*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: linear-gradient(135deg, #0a0e27 0%, #1a1a3a 50%, #0d1117 100%);
            color: #e8e6f0;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #00c8ff;
            text-decoration: none;
            transition: color 0.2s, text-shadow 0.2s;
        }
        a:hover {
            color: #ffd700;
            text-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
        }
        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
            flex: 1;
        }
        header {
            background: rgba(10, 14, 39, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 2px solid #00c8ff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 30px rgba(0, 200, 255, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: 1320px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8em;
            font-weight: 900;
            background: linear-gradient(90deg, #00c8ff, #ffd700);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -1px;
            font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
            text-shadow: none;
            transition: transform 0.3s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.03);
            color: #00c8ff;
            text-shadow: none;
            -webkit-text-fill-color: transparent;
        }
        .my-logo small {
            font-size: 0.5em;
            vertical-align: middle;
            margin-left: 8px;
            background: #ffd700;
            -webkit-background-clip: border-box;
            background-clip: border-box;
            -webkit-text-fill-color: #0a0e27;
            padding: 2px 8px;
            border-radius: 12px;
            font-weight: 800;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #00c8ff;
            color: #00c8ff;
            font-size: 1.5em;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .nav-toggle:hover {
            background: rgba(0, 200, 255, 0.15);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-menu li a {
            display: block;
            padding: 10px 16px;
            color: #c0c8e0;
            font-weight: 600;
            font-size: 0.95em;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .nav-menu li a:hover {
            background: rgba(0, 200, 255, 0.12);
            color: #00c8ff;
        }
        @media (max-width: 900px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 15px 0;
                border-top: 1px solid rgba(0, 200, 255, 0.2);
                margin-top: 10px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 14px 20px;
            }
        }
        .breadcrumb {
            padding: 14px 0;
            font-size: 0.88em;
            color: #8890aa;
            background: transparent;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 8px;
            color: #555e7c;
        }
        .breadcrumb a {
            color: #00c8ff;
        }
        .breadcrumb li[aria-current="page"] {
            color: #ffd700;
        }
        main {
            padding-bottom: 40px;
        }
        h1 {
            font-size: clamp(1.8em, 4vw, 2.6em);
            line-height: 1.2;
            margin: 20px 0 16px;
            font-weight: 800;
            color: #ffffff;
            border-left: 4px solid #ffd700;
            padding-left: 18px;
        }
        h2 {
            font-size: clamp(1.5em, 3vw, 2em);
            margin: 48px 0 16px;
            color: #00c8ff;
            padding-bottom: 8px;
            border-bottom: 2px solid rgba(0, 200, 255, 0.3);
            font-weight: 700;
        }
        h3 {
            font-size: 1.25em;
            margin: 30px 0 12px;
            color: #ffd700;
            font-weight: 600;
        }
        h4 {
            font-size: 1.05em;
            margin: 20px 0 10px;
            color: #b0c0e0;
            font-weight: 600;
        }
        p {
            margin: 14px 0;
            color: #c5cbe0;
            font-size: 1em;
            line-height: 1.8;
        }
        .hero {
            background: linear-gradient(135deg, rgba(0, 200, 255, 0.13), rgba(255, 215, 0, 0.08));
            border-radius: 24px;
            padding: clamp(28px, 5vw, 56px);
            margin: 28px 0;
            border: 1px solid rgba(0, 200, 255, 0.25);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 200, 255, 0.2), transparent 70%);
            pointer-events: none;
        }
        .hero h1 {
            border: none;
            padding-left: 0;
            font-size: clamp(2em, 5vw, 3.2em);
            background: linear-gradient(135deg, #fff, #00c8ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin: 0 0 16px;
        }
        .hero p {
            font-size: 1.15em;
            max-width: 750px;
            color: #d0d8f0;
        }
        .hero .cta-badge {
            display: inline-block;
            background: #ffd700;
            color: #0a0e27;
            font-weight: 700;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.9em;
            margin-bottom: 18px;
            box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
        }
        .featured-img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            border-radius: 18px;
            border: 2px solid rgba(0, 200, 255, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
            margin: 28px 0;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .card {
            background: rgba(255, 255, 255, 0.04);
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 200, 255, 0.5);
            box-shadow: 0 10px 36px rgba(0, 200, 255, 0.12);
        }
        .card i {
            font-size: 2.2em;
            color: #00c8ff;
            margin-bottom: 12px;
        }
        .card h3 {
            color: #ffd700;
            margin: 8px 0;
        }
        .tip-box {
            background: rgba(0, 200, 255, 0.08);
            border-left: 4px solid #00c8ff;
            padding: 18px 20px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .warning-box {
            background: rgba(255, 165, 0, 0.08);
            border-left: 4px solid #ffa500;
            padding: 18px 20px;
            border-radius: 0 12px 12px 0;
        }
        .pros-cons {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 24px 0;
        }
        @media (max-width: 700px) {
            .pros-cons {
                grid-template-columns: 1fr;
            }
        }
        .pros,
        .cons {
            padding: 20px;
            border-radius: 16px;
        }
        .pros {
            background: rgba(0, 200, 80, 0.08);
            border: 1px solid rgba(0, 200, 80, 0.2);
        }
        .cons {
            background: rgba(255, 70, 70, 0.08);
            border: 1px solid rgba(255, 70, 70, 0.2);
        }
        .pros h3,
        .cons h3 {
            margin-top: 0;
        }
        .pros h3 {
            color: #4ade80;
        }
        .cons h3 {
            color: #ff6b6b;
        }
        .pros ul,
        .cons ul {
            padding-left: 1.4em;
            color: #c0c8e0;
            line-height: 1.8;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 12px;
            overflow: hidden;
            font-size: 0.95em;
        }
        th,
        td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        th {
            background: rgba(0, 200, 255, 0.12);
            color: #00c8ff;
            font-weight: 700;
        }
        tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }
        .form-section {
            background: rgba(255, 255, 255, 0.04);
            border-radius: 20px;
            padding: 28px;
            margin: 36px 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        @media (max-width: 680px) {
            .form-grid {
                grid-template-columns: 1fr;
            }
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(10, 14, 39, 0.6);
            color: #e0e6f0;
            font-size: 1em;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #00c8ff;
            box-shadow: 0 0 0 3px rgba(0, 200, 255, 0.15);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #00c8ff, #0099cc);
            color: #0a0e27;
            border: none;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1em;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 6px 20px rgba(0, 200, 255, 0.25);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 200, 255, 0.4);
            background: linear-gradient(135deg, #ffd700, #e6be00);
            color: #0a0e27;
        }
        .btn i {
            margin-right: 8px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.02);
            border-radius: 14px;
            padding: 20px 22px;
            margin: 16px 0;
            border-left: 3px solid #00c8ff;
        }
        .faq-item details {
            cursor: pointer;
        }
        .faq-item summary {
            font-weight: 700;
            color: #e0e6ff;
            font-size: 1.05em;
            outline: none;
        }
        .faq-item p {
            margin: 12px 0 0;
            color: #b8c0d8;
        }
        blockquote {
            border-left: 4px solid #ffd700;
            margin: 24px 0;
            padding: 14px 24px;
            background: rgba(255, 215, 0, 0.04);
            font-style: italic;
            border-radius: 0 12px 12px 0;
            color: #d0d8f0;
        }
        .social-share {
            display: flex;
            gap: 12px;
            margin: 28px 0;
            flex-wrap: wrap;
        }
        .share-btn {
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9em;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s;
        }
        .share-btn i {
            font-size: 1.1em;
        }
        .share-btn:hover {
            transform: scale(1.05);
        }
        .share-btn.twitter {
            background: #1da1f2;
            color: #fff;
        }
        .share-btn.facebook {
            background: #4267b2;
            color: #fff;
        }
        .share-btn.copy {
            background: #444;
            color: #fff;
        }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 12px;
            margin: 20px 0;
        }
        .related-links a {
            background: rgba(255, 255, 255, 0.04);
            padding: 12px 18px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            border: 1px solid transparent;
            transition: all 0.3s;
            font-size: 0.92em;
        }
        .related-links a:hover {
            border-color: #00c8ff;
            background: rgba(0, 200, 255, 0.06);
        }
        footer {
            background: #070a1a;
            border-top: 3px solid #00c8ff;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .footer-inner {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        @media (max-width: 800px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: #8890aa;
            font-size: 0.95em;
        }
        .footer-links a:hover {
            color: #00c8ff;
        }
        .copyr {
            text-align: center;
            color: #666;
            font-size: 0.88em;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6em;
            margin: 12px 0;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            color: #444;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label {
            color: #ffd700;
            transform: scale(1.1);
        }
        .rating-stars input:checked~label {
            color: #ffd700;
        }
        .lang-en {
            letter-spacing: 0.2px;
        }
        details {
            transition: all 0.3s;
        }
        .scroll-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: #00c8ff;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0e27;
            font-size: 1.3em;
            box-shadow: 0 6px 20px rgba(0, 200, 255, 0.4);
            z-index: 99;
            transition: all 0.3s;
        }
        .scroll-top:hover {
            transform: translateY(-4px);
            background: #ffd700;
        }
        @media (max-width: 480px) {
            body {
                font-size: 0.95em;
            }
            .hero {
                padding: 20px;
            }
            .form-section {
                padding: 18px;
            }
        }