:root{--ink:#1e2a32;--mut:#5b6b75;--brand:#1d5fae;--brand-d:#144a87;--bg:#f6f8fb;--card:#fff;--line:#e3e9e7}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:99;border-radius:0 0 8px 0}
.skip:focus{left:0;color:#fff}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.site{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;box-shadow:0 1px 4px rgba(20,40,50,.05)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px 14px;padding-top:14px;padding-bottom:14px}
.logo{font-size:22px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:9px}
.logo:hover{text-decoration:none}
.logo img{width:28px;height:28px;border-radius:6px}
.logo span{color:var(--brand)}
nav{display:flex;flex-wrap:wrap}
nav a{margin-left:22px;color:var(--mut);font-weight:600;font-size:15px;padding:4px 0}
nav a:hover,nav a[aria-current]{color:var(--brand)}
.hero{background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;padding:64px 0}
.hero h1{font-size:40px;line-height:1.15;max-width:700px;margin-bottom:14px;letter-spacing:-.5px}
.hero p{font-size:19px;opacity:.92;max-width:640px}
.hero .btn{display:inline-block;margin-top:24px;background:#fff;color:var(--brand-d);font-weight:700;padding:13px 26px;border-radius:8px}
.hero .btn:hover{text-decoration:none;transform:translateY(-1px)}
main{padding:44px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;display:flex;flex-direction:column;transition:box-shadow .15s,border-color .15s}
.card:hover{box-shadow:0 6px 18px rgba(20,40,50,.08);border-color:#cfd9d6}
.card .thumb{margin:-22px -22px 16px;border-radius:12px 12px 0 0;overflow:hidden;aspect-ratio:16/9;background:var(--bg)}
.card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.card h3{font-size:19px;line-height:1.35;margin-bottom:8px}
.card h3 a{color:var(--ink)}.card h3 a:hover{color:var(--brand);text-decoration:none}
.card .meta{color:var(--mut);font-size:13px;margin-bottom:10px}
.card p{color:var(--mut);font-size:15px;flex:1}
.card a.more{margin-top:14px;font-weight:700;font-size:14px}
article.post{max-width:740px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:40px}
article.post h1{font-size:33px;line-height:1.2;margin-bottom:8px;letter-spacing:-.4px}
article.post .meta{color:var(--mut);font-size:14px;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
article.post h2{font-size:24px;margin:32px 0 12px;scroll-margin-top:90px}article.post h3{font-size:20px;margin:26px 0 10px;scroll-margin-top:90px}
article.post p{margin-bottom:16px}
article.post ul,article.post ol{margin:0 0 16px 24px}
article.post img{max-width:100%;height:auto;border-radius:8px}
article.post blockquote{border-left:4px solid var(--brand);padding:10px 18px;color:var(--mut);margin:0 0 16px;background:var(--bg);border-radius:0 8px 8px 0}
article.post table{width:100%;border-collapse:collapse;margin-bottom:16px;font-size:15px}
article.post th,article.post td{border:1px solid var(--line);padding:8px 10px;text-align:left}
article.post th{background:var(--bg)}
nav.toc{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:0 0 26px}
nav.toc strong{font-size:14px;text-transform:uppercase;letter-spacing:.6px;color:var(--mut)}
nav.toc ol{margin:8px 0 0 20px;font-size:15px}
nav.toc li{margin:3px 0}
section.related{max-width:740px;margin:34px auto 0}
section.related h2{font-size:20px;margin-bottom:12px}
section.related ul{list-style:none}section.related li{padding:10px 0;border-bottom:1px solid var(--line)}
.pagehead{padding:34px 0 8px}.pagehead h1{font-size:32px}.pagehead h2{font-size:26px}.pagehead p{color:var(--mut);margin-top:6px}
.crumbs{font-size:13px;color:var(--mut);padding-top:20px}.crumbs a{color:var(--mut)}.crumbs a:hover{color:var(--brand)}
.crumbs-top{font-size:13px;color:var(--mut);margin-bottom:18px}.crumbs-top a{color:var(--mut)}.crumbs-top a:hover{color:var(--brand)}
.chip{display:inline-block;margin:0 8px 8px 0;padding:6px 14px;background:var(--card);border:1px solid var(--line);border-radius:20px;font-size:14px;font-weight:600;color:var(--ink)}
.chip:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
footer.site{background:var(--ink);color:#c7d2d8;margin-top:50px;padding:38px 0 30px;font-size:14px}
footer.site a{color:#9fe3d4}
footer.site .ftop{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer.site .ftopics{margin-top:20px;padding-top:18px;border-top:1px solid #32434d}
footer.site .ftopics a{display:inline-block;margin:0 16px 6px 0}
footer.site .flegal{margin-top:18px;color:#8fa1ab;font-size:13px}
.faq dt{font-weight:700;margin-top:18px}.faq dd{color:var(--mut);margin:6px 0 0}
.saleband{background:#fdf6e3;border:1px solid #eadf9b;border-radius:12px;padding:22px;margin-top:34px}
.form p{margin-bottom:14px}
.form label{font-weight:600;font-size:15px}
.form input,.form textarea{width:100%;padding:11px;border:1px solid #d5dedb;border-radius:8px;font:inherit;margin-top:5px;background:#fff}
.form input:focus,.form textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(20,120,100,.12)}
.form button{background:var(--brand);color:#fff;border:0;padding:13px 30px;border-radius:8px;font-weight:700;font-size:16px;cursor:pointer}
.form button:hover{background:var(--brand-d)}
.hp{position:absolute;left:-9999px;top:-9999px;height:1px;width:1px;overflow:hidden}
.sentok{background:#e8f6ef;border:1px solid #b8e2cd;color:#175c3a;padding:12px 16px;border-radius:8px;margin-bottom:18px}
.senterr{background:#fdecea;border:1px solid #f5c6c0;color:#8a2a20;padding:12px 16px;border-radius:8px;margin-bottom:18px}
.smcols{columns:2;column-gap:40px}
.smcols li{break-inside:avoid;margin-bottom:5px;list-style:none}
@media(max-width:640px){.hero{padding:44px 0}.hero h1{font-size:29px}article.post{padding:24px}.smcols{columns:1}nav a{margin-left:14px;font-size:14px}}