/* ═══════════════════════════════════════════════════════════
   TRANG STUDIO v3 (27/10/2026) — nạp SAU lp-chung.css.
   Nguyên tắc: ít chữ, chữ rõ nhưng không quá to, một cột trên điện thoại, nút mua luôn trong tầm tay.
   Form thanh toán giữ nguyên id/class để ../assets/ev.js chạy.
   ═══════════════════════════════════════════════════════════ */
:root{--bg:#fff;--bg2:#F6F5F0;--fg:#111114;--muted:#5B5B64;--line:#E4E2DA;--card:#fff;--acc:#FFD200;--acc-fg:#111114;--den:#111114;--max:1080px;--r:18px}
body{font-size:17px}
.sec{padding:64px 0}
.alt{background:var(--bg2)}
.dau-muc{text-align:center;max-width:720px;margin:0 auto 28px}
.dau-muc .so,.voice-chu .so{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--acc);color:var(--acc-fg);font-weight:900;font-size:17px;margin-bottom:10px}
.dau-muc h2{font-size:clamp(26px,3.6vw,40px);font-weight:900;line-height:1.15;margin:0}
.dau-muc p{font-size:clamp(16px,1.6vw,19px);color:var(--muted);margin:10px auto 0;max-width:640px}
.btn svg{width:20px;height:20px}

/* ── Thanh trên ── */
.top{position:sticky;top:0;z-index:30;background:rgba(17,17,20,.92);backdrop-filter:saturate(1.4) blur(8px);-webkit-backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid #26262c}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:17px;text-decoration:none;color:#fff;white-space:nowrap}
.logo i{width:32px;height:32px;border-radius:9px;background:var(--acc);color:var(--acc-fg);display:grid;place-items:center;font-style:normal;font-size:15px}
.top .btn{min-height:42px;font-size:15px;padding:0 18px}

/* ── Mở đầu ── */
.hero{background:var(--den);color:#fff;padding:56px 0 48px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;left:20%;top:-300px;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle,rgba(255,210,0,.2),transparent 62%);pointer-events:none}
.hero-g{position:relative;display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.hero-nhan{display:inline-block;font-weight:700;font-size:14px;letter-spacing:.04em;text-transform:uppercase;color:var(--acc);margin:0 0 14px}
.hero h1{font-size:clamp(34px,4.6vw,58px);font-weight:900;line-height:1.06;letter-spacing:-.02em;margin:0 0 16px}
.hero h1 span{display:block;color:var(--acc)}
.hero .lead{font-size:clamp(17px,1.7vw,21px);line-height:1.5;color:#D9D9E0;margin:0 0 18px;max-width:560px}
.hero-tick{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:8px}
.hero-tick li{display:flex;align-items:center;gap:10px;font-weight:600;font-size:16px}
.hero-tick svg{width:22px;height:22px;flex:none;color:var(--acc-fg);background:var(--acc);border-radius:50%;padding:3px}
.hero-gia{font-size:16px;color:#C9C9D2;margin:0 0 20px}
.hero-gia b{color:#fff;font-size:19px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn{min-height:54px;font-size:17px;padding:0 24px}
.hero .btn-line{color:#fff;border-color:#45454f}
.hero-video{display:flex;justify-content:center}
.hero-video .yt{width:min(100%,300px)}

/* ── Khung YouTube (chỉ tải khi bấm) ── */
.yt{position:relative;border-radius:22px;overflow:hidden;background:#000;cursor:pointer;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.yt-doc{aspect-ratio:9/16}
.yt-ngang{aspect-ratio:16/9;max-width:900px;margin:0 auto}
.yt img{width:100%;height:100%;object-fit:cover;display:block}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.yt-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;border:0;background:var(--acc);color:var(--acc-fg);display:grid;place-items:center;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.4);transition:transform .15s}
.yt:hover .yt-play{transform:translate(-50%,-50%) scale(1.06)}
.yt-play svg{width:32px;height:32px;margin-left:4px}
.yt-nhan{position:absolute;left:12px;bottom:12px;padding:7px 12px;border-radius:999px;background:rgba(0,0,0,.72);color:#fff;font-weight:700;font-size:14px}
.yt.dang-xem .yt-play,.yt.dang-xem .yt-nhan{display:none}

/* ── 1. Hai bước ── */
.hai-buoc{display:grid;grid-template-columns:1fr auto 1fr auto 1.1fr;gap:14px;align-items:stretch;max-width:980px;margin:0 auto}
.hb{background:var(--card);border:2px solid var(--line);border-radius:22px;padding:24px 18px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}
.hb .hinh{width:76px;height:76px;border-radius:22px;display:grid;place-items:center;font-size:40px;background:var(--bg2)}
.hb .bc{font-weight:800;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.hb b{font-size:clamp(18px,2vw,22px);line-height:1.2}
.hb small{font-size:14px;color:var(--muted);line-height:1.35}
.hb.kq{background:var(--acc);border-color:var(--acc)}
.hb.kq .bc,.hb.kq small{color:var(--fg);opacity:.75}
.hb.kq .hinh{background:rgba(255,255,255,.5)}
.noi{display:grid;place-items:center;font-size:32px;font-weight:900;color:var(--muted)}
.can-gi{display:flex;gap:12px;align-items:flex-start;max-width:820px;margin:22px auto 0;background:var(--bg2);border:1px solid var(--line);border-radius:16px;padding:14px 16px;font-size:15px;line-height:1.5}
.can-gi span:first-child{font-size:24px;line-height:1.1}

/* ── 2. Học & dựng ── */
.chip3{list-style:none;margin:24px auto 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:980px}
.chip3 li{background:var(--card);border:2px solid var(--line);border-radius:18px;padding:16px 18px;display:grid;gap:4px}
.chip3 b{font-size:17px}
.chip3 span{font-size:14.5px;color:var(--muted);line-height:1.4}
.giua-cta{text-align:center;margin:26px 0 0}

/* ── 3. Nhận được gì ── */
.loi3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:980px;margin:0 auto}
.loi{background:var(--card);border:2px solid var(--line);border-radius:22px;padding:26px 22px;text-align:center}
.loi .to{display:block;font-size:clamp(40px,5vw,56px);font-weight:900;line-height:1;color:var(--fg);margin-bottom:10px;letter-spacing:-.02em}
.loi .to::after{content:'';display:block;width:44px;height:6px;border-radius:3px;background:var(--acc);margin:12px auto 0}
.loi h3{font-size:17px;font-weight:700;margin:0;line-height:1.35;color:var(--muted)}

/* ── 4. Giọng AI ── */
.voice-g{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:center;max-width:980px}
.voice-video{display:flex;justify-content:center}
.voice-video .yt{width:min(100%,300px)}
.voice-chu h2{font-size:clamp(26px,3.6vw,40px);font-weight:900;line-height:1.15;margin:0 0 10px}
.voice-chu p{font-size:clamp(16px,1.6vw,19px);color:var(--muted);margin:0 0 16px}
.voice-chu .hero-tick li{color:var(--fg)}

/* ── 5. Bằng chứng ── */
.bc-luoi{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;max-width:980px;margin:0 auto}
.bc-o{margin:0;background:var(--card);border:2px solid var(--line);border-radius:22px;overflow:hidden;display:flex;flex-direction:column}
.bc-o figcaption{padding:16px 18px 12px}
.bc-o figcaption b{display:block;font-size:17px;line-height:1.3}
.bc-o figcaption small{display:block;font-size:14px;color:var(--muted);margin-top:4px}
.bc-o img{width:100%;height:auto;border-top:1px solid var(--line)}

/* ── 6. Hỏi đáp ── */
.hoi{max-width:760px;margin:0 auto;background:var(--card);border:2px solid var(--line);border-radius:22px;padding:4px 20px}
.hoi details{border-bottom:1px solid var(--line);padding:14px 0}
.hoi details:last-child{border-bottom:0}
.hoi summary{font-weight:700;font-size:16.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.hoi summary::-webkit-details-marker{display:none}
.hoi summary::after{content:'+';flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--bg2);font-size:20px;line-height:1;color:var(--fg)}
.hoi details[open] summary::after{content:'–';background:var(--acc)}
.hoi details p{margin:10px 0 2px;color:var(--muted);font-size:15.5px;line-height:1.5}

/* ── 7. Cài đặt ── */
.cai-buoc{list-style:none;margin:22px auto 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:900px}
.cai-buoc li{display:flex;gap:10px;align-items:center;background:var(--card);border:2px solid var(--line);border-radius:16px;padding:12px 14px;font-weight:600;font-size:15px;line-height:1.35}
.cai-buoc b{flex:none;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--acc);font-size:15px}

/* ── 8. Gói ── */
.plans.ba{grid-template-columns:repeat(3,1fr);max-width:1020px;margin:28px auto 0}
.plan{padding:26px 20px 22px;border-radius:22px}
.plan.hot{transform:translateY(-6px)}
.plan .ribbon{left:50%;transform:translateX(-50%);white-space:nowrap;max-width:calc(100% - 24px);overflow:hidden;text-overflow:ellipsis}
.plan .p-ten{font-size:19px}
.plan .p-cho{font-size:14px}
.plan .p-gia{font-size:34px;margin:4px 0 10px}
.plan .p-gia small{font-size:14px}
.plan li{font-size:15px}
.len-goi{max-width:760px;margin:18px auto 0;background:#FFF6CC;border-radius:12px;padding:12px 16px;font-size:15px;text-align:center}
.seg{grid-template-columns:repeat(3,1fr)}
.seg button b{font-size:14px;line-height:1.2}
.seg button span{font-size:12.5px}
.pay{margin-top:28px;border-radius:22px}
.pay-h{font-size:22px}
.tin-cay{list-style:none;margin:16px 0 0;padding:14px 0 0;border-top:1px solid var(--line);display:grid;gap:6px;font-size:14px;color:var(--muted)}
.tin-cay a{color:var(--fg);font-weight:700;text-decoration:none}

/* ── Chưa mua: để lại Zalo ── */
.lead{max-width:560px;margin:18px auto 0;background:var(--den);color:#fff;border-radius:22px;padding:22px 22px 18px}
.lead-chu b{display:block;font-size:19px;margin-bottom:4px}
.lead-chu span{font-size:14.5px;color:#C9C9D2;line-height:1.45;display:block}
.lead-form{display:grid;grid-template-columns:1.2fr 1fr auto;gap:8px;margin-top:14px}
.lead-form input,.lead-form select{height:48px;border:2px solid #3a3a44;border-radius:12px;padding:0 12px;font:15px var(--font);background:#1b1b21;color:#fff;min-width:0}
.lead-form select{appearance:none;-webkit-appearance:none}
.lead-form input:focus,.lead-form select:focus{outline:none;border-color:var(--acc)}
.lead-form .btn{min-height:48px;color:var(--acc-fg);background:var(--acc);border:0;padding:0 18px;font-size:15px}
.lead-ok{margin:10px 0 0;font-weight:700;color:#8EF0A9}
.lead .err{color:#FF8A84;margin:8px 0 0;font-size:14px}

/* ── Chân trang, thanh mua ── */
.foot{padding:28px 16px 120px}
.sticky{padding:8px 8px 8px 16px}
.sticky b{font-size:15px}
.sticky > div > span{font-size:12.5px}
.sticky .btn{min-height:44px;font-size:15px;padding:0 18px}

/* ── Điện thoại ── */
@media (max-width:820px){
  body{font-size:16px}
  .sec{padding:40px 0}
  .dau-muc{margin-bottom:18px}
  .dau-muc h2{font-size:24px}
  .dau-muc p{font-size:15px}
  .top .wrap{height:54px}
  .logo{font-size:15px}
  .logo i{width:28px;height:28px;font-size:13px}
  .top .btn{min-height:38px;font-size:14px;padding:0 14px}
  .hero{padding:28px 0 30px}
  .hero-g{grid-template-columns:1fr;gap:22px}
  .hero-nhan{font-size:12px;margin-bottom:10px}
  .hero h1{font-size:32px;margin-bottom:12px}
  .hero .lead{font-size:16px;margin-bottom:14px}
  .hero-tick li{font-size:15px}
  .hero-gia{font-size:15px}
  .hero-gia b{font-size:17px}
  .hero .cta .btn{flex:1 1 auto;min-height:50px;font-size:16px;padding:0 16px}
  .hero-video .yt,.voice-video .yt{width:min(100%,260px)}
  .hai-buoc{grid-template-columns:1fr auto 1fr auto 1fr;gap:4px}
  .hb{padding:12px 6px;gap:5px;border-radius:14px;border-width:1.5px}
  .hb .hinh{width:44px;height:44px;font-size:24px;border-radius:12px}
  .hb .bc{font-size:10px;letter-spacing:.06em}
  .hb b{font-size:14px}
  .hb small{display:none}
  .noi{font-size:18px}
  .can-gi{font-size:14px;padding:12px 14px}
  .yt-ngang{border-radius:16px}
  .chip3{grid-template-columns:1fr;gap:10px;margin-top:16px}
  .chip3 li{padding:14px 16px}
  .loi3{grid-template-columns:repeat(3,1fr);gap:8px}
  .loi{padding:16px 8px;border-radius:16px}
  .loi .to{font-size:26px}
  .loi .to::after{width:28px;height:4px;margin-top:8px}
  .loi h3{font-size:13px}
  .voice-g{grid-template-columns:1fr;gap:18px}
  .voice-video{order:2}
  .voice-chu h2{font-size:24px}
  .voice-chu p{font-size:15px}
  .bc-luoi{grid-template-columns:1fr;gap:12px}
  .bc-o figcaption b{font-size:16px}
  .hoi{padding:2px 14px;border-radius:16px}
  .hoi summary{font-size:15.5px}
  .cai-buoc{grid-template-columns:1fr;gap:8px;margin-top:14px}
  .plans.ba{grid-template-columns:1fr;gap:12px;margin-top:16px}
  .plan.hot{order:-1;transform:none}
  .plan .ribbon{font-size:12px}
  .len-goi{font-size:14px}
  .seg{gap:6px}
  .seg button{padding:10px 4px}
  .seg button b{font-size:13px}
  .lead{padding:18px 16px 16px;border-radius:16px}
  .lead-form{grid-template-columns:1fr 1fr}
  .lead-form .btn{grid-column:1/-1}
}
@media (max-width:360px){
  .hero h1{font-size:28px}
  .loi3{grid-template-columns:1fr 1fr 1fr;gap:6px}
}

/* ── Quà tặng & đếm ngược ưu đãi ── */
.plan li.qua{background:#FFF6CC;border-radius:10px;padding:6px 8px;margin:2px -4px 0}
.plan li.qua svg{color:#B8860B}
.plan li.qua s{color:var(--muted);font-weight:400}
.hero-tick .qua-li{color:var(--acc);font-weight:700}
.hero-tick .qua-li s{color:#9a9aa6;font-weight:400;margin:0 2px}
.dem-bar{display:flex;align-items:center;justify-content:center;gap:12px;min-height:40px;padding:6px 14px;background:var(--acc);color:var(--acc-fg);text-decoration:none;font-size:14px;font-weight:600;line-height:1.3}
.dem-bar .dem-chu b{font-weight:800}
.dem-bar .dem-so{font-variant-numeric:tabular-nums;font-weight:900;font-size:16px;background:var(--den);color:var(--acc);padding:3px 10px;border-radius:999px;white-space:nowrap}
.dem-the{max-width:760px;margin:0 auto 22px;background:var(--den);color:#fff;border-radius:18px;padding:16px 20px;display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
.dem-the-chu b{display:block;font-size:16px;color:var(--acc);margin-bottom:2px}
.dem-the-chu span{font-size:14px;color:#D9D9E0;line-height:1.45}
.dem-the-chu span b{display:inline;color:#fff;font-size:14px;margin:0}
.dem-the-so{display:flex;align-items:center;gap:6px}
.dem-the-so div{text-align:center;background:#1E1E25;border-radius:12px;padding:8px 10px;min-width:58px}
.dem-the-so b{display:block;font-size:26px;font-weight:900;line-height:1;font-variant-numeric:tabular-nums;color:var(--acc)}
.dem-the-so small{font-size:11px;color:#9a9aa6}
.dem-the-so i{font-style:normal;font-weight:900;font-size:22px;color:#55555E}
@media (max-width:820px){
  .dem-bar{font-size:13px;gap:8px;padding:6px 10px}
  .dem-bar .dem-chu{flex:1}
  .dem-bar .dem-so{font-size:14px}
  .dem-the{grid-template-columns:1fr;padding:14px 16px;gap:12px}
  .dem-the-so{justify-content:center}
  .dem-the-so div{min-width:64px}
}

/* ── v3.2: bằng chứng, neo giá, cam kết, nhóm Zalo ── */
.hero-proof{margin:14px 0 0;font-size:15px;color:#C9C9D2}
.hero-proof b{color:#fff;font-size:17px}
.hero-proof a{color:var(--acc);font-weight:700;text-decoration:none;white-space:nowrap}
.neo-gia{text-align:center;max-width:720px;margin:0 auto 6px;font-size:16px;color:var(--muted)}
.neo-gia b{color:var(--fg)}
.cam-ket{display:flex;gap:12px;align-items:center;max-width:760px;margin:18px auto 0;background:#E9F8EE;border:2px solid #9BDDB0;border-radius:16px;padding:14px 18px;font-size:16px;line-height:1.4}
.cam-ket span{font-size:26px;line-height:1}
.cam-ket b{color:#0B7A3B}
.tin-cay b{color:var(--fg)}
.qr-giup{font-size:13.5px;color:var(--muted);text-align:center;margin:6px 0 0}
.nhom{max-width:560px;margin:18px auto 0;background:var(--den);color:#fff;border-radius:22px;padding:22px 22px 18px}
.nhom-chu b{display:block;font-size:19px;margin-bottom:4px}
.nhom-chu span{font-size:14.5px;color:#C9C9D2;line-height:1.45;display:block}
.nhom-nut{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.nhom-nut .btn{flex:1 1 200px;min-height:48px;font-size:15px}
.nhom-nut .btn-line{color:#fff;border-color:#45454f}
.nhom-nut #guiMail{display:none}
@media (max-width:820px){
  .hero-proof{font-size:14px}
  .hero-proof a{display:block;margin-top:4px}
  .neo-gia{font-size:14.5px}
  .cam-ket{font-size:14.5px;padding:12px 14px;border-radius:14px}
  .nhom{padding:18px 16px 16px;border-radius:16px}
  .nhom-nut #guiMail{display:inline-flex}
}

/* ── v3.3: đầu trang gọn, 6 ô lợi ích ── */
.hero{padding:44px 0 40px}
.hero-g{grid-template-columns:1.2fr .8fr;gap:36px}
.hero h1{font-size:clamp(36px,4.8vw,62px);margin-bottom:14px}
.hero .lead{font-size:clamp(18px,1.8vw,22px);margin-bottom:22px;max-width:520px}
.o6{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:1020px;margin:0 auto}
.o{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:12px;row-gap:2px;align-items:start;background:var(--card);border:2px solid var(--line);border-radius:18px;padding:16px 18px}
.o i{grid-row:1/3;font-style:normal;font-size:28px;line-height:1;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--bg2)}
.o b{font-size:16.5px;line-height:1.25}
.o span{font-size:14px;color:var(--muted);line-height:1.4}
.o.qua{border-color:var(--acc);background:#FFF6CC}
.o.qua i{background:var(--acc)}
.dai-gia{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 22px;max-width:1020px;margin:20px auto 0;padding:14px 18px;border-radius:999px;background:var(--den);color:#D9D9E0;font-size:15px}
.dai-gia b{color:#fff}
.dai-gia a{color:var(--acc);font-weight:700;text-decoration:none}
@media (max-width:820px){
  .hero{padding:26px 0 26px}
  .hero-g{grid-template-columns:1fr;gap:20px}
  .hero h1{font-size:34px}
  .hero .lead{font-size:16.5px;margin-bottom:16px}
  .o6{grid-template-columns:1fr 1fr;gap:8px}
  .o{grid-template-columns:1fr;row-gap:4px;padding:12px 12px;border-radius:14px}
  .o i{grid-row:auto;width:36px;height:36px;font-size:22px;border-radius:10px;margin-bottom:4px}
  .o b{font-size:14px}
  .o span{font-size:12.5px}
  .dai-gia{border-radius:16px;padding:12px 14px;font-size:14px;gap:6px 14px;flex-direction:column;text-align:center}
}

/* ── v3.4: giảm 30%, giá cũ gạch, đồng hồ trên form ── */
s[data-gia-cu]{color:var(--muted);font-weight:500;text-decoration:line-through;font-size:.62em;margin-right:6px}
s[data-gia-cu]:empty{display:none}
.p-gia .giam{display:inline-block;font-style:normal;font-size:12px;font-weight:800;background:var(--acc);color:var(--acc-fg);padding:2px 7px;border-radius:999px;vertical-align:middle}
.p-gia s[data-gia-cu]{font-size:16px;margin-right:6px}
.dai-gia s[data-gia-cu]{color:#9a9aa6;font-size:13px}
.neo-gia s[data-gia-cu]{font-size:14px}
.seg button s[data-gia-cu]{font-size:11px;margin-right:3px}
.sticky s[data-gia-cu]{color:#9a9aa6;font-size:12px;margin-right:4px}
.sticky b[data-dem-gio],.sticky b[data-dem-phut],.sticky b[data-dem-giay]{display:inline;font-variant-numeric:tabular-nums;color:var(--acc);font-size:inherit;line-height:inherit}
.sticky > div > span{display:block}
.sticky s[data-gia-cu]{display:inline}
.dem-form{display:flex;align-items:center;justify-content:center;gap:8px;margin:-6px 0 14px;padding:8px 12px;border-radius:12px;background:#FFF6CC;font-weight:700;font-size:15px}
.dem-form .dem-so{font-variant-numeric:tabular-nums;font-weight:900;background:var(--den);color:var(--acc);padding:2px 10px;border-radius:999px}