* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.8;
            color: #e0e0e0;
            background: #121212;
            max-width: 100%;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 700; color: #f0a500; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2rem, 5vw, 3.5rem); margin-top: 1.5rem; }
        h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); border-bottom: 2px solid #333; padding-bottom: 0.5rem; margin-top: 3rem; }
        h3 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin-top: 2.5rem; color: #c9c9c9; }
        h4 { font-size: clamp(1.25rem, 3vw, 1.75rem); margin-top: 2rem; color: #b0b0b0; }
        p { margin-bottom: 1.5rem; font-size: 1.125rem; }
        a { color: #4dabf7; text-decoration: none; transition: color 0.3s, text-shadow 0.3s; }
        a:hover { color: #a5d8ff; text-shadow: 0 0 8px rgba(77, 171, 247, 0.5); }
        strong { color: #f8c471; font-weight: 700; }
        em { color: #d5dbdb; }
        blockquote {
            border-left: 4px solid #f0a500;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            background: rgba(240, 165, 0, 0.05);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        ul, ol { margin: 1.5rem 0 1.5rem 2rem; }
        li { margin-bottom: 0.75rem; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 3rem;
        }
        @media (min-width: 992px) {
            .main-content { grid-template-columns: 3fr 1fr; }
        }
        .site-header {
            background: #1a1a1a;
            padding: 1rem 0;
            border-bottom: 3px solid #f0a500;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.5);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: #f0a500;
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 0 2px 4px rgba(240, 165, 0, 0.3);
        }
        .my-logo:hover { color: #ffd166; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ccc;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #f0a500;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f0a500;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active { display: block; }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
                background: #252525;
                padding: 1.5rem;
                border-radius: 8px;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #999;
            margin-bottom: 1rem;
        }
        .breadcrumb a { color: #999; }
        .breadcrumb a:hover { color: #f0a500; }
        .breadcrumb span { color: #f0a500; }
        .info-card {
            background: linear-gradient(145deg, #1e1e1e, #2a2a2a);
            border: 1px solid #444;
            border-radius: 10px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.4);
            border-left: 5px solid #f0a500;
        }
        .warning-note {
            background: rgba(220, 53, 69, 0.1);
            border-left: 5px solid #dc3545;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .pro-tip {
            background: rgba(0, 123, 255, 0.1);
            border-left: 5px solid #007bff;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .key-term {
            background: #2d2d2d;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-family: monospace;
            color: #ffa94d;
        }
        .sidebar {
            background: #1e1e1e;
            border-radius: 10px;
            padding: 2rem;
            align-self: start;
            border: 1px solid #444;
        }
        .sidebar h3 { margin-top: 0; }
        .related-links { list-style: none; margin: 1.5rem 0; }
        .related-links li { margin-bottom: 1rem; padding-left: 0; }
        .related-links li::before { content: '▶'; color: #f0a500; margin-right: 0.75rem; }
        .update-time {
            font-size: 0.9rem;
            color: #aaa;
            background: #252525;
            padding: 1rem;
            border-radius: 6px;
            text-align: center;
            margin-top: 2rem;
        }
        .functional-section {
            background: #1e1e1e;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 1px solid #444;
        }
        .functional-section h2 { border: none; }
        form { display: grid; gap: 1.5rem; margin-top: 1.5rem; }
        .form-group { display: flex; flex-direction: column; }
        label { margin-bottom: 0.5rem; font-weight: 600; color: #ccc; }
        input, textarea, select {
            padding: 0.9rem 1.2rem;
            background: #2d2d2d;
            border: 1px solid #555;
            border-radius: 6px;
            color: #fff;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #f0a500;
            box-shadow: 0 0 0 3px rgba(240, 165, 0, 0.25);
        }
        button, .btn {
            background: linear-gradient(to right, #f0a500, #e67e22);
            color: #121212;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s;
            text-align: center;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #ffb732, #f39c12);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(240, 165, 0, 0.3);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #555;
            margin: 1rem 0;
        }
        .star-rating label { cursor: pointer; }
        .star-rating input { display: none; }
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #ffc107; }
        .star-rating input:checked ~ label { color: #ffc107; }
        .site-footer {
            background: #0f0f0f;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
            border-top: 3px solid #333;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-links a { color: #aaa; }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            margin: 2rem 0;
        }
        .friend-link {
            background: #252525;
            padding: 0.75rem 1.5rem;
            border-radius: 30px;
            border: 1px solid #444;
            transition: all 0.3s;
        }
        .friend-link:hover {
            background: #f0a500;
            border-color: #f0a500;
        }
        .friend-link:hover a { color: #121212; }
        .copyright {
            text-align: center;
            color: #777;
            font-size: 0.9rem;
            padding-top: 2rem;
            border-top: 1px solid #333;
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .img-container {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            border: 3px solid #444;
            box-shadow: 0 12px 30px rgba(0,0,0,0.5);
            max-width: 800px;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #aaa;
            padding: 0.75rem;
            background: #252525;
        }