* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            padding-bottom: 40px;
        }
        a { color: #ff4655; text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #c43844; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a1a2e, #16213e);
            color: #fff;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(to right, #ff8a00, #ff4655);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover { text-decoration: none; transform: scale(1.03); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #e6e6e6;
            font-weight: 600;
            padding: 0.5rem 0.3rem;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #ff4655;
            border-bottom-color: #ff4655;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f8ff;
            border-bottom: 1px solid #d1e3f8;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #888;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #ff4655; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin-top: 2rem;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        main article { background: #fff; border-radius: 16px; padding: 2.5rem; box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
        h1 {
            font-size: 2.8rem;
            color: #1a1a2e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #ff4655;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #16213e;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e1e8f0;
        }
        h3 {
            font-size: 1.6rem;
            color: #2d4059;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #4a5f7a;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.2rem;
            background: #f0f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #36a1d6;
            margin-bottom: 2rem;
        }
        emoji { font-size: 1.2em; margin-right: 5px; }
        .feature-box {
            background: #f9fdff;
            border: 2px solid #d4edff;
            border-radius: 12px;
            padding: 2rem;
            margin: 2.5rem 0;
        }
        .feature-title {
            font-size: 1.5rem;
            color: #1674d1;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        form { margin-top: 1rem; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #444; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #ff4655;
            box-shadow: 0 0 0 3px rgba(255, 70, 85, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #ff4655, #ff8a00);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 8px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 70, 85, 0.3);
            text-decoration: none;
            color: white;
        }
        .rating-stars { display: flex; gap: 5px; margin: 1rem 0; }
        .star { font-size: 1.8rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #ffc107; }
        .article-img {
            margin: 2.5rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 15px 25px rgba(0,0,0,0.1);
            max-width: 800px;
            border: 5px solid #fff;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f9f9f9;
            font-size: 0.95rem;
        }
        aside {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.06);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-title {
            font-size: 1.4rem;
            color: #16213e;
            padding-bottom: 0.7rem;
            margin-bottom: 1.2rem;
            border-bottom: 2px solid #ff4655;
        }
        .widget-links { list-style: none; }
        .widget-links li { margin-bottom: 0.9rem; padding-left: 1.2rem; position: relative; }
        .widget-links li::before {
            content: '▶';
            position: absolute;
            left: 0;
            color: #ff8a00;
            font-size: 0.8rem;
        }
        .update-time {
            background: #fff8e1;
            padding: 1.2rem;
            border-radius: 10px;
            border-left: 4px solid #ffb300;
            font-size: 0.95rem;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
            border-top: 5px solid #ff4655;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2.5rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-title {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #444;
        }
        friend-link {
            display: inline-block;
            background: #2d2d4a;
            color: #b3b3ff;
            padding: 0.6rem 1.2rem;
            margin: 0.3rem;
            border-radius: 6px;
            font-size: 0.9rem;
        }
        friend-link:hover {
            background: #3a3a5e;
            color: #fff;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #16213e;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
            .main-nav ul li { margin: 0.7rem 0; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .content-wrapper { gap: 1.5rem; }
            main article { padding: 1.8rem; }
        }
        .highlight { background: #fffacd; padding: 0.2rem 0.5rem; border-radius: 4px; font-weight: 600; }
        .note {
            background: #e8f4fc;
            border-left: 5px solid #36a1d6;
            padding: 1.2rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .key-points { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin: 2rem 0; }
        .point-card {
            background: #f8faff;
            border: 1px solid #d1ddff;
            border-radius: 10px;
            padding: 1.5rem;
            transition: transform 0.3s;
        }
        .point-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }