/* roulang page: index */
:root {
      --coral: #FF6B6B;
      --coral-light: #FFF0F0;
      --purple-deep: #2E1A47;
      --purple-mid: #4A3B6B;
      --bg: #FAFAF8;
      --white: #FFFFFF;
      --gray-50: #F9F9F9;
      --gray-100: #F3F3F2;
      --gray-200: #E8E8E6;
      --gray-800: #2D2D2D;
      --gray-600: #4A4A4A;
      --gray-500: #6B6B6B;
      --radius-card: 24px;
      --radius-btn: 50px;
      --radius-input: 16px;
      --shadow-sm: 0 10px 30px -10px rgba(0,0,0,0.05);
      --shadow-md: 0 20px 40px -10px rgba(0,0,0,0.08);
      --shadow-glow: 0 20px 40px -10px rgba(255,107,107,0.2);
      --transition: all 0.25s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", sans-serif;
      --gradient-brand: linear-gradient(135deg, #FF6B6B 0%, #2E1A47 100%);
      --gradient-text: linear-gradient(135deg, #FF6B6B, #4A3B6B);
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg);
      color: var(--gray-600);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      transition: var(--transition);
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 卡片化导航面板 */
    .nav-panel {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 1200px;
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255,107,107,0.15);
      border-radius: 32px;
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 100;
      box-shadow: 0 12px 40px -20px rgba(46,26,71,0.15);
      transition: box-shadow 0.3s ease, transform 0.3s ease;
    }

    .nav-panel.scrolled {
      box-shadow: 0 20px 40px -15px rgba(46,26,71,0.25);
      background: rgba(255,255,255,0.9);
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.6rem;
      letter-spacing: -0.5px;
      color: var(--purple-deep);
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--gradient-brand);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.5rem;
      font-weight: 700;
      box-shadow: 0 8px 16px -6px rgba(255,107,107,0.4);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-link-card {
      padding: 10px 18px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--gray-600);
      background: transparent;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-link-card i {
      font-size: 1rem;
      color: var(--coral);
    }

    .nav-link-card:hover {
      background: var(--coral-light);
      color: var(--purple-deep);
      transform: translateY(-1px);
    }

    .cta-nav-btn {
      background: var(--gradient-brand);
      color: white;
      padding: 12px 28px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 0.95rem;
      box-shadow: 0 8px 20px -8px rgba(255,107,107,0.5);
      transition: var(--transition);
      border: none;
      white-space: nowrap;
    }

    .cta-nav-btn:hover {
      filter: brightness(1.1);
      transform: scale(1.03);
      box-shadow: 0 12px 28px -6px rgba(255,107,107,0.7);
    }

    /* Hero */
    .hero {
      padding: 160px 0 120px;
      background: radial-gradient(circle at 20% 30%, rgba(255,107,107,0.04) 0%, transparent 50%);
      display: flex;
      align-items: center;
      min-height: 90vh;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: clamp(2.5rem, 5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.2;
      color: var(--purple-deep);
      margin-bottom: 24px;
      background: linear-gradient(135deg, #4A3B6B 0%, #2E1A47 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-content p {
      font-size: 1.2rem;
      color: var(--gray-500);
      margin-bottom: 40px;
      max-width: 480px;
    }

    .pulse-btn {
      background: var(--gradient-brand);
      color: white;
      padding: 18px 42px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 1.1rem;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 0 0 0 rgba(255,107,107,0.5);
      animation: pulse 2s infinite;
      border: none;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,107,107,0.6); }
      70% { box-shadow: 0 0 0 18px rgba(255,107,107,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,107,107,0); }
    }

    .hero-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 40px;
      height: 420px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(255,107,107,0.1);
    }

    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(255,107,107,0.25), rgba(46,26,71,0.3));
      mix-blend-mode: multiply;
    }

    /* sections */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--purple-deep);
    }

    .section-sub {
      font-size: 1.1rem;
      color: var(--gray-500);
      max-width: 600px;
      margin: 0 auto 60px;
    }

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

    .coral-highlight {
      background: linear-gradient(135deg, var(--coral), #ff8a7a);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 700;
    }

    /* 解决方案错落栅格 */
    .solutions-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 1fr;
      gap: 28px;
      margin-top: 40px;
    }

    .solution-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 40px 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.02);
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

    .solution-card.wide {
      grid-column: span 1;
    }

    .solution-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-glow);
      background: rgba(255,240,240,0.4);
      border-color: rgba(255,107,107,0.2);
    }

    .card-icon {
      font-size: 2.2rem;
      margin-bottom: 24px;
      background: linear-gradient(135deg, var(--coral), var(--purple-mid));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .solution-card h3 {
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--purple-deep);
      margin-bottom: 12px;
    }

    /* 数据徽章 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      margin-top: 40px;
    }

    .stat-badge {
      background: white;
      border-radius: 28px;
      padding: 32px 20px;
      text-align: center;
      border: 1px solid rgba(74,59,107,0.15);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-badge:hover {
      border-color: var(--coral);
      box-shadow: 0 20px 30px -12px rgba(255,107,107,0.15);
    }

    .stat-number {
      font-size: 3.2rem;
      font-weight: 900;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.1;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 40px;
    }

    .testimonial-card {
      background: #F3F2F5;
      border-radius: 32px;
      padding: 36px;
      display: flex;
      gap: 24px;
      align-items: flex-start;
      border: 1px solid rgba(0,0,0,0.04);
      position: relative;
    }

    .testimonial-card::before {
      content: "“";
      font-size: 5rem;
      position: absolute;
      top: -15px;
      left: 20px;
      color: rgba(255,107,107,0.25);
      font-weight: 700;
      line-height: 1;
    }

    .avatar {
      width: 70px;
      height: 70px;
      border-radius: 20px;
      object-fit: cover;
      background: #ddd;
    }

    .quote-text {
      font-size: 1.05rem;
      color: var(--gray-800);
    }

    /* FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: white;
      border-radius: 20px;
      border: 1px solid #eee;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 24px 32px;
      font-weight: 700;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--purple-deep);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s;
      padding: 0 32px;
      color: var(--gray-600);
      background: #fff9f9;
    }

    .faq-item.active {
      border-left: 5px solid var(--coral);
      border-color: rgba(255,107,107,0.4);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 32px 24px;
    }

    /* CTA 条 */
    .cta-strip {
      background: var(--gradient-brand);
      border-radius: 40px;
      padding: 70px 40px;
      text-align: center;
      color: white;
      margin: 60px 0 40px;
    }

    .btn-light {
      background: white;
      color: var(--purple-deep);
      padding: 18px 48px;
      border-radius: 50px;
      font-weight: 700;
      display: inline-block;
      margin-top: 28px;
    }

    /* 页脚 */
    .footer {
      background: #2E1A47;
      color: #ddd;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .solutions-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-panel {
        border-radius: 24px;
        padding: 10px 20px;
      }
      .nav-links {
        display: none;
      }
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 2rem;
      }
    }