*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a2a3a;
            --primary-light: #2c3e50;
            --accent: #e74c3c;
            --accent-hover: #c0392b;
            --gold: #f39c12;
            --gold-light: #f1c40f;
            --bg: #f4f6f9;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-light: #555;
            --border: #ddd;
            --radius: 12px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --font: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding-top: var(--header-height);
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover,
        a:focus {
            color: var(--accent-hover);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--primary);
            color: #fff;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--gold);
            font-size: 1.8rem;
        }
        .my-logo span {
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        nav a {
            color: rgba(255, 255, 255, 0.88);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: all 0.25s;
        }
        nav a:hover,
        nav a:focus {
            color: var(--gold);
            border-bottom-color: var(--gold);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }
        .nav-overlay.active {
            display: block;
        }
        .breadcrumb {
            padding: 16px 0 8px;
            font-size: 0.9rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px 10px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #999;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #0f1a2b 100%);
            color: #fff;
            padding: 60px 0 50px;
            border-radius: 0 0 40px 40px;
            margin-bottom: 40px;
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero h1 i {
            color: var(--gold);
            margin-right: 12px;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            opacity: 0.9;
            margin-bottom: 20px;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 32px;
            font-size: 0.95rem;
            opacity: 0.8;
        }
        .hero .meta i {
            margin-right: 6px;
            color: var(--gold);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding-bottom: 60px;
        }
        .main-content {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 40px 36px;
            box-shadow: var(--shadow);
        }
        .main-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin: 48px 0 16px;
            padding-bottom: 10px;
            border-bottom: 4px solid var(--gold);
        }
        .main-content h2:first-child {
            margin-top: 0;
        }
        .main-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--primary-light);
            margin: 32px 0 12px;
        }
        .main-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 8px;
        }
        .main-content p {
            margin-bottom: 18px;
            color: var(--text);
        }
        .main-content ul,
        .main-content ol {
            margin: 0 0 20px 24px;
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .main-content .highlight {
            background: #fef9e7;
            border-left: 4px solid var(--gold);
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
        }
        .main-content .highlight strong {
            color: var(--accent);
        }
        .main-content .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .main-content .stat-item {
            background: var(--bg);
            padding: 18px 12px;
            border-radius: 10px;
            text-align: center;
            border: 1px solid var(--border);
        }
        .main-content .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
        }
        .main-content .stat-item .label {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            background: var(--bg);
            padding: 10px 16px;
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: center;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--gold);
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            margin-bottom: 10px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
            display: block;
            padding: 4px 0;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 20px 0 10px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
            background: var(--bg);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--gold);
        }
        .search-form button {
            padding: 12px 20px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-form button:hover {
            background: var(--accent-hover);
        }
        .feedback-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid var(--border);
        }
        .feedback-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .comment-form,
        .rating-form {
            background: var(--bg);
            padding: 24px;
            border-radius: var(--radius);
            margin-bottom: 24px;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            resize: vertical;
            min-height: 100px;
            font-family: var(--font);
            transition: border 0.3s;
            background: #fff;
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--gold);
        }
        .comment-form input[type="text"] {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            margin: 8px 0 14px;
            transition: border 0.3s;
            background: #fff;
        }
        .comment-form input[type="text"]:focus {
            outline: none;
            border-color: var(--gold);
        }
        .comment-form .row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .comment-form button,
        .rating-form button {
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            font-weight: 600;
        }
        .comment-form button:hover,
        .rating-form button:hover {
            background: var(--primary-light);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin: 12px 0 18px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: var(--border);
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--gold);
        }
        .rating-form .current-score {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 8px;
        }
        footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 32px;
            margin-top: 20px;
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        footer h4 {
            color: var(--gold);
            font-size: 1.1rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        footer a {
            color: rgba(255, 255, 255, 0.8);
        }
        footer a:hover {
            color: var(--gold);
            text-decoration: underline;
        }
        footer ul {
            list-style: none;
            padding: 0;
        }
        footer li {
            margin-bottom: 8px;
        }
        footer .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 24px;
            margin-top: 16px;
            text-align: center;
            font-size: 0.9rem;
            opacity: 0.8;
        }
        friend-link {
            display: block;
            margin-top: 8px;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 6px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            footer .container {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 62px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                padding: 20px 24px;
                gap: 12px;
                transform: translateY(-120%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 1001;
                box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
                border-radius: 0 0 16px 16px;
            }
            nav.open {
                transform: translateY(0);
            }
            nav a {
                font-size: 1.05rem;
                padding: 10px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                width: 100%;
            }
            .hamburger {
                display: block;
            }
            .hero {
                padding: 40px 0 32px;
                border-radius: 0 0 28px 28px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .main-content {
                padding: 24px 18px;
            }
            .main-content h2 {
                font-size: 1.4rem;
            }
            .main-content h3 {
                font-size: 1.15rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .comment-form .row {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 12px 0 4px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.4rem;
            }
            .main-content {
                padding: 18px 14px;
            }
            .main-content .stat-box {
                grid-template-columns: 1fr 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .last-updated i {
            color: var(--accent);
        }