/* roulang page: index */
:root {
      --primary-deep: #0B1D2E;
      --secondary-green: #1A7F5A;
      --secondary-dark-green: #0F5C3E;
      --accent-gold: #F4A261;
      --bg-warm: #FAFBF7;
      --card-white: #FFFFFF;
      --text-main: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-on-dark: #FFFFFF;
      --border-light: #D1D5DB;
      --shadow-card: 0 8px 30px rgba(11,29,46,0.06);
      --shadow-hover: 0 16px 40px rgba(11,29,46,0.12);
      --radius-card: 20px;
      --radius-btn: 12px;
      --radius-input: 8px;
      --radius-badge: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", "SF Pro Display", system-ui, sans-serif;
      --transition-smooth: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      padding-bottom: 70px; /* 为移动端底部Tab留空间 */
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 标题全局 */
    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--primary-deep);
    }
    h2 {
      font-size: 2rem;
      margin-bottom: 1.5rem;
      letter-spacing: -0.5px;
    }
    .text-accent {
      color: var(--accent-gold);
    }
    .text-green {
      color: var(--secondary-green);
    }

    /* 导航 */
    #header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 15px rgba(0,0,0,0.02);
      padding: 12px 0;
      transition: var(--transition-smooth);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: -0.5px;
      color: var(--primary-deep);
      text-decoration: none;
      display: flex;
      align-items: baseline;
      gap: 5px;
    }
    .logo small {
      font-size: 0.7rem;
      font-weight: 400;
      color: var(--text-secondary);
      letter-spacing: 0.2px;
    }
    .desktop-nav {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .desktop-nav a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
      padding: 6px 0;
      border-bottom: 2px solid transparent;
    }
    .desktop-nav a:hover {
      color: var(--accent-gold);
      border-bottom-color: var(--accent-gold);
    }
    .btn-ghost {
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
      background: transparent;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }
    .btn-ghost:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
    }

    /* 移动端底部Tab */
    .mobile-bottom-tab {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #FFFFFF;
      box-shadow: 0 -4px 15px rgba(0,0,0,0.04);
      z-index: 99;
      padding: 8px 0;
      justify-content: space-around;
      border-top: 1px solid rgba(0,0,0,0.03);
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-decoration: none;
      color: var(--text-secondary);
      font-size: 10px;
      font-weight: 500;
      transition: var(--transition-smooth);
    }
    .tab-item i {
      font-size: 1.3rem;
      margin-bottom: 2px;
    }
    .tab-item.active {
      color: var(--primary-deep);
      position: relative;
    }
    .tab-item.active::after {
      content: '';
      position: absolute;
      bottom: -8px;
      width: 20px;
      height: 3px;
      background: var(--accent-gold);
      border-radius: 2px;
    }

    /* 按钮系统 */
    .btn-primary {
      background: linear-gradient(135deg, var(--secondary-green), var(--secondary-dark-green));
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition-smooth);
      box-shadow: 0 6px 18px rgba(26,127,90,0.2);
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #1f8b64, #0b4a32);
      box-shadow: 0 10px 24px rgba(26,127,90,0.35);
      transform: translateY(-1px);
      color: white;
    }
    .btn-gold {
      background: var(--accent-gold);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      border: none;
      font-size: 1.1rem;
      box-shadow: 0 8px 22px rgba(244,162,97,0.25);
      transition: var(--transition-smooth);
    }
    .btn-gold:hover {
      background: #f5b37a;
      box-shadow: 0 12px 28px rgba(244,162,97,0.4);
      color: var(--primary-deep);
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, #fafbf7 0%, #f0f4ef 100%);
      padding: 4rem 0 3rem;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-left h1 {
      font-size: 2.8rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
    }
    .hero-left .subtitle {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
    }
    .badge-group {
      display: flex;
      gap: 12px;
      margin-top: 2rem;
      flex-wrap: wrap;
    }
    .badge-capsule {
      background: var(--accent-gold);
      color: white;
      padding: 8px 18px;
      border-radius: var(--radius-badge);
      font-weight: 600;
      font-size: 0.85rem;
      letter-spacing: 0.3px;
    }
    .hero-right {
      flex: 1;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 32px;
      min-height: 320px;
      position: relative;
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .hero-right::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(135deg, rgba(26,127,90,0.25), rgba(11,29,46,0.2));
    }

    /* 卡片通用 */
    .card-custom {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      padding: 1.8rem;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    /* 痛点卡片特殊左边框 */
    .pain-card {
      background: #F4F6F9;
      border-radius: var(--radius-card);
      padding: 1.6rem;
      transition: var(--transition-smooth);
      border-left: 4px solid transparent;
    }
    .pain-card:hover {
      border-left-color: var(--accent-gold);
      background: white;
      box-shadow: var(--shadow-card);
    }

    /* 解决方案配图 */
    .solution-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      border-radius: 16px 16px 0 0;
      margin: -1.8rem -1.8rem 1.5rem -1.8rem;
    }

    /* 成果深色区 */
    .dark-bg-section {
      background-color: var(--primary-deep);
      color: white;
      padding: 4rem 0;
      border-radius: 0;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.1;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      border-left: 5px solid var(--secondary-green);
      box-shadow: var(--shadow-card);
    }

    /* FAQ手风琴定制 */
    .accordion-title {
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--primary-deep);
      border-radius: 10px;
    }
    .accordion-item.is-active .accordion-title {
      background: #f0f3f8;
    }

    /* CTA渐变区 */
    .cta-gradient {
      background: linear-gradient(135deg, #1A7F5A 0%, #0B1D2E 100%);
      position: relative;
      overflow: hidden;
    }
    .cta-gradient::before {
      content: '';
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.08) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.7);
      padding: 3rem 0 2rem;
    }
    footer a {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
    }
    footer a:hover {
      color: var(--accent-gold);
    }

    @media (max-width: 1024px) {
      .hero-content {
        flex-direction: column;
      }
      .hero-right {
        min-height: 240px;
        width: 100%;
      }
    }

    @media (max-width: 640px) {
      .desktop-nav {
        display: none;
      }
      .mobile-bottom-tab {
        display: flex;
      }
      body {
        padding-bottom: 80px;
      }
      h1 {
        font-size: 2.2rem;
      }
      .hero-left .badge-group {
        justify-content: center;
      }
    }