:root{
  --navy:#c8102e;      /* đỏ đậm: nền section + heading */
  --navy2:#7c0a10;     /* đỏ đậm hơn: hộp trong nền đỏ */
  --cam:#c8102e;       /* đỏ nút CTA */
  --cam-dam:#a20d25;
  --kem:#fdf1f2;       /* hồng nhạt: nền section xen kẽ */
  --xam:#5b6572;
  --xanh-la:#d31220;   /* dấu ✓ */
  --trang:#ffffff;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Be Vietnam Pro","Segoe UI",sans-serif;color:#222b36;line-height:1.65;background:var(--trang);overflow-x:hidden}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
section{padding:56px 0}
h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;color:var(--navy);line-height:1.3;margin-bottom:18px}
.center{text-align:center}
.cta-btn{display:inline-block;background:var(--cam);color:#fff;font-weight:800;font-size:clamp(15px,2vw,19px);
  padding:16px 34px;border-radius:10px;text-decoration:none;border:none;cursor:pointer;font-family:inherit;
  box-shadow:0 6px 18px rgba(211,18,32,.35);transition:transform .15s, background .15s;text-transform:uppercase;letter-spacing:.3px}
.cta-btn:hover{background:var(--cam-dam);transform:translateY(-2px)}
.nho{font-size:13px;color:var(--xam);margin-top:10px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cam);margin-bottom:10px}

/* HERO */
.hero{position:relative;min-height:80vh;display:flex;align-items:center;color:#fff;padding:72px 0 56px;
  background:linear-gradient(115deg,rgba(124,10,16,.97) 0%,rgba(124,10,16,.88) 42%,rgba(124,10,16,.45) 68%,rgba(124,10,16,.08) 100%),
  url("assets/giau-day-lop.jpg") right top/cover no-repeat}
.hero .badge{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);
  padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:1.2px;margin-bottom:22px}
.hero .wrap{max-width:1320px;width:100%}
.hero h1{font-size:clamp(32px,6.4vw,68px);font-weight:800;line-height:1.12;text-transform:uppercase}
.hero h1 em{font-style:normal;color:#ffd6d6}
.hero .sub2{font-size:clamp(17px,3vw,30px);font-weight:800;color:#fff;margin-top:12px;text-transform:uppercase;letter-spacing:.4px}
.hero .hanhtrinh{font-size:clamp(15px,2vw,20px);color:#ffd6d6;font-weight:600;margin-top:12px;font-style:italic}
.hero p.sub{max-width:760px;margin:20px 0 26px;font-size:clamp(15px,1.9vw,18px);color:#ffeaea}
.hero .giadong{display:inline-flex;align-items:baseline;gap:12px;background:rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.28);
  border-radius:12px;padding:11px 20px;margin-bottom:22px}
.hero .giadong s{color:#e3b3b3;font-size:17px;font-weight:600}
.hero .giadong b{color:#fff;font-size:clamp(24px,3.4vw,32px);font-weight:800}
.hero .giadong span{font-size:13px;color:#ffd6d6;font-weight:600}
.hero .trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:26px}
.hero .trust .t{font-size:14.5px;color:#ffeaea;font-weight:600}
.hero .trust .t b{display:block;font-size:26px;font-weight:800;color:#fff;line-height:1.1}

/* AVATAR 3 cột */
.avatars{background:var(--trang)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.card{background:#fff;border:1px solid #e4e8ee;border-radius:14px;padding:26px 22px;box-shadow:0 3px 14px rgba(18,38,63,.06)}
.card .ic{font-size:30px;margin-bottom:12px}
.card h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.card p{font-size:14.5px;color:var(--xam)}

/* VẤN ĐỀ */
.vande{background:var(--navy);color:#fff}
.vande h2{color:#fff}
.vande-flex{display:grid;grid-template-columns:1.25fr 1fr;gap:36px;align-items:center}
.vande ul{list-style:none;margin-top:6px}
.vande li{padding:11px 0 11px 34px;position:relative;font-size:clamp(15px,1.8vw,17.5px);border-bottom:1px dashed rgba(255,255,255,.15)}
.vande li::before{content:"?";position:absolute;left:0;top:10px;width:24px;height:24px;border-radius:50%;
  background:rgba(255,255,255,.14);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.vande img{border-radius:14px;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.tick{margin-top:24px;background:rgba(255,255,255,.14);border-left:4px solid #fff;padding:16px 18px;border-radius:0 10px 10px 0;font-size:16px}
.chuyen{margin-top:18px;font-size:16px;color:#ffd6d6;font-style:italic}

/* CÂU CHUYỆN */
.story-flex{display:grid;grid-template-columns:1fr 1.2fr;gap:38px;align-items:center}
.story-flex img{border-radius:14px;box-shadow:0 8px 26px rgba(18,38,63,.18)}
.story p{margin-bottom:14px;font-size:16px}
.story .sig{font-weight:700;color:var(--navy)}

/* GIẢI PHÁP */
.giaiphap{background:var(--kem)}
.giaiphap .dan{font-style:italic;color:var(--xam);max-width:760px;margin-bottom:8px}
.days{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:30px 0 34px}
.day{background:#fff;border-top:5px solid var(--navy);border-radius:12px;padding:26px 22px;box-shadow:0 4px 16px rgba(18,38,63,.08)}
.day .num{font-size:13px;font-weight:800;color:var(--cam);letter-spacing:2px}
.day h3{font-size:18px;color:var(--navy);margin:8px 0 10px}
.day p{font-size:14.5px;color:var(--xam)}

/* NỘI DUNG */
.noidung-flex{display:grid;grid-template-columns:1.15fr 1fr;gap:34px;margin-top:8px}
.pills{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:8px}
.pills span{background:var(--kem);color:var(--navy);border:1px solid #f2dcde;border-radius:999px;padding:6px 16px;font-size:13.5px;font-weight:700}
.phanhoc{font-size:13px;font-weight:800;color:var(--cam);letter-spacing:1.4px;text-transform:uppercase;margin:22px 0 4px;display:block}
.phanhoc:first-of-type{margin-top:8px}
.modules{counter-reset:mod}
.modules li{list-style:none;padding:12px 0 12px 46px;position:relative;border-bottom:1px solid #edf0f4;font-size:15.5px}
.modules li::before{counter-increment:mod;content:counter(mod);position:absolute;left:0;top:10px;width:32px;height:32px;
  border-radius:8px;background:var(--navy);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px}
.benefit{background:var(--kem);border-radius:14px;padding:26px 24px;height:fit-content;position:sticky;top:56px}
.benefit h3{color:var(--navy);font-size:18px;margin-bottom:14px}
.benefit li{list-style:none;padding:8px 0 8px 30px;position:relative;font-size:15px}
.benefit li::before{content:"✓";position:absolute;left:0;color:var(--xanh-la);font-weight:800}
.thuchanh{margin-top:38px}
.caption{font-size:13.5px;color:var(--xam);text-align:center;margin-top:10px;font-style:italic}

/* BẰNG CHỨNG */
.bangchung{background:var(--kem)}
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}
.proof-grid img{border-radius:12px;width:100%}
.solieu{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.solieu .s{background:#fff;border:1px solid #f2dcde;border-radius:14px;padding:22px 18px;text-align:center;box-shadow:0 3px 14px rgba(18,38,63,.06)}
.solieu .s b{display:block;font-size:clamp(26px,3.4vw,34px);font-weight:800;color:var(--navy);line-height:1.1}
.solieu .s span{font-size:14px;color:var(--xam);font-weight:600}

