/* =====================================================================
   CyberSoft Ứng dụng AI — /ung-dung-ai/ (nạp sau dn.min.css + vibe-code/assets/vc.css)
   Màu nhấn Claude #E07A4F. Hoạt ảnh chỉ transform/opacity/background-position; tôn trọng giảm chuyển động.
   ===================================================================== */
.trang-ud{--c:#E07A4F}
.trang-ud .hero,.trang-ud .vc-toi,.trang-ud .khoi.toi{background:radial-gradient(900px 560px at 85% -10%,rgba(224,122,79,.34),transparent 60%),
  radial-gradient(800px 500px at -10% 110%,rgba(124,92,255,.22),transparent 60%),linear-gradient(160deg,#0B1020 0%,#1A1230 55%,#0B1020 100%)}

/* ---------- Trước ↔ sau ---------- */
.ud-ts{display:grid;grid-template-columns:1fr 120px 1fr;gap:20px;align-items:stretch;margin:34px 0 26px}
.ud-ts-cot{border-radius:22px;padding:24px 26px;border:1px solid rgba(255,255,255,.12)}
.ud-ts-cot.truoc{background:rgba(255,255,255,.04)}
.ud-ts-cot.sau{background:linear-gradient(160deg,rgba(224,122,79,.22),rgba(124,92,255,.12));border-color:rgba(224,122,79,.45);box-shadow:0 30px 70px -40px rgba(224,122,79,.8)}
.ud-ts-cot h3{color:#fff;font-size:21px;margin:0 0 14px}
.ud-ts-cot h3 span{display:block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#FFD447;margin-bottom:6px}
.ud-ts-cot.truoc h3 span{color:#9AA1C4}
.ud-ts-cot ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.ud-ts-cot li{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border-radius:14px;background:rgba(255,255,255,.05)}
.ud-ts-cot li svg{flex:0 0 22px;width:22px;height:22px;margin-top:2px}
.ud-ts-cot.truoc li svg{color:#FF8A80}.ud-ts-cot.sau li svg{color:#8BF0B4}
.ud-ts-cot b{display:block;color:#fff;font-size:15.5px}.ud-ts-cot small{color:rgba(255,255,255,.66);font-size:13.5px}
.ud-ts-giua{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#FFD447;font-weight:800}
.ud-ts-mui{display:grid;place-items:center;width:74px;height:74px;border-radius:50%;background:linear-gradient(145deg,#FFE58A,#C8A028);color:#0B1020;animation:vc-nhip 2.2s ease-out infinite}
.ud-ts-mui svg{width:30px;height:30px}

/* ---------- Đối tượng (12) ---------- */
.ud-dt{grid-template-columns:repeat(3,1fr) !important;margin-top:26px}
.ud-dt li{--c:#E07A4F}
.ud-yc{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:24px;padding:22px 26px;border-radius:22px;background:#141A33;color:#fff}
.ud-yc-ic{display:grid;place-items:center;flex:0 0 56px;height:56px;border-radius:16px;background:linear-gradient(145deg,#E07A4F,#C15F3C)}
.ud-yc-ic svg{width:26px;height:26px;color:#fff}
.ud-yc>div{flex:1;min-width:260px}.ud-yc b{display:block;font-size:17px;color:#FFD447}.ud-yc small{color:rgba(255,255,255,.72);font-size:14px;line-height:1.55}

/* ---------- Hệ sinh thái Claude ---------- */
.ud-hst-luoi{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.ud-hst{position:relative;padding:22px 20px 20px;border-radius:20px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);overflow:hidden;transition:transform .3s}
.ud-hst::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--c)}
.ud-hst::after{content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--c) 45%,transparent),transparent 70%)}
.ud-hst:hover{transform:translateY(-6px)}
.ud-hst-so{font-size:12px;font-weight:800;color:var(--c);letter-spacing:.1em}
.ud-hst h3{color:#fff;font-size:19px;margin:8px 0 4px}
.ud-hst b{display:block;color:#FFD447;font-size:13.5px;margin-bottom:8px}
.ud-hst p{color:rgba(255,255,255,.7);font-size:14px;line-height:1.55;margin:0}

