*,
        *::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 Neue', Arial, sans-serif;
            background: #f4f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.8rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b0e1a 0%, #1a2744 100%);
            color: #fff;
            padding: 16px 0;
            border-bottom: 3px solid #ff6b35;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
            color: #ff6b35;
        }
        .my-logo i {
            color: #ff6b35;
            font-size: 2rem;
        }
        .my-logo span {
            font-weight: 300;
            color: #9bb7e0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #dce6f5;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: all 0.25s;
        }
        .main-nav a:hover {
            color: #ff6b35;
            border-bottom-color: #ff6b35;
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            transition: transform 0.2s;
        }
        .hamburger:hover {
            transform: scale(1.1);
        }
        .nav-overlay {
            display: none;
        }
        .breadcrumb {
            background: #e9edf4;
            padding: 10px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d7e2;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: #2c3e50;
        }
        .breadcrumb a:hover {
            color: #ff6b35;
        }
        .breadcrumb .sep {
            color: #7f8c9b;
            margin: 0 4px;
        }
        .breadcrumb .current {
            color: #1a1a2e;
            font-weight: 600;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 40px;
            padding: 4px 4px 4px 16px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background 0.3s;
            max-width: 280px;
        }
        .search-form:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .search-form input[type="text"] {
            background: transparent;
            border: none;
            color: #fff;
            padding: 8px 0;
            font-size: 0.9rem;
            outline: none;
            flex: 1;
            min-width: 100px;
        }
        .search-form input[type="text"]::placeholder {
            color: #aab9d6;
        }
        .search-form button {
            background: #ff6b35;
            border: none;
            color: #fff;
            border-radius: 40px;
            padding: 8px 18px;
            font-size: 0.85rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
        }
        .search-form button:hover {
            background: #e85d2a;
            transform: scale(0.97);
        }
        .hero {
            background: linear-gradient(145deg, #0f1a2e, #1d3557);
            color: #fff;
            padding: 48px 0 40px;
            margin-bottom: 32px;
            border-bottom: 4px solid #ff6b35;
        }
        .hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: #ff6b35;
        }
        .hero p {
            font-size: 1.15rem;
            color: #cbd9f0;
            margin-bottom: 20px;
            max-width: 520px;
        }
        .hero .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #ff6b35;
            color: #fff;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: background 0.25s, transform 0.15s;
            border: none;
            cursor: pointer;
        }
        .hero .btn:hover {
            background: #e55d2b;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .hero .btn-outline {
            background: transparent;
            border: 2px solid #fff;
            color: #fff;
        }
        .hero .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #ff6b35;
        }
        .hero-img {
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            width: 100%;
            height: auto;
            object-fit: cover;
            border: 2px solid rgba(255, 107, 53, 0.3);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 2.5fr 1fr;
            gap: 40px;
            padding: 20px 0 40px;
        }
        .content-area {
            background: #fff;
            border-radius: 20px;
            padding: 36px 40px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 28px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .content-area h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 2.4rem;
            margin-bottom: 1rem;
            color: #0b1a2e;
            border-left: 5px solid #ff6b35;
            padding-left: 16px;
        }
        .content-area h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: #1d3557;
        }
        .content-area h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 1.6rem;
            margin-bottom: 0.6rem;
            color: #2c3e50;
        }
        .content-area p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #2c3e50;
        }
        .content-area .highlight {
            background: #fef6ee;
            border-left: 4px solid #ff6b35;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .content-area .highlight strong {
            color: #1a1a2e;
        }
        .content-area ul li,
        .content-area ol li {
            font-size: 1.05rem;
        }
        .content-area .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 1.6rem 0;
        }
        .content-area .stat-card {
            background: #f0f4fb;
            border-radius: 14px;
            padding: 18px 16px;
            text-align: center;
            border: 1px solid #e0e7f0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .content-area .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
        }
        .content-area .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ff6b35;
            display: block;
        }
        .content-area .stat-card .label {
            font-size: 0.95rem;
            color: #4a5a72;
        }
        .content-area .feature-img {
            border-radius: 16px;
            margin: 1.8rem 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            width: 100%;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: #0b1a2e;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 8px;
        }
        .sidebar .link-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.8rem 0;
        }
        .sidebar .link-list li {
            padding: 8px 0;
            border-bottom: 1px solid #edf0f5;
            margin: 0;
        }
        .sidebar .link-list li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar .link-list li a i {
            color: #ff6b35;
            font-size: 0.8rem;
        }
        .feedback-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e9edf4;
        }
        .feedback-section h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 1.6rem;
            color: #0b1a2e;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .feedback-card {
            background: #f8fafd;
            border-radius: 16px;
            padding: 24px;
            border: 1px solid #e6ecf5;
        }
        .feedback-card h4 {
            font-size: 1.15rem;
            margin-bottom: 1rem;
            color: #1d3557;
        }
        .feedback-card label {
            font-weight: 600;
            font-size: 0.95rem;
            display: block;
            margin-bottom: 4px;
            color: #2c3e50;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            width: 100%;
            padding: 10px 14px;
            border-radius: 10px;
            border: 1px solid #d0d7e2;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
            margin-bottom: 12px;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #ff6b35;
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: #ff6b35;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card .btn-submit:hover {
            background: #e55d2b;
            transform: scale(0.98);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin-bottom: 12px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #d0d7e2;
            cursor: pointer;
            transition: color 0.2s;
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: "\f005";
        }
        .star-rating label::before {
            content: "\f005";
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f9b826;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #6a7a8e;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #e9edf4;
        }
        .site-footer {
            background: #0b0e1a;
            color: #cbd9f0;
            padding: 40px 0 20px;
            margin-top: 40px;
            border-top: 3px solid #ff6b35;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1.15rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        .site-footer a {
            color: #9bb7e0;
        }
        .site-footer a:hover {
            color: #ff6b35;
        }
        .site-footer .friend-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .friend-links li {
            padding: 4px 0;
        }
        .copyright {
            border-top: 1px solid #1d2744;
            padding-top: 18px;
            text-align: center;
            font-size: 0.9rem;
            color: #6a7a8e;
        }
        .copyright strong {
            color: #cbd9f0;
        }
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero .btn-group {
                justify-content: center;
            }
            .hero-img {
                max-width: 600px;
                margin: 0 auto;
            }
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-basis: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 8px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 12px;
                border-radius: 8px;
                border-bottom: none;
                background: rgba(255, 255, 255, 0.04);
            }
            .main-nav a:hover {
                background: rgba(255, 107, 53, 0.15);
                border-bottom: none;
            }
            .search-form {
                max-width: 100%;
                margin-top: 8px;
                flex: 1;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .content-area {
                padding: 24px 18px;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .breadcrumb .container {
                font-size: 0.8rem;
            }
            .sidebar .link-list {
                columns: 2;
                column-gap: 20px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .content-area h2 {
                font-size: 1.5rem;
            }
            .content-area h3 {
                font-size: 1.25rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .sidebar .link-list {
                columns: 1;
            }
        }
        .text-muted {
            color: #6a7a8e;
        }
        .mt-2 {
            margin-top: 1.2rem;
        }
        .mb-1 {
            margin-bottom: 0.6rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }