* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f4f7fb;
            color: #1a2a3a;
            line-height: 1.75;
            font-size: 18px;
        }
        a {
            color: #0066a0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #003d6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            background: linear-gradient(135deg, #0a2e4a 0%, #1a5f8a 100%);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: 1px;
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            padding: 6px 18px;
            border-radius: 40px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: 0.25s;
            display: inline-block;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            text-decoration: none;
            transform: scale(1.02);
        }
        .my-logo span {
            color: #ffd966;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 28px;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 6px;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .main-nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e0edf7;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: 0.2s;
            font-size: 16px;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 6px;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 14px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            body {
                font-size: 16px;
            }
        }
        .breadcrumb {
            background: #eaf0f6;
            padding: 12px 0;
            font-size: 14px;
            border-bottom: 1px solid #d0dde8;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #6a7f94;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2a5f7a;
        }
        .breadcrumb .current {
            color: #1a2a3a;
            font-weight: 600;
        }
        .content-wrapper {
            padding: 40px 0 60px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0a2e4a;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0f3e5c;
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid #d0e2f0;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1a4f6e;
            margin: 32px 0 12px;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #236080;
            margin: 24px 0 10px;
        }
        p {
            margin-bottom: 18px;
            color: #1e2e3e;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #2a4a5e;
            background: #e8f0f8;
            padding: 20px 28px;
            border-radius: 14px;
            border-left: 6px solid #1a5f8a;
            margin-bottom: 30px;
        }
        .highlight-box {
            background: #f0f6fc;
            border-radius: 12px;
            padding: 24px 28px;
            margin: 28px 0;
            border: 1px solid #c8dce8;
        }
        .highlight-box strong {
            color: #0a3a5a;
        }
        .btn {
            display: inline-block;
            background: #1a5f8a;
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 18px;
            border: none;
            cursor: pointer;
            transition: 0.25s;
        }
        .btn:hover {
            background: #0e3e5e;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 95, 138, 0.35);
            text-decoration: none;
            color: #fff;
        }
        .btn i {
            margin-right: 10px;
        }
        .feature-img {
            border-radius: 16px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            margin: 32px 0;
            width: 100%;
        }
        .link-list {
            background: #f4f9ff;
            border-radius: 14px;
            padding: 20px 26px;
            margin: 30px 0;
            border: 1px solid #cde0ee;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 10px 20px;
        }
        .link-list li a {
            padding: 6px 0;
            display: inline-block;
            font-weight: 500;
        }
        .link-list li a i {
            margin-right: 8px;
            color: #1a5f8a;
            font-size: 14px;
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 50px 0 30px;
        }
        .feedback-card {
            background: #fff;
            border-radius: 18px;
            padding: 28px 30px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2edf5;
        }
        .feedback-card h3 {
            margin-top: 0;
            border-bottom: 2px solid #e2edf5;
            padding-bottom: 12px;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 12px 16px;
            border: 1px solid #cbdae6;
            border-radius: 10px;
            font-size: 16px;
            font-family: inherit;
            background: #fafcfe;
            transition: 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            outline: none;
            border-color: #1a5f8a;
            box-shadow: 0 0 0 3px rgba(26, 95, 138, 0.15);
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .btn {
            align-self: flex-start;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 28px;
            color: #ccc;
            cursor: pointer;
            transition: 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        @media (max-width: 700px) {
            .user-feedback {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
        }
        .site-footer {
            background: #0a2a3e;
            color: #cddee8;
            padding: 40px 0 20px;
            font-size: 15px;
        }
        .site-footer a {
            color: #9bc1d9;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 30px 50px;
            margin-bottom: 30px;
        }
        .footer-col {
            flex: 1 1 200px;
        }
        .footer-col h4 {
            color: #dfecf3;
            margin-top: 0;
            margin-bottom: 14px;
            font-size: 18px;
            border-bottom: 1px solid #1f4a62;
            padding-bottom: 8px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 8px;
        }
        .footer-col li a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }
        friend-link {
            display: block;
            margin-top: 10px;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 6px;
            padding: 4px 10px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 20px;
            font-size: 14px;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.14);
            text-decoration: none;
        }
        .copyright {
            border-top: 1px solid #1f4a62;
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
            color: #8baec4;
        }
        .copyright strong {
            color: #c8dde8;
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .my-logo {
                font-size: 20px;
                padding: 4px 14px;
            }
            .feedback-card {
                padding: 18px 16px;
            }
        }
        .rules-table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 16px;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .rules-table th {
            background: #1a5f8a;
            color: #fff;
            padding: 14px 18px;
            text-align: left;
            font-weight: 600;
        }
        .rules-table td {
            padding: 12px 18px;
            border-bottom: 1px solid #e2edf5;
        }
        .rules-table tr:last-child td {
            border-bottom: none;
        }
        .rules-table tr:hover td {
            background: #f4f9ff;
        }
        .toc {
            background: #eef4fa;
            border-radius: 14px;
            padding: 22px 28px;
            margin: 28px 0;
            border: 1px solid #d0dde8;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            padding-left: 22px;
            columns: 2;
            column-gap: 40px;
        }
        .toc ol li {
            margin-bottom: 6px;
            break-inside: avoid;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }