* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f4f7fc;
            color: #1a2634;
            line-height: 1.7;
            font-size: 1.05rem;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0d3b5c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        header {
            background: linear-gradient(145deg, #0b1a2e, #132a44);
            padding: 18px 0;
            border-bottom: 3px solid #2a7faa;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #8fcbff, #4da6e0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(77, 166, 224, 0.2);
            transition: transform 0.2s ease;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #f0c75e;
            margin-right: 8px;
            font-size: 1.8rem;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        nav a {
            color: #e0edf7;
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.92rem;
            transition: background 0.25s, color 0.2s;
            white-space: nowrap;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #ffd966;
            text-decoration: none;
        }
        nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #e0edf7;
            color: #e0edf7;
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        #nav-toggle {
            display: none;
        }
        #nav-toggle:checked~nav {
            display: flex;
            flex-direction: column;
            width: 100%;
            margin-top: 16px;
            gap: 4px;
        }
        #nav-toggle:checked~nav a {
            width: 100%;
            text-align: center;
            padding: 12px;
        }
        .breadcrumbs {
            background: #e9eff5;
            padding: 12px 0;
            border-bottom: 1px solid #d0dce8;
            font-size: 0.9rem;
        }
        .breadcrumbs .container {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumbs a {
            color: #2a6f8f;
        }
        .breadcrumbs a:hover {
            color: #0d3b5c;
        }
        .breadcrumbs span {
            color: #4f6a7e;
        }
        .breadcrumbs .sep {
            color: #8aa3b8;
        }
        main {
            padding: 40px 0 60px;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #0b1a2e;
            margin-bottom: 12px;
            border-left: 6px solid #2a7faa;
            padding-left: 22px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #132a44;
            border-bottom: 2px solid #cbdae7;
            padding-bottom: 8px;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1e3f5a;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 22px;
            margin-bottom: 8px;
            color: #2a5575;
        }
        p {
            margin-bottom: 18px;
            color: #1f2e3c;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-body {
            min-width: 0;
        }
        .sidebar {
            border-left: 1px solid #d5e0ea;
            padding-left: 32px;
        }
        .sidebar-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 28px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid #e6edf4;
        }
        .sidebar-card h4 {
            margin-top: 0;
            border-bottom: 1px solid #e0e8f0;
            padding-bottom: 10px;
            font-size: 1.1rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f4f9;
        }
        .sidebar-card li a {
            font-weight: 500;
            display: block;
        }
        .sidebar-card li a i {
            margin-right: 8px;
            color: #2a7faa;
            width: 18px;
        }
        .feature-highlight {
            background: #e3eef9;
            border-radius: 20px;
            padding: 28px 32px;
            margin: 32px 0;
            border-left: 6px solid #2a7faa;
        }
        .feature-highlight i {
            color: #2a7faa;
            margin-right: 10px;
        }
        .img-wrapper {
            margin: 32px 0 24px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            background: #dce6f0;
            position: relative;
        }
        .img-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .img-caption {
            font-size: 0.85rem;
            color: #4f6a7e;
            text-align: center;
            padding: 8px 16px 12px;
            background: #f8fafc;
            font-style: italic;
        }
        blockquote {
            border-left: 5px solid #2a7faa;
            background: #f0f5fa;
            padding: 20px 28px;
            margin: 28px 0;
            border-radius: 0 16px 16px 0;
            font-style: italic;
            color: #1f3a4f;
        }
        blockquote cite {
            display: block;
            margin-top: 12px;
            font-weight: 600;
            color: #0b1a2e;
            font-style: normal;
        }
        .search-box {
            background: #ffffff;
            border-radius: 60px;
            border: 1px solid #cbdae7;
            display: flex;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
            max-width: 520px;
            margin: 28px 0;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 14px 22px;
            font-size: 1rem;
            outline: none;
            background: transparent;
            font-family: inherit;
        }
        .search-box button {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 14px 28px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: #0d3b5c;
        }
        .feedback-section {
            background: #ffffff;
            border-radius: 24px;
            padding: 32px 36px;
            margin: 48px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #e6edf4;
        }
        .feedback-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: #1a2c3e;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid #cbdae7;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            background: #fafcfe;
            transition: border 0.2s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #2a7faa;
            outline: none;
            box-shadow: 0 0 0 3px rgba(42, 127, 170, 0.15);
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 14px 36px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn:hover {
            background: #0d3b5c;
            transform: scale(1.02);
        }
        .btn-secondary {
            background: #e3eef9;
            color: #1a2c3e;
        }
        .btn-secondary:hover {
            background: #cbdae7;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #d0d8e0;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating i {
            transition: color 0.15s, transform 0.1s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #f5b342;
            transform: scale(1.1);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #132a44;
            color: #f0f8ff;
            padding: 14px 20px;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 14px 20px;
            border-bottom: 1px solid #e8eff5;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f4f9ff;
        }
        friend-link {
            display: block;
            background: #e9eff5;
            border-radius: 20px;
            padding: 28px 32px;
            margin-top: 40px;
            border: 1px solid #d0dce8;
        }
        friend-link h4 {
            margin-top: 0;
            font-size: 1.2rem;
            color: #0b1a2e;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            padding: 0;
            margin-top: 12px;
        }
        friend-link li a {
            font-weight: 500;
            color: #1e6f9f;
        }
        friend-link li a:hover {
            color: #0d3b5c;
        }
        footer {
            background: #0b1a2e;
            color: #c5d8e8;
            padding: 40px 0 32px;
            border-top: 3px solid #2a7faa;
        }
        footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
        }
        footer .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        footer a {
            color: #8fcbff;
        }
        footer a:hover {
            color: #ffd966;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .last-update {
            font-size: 0.85rem;
            color: #5f7a8f;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            background: #f0f5fa;
            padding: 8px 18px;
            border-radius: 40px;
            width: fit-content;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .sidebar {
                border-left: none;
                padding-left: 0;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: inline-block;
            }
            nav {
                display: none;
                width: 100%;
            }
            nav a {
                width: 100%;
                text-align: center;
                padding: 12px;
            }
            #nav-toggle:checked~nav {
                display: flex;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 14px;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .feedback-section {
                padding: 20px;
            }
            .search-box {
                max-width: 100%;
            }
            .search-box input {
                padding: 12px 16px;
                font-size: 0.95rem;
            }
            .search-box button {
                padding: 12px 18px;
                font-size: 0.95rem;
            }
            .data-table {
                font-size: 0.9rem;
            }
            .data-table th,
            .data-table td {
                padding: 10px 14px;
            }
            .feature-highlight {
                padding: 20px;
            }
            blockquote {
                padding: 16px 20px;
            }
            footer .container {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .breadcrumbs .container {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.2rem;
            }
            h3 {
                font-size: 1.05rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }