:root {
            --soft-pink: #FFD6E0;
            --cloud-white: #FFF9FB;
            --light-pink: #FFB6C1;
            --medium-pink: #FF8FAB;
            --dark-pink: #FB6F92;
            --text-color: #5A3E4D;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }
        
        body {
            background-color: var(--cloud-white);
            color: var(--text-color);
            line-height: 1.6;
        }
        
        header {
            background-color: var(--soft-pink);
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        
        .logo img:hover {
            filter: drop-shadow(0 0 8px rgba(251, 111, 146, 0.4));
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 2rem;
        }
        
        nav ul li a {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            transition: all 0.3s ease;
        }
        
        nav ul li a:hover {
            background-color: var(--light-pink);
            color: white;
        }
        
        .hero {
            background: linear-gradient(135deg, var(--soft-pink) 0%, var(--cloud-white) 100%);
            padding: 4rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--dark-pink);
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        
        .paw-button {
            display: inline-block;
            background-color: var(--dark-pink);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            margin-top: 1rem;
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(251, 111, 146, 0.3);
        }
        
        .paw-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(251, 111, 146, 0.4);
            filter: brightness(1.1);
        }
        
        .paw-button::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0) 70%);
            transform: scale(0);
            transition: transform 0.5s ease;
        }
        
        .paw-button:hover::before {
            transform: scale(1);
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            padding: 3rem 2rem;
            gap: 2rem;
        }
        
        .feature-card {
            background-color: white;
            border-radius: 15px;
            padding: 1.5rem;
            width: 300px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            filter: brightness(1.02);
        }
        
        .feature-card img {
            width: 100%;
            border-radius: 12px;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }
        
        .feature-card:hover img {
            filter: drop-shadow(0 0 8px rgba(251, 111, 146, 0.3));
        }
        
        .feature-card h3 {
            color: var(--dark-pink);
            margin-bottom: 0.5rem;
        }
        
        .health-diary {
            background-color: var(--soft-pink);
            padding: 2rem;
            border-radius: 15px;
            margin: 2rem auto;
            max-width: 800px;
        }
        
        .health-diary h2 {
            text-align: center;
            margin-bottom: 1.5rem;
            color: var(--dark-pink);
        }
        
        .diary-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        
        .diary-form input, .diary-form textarea {
            padding: 0.8rem;
            border: 1px solid var(--light-pink);
            border-radius: 8px;
            background-color: white;
        }
        
        .diary-form button {
            background-color: var(--medium-pink);
            color: white;
            border: none;
            padding: 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .diary-form button:hover {
            background-color: var(--dark-pink);
            filter: brightness(1.05);
        }
        
        .chat-bot {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 80px;
            height: 80px;
            background-color: var(--dark-pink);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 5px 20px rgba(251, 111, 146, 0.4);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        
        .chat-bot:hover {
            transform: scale(1.1);
            filter: brightness(1.1);
        }
        
        .chat-bot img {
            width: 60%;
            border-radius: 50%;
        }
        
        .knowledge-cards {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem;
            padding: 2rem;
        }
        
        .knowledge-card {
            background-color: white;
            border-radius: 15px;
            width: 280px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .knowledge-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .knowledge-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 15px 15px 0 0;
            transition: all 0.3s ease;
        }
        
        .knowledge-card:hover img {
            filter: brightness(1.05);
        }
        
        .card-content {
            padding: 1.5rem;
        }
        
        .card-content h3 {
            color: var(--dark-pink);
            margin-bottom: 0.5rem;
        }
        
        .articles {
            padding: 3rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .articles h2 {
            text-align: center;
            margin-bottom: 2rem;
            color: var(--dark-pink);
        }
        
        .article-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 2rem;
        }
        
        .article-card {
            background-color: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .article-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 15px 15px 0 0;
            transition: all 0.3s ease;
        }
        
        .article-card:hover img {
            filter: brightness(1.05);
        }
        
        .article-content {
            padding: 1.5rem;
        }
        
        .article-content h3 {
            color: var(--dark-pink);
            margin-bottom: 0.5rem;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: #888;
            font-size: 0.9rem;
            margin-top: 1rem;
        }
        
        footer {
            background-color: var(--soft-pink);
            padding: 2rem;
            text-align: center;
            margin-top: 3rem;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 1.5rem;
        }
        
        .footer-links a {
            color: var(--text-color);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .footer-links a:hover {
            color: var(--dark-pink);
        }
        
        @media (max-width: 768px) {
            nav ul {
                display: none;
            }
            
            .features {
                flex-direction: column;
                align-items: center;
            }
            
            .article-list {
                grid-template-columns: 1fr;
            }
        }