* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: #00dbff;
            text-decoration: none;
            background: linear-gradient(90deg, #00dbff, #00ff9d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -1px;
        }
        .logo a:hover {
            opacity: 0.9;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: #e0e0e0;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            transition: color 0.3s, transform 0.2s;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-links a:hover {
            color: #00dbff;
            transform: translateY(-2px);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #00dbff;
            transition: width 0.3s;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background: #2d3748;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #a0aec0;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #00dbff;
        }
        .breadcrumb span {
            color: #718096;
            margin: 0 0.5rem;
        }
        main {
            padding: 2.5rem 0;
            background: white;
        }
        article {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 3rem;
            color: #1a202c;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            background: linear-gradient(90deg, #1a1a2e, #00dbff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        h2 {
            font-size: 2.2rem;
            color: #2d3748;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #00dbff;
        }
        h3 {
            font-size: 1.7rem;
            color: #4a5568;
            margin: 2.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            color: #2d3748;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #e0f7fa 0%, #bbdefb 100%);
            border-left: 5px solid #00dbff;
            padding: 1.8rem;
            margin: 2.5rem 0;
            border-radius: 0 10px 10px 0;
            box-shadow: 0 5px 15px rgba(0,219,255,0.08);
        }
        .tip-box {
            background: #fff8e1;
            border: 2px dashed #ffb300;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 10px;
        }
        .tip-box i {
            color: #ff9800;
            margin-right: 0.8rem;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .feature-card {
            background: #f8fdff;
            border: 1px solid #c5e3ff;
            border-radius: 12px;
            padding: 1.8rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,123,255,0.12);
        }
        .feature-card i {
            font-size: 2.5rem;
            color: #00dbff;
            margin-bottom: 1rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .stat {
            text-align: center;
            padding: 1.5rem;
            background: #1a1a2e;
            color: white;
            border-radius: 12px;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: #00ff9d;
            display: block;
        }
        .image-container {
            margin: 3rem auto;
            text-align: center;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            max-width: 900px;
        }
        .image-container img {
            width: 100%;
            transition: transform 0.5s;
        }
        .image-container:hover img {
            transform: scale(1.03);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .form-section {
            background: #f1f8ff;
            padding: 2.5rem;
            border-radius: 15px;
            margin: 4rem 0;
        }
        .form-title {
            color: #1a1a2e;
            margin-bottom: 1.8rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2d3748;
        }
        input, textarea, select {
            width: 100%;
            padding: 1rem;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00dbff;
            box-shadow: 0 0 0 3px rgba(0,219,255,0.2);
        }
        .rating {
            display: flex;
            gap: 0.8rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2.2rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffb300;
        }
        .btn {
            background: linear-gradient(135deg, #00dbff 0%, #0099cc 100%);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            box-shadow: 0 6px 20px rgba(0,219,255,0.3);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0,219,255,0.5);
            background: linear-gradient(135deg, #00ccee 0%, #0088aa 100%);
        }
        .longtail-links {
            background: #2d3748;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-link {
            display: inline-block;
            margin: 0.8rem 1.5rem;
        }
        .web-link a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 1.05rem;
            padding: 0.6rem 1.2rem;
            border: 1px solid #4a5568;
            border-radius: 50px;
            transition: all 0.3s;
        }
        .web-link a:hover {
            color: #00dbff;
            border-color: #00dbff;
            background: rgba(0,219,255,0.05);
        }
        footer {
            background: #1a1a2e;
            color: #cbd5e0;
            padding: 3rem 0;
            text-align: center;
        }
        .footer-content {
            max-width: 800px;
            margin: 0 auto;
        }
        .copyright {
            margin-top: 2rem;
            font-size: 0.95rem;
            color: #8a9bb2;
            border-top: 1px solid #2d3748;
            padding-top: 2rem;
        }
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav-links {
                gap: 1.2rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: 0;
                background: #1a1a2e;
                flex-direction: column;
                width: 100%;
                padding: 2rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
                box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            }
            .nav-links.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            .feature-list, .stats-grid {
                grid-template-columns: 1fr;
            }
            .form-section {
                padding: 1.8rem;
            }
        }