/* roulang page: index */
:root {
      --primary: #E64A19;
      --primary-dark: #D84315;
      --primary-light: rgba(230, 74, 25, 0.08);
      --secondary: #1C1C1E;
      --bg: #FAFAF5;
      --surface: #FFFFFF;
      --surface-alt: #F7F7F2;
      --text: #3A3A3C;
      --text-heading: #1C1C1E;
      --text-light: #6B6B6F;
      --accent-gold: #C8A96E;
      --success: #2E7D32;
      --alert: #C62828;
      --border-light: rgba(0, 0, 0, 0.04);
      --border-medium: rgba(0, 0, 0, 0.08);
      --shadow-sm: 0 2px 12px rgba(28, 28, 30, 0.06);
      --shadow-md: 0 8px 28px rgba(28, 28, 30, 0.12);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-capsule: 40px;
      --font-title: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Text", -apple-system, sans-serif;
      --transition: 0.2s ease;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3 {
      font-family: var(--font-title);
      color: var(--text-heading);
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 8px;
    }

    p {
      margin-bottom: 16px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition);
    }

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-body);
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition);
    }

    /* 悬浮胶囊导航 */
    .capsule-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 950px;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(0,0,0,0.06);
      border-radius: var(--radius-capsule);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--secondary);
      letter-spacing: -0.3px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 18px;
      transform: rotate(3deg);
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      padding: 6px 12px;
      border-radius: 30px;
      transition: all var(--transition);
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 6px;
      height: 6px;
      background: var(--primary);
      border-radius: 50%;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      padding: 8px;
      background: transparent;
    }

    .hamburger span {
      width: 22px;
      height: 2px;
      background: var(--secondary);
      border-radius: 2px;
      transition: var(--transition);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 80px;
      left: 16px;
      right: 16px;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(24px);
      border-radius: 28px;
      padding: 24px;
      flex-direction: column;
      gap: 20px;
      box-shadow: var(--shadow-md);
      z-index: 999;
    }

    .mobile-menu a {
      font-size: 18px;
      font-weight: 500;
      padding: 12px 16px;
    }

    /* 按钮系统 */
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 2px 8px rgba(230,74,25,0.2);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 4px 16px rgba(230,74,25,0.35);
      transform: scale(1.02);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--secondary);
      color: var(--secondary);
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 600;
    }

    .btn-outline:hover {
      background: var(--secondary);
      color: white;
    }

    .btn-large {
      padding: 16px 40px;
      font-size: 18px;
      border-radius: var(--radius-btn);
    }

    .text-link {
      color: var(--primary);
      font-weight: 500;
      border-bottom: 1px solid var(--primary);
      padding-bottom: 2px;
    }

    .text-link:hover {
      border-bottom-width: 2px;
      color: var(--primary-dark);
    }

    /* 区块间距 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 1024px) {
      section { padding: 80px 0; }
      h1 { font-size: 40px; }
      h2 { font-size: 32px; }
    }

    @media (max-width: 640px) {
      section { padding: 60px 0; }
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      .capsule-nav { padding: 8px 20px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
    }

    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      min-height: 380px;
      box-shadow: var(--shadow-md);
    }

    .hero-text h1 {
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 20px;
      align-items: center;
      flex-wrap: wrap;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .pain-card {
      background: var(--surface-alt);
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }

    .pain-icon {
      width: 44px;
      height: 44px;
      background: white;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    /* 解决方案非对称栅格 */
    .solution-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }

    .solution-main {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid var(--border-light);
    }

    .solution-main:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }

    .solution-side {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .solution-card {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid var(--border-light);
    }

    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }

    .card-icon {
      color: var(--accent-gold);
      font-size: 28px;
      margin-bottom: 16px;
    }

    /* 成果数字 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      background: var(--surface);
      border-radius: 24px;
      padding: 48px;
      box-shadow: var(--shadow-sm);
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
    }

    .stat-label {
      color: var(--text-light);
      font-size: 14px;
      margin-top: 8px;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--surface-alt);
      border-radius: var(--radius-card);
      padding: 28px;
      border-left: 4px solid var(--accent-gold);
    }

    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ddd;
      margin-bottom: 16px;
    }

    .stars {
      color: var(--success);
      margin: 8px 0;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-medium);
      padding: 20px 0;
    }

    .faq-question {
      font-size: 18px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
      cursor: pointer;
      color: var(--text-heading);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text);
      padding-left: 32px;
      margin-top: 8px;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
    }

    /* 最终CTA */
    .cta-dark {
      background: var(--secondary);
      color: white;
      text-align: center;
      border-radius: 32px;
      padding: 80px 24px;
    }

    .cta-dark h2 {
      color: white;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      color: rgba(250, 250, 245, 0.9);
    }

    footer {
      background: var(--secondary);
      padding: 60px 0 30px;
      color: white;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .solution-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonial-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 640px) {
      .stats-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }