*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c3e6b;
            --accent: #f0c040;
            --accent-hover: #e0b030;
            --bg: #f8f6f0;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-light: #4a4a5a;
            --border: #d4cec0;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --radius: 12px;
            --transition: 0.3s ease;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1120px;
        }
        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 {
            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: 1000;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: var(--max-width);
            margin: 0 auto;
            gap: 16px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--accent);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .my-logo:hover {
            color: #fff;
        }
        .my-logo i {
            font-size: 1.4rem;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e0e8f0;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: #e8e4dc;
            padding: 10px 20px;
            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;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: #888;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        main {
            padding: 32px 0 48px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-main {
            min-width: 0;
        }
        .content-sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--accent);
            letter-spacing: -0.3px;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 16px;
            color: var(--text);
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .last-updated {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .search-box {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            border: 1px solid var(--border);
        }
        .search-box input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border var(--transition);
            background: #fff;
        }
        .search-box input:focus {
            border-color: var(--accent);
        }
        .search-box button {
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .search-box button:active {
            transform: translateY(0);
        }
        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 24px;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
        }
        .feature-card h3 {
            margin-top: 0;
        }
        .feature-card h3 i {
            color: var(--accent);
            margin-right: 8px;
        }
        .link-list {
            list-style: none;
            padding: 0;
        }
        .link-list li {
            padding: 8px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list li i {
            color: var(--accent);
            width: 20px;
            text-align: center;
        }
        .link-list a {
            font-weight: 500;
        }
        .content-image {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #e8e4dc;
            padding: 8px;
        }
        .content-image img {
            width: 100%;
            border-radius: calc(var(--radius) - 4px);
        }
        .content-image figcaption {
            padding: 12px 16px 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            font-style: italic;
            text-align: center;
        }
        .interaction-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-top: 48px;
        }
        .interaction-section h2 {
            margin-top: 0;
            border-bottom-color: var(--accent);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: var(--font);
            outline: none;
            transition: border var(--transition);
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-group .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            cursor: pointer;
            color: #ddd;
            transition: color 0.2s;
        }
        .form-group .star-rating i.active {
            color: var(--accent);
        }
        .form-group .star-rating i:hover,
        .form-group .star-rating i.hover {
            color: var(--accent-hover);
        }
        .btn-primary {
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .sidebar-module {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px 22px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .sidebar-module h3 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-module h3 i {
            color: var(--accent);
        }
        friend-link {
            display: block;
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-top: 32px;
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            margin-top: 12px;
        }
        friend-link ul li a {
            font-weight: 500;
            font-size: 0.95rem;
        }
        friend-link ul li a::before {
            content: "🔗 ";
        }
        footer {
            background: var(--primary);
            color: #c8d0dc;
            padding: 36px 20px 24px;
            margin-top: 48px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            font-size: 0.9rem;
        }
        .footer-inner .copyright {
            color: #aab4c0;
        }
        .footer-inner a {
            color: var(--accent);
        }
        .footer-inner a:hover {
            color: #fff;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .content-sidebar {
                position: static;
                order: 2;
            }
            .content-main {
                order: 1;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 680px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary-light);
                padding: 12px 16px;
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 4px;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 16px;
                width: 100%;
                border-radius: 6px;
            }
            .nav-toggle {
                display: block;
            }
            .header-inner {
                flex-wrap: wrap;
                position: relative;
            }
            .search-box {
                flex-direction: column;
                padding: 16px;
            }
            .search-box button {
                width: 100%;
                justify-content: center;
            }
            .interaction-section {
                padding: 20px 16px;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.25rem;
            }
            .feature-card {
                padding: 18px 16px;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 8px 16px;
            }
            .breadcrumb ol {
                gap: 4px 8px;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            friend-link ul {
                flex-direction: column;
                gap: 8px;
            }
        }
        @media (max-width: 400px) {
            .container {
                padding: 0 12px;
            }
            .my-logo {
                font-size: 1.1rem;
            }
            .my-logo i {
                font-size: 1rem;
            }
            .sidebar-module {
                padding: 14px 16px;
            }
        }
        .text-accent {
            color: var(--accent);
        }
        .text-small {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .emoji-lg {
            font-size: 1.4em;
        }
        .highlight {
            background: #fff7e0;
            padding: 2px 8px;
            border-radius: 4px;
        }
        ul.list-bullet {
            padding-left: 24px;
            margin-bottom: 16px;
        }
        ul.list-bullet li {
            margin-bottom: 6px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        table th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 10px 16px;
            border-bottom: 1px solid #eee;
        }
        table tr:last-child td {
            border-bottom: none;
        }
        table tr:hover td {
            background: #f8f4ec;
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: #fcf8f0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--text-light);
        }
        blockquote strong {
            color: var(--text);
        }