/* roulang page: index */
:root {
      --bg-main: #0B0F19;
      --bg-card: #141B2D;
      --bg-card-alt: #1F293D;
      --bg-darker: #070A10;
      --primary-grad: linear-gradient(135deg, #6366F1 0%, #A855F7 50%, #EC4899 100%);
      --accent-grad: linear-gradient(135deg, #06B6D4 0%, #10B981 100%);
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --cyan-highlight: #06B6D4;
      --green-highlight: #10B981;
      --border-soft: rgba(255, 255, 255, 0.08);
      --border-accent: rgba(99, 102, 241, 0.35);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-card: 0 14px 34px -10px rgba(0, 0, 0, 0.6);
      --shadow-glow: 0 0 25px rgba(168, 85, 247, 0.35);
      --container-max: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-main);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

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

    /* 顶部元数据栏 + 沉浸式双行导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(11, 15, 25, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-soft);
    }

    .top-meta-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-dim);
      padding: 6px 0;
    }

    .top-meta-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .meta-tagline {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .status-dot {
      display: inline-block;
      width: 7px;
      height: 7px;
      background: var(--green-highlight);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--green-highlight);
    }

    .meta-right {
      display: flex;
      gap: 18px;
    }

    .main-nav-bar {
      padding: 14px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-grad);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      box-shadow: var(--shadow-glow);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      list-style: none;
    }

    .nav-links a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-grad);
      transition: width 0.3s;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-grad);
      color: #fff;
      padding: 9px 20px;
      border-radius: var(--radius-full);
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.15);
      cursor: pointer;
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 22px rgba(168, 85, 247, 0.55);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: #fff;
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 全局 Section 样式 */
    section {
      padding: 85px 0;
      position: relative;
    }

    .section-alt {
      background: #0E1424;
      border-top: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
    }

    .section-dark {
      background: var(--bg-darker);
      border-top: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px auto;
    }

    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      background: rgba(99, 102, 241, 0.12);
      border: 1px solid rgba(99, 102, 241, 0.3);
      border-radius: var(--radius-full);
      color: #A5B4FC;
      font-size: 13px;
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.25;
      color: #FFFFFF;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 首屏大图旗舰展示 (#hero) */
    #hero {
      position: relative;
      padding: 40px 0 90px 0;
      background: radial-gradient(circle at 50% 10%, rgba(99, 102, 241, 0.15) 0%, transparent 65%),
                  url('/assets/images/e872d7b715c075d5.webp') center/cover no-repeat;
      background-blend-mode: overlay;
    }

    .hero-card-stage {
      background: rgba(20, 27, 45, 0.75);
      border: 1px solid var(--border-soft);
      border-radius: 24px;
      padding: 55px;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: 0 25px 60px -15px rgba(0,0,0,0.8);
      position: relative;
      overflow: hidden;
    }

    .hero-card-stage::before {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.18) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-inner-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-content p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.75;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }

    .btn-main {
      padding: 13px 28px;
      border-radius: var(--radius-full);
      background: var(--primary-grad);
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
    }

    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(168, 85, 247, 0.55);
    }

    .btn-outline {
      padding: 13px 28px;
      border-radius: var(--radius-full);
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-soft);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.3);
    }

    .hero-media-wrapper {
      position: relative;
    }

    .hero-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-accent);
      box-shadow: 0 16px 40px rgba(0,0,0,0.5);
    }

    .hero-data-float-badge {
      position: absolute;
      bottom: -15px;
      left: -20px;
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid var(--cyan-highlight);
      border-radius: var(--radius-md);
      padding: 14px 20px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.6);
      backdrop-filter: blur(10px);
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .badge-icon-core {
      width: 40px;
      height: 40px;
      background: rgba(6, 182, 212, 0.15);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-highlight);
      font-weight: 800;
    }

    .badge-text-val {
      font-size: 18px;
      font-weight: 800;
      color: #fff;
      line-height: 1.2;
    }

    .badge-text-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 旗舰店系列导航条叠加大图下部 */
    .hero-series-strip {
      margin-top: 36px;
      padding-top: 26px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .series-item {
      display: flex;
      align-items: center;
      gap: 12px;
      background: rgba(255, 255, 255, 0.03);
      padding: 12px 16px;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.05);
      transition: all 0.25s;
    }

    .series-item:hover {
      background: rgba(99, 102, 241, 0.1);
      border-color: rgba(99, 102, 241, 0.3);
      transform: translateY(-2px);
    }

