*,
        *::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, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #0057a3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0b3b5e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            color: #0b2a3e;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 4px solid #ff7a00;
            display: inline-block;
            padding-bottom: 0.3rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #ff7a00;
            padding-left: 1rem;
            margin-top: 2.2rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1e3b4f;
        }
        h4 {
            font-size: 1.15rem;
            color: #2c4a61;
        }
        p {
            margin-bottom: 1.1rem;
        }
        ul,
        ol {
            margin-left: 1.6rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.3rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #fff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.06);
            border-radius: 16px;
            padding: 1.5rem 2rem;
        }
        header {
            padding: 1rem 0 0.5rem;
            border-bottom: 1px solid #e2e9f0;
            margin-bottom: 1.8rem;
        }
        .header-top {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 700;
            color: #0b2a3e;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0b2a3e, #2a5775);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff7a00;
            margin-right: 0.2rem;
        }
        .my-logo small {
            font-size: 0.8rem;
            font-weight: 400;
            color: #5a6f7e;
            -webkit-text-fill-color: #5a6f7e;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex-wrap: wrap;
        }
        nav a {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-weight: 500;
            color: #1e3b4f;
            background: transparent;
            transition: background 0.2s, color 0.2s;
            font-size: 0.9rem;
        }
        nav a:hover {
            background: #e8f0f8;
            color: #0057a3;
            text-decoration: none;
        }
        nav a i {
            margin-right: 0.4rem;
            color: #ff7a00;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: #0b2a3e;
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e8f0f8;
        }
        .nav-open {
            display: flex !important;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            color: #4a6375;
            margin-top: 0.4rem;
            border-top: 1px solid #edf2f7;
        }
        .breadcrumb a {
            color: #0057a3;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #6d8598;
        }
        .search-block {
            background: #f0f5fa;
            border-radius: 12px;
            padding: 1.8rem 2rem;
            margin: 2rem 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
            border: 1px solid #dce6ef;
        }
        .search-block label {
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #0b2a3e;
        }
        .search-block form {
            flex: 1;
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .search-block input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 1px solid #cbd8e4;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s, box-shadow 0.2s;
        }
        .search-block input[type="text"]:focus {
            border-color: #ff7a00;
            box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.2);
        }
        .search-block button {
            padding: 0.7rem 1.6rem;
            background: #ff7a00;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-block button:hover {
            background: #e06600;
            transform: scale(1.02);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        @media (max-width:700px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .score-box {
            background: #f7faff;
            border: 1px solid #dce6ef;
            border-radius: 14px;
            padding: 1.6rem 1.8rem;
        }
        .comment-box h3,
        .score-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.2rem;
        }
        .comment-box textarea,
        .score-box select,
        .score-box input[type="number"] {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #cbd8e4;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.2s;
            margin-top: 0.3rem;
        }
        .comment-box textarea:focus,
        .score-box select:focus,
        .score-box input[type="number"]:focus {
            border-color: #ff7a00;
            box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.15);
        }
        .comment-box textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-box button,
        .score-box button {
            margin-top: 0.8rem;
            padding: 0.6rem 1.8rem;
            background: #0b2a3e;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .comment-box button:hover,
        .score-box button:hover {
            background: #1e4b65;
            transform: scale(1.02);
        }
        .score-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #ffb800;
            margin: 0.4rem 0 0.6rem;
        }
        .feature-img {
            margin: 2rem 0;
            border-radius: 14px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        .feature-img figcaption {
            background: #f0f5fa;
            padding: 0.6rem 1.2rem;
            font-size: 0.85rem;
            color: #3a5a70;
            text-align: center;
            font-style: italic;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #0b2a3e;
            color: #fff;
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e2e9f0;
            background: #fafcfe;
        }
        .data-table tr:hover td {
            background: #f0f7ff;
        }
        footer {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e2e9f0;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: space-between;
        }
        .footer-inner section {
            flex: 1 1 200px;
        }
        .footer-inner h4 {
            margin-top: 0;
            font-size: 1.1rem;
            color: #0b2a3e;
        }
        friend-link {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
            padding: 0.8rem 0;
        }
        friend-link a {
            color: #0057a3;
            font-weight: 500;
            padding: 0.2rem 0;
        }
        friend-link a:hover {
            color: #ff7a00;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding: 1.5rem 0 0.8rem;
            font-size: 0.85rem;
            color: #4f6b7e;
            border-top: 1px solid #e2e9f0;
            margin-top: 1.5rem;
        }
        .copyright strong {
            color: #0b2a3e;
        }
        @media (max-width: 820px) {
            .container {
                padding: 1rem 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .hamburger {
                display: inline-block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: #f8fafc;
                padding: 1rem;
                border-radius: 12px;
                margin-top: 0.5rem;
                border: 1px solid #dce6ef;
            }
            nav a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .search-block {
                flex-direction: column;
                padding: 1.2rem;
            }
            .search-block form {
                width: 100%;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0.8rem 0.8rem;
            }
            h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .badge {
            display: inline-block;
            background: #ff7a00;
            color: #fff;
            padding: 0.15rem 0.8rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .updated {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #4f6b7e;
            font-size: 0.9rem;
            margin: 1rem 0 0.2rem;
        }
        .updated i {
            color: #ff7a00;
        }
        .highlight-box {
            background: #fef8f0;
            border-left: 5px solid #ff7a00;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem;
            margin: 1.2rem 0;
        }
        @media (max-width:600px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #f8fafc;
            border: 1px solid #e2e9f0;
            border-radius: 12px;
            padding: 1.2rem 1.4rem;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
        }
        .card i {
            color: #ff7a00;
            font-size: 1.4rem;
            margin-bottom: 0.4rem;
        }
        .toc {
            background: #f0f5fa;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
            border: 1px solid #dce6ef;
        }
        .toc ol {
            margin-bottom: 0;
        }
        .toc a {
            color: #0057a3;
        }
        blockquote {
            border-left: 4px solid #ff7a00;
            padding: 0.6rem 1.2rem;
            margin: 1.2rem 0;
            background: #faf6f0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #2a4a60;
        }