/* roulang page: index */
:root {
      --primary: #7B2FBE;
      --secondary: #F85C1E;
      --bg-dark: #0F0F0F;
      --bg-card: #1A1A1A;
      --bg-footer: #141414;
      --text-white: #FFFFFF;
      --text-gray: #B0B0B0;
      --text-muted: #6B6B6B;
      --success: #00E5A0;
      --border-radius-lg: 12px;
      --border-radius-sm: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.4);
      --shadow-hover: 0 8px 30px rgba(123,47,190,0.25);
      --transition-fast: 0.2s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "Inter", "Roboto", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-dark);
      color: var(--text-gray);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      color: var(--text-white);
      line-height: 1.3;
    }

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

    a:hover {
      color: var(--secondary);
    }

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

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

    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--secondary);
      border: none;
      color: white;
      border-radius: var(--border-radius-sm);
      padding: 12px 28px;
      font-weight: 600;
      transition: background-color var(--transition-fast), transform var(--transition-fast);
      display: inline-block;
      text-align: center;
    }
    .btn-primary-custom:hover {
      background-color: #E04A10;
      transform: scale(1.03);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--border-radius-sm);
      padding: 12px 28px;
      font-weight: 600;
      transition: all var(--transition-fast);
    }
    .btn-outline-custom:hover {
      background-color: rgba(123,47,190,0.15);
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-glow {
      background: linear-gradient(135deg, var(--secondary), #e04510);
      border: none;
      color: white;
      border-radius: 20px;
      padding: 10px 24px;
      font-weight: 600;
      box-shadow: 0 0 12px rgba(248,92,30,0.5);
      transition: all var(--transition-fast);
    }
    .btn-glow:hover {
      background: linear-gradient(135deg, #e04510, var(--secondary));
      box-shadow: 0 0 18px rgba(248,92,30,0.7);
      color: white;
      transform: scale(1.02);
    }

    /* 导航栏 */
    .navbar {
      background: rgba(15,15,15,0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--primary);
      padding: 12px 0;
    }
    .navbar-brand {
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--primary), #a55eea);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand i {
      font-size: 2rem;
      color: var(--secondary);
      -webkit-text-fill-color: initial;
    }
    .nav-link {
      color: var(--text-gray) !important;
      font-weight: 500;
      margin: 0 8px;
      position: relative;
    }
    .nav-link.active {
      color: var(--secondary) !important;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary);
      border-radius: 2px;
    }
    .search-box {
      background: rgba(255,255,255,0.08);
      border: 1px solid transparent;
      border-radius: 20px;
      padding: 6px 16px;
      color: white;
      outline: none;
      transition: border 0.2s;
    }
    .search-box:focus {
      border-color: var(--primary);
      background: rgba(255,255,255,0.12);
    }
    .navbar-toggler {
      border-color: var(--primary);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(123, 47, 190, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* Hero区域 */
    .hero-section {
      padding: 80px 0 60px;
      background-color: var(--bg-dark);
      position: relative;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: white;
      margin-bottom: 1.5rem;
    }
    .hero-highlight {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-stats {
      display: flex;
      gap: 2rem;
      margin-top: 2rem;
      flex-wrap: wrap;
    }
    .stat-item h3 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 0.2rem;
    }
    .hero-image {
      border-radius: 16px;
      box-shadow: 0 0 30px rgba(123,47,190,0.4);
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 区块标题 */
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      color: white;
      position: relative;
      display: inline-block;
    }

    /* 亮点卡片 */
    .feature-card {
      background: #1E1E1E;
      border-radius: var(--border-radius-lg);
      padding: 24px;
      transition: all var(--transition-fast);
      box-shadow: var(--shadow-card);
      height: 100%;
    }
    .feature-card:hover {
      background: #2A2A2A;
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    /* 案例瀑布流 */
    .masonry-grid {
      column-count: 3;
      column-gap: 20px;
    }
    .case-card {
      background: #1E1E1E;
      border-radius: var(--border-radius-lg);
      overflow: hidden;
      margin-bottom: 20px;
      break-inside: avoid;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-fast);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 200px;
      object-fit: cover;
      width: 100%;
      transition: transform 0.3s;
    }
    .case-card:hover .case-img {
      transform: scale(1.03);
    }
    .case-tag {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: 20px;
      padding: 2px 12px;
      font-size: 0.8rem;
    }

    /* 方案对比表 */
    .pricing-card {
      background: #1E1E1E;
      border-radius: var(--border-radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      height: 100%;
      display: flex;
      flex-direction: column;
      border: 2px solid transparent;
    }
    .pricing-card.recommended {
      border-color: var(--primary);
      position: relative;
    }
    .badge-hot {
      background: var(--secondary);
      color: white;
      border-radius: 12px;
      padding: 4px 16px;
      font-size: 0.8rem;
      position: absolute;
      top: -12px;
      right: 20px;
    }
    .price {
      font-size: 2.5rem;
      font-weight: 800;
      color: white;
    }
    .feature-list i.fa-check {
      color: var(--success);
    }
    .feature-list i.fa-times {
      color: var(--text-muted);
    }

    /* FAQ手风琴 */
    .accordion-item {
      background: #1A1A1A;
      border: none;
      margin-bottom: 12px;
      border-radius: var(--border-radius-sm);
      overflow: hidden;
    }
    .accordion-button {
      background: #1A1A1A;
      color: white;
      font-weight: 600;
      box-shadow: none;
      border-left: 4px solid var(--primary);
      padding: 16px 20px;
    }
    .accordion-button:not(.collapsed) {
      background: #242424;
      color: white;
      box-shadow: none;
    }
    .accordion-button::after {
      background-image: none;
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      color: var(--secondary);
      transition: transform 0.2s;
    }
    .accordion-button:not(.collapsed)::after {
      transform: rotate(180deg);
    }

    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      position: relative;
      overflow: hidden;
    }
    .cta-banner::before {
      content: '';
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.1"><circle cx="20" cy="20" r="2" fill="white"/><circle cx="80" cy="70" r="3" fill="white"/></svg>');
      background-size: 60px;
    }

    /* 页脚 */
    .footer {
      background: #141414;
      border-top: 1px solid #2a2a2a;
    }
    .footer a {
      color: #9a9a9a;
    }
    .footer a:hover {
      color: var(--secondary);
    }

    @media (max-width: 992px) {
      .hero-title { font-size: 2.5rem; }
      .masonry-grid { column-count: 2; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .masonry-grid { column-count: 1; }
      .hero-stats { justify-content: center; }
      .navbar-nav { margin-top: 16px; }
    }