/* bagi.com.vn — CSS dùng chung cho trang con (09/10/2026, SEO mở rộng). Cùng bảng màu/phông với trang chủ. */
:root{--nen:#07080c;--nen2:#0d0f15;--the:#12151d;--vien:rgba(255,255,255,.08);--chu:#e8eaf0;--mo:#9aa1b2;--do:#ff2d3d;--do2:#c4121f;--xanh:#2e8bff;--xanh2:#67b6ff;--max:1200px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--nen);color:var(--chu);font-family:'Be Vietnam Pro',system-ui,sans-serif;font-weight:400;line-height:1.7;overflow-x:hidden}
img,video,svg{max-width:100%;display:block}
img{height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.hep{max-width:780px}
.nho{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--mo)}
.gach{width:56px;height:4px;background:var(--do);border-radius:2px;margin:14px 0 22px;box-shadow:0 0 18px var(--do)}
.do-chu{color:var(--do)}.xanh-chu{color:var(--xanh2)}
/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(7,8,12,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--vien)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
nav .logo img{height:30px;width:auto}
nav ul{display:flex;gap:26px;list-style:none;font-size:14px;color:var(--mo)}
nav ul a:hover,nav ul a[aria-current]{color:#fff}
.menu-dt{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer}
.nut{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:10px;font-weight:600;font-size:15px;transition:.25s;cursor:pointer;border:1px solid transparent}
.nut.do{background:linear-gradient(135deg,var(--do),var(--do2));color:#fff;box-shadow:0 8px 30px rgba(255,45,61,.3)}
.nut.do:hover{transform:translateY(-2px)}
.nut.vien{border-color:rgba(255,255,255,.25);color:#fff;background:rgba(255,255,255,.03)}
.nut.vien:hover{border-color:#fff}
.nut.nho2{padding:8px 15px;font-size:13px}
/* đường dẫn */
.duong{font-size:13px;color:var(--mo);padding:22px 0 0}
.duong ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.duong li+li::before{content:'›';margin-right:6px;color:#555b6b}
.duong a:hover{color:#fff}
/* đầu trang con */
.dau-trang{position:relative;padding:46px 0 56px;overflow:hidden}
.dau-trang::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 80% 20%,rgba(46,139,255,.12),transparent 55%),radial-gradient(ellipse at 10% 90%,rgba(255,45,61,.08),transparent 50%);pointer-events:none;z-index:-1}
.dau-trang h1{font-family:'Chakra Petch',sans-serif;font-size:clamp(32px,5vw,58px);line-height:1.08;font-weight:700;margin:10px 0 16px}
.dau-trang .mota{color:#c3c8d4;font-size:18px;max-width:760px}
.dau-trang .luoi{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.minh-hoa{position:relative;border-radius:24px;border:1px solid var(--vien);background:radial-gradient(circle at 50% 40%,rgba(46,139,255,.22),transparent 62%),linear-gradient(180deg,#0f1625,#090b12);aspect-ratio:1/1;display:grid;place-items:center;overflow:hidden}
.minh-hoa svg{width:58%;height:auto;color:var(--xanh2);filter:drop-shadow(0 0 22px rgba(103,182,255,.45))}
.minh-hoa img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.minh-hoa .nhan{position:absolute;left:16px;bottom:14px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--mo)}
.huy{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border-radius:999px;border:1px solid rgba(255,45,61,.5);color:#ff6b77;font-size:12px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:6px}
.huy::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--do);box-shadow:0 0 12px var(--do);animation:nhay 1.4s infinite}
@keyframes nhay{50%{opacity:.25}}
/* khối */
section{padding:64px 0}
section.toi{background:linear-gradient(180deg,var(--nen),var(--nen2))}
h2.tieu{font-family:'Chakra Petch',sans-serif;font-size:clamp(26px,3.4vw,38px);line-height:1.15;margin-bottom:12px}
.dan{color:var(--mo);max-width:720px;margin-bottom:30px}
.luoi3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.luoi2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.the{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));border:1px solid var(--vien);border-radius:16px;padding:24px;transition:.3s;position:relative;overflow:hidden}
a.the:hover,.the.noi:hover{border-color:rgba(255,45,61,.45);transform:translateY(-3px)}
.the::before{content:'';position:absolute;top:0;right:18px;width:22px;height:2px;background:var(--do)}
.the h3{font-size:18px;margin-bottom:6px;line-height:1.35}
.the p{font-size:14.5px;color:var(--mo)}
.the .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(46,139,255,.1);color:var(--xanh2);margin-bottom:14px}
