* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 1400px;
            margin: 0 auto;
            padding: 10px;
        }
        a { color: #2563eb; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d4ed8; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 12px;
            margin-bottom: 2rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover { text-decoration: none; }
        .nav-primary { display: flex; gap: 1.8rem; }
        .nav-primary a {
            color: #cbd5e1;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-primary a:hover { color: white; }
        .nav-primary a::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0;
            width: 0; height: 2px;
            background: #60a5fa;
            transition: width 0.3s;
        }
        .nav-primary a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            width: 100%;
            margin-top: 1rem;
            border-top: 1px solid #475569;
            padding-top: 1rem;
        }
        .nav-mobile.active { display: flex; }
        .breadcrumb {
            background-color: #e2e8f0;
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #475569; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: 16px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1e293b;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid #3b82f6;
            padding-left: 1rem;
        }
        h2 { font-size: 2rem; color: #334155; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #e2e8f0; }
        h3 { font-size: 1.5rem; color: #475569; margin: 2rem 0 1rem; }
        h4 { font-size: 1.2rem; color: #64748b; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        .lead {
            font-size: 1.3rem;
            color: #4b5563;
            background-color: #f0f9ff;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 4px solid #3b82f6;
            margin-bottom: 2.5rem;
        }
        .highlight { background-color: #fef3c7; padding: 0.2rem 0.4rem; border-radius: 4px; font-weight: 600; }
        .figure {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .figure img {
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            border: 1px solid #e5e7eb;
        }
        .caption { font-style: italic; color: #6b7280; margin-top: 0.8rem; font-size: 0.95rem; }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: fit-content;
        }
        .sidebar h3 { color: #1e293b; margin-top: 0; }
        .widget {
            margin-bottom: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #e5e7eb;
        }
        .widget:last-child { border-bottom: none; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #4b5563; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        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, #1d4ed8);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        button:hover {
            background: linear-gradient(90deg, #1d4ed8, #1e40af);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(59, 130, 246, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .star-rating .star:hover,
        .star-rating .star.active { color: #f59e0b; }
        .comment-list { margin-top: 2rem; }
        .comment {
            background: #f9fafb;
            padding: 1.2rem;
            border-radius: 10px;
            margin-bottom: 1rem;
            border-left: 4px solid #dbeafe;
        }
        footer {
            margin-top: 4rem;
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem;
            border-radius: 16px;
            text-align: center;
        }
        friend-link {
            display: block;
            font-size: 1.1rem;
            margin: 1rem 0;
            color: #60a5fa;
        }
        .copyright { margin-top: 2rem; font-size: 0.9rem; color: #94a3b8; }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
            .nav-primary { display: none; }
            .hamburger { display: block; }
        }
        @media (max-width: 768px) {
            article, .sidebar { padding: 2rem; }
            h1 { font-size: 2.2rem; }
        }