:root{--sr-ink:#17202a;--sr-muted:#64707d;--sr-line:#e4e8ec;--sr-surface:#fff;--sr-soft:#f5f7f8;--sr-accent:#0d6b62;--sr-accent-deep:#084f49;--sr-warm:#f0e7dc;--sr-radius:14px;--sr-shell:1180px}.sr-shell{width:min(calc(100% - 36px),var(--sr-shell));margin-inline:auto}.sr-site-header{background:#fff;border-bottom:1px solid var(--sr-line);position:relative;z-index:50}.sr-topbar{background:var(--sr-ink);color:#fff;font-size:12px}.sr-topbar-inner{min-height:34px;display:flex;align-items:center;justify-content:space-between}.sr-topbar a{color:#fff;text-decoration:none}.sr-header-main{display:flex;align-items:center;gap:30px;min-height:86px}.sr-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--sr-ink);flex:0 0 auto}.sr-brand-mark{display:grid;place-items:center;width:43px;height:43px;border-radius:11px;background:var(--sr-accent);color:#fff;font-weight:800;letter-spacing:-1px}.sr-brand-copy{display:flex;flex-direction:column;line-height:1.05}.sr-brand-copy strong{font-size:18px}.sr-brand-copy small{margin-top:5px;color:var(--sr-muted);font-size:11px}.sr-primary-nav{margin-left:auto}.sr-nav-list{display:flex;align-items:center;gap:22px;list-style:none;margin:0;padding:0}.sr-nav-list a{font-size:14px;font-weight:650;color:var(--sr-ink);text-decoration:none}.sr-nav-list a:hover{color:var(--sr-accent)}.sr-menu-toggle{display:none;border:1px solid var(--sr-line);background:#fff;border-radius:9px;padding:9px 12px}.sr-main{min-height:60vh}.sr-hero{padding:64px 0;background:linear-gradient(120deg,#f6f4ef 0%,#eef5f3 100%);border-bottom:1px solid var(--sr-line)}.sr-hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr);gap:58px;align-items:center}.sr-eyebrow,.sr-kicker{font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--sr-accent)}.sr-hero h1{font-size:clamp(38px,5vw,64px);line-height:1.01;letter-spacing:-.045em;margin:14px 0 20px;color:var(--sr-ink);max-width:790px}.sr-hero-copy p{font-size:18px;line-height:1.7;color:var(--sr-muted);max-width:700px}.sr-selector-panel{background:#fff;padding:28px;border:1px solid var(--sr-line);border-radius:18px;box-shadow:0 18px 55px rgba(18,37,35,.08)}.sr-selector-panel h2{margin:0 0 6px;font-size:24px}.sr-selector-panel>p{margin:0 0 20px;color:var(--sr-muted)}.sr-section{padding:62px 0}.sr-section-muted{background:var(--sr-soft);border-block:1px solid var(--sr-line)}.sr-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}.sr-section-head h2{font-size:34px;letter-spacing:-.03em;margin:5px 0 0}.sr-section-head>a{font-weight:700;color:var(--sr-accent);text-decoration:none}.sr-card-grid{display:grid;gap:16px}.sr-card-grid-4{grid-template-columns:repeat(4,1fr)}.sr-topic-card,.sr-driver-card{display:block;background:#fff;border:1px solid var(--sr-line);border-radius:var(--sr-radius);padding:22px;color:var(--sr-ink);text-decoration:none;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.sr-topic-card:hover,.sr-driver-card:hover{transform:translateY(-3px);border-color:#b7c9c6;box-shadow:0 14px 32px rgba(25,44,40,.07)}.sr-topic-index{display:inline-flex;color:var(--sr-accent);font-weight:800;font-size:12px}.sr-topic-card h3,.sr-driver-card h3{font-size:19px;margin:18px 0 8px}.sr-topic-card p,.sr-driver-card p{color:var(--sr-muted);line-height:1.55;font-size:14px;min-height:65px}.sr-card-link,.sr-driver-card span{font-weight:750;color:var(--sr-accent);font-size:13px}.sr-driver-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.sr-driver-card{background:#fff}.sr-post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.sr-post-card{border:1px solid var(--sr-line);border-radius:var(--sr-radius);overflow:hidden;background:#fff}.sr-post-thumb{display:block;aspect-ratio:16/9;background:#eef1f2}.sr-post-thumb img{width:100%;height:100%;object-fit:cover}.sr-no-image{width:100%;height:100%;display:grid;place-items:center;color:var(--sr-muted);font-weight:800;letter-spacing:.08em;text-transform:uppercase}.sr-post-body{padding:18px}.sr-post-meta{font-size:12px;color:var(--sr-muted)}.sr-post-card h3,.sr-post-card h2{font-size:19px;line-height:1.25;margin:8px 0}.sr-post-card h3 a,.sr-post-card h2 a{color:var(--sr-ink);text-decoration:none}.sr-post-card p{font-size:14px;color:var(--sr-muted);line-height:1.5}.sr-empty-state{padding:28px;border:1px dashed #cdd5d8;border-radius:var(--sr-radius);background:#fafbfb;color:var(--sr-muted)}.sr-site-footer{background:#121a20;color:#c9d0d5;margin-top:30px}.sr-footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:48px;padding:48px 0}.sr-footer-title{display:block;color:#fff;margin-bottom:14px}.sr-footer-links,.sr-footer-links ul{list-style:none;margin:0;padding:0}.sr-footer-links a{color:#c9d0d5;text-decoration:none}.sr-footer-bottom{border-top:1px solid #27313a;padding:18px 0;font-size:13px}.sr-article{padding:42px 0 70px}.sr-article-shell{max-width:1120px}.sr-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--sr-muted);margin-bottom:24px}.sr-breadcrumb a{color:var(--sr-accent);text-decoration:none}.sr-article-header{max-width:850px}.sr-article-header h1{font-size:clamp(34px,4vw,54px);line-height:1.06;letter-spacing:-.035em;margin:0 0 12px}.sr-article-meta{color:var(--sr-muted);font-size:13px}.sr-answer-box{max-width:850px;background:#eef7f5;border-left:4px solid var(--sr-accent);padding:18px 20px;border-radius:0 12px 12px 0;margin:28px 0}.sr-answer-box p{margin:5px 0 0}.sr-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start}.sr-article-content{font-size:17px;line-height:1.8}.sr-article-content h2{font-size:29px;letter-spacing:-.025em;margin-top:42px}.sr-article-content table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--sr-line);border-radius:10px;overflow:hidden}.sr-article-content th,.sr-article-content td{padding:12px;border-bottom:1px solid var(--sr-line);text-align:left}.sr-article-content th{background:var(--sr-soft)}.sr-article-aside{position:sticky;top:24px}.sr-source-note{margin-top:40px;padding:20px;border:1px solid var(--sr-line);border-radius:12px;background:#fafbfb}.sr-source-note p{margin:6px 0}.sr-source-note a{color:var(--sr-accent);font-weight:700}.sr-archive-head{margin-bottom:28px}.sr-archive-head h1{font-size:42px;margin:8px 0}.sr-archive-desc{max-width:760px;color:var(--sr-muted)}
@media(max-width:980px){.sr-card-grid-4{grid-template-columns:repeat(2,1fr)}.sr-driver-grid{grid-template-columns:repeat(2,1fr)}.sr-hero-grid{grid-template-columns:1fr}.sr-article-layout{grid-template-columns:1fr}.sr-article-aside{position:static}.sr-primary-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--sr-line);padding:18px}.sr-primary-nav.is-open{display:block}.sr-nav-list{flex-direction:column;align-items:flex-start}.sr-menu-toggle{display:block;margin-left:auto}.sr-header-main{gap:14px}}@media(max-width:680px){.sr-shell{width:min(calc(100% - 24px),var(--sr-shell))}.sr-topbar span{display:none}.sr-topbar-inner{justify-content:flex-end}.sr-header-main{min-height:72px}.sr-brand-copy small{display:none}.sr-hero{padding:42px 0}.sr-hero-grid{gap:30px}.sr-hero h1{font-size:39px}.sr-hero-copy p{font-size:16px}.sr-selector-panel{padding:20px}.sr-section{padding:44px 0}.sr-section-head{align-items:flex-start}.sr-section-head h2{font-size:29px}.sr-section-head>a{display:none}.sr-card-grid-4,.sr-driver-grid,.sr-post-grid{grid-template-columns:1fr}.sr-topic-card p{min-height:0}.sr-footer-grid{grid-template-columns:1fr;gap:24px}.sr-article{padding-top:28px}.sr-article-header h1{font-size:36px}}
.sr-section-compact{padding:34px 0 10px}.sr-driver-card{padding:0;overflow:hidden}.sr-driver-main{display:block;padding:22px;color:var(--sr-ink);text-decoration:none}.sr-driver-main h3{margin-top:0}.sr-driver-links{display:flex;flex-wrap:wrap;gap:7px;padding:0 22px 20px}.sr-driver-links a{font-size:11px;font-weight:700;color:var(--sr-accent-deep);background:#eef5f3;border:1px solid #d8e7e4;padding:6px 9px;border-radius:999px;text-decoration:none}.sr-driver-links a:hover{background:#e4f0ed}.sr-driver-card:hover{transform:none}.sr-driver-main:hover h3{color:var(--sr-accent)}
.sr-topbar .search-form{display:flex;align-items:center;gap:6px}.sr-topbar .search-form label{margin:0}.sr-topbar .search-field{width:150px;height:26px;border:1px solid #40505c;border-radius:4px;background:#202b33;color:#fff;padding:0 8px;font-size:12px}.sr-topbar .search-submit{height:26px;border:0;border-radius:4px;background:#fff;color:var(--sr-ink);font-size:11px;font-weight:800;padding:0 10px;cursor:pointer}