*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fc;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #0a66c2;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e67e22;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.8rem;
            margin: 1rem 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 4px solid #e67e22;
            padding-bottom: 0.5rem;
            display: inline-block;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #e67e22;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.15rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0b1a2a 0%, #1a3a5a 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #f5a623;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(245, 166, 35, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #ffc107;
        }
        .my-logo i {
            margin-right: 8px;
            color: #e67e22;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.8rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .nav-menu li a {
            color: #e8edf3;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-menu li a:hover {
            border-bottom-color: #e67e22;
            color: #ffc107;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            transition: 0.2s;
        }
        .hamburger:hover {
            color: #f5a623;
        }
        .breadcrumb {
            background: #e9eef3;
            padding: 0.7rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d8e0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.5rem;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #0a66c2;
        }
        .breadcrumb .current {
            color: #2c3e50;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #0f2a44, #1b4a6e);
            color: #fff;
            padding: 3rem 0 2.5rem;
            text-align: center;
            border-radius: 0 0 40px 40px;
            margin-bottom: 2rem;
        }
        .hero h1 {
            color: #fff;
            border-bottom-color: #f5a623;
            font-size: 2.6rem;
            margin-top: 0;
        }
        .hero p {
            font-size: 1.15rem;
            opacity: 0.92;
            max-width: 750px;
            margin: 1rem auto 0;
        }
        .hero .last-updated {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            padding: 0.35rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            margin-top: 1rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .content-area {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            border-bottom: 2px solid #e67e22;
            padding-bottom: 0.4rem;
            margin-top: 0;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #ecf0f1;
        }
        .sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .sidebar ul li a i {
            color: #e67e22;
            width: 1.2rem;
        }
        .featured-figure {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }
        .featured-figure img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-figure figcaption {
            background: #f0f4fa;
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: #2c3e50;
            font-style: italic;
            border-top: 1px solid #dce4ec;
        }
        .search-box {
            background: #f0f4fa;
            border-radius: 40px;
            padding: 0.6rem 1.2rem 0.6rem 1.8rem;
            display: flex;
            align-items: center;
            border: 2px solid #d0d8e0;
            transition: 0.3s;
            max-width: 500px;
            margin: 1.5rem 0;
        }
        .search-box:focus-within {
            border-color: #e67e22;
            box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.15);
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.6rem 0;
            font-size: 1rem;
            outline: none;
        }
        .search-box button {
            background: #e67e22;
            border: none;
            color: #fff;
            padding: 0.6rem 1.3rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            font-size: 0.9rem;
        }
        .search-box button:hover {
            background: #cf6d17;
            transform: scale(0.97);
        }
        .feedback-section {
            background: #f8fafc;
            border-radius: 20px;
            padding: 2rem;
            margin: 3rem 0 1.5rem;
            border: 1px solid #e0e8f0;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .comment-box textarea,
        .rating-box select,
        .rating-box input[type="number"] {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #d0d8e0;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: 0.2s;
        }
        .comment-box textarea:focus,
        .rating-box select:focus,
        .rating-box input:focus {
            border-color: #e67e22;
            outline: none;
            box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.12);
        }
        .comment-box textarea {
            min-height: 110px;
            resize: vertical;
        }
        .feedback-section .btn-submit {
            background: #0a66c2;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            font-size: 1rem;
            margin-top: 0.8rem;
        }
        .feedback-section .btn-submit:hover {
            background: #084a8f;
            transform: scale(0.98);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
            margin: 0.5rem 0;
        }
        .rating-stars i {
            transition: 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        friend-link {
            display: block;
            background: #0b1a2a;
            color: #e8edf3;
            padding: 2rem 0;
            margin-top: 3rem;
            border-radius: 20px 20px 0 0;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem 2.5rem;
            align-items: center;
            justify-content: center;
        }
        friend-link a {
            color: #f5a623;
            font-weight: 500;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.06);
            transition: 0.2s;
        }
        friend-link a:hover {
            background: rgba(245, 166, 35, 0.15);
            color: #ffc107;
            text-decoration: none;
        }
        friend-link .label {
            font-weight: 600;
            color: #b0c4d8;
            letter-spacing: 0.5px;
            font-size: 0.95rem;
        }
        footer {
            background: #05121e;
            color: #b0c4d8;
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.9rem;
        }
        footer .copyright {
            border-top: 1px solid #1a2a3a;
            padding-top: 1.2rem;
            margin-top: 0.8rem;
        }
        footer a {
            color: #f5a623;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .content-area {
                order: 1;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                position: relative;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                background: #0b1a2a;
                width: 100%;
                padding: 1rem 0 1.5rem;
                gap: 1rem;
                border-top: 1px solid #1a3a5a;
                margin-top: 0.8rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .content-area {
                padding: 1.2rem;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .search-box {
                flex-wrap: wrap;
                padding: 0.5rem 1rem;
            }
            .search-box input {
                width: 100%;
                padding: 0.4rem 0;
            }
            .search-box button {
                width: 100%;
                margin-top: 0.4rem;
            }
            .sidebar {
                padding: 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero {
                padding: 2rem 0 1.5rem;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .content-area {
                padding: 1rem;
                border-radius: 12px;
            }
            .feedback-section {
                padding: 1.2rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        .highlight-box {
            background: #fef8e7;
            border-left: 6px solid #e67e22;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.8rem 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #f0f4fa;
            border-radius: 16px;
            padding: 1rem;
            text-align: center;
            border: 1px solid #dce4ec;
        }
        .stat-card .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #e67e22;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #4a5a6a;
        }
        .pro-tip {
            background: #e6f7ed;
            border-radius: 16px;
            padding: 1.2rem 1.5rem;
            border: 1px solid #b8e0c8;
            margin: 1.5rem 0;
        }
        .pro-tip i {
            color: #2ecc71;
            margin-right: 0.6rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #fafcfe;
            border-radius: 12px;
            overflow: hidden;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e0e8f0;
        }
        th {
            background: #0b1a2a;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f0f6ff;
        }
        .btn-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #e67e22;
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: 0.2s;
            border: none;
            z-index: 999;
        }
        .btn-top:hover {
            background: #cf6d17;
            transform: translateY(-4px);
        }
        @media (max-width: 600px) {
            .btn-top {
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
                bottom: 20px;
                right: 20px;
            }
        }