    .series-num {
      font-weight: 900;
      font-size: 14px;
      color: var(--cyan-highlight);
    }

    .series-name {
      font-size: 13px;
      font-weight: 600;
      color: #E2E8F0;
    }

    /* 2. 合集目录与产品矩阵 (#catalog) */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .catalog-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 28px;
      transition: all 0.3s;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .catalog-card:hover {
      border-color: rgba(168, 85, 247, 0.5);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }

    .catalog-tag-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }

    .catalog-badge {
      background: rgba(16, 185, 129, 0.15);
      color: var(--green-highlight);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }

    .catalog-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .catalog-body {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 22px;
    }

    .catalog-meta-list {
      list-style: none;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
      color: var(--text-dim);
    }

    .catalog-meta-list li {
      display: flex;
      justify-content: space-between;
    }

    .catalog-meta-list span.val {
      color: #CBD5E1;
      font-weight: 500;
    }

    /* 3. 痛点与破局对比区 (#challenges) */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .compare-box {
      border-radius: var(--radius-lg);
      padding: 36px;
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      position: relative;
    }

    .compare-box.bad {
      border-top: 4px solid #EF4444;
    }

    .compare-box.good {
      border-top: 4px solid var(--green-highlight);
      background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, var(--bg-card) 100%);
    }

    .compare-box h3 {
      font-size: 22px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .compare-list li {
      position: relative;
      padding-left: 28px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .compare-box.bad li::before {
      content: '✕';
      position: absolute;
      left: 0;
      color: #EF4444;
      font-weight: bold;
    }

    .compare-box.good li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--green-highlight);
      font-weight: bold;
    }

    /* 4. 品牌全栈产品与解决方案 (#solutions) */
    .solution-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .solution-img-holder {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-card);
    }

    .solution-info h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
    }

    .solution-info p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .feature-points-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .fp-card {
      background: rgba(255, 255, 255, 0.03);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .fp-card h4 {
      font-size: 15px;
      color: #A5B4FC;
      margin-bottom: 6px;
    }

    .fp-card p {
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 0;
      line-height: 1.5;
    }

    /* 5. 核心优势六维全息卡片区 (#advantage) */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .adv-card::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-grad);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 36px rgba(0,0,0,0.5);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .adv-card:hover::after {
      opacity: 1;
    }

    .adv-icon-pill {
      width: 48px;
      height: 48px;
      background: rgba(99, 102, 241, 0.15);
      border: 1px solid rgba(99, 102, 241, 0.3);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 20px;
      color: #818CF8;
    }

    .adv-card h3 {
      font-size: 19px;
      margin-bottom: 12px;
      color: #fff;
    }

    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 6. 精品热门研发展厅 (#showcase) */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .showcase-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-soft);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s;
    }

    .showcase-card:hover {
      transform: translateY(-6px);
      border-color: var(--border-accent);
      box-shadow: var(--shadow-card);
    }

    .showcase-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.05);
    }

    .showcase-info {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .showcase-info h3 {
      font-size: 19px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .showcase-info p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.65;
    }

    .showcase-specs {
      display: flex;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .spec-item {
      font-size: 12px;
      background: rgba(255, 255, 255, 0.04);
      padding: 4px 10px;
      border-radius: 6px;
      color: var(--cyan-highlight);
    }

    /* 7. 深色案例与底层渲染理念 (#engine) */
    .engine-deep-box {
      background: #080C14;
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 24px;
      padding: 48px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .code-console-window {
      background: #0D1117;
      border: 1px solid #30363D;
      border-radius: 12px;
      padding: 20px;
      font-family: "Fira Code", Consolas, monospace;
      font-size: 13px;
      color: #58A6FF;
      box-shadow: inset 0 2px 8px rgba(0,0,0,0.6);
      line-height: 1.8;
      overflow-x: auto;
    }

    .console-header-dots {
      display: flex;
      gap: 6px;
      margin-bottom: 14px;
    }

    .dot {
      width: 10px;
      height: 10px;border-radius: 50%;
    }
    .dot-r { background: #FF5F56; }
    .dot-y { background: #FFBD2E; }
    .dot-g { background: #27C93F; }

    /* 8. 研发合作方法与标准化交付流程 (#process) */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      position: relative;
      transition: all 0.3s;
    }

    .step-item:hover {
      border-color: rgba(99, 102, 241, 0.4);
      transform: translateY(-4px);
    }

    .step-num-pill {
      font-size: 20px;
      font-weight: 900;
      color: var(--cyan-highlight);
      margin-bottom: 12px;
      display: inline-block;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 核心成果与关键运营数据条 (#metrics) */
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .metric-data-card {
      background: linear-gradient(180deg, rgba(20, 27, 45, 0.9) 0%, rgba(15, 23, 42, 0.9) 100%);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
    }

    .metric-number {
      font-size: 42px;
      font-weight: 900;
      background: var(--primary-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 15px;
      color: #E2E8F0;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .metric-sub {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 10. 客户证言与行业生态评价 (#testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
      font-style: italic;
    }

    .testi-stars {
      color: #F59E0B;
      font-size: 13px;
      margin-bottom: 12px;
      letter-spacing: 2px;
    }

    .testi-client-info {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 16px;
    }

    .client-avatar-stub {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-grad);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 15px;
    }

    .client-name {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
    }

    .client-role {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 11. 垂直领域受众与适用业务矩阵 (#audiences) */
    .audiences-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .audience-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      transition: all 0.3s;
    }

    .audience-card:hover {
      border-color: rgba(6, 182, 212, 0.4);
      background: var(--bg-card-alt);
    }

    .audience-tag {
      font-size: 12px;
      color: var(--cyan-highlight);
      font-weight: 700;
      margin-bottom: 10px;
    }

    .audience-card h3 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 10px;
    }

    .audience-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 12. 前沿技术资讯与研发洞见 (#insights) */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .insight-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .insight-img-box {
      height: 180px;
      overflow: hidden;
    }

    .insight-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }

    .insight-card:hover .insight-img-box img {
      transform: scale(1.05);
    }

    .insight-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
      justify-content: space-between;
    }

    .insight-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: var(--text-dim);
      margin-bottom: 10px;
    }

    .insight-content h3 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .insight-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .insight-anchor-btn {
      font-size: 13px;
      color: var(--cyan-highlight);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 13. 常见问题 FAQ 手风琴 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s;
    }

    .faq-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-header h3 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
    }

    .faq-toggle-icon {
      font-size: 18px;
      color: var(--text-dim);
      transition: transform 0.3s;
    }

    .faq-content {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 16px;
    }

    .faq-item.active {
      border-color: rgba(99, 102, 241, 0.4);
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--cyan-highlight);
    }

    .faq-item.active .faq-content {
      display: block;
    }

    /* 14. 转化表单与立项评估 (#contact-cta) */
    .contact-cta-wrapper {
      background: linear-gradient(135deg, rgba(31, 41, 61, 0.8) 0%, rgba(15, 23, 42, 0.95) 100%);
      border: 1px solid var(--border-accent);
      border-radius: 24px;
      padding: 50px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      position: relative;
      overflow: hidden;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      color: #CBD5E1;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      background: rgba(11, 15, 25, 0.8);
      border: 1px solid var(--border-soft);
      border-radius: 8px;
      padding: 12px 16px;
      font-size: 14px;
      color: #fff;
      outline: none;
      transition: border-color 0.25s;
    }

    .form-control:focus {
      border-color: #818CF8;
    }

    .submit-btn {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-full);
      background: var(--primary-grad);
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
      transition: transform 0.25s;
    }

    .submit-btn:hover {
      transform: translateY(-2px);
    }

    /* 页脚设计 */
    footer.site-footer {
      background: #060911;
      border-top: 1px solid var(--border-soft);
      padding: 70px 0 30px 0;
      color: var(--text-dim);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
    }

    .footer-links-list a:hover {
      color: #fff;
    }

    .footer-contact-items {
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
    }

    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 移动端与自适应断点 */
    @media (max-width: 1024px) {
      .catalog-grid,
      .advantage-grid,
      .showcase-grid,
      .testimonials-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .audiences-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-meta-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #0B0F19;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-soft);
      }
      .nav-links.open {
        display: flex;
      }
      .hero-inner-grid,
      .solution-block,
      .engine-deep-box,
      .compare-container,
      .contact-cta-wrapper {
        grid-template-columns: 1fr;
      }
      .catalog-grid,
      .advantage-grid,
      .showcase-grid,
      .testimonials-grid,
      .insights-grid,
      .audiences-grid,
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .hero-series-strip {
        grid-template-columns: 1fr 1fr;
      }
      .hero-card-stage {
        padding: 28px 20px;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 25px;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }