*,
        *::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, BlinkMacSystemFont, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
        }
        a {
            color: #0f4c81;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #c0392b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0f4c81 0%, #1a1a2e 100%);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            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;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f9d423, #ff4e50);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo span {
            font-size: 1rem;
            font-weight: 400;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.7);
            display: block;
            font-size: 0.7rem;
            letter-spacing: 1px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: #fff;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: background 0.3s, color 0.3s;
            white-space: nowrap;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #f9d423;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 10px 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce3ed;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #888;
            margin-right: 6px;
        }
        .breadcrumb a {
            color: #0f4c81;
        }
        .breadcrumb .active {
            color: #555;
            font-weight: 500;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        .article-content {
            background: #fff;
            border-radius: 20px;
            padding: 36px 32px;
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.04);
        }
        .article-content h1 {
            font-size: 2.4rem;
            line-height: 1.25;
            margin-bottom: 12px;
            color: #0f4c81;
        }
        .article-content h2 {
            font-size: 1.7rem;
            margin-top: 44px;
            margin-bottom: 16px;
            color: #1a1a2e;
            border-left: 5px solid #f9d423;
            padding-left: 16px;
        }
        .article-content h3 {
            font-size: 1.3rem;
            margin-top: 32px;
            margin-bottom: 10px;
            color: #2c3e50;
        }
        .article-content h4 {
            font-size: 1.1rem;
            margin-top: 20px;
            margin-bottom: 8px;
            color: #34495e;
            font-weight: 600;
        }
        .article-content p {
            margin-bottom: 18px;
            font-size: 1.02rem;
            color: #2d3436;
        }
        .article-content ul,
        .article-content ol {
            margin: 12px 0 20px 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content strong {
            color: #0f4c81;
        }
        .article-content .highlight-box {
            background: #fef9e7;
            border-left: 4px solid #f9d423;
            padding: 18px 22px;
            border-radius: 12px;
            margin: 24px 0;
        }
        .article-content .highlight-box strong {
            color: #c0392b;
        }
        .article-content .emoji-lg {
            font-size: 1.3rem;
        }
        .featured-image {
            margin: 28px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .featured-image figcaption {
            background: #f1f3f6;
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #555;
            text-align: center;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 22px 20px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: #0f4c81;
            border-bottom: 2px solid #eef2f7;
            padding-bottom: 8px;
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 8px;
        }
        .sidebar-card ul li a {
            font-size: 0.92rem;
            display: block;
            padding: 4px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .sidebar-card ul li a:hover {
            color: #c0392b;
        }
        .search-form {
            display: flex;
            gap: 8px;
            width: 100%;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #dce3ed;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: #0f4c81;
        }
        .search-form button {
            background: #0f4c81;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 20px;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #1a1a2e;
        }
        .comment-section,
        .rating-section {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 2px solid #eef2f7;
        }
        .comment-section h3,
        .rating-section h3 {
            font-size: 1.4rem;
            color: #0f4c81;
            margin-bottom: 16px;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #dce3ed;
            border-radius: 14px;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
            transition: border 0.3s;
        }
        .comment-form textarea:focus {
            border-color: #0f4c81;
            outline: none;
        }
        .comment-form .form-row {
            display: flex;
            gap: 12px;
            margin-top: 10px;
            flex-wrap: wrap;
        }
        .comment-form .form-row input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #dce3ed;
            border-radius: 30px;
            font-size: 0.9rem;
            min-width: 160px;
        }
        .comment-form .form-row input:focus {
            border-color: #0f4c81;
            outline: none;
        }
        .comment-form button {
            background: #0f4c81;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 28px;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.3s;
            margin-top: 10px;
        }
        .comment-form button:hover {
            background: #1a1a2e;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            margin: 10px 0 16px;
        }
        .rating-stars .star {
            transition: color 0.2s, transform 0.2s;
        }
        .rating-stars .star.active,
        .rating-stars .star:hover {
            color: #f9d423;
            transform: scale(1.08);
        }
        .rating-form button {
            background: #27ae60;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 28px;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .rating-form button:hover {
            background: #1e8449;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccd;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }
        @media (max-width: 700px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-inner h4 {
            color: #f9d423;
            margin-bottom: 12px;
            font-size: 1.1rem;
        }
        .footer-inner p,
        .footer-inner a {
            color: #bbccdd;
            font-size: 0.9rem;
        }
        .footer-inner a:hover {
            color: #f9d423;
        }
        friend-link {
            display: block;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #2a2a4a;
            font-size: 0.9rem;
        }
        friend-link a {
            color: #88bbdd;
            margin: 0 6px;
        }
        friend-link a:hover {
            color: #f9d423;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            margin-top: 24px;
            border-top: 1px solid #2a2a4a;
            font-size: 0.82rem;
            color: #8899aa;
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(26, 26, 46, 0.96);
                border-radius: 16px;
                padding: 16px 12px;
                margin-top: 10px;
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                display: block;
                padding: 10px 16px;
                border-radius: 8px;
            }
            .hamburger {
                display: block;
            }
            .article-content {
                padding: 22px 16px;
            }
            .article-content h1 {
                font-size: 1.7rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .main-grid {
                padding: 20px 0;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 6px 0;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .sidebar {
                order: 2;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .article-content {
                padding: 16px 12px;
            }
            .search-form {
                flex-wrap: wrap;
            }
            .search-form input {
                min-width: 120px;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.78rem;
            color: #555;
            margin-bottom: 16px;
        }
        .table-of-contents {
            background: #f8f9fb;
            border-radius: 14px;
            padding: 18px 22px;
            margin: 20px 0 28px;
        }
        .table-of-contents h3 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .table-of-contents ol {
            margin: 8px 0 0 20px;
        }
        .table-of-contents ol li {
            margin-bottom: 4px;
        }
        .table-of-contents ol li a {
            color: #0f4c81;
        }
        .btn-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #0f4c81;
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: background 0.3s, transform 0.3s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .btn-top:hover {
            background: #1a1a2e;
            transform: translateY(-4px);
        }
        @media (max-width: 600px) {
            .btn-top {
                width: 38px;
                height: 38px;
                font-size: 1rem;
                right: 16px;
                bottom: 16px;
            }
        }