* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #1e40af;
            --secondary: #dc2626;
            --accent: #fbbf24;
            --dark: #1f2937;
            --light: #f3f4f6;
            --text: #374151;
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: #ffffff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 20px; }
        .site-header {
            background: linear-gradient(135deg, var(--primary), #1e3a8a);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(90deg, #fff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a { color: var(--dark); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .separator { margin: 0 0.5rem; color: #9ca3af; }
        .hero {
            background: linear-gradient(rgba(30, 64, 175, 0.85), rgba(220, 38, 38, 0.8)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
            padding: 4rem 2rem;
            border-radius: 0 0 20px 20px;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .content-section {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #e5e7eb;
        }
        h2 {
            color: var(--primary);
            font-size: 2.2rem;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent);
        }
        h3 {
            color: var(--dark);
            font-size: 1.7rem;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            color: var(--secondary);
            font-size: 1.3rem;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fef3c7;
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #6b7280;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .function-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .search-box, .comment-box, .rating-box {
            background: var(--light);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .function-box h3 { border-bottom: none; margin-top: 0; }
        .function-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .function-box input,
        .function-box textarea,
        .function-box select {
            padding: 0.8rem;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-family: inherit;
        }
        .function-box button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .function-box button:hover {
            background-color: var(--secondary);
            transform: translateY(-2px);
        }
        .related-links {
            background-color: #eff6ff;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .related-links h3 { color: var(--primary); }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }
        .link-grid a {
            display: block;
            padding: 0.8rem 1rem;
            background-color: white;
            border-left: 4px solid var(--primary);
            border-radius: 4px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .link-grid a:hover {
            border-left-color: var(--secondary);
            transform: translateX(5px);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: var(--accent);
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .friend-links {
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 8px;
        }
        .friend-links a {
            color: #93c5fd;
            display: block;
            margin-bottom: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4b5563;
            font-size: 0.9rem;
            color: #9ca3af;
        }
        @media (max-width: 992px) {
            .hero h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                flex-direction: column;
                padding: 1rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hero { padding: 3rem 1rem; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1.1rem; }
            .function-box { grid-template-columns: 1fr; }
            .header-inner { padding: 0 1rem; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .emoji { font-size: 1.2em; }
        .bold { font-weight: 700; color: var(--dark); }
        .last-updated {
            font-size: 0.9rem;
            color: #6b7280;
            text-align: right;
            margin-top: 1rem;
            font-style: italic;
        }