*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #0a4a7a;
            --primary-light: #1a7ab5;
            --secondary: #f5a623;
            --accent: #e74c3c;
            --bg: #f4f7fb;
            --card: #ffffff;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --border: #d0d8e0;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #0d3b5e 100%);
            color: #fff;
            padding: 0 0 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 10px 20px;
            max-width: 1140px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            color: var(--secondary);
        }
        .my-logo span {
            font-weight: 300;
            font-size: 0.7rem;
            opacity: 0.85;
            display: block;
            line-height: 1.1;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 12px;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 4px 16px;
            align-items: center;
            list-style: none;
        }
        .nav-menu li a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a.active {
            color: #fff;
            border-bottom-color: var(--secondary);
        }
        .breadcrumb {
            padding: 6px 20px 2px 20px;
            max-width: 1140px;
            margin: 0 auto;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }
        main {
            padding: 30px 0 50px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
        }
        @media(max-width:860px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .article-body h1 i {
            color: var(--secondary);
        }
        .article-body .subhead {
            font-size: 1.05rem;
            color: var(--text-light);
            margin-bottom: 20px;
            border-left: 4px solid var(--secondary);
            padding-left: 16px;
        }
        .last-updated {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .last-updated i {
            color: var(--secondary);
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 40px;
            margin-bottom: 12px;
            color: var(--primary);
            border-bottom: 2px solid var(--border);
            padding-bottom: 6px;
        }
        .article-body h2 i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 8px;
            color: #0d3b5e;
        }
        .article-body h3 i {
            color: var(--secondary);
            margin-right: 6px;
        }
        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-top: 20px;
            margin-bottom: 6px;
            color: #1a4a6a;
        }
        .article-body p {
            margin-bottom: 16px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 6px;
        }
        .article-body strong {
            color: #0a2a3a;
        }
        .hero-img-wrap {
            margin: 20px 0 28px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #e8edf2;
        }
        .hero-img-wrap img {
            width: 100%;
            height: auto;
            aspect-ratio: 1200/630;
            object-fit: cover;
        }
        .hero-img-wrap figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: #f0f3f6;
            border-top: 1px solid var(--border);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            margin-bottom: 20px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 6px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li a {
            font-size: 0.9rem;
        }
        .sidebar-card ul li a i {
            color: var(--secondary);
            width: 18px;
            margin-right: 4px;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 16px 0;
        }
        .search-form input {
            flex: 1;
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary-light);
        }
        .search-form button {
            padding: 10px 18px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .search-form button:hover {
            background: var(--primary-light);
        }
        .user-feedback {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-top: 40px;
        }
        .user-feedback h2 {
            margin-top: 0 !important;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 8px;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 16px;
        }
        @media(max-width:600px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 10px;
            padding: 16px 20px;
            border: 1px solid var(--border);
        }
        .feedback-card h3 {
            font-size: 1.1rem;
            margin-top: 0 !important;
            margin-bottom: 10px !important;
            color: var(--primary);
        }
        .feedback-card label {
            font-weight: 500;
            font-size: 0.9rem;
            display: block;
            margin-top: 10px;
            margin-bottom: 4px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            width: 100%;
            padding: 8px 12px;
            border: 2px solid var(--border);
            border-radius: 6px;
            font-size: 0.9rem;
            font-family: var(--font);
            outline: none;
            transition: var(--transition);
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--primary-light);
        }
        .feedback-card textarea {
            min-height: 70px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            margin-top: 12px;
            padding: 10px 20px;
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
            width: 100%;
        }
        .feedback-card .btn-submit:hover {
            background: #e6951f;
            transform: translateY(-1px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin: 6px 0 4px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.6rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: var(--secondary);
        }
        .site-footer {
            background: #0a1a2a;
            color: rgba(255, 255, 255, 0.8);
            padding: 30px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }
        @media(max-width:600px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .footer-inner h4 {
            color: var(--secondary);
            font-size: 1rem;
            margin-bottom: 10px;
        }
        .footer-inner p,
        .footer-inner li {
            font-size: 0.9rem;
            line-height: 1.6;
        }
        friend-link {
            display: block;
            margin-top: 6px;
        }
        friend-link a {
            color: #8ab8d8;
            margin-right: 12px;
            font-size: 0.9rem;
        }
        friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            max-width: 1120px;
            margin: 20px auto 0;
            padding: 16px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        @media(max-width:720px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 8px;
                gap: 2px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 8px 0;
                font-size: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                width: 100%;
            }
            .article-body h1 {
                font-size: 1.6rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo span {
                font-size: 0.6rem;
            }
        }
        .btn-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: var(--primary);
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
            z-index: 99;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .btn-top:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
        }
        .highlight-box {
            background: #eef6fe;
            border-left: 4px solid var(--primary-light);
            padding: 16px 20px;
            border-radius: 0 10px 10px 0;
            margin: 18px 0;
        }
        .highlight-box i {
            color: var(--primary-light);
            margin-right: 6px;
        }
        .emoji-big {
            font-size: 1.3rem;
        }
        .inline-icon {
            color: var(--secondary);
            margin-right: 4px;
        }