.the .ico svg{width:26px;height:26px}
.the .xem{display:inline-block;margin-top:12px;font-size:13.5px;color:var(--xanh2)}
.the .anh{margin:-24px -24px 18px;aspect-ratio:16/9;overflow:hidden;background:#0d1320}
.the .anh img{width:100%;height:100%;object-fit:cover;transition:transform 1s}
a.the:hover .anh img{transform:scale(1.05)}
.the em{font-style:normal;font-size:11px;letter-spacing:.2em;color:var(--xanh2);text-transform:uppercase}
/* nội dung bài */
.bai{font-size:17px;color:#d6dae4}
.bai h2{font-family:'Chakra Petch',sans-serif;font-size:clamp(24px,3vw,32px);line-height:1.2;color:#fff;margin:44px 0 14px}
.bai h3{font-size:20px;color:#fff;margin:28px 0 10px}
.bai p{margin:0 0 16px}
.bai ul,.bai ol{margin:0 0 18px 22px}
.bai li{margin:6px 0}
.bai strong{color:#fff}
.bai a{color:var(--xanh2);border-bottom:1px solid rgba(103,182,255,.35)}
.bai a:hover{border-color:var(--xanh2)}
.bai blockquote{border-left:3px solid var(--do);padding:6px 0 6px 18px;margin:22px 0;color:#c3c8d4;font-style:italic}
.bai figure{margin:26px 0;border-radius:16px;overflow:hidden;border:1px solid var(--vien)}
.bai figcaption{font-size:13px;color:var(--mo);padding:10px 14px;background:rgba(255,255,255,.02)}
.bai table{width:100%;border-collapse:collapse;margin:10px 0 22px;font-size:15px}
.bai th,.bai td{border:1px solid var(--vien);padding:10px 12px;text-align:left;vertical-align:top}
.bai th{background:rgba(255,255,255,.04);color:#fff}
.bang-cuon{overflow-x:auto}
.meta-bai{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--mo);margin-top:6px}
.muc-luc{border:1px solid var(--vien);border-radius:14px;padding:18px 22px;margin:8px 0 30px;background:rgba(255,255,255,.02);font-size:15px}
.muc-luc b{display:block;margin-bottom:6px;color:#fff}
.muc-luc ol{margin-left:20px}
.muc-luc a{color:var(--mo);border:0}.muc-luc a:hover{color:#fff}
.ghi-chu{border:1px solid rgba(103,182,255,.3);background:rgba(46,139,255,.06);border-radius:14px;padding:16px 20px;font-size:15px;color:#c9d6ea;margin:22px 0}
/* hỏi đáp */
.hd{display:grid;gap:12px;max-width:900px}
.hd details{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));border:1px solid var(--vien);border-radius:14px;padding:18px 22px}
.hd summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.hd summary::-webkit-details-marker{display:none}
.hd summary h3{font-size:16px;font-weight:600}
.hd summary::after{content:"+";color:var(--xanh2);font-size:22px;line-height:1}
.hd details[open] summary::after{content:"–"}
.hd details p{color:var(--mo);margin-top:10px}
/* kêu gọi */
.goi{border:1px solid var(--vien);border-radius:22px;padding:40px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;background:radial-gradient(ellipse at 90% 10%,rgba(255,45,61,.12),transparent 55%),var(--nen2)}
.goi h2{font-family:'Chakra Petch',sans-serif;font-size:clamp(22px,2.8vw,30px);line-height:1.2}
.goi p{color:var(--mo);max-width:620px}
.nuts{display:flex;gap:12px;flex-wrap:wrap}
/* chân trang */
footer{border-top:1px solid var(--vien);padding:56px 0 28px;margin-top:40px;background:#05060a}
footer .luoi{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:30px}
footer .logo-ct{height:34px;width:auto;margin-bottom:14px}
footer h4{font-size:13px;margin-bottom:12px;color:#fff}
footer ul{list-style:none;font-size:13.5px;color:var(--mo);line-height:2.1}
footer ul a:hover{color:#fff}
.phap-ly{margin-top:36px;padding:16px 20px;border:1px solid var(--vien);border-radius:12px;font-size:13px;color:var(--mo);background:rgba(255,255,255,.02)}
.phap-ly b{color:#fff}
.cuoi{display:flex;justify-content:space-between;margin-top:22px;font-size:12px;color:#6b7183;flex-wrap:wrap;gap:10px}
video{width:100%;border-radius:18px;border:1px solid var(--vien);background:#000}
/* điện thoại */
@media (max-width:1000px){
 nav ul{display:none}.menu-dt{display:block}
 nav ul.mo{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:rgba(7,8,12,.97);padding:20px 24px;gap:16px;border-bottom:1px solid var(--vien)}
 .dau-trang .luoi{grid-template-columns:1fr}
 .minh-hoa{max-width:340px}
 .luoi3{grid-template-columns:1fr 1fr}
 footer .luoi{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
 .wrap{padding:0 16px}
 section{padding:48px 0}
 .luoi3,.luoi2{grid-template-columns:1fr}
 .bai{font-size:16.5px}
 .goi{padding:26px}
 footer .luoi{grid-template-columns:1fr}
 nav .nut.do{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.huy::before{animation:none}}