/* === Mẫu 1 Vững Chãi V4 — page-only CSS === */
:root{
    --brick:#D4391F;
    --brick-dark:#A82B14;
    --navy:#243558;          /* ← sáng & ấm hơn so với #1B2A4A cũ */
    --navy-2:#2e4470;
    --steel:#5C6B7A;
    --stone:#F3F1ED;
    --paper:#FFFFFF;
    --line:#E2DED7;
    --ink:#22262B;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{font-family:'Open Sans',sans-serif;color:var(--ink);background:var(--paper);line-height:1.6;}
  h1,h2,h3,h4{font-family:'Oswald',sans-serif;text-transform:uppercase;letter-spacing:.02em;color:var(--navy);line-height:1.3;}
  a{text-decoration:none;color:inherit;}
  img{display:block;max-width:100%;}
  .wrap{max-width:1200px;margin:0 auto;padding:0 28px;}

  /* ===== TOPBAR ===== */
  .topbar{background:var(--navy);color:#c8d4e8;font-size:13.5px;}
  .topbar .wrap{display:flex;justify-content:space-between;align-items:center;padding:9px 28px;flex-wrap:wrap;gap:8px;}
  .topbar .info{display:flex;gap:28px;flex-wrap:wrap;}
  .topbar .info span{display:inline-flex;align-items:center;gap:7px;}
  .topbar .worktime{color:#a8b8d0;}
  .topbar .hotline{color:#fff;font-weight:700;font-size:14px;letter-spacing:.02em;}
  .topbar .hotline b{color:#FF8A5C;font-size:15px;}

  /* ===== HEADER ===== */
  header{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;}
  .header-inner{display:flex;align-items:center;justify-content:space-between;padding:13px 28px;}
  .logo{display:flex;align-items:center;gap:12px;}
  .logo-img{width:auto;height:58px;max-width:220px;object-fit:contain;}
  nav ul{display:flex;gap:28px;list-style:none;}
  nav a{font-family:'Oswald';font-size:14px;font-weight:500;text-transform:uppercase;letter-spacing:.04em;color:var(--navy);padding:8px 0;border-bottom:2px solid transparent;transition:.2s;}
  nav a:hover,nav a.active{color:var(--brick);border-bottom-color:var(--brick);}
  .cta-btn{background:var(--brick);color:#fff;font-family:'Oswald';font-weight:600;font-size:13.5px;letter-spacing:.05em;text-transform:uppercase;padding:12px 26px;border-radius:2px;transition:.2s;white-space:nowrap;}
  .cta-btn:hover{background:var(--brick-dark);}

  /* ===== HERO ===== */
  .hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;min-height:540px;display:flex;align-items:center;}
  .hero::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(20,40,90,.96) 0%,rgba(36,53,88,.82) 45%,rgba(212,57,31,.15) 100%);z-index:1;}
  .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6;}
  .hero .wrap{position:relative;z-index:2;padding:76px 28px;}
  .hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:'Oswald';font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brick);background:rgba(212,57,31,.12);border:1px solid rgba(212,57,31,.38);padding:7px 14px;margin-bottom:22px;}
  .hero h1{font-size:50px;color:#fff;margin-bottom:18px;font-weight:700;max-width:640px;}
  .hero h1 em{font-style:normal;color:var(--brick);}
  .hero p{font-size:17px;color:#c7cedd;max-width:520px;margin-bottom:32px;}
  .hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
  .btn-outline{border:1.5px solid rgba(255,255,255,.5);color:#fff;font-family:'Oswald';font-weight:500;font-size:14px;text-transform:uppercase;letter-spacing:.04em;padding:13px 26px;transition:.2s;}
  .btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);}
  .btn-solid{background:var(--brick);color:#fff;font-family:'Oswald';font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.04em;padding:14px 30px;transition:.2s;}
  .btn-solid:hover{background:var(--brick-dark);}

  /* ===== STATS STRIP (tách khỏi hero, bên dưới) ===== */
  .stats-strip{background:var(--navy-2);padding:0;}
  .stats-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat-item{
    padding:30px 24px;text-align:center;
    border-right:1px solid rgba(255,255,255,.12);
    position:relative;
  }
  .stat-item:last-child{border-right:none;}
  .stat-circle{
    width:72px;height:72px;border-radius:50%;
    border:2.5px solid var(--brick);
    display:flex;align-items:center;justify-content:center;
    margin:0 auto 14px;
    background:rgba(212,57,31,.08);
  }
  .stat-num{font-family:'Oswald';font-size:22px;font-weight:700;color:#fff;line-height:1;}
  .stat-label{font-size:12px;color:#a8bcd4;text-transform:uppercase;letter-spacing:.05em;line-height:1.35;}

  /* ===== TRUST STRIP ===== */
  .trust-strip{background:var(--brick);color:#fff;}
  .trust-strip .wrap{display:flex;justify-content:space-between;padding:18px 28px;flex-wrap:wrap;gap:18px;}
  .trust-item{display:flex;align-items:center;gap:11px;font-family:'Oswald';font-size:13.5px;text-transform:uppercase;letter-spacing:.03em;}
  .trust-item .ico{width:32px;height:32px;border:1.5px solid rgba(255,255,255,.55);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:15px;}

  /* ===== SECTION GENERIC ===== */
  
  .section-tag{color:var(--brick);font-family:'Oswald';font-size:13px;letter-spacing:.15em;text-transform:uppercase;font-weight:600;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
  .section-tag::before{content:"";width:28px;height:2px;background:var(--brick);}
  .section-title{font-size:32px;margin-bottom:16px;}
  .section-desc{color:var(--steel);font-size:16px;max-width:620px;margin-bottom:48px;}

  /* ===== ABOUT ===== */
  .about{background:var(--paper);}
  .about-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:60px;align-items:center;}
  .about-img-group{position:relative;}
  .img-main{width:100%;height:420px;object-fit:cover;border-radius:2px;}
  .img-badge{position:absolute;bottom:-26px;left:-26px;background:var(--navy);color:#fff;padding:22px 26px;border-left:5px solid var(--brick);}
  .img-badge .num{font-family:'Oswald';font-size:30px;font-weight:700;color:var(--brick);}
  .img-badge .lbl{font-size:12.5px;color:#c7cedd;text-transform:uppercase;letter-spacing:.04em;margin-top:2px;}
  .about-body p{color:var(--ink);font-size:15.5px;margin-bottom:16px;}
  .about-list{margin-top:26px;display:grid;gap:14px;}
  .about-list li{display:flex;gap:14px;align-items:flex-start;list-style:none;font-size:15px;color:var(--ink);}
  .about-list .check{width:22px;height:22px;background:var(--brick);color:#fff;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-top:1px;}

  /* ===== TIMELINE (hành trình phát triển) ===== */
  .timeline-section{background:var(--stone);padding:72px 0;}
  .timeline{display:flex;gap:0;position:relative;overflow-x:auto;}
  .timeline::before{content:"";position:absolute;top:28px;left:0;right:0;height:2px;background:var(--line);z-index:0;}
  .tl-item{flex:1;min-width:180px;padding:0 20px;position:relative;z-index:1;text-align:center;}
  .tl-dot{
    width:56px;height:56px;border-radius:50%;background:#fff;
    border:3px solid var(--brick);display:flex;align-items:center;justify-content:center;
    margin:0 auto 14px;position:relative;z-index:1;
    font-family:'Oswald';font-size:13px;font-weight:700;color:var(--brick);
  }
  .tl-item.active .tl-dot{background:var(--brick);color:#fff;}
  .tl-year{font-family:'Oswald';font-size:17px;font-weight:700;color:var(--navy);margin-bottom:6px;}
  .tl-desc{font-size:13.5px;color:var(--steel);line-height:1.5;}

  /* ===== PRODUCTS — layout 2 cột xen kẽ ===== */
  .products{background:var(--paper);padding:84px 0 0;}
  .products .container {
  max-width: 1200px; /* Chiều ngang tối đa của vùng nội dung */
  margin: 0 auto;    /* Căn giữa container này ra giữa màn hình */
  width: 100%;
}
  .prod-section-header{margin-bottom:56px;}

  .prod-block{
    display:grid;
    grid-template-columns:1fr 1fr;
    min-height:480px;
    border-top:1px solid var(--line);
  }
  .prod-block:last-child{border-bottom:1px solid var(--line);}

  /* cột nội dung */
  .pb-content{
    padding:60px 64px;
    display:flex;flex-direction:column;justify-content:center;
    background:var(--paper);
  }
  .pb-content.bg-stone{background:var(--stone);}

  .pb-cat{
    font-size:12px;color:var(--brick);text-transform:uppercase;
    letter-spacing:.12em;font-weight:700;margin-bottom:14px;
    display:flex;align-items:center;gap:10px;
  }
  .pb-cat::before{content:"";width:24px;height:2px;background:var(--brick);}
  .pb-content h3{
    font-family:'Oswald';font-size:30px;font-weight:700;color:var(--navy);
    text-transform:uppercase;letter-spacing:.02em;line-height:1.18;margin-bottom:20px;
  }
  .pb-content p{
    font-size:15.5px;color:var(--steel);line-height:1.7;margin-bottom:14px;
  }
  .pb-content p:last-of-type{margin-bottom:32px;}
  .pb-cta{
    display:inline-flex;align-items:center;gap:10px;
    background:var(--brick);color:#fff;font-family:'Oswald';font-weight:600;
    font-size:14px;text-transform:uppercase;letter-spacing:.05em;
    padding:14px 28px;border-radius:2px;transition:.2s;align-self:flex-start;
  }
  .pb-cta:hover{background:var(--brick-dark);}
  .pb-cta svg{transition:.2s;}
  .pb-cta:hover svg{transform:translateX(4px);}

  /* cột ảnh */
  .pb-visual{
    position:relative;overflow:hidden;background:var(--navy);
  }
  .pb-visual.bg-stone{background:var(--stone);}
  .pb-visual img{
    width:100%;height:100%;object-fit:cover;
    transition:.5s ease;display:block;
  }
  .prod-block:hover .pb-visual img{transform:scale(1.04);}

  /* khung ảnh nhỏ nổi — như hình tham khảo */
  .pb-img-frame{
    position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
    padding:32px;
  }
  .pb-img-frame-inner{
    width:100%;height:100%;
    border:2px dashed rgba(255,255,255,.35);
    position:relative;
  }
  /* overlay gradient dưới lên để label rõ */
  .pb-visual::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(to top, rgba(20,40,90,.55) 0%, transparent 50%);
    pointer-events:none;
  }

  /* tag tên sản phẩm nổi dưới ảnh */
  .pb-label{
    position:absolute;bottom:0;left:0;right:0;z-index:2;
    padding:20px 28px;
    color:#fff;
  }
  .pb-label-cat{font-size:11px;color:#FF8A5C;text-transform:uppercase;letter-spacing:.1em;font-weight:700;margin-bottom:4px;}
  .pb-label-name{font-family:'Oswald';font-size:20px;font-weight:700;color:#fff;}

  /* ===== WHY US ===== */
  .why{background:var(--navy);color:#fff;}
  .why .wrap{padding-bottom:0;}
  .why .container {
  max-width: 1200px; /* Chiều ngang tối đa của vùng nội dung */
  margin: 0 auto;    /* Căn giữa container này ra giữa màn hình */
  width: 100%;
}
  .why .section-tag{color:#FF8A5C;}
  .why .section-tag::before{background:#FF8A5C;}
  .why .section-desc{color:#c7cedd;}
  .why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.1);margin-top:48px;}
  .why-card{background:var(--navy);padding:40px 34px;}
  .why-num{font-family:'Oswald';font-size:44px;font-weight:700;color:rgba(255,255,255,.1);margin-bottom:6px;}
  .why-card h3{color:#fff;font-size:19px;margin-bottom:12px;}
  .why-card p{color:#aab4c8;font-size:14.5px;}
  .why-card .accent{width:32px;height:3px;background:var(--brick);margin-bottom:18px;}

  /* ===== PROJECTS ===== */
  .projects{background:var(--paper);}
  .proj-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;grid-template-rows:240px 240px;gap:16px;margin-bottom:60px;}
  .proj-item{position:relative;overflow:hidden;}
  .proj-item:first-child{grid-row:span 2;}
  .proj-item img{width:100%;height:100%;object-fit:cover;transition:.4s;}
  .proj-item:hover img{transform:scale(1.06);}
  .proj-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(20,40,90,.92) 0%,transparent 55%);display:flex;align-items:flex-end;padding:20px;}
  .proj-overlay h4{color:#fff;font-size:15px;}
  .proj-overlay span{display:block;color:var(--brick);font-size:11px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px;font-weight:600;}

  /* ===== LOGO CLIENTS GRID ===== */
  .clients-title{font-family:'Oswald';font-size:16px;color:var(--steel);text-transform:uppercase;letter-spacing:.08em;margin-bottom:24px;padding-top:12px;border-top:1px solid var(--line);}
  .clients-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;}
  .client-logo{
    background:var(--stone);border:1px solid var(--line);
    aspect-ratio:3/2;display:flex;align-items:center;justify-content:center;
    padding:16px;transition:.2s;
  }
  .client-logo:hover{border-color:var(--brick);background:#fff;}
  .client-logo img{max-width:100%;max-height:54px;object-fit:contain;filter:grayscale(100%);opacity:.65;transition:.2s;}
  .client-logo:hover img{filter:none;opacity:1;}
  /* placeholder text logo */
  .client-logo span{font-family:'Oswald';font-size:13px;font-weight:600;color:var(--steel);text-align:center;text-transform:uppercase;letter-spacing:.04em;}

  /* ===== PRODUCTION LINE ===== */
  .production{background:var(--stone);padding:80px 0;}
  .prod-line-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;}
  .prod-line-grid::before{content:"";position:absolute;top:36px;left:10%;right:10%;height:2px;background:var(--line);z-index:0;}
  .pl-step{text-align:center;padding:0 12px;position:relative;z-index:1;}
  .pl-ico{
    width:72px;height:72px;border-radius:50%;background:#fff;border:3px solid var(--line);
    display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
    font-size:26px;transition:.2s;
  }
  .pl-step:hover .pl-ico{border-color:var(--brick);}
  .pl-num{
    position:absolute;top:-4px;right:calc(50% - 42px);
    width:22px;height:22px;background:var(--brick);color:#fff;border-radius:50%;
    font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;font-family:'Oswald';
  }
  .pl-name{font-family:'Oswald';font-size:15px;color:var(--navy);margin-bottom:6px;}
  .pl-desc{font-size:13px;color:var(--steel);line-height:1.45;}

  /* ===== CTA BANNER ===== */
  .cta-banner{background:var(--brick);color:#fff;padding:60px 0;}
  .cta-banner .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px;}
  .cta-banner h2{color:#fff;font-size:28px;margin-bottom:8px;}
  .cta-banner p{color:rgba(255,255,255,.85);font-size:15.5px;}
  .btn-white{border:1.5px solid rgba(255,255,255,.7);color:#fff;font-family:'Oswald';font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.04em;padding:14px 30px;transition:.2s;}
  .btn-white:hover{background:#fff;color:var(--brick);}

  /* ===== FOOTER ===== */
  footer{background:#0e1829;color:#9aa6bc;padding:64px 0 0;}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08);}
  .foot-logo{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
  .foot-logo img{width:40px;height:40px;object-fit:contain;}
  .foot-logo-text{font-family:'Oswald';font-size:19px;font-weight:700;color:#fff;}
  .foot-logo-text span{color:var(--brick);}
  footer p{font-size:14px;line-height:1.7;}
  footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:18px;text-transform:uppercase;}
  footer ul{list-style:none;display:grid;gap:11px;}
  footer ul a{font-size:14px;transition:.2s;color:#9aa6bc;}
  footer ul a:hover{color:var(--brick);}
  .foot-contact li{display:flex;gap:10px;font-size:14px;margin-bottom:12px;align-items:flex-start;color:#9aa6bc;}
  .foot-bottom{display:flex;justify-content:space-between;padding:22px 0;font-size:13px;flex-wrap:wrap;gap:10px;}
  .foot-bottom a{color:var(--brick);}

  @media(max-width:1024px){
    .stats-strip .wrap{grid-template-columns:repeat(2,1fr);}
    .stat-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);}
    .hero h1{font-size:36px;}
    .prod-block{grid-template-columns:1fr;}
    /* trên mobile, cột ảnh luôn lên trên nội dung */
    .pb-visual{min-height:280px;order:-1 !important;}
    .pb-content{padding:40px 28px;}
    .why-grid{grid-template-columns:1fr;}
    .about-grid{grid-template-columns:1fr;}
    .proj-grid{grid-template-columns:1fr 1fr;grid-template-rows:200px 200px 200px;}
    .proj-item:first-child{grid-row:auto;grid-column:span 2;}
    .clients-grid{grid-template-columns:repeat(3,1fr);}
    .prod-line-grid{grid-template-columns:1fr 1fr;gap:24px;}
    .prod-line-grid::before{display:none;}
    .foot-grid{grid-template-columns:1fr 1fr;}
    nav{display:none;}
    .timeline{flex-wrap:wrap;}
    .tl-item{min-width:140px;}
  }