:root{
  --se-ink:#0b1220;
  --se-muted:#64748b;
  --se-soft:#f5f8fc;
  --se-card:#ffffff;
  --se-line:#e7edf4;
  --se-brand:#0ea5e9;
  --se-brand-2:#14b8a6;
  --se-brand-dark:#0369a1;
  --se-shadow:0 18px 50px rgba(15,23,42,.08);
  --se-shadow-lg:0 26px 80px rgba(15,23,42,.12);
  --se-radius:22px;
  --se-grad:linear-gradient(135deg,#0ea5e9 0%,#14b8a6 100%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--se-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button,input{font:inherit}
.se-shell{width:min(1180px,calc(100% - 40px));margin:0 auto}
.se-sitebar{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(231,237,244,.92);background:rgba(255,255,255,.86);backdrop-filter:blur(18px)}
.se-sitebar-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.se-brandmark{display:inline-flex;align-items:center;gap:11px;font-weight:900;letter-spacing:-.35px}
.se-brandmark-dot{width:14px;height:14px;border-radius:5px;background:var(--se-grad);box-shadow:0 7px 20px rgba(14,165,233,.28)}
.se-brandmark span:last-child{color:#334155;font-weight:700}
.se-nav{display:flex;align-items:center;gap:10px}
.se-nav a{padding:10px 13px;border-radius:12px;color:#475569;font-size:14px;font-weight:750;transition:.18s ease}
.se-nav a:hover,.se-nav a[aria-current="page"]{background:#f1f5f9;color:#0f172a}
.se-hero{padding:72px 0 42px;background:radial-gradient(circle at 14% 18%,rgba(14,165,233,.10),transparent 28%),radial-gradient(circle at 86% 12%,rgba(20,184,166,.09),transparent 30%),linear-gradient(180deg,#fbfdff 0%,#fff 100%)}
.se-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;color:#0284c7;font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.se-eyebrow:before{content:"";width:28px;height:2px;border-radius:99px;background:var(--se-grad)}
.se-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:48px;align-items:end}
.se-hero h1{max-width:780px;margin:0;font-size:clamp(42px,6vw,76px);line-height:.99;letter-spacing:-.055em;font-weight:900}
.se-hero h1 em{font-style:normal;background:var(--se-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.se-hero-copy{margin:22px 0 0;max-width:680px;color:#64748b;font-size:clamp(16px,1.6vw,19px);line-height:1.8}
.se-search-card{padding:20px;border:1px solid var(--se-line);border-radius:20px;background:rgba(255,255,255,.92);box-shadow:var(--se-shadow)}
.se-search-label{display:block;margin-bottom:9px;color:#334155;font-size:13px;font-weight:850}
.se-search{display:flex;align-items:center;gap:10px;border:1px solid #dbe4ef;border-radius:15px;padding:5px 5px 5px 14px;background:#fff;transition:.18s ease}
.se-search:focus-within{border-color:rgba(14,165,233,.62);box-shadow:0 0 0 4px rgba(14,165,233,.09)}
.se-search svg{width:19px;height:19px;color:#94a3b8;flex:0 0 auto}
.se-search input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#0f172a;padding:10px 0;font-size:15px}
.se-search button{border:0;border-radius:11px;padding:10px 14px;background:#0f172a;color:#fff;font-size:13px;font-weight:850;cursor:pointer}
.se-search-hint{display:flex;justify-content:space-between;gap:12px;margin-top:10px;color:#94a3b8;font-size:12px}
.se-search-hint kbd{padding:2px 7px;border:1px solid #dce4ee;border-bottom-width:2px;border-radius:6px;background:#f8fafc;color:#64748b;font:inherit;font-weight:800}
.se-main{padding:18px 0 84px}
.se-topics{display:flex;align-items:center;gap:9px;overflow-x:auto;padding:10px 0 28px;scrollbar-width:none}
.se-topics::-webkit-scrollbar{display:none}
.se-chip{flex:0 0 auto;padding:9px 13px;border:1px solid #e2e8f0;border-radius:999px;background:#fff;color:#475569;font-size:13px;font-weight:800;transition:.18s ease}
.se-chip:hover{border-color:#cbd5e1;color:#0f172a;transform:translateY(-1px)}
.se-chip.is-active{border-color:#0f172a;background:#0f172a;color:#fff}
.se-section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:6px 0 20px}
.se-section-head h2{margin:0;font-size:24px;letter-spacing:-.025em}
.se-section-head p{margin:0;color:#94a3b8;font-size:13px}
.se-featured{display:grid;grid-template-columns:1.12fr .88fr;overflow:hidden;margin-bottom:44px;border:1px solid var(--se-line);border-radius:28px;background:#fff;box-shadow:var(--se-shadow-lg)}
.se-featured-media{position:relative;min-height:430px;background:#eaf1f7;overflow:hidden}
.se-featured-media img{width:100%;height:100%;min-height:430px;object-fit:cover;display:block;transition:transform .45s ease}
.se-featured:hover .se-featured-media img{transform:scale(1.025)}
.se-placeholder{display:grid;place-items:center;width:100%;height:100%;min-height:280px;background:linear-gradient(135deg,#0f172a,#0f3a4a);color:#fff;font-weight:900;letter-spacing:.04em}
.se-featured-body{display:flex;flex-direction:column;justify-content:center;padding:clamp(28px,4vw,54px)}
.se-meta{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:15px;color:#64748b;font-size:12px;font-weight:800}
.se-topic-tag{display:inline-flex;align-items:center;padding:6px 9px;border-radius:999px;background:#ecfeff;color:#0f766e;font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}
.se-featured h2{margin:0 0 16px;font-size:clamp(30px,4vw,48px);line-height:1.08;letter-spacing:-.04em}
.se-featured p{margin:0 0 24px;color:#64748b;font-size:16px;line-height:1.75}
.se-readmore{display:inline-flex;align-items:center;gap:9px;width:max-content;color:#0f172a;font-weight:900}
.se-readmore span{display:grid;place-items:center;width:31px;height:31px;border-radius:999px;background:#0f172a;color:#fff;transition:.18s ease}
.se-readmore:hover span{transform:translateX(3px);background:#0284c7}
.se-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.se-card{overflow:hidden;border:1px solid var(--se-line);border-radius:22px;background:#fff;box-shadow:0 10px 34px rgba(15,23,42,.055);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.se-card:hover{transform:translateY(-4px);border-color:#d6e0eb;box-shadow:0 18px 48px rgba(15,23,42,.10)}
.se-card-media{display:block;aspect-ratio:16/9;overflow:hidden;background:#eef3f8}
.se-card-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}
.se-card:hover .se-card-media img{transform:scale(1.04)}
.se-card .se-placeholder{min-height:100%}
.se-card-body{padding:20px}
.se-card h3{margin:0 0 12px;font-size:20px;line-height:1.32;letter-spacing:-.024em}
.se-card h3 a:hover{color:#0284c7}
.se-card p{margin:0 0 18px;color:#64748b;font-size:14px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.se-card-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#94a3b8;font-size:12px;font-weight:750}
.se-card-footer a{color:#0f172a;font-weight:900}
.se-empty{padding:54px 24px;border:1px dashed #cbd5e1;border-radius:24px;background:#f8fafc;text-align:center;color:#64748b}
.se-empty h3{margin:0 0 8px;color:#0f172a}
.se-pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:42px}
.se-page-link,.se-page-current{display:grid;place-items:center;min-width:42px;height:42px;padding:0 12px;border:1px solid #e2e8f0;border-radius:12px;background:#fff;color:#475569;font-size:13px;font-weight:850}
.se-page-link:hover{border-color:#cbd5e1;color:#0f172a}.se-page-current{border-color:#0f172a;background:#0f172a;color:#fff}
.se-result-note{margin:-12px 0 24px;color:#64748b;font-size:14px}

/* detail */
.se-progress{position:fixed;left:0;top:0;z-index:100;height:3px;width:0;background:var(--se-grad);box-shadow:0 2px 10px rgba(14,165,233,.28)}
.se-detail-wrap{padding:40px 0 80px}
.se-detail-back{display:inline-flex;align-items:center;gap:8px;margin-bottom:22px;color:#64748b;font-size:13px;font-weight:800}.se-detail-back:hover{color:#0f172a}
.se-detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start}
.se-article{min-width:0}
.se-article-head{padding:8px 0 26px}
.se-article h1{max-width:900px;margin:12px 0 16px;font-size:clamp(38px,5.2vw,64px);line-height:1.04;letter-spacing:-.05em}
.se-article-lead{max-width:800px;margin:0 0 18px;color:#64748b;font-size:18px;line-height:1.75}
.se-article-info{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:#64748b;font-size:13px;font-weight:750}
.se-article-hero{overflow:hidden;margin:8px 0 30px;border:1px solid var(--se-line);border-radius:24px;background:#edf3f8;box-shadow:var(--se-shadow)}
.se-article-hero img{width:100%;aspect-ratio:16/8.8;object-fit:cover;display:block}
.se-content{font-size:17.5px;line-height:1.88;color:#27364a}
.se-content p{margin:0 0 22px}
.se-content h2,.se-content h3{scroll-margin-top:96px;color:#0f172a;letter-spacing:-.03em}
.se-content h2{margin:46px 0 17px;font-size:31px;line-height:1.23}.se-content h3{margin:34px 0 14px;font-size:23px;line-height:1.3}
.se-content ul,.se-content ol{margin:0 0 24px;padding-left:25px}.se-content li{margin-bottom:9px}.se-content strong{color:#0f172a}.se-content a{color:#0284c7;text-decoration:underline;text-decoration-color:rgba(2,132,199,.25);text-underline-offset:3px}.se-content blockquote{margin:30px 0;padding:20px 22px;border-left:4px solid #0ea5e9;border-radius:0 16px 16px 0;background:#f0f9ff;color:#334155}.se-content img{display:block;max-width:100%;height:auto;margin:30px auto;border-radius:18px;box-shadow:var(--se-shadow)}
.se-sidebar{position:sticky;top:98px;display:grid;gap:16px}
.se-side-card{padding:20px;border:1px solid var(--se-line);border-radius:18px;background:#fff;box-shadow:0 10px 34px rgba(15,23,42,.055)}
.se-side-title{margin:0 0 12px;font-size:14px;font-weight:900;letter-spacing:.02em}
.se-toc{display:grid;gap:2px}.se-toc a{display:block;padding:8px 9px;border-radius:9px;color:#64748b;font-size:12.5px;line-height:1.4;font-weight:720;transition:.15s ease}.se-toc a[data-level="3"]{padding-left:20px}.se-toc a:hover,.se-toc a.is-active{background:#f1f5f9;color:#0f172a}.se-toc a.is-active{box-shadow:inset 2px 0 #0ea5e9}
.se-help-card{background:#0f172a;color:#fff;border-color:#0f172a}.se-help-card .se-side-title{font-size:20px}.se-help-card p{margin:0 0 16px;color:#cbd5e1;font-size:13px;line-height:1.7}.se-help-btn{display:inline-flex;align-items:center;justify-content:center;width:100%;padding:12px 14px;border-radius:11px;background:#fff;color:#0f172a;font-size:13px;font-weight:900}
.se-share{display:flex;gap:8px}.se-share a{display:grid;place-items:center;width:38px;height:38px;border:1px solid #e2e8f0;border-radius:11px;color:#475569;transition:.16s ease}.se-share a:hover{transform:translateY(-2px);border-color:#cbd5e1;color:#0f172a}.se-share svg{width:17px;height:17px}
.se-preview-banner{margin-bottom:20px;padding:12px 15px;border:1px solid #fcd34d;border-radius:12px;background:#fffbeb;color:#92400e;font-size:13px;font-weight:800}
.se-related{margin-top:58px;padding-top:34px;border-top:1px solid var(--se-line)}.se-related h2{margin:0 0 20px;font-size:25px;letter-spacing:-.03em}.se-related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.se-related-card{overflow:hidden;border:1px solid var(--se-line);border-radius:16px;background:#fff}.se-related-card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.se-related-card .se-placeholder{min-height:130px}.se-related-card div:last-child{padding:14px}.se-related-card h3{margin:0 0 7px;font-size:15px;line-height:1.35}.se-related-card span{color:#94a3b8;font-size:11px;font-weight:750}
.se-article-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:42px;padding-top:26px;border-top:1px solid var(--se-line)}.se-article-bottom a{font-size:13px;font-weight:850;color:#475569}.se-article-bottom a:hover{color:#0f172a}

@media(max-width:980px){.se-hero-grid{grid-template-columns:1fr;gap:30px}.se-featured{grid-template-columns:1fr}.se-featured-media,.se-featured-media img{min-height:300px}.se-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.se-detail-layout{grid-template-columns:1fr}.se-sidebar{position:static;grid-template-columns:1fr 1fr}.se-side-card:first-child{grid-column:1/-1}.se-related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.se-shell{width:min(100% - 24px,1180px)}.se-sitebar-inner{min-height:62px}.se-brandmark span:last-child{display:none}.se-nav a:not(:last-child){display:none}.se-hero{padding:48px 0 28px}.se-hero h1{font-size:clamp(40px,12vw,58px)}.se-search-card{padding:15px}.se-main{padding-bottom:60px}.se-featured{border-radius:21px;margin-bottom:34px}.se-featured-media,.se-featured-media img{min-height:240px}.se-featured-body{padding:24px}.se-featured h2{font-size:31px}.se-grid{grid-template-columns:1fr;gap:16px}.se-card{border-radius:18px}.se-card-body{padding:17px}.se-section-head{align-items:start;flex-direction:column;gap:5px}.se-detail-wrap{padding-top:24px}.se-article h1{font-size:clamp(36px,11vw,49px)}.se-article-lead{font-size:16px}.se-article-hero{border-radius:18px}.se-content{font-size:16.5px}.se-content h2{font-size:27px}.se-content h3{font-size:21px}.se-sidebar{grid-template-columns:1fr}.se-side-card:first-child{grid-column:auto}.se-related-grid{grid-template-columns:1fr}.se-article-bottom{align-items:flex-start;flex-direction:column}.se-search-hint span:last-child{display:none}}