*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f7fb;
            color: #1a2634;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #003d7a;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1a2e;
            margin-top: 1.6rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.4rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #f5a623;
            padding-left: 0.8rem;
        }
        h3 {
            font-size: 1.3rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c4a6e;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.6rem;
        }
        .my-logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f5a623, #f7c948);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-block;
        }
        .my-logo a {
            color: inherit;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
        }
        .my-logo a:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #b0c7db;
            color: #b0c7db;
            display: block;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.4rem 0.9rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e0edf7;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            color: #f5a623;
            border-bottom-color: #f5a623;
            text-decoration: none;
        }
        .nav-menu .active {
            color: #f5a623;
            border-bottom-color: #f5a623;
        }
        .breadcrumb {
            background: #eaf0f6;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d0dce8;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #7a8ca0;
        }
        .breadcrumb a {
            color: #0057b3;
        }
        .breadcrumb .current {
            color: #4a5f73;
            font-weight: 500;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.2rem;
            margin: 2rem 0;
        }
        @media (max-width: 900px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .sidebar-area {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 1.6rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            height: fit-content;
            position: sticky;
            top: 5.5rem;
        }
        @media (max-width: 900px) {
            .sidebar-area {
                position: static;
            }
            .content-area {
                padding: 1.4rem 1rem;
            }
        }
        .sidebar-module {
            margin-bottom: 2rem;
        }
        .sidebar-module h3 {
            font-size: 1.1rem;
            border-bottom: 2px solid #f0a500;
            padding-bottom: 0.4rem;
            margin-bottom: 0.8rem;
        }
        .sidebar-module ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-module li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #edf2f7;
        }
        .sidebar-module li a {
            font-weight: 500;
            font-size: 0.95rem;
            display: block;
        }
        .feature-image {
            border-radius: 14px;
            overflow: hidden;
            margin: 1.6rem 0;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
            background: #eaf0f6;
        }
        .feature-image img {
            width: 100%;
            object-fit: cover;
            min-height: 200px;
            background: #d0dce8;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #4a5f73;
            background: #f8fafc;
            border-top: 1px solid #e0e8f0;
        }
        .search-box {
            display: flex;
            gap: 0.4rem;
            margin: 1.2rem 0 1.8rem;
            max-width: 560px;
        }
        .search-box input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #d0dce8;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.2s;
            background: #f9fbfd;
        }
        .search-box input:focus {
            border-color: #f5a623;
        }
        .search-box button {
            background: #f5a623;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            color: #0b1a2e;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .search-box button:hover {
            background: #e0941a;
            transform: scale(1.02);
        }
        .search-box button i {
            margin-right: 0.3rem;
        }
        .feedback-section {
            margin-top: 2.4rem;
            padding-top: 2rem;
            border-top: 2px solid #e8edf4;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
        }
        @media (max-width: 600px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 14px;
            padding: 1.4rem 1.6rem;
            border: 1px solid #e4eaf2;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #f0a500;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            margin-top: 1rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.65rem 1rem;
            border: 1.5px solid #d0dce8;
            border-radius: 10px;
            font-size: 0.92rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #f5a623;
            outline: none;
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: #0b1a2e;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.4rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .feedback-card .btn-submit:hover {
            background: #1e3a5f;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.6rem;
            color: #d0dce8;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5a623;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c8d8e8;
            padding: 2.4rem 0 1.2rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 700px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.6rem;
            }
        }
        .footer-inner h4 {
            color: #f5a623;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-inner a {
            color: #b0c7db;
        }
        .footer-inner a:hover {
            color: #f5a623;
            text-decoration: none;
        }
        .footer-inner ul {
            list-style: none;
            padding: 0;
        }
        .footer-inner li {
            padding: 0.25rem 0;
        }
        .friend-link {
            display: block;
            margin-top: 0.3rem;
        }
        .friend-link a {
            display: inline-block;
            margin-right: 0.8rem;
            font-size: 0.92rem;
        }
        .copyright {
            border-top: 1px solid #1e3a5f;
            margin-top: 1.6rem;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: #8aa0b8;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(11, 26, 46, 0.98);
                padding: 1rem 0 1.2rem;
                border-radius: 0 0 14px 14px;
                gap: 0.3rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.5rem 1.2rem;
                border-bottom: none;
                border-left: 3px solid transparent;
            }
            .nav-menu a:hover {
                border-left-color: #f5a623;
                border-bottom: none;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.1rem;
            }
        }
        .badge {
            display: inline-block;
            background: #f5a623;
            color: #0b1a2e;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .highlight-box {
            background: #f0f6fe;
            border-left: 5px solid #f5a623;
            padding: 1rem 1.4rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
            min-width: 500px;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e0e8f0;
        }
        th {
            background: #eaf0f6;
            font-weight: 700;
            color: #0b1a2e;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .emoji-big {
            font-size: 1.8rem;
            display: inline-block;
            margin-right: 0.3rem;
        }
        .last-updated {
            display: block;
            text-align: right;
            font-size: 0.82rem;
            color: #6a8098;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .content-area p,
        .content-area li {
            font-size: 1.02rem;
            letter-spacing: 0.2px;
        }
        .content-area ul,
        .content-area ol {
            margin-bottom: 1rem;
        }
        .content-area li {
            margin-bottom: 0.3rem;
        }