/* ========== 导航栏 ========== */
    .nav-wrap {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: linear-gradient(90deg, #7f1d1d, #991b1b, #b91c1c);
      box-shadow: 0 2px 12px rgba(0,0,0,0.35);
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
    }
    .nav-wrap::-webkit-scrollbar { display: none; }

    .nav {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0 16px;
    }
    .nav a {
      position: relative;
      padding: 14px 20px;
      font-size: 16px;
      font-weight: 500;
      color: #fcd34d;
      text-decoration: none;
      transition: color 0.3s ease, text-shadow 0.3s ease;
    }
    .nav a:hover {
      color: #fde68a;
      text-shadow: 0 0 8px rgba(252, 211, 77, 0.8);
    }
    .nav a[aria-current="page"] {
      color: #fff8dc;
      font-weight: 600;
      text-shadow: 0 0 10px rgba(255, 215, 0, 0.9);
    }
    .nav a::after {
      content: "";
      position: absolute;
      bottom: 6px;
      left: 50%;
      width: 0;
      height: 3px;
      background: linear-gradient(90deg, #fbbf24, #f59e0b, #d97706);
      border-radius: 2px;
      transition: width 0.3s ease, left 0.3s ease;
    }
    .nav a:hover::after,
    .nav a[aria-current="page"]::after {
      width: 100%;
      left: 0;
    }

    /* ========== 文章区 ========== */
    .article-container {
      max-width: 800px;
      margin: 40px auto;
      padding: 30px;
      background: #fff;
      box-shadow: 0 4px 16px rgba(0,0,0,0.1);
      border-radius: 12px;
      animation: fadeInUp 0.8s ease;
    }
    .article-title {
      font-size: 30px;
      font-weight: bold;
      margin-bottom: 20px;
      text-align: center;
      color: #222;
    }
    .article-content {
      font-size: 16px;
      text-align: justify;
      line-height: 1.9;
      color: #333;
    }

    /* ========== 页脚 ========== */
    footer {
      background: linear-gradient(90deg, #7f1d1d, #991b1b, #b91c1c);
      color: #fcd34d;
      text-align: center;
      padding: 18px 0;
      font-size: 14px;
      box-shadow: 0 -2px 12px rgba(0,0,0,0.35);
    }
    footer a {
      color: #fde68a;
      text-decoration: none;
      margin: 0 8px;
      transition: color 0.3s ease, text-shadow 0.3s ease;
    }
    footer a:hover {
      color: #fff8dc;
      text-shadow: 0 0 8px rgba(252, 211, 77, 0.8);
    }

    /* ========== 动画效果 ========== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* ========== 响应式设计 ========== */
    @media (max-width: 768px) {
      .article-container { padding: 20px; margin: 20px; }
      .article-title { font-size: 24px; }
      .article-content { font-size: 15px; }
    }
    @media (max-width: 480px) {
      .article-container { padding: 15px; }
      .article-title { font-size: 20px; }
      .article-content { font-size: 14px; line-height: 1.7; }
    }