/* Ảnh chụp màn hình (bấm để phóng to) */
.shots{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:22px}
.shot{position:relative;display:block;border:1px solid #f2dcde;border-radius:14px;overflow:hidden;
  background:#fff;box-shadow:0 3px 14px rgba(18,38,63,.10);cursor:zoom-in;padding:0}
.shot img{width:100%;height:auto;display:block;transition:transform .25s}
.shot:hover img{transform:scale(1.04)}
.shot .tag{display:block;background:#fff;border-top:1px solid #f2dcde;color:var(--navy);
  font-size:12.5px;font-weight:700;padding:10px 8px;text-align:center;line-height:1.35}
.shots.anh6{grid-template-columns:repeat(3,1fr)}
.shots.anh6 .shot img{aspect-ratio:1;object-fit:cover}
@media(max-width:820px){.shots,.shots.anh6{grid-template-columns:1fr 1fr;gap:12px}}
.lb{position:fixed;inset:0;background:rgba(14,6,7,.94);z-index:9999;display:none;overflow:auto;-webkit-overflow-scrolling:touch}
.lb.on{display:block}
.lb-in{min-height:100%;display:flex;align-items:flex-start;justify-content:center;padding:58px 14px 40px}
.lb img{width:min(94vw,760px);height:auto;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.55)}
.lb-x{position:fixed;top:10px;right:18px;background:none;border:none;color:#fff;font-size:40px;line-height:1;cursor:pointer;z-index:2}
.lb-hint{position:fixed;top:20px;left:0;right:0;text-align:center;color:#ffd9dc;font-size:13px;pointer-events:none}

/* ĐÁNH GIÁ CHỮ */
.reviews{columns:3;column-gap:20px;margin-top:26px}
.rv{break-inside:avoid;-webkit-column-break-inside:avoid;page-break-inside:avoid;
  background:#fff;border:1px solid #f2dcde;border-radius:14px;padding:20px;margin:0 0 20px;box-shadow:0 3px 14px rgba(18,38,63,.06)}
.rv-head{display:flex;align-items:center;gap:11px;margin-bottom:10px}
.rv-ava{width:42px;height:42px;flex:0 0 42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:15px;background:var(--navy)}
.rv-meta b{display:block;font-size:15px;color:#222b36;line-height:1.3;font-weight:700}
.rv-src{font-size:12px;color:var(--xam)}
.rv-star{color:#f5a623;font-size:13px;letter-spacing:2px;margin-bottom:8px}
.rv p{font-size:14.5px;color:#39414d;line-height:1.72}
@media(max-width:980px){.reviews{columns:2}}
@media(max-width:700px){.reviews{columns:1}}

/* KHUNG VIDEO */
.video-gioithieu{max-width:860px;margin:26px auto 0}
.khung169{position:relative;padding-top:56.25%;border-radius:16px;overflow:hidden;box-shadow:0 12px 34px rgba(94,7,12,.3)}
.khung169 iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.videos-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:880px;margin:26px auto 0}
.videos-row .khung{position:relative;padding-top:177.78%;border-radius:14px;overflow:hidden;box-shadow:0 8px 26px rgba(94,7,12,.25)}
.khung iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-cho{background:#fff;border:2px dashed #e7b9bd;color:var(--navy);border-radius:16px;padding:46px 30px;text-align:center;margin-top:22px}
.video-cho .play{width:66px;height:66px;border-radius:50%;background:var(--kem);margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-size:26px}
.video-cho p{font-size:15px;color:var(--xam);margin-top:6px}

/* BIO */
.bio-flex{display:grid;grid-template-columns:1fr 1.35fr;gap:38px;align-items:center}
.bio-flex img{border-radius:14px;box-shadow:0 8px 26px rgba(18,38,63,.18)}
.bio p{margin-bottom:13px;font-size:16px}

/* OFFER */
.offer{background:var(--navy);color:#fff}
.offer h2{color:#fff}
.stack{max-width:660px;margin:26px auto 0;background:var(--navy2);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:30px 28px}
.stack .row{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.14);font-size:15.5px}
.stack .row .gia{color:#ffd9cb;white-space:nowrap;font-weight:600}
.stack .tong{display:flex;justify-content:space-between;padding-top:18px;font-size:17px}
.stack .tong .gach{text-decoration:line-through;color:#e0b3b3}
.stack .homnay{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:19px;font-weight:800}
.stack .homnay .gia-ban{color:#ffb07a;font-size:clamp(24px,3vw,32px)}
.quydoi{text-align:center;color:#ffd6d6;font-size:14.5px;margin-top:16px}
.bangiao{max-width:760px;margin:26px auto 0;background:var(--navy2);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:26px 28px}
.bangiao h3{font-size:17px;margin-bottom:12px;color:#ffd6d6}
.bangiao li{list-style:none;padding:8px 0 8px 30px;position:relative;font-size:15px}
.bangiao li::before{content:"✓";position:absolute;left:0;color:#fff;font-weight:800}

/* CAM KẾT */
.camket .box{max-width:720px;margin:0 auto;border:2px solid var(--xanh-la);border-radius:14px;padding:30px 28px;text-align:center;background:#fff7f7}
.camket .shield{font-size:34px;margin-bottom:10px}
.camket .loi{font-size:17px;font-weight:600;color:var(--navy)}
.camket .dieukien{font-size:14.5px;color:var(--xam);margin-top:12px}

/* FORM + FAQ */
.chot{background:linear-gradient(180deg,var(--navy) 0%,var(--navy2) 100%);color:#fff}
.chot h2{color:#fff}
.chot .lead{max-width:640px;margin:0 auto;color:#ffeaea;font-size:16px}
.form-box{max-width:520px;margin:26px auto 0;background:#fff;border-radius:16px;padding:32px 28px;color:#222b36;box-shadow:0 16px 44px rgba(0,0,0,.35)}
.form-box .giaform{display:flex;align-items:baseline;justify-content:center;gap:12px;margin-bottom:6px}
.form-box .giaform s{color:#9aa5b1;font-size:17px;font-weight:600}
.form-box .giaform b{color:var(--cam);font-size:32px;font-weight:800}
.form-box label{display:block;font-size:13.5px;font-weight:700;color:var(--navy);margin:14px 0 6px}
.form-box input{width:100%;padding:13px 14px;border:1.5px solid #d6dce4;border-radius:9px;font-size:15px;font-family:inherit}
.form-box input:focus{outline:none;border-color:var(--cam)}
.form-box .cta-btn{width:100%;margin-top:22px;text-align:center}
.form-box .err{display:none;color:#c62828;font-size:13.5px;font-weight:600;margin-top:10px}
.form-box .err.show{display:block}
.suat{text-align:center;color:#ffd6d6;font-weight:800;font-size:15.5px;margin-top:18px}
.faq{max-width:720px;margin:44px auto 0}
.faq h3{color:#fff;font-size:20px;margin-bottom:16px;text-align:center}
.faq details{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:10px;margin-bottom:10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:600;padding:15px 0;font-size:15.5px;list-style:none;position:relative;padding-right:28px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:2px;top:12px;font-size:20px;color:#ffd6d6}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 16px;color:#ffe4e4;font-size:14.5px}

/* ĐỒNG HỒ ĐẾM NGƯỢC */
.countdown{display:flex;gap:10px;justify-content:center;margin:18px 0 4px}
.cd-box{background:#fff;color:var(--cam-dam);border-radius:10px;min-width:64px;padding:10px 6px;text-align:center;box-shadow:0 6px 18px rgba(0,0,0,.25)}
.cd-box b{display:block;font-size:26px;line-height:1.1;font-variant-numeric:tabular-nums}
.cd-box span{font-size:11px;color:#8a94a1;text-transform:uppercase;letter-spacing:1px}
.cd-title{text-align:center;color:#ffd6d6;font-size:14px;font-weight:600}

/* FOOTER */
footer{background:#5e070c;color:#f0c2c2;font-size:13px;padding:34px 0;text-align:center}
footer a{color:#ffe0e0;text-decoration:none;margin:0 8px}
footer .pays{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:14px 0}
footer .pays span{border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:4px 14px;font-size:12.5px}

/* NÚT "BUM" */
@keyframes bum{
  0%{transform:scale(1);box-shadow:0 6px 18px rgba(211,18,32,.35),0 0 0 0 rgba(211,18,32,.55)}
  60%{transform:scale(1.035);box-shadow:0 6px 18px rgba(211,18,32,.35),0 0 0 16px rgba(211,18,32,0)}
  100%{transform:scale(1);box-shadow:0 6px 18px rgba(211,18,32,.35),0 0 0 0 rgba(211,18,32,0)}
}
.cta-btn{animation:bum 1.8s infinite}
.cta-btn:hover{animation-play-state:paused}
.btn-wrap{display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:30px}

/* DOCK NÚT NỔI: Zalo + Trợ lý */
.float-dock{position:fixed;right:14px;bottom:18px;z-index:97;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.fbtn{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:22px;color:#fff;cursor:pointer;border:none;box-shadow:0 8px 22px rgba(0,0,0,.3);text-decoration:none}
.fbtn.zalo{background:#0068ff}
.fbtn.chat{background:var(--cam);animation:bum 2.2s infinite}

/* HỘP TRỢ LÝ HỎI ĐÁP */
.chatbox{position:fixed;right:14px;bottom:88px;z-index:98;width:min(340px,calc(100vw - 28px));background:#fff;border-radius:16px;
  box-shadow:0 16px 44px rgba(0,0,0,.35);display:none;flex-direction:column;overflow:hidden}
.chatbox.open{display:flex}
.chatbox .ch-head{background:var(--navy);color:#fff;padding:13px 16px;font-weight:700;font-size:15px;display:flex;justify-content:space-between;align-items:center}
.chatbox .ch-head button{background:none;border:none;color:#ffd6d6;font-size:18px;cursor:pointer}
.chatbox .ch-msgs{padding:14px;height:280px;overflow-y:auto;background:#fdf6f6}
.ch-msg{max-width:86%;padding:9px 12px;border-radius:12px;margin-bottom:9px;font-size:13.5px;line-height:1.55}
.ch-msg.bot{background:#fff;border:1px solid #f0dcdc;color:#333;border-bottom-left-radius:4px}
.ch-msg.user{background:var(--cam);color:#fff;margin-left:auto;border-bottom-right-radius:4px}
.ch-chips{display:flex;flex-wrap:wrap;gap:7px;padding:0 14px 12px;background:#fdf6f6}
.ch-chips button{border:1.5px solid var(--cam);color:var(--cam-dam);background:#fff;border-radius:999px;padding:6px 11px;font-size:12.5px;font-weight:600;cursor:pointer;font-family:inherit}

/* placeholder CHỜ DATA */
.cho-data{background:#fff3c4;color:#7a5b00;border-radius:5px;padding:1px 7px;font-size:.9em;font-weight:600}

/* MODAL QR THANH TOÁN */
.overlay{position:fixed;inset:0;background:rgba(14,6,7,.9);z-index:9998;display:none;overflow-y:auto;padding:20px 14px}
.overlay.show{display:block}
.pay{max-width:460px;margin:0 auto;background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.pay .ph{background:var(--navy);color:#fff;padding:18px 22px;position:relative}
.pay .ph h3{font-size:19px;font-weight:800}
.pay .ph .amt{font-size:13.5px;color:#ffd6d6;margin-top:4px}
.pay .ph .x{position:absolute;top:12px;right:14px;background:none;border:none;color:#fff;font-size:22px;cursor:pointer;line-height:1}
.pay .body{padding:22px}
.pay .body p{font-size:15px;color:#39414d;margin-bottom:14px}
.pay input{width:100%;padding:13px 14px;border:1.5px solid #d6dce4;border-radius:9px;font-size:15px;font-family:inherit;margin-bottom:10px}
.pay input:focus{outline:none;border-color:var(--cam)}
.pay .lbtn{width:100%;background:var(--cam);color:#fff;border:none;border-radius:10px;padding:15px;font-size:16px;font-weight:800;cursor:pointer;font-family:inherit}
.leaderr{display:none;color:#c62828;font-size:13.5px;font-weight:600;margin-bottom:10px}
.leaderr.show{display:block}
.qrbox{text-align:center;background:var(--kem);border-radius:14px;padding:18px;margin-bottom:16px}
.qrbox img{width:min(240px,70%);margin:0 auto;border-radius:10px;background:#fff}
.qrbox .hint{font-size:13px;color:var(--xam);margin-top:10px}
.rows .row{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed #e6e9ee;font-size:14.5px}
.rows .lbl{color:var(--xam)}
.rows .val{font-weight:700;text-align:right}
.rows .val .big{color:var(--cam);font-size:17px}
.copy{border:1px solid #d6dce4;background:#fff;border-radius:6px;font-size:11.5px;padding:2px 7px;cursor:pointer;margin-left:6px;font-family:inherit}
.steps{margin-top:16px}
.steps .st{display:flex;gap:10px;align-items:flex-start;font-size:14px;margin-bottom:9px;color:#39414d}
.steps .st b{flex:0 0 22px;height:22px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12.5px}
.zbtn{display:block;text-align:center;background:#0068ff;color:#fff;font-weight:800;text-decoration:none;border-radius:10px;padding:14px;margin-top:16px;font-size:15px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:30px;background:#222b36;color:#fff;padding:11px 20px;border-radius:999px;font-size:14px;z-index:10000;opacity:0;transition:opacity .2s;pointer-events:none}
.toast.show{opacity:1}

@media(max-width:820px){
  section{padding:42px 0}
  .grid3,.days,.solieu{grid-template-columns:1fr}
  .vande-flex,.story-flex,.noidung-flex,.bio-flex,.proof-grid{grid-template-columns:1fr}
  .benefit{position:static}
  .hero{min-height:auto;padding:56px 0 44px;text-align:center;
    background:linear-gradient(180deg,rgba(124,10,16,.92) 0%,rgba(124,10,16,.78) 46%,rgba(124,10,16,.42) 78%,rgba(124,10,16,.55) 100%),url("assets/giau-day-lop.jpg") 60% top/cover no-repeat}
  .hero p.sub{margin:20px auto 26px}
  .hero .trust{justify-content:center}
  .videos-row{grid-template-columns:1fr;max-width:340px}
  .story-flex img,.bio-flex img{max-width:440px;margin:0 auto}
}

/* ===== 4 KHOÁ (kiểu hạng vé của trang mẫu) ===== */
.khoas{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:stretch;margin-top:26px}
.the-khoa{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid #e9dcde;border-radius:16px;padding:22px 18px 20px;box-shadow:0 6px 20px rgba(200,16,46,.06)}
.the-khoa.nhan-manh{border:2px solid var(--navy);box-shadow:0 12px 30px rgba(200,16,46,.16)}
.the-khoa .nhan{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;font-size:11.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;padding:5px 12px;border-radius:999px;white-space:nowrap}
.the-khoa .so-khoa{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--navy)}
.the-khoa h3{font-size:19px;line-height:1.3;margin:6px 0 4px;color:#16181d}
.the-khoa .hinh{font-size:13px;color:var(--xam);margin:0 0 12px}
.the-khoa .gia{font-size:30px;font-weight:900;color:var(--navy);line-height:1.1;margin:0 0 4px}
.the-khoa .gia small{display:block;font-size:12.5px;font-weight:600;color:var(--xam);margin-top:4px}
.the-khoa ul{list-style:none;padding:0;margin:14px 0 18px;display:grid;align-content:start;gap:9px;font-size:14.5px;color:#39414d;flex:1}
.the-khoa li{padding-left:24px;position:relative;line-height:1.5}
.the-khoa li::before{content:"✓";position:absolute;left:0;top:0;color:var(--navy);font-weight:900}
.the-khoa .cta-btn{width:100%;text-align:center;font-size:14px;padding:13px 10px}
.the-khoa .ghichu{font-size:12.5px;color:var(--xam);text-align:center;margin:10px 0 0}
.mang-ve{background:var(--kem);border:1px solid #f0d8da;border-radius:16px;padding:22px 24px;margin-top:26px}
.mang-ve h3{margin:0 0 12px;font-size:18px}
.mang-ve ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;font-size:15px}
.mang-ve li{padding-left:26px;position:relative}
.mang-ve li::before{content:"📦";position:absolute;left:0}
.lich-hoc{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.lich-hoc .o{border:1px dashed #e3c9cc;border-radius:14px;padding:18px 20px;background:#fff}
.lich-hoc h3{margin:0 0 6px;font-size:16px;color:var(--navy)}
.lich-hoc p{margin:0;color:#39414d;font-size:14.5px}
/* ===== KHUNG MÃ HỌC ===== */
.ma-hoc{display:inline-flex;align-items:center;gap:12px;background:#16181d;border-radius:14px;padding:12px 22px;margin:4px 0 2px}
.ma-hoc b{font-size:38px;font-weight:900;letter-spacing:.14em;color:#ffd43b;line-height:1.1}
.chep{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;border-radius:8px;font-size:12px;padding:4px 10px;cursor:pointer}
.cam-on{text-align:center}
.cam-on .tick{width:64px;height:64px;border-radius:50%;background:var(--kem);color:var(--navy);display:grid;place-items:center;font-size:32px;margin:2px auto 12px}
@media (max-width:1020px){.khoas{grid-template-columns:repeat(2,1fr)}}
@media (max-width:760px){.khoas,.mang-ve ul,.lich-hoc{grid-template-columns:1fr}}

