/* HùngCPA AllInOne — website V2. Bảng màu lấy từ chính phần mềm (xanh CPA, nền kem). */
:root{
  --nen:#F6F5F0; --the:#FFFFFF; --muc:#20302A; --muc-nhat:#5C6B64; --vien:#E2E0D8;
  --chinh:#0E5A47; --chinh-dam:#0A4436; --chinh-nhat:#E4EFEA; --chinh-vien:#BCD6CC;
  --sidebar:#122E26; --vang:#9A6B14; --vang-nen:#FCF3DF; --gold:#D8C79A;
  --sb-chu:#B9CDC5; --sb-nhom:#8FD3BC;
  --bong:0 1px 2px rgba(32,48,42,.06),0 4px 14px rgba(32,48,42,.05);
  --bo:14px; --nav-h:68px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{margin:0;font-family:'Be Vietnam Pro','Segoe UI',system-ui,-apple-system,sans-serif;color:var(--muc);background:var(--nen);line-height:1.6;font-size:16px}
img{max-width:100%;height:auto}
a{color:var(--chinh)}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.skip{position:absolute;left:-999px;top:0;background:#fff;color:var(--muc);padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}

/* ---------- Thanh điều hướng ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(18,46,38,.97);color:var(--sb-chu-sang,#DCEFE7);backdrop-filter:blur(6px);height:var(--nav-h)}
.nav .wrap{display:flex;align-items:center;gap:20px;height:100%}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;letter-spacing:.2px}
.brand img{width:34px;height:34px;border-radius:8px}
.brand small{display:block;font-weight:400;font-size:12px;color:var(--sb-chu)}
.menu{display:flex;gap:4px;margin-left:auto;align-items:center}
.menu a{color:var(--sb-chu);text-decoration:none;padding:8px 12px;border-radius:8px;font-size:15px}
.menu a:hover{color:#fff;background:rgba(255,255,255,.08)}
.menu .btn{margin-left:8px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;border-radius:8px;padding:6px 10px;font-size:18px}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-family:inherit;font-size:16px;line-height:1.2}
.btn-chinh{background:var(--chinh);color:#fff}
.btn-chinh:hover{background:var(--chinh-dam)}
.btn-vang{background:var(--gold);color:#122E26}
.btn-vang:hover{background:#E8D9AE}
.btn-vien{background:transparent;border-color:var(--chinh);color:var(--chinh)}
.btn-vien:hover{background:var(--chinh-nhat)}
.btn-vien-sang{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-vien-sang:hover{background:rgba(255,255,255,.1)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid #E8C77A;outline-offset:2px}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(160deg,#122E26 0%,#0E4A3B 60%,#0E5A47 100%);color:#fff;padding:72px 0 64px}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero .nhan{display:inline-block;background:rgba(216,199,154,.16);border:1px solid rgba(216,199,154,.4);color:var(--gold);padding:4px 12px;border-radius:999px;font-size:14px;margin-bottom:16px}
.hero h1{font-size:clamp(30px,4.4vw,48px);line-height:1.15;margin:0 0 16px}
.hero h1 em{font-family:'Playfair Display',Georgia,serif;font-weight:500;color:var(--gold)}
.hero p{font-size:18px;color:var(--sb-chu);margin:0 0 24px;max-width:56ch}
.hero .nut{display:flex;flex-wrap:wrap;gap:12px}
.hero .gach{display:flex;flex-wrap:wrap;gap:8px 18px;margin:22px 0 0;padding:0;list-style:none;color:var(--sb-nhom);font-size:14.5px}
.hero .gach li::before{content:"✓ ";font-weight:700}
.bang{background:var(--the);color:var(--muc);border-radius:16px;box-shadow:0 24px 48px -24px rgba(0,0,0,.55);overflow:hidden}
.bang-dau{background:#122E26;color:var(--sb-chu);padding:10px 14px;font-size:13px;display:flex;gap:6px;align-items:center}
.bang-dau i{width:10px;height:10px;border-radius:50%;background:#37574c;display:inline-block}
.bang ul{list-style:none;margin:0;padding:14px 16px 18px}
.bang li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--vien);font-size:14.5px}
.bang li:last-child{border:0}
.bang b{color:var(--chinh)}

/* ---------- Khối chung ---------- */
section{padding:64px 0}
.nen-the{background:var(--the)}
.tieude{text-align:center;max-width:720px;margin:0 auto 36px}
.tieude .nho{color:var(--chinh);font-weight:700;font-size:14px;letter-spacing:.8px;text-transform:uppercase}
.tieude h2{font-size:clamp(25px,3.2vw,34px);line-height:1.25;margin:6px 0 10px}
.tieude p{color:var(--muc-nhat);margin:0}
.luoi{display:grid;gap:18px}
.luoi-3{grid-template-columns:repeat(3,1fr)}
.luoi-2{grid-template-columns:repeat(2,1fr)}
.luoi-4{grid-template-columns:repeat(4,1fr)}
.the{background:var(--the);border:1px solid var(--vien);border-radius:var(--bo);padding:22px;box-shadow:var(--bong)}
.nen-the .the{background:var(--nen)}
.the h3{margin:0 0 8px;font-size:18px}
.the p{margin:0;color:var(--muc-nhat);font-size:15.5px}

/* ---------- Nỗi đau → hỗ trợ ---------- */
.dau .nhan-dau{font-size:13px;font-weight:700;color:#B03A2E;text-transform:uppercase;letter-spacing:.6px}
.dau .nhan-giai{font-size:13px;font-weight:700;color:var(--chinh);text-transform:uppercase;letter-spacing:.6px;margin-top:12px}
.dau p+p{color:var(--muc)}

/* ---------- Tính năng (tab) ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:24px}
.tab{border:1px solid var(--chinh-vien);background:var(--the);color:var(--chinh);padding:9px 16px;border-radius:999px;cursor:pointer;font-family:inherit;font-size:15px;font-weight:600}
.tab[aria-selected="true"]{background:var(--chinh);color:#fff;border-color:var(--chinh)}
.tabpanel[hidden]{display:none}
.tabpanel .tom{max-width:760px;margin:0 auto 22px;text-align:center;color:var(--muc-nhat)}
.cn{display:flex;gap:12px}
.cn .dau-tich{flex:none;width:26px;height:26px;border-radius:50%;background:var(--chinh-nhat);color:var(--chinh);display:grid;place-items:center;font-weight:800;font-size:14px}
.cn h4{margin:0 0 4px;font-size:16.5px}
.cn p{margin:0;color:var(--muc-nhat);font-size:15px}

/* ---------- Ba bước ---------- */
.buoc{counter-reset:b}
.buoc .the{position:relative;padding-top:48px}
.buoc .the::before{counter-increment:b;content:counter(b);position:absolute;top:-16px;left:20px;width:38px;height:38px;border-radius:50%;background:var(--chinh);color:#fff;display:grid;place-items:center;font-weight:800}

/* ---------- Bảng giá ---------- */
.gia .the{display:flex;flex-direction:column}
.gia .the.noi-bat{border:2px solid var(--chinh);position:relative}
.gia .the.noi-bat::after{content:"Phổ biến";position:absolute;top:-13px;right:18px;background:var(--chinh);color:#fff;font-size:13px;font-weight:700;padding:2px 12px;border-radius:999px}
.gia .tien{font-size:34px;font-weight:800;color:var(--chinh);line-height:1.1;margin:10px 0 2px}
.gia .tien small{font-size:16px;font-weight:600;color:var(--muc-nhat)}
.gia ul{margin:14px 0 18px;padding-left:20px;color:var(--muc-nhat);font-size:15px;flex:1}
.ghi-chu{background:var(--vang-nen);border:1px solid #E8D3A4;color:#5d4410;border-radius:12px;padding:14px 18px;margin-top:22px;font-size:15px}

/* ---------- Tải về ---------- */
.tai{background:var(--sidebar);color:#fff}
.tai .tieude p,.tai .tieude .nho{color:var(--sb-nhom)}
.tai .khung{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px}
.tai dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:15px}
.tai dt{color:var(--sb-chu)}
.tai dd{margin:0;word-break:break-all}
.tai code{font-family:Consolas,ui-monospace,monospace;font-size:12.5px;color:var(--gold)}
.tai .yc{margin:0;padding-left:20px;color:var(--sb-chu);font-size:15px}
.smartscreen-minh-hoa{margin-top:16px;background:#103A5C;border:1px solid rgba(143,211,188,.35);border-radius:12px;padding:12px 14px;font-size:13.5px;color:#EAF4FC}
.smartscreen-minh-hoa .ss-dau{font-weight:700;color:#9FD3FF;font-size:12.5px;text-transform:uppercase;letter-spacing:.4px;margin-bottom:6px}
.smartscreen-minh-hoa .ss-buoc{display:flex;flex-direction:column;gap:4px}
.smartscreen-minh-hoa kbd{background:#fff;color:#103A5C;border-radius:4px;padding:1px 6px;font-family:inherit;font-weight:700;font-size:12.5px}

/* ---------- Cam kết, tác giả ---------- */
.tacgia{display:grid;grid-template-columns:260px 1fr;gap:32px;align-items:center}
.tacgia img{border-radius:18px;box-shadow:var(--bong)}
.chi-so{display:flex;flex-wrap:wrap;gap:24px;margin:16px 0}
.chi-so div{font-size:14px;color:var(--muc-nhat)}
.chi-so b{display:block;font-size:26px;color:var(--chinh);line-height:1.1}

/* ---------- FAQ ---------- */
details.hoi{background:var(--the);border:1px solid var(--vien);border-radius:12px;margin-bottom:10px;padding:0 18px}
details.hoi summary{cursor:pointer;padding:16px 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.hoi summary::after{content:"+";color:var(--chinh);font-size:22px;line-height:1}
details.hoi[open] summary::after{content:"–"}
details.hoi p{margin:0 0 16px;color:var(--muc-nhat)}

/* ---------- Liên hệ & chân trang ---------- */
.lien-he .khung{display:grid;grid-template-columns:1fr 240px;gap:28px;align-items:center;background:var(--the);border:1px solid var(--vien);border-radius:16px;padding:28px;box-shadow:var(--bong)}
.lien-he ul{list-style:none;margin:0;padding:0}
.lien-he li{padding:8px 0;border-bottom:1px solid var(--vien)}
.lien-he li:last-child{border:0}
footer{background:#0d211b;color:var(--sb-chu);padding:36px 0;font-size:14.5px}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px 40px;justify-content:space-between}
footer a{color:var(--sb-chu)}
.thanh-tai{display:none}

/* ---------- Trang chính sách ---------- */
.bai{max-width:820px;margin:0 auto;padding:48px 0 72px}
.bai h1{font-size:clamp(26px,3.4vw,36px);margin-top:0}
.bai h2{font-size:20px;margin:28px 0 6px}
.bai p{color:var(--muc)}

@media (max-width:900px){
  .hero .wrap,.tai .khung,.tacgia,.lien-he .khung{grid-template-columns:1fr}
  .luoi-3,.luoi-4{grid-template-columns:1fr 1fr}
  .menu{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:#122E26;flex-direction:column;align-items:stretch;padding:12px 16px;margin:0}
  .menu.mo{display:flex}
  .menu .btn{margin:6px 0 0;justify-content:center}
  .nav-toggle{display:block}
  .tacgia img{max-width:220px}
}
@media (max-width:620px){
  section{padding:48px 0}
  .luoi-2,.luoi-3,.luoi-4{grid-template-columns:1fr}
  .hero{padding:48px 0 44px}
  .thanh-tai{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;background:#122E26;color:#fff;padding:10px 16px;gap:12px;align-items:center;justify-content:space-between;box-shadow:0 -4px 16px rgba(0,0,0,.25)}
  body{padding-bottom:64px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}