*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fc;
            color: #1a2634;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0f4c81;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e84045;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.4rem;
            margin: 0.8rem 0;
        }
        li {
            margin-bottom: 0.3rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.06);
            padding: 20px 24px 40px;
            margin-top: 16px;
            margin-bottom: 40px;
        }
        @media (min-width: 768px) {
            .container {
                padding: 32px 48px 60px;
                margin-top: 24px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 16px;
            border-bottom: 2px solid #eef2f7;
            position: relative;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0f4c81, #e84045);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a6a7a;
            background: none;
            color: #5a6a7a;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list {
            display: none;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 4px 18px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            font-weight: 500;
            font-size: 0.9rem;
            padding: 6px 0;
            color: #1a2634;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-list li a:hover {
            color: #e84045;
            border-bottom-color: #e84045;
            text-decoration: none;
        }
        .hamburger {
            background: none;
            border: none;
            font-size: 1.6rem;
            cursor: pointer;
            color: #1a2634;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f7;
        }
        .nav-list.active {
            display: flex;
            flex-direction: column;
            width: 100%;
            margin-top: 12px;
            padding: 16px 0 8px;
            border-top: 1px solid #eef2f7;
            background: #ffffff;
            gap: 6px;
        }
        .nav-list.active li a {
            display: block;
            padding: 8px 12px;
            border-radius: 8px;
        }
        .nav-list.active li a:hover {
            background: #f0f4fa;
        }
        @media (min-width: 768px) {
            .nav-list {
                display: flex !important;
                flex-direction: row;
                width: auto;
                border: none;
                padding: 0;
                margin: 0;
                background: transparent;
            }
            .hamburger {
                display: none !important;
            }
        }
        .breadcrumb {
            padding: 12px 0 6px;
            font-size: 0.82rem;
            color: #5a6a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 10px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #b0c0d0;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0f4c81;
        }
        .breadcrumb .current {
            color: #1a2634;
            font-weight: 500;
        }
        h1 {
            font-size: 2.0rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 20px 0 12px;
            color: #0a1929;
            letter-spacing: -0.3px;
        }
        h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 40px 0 14px;
            padding-bottom: 6px;
            border-bottom: 3px solid #eef2f7;
            color: #0f2a44;
        }
        h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 10px;
            color: #1a3a5a;
        }
        h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 20px 0 8px;
            color: #2a4a6a;
        }
        p {
            margin: 0 0 16px;
            color: #2a3a4a;
        }
        .last-updated {
            display: inline-block;
            background: #eef4fa;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.82rem;
            color: #2a5a7a;
            margin: 4px 0 18px;
            font-weight: 500;
        }
        .featured-img {
            margin: 24px 0 28px;
            border-radius: 16px;
            background: #eef2f7;
            padding: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .featured-img figcaption {
            font-size: 0.82rem;
            color: #5a6a7a;
            padding: 10px 4px 2px;
            text-align: center;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0 28px;
            border-radius: 12px;
            border: 1px solid #e6ecf3;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 520px;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e6ecf3;
        }
        th {
            background: #f0f5fb;
            font-weight: 600;
            color: #0f2a44;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8faff;
        }
        .form-card {
            background: #f8faff;
            border-radius: 16px;
            padding: 20px 20px 28px;
            margin: 32px 0 24px;
            border: 1px solid #e6ecf3;
        }
        .form-card label {
            display: block;
            font-weight: 600;
            margin: 16px 0 4px;
            color: #1a3a5a;
        }
        .form-card input,
        .form-card textarea,
        .form-card select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #d0dce8;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #ffffff;
            transition: 0.2s;
            font-family: inherit;
        }
        .form-card input:focus,
        .form-card textarea:focus {
            outline: none;
            border-color: #0f4c81;
            box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.12);
        }
        .form-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .form-card .btn {
            background: #0f4c81;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: 0.2s;
            margin-top: 12px;
            display: inline-block;
        }
        .form-card .btn:hover {
            background: #e84045;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 64, 69, 0.25);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #ffb347;
            cursor: pointer;
            margin: 6px 0 10px;
        }
        .rating-stars i {
            transition: transform 0.15s, color 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
            color: #ff9a00;
        }
        friend-link {
            display: block;
            padding: 24px 0 12px;
            border-top: 2px solid #eef2f7;
            margin-top: 40px;
        }
        friend-link .fl-head {
            font-weight: 700;
            font-size: 1.1rem;
            color: #1a3a5a;
            margin-bottom: 12px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 12px;
            background: #f0f5fb;
            border-radius: 40px;
            font-size: 0.88rem;
            transition: 0.2s;
        }
        friend-link a:hover {
            background: #e84045;
            color: #fff;
            text-decoration: none;
        }
        .site-footer {
            text-align: center;
            padding: 28px 0 12px;
            font-size: 0.84rem;
            color: #5a6a7a;
            border-top: 2px solid #eef2f7;
            margin-top: 30px;
        }
        .site-footer .copy {
            font-weight: 400;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .container {
                padding: 12px 14px 30px;
            }
            .form-card {
                padding: 16px 14px 22px;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 24px;
            right: 24px;
            background: #0f4c81;
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            transition: 0.2s;
            border: none;
            cursor: pointer;
            z-index: 99;
        }
        .scroll-top:hover {
            background: #e84045;
            transform: translateY(-4px);
        }
        .highlight-box {
            background: #f0f8ff;
            border-left: 4px solid #0f4c81;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .highlight-box strong {
            color: #0f4c81;
        }
        .emoji-big {
            font-size: 1.3rem;
            display: inline-block;
            margin-right: 4px;
        }
        .word-count-note {
            font-size: 0.82rem;
            color: #7a8a9a;
            text-align: right;
            border-top: 1px dashed #dce4ec;
            padding-top: 16px;
            margin-top: 32px;
        }
        .schema-hidden {
            display: none;
        }