*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #0f2b3d;
            --primary-light: #1a4a66;
            --accent: #f7c948;
            --accent-hover: #e6b83a;
            --bg: #f4f7fa;
            --card-bg: #ffffff;
            --text: #1e2a3a;
            --text-light: #4a5a6a;
            --border: #d0d8e0;
            --shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
            --radius: 12px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 70px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--primary);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
            height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            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;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            color: var(--accent);
        }
        .my-logo span {
            font-weight: 300;
            font-size: 0.85rem;
            opacity: 0.7;
            display: none;
        }
        @media(min-width:600px) {
            .my-logo span {
                display: inline;
            }
        }
        .nav-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--primary);
            flex-direction: column;
            padding: 16px 20px;
            gap: 4px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-menu.open {
            display: flex;
        }
        .nav-menu a {
            color: #e0e8f0;
            padding: 10px 14px;
            border-radius: 8px;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-menu a i {
            width: 20px;
            text-align: center;
            color: var(--accent);
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent);
        }
        @media(min-width:768px) {
            .nav-toggle {
                display: none;
            }
            .nav-menu {
                display: flex !important;
                position: static;
                flex-direction: row;
                padding: 0;
                box-shadow: none;
                border-top: none;
                background: transparent;
                gap: 2px;
            }
            .nav-menu a {
                padding: 8px 16px;
                font-size: 0.9rem;
            }
            .nav-menu a i {
                display: none;
            }
        }
        .breadcrumb {
            background: #e8edf3;
            padding: 12px 0;
            font-size: 0.85rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            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: "›";
            font-weight: 700;
            color: #999;
            margin-right: 6px;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        @media(min-width:992px) {
            .content-grid {
                grid-template-columns: 1fr 320px;
            }
        }
        .article-body {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
        }
        @media(min-width:768px) {
            .article-body {
                padding: 40px 36px;
            }
        }
        .article-body h1 {
            font-size: 2.2rem;
            line-height: 1.2;
            margin-bottom: 12px;
            color: var(--primary);
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .article-body h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .article-body .subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            margin-bottom: 24px;
            border-left: 4px solid var(--accent);
            padding-left: 16px;
        }
        .last-updated {
            display: inline-block;
            background: #eef3f8;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .last-updated i {
            margin-right: 6px;
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--primary);
            font-weight: 700;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 8px;
        }
        .article-body h3 {
            font-size: 1.25rem;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--primary-light);
            font-weight: 600;
        }
        .article-body h4 {
            font-size: 1.05rem;
            margin-top: 20px;
            margin-bottom: 8px;
            color: var(--text);
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 16px;
            color: var(--text);
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body strong {
            font-weight: 700;
            color: var(--primary);
        }
        .article-body .highlight-box {
            background: #f0f5fa;
            border-left: 4px solid var(--accent);
            padding: 18px 22px;
            border-radius: 8px;
            margin: 24px 0;
        }
        .article-body .highlight-box i {
            color: var(--accent);
            margin-right: 8px;
        }
        .article-body .feature-img {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article-body .feature-img img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #dce3ea;
        }
        .article-body .feature-img figcaption {
            padding: 12px 16px;
            background: #f0f4f9;
            font-size: 0.85rem;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.92rem;
            border-radius: 8px;
            overflow: hidden;
        }
        .article-body th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-body td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        .article-body tr:nth-child(even) {
            background: #f7fafc;
        }
        .article-body .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            margin: 20px 0;
            padding: 16px 20px;
            background: #f4f8fb;
            border-radius: 10px;
            border: 1px solid #e0e8f0;
        }
        .article-body .link-list-inline a {
            font-weight: 500;
            font-size: 0.92rem;
        }
        .article-body .link-list-inline a i {
            margin-right: 4px;
            font-size: 0.75rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 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(--accent);
            padding-bottom: 8px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.92rem;
            padding: 4px 0;
        }
        .sidebar-card a i {
            color: var(--accent);
            font-size: 0.7rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 20px 0 10px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: var(--font);
        }
        .search-form input:focus {
            border-color: var(--accent);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s;
            font-weight: 600;
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            margin: 32px 0 10px;
            padding-top: 20px;
            border-top: 2px solid var(--border);
        }
        @media(min-width:600px) {
            .feedback-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 10px;
            padding: 20px 22px;
            border: 1px solid #e6ecf2;
        }
        .feedback-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card h3 i {
            color: var(--accent);
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.92rem;
            font-family: var(--font);
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--accent);
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.92rem;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: var(--primary-light);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.6rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: var(--accent);
        }
        footer {
            background: var(--primary);
            color: #c8d4de;
            padding: 40px 0 20px;
            margin-top: 20px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 28px;
        }
        @media(min-width:600px) {
            .footer-inner {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .footer-col p,
        .footer-col a {
            font-size: 0.88rem;
            color: #b0c4d4;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            padding: 4px 0;
        }
        friend-link {
            display: block;
            margin-top: 12px;
            font-size: 0.88rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 4px;
            color: #b0c4d4;
        }
        friend-link a:hover {
            color: var(--accent);
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            margin-top: 12px;
            font-size: 0.82rem;
            text-align: center;
            color: #8899aa;
        }
        .copyright i {
            color: var(--accent);
        }
        @media(max-width:480px) {
            .article-body h1 {
                font-size: 1.6rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .article-body {
                padding: 18px 14px;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .content-grid {
                gap: 24px;
            }
        }
        @media(min-width:768px) and (max-width:991px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .emoji-lg {
            font-size: 1.3em;
        }
        .text-accent {
            color: var(--accent);
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .img-placeholder {
            background: linear-gradient(135deg, #1a4a66, #0f2b3d);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            min-height: 200px;
            border-radius: var(--radius);
        }
        .img-placeholder i {
            font-size: 3rem;
            opacity: 0.5;
            margin-right: 12px;
        }