:root {
      --bg: #f6f8fc;
      --surface: rgba(255, 255, 255, 0.86);
      --surface-solid: #ffffff;
      --text: #162033;
      --muted: #63708a;
      --primary: #0b1354;
      --primary-2: #1a4dff;
      --accent: #7c3aed;
      --success: #16a34a;
      --warning: #f59e0b;
      --danger: #e11d48;
      --border: rgba(15, 23, 42, 0.08);
      --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
      --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --container: 1180px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: Inter, "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(26, 77, 255, 0.10), transparent 28%),
        radial-gradient(circle at top right, rgba(124, 58, 237, 0.10), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f5f7fc 100%);
      line-height: 1.65;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      display: block;
    }

    .container {
      width: min(100% - 32px, var(--container));
      margin-inline: auto;
    }

    .section {
      padding: 84px 0;
    }

    .section-tight {
      padding: 64px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 14px;
      border-radius: 999px;
      background: rgba(26, 77, 255, 0.10);
      color: var(--primary-2);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.02em;
      margin-bottom: 16px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary-2);
      box-shadow: 0 0 0 6px rgba(26, 77, 255, 0.12);
    }

    .section-title {
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.1;
      letter-spacing: -0.03em;
      color: var(--primary);
      margin-bottom: 14px;
    }

    .section-subtitle {
      color: var(--muted);
      font-size: 16px;
      max-width: 720px;
      margin: 0 auto;
    }

    .section-head {
      text-align: center;
      margin-bottom: 34px;
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(16px);
      background: rgba(255, 255, 255, 0.72);
      border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    }

    .header-inner {
      min-height: 78px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 10px 0;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 14px;
      min-width: 0;
    }

    .brand-mark {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: white;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow: 0 12px 30px rgba(26, 77, 255, 0.25);
      flex: 0 0 auto;
    }

    .brand-text strong {
      display: block;
      font-size: 15px;
      line-height: 1.2;
      color: var(--primary);
    }

    .brand-text span {
      display: block;
      font-size: 12px;
      color: var(--muted);
      margin-top: 2px;
    }

    .nav {
      display: flex;
      align-items: center;
      gap: 20px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 600;
    }

    .nav a:hover {
      color: var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 700;
      font-size: 14px;
      cursor: pointer;
      transition: 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      color: white;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      box-shadow: 0 14px 30px rgba(26, 77, 255, 0.22);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 18px 36px rgba(26, 77, 255, 0.26);
    }

    .btn-secondary {
      background: white;
      color: var(--primary);
      border-color: rgba(11, 19, 84, 0.10);
    }

    .btn-secondary:hover {
      border-color: rgba(11, 19, 84, 0.22);
      transform: translateY(-1px);
    }

    .search {
      display: flex;
      align-items: center;
      background: white;
      border: 1px solid rgba(15, 23, 42, 0.08);
      border-radius: 999px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
    }

    .search input {
      border: 0;
      outline: none;
      padding: 0 16px;
      height: 44px;
      width: 220px;
      font-size: 14px;
      background: transparent;
    }

    .search button {
      border: 0;
      height: 44px;
      width: 48px;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      color: white;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      padding: 34px 0 34px;
    }

    .hero-card {
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.55);
      background:
        linear-gradient(135deg, rgba(11, 19, 84, 0.97), rgba(26, 77, 255, 0.90)),
        #0b1354;
      color: white;
      border-radius: 36px;
      box-shadow: var(--shadow);
      padding: 34px;
    }

    .hero-card::before {
      content: "";
      position: absolute;
      inset: auto -120px -140px auto;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.10);
      filter: blur(10px);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .pill-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 18px;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      height: 30px;
      padding: 0 12px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.02em;
    }

    .pill-red {
      background: rgba(225, 29, 72, 0.16);
      color: #ffd9e3;
      border: 1px solid rgba(255, 255, 255, 0.14);
    }

    .pill-light {
      background: rgba(255, 255, 255, 0.92);
      color: var(--primary);
    }

    .hero-kicker {
      color: #a7b7ff;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }

    .hero h1 {
      font-size: clamp(30px, 4.8vw, 52px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      margin-bottom: 18px;
      max-width: 12ch;
    }

    .hero p {
      color: rgba(255, 255, 255, 0.84);
      max-width: 640px;
      font-size: 16px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin-top: 28px;
    }

    .metric {
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.10);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(10px);
    }

    .metric strong {
      display: block;
      font-size: 18px;
      margin-bottom: 4px;
    }

    .metric span {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.82);
    }

    .hero-visual {
      display: grid;
      place-items: center;
      min-height: 420px;
    }

    .avatar {
      width: min(100%, 330px);
      aspect-ratio: 1;
      border-radius: 50%;
      background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.28), transparent 26%),
        linear-gradient(135deg, #ff4d6d, #ff8a3d 52%, #f97316);
      box-shadow: 0 30px 70px rgba(255, 77, 109, 0.25);
      border: 10px solid rgba(255, 255, 255, 0.14);
      display: grid;
      place-items: center;
      text-align: center;
      padding: 26px;
    }

    .avatar span {
      font-weight: 900;
      letter-spacing: 0.08em;
      font-size: 14px;
      text-transform: uppercase;
    }

    .avatar small {
      display: block;
      margin-top: 10px;
      font-size: 13px;
      opacity: 0.88;
    }

    /* Featured strip */
    .strip {
      margin-top: -10px;
      transform: translateY(-14px);
    }

    .strip-inner {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .strip-card {
      background: var(--surface);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border);
      border-radius: 22px;
      padding: 18px;
      box-shadow: var(--shadow-soft);
    }

    .strip-card strong {
      display: block;
      color: var(--primary);
      margin-bottom: 6px;
      font-size: 15px;
    }

    .strip-card span {
      color: var(--muted);
      font-size: 13px;
    }

    /* Cards */
    .grid {
      display: grid;
      gap: 18px;
    }

    .grid-4 {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .grid-3 {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .grid-2 {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card {
      background: var(--surface);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border);
      border-radius: var(--radius-xl);
      padding: 24px;
      box-shadow: var(--shadow-soft);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 42px rgba(15, 23, 42, 0.10);
      border-color: rgba(26, 77, 255, 0.14);
    }

    .card-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .avatar-sm {
      width: 62px;
      height: 62px;
      border-radius: 18px;
      background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
      display: grid;
      place-items: center;
      font-weight: 800;
      color: #1f2937;
      flex: 0 0 auto;
      border: 3px solid transparent;
    }

    .avatar-sm.blue { border-color: #60a5fa; }
    .avatar-sm.green { border-color: #34d399; }
    .avatar-sm.red { border-color: #fb7185; }
    .avatar-sm.orange { border-color: #fbbf24; }

    .card h3 {
      font-size: 18px;
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .card .sub {
      color: var(--muted);
      font-size: 13px;
    }

    .card p {
      color: #44506a;
      font-size: 14px;
      margin-top: 14px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .tag-blue { background: rgba(26, 77, 255, 0.10); color: var(--primary-2); }
    .tag-green { background: rgba(22, 163, 74, 0.10); color: var(--success); }
    .tag-orange { background: rgba(245, 158, 11, 0.12); color: #b45309; }
    .tag-pink { background: rgba(225, 29, 72, 0.10); color: var(--danger); }

    /* Highlights */
    .highlight {
      background:
        linear-gradient(180deg, rgba(255,255,255,0.90), rgba(255,255,255,0.78));
      border-radius: 34px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 30px;
    }

    .highlight p {
      color: #44506a;
    }

    .quote {
      max-width: 980px;
      margin: 22px auto 0;
      font-size: 16px;
      color: var(--primary);
      text-align: center;
      font-style: italic;
      padding: 18px 20px;
      border-left: 4px solid rgba(26, 77, 255, 0.24);
      background: rgba(26, 77, 255, 0.04);
      border-radius: 18px;
    }

    /* Pricing */
    .price-card {
      position: relative;
      background: white;
      border-radius: 28px;
      padding: 26px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-soft);
      overflow: hidden;
    }

    .price-card::before {
      content: "";
      position: absolute;
      inset: 0 auto auto 0;
      width: 100%;
      height: 6px;
      background: linear-gradient(90deg, var(--primary), var(--primary-2), var(--accent));
    }

    .price-card:nth-child(2)::before {
      background: linear-gradient(90deg, var(--success), #22c55e);
    }

    .price-card:nth-child(3)::before {
      background: linear-gradient(90deg, var(--warning), #fb7185);
    }

    .price-card .price {
      font-size: 34px;
      line-height: 1;
      color: var(--danger);
      font-weight: 900;
      margin: 18px 0 12px;
    }

    .price-card ul {
      list-style: none;
      margin-top: 18px;
      display: grid;
      gap: 10px;
    }

    .price-card li {
      color: #44506a;
      font-size: 14px;
      padding-left: 22px;
      position: relative;
    }

    .price-card li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--success);
      font-weight: 800;
    }

    .price-card .btn {
      width: 100%;
      margin-top: 20px;
    }

    /* Testimonials */
    .testimonial {
      background: white;
      border-radius: 24px;
      border: 1px solid var(--border);
      padding: 22px;
      box-shadow: var(--shadow-soft);
    }

    .testimonial .name {
      font-weight: 800;
      color: var(--primary);
      margin-top: 12px;
    }

    .testimonial .role {
      color: var(--muted);
      font-size: 13px;
    }

    .testimonial p {
      color: #44506a;
      margin-top: 12px;
      font-size: 14px;
    }

    /* Video / CTA */
    .media-box {
      background: linear-gradient(180deg, rgba(11, 19, 84, 0.98), rgba(26, 77, 255, 0.94));
      color: white;
      border-radius: 34px;
      padding: 34px;
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }

    .media-box::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -80px;
      top: -60px;
      border-radius: 50%;
      background: rgba(255,255,255,0.10);
    }

    .media-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: center;
    }

    .video-placeholder {
      min-height: 360px;
      border-radius: 26px;
      background:
        linear-gradient(135deg, rgba(255,255,255,0.14), rgba(255,255,255,0.06)),
        rgba(255,255,255,0.05);
      border: 1px dashed rgba(255,255,255,0.30);
      display: grid;
      place-items: center;
      text-align: center;
      padding: 24px;
      color: rgba(255,255,255,0.92);
      font-weight: 700;
    }

    .media-box .section-title,
    .media-box p {
      color: white;
    }

    .media-box p {
      color: rgba(255,255,255,0.84);
      margin-top: 10px;
    }

    /* Footer */
    footer {
      margin-top: 24px;
      background: #06102d;
      color: rgba(255,255,255,0.72);
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.7fr 1fr 1fr;
      gap: 26px;
    }

    .footer-title {
      color: white;
      font-size: 15px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-list {
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .footer-list a:hover {
      color: white;
    }

    .social-row {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .social {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: rgba(255,255,255,0.08);
      color: white;
      font-weight: 800;
    }

    .footer-bottom {
      margin-top: 34px;
      padding-top: 18px;
      border-top: 1px solid rgba(255,255,255,0.08);
      text-align: center;
      font-size: 12px;
      color: rgba(255,255,255,0.55);
    }

    /* Floating contacts */
    .floating {
      position: fixed;
      right: 18px;
      bottom: 18px;
      display: grid;
      gap: 10px;
      z-index: 60;
    }

    .floating a {
      width: 50px;
      height: 50px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: white;
      font-weight: 800;
      box-shadow: var(--shadow);
    }

    .zalo { background: linear-gradient(135deg, #00a0ff, #0061ff); }
    .phone { background: linear-gradient(135deg, #ef4444, #b91c1c); }
    .fb { background: linear-gradient(135deg, #1877f2, #0f4fd6); }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid,
      .media-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .strip-inner,
      .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .hero-visual {
        min-height: 300px;
      }

      .nav,
      .search {
        display: none;
      }
    }

    @media (max-width: 720px) {
      .section,
      .section-tight {
        padding: 54px 0;
      }

      .hero-card {
        padding: 22px;
        border-radius: 28px;
      }

      .strip {
        margin-top: 0;
        transform: none;
      }

      .strip-inner,
      .grid-4,
      .grid-3,
      .grid-2,
      .hero-metrics {
        grid-template-columns: 1fr;
      }

      .header-inner {
        min-height: 70px;
      }

      .brand-text span {
        display: none;
      }

      .header-actions .btn-secondary {
        display: none;
      }

      .video-placeholder {
        min-height: 240px;
      }

      .floating {
        right: 12px;
        bottom: 12px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }
      * {
        animation: none !important;
        transition: none !important;
      }
    }
  
/* CMS media fixes */
.brand-mark{overflow:hidden;}
.brand-mark img{width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block;}
.hero-main-image{width:min(100%,420px);aspect-ratio:1;border-radius:50%;object-fit:cover;box-shadow:0 30px 70px rgba(255,77,109,.25);border:10px solid rgba(255,255,255,.14);}
.teacher-img{object-fit:cover;padding:0!important;}
.video-placeholder{overflow:hidden;}
.video-placeholder iframe{width:100%;height:100%;min-height:340px;border:0;border-radius:22px;display:block;}
@media(max-width:720px){.video-placeholder iframe{min-height:220px}.hero-main-image{width:min(100%,320px)}}