:root{--page:#F6F5F1;--surface:#FFFFFF;--surface-soft:#EDEFEA;--ink:#202A28;--muted:#596560;--primary:#23665D;--primary-dark:#184B44;--accent:#B27A46;--line:#D9DEDA;--footer:#1B302D}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--page);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}img{max-width:100%;height:auto;display:block}[hidden]{display:none!important}a{color:var(--primary);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--primary-dark)}button,a{touch-action:manipulation}.skip-link{position:absolute;left:-9999px;top:8px;background:#fff;padding:10px 14px;z-index:100}.skip-link:focus{left:12px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{max-width:1180px;height:68px;margin:auto;padding:0 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h2{font-size:24px;line-height:1.35;margin:0 0 18px}.section h3{font-size:18px;margin:22px 0 8px}.section p{margin:0 0 16px}.section .lead{color:var(--muted)}.kicker-row{display:flex;gap:10px;align-items:center;margin-bottom:10px}.kicker-row:before{content:"";width:28px;height:2px;background:var(--accent)}.method-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}.method-list a{padding:18px 14px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}.method-list a+ a{border-left:1px solid var(--line)}.method-list strong,.method-list span{display:block}.method-list span{color:var(--muted);font-size:14px;margin-top:4px}.three-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.note{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px}.editorial-list{display:grid;grid-template-columns:1.3fr .7fr;gap:30px}.main-read{border-top:2px solid var(--primary);padding-top:14px}.short-reads a{display:block;padding:12px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.guide-items{display:grid;gap:10px}.guide-items div{background:#fff;padding:14px 16px;border-radius:10px;border:1px solid var(--line)}.mobile-entry{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:center}.mobile-copy{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start}.end-index{display:grid;grid-template-columns:1fr 1fr;gap:30px;border-top:1px solid var(--line);padding-top:22px}.end-index a{display:block;padding:6px 0}.page-head{padding:38px 0 22px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:8px}.breadcrumbs a{color:var(--muted)}.page-intro{max-width:760px;color:var(--muted);margin:0}.head-rule{height:1px;background:var(--line);margin-top:24px}.article-section{margin:0 0 34px}.article-section h2{font-size:24px;line-height:1.4;margin:0 0 14px}.article-section 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@media(max-width:360px){.brand-name{max-width:112px;overflow:hidden;text-overflow:ellipsis}.mobile-subgrid{grid-template-columns:1fr}.actions{display:grid}.btn{justify-content:center}.hero h1,.page-head h1{font-size:26px}}