*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a3c6e;
            --primary-light: #2a5a9e;
            --secondary: #f5a623;
            --accent: #e74c3c;
            --bg: #f8f9fa;
            --card-bg: #ffffff;
            --text: #2d3436;
            --text-light: #636e72;
            --border: #dfe6e9;
            --radius: 12px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            --gradient: linear-gradient(135deg, #1a3c6e 0%, #2a5a9e 100%);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--gradient);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: opacity 0.3s;
        }
        .my-logo:hover {
            opacity: 0.85;
            color: #fff;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .my-logo i {
            font-size: 1.4rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.3s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-menu li a {
            color: rgba(255, 255, 255, 0.9);
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: all 0.3s;
            display: block;
        }
        .nav-menu li a:hover,
        .nav-menu li a.active {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            list-style: none;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-light);
        }
        .breadcrumb li+li::before {
            content: "/";
            color: var(--border);
            font-weight: 300;
        }
        .breadcrumb li a {
            color: var(--primary-light);
        }
        .breadcrumb li a:hover {
            color: var(--secondary);
        }
        .breadcrumb li:last-child {
            color: var(--text);
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-body {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 36px 40px;
            box-shadow: var(--shadow);
        }
        .article-body h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            margin-bottom: 12px;
        }
        .article-body h1 i {
            color: var(--secondary);
        }
        .meta-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 0.9rem;
            color: var(--text-light);
            padding-bottom: 20px;
            border-bottom: 2px solid var(--bg);
            margin-bottom: 28px;
        }
        .meta-bar i {
            margin-right: 6px;
            color: var(--secondary);
        }
        .meta-bar .update-badge {
            background: var(--secondary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
        }
        .article-body h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary-light);
            margin: 32px 0 12px;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 10px;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.02rem;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body .highlight-box {
            background: linear-gradient(135deg, #fef9e7, #fdebd0);
            border-left: 5px solid var(--secondary);
            padding: 20px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 24px 0;
        }
        .article-body .highlight-box strong {
            color: var(--primary);
        }
        .article-body .tip-card {
            background: #eaf7ee;
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 24px 0;
            border: 1px solid #c8e6d9;
        }
        .article-body .tip-card i {
            color: #27ae60;
            margin-right: 8px;
        }
        .featured-img-wrap {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #f0f0f0;
        }
        .featured-img-wrap img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img-wrap figcaption {
            padding: 12px 20px;
            font-size: 0.88rem;
            color: var(--text-light);
            background: #fafafa;
            border-top: 1px solid var(--border);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--secondary);
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
        }
        .sidebar-card ul li a i {
            color: var(--secondary);
            font-size: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: var(--primary-light);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 18px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .interaction-area {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 3px solid var(--border);
        }
        .interaction-area h2 {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 24px;
        }
        .comment-form,
        .rating-form {
            background: var(--bg);
            padding: 24px 28px;
            border-radius: var(--radius);
            margin-bottom: 28px;
        }
        .comment-form textarea {
            width: 100%;
            min-height: 120px;
            padding: 14px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: var(--font);
            resize: vertical;
            outline: none;
            transition: border-color 0.3s;
        }
        .comment-form textarea:focus {
            border-color: var(--primary-light);
        }
        .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 14px;
        }
        .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 10px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .form-row input:focus {
            border-color: var(--primary-light);
        }
        .form-row button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .form-row button:hover {
            background: var(--primary-light);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: var(--border);
            cursor: pointer;
            margin: 10px 0 16px;
        }
        .rating-stars i {
            transition: color 0.3s, transform 0.2s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: var(--secondary);
            transform: scale(1.15);
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.9);
            padding: 48px 0 28px;
            margin-top: 20px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-col h4 {
            color: var(--secondary);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.92rem;
            line-height: 1.6;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            padding: 4px 0;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.3s;
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        friend-link {
            display: block;
            margin-top: 12px;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            font-size: 0.9rem;
        }
        friend-link a {
            color: var(--secondary);
            font-weight: 500;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 24px;
            margin-top: 32px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                display: none;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 12px 16px;
                border-radius: 8px;
            }
            .article-body {
                padding: 20px 18px;
            }
            .article-body h1 {
                font-size: 1.6rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .meta-bar {
                flex-direction: column;
                gap: 8px;
            }
            .form-row {
                flex-direction: column;
            }
            .form-row input {
                min-width: auto;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .article-body {
                padding: 16px 14px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.1rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
                padding: 8px 14px;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: all 0.3s;
            z-index: 99;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
        }
        .scroll-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .scroll-top:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
        }