:root{
  --brand:#B9473F;
  --amber:#D89A45;
  --ink:#1E2026;
  --paper:#F7F4EF;
  --soft:#EEE9E2;
  --text:#2B2D31;
  --muted:#6F706F;
  --accent:#E06A3B;
  --line:#D9D1C7;
  --white:#fff;
  --shadow:0 18px 52px rgba(30,32,38,.10);
  --radius:22px;
  --small-radius:14px;
  --max: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","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
body.modal-open{overflow:hidden}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#8f342e}
img{display:block;max-width:100%;height:auto;border-radius:var(--small-radius);object-fit:cover;background:var(--soft)}
button,input{font:inherit}
button{cursor:pointer}
code{padding:.08rem .36rem;border-radius:5px;background:var(--soft);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}
.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.section-pad{padding-top:72px;padding-bottom:72px}
.skip-link{position:fixed;left:12px;top:12px;z-index:9999;transform:translateY(-160%);background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px}
.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,244,239,.96);border-bottom:1px solid rgba(217,209,199,.9);backdrop-filter:blur(12px)}
.header-bar{min-height:78px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none;flex:0 0 auto}
.brand img{width:44px;height:44px;border-radius:10px}
.brand span{display:grid;line-height:1.25}
.brand strong{font-size:18px;letter-spacing:.03em}
.brand small{margin-top:3px;color:var(--muted);font-size:12px}
.primary-nav{margin-left:auto;display:flex;align-items:center;gap:3px}
.primary-nav a{padding:9px 10px;border-radius:9px;color:var(--text);font-size:14px;text-decoration:none;white-space:nowrap}
.primary-nav a:hover,.primary-nav a.is-active{background:var(--soft);color:var(--brand)}
.search-trigger,.menu-toggle{border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:10px;padding:8px 13px}
.search-trigger:hover,.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
.menu-toggle{display:none}
.search-modal[hidden]{display:none!important}
.search-modal{position:fixed;inset:0;z-index:100;background:rgba(30,32,38,.68);display:grid;place-items:start center;padding:11vh 20px 20px}
.search-panel{position:relative;width:min(650px,100%);padding:34px;background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow)}
.search-panel h2{margin:0 40px 8px 0;color:var(--ink)}
.search-panel p{margin:0 0 22px;color:var(--muted)}
.search-close{position:absolute;top:15px;right:15px;width:38px;height:38px;border:0;border-radius:50%;background:var(--soft);font-size:24px;line-height:1}
.search-row{display:flex;gap:10px}
.search-row input{min-width:0;flex:1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:12px 14px;color:var(--text)}
.search-row input:focus{outline:2px solid rgba(185,71,63,.22);border-color:var(--brand)}
.search-row button{border:0;background:var(--brand);color:#fff;border-radius:10px;padding:12px 18px;font-weight:700}
.eyebrow{margin:0 0 10px;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.lede{font-size:18px;line-height:1.85;color:#45464a}
.hero{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(380px,.98fr);align-items:center;gap:58px;padding-top:68px;padding-bottom:68px}
.hero-copy h1,.page-hero h1,.not-found h1{margin:0;color:var(--ink);font-size:clamp(36px,5vw,64px);line-height:1.08;letter-spacing:-.035em}
.hero-copy .lede{max-width:720px;margin:24px 0}
.hero-media{margin:0}
.hero-media img{aspect-ratio:1.46/1;box-shadow:var(--shadow)}
.hero-media figcaption{margin-top:11px;color:var(--muted);font-size:13px}
.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 17px;border-radius:11px;font-weight:750;text-decoration:none;border:1px solid transparent;transition:transform .18s ease,border-color .18s ease,background .18s ease}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:#9f3933;color:#fff}
.btn.secondary{background:transparent;border-color:var(--line);color:var(--ink)}
.btn.secondary:hover{border-color:var(--brand);color:var(--brand)}
.btn.text{padding-inline:0;border:0;color:var(--brand);justify-content:flex-start}
.btn.inverse{border-color:rgba(255,255,255,.36);color:#fff}
.inline-points{display:flex;gap:14px 26px;flex-wrap:wrap;padding:0;margin:27px 0 0;list-style:none;color:var(--muted);font-size:13px}
.inline-points li:before{content:"";display:inline-block;width:7px;height:7px;margin-right:8px;border-radius:50%;background:var(--amber)}
.route-strip{background:var(--ink);color:#e9e4dd}
.route-strip .shell{padding-top:17px;padding-bottom:17px}
.route-strip p{margin:0;font-size:14px}
.route-strip strong{color:#fff}
.route-strip a{color:#f1b463}
.section-head{max-width:780px;margin-bottom:34px}
.section-head h2,.split h2,.guide-banner h2,.cta-band h2,.about-band h2,.prose-grid h2,.prose-stack h2,.search-page h1{margin:0 0 12px;color:var(--ink);font-size:clamp(27px,3vw,40px);line-height:1.2;letter-spacing:-.025em}
.section-head p:not(.eyebrow),.split p,.guide-banner p,.cta-band p,.about-band p{color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.feature-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.feature-card{position:relative;min-height:270px;padding:27px 23px;border:1px solid var(--line);border-radius:var(--small-radius);background:rgba(255,255,255,.38)}
.feature-card .num{display:inline-block;margin-bottom:34px;color:var(--amber);font:800 12px/1 ui-monospace,monospace;letter-spacing:.1em}
.feature-card h3{margin:0 0 10px;color:var(--ink);font-size:20px}
.feature-card p{margin:0 0 20px;color:var(--muted);font-size:14px}
.feature-card a{display:inline-block;font-weight:700;font-size:14px}
.split-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f1ece5}
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:56px}
.split.compact{gap:42px}
.split figure,.editorial-row figure,.topic-layout figure{margin:0}
.split figure img,.editorial-row figure img,.topic-layout figure img{width:100%;aspect-ratio:1.45/1}
.text-links{display:grid;gap:10px;margin-top:22px}
.text-links a{font-weight:700;text-decoration:none}
.text-links a:after{content:" →"}
.editorial-row{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);gap:52px;align-items:center}
.check-list{display:grid;gap:0}
.check-list>div{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}
.check-list strong{color:var(--ink)}
.check-list span{color:var(--muted)}
.check-list.wide{max-width:900px}
.dark-section{background:var(--ink);color:#e7e2db}
.dark-section .section-head h2,.dark-section h2,.dark-section h3{color:#fff}
.dark-section p{color:#bab8b5}
.section-head.light .eyebrow,.dark-section .eyebrow{color:#f0ab52}
.tag-cloud{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 22px}
.tag-cloud a,.tag-cloud span{display:inline-flex;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.09);color:#f1ede8;text-decoration:none;font-size:13px}
.tag-cloud.plain span{background:var(--soft);color:var(--text)}
.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.article-card{overflow:hidden;border:1px solid var(--line);border-radius:var(--small-radius);background:#fff}
.article-card>img{width:100%;aspect-ratio:1.64/1;border-radius:0}
.article-card>div{padding:20px}
.article-card h2,.article-card h3{margin:9px 0 9px;color:var(--ink);font-size:19px;line-height:1.45}
.article-card h2 a,.article-card h3 a{color:inherit;text-decoration:none}
.article-card p{margin:0 0 17px;color:var(--muted);font-size:14px}
.pill{display:inline-flex;padding:4px 8px;border-radius:999px;background:#f2e1dc;color:#91362f;font-size:12px;font-weight:750}
.read-link{font-weight:750;text-decoration:none}
.center{text-align:center;margin-top:34px}
.soft-section{background:var(--soft)}
.topic-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:start}
.topic-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #d1c9c0}
.topic-list article{padding:20px 20px 20px 0;border-bottom:1px solid #d1c9c0}
.topic-list article:nth-child(even){padding-left:20px;border-left:1px solid #d1c9c0}
.topic-list h3{margin:0 0 7px;color:var(--ink);font-size:18px}
.topic-list p{margin:0 0 12px;color:var(--muted);font-size:14px}
.topic-list a{font-size:13px;font-weight:750;text-decoration:none}
