/* roulang page: index */
:root {
      --primary: #E83A14;
      --primary-dark: #c5300f;
      --secondary: #1A1A2E;
      --accent: #00B4A6;
      --bg-warm: #F5F0EB;
      --white: #ffffff;
      --text-heading: #1A1A2E;
      --text-body: #3A3A4A;
      --text-muted: #6B6B7B;
      --border-soft: #E0D9D2;
      --shadow-card: 0 10px 25px -8px rgba(232,58,20,0.08), 0 4px 10px -2px rgba(0,0,0,0.02);
      --shadow-card-hover: 0 20px 35px -12px rgba(232,58,20,0.15), 0 8px 16px -4px rgba(0,0,0,0.06);
      --radius-sm: 12px;
      --radius-md: 20px;
      --radius-pill: 40px;
      --font-sans: 'Inter', 'MiSans', 'PingFang SC', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --transition-smooth: 0.25s ease-out;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, input {
      font-family: inherit;
    }

    /* 导航栏 - 毛玻璃暖白半透 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(245, 240, 235, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
      z-index: 1000;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.3);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 24px;
      color: var(--secondary);
      letter-spacing: 1px;
    }

    .logo i {
      color: var(--primary);
      font-size: 28px;
      transform: rotate(10deg);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
      font-weight: 500;
      color: var(--text-body);
    }

    .nav-links a {
      transition: color 0.2s;
      font-size: 16px;
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      color: var(--text-muted);
      font-size: 20px;
      cursor: pointer;
      transition: color 0.2s;
    }

    .search-icon:hover {
      color: var(--primary);
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
      box-shadow: 0 6px 18px rgba(232,58,20,0.25);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
    }

    .btn-primary:hover {
      background: #ff4d2a;
      box-shadow: 0 10px 24px rgba(232,58,20,0.4);
      transform: translateY(-1px);
    }

    .btn-ghost {
      background: transparent;
      border: 2px solid var(--secondary);
      color: var(--secondary);
      padding: 10px 28px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      cursor: pointer;
      transition: 0.25s ease-out;
    }

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

    .hamburger {
      display: none;
      font-size: 28px;
      cursor: pointer;
      color: var(--secondary);
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(245,240,235,0.98);
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 40px;
      font-size: 24px;
      font-weight: 600;
      transform: translateX(100%);
      transition: transform 0.4s ease;
      z-index: 999;
    }

    .mobile-menu.open {
      transform: translateX(0);
    }

    .mobile-menu a {
      color: var(--secondary);
    }

    /* Hero 区域 */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-content {
      flex: 1;
    }

    .hero-content h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-heading);
      margin-bottom: 20px;
    }

    .hero-highlight {
      color: var(--primary);
      position: relative;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--secondary);
      margin-bottom: 32px;
      max-width: 450px;
    }

    .hero-image {
      flex: 1;
      background-image: url('/assets/images/backpic/hero-bg.webp');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-md);
      min-height: 400px;
      box-shadow: var(--shadow-card);
      position: relative;
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-sub {
      color: var(--text-muted);
      margin-bottom: 48px;
      font-size: 18px;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }

    .pain-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
      flex: 1 1 280px;
      box-shadow: var(--shadow-card);
      border-left: 6px solid var(--primary);
      transition: var(--transition-smooth);
    }

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

    /* 解决方案 “1+2” 布局 */
    .solutions-layout {
      display: flex;
      flex-direction: column;
      gap: 28px;
    }

    .main-solution-card {
      background: linear-gradient(135deg, #F5F0EB 0%, #FFE9E1 100%);
      border-radius: var(--radius-md);
      padding: 48px;
      display: flex;
      align-items: center;
      gap: 40px;
      box-shadow: var(--shadow-card);
    }

    .main-solution-card img {
      width: 200px;
      border-radius: var(--radius-sm);
    }

    .side-solutions {
      display: flex;
      gap: 28px;
    }

    .side-card {
      background: white;
      flex: 1;
      padding: 28px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-card);
      border-left: 6px solid var(--accent);
    }

    /* 成果数字 */
    .results-grid {
      display: flex;
      gap: 36px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .stat-item {
      text-align: center;
      background: white;
      padding: 32px 48px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
    }

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

    /* 证言卡片倾斜 */
    .testimonial-grid {
      display: flex;
      gap: 36px;
      flex-wrap: wrap;
    }

    .testimonial-card {
      background: white;
      padding: 36px;
      border-radius: var(--radius-md);
      transform: rotate(1deg);
      box-shadow: var(--shadow-card);
      flex: 1 1 280px;
      position: relative;
    }

    .testimonial-card::before {
      content: "“";
      font-size: 72px;
      color: rgba(232,58,20,0.2);
      position: absolute;
      top: -10px;
      left: 16px;
    }

    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 3px solid var(--primary);
      margin-right: 12px;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      border-left: 5px solid var(--primary);
    }

    .faq-answer {
      padding: 0 28px 20px;
      color: var(--text-muted);
      display: none;
      background: #fafaf8;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA 区域 */
    .cta-section {
      background: var(--secondary);
      color: white;
      text-align: center;
      border-radius: var(--radius-md);
      padding: 64px 32px;
    }

    .footer {
      background: #1A1A2E;
      color: #ccc;
      padding: 48px 0 24px;
    }

    .footer-grid {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }

    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
        text-align: center;
      }
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 32px;
      }
      .side-solutions {
        flex-direction: column;
      }
    }