*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 17px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fb;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 0 2rem 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #1a6bb0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0d3e6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2a3b 0%, #1a4a5f 100%);
            color: #fff;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            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;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #f0c45a;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f7d77b;
        }
        .my-logo i {
            margin-right: 0.4rem;
            color: #7fc1b0;
        }
        .my-logo span {
            font-weight: 300;
            color: #cbd5e1;
            font-size: 1rem;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 1.2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 500;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            color: #f0c45a;
            border-bottom-color: #f0c45a;
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #e9edf4;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce2ec;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #2c5282;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: #94a3b8;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 500;
        }
        main {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .page-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0b2a3b;
            margin-bottom: 0.6rem;
            letter-spacing: -0.5px;
        }
        .page-title i {
            color: #f0c45a;
            margin-right: 0.4rem;
        }
        .page-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            color: #4a5a72;
            font-size: 0.9rem;
            margin-bottom: 1.8rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #dce2ec;
        }
        .page-meta i {
            margin-right: 0.3rem;
            color: #64748b;
        }
        .last-updated {
            font-weight: 600;
            color: #1e293b;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 2.5rem;
        }
        .content-main {
            min-width: 0;
        }
        .content-sidebar {
            position: sticky;
            top: 80px;
            align-self: start;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0b2a3b;
            margin: 0 0 0.5rem 0;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #143549;
            margin: 2.4rem 0 0.8rem 0;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #e2e8f0;
            line-height: 1.25;
        }
        h2 i {
            color: #f0c45a;
            margin-right: 0.5rem;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1e4a62;
            margin: 1.6rem 0 0.5rem 0;
            line-height: 1.3;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #2d5a72;
            margin: 1.2rem 0 0.3rem 0;
            line-height: 1.3;
        }
        p {
            margin-bottom: 1rem;
        }
        .lead {
            font-size: 1.15rem;
            color: #2d3a4f;
            font-weight: 400;
            line-height: 1.8;
        }
        strong {
            color: #0b2a3b;
        }
        em {
            font-style: italic;
            color: #2c5282;
        }
        ul,
        ol {
            margin: 0.5rem 0 1.2rem 1.8rem;
        }
        li {
            margin-bottom: 0.3rem;
        }
        .highlight-box {
            background: #eef4fa;
            border-left: 5px solid #f0c45a;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .stat-card {
            display: inline-block;
            background: #fff;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            margin: 0.8rem 0.5rem 0.8rem 0;
            border: 1px solid #e2e8f0;
            min-width: 140px;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #0b2a3b;
            display: block;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #4a5a72;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .featured-image {
            margin: 1.8rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-image figcaption {
            background: #f1f5f9;
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #4a5a72;
            text-align: center;
            font-style: italic;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 14px;
            padding: 1.4rem 1.4rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            margin-bottom: 1.8rem;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            margin-bottom: 0.8rem;
            border-bottom: 2px solid #eef2f7;
            padding-bottom: 0.5rem;
            color: #0b2a3b;
        }
        .sidebar-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-card li {
            margin-bottom: 0.5rem;
        }
        .sidebar-card a {
            display: block;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            font-size: 0.92rem;
            transition: background 0.2s;
        }
        .sidebar-card a:hover {
            background: #f1f5f9;
            text-decoration: none;
        }
        .sidebar-card a i {
            margin-right: 0.5rem;
            color: #f0c45a;
            width: 1.1rem;
            text-align: center;
        }
        .form-card {
            background: #fff;
            border-radius: 14px;
            padding: 1.6rem 1.8rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            margin: 1.8rem 0;
        }
        .form-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            border-bottom: 2px solid #eef2f7;
            padding-bottom: 0.5rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1e293b;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1.5px solid #d1d9e6;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.2s, box-shadow 0.2s;
            background: #fafcff;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #f0c45a;
            box-shadow: 0 0 0 4px rgba(240, 196, 90, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            padding: 0.7rem 1.8rem;
            background: #0b2a3b;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn:hover {
            background: #1a4a5f;
            transform: translateY(-1px);
        }
        .btn i {
            margin-right: 0.4rem;
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1e293b;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d1d9e6;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f0c45a;
        }
        .comment-item {
            padding: 0.8rem 0;
            border-bottom: 1px solid #eef2f7;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 600;
            color: #0b2a3b;
        }
        .comment-date {
            font-size: 0.8rem;
            color: #64748b;
            margin-left: 0.8rem;
        }
        .comment-text {
            margin-top: 0.2rem;
            color: #2d3a4f;
        }
        .site-footer {
            background: #0b2a3b;
            color: #cbd5e1;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-grid h4 {
            color: #f0c45a;
            font-size: 1.05rem;
            margin-top: 0;
            margin-bottom: 0.6rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 0.4rem;
        }
        .footer-grid a {
            color: #b0c4d9;
            display: block;
            padding: 0.15rem 0;
            font-size: 0.9rem;
        }
        .footer-grid a:hover {
            color: #f0c45a;
            text-decoration: none;
        }
        friend-link {
            display: block;
            margin-top: 0.5rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.3rem;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: #879aab;
        }
        .copyright a {
            color: #b0c4d9;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .sidebar-card {
                margin-bottom: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            html {
                font-size: 15.5px;
            }
            .page-title {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(11, 42, 59, 0.98);
                padding: 1rem 1.2rem;
                border-radius: 0 0 14px 14px;
                gap: 0.6rem;
                margin-top: 0.4rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.4rem 0;
                border-bottom: none;
                font-size: 1rem;
            }
            .content-sidebar {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .stat-card {
                min-width: 100px;
                padding: 0.8rem 1.2rem;
            }
            .stat-card .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .page-title {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .form-card {
                padding: 1rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        :focus-visible {
            outline: 3px solid #f0c45a;
            outline-offset: 2px;
        }
        .scroll-anchor {
            scroll-margin-top: 80px;
        }