/* roulang page: index */
:root {
      --bg-dark: #0A0B0E;
      --bg-card: #12141A;
      --bg-card-sub: #171B24;
      --border-color: #1E222D;
      --border-highlight: rgba(0, 255, 163, 0.4);
      --neon-primary: #00FFA3;
      --neon-secondary: #7928CA;
      --neon-blue: #0070F3;
      --text-white: #F5F7FA;
      --text-muted: #94A3B8;
      --text-darker: #64748B;
      --radius-sm: 6px;
      --radius-md: 8px;
      --transition-default: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-white);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      font-size: 16px;
    }

    a {
      color: var(--text-white);
      text-decoration: none;
      transition: var(--transition-default);
    }
    a:hover, a:focus {
      color: var(--neon-primary);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部辅助条与导航 */
    .top-sub-bar {
      background: #060709;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.8rem;
      color: var(--text-darker);
      padding: 6px 0;
    }
    .top-sub-bar a {
      color: var(--text-darker);
      margin-left: 15px;
    }
    .top-sub-bar a:hover {
      color: var(--neon-primary);
    }

    .main-nav-wrapper {
      background: rgba(10, 11, 14, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-white);
    }
    .brand-logo i {
      color: var(--neon-primary);
      text-shadow: 0 0 12px rgba(0, 255, 163, 0.8);
      font-size: 1.4rem;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 26px;
      margin: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--neon-primary);
    }
    .nav-links li a.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--neon-primary);
      box-shadow: 0 0 8px var(--neon-primary);
    }

    .btn-neon-primary {
      background: var(--neon-primary);
      color: #050608 !important;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 0.95rem;
      border: 1px solid var(--neon-primary);
      cursor: pointer;
      box-shadow: 0 0 15px rgba(0, 255, 163, 0.2);
    }
    .btn-neon-primary:hover {
      background: #00e08f;
      box-shadow: 0 0 25px rgba(0, 255, 163, 0.45);
      transform: translateY(-1px);
    }

    .btn-ghost {
      background: transparent;
      color: var(--text-white);
      border: 1px solid rgba(255, 255, 255, 0.2);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 0.95rem;
      cursor: pointer;
    }
    .btn-ghost:hover {
      border-color: var(--neon-primary);
      color: var(--neon-primary);
      box-shadow: 0 0 15px rgba(0, 255, 163, 0.15);
    }

    /* 通用 section 样式 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background: #0E1015;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-head {
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--neon-primary);
      background: rgba(0, 255, 163, 0.08);
      border: 1px solid rgba(0, 255, 163, 0.25);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.3rem;
      font-weight: 700;
      line-height: 1.25;
      color: var(--text-white);
      margin-bottom: 16px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 780px;
      line-height: 1.7;
    }

    /* 卡片通用 */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      transition: var(--transition-default);
    }
    .feature-card:hover {
      border-color: var(--border-highlight);
      box-shadow: 0 0 20px rgba(0, 255, 163, 0.12);
      transform: translateY(-2px);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 255, 163, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-primary);
      font-size: 1.3rem;
      margin-bottom: 20px;
    }

    /* 1. Hero 板块 */
    #hero {
      padding: 80px 0 100px 0;
      background: linear-gradient(180deg, rgba(10,11,14,0.7) 0%, rgba(10,11,14,0.98) 100%), url('/assets/images/6f9514ea4a75f1a7.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -1px;
      margin-bottom: 22px;
    }
    .hero-h1 span {
      background: linear-gradient(90deg, #00FFA3, #0070F3);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      max-width: 660px;
      line-height: 1.75;
    }
    .checklist-row {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 36px;
    }
    .check-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: #CBD5E1;
      background: rgba(255, 255, 255, 0.03);
      padding: 6px 14px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .check-item i {
      color: var(--neon-primary);
    }
    .hero-media-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
      position: relative;
    }
    .hero-media-status {
      position: absolute;
      top: 14px;
      right: 14px;
      background: rgba(10, 11, 14, 0.85);
      border: 1px solid var(--neon-primary);
      padding: 5px 12px;
      border-radius: 4px;
      font-size: 0.75rem;
      color: var(--neon-primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .pulse-dot {
      width: 6px;
      height: 6px;
      background: var(--neon-primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-primary);
    }

