*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            background: #f5f7fc;
            color: #1a1a2e;
            line-height: 1.75;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0a5c8c;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #e67e22;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0a1a2f;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.4rem 0 1rem;
            border-bottom: 3px solid #e67e22;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0a1a2f 0%, #1a2a4f 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-shadow: 0 2px 8px rgba(230, 126, 34, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #f5d6b3;
        }
        .my-logo span {
            color: #e67e22;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.7;
            display: block;
            letter-spacing: 1px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .main-nav li a {
            display: block;
            padding: 0.5rem 1rem;
            color: #e0e8f0;
            font-weight: 500;
            font-size: 0.9rem;
            border-radius: 6px;
            transition: background 0.25s, color 0.25s;
        }
        .main-nav li a:hover {
            background: rgba(230, 126, 34, 0.25);
            color: #fff;
        }
        .main-nav li a i {
            margin-right: 0.3rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: #eef1f7;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce1ec;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.3rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.4rem;
            color: #888;
        }
        .breadcrumb a {
            color: #0a5c8c;
        }
        .breadcrumb .active {
            color: #555;
            font-weight: 600;
        }
        .page-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2rem;
            margin: 2rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .widget {
            background: #fff;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .widget h3 {
            font-size: 1.1rem;
            margin-top: 0;
            margin-bottom: 1rem;
            border-left: 4px solid #e67e22;
            padding-left: 0.7rem;
        }
        .widget ul {
            list-style: none;
            padding: 0;
        }
        .widget ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .widget ul li:last-child {
            border-bottom: none;
        }
        .widget ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .widget ul li a i {
            color: #e67e22;
            width: 1.2rem;
            text-align: center;
        }
        .search-box {
            display: flex;
            gap: 0.4rem;
        }
        .search-box input {
            flex: 1;
            padding: 0.6rem 0.8rem;
            border: 2px solid #dce1ec;
            border-radius: 8px;
            font-size: 0.9rem;
            outline: none;
            transition: border 0.25s;
        }
        .search-box input:focus {
            border-color: #e67e22;
        }
        .search-box button {
            background: #e67e22;
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 0 1rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.25s;
        }
        .search-box button:hover {
            background: #cf6a17;
        }
        .content-card {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.5rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
            margin-bottom: 2rem;
        }
        .content-card .featured-img {
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }
        .highlight-box {
            background: #fef9f2;
            border-left: 5px solid #e67e22;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .highlight-box strong {
            color: #b85e0e;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-item {
            background: #f0f4ff;
            border-radius: 12px;
            padding: 1rem;
            text-align: center;
        }
        .stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #e67e22;
            display: block;
        }
        .stat-item .label {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: #555;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
        table th {
            background: #0a1a2f;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #eef1f7;
        }
        table tr:hover td {
            background: #f8faff;
        }
        .tip-list li {
            margin-bottom: 0.6rem;
        }
        .tip-list li i {
            color: #e67e22;
            margin-right: 0.5rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #dce1ec;
            border-radius: 8px;
            font-family: inherit;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 100px;
            transition: border 0.25s;
        }
        .comment-form textarea:focus {
            border-color: #e67e22;
            outline: none;
        }
        .comment-form .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 0.6rem 0.8rem;
            border: 2px solid #dce1ec;
            border-radius: 8px;
            font-size: 0.9rem;
        }
        .comment-form .form-row input:focus {
            border-color: #e67e22;
            outline: none;
        }
        .comment-form button {
            background: #0a1a2f;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
        }
        .comment-form button:hover {
            background: #e67e22;
        }
        .rating-stars {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
            font-size: 1.8rem;
            margin: 0.5rem 0 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            cursor: pointer;
            color: #ccc;
            transition: color 0.15s;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f1c40f;
        }
        .rating-stars label i {
            pointer-events: none;
        }
        .site-footer {
            background: #0a1a2f;
            color: #bcc8dc;
            padding: 2.5rem 0 1.2rem;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 0.8rem;
            border-bottom: 2px solid #e67e22;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        .site-footer a {
            color: #bcc8dc;
        }
        .site-footer a:hover {
            color: #e67e22;
        }
        friend-link {
            display: block;
            margin-top: 0.5rem;
        }
        friend-link a {
            display: inline-block;
            padding: 0.2rem 0;
        }
        .copyright {
            border-top: 1px solid #1f3550;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: #7a8aa0;
        }
        .copyright strong {
            color: #d4ddee;
        }
        @media (max-width: 992px) {
            .page-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .content-card {
                padding: 1.2rem 1.2rem;
            }
            .header-inner {
                gap: 0.6rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0f2340;
                border-radius: 0 0 12px 12px;
                padding: 0.8rem 0;
                margin-top: 0.6rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li a {
                padding: 0.7rem 1.2rem;
                border-radius: 0;
            }
            .hamburger {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .breadcrumb ol {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.8rem;
            }
            .content-card {
                padding: 1rem 0.9rem;
            }
            .rating-stars {
                font-size: 1.4rem;
            }
            .search-box input {
                font-size: 0.8rem;
            }
        }
        :focus-visible {
            outline: 3px solid #e67e22;
            outline-offset: 2px;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 1rem;
            background: #e67e22;
            color: #fff;
            padding: 0.5rem 1rem;
            border-radius: 0 0 8px 8px;
            z-index: 9999;
            transition: top 0.2s;
        }
        .skip-link:focus {
            top: 0;
        }
        .main-nav {
            transition: display 0.3s ease;
        }
        @media print {
            .site-header,
            .sidebar,
            .breadcrumb,
            .comment-form,
            .rating-stars,
            .site-footer {
                display: none;
            }
            .page-grid {
                display: block;
            }
            .content-card {
                box-shadow: none;
                padding: 0;
            }
        }