:root{
  --bg:#f6f8fb; --card:#fff; --ink:#1f2733; --muted:#6b7785; --line:#e6ebf1;
  --brand:#2f6df6; --brand-d:#1f4fc4; --pro:#f0883e; --ok:#1faa59; --shadow:0 2px 10px rgba(20,40,80,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.muted{color:var(--muted)} .small{font-size:13px}

/* Header */
.site-head{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;box-shadow:var(--shadow)}
.head-inner{display:flex;align-items:center;gap:18px;height:60px}
.brand{font-weight:800;font-size:20px;color:var(--ink)}
.nav{display:flex;gap:18px;flex:1}
.nav a{color:var(--ink);font-weight:600}
.head-right{display:flex;align-items:center;gap:10px}
.lang-switch select{padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:#fff}
.ui-toggle{padding:6px 12px;border:1px solid var(--line);border-radius:8px;color:var(--muted);font-size:13px;white-space:nowrap}

/* Hero / sections */
.hero{padding:46px 0 28px;text-align:center}
.hero h1{font-size:38px;margin:0 0 12px;line-height:1.2}
.hero p{font-size:17px;color:var(--muted);max-width:680px;margin:0 auto 22px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn{display:inline-block;padding:11px 22px;border-radius:10px;font-weight:700;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-d)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-pro{background:var(--pro);color:#fff}
.btn-sm{padding:7px 14px;font-size:14px}

/* Cards grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);transition:.15s}
.card:hover{transform:translateY(-2px);border-color:#cdd9ec}
.card .ico{font-size:30px}
.card h3{margin:8px 0 4px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14px;min-height:40px}
.card .meta{margin-top:10px;display:flex;justify-content:space-between;align-items:center}
.badge{font-size:12px;padding:2px 8px;border-radius:20px;font-weight:700}
.badge.free{background:#e8f6ee;color:var(--ok)}
.badge.pro{background:#fdeee2;color:var(--pro)}

.section-title{font-size:22px;margin:30px 0 6px}
.section-sub{color:var(--muted);margin:0 0 8px}

/* Tool page */
.tool-head{display:flex;align-items:center;gap:14px;margin:24px 0 6px}
.tool-head .ico{font-size:40px}
.tool-head h1{margin:0;font-size:26px}
.tool-form{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:14px 0;box-shadow:var(--shadow)}
.tool-form label{display:block;font-weight:600;margin:12px 0 4px;font-size:14px}
.tool-form input,.tool-form select,.tool-form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;background:#fff}
.tool-form .row{display:flex;gap:12px}
.tool-form .row>div{flex:1}
.result{background:#f0f7ff;border:1px solid #cfe2ff;border-radius:12px;padding:16px;margin-top:14px;display:none}
.result.show{display:block}
table.tbl{width:100%;border-collapse:collapse;margin-top:8px}
table.tbl th,table.tbl td{border:1px solid var(--line);padding:8px 10px;text-align:left;font-size:14px}
table.tbl th{background:#f3f6fb}
.svgbox{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px;overflow:auto;max-width:100%}
.svgbox svg{max-width:100%}

/* Ads */
.ad-slot{margin:18px 0;border:1px dashed #d8dee8;border-radius:10px;padding:14px;text-align:center;color:var(--muted);font-size:13px;background:#fbfcfe}
.ad-slot ins{display:block}

/* Footer */
.site-foot{background:var(--card);border-top:1px solid var(--line);margin-top:40px;padding:24px 0;font-size:13px}

/* Forms (auth/account) */
.center-box{max-width:420px;margin:60px auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px;box-shadow:var(--shadow)}
.center-box h1{margin:0 0 16px;font-size:22px}
.center-box label{display:block;margin:12px 0 4px;font-weight:600}
.center-box input{padding:10px 12px;width:100%;border:1px solid var(--line);border-radius:9px}
.center-box .btn{width:100%;margin-top:16px}

/* Feedback */
.feedback{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin:18px 0}
.feedback .stars{font-size:20px;cursor:pointer}
.comment{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.comment .av{width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.comment .who{font-weight:700}
.comment .when{color:var(--muted);font-size:12px}

