:root {
            --primary: #1a2a4a;
            --secondary: #e8a832;
            --accent: #d4af37;
            --bg: #f4f0e8;
            --text: #2c2c2c;
            --text-light: #6b7280;
            --white: #ffffff;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
            --radius: 12px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--secondary);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0d1b3e, #1a2a4a);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .header-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 30px;
            font-weight: 900;
            color: var(--white);
            letter-spacing: 1px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo span {
            font-size: 16px;
            display: block;
            color: #aab;
            -webkit-text-fill-color: #aab;
            font-weight: 400;
            letter-spacing: 2px;
        }
        .main-nav {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .main-nav a {
            color: #ccd;
            padding: 8px 12px;
            border-radius: 6px;
            font-weight: 500;
            font-size: 14px;
        }
        .main-nav a:hover {
            color: var(--secondary);
            background: rgba(255, 255, 255, 0.05);
        }
        .burger-btn {
            display: none;
            background: transparent;
            border: none;
            color: var(--white);
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }
        .breadcrumb {
            padding: 14px 0;
            font-size: 13px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            margin: 0 6px;
            font-size: 10px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding: 30px 0 60px;
        }
        .main-article {
            background: var(--white);
            border-radius: var(--radius);
            padding: 35px 40px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-widget {
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 18px;
            margin-bottom: 14px;
            color: var(--primary);
            border-left: 4px solid var(--secondary);
            padding-left: 12px;
        }
        .sidebar-widget ul {
            list-style: none;
        }
        .sidebar-widget ul li {
            margin-bottom: 8px;
            padding: 6px 0;
            border-bottom: 1px solid #f0eee8;
            font-size: 14px;
        }
        .sidebar-widget ul li a {
            color: var(--text);
            font-weight: 500;
        }
        .main-article h1 {
            font-size: 36px;
            line-height: 1.2;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .main-article .meta {
            color: var(--text-light);
            font-size: 14px;
            margin-bottom: 20px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .main-article .meta i {
            margin-right: 4px;
        }
        .main-article h2 {
            font-size: 28px;
            color: var(--primary);
            margin: 40px 0 16px;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 6px;
        }
        .main-article h3 {
            font-size: 22px;
            color: #2a3a5a;
            margin: 30px 0 12px;
        }
        .main-article h4 {
            font-size: 18px;
            color: #3a4a6a;
            margin: 22px 0 10px;
        }
        .main-article p {
            margin-bottom: 16px;
        }
        .main-article ul,
        .main-article ol {
            margin: 12px 0 18px 24px;
        }
        .main-article li {
            margin-bottom: 6px;
        }
        .highlight-box {
            background: #fffbea;
            border: 1px solid #eee3c8;
            border-radius: 8px;
            padding: 20px;
            margin: 24px 0;
            border-left: 4px solid var(--secondary);
        }
        .tip-box {
            background: #eef7ff;
            border-radius: 8px;
            padding: 18px;
            margin: 20px 0;
            border-left: 4px solid #4a9ff5;
        }
        .article-image {
            width: 100%;
            border-radius: 10px;
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }
        th {
            background: var(--primary);
            color: var(--white);
            padding: 12px;
            text-align: left;
        }
        td {
            padding: 10px;
            border-bottom: 1px solid #eee;
        }
        tr:nth-child(even) {
            background: #f8f7f4;
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary);
            color: white;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            z-index: 99;
            border: none;
            font-size: 18px;
            transition: background 0.3s;
        }
        .scroll-top:hover {
            background: var(--secondary);
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 14px;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-family: inherit;
            font-size: 14px;
            background: #fafafa;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--secondary);
            background: white;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            transition: background 0.3s;
        }
        .btn:hover {
            background: var(--secondary);
            color: var(--primary);
        }
        .search-box {
            display: flex;
            gap: 10px;
        }
        .search-box input {
            flex: 1;
        }
        .site-footer {
            background: #0d1b3e;
            color: #aab;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-wrap {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .site-footer h4 {
            color: var(--white);
            font-size: 18px;
            margin-bottom: 16px;
        }
        .site-footer a {
            color: #aab;
            font-size: 14px;
            display: block;
            margin-bottom: 8px;
        }
        .site-footer a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a3a5a;
            font-size: 14px;
            color: #8899aa;
        }
        friend-link {
            display: block;
            border-top: 1px solid #2a3a5a;
            padding: 20px 0;
            text-align: center;
            font-size: 14px;
        }
        friend-link a {
            color: var(--secondary);
            margin: 0 10px;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 15px;
                gap: 5px;
                order: 3;
            }
            .main-nav.open {
                display: flex;
            }
            .burger-btn {
                display: block;
            }
            .content-grid {
                grid-template-columns: 1fr;
                padding: 20px 0;
            }
            .main-article {
                padding: 20px;
            }
            .main-article h1 {
                font-size: 28px;
            }
            .main-article h2 {
                font-size: 24px;
            }
            .main-article h3 {
                font-size: 20px;
            }
            .header-wrap {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            .main-article {
                padding: 16px;
            }
            body {
                font-size: 15px;
            }
        }