* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f5f7fc;
            color: #1a1a2e;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #1e3a8a;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #f59e0b;
            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(145deg, #0f172a 0%, #1e293b 100%);
            padding: 14px 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;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 12px rgba(251, 191, 36, 0.2);
        }
        .my-logo i {
            -webkit-text-fill-color: #fbbf24;
            margin-right: 6px;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-list a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-list a:hover {
            color: #fbbf24;
            border-bottom-color: #fbbf24;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #fbbf24;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px 8px;
        }
        .breadcrumb {
            background: #e9edf5;
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 4px;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 8px;
            color: #64748b;
        }
        .breadcrumb a {
            color: #1e3a8a;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0f172a;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-body h1 i {
            color: #f59e0b;
            margin-right: 10px;
        }
        .article-body .meta {
            color: #64748b;
            font-size: 0.95rem;
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-body .meta i {
            margin-right: 6px;
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #0f172a;
            margin-top: 48px;
            margin-bottom: 16px;
            border-left: 5px solid #f59e0b;
            padding-left: 16px;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1e293b;
            margin-top: 32px;
            margin-bottom: 10px;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #334155;
            margin-top: 22px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 18px;
            color: #1f2937;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
            color: #1f2937;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body strong {
            color: #0f172a;
        }
        .article-body .highlight-box {
            background: #fef9e7;
            border-left: 6px solid #f59e0b;
            padding: 20px 24px;
            border-radius: 10px;
            margin: 24px 0;
        }
        .article-body .highlight-box i {
            color: #f59e0b;
            margin-right: 8px;
        }
        .article-body .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .article-body .stat-card {
            background: #ffffff;
            padding: 18px 14px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            text-align: center;
            border: 1px solid #e2e8f0;
        }
        .article-body .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #f59e0b;
        }
        .article-body .stat-card .label {
            color: #475569;
            font-size: 0.9rem;
        }
        .article-body .image-wrapper {
            margin: 30px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .article-body .image-wrapper figcaption {
            background: #f1f5f9;
            padding: 10px 16px;
            font-size: 0.9rem;
            color: #475569;
            text-align: center;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 22px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 16px;
            border-bottom: 2px solid #f59e0b;
            padding-bottom: 10px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 12px;
        }
        .sidebar li a {
            color: #1e3a8a;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar li a::before {
            content: "▸";
            color: #f59e0b;
            font-weight: 700;
        }
        .sidebar li a:hover {
            color: #f59e0b;
            text-decoration: none;
        }
        .search-section {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 22px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            margin-bottom: 30px;
        }
        .search-section h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #0f172a;
        }
        .search-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: 0.2s;
        }
        .search-form input:focus {
            border-color: #f59e0b;
        }
        .search-form button {
            padding: 12px 28px;
            background: #f59e0b;
            border: none;
            border-radius: 40px;
            color: #0f172a;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #d97706;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 40px;
        }
        @media (max-width: 768px) {
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 22px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
        }
        .feedback-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0f172a;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: 0.2s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #f59e0b;
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card button {
            padding: 12px 24px;
            background: #1e3a8a;
            border: none;
            border-radius: 40px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.2s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #f59e0b;
            color: #0f172a;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .rating-stars i.active {
            color: #f59e0b;
        }
        .rating-stars i:hover {
            color: #fbbf24;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 40px 0 30px;
            margin-top: 60px;
        }
        .site-footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        @media (max-width: 768px) {
            .site-footer .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .site-footer h4 {
            color: #fbbf24;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #fbbf24;
        }
        .site-footer .friend-link {
            display: block;
            padding: 6px 0;
        }
        .site-footer .friend-link a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .friend-link a::before {
            content: "🔗";
            font-size: 0.8rem;
        }
        .site-footer .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #1e293b;
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 10px;
                padding: 16px 0 8px;
                align-items: flex-start;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                font-size: 1rem;
                padding: 8px 0;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
        }
        .text-muted {
            color: #64748b;
        }
        .mt-2 {
            margin-top: 12px;
        }
        .mb-2 {
            margin-bottom: 12px;
        }
        .flex {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .gap-1 {
            gap: 8px;
        }
        .wrap {
            flex-wrap: wrap;
        }