/* ---------- 4 buổi ---------- */
.ud-buoi-ds{display:grid;gap:34px;margin-top:34px}
.ud-buoi{display:grid;grid-template-columns:1fr 1.08fr;gap:40px;align-items:center;padding:34px;border-radius:28px;background:#F7F8FC;border:1px solid rgba(20,26,51,.06)}
.ud-buoi.dao .ud-buoi-chu{order:2}
.ud-buoi-so{display:inline-block;padding:6px 14px;border-radius:999px;background:#E07A4F;color:#fff;font-weight:800;font-size:13px;letter-spacing:.06em}
.ud-buoi h3{display:flex;gap:12px;align-items:center;font-size:25px;line-height:1.25;color:#141A33;margin:14px 0 10px}
.ud-buoi-ic{display:grid;place-items:center;flex:0 0 46px;height:46px;border-radius:14px;background:rgba(224,122,79,.14);color:#E07A4F}
.ud-buoi-ic svg{width:22px;height:22px}
.ud-buoi-mo{color:#4A5070;font-size:15.5px;line-height:1.65;margin:0 0 16px}
.ud-hoc{margin-bottom:12px}
.ud-hoc h4{font-size:15px;color:#141A33;margin:0 0 6px}
.ud-hoc ul{list-style:none;margin:0;padding:0;display:grid;gap:5px}
.ud-hoc li{display:flex;gap:8px;font-size:14px;color:#2B3050;line-height:1.5}
.ud-hoc li svg{flex:0 0 16px;width:16px;height:16px;margin-top:3px;color:#1E9E5A}
.ud-do-an{margin-top:16px;padding:16px 18px;border-radius:16px;background:linear-gradient(120deg,#1B0906,#4A1B16);color:#fff}
.ud-do-an small{display:flex;gap:8px;align-items:center;color:#FFD447;font-weight:800;font-size:12.5px;letter-spacing:.06em;text-transform:uppercase}
.ud-do-an small svg{width:16px;height:16px}
.ud-do-an b{display:block;margin-top:6px;font-size:15.5px;line-height:1.5}
.ud-buoi-hinh{min-width:0}
.ud-gal{position:relative;aspect-ratio:16/12.5}
.ud-gal .ud-bt{position:absolute;width:70%;transition:transform .45s cubic-bezier(.2,.7,.2,1),box-shadow .3s}
.ud-gal .ud-g1{left:0;top:0;z-index:1;transform:rotate(-4deg)}
.ud-gal .ud-g2{right:0;top:6%;z-index:2;transform:rotate(3deg)}
.ud-gal .ud-g3{left:6%;bottom:6%;z-index:3;transform:rotate(2deg)}
.ud-gal .ud-g4{right:3%;bottom:0;z-index:4;transform:rotate(-2deg)}
.ud-gal:hover .ud-g1{transform:translate(-4%,-4%) rotate(-7deg)}.ud-gal:hover .ud-g2{transform:translate(4%,-3%) rotate(6deg)}
.ud-gal:hover .ud-g3{transform:translate(-4%,4%) rotate(4deg)}.ud-gal:hover .ud-g4{transform:translate(4%,4%) rotate(-4deg)}
.ud-gal .ud-bt:hover{z-index:9;transform:scale(1.04) rotate(0) !important}
.ud-gal-goi{text-align:center;font-size:12.5px;color:#8A90AE;margin:10px 0 0}
/* Luồng hoạt cảnh: vạch chạy + chấm sáng đi qua từng bước */
.ud-flow{list-style:none;display:flex;gap:0;margin:18px 0 0;padding:0;position:relative}
.ud-flow li{position:relative;flex:1;min-width:0;padding:12px 8px;margin:0 6px;border-radius:14px;background:#fff;border:1px solid rgba(20,26,51,.08);text-align:center;
  animation:ud-sang 5s ease-in-out infinite;animation-delay:calc(var(--i) * .9s)}
.ud-flow li.ai{background:linear-gradient(145deg,#FFF1EA,#FFE0D2);border-color:rgba(224,122,79,.4)}
.ud-flow li:not(:last-child)::after{content:"";position:absolute;right:-13px;top:50%;width:14px;height:3px;margin-top:-1.5px;z-index:2;
  background:repeating-linear-gradient(90deg,#E07A4F 0 5px,transparent 5px 8px);background-size:16px 3px;animation:ud-chay .8s linear infinite}
.ud-flow b{display:block;font-size:12.5px;color:#141A33;line-height:1.3}
.ud-flow small{display:block;font-size:11px;color:#8A90AE;margin-top:3px;line-height:1.3}
@keyframes ud-chay{to{background-position:16px 0}}
@keyframes ud-sang{0%,12%{transform:none;box-shadow:none}6%{transform:translateY(-4px);box-shadow:0 12px 24px -12px rgba(224,122,79,.8)}}

/* ---------- 2 clip ---------- */
.ud-clip-luoi{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:34px}
.ud-clip .vc-sp{aspect-ratio:16/9;border-radius:20px;overflow:visible}
.ud-clip .vc-sp-video{inset:0;width:100%;opacity:1;transform:none;pointer-events:none}
.ud-clip .vc-sp-goi{top:10px;right:14px}
.ud-clip-chu{margin-top:26px}
.ud-clip-giong{display:inline-block;padding:5px 12px;border-radius:999px;background:rgba(224,122,79,.2);color:#FFB199;font-size:12.5px;font-weight:800}
.ud-clip h3{color:#fff;font-size:20px;margin:8px 0 0}
.ud-clip-note{text-align:center;color:rgba(255,255,255,.62);font-size:14px;margin:26px auto 0;max-width:760px}

/* ---------- Thế mạnh theo phòng ban ---------- */
.ud-tm-luoi{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.ud-tm{border-radius:20px;background:#fff;border:1px solid rgba(20,26,51,.07);overflow:hidden;box-shadow:0 20px 40px -32px rgba(20,26,51,.4);transition:transform .3s}
.ud-tm:hover{transform:translateY(-6px)}
.ud-tm header{display:flex;align-items:center;gap:12px;padding:16px 18px;background:linear-gradient(120deg,color-mix(in srgb,var(--c) 16%,#fff),#fff)}
.ud-tm header span{display:grid;place-items:center;flex:0 0 40px;height:40px;border-radius:12px;background:var(--c);color:#fff}
.ud-tm header svg{width:20px;height:20px}
.ud-tm h3{font-size:17px;margin:0;color:#141A33}
.ud-tm ul{list-style:none;margin:0;padding:6px 18px 16px}
.ud-tm li{padding:10px 0;border-top:1px dashed rgba(20,26,51,.1)}
.ud-tm li:first-child{border-top:0}
.ud-tm li b{display:block;font-size:14px;color:#141A33}
.ud-tm li small{display:flex;gap:6px;align-items:flex-start;font-size:13px;color:#5B6078;margin-top:3px}
.ud-tm li small svg{flex:0 0 14px;width:14px;height:14px;margin-top:3px;color:var(--c)}

/* ---------- Thành phẩm bento ---------- */
.ud-bento{grid-template-columns:repeat(4,1fr);grid-auto-flow:dense}

/* ---------- Lịch + inbox ---------- */
.ud-lich-khoi{padding:56px 0 !important}
.ud-lich-khoi .vc-lich{margin-top:0}

/* ---------- Khoá liên quan / 4 khoá có sẵn ---------- */
.ud-lq-luoi{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:22px}
.ud-lq{display:flex;align-items:center;gap:16px;padding:18px 20px;border-radius:20px;background:#fff;border:1px solid rgba(20,26,51,.08);text-decoration:none;color:inherit;
  box-shadow:0 18px 36px -30px rgba(20,26,51,.45);transition:transform .25s,border-color .25s}
.ud-lq:hover{transform:translateY(-4px);border-color:var(--c)}
.ud-lq-logo{display:grid;place-items:center;flex:0 0 72px;height:72px;border-radius:18px;background:linear-gradient(145deg,color-mix(in srgb,var(--c) 22%,#fff),#fff);border:1px solid rgba(20,26,51,.06)}
.ud-lq-logo img{width:48px;height:48px;object-fit:contain}
.ud-lq-chu{flex:1;min-width:0}
.ud-lq-chu small{font-size:12px;font-weight:800;color:var(--c);letter-spacing:.06em;text-transform:uppercase}
.ud-lq-chu b{display:block;font-size:16.5px;color:#141A33;line-height:1.35;margin:2px 0}
.ud-lq-chu em{font-style:normal;font-size:13.5px;color:#5B6078}
.ud-lq-mt{flex:0 0 38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#F3F4FA;color:#141A33}
.ud-lq-mt svg{width:18px;height:18px}
.ud-nb{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;margin-top:26px;padding:34px;border-radius:28px;text-decoration:none;color:#fff;
  background:radial-gradient(700px 400px at 90% 0%,rgba(224,122,79,.4),transparent 60%),linear-gradient(160deg,#0B1020,#1A1230);box-shadow:0 40px 80px -40px rgba(11,16,32,.8)}
.ud-nb-chu,.ud-nb-hinh,.ud-nb-hinh .vc-chum{display:block}
.ud-nb-chu b{display:block;font-size:26px;line-height:1.25;margin:14px 0 10px}
.ud-nb-chu em{display:block;font-style:normal;color:rgba(255,255,255,.72);font-size:15px;line-height:1.6;margin-bottom:14px}
.ud-nb .khoa-meta span{background:rgba(255,255,255,.08);color:#fff}
.ud-nb .nut{margin-top:18px}

/* ---------- Mega menu: thẻ khoá có sẵn (logo) ---------- */
.ud-mnth{display:grid !important;place-items:center}
.ud-mnth img{width:64px !important;height:64px !important;object-fit:contain;aspect-ratio:auto !important}

/* ---------- Responsive ---------- */
@media (max-width:1180px){.ud-hst-luoi,.ud-tm-luoi{grid-template-columns:repeat(2,1fr)}}
@media (max-width:980px){
  .ud-buoi,.ud-nb{grid-template-columns:1fr;padding:24px}
  .ud-buoi.dao .ud-buoi-chu{order:0}
  .ud-ts{grid-template-columns:1fr}.ud-ts-giua{flex-direction:row}
  .ud-dt{grid-template-columns:repeat(2,1fr) !important}
  .ud-clip-luoi,.ud-lq-luoi{grid-template-columns:1fr}
}
@media (max-width:620px){
  .ud-hst-luoi,.ud-tm-luoi,.ud-dt{grid-template-columns:1fr !important}
  .ud-bento{grid-template-columns:repeat(2,1fr)}
  .ud-flow{flex-wrap:wrap;gap:8px}.ud-flow li{flex:1 1 40%;margin:0}.ud-flow li::after{display:none}
  .ud-buoi h3{font-size:21px}
  .ud-gal{aspect-ratio:16/13}
}
@media (prefers-reduced-motion:reduce){.ud-flow li,.ud-flow li::after,.ud-ts-mui{animation:none}.ud-gal .ud-bt{transition:none}}
/* Học phí: hộp ưu đãi trong cột giá gốc; giá trên thẻ khoá nổi bật */
.trang-ud .vc-gia-suat{display:flex;gap:8px;align-items:flex-start}
.trang-ud .vc-gia-suat svg{flex:0 0 18px;margin-top:2px}
.trang-ud .vc-gia-suat span{color:#fff;font-size:13.5px;line-height:1.5}.trang-ud .vc-gia-suat b{color:#FFD447}
.ud-nb-gia{margin-top:14px}.ud-nb-gia s{color:rgba(255,255,255,.55)}.ud-nb-gia b{color:#FFD447;font-size:24px}.ud-nb-gia small{color:rgba(255,255,255,.75)}