/* roulang page: index */
:root {
      --hph-primary: #d97706;
      --hph-primary-dark: #b45309;
      --hph-secondary: #0f172a;
      --hph-accent: #f59e0b;
      --hph-bg-light: #f8fafc;
      --hph-bg-card: #ffffff;
      --hph-text: #1e293b;
      --hph-muted: #64748b;
      --hph-border: #e2e8f0;
      --hph-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      --hph-nav-gradient: linear-gradient(90deg, #0f172a 0%, #1e293b 60%, #b45309 100%);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--hph-text);
      background-color: #ffffff;
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* 渐变通栏导航 */
    .hph-header {
      background: var(--hph-nav-gradient);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .hph-brand {
      font-size: 1.65rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #ffffff !important;
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }
    .hph-brand .brand-badge {
      font-size: 0.75rem;
      background: var(--hph-accent);
      color: #0f172a;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 700;
    }
    .hph-nav-link {
      color: rgba(255, 255, 255, 0.9) !important;
      font-weight: 500;
      padding: 0.5rem 1.1rem !important;
      border-radius: 6px;
      transition: all 0.25s ease;
      position: relative;
    }
    .hph-nav-link:hover, .hph-nav-link.active {
      color: #ffffff !important;
      background: rgba(255, 255, 255, 0.12);
    }
    .hph-nav-cta {
      background: #f59e0b;
      color: #0f172a !important;
      font-weight: 700;
      padding: 0.5rem 1.25rem !important;
      border-radius: 6px;
      transition: all 0.3s;
      border: none;
    }
    .hph-nav-cta:hover {
      background: #fbbf24;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
    }

    /* Hero：路线图预告与版本节点 */
    .hph-hero {
      background: linear-gradient(180deg, #0f172a 0%, #1e293b 85%, #f8fafc 100%);
      color: #ffffff;
      padding: 5rem 0 4rem;
      position: relative;
    }
    .hph-hero h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.25rem;
      letter-spacing: -0.5px;
    }
    .hph-hero .hero-desc {
      font-size: 1.125rem;
      color: #cbd5e1;
      line-height: 1.8;
      max-width: 880px;
      margin: 0 auto 2.5rem;
    }
    .roadmap-bar {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 14px;
      padding: 1.5rem 2rem;
      margin-bottom: 2rem;
      backdrop-filter: blur(8px);
    }
    .node-item {
      position: relative;
      padding: 0 1rem;
    }
    .node-status {
      display: inline-block;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--hph-accent);
      margin-right: 6px;
    }
    .subscribe-box {
      max-width: 580px;
      margin: 0 auto;
    }
    .subscribe-box .form-control {
      border-radius: 8px 0 0 8px;
      border: none;
      padding: 0.85rem 1.25rem;
    }
    .subscribe-box .btn {
      border-radius: 0 8px 8px 0;
      padding: 0.85rem 1.75rem;
      background: var(--hph-accent);
      color: #0f172a;
      font-weight: 700;
      border: none;
    }

    /* 板块通用布局 */
    .hph-section {
      padding: 4.5rem 0;
      position: relative;
    }
    .hph-section.bg-alt {
      background-color: var(--hph-bg-light);
    }
    .section-header {
      margin-bottom: 3rem;
    }
    .section-header .section-tag {
      display: inline-block;
      color: var(--hph-primary-dark);
      background: #fef3c7;
      padding: 4px 12px;
      font-size: 0.825rem;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 0.75rem;
    }
    .section-header h2 {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--hph-secondary);
      margin-bottom: 1rem;
    }
    .section-header p {
      color: var(--hph-muted);
      font-size: 1.05rem;
      line-height: 1.75;
      max-width: 820px;
      margin: 0 auto;
    }

    /* 样式卡片与内容组件 */
    .hph-card {
      background: var(--hph-bg-card);
      border: 1px solid var(--hph-border);
      border-radius: 12px;
      padding: 1.75rem;
      height: 100%;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      display: flex;
      flex-direction: column;
    }
    .hph-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
      border-color: #cbd5e1;
    }
    .hph-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #fef3c7;
      color: var(--hph-primary-dark);
      font-size: 1.35rem;
      margin-bottom: 1.25rem;
    }
    .badge-chip {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.75rem;
      font-weight: 600;
      background: #f1f5f9;
      color: #475569;
    }
    .rating-badge {
      background: #fffbeb;
      color: #b45309;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid #fde68a;
    }

    /* 评分排行榜与指标 */
    .rank-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: #f1f5f9;
      color: #475569;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }
    .rank-num.top-1 { background: #fef3c7; color: #b45309; }
    .rank-num.top-2 { background: #e2e8f0; color: #334155; }
    .rank-num.top-3 { background: #ffedd5; color: #c2410c; }

    /* 步骤流样式 */
    .step-node {
      border-left: 2px solid #e2e8f0;
      padding-left: 1.75rem;
      position: relative;
      padding-bottom: 2rem;
    }
    .step-node::before {
      content: "";
      position: absolute;
      left: -9px;
      top: 0;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--hph-primary);
      border: 3px solid #ffffff;
    }

    /* 页脚 */
    .hph-footer {
      background: #0b1120;
      color: #94a3b8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1e293b;
    }
    .hph-footer h4 {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .hph-footer a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }
    .hph-footer a:hover {
      color: #ffffff;
    }
    .footer-divider {
      border-top: 1px solid #1e293b;
      margin: 2.5rem 0 1.5rem;
    }

    @media (max-width: 991.98px) {
      .hph-hero h1 { font-size: 2.2rem; }
      .hph-section { padding: 3.5rem 0; }
    }
    @media (max-width: 575.98px) {
      .hph-hero h1 { font-size: 1.75rem; }
      .roadmap-bar { padding: 1.25rem 1rem; }
      .subscribe-box .btn { width: 100%; border-radius: 8px; margin-top: 0.5rem; }
      .subscribe-box .form-control { border-radius: 8px; }
      .subscribe-box .input-group { display: flex; flex-direction: column; }
    }