/* roulang page: index */
:root {
      --primary-deep: #1E2A3A;
      --accent-cyan: #00C2BA;
      --bg-light: #F8FAFC;
      --card-white: #FFFFFF;
      --gray-section: #F1F5F9;
      --text-main: #1E2A3A;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-search: 24px;
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      font-weight: 400;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-padding {
      padding: 80px 0;
    }
    @media (max-width: 640px) {
      .section-padding {
        padding: 48px 0;
      }
    }
    /* 导航栏 */
    .top-bar {
      background-color: var(--primary-deep);
      padding: 0;
      box-shadow: 0 2px 8px rgba(0,0,0,0.05);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .top-bar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      padding: 10px 20px;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 0.5px;
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 1.8rem;
    }
    .logo span {
      color: var(--accent-cyan);
    }
    .search-box {
      flex: 1;
      max-width: 380px;
      margin: 0 30px;
      position: relative;
    }
    .search-box input {
      width: 100%;
      background: rgba(255,255,255,0.15);
      border: 1px solid transparent;
      border-radius: var(--radius-search);
      padding: 10px 20px 10px 44px;
      color: white;
      font-size: 0.9rem;
      transition: var(--transition);
      outline: none;
    }
    .search-box input::placeholder {
      color: rgba(255,255,255,0.7);
      font-weight: 300;
    }
    .search-box input:focus {
      background: white;
      color: var(--primary-deep);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,194,186,0.3);
    }
    .search-box i {
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--accent-cyan);
      font-size: 1rem;
    }
    .nav-menu {
      display: flex;
      gap: 24px;
      align-items: center;
    }
    .nav-menu a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-menu a:hover {
      color: white;
      border-bottom-color: var(--accent-cyan);
    }
    .hamburger {
      display: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .search-box {
        max-width: 240px;
        margin: 0 15px;
      }
      .nav-menu {
        gap: 15px;
      }
    }
    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        background: var(--primary-deep);
        padding: 15px 0;
        gap: 10px;
      }
      .nav-menu.active {
        display: flex;
      }
      .search-box {
        order: 2;
        max-width: 100%;
        margin: 10px 0 0 0;
      }
    }
    /* Hero */
    #hero {
      background: linear-gradient(135deg, #1E2A3A 0%, #0F172A 100%);
      color: white;
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1;
    }
    .hero-text h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
      color: white;
    }
    .hero-text p {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 30px;
      font-weight: 300;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-cyan);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      box-shadow: 0 6px 16px rgba(0,194,186,0.25);
    }
    .btn-primary:hover {
      background: #00e0d4;
      color: #0A1929;
      box-shadow: 0 10px 24px rgba(0,194,186,0.4);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }
    .hero-visual {
      flex: 1;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      padding: 20px;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .score-mock {
      display: flex;
      align-items: center;
      justify-content: space-around;
      background: rgba(0,0,0,0.3);
      border-radius: 16px;
      padding: 20px;
    }
    .team {
      text-align: center;
    }
    .team img {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: white;
      margin: 0 auto 10px;
      object-fit: cover;
    }
    .score {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-text h1 {
        font-size: 2rem;
      }
    }
    /* 痛点卡片 */
    .card-grid {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .pain-card {
      background: var(--gray-section);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      flex: 1;
      min-width: 240px;
      border: 1px solid var(--border-light);
    }
    .pain-card i {
      font-size: 2rem;
      color: var(--primary-deep);
      margin-bottom: 15px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    /* 解决方案卡片 */
    .solution-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      flex: 1;
      min-width: 220px;
      border: 1px solid var(--border-light);
    }
    .solution-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .solution-card i {
      font-size: 2.4rem;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }
    .solution-link {
      color: var(--accent-cyan);
      font-weight: 600;
      display: inline-block;
      margin-top: 12px;
      border-bottom: 2px solid var(--accent-cyan);
    }
    /* 成果数据 */
    .stats-row {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
      text-align: center;
      justify-content: space-between;
    }
    .stat-item h3 {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary-deep);
    }
    .stat-item p {
      color: var(--text-secondary);
    }
    /* 证言轮播 */
    .testimonial-slide {
      background: white;
      border-radius: 20px;
      padding: 40px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .testimonial-slide img {
      width: 70px;
      height: 70px;
      border-radius: 50%;
      margin: 0 auto 20px;
      object-fit: cover;
    }
    .orbit-bullets button {
      background: var(--accent-cyan);
    }
    /* FAQ */
    .accordion-title {
      font-weight: 600;
      font-size: 1.1rem;
      border-radius: 8px;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    /* CTA */
    .cta-block {
      background: var(--accent-cyan);
      border-radius: 24px;
      padding: 60px;
      text-align: center;
      color: var(--primary-deep);
    }
    .footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.8);
      padding: 50px 0 20px;
    }
    .footer a {
      color: rgba(255,255,255,0.7);
    }
    .footer a:hover {
      color: var(--accent-cyan);
    }