* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8fafc;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 800; color: #1e293b; margin-bottom: 1rem; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); line-height: 1.2; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); border-left: 5px solid #3b82f6; padding-left: 1rem; margin-top: 3rem; }
        h3 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2rem; color: #475569; }
        h4 { font-size: 1.25rem; margin-top: 1.5rem; color: #64748b; }
        p, li { margin-bottom: 1.25rem; font-size: 1.125rem; color: #475569; }
        a { color: #2563eb; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1d4ed8; text-decoration: underline; }
        strong { color: #1e293b; font-weight: 700; }
        em { font-style: italic; }
        blockquote {
            border-left: 4px solid #94a3b8;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #64748b;
            background: #f1f5f9;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        hr {
            border: none;
            height: 2px;
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            margin: 3rem 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
            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;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #60a5fa;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover { color: #93c5fd; text-decoration: none; }
        .my-logo i { font-size: 2.5rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #cbd5e1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: white; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #60a5fa;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                right: -100%;
                background: #1e293b;
                width: 80%;
                height: calc(100vh - 70px);
                transition: right 0.4s ease;
                padding: 2rem;
                box-shadow: -5px 0 15px rgba(0,0,0,0.2);
                overflow-y: auto;
            }
            .main-nav.active { right: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            .main-nav a { font-size: 1.2rem; }
        }
        .breadcrumbs {
            padding: 1rem 0;
            background: #f1f5f9;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumbs ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumbs li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: #94a3b8;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 16px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.05);
        }
        .interactive-box {
            background: #e0f2fe;
            border-radius: 12px;
            padding: 2rem;
            margin: 2.5rem 0;
            border-left: 6px solid #0284c7;
        }
        .interactive-box h3 { margin-top: 0; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #0c4a6e;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease, box-shadow 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        button {
            background: linear-gradient(90deg, #3b82f6, #2563eb);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
        }
        button:hover {
            background: linear-gradient(90deg, #2563eb, #1d4ed8);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(37, 99, 235, 0.3);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #cbd5e1;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #fbbf24; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.8rem;
            margin-bottom: 1.2rem;
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 0.9rem;
            padding-bottom: 0.9rem;
            border-bottom: 1px dashed #e2e8f0;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .link-list i { color: #3b82f6; width: 20px; }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            position: relative;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 1rem;
            background: #f8fafc;
            color: #64748b;
            font-size: 0.95rem;
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #f0f9ff, #e0f2fe);
            padding: 1.8rem;
            border-radius: 12px;
            text-align: center;
            border: 1px solid #bae6fd;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(186, 230, 253, 0.5);
        }
        .stat-card .number {
            font-size: 3rem;
            font-weight: 900;
            color: #0369a1;
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-card .label {
            font-size: 1rem;
            color: #0c4a6e;
            font-weight: 600;
        }
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            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: 1.8rem;
            font-weight: 900;
            color: #60a5fa;
            margin-bottom: 1rem;
        }
        .footer-nav ul {
            list-style: none;
        }
        .footer-nav li { margin-bottom: 0.8rem; }
        .footer-nav a { color: #cbd5e1; }
        .footer-nav a:hover { color: white; }
        friend-link {
            display: block;
            background: #334155;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            text-align: center;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #475569;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .update-time {
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
            background: #dcfce7;
            color: #166534;
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            margin-bottom: 2rem;
        }
        .text-center { text-align: center; }
        .mt-4 { margin-top: 2rem; }
        .mb-4 { margin-bottom: 2rem; }
        .highlight { background: #fef3c7; padding: 0.2rem 0.5rem; border-radius: 4px; }