*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #ff6b35;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            color: #0b1a2e;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.9rem;
            border-bottom: 3px solid #e0a800;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.5rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.2rem;
            color: #2c4a6e;
        }
        p {
            margin-bottom: 1.1rem;
            font-size: 1.05rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1e3a5f 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
        }
        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd700;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
            transition: transform 0.2s ease;
        }
        .my-logo:hover {
            transform: scale(1.03);
            color: #ffe44d;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            display: block;
            color: #aac4e0;
            font-weight: 400;
            letter-spacing: 0.5px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #ffd700;
            color: #ffd700;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 215, 0, 0.15);
        }
        .main-nav {
            display: flex;
            gap: 1.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e8f0fe;
            font-weight: 500;
            padding: 0.4rem 0.6rem;
            border-radius: 4px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            background: rgba(255, 215, 0, 0.2);
            color: #ffd700;
            text-decoration: none;
        }
        .main-nav a.active {
            color: #ffd700;
            border-bottom: 2px solid #ffd700;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d7de;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #2c4a6e;
        }
        .breadcrumb a:hover {
            color: #ff6b35;
        }
        .breadcrumb span {
            color: #6b7a8f;
        }
        .hero {
            background: linear-gradient(145deg, #0f2a44, #1b3b5c);
            color: #fff;
            padding: 2.8rem 0 2.2rem;
            text-align: center;
        }
        .hero h1 {
            color: #ffd700;
            font-size: 2.8rem;
            margin-bottom: 0.5rem;
            text-shadow: 0 3px 12px rgba(0, 0, 0, 0.6);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 780px;
            margin: 0.6rem auto 1.2rem;
            color: #dce6f0;
        }
        .hero .last-updated {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.9rem;
            color: #ffd700;
            border: 1px solid rgba(255, 215, 0, 0.3);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 14px;
            padding: 1.6rem 1.4rem;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
            height: fit-content;
            position: sticky;
            top: 90px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #e0a800;
            padding-bottom: 0.4rem;
            margin-bottom: 1rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            margin-bottom: 0.6rem;
        }
        .sidebar ul li a {
            font-size: 0.95rem;
            display: block;
            padding: 0.3rem 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar ul li a:hover {
            padding-left: 0.3rem;
        }
        .article-body h2 {
            margin-top: 2.8rem;
        }
        .article-body h3 {
            margin-top: 2rem;
        }
        .article-body h4 {
            margin-top: 1.4rem;
        }
        .article-body p,
        .article-body li {
            font-size: 1.05rem;
        }
        .highlight-box {
            background: #f0f6ff;
            border-left: 5px solid #e0a800;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .highlight-box strong {
            color: #0b1a2e;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #f8fafc;
            border: 1px solid #dde3ed;
            border-radius: 12px;
            padding: 1rem;
            text-align: center;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #0b1a2e;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #4a5a72;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .feature-image {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .feature-image figcaption {
            background: #f0f4f9;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #2c4a6e;
            text-align: center;
            font-style: italic;
        }
        .btn {
            display: inline-block;
            background: #e0a800;
            color: #0b1a2e;
            padding: 0.5rem 1.6rem;
            border-radius: 30px;
            font-weight: 600;
            transition: background 0.25s, transform 0.2s;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background: #ffc107;
            transform: translateY(-2px);
            text-decoration: none;
            color: #0b1a2e;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #e0a800;
            color: #e0a800;
        }
        .btn-outline:hover {
            background: #e0a800;
            color: #0b1a2e;
        }
        .pro-con {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 1.8rem 0;
        }
        .pro-con .pros {
            background: #e6f7e6;
            border-radius: 14px;
            padding: 1.2rem 1.6rem;
            border-left: 5px solid #2e7d32;
        }
        .pro-con .cons {
            background: #fde8e8;
            border-radius: 14px;
            padding: 1.2rem 1.6rem;
            border-left: 5px solid #c62828;
        }
        .pro-con h4 {
            margin-top: 0;
        }
        .pro-con ul {
            list-style: none;
            padding: 0;
        }
        .pro-con ul li {
            padding: 0.3rem 0;
        }
        .pro-con ul li::before {
            content: "✔️ ";
        }
        .pro-con .cons ul li::before {
            content: "❌ ";
        }
        .form-section {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            margin: 2.2rem 0;
        }
        .form-section h3 {
            margin-top: 0;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1a2a3a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #d0d7de;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.2s;
            background: #fafcff;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #e0a800;
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d0d7de;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b400;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c8d6e5;
            padding: 2.5rem 0 1.2rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .footer-inner h4 {
            color: #ffd700;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-inner a {
            color: #aac4e0;
        }
        .footer-inner a:hover {
            color: #ffd700;
        }
        .footer-inner friend-link {
            display: block;
            margin-top: 0.4rem;
        }
        .footer-inner friend-link a {
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.3rem;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid #1e3a5f;
            padding-top: 1.4rem;
            margin-top: 1.8rem;
            font-size: 0.9rem;
            color: #8a9bb0;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 2rem;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.5rem;
                padding-top: 0.8rem;
                border-top: 1px solid rgba(255, 255, 255, 0.15);
                margin-top: 0.8rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.5rem 0.8rem;
                font-size: 1rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .pro-con {
                grid-template-columns: 1fr;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.3rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 0.8rem;
            }
            .form-section {
                padding: 1.2rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-center {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.8rem;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }