/* roulang page: index */
:root {
      --primary: #1A3C2A;
      --primary-deep: #0F281A;
      --accent: #E85D04;
      --accent-hover: #C44D03;
      --bg-warm: #F4F1E1;
      --white: #FFFFFF;
      --text-primary: #1E2A1E;
      --text-secondary: #4A5B4A;
      --text-light: #B0BFAF;
      --border-light: rgba(26,60,42,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(26,60,42,0.08);
      --shadow-hover: 0 12px 32px rgba(26,60,42,0.15);
      --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-number: "Bebas Neue", "DIN Alternate", sans-serif;
      --nav-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-stack);
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.25s ease;
      font-weight: 600;
    }
    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--white);
      height: var(--nav-height);
      box-shadow: 0 2px 12px rgba(0,0,0,0.05);
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo i {
      font-size: 2rem;
      color: var(--accent);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 8px 0;
      font-size: 0.95rem;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-primary {
      background: var(--accent);
      color: var(--white);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      box-shadow: 0 4px 12px rgba(232,93,4,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(232,93,4,0.4);
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: var(--white);
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--primary);
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 12px 24px rgba(0,0,0,0.1);
        gap: 20px;
        align-items: flex-start;
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .header-inner .btn-primary {
        display: none;
      }
      .nav-links .btn-primary {
        display: inline-flex;
        width: 100%;
        justify-content: center;
      }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, rgba(26,60,42,0.7) 0%, rgba(0,0,0,0.85) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: var(--white);
      padding: 120px 0 100px;
      display: flex;
      align-items: center;
      min-height: 85vh;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-content p {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-visual img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      transform: rotate(1deg);
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .hero-visual {
        order: -1;
        max-width: 300px;
        margin: 0 auto;
      }
    }
    /* 通用板块 */
    .section {
      padding: 80px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      font-size: 2rem;
      color: var(--primary);
      display: inline-block;
      position: relative;
      margin-bottom: 12px;
    }
    .section-title h2::after {
      content: '';
      display: block;
      width: 40px;
      height: 3px;
      background: var(--accent);
      margin: 12px auto 0;
    }
    .section-title p {
      color: var(--text-secondary);
      font-size: 1.1rem;
    }
    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--white);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .pain-card i {
      font-size: 2.2rem;
      color: var(--accent);
    }
    /* 解决方案交错 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 60px;
    }
    .solution-row.reverse {
      flex-direction: row-reverse;
    }
    .solution-text {
      flex: 1;
    }
    .solution-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    /* 成果数据 */
    .results-bg {
      background: var(--primary);
      color: var(--white);
      border-radius: 32px;
      padding: 64px 40px;
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 32px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 3.5rem;
      color: var(--accent);
      line-height: 1;
    }
    /* 证言卡片 */
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
    }
    .testimonial-card {
      background: var(--white);
      border-left: 4px solid var(--accent);
      border-radius: var(--radius-card);
      padding: 28px;
      min-width: 300px;
      box-shadow: var(--shadow-sm);
    }
    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: transparent;
      width: 100%;
      text-align: left;
    }
    .faq-answer {
      padding: 0 28px 20px;
      display: none;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA */
    .cta-dark {
      background: var(--primary);
      text-align: center;
      padding: 80px 24px;
      border-radius: 32px;
      color: white;
    }
    /* 页脚 */
    .footer {
      background: var(--primary-deep);
      color: var(--text-light);
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .pain-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .solution-row, .solution-row.reverse {
        flex-direction: column;
      }
    }