.guide-banner{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:42px;padding:36px;border-radius:var(--radius);background:#f0e4d6}
.guide-banner img{width:100%;aspect-ratio:1.44/1}
.faq-list{display:grid;gap:10px;max-width:900px}
.faq-list.large{max-width:960px;margin-inline:auto}
.faq-list details{border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.55)}
.faq-list summary{list-style:none;cursor:pointer;padding:17px 52px 17px 18px;color:var(--ink);font-weight:750;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:18px;top:12px;font-size:24px;color:var(--brand)}
.faq-list details[open] summary:after{content:"–"}
.faq-list details p{margin:0;padding:0 18px 19px;color:var(--muted)}
.about-band{padding:72px 0;background:#e8ded2;border-top:1px solid #d9cec2}
.page-hero{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:54px;padding-top:62px;padding-bottom:44px}
.page-hero h1{font-size:clamp(34px,4.4vw,54px)}
.page-hero .lede{margin:20px 0 0}
.page-hero>img{width:100%;aspect-ratio:1.48/1;box-shadow:var(--shadow)}
.breadcrumbs{display:flex;gap:9px;align-items:center;padding-top:14px;padding-bottom:14px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.compare-grid>article{padding:28px;border:1px solid var(--line);border-radius:var(--small-radius);background:rgba(255,255,255,.42)}
.compare-grid h2,.compare-grid h3{margin:0 0 12px;color:var(--ink);font-size:23px}
.compare-grid p,.compare-grid li{color:var(--muted)}
.compare-grid ul{padding-left:20px;margin-bottom:0}
.step-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.step-list>li{display:grid;grid-template-columns:62px 1fr;gap:22px;padding:24px 0;border-bottom:1px solid var(--line)}
.step-list>li>span{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}
.step-list h3{margin:0 0 5px;color:var(--ink);font-size:19px}
.step-list p{margin:0;color:var(--muted)}
.list-stack{display:grid;border-top:1px solid var(--line)}
.list-stack article{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;padding:22px 0;border-bottom:1px solid var(--line)}
.list-stack h2,.list-stack h3{margin:7px 0 6px;color:var(--ink);font-size:20px}
.list-stack h2 a,.list-stack h3 a{color:inherit;text-decoration:none}
.list-stack p{margin:0;color:var(--muted);max-width:760px}
.cta-band{padding:54px 0;background:#e3d4c6;border-top:1px solid #d3c2b2}
.cta-band .shell{max-width:950px}
.topic-section+ .topic-section{border-top:1px solid var(--line)}
.empty-state{margin:32px 0;padding:30px;border:1px dashed #c9beb3;border-radius:var(--small-radius);background:rgba(255,255,255,.4)}
.empty-state h2{margin-top:0;color:var(--ink)}
.article-head{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:62px;padding-bottom:38px}
.article-title h1{margin:10px 0 17px;color:var(--ink);font-size:clamp(34px,4.3vw,54px);line-height:1.14;letter-spacing:-.03em}
.article-head>img{width:100%;aspect-ratio:1.46/1;box-shadow:var(--shadow)}
.meta-line{margin:19px 0 0;color:var(--muted);font-size:13px}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(220px,1fr);gap:62px;align-items:start}
.article-body section{margin:0 0 38px}
.article-body h2{margin:0 0 14px;color:var(--ink);font-size:27px;line-height:1.35}
.article-body p{margin:0 0 14px;font-size:17px;line-height:1.95}
.article-next{margin-top:50px;padding:28px;border-radius:var(--small-radius);background:var(--soft)}
.article-next h2{font-size:25px}
.article-aside{display:grid;gap:16px;position:sticky;top:104px}
.aside-card{padding:20px;border:1px solid var(--line);border-radius:var(--small-radius);background:rgba(255,255,255,.45)}
.aside-card h2{margin:0 0 13px;color:var(--ink);font-size:16px}
.aside-card>a{display:block;padding:10px 0;border-top:1px solid var(--line);font-size:13px;font-weight:700;text-decoration:none}
.prose-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.prose-grid>div{padding:26px;border:1px solid var(--line);border-radius:var(--small-radius);background:rgba(255,255,255,.38)}
.prose-grid h2{font-size:23px}
.prose-grid p,.prose-stack p{color:var(--muted)}
.prose-stack{max-width:900px}
.prose-stack>section{padding:22px 0;border-bottom:1px solid var(--line)}
.prose-stack h2{font-size:24px}
.search-page{max-width:980px}
.search-inline{margin:28px 0 38px;max-width:760px}
.search-inline>label{display:block;margin-bottom:8px;font-weight:750}
.result-count{color:var(--muted);margin-bottom:16px}
.not-found{min-height:58vh;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
.not-found .lede{max-width:700px}
.site-footer{background:var(--ink);color:#d7d3cd}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:34px;padding-top:54px;padding-bottom:44px}
.footer-grid section{display:flex;flex-direction:column;align-items:flex-start}
.footer-grid h2{margin:0 0 12px;color:#fff;font-size:16px}
.footer-grid p{margin:0;color:#aaa9a7;font-size:13px;max-width:340px}
.footer-grid a{padding:5px 0;color:#cfcbc5;text-decoration:none;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:18px;padding-bottom:20px;border-top:1px solid rgba(255,255,255,.11);font-size:12px;color:#908f8d}
.footer-bottom p{margin:0}
.footer-bottom button{border:0;background:transparent;color:#d0cdc8}
@media (max-width:1100px){
  .header-bar{gap:14px}.primary-nav a{padding-inline:7px;font-size:13px}.brand small{display:none}
  .feature-grid{grid-template-columns:1fr 1fr}.article-grid{grid-template-columns:1fr 1fr}
  .hero{grid-template-columns:1fr 1fr;gap:36px}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-grid section:last-child{grid-column:2/4}
}
@media (max-width:900px){
  .site-header{position:relative}.header-bar{min-height:70px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.menu-toggle{display:inline-flex;margin-left:auto}.search-trigger{order:3}
  .primary-nav{display:none;order:4;width:100%;margin:0;padding:10px 0 4px;border-top:1px solid var(--line);flex-wrap:wrap}.primary-nav.is-open{display:flex}.primary-nav a{font-size:14px}
  .hero,.page-hero,.article-head,.split,.editorial-row,.topic-layout,.guide-banner{grid-template-columns:1fr}.hero{gap:30px}.hero-media{order:-1}.hero-media img,.page-hero>img,.article-head>img{max-height:440px}
  .page-hero>img{order:-1}.article-head>img{order:-1}.article-layout{grid-template-columns:1fr}.article-aside{position:static;grid-template-columns:1fr 1fr}
  .topic-layout{gap:30px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid section:last-child{grid-column:auto}
}
@media (max-width:700px){
  .shell{width:min(calc(100% - 28px),var(--max))}.section-pad{padding-top:52px;padding-bottom:52px}
  .hero{padding-top:32px;padding-bottom:48px}.hero-copy h1,.page-hero h1,.not-found h1{font-size:36px}.page-hero{gap:26px;padding-top:32px}.article-head{gap:28px;padding-top:32px}
  .lede{font-size:16px}.feature-grid,.feature-grid.three,.article-grid,.compare-grid,.prose-grid,.footer-grid{grid-template-columns:1fr}
  .feature-card{min-height:auto}.topic-list{grid-template-columns:1fr}.topic-list article:nth-child(even){padding-left:0;border-left:0}
  .list-stack article{grid-template-columns:1fr;gap:11px}.list-stack .read-link{justify-self:start}.check-list>div{grid-template-columns:1fr;gap:4px}
  .article-aside{grid-template-columns:1fr}.article-body p{font-size:16px}.article-layout{gap:40px}.article-body h2{font-size:24px}
  .footer-bottom{align-items:flex-start}.search-row{flex-direction:column}.search-row button{width:100%}.search-panel{padding:28px 20px}
  .guide-banner{padding:24px}.inline-points{display:grid;gap:8px}.breadcrumbs{overflow:auto;white-space:nowrap}
}
@media (max-width:400px){
  .shell{width:min(calc(100% - 22px),var(--max))}.brand strong{font-size:16px}.brand img{width:38px;height:38px}.search-trigger,.menu-toggle{padding:7px 10px}
  .hero-copy h1,.page-hero h1,.not-found h1{font-size:32px}.section-head h2,.split h2,.guide-banner h2,.cta-band h2,.about-band h2,.prose-grid h2,.prose-stack h2,.search-page h1{font-size:27px}
  .actions{align-items:stretch}.actions .btn{width:100%}.step-list>li{grid-template-columns:48px 1fr;gap:14px}.step-list>li>span{width:40px;height:40px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}