*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f5f7fa;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0f3b8a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0f172a;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #1d4ed8;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0 0 1rem 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;
            padding: 0.8rem 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #facc15;
            text-shadow: 0 2px 8px rgba(250, 204, 21, 0.3);
            transition: opacity 0.3s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
            color: #facc15;
        }
        .my-logo i {
            margin-right: 8px;
            color: #38bdf8;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        nav a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        nav a i {
            margin-right: 6px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 8px;
            transition: background 0.3s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            padding: 0.6rem 20px 0.2rem 20px;
            max-width: 1200px;
            margin: 0 auto;
            font-size: 0.85rem;
            color: #94a3b8;
        }
        .breadcrumb a {
            color: #94a3b8;
        }
        .breadcrumb a:hover {
            color: #facc15;
        }
        .breadcrumb span {
            color: #facc15;
        }
        main {
            padding: 2rem 0 3rem 0;
        }
        .hero {
            background: linear-gradient(145deg, #1e293b, #0f172a);
            border-radius: 24px;
            padding: 2.8rem 2.5rem;
            margin-bottom: 2.8rem;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
        }
        .hero-text {
            flex: 1 1 300px;
        }
        .hero-text h1 {
            color: #facc15;
            font-size: 2.6rem;
            margin-top: 0;
        }
        .hero-text p {
            font-size: 1.1rem;
            color: #cbd5e1;
        }
        .hero-text .badge {
            display: inline-block;
            background: #1d4ed8;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin-top: 0.5rem;
        }
        .hero-img {
            flex: 0 0 280px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
        }
        .hero-img img {
            width: 100%;
            height: auto;
            display: block;
        }
        .search-section {
            background: #fff;
            border-radius: 20px;
            padding: 2rem;
            margin-bottom: 2.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }
        .search-section form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
        }
        .search-section input[type="text"] {
            flex: 1 1 250px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-section input[type="text"]:focus {
            border-color: #1d4ed8;
        }
        .search-section button {
            background: #1d4ed8;
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        .search-section button:hover {
            background: #0f3b8a;
            transform: scale(1.02);
        }
        .search-section button i {
            margin-right: 8px;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 900px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .content-main {
            background: #fff;
            border-radius: 20px;
            padding: 2.2rem 2.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .content-main .update-badge {
            display: inline-block;
            background: #dcfce7;
            color: #166534;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.6rem;
            margin-bottom: 1rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card ul li a {
            font-weight: 500;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.2rem;
            margin: 1.8rem 0;
        }
        .feature-item {
            background: #f8fafc;
            padding: 1.2rem 1rem;
            border-radius: 16px;
            text-align: center;
            border: 1px solid #e2e8f0;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
        }
        .feature-item i {
            font-size: 2rem;
            color: #1d4ed8;
            margin-bottom: 0.5rem;
        }
        .feature-item h4 {
            margin: 0.4rem 0 0.2rem 0;
        }
        .feature-item p {
            font-size: 0.9rem;
            color: #475569;
            margin-bottom: 0;
        }
        .code-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .code-table th {
            background: #1e293b;
            color: #facc15;
            padding: 0.8rem 1rem;
            text-align: left;
        }
        .code-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .code-table tr:hover td {
            background: #f1f5f9;
        }
        .code-table .code {
            font-family: 'Courier New', monospace;
            background: #f1f5f9;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            font-weight: 600;
            color: #1d4ed8;
        }
        .interact-section {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.5rem;
            margin-top: 2.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 700px) {
            .interact-grid {
                grid-template-columns: 1fr;
            }
        }
        .interact-card {
            background: #f8fafc;
            padding: 1.5rem;
            border-radius: 16px;
            border: 1px solid #e2e8f0;
        }
        .interact-card h3 {
            margin-top: 0;
        }
        .interact-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .interact-card input,
        .interact-card textarea,
        .interact-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            font-family: inherit;
            transition: border 0.3s;
        }
        .interact-card input:focus,
        .interact-card textarea:focus,
        .interact-card select:focus {
            border-color: #1d4ed8;
        }
        .interact-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .interact-card button {
            background: #1d4ed8;
            color: #fff;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            align-self: flex-start;
        }
        .interact-card button:hover {
            background: #0f3b8a;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            color: #facc15;
            cursor: pointer;
        }
        .star-rating i {
            transition: transform 0.2s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2.5rem 20px 1.5rem;
            margin-top: 3rem;
        }
        footer .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 700px) {
            footer .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        footer h4 {
            color: #facc15;
            margin-top: 0;
        }
        footer a {
            color: #94a3b8;
        }
        footer a:hover {
            color: #facc15;
        }
        footer .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #1e293b;
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #64748b;
        }
        friend-link {
            display: block;
            margin-top: 0.5rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.5rem;
            margin-bottom: 0.3rem;
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 0.6rem 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 1rem 0 0.5rem 0;
                gap: 0.3rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.6rem 1rem;
                border-radius: 12px;
            }
            .hero {
                padding: 1.8rem 1.5rem;
                flex-direction: column;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .hero-img {
                flex: 0 0 100%;
                max-width: 280px;
            }
            .content-main {
                padding: 1.5rem 1.2rem;
            }
            .content-main h1 {
                font-size: 1.8rem;
            }
            .content-main h2 {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 0.4rem 16px 0.2rem 16px;
            }
            .interact-section {
                padding: 1.5rem 1.2rem;
            }
            .code-table {
                font-size: 0.8rem;
            }
            .code-table th,
            .code-table td {
                padding: 0.5rem 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .hero-text h1 {
                font-size: 1.6rem;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #1d4ed8;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: background 0.3s, transform 0.3s;
            z-index: 999;
            border: none;
        }
        .scroll-top:hover {
            background: #0f3b8a;
            transform: translateY(-4px);
        }
        .highlight-box {
            background: #fef9c3;
            border-left: 5px solid #facc15;
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .highlight-box p {
            margin-bottom: 0.3rem;
        }
        .tip-box {
            background: #e0f2fe;
            border-left: 5px solid #38bdf8;
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .emoji-big {
            font-size: 1.4rem;
        }
        .inline-icon {
            margin-right: 6px;
        }
        .last-updated {
            color: #64748b;
            font-size: 0.9rem;
        }
        .table-wrap {
            overflow-x: auto;
        }