* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.8;
            padding: 0 20px;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0f3b9e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: #0f172a;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4em;
            border-bottom: 4px solid #1d4ed8;
            padding-bottom: 0.3em;
            display: inline-block;
        }
        h2 {
            font-size: 1.9rem;
            border-left: 5px solid #1d4ed8;
            padding-left: 18px;
            margin-top: 2em;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 1.6em;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.2em;
            color: #334155;
        }
        p {
            margin-bottom: 1.2em;
            font-size: 1.05rem;
            color: #1e293b;
        }
        ul,
        ol {
            margin: 0.8em 0 1.4em 2em;
        }
        li {
            margin-bottom: 0.4em;
            font-size: 1.02rem;
        }
        strong {
            color: #0f172a;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #1e40af;
        }
        blockquote {
            border-left: 6px solid #1d4ed8;
            background: #eef2ff;
            padding: 1.2em 1.8em;
            margin: 1.6em 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #1e293b;
        }
        hr {
            border: 0;
            border-top: 2px dashed #cbd5e1;
            margin: 2.4em 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            padding: 20px 30px 40px;
            border-radius: 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 12px 16px 30px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
                padding-left: 12px;
            }
            h3 {
                font-size: 1.2rem;
            }
            h4 {
                font-size: 1.05rem;
            }
            p,
            li {
                font-size: 0.98rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0 14px;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #1d4ed8, #0f3b9e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .my-logo i {
            background: #1d4ed8;
            color: #fff;
            padding: 8px 12px;
            border-radius: 12px;
            font-size: 1.4rem;
            -webkit-text-fill-color: white;
            background-clip: unset;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .my-logo span {
            font-size: 0.85rem;
            font-weight: 400;
            color: #64748b;
            -webkit-text-fill-color: #64748b;
            letter-spacing: 0.3px;
            margin-left: 4px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-weight: 600;
            color: #1e293b;
            padding: 6px 12px;
            border-radius: 8px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            background: #1d4ed8;
            color: #fff;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e293b;
            cursor: pointer;
            padding: 4px 8px;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #f1f5f9;
                padding: 16px 12px;
                border-radius: 16px;
                margin-top: 12px;
                gap: 6px;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo span {
                display: none;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 10px;
            padding: 12px 0 6px;
            font-size: 0.9rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #1d4ed8;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span.sep {
            color: #94a3b8;
        }
        .search-box {
            display: flex;
            max-width: 500px;
            margin: 18px 0 28px;
            border-radius: 60px;
            overflow: hidden;
            border: 2px solid #e2e8f0;
            background: #fff;
            transition: border-color 0.2s;
        }
        .search-box:focus-within {
            border-color: #1d4ed8;
        }
        .search-box input {
            flex: 1;
            padding: 14px 20px;
            border: none;
            outline: none;
            font-size: 1rem;
            background: transparent;
            color: #1e293b;
        }
        .search-box button {
            padding: 14px 24px;
            background: #1d4ed8;
            color: #fff;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: #0f3b9e;
        }
        .featured-image {
            margin: 24px 0 32px;
            border-radius: 16px;
            overflow: hidden;
            background: #f1f5f9;
        }
        .featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 10px 16px;
            font-size: 0.9rem;
            color: #475569;
            background: #f1f5f9;
            border-radius: 0 0 16px 16px;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8em 0;
            font-size: 0.98rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #1d4ed8;
            color: #fff;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 12px 16px;
            border-bottom: 1px solid #e2e8f0;
            background: #fff;
        }
        .data-table tr:hover td {
            background: #f1f5f9;
        }
        @media (max-width: 600px) {
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 8px 10px;
            }
        }
        .rating-area {
            background: #f8fafc;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 32px 0;
            border: 1px solid #e2e8f0;
        }
        .rating-area h3 {
            margin-top: 0;
        }
        .star-group {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #facc15;
            margin: 10px 0 14px;
            flex-wrap: wrap;
        }
        .star-group i {
            cursor: pointer;
            transition: transform 0.15s;
        }
        .star-group i:hover {
            transform: scale(1.2);
        }
        .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            margin-top: 10px;
        }
        .rating-form input[type="number"] {
            width: 80px;
            padding: 10px 12px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            outline: none;
        }
        .rating-form input[type="number"]:focus {
            border-color: #1d4ed8;
        }
        .rating-form button {
            padding: 10px 28px;
            background: #1d4ed8;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .rating-form button:hover {
            background: #0f3b9e;
        }
        .comment-area {
            background: #f8fafc;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 28px 0;
            border: 1px solid #e2e8f0;
        }
        .comment-area h3 {
            margin-top: 0;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 12px;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            outline: none;
            font-family: inherit;
            width: 100%;
        }
        .comment-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-form input:focus,
        .comment-form textarea:focus {
            border-color: #1d4ed8;
        }
        .comment-form button {
            align-self: flex-start;
            padding: 12px 36px;
            background: #1d4ed8;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .comment-form button:hover {
            background: #0f3b9e;
        }
        .site-footer {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 2px solid #e2e8f0;
        }
        .site-footer friend-link {
            display: block;
            padding: 16px 0 8px;
            font-size: 0.95rem;
            color: #1e293b;
        }
        .site-footer friend-link a {
            color: #1d4ed8;
            margin: 0 6px;
        }
        .site-footer friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            padding: 16px 0 10px;
            font-size: 0.9rem;
            color: #64748b;
            text-align: center;
            border-top: 1px solid #e2e8f0;
            margin-top: 16px;
        }
        .copyright strong {
            color: #1e293b;
        }
        .highlight-box {
            background: #eef2ff;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 1.6em 0;
            border: 1px solid #c7d2fe;
        }
        .highlight-box strong {
            color: #1d4ed8;
        }
        .tip-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin: 1.8em 0;
        }
        .tip-card {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 20px 18px;
            transition: box-shadow 0.25s, transform 0.2s;
        }
        .tip-card:hover {
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
            transform: translateY(-3px);
        }
        .tip-card i {
            font-size: 2rem;
            color: #1d4ed8;
            margin-bottom: 10px;
        }
        .tip-card h4 {
            margin-top: 0.2em;
            margin-bottom: 0.4em;
        }
        .tip-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            background: #1d4ed8;
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(29, 78, 216, 0.3);
            transition: background 0.2s, transform 0.2s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .back-to-top:hover {
            background: #0f3b9e;
            transform: scale(1.06);
        }
        @media (max-width: 600px) {
            .back-to-top {
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
                bottom: 16px;
                right: 16px;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #94a3b8;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #64748b;
        }
        .eaat-author {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0 6px;
            font-size: 0.95rem;
            color: #475569;
            border-bottom: 1px solid #e2e8f0;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .eaat-author i {
            color: #1d4ed8;
        }
        .eaat-author .date {
            margin-left: auto;
            font-weight: 500;
        }
        @media (max-width: 500px) {
            .eaat-author .date {
                margin-left: 0;
                width: 100%;
            }
        }