*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            font-size: 1.05rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0b3b5c;
            text-decoration: underline;
        }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 8px;
            background: #1e6f9f;
            color: #fff;
            padding: 8px 18px;
            border-radius: 0 0 6px 6px;
            z-index: 1000;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #0f2b3d 0%, #1a4a62 100%);
            color: #fff;
            padding: 12px 0 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #facc15;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            padding: 4px 18px 4px 14px;
            border-radius: 40px;
            transition: background 0.25s;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.14);
            text-decoration: none;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #facc15;
        }
        .my-logo small {
            font-size: 0.75rem;
            font-weight: 400;
            opacity: 0.75;
            letter-spacing: 0.3px;
            margin-left: 4px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px 18px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list a {
            color: #e2e8f0;
            font-weight: 500;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .nav-list a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .nav-list a.active {
            color: #facc15;
            border-bottom: 2px solid #facc15;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.6rem;
            padding: 4px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: border 0.2s;
        }
        .hamburger:hover {
            border-color: #facc15;
        }
        .hamburger i {
            pointer-events: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 8px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d8e0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            align-items: center;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #64748b;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1e6f9f;
        }
        .breadcrumb .current {
            color: #334155;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0f2b3d;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        h1 i {
            color: #f59e0b;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1a4a62;
            margin-top: 48px;
            margin-bottom: 18px;
            border-left: 6px solid #f59e0b;
            padding-left: 18px;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1e3a5f;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2c4c6e;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 18px;
            color: #1e293b;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #334155;
            background: #eef2f6;
            padding: 18px 24px;
            border-radius: 12px;
            border-left: 6px solid #f59e0b;
        }
        .highlight-box {
            background: #fef9e7;
            border: 1px solid #fde68a;
            border-radius: 12px;
            padding: 20px 24px;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #b45309;
        }
        .emoji-big {
            font-size: 1.8rem;
            margin-right: 6px;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin: 28px 0;
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 22px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            transition: transform 0.25s, box-shadow 0.3s;
            border: 1px solid #e9edf2;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.09);
        }
        .card i {
            font-size: 2.2rem;
            color: #f59e0b;
            margin-bottom: 10px;
        }
        .card h4 {
            margin-top: 0;
        }
        .featured-image {
            margin: 32px 0 28px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            background: #e9edf2;
        }
        .featured-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 12px 20px;
            background: #fff;
            font-size: 0.92rem;
            color: #475569;
            border-top: 1px solid #e9edf2;
        }
        .inline-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            list-style: none;
            padding: 0;
            margin: 18px 0 24px;
        }
        .inline-links li a {
            background: #eef2f6;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            color: #1e6f9f;
            transition: background 0.2s, color 0.2s;
            display: inline-block;
            border: 1px solid #d0d8e0;
        }
        .inline-links li a:hover {
            background: #1e6f9f;
            color: #fff;
            text-decoration: none;
            border-color: #1e6f9f;
        }
        .form-section {
            background: #fff;
            border-radius: 16px;
            padding: 28px 30px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
            border: 1px solid #e9edf2;
            margin: 32px 0;
        }
        .form-section h3 {
            margin-top: 0;
            border-bottom: 2px solid #f59e0b;
            padding-bottom: 8px;
            display: inline-block;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            color: #1e3a5f;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #d0d8e0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.2s, box-shadow 0.2s;
            background: #fafcfd;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #f59e0b;
            box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #0f4a6e;
            transform: scale(1.02);
        }
        .btn-warning {
            background: #f59e0b;
        }
        .btn-warning:hover {
            background: #d97706;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 2rem;
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d0d8e0;
            transition: color 0.2s, transform 0.15s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f59e0b;
            transform: scale(1.1);
        }
        .comment-item {
            background: #f8fafc;
            border-radius: 12px;
            padding: 16px 20px;
            margin-bottom: 12px;
            border-left: 4px solid #1e6f9f;
        }
        .comment-item .meta {
            font-size: 0.85rem;
            color: #64748b;
            display: flex;
            gap: 16px;
            margin-bottom: 4px;
        }
        .comment-item .meta strong {
            color: #1e293b;
        }
        .site-footer {
            background: #0f2b3d;
            color: #cbd5e1;
            padding: 40px 0 20px;
            border-top: 6px solid #f59e0b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .site-footer h4 {
            color: #facc15;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #facc15;
        }
        .friend-link {
            display: block;
            padding: 6px 0;
            font-size: 0.95rem;
        }
        .friend-link a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .copyright {
            border-top: 1px solid #1e4a62;
            padding-top: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .copyright strong {
            color: #facc15;
        }
        .schema-hidden {
            display: none;
        }
        @media (max-width: 820px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(15, 43, 61, 0.97);
                padding: 14px 18px;
                border-radius: 12px;
                margin-top: 6px;
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                font-size: 1.05rem;
                padding: 8px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .my-logo {
                font-size: 1.5rem;
                padding: 2px 14px 2px 10px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 14px;
            }
            .form-section {
                padding: 18px 16px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb ol {
                font-size: 0.82rem;
                gap: 4px 8px;
            }
        }
        @media (max-width: 460px) {
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.35rem;
                padding-left: 12px;
            }
            .lead {
                font-size: 1rem;
                padding: 14px 16px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .byline {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            font-size: 0.92rem;
            color: #64748b;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid #e2e8f0;
        }
        .byline i {
            margin-right: 4px;
        }
        .byline .author {
            font-weight: 600;
            color: #1e293b;
        }
        .toc {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 14px;
            padding: 20px 26px;
            margin: 20px 0 32px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .toc summary {
            font-size: 1.2rem;
            font-weight: 700;
            color: #1a4a62;
            cursor: pointer;
        }
        .toc ol {
            margin-top: 12px;
            padding-left: 24px;
            columns: 2 240px;
            column-gap: 32px;
        }
        .toc ol li {
            margin-bottom: 4px;
            break-inside: avoid;
        }
        .toc a {
            color: #1e6f9f;
        }