*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1e1e2f;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #1e6bb8;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #0f3b6a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
            color: #0f172a;
        }
        h1 {
            font-size: 2rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.6rem;
            margin-bottom: 0.6rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }
        h4 {
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 16px;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 0;
            background: #1e6bb8;
            color: #fff;
            padding: 0.6rem 1.2rem;
            z-index: 10000;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1a1a3e 100%);
            color: #fff;
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 999;
            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;
            gap: 10px;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            color: #facc15;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #fde047;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #f97316;
        }
        .my-logo span {
            font-size: 0.85rem;
            font-weight: 400;
            color: #94a3b8;
            display: block;
            line-height: 1.2;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e2e8f0;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #facc15;
            color: #0f172a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-overlay {
            display: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 10px 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 8px;
            color: #64748b;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1e6bb8;
        }
        .breadcrumb .current {
            color: #334155;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 40px 0 48px;
            margin-bottom: 32px;
            border-radius: 0 0 36px 36px;
        }
        .hero h1 {
            color: #facc15;
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .hero .subtitle {
            font-size: 1.1rem;
            color: #cbd5e1;
            max-width: 720px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 36px;
            margin-top: 16px;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .hero-meta i {
            margin-right: 6px;
            color: #f97316;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 36px;
            margin: 28px 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 18px;
            padding: 22px 20px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
            margin-bottom: 24px;
            border: 1px solid #e9edf2;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            border-bottom: 2px solid #f1f5f9;
            padding-bottom: 8px;
            margin-bottom: 12px;
            color: #0f172a;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            padding: 6px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card a i {
            color: #f97316;
            font-size: 0.8rem;
        }
        .article-card {
            background: #fff;
            border-radius: 20px;
            padding: 28px 24px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
            margin-bottom: 28px;
            border: 1px solid #eef2f6;
        }
        .article-card h2 {
            margin-top: 1.8rem;
        }
        .article-card h2:first-child {
            margin-top: 0;
        }
        .featured-image {
            margin: 20px 0 24px;
            border-radius: 14px;
            overflow: hidden;
            background: #e2e8f0;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            max-height: 480px;
        }
        .featured-image figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #475569;
            background: #f8fafc;
            border-top: 1px solid #e2e8f0;
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 5px solid #facc15;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 18px 0;
            font-size: 0.92rem;
        }
        .data-table th {
            background: #0f172a;
            color: #facc15;
            padding: 10px 12px;
            text-align: left;
        }
        .data-table td {
            padding: 9px 12px;
            border-bottom: 1px solid #e2e8f0;
        }
        .data-table tr:nth-child(even) {
            background: #f8fafc;
        }
        .data-table tr:hover {
            background: #eef2f6;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #0f172a;
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: background 0.25s, transform 0.2s;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background: #1e293b;
            transform: translateY(-2px);
            text-decoration: none;
            color: #facc15;
        }
        .btn i {
            font-size: 1rem;
        }
        .form-card {
            background: #fff;
            border-radius: 20px;
            padding: 24px 22px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
            margin-bottom: 28px;
            border: 1px solid #eef2f6;
        }
        .form-card h3 {
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.92rem;
            color: #1e293b;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 11px 14px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.25s;
            background: #fafbfc;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #f97316;
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .form-row .form-group {
            flex: 1;
            min-width: 140px;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.7rem;
            cursor: pointer;
            color: #d1d5db;
            transition: color 0.15s;
        }
        .star-rating i.active,
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #facc15;
        }
        .star-rating i {
            transition: color 0.15s, transform 0.15s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .comment-item {
            padding: 14px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 700;
            color: #0f172a;
        }
        .comment-date {
            font-size: 0.8rem;
            color: #64748b;
            margin-left: 10px;
        }
        .comment-body {
            margin-top: 4px;
            color: #334155;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 36px 0 20px;
            margin-top: 40px;
            border-radius: 32px 32px 0 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
        }
        .footer-inner h4 {
            color: #facc15;
            margin-bottom: 12px;
            font-size: 1.05rem;
        }
        .footer-inner a {
            color: #94a3b8;
            display: inline-block;
            margin-bottom: 4px;
        }
        .footer-inner a:hover {
            color: #facc15;
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 18px;
            margin-top: 28px;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-bottom .copyright {
            font-weight: 500;
            color: #94a3b8;
        }
        friend-link {
            display: block;
            margin: 12px 0;
        }
        friend-link a {
            display: inline-block;
            padding: 4px 10px;
            margin: 2px 4px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            font-size: 0.9rem;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        @media (max-width: 900px) {
            .content-area {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 700px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0f172a;
                padding: 12px 0 16px;
                border-radius: 0 0 20px 20px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 18px;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .hamburger {
                display: block;
            }
            .nav-overlay.open {
                display: block;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.3);
                z-index: -1;
            }
            .hero {
                padding: 28px 0 32px;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .article-card {
                padding: 18px 14px;
            }
            .form-card {
                padding: 16px 14px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .data-table {
                font-size: 0.78rem;
            }
            .data-table th,
            .data-table td {
                padding: 6px 6px;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 420px) {
            .form-row {
                flex-direction: column;
                gap: 0;
            }
            .hero-meta {
                flex-direction: column;
                gap: 4px;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }