*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fc;
            color: #1a1a2e;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #004e92;
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover {
            color: #ff6b35;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        p {
            margin-bottom: 1.2rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0d1b2a;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.2rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #ff6b35;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #1b2838;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c3e50;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0d1b2a 0%, #1b3a5c 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo span {
            color: #ff6b35;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #ffd700;
        }
        .my-logo:hover {
            color: #ffd700;
        }
        .my-logo:hover span {
            color: #fff;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.2rem;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            color: #e0e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: all 0.25s;
        }
        .nav-list li a:hover {
            color: #ffd700;
            border-bottom-color: #ff6b35;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            transition: color 0.2s;
        }
        .hamburger:hover {
            color: #ffd700;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #e9edf5;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d8e8;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.4rem 0.6rem;
        }
        .breadcrumb ol li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #888;
        }
        .breadcrumb a {
            color: #004e92;
        }
        .breadcrumb .current {
            color: #555;
            font-weight: 500;
        }
        .search-section {
            background: #fff;
            padding: 1.5rem 0;
            border-bottom: 1px solid #e0e6f0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
            border: 1px solid #dce4f0;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.8rem 1.5rem;
            border: none;
            outline: none;
            font-size: 1rem;
            background: #fafcff;
        }
        .search-form button {
            background: #004e92;
            color: #fff;
            border: none;
            padding: 0 1.8rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.25s;
        }
        .search-form button:hover {
            background: #ff6b35;
        }
        .main-wrap {
            padding: 2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: #fff;
            border-radius: 18px;
            padding: 2.2rem 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        @media(max-width:600px) {
            .article-body {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
        }
        .article-body .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.9rem;
            color: #666;
            border-bottom: 1px solid #eef2f8;
            padding-bottom: 1rem;
            margin-bottom: 1.5rem;
        }
        .article-body .meta-info i {
            margin-right: 0.4rem;
            color: #ff6b35;
        }
        .featured-img {
            border-radius: 14px;
            margin: 1.8rem 0 2.2rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-img figcaption {
            font-size: 0.85rem;
            color: #777;
            margin-top: 0.5rem;
            text-align: center;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.8rem 0;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 500px;
        }
        .table-wrap th {
            background: #0d1b2a;
            color: #fff;
            padding: 0.8rem 1rem;
            text-align: left;
        }
        .table-wrap td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e8ecf4;
        }
        .table-wrap tr:nth-child(even) {
            background: #f8faff;
        }
        .table-wrap tr:hover td {
            background: #fff4e8;
        }
        .highlight-box {
            background: #f0f6ff;
            border-left: 5px solid #ff6b35;
            padding: 1.5rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.8rem 0;
        }
        .highlight-box strong {
            color: #0d1b2a;
        }
        .tip-box {
            background: #fef9e7;
            border-left: 5px solid #ffd700;
            padding: 1.4rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.8rem 0;
        }
        .tip-box i {
            color: #f5a623;
            margin-right: 0.5rem;
        }
        .article-body ul.check-list {
            list-style: none;
            padding-left: 0;
        }
        .article-body ul.check-list li {
            padding-left: 2rem;
            position: relative;
        }
        .article-body ul.check-list li::before {
            content: "✅";
            position: absolute;
            left: 0;
            color: #2e7d32;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            margin-top: 0;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f0f2f6;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card ul li a i {
            color: #ff6b35;
            width: 1.2rem;
        }
        .rating-area,
        .comment-area {
            margin-top: 2.5rem;
            padding-top: 1.8rem;
            border-top: 2px solid #eef2f8;
        }
        .rating-area h3,
        .comment-area h3 {
            margin-top: 0;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
            font-size: 1.8rem;
            margin: 0.6rem 0 1rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #ddd;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ffd700;
        }
        .rating-form button,
        .comment-form button {
            background: #004e92;
            color: #fff;
            border: none;
            padding: 0.6rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            font-weight: 600;
        }
        .rating-form button:hover,
        .comment-form button:hover {
            background: #ff6b35;
        }
        .comment-form textarea {
            width: 100%;
            border: 1px solid #dce4f0;
            border-radius: 12px;
            padding: 1rem;
            font-family: inherit;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 100px;
            margin: 0.5rem 0 1rem;
            background: #fafcff;
        }
        .comment-form input[type="text"] {
            width: 100%;
            border: 1px solid #dce4f0;
            border-radius: 10px;
            padding: 0.7rem 1rem;
            font-size: 0.95rem;
            margin: 0.3rem 0 0.8rem;
            background: #fafcff;
        }
        .comment-form .form-row {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .comment-form .form-row>* {
            flex: 1;
            min-width: 180px;
        }
        .site-footer {
            background: #0d1b2a;
            color: #c8d4e0;
            padding: 2.5rem 0 1.2rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 1.8rem;
        }
        @media(max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .footer-grid h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0.8rem 0 0;
        }
        .footer-grid ul li {
            padding: 0.25rem 0;
        }
        .footer-grid ul li a {
            color: #b0c4de;
        }
        .footer-grid ul li a:hover {
            color: #ffd700;
        }
        friend-link {
            display: block;
            background: #1a2d44;
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            margin: 1.2rem 0 1.8rem;
            color: #e0e8f0;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #ffd700;
            margin: 0 0.5rem;
        }
        friend-link a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid #2a3f5a;
            padding-top: 1.2rem;
            font-size: 0.85rem;
            color: #8aa0b8;
        }
        .copyright a {
            color: #ffd700;
        }
        @media(max-width:768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0d1b2a;
                padding: 1rem 0;
                margin-top: 0.8rem;
                border-top: 1px solid #2a3f5a;
                gap: 0.4rem;
            }
            .nav-list li {
                text-align: center;
            }
            .nav-list li a {
                display: block;
                padding: 0.6rem 1rem;
            }
            #nav-toggle:checked~.nav-list {
                display: flex;
            }
            .header-inner {
                position: relative;
            }
            .nav-wrap {
                flex-wrap: wrap;
                width: 100%;
            }
            #nav-toggle:checked~.nav-list {
                display: flex !important;
            }
            .nav-list {
                display: none;
            }
        }
        .text-small {
            font-size: 0.85rem;
            color: #777;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            align-items: center;
        }
        .hidden-schema {
            display: none;
        }
        .article-body p:first-of-type::first-letter {
            font-size: 3.2rem;
            font-weight: 700;
            float: left;
            line-height: 1;
            margin-right: 0.5rem;
            color: #004e92;
            font-family: 'Georgia', serif;
        }
        @media(max-width:600px) {
            .article-body p:first-of-type::first-letter {
                font-size: 2.2rem;
            }
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .tag {
            display: inline-block;
            background: #eef2f8;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: #004e92;
            font-weight: 500;
        }
        .anchor-offset {
            scroll-margin-top: 90px;
        }