/* roulang page: index */
:root {
      --sp-green: #00E676;
      --sp-green-dark: #00C853;
      --sp-orange: #FF3D00;
      --sp-dark-base: #0F1115;
      --sp-dark-surface: #181B20;
      --sp-dark-card: #20242B;
      --sp-light-bg: #F8F9FA;
      --sp-light-surface: #FFFFFF;
      --sp-border-light: rgba(0, 0, 0, 0.08);
      --sp-border-dark: rgba(255, 255, 255, 0.08);
      --sp-text-main: #1A1D20;
      --sp-text-muted: #6C757D;
      --sp-font-num: 'Chakra Petch', 'DIN Alternate', Consolas, monospace;
      --sp-radius: 16px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      background-color: var(--sp-light-bg);
      color: var(--sp-text-main);
      overflow-x: hidden;
      line-height: 1.6;
    }

    .num-font {
      font-family: var(--sp-font-num);
    }

    /* 顶部多层导航系统 */
    .top-meta-bar {
      background-color: var(--sp-dark-base);
      color: #A0AEC0;
      font-size: 0.8125rem;
      border-bottom: 1px solid var(--sp-border-dark);
      padding: 6px 0;
    }

    .site-nav-main {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      border-bottom: 1px solid var(--sp-border-light);
      position: sticky;
      top: 0;
      z-index: 1030;
    }

    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--sp-dark-base);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo .dot {
      width: 10px;
      height: 10px;
      background-color: var(--sp-green);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--sp-green);
    }

    /* 导航变体：Hero 下方 Pill 导航条 */
    .pill-nav-container {
      background: #FFFFFF;
      border-bottom: 1px solid var(--sp-border-light);
      position: sticky;
      top: 73px;
      z-index: 1020;
      padding: 10px 0;
    }
    .pill-nav-wrapper {
      display: flex;
      gap: 12px;
      overflow-x: auto;
      white-space: nowrap;
      padding: 4px 2px;
      scrollbar-width: none;
    }
    .pill-nav-wrapper::-webkit-scrollbar {
      display: none;
    }
    .pill-nav-item {
      padding: 7px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #4A5568;
      background: #EDF2F7;
      text-decoration: none;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .pill-nav-item:hover, .pill-nav-item.active {
      background: var(--sp-dark-base);
      color: var(--sp-green);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    /* 通用板块与排版 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--sp-green-dark);
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--sp-dark-base);
      line-height: 1.25;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--sp-text-muted);
      max-width: 760px;
      margin-top: 12px;
    }

    /* 按钮重塑 */
    .btn-sp-green {
      background-color: var(--sp-green);
      color: #000000;
      font-weight: 700;
      border: none;
      border-radius: 50px;
      padding: 12px 30px;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-sp-green:hover {
      background-color: var(--sp-green-dark);
      color: #000000;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0, 230, 118, 0.35);
    }
    .btn-sp-dark {
      background-color: var(--sp-dark-base);
      color: #FFFFFF;
      font-weight: 600;
      border: 1px solid var(--sp-border-dark);
      border-radius: 50px;
      padding: 12px 28px;
      transition: all 0.25s ease;
    }
    .btn-sp-dark:hover {
      background-color: #2D3748;
      color: #FFFFFF;
      transform: translateY(-2px);
    }

    /* 卡片系统 */
    .sp-card {
      background: var(--sp-light-surface);
      border: 1px solid var(--sp-border-light);
      border-radius: var(--sp-radius);
      padding: 30px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
    }
    .sp-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.06);
    }

    /* 首屏杂志分栏 */
    .hero-mag-banner {
      background: linear-gradient(135deg, #0A0C0E 0%, #15181F 100%);
      color: #FFFFFF;
      padding: 80px 0 100px;
      position: relative;
      overflow: hidden;
    }
    .hero-mag-banner::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: url('/assets/images/1d371b45ce907875.png') center/cover no-repeat;
      opacity: 0.12;
      pointer-events: none;
    }
    .hero-h1 {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-h1 .highlight {
      color: var(--sp-green);
    }
    .hero-card-featured {
      background: rgba(24, 27, 32, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--sp-radius);
      backdrop-filter: blur(16px);
      padding: 28px;
    }

    /* 核心指标看板 */
    .metric-box {
      border-right: 1px solid var(--sp-border-light);
      padding: 10px 24px;
    }
    .metric-box:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--sp-dark-base);
      line-height: 1;
      margin-bottom: 6px;
    }

    /* 深色沉浸看板区 */
    .section-dark-immersive {
      background-color: var(--sp-dark-base);
      color: #FFFFFF;
    }
    .section-dark-immersive .sp-card {
      background: var(--sp-dark-surface);
      border-color: var(--sp-border-dark);
      color: #FFFFFF;
    }
    .section-dark-immersive .section-title {
      color: #FFFFFF;
    }
    .section-dark-immersive .section-desc {
      color: #A0AEC0;
    }

    /* 对比表格重塑 */
    .table-compare-custom {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border-radius: var(--sp-radius);
      overflow: hidden;
      background: #FFFFFF;
      border: 1px solid var(--sp-border-light);
    }
    .table-compare-custom th, .table-compare-custom td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--sp-border-light);
      vertical-align: middle;
    }
    .table-compare-custom th {
      background-color: #F8F9FA;
      font-size: 1.05rem;
      font-weight: 700;
    }
    .table-compare-custom tr:last-child td {
      border-bottom: none;
    }

    /* 时间轴系统 */
    .timeline-track {
      position: relative;
      padding-left: 36px;
    }
    .timeline-track::before {
      content: '';
      position: absolute;
      left: 11px;
      top: 6px;
      bottom: 6px;
      width: 2px;
      background: #E2E8F0;
    }
    .timeline-node {
      position: relative;
      margin-bottom: 40px;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-point {
      position: absolute;
      left: -36px;
      top: 4px;
      width: 24px;
      height: 24px;
      background: #FFFFFF;
      border: 4px solid var(--sp-green);
      border-radius: 50%;
    }

    /* FAQ 手风琴重构 */
    .accordion-item-sp {
      background: #FFFFFF;
      border: 1px solid var(--sp-border-light);
      border-radius: 12px !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-button-sp {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--sp-dark-base);
      background: transparent;
      border: none;
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-align: left;
    }
    .accordion-button-sp:not(.collapsed) {
      border-left: 4px solid var(--sp-green);
      background: #F8FAFC;
    }
    .accordion-body-sp {
      padding: 0 24px 20px;
      color: var(--sp-text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0A0C0E;
      color: #A0AEC0;
      padding: 80px 0 30px;
      border-top: 1px solid var(--sp-border-dark);
      font-size: 0.9rem;
    }
    .site-footer a {
      color: #CBD5E0;
      text-decoration: none;
      transition: color 0.2s;
    }
    .site-footer a:hover {
      color: var(--sp-green);
    }
    .footer-divider {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin: 40px 0 24px;
    }

    @media (max-width: 991.98px) {
      .hero-h1 { font-size: 2.4rem; }
      .metric-box { border-right: none; border-bottom: 1px solid var(--sp-border-light); margin-bottom: 16px; }
      .pill-nav-container { top: 62px; }
    }
    @media (max-width: 575.98px) {
      .hero-h1 { font-size: 1.95rem; }
      section { padding: 60px 0; }
    }