*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --secondary: #e8b830;
            --accent: #d94a2a;
            --bg-light: #f7f5f0;
            --bg-card: #ffffff;
            --text-dark: #1e1e1e;
            --text-mid: #3a3a3a;
            --text-light: #6a6a6a;
            --border: #dcd6cc;
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.14);
            --radius: 12px;
            --radius-sm: 6px;
            --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--primary);
            color: #fff;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.2rem;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 1.8rem;
        }
        .my-logo span {
            background: linear-gradient(135deg, var(--secondary), #f5d742);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo small {
            font-size: 0.5rem;
            font-weight: 400;
            letter-spacing: 1px;
            color: rgba(255, 255, 255, 0.6);
            -webkit-text-fill-color: rgba(255, 255, 255, 0.6);
            display: block;
            line-height: 1;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.6rem;
            align-items: center;
            padding: 0;
        }
        .nav-list a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.92rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition);
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px 2px;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }
        .mobile-nav-overlay.open {
            display: block;
        }
        .mobile-nav {
            position: fixed;
            top: var(--header-height);
            right: 0;
            width: 280px;
            max-width: 80vw;
            height: calc(100vh - var(--header-height));
            background: var(--primary);
            padding: 1.6rem 1.2rem;
            transform: translateX(100%);
            transition: transform 0.35s ease;
            z-index: 1001;
            overflow-y: auto;
        }
        .mobile-nav.open {
            transform: translateX(0);
        }
        .mobile-nav ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .mobile-nav a {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: block;
        }
        .mobile-nav a:hover {
            color: var(--secondary);
        }
        .breadcrumb-wrap {
            max-width: var(--max-width);
            margin: 1rem auto 0;
            padding: 0 1.2rem;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb-wrap ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            gap: 0.4rem 0.6rem;
        }
        .breadcrumb-wrap li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: var(--text-light);
        }
        .breadcrumb-wrap a {
            color: var(--primary-light);
        }
        .breadcrumb-wrap .current {
            color: var(--text-mid);
            font-weight: 500;
        }
        .main-wrap {
            max-width: var(--max-width);
            margin: 1.2rem auto 2rem;
            padding: 0 1.2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.4rem;
        }
        .content-area {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 2.2rem;
            box-shadow: var(--shadow);
        }
        .sidebar-area {
            display: flex;
            flex-direction: column;
            gap: 1.6rem;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.4rem 1.6rem;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            color: var(--primary);
            margin-bottom: 0.8rem;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px dashed var(--border);
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 2.4rem;
            margin-bottom: 0.8rem;
            padding-bottom: 0.3rem;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 1.8rem;
            margin-bottom: 0.5rem;
        }
        h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-mid);
            margin-top: 1.2rem;
            margin-bottom: 0.3rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-mid);
        }
        .lead {
            font-size: 1.15rem;
            font-weight: 400;
            color: var(--text-dark);
            background: var(--bg-light);
            padding: 1rem 1.4rem;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--secondary);
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 4px solid var(--secondary);
            padding: 1rem 1.4rem;
            border-radius: var(--radius-sm);
            margin: 1.2rem 0;
        }
        .highlight-box strong {
            color: var(--primary);
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
            margin: 1.4rem 0;
        }
        .stat-item {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 1rem;
            text-align: center;
            border: 1px solid var(--border);
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-light);
            font-weight: 500;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        th,
        td {
            padding: 0.6rem 0.8rem;
            border: 1px solid var(--border);
            text-align: left;
        }
        th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background: #f9f7f2;
        }
        .feature-image {
            margin: 1.6rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .feature-image img {
            width: 100%;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: var(--text-light);
            background: var(--bg-light);
            font-style: italic;
        }
        .interaction-section {
            margin-top: 2.4rem;
            padding-top: 1.6rem;
            border-top: 2px solid var(--border);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin-top: 1rem;
        }
        .interaction-card {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 1.2rem 1.4rem;
            border: 1px solid var(--border);
        }
        .interaction-card h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--primary);
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            margin-top: 0.4rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.5rem 0.8rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-family: inherit;
            font-size: 0.92rem;
            background: #fff;
        }
        .interaction-card textarea {
            min-height: 60px;
            resize: vertical;
        }
        .interaction-card .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-weight: 600;
            font-size: 0.92rem;
            transition: background var(--transition);
            align-self: flex-start;
        }
        .interaction-card .btn:hover {
            background: var(--primary-light);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.2rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            transition: color var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--secondary);
        }
        .friend-link {
            display: block;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.4rem 1.6rem;
            box-shadow: var(--shadow);
        }
        .friend-link h3 {
            font-size: 1.1rem;
            color: var(--primary);
            margin-bottom: 0.8rem;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 0.4rem;
        }
        .friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
        }
        .friend-link li {
            padding: 0.2rem 0;
        }
        .friend-link a {
            font-weight: 500;
            font-size: 0.9rem;
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 2rem 1.2rem 1.4rem;
            margin-top: 2rem;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
        }
        .footer-inner a {
            color: var(--secondary);
        }
        .footer-inner a:hover {
            color: #fff;
        }
        .footer-copy {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 1.2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-copy strong {
            color: rgba(255, 255, 255, 0.85);
        }
        @media (max-width: 1024px) {
            .main-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar-area {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .friend-link ul {
                flex-direction: column;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-inner {
                padding: 0 0.8rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .content-area {
                padding: 1.2rem 1rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .sidebar-area {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb-wrap {
                font-size: 0.78rem;
            }
            .my-logo {
                font-size: 1.1rem;
            }
        }
        .tag {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary);
            padding: 0.1rem 0.7rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .last-updated {
            display: block;
            text-align: right;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 1.6rem;
            padding-top: 0.6rem;
            border-top: 1px solid var(--border);
        }
        .last-updated i {
            margin-right: 0.3rem;
        }