*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f9fc;
            color: #1e2a3a;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        a {
            color: #2a6f97;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #1a4b6d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2b42 0%, #1a4b6d 100%);
            color: #fff;
            padding: 16px 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;
            background: rgba(255, 255, 255, 0.12);
            padding: 6px 18px;
            border-radius: 40px;
            transition: background 0.3s;
            display: inline-block;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.22);
            text-decoration: none;
            color: #fff;
        }
        .my-logo span {
            color: #f7d44a;
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 12px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .nav-menu {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e0edf5;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: background 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            text-decoration: none;
        }
        .nav-menu a.active {
            background: #f7d44a;
            color: #1a2a3a;
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 8px 0 4px;
            color: #7a8a9e;
        }
        .breadcrumb a {
            color: #2a6f97;
        }
        .breadcrumb .current {
            color: #4a5a6e;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        @media(max-width:960px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        .article-body h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #0b2b42;
        }
        .article-body h1 .highlight {
            color: #2a6f97;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.95rem;
            color: #5a6a7e;
            margin-bottom: 28px;
            border-bottom: 1px solid #dce3ec;
            padding-bottom: 18px;
        }
        .article-body .meta i {
            margin-right: 6px;
            color: #2a6f97;
        }
        .article-body h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #0b2b42;
            border-left: 6px solid #f7d44a;
            padding-left: 18px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1a4b6d;
        }
        .article-body h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #2a5a7a;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: #2a3a4a;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 28px;
            font-size: 1.05rem;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body strong {
            color: #0b2b42;
            font-weight: 700;
        }
        .article-body .emoji-lg {
            font-size: 1.4rem;
            margin-right: 4px;
        }
        .article-body .callout {
            background: #eaf4fb;
            border-left: 6px solid #2a6f97;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            font-style: normal;
        }
        .article-body .callout strong {
            color: #1a4b6d;
        }
        .article-body .feature-image {
            margin: 32px 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .article-body .feature-image figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #5a6a7e;
            margin-top: 10px;
            font-style: italic;
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 28px 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0b2b42;
            border-bottom: 2px solid #f0f4fa;
            padding-bottom: 12px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 10px;
        }
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: 10px;
            background: #f8f9fc;
            transition: background 0.2s, transform 0.1s;
            font-weight: 500;
        }
        .sidebar a:hover {
            background: #eaf4fb;
            transform: translateX(4px);
            text-decoration: none;
        }
        .sidebar a i {
            color: #2a6f97;
            width: 20px;
            text-align: center;
        }
        .search-box {
            margin: 32px 0 24px;
            background: #fff;
            border-radius: 60px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            display: flex;
            overflow: hidden;
            border: 1px solid #dce3ec;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .search-box:focus-within {
            border-color: #2a6f97;
            box-shadow: 0 4px 24px rgba(42, 111, 151, 0.15);
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 16px 24px;
            font-size: 1rem;
            outline: none;
            background: transparent;
            font-family: inherit;
            color: #1e2a3a;
        }
        .search-box button {
            background: #2a6f97;
            color: #fff;
            border: none;
            padding: 0 32px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: #1a4b6d;
        }
        .interaction-area {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid #dce3ec;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        @media(max-width:700px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .comment-section,
        .rating-section {
            background: #fff;
            border-radius: 20px;
            padding: 28px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .comment-section h3,
        .rating-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: #0b2b42;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-section form,
        .rating-section form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .comment-section input,
        .comment-section textarea,
        .rating-section select,
        .rating-section button {
            font-family: inherit;
            font-size: 1rem;
            padding: 12px 16px;
            border: 1px solid #dce3ec;
            border-radius: 12px;
            outline: none;
            transition: border-color 0.2s;
            background: #fafbfc;
        }
        .comment-section input:focus,
        .comment-section textarea:focus,
        .rating-section select:focus {
            border-color: #2a6f97;
            background: #fff;
        }
        .comment-section textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-section button,
        .rating-section button {
            background: #2a6f97;
            color: #fff;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.2s;
            padding: 14px 24px;
            border-radius: 40px;
            align-self: flex-start;
        }
        .comment-section button:hover,
        .rating-section button:hover {
            background: #1a4b6d;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #dce3ec;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
            color: #dce3ec;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f7c948;
        }
        .site-footer {
            background: #0b2b42;
            color: #c8d6e5;
            padding: 48px 0 32px;
            margin-top: 40px;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        @media(max-width:760px) {
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .site-footer h4 {
            color: #f7d44a;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .site-footer a {
            color: #a0b8cc;
            display: inline-block;
            margin-bottom: 6px;
        }
        .site-footer a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            padding: 20px 24px;
            border-radius: 16px;
            margin-top: 12px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a {
            display: inline-block;
            margin-right: 20px;
            margin-bottom: 8px;
            color: #a0b8cc;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #f7d44a;
        }
        .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 12px;
            font-size: 0.9rem;
            color: #7a9aae;
        }
        @media(max-width:760px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 16px 0 8px;
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 12px 16px;
                width: 100%;
                border-radius: 8px;
            }
            .article-body h1 {
                font-size: 2rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.25rem;
            }
            .sidebar {
                position: static;
                margin-top: 28px;
            }
            .search-box {
                flex-direction: column;
                border-radius: 20px;
            }
            .search-box button {
                padding: 14px 24px;
                justify-content: center;
            }
            .my-logo {
                font-size: 1.4rem;
                padding: 4px 14px;
            }
        }
        @media(max-width:480px) {
            .container {
                padding: 0 16px;
            }
            .article-body h1 {
                font-size: 1.7rem;
            }
            .article-body p {
                font-size: 1rem;
            }
            .interaction-grid {
                gap: 20px;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .tag {
            display: inline-block;
            background: #eaf4fb;
            color: #1a4b6d;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 6px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 28px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.98rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        th,
        td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid #eef2f7;
        }
        th {
            background: #0b2b42;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8f9fc;
        }