*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f5f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus-visible {
            color: #004999;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
            padding: 20px 24px 32px;
        }
        @media (max-width: 600px) {
            .container {
                padding: 12px 14px 20px;
                border-radius: 16px;
            }
            body {
                padding: 0 8px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 2px solid #eef2f7;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #1a3a5c, #2d6a9f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #5a7a9a;
            font-weight: 400;
            display: block;
            letter-spacing: 0.4px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e2a3a;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #eef2f7;
        }
        .navbar {
            display: flex;
            gap: 8px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .navbar a {
            font-weight: 500;
            padding: 6px 0;
            color: #2c3e50;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .navbar a:hover {
            border-bottom-color: #2d6a9f;
            color: #1a3a5c;
            text-decoration: none;
        }
        @media (max-width: 700px) {
            .nav-toggle {
                display: block;
            }
            .navbar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 0 8px;
                gap: 4px;
            }
            .navbar.open {
                display: flex;
            }
            .navbar a {
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid #eef2f7;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            padding: 12px 0 8px;
            font-size: 0.9rem;
            color: #5a7a9a;
        }
        .breadcrumb a {
            color: #2d6a9f;
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: #a0b8ce;
        }
        .breadcrumb span {
            color: #1e2a3a;
            font-weight: 500;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 20px 0 12px;
            color: #0f1e2f;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 40px 0 16px;
            padding-bottom: 6px;
            border-bottom: 3px solid #e0e9f2;
            color: #1a3a5c;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: #2c4a6a;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 20px 0 8px;
            color: #3a5a7a;
        }
        p {
            margin: 0 0 18px;
            color: #2a3a4a;
        }
        .content-highlight {
            background: #f0f6fe;
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            color: #1a3a5c;
        }
        .big-emoji {
            font-size: 1.4rem;
            margin-right: 4px;
        }
        .divider {
            height: 2px;
            background: linear-gradient(90deg, #dde6ef, transparent);
            margin: 32px 0;
            border: none;
        }
        .feature-image {
            margin: 24px auto 28px;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            max-width: 840px;
            width: 100%;
        }
        .feature-image figcaption {
            font-size: 0.9rem;
            color: #5a7a9a;
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
            margin: 24px 0 28px;
        }
        .card {
            background: #f9fbfd;
            border-radius: 16px;
            padding: 20px 18px;
            border: 1px solid #e8edf4;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
        }
        .card i {
            font-size: 1.6rem;
            color: #2d6a9f;
            margin-bottom: 8px;
        }
        .card h4 {
            margin-top: 0;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0 28px;
            font-size: 0.95rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #1a3a5c;
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 10px 16px;
            border-bottom: 1px solid #e8edf4;
        }
        .data-table tr:nth-child(even) {
            background: #f7f9fc;
        }
        .data-table tr:hover td {
            background: #edf3fa;
        }
        .form-section {
            background: #f7faff;
            border-radius: 20px;
            padding: 24px 28px;
            margin: 32px 0;
            border: 1px solid #e0e9f2;
        }
        .form-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            color: #1e2a3a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #d0dce8;
            border-radius: 12px;
            font-size: 1rem;
            background: #fff;
            transition: border-color 0.2s, box-shadow 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #2d6a9f;
            box-shadow: 0 0 0 3px rgba(45, 106, 159, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #1a3a5c;
            color: #fff;
            padding: 12px 28px;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn:hover {
            background: #2d6a9f;
            transform: translateY(-2px);
            color: #fff;
            text-decoration: none;
        }
        .btn i {
            font-size: 1.1rem;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.8rem;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d0dce8;
            transition: color 0.15s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .comment-item {
            background: #f9fbfd;
            border-radius: 14px;
            padding: 16px 20px;
            margin-bottom: 12px;
            border-left: 4px solid #2d6a9f;
        }
        .comment-item .meta {
            font-size: 0.85rem;
            color: #6a8aaa;
            margin-bottom: 4px;
        }
        .comment-item .name {
            font-weight: 700;
            color: #1a3a5c;
        }
        friend-link {
            display: block;
            padding: 20px 0 12px;
            border-top: 2px solid #eef2f7;
            margin-top: 28px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 4px 0;
            font-weight: 500;
        }
        .site-footer {
            padding: 24px 0 12px;
            text-align: center;
            color: #5a7a9a;
            font-size: 0.9rem;
            border-top: 2px solid #eef2f7;
            margin-top: 20px;
        }
        .site-footer .copyright {
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        @media (max-width: 600px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .form-section {
                padding: 16px 14px;
            }
            .data-table th,
            .data-table td {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        section {
            scroll-margin-top: 20px;
        }
        .schema-hidden {
            display: none;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #6a8aaa;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 8px 0 16px;
        }
        .last-updated i {
            font-size: 0.9rem;
        }