/* roulang page: index */
:root {
      --primary: #1A1A2E;
      --accent: #E94560;
      --bg-light: #F8F9FA;
      --bg-dark-block: #16213E;
      --text-main: #2D3436;
      --text-muted: #636E72;
      --border-light: rgba(0,0,0,0.06);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 30px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: 0.3s ease;
      --header-brand-height: 60px;
      --header-channel-height: 44px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: #ffffff;
      color: var(--text-main);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      padding-top: calc(var(--header-brand-height) + var(--header-channel-height));
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 导航 */
    .xpj-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      transition: all 0.2s;
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-brand-height);
      padding: 0 20px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-icon {
      font-size: 28px;
      color: var(--primary);
      display: flex;
      align-items: center;
    }
    .logo-text {
      font-weight: 700;
      font-size: 22px;
      letter-spacing: 0.5px;
      color: var(--primary);
    }
    .logo-text span {
      color: var(--accent);
      font-weight: 800;
    }
    .brand-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-icon {
      font-size: 18px;
      color: var(--text-muted);
      cursor: pointer;
    }
    .btn-header {
      background: var(--accent);
      color: white;
      border-radius: 20px;
      padding: 8px 20px;
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
    }
    .btn-header:hover {
      background: #C81E45;
      color: white;
    }
    .channel-bar {
      background: #F8F9FA;
      height: var(--header-channel-height);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 28px;
      border-top: 1px solid rgba(0,0,0,0.03);
      font-size: 14px;
      font-weight: 500;
      letter-spacing: 0.5px;
      color: var(--text-main);
      padding: 0 20px;
      white-space: nowrap;
    }
    .channel-item {
      position: relative;
      cursor: pointer;
      padding: 4px 0;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .channel-item i {
      font-size: 6px;
      color: var(--accent);
      opacity: 0.7;
    }
    .channel-item:hover {
      color: var(--accent);
    }
    .channel-item::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s ease;
    }
    .channel-item:hover::after {
      width: 100%;
    }
    .scrolled .channel-bar {
      display: none;
    }
    .scrolled .xpj-header {
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }
    /* 移动汉堡 */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .menu-toggle span {
      width: 22px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    @media (max-width: 768px) {
      .channel-bar {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .brand-actions .search-icon,
      .brand-actions .btn-header {
        display: none;
      }
      body {
        padding-top: var(--header-brand-height);
      }
      .mobile-menu-active .channel-bar {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-brand-height);
        left: 0;
        width: 100%;
        background: white;
        height: auto;
        padding: 20px;
        gap: 16px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.08);
      }
    }
    /* 区块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--primary);
    }
    .section-sub {
      color: var(--text-muted);
      margin-top: 12px;
      font-size: 18px;
    }
    /* Hero */
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    }
    .hero-left {
      flex: 1;
      max-width: 520px;
    }
    .hero-left h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: var(--primary);
    }
    .hero-left h1 span {
      color: var(--accent);
      text-decoration: underline;
      text-decoration-color: var(--accent);
      text-underline-offset: 8px;
    }
    .hero-desc {
      margin: 24px 0 32px;
      color: var(--text-muted);
      font-size: 18px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      border: none;
      transition: var(--transition);
      box-shadow: 0 8px 20px rgba(233,69,96,0.2);
    }
    .btn-primary:hover {
      background: #C81E45;
      transform: scale(1.03);
      box-shadow: 0 12px 28px rgba(233,69,96,0.35);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      position: relative;
    }
    .abstract-geo {
      width: 280px;
      height: 280px;
      position: relative;
      animation: rotateSlow 12s infinite alternate ease-in-out;
    }
    .geo-shape {
      position: absolute;
      border: 2px solid var(--primary);
      border-radius: 20px;
      background: rgba(26,26,46,0.02);
      opacity: 0.7;
    }
    .geo1 { width: 180px; height: 180px; top: 20px; left: 50px; border-color: var(--accent); animation: drift1 8s infinite; }
    .geo2 { width: 140px; height: 140px; bottom: 20px; right: 40px; border-color: var(--primary); }
    @keyframes rotateSlow { 0% { transform: rotate(0deg); } 100% { transform: rotate(8deg); } }
    @keyframes drift1 { 0% { transform: translate(0,0); } 50% { transform: translate(8px,-8px); } 100% { transform: translate(0,0); } }

    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero-left h1 {
        font-size: 28px;
      }
      .abstract-geo {
        width: 200px;
        height: 200px;
      }
    }
    /* 痛点 */
    .pain-list {
      display: flex;
      flex-direction: column;
      gap: 32px;
      background: #f4f6f8;
      border-radius: 24px;
      padding: 40px;
    }
    .pain-item {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .pain-num {
      font-size: 48px;
      font-weight: 800;
      color: var(--accent);
      opacity: 0.8;
      min-width: 70px;
    }
    /* 解决方案错落栅格 */
    .solution-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }
    .card-solution {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .card-solution:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-solution i {
      font-size: 40px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    @media (max-width: 768px) {
      .solution-grid {
        grid-template-columns: 1fr;
      }
      .pain-item {
        flex-direction: column;
        text-align: center;
      }
    }
    /* 数据深色块 */
    .data-block {
      background: var(--bg-dark-block);
      color: white;
      border-radius: 24px;
      display: flex;
      justify-content: space-around;
      padding: 60px 20px;
      text-align: center;
    }
    .data-num {
      font-size: 48px;
      font-weight: 800;
      color: var(--accent);
    }
    /* 证言横向滚动 */
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
    }
    .testimonial-card {
      min-width: 280px;
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      scroll-snap-align: start;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ddd;
      margin-bottom: 16px;
      overflow: hidden;
    }
    /* FAQ */
    .accordion-item {
      border-bottom: 1px dashed #DFE6E9;
      padding: 18px 0;
      cursor: pointer;
    }
    .accordion-title {
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      background: #1A1A2E;
      color: #ccc;
      padding: 60px 20px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .data-block {
        flex-direction: column;
        gap: 28px;
      }
    }