*,
        *::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, sans-serif;
            background: #f5faff;
            color: #1e2a3d;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1a6e8e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0a3c52;
            text-decoration: underline;
        }
        :root {
            --primary: #0f4b6e;
            --primary-light: #1a6e8e;
            --primary-dark: #072837;
            --accent: #2a9d8f;
            --accent-light: #3fc1b2;
            --bg-light: #f5faff;
            --bg-card: #ffffff;
            --text-dark: #1e2a3d;
            --text-muted: #4a5b6e;
            --border-light: #dce6f0;
            --shadow-sm: 0 2px 8px rgba(15, 75, 110, 0.08);
            --shadow-md: 0 4px 20px rgba(15, 75, 110, 0.12);
            --radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: #fff;
            padding: 0 0 4px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(7, 40, 55, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--accent-light);
            font-size: 1.6rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--accent-light);
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.7;
            display: block;
            letter-spacing: 0.5px;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: #e8f0fe;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .nav-list li a i {
            margin-right: 6px;
            font-size: 0.8rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .breadcrumb-wrap {
            background: #eaf2fa;
            padding: 10px 20px;
            font-size: 0.85rem;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-wrap .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb-wrap a {
            color: var(--primary-light);
        }
        .breadcrumb-wrap span {
            color: var(--text-muted);
        }
        .breadcrumb-wrap .sep {
            color: #b0c4d8;
            margin: 0 4px;
        }
        .hero {
            background: linear-gradient(145deg, #e5f0fa 0%, #d4e4f0 100%);
            padding: 40px 20px 36px;
            text-align: center;
            border-bottom: 3px solid var(--accent);
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0 auto 16px;
        }
        .hero .meta-badge {
            display: inline-flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .hero .meta-badge span {
            background: var(--bg-card);
            padding: 4px 16px;
            border-radius: 30px;
            box-shadow: var(--shadow-sm);
        }
        .hero .meta-badge i {
            color: var(--primary-light);
            margin-right: 6px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 36px;
            padding: 40px 0;
        }
        .main-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .widget {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .widget h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 6px;
        }
        .widget ul {
            list-style: none;
        }
        .widget ul li {
            padding: 6px 0;
            border-bottom: 1px solid #eef4f9;
        }
        .widget ul li:last-child {
            border-bottom: none;
        }
        .widget ul li a {
            font-size: 0.92rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .widget ul li a i {
            color: var(--accent);
            font-size: 0.75rem;
            width: 16px;
        }
        .main-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin: 36px 0 16px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
        .main-content h2 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .main-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--primary);
            margin: 28px 0 12px 0;
        }
        .main-content h3 i {
            color: var(--primary-light);
            margin-right: 8px;
            font-size: 1.1rem;
        }
        .main-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #1a4b62;
            margin: 20px 0 8px 0;
        }
        .main-content p {
            margin-bottom: 16px;
            font-size: 1rem;
            color: var(--text-dark);
        }
        .main-content strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .main-content ul,
        .main-content ol {
            margin: 0 0 18px 24px;
        }
        .main-content li {
            margin-bottom: 6px;
        }
        .main-content .highlight-box {
            background: #e9f3fa;
            border-left: 5px solid var(--accent);
            padding: 16px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
        }
        .main-content .highlight-box i {
            color: var(--accent);
            margin-right: 8px;
        }
        .main-content .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 12px;
            margin: 18px 0;
        }
        .main-content .stat-card {
            background: var(--bg-light);
            padding: 14px;
            border-radius: 8px;
            text-align: center;
            border: 1px solid var(--border-light);
        }
        .main-content .stat-card .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
        }
        .main-content .stat-card .label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .content-img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            margin: 24px 0;
            width: 100%;
        }
        .content-img-wrap {
            position: relative;
        }
        .content-img-wrap figcaption {
            font-size: 0.85rem;
            color: var(--text-muted);
            text-align: center;
            padding: 8px 0 0;
            font-style: italic;
        }
        .search-block {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 28px 0;
            border: 1px solid var(--border-light);
        }
        .search-block h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 10px 16px;
            border: 2px solid var(--border-light);
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input:focus {
            border-color: var(--primary-light);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 28px 0;
        }
        .feedback-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 20px 24px;
            border: 1px solid var(--border-light);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feedback-card input,
        .feedback-card textarea {
            padding: 10px 14px;
            border: 2px solid var(--border-light);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: var(--primary-light);
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 80px;
        }
        .feedback-card button {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
        }
        .feedback-card button:hover {
            background: #1f8a7a;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #d0d8e0;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars i {
            transition: color 0.2s;
        }
        .rating-stars i:hover,
        .rating-stars i:hover~i {
            color: #f4b942;
        }
        .rating-stars.active i {
            color: #f4b942;
        }
        friend-link {
            display: block;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            margin-top: 20px;
        }
        friend-link h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 6px;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            list-style: none;
        }
        friend-link .friend-list li a {
            font-size: 0.92rem;
            color: var(--primary-light);
        }
        friend-link .friend-list li a:hover {
            color: var(--primary-dark);
        }
        .site-footer {
            background: var(--primary-dark);
            color: #cbdae8;
            padding: 28px 20px 20px;
            margin-top: auto;
            text-align: center;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .site-footer a {
            color: var(--accent-light);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .site-footer .copyright {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .main-content {
                padding: 24px 20px;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary-dark);
                padding: 12px 0 16px;
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 2px;
            }
            .nav-list.show {
                display: flex;
            }
            .nav-list li a {
                display: block;
                padding: 10px 20px;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .main-content h2 {
                font-size: 1.4rem;
            }
            .main-content h3 {
                font-size: 1.15rem;
            }
            .main-content {
                padding: 18px 14px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero .meta-badge {
                flex-direction: column;
                gap: 8px;
            }
            .main-content h2 {
                font-size: 1.2rem;
            }
            .main-content .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feedback-card {
                padding: 16px;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary);
            color: #fff;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s, transform 0.3s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
        }