/* roulang page: index */
/* ----- 设计变量 & 基础重置 ----- */
    :root {
      --primary: #c84b6b;      /* 柔和高亮主色，紫红调 */
      --primary-soft: #f2d5e0;
      --secondary: #3b2c3f;    /* 深紫褐辅色 */
      --accent: #f4b84a;       /* 暖金点缀 */
      --bg-page: #fef9fb;
      --bg-card: #ffffff;
      --bg-dark: #261d24;
      --text-main: #2e2430;
      --text-soft: #6b5e6e;
      --text-on-dark: #f7ecf1;
      --border: #e7d7df;
      --shadow-sm: 0 8px 20px rgba(60, 30, 45, 0.06);
      --shadow-md: 0 18px 35px rgba(45, 20, 35, 0.09);
      --shadow-glow: 0 15px 30px rgba(200, 75, 107, 0.18);
      --radius-lg: 28px;
      --radius-md: 18px;
      --radius-sm: 12px;
      --radius-btn: 40px;
      --transition: 0.25s ease;
      --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background: var(--bg-page);
      color: var(--text-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    /* ----- 容器 ----- */
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* ----- 导航 ----- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 248, 251, 0.8);
      backdrop-filter: blur(14px);
      box-shadow: 0 4px 18px rgba(0,0,0,0.02);
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-weight: 700;
      font-size: 1.9rem;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #c84b6b 0%, #e67e46 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: inline-block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.2rem;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 0.4rem 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .nav-cta {
      background: var(--primary);
      color: white;
      padding: 0.7rem 1.9rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 8px 18px rgba(200, 75, 107, 0.35);
      letter-spacing: 0.3px;
    }

    .nav-cta:hover {
      background: #b13e5b;
      box-shadow: 0 12px 24px rgba(180, 65, 95, 0.4);
      transform: translateY(-1px);
    }

    .mobile-toggle {
      display: none;
      font-size: 1.5rem;
      color: var(--text-main);
    }

    /* ----- 首屏 Hero ----- */
    .hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center 30%;
      position: relative;
      padding: 5rem 0 6rem;
      border-radius: 0 0 60px 60px;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(30,18,25,0.7) 0%, rgba(55,29,42,0.5) 70%);
      border-radius: 0 0 60px 60px;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      color: white;
    }

    .hero h1 {
      font-size: clamp(2.8rem, 6vw, 4.4rem);
      font-weight: 700;
      line-height: 1.2;
      text-shadow: 0 8px 18px rgba(0,0,0,0.5);
      margin-bottom: 1.25rem;
    }

    .hero-highlight {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(8px);
      padding: 0.4rem 1.8rem;
      border-radius: 40px;
      font-size: 1.2rem;
      display: inline-block;
      margin-bottom: 2rem;
      border: 1px solid rgba(255,255,255,0.25);
    }

    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
      justify-content: center;
    }

    .btn-primary {
      background: var(--accent);
      color: #2e1f24;
      padding: 0.9rem 2.5rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      box-shadow: var(--shadow-glow);
    }

    .btn-outline-light {
      border: 2px solid rgba(255,255,255,0.8);
      color: white;
      padding: 0.9rem 2.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      backdrop-filter: blur(4px);
    }

    /* 通用板块 */
    .section {
      padding: 5rem 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: var(--secondary);
    }

    .section-sub {
      color: var(--text-soft);
      font-size: 1.2rem;
      margin-bottom: 3rem;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 2rem;
    }

    .feature-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 2.2rem 1.8rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid var(--border);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: #d6b7c5;
    }

    .icon-circle {
      width: 58px;
      height: 58px;
      background: var(--primary-soft);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.6rem;
      margin-bottom: 1.5rem;
    }

    /* 社区/人物卡片 */
    .community-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem;
    }

    .persona-card {
      background: #fff;
      border-radius: 32px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
      text-align: center;
    }
    .persona-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .badge-rank {
      background: var(--accent);
      color: #2d1f14;
      font-weight: 700;
      padding: 0.2rem 1.2rem;
      border-radius: 20px;
      font-size: 0.8rem;
      display: inline-block;
      margin: -15px auto 0.8rem;
      position: relative;
      z-index: 2;
    }

    /* 数据块 */
    .stats-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 3rem;
      background: var(--bg-dark);
      border-radius: 50px;
      padding: 2.8rem 2rem;
      color: var(--text-on-dark);
      margin-top: 2rem;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      padding: 1.4rem 2rem;
      margin-bottom: 1rem;
      box-shadow: var(--shadow-sm);
      border-left: 5px solid var(--primary);
    }

    /* 页脚 */
    .footer {
      background: #1f151b;
      color: #dacdd3;
      padding: 3rem 0 2rem;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .container { padding: 0 1.5rem; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255,248,251,0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        backdrop-filter: blur(20px);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .hero {
        border-radius: 0 0 40px 40px;
      }
    }