/* roulang page: index */
:root {
      --primary: #059669;
      --primary-dark: #047857;
      --primary-light: #10B981;
      --accent-orange: #F97316;
      --accent-orange-hover: #EA580C;
      --bg-white: #FFFFFF;
      --bg-light: #F8FAFC;
      --bg-slate: #F1F5F9;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      padding-bottom: 70px; /* Space for mobile nav */
    }

    @media (min-width: 1024px) {
      body {
        padding-bottom: 0;
      }
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    a:hover, a:focus {
      color: var(--primary);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-wrap {
      padding: 72px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-wrap.bg-white { background-color: var(--bg-white); }
    .section-wrap.bg-light { background-color: var(--bg-light); }
    .section-wrap.bg-dark { 
      background-color: var(--bg-dark); 
      color: #FFFFFF;
      border-bottom-color: var(--border-dark);
    }

    .section-head {
      margin-bottom: 40px;
    }
    .section-head.text-center { text-align: center; }
    .section-head .badge-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: rgba(5, 150, 105, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-wrap.bg-dark .badge-tag {
      background: rgba(16, 185, 129, 0.2);
      color: var(--primary-light);
    }
    .section-head h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-wrap.bg-dark h2 { color: #FFFFFF; }
    .section-head p {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }
    .section-wrap.bg-dark p { color: var(--text-light); }

    /* Button Styles */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 600;
      padding: 11px 24px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
    }
    .btn-orange {
      background-color: var(--accent-orange);
      color: #FFFFFF;
    }
    .btn-orange:hover {
      background-color: var(--accent-orange-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* Top Dual Header */
    .header-topbar {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid #1E293B;
    }
    .header-topbar .flex-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .header-topbar a { color: #CBD5E1; }
    .header-topbar a:hover { color: #FFFFFF; }

    .site-header {
      background-color: #FFFFFF;
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-mark {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 800;
      font-size: 18px;
    }
    .logo-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .nav-menu {
      display: none;
      list-style: none;
      align-items: center;
      gap: 24px;
      margin: 0;
    }
    @media (min-width: 900px) {
      .nav-menu { display: flex; }
    }
    .nav-menu li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }
    .nav-menu li a:hover, .nav-menu li a.active {
      color: var(--primary);
    }
    .nav-menu li a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    /* Hero Blueprint: Coupon/Voucher Wall Entry */
    .hero-section {
      background-color: var(--bg-white);
      padding: 48px 0 60px;
      background-image: radial-gradient(rgba(5, 150, 105, 0.04) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 40px;
      align-items: center;
    }
    @media (min-width: 992px) {
      .hero-grid {
        grid-template-columns: 1.1fr 0.9fr;
      }
    }
    .hero-text h1 {
      font-size: 34px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    @media (min-width: 768px) {
      .hero-text h1 { font-size: 42px; }
    }
    .hero-text p.lead {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .hero-meta-points {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }
    .meta-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--bg-slate);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-main);
    }
    .meta-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--primary-light);
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }

    /* Coupon Card in Hero */
    .voucher-card {
      background: #FFFFFF;
      border: 2px dashed #10B981;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: 0 10px 30px rgba(5, 150, 105, 0.08);
      position: relative;
      overflow: hidden;
    }
    .voucher-tag {
      position: absolute;
      top: 16px;
      right: -32px;
      background: var(--accent-orange);
      color: #FFF;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 36px;
      transform: rotate(45deg);
    }
    .voucher-header {
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 16px;
      margin-bottom: 18px;
    }
    .voucher-amount {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      font-family: monospace;
    }
    .voucher-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 4px;
    }
    .voucher-perks {
      list-style: none;
      margin-bottom: 20px;
    }
    .voucher-perks li {
      font-size: 13px;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .voucher-perks li::before {
      content: '✓';
      color: var(--primary);
      font-weight: bold;
    }

    /* Blueprint Section: 资料目录 / 协议规范清单 */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .catalog-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .catalog-item:hover {
      border-color: var(--primary-light);
      transform: translateY(-3px);
      box-shadow: var(--shadow-card);
    }
    .catalog-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      font-family: monospace;
      margin-bottom: 8px;
    }
    .catalog-item h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .catalog-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 4-col Hardware Matrix */
    .hardware-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
    }
    .hardware-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 20px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .hardware-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .hardware-badge {
      font-size: 12px;
      background: var(--bg-slate);
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .hardware-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .hardware-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-bottom: 14px;
    }
    .proto-tag {
      font-size: 12px;
      color: var(--primary);
      font-weight: 600;
    }

    /* Asymmetric Architecture Section */
    .arch-split {
      display: grid;
      grid-template-columns: 1fr;
      gap: 36px;
      align-items: center;
    }
    @media (min-width: 900px) {
      .arch-split {
        grid-template-columns: 1.1fr 0.9fr;
      }
    }
    .arch-content h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .arch-content p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .arch-box {
      background: var(--bg-slate);
      border-left: 4px solid var(--primary);
      padding: 16px 20px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-size: 14px;
      color: var(--text-main);
      margin-bottom: 24px;
    }

    /* 6 Cards Technical Advantages */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .tech-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 28px;
      border-radius: var(--radius-md);
      transition: var(--transition);
    }
    .tech-card:hover {
      box-shadow: var(--shadow-card);
      border-color: var(--primary-light);
      transform: translateY(-3px);
    }
    .tech-card .icon-label {
      width: 42px;
      height: 42px;
      background: rgba(5, 150, 105, 0.08);
      color: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
      font-size: 16px;
    }
    .tech-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .tech-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3 Big Solutions */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 28px;
    }
    .sol-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .sol-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .sol-img-box {
      height: 200px;
      overflow: hidden;
      background: #E2E8F0;
    }
    .sol-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
      border-radius: 0;
    }
    .sol-card:hover .sol-img-box img {
      transform: scale(1.04);
    }
    .sol-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .sol-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .sol-body h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .sol-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
      margin-bottom: 16px;
    }

    /* Dark Holo Dashboard Simulation */
    .console-dashboard {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 28px;
    }
    .dash-topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 16px;
      margin-bottom: 24px;
    }
    .dash-title {
      font-size: 16px;
      font-weight: 600;
      color: #E2E8F0;
    }
    .dash-status {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      color: #10B981;
    }
    .dash-status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10B981;
      box-shadow: 0 0 8px #10B981;
    }
    .dash-metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      margin-bottom: 24px;
    }
    .dash-metric-item {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 16px;
    }
    .dash-metric-item .name {
      font-size: 12px;
      color: #94A3B8;
      margin-bottom: 6px;
    }
    .dash-metric-item .val {
      font-size: 24px;
      font-weight: 700;
      color: #38BDF8;
      font-family: monospace;
    }

    /* Story Section */
    .story-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr;
    }
    @media (min-width: 900px) {
      .story-card {
        grid-template-columns: 1fr 1fr;
      }
    }
    .story-img {
      min-height: 280px;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 0;
    }
    .story-body {
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-body h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .story-body p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    /* Key Stats Bar */
    .stats-bar {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      text-align: center;
    }
    @media (min-width: 768px) {
      .stats-bar {
        grid-template-columns: repeat(4, 1fr);
      }
    }
    .stat-item .num {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      font-family: monospace;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-item .label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 5-Step Flow */
    .stepper-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFF;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 15px;
    }
    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Testimonials / Social Proof */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .testi-quote {
      font-size: 14.5px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }
    .testi-meta h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 2px;
    }
    .testi-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* News Grid */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-card);
    }
    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
      margin-bottom: 16px;
    }

    /* Partners Wall */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    @media (min-width: 640px) {
      .partner-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (min-width: 1024px) {
      .partner-grid { grid-template-columns: repeat(6, 1fr); }
    }
    .partner-box {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px 12px;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .partner-box:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    /* Accordion FAQ */
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-item details {
      width: 100%;
    }
    .faq-item summary {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      font-weight: 700;
    }
    .faq-item details[open] summary::after {
      content: '−';
    }
    .faq-body {
      padding: 0 24px 20px;
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid var(--bg-slate);
    }

    /* Conversion Form Section */
    .cta-split {
      display: grid;
      grid-template-columns: 1fr;
      gap: 36px;
    }
    @media (min-width: 900px) {
      .cta-split {
        grid-template-columns: 1fr 1fr;
        align-items: center;
      }
    }
    .cta-form-box {
      background: var(--bg-white);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-hover);
      border: 1px solid var(--border-color);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
    }
    select.form-control {
      appearance: auto;
    }

    /* Footer */
    .site-footer {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 56px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 36px;
      padding-bottom: 48px;
      border-bottom: 1px solid #1E293B;
    }
    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
      }
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 14px;
    }
    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-col ul li a {
      color: #94A3B8;
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding: 24px 0;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }

    /* Mobile Bottom Tab Bar */
    .mobile-tab-nav {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      display: flex;
      justify-content: space-around;
      align-items: center;
      z-index: 999;
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    }
    @media (min-width: 1024px) {
      .mobile-tab-nav { display: none; }
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-size: 11px;
      width: 25%;
      height: 100%;
    }
    .tab-item.active, .tab-item:active {
      color: var(--primary);
      font-weight: 600;
    }
    .tab-icon {
      font-size: 18px;
      margin-bottom: 2px;
      line-height: 1;
    }