*,
        *::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, Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.7;
            color: #1e293b;
            background: #f8fafc;
            padding: 0 1rem;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s, border-color 0.2s;
        }
        a:hover,
        a:focus-visible {
            color: #1d4ed8;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: #0f172a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #2563eb20;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.1rem;
            color: #334155;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            color: #334155;
        }
        strong {
            color: #0f172a;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 24px 24px 0 0;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.04);
            padding: 1.5rem 2rem 2rem;
            min-height: 100vh;
        }
        @media (max-width: 768px) {
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 16px 16px 0 0;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            h4 {
                font-size: 0.98rem;
            }
            body {
                padding: 0 0.5rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0 1rem;
            border-bottom: 1px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #0f172a;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity 0.25s;
        }
        .my-logo:hover {
            opacity: 0.8;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #2563eb;
            margin-right: 0.3rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            padding: 0.3rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s, color 0.2s;
        }
        .main-nav a:hover,
        .main-nav a:focus-visible {
            background: #2563eb0c;
            color: #2563eb;
            text-decoration: none;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #0f172a;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger-btn:hover {
            background: #f1f5f9;
        }
        @media (max-width: 768px) {
            .hamburger-btn {
                display: inline-block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 0.75rem 0 0.25rem;
                gap: 0.5rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                font-size: 1rem;
                padding: 0.4rem 0.8rem;
                width: 100%;
                border-radius: 6px;
            }
            .main-nav a:hover {
                background: #f1f5f9;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            font-size: 0.85rem;
            color: #64748b;
            padding: 0.6rem 0 0.2rem;
            gap: 0.3rem 0.6rem;
            border-bottom: 1px solid #f1f5f9;
            margin-bottom: 1.8rem;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: #94a3b8;
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 500;
        }
        .hero-img-wrap {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .hero-img-wrap img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        section {
            margin-bottom: 2.8rem;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin: 1.5rem 0 2rem;
            padding: 1.2rem 1.4rem;
            background: #f1f5f9;
            border-radius: 14px;
            align-items: center;
        }
        .search-form label {
            font-weight: 600;
            font-size: 0.95rem;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.6rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 0.95rem;
            background: #fff;
            transition: border 0.2s, box-shadow 0.2s;
        }
        .search-form input[type="text"]:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px #2563eb20;
        }
        .search-form button {
            padding: 0.6rem 1.4rem;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 8px;
            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-form button:hover {
            background: #1d4ed8;
        }
        .search-form button:active {
            transform: scale(0.97);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2rem 0 2.8rem;
        }
        @media (max-width: 680px) {
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 1.4rem;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 14px;
            padding: 1.4rem 1.6rem 1.8rem;
            border: 1px solid #e2e8f0;
            transition: box-shadow 0.2s;
        }
        .feedback-card:hover {
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #0f172a;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.6rem 0.9rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 0.92rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s, box-shadow 0.2s;
            resize: vertical;
        }
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px #2563eb18;
        }
        .feedback-card textarea {
            min-height: 80px;
        }
        .feedback-card button {
            align-self: flex-start;
            padding: 0.55rem 1.6rem;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .feedback-card button:hover {
            background: #1d4ed8;
        }
        .feedback-card button:active {
            transform: scale(0.97);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.4rem;
            color: #fbbf24;
            margin: 0.2rem 0 0.4rem;
        }
        .rating-stars i {
            cursor: pointer;
            transition: transform 0.15s, color 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
            color: #f59e0b;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #64748b;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 0 0.2rem;
            border-top: 1px solid #f1f5f9;
            margin-top: 1.2rem;
        }
        .site-footer {
            border-top: 1px solid #e2e8f0;
            padding: 2rem 0 1.2rem;
            margin-top: 2.5rem;
        }
        .site-footer friend-link {
            display: block;
            font-weight: 600;
            font-size: 1rem;
            color: #0f172a;
            margin-bottom: 0.8rem;
            padding: 0.6rem 0.8rem;
            background: #f1f5f9;
            border-radius: 10px;
        }
        .site-footer friend-link a {
            font-weight: 500;
            margin: 0 0.75rem 0 0.3rem;
        }
        .site-footer friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            font-size: 0.82rem;
            color: #64748b;
            text-align: center;
            padding-top: 1rem;
            border-top: 1px solid #e2e8f0;
            margin-top: 1rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.2rem 1rem;
        }
        .copyright span {
            white-space: nowrap;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0 1.8rem;
            font-size: 0.92rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.03);
        }
        .data-table th {
            background: #1e293b;
            color: #fff;
            font-weight: 600;
            padding: 0.7rem 1rem;
            text-align: left;
        }
        .data-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #e2e8f0;
            background: #fff;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f8fafc;
        }
        @media (max-width: 600px) {
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.4rem 0.6rem;
            }
        }
        blockquote {
            border-left: 4px solid #2563eb;
            padding: 0.8rem 1.2rem;
            margin: 1.2rem 0;
            background: #f1f5f9;
            border-radius: 0 10px 10px 0;
            font-style: italic;
            color: #1e293b;
        }
        blockquote cite {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.85rem;
            color: #64748b;
            font-style: normal;
        }
        .highlight-box {
            background: linear-gradient(135deg, #eef2ff, #f0eaff);
            border-radius: 14px;
            padding: 1.2rem 1.6rem;
            margin: 1.4rem 0;
            border: 1px solid #2563eb20;
        }
        .emoji-md {
            font-size: 1.2em;
            margin-right: 0.2rem;
        }
        .inline-icon {
            margin-right: 0.3rem;
            color: #2563eb;
        }
        .flex-cols {
            display: flex;
            gap: 1.8rem;
            flex-wrap: wrap;
        }
        .flex-cols>div {
            flex: 1 1 240px;
        }
        .btn-sm {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            background: #2563eb0c;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            color: #2563eb;
            transition: background 0.2s;
        }
        .btn-sm:hover {
            background: #2563eb18;
            text-decoration: none;
        }
        @media (max-width: 480px) {
            .search-form {
                flex-direction: column;
                align-items: stretch;
            }
            .search-form input[type="text"] {
                min-width: unset;
            }
            .search-form button {
                align-self: center;
            }
        }