* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e63946; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(45deg, #ffd700, #ffed4e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        }
        .my-logo a { background: transparent; }
        .my-logo:hover { transform: scale(1.02); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            display: block;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255,255,255,0.15);
            color: #ffd700;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding-left: 0;
            margin-bottom: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #6c757d;
        }
        main {
            flex: 1;
            padding: 2.5rem 0;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 3.2rem;
            color: #1a2980;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #26d0ce;
            padding-bottom: 0.8rem;
        }
        h2 {
            font-size: 2.3rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid #ffd700;
        }
        h3 {
            font-size: 1.8rem;
            color: #3a6fc5;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #444;
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #2c5aa0;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        strong { color: #1a2980; }
        em { font-style: italic; color: #555; }
        blockquote {
            border-left: 4px solid #26d0ce;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
        }
        .interactive-box {
            background: linear-gradient(135deg, #fdfcfb, #f5f7fa);
            border: 2px solid #d0e2ff;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
        }
        .interactive-box h3 {
            margin-top: 0;
            color: #1a2980;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interactive-box form {
            display: grid;
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #444;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.9rem;
            border: 1px solid #b0c4de;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #2c5aa0;
            box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.2);
        }
        .btn {
            background: linear-gradient(90deg, #2c5aa0, #3a6fc5);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .btn:hover {
            background: linear-gradient(90deg, #1a2980, #2c5aa0);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0,0,0,0.1);
        }
        .stars {
            display: flex;
            gap: 5px;
            direction: ltr;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        .featured-image {
            margin: 2.5rem auto;
            max-width: 900px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
            border: 1px solid #dee2e6;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f8f9fa;
            font-size: 0.95rem;
        }
        .content-link {
            color: #2c5aa0;
            border-bottom: 1px dashed #2c5aa0;
            padding-bottom: 1px;
        }
        .content-link:hover {
            border-bottom-style: solid;
            color: #e63946;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: #ffd700;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid #333;
            padding-bottom: 0.7rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #a3c4ff;
        }
        friend-link a:hover {
            color: #ffd700;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #888;
        }
        .update-time {
            background: #fff3cd;
            color: #856404;
            padding: 0.8rem;
            border-radius: 8px;
            margin: 2rem 0;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.7rem; }
            h2 { font-size: 2rem; }
            .header-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; width: 100%; }
            .main-nav { width: 100%; display: none; }
            .main-nav.active { display: block; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3.5rem; }
            article { padding: 1.8rem; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            p { font-size: 1rem; }
            .lead { font-size: 1.1rem; padding: 1.2rem; }
            .interactive-box { padding: 1.5rem; }
            .btn { width: 100%; }
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }