/* roulang page: index */
:root {
      --primary: #1C1C1E;
      --accent: #E94E1B;
      --bg: #FAF9F7;
      --card-bg: #FFFFFF;
      --text: #1C1C1E;
      --text-secondary: #5A5A5A;
      --text-muted: #9A9A9A;
      --border: #E5E5E5;
      --radius: 12px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.5;
      overflow-x: hidden;
      margin: 0;
    }
    /* 自定义 Tailwind 扩展 */
    .text-accent { color: var(--accent) !important; }
    .bg-accent { background-color: var(--accent) !important; }
    .border-accent { border-color: var(--accent) !important; }
    .bg-primary { background-color: var(--primary) !important; }
    .text-primary { color: var(--primary) !important; }
    .text-muted { color: var(--text-muted) !important; }
    .bg-warm { background-color: var(--bg) !important; }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .card:hover {
      border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(0,0,0,0.08);
    }
    .gradient-text {
      background: linear-gradient(135deg, var(--primary) 0%, #333 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .btn-accent {
      background-color: var(--accent);
      color: white;
      font-weight: 600;
      padding: 12px 32px;
      border-radius: 40px;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(233, 78, 27, 0.3);
    }
    .btn-accent:hover {
      background-color: #c43f14;
      box-shadow: 0 6px 18px rgba(233, 78, 27, 0.5);
      transform: scale(1.02);
      color: white;
    }
    .btn-outline-light {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 40px;
      transition: 0.25s;
    }
    .btn-outline-light:hover {
      background: white;
      color: var(--accent);
    }
    .section-padding {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 70px 0;
      }
    }
    /* 分屏布局 */
    .split-layout {
      display: flex;
      min-height: 100vh;
    }
    .sidebar-left {
      width: 280px;
      background-color: var(--primary);
      color: white;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 2.5rem 1.5rem;
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      z-index: 40;
    }
    .main-right {
      margin-left: 280px;
      width: calc(100% - 280px);
      background-color: var(--bg);
      overflow-x: hidden;
    }
    .sidebar-nav a {
      display: block;
      color: #ccc;
      text-decoration: none;
      padding: 12px 16px;
      border-radius: 8px;
      margin-bottom: 8px;
      font-weight: 500;
      transition: 0.2s;
      font-size: 1.1rem;
    }
    .sidebar-nav a:hover,
    .sidebar-nav a.active {
      color: white;
      background: rgba(255,255,255,0.15);
    }
    .sidebar-logo {
      font-size: 2rem;
      font-weight: 800;
      letter-spacing: 2px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .sidebar-logo i {
      font-size: 2rem;
      color: var(--accent);
    }
    @media (max-width: 1024px) {
      .sidebar-left {
        width: 240px;
        padding: 2rem 1rem;
      }
      .main-right {
        margin-left: 240px;
        width: calc(100% - 240px);
      }
    }
    @media (max-width: 768px) {
      .split-layout {
        flex-direction: column;
      }
      .sidebar-left {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100%;
        height: 70px;
        flex-direction: row;
        align-items: center;
        justify-content: space-around;
        padding: 0 10px;
        background: var(--primary);
        z-index: 50;
        border-top: 1px solid #333;
      }
      .main-right {
        margin-left: 0;
        width: 100%;
        padding-bottom: 80px;
      }
      .sidebar-logo {
        display: none;
      }
      .sidebar-nav {
        display: flex;
        flex-direction: row;
        gap: 0;
        width: 100%;
        justify-content: space-around;
      }
      .sidebar-nav a {
        padding: 6px 8px;
        font-size: 0.8rem;
        margin: 0;
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
      }
      .sidebar-social {
        display: none;
      }
    }
    /* Hero区域 */
    .hero-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 500px;
    }
    .hero-overlay {
      background: linear-gradient(90deg, rgba(28,28,30,0.7) 0%, rgba(28,28,30,0.4) 100%);
      position: absolute;
      inset: 0;
    }
    /* 动画 */
    .fade-in-left {
      animation: fadeInLeft 0.8s ease forwards;
    }
    @keyframes fadeInLeft {
      from { opacity: 0; transform: translateX(-30px); }
      to { opacity: 1; transform: translateX(0); }
    }
    .count-up {
      font-family: 'SF Mono', 'Courier New', monospace;
      font-weight: 700;
    }