/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --accent: #06B6D4;
      --accent-green: #10B981;
      --dark-bg: #0B0F19;
      --dark-card: #151D30;
      --light-bg: #F8FAFC;
      --white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border: #E2E8F0;
      --border-dark: #1E293B;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-glow: 0 10px 25px -5px rgba(79, 70, 229, 0.3);
      --radius-sm: 0.5rem;
      --radius-md: 1rem;
      --radius-lg: 1.5rem;
      --radius-full: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      color: var(--text-main);
      background-color: var(--light-bg);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* Top Bar */
    .top-bar {
      background: #0A0E1A;
      color: var(--text-light);
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 0.5rem 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.75rem;
    }
    .top-bar-links {
      display: flex;
      gap: 1.25rem;
      align-items: center;
    }
    .top-bar-links a:hover {
      color: var(--accent);
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-main);
    }
    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--white);
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(79, 70, 229, 0.35);
    }
    .brand-text {
      background: linear-gradient(135deg, #1E1B4B 0%, #4F46E5 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 2rem;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-muted);
      font-size: 0.95rem;
      padding: 0.5rem 0;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.75rem 1.625rem;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
      min-height: 46px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #4338CA 100%);
      color: var(--white);
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(79, 70, 229, 0.45);
      background: linear-gradient(135deg, #4338CA 0%, #3730A3 100%);
    }
    .btn-accent {
      background: linear-gradient(135deg, var(--accent) 0%, #0891B2 100%);
      color: var(--white);
      box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
    }
    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(6, 182, 212, 0.45);
    }
    .btn-outline {
      border-color: var(--border);
      color: var(--text-main);
      background: var(--white);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(79, 70, 229, 0.04);
    }
    .btn-sm {
      padding: 0.45rem 1.1rem;
      font-size: 0.875rem;
      min-height: 38px;
    }

    /* Badges */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.375rem;
      padding: 0.3rem 0.85rem;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 600;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      border: 1px solid rgba(79, 70, 229, 0.15);
    }
    .badge-accent {
      background: rgba(6, 182, 212, 0.1);
      color: #0891B2;
      border-color: rgba(6, 182, 212, 0.2);
    }
    .badge-dark {
      background: rgba(255, 255, 255, 0.1);
      color: #38BDF8;
      border-color: rgba(255, 255, 255, 0.15);
    }

    /* Section Foundations */
    .section {
      padding: 5rem 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .section-dark {
      background-color: var(--dark-bg);
      color: var(--white);
    }
    .section-header {
      max-width: 780px;
      margin: 0 auto 3.5rem;
      text-align: center;
    }
    .section-header h2 {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin: 0.85rem 0 1rem;
      color: var(--text-main);
    }
    .section-dark .section-header h2 {
      color: var(--white);
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: var(--text-light);
    }

    /* Cards */
    .card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      overflow: hidden;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .card-dark {
      background: var(--dark-card);
      border-color: var(--border-dark);
      color: var(--white);
    }
    .card-dark:hover {
      border-color: rgba(79, 70, 229, 0.5);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    }

    /* Hero Section - Help/Knowledge Hub Style */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #EEF2FF 0%, #F8FAFC 100%);
      padding: 4.5rem 0 5rem;
      border-bottom: 1px solid var(--border);
    }
    .hero-container {
      max-width: 960px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1.25;
      color: var(--text-main);
      margin: 1.25rem 0 1.25rem;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.85;
      margin-bottom: 2.25rem;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-search-wrapper {
      max-width: 680px;
      margin: 0 auto 1.5rem;
      position: relative;
    }
    .hero-search-box {
      display: flex;
      background: var(--white);
      border-radius: var(--radius-full);
      padding: 0.5rem 0.5rem 0.5rem 1.5rem;
      box-shadow: 0 12px 35px rgba(79, 70, 229, 0.12);
      border: 2px solid rgba(79, 70, 229, 0.2);
      transition: var(--transition);
    }
    .hero-search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 12px 40px rgba(79, 70, 229, 0.22);
    }
    .hero-search-input {
      flex: 1;
      border: none;
      outline: none;
      font-size: 1rem;
      color: var(--text-main);
      background: transparent;
    }
    .hero-search-input::placeholder {
      color: #94A3B8;
    }
    .hero-search-btn {
      background: linear-gradient(135deg, var(--primary), #4338CA);
      color: var(--white);
      border: none;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-full);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .hero-search-btn:hover {
      background: #3730A3;
    }
    .hero-hot-chips {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.5rem;
      align-items: center;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .chip {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--border);
      padding: 0.25rem 0.85rem;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      color: #334155;
      cursor: pointer;
      transition: var(--transition);
    }
    .chip:hover {
      background: var(--white);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }

    /* Section 2: Two-column feed layout (Left Feed + Right Hot List) */
    .two-col-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 2.5rem;
    }
    .feed-item {
      padding: 1.75rem;
      margin-bottom: 1.25rem;
      border-radius: var(--radius-md);
      background: var(--white);
      border: 1px solid var(--border);
      transition: var(--transition);
    }
    .feed-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .feed-meta {
      display: flex;
      gap: 0.75rem;
      align-items: center;
      margin-bottom: 0.75rem;
      font-size: 0.8125rem;
      color: var(--text-light);
    }
    .feed-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
      line-height: 1.4;
    }
    .feed-desc {
      color: var(--text-muted);
      font-size: 0.9375rem;
      line-height: 1.7;
    }
    .sidebar-block {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      padding: 1.75rem;
      margin-bottom: 1.5rem;
    }
    .sidebar-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1.25rem;
      padding-bottom: 0.75rem;
      border-bottom: 2px solid #F1F5F9;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .rank-list {
      list-style: none;
    }
    .rank-item {
      display: flex;
      gap: 0.85rem;
      align-items: flex-start;
      padding: 0.75rem 0;
      border-bottom: 1px dashed #F1F5F9;
    }
    .rank-item:last-child {
      border-bottom: none;
    }
    .rank-num {
      width: 24px;
      height: 24px;
      border-radius: 6px;
      background: #F1F5F9;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      font-weight: 700;
      flex-shrink: 0;
    }
    .rank-item:nth-child(1) .rank-num { background: #FEE2E2; color: #DC2626; }
    .rank-item:nth-child(2) .rank-num { background: #FFEDD5; color: #EA580C; }
    .rank-item:nth-child(3) .rank-num { background: #FEF3C7; color: #D97706; }
    .rank-text {
      font-size: 0.875rem;
      color: #334155;
      line-height: 1.5;
    }
    .rank-text:hover {
      color: var(--primary);
    }

    /* Section 3: Topic Band (专题条) */
    .topics-band {
      background: linear-gradient(135deg, #1E1B4B 0%, #0F172A 100%);
      color: var(--white);
      border-radius: var(--radius-lg);
      padding: 3rem;
      position: relative;
      overflow: hidden;
    }
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .topic-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      transition: var(--transition);
    }
    .topic-card:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-3px);
      border-color: var(--accent);
    }
    .topic-icon {
      font-size: 1.75rem;
      margin-bottom: 1rem;
      color: var(--accent);
    }
    .topic-h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 0.5rem;
    }
    .topic-p {
      font-size: 0.875rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* Section 4: System Architecture (左右非对称) */
    .arch-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .arch-specs {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.25rem;
      margin-top: 2rem;
    }
    .arch-spec-box {
      padding: 1.25rem;
      background: #F8FAFC;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
    }
    .arch-spec-val {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 0.25rem;
    }
    .arch-spec-lbl {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .arch-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
    }
    .arch-media img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* Section 5: Advantages Matrix (6 Cards) */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .adv-card {
      padding: 2.25rem;
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      transition: var(--transition);
    }
    .adv-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .adv-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 1.25rem;
      font-weight: 800;
    }
    .adv-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .adv-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 6: Products Matrix (3 Big Rounded Cards) */
    .prod-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .prod-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 2.25rem;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .prod-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .prod-header {
      margin-bottom: 1.25rem;
    }
    .prod-header h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      margin: 0.5rem 0 0.5rem;
    }
    .prod-desc {
      color: var(--text-muted);
      font-size: 0.9375rem;
      line-height: 1.7;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .prod-stack-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 1.75rem;
    }
    .prod-stack-tags span {
      background: #F1F5F9;
      color: #334155;
      padding: 0.2rem 0.6rem;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      font-weight: 600;
    }

    /* Section 7: Security & Transport Architecture (Deep Dark) */
    .sec-flow-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 3rem;
    }
    .sec-flow-step {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
      position: relative;
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 900;
      color: rgba(255, 255, 255, 0.08);
      position: absolute;
      top: 1.25rem;
      right: 1.5rem;
      line-height: 1;
    }
    .sec-flow-step h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 0.85rem;
    }
    .sec-flow-step p {
      font-size: 0.9375rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* Section 8: Scenarios (4 Columns) */
    .scen-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .scen-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 1.75rem;
      transition: var(--transition);
    }
    .scen-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .scen-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.75rem;
    }
    .scen-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.65rem;
    }
    .scen-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 9: Case Benchmark (Big Focus Card) */
    .case-container {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1.1fr 1fr;
    }
    .case-body {
      padding: 3rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-body h3 {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin: 1rem 0 1rem;
    }
    .case-body p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 1.75rem;
    }
    .case-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.25rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--border);
    }
    .case-stat-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
    }
    .case-stat-lbl {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .case-cover {
      position: relative;
      min-height: 380px;
      background: #0B0F19;
    }
    .case-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* Section 10: Metrics Banner (4 Cols borderless) */
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-item {
      padding: 1rem;
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1.15;
      margin-bottom: 0.5rem;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .metric-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.35rem;
    }
    .metric-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* Section 11: Testimonials Wall */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .testi-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-quote {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 1.5rem;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4F46E5, #06B6D4);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--white);
      font-weight: 700;
      font-size: 0.95rem;
    }
    .testi-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-info span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* Section 12: FAQ Accordion */
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      margin-bottom: 1rem;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item[open] {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 1.25rem 1.5rem;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: '+';
      font-size: 1.35rem;
      font-weight: 500;
      color: var(--primary);
      transition: transform 0.2s ease;
    }
    .faq-item[open] .faq-summary::after {
      content: '−';
    }
    .faq-content {
      padding: 0 1.5rem 1.5rem;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
      padding-top: 1rem;
    }

    /* Section 13: Final CTA Section */
    .cta-card {
      background: linear-gradient(135deg, #312E81 0%, #0F172A 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: var(--white);
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(15, 23, 42, 0.25);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .cta-text h2 {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin: 0.75rem 0 1rem;
      color: var(--white);
    }
    .cta-text p {
      font-size: 1.05rem;
      color: var(--text-light);
      line-height: 1.8;
      margin-bottom: 2rem;
    }
    .cta-form-box {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 2rem;
    }
    .form-group {
      margin-bottom: 1rem;
    }
    .form-label {
      display: block;
      font-size: 0.8125rem;
      color: #E2E8F0;
      margin-bottom: 0.35rem;
      font-weight: 500;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 0.75rem 1rem;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(15, 23, 42, 0.6);
      color: var(--white);
      font-size: 0.9375rem;
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--accent);
      background: rgba(15, 23, 42, 0.85);
    }
    .form-select option {
      background: #0F172A;
      color: #FFF;
    }
    .form-btn {
      width: 100%;
      margin-top: 0.5rem;
    }

    /* Footer */
    .site-footer {
      background: #070A12;
      color: #94A3B8;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
      padding-top: 4.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 3rem;
      padding-bottom: 3.5rem;
    }
    .footer-brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--white);
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .footer-brand-desc {
      line-height: 1.8;
      font-size: 0.875rem;
      color: #64748B;
      margin-bottom: 1.5rem;
    }
    .footer-h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-links a:hover {
      color: var(--white);
    }
    .footer-contact-item {
      display: flex;
      gap: 0.5rem;
      align-items: center;
      margin-bottom: 0.75rem;
      color: #94A3B8;
    }
    .footer-bottom {
      border-top: 1px solid #151D30;
      padding: 1.75rem 0;
      font-size: 0.8125rem;
      color: #64748B;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.35rem; }
      .two-col-grid { grid-template-columns: 1fr; }
      .topics-grid { grid-template-columns: repeat(2, 1fr); }
      .arch-grid { grid-template-columns: 1fr; }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .prod-grid { grid-template-columns: 1fr; }
      .sec-flow-grid { grid-template-columns: 1fr; }
      .scen-grid { grid-template-columns: repeat(2, 1fr); }
      .case-container { grid-template-columns: 1fr; }
      .metrics-row { grid-template-columns: repeat(2, 1fr); gap: 2.5rem; }
      .testi-grid { grid-template-columns: 1fr; }
      .cta-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-h1 { font-size: 1.95rem; }
      .hero-search-box { flex-direction: column; border-radius: var(--radius-md); padding: 0.75rem; }
      .hero-search-btn { width: 100%; margin-top: 0.5rem; }
      .adv-grid { grid-template-columns: 1fr; }
      .scen-grid { grid-template-columns: 1fr; }
      .metrics-row { grid-template-columns: 1fr; }
      .topics-grid { grid-template-columns: 1fr; }
      .cta-card { padding: 2rem 1.5rem; }
      .footer-grid { grid-template-columns: 1fr; }
      .section { padding: 3.5rem 0; }
    }