*,
        *::before,
        *::after {
            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: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6b00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 20px 24px 40px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: #0f1a2f;
        }
        h1 {
            font-size: 2.2rem;
            margin: 0.6rem 0 1.2rem;
            border-left: 6px solid #ff6b00;
            padding-left: 20px;
        }
        h2 {
            font-size: 1.7rem;
            margin: 2.2rem 0 1rem;
            border-bottom: 2px solid #e8edf4;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.3rem;
            margin: 1.8rem 0 0.7rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.5rem;
            color: #2a4b7a;
        }
        p {
            margin-bottom: 1.1rem;
            color: #2c3e50;
        }
        .banner-img {
            margin: 1.6rem 0 2rem;
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .badge {
            display: inline-block;
            background: #ff6b00;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #5a6f8a;
            background: #f0f4fa;
            display: inline-block;
            padding: 4px 16px;
            border-radius: 30px;
            margin: 0 0 1.2rem;
        }
        .last-updated i {
            margin-right: 6px;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 10px;
            border-bottom: 1px solid #e4eaf2;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0f1a2f 40%, #ff6b00 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff6b00;
            margin-right: 4px;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #0f1a2f;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef3f9;
        }
        nav#main-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            align-items: center;
        }
        nav#main-nav a {
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            color: #1e3a5f;
            position: relative;
        }
        nav#main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #ff6b00;
            transition: width 0.25s;
        }
        nav#main-nav a:hover::after {
            width: 100%;
        }
        nav#main-nav a:hover {
            text-decoration: none;
            color: #ff6b00;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 16px 0 6px;
            font-size: 0.85rem;
            color: #5a6f8a;
        }
        .breadcrumb li+li::before {
            content: '›';
            margin: 0 10px;
            color: #b0c4dd;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #2a4b7a;
        }
        .breadcrumb a:hover {
            color: #ff6b00;
        }
        .breadcrumb .current {
            color: #8899b0;
        }
        .search-box {
            display: flex;
            max-width: 480px;
            margin: 1.8rem 0 0.8rem;
            border-radius: 60px;
            overflow: hidden;
            border: 1px solid #dce3ed;
            background: #fafcff;
            transition: box-shadow 0.25s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.2);
            border-color: #ff6b00;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 14px 20px;
            font-size: 1rem;
            background: transparent;
            outline: none;
            color: #1e2a3a;
        }
        .search-box input::placeholder {
            color: #8a9fb5;
            font-style: italic;
        }
        .search-box button {
            background: #ff6b00;
            border: none;
            color: #fff;
            padding: 0 24px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-box button:hover {
            background: #e05d00;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 20px;
        }
        .sidebar {
            border-left: 1px solid #e4eaf2;
            padding-left: 28px;
        }
        .sidebar .card {
            background: #f7faff;
            border-radius: 16px;
            padding: 20px;
            margin-bottom: 28px;
            border: 1px solid #e4eaf2;
        }
        .sidebar .card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 1px solid #dce3ed;
            padding-bottom: 8px;
        }
        .sidebar .card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar .card li {
            padding: 6px 0;
            border-bottom: 1px solid #eef3f9;
        }
        .sidebar .card li a {
            font-weight: 500;
        }
        .comment-section,
        .rating-section {
            background: #f7faff;
            border-radius: 20px;
            padding: 28px 32px;
            margin: 2.8rem 0 1.2rem;
            border: 1px solid #e4eaf2;
        }
        .comment-section h3,
        .rating-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-section form,
        .rating-section form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 16px;
        }
        .comment-section input,
        .comment-section textarea,
        .rating-section select {
            padding: 12px 16px;
            border: 1px solid #dce3ed;
            border-radius: 12px;
            font-size: 0.95rem;
            background: #fff;
            transition: border 0.2s;
            font-family: inherit;
        }
        .comment-section input:focus,
        .comment-section textarea:focus,
        .rating-section select:focus {
            border-color: #ff6b00;
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.08);
        }
        .comment-section textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #0f1a2f;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .btn:hover {
            background: #ff6b00;
            transform: scale(1.02);
        }
        .btn i {
            margin-right: 8px;
        }
        .stars {
            color: #ffaa00;
            font-size: 1.4rem;
            letter-spacing: 4px;
        }
        friend-link {
            display: block;
            padding: 24px 0 16px;
            border-top: 1px solid #e4eaf2;
            margin-top: 32px;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 18px 4px 0;
            color: #2a4b7a;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #ff6b00;
        }
        .copyright {
            text-align: center;
            padding: 20px 0 8px;
            font-size: 0.85rem;
            color: #5a6f8a;
            border-top: 1px solid #e4eaf2;
            margin-top: 10px;
        }
        .copyright strong {
            color: #0f1a2f;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .sidebar {
                border-left: none;
                padding-left: 0;
            }
            .container {
                padding: 16px;
            }
            h1 {
                font-size: 1.7rem;
                padding-left: 14px;
            }
            h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 700px) {
            .hamburger {
                display: block;
            }
            nav#main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 8px;
                gap: 2px;
                border-top: 1px solid #e4eaf2;
                margin-top: 8px;
            }
            nav#main-nav.open {
                display: flex;
            }
            nav#main-nav a {
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid #f0f4fa;
            }
            .comment-section,
            .rating-section {
                padding: 20px 18px;
            }
            .search-box {
                max-width: 100%;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.4rem;
            }
            .btn {
                width: 100%;
                text-align: center;
            }
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 5px solid #ff6b00;
            padding: 18px 22px;
            border-radius: 12px;
            margin: 1.6rem 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            margin: 1.8rem 0;
        }
        .stat-card {
            background: #f7faff;
            border-radius: 16px;
            padding: 18px 12px;
            text-align: center;
            border: 1px solid #e4eaf2;
        }
        .stat-card .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ff6b00;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #5a6f8a;
        }
        .flag {
            font-size: 1.2rem;
            margin-right: 4px;
        }
        .inline-link {
            font-weight: 600;
            border-bottom: 1px dotted #ff6b00;
        }
        .inline-link:hover {
            border-bottom-style: solid;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.6rem 0;
            border-radius: 12px;
            border: 1px solid #e4eaf2;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #eef3f9;
        }
        th {
            background: #f0f4fa;
            font-weight: 700;
            color: #0f1a2f;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #fafdff;
        }