* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f5f7fb;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0 20px;
        }
        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: 10px;
            margin: 30px 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 15px 50px rgba(0, 0, 0, 0.04);
            padding: 20px 30px 40px;
        }
        .header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0 15px;
            border-bottom: 2px solid #eef2f7;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #003366, #0099cc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo span {
            font-weight: 300;
            color: #ff6b35;
            -webkit-text-fill-color: #ff6b35;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: #003366;
            padding: 5px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f7;
        }
        .nav-menu {
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            font-weight: 600;
            font-size: 0.95rem;
            color: #1a1a2e;
            padding: 6px 0;
            border-bottom: 3px solid transparent;
            transition: 0.2s;
        }
        .nav-menu a:hover {
            border-bottom-color: #0099cc;
            color: #003366;
            text-decoration: none;
        }
        .breadcrumb {
            width: 100%;
            padding: 14px 0 10px;
            font-size: 0.85rem;
            color: #5a6a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            border-bottom: 1px solid #eef2f7;
            margin-bottom: 10px;
        }
        .breadcrumb i {
            margin: 0 4px;
            font-size: 0.7rem;
            color: #9aabbb;
        }
        .breadcrumb a {
            color: #0057b3;
        }
        .breadcrumb a:hover {
            color: #ff6b35;
        }
        .breadcrumb .current {
            color: #1a1a2e;
            font-weight: 600;
        }
        .content {
            padding: 20px 0 30px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 20px 0 10px;
            color: #003366;
            letter-spacing: -0.5px;
        }
        h1 i {
            color: #ff6b35;
            font-size: 2rem;
            margin-right: 8px;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 45px 0 16px;
            color: #003366;
            border-left: 6px solid #0099cc;
            padding-left: 18px;
        }
        h2 i {
            color: #ff6b35;
            margin-right: 8px;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 30px 0 12px;
            color: #1a3a5a;
        }
        h3 i {
            color: #0099cc;
            margin-right: 8px;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 22px 0 8px;
            color: #2a4a6a;
        }
        p {
            margin: 16px 0;
            font-size: 1.05rem;
            color: #2c3e4e;
        }
        .highlight {
            background: #f0f8ff;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
            color: #003366;
        }
        .stat-box {
            background: #f8faff;
            border: 1px solid #dee8f2;
            border-radius: 14px;
            padding: 24px 28px;
            margin: 30px 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
        }
        .stat-box ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .stat-box li {
            padding: 10px 14px;
            background: #ffffff;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
            font-weight: 500;
        }
        .stat-box li i {
            color: #0099cc;
            width: 28px;
        }
        .quote-block {
            background: #f0f4fa;
            border-left: 6px solid #ff6b35;
            padding: 20px 28px;
            margin: 30px 0;
            border-radius: 0 14px 14px 0;
            font-style: italic;
            font-size: 1.1rem;
        }
        .quote-block strong {
            color: #003366;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 30px 0;
        }
        @media (max-width: 700px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #f9fbfd;
            border-radius: 16px;
            padding: 24px;
            border: 1px solid #eef2f7;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.05);
        }
        .card h4 {
            margin-top: 0;
        }
        .btn {
            display: inline-block;
            padding: 10px 28px;
            border-radius: 30px;
            font-weight: 600;
            background: #003366;
            color: #fff;
            border: none;
            cursor: pointer;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .btn:hover {
            background: #ff6b35;
            color: #fff;
            transform: scale(1.02);
            text-decoration: none;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #003366;
            color: #003366;
        }
        .btn-outline:hover {
            background: #003366;
            color: #fff;
        }
        .search-section {
            background: #f0f6fe;
            border-radius: 18px;
            padding: 30px 30px 35px;
            margin: 50px 0 30px;
        }
        .search-section h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #dce4ed;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: 0.2s;
        }
        .search-form input:focus {
            border-color: #0099cc;
            box-shadow: 0 0 0 4px rgba(0, 153, 204, 0.12);
        }
        .search-form button {
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 700;
            background: #003366;
            color: #fff;
            border: none;
            cursor: pointer;
            transition: 0.2s;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #ff6b35;
            transform: scale(1.02);
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 50px 0 30px;
        }
        @media (max-width: 700px) {
            .interact-grid {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .rating-box {
            background: #f9fbfd;
            border-radius: 18px;
            padding: 28px 30px 34px;
            border: 1px solid #e8eef5;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
        }
        .comment-box textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #dce4ed;
            border-radius: 14px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: 0.2s;
        }
        .comment-box textarea:focus {
            border-color: #0099cc;
            box-shadow: 0 0 0 4px rgba(0, 153, 204, 0.08);
        }
        .comment-box input {
            width: 100%;
            padding: 12px 18px;
            border: 2px solid #dce4ed;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: 0.2s;
            margin: 10px 0 14px;
        }
        .comment-box input:focus {
            border-color: #0099cc;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 2.2rem;
            color: #d0d8e0;
            cursor: pointer;
            margin: 10px 0 18px;
            flex-wrap: wrap;
        }
        .rating-stars i {
            transition: 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #ffb347;
            transform: scale(1.08);
        }
        .rating-box select {
            padding: 12px 18px;
            border: 2px solid #dce4ed;
            border-radius: 40px;
            font-size: 1rem;
            width: 100%;
            margin-bottom: 16px;
            background: #fff;
        }
        .footer {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 2px solid #eef2f7;
        }
        .footer friend-link {
            display: block;
            padding: 18px 0 10px;
            font-weight: 600;
            color: #1a1a2e;
        }
        .footer friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 6px 14px;
            background: #f0f4fa;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: 0.2s;
        }
        .footer friend-link a:hover {
            background: #003366;
            color: #fff;
            text-decoration: none;
        }
        .copyright {
            padding: 20px 0 10px;
            font-size: 0.85rem;
            color: #6a7a8a;
            text-align: center;
            border-top: 1px solid #eef2f7;
            margin-top: 14px;
        }
        .copyright strong {
            color: #003366;
        }
        @media (max-width: 768px) {
            .container {
                padding: 12px 14px 30px;
            }
            .header {
                padding: 12px 0;
            }
            .my-logo {
                font-size: 1.6rem;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 6px;
                padding: 16px 0 10px;
                border-top: 1px solid #eef2f7;
                margin-top: 12px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 0;
                font-size: 1rem;
                border-bottom: 1px solid #f0f2f5;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .stat-box ul {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 0.75rem;
                gap: 4px 8px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 8px 10px 20px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .search-form input,
            .search-form button {
                width: 100%;
            }
            .rating-stars {
                font-size: 1.8rem;
            }
        }
        .last-updated {
            font-size: 0.85rem;
            color: #6a7a8a;
            text-align: right;
            padding: 6px 0 20px;
            border-bottom: 1px solid #eef2f7;
            margin-bottom: 20px;
        }
        .last-updated i {
            margin-right: 6px;
            color: #0099cc;
        }
        .toc {
            background: #f8faff;
            border: 1px solid #dee8f2;
            border-radius: 16px;
            padding: 22px 28px;
            margin: 30px 0 40px;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            columns: 2;
            column-gap: 30px;
        }
        .toc li {
            padding: 4px 0;
            break-inside: avoid;
        }
        .toc li a {
            font-weight: 500;
        }
        .toc li a i {
            color: #0099cc;
            width: 22px;
            font-size: 0.8rem;
        }
        @media (max-width: 600px) {
            .toc ul {
                columns: 1;
            }
        }
        .inline-link {
            font-weight: 600;
            color: #0057b3;
            border-bottom: 1px dotted #b0c8dd;
        }
        .inline-link:hover {
            color: #ff6b35;
            border-bottom-color: #ff6b35;
        }
        .btn-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin: 10px 0 4px;
        }