/* ═══════════════════════════════════════════════════════════
   TRANG STUDIO v4 (10/11/2026) — nạp SAU lp-chung.css và trang-v3.css.
   Hành trình người mới: thấy ngay trước/sau → hiểu Studio là gì → xem cách dùng
   → tin bằng khách thật → chọn gói. Giá, form, QR, đếm ngược giữ nguyên của v3.
   Dấu hiệu nhận diện: khung phim hai viền vàng + vết cắt đỏ (lấy từ logo Studio).
   ═══════════════════════════════════════════════════════════ */
:root{
  --den:#141518; --den-2:#1D1F24; --vien:#2A2D33;
  --vang:#FFD200; --do:#FF5B4A; --do-chu:#C2321F; --kem:#ECE7DD;
  --bg2:#F5F4EF;
  --hien:'Barlow Condensed','Be Vietnam Pro',system-ui,sans-serif;
}
body{font-size:17px}
:focus-visible{outline:3px solid var(--do);outline-offset:3px}
.an{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
q{quotes:'“' '”'}
main section[id],#gia,#pay{scroll-margin-top:112px}

/* ── Thanh trên: thêm mục lục cho máy tính ── */
.top .wrap{gap:16px}
.top-nav{display:flex;gap:22px;margin-left:auto;margin-right:8px}
.top-nav a{color:#C9C9D2;text-decoration:none;font-weight:600;font-size:15px}
.top-nav a:hover{color:#fff}

/* ── Tiêu đề mục: câu hỏi người mới đang nghĩ trong đầu ── */
.muc{max-width:760px;margin:0 0 30px}
p.hoi-nho,.muc p.hoi-nho,.vd-them-chu p.hoi-nho,.nguoi-g p.hoi-nho{display:inline-block;margin:0 0 8px;font:800 19px/1 var(--hien);letter-spacing:.06em;text-transform:uppercase;color:var(--do-chu)}
.muc h2{font:800 clamp(32px,4.4vw,52px)/1.02 var(--hien);letter-spacing:-.005em;margin:0}
.muc p{font-size:clamp(16px,1.6vw,19px);color:var(--muted);margin:12px 0 0;max-width:640px}
.sec{padding:76px 0}

/* ── Mở đầu ── */
.hero{padding:52px 0 56px}
.hero::before{display:none}
.hero-g{grid-template-columns:1fr minmax(0,480px);gap:48px}
.hero h1{font:800 clamp(44px,5.6vw,76px)/.98 var(--hien);letter-spacing:-.005em;margin:0 0 18px}
.hero h1 span{display:block;color:var(--vang)}
.mo-ta{font-size:clamp(17px,1.6vw,20px);line-height:1.55;color:#D9D9E0;margin:0 0 22px;max-width:540px}
.mo-ta b{color:#fff}
.mo-ta q{color:#fff;font-weight:600}
.hero-khach{display:flex;align-items:center;gap:12px;margin:22px 0 0;color:#D9D9E0;text-decoration:none;font-size:15px;line-height:1.4;max-width:520px}
.hero-khach b{color:var(--vang)}
.ava-hang{display:flex;flex:none}
.ava-hang img{width:40px;height:40px;border-radius:50%;border:2px solid var(--den);object-fit:cover}
.ava-hang img+img{margin-left:-12px}
.hero-tin{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.hero-tin li{font-size:14px;color:#C9C9D2;border:1px solid #33353c;border-radius:999px;padding:5px 12px}
.hero-tin b{color:#fff}

/* Khung phim trước / sau */
.phim{margin:0;position:relative;display:grid;grid-template-columns:1fr 34px 1fr;align-items:stretch;padding:16px 30px;background:#0B0B0D;border-radius:6px;
  --lo:radial-gradient(circle at 50% 50%,#0B0B0D 3px,transparent 3.5px);}
.phim::before,.phim::after{content:'';position:absolute;top:0;bottom:0;width:18px;background:var(--lo) 0 0/18px 22px repeat-y,var(--vang)}
.phim::before{left:0}
.phim::after{right:0}
.phim-o{position:relative;border-radius:8px;overflow:hidden;background:#000;aspect-ratio:9/16}
.phim-o video{width:100%;height:100%;object-fit:cover}
.phim-nhan{position:absolute;z-index:2;left:8px;top:8px;padding:4px 10px;border-radius:999px;background:rgba(0,0,0,.72);color:#fff;font-size:12.5px;font-weight:700}
.phim-o.sau .phim-nhan{background:var(--vang);color:var(--den)}
.phim-o .tieng{z-index:2}
.phim-cat{position:relative;display:grid;place-items:center}
.phim-cat::before{content:'';position:absolute;left:50%;top:6%;bottom:6%;width:12px;margin-left:-6px;border-radius:6px;background:var(--do);transform:rotate(14deg)}
.phim-cat span{position:relative;writing-mode:vertical-rl;transform:rotate(180deg);font:800 15px/1 var(--hien);letter-spacing:.08em;text-transform:uppercase;color:var(--den);background:var(--do);padding:10px 4px;border-radius:6px}
.phim figcaption{grid-column:1/-1;margin-top:12px;font-size:13.5px;color:#9a9aa6;text-align:center}
.phim.nho{max-width:460px;margin:0 auto}

/* ── Studio là gì ── */
.lagi-g{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:center}
.ai-lam{display:grid;gap:12px}
.al{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center;background:var(--card);border:2px solid var(--line);border-radius:18px;padding:18px 20px}
.al p{margin:0;font-size:16.5px;line-height:1.5}
.al-ai{font:800 24px/1 var(--hien);text-transform:uppercase;letter-spacing:.02em}
.al.may{background:var(--den);border-color:var(--den);color:#fff}
.al.may .al-ai{color:var(--vang)}
.lagi-video .yt{width:100%;max-width:300px;margin:0 auto}

.so-bang{margin:40px 0 0;border:2px solid var(--den);border-radius:18px;overflow:hidden;font-size:15.5px}
.sb-hang{display:grid;grid-template-columns:150px 1fr 1fr 1.15fr}
.sb-hang>span{padding:14px 16px;border-top:1px solid var(--line);line-height:1.4}
.sb-hang>span[role=rowheader]{font-weight:700}
.sb-dau>span{border-top:0;font:800 19px/1.1 var(--hien);text-transform:uppercase;letter-spacing:.02em;background:var(--bg2)}
.sb-hang .sb-ta{background:#FFF6CC;font-weight:600}
.sb-dau .sb-ta{background:var(--vang)}
.hop-voi{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:26px 0 0;font-size:15px}
.hop-voi span{background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:6px 14px}

/* ── Cách dùng ── */
.ba-buoc-g{display:grid;grid-template-columns:1fr 340px;gap:48px;align-items:center}
.ba-buoc{list-style:none;margin:0;padding:0;display:grid;gap:14px;counter-reset:b}
.ba-buoc li{counter-increment:b;position:relative;display:grid;gap:6px;background:var(--card);border:2px solid var(--line);border-radius:18px;padding:20px 22px 20px 92px;min-height:96px}
.ba-buoc li::before{content:counter(b);position:absolute;left:22px;top:14px;font:800 64px/1 var(--hien);color:var(--vang);-webkit-text-stroke:2px var(--den)}
.ba-buoc b{font:800 26px/1.05 var(--hien);text-transform:uppercase;letter-spacing:.01em}
.ba-buoc span{font-size:16px;color:var(--muted);line-height:1.5}
.bong{display:block;justify-self:start;background:var(--den);color:#fff;border-radius:16px 16px 16px 4px;padding:10px 16px;font-weight:600;font-size:16px}
.ba-anh{margin:0}
.ba-anh img{border-radius:18px;box-shadow:0 20px 50px rgba(0,0,0,.18)}
.vd-them{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center;margin-top:56px;padding-top:48px;border-top:2px dashed var(--line)}
.vd-them h3{font:800 36px/1 var(--hien);margin:0 0 10px}
.vd-them-chu p{color:var(--muted)}

/* ── Video làm ra trông thế nào ── */
.hu-luoi{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.hu-luoi figure{margin:0}
.hu-luoi video{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:14px;background:#000}
.hu-luoi figcaption{margin-top:8px;font-weight:700;font-size:15px}
.hai-yt{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px}
.hy p{margin:12px 0 0;font-size:15.5px;color:var(--muted)}
.hy p b{color:var(--fg)}
.hy .yt-ngang{max-width:none}

/* ── Khách thật (nền tối) ── */
.toi{background:var(--den);color:#fff}
.toi .muc p{color:#C9C9D2}
.toi .muc p.hoi-nho{color:var(--vang)}
.case-luoi{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.case{background:var(--den-2);border:1px solid var(--vien);border-radius:20px;overflow:hidden;display:flex;flex-direction:column}
.case-bia{width:100%;aspect-ratio:16/6;object-fit:cover;background:#000}
.case-bia.vua{object-fit:contain;background:#A3191F}
.case-than{padding:0 22px 22px;display:flex;flex-direction:column;gap:14px;flex:1}
.case-dau{display:flex;align-items:flex-start;gap:14px;margin-top:0}
.case-dau img{width:72px;height:72px;margin-top:-30px;border-radius:50%;object-fit:cover;border:3px solid var(--vang);background:#000;flex:none}
.case-dau>div{padding-top:12px}
.case-dau h3{font:800 26px/1.05 var(--hien);margin:0 0 3px}
.case-dau span{font-size:14px;color:#9a9aa6}
.case-so{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 22px}
.case-so li{font-size:13.5px;color:#C9C9D2;line-height:1.3;max-width:170px}
.case-so b{display:block;font:800 34px/1 var(--hien);color:var(--vang)}
.case blockquote{margin:0;padding:12px 0 0;border-top:1px solid var(--vien);font-size:16px;line-height:1.5;color:var(--kem)}
.sao{display:block;color:var(--vang);letter-spacing:2px;font-size:15px;margin-bottom:4px}
.sao i{font-style:normal;color:#4a4c54}
.case-ghi{margin:0;font-size:14.5px;color:#C9C9D2}
.case-ghi a{color:var(--vang);font-weight:700}
.case-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.case-link{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid #45474f;border-radius:999px;color:#fff;text-decoration:none;font-weight:600;font-size:14px}
.case-link:hover{border-color:var(--vang);color:var(--vang)}
.case-link svg{width:14px;height:14px}
.nguon{margin:18px 0 0;font-size:13px;color:#8a8a96}

/* ── Kết quả + tin nhắn ── */
.kq-luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.kq{margin:0;background:var(--card);border:2px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column}
.kq figcaption{padding:16px 18px 14px}
.kq figcaption b{display:block;font:800 44px/1 var(--hien);color:var(--den)}
.kq figcaption b::after{content:'';display:block;width:40px;height:5px;border-radius:3px;background:var(--vang);margin:8px 0 6px}
.kq figcaption span{font-size:14.5px;color:var(--muted);line-height:1.4}
.kq img{width:100%;aspect-ratio:1/1;object-fit:cover;object-position:top;border-top:1px solid var(--line)}
.tin-tieu{font:800 28px/1.1 var(--hien);margin:52px 0 18px}
.tin-tuong{columns:4 230px;column-gap:14px}
.tin-tuong figure{break-inside:avoid;margin:0 0 14px;background:var(--bg2);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.tin-tuong figcaption{padding:10px 12px;font-size:14px;font-weight:600;line-height:1.4}
.phieu-luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.phieu{margin:0;background:var(--card);border:2px solid var(--line);border-radius:16px;padding:16px 18px;display:flex;flex-direction:column;gap:6px}
.phieu .sao{color:#E0A800}
.phieu .sao i{color:#D8D6CE}
.phieu p{margin:0;font-size:15.5px;line-height:1.5}
.phieu cite{margin-top:auto;font-style:normal;font-size:13.5px;color:var(--muted)}

