/* Kế Toán Gọn · Bản quyền © 2026 ThienNV – giao diện trang giới thiệu */
:root{--brand:#123c3a;--brand2:#1f5f5a;--acc:#c9822b;--acc-soft:#fbf1e3;--bg:#f6f4ef;--panel:#fff;--ink:#1d2523;--muted:#5f6b68;--line:#e2ddd2;--ok:#1f7a4d;--warn:#a76a00}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 "Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif}
a{color:var(--brand2)}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
h1{font-size:clamp(26px,4vw,40px);line-height:1.2;margin:.4em 0 .4em}
h2{font-size:clamp(21px,2.6vw,28px);line-height:1.25;margin:1.6em 0 .5em}
h3{font-size:19px;margin:1.2em 0 .4em}
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;min-height:60px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--brand);text-decoration:none;font-size:18px;margin-right:auto}
.logo span{background:var(--acc);color:#10302e;border-radius:8px;width:32px;height:32px;display:grid;place-items:center;font-size:14px}
.top nav{display:flex;gap:14px;flex-wrap:wrap}
.top nav a{color:var(--ink);text-decoration:none;font-weight:500}
.top nav a[aria-current]{color:var(--brand2);text-decoration:underline;text-underline-offset:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 18px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink);text-decoration:none;font-weight:600;cursor:pointer;font:inherit;font-weight:600}
.btn.sm{padding:6px 12px;font-size:14px}
.btn.pri{background:var(--brand);border-color:var(--brand);color:#fff}
.btn:hover{border-color:var(--brand2)}
.known{background:var(--acc-soft);border-bottom:1px solid var(--line);padding:8px 0;font-size:15px}
.known .wrap{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
main{padding-bottom:40px}
.crumbs{font-size:14px;color:var(--muted);margin-top:18px}.crumbs a{color:var(--muted)}
.lead{font-size:18px;color:#34413e;max-width:780px}
.meta{color:var(--muted);font-size:14px}
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center;padding:40px 0 10px}
.hero h1{font-size:clamp(30px,4.4vw,48px)}.hero em{font-style:normal;color:var(--acc)}
.eyebrow{color:var(--brand2);font-weight:700;margin:0;text-transform:uppercase;font-size:13px;letter-spacing:.06em}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.chips{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px}
.shot .win{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 20px 50px rgba(18,60,58,.15);overflow:hidden}
.shot .bar{background:var(--brand);padding:10px;display:flex;gap:6px}.shot .bar i{width:10px;height:10px;border-radius:50%;background:#ffffff55;display:block}
.shot .wbody{padding:14px;display:flex;flex-direction:column;gap:10px;font-size:14px}
.shot .ai{background:var(--acc-soft);border:1px solid var(--acc);border-radius:10px;padding:10px;display:flex;flex-direction:column}
.shot .ai span{color:var(--muted)}
.shot .it{border:1px solid var(--line);border-left:4px solid var(--ok);border-radius:8px;padding:8px 10px;display:flex;flex-direction:column}
.shot .it.warn{border-left-color:var(--warn)}.shot .it small{color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.steps div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:6px}
.steps span{color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:6px;transition:box-shadow .15s,border-color .15s}
.card:hover{border-color:var(--brand2);box-shadow:0 6px 20px rgba(18,60,58,.08)}
.card .ic{font-size:26px}.card span:last-child{color:var(--muted);font-size:14.5px}
.card time{color:var(--acc);font-size:13px;font-weight:600}
.prices{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:12px 0}
.price{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:6px}
.price.best{border:2px solid var(--acc);box-shadow:0 10px 30px rgba(201,130,43,.15)}
.price .amt{font-size:30px;font-weight:800;color:var(--brand)}.price .per{color:var(--muted);font-size:14px}
.checks{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:6px 20px}
.checks li::before{content:"✔ ";color:var(--ok);font-weight:700}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:8px 0}
.faq summary{font-weight:600;cursor:pointer}
.band{background:var(--brand);color:#fff;border-radius:16px;padding:26px;margin-top:36px}
.band h2{margin-top:0}.band a.btn{border-color:#fff}.band .btn:not(.pri){background:transparent;color:#fff}.band .btn.pri{background:var(--acc);border-color:var(--acc);color:#10302e}
.news{padding-left:18px}.news small{color:var(--muted)}
article table,.tool table{border-collapse:collapse;width:100%;margin:10px 0;background:#fff}
article th,article td{border:1px solid var(--line);padding:7px 10px;text-align:left}
article th{background:#efebe3}
.note{background:var(--acc-soft);border-left:4px solid var(--acc);padding:12px 14px;border-radius:8px;margin:16px 0}
.tool{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;margin:16px 0}
.tool .form{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.tool .f{display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--muted)}.tool .f.wide{grid-column:1/-1}
.tool input,.tool select,.tool textarea{font:inherit;font-size:16px;padding:9px 10px;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:#fff}
.tool .res td{border-bottom:1px solid #efebe3;padding:7px 4px}.tool .res td.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tool .res tr.b td{font-weight:700;color:var(--brand)}
.tool .big{font-size:20px;font-weight:600;color:var(--brand)}
.small{font-size:14px;color:var(--muted)}
footer{background:#10302e;color:#d7e5e2;padding:30px 0 16px;margin-top:40px;font-size:15px}
footer a{color:#d7e5e2;display:block;text-decoration:none;margin:3px 0}footer a:hover{text-decoration:underline}
.fcols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
.copy{border-top:1px solid #ffffff22;margin-top:18px;padding-top:12px;font-size:13px;opacity:.8}
.zalo{position:fixed;right:16px;bottom:16px;background:#0068ff;color:#fff;border-radius:999px;padding:12px 16px;font-weight:700;text-decoration:none;box-shadow:0 6px 20px rgba(0,0,0,.25);z-index:20}
@media (max-width:860px){.hero{grid-template-columns:1fr;padding-top:20px}.steps{grid-template-columns:1fr}.fcols{grid-template-columns:1fr 1fr}.top nav{order:3;width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px}.top nav a{white-space:nowrap}}
@media (max-width:520px){.fcols{grid-template-columns:1fr}.shot{display:none}}