* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f4f7fc;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0a5c8a;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e67e22;
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            border-radius: 20px;
            padding: 24px 28px;
            margin-top: 20px;
            margin-bottom: 40px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 18px;
            border-bottom: 2px solid #eef2f7;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0a5c8a, #1e8bc3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .my-logo i {
            -webkit-text-fill-color: #e67e22;
            margin-right: 6px;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #0a5c8a;
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 1.4rem;
            color: #0a5c8a;
            cursor: pointer;
        }
        .main-nav {
            display: flex;
            gap: 12px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            font-weight: 600;
            padding: 6px 12px;
            border-radius: 30px;
            background: transparent;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            background: #0a5c8a;
            color: #fff;
            text-decoration: none;
        }
        .breadcrumb {
            width: 100%;
            margin-top: 12px;
            font-size: 0.85rem;
            color: #5f6c80;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb a {
            color: #0a5c8a;
        }
        .breadcrumb span {
            color: #8a9aa8;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            margin: 28px 0 12px 0;
            color: #0a2a3f;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 40px 0 14px 0;
            color: #0a3d5c;
            border-left: 6px solid #e67e22;
            padding-left: 16px;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 30px 0 10px 0;
            color: #145a7a;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 20px 0 8px 0;
            color: #1e6f8f;
        }
        p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: #2c3e50;
        }
        .feature-img {
            width: 100%;
            max-width: 820px;
            height: auto;
            border-radius: 18px;
            margin: 24px 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.10);
            display: block;
        }
        .update-badge {
            display: inline-block;
            background: #eef2f7;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2c3e50;
            margin-bottom: 18px;
        }
        .update-badge i {
            margin-right: 6px;
            color: #e67e22;
        }
        .highlight {
            background: #fef9e7;
            border-left: 4px solid #e67e22;
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .highlight strong {
            color: #0a3d5c;
        }
        .btn {
            display: inline-block;
            background: #0a5c8a;
            color: #fff;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .btn:hover {
            background: #e67e22;
            color: #fff;
            text-decoration: none;
            transform: scale(1.02);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0a5c8a;
            color: #0a5c8a;
        }
        .btn-outline:hover {
            background: #0a5c8a;
            color: #fff;
        }
        .search-section {
            background: #f0f5fa;
            border-radius: 18px;
            padding: 28px 30px;
            margin: 30px 0;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #dce3ec;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #0a5c8a;
        }
        .search-form button {
            background: #0a5c8a;
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #e67e22;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 40px 0;
        }
        .feedback-card {
            background: #f8faff;
            border-radius: 18px;
            padding: 24px 26px;
            border: 1px solid #e6edf5;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 12px 16px;
            border: 2px solid #dce3ec;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #0a5c8a;
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 90px;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #dce3ec;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f1c40f;
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 10px 16px;
            margin: 20px 0;
            padding: 0;
            list-style: none;
        }
        .link-grid li a {
            display: block;
            padding: 8px 14px;
            background: #f4f8fe;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background 0.2s, color 0.2s;
        }
        .link-grid li a:hover {
            background: #0a5c8a;
            color: #fff;
            text-decoration: none;
        }
        .site-footer {
            border-top: 2px solid #eef2f7;
            padding-top: 28px;
            margin-top: 40px;
        }
        friend-link {
            display: block;
            padding: 18px 20px;
            background: #f4f8fe;
            border-radius: 16px;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0 12px 6px 0;
            padding: 4px 12px;
            background: #e6edf5;
            border-radius: 30px;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #0a5c8a;
            color: #fff;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding: 16px 0 6px;
            font-size: 0.85rem;
            color: #5f6c80;
        }
        .copyright i {
            color: #e67e22;
        }
        @media (max-width: 768px) {
            .container {
                padding: 16px 14px;
                margin-top: 12px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 0;
                gap: 8px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                width: 100%;
                padding: 10px 16px;
                border-radius: 12px;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input[type="text"] {
                width: 100%;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .link-grid {
                grid-template-columns: 1fr 1fr;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .link-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .feature-img {
                border-radius: 12px;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        .author-bio {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #f4f8fe;
            padding: 14px 20px;
            border-radius: 16px;
            margin: 24px 0;
        }
        .author-bio i {
            font-size: 2.2rem;
            color: #0a5c8a;
        }
        .author-bio strong {
            color: #0a3d5c;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        table th {
            background: #0a5c8a;
            color: #fff;
            padding: 12px 16px;
            text-align: left;
        }
        table td {
            padding: 10px 16px;
            border-bottom: 1px solid #e6edf5;
        }
        table tr:hover td {
            background: #f4f8fe;
        }