*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #b22234;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin-top: 1.8rem;
            margin-bottom: 0.75rem;
            color: #0a1f2e;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
            border-bottom: 4px solid #b22234;
            padding-bottom: 0.5rem;
            display: inline-block;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #b22234;
            padding-left: 1rem;
            margin-top: 2.4rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 1.8rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.2rem;
            color: #2c5282;
            font-weight: 600;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .container {
            padding: 1rem 0 3rem;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
            background: #fff;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #b22234, #0f3b5e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #b22234;
            font-size: 2rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            list-style: none;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .nav-menu li a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            transition: background 0.2s, color 0.2s;
            color: #1e293b;
        }
        .nav-menu li a:hover {
            background: #b22234;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #0f3b5e;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e2e8f0;
        }
        .breadcrumb {
            font-size: 0.9rem;
            padding: 0.6rem 0 0.2rem;
            color: #64748b;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #0f3b5e;
        }
        .breadcrumb a:hover {
            color: #b22234;
        }
        .breadcrumb span {
            color: #94a3b8;
        }
        .search-section {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin: 2rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #e9edf2;
        }
        .search-section form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
            justify-content: center;
        }
        .search-section input[type="text"] {
            flex: 1 1 280px;
            padding: 0.85rem 1.4rem;
            border: 2px solid #d1d9e6;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
            background: #f8fafc;
        }
        .search-section input[type="text"]:focus {
            border-color: #b22234;
            background: #fff;
        }
        .search-section button {
            padding: 0.85rem 2.2rem;
            background: #0f3b5e;
            color: #fff;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-section button:hover {
            background: #b22234;
            transform: translateY(-2px);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e9edf2;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: #0f3b5e;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            margin-top: 1rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.75rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.25s;
            background: #f8fafc;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #b22234;
            background: #fff;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card button {
            padding: 0.75rem 1.8rem;
            background: #b22234;
            color: #fff;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #0f3b5e;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #d1d9e6;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f59e0b;
        }
        .feature-img-wrap {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }
        .feature-img-wrap img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            display: block;
        }
        .feature-img-wrap figcaption {
            background: #0a1f2e;
            color: #e2e8f0;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            text-align: center;
        }
        .highlight-box {
            background: #eef2f7;
            border-left: 6px solid #b22234;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .insight-badge {
            display: inline-block;
            background: #b22234;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .site-footer {
            margin-top: 3.5rem;
            padding: 2.2rem 0 1.5rem;
            border-top: 2px solid #e2e8f0;
            background: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            align-items: start;
        }
        .footer-copy {
            font-size: 0.9rem;
            color: #64748b;
        }
        .footer-copy strong {
            color: #0f3b5e;
        }
        friend-link {
            display: block;
            background: #f1f5f9;
            padding: 1rem 1.5rem;
            border-radius: 12px;
            font-size: 0.95rem;
            color: #1e293b;
            border: 1px solid #dee4ed;
        }
        friend-link a {
            font-weight: 600;
            color: #0f3b5e;
            margin: 0 0.3rem;
        }
        friend-link a:hover {
            color: #b22234;
        }
        @media (max-width: 900px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 1rem 0.5rem;
                border-radius: 12px;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
                margin-top: 0.8rem;
                border: 1px solid #e2e8f0;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-wrapper {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
            .site-header {
                padding: 0.8rem 0;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .search-section {
                padding: 1.2rem 1rem;
            }
            .feedback-card {
                padding: 1.2rem 1rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            body {
                padding: 0 0.6rem;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
                padding-left: 0.6rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .search-section input[type="text"] {
                flex: 1 1 100%;
            }
            .search-section button {
                width: 100%;
                justify-content: center;
            }
            .star-rating label {
                font-size: 1.5rem;
            }
        }
        .last-updated {
            display: inline-block;
            background: #f1f5f9;
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: #475569;
            margin: 0.5rem 0 1.2rem;
            border: 1px solid #e2e8f0;
        }
        .toc {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #e9edf2;
            margin: 1.8rem 0;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            columns: 2;
            column-gap: 2rem;
        }
        .toc ol li {
            break-inside: avoid;
            margin-bottom: 0.3rem;
        }
        .toc a {
            color: #0f3b5e;
            font-weight: 500;
        }
        .toc a:hover {
            color: #b22234;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }
        .section-divider {
            border: none;
            height: 1px;
            background: linear-gradient(to right, transparent, #d1d9e6, transparent);
            margin: 2.5rem 0;
        }
        .btn-top {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #0f3b5e;
            color: #fff;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: background 0.25s;
            margin-top: 0.5rem;
        }
        .btn-top:hover {
            background: #b22234;
            text-decoration: none;
            color: #fff;
        }