*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --accent: #f5c518;
            --accent-dark: #d4a800;
            --bg: #f8f6f0;
            --card-bg: #ffffff;
            --text: #1e1e1e;
            --text-light: #5a5a5a;
            --border: #e0dcd5;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --font: 'Segoe UI', system-ui, -apple-system, 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;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0.75rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            color: var(--accent);
        }
        .my-logo span {
            font-weight: 300;
            opacity: 0.8;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .primary-nav {
            display: flex;
            gap: 0.25rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: rgba(255, 255, 255, 0.85);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .primary-nav a:hover,
        .primary-nav a.active {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .primary-nav a i {
            margin-right: 0.4rem;
            font-size: 0.85rem;
        }
        .breadcrumbs {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 0.6rem 1.5rem;
            font-size: 0.88rem;
        }
        .breadcrumbs-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
        }
        .breadcrumbs a {
            color: var(--text-light);
        }
        .breadcrumbs a:hover {
            color: var(--primary-light);
        }
        .breadcrumbs span {
            color: var(--text-light);
        }
        .breadcrumbs .sep {
            color: #bbb;
            margin: 0 0.2rem;
        }
        .page-wrap {
            max-width: 1280px;
            margin: 0 auto;
            padding: 2rem 1.5rem 3rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 6rem;
            align-self: start;
        }
        .main-content h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.75rem;
        }
        .main-content h1 i {
            color: var(--accent);
        }
        .main-content .subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 2rem;
            border-left: 4px solid var(--accent);
            padding-left: 1.2rem;
        }
        .main-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 0.4rem;
        }
        .main-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 2rem;
            margin-bottom: 0.6rem;
        }
        .main-content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 1.4rem;
            margin-bottom: 0.4rem;
        }
        .main-content p {
            margin-bottom: 1.2rem;
        }
        .main-content ul,
        .main-content ol {
            margin: 0 0 1.4rem 1.6rem;
        }
        .main-content li {
            margin-bottom: 0.4rem;
        }
        .main-content .highlight {
            background: #fef9e7;
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 1.6rem 0;
        }
        .main-content .highlight strong {
            color: var(--primary);
        }
        .main-content .emoji-big {
            font-size: 1.8rem;
            display: inline-block;
            margin-right: 0.3rem;
        }
        .featured-img {
            margin: 2rem 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .featured-img figcaption {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-top: 0.6rem;
            text-align: center;
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.82rem;
            margin-bottom: 1.2rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .sidebar-widget {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 0.3rem;
        }
        .sidebar-widget ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-widget li {
            margin-bottom: 0.5rem;
            border-bottom: 1px solid var(--border);
            padding-bottom: 0.5rem;
        }
        .sidebar-widget li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        .sidebar-widget a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.92rem;
            color: var(--text);
        }
        .sidebar-widget a:hover {
            color: var(--primary-light);
        }
        .sidebar-widget a i {
            color: var(--accent);
            width: 1.2rem;
            font-size: 0.85rem;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin-top: 0.3rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.92rem;
            outline: none;
            transition: border var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary-light);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 0.6rem 1.2rem;
            font-size: 0.92rem;
            cursor: pointer;
            transition: background var(--transition);
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .feedback-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.8rem;
            margin-top: 2.5rem;
        }
        .feedback-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1.2rem;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .feedback-card {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.2rem;
        }
        .feedback-card h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            color: var(--primary);
        }
        .feedback-card label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 0.3rem;
            color: var(--text-light);
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            width: 100%;
            padding: 0.5rem 0.8rem;
            border: 2px solid var(--border);
            border-radius: 6px;
            font-size: 0.9rem;
            font-family: var(--font);
            outline: none;
            transition: border var(--transition);
            background: #fafafa;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--primary-light);
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 80px;
        }
        .feedback-card .btn-submit {
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            border: none;
            border-radius: 6px;
            padding: 0.6rem 1.6rem;
            cursor: pointer;
            font-size: 0.95rem;
            transition: background var(--transition), transform 0.15s;
            margin-top: 0.5rem;
        }
        .feedback-card .btn-submit:hover {
            background: var(--accent-dark);
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.4rem;
            color: #ddd;
            cursor: pointer;
            margin: 0.3rem 0 0.6rem;
        }
        .rating-stars .star {
            transition: color var(--transition), transform 0.15s;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: var(--accent);
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            margin-top: 2rem;
        }
        friend-link h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 0.3rem;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
        }
        friend-link .friend-list a {
            color: var(--text-light);
            font-size: 0.9rem;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            transition: background var(--transition), color var(--transition);
        }
        friend-link .friend-list a:hover {
            background: var(--accent);
            color: var(--primary);
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 2rem 1.5rem;
            text-align: center;
            font-size: 0.9rem;
            margin-top: 2rem;
        }
        .site-footer .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
        }
        .site-footer a {
            color: var(--accent);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .site-footer .copyright {
            margin-top: 0.8rem;
            opacity: 0.7;
            font-size: 0.82rem;
        }
        @media (max-width: 900px) {
            .page-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .header-inner {
                padding: 0.6rem 1rem;
            }
        }
        @media (max-width: 700px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: var(--primary);
                padding: 0.5rem 0 1rem;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 0.5rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.6rem 1rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .main-content h1 {
                font-size: 1.8rem;
            }
            .main-content h2 {
                font-size: 1.35rem;
            }
            .main-content h3 {
                font-size: 1.1rem;
            }
            .page-wrap {
                padding: 1.2rem 1rem 2rem;
            }
            .breadcrumbs {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
                overflow-x: auto;
                white-space: nowrap;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            .feedback-card {
                padding: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                padding: 0.5rem 0.75rem;
            }
            .my-logo {
                font-size: 1.05rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-gap {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            align-items: center;
        }