:root {
            --primary: #1565c0;
            --primary-dark: #0d47a1;
            --accent: #ff6f00;
            --bg: #f4f8fb;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --radius: 14px;
            --shadow: 0 4px 20px rgba(0, 0, 0, .08);
            --transition: all .3s ease;
        }
        * {
            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;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0d47a1, #1565c0, #42a5f5);
            color: #fff;
            padding: 18px 0;
            box-shadow: 0 2px 15px rgba(0, 0, 0, .15);
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .header-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            color: #fff !important;
            text-decoration: none;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, .3);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            font-size: 32px;
            color: #ffca28;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 18px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e3f2fd;
            font-weight: 600;
            font-size: 15px;
            padding: 6px 14px;
            border-radius: 20px;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 26px;
            cursor: pointer;
        }
        .breadcrumb {
            background: #e8f0fe;
            padding: 10px 0;
            font-size: 14px;
            border-bottom: 1px solid #d4e3f7;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }
        .breadcrumb span {
            color: var(--text-light);
        }
        .main-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 35px;
            padding: 35px 0;
        }
        article {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 30px;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .widget {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 22px;
        }
        .widget h3 {
            font-size: 18px;
            color: var(--primary-dark);
            margin-bottom: 12px;
            border-bottom: 2px solid #e3f2fd;
            padding-bottom: 8px;
        }
        h1 {
            font-size: 32px;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        h2 {
            font-size: 24px;
            color: var(--primary-dark);
            margin: 35px 0 15px;
            padding-left: 12px;
            border-left: 4px solid var(--accent);
        }
        h3 {
            font-size: 19px;
            color: #333;
            margin: 25px 0 10px;
        }
        h4 {
            font-size: 16px;
            color: var(--primary);
            margin: 18px 0 8px;
        }
        p {
            margin-bottom: 14px;
            text-align: justify;
        }
        .meta-info {
            display: flex;
            gap: 15px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 20px;
            flex-wrap: wrap;
            border-bottom: 1px solid #eee;
            padding-bottom: 12px;
        }
        .content-img {
            width: 100%;
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        blockquote {
            background: #f0f7ff;
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 10px 10px 0;
            margin: 20px 0;
            font-style: italic;
            color: #333;
        }
        ul,
        ol {
            margin-left: 20px;
            margin-bottom: 14px;
        }
        li {
            margin-bottom: 5px;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff8e1, #fff3c4);
            border-radius: 10px;
            padding: 18px 22px;
            margin: 20px 0;
            border: 1px solid #ffe082;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
            margin: 20px 0;
        }
        .stat-card {
            background: #f8f9fc;
            border-radius: 10px;
            padding: 20px 15px;
            text-align: center;
            border-top: 3px solid var(--primary);
        }
        .stat-card .num {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary-dark);
        }
        .stat-card .label {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 4px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 5px;
            font-size: 14px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 15px;
            transition: var(--transition);
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(21, 101, 192, .1);
        }
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border: none;
            border-radius: 25px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            background: var(--primary);
            color: #fff;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(13, 71, 161, .3);
        }
        footer {
            background: #0d1b2a;
            color: #a8b2c1;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        footer friend-link {
            display: block;
            font-size: 15px;
            line-height: 2;
        }
        footer friend-link a {
            color: #90caf9;
        }
        footer friend-link a:hover {
            color: #fff;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid #1e3a5f;
            padding-top: 20px;
            margin-top: 30px;
            font-size: 14px;
        }
        .copyright p {
            text-align: center;
            margin-bottom: 4px;
        }
        @media (max-width: 992px) {
            .main-wrap {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                margin-top: 12px;
                gap: 8px;
                background: rgba(0, 0, 0, .15);
                padding: 12px;
                border-radius: 10px;
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-menu a {
                padding: 8px 12px;
            }
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 20px;
            }
            article {
                padding: 18px;
            }
            .container {
                padding: 0 14px;
            }
        }
        @media (max-width: 400px) {
            .my-logo {
                font-size: 20px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
        }