*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #0f3b8e;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.25;
            color: #0f172a;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 3px solid #2563eb;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        h3 {
            font-size: 1.3rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            color: #334155;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
            flex: 1;
        }
        header {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0.8rem 0;
            border-radius: 0 0 1.2rem 1.2rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            margin-bottom: 1.5rem;
            position: relative;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0 1.2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            background: #fbbf24;
            color: #0f172a;
            -webkit-text-fill-color: #0f172a;
            padding: 0.3rem;
            border-radius: 50%;
            font-size: 1.2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            display: none;
            padding: 0.2rem 0.5rem;
            border-radius: 0.4rem;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        nav a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        nav a:hover,
        nav a:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fbbf24;
            text-decoration: none;
        }
        nav a.active {
            background: #2563eb;
            color: #fff;
        }
        .breadcrumb {
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #94a3b8;
            max-width: 1200px;
            margin: 0 auto 0.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            list-style: none;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.4rem 0 0.2rem;
            color: #64748b;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #93c5fd;
        }
        .breadcrumb a:hover {
            color: #fbbf24;
        }
        .breadcrumb .current {
            color: #e2e8f0;
            font-weight: 600;
        }
        .search-wrap {
            background: #fff;
            border-radius: 2rem;
            display: flex;
            align-items: center;
            padding: 0.2rem 0.2rem 0.2rem 1.2rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            max-width: 500px;
            margin: 1.2rem 0 0.8rem;
            border: 1px solid #e2e8f0;
        }
        .search-wrap input {
            border: none;
            outline: none;
            flex: 1;
            padding: 0.6rem 0;
            font-size: 1rem;
            background: transparent;
            min-width: 0;
        }
        .search-wrap button {
            background: #2563eb;
            border: none;
            color: #fff;
            padding: 0.6rem 1.4rem;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            font-size: 0.95rem;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-wrap button:hover {
            background: #1d4ed8;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            margin: 1.5rem 0 2rem;
        }
        .main-content {
            background: #fff;
            border-radius: 1.2rem;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            border-radius: 1.2rem;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            align-self: start;
            position: sticky;
            top: 1rem;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            margin-bottom: 1rem;
            color: #0f172a;
            border-left: 4px solid #2563eb;
            padding-left: 0.8rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .sidebar a {
            font-weight: 500;
        }
        .feature-image {
            border-radius: 1rem;
            overflow: hidden;
            margin: 1.8rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .feature-image figcaption {
            background: #f1f5f9;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #475569;
            font-style: italic;
        }
        .rating-box {
            background: #f8fafc;
            border-radius: 1rem;
            padding: 1.5rem 1.8rem;
            margin: 2rem 0 1.5rem;
            border: 1px solid #e2e8f0;
        }
        .rating-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .stars {
            display: flex;
            gap: 0.3rem;
            font-size: 2rem;
            cursor: pointer;
            color: #cbd5e1;
            transition: color 0.15s;
            margin: 0.6rem 0 0.8rem;
        }
        .stars .star.active {
            color: #f59e0b;
        }
        .stars .star:hover {
            color: #fbbf24;
        }
        .comment-box {
            background: #f8fafc;
            border-radius: 1rem;
            padding: 1.5rem 1.8rem;
            margin: 1.5rem 0;
            border: 1px solid #e2e8f0;
        }
        .comment-box textarea {
            width: 100%;
            min-height: 100px;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 0.8rem;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            transition: border 0.2s;
        }
        .comment-box textarea:focus {
            outline: none;
            border-color: #2563eb;
        }
        .comment-box input[type="text"] {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 0.8rem;
            font-size: 1rem;
            margin-bottom: 0.8rem;
        }
        .comment-box input:focus {
            outline: none;
            border-color: #2563eb;
        }
        .btn {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #1d4ed8;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1e293b;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .feedback-msg {
            margin-top: 0.8rem;
            font-weight: 500;
            color: #16a34a;
            display: none;
        }
        .feedback-msg.error {
            color: #dc2626;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #64748b;
            background: #f1f5f9;
            padding: 0.4rem 1rem;
            border-radius: 2rem;
            display: inline-block;
            margin: 1rem 0 0.2rem;
        }
        footer {
            background: #0f172a;
            color: #cbd5e1;
            border-radius: 1.2rem 1.2rem 0 0;
            padding: 2rem 1.5rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem 1.4rem;
            border-radius: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        friend-link a {
            color: #93c5fd;
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
        }
        friend-link a:hover {
            color: #fbbf24;
        }
        .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .copyright strong {
            color: #e2e8f0;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.6rem;
            }
            .header-inner {
                padding: 0 0.8rem;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 1rem 0 0.5rem;
                gap: 0.3rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.6rem 1rem;
                border-radius: 0.6rem;
            }
            .main-content {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .search-wrap {
                max-width: 100%;
                flex-wrap: wrap;
                border-radius: 1.5rem;
                padding: 0.3rem 0.3rem 0.3rem 1rem;
            }
            .search-wrap input {
                font-size: 0.95rem;
                padding: 0.5rem 0;
            }
            .search-wrap button {
                padding: 0.5rem 1rem;
                font-size: 0.85rem;
            }
            .rating-box,
            .comment-box {
                padding: 1rem;
            }
            .stars {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 0.4rem 0.8rem;
            }
            .feature-image {
                margin: 1rem 0;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                flex-wrap: nowrap;
            }
            .my-logo {
                font-size: 1.2rem;
                max-width: 70%;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
            }
            .my-logo i {
                font-size: 0.9rem;
                padding: 0.2rem;
            }
            .nav-toggle {
                font-size: 1.5rem;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.2rem;
            }
            p {
                font-size: 0.98rem;
            }
            .btn {
                padding: 0.5rem 1.2rem;
                font-size: 0.9rem;
            }
        }
        @media print {
            .nav-toggle,
            .search-wrap,
            .rating-box,
            .comment-box,
            .sidebar {
                display: none !important;
            }
            .content-grid {
                display: block;
            }
            header {
                background: #fff !important;
                color: #000 !important;
                box-shadow: none;
            }
            .my-logo {
                -webkit-text-fill-color: #0f172a !important;
                color: #0f172a !important;
            }
            .breadcrumb a {
                color: #1d4ed8 !important;
            }
            .breadcrumb .current {
                color: #000 !important;
            }
        }