* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, Arial, sans-serif;
            background: #f4f7fc;
            color: #1a2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #fff;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            border-radius: 24px;
            padding: 20px 24px 10px;
            margin-top: 16px;
            margin-bottom: 32px;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 16px;
            border-bottom: 2px solid #eef3f8;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            text-decoration: none;
            color: #0b2a3e;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #0f3b4f, #1b5a78);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #1b5a78;
            font-size: 2rem;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #5f7e94;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #1a2a3a;
            background: none;
            border: none;
            padding: 4px 8px;
            transition: 0.2s;
        }
        .hamburger:hover {
            color: #1b5a78;
        }
        #nav-toggle {
            display: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 12px 20px;
            flex-wrap: wrap;
        }
        nav a {
            text-decoration: none;
            color: #1f3b4e;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 4px;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        nav a:hover {
            color: #0b2a3e;
            border-bottom-color: #1b5a78;
        }
        nav a i {
            margin-right: 5px;
            color: #1b5a78;
        }
        .breadcrumb {
            padding: 14px 0 8px;
            font-size: 0.85rem;
            color: #5f7e94;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 10px;
            align-items: center;
            border-bottom: 1px solid #e8edf2;
            margin-bottom: 18px;
        }
        .breadcrumb a {
            color: #1b5a78;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: #8ba3b8;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #0b2a3e;
            margin: 20px 0 8px;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0f3b4f;
            margin: 40px 0 16px;
            padding-bottom: 6px;
            border-bottom: 3px solid #dbe6ee;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1a4a62;
            margin: 32px 0 12px;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #1f5a78;
            margin: 24px 0 8px;
        }
        p {
            margin-bottom: 18px;
            color: #1e3344;
        }
        .highlight {
            background: #e6f0f7;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
        }
        .stat-box {
            background: #f0f5fa;
            border-left: 4px solid #1b5a78;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .stat-box i {
            color: #1b5a78;
            margin-right: 6px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 20px 0;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 18px;
            margin: 20px 0;
        }
        .card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 20px;
            border: 1px solid #e5edf4;
            transition: 0.25s;
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            border-color: #b6d0e0;
        }
        .card h4 i {
            color: #1b5a78;
            margin-right: 8px;
        }
        .img-wrapper {
            margin: 28px 0;
            border-radius: 18px;
            overflow: hidden;
            background: #eef3f8;
            text-align: center;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .img-wrapper img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 0 auto;
        }
        .img-wrapper .caption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #4a6a7e;
            background: #f4f9fe;
        }
        .form-section {
            background: #f7faff;
            border-radius: 20px;
            padding: 24px 28px;
            margin: 32px 0;
            border: 1px solid #dee9f2;
        }
        .form-section h3 i {
            color: #1b5a78;
            margin-right: 10px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            color: #1a3a4e;
            margin-bottom: 4px;
            font-size: 0.9rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid #cddce8;
            border-radius: 12px;
            font-size: 1rem;
            background: #fff;
            transition: 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #1b5a78;
            outline: none;
            box-shadow: 0 0 0 3px rgba(27, 90, 120, 0.12);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #1b5a78;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #0f3b4f;
            transform: scale(1.02);
        }
        .btn i {
            font-size: 0.95rem;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #d0dde8;
            cursor: pointer;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f5b342;
        }
        .comment-item {
            background: #f4f9fe;
            border-radius: 14px;
            padding: 16px 20px;
            margin-bottom: 12px;
            border-left: 3px solid #1b5a78;
        }
        .comment-item strong {
            color: #0b2a3e;
        }
        .comment-item .meta {
            font-size: 0.8rem;
            color: #5f7e94;
        }
        friend-link {
            display: block;
            padding: 24px 0 12px;
            border-top: 2px solid #e8edf2;
            margin-top: 28px;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #1b5a78;
            text-decoration: none;
            margin: 0 12px 0 0;
            font-weight: 500;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        footer {
            padding: 20px 0 12px;
            font-size: 0.85rem;
            color: #5f7e94;
            border-top: 1px solid #e8edf2;
            margin-top: 16px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        footer .copyright {
            font-weight: 400;
        }
        .last-updated {
            background: #eef3f8;
            display: inline-block;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #1f4a62;
            margin-bottom: 16px;
        }
        @media (max-width: 820px) {
            .container {
                padding: 16px 16px 8px;
                border-radius: 18px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .grid-2,
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 0 8px;
                gap: 8px;
            }
            #nav-toggle:checked~nav {
                display: flex;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .form-section {
                padding: 16px 18px;
            }
            .rating-stars {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px 12px 6px;
                margin-top: 8px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo small {
                font-size: 0.6rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
        }
        .inline-link {
            color: #1b5a78;
            text-decoration: none;
            font-weight: 500;
            border-bottom: 1px dotted #b6d0e0;
        }
        .inline-link:hover {
            border-bottom-color: #1b5a78;
        }
        .emoji-lg {
            font-size: 1.4rem;
            margin-right: 4px;
        }
        .tag {
            background: #dce8f0;
            border-radius: 30px;
            padding: 2px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #1a4a62;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        table th {
            background: #e2ebf3;
            color: #0b2a3e;
            padding: 10px 14px;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 10px 14px;
            border-bottom: 1px solid #e2ebf3;
        }
        table tr:hover td {
            background: #f4f9fe;
        }
        .schema-hidden {
            display: none;
        }