:root{--navy:#0f2a4d;--red:#c1272d;--blue:#2563eb;--ink:#1a2433;--mut:#5b6b7f;--bg:#f7f8fa;--card:#fff;--line:#e3e8ef}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}
a{color:var(--blue)}
.site-header{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--navy);color:#fff;position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:20px}
.brand img{border-radius:50%;background:#fff}
.brand em{color:#ff8a8a;font-style:normal}
.site-header nav{display:flex;flex-wrap:wrap;gap:16px}
.site-header nav a{color:#dbe6f5;text-decoration:none;font-size:15px}
.site-header nav a:hover{color:#fff;text-decoration:underline}
main{max-width:1100px;margin:0 auto;padding:24px 20px 60px}
footer{max-width:1100px;margin:0 auto;padding:24px 20px 40px;color:var(--mut);font-size:14px;border-top:1px solid var(--line)}
h1{font-size:32px;line-height:1.2;margin:8px 0 12px}
h2{font-size:24px;margin:28px 0 10px}
h3{font-size:18px;margin:0 0 6px}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;padding:8px 0 20px}
.hero h1{font-size:40px}
.lede{font-size:18px;color:#33415a}
.hero-note{background:#fff4e5;border:1px solid #f0c98a;padding:10px 14px;border-radius:8px;font-size:14px}
.hero-img{width:100%;border-radius:12px;display:block}
.calculator{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;margin:24px 0}
.calculator form{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.calculator label{display:block;font-size:14px;font-weight:600}
.calculator input,.calculator select{width:100%;padding:10px;margin-top:4px;border:1px solid #cbd5e1;border-radius:8px;font-size:15px}
.calc-result{margin-top:16px;background:#eef6ff;border:1px solid #bcd8ff;border-radius:8px;padding:14px}
.calc-result .save{font-size:22px;font-weight:800;color:#0a7a3d}
.calc-result .nosave{font-size:18px;font-weight:700;color:#8a1f24}
.formula{font-size:13px;color:var(--mut)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:16px 0}
.split>div{border-radius:12px;padding:18px}
.split .us{background:#eaf1fe;border:1px solid #bcd0f5}
.split .cn{background:#fdecec;border:1px solid #f3b8b8}
.big-price{font-size:26px;font-weight:800;margin:6px 0}
.btn{display:inline-block;background:var(--red);color:#fff;padding:10px 16px;border-radius:8px;text-decoration:none;font-weight:700;margin:4px 6px 4px 0}
.btn:hover{background:#9c1e23}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:inherit;display:block}
a.card:hover{border-color:var(--blue);box-shadow:0 2px 10px rgba(0,0,0,.08)}
.cat-img{width:100%;height:140px;object-fit:cover;border-radius:8px;margin-bottom:10px}
.price-row{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;margin:6px 0}
.price-row .cn{font-weight:700;color:var(--red)}
.price-row strong{font-size:18px}
.price-row .usd{color:var(--mut)}
.unit{font-size:14px;color:#33415a;margin:4px 0}
.src{font-size:13px;color:var(--mut)}
.us-missing{font-size:14px;background:#fff4e5;border:1px solid #f0c98a;border-radius:6px;padding:8px 10px}
.flags{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.tag{font-size:12px;font-weight:700;padding:3px 8px;border-radius:20px;background:#eef2f7}
.tag-est{background:#eef2f7;color:#33415a}
.tag-warn{background:#fdecec;color:#8a1f24}
.flag{background:#fff4e5;border:1px solid #f0c98a;border-radius:8px;padding:10px 12px}
.flag.warn{background:#fdecec;border-color:#f3b8b8}
.verified-box{background:#e6f7ec;border:1px solid #9adbb0;border-radius:8px;padding:12px}
.verified-badge{display:inline-block;background:#0a7a3d;color:#fff;font-weight:700;padding:4px 10px;border-radius:20px;font-size:13px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.cat-tile{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;text-decoration:none;color:inherit;display:block}
.cat-tile img{width:100%;height:110px;object-fit:cover;border-radius:8px}
.cat-tile span{display:block;font-weight:700;margin-top:8px}
.cat-tile small{color:var(--mut)}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}
.filters input[type=search]{flex:1;min-width:220px;padding:10px;border:1px solid #cbd5e1;border-radius:8px;font-size:15px}
.filters select{padding:10px;border:1px solid #cbd5e1;border-radius:8px}
.crumb{font-size:14px;color:var(--mut)}
table{width:100%;border-collapse:collapse}
td{padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}
.legend{font-size:14px}
@media(max-width:760px){.hero{grid-template-columns:1fr}.hero h1{font-size:30px}.split{grid-template-columns:1fr}h1{font-size:26px}}