/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --primary-light: #2D8B9C;
      --accent: #F4A261;
      --accent-hover: #E08D4A;
      --bg: #FAFCFD;
      --card-bg: #FFFFFF;
      --text: #2D3748;
      --text-light: #718096;
      --border: #E2E8F0;
      --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
      --shadow-card-hover: 0 20px 25px -5px rgba(26,95,122,0.1), 0 10px 10px -5px rgba(26,95,122,0.04);
      --shadow-testimonial: 0 25px 50px -12px rgba(0,80,140,0.15);
      --radius-card: 16px;
      --radius-button: 30px;
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 12px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }
    h1, h2, h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.3;
    }
    h1 {
      font-size: 48px;
      line-height: 56px;
    }
    h2 {
      font-size: 36px;
      line-height: 44px;
      margin-bottom: 24px;
    }
    h3 {
      font-size: 24px;
      line-height: 32px;
    }
    p {
      font-size: 16px;
      color: var(--text-light);
      max-width: 680px;
    }
    .text-small {
      font-size: 14px;
      color: var(--text-light);
    }
    @media (max-width: 768px) {
      h1 {
        font-size: 36px;
        line-height: 42px;
      }
      h2 {
        font-size: 28px;
        line-height: 36px;
      }
      h3 {
        font-size: 22px;
        line-height: 30px;
      }
      p {
        font-size: 15px;
        line-height: 1.65;
      }
    }

    /* 导航栏 - 悬浮胶囊 */
    .main-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 1100px;
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(226,232,240,0.5);
      border-radius: 40px;
      padding: 12px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 50;
      transition: background 0.3s;
    }
    .nav-logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-light);
      font-size: 15px;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-cta {
      background: var(--accent);
      color: #fff !important;
      padding: 10px 20px;
      border-radius: var(--radius-button);
      font-weight: 600;
      transition: var(--transition);
    }
    .nav-cta:hover {
      background: var(--accent-hover);
      box-shadow: 0 8px 15px rgba(244,162,97,0.3);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 22px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: var(--transition);
    }
    @media (max-width: 768px) {
      .main-nav {
        top: 8px;
        width: calc(100% - 16px);
        padding: 10px 20px;
      }
      .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        justify-content: center;
        gap: 32px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 40;
      }
      .nav-links.active {
        transform: translateX(0);
      }
      .hamburger {
        display: flex;
        z-index: 50;
      }
    }

    /* 区块通用 */
    .section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      .section {
        padding: 60px 0;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 100px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-left {
      flex: 1;
    }
    .hero-right {
      flex: 1;
    }
    .hero-right img {
      width: 100%;
      border-radius: 24px;
      background: linear-gradient(135deg, rgba(26,95,122,0.1), rgba(45,139,156,0.05));
    }
    .hero-title {
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .hero-cta {
      display: inline-block;
      background: var(--accent);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-size: 16px;
      transition: var(--transition);
    }
    .hero-cta:hover {
      background: var(--accent-hover);
      box-shadow: 0 12px 20px rgba(244,162,97,0.3);
    }
    .trust-badges {
      display: flex;
      gap: 32px;
      margin-top: 32px;
    }
    .trust-badge {
      text-align: left;
    }
    .trust-badge .number {
      font-weight: 700;
      font-size: 28px;
      color: var(--accent);
      display: block;
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--text-light);
      font-size: 24px;
    }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-8px); }
      60% { transform: translateX(-50%) translateY(-4px); }
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero-left, .hero-right {
        width: 100%;
      }
      .trust-badges {
        justify-content: center;
      }
      .hero-sub {
        max-width: 100%;
      }
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: 5fr 3fr 3fr;
      gap: 24px;
    }
    .pain-card {
      background: transparent;
      padding: 32px 24px;
      border-radius: 0;
      position: relative;
      transition: var(--transition);
    }
    .pain-card:first-child {
      background: #F0F6FA;
      border-radius: var(--radius-card);
      padding-left: 28px;
    }
    .pain-card::before {
      content: '';
      position: absolute;
      left: 0;
      top: 20px;
      bottom: 20px;
      width: 4px;
      background: var(--primary);
      border-radius: 2px;
    }
    .pain-card:first-child::before {
      left: 20px;
    }
    .pain-icon {
      font-size: 28px;
      color: var(--primary-light);
      margin-bottom: 16px;
    }
    .pain-title {
      font-weight: 700;
      font-size: 20px;
      margin-bottom: 12px;
    }
    @media (max-width: 1024px) {
      .pain-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 解决方案 */
    .solution-grid {
      display: flex;
      gap: 60px;
      align-items: center;
    }
    .solution-left {
      flex: 1;
    }
    .solution-right {
      flex: 1;
    }
    .solution-point {
      position: relative;
      padding-left: 48px;
      margin-bottom: 40px;
    }
    .solution-point::before {
      content: '';
      position: absolute;
      left: 20px;
      top: 40px;
      bottom: -40px;
      width: 2px;
      border-left: 2px dashed #CBD5E0;
    }
    .solution-point:last-child::before {
      display: none;
    }
    .solution-icon {
      width: 40px;
      height: 40px;
      background: rgba(45,139,156,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      position: absolute;
      left: 0;
      top: 0;
      color: var(--primary-light);
      font-size: 20px;
    }
    @media (max-width: 768px) {
      .solution-grid {
        flex-direction: column;
      }
    }

    /* 成果统计 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: #F4F8FC;
      padding: 40px 24px;
      border-radius: var(--radius-card);
      text-align: center;
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-card-hover);
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    @media (max-width: 640px) {
      .stats-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 证言 */
    .testimonial-card {
      max-width: 800px;
      margin: 0 auto;
      background: #fff;
      padding: 48px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-testimonial);
      position: relative;
    }
    .testimonial-quote {
      font-size: 18px;
      line-height: 1.8;
      font-style: italic;
      margin-bottom: 24px;
      position: relative;
      z-index: 2;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .testimonial-author img {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      border: 3px solid #fff;
      box-shadow: 0 4px 10px rgba(0,0,0,0.08);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 0;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-icon {
      font-size: 20px;
      transition: transform 0.4s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-light);
      padding-bottom: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-bottom: 20px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #1A5F7A, #2D8B9C);
      text-align: center;
      color: #fff;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
      flex-wrap: wrap;
    }
    .cta-input {
      padding: 14px 24px;
      border-radius: 30px;
      border: 1px solid transparent;
      width: 400px;
      max-width: 100%;
      font-size: 16px;
    }
    .cta-btn {
      background: #fff;
      color: var(--primary);
      border: none;
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .cta-btn:hover {
      background: #f0f0f0;
    }

    /* 页脚 */
    .footer {
      background: #1A202C;
      color: #A0AEC0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer-logo {
      font-size: 24px;
      font-weight: 700;
      color: #fff;
    }
    .footer-desc {
      margin: 16px 0;
      font-size: 14px;
    }
    .social-icons i {
      font-size: 20px;
      margin-right: 16px;
      color: #A0AEC0;
      transition: var(--transition);
    }
    .social-icons i:hover {
      color: #fff;
    }
    .footer-col h4 {
      color: #fff;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-col a {
      display: block;
      color: #A0AEC0;
      font-size: 14px;
      margin-bottom: 10px;
    }
    .footer-col a:hover {
      color: #fff;
    }
    .copyright {
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      text-align: center;
      font-size: 14px;
      margin-top: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 480px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }