*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f7f9fc;
            color: #1a2634;
            line-height: 1.8;
            padding: 0 1rem;
        }
        a {
            color: #c44536;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #772e1f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #1a2634;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 1.2rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.9rem;
            margin-top: 3rem;
            margin-bottom: 0.9rem;
            border-left: 6px solid #c44536;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.45rem;
            margin-top: 2.2rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.15rem;
            margin-top: 1.6rem;
            margin-bottom: 0.4rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.4rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 0.5rem;
        }
        .badge {
            display: inline-block;
            background: #c44536;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .highlight {
            background: #fff3cd;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.6rem;
            vertical-align: middle;
        }
        .site-header {
            background: #ffffff;
            border-radius: 0 0 20px 20px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            padding: 0.8rem 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
            margin-bottom: 0.2rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #1a2634;
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo span {
            color: #c44536;
        }
        .my-logo i {
            font-size: 2rem;
            color: #c44536;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.92;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 1.6rem;
            flex-wrap: wrap;
        }
        .nav-bar a {
            font-weight: 600;
            color: #1a2634;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-bar a:hover {
            border-bottom-color: #c44536;
            color: #c44536;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a2634;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            transition: color 0.2s;
        }
        .hamburger:hover {
            color: #c44536;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #ffffffdd;
            backdrop-filter: blur(4px);
            padding: 0.6rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            margin: 0.6rem 0 1.8rem 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }
        .breadcrumb a {
            color: #2c3e50;
        }
        .breadcrumb a:hover {
            color: #c44536;
        }
        .breadcrumb .current {
            color: #6c757d;
            font-weight: 600;
        }
        .search-section {
            background: #ffffff;
            border-radius: 20px;
            padding: 2rem 1.8rem;
            margin: 2rem 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 0.9rem 1.4rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
            background: #f8fafc;
        }
        .search-form input:focus {
            border-color: #c44536;
        }
        .search-form button {
            background: #c44536;
            color: #fff;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .search-form button:hover {
            background: #a13629;
            transform: scale(1.02);
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.8rem 0;
        }
        @media (max-width:700px) {
            .user-feedback {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.8rem 2rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .feedback-card input,
        .feedback-card textarea {
            padding: 0.8rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            font-family: inherit;
            transition: border-color 0.2s;
            background: #f8fafc;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: #c44536;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card button {
            background: #1a2634;
            color: #fff;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #c44536;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.4rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating i {
            transition: color 0.15s;
        }
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #f6b83d;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #e2e8f0;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f6b83d;
        }
        .star-rating input:checked~label {
            color: #f6b83d;
        }
        .feature-img {
            margin: 2.2rem 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .feature-img figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #6c757d;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f6;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #4a5b6e;
            margin-bottom: 1.4rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .site-footer {
            background: #1a2634;
            color: #e2e8f0;
            border-radius: 24px 24px 0 0;
            padding: 2.8rem 2rem 2rem;
            margin: 3rem -1rem -1rem -1rem;
        }
        .site-footer .container {
            max-width: 1120px;
            margin: 0 auto;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.8rem 3rem;
            justify-content: center;
            margin-bottom: 1.8rem;
        }
        .footer-links a {
            color: #b0c4d8;
            font-weight: 500;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        friend-link {
            display: block;
            text-align: center;
            font-size: 0.95rem;
            color: #b0c4d8;
            margin-bottom: 1.2rem;
            word-spacing: 0.5rem;
        }
        friend-link a {
            color: #e2e8f0;
            font-weight: 600;
            margin: 0 0.3rem;
        }
        friend-link a:hover {
            color: #f6b83d;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            font-size: 0.85rem;
            color: #8a9db0;
            border-top: 1px solid #2c3e50;
            padding-top: 1.4rem;
            margin-top: 0.6rem;
        }
        .copyright strong {
            color: #e2e8f0;
        }
        .toc {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.8rem 2rem;
            margin: 2rem 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
            border: 1px solid #edf2f7;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            margin: 0;
            columns: 2;
            column-gap: 2rem;
        }
        .toc li {
            margin-bottom: 0.4rem;
            break-inside: avoid;
        }
        .toc a {
            display: block;
            padding: 0.3rem 0.6rem;
            border-radius: 8px;
            transition: background 0.15s;
        }
        .toc a:hover {
            background: #f1f5f9;
            text-decoration: none;
        }
        @media (max-width:600px) {
            .toc ul {
                columns: 1;
            }
        }
        @media (max-width:768px) {
            .site-header {
                padding: 0.6rem 1rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.6rem;
                padding: 1rem 0 0.4rem 0;
                border-top: 2px solid #edf2f7;
                margin-top: 0.6rem;
            }
            .nav-bar a {
                font-size: 1.05rem;
                padding: 0.5rem 0;
            }
            .hamburger {
                display: block;
            }
            #nav-toggle:checked~.nav-bar {
                display: flex;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 0.2rem;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .feedback-card {
                padding: 1.4rem;
            }
            .site-footer {
                padding: 2rem 1.2rem 1.6rem;
                margin-left: -1rem;
                margin-right: -1rem;
            }
        }
        @media (max-width:420px) {
            .breadcrumb {
                font-size: 0.75rem;
                padding: 0.4rem 0.8rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        .text-muted {
            color: #6c757d;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 0.6rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .gap-1 {
            gap: 1rem;
        }
        .rounded-full {
            border-radius: 999px;
        }
        .shadow-soft {
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }