/* roulang page: index */
:root {
      --primary: #0A2540;
      --primary-dark: #061626;
      --primary-light: #163B66;
      --accent: #00D4B2;
      --accent-hover: #00b395;
      --accent-subtle: rgba(0, 212, 178, 0.12);
      --gold-vip: #D4AF37;
      --gold-dark: #1E1A11;
      --bg-base: #F8FAFC;
      --bg-surface: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-subtle: rgba(226, 232, 240, 0.8);
      --shadow-sm: 0 4px 6px -1px rgba(10, 37, 64, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(10, 37, 64, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(10, 37, 64, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --radius-full: 9999px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Topbar */
    .topbar {
      background: #061524;
      color: #94A3B8;
      font-size: 0.825rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 0;
    }
    .topbar-items {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .topbar-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
      display: inline-block;
    }

    /* Main Navbar */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary) 0%, #0052CC 100%);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.15rem;
      box-shadow: 0 4px 10px rgba(0, 82, 204, 0.3);
      border: 1px solid rgba(0, 212, 178, 0.4);
    }
    .brand-logo-text {
      display: flex;
      flex-direction: column;
    }
    .brand-logo-text .title {
      font-size: 1.15rem;
      line-height: 1.2;
      color: var(--primary);
    }
    .brand-logo-text .subtitle {
      font-size: 0.65rem;
      font-weight: 500;
      color: #64748B;
      letter-spacing: 1px;
      text-transform: uppercase;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: #334155;
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: #0052CC;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: #0052CC;
      border-radius: 2px;
    }
    .nav-action-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, #0A2540 0%, #0052CC 100%);
      color: #FFFFFF;
      font-size: 0.9rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(0, 82, 204, 0.25);
    }
    .nav-action-btn:hover {
      box-shadow: 0 6px 20px rgba(0, 82, 204, 0.4);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      color: var(--primary);
      cursor: pointer;
    }

    /* Section Global Headers */
    .section-spacing {
      padding: 85px 0;
    }
    .section-spacing-sm {
      padding: 55px 0;
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: #0052CC;
      background: rgba(0, 82, 204, 0.08);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }
    .section-eyebrow.accent-light {
      background: rgba(0, 212, 178, 0.12);
      color: #008770;
      border: 1px solid rgba(0, 212, 178, 0.3);
    }
    .section-eyebrow.gold {
      background: rgba(212, 175, 55, 0.15);
      color: #B58A18;
      border: 1px solid rgba(212, 175, 55, 0.3);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero Section: 会员俱乐部黑金科技风 */
    .hero-vip-section {
      position: relative;
      background-color: #050E17;
      background-image: linear-gradient(180deg, rgba(6, 21, 36, 0.85) 0%, #0A1926 100%), url('/assets/images/064e0e04ad421700.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      color: #FFFFFF;
      padding: 100px 0 90px;
      border-bottom: 1px solid rgba(212, 175, 55, 0.2);
      overflow: hidden;
    }
    .hero-gold-glow {
      position: absolute;
      top: -150px;
      right: 10%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(212, 175, 55, 0.15) 0%, rgba(0, 212, 178, 0.05) 50%, transparent 70%);
      filter: blur(80px);
      pointer-events: none;
    }
    .hero-vip-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 50px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-vip-card {
      background: linear-gradient(145deg, rgba(25, 33, 44, 0.8) 0%, rgba(12, 19, 28, 0.95) 100%);
      border: 1px solid rgba(212, 175, 55, 0.35);
      border-radius: var(--radius-xl);
      padding: 36px;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
      position: relative;
    }
    .hero-vip-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(90deg, #D4AF37 0%, #EDD88D 100%);
      color: #0B0E14;
      font-size: 0.75rem;
      font-weight: 800;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 20px;
      box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
    }
    .hero-main-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #FFFFFF;
    }
    .hero-main-title span {
      background: linear-gradient(135deg, #FFE89E 0%, #D4AF37 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead-text {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-vip-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }
    .btn-gold-vip {
      background: linear-gradient(135deg, #ECC853 0%, #B89224 100%);
      color: #0A1118;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      box-shadow: 0 10px 25px rgba(212, 175, 55, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-gold-vip:hover {
      box-shadow: 0 14px 30px rgba(212, 175, 55, 0.5);
      transform: translateY(-2px);
    }
    .btn-outline-glow {
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(8px);
      padding: 14px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }
    .btn-outline-glow:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.5);
      transform: translateY(-2px);
    }
    .hero-tier-box {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 24px;
    }
    .tier-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 12px;
      margin-bottom: 16px;
    }
    .tier-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #E2E8F0;
    }
    .tier-value {
      font-size: 0.85rem;
      color: var(--accent);
      font-weight: 600;
    }
    .tier-perks {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }
    .tier-perk-item {
      font-size: 0.85rem;
      color: #94A3B8;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tier-perk-item i {
      color: var(--accent);
    }

    /* 1. 板块：KPI 看板 (Metrics Bar) */
    .kpi-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      margin-top: -30px;
      z-index: 10;
    }
    .kpi-card-wrapper {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      padding: 30px 40px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .kpi-item {
      display: flex;
      flex-direction: column;
      border-right: 1px solid var(--border-color);
      padding-right: 20px;
    }
    .kpi-item:last-child {
      border-right: none;
      padding-right: 0;
    }
    .kpi-number-row {
      display: flex;
      align-items: baseline;
      gap: 6px;
      margin-bottom: 4px;
    }
    .kpi-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -1px;
    }
    .kpi-unit {
      font-size: 1rem;
      font-weight: 700;
      color: #0052CC;
    }
    .kpi-label {
      font-size: 0.95rem;
      font-weight: 700;
      color: #1E293B;
      margin-bottom: 4px;
    }
    .kpi-desc {
      font-size: 0.8rem;
      color: #64748B;
      line-height: 1.5;
    }

    /* 2. 板块：品牌软硬件架构矩阵 (Brand Architecture) */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .arch-image-wrap {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .arch-image-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .arch-image-wrap:hover img {
      transform: scale(1.03);
    }
    .arch-badge-float {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(10, 37, 64, 0.9);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(0, 212, 178, 0.4);
      padding: 12px 20px;
      border-radius: var(--radius-md);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .arch-badge-float .num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent);
    }
    .arch-badge-float .txt {
      font-size: 0.75rem;
      color: #CBD5E1;
      line-height: 1.3;
    }
    .arch-specs-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .spec-item {
      display: flex;
      gap: 16px;
      background: #FFFFFF;
      padding: 18px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .spec-icon {
      width: 44px;
      height: 44px;
      background: var(--accent-subtle);
      color: #008770;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      flex-shrink: 0;
    }
    .spec-content h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .spec-content p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 3. 板块：核心优势六卡网格 (Core Advantages Grid) */
    .grid-3col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .advantage-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border-color: rgba(0, 82, 204, 0.4);
    }
    .advantage-icon-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }
    .advantage-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, rgba(0, 82, 204, 0.1) 0%, rgba(0, 212, 178, 0.15) 100%);
      color: #0052CC;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      border: 1px solid rgba(0, 82, 204, 0.15);
    }
    .data-pill {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      background: var(--accent-subtle);
      color: #007A65;
      border: 1px solid rgba(0, 212, 178, 0.25);
    }
    .advantage-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .advantage-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 板块：热门工业控制系统产品矩阵 (Featured Products Matrix) */
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
    }
    .product-media {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-media img {
      transform: scale(1.05);
    }
    .product-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 37, 64, 0.85);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .product-body {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .product-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 18px;
      line-height: 1.6;
    }
    .product-params {
      list-style: none;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .product-param-item {
      font-size: 0.825rem;
      color: #334155;
      display: flex;
      justify-content: space-between;
    }
    .product-param-item span:first-child {
      color: #64748B;
    }
    .product-param-item span:last-child {
      font-weight: 600;
    }
    .btn-product-consult {
      margin-top: auto;
      text-align: center;
      padding: 12px;
      background: #F1F5F9;
      color: var(--primary);
      font-weight: 700;
      font-size: 0.875rem;
      border-radius: var(--radius-md);
      transition: var(--transition);
    }
    .btn-product-consult:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    /* 5. 板块：深色控制算法对比区 (Dark Results Contrast) */
    .dark-contrast-section {
      background-color: #071321;
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
    }
    .dark-contrast-section .section-title {
      color: #FFFFFF;
    }
    .dark-contrast-section .section-subtitle {
      color: #94A3B8;
    }
    .contrast-table-box {
      background: rgba(15, 23, 42, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-xl);
      overflow: hidden;
      backdrop-filter: blur(10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .contrast-header-row {
      display: grid;
      grid-template-columns: 2fr 3fr 3fr;
      padding: 20px 28px;
      background: rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      font-weight: 700;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
    }
    .contrast-row {
      display: grid;
      grid-template-columns: 2fr 3fr 3fr;
      padding: 22px 28px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      align-items: center;
      transition: background 0.2s ease;
    }
    .contrast-row:hover {
      background: rgba(255, 255, 255, 0.03);
    }
    .contrast-row:last-child {
      border-bottom: none;
    }
    .contrast-col-dim {
      font-weight: 700;
      color: #E2E8F0;
      font-size: 0.95rem;
    }
    .contrast-col-legacy {
      color: #94A3B8;
      font-size: 0.9rem;
      padding-right: 20px;
    }
    .contrast-col-our {
      color: #FFFFFF;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contrast-val-badge {
      display: inline-block;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      background: rgba(0, 212, 178, 0.15);
      color: var(--accent);
      border: 1px solid rgba(0, 212, 178, 0.3);
      font-size: 0.8rem;
      font-weight: 700;
    }

    /* 6. 板块：全球应用场景与里程碑 (Milestones & Scenarios) */
    .timeline-container {
      position: relative;
      margin-top: 20px;
    }
    .timeline-container::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }
    .timeline-block {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 45px;
      position: relative;
    }
    .timeline-block:nth-child(even) {
      flex-direction: row-reverse;
    }
    .timeline-content {
      width: 45%;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 26px 30px;
      box-shadow: var(--shadow-sm);
    }
    .timeline-node {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      width: 20px;
      height: 20px;
      background: #FFFFFF;
      border: 4px solid #0052CC;
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(0, 82, 204, 0.2);
      z-index: 2;
    }
    .timeline-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: #0052CC;
      background: rgba(0, 82, 204, 0.08);
      padding: 3px 10px;
      border-radius: var(--radius-full);
      margin-bottom: 8px;
    }
    .timeline-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .timeline-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 板块：落地案例与用户实证故事 (Case Studies) */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-media {
      height: 240px;
      position: relative;
      overflow: hidden;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-metric-float {
      position: absolute;
      top: 16px;
      right: 16px;
      background: rgba(10, 37, 64, 0.92);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0, 212, 178, 0.4);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 800;
    }
    .case-body {
      padding: 28px;
      flex: 1;
    }
    .case-industry {
      font-size: 0.8rem;
      font-weight: 700;
      color: #0052CC;
      margin-bottom: 8px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .case-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .case-summary {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .case-specs {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .case-spec-item {
      font-size: 0.8rem;
      color: #475569;
      background: #F8FAFC;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    /* 8. 板块：平台保障与工业级数据统计条 (Platform Trust & Performance Metrics Bar) */
    .trust-bar-section {
      background: linear-gradient(135deg, #0A2540 0%, #061626 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .trust-stat-item {
      padding: 10px 16px;
    }
    .trust-number {
      font-size: 2.75rem;
      font-weight: 800;
      letter-spacing: -1px;
      color: #FFFFFF;
      margin-bottom: 6px;
      display: flex;
      justify-content: center;
      align-items: baseline;
      gap: 4px;
    }
    .trust-number span {
      font-size: 1.25rem;
      color: var(--accent);
    }
    .trust-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #E2E8F0;
      margin-bottom: 6px;
    }
    .trust-desc {
      font-size: 0.8rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 9. 板块：行业客户评价与权威背书 (Testimonials) */
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: normal;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .testimonial-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #0A2540;
      font-size: 1rem;
    }
    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
    }
    .author-info p {
      font-size: 0.8rem;
      color: #64748B;
    }

    /* 10. 板块：最新技术研发资讯与动态 (News & Insights) */
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .news-media {
      height: 190px;
      overflow: hidden;
    }
    .news-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-media img {
      transform: scale(1.05);
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-meta-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: #64748B;
      margin-bottom: 12px;
    }
    .news-tag {
      font-weight: 700;
      color: #0052CC;
    }
    .news-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-excerpt {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-readmore {
      margin-top: auto;
      font-size: 0.85rem;
      font-weight: 700;
      color: #0052CC;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 11. 板块：快速解答与常见问题手风琴 (FAQ Accordion) */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: start;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .faq-item summary {
      list-style: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: #0052CC;
      transition: transform 0.2s ease;
      line-height: 1;
    }
    .faq-item[open] .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      margin-top: 14px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 12. 板块：高转化工程选型表单与线索获客 (CTA Form) */
    .cta-card-wrapper {
      background: linear-gradient(135deg, #0A2540 0%, #0052CC 100%);
      border-radius: var(--radius-xl);
      padding: 50px 60px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 50px;
      align-items: center;
    }
    .cta-info h3 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-info p {
      font-size: 0.95rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-support-perks {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-perk-row {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      color: #F1F5F9;
    }
    .cta-perk-row svg {
      width: 18px;
      height: 18px;
      fill: var(--accent);
      flex-shrink: 0;
    }
    .cta-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      color: var(--text-main);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    }
    .cta-form-title {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 20px;
      text-align: center;
    }
    .form-group-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-bottom: 14px;
    }
    .form-group {
      margin-bottom: 14px;
    }
    .form-group label {
      display: block;
      font-size: 0.8rem;
      font-weight: 700;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      background: #F8FAFC;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: #0052CC;
      background: #FFFFFF;
    }
    .form-privacy-note {
      font-size: 0.725rem;
      color: #64748B;
      margin-bottom: 16px;
      line-height: 1.4;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .btn-submit-cta {
      width: 100%;
      background: linear-gradient(135deg, #0A2540 0%, #0052CC 100%);
      color: #FFFFFF;
      font-weight: 700;
      padding: 13px 20px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      font-size: 0.95rem;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0, 82, 204, 0.3);
    }
    .btn-submit-cta:hover {
      box-shadow: 0 6px 16px rgba(0, 82, 204, 0.45);
      transform: translateY(-1px);
    }

    /* Footer System */
    .site-footer {
      background: #06111D;
      color: #94A3B8;
      font-size: 0.875rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 45px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #94A3B8;
      font-size: 0.85rem;
      margin-bottom: 20px;
    }
    .footer-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-nav-link {
      color: #94A3B8;
      font-size: 0.85rem;
    }
    .footer-nav-link:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 0.85rem;
      line-height: 1.5;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: #64748B;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #CBD5E1;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-vip-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-3col {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-grid {
        grid-template-columns: 1fr;
      }
      .kpi-card-wrapper {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .kpi-item:nth-child(2) {
        border-right: none;
      }
      .trust-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .cta-card-wrapper {
        grid-template-columns: 1fr;
        padding: 40px 30px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
      }
      .nav-action-btn {
        display: none;
      }
      .hero-main-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.85rem;
      }
      .grid-3col {
        grid-template-columns: 1fr;
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
      .timeline-container::before {
        left: 20px;
      }
      .timeline-block {
        flex-direction: column !important;
        align-items: flex-start;
        margin-left: 45px;
      }
      .timeline-content {
        width: 100%;
      }
      .timeline-node {
        left: 20px;
        top: 24px;
        transform: translate(-50%, 0);
      }
      .form-group-row {
        grid-template-columns: 1fr;
      }
      .contrast-header-row, .contrast-row {
        grid-template-columns: 1.5fr 2fr 2fr;
        font-size: 0.8rem;
        padding: 14px 16px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }