* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f4f7fc;
            color: #1e293b;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #1e4b8a;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #c9780b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(145deg, #0c1e33 0%, #132a44 100%);
            padding: 16px 0;
            border-bottom: 4px solid #c9780b;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            color: #f0c27a;
            text-shadow: 0 2px 8px rgba(201, 120, 11, 0.4);
            letter-spacing: 1px;
        }
        .my-logo span {
            color: #fff;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #f5d99b;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 8px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list li a {
            color: #e0e9f5;
            font-weight: 500;
            font-size: 15px;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: rgba(201, 120, 11, 0.25);
            color: #f0c27a;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 28px;
            color: #f0c27a;
            cursor: pointer;
            padding: 4px 8px;
        }
        .nav-open .nav-list {
            display: flex;
            flex-direction: column;
            width: 100%;
            margin-top: 12px;
            gap: 4px;
        }
        .nav-open .nav-list li a {
            display: block;
            padding: 10px 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .breadcrumb {
            background: #e8edf5;
            padding: 10px 0;
            font-size: 13px;
            color: #4a5a72;
        }
        .breadcrumb a {
            color: #1e4b8a;
        }
        .breadcrumb span {
            margin: 0 6px;
            color: #7a8aa0;
        }
        main {
            padding: 30px 0 50px;
        }
        h1 {
            font-size: 36px;
            font-weight: 800;
            color: #0c1e33;
            margin-bottom: 10px;
            line-height: 1.25;
        }
        h2 {
            font-size: 28px;
            font-weight: 700;
            color: #132a44;
            margin-top: 48px;
            margin-bottom: 16px;
            border-left: 6px solid #c9780b;
            padding-left: 18px;
        }
        h3 {
            font-size: 22px;
            font-weight: 600;
            color: #1e3a5f;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
            color: #2c4a6e;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 18px;
            font-size: 16px;
        }
        .meta-info {
            color: #5a6a82;
            font-size: 14px;
            border-bottom: 1px solid #dce3ed;
            padding-bottom: 14px;
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .meta-info i {
            margin-right: 6px;
            color: #c9780b;
        }
        .featured-img {
            margin: 28px 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }
        .highlight-box {
            background: #eef3fb;
            border-left: 6px solid #c9780b;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #0c1e33;
        }
        ul,
        ol {
            margin: 12px 0 20px 24px;
        }
        li {
            margin-bottom: 8px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        th,
        td {
            padding: 14px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #132a44;
            color: #f0c27a;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8faff;
        }
        .search-section {
            background: #eef3fb;
            border-radius: 16px;
            padding: 28px 30px;
            margin: 40px 0;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 640px;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border: 2px solid #ccd7e6;
            border-radius: 10px;
            font-size: 16px;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input[type="text"]:focus {
            border-color: #c9780b;
        }
        .search-form button {
            padding: 14px 30px;
            background: #132a44;
            color: #f0c27a;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.1s;
        }
        .search-form button:hover {
            background: #1e3a5f;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 48px 0;
        }
        @media (max-width: 768px) {
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 28px 30px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .card h3 {
            margin-top: 0;
            font-size: 22px;
        }
        .card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 12px;
        }
        .card form input,
        .card form textarea,
        .card form select {
            padding: 12px 16px;
            border: 2px solid #dce3ed;
            border-radius: 10px;
            font-size: 15px;
            font-family: inherit;
            outline: none;
            transition: border 0.3s;
        }
        .card form input:focus,
        .card form textarea:focus,
        .card form select:focus {
            border-color: #c9780b;
        }
        .card form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .card form button {
            padding: 14px 24px;
            background: #c9780b;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.1s;
        }
        .card form button:hover {
            background: #b06809;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 28px;
            color: #d1d9e6;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .link-list {
            background: #f0f4fa;
            border-radius: 14px;
            padding: 20px 24px;
            margin: 28px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        .link-list a {
            font-weight: 500;
        }
        friend-link {
            display: block;
            background: #0c1e33;
            color: #cbd5e1;
            padding: 28px 0;
            margin-top: 40px;
            border-top: 4px solid #c9780b;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 28px;
            justify-content: center;
        }
        friend-link a {
            color: #f0c27a;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #fff;
        }
        footer {
            background: #071220;
            color: #9aabbf;
            padding: 24px 0;
            font-size: 14px;
            text-align: center;
            border-top: 1px solid #1a2f48;
        }
        footer a {
            color: #c9780b;
        }
        @media (max-width: 900px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                width: 100%;
            }
            .nav-list li a {
                font-size: 16px;
            }
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 24px;
            }
            h3 {
                font-size: 20px;
            }
            .header-inner {
                align-items: center;
            }
        }
        @media (min-width: 901px) {
            .nav-list {
                display: flex !important;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            h1 {
                font-size: 24px;
            }
            .search-form input[type="text"] {
                min-width: 100%;
            }
            .search-form button {
                width: 100%;
            }
            .card {
                padding: 20px;
            }
        }
        .toc {
            background: #fff;
            border-radius: 14px;
            padding: 20px 26px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
            margin: 24px 0 32px;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            margin: 8px 0 0 20px;
        }
        .toc a {
            color: #1e4b8a;
        }
        .badge {
            display: inline-block;
            background: #c9780b;
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .btn-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #132a44;
            color: #f0c27a;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: background 0.3s;
            cursor: pointer;
            border: none;
            z-index: 999;
        }
        .btn-top:hover {
            background: #1e3a5f;
            color: #fff;
        }