/* K1 · 28 Ngày Video Bán Hàng — kiểu chung trang bán + trang cảm ơn.
   Màu và chữ theo Brand Guideline Chung: Be Vietnam Pro; xanh #214099, đỏ #BE1E2D, kem #F2D9A6, nền #FBF6EC. */
@font-face{font-family:'Be Vietnam Pro';font-weight:500;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-500-normal-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-weight:500;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-500-normal-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-weight:500;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-500-normal-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Be Vietnam Pro';font-weight:800;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-800-normal-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-weight:800;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-800-normal-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-weight:800;font-display:swap;src:url(/28-ngay-video-ban-hang/font/BeVietnamPro-800-normal-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --xanh:#214099; --xanh-dam:#16275E; --do:#BE1E2D; --kem:#F2D9A6; --nen:#FBF6EC; --trang:#fff;
  --chu:#16275E; --chu-nhat:#4a5578; --vien:#e6d6b3;
  --bo:14px; --rong:720px;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--nen);color:var(--chu);font:500 18px/1.65 'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif}
img{max-width:100%;display:block;height:auto}
a{color:var(--xanh)}
h1,h2,h3{font-weight:800;line-height:1.25;margin:0 0 .5em;color:var(--xanh)}
h1{font-size:clamp(30px,7vw,48px)}
h2{font-size:clamp(25px,5.6vw,34px)}
h3{font-size:20px;color:var(--xanh-dam)}
p{margin:0 0 1em}
strong{font-weight:800}
.khung{max-width:var(--rong);margin:0 auto;padding:0 18px}
.khoi{padding:48px 0;border-top:1px solid var(--vien)}
.khoi:first-of-type{border-top:0}
.nhan{display:inline-block;font-size:14px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--do);margin-bottom:10px}
.phu{color:var(--chu-nhat);font-size:16px}
.nho{font-size:15px;color:var(--chu-nhat)}

/* Thanh trên cùng */
.thanh-tren{background:var(--xanh);color:#fff;font-size:15px;text-align:center;padding:9px 14px}
.thanh-tren b{color:var(--kem)}

/* Màn đầu */
.man-dau{background:var(--xanh);color:#fff;padding:28px 0 40px;position:relative;overflow:hidden}
.man-dau:after{content:"";position:absolute;left:0;right:0;bottom:0;height:14px;background:repeating-linear-gradient(90deg,var(--do) 0 28px,var(--kem) 28px 56px);opacity:.9}
.man-dau .luoi{display:grid;gap:22px;align-items:center}
.man-dau h1{color:#fff;margin-bottom:.35em}
.man-dau .tinh-than{font-size:clamp(19px,4.6vw,23px);line-height:1.5;color:var(--kem);margin-bottom:18px}
.man-dau .anh-dau{border-radius:var(--bo);overflow:hidden;max-width:420px;margin:0 auto;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.the-loi{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:10px}
.the-loi li{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:12px;padding:10px 14px 10px 44px;position:relative;font-size:17px;line-height:1.45}
.the-loi li:before{content:"✓";position:absolute;left:14px;top:9px;width:22px;height:22px;border-radius:50%;background:var(--kem);color:var(--xanh);font-weight:800;font-size:14px;display:grid;place-items:center}
@media(min-width:860px){.man-dau .luoi{grid-template-columns:1.15fr .85fr}.khung.rong{max-width:1040px}}

/* Nút */
.nut{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:54px;padding:12px 26px;border-radius:999px;background:var(--do);color:#fff;font-family:inherit;font-weight:800;font-size:18px;line-height:1.2;text-decoration:none;border:0;cursor:pointer;box-shadow:0 6px 16px rgba(190,30,45,.28);text-align:center}
.nut:hover{filter:brightness(1.06)}
.nut:focus-visible{outline:3px solid var(--kem);outline-offset:3px}
.nut.phu-nut{background:#fff;color:var(--xanh);box-shadow:none;border:2px solid var(--xanh)}
.nut[disabled]{opacity:.6;cursor:wait}
.hang-nut{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* Bộ đếm suất */
.dem{display:inline-flex;flex-wrap:wrap;gap:6px 14px;align-items:center;background:#fff;color:var(--xanh-dam);border-radius:12px;padding:10px 14px;font-size:16px;margin-top:14px}
.dem b{color:var(--do);font-size:20px}
.man-dau .dem{background:rgba(255,255,255,.95)}

/* Ảnh có chú thích */
figure{margin:22px 0}
figure img{border-radius:var(--bo)}
figcaption{font-size:14px;color:var(--chu-nhat);margin-top:8px}
.luoi-anh{display:grid;gap:12px;grid-template-columns:repeat(3,1fr)}
.luoi-anh img{border-radius:10px;aspect-ratio:9/16;object-fit:cover;width:100%}
.luoi-2{display:grid;gap:14px;grid-template-columns:1fr 1fr}
.luoi-2 img{border-radius:10px;aspect-ratio:3/4;object-fit:cover;width:100%}

/* Danh sách đầu ra */
.dau-ra{list-style:none;padding:0;margin:0;display:grid;gap:12px;counter-reset:dr}
.dau-ra li{background:#fff;border:1px solid var(--vien);border-radius:12px;padding:14px 16px 14px 62px;position:relative;counter-increment:dr}
.dau-ra li:before{content:counter(dr);position:absolute;left:14px;top:14px;width:34px;height:34px;border-radius:50%;background:var(--xanh);color:#fff;font-weight:800;display:grid;place-items:center}
.dau-ra b{display:block;color:var(--xanh);font-size:19px}

/* Hợp / chưa hợp */
.hai-cot{display:grid;gap:14px}
@media(min-width:700px){.hai-cot{grid-template-columns:1fr 1fr}}
.the{background:#fff;border:1px solid var(--vien);border-radius:var(--bo);padding:18px}
.the h3{margin-bottom:.4em}
.the ul{margin:0;padding-left:20px}
.the li{margin:6px 0}
.the.chua h3{color:var(--chu-nhat)}

/* 4 tuần */
.tuan{display:grid;gap:12px}
.tuan .o{background:#fff;border-left:6px solid var(--xanh);border-radius:10px;padding:14px 16px}
.tuan .o:nth-child(2){border-color:var(--do)}
.tuan .o:nth-child(3){border-color:#c9a45c}
.tuan .o:nth-child(4){border-color:var(--xanh-dam)}
.tuan .o .so{font-size:13px;font-weight:800;color:var(--do);letter-spacing:.05em;text-transform:uppercase}
.tuan .o h3{margin:.15em 0 .3em}
.tuan .o p{margin:0;font-size:16px}

/* Một ngày học */
.nhip{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.nhip li{display:grid;grid-template-columns:96px 1fr;gap:12px;align-items:start;background:#fff;border-radius:10px;padding:12px 14px;border:1px solid var(--vien)}
.nhip .gio{font-weight:800;color:var(--xanh)}

/* Lịch Zoom */
.bang{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;font-size:16px}
.bang th,.bang td{padding:9px 10px;border-bottom:1px solid #efe4cc;text-align:left;vertical-align:top}
.bang th{background:var(--kem);color:var(--xanh-dam);font-weight:800}
.bang tr:last-child td{border-bottom:0}
.bang .dac td{background:#fff6e9;font-weight:800}

/* Học phí */
.gia{display:grid;gap:12px}
@media(min-width:760px){.gia{grid-template-columns:repeat(3,1fr)}}
.gia .muc{background:#fff;border:2px solid var(--vien);border-radius:var(--bo);padding:18px;position:relative}
.gia .muc .ten{font-weight:800;color:var(--xanh-dam)}
.gia .muc .so-tien{font-size:28px;font-weight:800;color:var(--xanh);line-height:1.2;margin:4px 0}
.gia .muc .con{font-size:15px;color:var(--chu-nhat)}
.gia .muc.mo{border-color:var(--do);box-shadow:0 8px 22px rgba(190,30,45,.12)}
.gia .muc.mo:before{content:"Đang mở";position:absolute;top:-12px;left:16px;background:var(--do);color:#fff;font-size:13px;font-weight:800;padding:3px 10px;border-radius:999px}
.gia .muc.het{opacity:.55}

/* Báo chí */
.bao{display:grid;gap:16px}
@media(min-width:700px){.bao{grid-template-columns:1fr 1fr}}
.bao figure{margin:0;background:#fff;border:1px solid var(--vien);border-radius:var(--bo);padding:10px}
.bao img{border-radius:8px}

/* Câu hỏi */
details{background:#fff;border:1px solid var(--vien);border-radius:12px;margin:0 0 10px;padding:0 16px}
summary{cursor:pointer;font-weight:800;color:var(--xanh-dam);padding:14px 0;list-style:none;position:relative;padding-right:28px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:0;top:10px;font-size:24px;color:var(--do)}
details[open] summary:after{content:"–"}
details p:last-child{margin-bottom:14px}

/* Form */
.form{background:#fff;border:2px solid var(--xanh);border-radius:18px;padding:22px 18px}
.form label{display:block;font-weight:800;color:var(--xanh-dam);margin:14px 0 6px;font-size:17px}
.form .goi-y{font-weight:500;color:var(--chu-nhat);font-size:14px}
.form input[type=text],.form input[type=tel],.form input[type=email],.form select,.form textarea{width:100%;font-family:inherit;font-weight:500;font-size:18px;line-height:1.4;color:var(--chu);padding:12px 14px;border:1.5px solid #cdbf9f;border-radius:10px;background:#fffdf8}
.form textarea{min-height:84px;resize:vertical}
.form input:focus,.form select:focus,.form textarea:focus{outline:3px solid rgba(33,64,153,.25);border-color:var(--xanh)}
.lua-chon{display:flex;flex-wrap:wrap;gap:10px}
.lua-chon label{display:flex;align-items:center;gap:8px;margin:0;font-weight:500;border:1.5px solid #cdbf9f;border-radius:999px;padding:9px 16px;cursor:pointer;background:#fffdf8}
.lua-chon input{width:18px;height:18px}
.dong-y{display:flex;gap:10px;align-items:flex-start;margin:14px 0 0;font-weight:500 !important;font-size:16px !important;color:var(--chu) !important;cursor:pointer}
.dong-y input{width:22px;height:22px;flex:0 0 22px;margin-top:2px}
.o-an{position:absolute !important;left:-9999px !important;width:1px;height:1px;overflow:hidden}
.loi{color:var(--do);font-weight:800;font-size:16px;margin-top:12px;min-height:1em}
.gia-form{background:var(--nen);border-radius:12px;padding:12px 14px;margin:16px 0 6px;font-size:16px}
.gia-form b{color:var(--do);font-size:20px}
.dieu-khoan{font-size:15px;background:var(--nen);border-radius:10px;padding:12px 14px;margin-top:8px}

/* Chân trang */
.chan{background:var(--xanh-dam);color:#e9ecf7;padding:34px 0 90px;font-size:15px}
.chan a{color:var(--kem)}
.chan .dong{margin:0 0 8px}

/* Nút dính dưới điện thoại */
.nut-dinh{position:fixed;left:0;right:0;bottom:0;z-index:20;background:rgba(251,246,236,.97);border-top:1px solid var(--vien);padding:10px 14px calc(10px + env(safe-area-inset-bottom));display:flex;gap:10px;align-items:center;justify-content:space-between;transform:translateY(110%);transition:transform .25s}
.nut-dinh.hien{transform:none}
.nut-dinh .nho{line-height:1.3}
.nut-dinh .nut{min-height:46px;padding:10px 18px;font-size:16px;flex:0 0 auto}
@media(min-width:900px){.nut-dinh{display:none}}

/* Trang cảm ơn */
.qr-khung{background:#fff;border:2px solid var(--xanh);border-radius:18px;padding:18px;text-align:center}
.qr-khung img.qr{width:min(300px,78vw);height:auto;margin:6px auto 10px;image-rendering:pixelated}
.qr-dong{display:grid;grid-template-columns:88px 1fr auto;gap:8px;align-items:center;text-align:left;border-top:1px solid #efe4cc;padding:9px 0;font-size:15px}
.qr-dong .k{color:var(--chu-nhat);font-size:13px;line-height:1.3}
.qr-dong .v{font-weight:800;overflow-wrap:anywhere;line-height:1.35}
.qr-dong .v.so{white-space:nowrap;overflow-wrap:normal;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.chep{font-family:inherit;font-weight:800;font-size:13px;line-height:1;border:1.5px solid var(--xanh);color:var(--xanh);background:#fff;border-radius:999px;padding:7px 10px;cursor:pointer}
.buoc{list-style:none;padding:0;margin:0;display:grid;gap:10px;counter-reset:b}
.buoc li{background:#fff;border:1px solid var(--vien);border-radius:12px;padding:12px 14px 12px 54px;position:relative;counter-increment:b}
.buoc li:before{content:counter(b);position:absolute;left:14px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--do);color:#fff;font-weight:800;display:grid;place-items:center;font-size:15px}
.zalo-khung{background:#fff;border:1px solid var(--vien);border-radius:18px;padding:18px;margin-top:18px}
.nut.zalo{background:#0068ff;box-shadow:0 6px 16px rgba(0,104,255,.25)}
a[data-tel]{white-space:nowrap}

/* ---- Bản 2: theo bản hợp nhất ---- */
.man-dau .luoi{grid-template-areas:"chu" "anh" "the"}
.man-dau .luoi>div:first-child{grid-area:chu}
.man-dau .anh-dau{grid-area:anh;max-width:340px}
.man-dau .the-dau{grid-area:the}
@media(min-width:860px){.man-dau .luoi{grid-template-columns:1.15fr .85fr;grid-template-areas:"chu anh" "the anh"}.man-dau .anh-dau{max-width:420px}}
.man-dau h1{font-size:clamp(28px,6.4vw,46px)}
.phu-dau{color:#fff;font-size:18px;margin:0}
.the-loi li b{display:block;font-weight:800;color:#fff}
.the-loi li>span{display:block;font-size:15px;color:#dfe5f7;margin-top:2px}
.dem{display:flex;flex-direction:column;gap:2px}
.dem small{font-size:15px;color:var(--chu-nhat)}
.dem-chu b{color:var(--do)}
.slide{background:#fff;border:1px solid var(--vien);border-left:8px solid var(--do);border-radius:12px;padding:14px 16px;margin:18px 0}
.slide-tieu{font-weight:800;color:var(--xanh);font-size:18px;margin-bottom:8px}
.slide-buoc{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.slide-buoc li{background:var(--nen);border-radius:10px;padding:8px;text-align:center;font-size:14px;line-height:1.3}
.slide-buoc b{display:block;color:var(--xanh-dam);font-size:15px}
@media(max-width:420px){.slide-buoc{grid-template-columns:1fr 1fr}}
.anh-doc{max-width:300px;margin-left:auto;margin-right:auto}
.anh-doc img{aspect-ratio:9/16;object-fit:cover;width:100%}
.anh-video{margin-top:18px}
.anh-video figure{margin:0}
.anh-video img{aspect-ratio:9/16}
.khung-bao{border-left:4px solid var(--xanh);background:#fff;border-radius:0 12px 12px 0;padding:14px 16px 2px;margin:18px 0}
.lich{display:grid;gap:8px;margin:16px 0 6px}
.lich-tuan{display:grid;gap:4px}
.lich-ten{font-size:13px;font-weight:800;color:var(--do);text-transform:uppercase;letter-spacing:.04em}
.lich-hang{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.lich-o{background:#fff;border:1px solid var(--vien);border-radius:8px;padding:5px 3px;text-align:center;min-height:62px;display:flex;flex-direction:column;align-items:center;gap:1px}
.lich-o.co-zoom{background:var(--xanh);border-color:var(--xanh);color:#fff}
.lich-so{font-weight:800;font-size:16px;line-height:1.1}
.lich-ngay{font-size:11px;line-height:1.2;opacity:.9}
.lich-zoom{font-size:10px;line-height:1.15;font-weight:800;color:var(--kem)}
.lich-ds{list-style:none;padding:0;margin:6px 0 20px;display:grid;gap:4px;font-size:16px}
.lich-ds li{background:#fff;border:1px solid var(--vien);border-radius:8px;padding:6px 12px}
.lich-ds b{color:var(--xanh)}
.chu-lich{margin-bottom:20px}
.tuan .o ol{margin:8px 0 0;padding-left:28px;font-size:16px}
.tuan .o ol li{margin:3px 0}
.tuan .o .duoc{font-size:15px;color:var(--chu-nhat);margin:4px 0 0}
.luat{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.luat li{background:#fff;border:1px solid var(--vien);border-radius:10px;padding:10px 14px}
.luat b{color:var(--xanh)}
.giu,.cach-dong{padding-left:22px}
.giu li,.cach-dong li{margin:6px 0}
.loi-moi{background:var(--kem)}
.loi-moi h2{color:var(--xanh-dam)}
.ky{font-weight:800;color:var(--xanh)}
.nho-nut{min-height:42px;padding:8px 16px;font-size:15px}
.het-han-dk{background:#fff;border:2px solid var(--do);border-radius:14px;padding:16px 18px;font-size:18px}