*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #F5F0E8;
            color: #2C1810;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #8B4513;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #C9A96E;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            background: linear-gradient(135deg, #2C1810 0%, #5C2E1A 100%);
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px 20px;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            color: #F5F0E8;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
            transition: opacity 0.3s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
            color: #C9A96E;
        }
        .my-logo span {
            color: #C9A96E;
        }
        .nav-toggle {
            display: none;
        }
        .nav-btn {
            display: none;
            font-size: 1.6rem;
            color: #F5F0E8;
            cursor: pointer;
            padding: 6px 10px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            background: transparent;
            transition: background 0.3s;
        }
        .nav-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            list-style: none;
            align-items: center;
        }
        .nav-menu a {
            color: #F5F0E8;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: border-color 0.3s, color 0.3s;
        }
        .nav-menu a:hover {
            border-bottom-color: #C9A96E;
            color: #C9A96E;
            text-decoration: none;
        }
        .breadcrumb {
            background: #E8DDD0;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #D4C4B0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: #8B4513;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #5C2E1A;
        }
        .breadcrumb .current {
            color: #8B4513;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 920px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #2C1810;
            margin-bottom: 12px;
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #3D1F0E;
            margin-top: 48px;
            margin-bottom: 18px;
            padding-bottom: 8px;
            border-bottom: 3px solid #C9A96E;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #5C2E1A;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #7A3D1F;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 16px;
            font-size: 1.05rem;
            color: #2C1810;
        }
        .article-body strong {
            color: #3D1F0E;
            font-weight: 700;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 28px;
        }
        .article-body li {
            margin-bottom: 8px;
            font-size: 1.02rem;
        }
        .article-body .feature-img {
            margin: 28px 0 20px;
            border-radius: 14px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }
        .article-body .feature-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .article-body .feature-img figcaption {
            font-size: 0.9rem;
            color: #6B5A4A;
            margin-top: 8px;
            font-style: italic;
            text-align: center;
        }
        .last-updated {
            display: inline-block;
            background: #E8DDD0;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #5C2E1A;
            margin-bottom: 20px;
            border: 1px solid #D4C4B0;
        }
        .last-updated i {
            margin-right: 6px;
            color: #8B4513;
        }
        .sidebar {
            background: #FCF9F5;
            border-radius: 16px;
            padding: 28px 22px;
            border: 1px solid #E8DDD0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 110px;
            align-self: start;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #2C1810;
            margin-bottom: 16px;
            border-left: 4px solid #C9A96E;
            padding-left: 12px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 10px;
            border-bottom: 1px dashed #E8DDD0;
            padding-bottom: 10px;
        }
        .sidebar li a {
            color: #5C2E1A;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar li a:hover {
            color: #8B4513;
        }
        .sidebar li a i {
            color: #C9A96E;
            font-size: 0.85rem;
            width: 18px;
        }
        .form-section {
            background: #FCF9F5;
            border-radius: 16px;
            padding: 28px 24px;
            margin-top: 40px;
            border: 1px solid #E8DDD0;
        }
        .form-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #2C1810;
            margin-bottom: 18px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 4px;
            color: #3D1F0E;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #D4C4B0;
            border-radius: 10px;
            font-size: 1rem;
            background: #FFFFFF;
            transition: border-color 0.3s, box-shadow 0.3s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #C9A96E;
            box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.25);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            background: #8B4513;
            color: #FFF;
        }
        .btn:hover {
            background: #5C2E1A;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(139, 69, 19, 0.3);
        }
        .btn-secondary {
            background: #C9A96E;
            color: #2C1810;
        }
        .btn-secondary:hover {
            background: #B8955A;
            box-shadow: 0 6px 20px rgba(201, 169, 110, 0.3);
        }
        .rating-stars {
            display: flex;
            gap: 8px;
            font-size: 1.8rem;
            color: #D4C4B0;
            cursor: pointer;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #C9A96E;
        }
        .site-footer {
            background: #2C1810;
            color: #E8DDD0;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px 40px;
        }
        @media (max-width: 640px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .site-footer h4 {
            color: #C9A96E;
            font-size: 1.1rem;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .site-footer a {
            color: #D4C4B0;
        }
        .site-footer a:hover {
            color: #C9A96E;
        }
        .friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            list-style: none;
            padding: 0;
        }
        .friend-link li a {
            background: rgba(255, 255, 255, 0.06);
            padding: 6px 16px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            transition: background 0.3s;
        }
        .friend-link li a:hover {
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
        }
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: #A09080;
        }
        @media (max-width: 768px) {
            .nav-btn {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 0 8px;
                gap: 4px;
            }
            .nav-menu a {
                display: block;
                padding: 10px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-toggle:checked~.nav-menu {
                display: flex;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .container {
                padding: 0 16px;
            }
            .sidebar {
                position: static;
                margin-top: 32px;
            }
            .content-grid {
                gap: 20px;
            }
        }
        @media (max-width: 480px) {
            .article-body h1 {
                font-size: 1.5rem;
            }
            .article-body p {
                font-size: 0.98rem;
            }
            .form-section {
                padding: 20px 16px;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .highlight-box {
            background: #F0E8DC;
            border-left: 5px solid #C9A96E;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box p {
            margin-bottom: 0;
        }
        .highlight-box strong {
            color: #5C2E1A;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0 28px;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.98rem;
        }
        .table-wrap th,
        .table-wrap td {
            padding: 12px 16px;
            border: 1px solid #D4C4B0;
            text-align: left;
        }
        .table-wrap th {
            background: #2C1810;
            color: #F5F0E8;
            font-weight: 600;
        }
        .table-wrap tr:nth-child(even) {
            background: #F8F4EE;
        }
        .author-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #E8DDD0;
            padding: 4px 16px 4px 12px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #3D1F0E;
            margin-bottom: 16px;
        }
        .author-tag i {
            color: #8B4513;
        }