*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f5f7fc;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #b8860b;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #daa520;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
            padding: 1rem 0;
            border-bottom: 4px solid #b8860b;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd700;
            text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
            letter-spacing: 1px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.03);
            color: #fff3a0;
        }
        .my-logo i {
            margin-right: 0.4rem;
            color: #daa520;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-bar a {
            color: #e0e0ff;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-bar a:hover {
            background: rgba(255, 215, 0, 0.15);
            color: #ffd700;
        }
        .nav-bar a i {
            margin-right: 0.3rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #ffd700;
            color: #ffd700;
            font-size: 1.5rem;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .hamburger:hover {
            background: rgba(255, 215, 0, 0.1);
        }
        .breadcrumb {
            background: #fff;
            padding: 0.8rem 0;
            border-bottom: 1px solid #e8e8f0;
            font-size: 0.85rem;
            color: #666;
        }
        .breadcrumb a {
            color: #b8860b;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 0.4rem;
            color: #999;
        }
        .main-content {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.5rem;
            margin: 2rem 0;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0f0c29;
            line-height: 1.25;
            margin-bottom: 0.8rem;
            border-left: 6px solid #b8860b;
            padding-left: 1.2rem;
        }
        h1 i {
            color: #b8860b;
            margin-right: 0.5rem;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #1a1a3e;
            margin-top: 3rem;
            margin-bottom: 1rem;
            border-bottom: 2px solid #f0e6d0;
            padding-bottom: 0.5rem;
        }
        h2 i {
            color: #b8860b;
            margin-right: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2a2a4e;
            margin-top: 2.2rem;
            margin-bottom: 0.8rem;
        }
        h3 i {
            color: #daa520;
            margin-right: 0.4rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #3a3a5e;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2d2d44;
        }
        .last-updated {
            display: inline-block;
            background: #f0e6d0;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #6b4c1d;
            margin-bottom: 1.5rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fdf8f0, #fefcf7);
            border-left: 5px solid #b8860b;
            padding: 1.5rem 2rem;
            border-radius: 12px;
            margin: 1.8rem 0;
            box-shadow: 0 2px 12px rgba(184, 134, 11, 0.08);
        }
        .highlight-box strong {
            color: #8b6914;
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1rem;
            margin: 1.8rem 0;
        }
        .code-card {
            background: #fafafe;
            border: 1px solid #e8e8f0;
            border-radius: 14px;
            padding: 1.2rem 1.5rem;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .code-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
            border-color: #b8860b;
        }
        .code-card .code-value {
            font-family: 'Courier New', monospace;
            font-weight: 700;
            color: #0f0c29;
            font-size: 1.05rem;
        }
        .code-card .code-status {
            font-size: 0.8rem;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            background: #d4edda;
            color: #155724;
            font-weight: 600;
        }
        .code-card .code-status.expired {
            background: #f8d7da;
            color: #721c24;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.8rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        th {
            background: #0f0c29;
            color: #ffd700;
            padding: 0.9rem 1.2rem;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 0.8rem 1.2rem;
            border-bottom: 1px solid #eeeef5;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8f6ff;
        }
        .featured-image {
            border-radius: 16px;
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-image figcaption {
            background: #f8f6ff;
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #777;
            text-align: center;
            font-style: italic;
        }
        .search-section {
            background: #f8f6ff;
            border-radius: 16px;
            padding: 2rem;
            margin: 2.5rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 1rem auto 0;
            gap: 0.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #ddd;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s ease;
        }
        .search-form input:focus {
            border-color: #b8860b;
        }
        .search-form button {
            background: #b8860b;
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .search-form button:hover {
            background: #daa520;
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        @media(max-width:768px) {
            .interact-grid {
                grid-template-columns: 1fr;
            }
        }
        .interact-card {
            background: #fafafe;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            border: 1px solid #eeeef5;
        }
        .interact-card h3 {
            margin-top: 0;
        }
        .interact-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .interact-card input,
        .interact-card textarea,
        .interact-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #e0e0ee;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.3s ease;
            font-family: inherit;
        }
        .interact-card input:focus,
        .interact-card textarea:focus,
        .interact-card select:focus {
            border-color: #b8860b;
        }
        .interact-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interact-card button {
            background: #0f0c29;
            color: #ffd700;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            align-self: flex-start;
        }
        .interact-card button:hover {
            background: #302b63;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            margin: 0.3rem 0;
        }
        .star-rating i {
            transition: color 0.2s ease;
        }
        .star-rating i.active,
        .star-rating i:hover {
            color: #ffd700;
        }
        .site-footer {
            background: #0f0c29;
            color: #cccce0;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #b8860b;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
        }
        @media(max-width:768px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .footer-inner h4 {
            color: #ffd700;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.03);
            padding: 1rem 1.5rem;
            border-radius: 12px;
            border: 1px solid rgba(255, 215, 0, 0.1);
        }
        .friend-link a {
            color: #daa520;
            display: inline-block;
            margin: 0.2rem 0.6rem 0.2rem 0;
        }
        .friend-link a:hover {
            color: #fff3a0;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            color: #9999bb;
        }
        .copyright strong {
            color: #daa520;
        }
        @media(max-width:992px) {
            .main-content {
                padding: 1.5rem 1.2rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
        }
        @media(max-width:768px) {
            .hamburger {
                display: block;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 1rem;
                gap: 0.3rem;
            }
            .nav-bar.open {
                display: flex;
            }
            .nav-bar a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
                background: rgba(255, 255, 255, 0.04);
            }
            .header-inner {
                gap: 0.6rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            h1 {
                font-size: 1.6rem;
                padding-left: 0.8rem;
            }
            .code-grid {
                grid-template-columns: 1fr;
            }
            .interact-card {
                padding: 1.2rem 1rem;
            }
            .search-section {
                padding: 1.2rem;
            }
            .search-form input {
                min-width: 140px;
            }
        }
        @media(max-width:480px) {
            .container {
                padding: 0 0.8rem;
            }
            .main-content {
                padding: 1rem 0.8rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.3rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .code-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            0% {
                opacity: 0;
                transform: translateY(12px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .tip-box {
            background: #e8f4f8;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            margin: 1.5rem 0;
            border-left: 5px solid #17a2b8;
        }
        .tip-box strong {
            color: #0f5e6b;
        }
        .warning-box {
            background: #fff3f0;
            border-left: 5px solid #dc3545;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }