/* roulang page: index */
:root {
      --bg-main: #0F1117;
      --bg-card: #181B24;
      --bg-elevated: #222634;
      --primary: #00F5A0;
      --primary-hover: #00d68b;
      --primary-light: rgba(0, 245, 160, 0.12);
      --accent: #7B61FF;
      --accent-hover: #6a4ff5;
      --accent-light: rgba(123, 97, 255, 0.12);
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-subtle: #4B5563;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-hover: rgba(0, 245, 160, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
      --shadow-glow: 0 0 25px rgba(0, 245, 160, 0.18);
      --font-mono: Consolas, "SF Mono", Monaco, "Courier New", monospace;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }
    a { color: var(--primary); text-decoration: none; transition: all 0.25s ease; }
    a:hover { color: var(--primary-hover); }
    img { max-width: 100%; height: auto; display: block; }
    .site-container { max-width: 1260px; margin: 0 auto; padding: 0 20px; }
    
    /* 顶部导航 */
    .site-header {
      background: rgba(15, 17, 23, 0.92);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .header-top {
      padding: 14px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .brand-logo i { color: var(--primary); font-size: 1.4rem; }
    .header-actions { display: flex; align-items: center; gap: 14px; }
    .nav-tabs-bar {
      display: flex;
      gap: 10px;
      padding: 10px 0;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
    }
    .nav-tabs-bar::-webkit-scrollbar { display: none; }
    .pill-link {
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-muted);
      font-size: 0.88rem;
      border: 1px solid transparent;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .pill-link:hover, .pill-link.active {
      color: var(--primary);
      background: var(--primary-light);
      border-color: rgba(0, 245, 160, 0.3);
    }
    
    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }
    .btn-primary {
      background: var(--primary);
      color: #05140E;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      color: #05140E;
      box-shadow: var(--shadow-glow);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.03);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      color: #FFFFFF;
    }

    /* 板块排版与背景分隔 */
    .app-section {
      padding: 85px 0;
      position: relative;
    }
    .bg-alt { background-color: #12151E; }
    .bg-elevated { background-color: var(--bg-card); }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 4px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.02rem;
      max-width: 820px;
      margin-bottom: 0;
    }

    /* 卡片体系 */
    .content-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      height: 100%;
      position: relative;
    }
    .content-card:hover {
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: var(--shadow-sm);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 20px;
      background: var(--primary-light);
      color: var(--primary);
    }
    .card-icon.accent-icon {
      background: var(--accent-light);
      color: var(--accent);
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .card-text {
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.65;
      margin-bottom: 0;
    }

    /* 首屏沉浸海报 Hero */
    .hero-section {
      padding: 100px 0 80px;
      background: linear-gradient(180deg, rgba(15, 17, 23, 0.45) 0%, rgba(15, 17, 23, 0.98) 100%),
                  url('/assets/images/0afbd5604e805087.jpg') center/cover no-repeat;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-badge-wrap {
      display: flex;
      gap: 12px;
      align-items: center;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }
    .hero-badge {
      font-size: 0.8rem;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #FFFFFF;
    }
    .hero-badge.highlight {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary);
    }
    .hero-title {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.2;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .hero-desc {
      color: #D1D5DB;
      font-size: 1.12rem;
      line-height: 1.8;
      max-width: 860px;
      margin-bottom: 34px;
    }
    .hero-stats-panel {
      background: rgba(24, 27, 36, 0.85);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(10px);
    }
    .mono-stat {
      font-family: var(--font-mono);
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }

    /* 流程与序列 */
    .step-node {
      position: relative;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
    }
    .step-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.15);
      line-height: 1;
      margin-bottom: 12px;
    }

    /* 案例与图文 */
    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .case-img-wrap {
      height: 220px;
      position: relative;
      overflow: hidden;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .case-content {
      padding: 26px;
    }
    .tag-bubble {
      display: inline-block;
      font-size: 0.78rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.06);
      color: var(--text-muted);
      margin-right: 6px;
      margin-bottom: 10px;
    }

    /* 对比与权益 */
    .tier-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .tier-box.pro-tier {
      border-color: var(--primary);
      box-shadow: 0 0 30px rgba(0, 245, 160, 0.12);
    }
    .tier-price {
      font-size: 2rem;
      font-weight: 700;
      color: #FFFFFF;
      margin: 16px 0;
      font-family: var(--font-mono);
    }
    .tier-feature-list {
      list-style: none;
      margin: 0 0 26px;
      padding: 0;
      flex-grow: 1;
    }
    .tier-feature-list li {
      margin-bottom: 10px;
      font-size: 0.92rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tier-feature-list li i {
      color: var(--primary);
      font-size: 0.85rem;
    }

    /* FAQ 手风琴 */
    .faq-accordion .accordion-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-accordion .accordion-title {
      padding: 18px 24px;
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      border: none;
      background: transparent;
    }
    .faq-accordion .accordion-content {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 保障条与指标条 */
    .guarantee-bar {
      border: 1px solid var(--border-color);
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    /* 表单与输入 */
    .form-control-custom {
      width: 100%;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      color: #FFFFFF;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      outline: none;
      transition: border 0.25s ease;
      margin-bottom: 14px;
    }
    .form-control-custom:focus {
      border-color: var(--primary);
      background: rgba(255, 255, 255, 0.07);
    }

    /* 页脚规范 */
    .site-footer {
      background: #0B0D12;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: var(--text-muted); }
    .footer-links a:hover { color: var(--primary); }
    .copyright-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 40px;
      padding-top: 24px;
      font-size: 0.84rem;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2.1rem; }
      .app-section { padding: 50px 0; }
      .section-title { font-size: 1.7rem; }
      .header-actions .btn { padding: 8px 14px; font-size: 0.82rem; }
      .copyright-bar { flex-direction: column; text-align: center; }
    }