*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.75;
            padding: 0 16px;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.25s ease, border-bottom 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #004999;
            border-bottom: 2px solid #0066cc;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 10px;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            background: #ffffff;
            padding: 20px 28px 40px;
            border-radius: 20px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }
        .my-logo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #0b1a2e, #1d3b5c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            border-bottom: none !important;
        }
        .my-logo i {
            font-size: 2.1rem;
            color: #0066cc;
            -webkit-text-fill-color: #0066cc;
        }
        .my-logo:hover {
            border-bottom: none !important;
            opacity: 0.85;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            font-size: 0.85rem;
            padding: 12px 0 8px;
            color: #5a6a7a;
            border-bottom: 1px solid #e6edf4;
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: #0066cc;
            border-bottom: none;
        }
        .breadcrumb a:hover {
            border-bottom: 1px solid #0066cc;
        }
        .breadcrumb span {
            color: #2c3e50;
            font-weight: 500;
        }
        .navbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 8px 0 18px;
            position: relative;
        }
        .nav-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            list-style: none;
            padding: 0;
            margin: 0;
            transition: all 0.3s ease;
        }
        .nav-links li a {
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 4px;
            border-bottom: 2px solid transparent;
            transition: border-color 0.25s ease, color 0.25s ease;
            color: #1e2a3a;
        }
        .nav-links li a:hover {
            border-bottom-color: #0066cc;
            color: #0066cc;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: #1e2a3a;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef3f8;
        }
        #nav-toggle {
            display: none;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin: 0.4em 0 0.3em;
            color: #0a1a2b;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 1.8em 0 0.6em;
            padding-bottom: 6px;
            border-bottom: 3px solid #0066cc;
            color: #0f293f;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 1.5em 0 0.5em;
            color: #16354d;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 1.2em 0 0.3em;
            color: #1e425e;
        }
        p {
            margin: 0.75em 0 1.1em;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #2c4056;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #6f7e8e;
            background: #f0f4fa;
            display: inline-block;
            padding: 4px 16px;
            border-radius: 30px;
            margin-bottom: 12px;
        }
        .form-card {
            background: #f8fafd;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 1.8em 0;
            border: 1px solid #e2eaf2;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        }
        .form-card input,
        .form-card textarea,
        .form-card select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #d0dbe8;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            background: #ffffff;
        }
        .form-card input:focus,
        .form-card textarea:focus,
        .form-card select:focus {
            outline: none;
            border-color: #0066cc;
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
        }
        .form-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-card button {
            background: #0066cc;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 12px 32px;
            border: none;
            border-radius: 40px;
            cursor: pointer;
            transition: background 0.25s ease, transform 0.15s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .form-card button:hover {
            background: #004a99;
            transform: translateY(-2px);
        }
        .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-top: 6px;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 4px;
            font-size: 1.8rem;
            color: #ccd8e6;
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b300;
        }
        .feature-img {
            margin: 1.6em 0 1.2em;
            border-radius: 14px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .feature-img figcaption {
            font-size: 0.9rem;
            color: #5a6a7a;
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2em 0;
            border-radius: 12px;
            border: 1px solid #dfe8f0;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 480px;
        }
        .table-wrap th {
            background: #eaf0f7;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
            color: #0f293f;
        }
        .table-wrap td {
            padding: 10px 16px;
            border-top: 1px solid #e2eaf2;
        }
        .table-wrap tr:hover td {
            background: #f6faff;
        }
        blockquote {
            border-left: 5px solid #0066cc;
            background: #f2f7fe;
            padding: 16px 24px;
            margin: 1.4em 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #1e3a52;
        }
        .highlight-box {
            background: #eef5ff;
            border-radius: 14px;
            padding: 20px 24px;
            border: 1px solid #cde0f0;
            margin: 1.2em 0;
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 6px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .flex-center {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 16px;
        }
        footer {
            margin-top: 3rem;
            padding-top: 1.8rem;
            border-top: 2px solid #e6edf4;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            padding: 14px 0 10px;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #1e2a3a;
            font-weight: 500;
            border-bottom: 1px solid transparent;
        }
        friend-link a:hover {
            border-bottom-color: #0066cc;
            color: #0066cc;
        }
        .copyright {
            text-align: center;
            padding: 20px 0 8px;
            font-size: 0.88rem;
            color: #5f7285;
        }
        @media (max-width: 820px) {
            .container {
                padding: 16px 16px 32px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.55rem;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                border-radius: 14px;
                padding: 16px 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                border: 1px solid #e6edf4;
                margin-top: 10px;
            }
            .nav-links li a {
                padding: 10px 8px;
                display: block;
                border-bottom: 1px solid #f0f4fa;
            }
            .hamburger {
                display: block;
            }
            #nav-toggle:checked~.nav-links {
                display: flex;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px 12px 24px;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.65rem;
            }
            .form-card {
                padding: 16px 14px;
            }
            .breadcrumb {
                font-size: 0.75rem;
                gap: 4px 8px;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #0066cc;
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(0, 102, 204, 0.3);
            transition: transform 0.2s, background 0.25s;
            border: none;
            cursor: pointer;
            z-index: 99;
        }
        .scroll-top:hover {
            background: #004a99;
            transform: scale(1.05);
        }
        .schema-hidden {
            display: none;
        }