*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --secondary: #f5a623;
            --accent: #e84c3d;
            --bg: #f4f7fb;
            --card-bg: #ffffff;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --border: #dce3ed;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --radius-sm: 8px;
            --max-width: 1200px;
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--secondary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            padding: 0 0 4px 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;
            padding: 12px 0;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #f5a623, #e84c3d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #fff;
            font-size: 1.4rem;
        }
        .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);
        }
        .nav-menu {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e8edf5;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a:focus-visible {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .nav-menu a.active {
            background: var(--secondary);
            color: var(--primary);
        }
        .breadcrumb-wrap {
            background: #eef3f9;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 4px 10px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #b0c0d0;
            font-size: 1.1rem;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        main {
            padding: 30px 0 50px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media(max-width:1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow);
        }
        @media(max-width:640px) {
            .article-body {
                padding: 20px 16px;
            }
        }
        .article-body h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 12px;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .article-body h1 i {
            color: var(--secondary);
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 44px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
            color: var(--primary);
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 10px;
            color: var(--primary-light);
        }
        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1rem;
            color: #2d3a4a;
        }
        .article-body .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }
        .article-body .meta-line i {
            margin-right: 6px;
        }
        .article-body .highlight-box {
            background: #f0f7ff;
            border-left: 4px solid var(--secondary);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
        }
        .article-body .highlight-box strong {
            color: var(--primary);
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body .featured-image {
            margin: 28px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .article-body .featured-image figcaption {
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            padding: 8px 0 0;
            font-style: italic;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 6px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a i {
            color: var(--secondary);
            font-size: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 4px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 0.9rem;
            outline: none;
            transition: border var(--transition);
            background: #f9fbfd;
        }
        .search-form input:focus {
            border-color: var(--primary-light);
            background: #fff;
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 18px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 28px 0 10px;
            padding-top: 20px;
            border-top: 2px solid var(--border);
        }
        @media(max-width:640px) {
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }
        .feedback-card {
            background: #f9fbfd;
            border-radius: var(--radius-sm);
            padding: 18px 20px;
            border: 1px solid var(--border);
        }
        .feedback-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card textarea,
        .feedback-card input[type="text"],
        .feedback-card input[type="number"] {
            width: 100%;
            padding: 10px 12px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.9rem;
            font-family: var(--font);
            resize: vertical;
            outline: none;
            transition: border var(--transition);
            background: #fff;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: var(--primary-light);
        }
        .feedback-card textarea {
            min-height: 70px;
        }
        .feedback-card .row {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .feedback-card .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .feedback-card .btn:hover {
            background: var(--primary-light);
        }
        .feedback-card .rating-stars {
            display: flex;
            gap: 4px;
            font-size: 1.3rem;
            color: #d0d8e0;
            cursor: pointer;
        }
        .feedback-card .rating-stars i.active {
            color: var(--secondary);
        }
        .feedback-card .rating-stars i:hover,
        .feedback-card .rating-stars i.active~i {
            color: #d0d8e0;
        }
        .feedback-card .rating-stars i:hover,
        .feedback-card .rating-stars i:hover~i {
            color: var(--secondary);
        }
        .site-footer {
            background: var(--primary);
            color: #d0dce8;
            padding: 36px 0 20px;
            margin-top: 40px;
        }
        .site-footer a {
            color: #b8d0e8;
        }
        .site-footer a:hover {
            color: var(--secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media(max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid ul li {
            padding: 4px 0;
        }
        .footer-grid ul li a {
            font-size: 0.9rem;
        }
        friend-link {
            display: block;
            margin-top: 18px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            font-size: 0.9rem;
            padding: 2px 0;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            font-size: 0.85rem;
            color: #90a8c0;
        }
        .copyright strong {
            color: #c0d4e8;
        }
        @media(max-width:768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 6px;
                gap: 2px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 16px;
                border-radius: 8px;
                white-space: normal;
            }
            .header-inner {
                padding: 10px 0;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .article-body h1 {
                font-size: 1.6rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
                gap: 2px 8px;
            }
            .sidebar {
                order: 2;
            }
        }
        @media(max-width:480px) {
            .container {
                padding: 0 12px;
            }
            .article-body {
                padding: 16px 12px;
            }
            .article-body .meta-line {
                flex-direction: column;
                gap: 4px;
            }
            .search-form {
                flex-wrap: wrap;
            }
            .search-form input {
                flex: 1 1 100%;
            }
            .search-form button {
                flex: 1;
                justify-content: center;
            }
        }
        .text-muted {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .mt-2 {
            margin-top: 12px;
        }
        .mb-1 {
            margin-bottom: 6px;
        }
        .d-flex {
            display: flex;
        }
        .align-center {
            align-items: center;
        }
        .gap-2 {
            gap: 8px;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .tag {
            display: inline-block;
            background: #eef3f9;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.78rem;
            color: var(--text-light);
        }