* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #2c3e50;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            max-width: 100%;
            overflow-x: hidden;
        }
        a { color: #2980b9; text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #1a5276; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2em; margin: 1em 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .my-2 { margin-top: 2rem; margin-bottom: 2rem; }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 0.2em 0.5em; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 0.3em; }
        header { background: linear-gradient(90deg, #1a237e 0%, #283593 100%); color: white; box-shadow: 0 4px 12px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
        .breadcrumb { background: #3949ab; padding: 12px 20px; font-size: 0.9rem; }
        .breadcrumb ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; }
        .breadcrumb li { margin-right: 0.5rem; }
        .breadcrumb li:not(:last-child)::after { content: '›'; margin-left: 0.5rem; color: #bbdefb; }
        .breadcrumb a { color: #bbdefb; }
        .breadcrumb a:hover { color: white; }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #ffd700;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
            background: linear-gradient(45deg, #ffd700, #ffecb3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo:hover { transform: scale(1.05); text-decoration: none; }
        .main-nav { display: flex; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover { background: rgba(255,255,255,0.2); text-decoration: none; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        main { padding: 2rem 0; background: white; box-shadow: 0 0 30px rgba(0,0,0,0.05); border-radius: 10px; margin: 2rem auto; max-width: 1100px; }
        article { padding: 0 2rem; }
        h1 { font-size: 2.8rem; color: #1a237e; margin-bottom: 1rem; line-height: 1.2; border-bottom: 4px solid #ffd700; padding-bottom: 0.5rem; }
        h2 { font-size: 2.2rem; color: #283593; margin-top: 2.5rem; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #e0e0e0; }
        h3 { font-size: 1.8rem; color: #3949ab; margin-top: 1.8rem; margin-bottom: 0.8rem; }
        h4 { font-size: 1.4rem; color: #5c6bc0; margin-top: 1.5rem; margin-bottom: 0.6rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .update-time { font-style: italic; color: #7b8a8b; background: #f8f9fa; padding: 0.8rem; border-left: 4px solid #2980b9; margin-bottom: 2rem; }
        .featured-img {
            width: 100%;
            max-width: 900px;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
            margin: 2rem auto;
            border: 5px solid #ffd700;
        }
        .content-block {
            margin-bottom: 3rem;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 8px;
            border-left: 5px solid #3498db;
        }
        .form-section { background: #ecf0f1; padding: 2rem; border-radius: 10px; margin: 3rem 0; }
        form { display: grid; gap: 1.2rem; max-width: 600px; margin: 0 auto; }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus { border-color: #3498db; outline: none; box-shadow: 0 0 8px rgba(52,152,219,0.3); }
        button {
            background: linear-gradient(90deg, #2980b9, #3498db);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        button:hover { background: linear-gradient(90deg, #1a5276, #2980b9); transform: translateY(-3px); box-shadow: 0 7px 14px rgba(0,0,0,0.15); }
        .star-rating { display: flex; justify-content: center; gap: 0.5rem; font-size: 2rem; direction: rtl; }
        .star-rating input { display: none; }
        .star-rating label { color: #ddd; cursor: pointer; }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #ffd700; }
        footer { background: #1a237e; color: white; padding: 3rem 0 1.5rem; margin-top: 4rem; }
        friend-link {
            display: block;
            background: #283593;
            padding: 2rem;
            border-radius: 10px;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        friend-link h3 { color: #ffd700; text-align: center; margin-bottom: 1.5rem; }
        friend-link ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
        friend-link a { color: #bbdefb; display: block; padding: 0.8rem; background: rgba(255,255,255,0.05); border-radius: 5px; }
        friend-link a:hover { background: rgba(255,255,255,0.1); color: white; text-decoration: none; }
        .copyright { text-align: center; padding-top: 2rem; border-top: 1px solid #3949ab; color: #bbdefb; font-size: 0.9rem; }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { width: 100%; display: none; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 0 1rem; }
            .form-section { padding: 1.5rem; }
            friend-link ul { grid-template-columns: 1fr; }
        }
        .grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
        .flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }