*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #8b5cf6;
            --primary-dark: #7c3aed;
            --secondary: #ec4899;
            --accent: #f59e0b;
            --bg-light: #fdf2f8;
            --bg-white: #ffffff;
            --text-dark: #1e1b4b;
            --text-mid: #4b5563;
            --text-light: #9ca3af;
            --radius: 16px;
            --shadow: 0 8px 32px rgba(139, 92, 246, 0.15);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            text-shadow: 0 2px 12px rgba(236, 72, 153, 0.5);
            letter-spacing: -0.5px;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #fdf2f8;
        }
        .my-logo i {
            color: var(--accent);
            margin-right: 6px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list li a {
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list li a:hover,
        .nav-list li a.active {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .nav-list li a i {
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: var(--bg-white);
            padding: 12px 0;
            border-bottom: 1px solid rgba(139, 92, 246, 0.1);
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            font-size: 0.85rem;
        }
        .breadcrumb ul li {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-mid);
        }
        .breadcrumb ul li+li::before {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--text-light);
            margin-right: 6px;
        }
        .breadcrumb ul li:last-child {
            color: var(--primary);
            font-weight: 600;
        }
        .breadcrumb ul li a {
            color: var(--text-mid);
        }
        .breadcrumb ul li a:hover {
            color: var(--primary);
        }
        .main-content {
            padding: 40px 0 60px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, #7c3aed, #ec4899);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1e1b4b;
            margin-top: 48px;
            margin-bottom: 16px;
            border-bottom: 3px solid var(--primary);
            padding-bottom: 8px;
            display: inline-block;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #312e81;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #4c1d95;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 16px;
            color: var(--text-mid);
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-dark);
            font-weight: 500;
            line-height: 1.8;
        }
        .highlight-box {
            background: linear-gradient(135deg, #ede9fe, #fdf2f8);
            border-left: 5px solid var(--primary);
            padding: 24px 28px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #7c3aed;
        }
        .hero {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 48px;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
        }
        .hero-text .meta {
            font-size: 0.9rem;
            color: var(--text-light);
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .hero-text .meta span i {
            margin-right: 6px;
            color: var(--primary);
        }
        .hero-img {
            border-radius: var(--radius);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }
        .codes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }
        .code-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: 0 4px 16px rgba(139, 92, 246, 0.08);
            border: 1px solid rgba(139, 92, 246, 0.08);
            transition: transform 0.25s, box-shadow 0.25s;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .code-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(139, 92, 246, 0.18);
        }
        .code-card .code-value {
            font-family: 'Courier New', monospace;
            font-size: 1.3rem;
            font-weight: 700;
            background: #f5f3ff;
            padding: 6px 14px;
            border-radius: 8px;
            color: #7c3aed;
            letter-spacing: 1px;
            display: inline-block;
            align-self: flex-start;
        }
        .code-card .badge {
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 40px;
            font-weight: 600;
            display: inline-block;
            align-self: flex-start;
        }
        .badge.active {
            background: #d1fae5;
            color: #065f46;
        }
        .badge.expired {
            background: #fee2e2;
            color: #991b1b;
        }
        .badge.new {
            background: #dbeafe;
            color: #1e40af;
        }
        .code-card .reward {
            font-size: 0.95rem;
            color: var(--text-mid);
        }
        .code-card .reward i {
            color: var(--accent);
            margin-right: 6px;
        }
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }
        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(139, 92, 246, 0.06);
            transition: transform 0.2s;
        }
        .step-item:hover {
            transform: translateY(-3px);
        }
        .step-item .step-num {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 12px;
        }
        .step-item h4 {
            margin-top: 0;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .interview-block {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            margin: 32px 0;
            border-left: 6px solid var(--secondary);
        }
        .interview-block .quote {
            font-style: italic;
            font-size: 1.1rem;
            color: #1e1b4b;
            padding-left: 20px;
            border-left: 3px solid var(--secondary);
            margin: 16px 0;
        }
        .interview-block .attribution {
            font-weight: 600;
            color: var(--primary);
            margin-top: 8px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 20px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(139, 92, 246, 0.06);
        }
        .stat-card .stat-value {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #7c3aed, #ec4899);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-mid);
            margin-top: 4px;
        }
        .search-section {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
            margin: 40px 0;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #e5e7eb;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: var(--primary);
        }
        .search-form button {
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 24px rgba(139, 92, 246, 0.35);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 40px 0;
        }
        .comment-section,
        .rating-section {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
        }
        .comment-section h3,
        .rating-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-section textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 1rem;
            font-family: var(--font);
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border-color 0.2s;
            margin: 12px 0;
        }
        .comment-section textarea:focus {
            border-color: var(--primary);
        }
        .comment-section input[type="text"] {
            width: 100%;
            padding: 12px 18px;
            border: 2px solid #e5e7eb;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
            margin-bottom: 12px;
        }
        .comment-section input[type="text"]:focus {
            border-color: var(--primary);
        }
        .comment-section button,
        .rating-section button {
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .comment-section button:hover,
        .rating-section button:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 24px rgba(139, 92, 246, 0.35);
        }
        .star-rating {
            display: flex;
            gap: 8px;
            font-size: 2rem;
            margin: 12px 0;
            cursor: pointer;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d1d5db;
            transition: color 0.2s, transform 0.2s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        .star-rating label:hover {
            transform: scale(1.15);
        }
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 20px 0;
        }
        .related-links a {
            background: var(--bg-white);
            padding: 8px 18px;
            border-radius: 40px;
            border: 1px solid rgba(139, 92, 246, 0.15);
            font-size: 0.9rem;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-links a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .site-footer {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
            color: rgba(255, 255, 255, 0.85);
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
            margin-bottom: 24px;
        }
        .footer-inner h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-inner p,
        .footer-inner a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        .footer-inner a:hover {
            color: #fff;
        }
        .friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            margin-top: 8px;
        }
        .friend-link li a {
            background: rgba(255, 255, 255, 0.08);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.2s;
        }
        .friend-link li a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 4px;
                padding: 12px 0 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 12px 16px;
                border-radius: 12px;
                width: 100%;
            }
            .hero {
                grid-template-columns: 1fr;
                padding: 20px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .codes-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .header-inner {
                padding: 4px 0;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .hero {
                padding: 16px;
            }
            .stat-card .stat-value {
                font-size: 1.5rem;
            }
            .star-rating {
                font-size: 1.6rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .author-bio {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            margin: 28px 0;
        }
        .author-bio .avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .author-bio .info strong {
            display: block;
            font-size: 1.05rem;
        }
        .author-bio .info span {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #f5f3ff;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 500;
        }
        .last-updated i {
            color: var(--secondary);
        }
        .nav-list {
            transition: all 0.3s ease;
        }