*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #2b3a67;
            --primary-light: #3e5a8a;
            --secondary: #e8b12c;
            --accent: #d94838;
            --bg-light: #f8f7f4;
            --bg-card: #ffffff;
            --text-dark: #1e1e24;
            --text-muted: #5a5a6a;
            --text-light: #f0f0f0;
            --border-light: #e2e0dc;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --radius-sm: 8px;
            --transition: 0.25s ease;
            --font-base: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-base);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-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;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: opacity var(--transition);
        }
        .my-logo:hover {
            opacity: 0.85;
            color: #fff;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 2rem;
        }
        .my-logo span {
            background: var(--secondary);
            color: var(--primary);
            padding: 0 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-left: 4px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.88);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            transition: background var(--transition), color var(--transition);
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: var(--secondary);
        }
        .main-nav a.active {
            background: rgba(255, 255, 255, 0.12);
            color: var(--secondary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 6px;
            color: var(--text-muted);
            font-weight: 600;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1d2b4a 100%);
            color: #fff;
            padding: 60px 0 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "🎨✏️";
            position: absolute;
            right: 20px;
            bottom: 10px;
            font-size: 6rem;
            opacity: 0.08;
            pointer-events: none;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero h1 i {
            color: var(--secondary);
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            margin: 0 auto 24px;
            opacity: 0.88;
            line-height: 1.6;
        }
        .hero-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 0.95rem;
        }
        .hero-badges span {
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 16px;
            border-radius: 30px;
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-badges i {
            color: var(--secondary);
        }
        .search-section {
            background: #fff;
            padding: 28px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .search-form {
            display: flex;
            max-width: 580px;
            margin: 0 auto;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(43, 58, 103, 0.15);
            border-color: var(--primary-light);
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 14px 18px;
            font-size: 1rem;
            outline: none;
            font-family: var(--font-base);
            background: #fff;
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0 24px;
            font-size: 1rem;
            cursor: pointer;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 48px 0;
        }
        .content-area {
            min-width: 0;
        }
        .sidebar {
            min-width: 0;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 32px;
        }
        .article-card h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
            line-height: 1.3;
        }
        .article-card h2:first-child {
            margin-top: 0;
        }
        .article-card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-light);
            margin: 28px 0 12px;
            line-height: 1.4;
        }
        .article-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 20px 0 10px;
            padding-left: 12px;
            border-left: 4px solid var(--secondary);
        }
        .article-card p {
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        .article-card p b,
        .article-card p strong {
            color: var(--primary);
        }
        .article-card ul,
        .article-card ol {
            margin: 12px 0 20px 24px;
        }
        .article-card li {
            margin-bottom: 8px;
        }
        .article-card .feature-img {
            margin: 24px 0;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            background: #f0ede8;
        }
        .article-card .feature-img img {
            border-radius: var(--radius-sm);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .article-card .feature-img figcaption {
            padding: 10px 14px;
            font-size: 0.85rem;
            color: var(--text-muted);
            background: #f8f7f4;
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: #f0ede8;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }
        .last-updated i {
            margin-right: 6px;
        }
        .tip-box {
            background: #f0f4fb;
            border-left: 5px solid var(--primary-light);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
        }
        .tip-box i {
            color: var(--primary-light);
            margin-right: 10px;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .stat-item {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 18px 14px;
            text-align: center;
            border: 1px solid var(--border-light);
        }
        .stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--secondary);
        }
        .sidebar-link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-link-list li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-link-list li:last-child {
            border-bottom: none;
        }
        .sidebar-link-list i {
            color: var(--secondary);
            width: 18px;
            font-size: 0.85rem;
        }
        .sidebar-link-list a {
            color: var(--text-dark);
            font-weight: 500;
        }
        .sidebar-link-list a:hover {
            color: var(--accent);
        }
        .feedback-section {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 32px;
        }
        .feedback-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .feedback-form label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.92rem;
        }
        .feedback-form input,
        .feedback-form textarea,
        .feedback-form select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-family: var(--font-base);
            font-size: 0.95rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            background: #fff;
            margin-bottom: 14px;
        }
        .feedback-form input:focus,
        .feedback-form textarea:focus,
        .feedback-form select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(43, 58, 103, 0.1);
        }
        .feedback-form textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-form .star-select {
            display: flex;
            gap: 6px;
            margin-bottom: 14px;
        }
        .feedback-form .star-select i {
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            transition: color var(--transition);
        }
        .feedback-form .star-select i.active,
        .feedback-form .star-select i:hover {
            color: var(--secondary);
        }
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .btn-secondary {
            background: var(--secondary);
            color: var(--primary);
        }
        .btn-secondary:hover {
            background: #d9a41e;
            color: var(--primary);
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 40px 0 24px;
            margin-top: 20px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-inner h4 {
            color: var(--secondary);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .footer-inner p,
        .footer-inner li {
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-inner ul {
            list-style: none;
            padding: 0;
        }
        .footer-inner ul li {
            margin-bottom: 6px;
        }
        .footer-inner ul li a {
            color: rgba(255, 255, 255, 0.8);
        }
        .footer-inner ul li a:hover {
            color: var(--secondary);
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            margin-top: 8px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .friend-link a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            display: inline-block;
            margin: 4px 12px 4px 0;
        }
        .friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            font-size: 0.85rem;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
        }
        .copyright a {
            color: rgba(255, 255, 255, 0.8);
        }
        .copyright a:hover {
            color: var(--secondary);
        }
        @media (max-width: 1024px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .sidebar {
                order: 2;
            }
            .content-area {
                order: 1;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(0, 0, 0, 0.2);
                border-radius: var(--radius-sm);
                padding: 12px 0;
                margin-top: 8px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 20px;
                width: 100%;
                border-radius: 0;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .article-card {
                padding: 20px 18px;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feedback-section {
                padding: 20px 18px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-card h2 {
                font-size: 1.6rem;
            }
            .article-card h3 {
                font-size: 1.2rem;
            }
            .sidebar-card {
                padding: 18px;
            }
            .breadcrumb-wrap {
                font-size: 0.78rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero {
                padding: 40px 0 32px;
            }
            .hero-badges span {
                font-size: 0.8rem;
                padding: 4px 12px;
            }
            .search-form input {
                padding: 12px 14px;
                font-size: 0.92rem;
            }
            .search-form button {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .article-card {
                padding: 16px 14px;
            }
            .feedback-section {
                padding: 16px 14px;
            }
            .stat-item .num {
                font-size: 1.4rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
        }
        .sidebar-link-list li {
            transition: transform var(--transition);
        }
        .sidebar-link-list li:hover {
            transform: translateX(4px);
        }
        .stat-item {
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        .article-card .feature-img img {
            transition: transform 0.4s ease;
        }
        .article-card .feature-img:hover img {
            transform: scale(1.01);
        }