* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #2c3e50;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
        }
        h1, h2, h3, h4 { color: #1a365d; margin-bottom: 1rem; font-weight: 700; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.8rem); line-height: 1.2; text-align: center; padding-top: 1rem; }
        h2 { font-size: clamp(2rem, 4vw, 2.5rem); border-left: 5px solid #3b82f6; padding-left: 1rem; margin-top: 3rem; }
        h3 { font-size: clamp(1.5rem, 3vw, 1.9rem); color: #2563eb; margin-top: 2.5rem; }
        h4 { font-size: 1.4rem; color: #4f46e5; margin-top: 2rem; }
        p { margin-bottom: 1.5rem; font-size: 1.125rem; text-align: justify; }
        .lead { font-size: 1.3rem; font-weight: 500; color: #374151; }
        strong { color: #1e40af; }
        em { font-style: italic; color: #7c3aed; }
        a { color: #3b82f6; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d4ed8; text-decoration: underline; }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        header {
            background: linear-gradient(90deg, #1e3a8a, #3b82f6);
            color: white;
            padding: 1rem 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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #fbbf24; }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: #dbeafe;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #1e40af;
            width: 100%;
            padding: 1rem;
            margin-top: 1rem;
            border-radius: 8px;
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.95rem;
            color: #6b7280;
        }
        .breadcrumb a { color: #4b5563; }
        main { background-color: white; border-radius: 16px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); padding: 2.5rem; margin-bottom: 3rem; }
        article section { margin-bottom: 3rem; }
        .featured-img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .highlight-box {
            background: linear-gradient(120deg, #e0f2fe, #fef3c7);
            border-left: 6px solid #f59e0b;
            padding: 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 2rem 0;
        }
        blockquote {
            font-style: italic;
            border-left: 4px solid #10b981;
            padding-left: 1.5rem;
            color: #047857;
            margin: 2rem 0;
        }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.7rem; }
        .sidebar-widget {
            background: white;
            border-radius: 12px;
            padding: 1.8rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .sidebar-widget h3 { font-size: 1.4rem; margin-top: 0; }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            background: linear-gradient(90deg, #3b82f6, #1d4ed8);
            color: white;
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(59, 130, 246, 0.4);
        }
        .star-rating { display: flex; gap: 5px; margin: 1rem 0; }
        .star-rating label { cursor: pointer; font-size: 1.8rem; color: #d1d5db; }
        .star-rating input { display: none; }
        .star-rating input:checked ~ label { color: #fbbf24; }
        footer {
            background: #1e293b;
            color: #cbd5e1;
            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: 2rem;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
        }
        friend-link a {
            color: #60a5fa;
            padding: 0.3rem 0;
            display: inline-block;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #374151;
            font-size: 0.9rem;
            color: #9ca3af;
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .update-time {
            font-size: 0.9rem;
            color: #6b7280;
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #d1d5db;
        }
        .tag { display: inline-block; background-color: #dbeafe; color: #1e40af; padding: 0.3rem 0.8rem; border-radius: 50px; font-size: 0.85rem; margin-right: 0.5rem; margin-bottom: 0.5rem; }