*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3c6e;
            --primary-light: #2a5a9e;
            --secondary: #f5a623;
            --accent: #e8f0fe;
            --bg: #fafcfd;
            --text: #1e2a3a;
            --text-light: #4a5a6a;
            --white: #ffffff;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --gap: 2rem;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0 1rem;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--secondary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
            padding: 0 0.5rem;
        }
        header {
            background: var(--white);
            border-bottom: 2px solid var(--accent);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
            background: rgba(255, 255, 255, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--secondary);
            text-decoration: none;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 1.6rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--accent);
        }
        .nav-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            list-style: none;
            align-items: center;
        }
        .nav-list a {
            font-weight: 500;
            padding: 0.3rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            color: var(--text);
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--primary);
            border-bottom-color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb {
            padding: 0.8rem 0 0.2rem;
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #bbb;
            font-size: 0.7rem;
        }
        main {
            flex: 1;
            padding: 1.5rem 0 3rem;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.5rem;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 2rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 1.4rem;
            margin-bottom: 0.4rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: var(--text-light);
            border-left: 4px solid var(--secondary);
            padding-left: 1.2rem;
            margin-bottom: 1.8rem;
        }
        .stat-highlight {
            background: var(--accent);
            border-radius: var(--radius);
            padding: 1.2rem 1.8rem;
            margin: 1.5rem 0;
            border-left: 5px solid var(--secondary);
        }
        .stat-highlight strong {
            color: var(--primary);
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 0.3rem;
        }
        .grid-2,
        .grid-3 {
            display: grid;
            gap: var(--gap);
            margin: 2rem 0;
        }
        .grid-2 {
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        }
        .grid-3 {
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        }
        .card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 1.6rem 1.4rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
        }
        .card h4 {
            margin-top: 0;
        }
        .card i {
            color: var(--secondary);
            font-size: 1.6rem;
            margin-bottom: 0.6rem;
            display: inline-block;
        }
        .feature-img {
            margin: 2rem 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: var(--accent);
            padding: 0.5rem;
        }
        .feature-img img {
            border-radius: calc(var(--radius) - 4px);
            width: 100%;
            object-fit: cover;
            max-height: 480px;
        }
        .feature-img figcaption {
            padding: 0.6rem 0.4rem 0.2rem;
            font-size: 0.9rem;
            color: var(--text-light);
            font-style: italic;
        }
        .form-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 1.8rem 2rem;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            margin: 2rem 0;
        }
        .form-card label {
            font-weight: 600;
            display: block;
            margin-bottom: 0.3rem;
            color: var(--primary);
        }
        .form-card input,
        .form-card textarea,
        .form-card select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1.5px solid #dde1e6;
            border-radius: 8px;
            font-family: var(--font);
            font-size: 1rem;
            transition: var(--transition);
            background: var(--bg);
            margin-bottom: 1rem;
        }
        .form-card input:focus,
        .form-card textarea:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px rgba(26, 60, 110, 0.1);
        }
        .form-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: var(--white);
            padding: 0.7rem 1.8rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font);
        }
        .btn:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(26, 60, 110, 0.2);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #1e2a3a;
        }
        .btn-secondary:hover {
            background: #e6951f;
            color: #1e2a3a;
        }
        .rating-stars {
            display: flex;
            gap: 0.4rem;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ddd;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }
        .rating-stars i {
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: var(--secondary);
            transform: scale(1.1);
        }
        .rating-stars i.selected {
            color: var(--secondary);
        }
        .comment-item {
            background: var(--accent);
            border-radius: var(--radius);
            padding: 1rem 1.4rem;
            margin-bottom: 1rem;
            border-left: 4px solid var(--secondary);
        }
        .comment-item .author {
            font-weight: 700;
            color: var(--primary);
        }
        .comment-item .date {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        footer {
            background: var(--primary);
            color: var(--white);
            padding: 2.5rem 0 1.2rem;
            margin-top: 3rem;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        footer a {
            color: #f5d794;
        }
        footer a:hover {
            color: var(--white);
        }
        .footer-inner {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
        }
        .footer-inner h4 {
            color: var(--secondary);
            margin-top: 0;
            font-weight: 700;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.4rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.9rem;
            color: #c5d5e8;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.4rem;
                padding: 1rem 0 0.4rem;
                border-top: 1px solid var(--accent);
                margin-top: 0.6rem;
            }
            .nav-list.open {
                display: flex;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .form-card {
                padding: 1.2rem;
            }
            .header-inner {
                gap: 0.4rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            body {
                padding: 0 0.6rem;
            }
        }
        @media (min-width: 769px) {
            .nav-list {
                display: flex !important;
            }
        }
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--accent);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }
        .schema-hidden {
            display: none;
        }