/* ===== KHUNG ĐĂNG KÝ (tự viết, nền trắng theo tông trang mẫu) ===== */
[hidden]{display:none!important}
.phu{position:fixed;inset:0;z-index:100;background:rgba(22,24,29,.6);display:flex;align-items:center;justify-content:center;padding:16px}
.hop{background:#fff;border-radius:18px;width:100%;max-width:460px;max-height:92vh;overflow:auto;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.hop .dau{background:var(--navy);color:#fff;padding:20px 56px 16px 22px}
.hop .dau h3{margin:0;font-size:19px;color:#fff}
.hop .dau p{margin:4px 0 0;color:#ffd6d6;font-weight:700}
.hop .than{padding:20px 22px 22px}
.hop .dong-x{position:absolute;right:12px;top:12px;width:34px;height:34px;border-radius:50%;border:0;background:rgba(255,255,255,.2);color:#fff;font-size:18px;cursor:pointer}
.hop input{width:100%;margin:0 0 10px;border:1.5px solid #d6dce4;border-radius:9px;padding:13px 14px;font:inherit;font-size:15px}
.hop input:focus{outline:none;border-color:var(--cam)}
.hop .loi{color:#c62828;font-size:14px;min-height:1.2em;margin:0 0 8px;font-weight:600}
.hop .nut{width:100%}
.hop .nho{font-size:12.5px;color:var(--xam);text-align:center;margin:10px 0 0}
.nut-zalo{display:block;text-align:center;background:#0068ff;color:#fff;text-decoration:none;font-weight:800;font-size:15px;padding:14px;border-radius:10px}
.bay{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.zalo-noi{position:fixed;right:16px;bottom:18px;z-index:60;width:56px;height:56px;border-radius:50%;background:#0068ff;color:#fff;display:grid;place-items:center;font-weight:800;font-size:13px;text-decoration:none;box-shadow:0 10px 24px rgba(0,104,255,.45)}
.xem-anh{position:fixed;inset:0;z-index:110;background:rgba(0,0,0,.9);display:flex;align-items:center;justify-content:center;padding:20px;cursor:zoom-out}
.xem-anh img{max-height:90vh;border-radius:10px}

/* ===== CHẶN TRÀN NGANG TRÊN ĐIỆN THOẠI ===== */
img{max-width:100%;height:auto}
.story-flex img,.bio-flex img,.vande-flex img{max-width:min(440px,100%)!important;width:100%}
.story-flex,.bio-flex,.vande-flex{max-width:100%}
body{overflow-x:hidden}