:root{--brand:#0f3d3e;--soft:#e3efee;--bg:#f4f3ef;--card:#fff;--ink:#1c2425;--muted:#69726f;--line:#e2e0da;--ok:#1d8a4e;--okbg:#e6f5ec;--warn:#a86400;--warnbg:#fff4dd;--bad:#c0352b;--badbg:#fdecea}
*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI",system-ui,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.45}
a{color:#0b5cad}header.top{background:var(--brand);color:#fff;display:flex;align-items:center;gap:18px;padding:10px 20px;flex-wrap:wrap}
header.top b{font-size:17px}header.top nav{display:flex;gap:4px;flex-wrap:wrap;flex:1}header.top nav a{color:#dfeeee;text-decoration:none;padding:7px 12px;border-radius:8px}
header.top nav a.on,header.top nav a:hover{background:rgba(255,255,255,.14);color:#fff}header.top form{margin:0}
main{max-width:1150px;margin:0 auto;padding:20px}h1{font-size:24px;margin:4px 0 16px}h2{font-size:18px;margin:0 0 10px}
.card{background:var(--card);border-radius:12px;box-shadow:0 1px 2px rgba(0,0,0,.05),0 4px 14px rgba(0,0,0,.05);padding:16px 18px;margin-bottom:16px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}.stat .n{font-size:26px;font-weight:700}.stat .l{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse}th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:12px;color:var(--muted);text-transform:uppercase}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;cursor:pointer;text-decoration:none;font-weight:600}
.btn.p{background:var(--brand);color:#fff;border-color:var(--brand)}.btn.g{background:var(--ok);color:#fff;border-color:var(--ok)}.btn.r{color:var(--bad);border-color:#f1c4c0}.btn.sm{padding:5px 10px;font-size:13px}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:9px;background:#fff;width:100%}label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);font-weight:600}
.form{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form .full{grid-column:1/-1}.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.row>*{width:auto}
.msg{padding:10px 14px;border-radius:10px;margin-bottom:14px}.ok{background:var(--okbg);color:#145c35}.err{background:var(--badbg);color:#7e1f17}.warn{background:var(--warnbg);color:#6b4200}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:12px;font-weight:700}.t-ACTIVE{background:var(--okbg);color:var(--ok)}.t-EXPIRING,.t-GRACE{background:var(--warnbg);color:var(--warn)}.t-EXPIRED,.t-REVOKED,.t-SUSPENDED{background:var(--badbg);color:var(--bad)}
.t-PENDING{background:var(--warnbg);color:var(--warn)}.t-PAID{background:var(--okbg);color:var(--ok)}.t-CANCELLED{background:#eee;color:#777}
.mono{font-family:Consolas,monospace;font-weight:700;letter-spacing:.03em}.muted{color:var(--muted)}.small{font-size:13px}details summary{cursor:pointer;font-weight:600}
.center{max-width:460px;margin:8vh auto}.pub{max-width:760px;margin:0 auto;padding:24px 16px}.plans{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.plan{border:2px solid var(--line);border-radius:14px;padding:16px;background:#fff;cursor:pointer;text-align:left;font:inherit}.plan:hover{border-color:var(--brand)}.plan .price{font-size:22px;font-weight:800;color:var(--brand)}
.qrbox{display:grid;grid-template-columns:280px 1fr;gap:20px;align-items:center}.qrbox svg{width:100%;height:auto;background:#fff}@media(max-width:700px){.form,.qrbox{grid-template-columns:1fr}}
.copy{cursor:pointer}

/* --- trang giới thiệu: tính năng, hướng dẫn, liên hệ --- */
html{scroll-behavior:smooth}.pub h2[id],.pub section[id]{scroll-margin-top:12px}
.feats{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-bottom:22px}
.feat{display:flex;flex-direction:column;gap:2px;background:#fff;border:2px solid var(--line);border-radius:14px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.feat:hover{border-color:var(--brand)}.feat span{font-size:26px}.feat b{font-size:16px}.feat small{color:var(--muted)}
.guide h3{margin:0 0 8px;font-size:18px}.guide ul,.guide ol{margin:6px 0 10px;padding-left:22px}.guide li{margin:4px 0}
.lh{display:flex;gap:22px;align-items:center;flex-wrap:wrap;margin-top:22px}.lh-text{flex:1 1 280px}.lh-text p{margin:4px 0 12px}
.lh-name{font-size:19px;font-weight:800;margin-bottom:10px}.lh-btns{display:flex;gap:10px;flex-wrap:wrap}
.btn.lh-call{background:#0f5132;border-color:#0f5132;color:#fff}.btn.lh-zalo{background:#0068ff;border-color:#0068ff;color:#fff}
.lh .lh-btns .btn{font-size:16px;padding:10px 16px}
.lh-qr{flex:0 0 auto;text-align:center}.lh-qr svg{width:170px;height:170px;display:block;margin:0 auto 6px;background:#fff;border:1px solid var(--line);border-radius:10px}
@media(max-width:560px){.lh{flex-direction:column;text-align:center}.lh-btns{justify-content:center}}