* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f4f7fc;
            color: #1a2639;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e74c3c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(145deg, #0b1a2e, #1a2f44);
            color: #fff;
            padding: 14px 0;
            border-bottom: 4px solid #f1c40f;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 2px;
            background: linear-gradient(135deg, #f1c40f, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #f1c40f;
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #f1c40f;
            color: #f1c40f;
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            background: #f1c40f;
            color: #0b1a2e;
        }
        .main-nav {
            display: flex;
            gap: 10px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 6px 12px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            background: #f1c40f;
            color: #0b1a2e;
            text-decoration: none;
        }
        .breadcrumb {
            background: #fff;
            padding: 12px 0;
            border-bottom: 1px solid #dce1e8;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: #7f8c8d;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #2c3e50;
        }
        .breadcrumb .current {
            color: #c0392b;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #0f2b3d, #1c3e57);
            color: #fff;
            padding: 50px 0 40px;
            text-align: center;
            border-bottom: 6px solid #f1c40f;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 16px;
            text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .hero h1 span {
            color: #f1c40f;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 780px;
            margin: 0 auto 20px;
            opacity: 0.92;
        }
        .hero-meta {
            font-size: 0.95rem;
            color: #bdc3c7;
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
        }
        .hero-meta i {
            margin-right: 6px;
            color: #f1c40f;
        }
        .layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 900px) {
            .layout {
                grid-template-columns: 1fr;
            }
        }
        .main-content h2 {
            font-size: 2rem;
            color: #0b1a2e;
            border-left: 6px solid #f1c40f;
            padding-left: 18px;
            margin: 40px 0 20px;
        }
        .main-content h3 {
            font-size: 1.5rem;
            color: #1a2f44;
            margin: 30px 0 14px;
            padding-bottom: 4px;
            border-bottom: 2px dashed #dce1e8;
        }
        .main-content h4 {
            font-size: 1.2rem;
            color: #2c3e50;
            margin: 22px 0 10px;
            font-weight: 700;
        }
        .main-content p {
            margin-bottom: 18px;
            color: #2c3e50;
        }
        .main-content ul,
        .main-content ol {
            margin: 0 0 20px 24px;
            color: #2c3e50;
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .highlight-box {
            background: #eaf4ff;
            border-left: 6px solid #f1c40f;
            padding: 20px 26px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #c0392b;
        }
        .insight-badge {
            display: inline-block;
            background: #c0392b;
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: #fff;
            padding: 22px 16px;
            border-radius: 16px;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
            text-align: center;
            border: 1px solid #e8edf4;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #c0392b;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: #5d6d7e;
            margin-top: 4px;
        }
        .featured-image {
            margin: 30px 0;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            background: #fff;
            padding: 8px;
        }
        .featured-image img {
            border-radius: 14px;
            width: 100%;
        }
        .featured-image figcaption {
            padding: 12px 16px 6px;
            font-size: 0.9rem;
            color: #5d6d7e;
            text-align: center;
            font-style: italic;
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 18px;
            margin: 20px 0;
            padding: 16px 20px;
            background: #f0f4fa;
            border-radius: 14px;
        }
        .link-list-inline a {
            font-weight: 600;
            color: #1a2f44;
        }
        .link-list-inline a:hover {
            color: #c0392b;
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 24px 20px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.04);
            border: 1px solid #e8edf4;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            color: #0b1a2e;
            border-bottom: 3px solid #f1c40f;
            padding-bottom: 10px;
            margin-bottom: 18px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 10px;
            border-bottom: 1px solid #f0f2f5;
            padding-bottom: 10px;
        }
        .sidebar li a {
            font-weight: 600;
            color: #1a2f44;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar li a:hover {
            color: #c0392b;
        }
        .sidebar li a i {
            color: #f1c40f;
            width: 20px;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 20px 0 30px;
            background: #fff;
            padding: 4px;
            border-radius: 50px;
            border: 2px solid #dce1e8;
            transition: 0.2s;
        }
        .search-form:focus-within {
            border-color: #f1c40f;
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            font-size: 1rem;
            border-radius: 50px;
            outline: none;
            background: transparent;
        }
        .search-form button {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #e74c3c;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 40px 0;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #fff;
            padding: 24px 26px;
            border-radius: 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #e8edf4;
        }
        .feedback-card h3 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: #0b1a2e;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-card h3 i {
            color: #f1c40f;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 12px 16px;
            border: 2px solid #dce1e8;
            border-radius: 12px;
            font-size: 1rem;
            outline: none;
            transition: 0.2s;
            font-family: inherit;
            background: #fafcff;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #f1c40f;
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .star-select {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #dce1e8;
            cursor: pointer;
        }
        .feedback-card .star-select i.active {
            color: #f1c40f;
        }
        .feedback-card .star-select i:hover,
        .feedback-card .star-select i.hover {
            color: #f1c40f;
        }
        .feedback-card .btn {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 14px 24px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .feedback-card .btn:hover {
            background: #e74c3c;
        }
        .site-footer {
            background: #0b1a2e;
            color: #bdc3c7;
            padding: 40px 0 20px;
            border-top: 4px solid #f1c40f;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        @media (max-width: 700px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-grid h4 {
            color: #f1c40f;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-grid a {
            color: #bdc3c7;
            display: block;
            margin-bottom: 6px;
        }
        .footer-grid a:hover {
            color: #f1c40f;
        }
        .friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            padding: 16px 0;
            border-top: 1px solid #1a2f44;
            border-bottom: 1px solid #1a2f44;
            margin-bottom: 20px;
        }
        .friend-link a {
            color: #ecf0f1;
            font-weight: 500;
        }
        .friend-link a:hover {
            color: #f1c40f;
        }
        .copyright {
            text-align: center;
            font-size: 0.9rem;
            color: #7f8c8d;
            padding-top: 20px;
        }
        .copyright strong {
            color: #ecf0f1;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 16px;
                gap: 6px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 16px;
                background: rgba(255, 255, 255, 0.04);
                border-radius: 8px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .my-logo {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #c0392b;
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
            transition: 0.2s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .back-to-top:hover {
            background: #e74c3c;
            transform: translateY(-4px);
        }
        @media (max-width: 600px) {
            .back-to-top {
                bottom: 16px;
                right: 16px;
                width: 42px;
                height: 42px;
                font-size: 1.2rem;
            }
        }