* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.65;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ed 100%);
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #2a5c9e;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #d32f2f;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2em;
            margin-bottom: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #1a472a 0%, #2d5a2d 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.4rem;
            font-weight: 900;
            letter-spacing: 1px;
            color: #ffdd40;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo span {
            color: #fff;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.15);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #1a472a;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.75rem 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background: #f0f4f8;
            padding: 1rem 0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #d32f2f;
        }
        .breadcrumb .separator {
            margin: 0 0.5rem;
            color: #888;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a472a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #d32f2f;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #2d5a2d;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #c5e1a5;
        }
        h3 {
            font-size: 1.6rem;
            color: #388e3c;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            font-weight: 500;
            color: #444;
            background: #f9f9f9;
            padding: 1.5rem;
            border-left: 4px solid #ff9800;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        strong {
            color: #1a472a;
        }
        blockquote {
            border-left: 5px solid #4caf50;
            background: #f1f8e9;
            padding: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            border-radius: 0 8px 8px 0;
        }
        .search-section {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            margin: 2.5rem 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 1.5rem auto 0;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #5c6bc0;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
        }
        .search-btn {
            background: #5c6bc0;
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #3f51b5;
        }
        .interactive-section {
            background: #f8f9fa;
            border: 1px solid #e0e0e0;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4caf50;
            outline: none;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
        }
        .btn {
            background: linear-gradient(90deg, #388e3c, #4caf50);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn:hover {
            background: linear-gradient(90deg, #2d682f, #388e3c);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin-top: 0.5rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffc107;
        }
        .featured-img {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem 0;
            border: 8px solid white;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        .widget {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
        }
        .widget:last-child {
            border-bottom: none;
        }
        .widget-title {
            font-size: 1.4rem;
            color: #1a472a;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ff9800;
        }
        .link-list a {
            display: block;
            padding: 0.8rem 1rem;
            background: #f5f5f5;
            margin-bottom: 0.6rem;
            border-radius: 6px;
            transition: all 0.3s;
        }
        .link-list a:hover {
            background: #e8f5e9;
            padding-left: 1.5rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .update-time {
            color: #666;
            font-size: 0.95rem;
            text-align: center;
            padding: 1rem;
            background: #fff8e1;
            border-radius: 8px;
        }
        footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: #ffdd40;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .friend-link {
            display: inline-block;
            background: #333;
            color: #ffdd40;
            padding: 0.6rem 1.2rem;
            margin: 0.3rem 0.5rem 0.3rem 0;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .friend-link:hover {
            background: #444;
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            font-size: 0.95rem;
            color: #999;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .content-area, .sidebar {
                padding: 1.8rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .intro {
                font-size: 1.1rem;
                padding: 1.2rem;
            }
        }
        @media (max-width: 480px) {
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 8px;
                margin-bottom: 0.5rem;
            }
            .star-rating label {
                font-size: 1.6rem;
            }
        }