* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2a4365;
            --secondary: #c53030;
            --accent: #ecc94b;
            --light: #f7fafc;
            --dark: #1a202c;
            --gray: #718096;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary), #1a365d);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--accent);
            text-shadow: 2px 2px 0 var(--secondary);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .main-nav {
            display: flex;
            gap: 1.5rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 5px;
            position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 5px;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                flex-direction: column;
                align-items: center;
                padding: 1.5rem 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: var(--transition);
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav a {
                width: 90%;
                text-align: center;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
        }
        .hero {
            text-align: center;
            padding: 3rem 1rem;
            background: linear-gradient(rgba(42, 67, 101, 0.9), rgba(42, 67, 101, 0.95)), url('https://images.unsplash.com/photo-1538481199705-c710c4e965fc?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .search-box {
            max-width: 600px;
            margin: 2.5rem auto 0;
            display: flex;
        }
        .search-box input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
        }
        .search-box button {
            background-color: var(--accent);
            color: var(--dark);
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 1rem 1.8rem;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #f6ad55;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
        }
        article > * + * {
            margin-top: 1.8rem;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--secondary);
            font-size: 2rem;
            margin-top: 2.5rem;
            padding-left: 1rem;
            border-left: 6px solid var(--primary);
        }
        h3 {
            color: var(--primary);
            font-size: 1.6rem;
            margin-top: 2rem;
        }
        h4 {
            color: var(--dark);
            font-size: 1.3rem;
            margin-top: 1.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background-color: #f0fff4;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 5px solid #38a169;
        }
        .highlight {
            background-color: #fffaf0;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 5px solid var(--accent);
            margin: 2rem 0;
        }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .feature-img figcaption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: 0.8rem;
            background-color: #f8f9fa;
        }
        .key-points {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .point-card {
            background: linear-gradient(145deg, #ffffff, #f0f4f8);
            border-radius: 10px;
            padding: 1.8rem;
            box-shadow: 5px 5px 15px #d9d9d9, -5px -5px 15px #ffffff;
            transition: var(--transition);
        }
        .point-card:hover {
            transform: translateY(-10px);
            box-shadow: 10px 10px 20px #d9d9d9, -10px -10px 20px #ffffff;
        }
        .point-card i {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .quote {
            font-style: italic;
            font-size: 1.3rem;
            color: var(--primary);
            text-align: center;
            padding: 2.5rem;
            background-color: #e6fffa;
            border-radius: 12px;
            margin: 3rem 0;
            position: relative;
        }
        .quote::before, .quote::after {
            content: '"';
            font-size: 4rem;
            color: var(--accent);
            position: absolute;
            opacity: 0.5;
        }
        .quote::before {
            top: 10px;
            left: 20px;
        }
        .quote::after {
            bottom: 10px;
            right: 20px;
        }
        .content-link {
            color: var(--secondary);
            font-weight: 600;
            border-bottom: 2px dotted var(--secondary);
        }
        .content-link:hover {
            color: var(--primary);
            border-bottom-style: solid;
        }
        .update-time {
            background-color: #ebf8ff;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            font-weight: bold;
            color: var(--primary);
            margin: 2rem 0;
        }
        aside {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        .interactive-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating {
            display: flex;
            justify-content: space-between;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            margin-top: 0.5rem;
        }
        .rating span {
            transition: var(--transition);
        }
        .rating span:hover,
        .rating span.active {
            color: var(--accent);
        }
        .rating span:hover ~ span {
            color: var(--accent);
        }
        .btn-submit {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-submit:hover {
            background-color: var(--secondary);
        }
        .site-footer {
            background-color: var(--dark);
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
            text-align: center;
        }
        friend-link a {
            color: #90cdf4;
        }
        friend-link a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }