form button,.inline-search button{border:0;border-radius:12px;padding:12px 18px;background:var(--brick);color:#fff;font-weight:700}.muted{color:var(--muted);font-size:14px}.eyebrow{text-transform:none;letter-spacing:.08em;color:var(--brick);font-size:13px;font-weight:800;margin:0 0 12px}.hero{padding:58px 0 74px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center}.hero h1,.page-hero h1,.article-header h1{font-size:clamp(38px,5vw,68px);line-height:1.12;letter-spacing:-.04em;margin:0 0 22px;color:var(--coal)}.hero-lead{font-size:18px;color:#505157;max-width:720px}.hero-actions,.button-group{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 17px;border-radius:12px;border:1px solid transparent;font-weight:700}.button--primary{background:var(--brick);color:#fff}.button--primary:hover{background:#9f3833}.button--secondary{background:#fff;border-color:var(--line)}.button--secondary:hover{border-color:var(--brick);color:var(--brick)}.button--ghost{background:transparent;border-color:var(--line);color:var(--ink)}.hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:34px 0 0}.hero-points div{border-top:2px solid var(--coal);padding-top:12px}.hero-points dt{font-weight:800}.hero-points dd{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.55}.hero-media{margin:0;background:var(--coal);border-radius:var(--radius-lg);padding:14px;box-shadow:var(--shadow);transform:rotate(1deg)}.hero-media img{aspect-ratio:1.22/1;object-fit:cover;border-radius:20px}.hero-media figcaption{color:#d9d4cc;padding:14px 7px 4px;font-size:13px}.section{padding:82px 0}.section--tight{padding-top:42px}.section--warm{background:var(--soft)}.section--soft{background:#f1ece5}.section--dark{background:var(--coal);color:#f7f4ef}.section--dark h2,.section--dark h3{color:#fff}.section--closing{padding-bottom:110px}.section-heading{max-width:760px;margin-bottom:30px}.section-heading h2,.image-text h2,.topic-band h2,.callout h2,.prose h2,.info-panel h2,.two-col h2,.checklist h2,.search-empty h2{font-size:clamp(27px,3vw,42px);line-height:1.25;letter-spacing:-.025em;margin:0 0 14px;color:var(--coal)}.section-heading p,.image-text p,.topic-band p,.callout p{color:var(--muted)}.section--dark .section-heading h2,.section--dark .section-heading p,.section--dark .two-col p{color:#e7e1d9}.split-heading{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;max-width:none;align-items:end}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-card{background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease}.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.topic-card img{width:100%;aspect-ratio:1.7/1;object-fit:cover}.topic-card__body{padding:20px}.topic-card h3{margin:0 0 8px;font-size:20px}.topic-card p{margin:0 0 14px;color:var(--muted);font-size:14px}.text-link{color:var(--brick);font-weight:800;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}.editorial-grid{display:grid;grid-template-columns:1.5fr .7fr;gap:42px;align-items:start}.article-list{display:grid;gap:0;border-top:1px solid var(--line);margin-bottom:28px}.article-list--two{grid-template-columns:repeat(2,1fr);gap:16px;border-top:0}.article-card{padding:24px 0;border-bottom:1px solid var(--line)}.article-list--two .article-card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:22px}.article-card__meta{display:flex;flex-wrap:wrap;gap:9px;color:var(--muted);font-size:12px}.article-card__meta span:first-child{color:var(--brick);font-weight:800}.article-card h3{font-size:22px;line-height:1.35;margin:8px 0}.article-card h3 a:hover{color:var(--brick)}.article-card p{color:var(--muted);margin:0 0 12px}.editorial-aside{position:sticky;top:102px}.editorial-aside>img{width:100%;aspect-ratio:1/1.05;object-fit:cover;border-radius:24px}.aside-note{background:var(--soft);border-radius:0 0 24px 24px;padding:24px;margin-top:-20px;position:relative}.aside-note h2{font-size:26px;line-height:1.25}.number-list{padding-left:22px}.number-list li+li{margin-top:7px}.route-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}.route-grid h2{font-size:44px;line-height:1.2;margin:0 0 16px}.route-grid p{color:#d4d0ca}.route-steps{display:grid;gap:10px}.route-steps a{display:grid;grid-template-columns:60px 1fr;gap:2px 14px;border:1px solid #41434a;border-radius:16px;padding:17px 18px}.route-steps a:hover{border-color:var(--amber);background:#25272e}.route-steps span{grid-row:1/3;font-size:28px;color:var(--amber)}.route-steps strong{font-size:17px}.route-steps small{color:#b8b4ae}.image-text,.two-col,.closing-grid{display:grid;grid-template-columns:1fr 1fr;gap:58px;align-items:center}.image-text--reverse figure{order:2}.image-text figure{margin:0}.image-text img,.two-col img,.closing-grid img{width:100%;border-radius:24px;aspect-ratio:1.45/1;object-fit:cover}.topic-band{display:grid;grid-template-columns:.65fr 1.35fr;gap:44px;align-items:center;border:1px solid var(--line);border-radius:28px;padding:26px;background:#fff}.topic-band img{width:100%;border-radius:20px;aspect-ratio:1.38/1;object-fit:cover}.guide-list{border-top:1px solid var(--line)}.guide-row{display:grid;grid-template-columns:220px 1fr 80px;gap:22px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}.guide-row span{color:var(--muted)}.guide-row em{font-style:normal;color:var(--brick);font-weight:800;text-align:right}.guide-row:hover strong{color:var(--brick)}.guide-list--large .guide-row{padding:24px 0}.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}.faq-item{border:1px solid var(--line);background:#fff;border-radius:14px;padding:0 18px}.faq-item summary{cursor:pointer;font-weight:800;padding:16px 30px 16px 0;position:relative;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:'+';position:absolute;right:0;top:12px;font-size:24px;color:var(--brick)}.faq-item[open] summary:after{content:'−'}.faq-item p{margin:0 0 18px;color:var(--muted)}.inline-links{display:flex;gap:14px;flex-wrap:wrap}.inline-links a{color:var(--brick);text-decoration:underline;text-underline-offset:4px}.site-footer{background:#17191e;color:#d7d3cd;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr 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p{color:var(--muted);font-size:14px}.filter-nav{display:flex;flex-wrap:wrap;gap:10px}.filter-nav a,.tag-links a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:14px}.filter-nav a:hover,.tag-links a:hover{border-color:var(--brick);color:var(--brick)}.cluster-section+.cluster-section{border-top:1px solid var(--line)}.faq-page-list{display:grid;gap:12px;max-width:920px}.faq-page-list .faq-item{padding-inline:22px}.faq-page-list summary{font-size:18px}.faq-page-list summary span{display:inline-block;color:var(--amber);margin-right:12px}.article-header{padding:38px 0 48px}.article-header__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center}.article-header h1{font-size:clamp(34px,4vw,54px)}.article-header img{width:100%;border-radius:24px;aspect-ratio:1.45/1;object-fit:cover}.article-kicker{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted)}.article-kicker 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@media (max-width:1100px){.primary-nav a{padding-inline:9px}.hero-grid,.page-hero__grid,.article-header__grid{gap:34px}.topic-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid nav:last-child{grid-column:2/4}.steps-layout{grid-template-columns:1fr}.steps-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:900px){.header-row{min-height:70px}.nav-toggle{display:inline-flex;margin-left:auto}.primary-nav{position:absolute;left:20px;right:20px;top:74px;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.primary-nav.is-open{display:flex}.primary-nav a{padding:11px 12px}.search-open{display:none}.hero-grid,.page-hero__grid,.article-header__grid,.editorial-grid,.route-grid,.image-text,.two-col,.closing-grid,.prose-grid,.article-layout,.contact-grid{grid-template-columns:1fr}.hero-media{max-width:700px}.editorial-aside,.info-panel,.sticky-note,.contact-card{position:static}.image-text--reverse figure{order:0}.route-grid{gap:34px}.route-grid h2{font-size:36px}.split-heading{grid-template-columns:1fr;gap:8px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-grid nav:last-child{grid-column:auto}.article-sidebar{order:-1}.article-layout{gap:24px}.topic-band{grid-template-columns:1fr}.topic-band img{max-width:480px}.callout{align-items:flex-start;flex-direction:column}.guide-row{grid-template-columns:180px 1fr 70px}}
@media (max-width:700px){.container{width:min(calc(100% - 28px),var(--max))}.brand-copy small{display:none}.brand img{width:42px;height:42px}.hero{padding-top:36px}.hero h1,.page-hero h1,.article-header h1{font-size:38px}.hero-lead{font-size:16px}.hero-points{grid-template-columns:1fr}.section{padding:58px 0}.section--tight{padding-top:28px}.topic-grid,.article-list--two,.faq-grid,.info-grid,.steps-grid{grid-template-columns:1fr}.guide-row{grid-template-columns:1fr;gap:5px}.guide-row em{text-align:left}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{flex-direction:column}.search-form__row,.inline-search div{flex-direction:column}.search-modal__panel{padding:26px 20px}.route-steps a{grid-template-columns:48px 1fr}.page-hero{padding-top:30px}.page-hero img,.article-header img{max-height:340px}.verification-box{align-items:flex-start;flex-direction:column}.search-page h1{font-size:36px}.article-body{font-size:16px}.article-body h2{font-size:26px}.article-header{padding-bottom:30px}.callout,.error-box{padding:24px}.error-box h1{font-size:38px}}
@media (max-width:420px){.brand-copy strong{font-size:15px}.nav-toggle{padding:8px 10px}.hero h1,.page-hero h1,.article-header h1{font-size:34px}.hero-actions .button{width:100%}.button-group .button{width:100%}.topic-card__body{padding:17px}.article-card h3{font-size:20px}.section-heading h2,.image-text h2,.topic-band h2{font-size:29px}.route-grid h2{font-size:30px}.footer-bottom{margin-top:30px}.contact-card h2{font-size:22px}}