    /* 2. Overview */
    .tech-metric-banner {
      background: rgba(0, 255, 163, 0.04);
      border-left: 3px solid var(--neon-primary);
      padding: 14px 20px;
      margin: 25px 0;
      font-size: 0.92rem;
      color: #E2E8F0;
    }

    /* 4. Modes */
    .mode-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
      position: relative;
    }
    .mode-card.featured {
      border-color: var(--neon-primary);
      background: linear-gradient(180deg, rgba(0, 255, 163, 0.05) 0%, #12141A 100%);
    }
    .mode-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--neon-primary);
      color: #050608;
      font-weight: 800;
      font-size: 0.75rem;
      padding: 2px 14px;
      border-radius: 10px;
      text-transform: uppercase;
    }

    /* 5. Case Study */
    .case-container {
      background: #07080B;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .timeline-track {
      background: #171B24;
      height: 8px;
      border-radius: 4px;
      margin: 25px 0 15px 0;
      position: relative;
    }
    .timeline-progress {
      background: linear-gradient(90deg, #7928CA, #00FFA3);
      width: 68%;
      height: 100%;
      border-radius: 4px;
    }
    .timeline-point {
      position: absolute;
      top: -6px;
      width: 20px;
      height: 20px;
      background: var(--neon-primary);
      border: 4px solid #07080B;
      border-radius: 50%;
      box-shadow: 0 0 10px var(--neon-primary);
    }

    /* 7. Metrics */
    .metrics-bar {
      background: #090B0F;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 40px 20px;
      text-align: center;
    }
    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--neon-primary);
      line-height: 1.1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-label {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    /* 9. News */
    .news-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .news-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-darker);
      margin-bottom: 8px;
    }

    /* 10. Comparison Table */
    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #171B24;
      font-weight: 700;
      color: var(--text-white);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .col-highlight {
      color: var(--neon-primary);
      font-weight: 600;
    }

    /* 11. FAQ Accordion */
    .accordion-item-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-toggle {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 20px 24px;
      color: var(--text-white);
      font-size: 1.05rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .accordion-toggle:hover {
      color: var(--neon-primary);
    }
    .accordion-content {
      padding: 0 24px 20px 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 12. Guarantee */
    .guarantee-badge {
      display: flex;
      align-items: center;
      gap: 15px;
      background: #131720;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px;
    }
    .guarantee-badge i {
      font-size: 1.8rem;
      color: var(--neon-primary);
    }

    /* 13. CTA */
    .cta-card {
      background: radial-gradient(circle at 50% 0%, rgba(0, 255, 163, 0.15) 0%, #12141A 75%);
      border: 1px solid rgba(0, 255, 163, 0.3);
      border-radius: var(--radius-md);
      padding: 60px 40px;
      text-align: center;
      box-shadow: 0 0 35px rgba(0, 255, 163, 0.08);
    }
    .cta-form {
      max-width: 520px;
      margin: 30px auto 0 auto;
      display: flex;
      gap: 10px;
    }
    .cta-input {
      background: #0A0B0E;
      border: 1px solid var(--border-color);
      color: #FFF;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      flex: 1;
      font-size: 0.95rem;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--neon-primary);
    }

    /* 底部固定转化浮条 */
    .fixed-bottom-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(10, 11, 14, 0.92);
      backdrop-filter: blur(14px);
      border-top: 1px solid rgba(0, 255, 163, 0.25);
      z-index: 999;
      padding: 14px 20px;
    }
    .fixed-bar-content {
      max-width: 1240px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    /* 页脚 */
    footer {
      background: #050608;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 110px 0;
      color: var(--text-darker);
      font-size: 0.9rem;
    }
    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 20px;
    }
    .footer-list {
      list-style: none;
      margin: 0;
    }
    .footer-list li {
      margin-bottom: 10px;
    }
    .footer-list a {
      color: var(--text-darker);
    }
    .footer-list a:hover {
      color: var(--neon-primary);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.8rem; }
      .nav-links { gap: 16px; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-h1 { font-size: 2.1rem; }
      .section-title { font-size: 1.75rem; }
      .cta-form { flex-direction: column; }
      .fixed-bar-content span { display: none; }
      .fixed-bar-content { justify-content: center; width: 100%; }
      .fixed-bar-content .btn-neon-primary { width: 100%; }
      .metrics-bar { margin-bottom: 15px; }
      .compare-table th, .compare-table td { padding: 12px 14px; font-size: 0.85rem; }
    }