* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --accent: #e8451c;
            --accent-light: #ff6b3d;
            --bg: #f4f7fa;
            --card-bg: #ffffff;
            --text: #222;
            --text-light: #555;
            --border: #dce3ed;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 70px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: 0.2s;
        }
        a:hover {
            color: var(--accent);
        }
        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 {
            background: var(--primary);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            gap: 20px;
        }
        .my-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo span {
            color: var(--accent-light);
        }
        .my-logo:hover {
            color: #fff;
            opacity: 0.92;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px;
            align-items: center;
        }
        .nav-list li a {
            color: #e8edf4;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: 0.2s;
            display: block;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .nav-list li a.active {
            background: var(--accent);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.7rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 0.85rem;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb i {
            font-size: 0.65rem;
            color: #999;
        }
        .breadcrumb span {
            color: var(--text-light);
        }
        main {
            padding: 30px 0 50px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .content h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .content .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 24px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 16px;
        }
        .content .meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        .content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 40px;
            margin-bottom: 14px;
            border-left: 5px solid var(--accent);
            padding-left: 16px;
        }
        .content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 30px;
            margin-bottom: 10px;
        }
        .content h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #1a4a6a;
            margin-top: 22px;
            margin-bottom: 8px;
        }
        .content p {
            margin-bottom: 16px;
            text-align: justify;
        }
        .content .featured-image {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--card-bg);
            padding: 8px;
        }
        .content .featured-image img {
            width: 100%;
            border-radius: calc(var(--radius) - 6px);
        }
        .content .featured-image figcaption {
            padding: 10px 8px 4px;
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            font-style: italic;
        }
        .content ul,
        .content ol {
            margin: 12px 0 20px 24px;
        }
        .content li {
            margin-bottom: 8px;
        }
        .content blockquote {
            border-left: 4px solid var(--accent);
            background: #f0f4fa;
            padding: 16px 22px;
            margin: 20px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: #2a3a4a;
        }
        .content blockquote strong {
            color: var(--primary);
        }
        .content .highlight-box {
            background: linear-gradient(135deg, #eaf0f8, #f4f7fc);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 24px 0;
            border: 1px solid var(--border);
        }
        .content .highlight-box i {
            color: var(--accent);
            margin-right: 8px;
        }
        .content .btn-link {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 6px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: 0.25s;
            margin: 4px 0;
        }
        .content .btn-link:hover {
            background: var(--accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 69, 28, 0.35);
        }
        .content .inline-link {
            font-weight: 600;
            border-bottom: 2px solid var(--accent-light);
            padding-bottom: 1px;
        }
        .content .inline-link:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--accent);
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
            display: block;
        }
        .sidebar-card ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 6px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid var(--border);
            border-radius: 30px;
            font-size: 0.9rem;
            outline: none;
            transition: 0.2s;
            background: #f9fbfd;
        }
        .search-form input:focus {
            border-color: var(--primary-light);
            background: #fff;
        }
        .search-form button {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 20px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            font-size: 0.9rem;
        }
        .search-form button:hover {
            background: var(--accent-light);
            transform: scale(1.02);
        }
        .comment-area,
        .rating-area {
            margin-top: 10px;
        }
        .comment-area textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 12px;
            font-family: var(--font);
            font-size: 0.9rem;
            resize: vertical;
            min-height: 80px;
            outline: none;
            transition: 0.2s;
            background: #f9fbfd;
        }
        .comment-area textarea:focus {
            border-color: var(--primary-light);
            background: #fff;
        }
        .comment-area .btn-submit,
        .rating-area .btn-submit {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 26px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .comment-area .btn-submit:hover,
        .rating-area .btn-submit:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(26, 58, 92, 0.3);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            cursor: pointer;
            margin: 8px 0;
            direction: ltr;
        }
        .star-rating i {
            transition: 0.15s;
            color: #ddd;
        }
        .star-rating i.active,
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #f5b342;
        }
        .star-rating i.active {
            color: #f5b342;
        }
        .rating-area .score-display {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        footer {
            background: var(--primary);
            color: #d0dbe8;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-grid p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: #b0c4d8;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid ul li {
            padding: 4px 0;
        }
        .footer-grid ul li a {
            color: #b0c4d8;
            font-size: 0.9rem;
        }
        .footer-grid ul li a:hover {
            color: var(--accent-light);
        }
        friend-link {
            display: block;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.9rem;
            color: #b0c4d8;
        }
        friend-link a {
            color: #b0c4d8;
            margin: 0 6px;
        }
        friend-link a:hover {
            color: var(--accent-light);
        }
        .copyright {
            text-align: center;
            padding-top: 22px;
            font-size: 0.85rem;
            color: #8aa4bc;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 20px;
        }
        .copyright strong {
            color: #c8d8e8;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-h: 60px;
            }
            .header-inner {
                padding: 0 14px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--primary);
                padding: 18px 20px 24px;
                border-radius: 0 0 20px 20px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
                gap: 4px;
                z-index: 999;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: 10px;
            }
            .hamburger {
                display: block;
            }
            .content h1 {
                font-size: 1.7rem;
            }
            .content h2 {
                font-size: 1.4rem;
            }
            .content h3 {
                font-size: 1.15rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .sidebar {
                order: 2;
            }
            .content .meta {
                font-size: 0.8rem;
                gap: 10px;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .content h1 {
                font-size: 1.4rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        .lazy-load {
            opacity: 0;
            transition: opacity 0.4s;
        }
        .lazy-load.loaded {
            opacity: 1;
        }
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent);
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(232, 69, 28, 0.3);
            cursor: pointer;
            transition: 0.25s;
            border: none;
            z-index: 900;
            opacity: 0;
            pointer-events: none;
        }
        .back-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .back-top:hover {
            transform: translateY(-4px);
            background: var(--accent-light);
            box-shadow: 0 8px 30px rgba(232, 69, 28, 0.4);
        }