*,
        *::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, Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fc;
            color: #1e1e2a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            text-decoration: none;
            color: #2a6df4;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #1a4bb0;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0e1a2b;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.2rem;
        }
        h2 {
            font-size: 1.9rem;
            border-left: 5px solid #f7a01c;
            padding-left: 0.9rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        strong,
        b {
            font-weight: 700;
            color: #0b1b2e;
        }
        hr {
            border: none;
            border-top: 2px dashed #d0d8e8;
            margin: 2.2rem 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 20px 28px 40px;
            margin-top: 16px;
            margin-bottom: 40px;
        }
        @media (max-width:600px) {
            .container {
                padding: 12px 14px 30px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 10px;
            border-bottom: 2px solid #eef2f9;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #f7a01c, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #e67e22;
            font-size: 1.7rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-links {
            display: flex;
            gap: 6px 18px;
            list-style: none;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .nav-links li a {
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 10px;
            border-radius: 40px;
            transition: background 0.2s, color 0.2s;
            color: #2c3e50;
        }
        .nav-links li a:hover {
            background: #eef2f9;
            color: #1a4bb0;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e1e2a;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f9;
        }
        @media (max-width:780px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                padding: 14px 10px 18px;
                border-radius: 16px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
                margin-top: 12px;
                border: 1px solid #eef2f9;
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links li a {
                padding: 10px 14px;
                font-size: 1rem;
            }
            .nav-bar {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 12px 0 6px;
            margin: 0 0 10px 0;
            font-size: 0.85rem;
            color: #5e6f8d;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 10px;
            color: #a0b0c9;
        }
        .breadcrumb a {
            color: #2a6df4;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #1e1e2a;
            font-weight: 500;
        }
        .search-section {
            background: #f0f4fe;
            border-radius: 20px;
            padding: 28px 24px;
            margin: 24px 0 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .search-form {
            display: flex;
            flex: 2 1 300px;
            border-radius: 60px;
            overflow: hidden;
            background: #fff;
            border: 1px solid #d5dfef;
            transition: box-shadow 0.2s;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.2);
            border-color: #2a6df4;
        }
        .search-form input {
            flex: 1;
            padding: 14px 20px;
            border: none;
            font-size: 1rem;
            outline: none;
            background: transparent;
            min-width: 0;
        }
        .search-form button {
            background: #2a6df4;
            border: none;
            color: #fff;
            padding: 0 28px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #1a4bb0;
        }
        .search-tip {
            font-size: 0.9rem;
            color: #3b4a66;
        }
        @media (max-width:500px) {
            .search-section {
                padding: 18px 14px;
            }
            .search-form input {
                padding: 10px 14px;
                font-size: 0.9rem;
            }
            .search-form button {
                padding: 0 16px;
                font-size: 0.95rem;
            }
        }
        .featured-img {
            margin: 28px 0 30px;
            border-radius: 18px;
            overflow: hidden;
            background: #eef2f9;
            text-align: center;
        }
        .featured-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img figcaption {
            padding: 8px 14px;
            font-size: 0.85rem;
            color: #3b4a66;
            background: #f8faff;
        }
        .sens-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0 28px;
            font-size: 0.95rem;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .sens-table th {
            background: #0e1a2b;
            color: #fff;
            padding: 14px 12px;
            text-align: left;
            font-weight: 600;
        }
        .sens-table td {
            padding: 12px;
            border-bottom: 1px solid #eef2f9;
            background: #fff;
        }
        .sens-table tr:last-child td {
            border-bottom: none;
        }
        .sens-table tr:hover td {
            background: #f6f9ff;
        }
        @media (max-width:600px) {
            .sens-table {
                font-size: 0.8rem;
            }
            .sens-table th,
            .sens-table td {
                padding: 8px 6px;
            }
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 40px 0 20px;
        }
        @media (max-width:700px) {
            .interaction-area {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #fafcff;
            border-radius: 20px;
            padding: 24px 22px;
            border: 1px solid #eef2f9;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
        }
        .card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 12px;
        }
        .card form input,
        .card form textarea,
        .card form select {
            padding: 12px 16px;
            border-radius: 12px;
            border: 1px solid #d5dfef;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
        }
        .card form input:focus,
        .card form textarea:focus,
        .card form select:focus {
            border-color: #2a6df4;
            outline: none;
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.12);
        }
        .card form textarea {
            min-height: 80px;
            resize: vertical;
        }
        .card form button {
            background: #2a6df4;
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .card form button:hover {
            background: #1a4bb0;
            transform: scale(1.01);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.8rem;
            color: #d5dfef;
            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: #f7a01c;
        }
        friend-link {
            display: block;
            padding: 24px 0 10px;
            border-top: 2px solid #eef2f9;
            margin-top: 32px;
        }
        friend-link .fl-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: #0e1a2b;
        }
        friend-link .fl-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 24px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        friend-link .fl-list li a {
            font-size: 0.9rem;
            color: #2a6df4;
        }
        friend-link .fl-list li a:hover {
            text-decoration: underline;
        }
        .site-footer {
            margin-top: 28px;
            padding: 20px 0 10px;
            border-top: 1px solid #eef2f9;
            font-size: 0.85rem;
            color: #5e6f8d;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .site-footer .copyright {
            font-weight: 400;
        }
        .site-footer .copyright strong {
            color: #0e1a2b;
        }
        .badge {
            display: inline-block;
            background: #f7a01c;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 40px;
            letter-spacing: 0.3px;
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #f0f4fe;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #1e2b44;
            margin-bottom: 16px;
        }
        .pro-tip {
            background: #fef9ee;
            border-left: 4px solid #f7a01c;
            padding: 16px 20px;
            border-radius: 12px;
            margin: 20px 0;
        }
        .pro-tip strong {
            color: #b45f06;
        }
        .glossary-term {
            font-weight: 600;
            color: #1a4bb0;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 20px 0;
        }
        @media (max-width:600px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #eef2f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #b8c6dd;
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #9aaccc;
        }