/* Pay */
.pay-box{max-width:480px;margin:50px auto;text-align:center}
.qr{width:240px;height:240px;margin:16px auto}
.gateway-tabs{display:flex;gap:10px;justify-content:center;margin:14px 0}
.gw{padding:10px 18px;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-weight:600}
.gw.active{background:var(--brand);color:#fff;border-color:var(--brand)}

/* Admin */
.admin-layout{display:flex;gap:20px;margin-top:20px}
.admin-side{width:200px;flex:none}
.admin-side a{display:block;padding:10px 12px;border-radius:8px;color:var(--ink);font-weight:600}
.admin-side a:hover{background:#eef3fb}
.admin-main{flex:1;min-width:0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.stat .n{font-size:26px;font-weight:800}
.stat .l{color:var(--muted);font-size:13px}
table.admin{width:100%;border-collapse:collapse}
table.admin th,table.admin td{border:1px solid var(--line);padding:8px;font-size:13px}
table.admin th{background:#f3f6fb}

/* H5 (mobile) mode: compact */
.ui-h5 .grid{grid-template-columns:repeat(2,1fr);gap:10px}
.ui-h5 .hero{padding:26px 0 14px}
.ui-h5 .hero h1{font-size:26px}
.ui-h5 .nav{gap:10px;font-size:13px}
.ui-h5 .card p{min-height:0}
.ui-h5 .stat-grid{grid-template-columns:repeat(2,1fr)}
.ui-h5 .admin-layout{flex-direction:column}
.ui-h5 .admin-side{width:100%;display:flex;gap:8px;flex-wrap:wrap}

.flash{background:#fff4e5;border:1px solid #ffd8a8;color:#8a4b00;padding:10px 14px;border-radius:10px;margin:14px 0}
.notice{background:#eef3fb;border:1px solid #cfe2ff;color:#1f4fc4;padding:12px 14px;border-radius:10px;margin:14px 0}

/* Cookie consent banner */
.cookie-banner{position:fixed;left:0;right:0;bottom:0;z-index:100;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -4px 20px rgba(20,40,80,.12);padding:16px 18px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.cookie-banner[hidden]{display:none}
.cookie-text{flex:1;min-width:260px;font-size:14px;color:var(--ink);line-height:1.6}
.cookie-text a{color:var(--brand);text-decoration:underline}
.cookie-actions{display:flex;gap:10px;flex:none}
@media(max-width:600px){
  .cookie-banner{flex-direction:column;align-items:stretch}
  .cookie-actions{justify-content:flex-end}
  .ui-h5 .cookie-actions .btn{flex:1}
}

/* Ad slots & promotions */
.adslot{margin:18px 0}
.adslot-sidebar{position:sticky;top:14px}
.promo-card{background:linear-gradient(135deg,#eef4ff,#f7f0ff);border:1px solid var(--line);
  border-radius:12px;padding:16px 18px}
.promo-card .promo-title{font-weight:700;font-size:16px;margin-bottom:6px}
.promo-card .promo-text{color:var(--muted);font-size:14px;margin:0 0 12px}
.aff-card{display:flex;gap:12px;align-items:center;text-decoration:none;color:inherit;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px;transition:.15s}
.aff-card:hover{border-color:var(--brand);box-shadow:0 2px 10px rgba(20,40,80,.08)}
.aff-card img{width:64px;height:64px;object-fit:cover;border-radius:8px;flex:none}
.aff-title{font-weight:600;font-size:15px}
.aff-blurb{margin:4px 0 0;color:var(--muted);font-size:13px}

/* Admin forms */
.chk{display:flex;align-items:center;gap:8px;margin:8px 0;font-weight:500}
.chk input[type=checkbox]{width:16px;height:16px}
.admin textarea,.admin input[type=text]{width:100%;box-sizing:border-box}
.card h2{font-size:18px;margin:0 0 8px}
.card h3{font-size:15px;margin:16px 0 6px}

/* Payment: QR + trade no */
.trade-form{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.trade-form input{flex:1;min-width:180px}

/* Legal pages */
.legal{max-width:820px;margin:0 auto;padding:30px 0 10px}
.legal h1{font-size:28px;margin:0 0 16px}
.legal h2{font-size:18px;margin:22px 0 6px}
.legal p{margin:0 0 14px;color:var(--ink)}
.legal .updated{color:var(--muted);font-size:13px;margin-bottom:18px}