* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a2a3a;
            --secondary: #c9a84c;
            --accent: #e8d48b;
            --bg: #f4f1ea;
            --card: #ffffff;
            --text: #2c2c2c;
            --text-light: #5a5a5a;
            --border: #d4c9a8;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
        }
        a {
            color: #b8860b;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #8a6508;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--primary);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--secondary);
            text-transform: uppercase;
            text-decoration: none;
        }
        .my-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 28px;
            cursor: pointer;
            padding: 4px 8px;
        }
        nav ul {
            display: flex;
            gap: 24px;
            list-style: none;
            align-items: center;
        }
        nav a {
            color: #e0d6c0;
            font-weight: 500;
            font-size: 15px;
            transition: color 0.2s;
        }
        nav a:hover {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb {
            background: #e8e0d0;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text-light);
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
            padding: 0 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: #7a6b4a;
        }
        .breadcrumb .active {
            color: var(--text);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 100%);
            color: #fff;
            padding: 48px 0 40px;
            text-align: center;
        }
        .hero h1 {
            font-size: 38px;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .hero p {
            font-size: 18px;
            max-width: 720px;
            margin: 0 auto;
            opacity: 0.9;
        }
        .hero .meta {
            margin-top: 16px;
            font-size: 14px;
            opacity: 0.7;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 36px;
            padding: 40px 0 60px;
        }
        .content {
            background: var(--card);
            padding: 36px 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: var(--card);
            padding: 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 18px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 8px;
            margin-bottom: 16px;
            color: var(--primary);
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card li {
            padding: 6px 0;
            border-bottom: 1px solid #eee;
        }
        .sidebar-card li a {
            font-size: 14px;
        }
        h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            margin: 0 0 20px 0;
            line-height: 1.3;
        }
        h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin: 40px 0 16px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 20px;
            font-weight: 600;
            color: #1f2e3e;
            margin: 28px 0 12px 0;
        }
        h4 {
            font-size: 17px;
            font-weight: 600;
            color: #2c3e50;
            margin: 20px 0 10px 0;
        }
        p {
            margin-bottom: 16px;
            text-align: justify;
        }
        .content ul,
        .content ol {
            margin: 12px 0 20px 24px;
        }
        .content li {
            margin-bottom: 8px;
        }
        .highlight {
            background: #fcf8e8;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .code-box {
            background: #1e2a36;
            color: #e8d48b;
            padding: 16px 20px;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            font-size: 15px;
            overflow-x: auto;
            margin: 16px 0 24px;
            border-left: 4px solid var(--secondary);
        }
        .feature-img {
            margin: 24px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .feature-img figcaption {
            font-size: 13px;
            color: var(--text-light);
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 15px;
            background: var(--card);
        }
        th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 10px 16px;
            border-bottom: 1px solid #e8e0d0;
        }
        tr:nth-child(even) {
            background: #faf8f4;
        }
        tr:hover {
            background: #f5efe4;
        }
        .search-box {
            background: var(--card);
            padding: 24px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 24px 0 32px;
            border: 1px solid var(--border);
        }
        .search-box form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-box input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border: 2px solid #d4c9a8;
            border-radius: 8px;
            font-size: 16px;
            outline: none;
            transition: border 0.2s;
        }
        .search-box input[type="text"]:focus {
            border-color: var(--secondary);
        }
        .search-box button,
        .comment-box button,
        .score-box button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-box button:hover,
        .comment-box button:hover,
        .score-box button:hover {
            background: #2c3e50;
            transform: translateY(-1px);
        }
        .comment-box {
            background: var(--card);
            padding: 24px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 24px 0 32px;
            border: 1px solid var(--border);
        }
        .comment-box textarea {
            width: 100%;
            min-height: 100px;
            padding: 12px 18px;
            border: 2px solid #d4c9a8;
            border-radius: 8px;
            font-size: 15px;
            font-family: inherit;
            resize: vertical;
            outline: none;
            transition: border 0.2s;
            margin-bottom: 12px;
        }
        .comment-box textarea:focus {
            border-color: var(--secondary);
        }
        .comment-box .form-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .comment-box input[type="text"] {
            flex: 1;
            min-width: 160px;
            padding: 10px 16px;
            border: 2px solid #d4c9a8;
            border-radius: 8px;
            font-size: 15px;
            outline: none;
        }
        .comment-box input[type="text"]:focus {
            border-color: var(--secondary);
        }
        .score-box {
            background: var(--card);
            padding: 24px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 24px 0 32px;
            border: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
        }
        .score-box .stars {
            display: flex;
            gap: 6px;
            font-size: 28px;
            color: #d4c9a8;
            cursor: pointer;
            transition: color 0.2s;
        }
        .score-box .stars i:hover,
        .score-box .stars i.active {
            color: #f5b342;
        }
        .score-box .stars i {
            transition: color 0.15s;
        }
        friend-link {
            display: block;
            background: var(--card);
            padding: 28px 32px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 32px 0 0;
            border: 1px solid var(--border);
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 20px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 8px;
            display: inline-block;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            margin-top: 16px;
        }
        friend-link a {
            font-size: 15px;
        }
        footer {
            background: var(--primary);
            color: #c8bfa8;
            padding: 28px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 14px;
        }
        footer a {
            color: var(--accent);
        }
        footer .copyright {
            margin-top: 8px;
            opacity: 0.7;
            font-size: 13px;
        }
        @media (max-width: 900px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .content {
                order: 1;
                padding: 24px 20px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .my-logo {
                font-size: 22px;
            }
        }
        @media (max-width: 700px) {
            .nav-toggle {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a2a3a;
                padding: 12px 0 20px;
                gap: 12px;
                margin-top: 12px;
                border-top: 1px solid #2c3e50;
            }
            nav ul.open {
                display: flex;
            }
            nav a {
                font-size: 16px;
                padding: 4px 0;
            }
            .content {
                padding: 20px 16px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .search-box form {
                flex-direction: column;
            }
            .search-box input[type="text"] {
                min-width: auto;
            }
            .score-box {
                flex-direction: column;
                align-items: flex-start;
            }
            .comment-box .form-row {
                flex-direction: column;
            }
            .comment-box input[type="text"] {
                min-width: auto;
                width: 100%;
            }
            table {
                font-size: 13px;
            }
            th,
            td {
                padding: 8px 10px;
            }
            friend-link ul {
                flex-direction: column;
                gap: 8px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero {
                padding: 32px 0 28px;
            }
            .hero h1 {
                font-size: 20px;
            }
            .main-grid {
                padding: 20px 0 40px;
            }
            .content {
                padding: 16px 12px;
            }
            h2 {
                font-size: 20px;
            }
            h3 {
                font-size: 17px;
            }
            .code-box {
                font-size: 13px;
                padding: 12px 14px;
            }
            .search-box,
            .comment-box,
            .score-box {
                padding: 16px 14px;
            }
        }