* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, Arial, sans-serif;
            background: #f4f7fc;
            color: #1e2a3a;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #0077b6;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #023e8a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0b1a2e, #1a3a5c);
            color: #fff;
            padding: 18px 0;
            border-bottom: 4px solid #f9a825;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: 1px;
            color: #fff;
            text-transform: uppercase;
            text-shadow: 2px 2px 0 #f9a825;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #fff;
        }
        .my-logo small {
            display: block;
            font-size: 12px;
            font-weight: 300;
            letter-spacing: 2px;
            color: #b0c4de;
            text-shadow: none;
            text-transform: lowercase;
        }
        .hamburger {
            display: none;
            font-size: 28px;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        nav {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            color: #e0e8f0;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
            white-space: nowrap;
        }
        nav a:hover {
            background: #f9a825;
            color: #0b1a2e;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 10px 0;
            font-size: 13px;
            color: #555;
            border-bottom: 1px solid #dce1e8;
        }
        .breadcrumb a {
            color: #0077b6;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 6px;
            color: #999;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 36px;
            font-weight: 800;
            color: #0b1a2e;
            line-height: 1.2;
            margin-bottom: 12px;
            border-left: 5px solid #f9a825;
            padding-left: 18px;
        }
        .article-body .meta {
            color: #666;
            font-size: 14px;
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .article-body .meta i {
            margin-right: 5px;
            color: #f9a825;
        }
        .article-body h2 {
            font-size: 28px;
            font-weight: 700;
            color: #0b1a2e;
            margin: 36px 0 14px;
            padding-bottom: 8px;
            border-bottom: 2px solid #e0e7ef;
        }
        .article-body h3 {
            font-size: 22px;
            font-weight: 600;
            color: #1a3a5c;
            margin: 28px 0 10px;
        }
        .article-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: #2a4a6c;
            margin: 20px 0 8px;
        }
        .article-body p {
            margin-bottom: 16px;
            text-align: justify;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 18px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body .feature-box {
            background: #ffffff;
            border-radius: 14px;
            padding: 24px 28px;
            margin: 24px 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            border-left: 4px solid #f9a825;
        }
        .article-body .feature-box h3 {
            margin-top: 0;
        }
        .article-body .highlight {
            background: #fff8e1;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            color: #b76e00;
        }
        .article-body .emoji-lg {
            font-size: 28px;
            vertical-align: middle;
            margin-right: 6px;
        }
        .article-image {
            margin: 28px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .article-image img {
            width: 100%;
            border-radius: 14px;
        }
        .article-image figcaption {
            background: #f0f4f9;
            padding: 10px 16px;
            font-size: 13px;
            color: #555;
            text-align: center;
            border-radius: 0 0 14px 14px;
        }
        .download-btn {
            display: inline-block;
            background: #f9a825;
            color: #0b1a2e;
            padding: 14px 40px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 700;
            transition: all 0.25s;
            box-shadow: 0 4px 14px rgba(249, 168, 37, 0.35);
            margin: 12px 0 20px;
            border: none;
            cursor: pointer;
        }
        .download-btn:hover {
            background: #e69500;
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(249, 168, 37, 0.45);
            text-decoration: none;
            color: #0b1a2e;
        }
        .download-btn i {
            margin-right: 10px;
        }
        .link-list {
            background: #f0f4f9;
            border-radius: 12px;
            padding: 18px 22px;
            margin: 20px 0;
        }
        .link-list li {
            list-style: none;
            padding: 6px 0;
            border-bottom: 1px solid #dce1e8;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            font-weight: 500;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 14px;
            padding: 22px 20px;
            margin-bottom: 24px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 14px;
            padding-bottom: 8px;
            border-bottom: 2px solid #f9a825;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 6px 0;
        }
        .sidebar-card a {
            font-size: 14px;
        }
        .search-box {
            display: flex;
            gap: 8px;
            margin-top: 10px;
        }
        .search-box input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #dce1e8;
            border-radius: 50px;
            font-size: 14px;
            outline: none;
            transition: border 0.2s;
        }
        .search-box input:focus {
            border-color: #f9a825;
        }
        .search-box button {
            background: #f9a825;
            color: #0b1a2e;
            border: none;
            border-radius: 50px;
            padding: 10px 22px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-box button:hover {
            background: #e69500;
        }
        .comment-section,
        .rating-section {
            background: #fff;
            border-radius: 14px;
            padding: 28px 30px;
            margin: 40px 0 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
        }
        .comment-section h2,
        .rating-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 18px;
            border-bottom: 2px solid #f9a825;
            padding-bottom: 10px;
        }
        .comment-section form,
        .rating-section form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .comment-section input,
        .comment-section textarea,
        .rating-section input,
        .rating-section select {
            padding: 12px 16px;
            border: 2px solid #dce1e8;
            border-radius: 10px;
            font-size: 14px;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .comment-section input:focus,
        .comment-section textarea:focus,
        .rating-section input:focus,
        .rating-section select:focus {
            border-color: #f9a825;
        }
        .comment-section textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-section button,
        .rating-section button {
            align-self: flex-start;
            background: #0077b6;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .comment-section button:hover,
        .rating-section button:hover {
            background: #023e8a;
        }
        .rating-stars {
            display: flex;
            gap: 4px;
            font-size: 28px;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            cursor: pointer;
            transition: color 0.2s;
            color: #ddd;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f9a825;
        }
        footer {
            background: #0b1a2e;
            color: #c0ccdd;
            padding: 40px 0 20px;
            border-top: 4px solid #f9a825;
        }
        footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 24px;
        }
        @media (max-width: 768px) {
            footer .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        footer h4 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 8px;
        }
        footer a {
            color: #b0c4de;
        }
        footer a:hover {
            color: #f9a825;
        }
        .friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            padding: 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 20px;
        }
        .friend-link a {
            font-size: 13px;
            color: #8aa0b8;
        }
        .friend-link a:hover {
            color: #f9a825;
        }
        footer .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: #7a8ea8;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #0f2440;
                padding: 16px 12px;
                border-radius: 12px;
                margin-top: 12px;
                gap: 4px;
            }
            nav.show {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 8px;
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            .article-body h1 {
                font-size: 26px;
            }
            .article-body h2 {
                font-size: 22px;
            }
            .article-body h3 {
                font-size: 18px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .my-logo {
                font-size: 22px;
            }
            .article-body h1 {
                font-size: 22px;
                padding-left: 12px;
            }
            .download-btn {
                padding: 12px 28px;
                font-size: 16px;
                width: 100%;
                text-align: center;
            }
            .comment-section,
            .rating-section {
                padding: 18px 16px;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .text-center {
            text-align: center;
        }