:root{
  --tim:#7462f9; --xanh:#227df9; --hong:#df3ef8; --vang:#ffcd17;
  --den:#1f2022; --than:#272634;
  --chu:#26262e; --chu-nhat:#5b5b6b; --vien:#e6e6ef;
  --nen:#fff; --nen-diu:#f6f6fb;
  --ok:#22a35f; --do:#d94848;
  --grad:linear-gradient(115deg,#7462f9 0%,#227df9 55%,#df3ef8 100%);
  --bo:16px; --rong:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  color:var(--chu);background:var(--nen);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
.bao{width:100%;max-width:var(--rong);margin:0 auto;padding:0 24px}

/* ===== Thanh đầu — dựng theo header trang chủ cybersoft.edu.vn ===== */
.cs-top{background:#fff;border-bottom:1px solid #ececf2;font-size:13px}
.cs-top .bao{display:flex;align-items:center;justify-content:flex-end;gap:22px;height:34px}
.cs-top a{color:#2b2b33;text-decoration:none;font-weight:500;white-space:nowrap}
.cs-top a:hover{color:var(--tim)}
.cs-hotline{display:inline-flex;align-items:center;gap:7px;border:1px solid #e0554f;color:#d9433c !important;
  border-radius:999px;padding:3px 13px;font-weight:600}
.cs-hotline:hover{background:#fdf0ef}

.cs-chinh{background:#402011;border-top:3px solid #f0b400;position:relative;z-index:55}
.cs-chinh .bao{display:flex;align-items:center;gap:26px;height:66px}
.cs-logo img{height:46px;width:auto}
.cs-menu{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1}
.cs-menu a{color:#fff;text-decoration:none;font-size:13.5px;font-weight:700;text-transform:uppercase;
  letter-spacing:.4px;padding:9px 13px;border-radius:6px;white-space:nowrap;transition:background .15s}
.cs-menu a:hover{background:rgba(255,255,255,.12)}
.cs-nut{display:inline-flex;align-items:center;background:#f0b400;color:#402011 !important;
  font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.4px;
  padding:11px 20px;border-radius:4px;text-decoration:none;white-space:nowrap;
  box-shadow:0 3px 12px rgba(240,180,0,.34);transition:background .15s,transform .15s}
.cs-nut:hover{background:#ffc61a;transform:translateY(-1px)}

/* Thanh mục lục của riêng trang này, dính lại khi cuộn */
.dau{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--vien)}
.dau .bao{display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px}
.dau-menu{display:flex;gap:2px;flex:1}
.dau-menu a{padding:8px 13px;border-radius:8px;font-size:14px;font-weight:600;
  color:var(--chu-nhat);text-decoration:none;white-space:nowrap}
.dau-menu a:hover{background:var(--nen-diu);color:var(--chu)}
.dau-nut{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:999px;
  background:var(--grad);color:#fff;font-weight:600;font-size:14.5px;text-decoration:none;
  box-shadow:0 6px 18px rgba(116,98,249,.32);white-space:nowrap;transition:transform .15s,box-shadow .15s}
.dau-nut:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(116,98,249,.42)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:var(--den);color:#fff;padding:84px 0 96px}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(900px 460px at 12% -10%,rgba(116,98,249,.55),transparent 62%),
             radial-gradient(760px 420px at 88% 8%,rgba(223,62,248,.34),transparent 60%),
             radial-gradient(680px 400px at 55% 110%,rgba(34,125,249,.36),transparent 62%)}
.hero .bao{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:54px;align-items:center}
.the-nho{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  font-size:13px;font-weight:600;letter-spacing:.3px;margin-bottom:22px}
.cham{width:8px;height:8px;border-radius:50%;background:var(--vang);box-shadow:0 0 0 4px rgba(255,205,23,.22)}
.hero h1{margin:0 0 20px;font-size:clamp(32px,4.5vw,53px);line-height:1.14;font-weight:800;letter-spacing:-.6px}
.hero h1 em{font-style:normal;background:linear-gradient(96deg,var(--vang),#ffa53d);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:0 0 30px;font-size:clamp(16.5px,1.8vw,19.5px);color:rgba(255,255,255,.84);max-width:36em}
.nut-hang{display:flex;flex-wrap:wrap;gap:13px}
.nut{display:inline-flex;align-items:center;gap:9px;padding:14px 26px;border-radius:999px;
  font-weight:700;font-size:15.5px;text-decoration:none;border:0;cursor:pointer;
  transition:transform .15s,box-shadow .15s,background .15s}
.nut-chinh{background:#fff;color:var(--den);box-shadow:0 10px 30px rgba(0,0,0,.28)}
.nut-chinh:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(0,0,0,.36)}
.nut-phu{border:1.5px solid rgba(255,255,255,.4);color:#fff;background:transparent}
.nut-phu:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.hinh-hero{background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.16);
  border-radius:20px;padding:20px;backdrop-filter:blur(6px);box-shadow:0 30px 70px rgba(0,0,0,.4)}
.hinh-hero svg{width:100%;height:auto;display:block}

/* ===== Dải số liệu ===== */
.so-lieu{background:var(--than);color:#fff}
.so-lieu .bao{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.1);padding:0}
.o-so{background:var(--than);padding:30px 22px;text-align:center}
.o-so b{display:block;font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.1;
  background:linear-gradient(96deg,#fff,#c9c2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.o-so span{display:block;margin-top:7px;font-size:13.5px;color:rgba(255,255,255,.66);font-weight:500}

/* ===== Khối ===== */
.khoi{padding:82px 0}
.khoi-diu{background:var(--nen-diu)}
.khoi-den{background:var(--den);color:#fff}
.khoi-den .dan{color:rgba(255,255,255,.72)}
.nhan{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.khoi-den .nhan{background:linear-gradient(96deg,var(--vang),#ffa53d);-webkit-background-clip:text;background-clip:text}
.khoi h2{margin:0 0 16px;font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.4px;line-height:1.22}
.dan{font-size:17px;color:var(--chu-nhat);max-width:64ch;margin:0 0 40px}
.giua{text-align:center}
.giua .dan{margin-left:auto;margin-right:auto}

/* ===== Thẻ ===== */
.luoi{display:grid;gap:22px}
.luoi-2{grid-template-columns:repeat(2,1fr)}
.luoi-3{grid-template-columns:repeat(3,1fr)}
.luoi-4{grid-template-columns:repeat(4,1fr)}
.the{background:#fff;border:1px solid var(--vien);border-radius:var(--bo);padding:28px;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.the:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(38,38,46,.09);border-color:#d6d6ea}
.the h3{margin:0 0 9px;font-size:18px;font-weight:700}
.the p{margin:0;color:var(--chu-nhat);font-size:15.5px}
.bieu{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(116,98,249,.13),rgba(34,125,249,.13))}
.bieu svg{width:24px;height:24px;stroke:var(--tim);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* ===== Lộ trình 4 phần ===== */
.lo-trinh{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.phan{background:#fff;border:1px solid var(--vien);border-radius:15px;padding:26px 22px;position:relative;
  transition:transform .18s,box-shadow .18s}
.phan:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(38,38,46,.11)}
.phan-so{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:var(--grad);color:#fff;font-weight:800;font-size:16px;margin-bottom:14px}
.phan h3{margin:0 0 9px;font-size:17px;font-weight:700;line-height:1.34}
.phan p{margin:0 0 16px;font-size:14.5px;color:var(--chu-nhat)}
.phan-nop{border-top:1px dashed var(--vien);padding-top:13px;font-size:13.5px}
.phan-nop b{display:block;font-size:11.5px;text-transform:uppercase;letter-spacing:1px;
  color:var(--tim);font-weight:700;margin-bottom:3px}

/* ===== Chín bước ===== */
.buoc-luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:b}
.buoc{position:relative;background:#fff;border:1px solid var(--vien);border-radius:14px;padding:24px 22px 22px;
  transition:transform .18s,box-shadow .18s}
.buoc:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(38,38,46,.1)}
.buoc::before{counter-increment:b;content:counter(b,decimal-leading-zero);
  font-size:13px;font-weight:800;letter-spacing:.5px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.buoc h4{margin:8px 0 6px;font-size:16.5px;font-weight:700}
.buoc p{margin:0;font-size:14.5px;color:var(--chu-nhat)}

/* ===== Cách học 70/20/10 ===== */
.cach-hoc{display:grid;grid-template-columns:.85fr 1.15fr;gap:52px;align-items:center}
.vong{max-width:330px;margin:0 auto}
.ph-ds{display:grid;gap:16px;margin:0;padding:0;list-style:none}
.ph-ds li{display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:center;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);border-radius:13px;padding:18px 20px}
.ph-ds b{font-size:26px;font-weight:800;background:linear-gradient(96deg,#fff,#c9c2ff);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.ph-ds strong{display:block;font-size:16px;margin-bottom:2px}
.ph-ds span{color:rgba(255,255,255,.66);font-size:14.5px}

/* ===== Dự án mẫu ===== */
.mau{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.mau-hinh{background:#fff;border:1px solid var(--vien);border-radius:var(--bo);padding:22px;
  box-shadow:0 20px 50px rgba(38,38,46,.08)}
.mau-hinh svg{width:100%;height:auto;display:block}
.nhom-mh{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:34px}
.nhom{background:#fff;border:1px solid var(--vien);border-radius:13px;padding:20px 18px}
.nhom h4{margin:0 0 4px;font-size:15px;font-weight:700}
.nhom em{font-style:normal;font-size:12.5px;font-weight:700;color:var(--tim)}
.nhom ul{margin:11px 0 0;padding:0;list-style:none;display:grid;gap:5px}
.nhom li{font-size:13.5px;color:var(--chu-nhat);padding-left:13px;position:relative}
.nhom li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:#cdcde0}

/* ===== Danh sách tick ===== */
.ds{list-style:none;padding:0;margin:0;display:grid;gap:13px}
.ds li{display:flex;gap:13px;align-items:flex-start;font-size:16px}
.ds svg{flex:0 0 22px;width:22px;height:22px;margin-top:2px}
.co svg circle{fill:rgba(52,199,123,.14)}
.co svg path{stroke:#22a35f;stroke-width:2.1;fill:none;stroke-linecap:round;stroke-linejoin:round}
.khong svg circle{fill:rgba(148,148,166,.14)}
.khong svg path{stroke:#8a8a9c;stroke-width:2.1;fill:none;stroke-linecap:round}

/* ===== Phạm vi ===== */
.pham{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pham-o{border-radius:var(--bo);padding:30px;border:1px solid var(--vien);background:#fff}
.pham-o.co-day{border-color:rgba(34,163,95,.3);background:linear-gradient(180deg,rgba(52,199,123,.05),#fff)}
.pham-o h3{margin:0 0 18px;font-size:17.5px;font-weight:700;display:flex;align-items:center;gap:10px}

/* ===== Biểu mẫu đăng ký ===== */
.dk{background:var(--den);color:#fff;border-radius:24px;overflow:hidden;
  display:grid;grid-template-columns:.92fr 1.08fr;box-shadow:0 34px 80px rgba(31,32,34,.28)}
.dk-trai{padding:52px 44px;position:relative;overflow:hidden}
.dk-trai::before{content:"";position:absolute;inset:0;
  background:radial-gradient(620px 340px at 6% 0%,rgba(116,98,249,.55),transparent 62%),
             radial-gradient(520px 320px at 96% 100%,rgba(223,62,248,.36),transparent 62%)}
.dk-trai>*{position:relative}
.dk-trai h2{margin:0 0 13px;font-size:clamp(24px,2.9vw,33px);font-weight:800;line-height:1.2}
.dk-trai>p{margin:0 0 30px;color:rgba(255,255,255,.8);font-size:16.5px}
.dk-loi-ich{list-style:none;margin:0 0 30px;padding:0;display:grid;gap:12px}
.dk-loi-ich li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.9)}
.dk-loi-ich svg{flex:0 0 20px;width:20px;height:20px;margin-top:2px;stroke:var(--vang);fill:none;
  stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.dk-cn{border-top:1px solid rgba(255,255,255,.16);padding-top:22px}
.dk-cn b{display:block;font-size:11.5px;letter-spacing:1.2px;text-transform:uppercase;
  color:rgba(255,255,255,.5);font-weight:700;margin-bottom:9px}
.dk-cn p{margin:0 0 5px;font-size:14px;color:rgba(255,255,255,.78)}

.dk-phai{background:#fff;color:var(--chu);padding:44px 40px}
.dk-phai h3{margin:0 0 6px;font-size:20px;font-weight:800}
.dk-phai>p{margin:0 0 24px;color:var(--chu-nhat);font-size:14.5px}
.o-hang{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.o{display:grid;gap:6px;margin-bottom:16px}
.o label{font-size:13px;font-weight:700;color:var(--chu-nhat)}
.o label span{color:var(--do)}
.o input,.o select,.o textarea{padding:12px 14px;border:1px solid var(--vien);border-radius:10px;
  font:inherit;font-size:15px;color:var(--chu);background:#fff;width:100%}
.o textarea{resize:vertical;min-height:78px}
.o input:focus,.o select:focus,.o textarea:focus{outline:0;border-color:var(--tim);
  box-shadow:0 0 0 3px rgba(116,98,249,.13)}
.o input.co-loi,.o select.co-loi{border-color:var(--do);box-shadow:0 0 0 3px rgba(217,72,72,.11)}
.loi-o{color:var(--do);font-size:12.5px;min-height:1px}
.mat{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.o-captcha{background:var(--nen-diu);border:1px solid var(--vien);border-radius:12px;padding:16px 18px;margin-bottom:18px}
.o-captcha .cau-hoi{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.o-captcha label{font-size:13px;font-weight:700;color:var(--chu-nhat);margin-bottom:7px;display:block}
.o-captcha .de{font-weight:700;font-size:16px;color:var(--chu);
  background:#fff;border:1px solid var(--vien);border-radius:8px;padding:9px 15px;min-width:190px}
.o-captcha input{max-width:110px;padding:10px 13px;border:1px solid var(--vien);border-radius:8px;
  font:inherit;font-size:15px;text-align:center}
.dk-gui{width:100%;justify-content:center;background:var(--grad);color:#fff;
  box-shadow:0 10px 28px rgba(116,98,249,.34);padding:15px}
.dk-gui:hover{filter:brightness(1.07);transform:translateY(-2px)}
.dk-gui:disabled{opacity:.6;cursor:not-allowed;transform:none}
.rieng-tu{margin:14px 0 0;font-size:12.5px;color:var(--chu-nhat);text-align:center}
.dk-bao{margin-bottom:20px;padding:15px 18px;border-radius:11px;font-weight:500;font-size:15px}
.dk-ok{background:rgba(34,163,95,.1);border:1px solid rgba(34,163,95,.32);color:#186c40}
.dk-loi{background:rgba(217,72,72,.09);border:1px solid rgba(217,72,72,.32);color:#a82f2f}

/* ===== Chân trang ===== */
.chan{background:var(--than);color:rgba(255,255,255,.62);padding:34px 0;font-size:14.5px}
.chan .bao{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
.chan a{color:rgba(255,255,255,.86);text-decoration:none}
.chan a:hover{color:#fff;text-decoration:underline}

/* ===== Màn hình nhỏ ===== */
@media (max-width:1080px){
  .dau-menu{display:none}
  .cs-menu a{padding:9px 9px;font-size:12.5px}
  .nhom-mh{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:980px){
  .hero .bao{grid-template-columns:1fr;gap:38px}
  .mau,.cach-hoc{grid-template-columns:1fr;gap:34px}
  .luoi-3,.luoi-4,.buoc-luoi{grid-template-columns:repeat(2,1fr)}
  .lo-trinh{grid-template-columns:repeat(2,1fr)}
  .so-lieu .bao{grid-template-columns:repeat(2,1fr)}
  .dk{grid-template-columns:1fr}
  .dk-trai{padding:40px 30px}
  .dk-phai{padding:36px 30px}
}
@media (max-width:640px){
  .cs-top{display:none}
  .cs-chinh .bao{height:58px;gap:12px}
  .cs-logo img{height:36px}
  .cs-menu{display:none}
  .cs-nut{margin-left:auto;padding:9px 14px;font-size:12px}
  .hero{padding:60px 0 68px}
  .khoi{padding:60px 0}
  .luoi-2,.luoi-3,.luoi-4,.buoc-luoi,.pham,.lo-trinh,.nhom-mh{grid-template-columns:1fr}
  .o-hang{grid-template-columns:1fr}
  .dau-nut{padding:10px 15px;font-size:13.5px}
  .logo img{height:32px}
}

/* ===== Sơ đồ kiến trúc ba tầng ===== */
.so-do-khung{background:#fff;border:1px solid var(--vien);border-radius:var(--bo);
  padding:30px;box-shadow:0 18px 44px rgba(38,38,46,.07)}
.so-do-khung svg{width:100%;height:auto;display:block}
.khoi-den .so-do-khung{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14);box-shadow:none}

/* ===== Chín bước dạng dòng chảy ===== */
.gd-hang{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.gd{border-radius:13px;padding:16px 18px;border:1px solid var(--vien);background:#fff}
.gd b{display:block;font-size:11.5px;letter-spacing:1.2px;text-transform:uppercase;font-weight:800;margin-bottom:4px}
.gd span{font-size:13.5px;color:var(--chu-nhat)}
.gd.g1{border-color:rgba(116,98,249,.34);background:linear-gradient(180deg,rgba(116,98,249,.07),#fff)}
.gd.g1 b{color:#5b4bd6}
.gd.g2{border-color:rgba(34,125,249,.34);background:linear-gradient(180deg,rgba(34,125,249,.07),#fff)}
.gd.g2 b{color:#1a68d4}
.gd.g3{border-color:rgba(223,62,248,.3);background:linear-gradient(180deg,rgba(223,62,248,.06),#fff)}
.gd.g3 b{color:#b52dc9}
.gd.g4{border-color:rgba(34,163,95,.34);background:linear-gradient(180deg,rgba(34,163,95,.07),#fff)}
.gd.g4 b{color:#1a8b50}

.buoc-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:bf}
.bf{position:relative;background:#fff;border:1px solid var(--vien);border-radius:14px;padding:22px;
  display:grid;grid-template-columns:44px 1fr;gap:15px;align-items:start;transition:transform .18s,box-shadow .18s}
.bf:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(38,38,46,.1)}
.bf-so{counter-increment:bf;display:grid;place-items:center;width:44px;height:44px;border-radius:12px;
  color:#fff;font-weight:800;font-size:17px}
.bf-so::before{content:counter(bf)}
.bf.g1 .bf-so{background:linear-gradient(135deg,#7462f9,#8b7bff)}
.bf.g2 .bf-so{background:linear-gradient(135deg,#227df9,#4a97ff)}
.bf.g3 .bf-so{background:linear-gradient(135deg,#df3ef8,#ea6cff)}
.bf.g4 .bf-so{background:linear-gradient(135deg,#22a35f,#35c47b)}
.bf h4{margin:0 0 5px;font-size:16px;font-weight:700}
.bf p{margin:0 0 10px;font-size:14px;color:var(--chu-nhat)}
.bf-ra{font-size:12.5px;color:var(--chu-nhat);border-top:1px dashed var(--vien);padding-top:9px}
.bf-ra b{color:var(--chu);font-weight:700}

/* ===== Wireframe màn hình ===== */
.wf-luoi{display:grid;grid-template-columns:1.25fr .75fr;gap:34px;align-items:start}
.wf-khung{background:#fff;border:1px solid var(--vien);border-radius:var(--bo);padding:18px;
  box-shadow:0 18px 44px rgba(38,38,46,.08)}
.wf-khung svg{width:100%;height:auto;display:block;border-radius:9px}
.wf-nhan{display:flex;align-items:center;gap:9px;margin-bottom:13px;font-size:13px;color:var(--chu-nhat)}
.wf-nhan span{background:var(--nen-diu);border:1px solid var(--vien);border-radius:999px;
  padding:3px 11px;font-weight:700;font-size:11.5px;letter-spacing:.6px;text-transform:uppercase;color:var(--tim)}
.chu-thich{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.chu-thich li{display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:start;font-size:14.5px}
.chu-thich em{font-style:normal;display:grid;place-items:center;width:26px;height:26px;border-radius:50%;
  background:var(--grad);color:#fff;font-weight:800;font-size:12.5px}
.bang-nut{width:100%;border-collapse:collapse;margin-top:22px;font-size:14px}
.bang-nut th{text-align:left;padding:10px 13px;background:var(--nen-diu);font-size:11.5px;
  text-transform:uppercase;letter-spacing:.8px;color:var(--chu-nhat);font-weight:800;border-bottom:1px solid var(--vien)}
.bang-nut td{padding:11px 13px;border-bottom:1px solid #f0f0f6;vertical-align:top}
.bang-nut tr:last-child td{border-bottom:0}
.bang-nut .mui{color:var(--tim);font-weight:700}

/* ===== Luồng đơn hàng qua bốn màn hình ===== */
.luong{display:grid;grid-template-columns:repeat(4,1fr);gap:0;align-items:stretch;margin-top:34px}
.lo{position:relative;background:#fff;border:1px solid var(--vien);padding:22px 20px;
  border-right:0}
.lo:first-child{border-radius:14px 0 0 14px}
.lo:last-child{border-right:1px solid var(--vien);border-radius:0 14px 14px 0}
.lo::after{content:"";position:absolute;right:-9px;top:50%;transform:translateY(-50%) rotate(45deg);
  width:16px;height:16px;background:#fff;border-top:1px solid var(--vien);border-right:1px solid var(--vien);z-index:2}
.lo:last-child::after{display:none}
.lo b{display:block;font-size:11.5px;letter-spacing:1.1px;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800;margin-bottom:6px}
.lo h4{margin:0 0 7px;font-size:16px;font-weight:700}
.lo p{margin:0 0 11px;font-size:13.5px;color:var(--chu-nhat)}
.lo-db{font-size:12.5px;color:var(--chu-nhat);border-top:1px dashed var(--vien);padding-top:9px}
.lo-db code{background:var(--nen-diu);border:1px solid var(--vien);border-radius:5px;
  padding:1px 7px;font-size:12px;color:var(--chu);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* ===== Hạ tầng cần có ===== */
.ht-luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.ht{background:#fff;border:1px solid var(--vien);border-radius:13px;padding:22px;
  transition:transform .18s,box-shadow .18s}
.ht:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(38,38,46,.09)}
.ht-dau{display:flex;align-items:center;gap:11px;margin-bottom:9px}
.ht-bieu{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;flex:0 0 38px;
  background:linear-gradient(135deg,rgba(116,98,249,.14),rgba(34,125,249,.14))}
.ht-bieu svg{width:20px;height:20px;stroke:var(--tim);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.ht h4{margin:0;font-size:15.5px;font-weight:700}
.ht p{margin:0;font-size:14px;color:var(--chu-nhat)}

@media (max-width:980px){
  .wf-luoi{grid-template-columns:1fr;gap:26px}
  .gd-hang,.ht-luoi,.buoc-flow{grid-template-columns:repeat(2,1fr)}
  .luong{grid-template-columns:1fr}
  .lo{border-right:1px solid var(--vien);border-bottom:0}
  .lo:first-child{border-radius:14px 14px 0 0}
  .lo:last-child{border-radius:0 0 14px 14px;border-bottom:1px solid var(--vien)}
  .lo::after{right:50%;top:auto;bottom:-9px;transform:translateX(50%) rotate(135deg)}
}
@media (max-width:640px){
  .gd-hang,.ht-luoi,.buoc-flow{grid-template-columns:1fr}
  .so-do-khung{padding:18px}
  .bang-nut{font-size:13px}
}

/* ===== Thư viện bản vẽ nhiều màn hình ===== */
.tv-luoi{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tv{background:#fff;border:1px solid var(--vien);border-radius:14px;overflow:hidden;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.tv:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(38,38,46,.12);border-color:#d0d0e6}
.tv svg{width:100%;height:auto;display:block;background:#fafafd;border-bottom:1px solid var(--vien)}
.tv-chan{padding:14px 16px}
.tv-ma{display:inline-block;font-size:10.5px;font-weight:800;letter-spacing:.7px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:2px}
.tv-chan h4{margin:0 0 2px;font-size:14.5px;font-weight:700}
.tv-chan p{margin:0;font-size:12.5px;color:var(--chu-nhat)}

/* ===== Sơ đồ vai trò ===== */
.vt-luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}
.vt{background:#fff;border:1px solid var(--vien);border-radius:14px;padding:24px}
.vt-dau{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.vt-anh{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:0 0 44px}
.vt-anh svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.vt.v1 .vt-anh{background:linear-gradient(135deg,#7462f9,#8b7bff)}
.vt.v2 .vt-anh{background:linear-gradient(135deg,#227df9,#4a97ff)}
.vt.v3 .vt-anh{background:linear-gradient(135deg,#df3ef8,#ea6cff)}
.vt h4{margin:0;font-size:16.5px;font-weight:700}
.vt-dau span{font-size:12.5px;color:var(--chu-nhat)}
.vt ul{margin:0;padding:0;list-style:none;display:grid;gap:7px}
.vt li{font-size:14px;color:var(--chu-nhat);padding-left:16px;position:relative}
.vt li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:#c9c9dd}

@media (max-width:1080px){ .tv-luoi{grid-template-columns:repeat(3,1fr)} }
@media (max-width:980px){ .tv-luoi{grid-template-columns:repeat(2,1fr)} .vt-luoi{grid-template-columns:1fr} }
@media (max-width:560px){ .tv-luoi{grid-template-columns:1fr} }

/* ===== Popup xem bản vẽ phóng to ===== */
.tv{cursor:zoom-in;position:relative}
.tv-zoom{position:absolute;top:10px;right:10px;width:30px;height:30px;border-radius:8px;
  background:rgba(31,32,34,.72);display:grid;place-items:center;opacity:0;transition:opacity .18s;
  backdrop-filter:blur(4px);pointer-events:none}
.tv-zoom svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:2.1;stroke-linecap:round;
  background:none;border:0}
.tv:hover .tv-zoom,.tv:focus-visible .tv-zoom{opacity:1}
.tv:focus-visible{outline:2px solid var(--tim);outline-offset:2px}

.pu{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:28px}
.pu.mo{display:flex}
.pu-nen{position:absolute;inset:0;background:rgba(20,20,28,.78);backdrop-filter:blur(5px)}
.pu-hop{position:relative;background:#fff;border-radius:18px;width:100%;max-width:1080px;
  max-height:92vh;overflow:auto;box-shadow:0 40px 100px rgba(0,0,0,.5);
  animation:puvao .2s ease-out}
@keyframes puvao{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.pu-dau{display:flex;align-items:flex-start;gap:16px;padding:24px 28px 18px;border-bottom:1px solid var(--vien);
  position:sticky;top:0;background:#fff;border-radius:18px 18px 0 0;z-index:2}
.pu-dau h3{margin:0 0 3px;font-size:20px;font-weight:800}
.pu-dau p{margin:0;color:var(--chu-nhat);font-size:14.5px}
.pu-ma{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.8px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:3px}
.pu-dong{margin-left:auto;flex:0 0 38px;width:38px;height:38px;border-radius:10px;border:1px solid var(--vien);
  background:#fff;cursor:pointer;display:grid;place-items:center;transition:background .15s,border-color .15s}
.pu-dong:hover{background:var(--nen-diu);border-color:#c9c9dd}
.pu-dong svg{width:17px;height:17px;stroke:var(--chu);fill:none;stroke-width:2.2;stroke-linecap:round}
.pu-than{display:grid;grid-template-columns:1.4fr .6fr;gap:26px;padding:24px 28px 30px}
.pu-ve{background:#fafafd;border:1px solid var(--vien);border-radius:13px;padding:16px}
.pu-ve svg{width:100%;height:auto;display:block;border-radius:8px}
.pu-ghi h4{margin:0 0 12px;font-size:12px;letter-spacing:1px;text-transform:uppercase;
  color:var(--chu-nhat);font-weight:800}
.pu-ghi ul{margin:0 0 22px;padding:0;list-style:none;display:grid;gap:10px}
.pu-ghi li{display:grid;grid-template-columns:24px 1fr;gap:11px;font-size:14.5px;align-items:start}
.pu-ghi em{font-style:normal;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;
  background:var(--grad);color:#fff;font-weight:800;font-size:12px}
.pu-vai{display:flex;flex-wrap:wrap;gap:7px}
.pu-vai span{background:var(--nen-diu);border:1px solid var(--vien);border-radius:999px;
  padding:4px 12px;font-size:12.5px;font-weight:600;color:var(--chu-nhat)}
body.khoa-cuon{overflow:hidden}

@media (max-width:900px){
  .pu{padding:14px}
  .pu-than{grid-template-columns:1fr;gap:20px;padding:20px}
  .pu-dau{padding:18px 20px 14px}
}