:root {
      --ink: #100b0a;
      --ink-2: #1a1110;
      --ink-3: #261816;
      --surface: #fffaf8;
      --surface-2: #ffffff;
      --flare-a: #ff8a1f;
      --flare-b: #e31e24;
      --flare: linear-gradient(135deg, var(--flare-a), var(--flare-b));
      --muted: #6f5c56;
      --line: rgba(36, 20, 16, 0.1);
      --line-soft: rgba(255, 255, 255, 0.12);
      --text: #241712;
      --white: #ffffff;
      --radius: 18px;
      --shadow: 0 24px 60px rgba(16, 11, 10, 0.12);
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
      --font-display: 'Be Vietnam Pro', sans-serif;
      --font-body: 'Be Vietnam Pro', sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; overflow-x: clip; }
    body {
      font-family: var(--font-body);
      font-weight: 400;
      color: var(--text);
      background: var(--surface);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button { font: inherit; }

    .wrap {
      width: min(1160px, calc(100% - 48px));
      margin-inline: auto;
    }
    @media (max-width: 640px) {
      .wrap { width: min(1160px, calc(100% - 32px)); }
    }

    h1, h2, h3, .brand-type {
      font-family: var(--font-display);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.22;
    }

    /* ---------- Header ---------- */
    .site-header {
      position: fixed;
      inset: 0 0 auto;
      z-index: 60;
      transition: background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
      border-bottom: 1px solid transparent;
    }
    .site-header.is-scrolled,
    .site-header.is-solid {
      background: rgba(16, 11, 10, 0.82);
      backdrop-filter: blur(16px);
      border-bottom-color: var(--line-soft);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      padding: 18px 0;
      width: min(1160px, calc(100% - 48px));
      margin-inline: auto;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--white);
    }
    .logo img {
      width: 36px;
      height: 36px;
      object-fit: contain;
    }
    .logo span {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.02rem;
      letter-spacing: -0.03em;
    }
    .nav-links {
      display: flex;
      gap: 20px;
      font-size: 0.92rem;
      font-weight: 500;
      letter-spacing: -0.01em;
      color: rgba(255,255,255,0.78);
      flex-wrap: nowrap;
    }
    .nav-links a:hover { color: var(--white); }
    .nav-links a.is-active {
      color: var(--white);
      position: relative;
    }
    .nav-links a.is-active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -8px;
      height: 2px;
      border-radius: 2px;
      background: var(--flare);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      padding: 10px 18px;
      border-radius: 999px;
      background: var(--flare);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.88rem;
      letter-spacing: -0.01em;
      transition: transform .2s var(--ease), filter .2s;
    }
    .nav-cta:hover { transform: translateY(-1px); filter: brightness(1.06); }
    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line-soft);
      border-radius: 12px;
      background: transparent;
      color: var(--white);
      cursor: pointer;
      place-items: center;
    }
    .nav-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: currentColor;
      margin: 3px 0;
      transition: .25s var(--ease);
    }
    .mobile-panel { display: none; }
    @media (max-width: 860px) {
      .nav { position: relative; }
      .nav-links,
      .desktop-cta { display: none; }
      .nav-toggle { display: grid; }
      .mobile-panel {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        padding: 18px;
        background: rgba(16, 11, 10, 0.96);
        border: 1px solid var(--line-soft);
        border-radius: 16px;
        flex-direction: column;
        gap: 4px;
      }
      .mobile-panel.is-open { display: flex; }
      .mobile-panel a {
        color: rgba(255,255,255,0.8);
        padding: 12px 10px;
        border-radius: 10px;
      }
      .mobile-panel a:hover { background: rgba(255,255,255,0.06); color: #fff; }
      .mobile-panel .nav-cta {
        display: inline-flex;
        justify-content: center;
        margin-top: 8px;
      }
      .mobile-contact {
        margin-top: 10px;
        padding-top: 12px;
        border-top: 1px solid var(--line-soft);
        display: flex;
        flex-direction: column;
        gap: 2px;
      }
      .mobile-contact span {
        display: block;
        padding: 4px 10px 8px;
        font-size: 0.72rem;
        font-weight: 600;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: rgba(255,255,255,0.45);
      }
      .mobile-contact a {
        color: rgba(255,255,255,0.88);
        font-size: 0.92rem;
      }
    }