/* ── Cần gì + cài đặt ── */
.can-g{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;align-items:start}
.can-ds{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.can-ds li{display:flex;gap:12px;background:var(--card);border:2px solid var(--line);border-radius:16px;padding:16px 18px;font-size:15.5px;line-height:1.5}
.can-ds svg{width:24px;height:24px;flex:none;color:var(--den);background:var(--vang);border-radius:50%;padding:4px;margin-top:1px}
.chua-hop{border:2px dashed #C9C6BA;border-radius:16px;padding:16px 18px;font-size:15px;line-height:1.5;color:var(--muted)}
.chua-hop b{display:block;color:var(--fg);font-size:16px;margin-bottom:4px}
.cai-g{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;margin-top:44px}
.cai-g h3{font:800 30px/1 var(--hien);margin:0 0 12px}
.cai-g .cai-buoc{grid-template-columns:1fr;margin:0 0 12px}
.cai-g .yt-ngang{max-width:none}

/* ── Gói ── */
.goi-goi-y{text-align:center;max-width:720px;margin:8px auto 0;font-size:15px}
#dang-ky .muc{text-align:center;margin-left:auto;margin-right:auto}
#dang-ky .muc p{margin-left:auto;margin-right:auto}
.lead-form{margin-top:14px}
.lead-form .err{grid-column:1/-1;color:#FF8A84;margin:0;font-size:14px}
.nhom-nut .btn{flex:1 1 200px}

/* ── Hỏi đáp, người làm ── */
#lo-ngai .muc{text-align:center;margin-left:auto;margin-right:auto}
.nguoi-g{display:grid;grid-template-columns:200px 1fr;gap:36px;align-items:center;max-width:860px}
.nguoi-g img{width:200px;height:200px;border-radius:50%;object-fit:cover;border:5px solid var(--vang)}
.nguoi-g h2{font:800 40px/1 var(--hien);margin:0 0 12px}
.nguoi-g p{color:var(--muted)}

/* ── Máy tính bảng ── */
@media (max-width:1000px){
  .top-nav{display:none}
  .hero-g{grid-template-columns:1fr;gap:32px}
  .phim{max-width:560px;margin:0 auto}
  .tin-tuong{columns:3 200px}
}

/* ── Điện thoại ── */
@media (max-width:820px){
  .sec{padding:48px 0}
  .muc{margin-bottom:22px}
  p.hoi-nho,.muc p.hoi-nho{font-size:16px}
  .muc h2{font-size:32px}
  .muc p{font-size:15.5px}
  .hero{padding:28px 0 36px}
  .hero h1{font-size:44px;margin-bottom:14px}
  .hero-g{gap:0}
  .hero-chu{display:contents}
  .hero-nhan{order:1}
  .hero h1{order:2}
  .hero .phim{order:3;margin:4px 0 22px;width:100%}
  .mo-ta{order:4}
  .hero .cta{order:5}
  .hero-khach{order:6}
  .hero-tin{order:7}
  .mo-ta{font-size:16.5px;margin-bottom:18px}
  .hero-khach{font-size:14px}
  .ava-hang img{width:34px;height:34px}
  .phim{grid-template-columns:1fr 24px 1fr;padding:12px 24px}
  .phim::before,.phim::after{width:14px;background-size:14px 18px,auto}
  .phim-cat::before{width:8px;margin-left:-4px}
  .phim-cat span{font-size:13px;padding:8px 3px}
  .phim-nhan{font-size:12.5px;padding:3px 8px;left:6px;top:6px}
  .phim .tieng{right:6px;bottom:6px;min-height:36px;padding:6px 10px;font-size:13px}
  .lagi-g{grid-template-columns:1fr;gap:24px}
  .al{grid-template-columns:1fr;gap:6px;padding:14px 16px}
  .al-ai{font-size:20px}
  .al p{font-size:15.5px}
  .lagi-video .yt{max-width:260px}
  .so-bang{font-size:14px;margin-top:28px}
  .sb-hang{grid-template-columns:1fr 1fr 1.1fr}
  .sb-hang>span[role=rowheader]{grid-column:1/-1;padding:10px 12px 0;border-top:1px solid var(--line);background:var(--card);font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
  .sb-hang>span{padding:6px 10px 12px}
  .sb-hang>span[role=cell]{border-top:0}
  .sb-dau>span:first-child{display:none}
  .sb-dau>span{padding:10px;font-size:15px}
  .hop-voi{font-size:14px}
  .ba-buoc-g{grid-template-columns:1fr;gap:24px}
  .ba-buoc li{padding:16px 16px 16px 70px}
  .ba-buoc li::before{font-size:50px;left:16px}
  .ba-buoc b{font-size:22px}
  .ba-buoc span{font-size:15px}
  .ba-anh{max-width:300px;margin:0 auto}
  .vd-them{grid-template-columns:1fr;gap:20px;margin-top:36px;padding-top:32px}
  .vd-them h3{font-size:30px}
  .hu-luoi{grid-template-columns:repeat(2,1fr);gap:10px}
  .hu-luoi figcaption{font-size:14px}
  .hai-yt{grid-template-columns:1fr;gap:28px;margin-top:32px}
  .case-luoi{grid-template-columns:1fr;gap:16px}
  .case-than{padding:0 16px 18px}
  .case-dau img{width:60px;height:60px;margin-top:-26px}
  .case-dau>div{padding-top:10px}
  .case-dau h3{font-size:23px}
  .case-so b{font-size:30px}
  .kq-luoi{grid-template-columns:1fr;gap:14px}
  .kq figcaption b{font-size:38px}
  .tin-tieu{font-size:24px;margin:40px 0 14px}
  .tin-tuong{columns:auto;display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;align-items:flex-start;margin:0 -16px;padding:0 16px 8px;-webkit-overflow-scrolling:touch}
  .tin-tuong figure{flex:0 0 78%;margin:0;scroll-snap-align:center}
  .tin-tuong img{max-height:440px;width:100%;object-fit:cover;object-position:top}
  .tin-tuong figcaption{font-size:13px;padding:8px 10px}
  .phieu-luoi{grid-template-columns:1fr;gap:10px}
  .can-g{grid-template-columns:1fr}
  .cai-g{grid-template-columns:1fr;gap:20px;margin-top:28px}
  .nguoi-g{grid-template-columns:1fr;gap:18px;text-align:center}
  .nguoi-g img{width:150px;height:150px;margin:0 auto}
  .nguoi-g h2{font-size:34px}
}
@media (max-width:380px){
  .hero h1{font-size:38px}
  .muc h2{font-size:28px}
}
@media (prefers-reduced-motion:reduce){.phim-o video,.hu-luoi video{animation:none}}
.chi-dt-chu{display:none;font:600 13px/1 'Be Vietnam Pro',sans-serif;color:var(--muted);margin-left:6px}
@media (max-width:820px){.chi-dt-chu{display:inline}}

/* v4.1: dễ đọc hơn trên điện thoại (cỡ chữ tối thiểu 13px, vùng bấm tối thiểu ~40px) */
.hoi summary{padding:6px 0}
.dem-the-so small{font-size:12px}
@media (max-width:820px){
  .hero-nhan{font-size:13px}
  .plan .ribbon{font-size:13px}
  .p-gia .giam{font-size:13px}
  .seg button span{font-size:13px}
  .seg button s[data-gia-cu]{font-size:12px}
  .case-ghi a{display:inline-block;padding:4px 0}
}
@media (min-width:600px) and (max-width:820px){.case-luoi{grid-template-columns:1fr 1fr}.kq-luoi{grid-template-columns:1fr 1fr}}
.seg button span{font-size:13.5px}
.seg button s[data-gia-cu]{font-size:12px}
.p-gia .giam{font-size:13px}