:root {
    --primary: #c8102e;
    --secondary: #ffca00;
    --dark: #1a1a2e;
    --light: #f8f9fa;
    --accent: #007bff;
    --text: #333;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
  }
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--light);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
  }
  a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
  }
  a:hover {
    color: var(--primary);
    text-decoration: underline;
  }
  header {
    background: var(--dark);
    padding: 0 5%;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }
  .header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1300px;
    margin: 0 auto;
    flex-wrap: wrap;
  }
  .my-logo {
    display: inline-block;
    font-size: 2rem;
    font-weight: 900;
    color: var(--secondary);
    letter-spacing: 1px;
    padding: 8px 0;
    text-decoration: none;
  }
  .my-logo span {
    color: var(--primary);
  }
  .my-logo:hover {
    text-decoration: none;
    opacity: 0.85;
  }
  nav.main-nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
  }
  nav.main-nav a {
    color: #fff;
    font-weight: 600;
    padding: 10px 12px;
    border-radius: 6px;
    transition: background 0.3s;
  }
  nav.main-nav a:hover,
  nav.main-nav a.active {
    background: var(--primary);
    color: #fff;
    text-decoration: none;
  }
  .hamburger {
    display: none;
    font-size: 1.8rem;
    color: #fff;
    cursor: pointer;
    user-select: none;
  }
  #nav-toggle {
    display: none;
  }
  .breadcrumb-wrap {
    background: #fff;
    border-bottom: 1px solid #eee;
  }
  .breadcrumb {
    max-width: 1300px;
    margin: 0 auto;
    padding: 10px 5%;
    font-size: 0.9rem;
  }
  .breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
  }
  .breadcrumb li:not(:last-child)::after {
    content: ">";
    margin: 0 8px;
    color: #999;
  }
  main {
    max-width: 1300px;
    margin: 0 auto;
    padding: 30px 5%;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
  }
  .content {
    min-width: 0;
  }
  .sidebar {
    border-left: 1px solid #eee;
    padding-left: 20px;
  }
  article h1 {
    font-size: 2.4rem;
    line-height: 1.2;
    color: var(--dark);
    margin-bottom: 15px;
    font-weight: 900;
  }
  article h2 {
    font-size: 1.9rem;
    color: var(--dark);
    margin-top: 45px;
    margin-bottom: 20px;
    border-bottom: 3px solid var(--secondary);
    display: inline-block;
    padding-bottom: 5px;
  }
  article h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-top: 30px;
    margin-bottom: 10px;
  }
  article h4 {
    font-size: 1.15rem;
    color: #555;
    margin-top: 20px;
    margin-bottom: 8px;
  }
  article p {
    margin-bottom: 1.2rem;
  }
  article ul, article ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
  }
  article li {
    margin-bottom: 0.5rem;
  }
  .highlight-box {
    background: #fff9db;
    border-left: 6px solid var(--secondary);
    padding: 18px 20px;
    border-radius: 8px;
    margin: 25px 0;
  }
  .info-box {
    background: #e7f1ff;
    border-left: 6px solid var(--accent);
    padding: 18px 20px;
    border-radius: 8px;
    margin: 25px 0;
  }
  .tip-box {
    background: #d4edda;
    border-left: 6px solid #28a745;
    padding: 18px 20px;
    border-radius: 8px;
    margin: 25px 0;
  }
  .game-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 25px;
    margin: 25px 0;
    border-top: 5px solid var(--primary);
  }
  .game-card h3 {
    margin-top: 0;
  }
  .table-wrap {
    overflow-x: auto;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin: 25px 0;
  }
  table {
    width: 100%;
    border-collapse: collapse;
  }
  th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
  }
  th {
    background: var(--dark);
    color: #fff;
  }
  tr:hover {
    background: #f1f3f5;
  }
  .btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
  }
  .btn:hover {
    background: #a30d23;
    transform: translateY(-2px);
    color: #fff;
    text-decoration: none;
  }
  .search-box {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin: 25px 0;
    text-align: center;
  }
  .search-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
  }
  .search-group input[type="search"] {
    padding: 12px 18px;
    font-size: 1rem;
    border: 2px solid #ddd;
    border-radius: 50px;
    width: 300px;
    max-width: 100%;
    outline: none;
    transition: border 0.3s;
  }
  .search-group input[type="search"]:focus {
    border-color: var(--primary);
  }
  .sidebar-widget {
    background: #fff;
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 25px;
  }
  .sidebar-widget h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--dark);
    border-bottom: 2px solid var(--secondary);
    padding-bottom: 6px;
  }
  .sidebar-widget ul {
    list-style: none;
  }
  .sidebar-widget li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px dashed #eee;
  }
  .sidebar-widget li a i {
    color: var(--primary);
    width: 18px;
    text-align: center;
  }
  .form-panel {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 25px;
    margin: 30px 0;
  }
  .form-panel h2 {
    margin-top: 0;
    border-bottom: none;
  }
  input[type="url"], input[type="email"], input[type="text"], textarea, select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    margin: 8px 0 18px;
    outline: none;
    transition: border 0.3s;
    font-family: inherit;
  }
  input:focus, textarea:focus {
    border-color: var(--primary);
  }
  textarea {
    min-height: 120px;
    resize: vertical;
  }
  .star-rating {
    display: flex;
    direction: row-reverse;
    justify-content: flex-start;
    gap: 5px;
    font-size: 2rem;
  }
  .star-rating input {
    display: none;
  }
  .star-rating label {
    color: #ccc;
    cursor: pointer;
    transition: color 0.2s;
  }
  .star-rating input:checked ~ label,
  .star-rating label:hover,
  .star-rating label:hover ~ label {
    color: var(--secondary);
  }
  .article-image {
    margin: 25px 0;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  .article-image img {
    width: 100%;
    height: auto;
    display: block;
  }
  .caption {
    background: #f1f3f5;
    padding: 8px 15px;
    font-size: 0.85rem;
    color: #666;
    text-align: center;
  }
  footer {
    background: var(--dark);
    color: #bbb;
    padding: 40px 5% 20px;
    margin-top: 50px;
  }
  .footer-container {
    max-width: 1300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
  }
  footer h4 {
    color: #fff;
    margin-bottom: 15px;
  }
  footer a {
    color: #ddd;
  }
  footer a:hover {
    color: var(--secondary);
  }
  .footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid #333;
    margin-top: 30px;
    font-size: 0.85rem;
  }
  friend-link {
    display: block;
    background: #222;
    border-radius: 8px;
    padding: 15px 18px;
    margin-top: 15px;
    border: 1px solid #333;
  }
  friend-link a {
    display: inline-block;
    margin: 5px 10px 5px 0;
  }
  @media (max-width: 900px) {
    main {
      grid-template-columns: 1fr;
      padding: 20px 4%;
    }
    .sidebar {
      border-left: none;
      padding-left: 0;
      margin-top: 40px;
    }
    nav.main-nav {
      display: none;
      width: 100%;
      flex-direction: column;
      background: var(--dark);
      padding: 10px 0;
    }
    #nav-toggle:checked ~ nav.main-nav {
      display: flex;
    }
    .hamburger {
      display: block;
    }
    article h1 {
      font-size: 1.9rem;
    }
    article h2 {
      font-size: 1.5rem;
    }
    article h3 {
      font-size: 1.2rem;
    }
  }
  @media (max-width: 480px) {
    .search-group input[type="search"] {
      width: 100%;
    }
    .my-logo {
      font-size: 1.5rem;
    }
  }