/* roulang page: index */
:root {
      --primary-purple: #8B00FF;
      --primary-magenta: #E5006C;
      --accent-cyan: #00E5A0;
      --bg-deep: #0D0D12;
      --card-bg: #1A1A24;
      --card-hover-bg: #222230;
      --text-primary: #F0F0F5;
      --text-secondary: #A0A0B0;
      --border-color: #2A2A38;
      --gradient-main: linear-gradient(135deg, #8B00FF 0%, #E5006C 100%);
      --gradient-cyan: linear-gradient(135deg, #00E5A0 0%, #00B87A 100%);
      --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
      --shadow-glow: 0 8px 40px rgba(139,0,255,0.25);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 50px;
      --transition-base: 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      font-family: inherit;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
    }
    .section-padding {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
    }

    /* 自定义导航卡片面板 */
    .navbar-custom {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 960px;
      background: rgba(26, 26, 36, 0.9);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 12px 24px;
      z-index: 1000;
      box-shadow: 0 4px 30px rgba(0,0,0,0.5);
      border: 1px solid var(--border-color);
      transition: var(--transition-base);
    }
    .navbar-custom.scrolled {
      background: rgba(13, 13, 18, 0.95);
      box-shadow: 0 8px 32px rgba(0,0,0,0.7);
    }
    .navbar-brand-custom {
      font-weight: 700;
      font-size: 1.35rem;
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-icon-btn {
      background: #222230;
      border-radius: var(--radius-sm);
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--text-secondary);
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition-base);
      border: 1px solid transparent;
    }
    .nav-icon-btn i {
      font-size: 1.1rem;
    }
    .nav-icon-btn:hover {
      background: var(--gradient-main);
      color: white;
      border-color: transparent;
    }
    .btn-cta-nav {
      background: var(--gradient-main);
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      color: white;
      font-weight: 600;
      transition: var(--transition-base);
      box-shadow: 0 0 15px rgba(139,0,255,0.4);
    }
    .btn-cta-nav:hover {
      box-shadow: 0 0 25px rgba(139,0,255,0.7);
      transform: translateY(-1px);
    }
    @media (max-width: 992px) {
      .navbar-custom .nav-icon-btn span {
        display: none;
      }
      .nav-icon-btn {
        padding: 10px;
      }
    }
    @media (max-width: 768px) {
      .navbar-custom {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
      }
      .navbar-brand-custom {
        width: 100%;
        justify-content: center;
      }
    }

    /* 按钮样式 */
    .btn-primary-gradient {
      background: var(--gradient-main);
      border: none;
      border-radius: var(--radius-pill);
      padding: 14px 32px;
      color: white;
      font-weight: 600;
      transition: var(--transition-base);
      box-shadow: 0 4px 15px rgba(139,0,255,0.3);
      border: 1px solid transparent;
    }
    .btn-primary-gradient:hover {
      box-shadow: 0 0 30px rgba(139,0,255,0.6);
      transform: translateY(-2px);
      color: white;
    }
    .btn-outline-gradient {
      background: transparent;
      border: 1px solid var(--primary-purple);
      border-radius: var(--radius-pill);
      padding: 14px 32px;
      color: var(--text-primary);
      font-weight: 600;
      transition: var(--transition-base);
    }
    .btn-outline-gradient:hover {
      background: rgba(139,0,255,0.1);
      border-color: var(--primary-magenta);
      color: white;
    }
    .btn-lg-custom {
      padding: 16px 40px;
      font-size: 1.1rem;
      font-weight: 700;
    }

    /* 区块标题 */
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 16px;
      position: relative;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 40px;
      height: 4px;
      background: var(--gradient-main);
      margin-top: 8px;
    }
    .text-gradient {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* Hero区域 */
    .hero-image {
      border-radius: 24px;
      box-shadow: 0 0 40px rgba(139,0,255,0.25);
      border: 1px solid rgba(139,0,255,0.3);
    }

    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
    }
    .card-custom:hover {
      border-color: rgba(139,0,255,0.5);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
      background: var(--card-hover-bg);
    }

    /* 数据徽章 */
    .stat-badge {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.2;
    }
    .stat-unit {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-secondary);
    }

    /* 瀑布流案例 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
    }
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: var(--transition-base);
      position: relative;
    }
    .case-card:hover {
      border-color: var(--primary-purple);
      box-shadow: var(--shadow-glow);
    }
    .case-img-wrap {
      position: relative;
      overflow: hidden;
      border-radius: 12px 12px 0 0;
    }
    .case-img-wrap img {
      width: 100%;
      height: auto;
      transition: 0.4s ease;
    }
    .case-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(139,0,255,0.7) 0%, rgba(229,0,108,0.7) 100%);
      opacity: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: 0.3s ease;
    }
    .case-card:hover .case-overlay {
      opacity: 1;
    }
    .case-card:hover img {
      transform: scale(1.05);
    }
    .badge-tag {
      background: rgba(139,0,255,0.2);
      color: #d4b3ff;
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 0.75rem;
      font-weight: 500;
    }

    /* 方案对比卡片 */
    .plan-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-color);
      transition: var(--transition-base);
      height: 100%;
    }
    .plan-recommended {
      border: 2px solid var(--primary-purple);
      box-shadow: 0 0 30px rgba(139,0,255,0.3);
      position: relative;
    }
    .badge-hot {
      background: var(--accent-cyan);
      color: #0D0D12;
      font-weight: 700;
      font-size: 0.8rem;
      padding: 4px 16px;
      border-radius: 20px;
    }
    .feature-icon-check {
      color: var(--accent-cyan);
      font-weight: bold;
    }
    .feature-icon-missing {
      color: #5A5A6E;
    }

    /* FAQ手风琴 */
    .accordion-custom .accordion-item {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-custom .accordion-button {
      background: var(--card-bg);
      color: var(--text-primary);
      font-weight: 600;
      box-shadow: none;
      border-radius: var(--radius-md) !important;
      padding: 20px 24px;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: var(--card-hover-bg);
      color: white;
    }
    .accordion-custom .accordion-button::after {
      filter: brightness(0) invert(1);
    }
    .accordion-custom .accordion-body {
      background: #222230;
      color: var(--text-secondary);
      padding: 20px 24px;
    }

    /* CTA区域纹理 */
    .cta-section {
      background-color: #0D0D12;
      background-image: repeating-linear-gradient(45deg, rgba(139,0,255,0.05) 0px, rgba(139,0,255,0.05) 2px, transparent 2px, transparent 12px);
      position: relative;
    }

    /* 页脚 */
    .footer-link {
      color: var(--text-secondary);
      transition: var(--transition-base);
    }
    .footer-link:hover {
      color: var(--primary-purple);
    }
    .social-icon-circle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: #222230;
      border-radius: 50%;
      color: var(--text-secondary);
      transition: var(--transition-base);
    }
    .social-icon-circle:hover {
      background: var(--gradient-main);
      color: white;
    }

    @media (max-width: 768px) {
      h1.display-3 {
        font-size: 2.2rem;
      }
      .masonry-grid {
        column-count: 1;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }