* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #6a11cb;
            --secondary: #2575fc;
            --accent: #ff4e50;
            --dark: #2d3436;
            --light: #f9f9f9;
            --gray: #636e72;
            --shadow: 0 8px 30px rgba(0,0,0,0.08);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --border-radius: 12px;
            --max-width: 1280px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.75;
            color: var(--dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            background-attachment: fixed;
            padding-top: 80px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding { padding: 60px 0; }
        .text-center { text-align: center; }
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--accent); }
        .desktop-nav { display: flex; gap: 30px; }
        .desktop-nav a {
            font-weight: 600;
            font-size: 1.05rem;
            position: relative;
            padding: 5px 0;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: var(--transition);
        }
        .desktop-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 20px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            border-top: 1px solid #eee;
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            padding: 15px 0;
            border-bottom: 1px solid #f0f0f0;
            font-weight: 600;
            font-size: 1.1rem;
        }
        .mobile-nav a:last-child { border-bottom: none; }
        .breadcrumb {
            background: rgba(255,255,255,0.7);
            padding: 15px 20px;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
            margin-bottom: 30px;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--dark); margin: 0 8px; }
        main {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin-bottom: 60px;
            position: relative;
            overflow: hidden;
        }
        main::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(106, 17, 203, 0.05) 0%, transparent 70%);
            z-index: 0;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            margin: 50px 0 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid #f0f0f0;
            color: var(--dark);
        }
        h3 { font-size: 1.8rem; margin: 40px 0 15px; color: #444; }
        h4 { font-size: 1.4rem; margin: 30px 0 10px; color: var(--gray); }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--secondary);
            background: rgba(37, 117, 252, 0.05);
            padding: 20px;
            border-left: 5px solid var(--secondary);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 40px;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(255, 78, 80, 0.15) 0%, transparent 100%);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        b, strong { color: #333; }
        em { font-style: italic; color: #555; }
        .feature-img {
            width: 100%;
            max-width: 900px;
            margin: 40px auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .feature-img:hover {
            transform: translateY(-5px);
            box-shadow: 0 25px 50px rgba(0,0,0,0.15);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .content-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .link-card {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            padding: 20px;
            border-radius: var(--border-radius);
            text-align: center;
            transition: var(--transition);
            border: 1px solid #dee2e6;
        }
        .link-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }
        .link-card i { font-size: 2rem; color: var(--primary); margin-bottom: 15px; }
        .interactive-section {
            background: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 40px;
            margin: 60px 0;
            border: 1px solid #e9ecef;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .form-box {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
        }
        .form-box h3 { margin-top: 0; }
        input, textarea, select {
            width: 100%;
            padding: 15px;
            margin: 10px 0 20px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.1);
        }
        button, .btn {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(106, 17, 203, 0.2);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
            font-size: 2rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i { transition: var(--transition); }
        .star-rating i:hover { transform: scale(1.2); }
        footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h3 {
            color: white;
            font-size: 1.5rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
        }
        .footer-links a {
            color: #b2bec3;
            display: block;
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 10px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: 8px;
            margin: 10px 0;
            border-left: 4px solid var(--accent);
        }
        friend-link a {
            color: white;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #b2bec3;
            font-size: 0.9rem;
        }
        .update-time {
            background: rgba(255,255,255,0.1);
            padding: 10px 20px;
            border-radius: 50px;
            display: inline-block;
            margin-top: 20px;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2rem; }
            .header-container { padding: 12px 15px; }
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            main { padding: 30px; }
            .section-padding { padding: 40px 0; }
        }
        @media (max-width: 768px) {
            body { padding-top: 70px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .form-grid { grid-template-columns: 1fr; }
            .content-links { grid-template-columns: 1fr; }
            .interactive-section { padding: 30px 20px; }
            .form-box { padding: 20px; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 1.9rem; }
            .lead { font-size: 1.1rem; }
            main { padding: 20px 15px; }
            .breadcrumb { font-size: 0.8rem; padding: 10px; }
        }