*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #b22222;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #8b1a1a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: #0f1a2e;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
            border-bottom: 4px solid #b22222;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #b22222;
            padding-left: 0.75rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 1.8rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c4a6e;
            margin-top: 1.2rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            border-radius: 16px;
            padding: 1.5rem 2rem 2rem;
        }
        .my-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.5rem;
            border-bottom: 2px solid #e0e7ef;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #b22222, #d43f3f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            text-decoration: none !important;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a6b7c;
            color: #5a6b7c;
            letter-spacing: 0;
        }
        .main-nav {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-weight: 600;
            color: #1e2a3a;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .main-nav a:hover {
            background: #b22222;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #1e2a3a;
            padding: 0.2rem 0.5rem;
            border-radius: 6px;
        }
        .hamburger:hover {
            background: #e8ecf1;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumbs {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.8rem 0 0.2rem;
            font-size: 0.9rem;
            color: #5a6b7c;
        }
        .breadcrumbs li+li::before {
            content: "›";
            margin: 0 0.6rem;
            color: #b22222;
        }
        .breadcrumbs a {
            color: #2c4a6e;
        }
        .breadcrumbs a:hover {
            color: #b22222;
        }
        .search-box {
            display: flex;
            max-width: 480px;
            margin: 1.5rem 0 1rem;
            border-radius: 40px;
            overflow: hidden;
            border: 2px solid #d0d8e2;
            background: #fff;
            transition: border-color 0.3s;
        }
        .search-box:focus-within {
            border-color: #b22222;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 0.7rem 1.2rem;
            font-size: 1rem;
            outline: none;
            background: transparent;
        }
        .search-box button {
            background: #b22222;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-box button:hover {
            background: #8b1a1a;
        }
        .feedback-section {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 2.5rem 0 1.5rem;
            padding: 1.5rem 0;
            border-top: 2px solid #e0e7ef;
            border-bottom: 2px solid #e0e7ef;
        }
        .feedback-item {
            flex: 1 1 240px;
        }
        .feedback-item h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-item form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 0.5rem;
        }
        .feedback-item input,
        .feedback-item textarea,
        .feedback-item select {
            width: 100%;
            padding: 0.6rem 0.9rem;
            border: 2px solid #d0d8e2;
            border-radius: 8px;
            font-size: 0.95rem;
            background: #fafcff;
            transition: border-color 0.2s;
        }
        .feedback-item input:focus,
        .feedback-item textarea:focus,
        .feedback-item select:focus {
            border-color: #b22222;
            outline: none;
        }
        .feedback-item textarea {
            min-height: 72px;
            resize: vertical;
        }
        .feedback-item .btn {
            background: #b22222;
            color: #fff;
            border: none;
            padding: 0.55rem 1.4rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .feedback-item .btn:hover {
            background: #8b1a1a;
            transform: scale(0.97);
        }
        .star-select {
            display: flex;
            gap: 0.3rem;
            align-items: center;
            font-size: 1.4rem;
            color: #f5b342;
        }
        .star-select select {
            width: auto;
            font-size: 1rem;
            padding: 0.3rem 0.6rem;
        }
        .feature-image {
            margin: 2rem 0 1.8rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            background: #f0f4fa;
            font-size: 0.9rem;
            color: #3a4b5e;
            font-style: italic;
        }
        .related-links {
            background: #f0f4fa;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.8rem 0;
        }
        .related-links ul {
            columns: 2 280px;
            list-style: none;
            padding: 0;
        }
        .related-links li {
            padding: 0.3rem 0;
        }
        .related-links li::before {
            content: "⚡";
            margin-right: 0.5rem;
            color: #b22222;
        }
        .related-links a {
            font-weight: 500;
        }
        friend-link {
            display: block;
            padding: 1rem 0 0.5rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1.2rem 0.3rem 0;
            font-weight: 500;
        }
        friend-link a::before {
            content: "› ";
            color: #b22222;
            font-weight: 700;
        }
        .site-footer {
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 2px solid #e0e7ef;
            font-size: 0.9rem;
            color: #4a5b6c;
        }
        .site-footer .copyright {
            padding: 1rem 0 0.2rem;
            font-size: 0.85rem;
            color: #6a7b8c;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.6rem;
            }
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .my-header {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 0.8rem 0 0.4rem;
                gap: 0.4rem;
            }
            .main-nav a {
                display: block;
                width: 100%;
                padding: 0.5rem 0.8rem;
            }
            .hamburger {
                display: inline-block;
            }
            #nav-toggle:checked~.main-nav {
                display: flex;
            }
            .related-links ul {
                columns: 1;
            }
            .feedback-section {
                flex-direction: column;
                gap: 1.2rem;
            }
            .breadcrumbs {
                font-size: 0.8rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (min-width: 769px) {
            .hamburger {
                display: none !important;
            }
            .main-nav {
                display: flex !important;
            }
        }
        .highlight {
            background: #fff3e0;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .badge {
            display: inline-block;
            background: #b22222;
            color: #fff;
            font-size: 0.7rem;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            font-weight: 700;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .data-card {
            background: #f8faff;
            border: 1px solid #dce4ef;
            border-radius: 12px;
            padding: 1rem 1.4rem;
            margin: 1.2rem 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }
        .data-card strong {
            color: #b22222;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .last-updated {
            font-size: 0.85rem;
            color: #7a8b9c;
            text-align: right;
            margin-top: 1rem;
        }
        .last-updated i {
            margin-right: 0.3rem;
        }
        blockquote {
            border-left: 4px solid #b22222;
            padding: 0.6rem 1.2rem;
            margin: 1.2rem 0;
            background: #f6f9fe;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #2c3e5a;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.6rem 0.8rem;
            border: 1px solid #dce4ef;
            text-align: left;
        }
        th {
            background: #eef3f9;
            font-weight: 700;
            color: #0f1a2e;
        }
        tr:nth-child(even) {
            background: #f8faff;
        }