* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f9ff;
            color: #1a2639;
            line-height: 1.7;
            font-size: 1.05rem;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #004999;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 14px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2b5e 0%, #1a4a8a 50%, #2e6bc4 100%);
            color: #fff;
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
            padding: 6px 20px;
            border-radius: 40px;
            transition: background 0.3s ease;
            display: inline-block;
            text-decoration: none;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.22);
            text-decoration: none;
            color: #ffe783;
        }
        .my-logo i {
            margin-right: 8px;
            color: #ffdd57;
        }
        .nav-list {
            display: flex;
            gap: 10px;
            list-style: none;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list a {
            color: #f0f6ff;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            display: inline-block;
        }
        .nav-list a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #ffe783;
            text-decoration: none;
            transform: translateY(-1px);
        }
        .nav-list a i {
            margin-right: 6px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.9rem;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .nav-mobile {
            display: none;
            width: 100%;
            margin-top: 12px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 12px 8px;
        }
        .nav-mobile.open {
            display: block;
        }
        .nav-mobile .nav-list {
            flex-direction: column;
            align-items: stretch;
        }
        .nav-mobile .nav-list a {
            display: block;
            padding: 12px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .breadcrumb {
            background: #e9f0fa;
            padding: 10px 0;
            font-size: 0.9rem;
            color: #3a4a6b;
            border-bottom: 1px solid #d0dcec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #7a8aa8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2a4a7a;
        }
        .breadcrumb .current {
            color: #0b2b5e;
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .article-body h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #0b2b5e;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-body h1 i {
            color: #f5a623;
        }
        .last-updated {
            display: inline-block;
            background: #eef4fb;
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2a4a7a;
            margin-bottom: 28px;
            border: 1px solid #d0dcec;
        }
        .last-updated i {
            margin-right: 6px;
        }
        .article-body h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0f3460;
            margin-top: 52px;
            margin-bottom: 16px;
            padding-bottom: 6px;
            border-bottom: 3px solid #e0eaff;
        }
        .article-body h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1a4a7a;
            margin-top: 36px;
            margin-bottom: 12px;
        }
        .article-body h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2a5a8a;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 18px;
            max-width: 850px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 22px;
            padding-left: 28px;
            max-width: 830px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .highlight-box {
            background: #e9f2fc;
            border-left: 5px solid #2e6bc4;
            padding: 20px 28px;
            border-radius: 12px;
            margin: 28px 0;
            max-width: 850px;
        }
        .highlight-box i {
            color: #2e6bc4;
            margin-right: 8px;
        }
        .feature-img {
            margin: 32px 0;
            border-radius: 16px;
            max-width: 900px;
        }
        .search-section {
            background: #e9f0fa;
            padding: 28px 32px;
            border-radius: 20px;
            margin: 48px 0 28px;
            max-width: 900px;
        }
        .search-section h3 {
            margin-top: 0;
            color: #0b2b5e;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #cdddec;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s ease;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #2e6bc4;
            box-shadow: 0 0 0 4px rgba(46, 107, 196, 0.15);
        }
        .search-form button {
            background: #0b2b5e;
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #1a4a8a;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin: 48px 0 30px;
            max-width: 900px;
        }
        @media (max-width:700px) {
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .rating-box {
            background: #ffffff;
            padding: 24px 28px;
            border-radius: 20px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e4ecf8;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
            font-size: 1.4rem;
            color: #0b2b5e;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #dde6f2;
            border-radius: 14px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border 0.3s;
            background: #fafcff;
        }
        .comment-form textarea:focus {
            border-color: #2e6bc4;
            box-shadow: 0 0 0 4px rgba(46, 107, 196, 0.1);
        }
        .comment-form input[type="text"] {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #dde6f2;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            margin-top: 10px;
            background: #fafcff;
        }
        .comment-form input[type="text"]:focus {
            border-color: #2e6bc4;
        }
        .comment-form .btn-submit {
            background: #0b2b5e;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            margin-top: 12px;
            transition: background 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .comment-form .btn-submit:hover {
            background: #1a4a8a;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 6px;
            margin: 12px 0 16px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2.2rem;
            color: #cbd5e6;
            cursor: pointer;
            transition: color 0.2s ease, transform 0.15s ease;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5a623;
            transform: scale(1.05);
        }
        .rating-box .btn-submit {
            background: #0b2b5e;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .rating-box .btn-submit:hover {
            background: #1a4a8a;
        }
        .related-links {
            background: #f0f6fe;
            padding: 24px 28px;
            border-radius: 16px;
            margin: 32px 0;
            max-width: 850px;
            border: 1px solid #d0dcec;
        }
        .related-links h4 {
            margin-top: 0;
            color: #0b2b5e;
        }
        .related-links ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px 20px;
        }
        @media (max-width:550px) {
            .related-links ul {
                grid-template-columns: 1fr;
            }
        }
        .related-links li {
            margin-bottom: 4px;
        }
        .related-links a {
            padding: 4px 0;
            display: inline-block;
            font-weight: 500;
        }
        .related-links a i {
            margin-right: 6px;
            color: #2e6bc4;
            font-size: 0.85rem;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c8d8f0;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }
        @media (max-width:600px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-inner a {
            color: #9ab4df;
        }
        .footer-inner a:hover {
            color: #ffe783;
        }
        friend-link {
            display: block;
            margin-top: 8px;
            padding: 8px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a {
            display: inline-block;
            padding: 4px 0;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 28px;
            margin-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            color: #7a94b8;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .copyright i {
            margin: 0 4px;
        }
        @media (max-width: 820px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: inline-block;
            }
            .article-body h1 {
                font-size: 2rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.5rem;
                padding: 4px 14px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
        }
        @media (min-width:821px) {
            .nav-mobile {
                display: none !important;
            }
        }
        .text-muted {
            color: #4a6a8a;
        }
        .mt-2 {
            margin-top: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .fa-lg {
            font-size: 1.2em;
        }