*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            font-size: 16px;
            scroll-behavior: smooth;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(255, 210, 0, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            -webkit-text-fill-color: #fff;
            background: none;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: #fff;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            border-radius: 8px;
            padding: 6px 14px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .navbar {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .navbar a {
            color: #e0e0ff;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .navbar a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #ffd200;
            text-decoration: none;
        }
        .navbar a i {
            margin-right: 6px;
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid #e9ecef;
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #adb5bd;
            font-size: 1.2rem;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #0057b3;
        }
        .breadcrumb .active {
            color: #6c757d;
            font-weight: 600;
        }
        .page-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 110px;
            align-self: start;
        }
        @media (max-width: 900px) {
            .page-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .nav-toggle {
                display: block;
            }
            .navbar {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 12, 41, 0.98);
                padding: 16px 0;
                border-radius: 16px;
                margin-top: 8px;
            }
            .navbar.open {
                display: flex;
            }
            .navbar a {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
            }
            .header-inner {
                position: relative;
            }
        }
        .card {
            background: #fff;
            border-radius: 20px;
            padding: 28px 32px;
            margin-bottom: 32px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            transition: box-shadow 0.3s;
        }
        .card:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.07);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #1a1a2e, #302b63);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        h1 i {
            -webkit-text-fill-color: #ff6b35;
            margin-right: 12px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 4px solid #ffd200;
            display: inline-block;
        }
        h2 i {
            color: #ff6b35;
            margin-right: 10px;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin: 28px 0 12px;
            color: #24243e;
        }
        h3 i {
            color: #f7971e;
            margin-right: 8px;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 20px 0 8px;
            color: #302b63;
        }
        p {
            margin-bottom: 18px;
            color: #2d2d44;
        }
        .highlight-box {
            background: #f0f4ff;
            border-left: 6px solid #0057b3;
            padding: 20px 24px;
            border-radius: 0 16px 16px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #0057b3;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-item {
            background: #f8f9ff;
            border-radius: 16px;
            padding: 20px 16px;
            text-align: center;
            border: 1px solid #e9ecef;
            transition: transform 0.2s;
        }
        .stat-item:hover {
            transform: translateY(-4px);
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #0057b3;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: #6c757d;
            margin-top: 4px;
        }
        .feature-image {
            margin: 28px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }
        .feature-image figcaption {
            font-size: 0.85rem;
            color: #6c757d;
            padding: 12px 16px;
            background: #f8f9fa;
            text-align: center;
        }
        .sidebar .card {
            padding: 20px 22px;
        }
        .sidebar h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #ffd200;
            padding-bottom: 8px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
        }
        .sidebar ul li a i {
            color: #ff6b35;
            width: 18px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.9rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #dee2e6;
            border-radius: 12px;
            font-size: 0.95rem;
            transition: border-color 0.25s;
            background: #fafbfc;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #0057b3;
            outline: none;
            background: #fff;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            background: #0057b3;
            color: #fff;
        }
        .btn:hover {
            background: #003d7a;
            transform: scale(1.01);
        }
        .btn-secondary {
            background: #302b63;
        }
        .btn-secondary:hover {
            background: #1f1b4a;
        }
        .btn-warning {
            background: #f7971e;
            color: #1a1a2e;
        }
        .btn-warning:hover {
            background: #d97e0a;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            cursor: pointer;
            color: #ccc;
            transition: color 0.15s;
        }
        .rating-stars .star.active,
        .rating-stars .star:hover,
        .rating-stars .star:hover~.star {
            color: #ffc107;
        }
        .rating-stars .star {
            transition: color 0.15s;
        }
        .site-footer {
            background: #0f0c29;
            color: #c0c0e0;
            padding: 40px 0 20px;
            margin-top: 40px;
            border-top: 4px solid #ffd200;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-grid h4 {
            color: #ffd200;
            margin-bottom: 12px;
            font-size: 1.05rem;
        }
        .footer-grid a {
            color: #b0b0d0;
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
        }
        .footer-grid a:hover {
            color: #ffd200;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #8888aa;
        }
        friend-link {
            display: block;
            margin: 16px 0;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 12px;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0 12px 8px 0;
            color: #ffd200;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: #6c757d;
            padding: 8px 16px;
            background: #f0f2f5;
            border-radius: 30px;
            width: fit-content;
            margin-bottom: 20px;
        }
        .tag {
            display: inline-block;
            background: #e9ecef;
            border-radius: 30px;
            padding: 2px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #495057;
        }
        .pro-tip {
            background: #fff9e6;
            border-radius: 16px;
            padding: 20px 24px;
            border-left: 6px solid #ffc107;
            margin: 20px 0;
        }
        .pro-tip strong {
            color: #b8860b;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e9ecef;
        }
        th {
            background: #f0f4ff;
            font-weight: 700;
            color: #302b63;
        }
        tr:hover td {
            background: #f8f9ff;
        }
        @media (max-width: 600px) {
            .card {
                padding: 18px 16px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .header-inner {
                gap: 8px;
            }
        }
        @media print {
            .site-header,
            .site-footer,
            .sidebar,
            .breadcrumb-wrap,
            .nav-toggle,
            .search-form,
            .comment-form,
            .rating-form {
                display: none !important;
            }
            .page-wrap {
                display: block;
            }
            .card {
                box-shadow: none;
                border: 1px solid #ddd;
            }
        }