/* roulang page: index */
:root {
      --bg-base: #070d19;
      --bg-surface: #0c162c;
      --bg-surface-elevated: #111e3b;
      --glass-bg: rgba(16, 28, 54, 0.72);
      --glass-border: rgba(56, 189, 248, 0.18);
      --primary-color: #0284c7;
      --primary-light: #38bdf8;
      --accent-glow: #06b6d4;
      --accent-warm: #f97316;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-pill: 9999px;
      --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.75;
      letter-spacing: 0.02em;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    /* 顶部双行复合固定导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      background: rgba(7, 13, 25, 0.88);
      border-bottom: 1px solid var(--glass-border);
    }

    .nav-top-row {
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .brand-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-glow));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
    }

    .nav-search-bar {
      position: relative;
      width: 100%;
      max-width: 440px;
      margin: 0 auto;
    }

    .nav-search-bar input {
      width: 100%;
      height: 42px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-pill);
      padding: 0 46px 0 20px;
      color: var(--text-main);
      font-size: 0.88rem;
      outline: none;
      transition: all 0.3s ease;
      margin-bottom: 0;
    }

    .nav-search-bar input:focus {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--primary-light);
      box-shadow: 0 0 16px rgba(56, 189, 248, 0.3);
    }

    .nav-search-bar button {
      position: absolute;
      right: 6px;
      top: 5px;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: transparent;
      border: none;
      color: var(--text-muted);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color 0.2s ease;
    }

    .nav-search-bar button:hover {
      color: var(--primary-light);
    }

    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-glow));
      color: #fff;
      font-weight: 600;
      font-size: 0.88rem;
      padding: 9px 20px;
      border-radius: var(--radius-pill);
      box-shadow: 0 0 18px rgba(6, 182, 212, 0.35);
      white-space: nowrap;
      min-height: 42px;
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px var(--accent-glow);
      color: #fff;
    }

    .nav-sub-row {
      padding: 8px 0;
      background: rgba(12, 22, 44, 0.65);
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
    }

    .anchor-nav-list {
      display: flex;
      justify-content: center;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0 16px;
    }

    .anchor-nav-list a {
      font-size: 0.84rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 4px 6px;
      display: inline-block;
    }

    .anchor-nav-list a:hover {
      color: var(--primary-light);
    }

    /* 板块通用标准 */
    .section-block {
      padding: 90px 0;
      position: relative;
    }

    .section-bg-alt {
      background: var(--bg-surface);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-subtitle-tag {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--accent-glow);
      background: rgba(6, 182, 212, 0.1);
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(6, 182, 212, 0.25);
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .title-line {
      width: 52px;
      height: 3px;
      background: linear-gradient(90deg, var(--primary-light), transparent);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 780px;
      line-height: 1.7;
    }

    /* 拟态卡片与边框特效 */
    .glass-card {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      transition: all 0.3s ease;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(56, 189, 248, 0.45);
      box-shadow: 0 0 25px rgba(56, 189, 248, 0.25);
    }

    /* 板块 1: 首屏参数型 Hero */
    #hero-section {
      padding: 80px 0 100px;
      background: radial-gradient(circle at 50% 20%, rgba(2, 132, 199, 0.22) 0%, rgba(7, 13, 25, 0.98) 75%),
                  url('/assets/images/86b1bf98598520b7.webp') center/cover no-repeat;
      position: relative;
    }

    .hero-container {
      max-width: 1140px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: #ffffff;
      margin-bottom: 20px;
    }

    .hero-intro-lead {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .hero-specs-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-bottom: 38px;
    }

    .spec-item-box {
      background: rgba(12, 22, 44, 0.7);
      border: 1px solid rgba(56, 189, 248, 0.2);
      border-radius: var(--radius-sm);
      padding: 16px 20px;
    }

    .spec-key {
      font-size: 0.78rem;
      color: var(--text-dim);
      text-transform: uppercase;
      margin-bottom: 4px;
    }

    .spec-val {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary-light);
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      align-items: center;
    }

    .btn-glow-primary {
      background: linear-gradient(135deg, var(--primary-color), var(--accent-glow));
      color: #fff;
      font-weight: 700;
      font-size: 0.98rem;
      padding: 14px 34px;
      border-radius: var(--radius-pill);
      border: none;
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      transition: all 0.3s ease;
      min-height: 48px;
    }

    .btn-glow-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px var(--accent-glow);
      color: #fff;
    }

    .btn-outline-cyan {
      border: 1px solid var(--accent-glow);
      background: rgba(6, 182, 212, 0.08);
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.98rem;
      padding: 13px 30px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-height: 48px;
    }

    .btn-outline-cyan:hover {
      background: rgba(6, 182, 212, 0.2);
      color: #fff;
    }

    /* 板块 2: 底座架构 */
    .brand-tech-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.3);
      border-radius: var(--radius-pill);
      color: #34d399;
      font-size: 0.8rem;
      margin-top: 12px;
    }

    /* 板块 3: 痛点卡片冷暖色 */
    .pain-card {
      padding: 30px 24px;
      border-left: 3px solid #ef4444;
    }

    .pain-card:nth-child(even) {
      border-left-color: var(--accent-warm);
    }

    .pain-icon {
      font-size: 1.8rem;
      color: #ef4444;
      margin-bottom: 16px;
    }

    /* 板块 4: 水平流水线架构 */
    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
      position: relative;
    }

    .pipeline-card {
      padding: 28px 22px;
      background: var(--bg-surface-elevated);
      border: 1px dashed var(--glass-border);
      border-radius: var(--radius-md);
      position: relative;
    }

    .pipeline-badge {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
      margin-bottom: 14px;
      color: #fff;
    }

    /* 板块 5: 核心优势网格 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .advantage-card {
      padding: 32px 26px;
    }

    .advantage-card i {
      font-size: 2rem;
      color: var(--primary-light);
      margin-bottom: 18px;
    }

    /* 板块 6: 3大功能矩阵 */
    .product-cards-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
      gap: 28px;
      align-items: stretch;
    }

    .matrix-card {
      padding: 38px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .matrix-card.featured {
      transform: scale(1.03);
      border-color: var(--accent-glow);
      background: linear-gradient(180deg, rgba(16, 28, 54, 0.95), rgba(7, 13, 25, 0.95));
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.25);
    }

    .featured-ribbon {
      position: absolute;
      top: 14px;
      right: 18px;
      background: var(--accent-glow);
      color: #070d19;
      font-size: 0.72rem;
      font-weight: 800;
      padding: 2px 10px;
      border-radius: var(--radius-pill);
      text-transform: uppercase;
    }

    /* 板块 7: 深度理念对比图文 */
    .philosophy-banner {
      background: linear-gradient(135deg, rgba(12, 22, 44, 0.9), rgba(7, 13, 25, 0.95)),
                  url('/assets/images/2c85db1053726fc2.png') center/cover;
      border-radius: var(--radius-md);
      padding: 44px 36px;
      border: 1px solid var(--glass-border);
    }

    /* 板块 8: 步骤流程 */
    .step-track {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
      gap: 24px;
      position: relative;
    }

    .step-node {
      padding: 26px 20px;
      text-align: center;
      position: relative;
    }

    .step-num-circle {
      width: 56px;
      height: 56px;
      margin: 0 auto 18px;
      border-radius: 50%;
      border: 2px solid var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
      background: rgba(2, 132, 199, 0.2);
      box-shadow: 0 0 16px rgba(56, 189, 248, 0.3);
    }

    /* 板块 9: 关键成效指标 */
    .metric-strip-box {
      background: linear-gradient(90deg, rgba(2, 132, 199, 0.15), rgba(6, 182, 212, 0.05));
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 40px 24px;
    }

    .metric-num {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.1;
      background: linear-gradient(135deg, #fff, var(--primary-light));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    /* 板块 10: 客户证言卡 */
    .testimonial-card {
      padding: 34px 28px;
      position: relative;
    }

    .quote-mark {
      font-size: 3rem;
      line-height: 1;
      color: rgba(56, 189, 248, 0.2);
      position: absolute;
      top: 16px;
      right: 20px;
    }

    .author-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 24px;
    }

    .author-avatar {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      object-fit: cover;
      border: 2px solid var(--primary-light);
    }

    /* 板块 11: 适用客群 */
    .audience-card {
      padding: 26px 20px;
      text-align: center;
    }

    .audience-icon {
      width: 60px;
      height: 60px;
      margin: 0 auto 16px;
      border-radius: var(--radius-md);
      background: rgba(56, 189, 248, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      color: var(--primary-light);
    }

    /* 板块 12: 资讯前沿 */
    .insight-card {
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .insight-thumb {
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      height: 180px;
      object-fit: cover;
      width: 100%;
    }

    .meta-bar {
      display: flex;
      justify-content: space-between;
      font-size: 0.78rem;
      color: var(--text-dim);
      margin-bottom: 8px;
    }

    /* 板块 13: FAQ 折叠 */
    .faq-item {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-title {
      padding: 18px 22px;
      cursor: pointer;
      font-weight: 700;
      font-size: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-main);
    }

    .faq-content {
      padding: 0 22px 20px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
    }

    /* 预约转化卡 */
    #consult-form {
      padding: 80px 0;
      background: radial-gradient(circle at 50% 50%, rgba(2, 132, 199, 0.2) 0%, rgba(7, 13, 25, 0.9) 70%);
    }

    .consult-box {
      max-width: 860px;
      margin: 0 auto;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--primary-light);
      box-shadow: 0 0 35px rgba(2, 132, 199, 0.3);
      border-radius: var(--radius-md);
      padding: 44px 38px;
    }

    .consult-form-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 26px;
    }

    .form-input {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--glass-border);
      color: var(--text-main);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      outline: none;
      width: 100%;
      height: 48px;
      font-size: 0.92rem;
    }

    .form-input:focus {
      border-color: var(--primary-light);
      box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
      background: rgba(255, 255, 255, 0.08);
    }

    /* 站点页脚 */
    .site-footer {
      background: #040810;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 60px 0 30px;
      font-size: 0.88rem;
      color: var(--text-dim);
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: var(--primary-light);
    }

    .footer-bottom-bar {
      margin-top: 45px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 14px;
      font-size: 0.8rem;
    }

    /* 移动端响应优化 */
    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 1.95rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .nav-search-bar {
        margin: 10px 0;
      }
      .matrix-card.featured {
        transform: scale(1);
      }
      .consult-box {
        padding: 26px 18px;
      }
    }