*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fc;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #2a6f97;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #0f3b5e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1c2e;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.4rem;
            margin-bottom: 0.8rem;
            border-left: 5px solid #2a6f97;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.15rem;
            margin-top: 1.2rem;
            margin-bottom: 0.4rem;
            color: #2a4d6e;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.2rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        strong {
            color: #0b1c2e;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0b1c2e 0%, #1a3349 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;
            color: #f0c94b;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: linear-gradient(135deg, #f0c94b, #f4a261);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #b0c4d9;
            color: #b0c4d9;
            display: block;
            font-weight: 400;
            letter-spacing: 2px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #d4e2f0;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 0.4rem;
        }
        .breadcrumb {
            background: #e9edf4;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce2ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #7a8aa0;
        }
        .breadcrumb a {
            color: #2a6f97;
        }
        .breadcrumb .current {
            color: #4a5b72;
            font-weight: 600;
        }
        .hero-section {
            margin: 2rem 0 1.5rem;
            position: relative;
        }
        .hero-img {
            width: 100%;
            border-radius: 18px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            object-fit: cover;
            max-height: 460px;
        }
        .hero-caption {
            font-size: 0.85rem;
            color: #5a6f85;
            margin-top: 0.4rem;
            text-align: center;
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: #eef3fa;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2a4d6e;
            margin-bottom: 1.2rem;
            border: 1px solid #dce2ec;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .info-box {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            margin: 1.6rem 0;
            border-left: 6px solid #2a6f97;
        }
        .info-box.warning {
            border-left-color: #e9b35f;
        }
        .info-box.success {
            border-left-color: #4a9e6f;
        }
        .toc {
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            margin: 1.6rem 0;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.2rem;
            color: #0b1c2e;
        }
        .toc ul {
            list-style: none;
            margin: 0.6rem 0 0;
            padding: 0;
            columns: 2 220px;
            column-gap: 2rem;
        }
        .toc li {
            margin-bottom: 0.3rem;
            break-inside: avoid;
        }
        .toc a {
            color: #2a6f97;
            font-weight: 500;
        }
        .toc a:hover {
            color: #0f3b5e;
        }
        .search-section {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            margin: 1.6rem 0;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #dce2ec;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #2a6f97;
        }
        .search-form button {
            background: #2a6f97;
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1a4d6e;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2rem 0;
        }
        @media (max-width:720px) {
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .feedback-card textarea,
        .feedback-card input[type="text"],
        .feedback-card input[type="number"] {
            padding: 0.7rem 1rem;
            border: 2px solid #dce2ec;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
            resize: vertical;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #2a6f97;
        }
        .feedback-card button {
            background: #2a6f97;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #1a4d6e;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #e0c080;
            cursor: pointer;
        }
        .star-rating i {
            transition: color 0.15s, transform 0.1s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #f4a261;
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            margin: 1.6rem 0;
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        friend-link ul {
            list-style: none;
            margin: 0.6rem 0 0;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.6rem;
        }
        friend-link li {
            margin: 0;
        }
        friend-link a {
            color: #2a6f97;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #0f3b5e;
        }
        .site-footer {
            background: #0b1c2e;
            color: #b0c4d9;
            padding: 2rem 0 1.2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem 2rem;
            margin-bottom: 1rem;
        }
        .site-footer .footer-links a {
            color: #b0c4d9;
        }
        .site-footer .footer-links a:hover {
            color: #f0c94b;
        }
        .site-footer .copyright {
            border-top: 1px solid #1f3a52;
            padding-top: 1rem;
            margin-top: 0.8rem;
            font-size: 0.8rem;
            color: #7a8aa0;
        }
        @media (max-width:820px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 1rem;
                gap: 0.2rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1rem;
                border-radius: 8px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .container {
                padding: 0 0.9rem;
            }
            .info-box,
            .toc,
            .search-section,
            .feedback-card,
            friend-link {
                padding: 1.2rem 1.2rem;
            }
            .toc ul {
                columns: 1;
            }
        }
        @media (max-width:480px) {
            html {
                font-size: 15px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .hero-img {
                max-height: 220px;
            }
            .search-form button {
                padding: 0.7rem 1.2rem;
            }
        }
        .text-muted {
            color: #5a6f85;
        }
        .mt-1 {
            margin-top: 0.8rem;
        }
        .mb-1 {
            margin-bottom: 0.8rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .badge {
            display: inline-block;
            background: #e9edf4;
            padding: 0.15rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #1e2a3a;
        }
        .divider {
            border: none;
            height: 2px;
            background: linear-gradient(90deg, transparent, #d4e2f0, transparent);
            margin: 2rem 0;
        }
        .anchor-offset {
            scroll-margin-top: 90px;
        }