    /* ---------- Hero ---------- */
    .hero {
      position: relative;
      min-height: 100svh;
      display: grid;
      align-items: center;
      padding: 120px 0 72px;
      background:
        radial-gradient(ellipse 80% 60% at 70% 20%, rgba(255, 138, 31, 0.22), transparent 55%),
        radial-gradient(ellipse 70% 50% at 15% 80%, rgba(227, 30, 36, 0.18), transparent 50%),
        linear-gradient(165deg, #120c0b 0%, #1c100e 45%, #0d0908 100%);
      color: var(--white);
      overflow: hidden;
    }
    .hero-circuit {
      position: absolute;
      inset: 0;
      background-image:
        radial-gradient(circle at 18% 28%, rgba(255,138,31,0.35) 0 1.5px, transparent 2px),
        radial-gradient(circle at 72% 34%, rgba(227,30,36,0.4) 0 1.5px, transparent 2px),
        radial-gradient(circle at 48% 68%, rgba(255,138,31,0.3) 0 1.5px, transparent 2px),
        radial-gradient(circle at 84% 72%, rgba(227,30,36,0.28) 0 1.5px, transparent 2px);
      opacity: 0.9;
      pointer-events: none;
    }
    .hero-circuit::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(115deg, transparent 40%, rgba(255,138,31,0.05) 50%, transparent 60%),
        repeating-linear-gradient(
          -18deg,
          transparent 0 28px,
          rgba(255,255,255,0.015) 28px 29px
        );
      mask-image: radial-gradient(ellipse at 70% 40%, black 20%, transparent 70%);
    }
    .hero-logo {
      position: absolute;
      right: max(-6vw, -80px);
      top: 50%;
      transform: translateY(-52%);
      width: min(52vw, 560px);
      opacity: 0.55;
      pointer-events: none;
      animation: logoFloat 8s ease-in-out infinite;
      filter: drop-shadow(0 30px 80px rgba(227, 30, 36, 0.25));
    }
    @keyframes logoFloat {
      0%, 100% { transform: translateY(-52%) rotate(-2deg); }
      50% { transform: translateY(-56%) rotate(1deg); }
    }
    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 640px;
      margin-inline: 0 auto;
      padding-bottom: 24px;
    }
    .hero-brand {
      display: inline-flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 28px;
      opacity: 0;
      animation: rise .8s var(--ease) forwards .05s;
    }
    .hero-brand img {
      width: clamp(56px, 8vw, 78px);
      height: auto;
      filter: drop-shadow(0 8px 24px rgba(255, 138, 31, 0.35));
    }
    .hero-brand .brand-type {
      font-size: clamp(2.2rem, 5.5vw, 3.5rem);
      font-weight: 800;
      letter-spacing: -0.035em;
      line-height: 1.05;
      background: linear-gradient(115deg, #ff9a3c 0%, #ff8a1f 35%, #e31e24 100%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero h1 {
      font-size: clamp(1.65rem, 3.8vw, 2.65rem);
      max-width: 20ch;
      font-weight: 700;
      letter-spacing: -0.025em;
      line-height: 1.28;
      opacity: 0;
      animation: rise .85s var(--ease) forwards .2s;
    }
    .hero .lead {
      margin-top: 22px;
      max-width: 48ch;
      font-size: 1.05rem;
      font-weight: 400;
      line-height: 1.75;
      letter-spacing: 0;
      color: rgba(255,255,255,0.7);
      opacity: 0;
      animation: rise .85s var(--ease) forwards .35s;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 34px;
      opacity: 0;
      animation: rise .85s var(--ease) forwards .5s;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 26px;
      border-radius: 999px;
      background: var(--flare);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: -0.01em;
      transition: transform .2s var(--ease), filter .2s, box-shadow .2s;
      box-shadow: 0 10px 30px rgba(227, 30, 36, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      filter: brightness(1.05);
      box-shadow: 0 16px 36px rgba(227, 30, 36, 0.4);
    }
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      padding: 14px 26px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.28);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 500;
      font-size: 0.95rem;
      letter-spacing: -0.01em;
      transition: border-color .2s, background .2s;
    }
    .btn-ghost:hover {
      border-color: rgba(255,255,255,0.55);
      background: rgba(255,255,255,0.06);
    }
    @keyframes rise {
      from { opacity: 0; transform: translateY(16px); }
      to { opacity: 1; transform: translateY(0); }
    }
    @media (max-width: 900px) {
      .hero { align-items: center; padding: 110px 0 64px; }
      .hero-logo {
        opacity: 0.22;
        width: min(90vw, 420px);
        right: -10vw;
        top: 38%;
      }
      .hero-content { max-width: 100%; width: 100%; }
    }

    /* ---------- Sections ---------- */
    section { padding: 96px 0; }
    .section-head {
      max-width: none;
      margin-bottom: 48px;
    }
    .kicker {
      font-family: var(--font-body);
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--flare-b);
      margin-bottom: 12px;
    }
    .section-head h2 {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      line-height: 1.25;
      letter-spacing: -0.025em;
    }
    .section-head p {
      margin-top: 14px;
      color: var(--muted);
      font-size: 1.02rem;
      line-height: 1.7;
    }

    /* ---------- Products ---------- */
    .products-stack {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    @media (max-width: 760px) {
      .products-grid { grid-template-columns: 1fr; }
    }
    .product {
      position: relative;
      display: flex;
      flex-direction: column;
      min-height: 320px;
      border-radius: var(--radius);
      overflow: hidden;
      background: var(--surface-2);
      border: 1px solid var(--line);
      transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
    }
    .product:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow);
      border-color: rgba(227, 30, 36, 0.25);
    }
    .product-portal {
      min-height: 0;
    }
    .product-portal .product-body {
      display: grid;
      grid-template-columns: 1.1fr 1.4fr auto;
      gap: 20px 28px;
      align-items: end;
      padding: 28px 30px;
    }
    .product-portal .product-body .product-label { grid-column: 1; grid-row: 1; }
    .product-portal .product-body h3 { grid-column: 1; grid-row: 2; margin: 0; }
    .product-portal .product-body p {
      grid-column: 2;
      grid-row: 1 / span 2;
      align-self: center;
      margin: 0;
    }
    .product-portal .product-body .product-link {
      grid-column: 3;
      grid-row: 1 / span 2;
      align-self: center;
      margin: 0;
      padding: 0;
      border: 0;
      white-space: nowrap;
    }
    @media (max-width: 900px) {
      .product-portal .product-body {
        grid-template-columns: 1fr;
        gap: 10px;
      }
      .product-portal .product-body .product-label,
      .product-portal .product-body h3,
      .product-portal .product-body p,
      .product-portal .product-body .product-link {
        grid-column: 1;
        grid-row: auto;
      }
      .product-portal .product-body .product-link {
        border-top: 1px solid var(--line);
        padding-top: 12px;
        margin-top: 6px;
      }
    }
    .product-visual {
      position: relative;
      flex: 1;
      min-height: 150px;
      overflow: hidden;
    }
    .product-visual::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(16,11,10,0.55), transparent 55%);
      opacity: 0.35;
      pointer-events: none;
    }
    .viz {
      width: 100%;
      height: 100%;
      min-height: 160px;
    }
    .portal-visual {
      background:
        radial-gradient(ellipse at 20% 0%, rgba(255,138,31,0.16), transparent 45%),
        radial-gradient(ellipse at 90% 80%, rgba(227,30,36,0.14), transparent 40%),
        linear-gradient(160deg, #1a100e, #120c0b);
      padding: 28px 28px 24px;
      min-height: 0;
    }
    .portal-visual::after { display: none; }
    .portal-showcase {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    @media (max-width: 900px) {
      .portal-showcase {
        grid-template-columns: 1fr;
        gap: 16px;
      }
    }
    .portal-shot {
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-width: 0;
      transition: transform .35s var(--ease);
    }
    .portal-shot:hover { transform: translateY(-4px); }
    .portal-frame {
      position: relative;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.14);
      background: #fff;
      box-shadow: 0 18px 40px rgba(0,0,0,0.32);
    }
    .portal-chrome {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 10px 12px;
      background: #f3f4f6;
      border-bottom: 1px solid #e5e7eb;
    }
    .portal-chrome i {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: #d1d5db;
    }
    .portal-chrome i:nth-child(1) { background: #ff5f57; }
    .portal-chrome i:nth-child(2) { background: #febc2e; }
    .portal-chrome i:nth-child(3) { background: #28c840; }
    .portal-chrome span {
      margin-left: 6px;
      font-size: 0.72rem;
      color: #6b7280;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .portal-frame img {
      width: 100%;
      aspect-ratio: 16 / 11;
      object-fit: cover;
      object-position: top;
      display: block;
    }
    .portal-visual .portal-frame img {
      aspect-ratio: 16 / 10.5;
      min-height: 220px;
    }
    .portal-meta {
      display: flex;
      flex-direction: column;
      gap: 3px;
      padding: 0 2px;
    }
    .portal-meta strong {
      font-family: var(--font-display);
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--white);
      letter-spacing: -0.02em;
    }
    .portal-meta span {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.55);
    }
    .knowledge-visual,
    .meeting-visual,
    .exam-visual {
      background: linear-gradient(160deg, #1a100e, #120c0b);
      padding: 18px;
    }
    .knowledge-visual::after,
    .meeting-visual::after,
    .exam-visual::after { display: none; }
    .product-shot {
      display: block;
      transition: transform .35s var(--ease);
    }
    .product-shot:hover { transform: translateY(-3px); }
    .knowledge-visual .portal-frame img,
    .meeting-visual .portal-frame img,
    .exam-visual .portal-frame img {
      aspect-ratio: 16 / 9;
    }
    .viz-meeting {
      background:
        radial-gradient(circle at 30% 70%, rgba(227,30,36,0.4), transparent 45%),
        linear-gradient(160deg, #1a1210, #2c1814);
    }
    .viz-knowledge {
      background:
        radial-gradient(circle at 70% 40%, rgba(255,138,31,0.28), transparent 40%),
        linear-gradient(135deg, #160f0e, #2a1612);
    }
    .viz-exam {
      background: linear-gradient(150deg, #201310, #3d1f16);
    }
    .viz-finance {
      background: linear-gradient(160deg, #18100e, #2e1814);
    }
    .viz-grid {
      position: absolute;
      inset: 18px;
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 12px;
      display: grid;
      gap: 8px;
      padding: 14px;
      background: rgba(255,255,255,0.03);
    }
    .viz-row {
      height: 10px;
      border-radius: 999px;
      background: rgba(255,255,255,0.12);
    }
    .viz-row.accent { background: var(--flare); width: 62%; }
    .viz-row.mid { width: 78%; }
    .viz-row.short { width: 44%; }
    .viz-nodes {
      position: absolute;
      inset: 0;
      background-image:
        radial-gradient(circle at 20% 30%, #ff8a1f 0 3px, transparent 4px),
        radial-gradient(circle at 70% 25%, #e31e24 0 2.5px, transparent 3.5px),
        radial-gradient(circle at 55% 70%, #ff8a1f 0 2.5px, transparent 3.5px);
      opacity: 0.85;
    }
    .viz-wave {
      position: absolute;
      left: 10%;
      right: 10%;
      bottom: 28%;
      height: 40px;
      border-radius: 999px;
      background: linear-gradient(90deg, transparent, rgba(255,138,31,0.55), rgba(227,30,36,0.55), transparent);
      filter: blur(0.5px);
      opacity: 0.7;
      animation: pulseWave 3.2s ease-in-out infinite;
    }
    @keyframes pulseWave {
      0%, 100% { transform: scaleX(0.92); opacity: 0.45; }
      50% { transform: scaleX(1); opacity: 0.85; }
    }
    .product-body {
      padding: 22px 22px 24px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .product-label {
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--muted);
    }
    .badge-ai {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      width: fit-content;
      padding: 4px 10px;
      border-radius: 999px;
      background: rgba(227, 30, 36, 0.1);
      color: var(--flare-b);
      font-size: 0.74rem;
      font-weight: 600;
      letter-spacing: 0.02em;
    }
    .badge-ai i {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--flare-b);
      animation: blink 1.6s ease-in-out infinite;
    }
    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.35; }
    }
    .product h3 {
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      line-height: 1.3;
    }
    .product-exam h3,
    .product-emeeting h3 { font-size: 1.12rem; }
    .product p {
      color: var(--muted);
      font-size: 0.94rem;
      line-height: 1.65;
    }
    .product-link {
      margin-top: 10px;
      padding-top: 12px;
      border-top: 1px solid var(--line);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.9rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      color: var(--ink);
    }
    .product-link svg {
      width: 14px;
      height: 14px;
      transition: transform .25s var(--ease);
    }
    .product:hover .product-link svg { transform: translateX(4px); }

    /* ---------- Stats ---------- */
    .stats {
      background:
        radial-gradient(ellipse at 10% 0%, rgba(255,138,31,0.12), transparent 45%),
        radial-gradient(ellipse at 90% 100%, rgba(227,30,36,0.1), transparent 40%),
        var(--ink);
      color: var(--white);
      padding: 72px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    @media (max-width: 760px) {
      .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 18px; }
    }
    .stat-num {
      font-family: var(--font-display);
      font-size: clamp(2.1rem, 3.8vw, 2.85rem);
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.1;
      background: var(--flare);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .stat-label {
      margin-top: 10px;
      color: rgba(255,255,255,0.62);
      font-size: 0.92rem;
      line-height: 1.5;
      max-width: 18ch;
    }

    /* ---------- Benefits ---------- */
    .benefits {
      background: var(--surface-2);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .benefit-list {
      display: grid;
      gap: 0;
    }
    .benefit-item {
      display: grid;
      grid-template-columns: 64px 1fr;
      gap: 20px;
      padding: 28px 0;
      border-bottom: 1px solid var(--line);
      align-items: start;
    }
    .benefit-item:first-child { border-top: 1px solid var(--line); }
    .benefit-num {
      font-family: var(--font-display);
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: -0.04em;
      background: var(--flare);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      line-height: 1.2;
    }
    .benefit-item h3 {
      font-size: 1.25rem;
      margin-bottom: 8px;
    }
    .benefit-item p {
      color: var(--muted);
      max-width: 62ch;
      line-height: 1.7;
    }

    /* ---------- Process ---------- */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    @media (max-width: 900px) {
      .process-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 560px) {
      .process-grid { grid-template-columns: 1fr; }
    }
    .process-step {
      position: relative;
      padding-top: 8px;
    }
    .process-step .step-index {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--flare);
      color: var(--white);
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 16px;
    }
    .process-step h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .process-step p {
      color: var(--muted);
      font-size: 0.95rem;
      line-height: 1.65;
      max-width: 28ch;
    }

    /* ---------- Audience ---------- */
    .audience {
      background:
        radial-gradient(ellipse at 0% 50%, rgba(255,138,31,0.08), transparent 50%),
        var(--surface);
    }
    .audience-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 36px 40px;
    }
    @media (max-width: 800px) {
      .audience-grid { grid-template-columns: 1fr; gap: 28px; }
    }
    .audience-item h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
    }
    .audience-item p {
      color: var(--muted);
      line-height: 1.7;
    }
    .audience-item .tagline {
      display: block;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--flare-b);
      margin-bottom: 10px;
    }

    /* ---------- FAQ ---------- */
    .faq-list {
      max-width: 760px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .faq-item {
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--surface-2);
      overflow: hidden;
    }
    .faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 18px 20px;
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.02rem;
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: "+";
      font-family: var(--font-body);
      font-weight: 500;
      font-size: 1.35rem;
      color: var(--flare-b);
      line-height: 1;
      flex-shrink: 0;
    }
    .faq-item[open] summary::after { content: "–"; }
    .faq-item .faq-body {
      padding: 0 20px 18px;
      color: var(--muted);
      line-height: 1.7;
      font-size: 0.98rem;
    }

    /* ---------- Trusted ---------- */
    .logo-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
      gap: 16px 20px;
      align-items: stretch;
    }
    @media (max-width: 560px) {
      .logo-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    }
    .partner {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 132px;
      padding: 22px 16px;
      text-align: center;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: var(--surface-2);
      transition: border-color .25s, transform .25s var(--ease), box-shadow .25s;
    }
    .partner:hover {
      border-color: rgba(227, 30, 36, 0.28);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(16, 11, 10, 0.06);
    }
    .partner img {
      max-width: 100%;
      width: auto;
      height: 72px;
      object-fit: contain;
    }
    .partner-viettel img { height: 48px; }
    .partner-vnpt img { height: 58px; }
    .partner-quang-ninh img {
      height: 52px;
      border-radius: 6px;
    }

    /* ---------- CTA ---------- */
    .cta-band {
      position: relative;
      overflow: hidden;
      border-radius: 28px;
      padding: clamp(36px, 5vw, 56px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      flex-wrap: wrap;
      color: var(--white);
      background:
        radial-gradient(circle at 100% 0%, rgba(255,138,31,0.35), transparent 40%),
        radial-gradient(circle at 0% 100%, rgba(227,30,36,0.3), transparent 40%),
        linear-gradient(135deg, #1a100e, #100b0a);
      border: 1px solid rgba(255,255,255,0.08);
    }
    .cta-band h2 {
      font-size: clamp(1.45rem, 2.8vw, 2rem);
      max-width: 18ch;
      line-height: 1.28;
      letter-spacing: -0.025em;
    }
    .cta-band p {
      margin-top: 12px;
      color: rgba(255,255,255,0.68);
      max-width: 42ch;
      line-height: 1.7;
      font-size: 1rem;
    }
    .cta-contacts {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-top: 18px;
    }
    .cta-contacts a,
    .cta-contacts span {
      color: rgba(255,255,255,0.82);
      font-size: 0.95rem;
      line-height: 1.5;
    }
    .cta-contacts a:hover { color: var(--white); }
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 36px;
      align-items: start;
      border-radius: 28px;
      padding: clamp(32px, 4vw, 48px);
      color: var(--white);
      background:
        radial-gradient(circle at 100% 0%, rgba(255,138,31,0.28), transparent 42%),
        radial-gradient(circle at 0% 100%, rgba(227,30,36,0.22), transparent 40%),
        linear-gradient(135deg, #1a100e, #100b0a);
      border: 1px solid rgba(255,255,255,0.08);
      position: relative;
      overflow: hidden;
    }
    .contact-layout .cta-mark {
      position: absolute;
      right: -50px;
      bottom: -70px;
      width: 220px;
      opacity: 0.14;
      pointer-events: none;
    }
    .contact-intro h2 {
      font-size: clamp(1.45rem, 2.8vw, 2rem);
      line-height: 1.28;
      letter-spacing: -0.025em;
      max-width: 18ch;
    }
    .contact-intro > p {
      margin-top: 12px;
      color: rgba(255,255,255,0.68);
      line-height: 1.7;
      font-size: 1rem;
      max-width: 42ch;
    }
    .contact-form {
      display: grid;
      gap: 12px;
      position: relative;
      z-index: 1;
    }
    .contact-form label {
      display: grid;
      gap: 6px;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.02em;
      color: rgba(255,255,255,0.72);
    }
    .contact-form input,
    .contact-form textarea,
    .contact-form select {
      width: 100%;
      border: 1px solid rgba(255,255,255,0.14);
      background: rgba(255,255,255,0.06);
      color: var(--white);
      border-radius: 12px;
      padding: 12px 14px;
      font: inherit;
      font-size: 0.95rem;
      outline: none;
      transition: border-color .2s, background .2s;
    }
    .contact-form input::placeholder,
    .contact-form textarea::placeholder {
      color: rgba(255,255,255,0.38);
    }
    .contact-form input:focus,
    .contact-form textarea:focus,
    .contact-form select:focus {
      border-color: rgba(255,138,31,0.65);
      background: rgba(255,255,255,0.09);
    }
    .contact-form select {
      appearance: none;
      background-color: rgba(255,255,255,0.06);
      background-image: linear-gradient(45deg, transparent 50%, rgba(255,255,255,0.7) 50%), linear-gradient(135deg, rgba(255,255,255,0.7) 50%, transparent 50%);
      background-position: calc(100% - 18px) calc(50% - 3px), calc(100% - 12px) calc(50% - 3px);
      background-size: 6px 6px, 6px 6px;
      background-repeat: no-repeat;
      padding-right: 36px;
    }
    .contact-form select option {
      color: var(--text);
      background: var(--white);
    }
    .contact-form .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .contact-form .btn-primary {
      justify-content: center;
      margin-top: 4px;
      border: none;
      cursor: pointer;
      width: 100%;
    }
    .contact-form .form-note {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.45);
      line-height: 1.5;
    }
    .contact-form .form-status {
      font-size: 0.9rem;
      min-height: 1.4em;
    }
    .contact-form .form-status.is-ok { color: #8fdf9b; }
    .contact-form .form-status.is-err { color: #ff9b9b; }
    @media (max-width: 860px) {
      .contact-layout { grid-template-columns: 1fr; gap: 28px; }
      .contact-form .form-row { grid-template-columns: 1fr; }
    }
    @media (max-width: 760px) {
      .cta-contacts { width: 100%; }
    }
    .cta-mark {
      position: absolute;
      right: -40px;
      bottom: -60px;
      width: 220px;
      opacity: 0.18;
      pointer-events: none;
    }

    /* ---------- Footer ---------- */
    footer {
      background: var(--ink-2);
      color: rgba(255,255,255,0.62);
      padding: 64px 0 100px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 40px;
    }
    @media (max-width: 800px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .footer-col-brand { grid-column: 1 / -1; }
      .footer-col-contact { order: 2; }
      .footer-col-products { order: 3; }
      .footer-col-company { order: 4; }
    }
    @media (max-width: 480px) {
      .footer-grid { grid-template-columns: 1fr; }
    }
    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--white);
      margin-bottom: 14px;
    }
    .footer-brand img { width: 32px; height: 32px; }
    .footer-brand span {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.05rem;
      letter-spacing: -0.03em;
    }
    .footer-grid p { max-width: 42ch; font-size: 0.94rem; line-height: 1.65; }
    .footer-legal {
      margin-top: 12px;
      font-size: 0.82rem;
      color: rgba(255,255,255,0.48);
      line-height: 1.55;
      max-width: 42ch;
    }
    .footer-contact-line {
      display: block;
      padding: 5px 0;
      font-size: 0.95rem;
      color: #AEB8C6;
      line-height: 1.55;
    }
    .footer-grid a.footer-contact-line:hover { color: var(--white); }
    .footer-grid h4 {
      font-family: var(--font-body);
      color: var(--white);
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .footer-grid a {
      display: block;
      padding: 5px 0;
      font-size: 0.95rem;
      transition: color .2s;
    }
    .footer-grid a:hover { color: var(--white); }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 22px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 0.85rem;
      color: rgba(255,255,255,0.42);
    }

    /* ---------- Floating actions ---------- */
    .float-actions {
      position: fixed;
      right: max(12px, env(safe-area-inset-right));
      bottom: max(16px, env(safe-area-inset-bottom));
      z-index: 9999;
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: center;
      pointer-events: none;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      border: 1px solid rgba(255, 255, 255, 0.18);
      cursor: pointer;
      color: var(--white);
      background: var(--flare);
      box-shadow: 0 10px 28px rgba(227, 30, 36, 0.35);
      transition: transform .2s var(--ease), filter .2s, opacity .25s, visibility .25s;
      text-decoration: none;
      pointer-events: auto;
      -webkit-tap-highlight-color: transparent;
    }
    .float-btn:hover { transform: translateY(-2px); filter: brightness(1.08); }
    .float-btn svg { width: 22px; height: 22px; display: block; }
    .float-top {
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
    }
    .float-top.is-visible {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }
    @media (max-width: 640px) {
      .float-actions {
        right: max(10px, env(safe-area-inset-right));
        bottom: max(18px, env(safe-area-inset-bottom));
        gap: 8px;
      }
      .float-btn {
        width: 46px;
        height: 46px;
        box-shadow: 0 8px 22px rgba(16, 11, 10, 0.35);
      }
      .float-btn svg { width: 20px; height: 20px; }
      #contact .contact-layout,
      footer .wrap {
        padding-right: 64px;
      }
    }

    /* ---------- Reveal ---------- */
    .reveal {
      opacity: 0;
      transform: translateY(36px);
      transition:
        opacity .8s var(--ease),
        transform .8s var(--ease);
      transition-delay: var(--reveal-delay, 0ms);
      will-change: opacity, transform;
    }
    .reveal.is-in {
      opacity: 1;
      transform: none;
    }
    .reveal-left {
      transform: translateX(-28px);
    }
    .reveal-right {
      transform: translateX(28px);
    }
    .reveal-scale {
      transform: translateY(24px) scale(0.96);
    }
    .reveal-left.is-in,
    .reveal-right.is-in,
    .reveal-scale.is-in {
      transform: none;
    }
    @media (prefers-reduced-motion: reduce) {
      .reveal,
      .reveal-left,
      .reveal-right,
      .reveal-scale {
        opacity: 1;
        transform: none;
        transition: none;
      }
    }

    /* ---------- Inner page: Cam ket An toan thong tin ---------- */
    .subpage-head {
      padding: 128px 0 12px;
    }
    .subpage-head .section-head {
      margin-bottom: 28px;
    }
    .subpage-head h1 {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      line-height: 1.25;
      letter-spacing: -0.025em;
      font-weight: 700;
    }
    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      margin-bottom: 22px;
      font-size: 0.86rem;
      color: var(--muted);
    }
    .breadcrumb a:hover { color: var(--ink); }
    .breadcrumb span[aria-hidden="true"] { opacity: 0.45; }

    .pledge-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .pledge-card {
      background: var(--surface-2);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px 20px 24px;
      box-shadow: 0 16px 40px rgba(16, 11, 10, 0.06);
    }
    .pledge-card strong {
      display: block;
      font-family: var(--font-display);
      font-size: 1.1rem;
      letter-spacing: -0.02em;
      margin-bottom: 8px;
    }
    .pledge-card p {
      color: var(--muted);
      font-size: 0.94rem;
      line-height: 1.65;
    }
    .pledge-kicker {
      font-family: var(--font-body);
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--flare-b);
      margin-bottom: 10px;
    }
    .security-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin-top: 32px;
      align-items: center;
    }
    .product-page-cta {
      margin-top: 24px;
    }
    .security-cta .btn-ghost {
      color: var(--ink);
      background: var(--surface-2);
      border: 1px solid rgba(36, 20, 16, 0.22);
      box-shadow: 0 8px 20px rgba(16, 11, 10, 0.06);
    }
    .security-cta .btn-ghost:hover {
      border-color: rgba(227, 30, 36, 0.45);
      background: var(--surface-2);
      transform: translateY(-1px);
      box-shadow: 0 12px 24px rgba(16, 11, 10, 0.08);
    }
    @media (max-width: 960px) {
      .pledge-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 560px) {
      .pledge-grid { grid-template-columns: 1fr; }
    }

    .product-page-visual {
      margin-top: 20px;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      background: #fff;
    }
    .product-page-visual img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      object-position: top;
    }
    .product-more {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 18px;
    }
    .article-block .product-more a {
      display: block;
      padding: 16px 18px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--surface-2);
      font-weight: 400;
      text-decoration: none;
      color: inherit;
      transition: border-color .25s, transform .25s var(--ease), box-shadow .25s;
    }
    .article-block .product-more a:hover {
      border-color: rgba(227, 30, 36, 0.28);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(16, 11, 10, 0.06);
    }
    .product-more strong {
      display: block;
      font-family: var(--font-display);
      font-size: 0.98rem;
      color: var(--ink);
      margin-bottom: 4px;
    }
    .product-more span {
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.5;
    }
    @media (max-width: 640px) {
      .product-more { grid-template-columns: 1fr; }
    }
    .sec-page { padding: 12px 0 96px; }
    .sec-layout {
      display: grid;
      grid-template-columns: 220px minmax(0, 1fr);
      gap: 56px;
      align-items: start;
    }
    .sec-toc {
      position: sticky;
      top: 96px;
      padding: 8px 0;
    }
    .sec-toc .toc-label {
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 14px;
    }
    .sec-toc a {
      display: block;
      padding: 7px 0;
      font-size: 0.9rem;
      color: var(--muted);
      border-left: 2px solid transparent;
      padding-left: 12px;
      line-height: 1.4;
    }
    .sec-toc a:hover,
    .sec-toc a.is-active {
      color: var(--ink);
      border-left-color: var(--flare-b);
    }
    .article-block {
      padding: 8px 0 52px;
      border-bottom: 1px solid var(--line);
      scroll-margin-top: 96px;
    }
    .article-block:last-child { border-bottom: 0; padding-bottom: 0; }
    .article-block h2 {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      line-height: 1.25;
      letter-spacing: -0.025em;
      margin-bottom: 16px;
    }
    .article-block h3 {
      font-size: 1.25rem;
      margin: 28px 0 10px;
    }
    .article-block p,
    .article-block li {
      color: var(--muted);
      font-size: 1.02rem;
      line-height: 1.7;
    }
    .article-block p + p { margin-top: 14px; }
    .article-block ul,
    .article-block ol {
      margin: 14px 0 0 1.15em;
      display: grid;
      gap: 8px;
    }
    .faq-item .faq-body a {
      color: var(--ink);
      font-weight: 600;
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .article-block a {
      color: var(--ink);
      font-weight: 600;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .callout {
      margin: 22px 0 0;
      padding: 18px 20px;
      border-radius: 14px;
      border: 1px solid rgba(227, 30, 36, 0.18);
      background: linear-gradient(135deg, rgba(255,138,31,0.07), rgba(227,30,36,0.05));
    }
    .callout strong {
      display: block;
      color: var(--ink);
      margin-bottom: 6px;
      font-size: 0.98rem;
    }
    .callout p { font-size: 0.95rem; }

    .scope-list {
      display: grid;
      gap: 12px;
      margin-top: 20px;
    }
    .scope-item {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 16px;
      padding: 16px 18px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--surface-2);
    }
    .scope-item strong {
      font-size: 0.92rem;
      letter-spacing: -0.01em;
    }
    .scope-item span {
      color: var(--muted);
      font-size: 0.94rem;
      line-height: 1.65;
    }
    @media (max-width: 640px) {
      .scope-item { grid-template-columns: 1fr; gap: 6px; }
    }

    .principle-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 22px;
    }
    .principle {
      padding: 20px 20px 22px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: var(--surface-2);
    }
    .principle .num {
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 0.92rem;
      letter-spacing: -0.03em;
      background: var(--flare);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 8px;
    }
    .principle h3 { margin: 0 0 8px; font-size: 1.05rem; }
    .principle p { font-size: 0.94rem; }
    @media (max-width: 700px) {
      .principle-grid { grid-template-columns: 1fr; }
    }

    .sla-wrap {
      margin-top: 22px;
      overflow-x: auto;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: var(--surface-2);
    }
    .sla-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 640px;
    }
    .sla-table th,
    .sla-table td {
      padding: 14px 16px;
      text-align: left;
      font-size: 0.92rem;
      line-height: 1.55;
      border-bottom: 1px solid var(--line);
      vertical-align: top;
    }
    .sla-table th {
      background: var(--ink);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.78rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }
    .sla-table tr:last-child td { border-bottom: 0; }
    .sla-table td:first-child { font-weight: 600; color: var(--ink); white-space: nowrap; }

    .duty-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 22px;
    }
    .duty-card {
      padding: 22px 22px 24px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: var(--surface-2);
    }
    .duty-card h3 { margin: 0 0 12px; font-size: 1.08rem; }
    .duty-card li { font-size: 0.95rem; }
    @media (max-width: 760px) {
      .duty-grid { grid-template-columns: 1fr; }
    }

    .report-box {
      margin-top: 22px;
      padding: 24px 26px;
      border-radius: 18px;
      color: var(--white);
      background:
        radial-gradient(circle at 100% 0%, rgba(255,138,31,0.28), transparent 42%),
        linear-gradient(135deg, #1a100e, #100b0a);
      border: 1px solid rgba(255,255,255,0.08);
    }
    .report-box h3 { margin: 0 0 8px; }
    .report-box p { color: rgba(255,255,255,0.7); }
    .contact-layout .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    @media (max-width: 900px) {
      .sec-layout { grid-template-columns: 1fr; gap: 28px; }
      .sec-toc { position: static; display: flex; flex-wrap: wrap; gap: 4px 16px; }
      .sec-toc .toc-label { width: 100%; margin-bottom: 4px; }
      .sec-toc a {
        border-left: 0;
        padding: 6px 0;
        font-size: 0.86rem;
      }
    }