* { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1d1d1f; }

    /* ===== NAVBAR ===== */
    .navbar {
      background: #1d1d1f;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 48px;
      height: 56px;
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .navbar-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }
    .logo-topzone {
      font-size: 22px;
      font-weight: 700;
      color: #fff;
      letter-spacing: -1px;
    }
    .logo-topzone span { color: #ff3b30; }
    .logo-premium {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1px;
    }
    .logo-premium .apple-icon { color: #fff; font-size: 13px; }
    .logo-premium .pr-text { color: #aaa; font-size: 9px; letter-spacing: 1px; text-transform: uppercase; }
    .navbar-menu {
      display: flex;
      list-style: none;
      gap: 6px;
    }
    .navbar-menu li a {
      color: #f5f5f7;
      text-decoration: none;
      font-size: 13px;
      padding: 6px 12px;
      border-radius: 4px;
      transition: background 0.2s;
    }
    .navbar-menu li a:hover { background: rgba(255,255,255,0.1); }
    .navbar-menu li.active a {
      background: #fff;
      color: #1d1d1f;
      font-weight: 600;
    }
    .navbar-actions { display: flex; gap: 16px; align-items: center; }
    .navbar-actions a { color: #f5f5f7; font-size: 18px; text-decoration: none; transition: color 0.2s; }
    .navbar-actions a:hover { color: #0071e3; }
    .navbar-address {
      display: flex;
      align-items: center;
      gap: 6px;
      color: #f5f5f7;
      font-size: 13px;
      text-decoration: none;
      white-space: nowrap;
    }
    .navbar-address:hover { color: #0071e3; }
    .navbar-address .fa-location-dot { font-size: 14px; color: #ff3b30; }
    .addr-short { display: none; }


    /* ===== SECTION COMMON ===== */
    section { padding: 64px 48px; }
    .section-title {
      text-align: center;
      font-size: 38px;
      font-weight: 700;
      margin-bottom: 56px;
      color: #1d1d1f;
    }

    /* ===== REPAIR SERVICES ===== */
    #repair { background: #fff; }
    .repair-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px 32px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .repair-card {
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 14px;
      height: 100%;
    }
    .repair-card-img {
      width: 210px;
      height: 170px;
      object-fit: contain;
      flex-shrink: 0;
    }
    .repair-card h3 {
      font-size: 20px;
      font-weight: 700;
    }
    .repair-card p {
      font-size: 15px;
      color: #6e6e73;
      line-height: 1.6;
      flex: 1;
    }
    .repair-card a.see-price {
      color: #0071e3;
      font-size: 15px;
      text-decoration: none;
      margin-top: auto;
    }
    .repair-card a.see-price:hover { text-decoration: underline; }

    /* ===== REASONS ===== */
    #reasons { background: #f5f5f7; }
    .reasons-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 32px 32px;
      max-width: 1200px;
      margin: 0 auto;
    }
    .reason-item { display: flex; flex-direction: column; gap: 10px; }
    .reason-item .reason-icon { font-size: 32px; color: #1d1d1f; }
    .reason-item h3 { font-size: 17px; font-weight: 700; }
    .reason-item p { font-size: 14px; color: #6e6e73; line-height: 1.6; }

    /* ===== ACCESSORIES ===== */
    #accessories { background: #fff; }
    .accessories-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px 24px;
      max-width: 960px;
      margin: 0 auto 16px;
    }
    .accessory-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      cursor: pointer;
      transition: transform 0.2s;
    }
    .accessory-item:hover { transform: translateY(-4px); }
    .accessory-item img {
      width: 130px;
      height: 110px;
      object-fit: contain;
    }
    .accessory-item span { font-size: 14px; color: #1d1d1f; }
    .accessories-note {
      text-align: center;
      font-size: 12px;
      color: #6e6e73;
      font-style: italic;
      max-width: 960px;
      margin: 0 auto;
    }

    /* ===== WARRANTY PROCESS ===== */
    #warranty { background: #f5f5f7; }
    .warranty-steps {
      display: flex;
      justify-content: center;
      gap: 0;
      max-width: 900px;
      margin: 0 auto 16px;
      position: relative;
    }
    .warranty-steps::before {
      content: '';
      position: absolute;
      top: 28px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: #d2d2d7;
      z-index: 0;
    }
    .warranty-step {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      text-align: center;
      position: relative;
      z-index: 1;
    }
    .step-icon-wrap {
      width: 56px;
      height: 56px;
      background: #fff;
      border: 2px solid #d2d2d7;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: #1d1d1f;
    }
    .warranty-step p {
      font-size: 13px;
      color: #1d1d1f;
      line-height: 1.5;
      max-width: 100px;
    }
    .warranty-note {
      text-align: center;
      font-size: 13px;
      color: #6e6e73;
      font-style: italic;
      max-width: 900px;
      margin: 0 auto;
    }
    .warranty-note a { color: #0071e3; text-decoration: none; }
    .warranty-note a:hover { text-decoration: underline; }

    /* ===== TOPCARE HERO (dark) ===== */
    #topcare-hero {
      background: #000;
      padding: 64px 48px 0;
      text-align: center;
    }
    .topcare-hero-title {
      color: #fff;
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 32px;
    }
    .topcare-logo-text {
      display: inline-flex;
      align-items: baseline;
      gap: 0;
      font-size: 56px;
      font-weight: 900;
      text-transform: lowercase;
      margin-bottom: 24px;
    }
    .topcare-logo-text .top { color: #fff; }
    .topcare-logo-text .c { color: #ff3b30; }
    .topcare-logo-text .a { color: #30d158; }
    .topcare-logo-text .r { color: #0071e3; }
    .topcare-logo-text .e { color: #ff9f0a; }
    .topcare-hero-desc {
      color: #f5f5f7;
      font-size: 16px;
      line-height: 1.7;
      max-width: 620px;
      margin: 0 auto 48px;
    }

    /* ===== IMAGE SLIDER ===== */
    .slider-container {
      position: relative;
      overflow: hidden;
      width: 100%;
      max-width: 100%;
    }
    .slider-track {
      display: flex;
      transition: transform 0.5s ease;
    }
    .slider-track img {
      min-width: 33.333%;
      height: 500px;
      object-fit: cover;
      border-radius: 12px;
      padding: 0 6px;
    }
    .slider-dots {
      display: flex;
      justify-content: center;
      gap: 8px;
      padding: 20px 0 32px;
      background: #000;
    }
    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #555;
      cursor: pointer;
      transition: background 0.2s;
    }
    .dot.active { background: #fff; }

    /* ===== FLOATING BUTTONS ===== */
    .float-buttons {
      position: fixed;
      bottom: 24px;
      right: 24px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }
    .float-btn {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: #fff;
      text-decoration: none;
      box-shadow: 0 4px 16px rgba(0,0,0,0.25);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .float-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 20px rgba(0,0,0,0.35);
    }
    .float-btn.call  { background: #30d158; }
    .float-btn.fb    { background: #1877f2; }
    /* pulse animation on call button */
    .float-btn.call {
      animation: pulse-call 2s infinite;
    }
    @keyframes pulse-call {
      0%   { box-shadow: 0 0 0 0 rgba(48,209,88,0.6); }
      70%  { box-shadow: 0 0 0 12px rgba(48,209,88,0); }
      100% { box-shadow: 0 0 0 0 rgba(48,209,88,0); }
    }

    /* ===== FOOTER ===== */
    footer {
      background: #1d1d1f;
      color: #6e6e73;
      text-align: center;
      padding: 24px;
      font-size: 13px;
    }
    footer strong { color: #f5f5f7; }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 768px) {
      .navbar { padding: 0 16px; }
      .navbar-menu { display: none; }
      .logo-premium { display: none !important; }
      .navbar-address { font-size: 10px; white-space: nowrap; }
      .addr-icon { display: none !important; }
      .addr-full { display: none !important; }
      .addr-short { display: inline !important; }

      section { padding: 40px 16px; }

      /* Section title nhỏ lại cho vừa màn hình */
      .section-title { font-size: 24px; margin-bottom: 28px; }

      /* Repair – 2 cột, ảnh thu nhỏ theo cột */
      .repair-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 12px; }
      .repair-card-img { width: 100%; max-width: 130px; height: 105px; }
      .repair-card h3 { font-size: 14px; }
      .repair-card p { font-size: 12px; }
      .repair-card a.see-price { font-size: 12px; }

      /* Reasons – 1 cột để tránh tràn chữ */
      .reasons-grid { grid-template-columns: 1fr; gap: 24px; }

      /* Accessories – 2 cột */
      .accessories-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 12px; }
      .accessory-item img { width: 100px; height: 85px; }

      /* Warranty steps – 2 cột dạng lưới */
      .warranty-steps { flex-wrap: wrap; gap: 20px 12px; }
      .warranty-steps::before { display: none; }
      .warranty-step { flex: 0 0 calc(50% - 6px); }

      /* Slider – 1 ảnh/lần */
      .slider-track img { min-width: 100%; height: 240px; }

      .topcare-logo-text { font-size: 36px; }
      .topcare-hero-desc { font-size: 14px; }
    }