* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #0d3b66;
            --primary-light: #1a5276;
            --secondary: #2980b9;
            --accent: #f39c12;
            --accent-hover: #e67e22;
            --bg: #f4f7fb;
            --card-bg: #ffffff;
            --text: #1c2e3f;
            --text-light: #4a6a82;
            --border: #d0dee8;
            --shadow: 0 8px 24px rgba(13, 59, 102, 0.10);
            --radius: 12px;
            --font: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary) 0%, #0b2a44 100%);
            color: #fff;
            padding: 0 0 4px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 2rem;
        }
        .my-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: rgba(255, 255, 255, 0.7);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 8px;
            transition: transform var(--transition);
        }
        .hamburger:hover {
            transform: scale(1.1);
        }
        .hamburger.active {
            transform: rotate(90deg);
        }
        nav#main-nav ul {
            list-style: none;
            display: flex;
            gap: 6px;
            align-items: center;
            flex-wrap: wrap;
        }
        nav#main-nav ul li a {
            padding: 8px 16px;
            border-radius: 40px;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
        }
        nav#main-nav ul li a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        nav#main-nav ul li a.active {
            background: var(--accent);
            color: var(--primary);
        }
        @media(max-width:820px) {
            .hamburger {
                display: block;
            }
            nav#main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.45s ease, padding 0.3s ease;
                padding: 0 20px;
                background: rgba(0, 0, 0, 0.15);
                border-radius: 0 0 var(--radius) var(--radius);
            }
            nav#main-nav.open {
                max-height: 500px;
                padding: 16px 20px 20px;
            }
            nav#main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }
            nav#main-nav ul li a {
                display: block;
                padding: 10px 16px;
                border-radius: 8px;
            }
        }
        @media(max-width:480px) {
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo i {
                font-size: 1.5rem;
            }
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb-wrap .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 4px;
        }
        .breadcrumb-wrap a {
            color: var(--secondary);
        }
        .breadcrumb-wrap span {
            color: var(--text-light);
        }
        .breadcrumb-wrap .sep {
            margin: 0 4px;
            color: #aaa;
        }
        .hero {
            background: linear-gradient(135deg, #eaf4fc 0%, #d4e6f1 100%);
            padding: 48px 0 40px;
            text-align: center;
            border-bottom: 3px solid var(--secondary);
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .hero h1 i {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 720px;
            margin: 16px auto 0;
        }
        .hero .last-updated {
            display: inline-block;
            margin-top: 16px;
            background: var(--primary);
            color: #fff;
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        @media(max-width:600px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0 60px;
        }
        .main-content {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 36px;
            box-shadow: var(--shadow);
        }
        .main-content h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-top: 36px;
            margin-bottom: 16px;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 6px;
        }
        .main-content h2:first-child {
            margin-top: 0;
        }
        .main-content h3 {
            font-size: 1.5rem;
            color: var(--primary-light);
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .main-content h4 {
            font-size: 1.15rem;
            color: var(--text);
            margin-top: 22px;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .main-content p {
            margin-bottom: 18px;
            color: var(--text);
        }
        .main-content ul,
        .main-content ol {
            margin: 12px 0 20px 24px;
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .main-content .highlight-box {
            background: #eef7fb;
            border-left: 5px solid var(--secondary);
            padding: 20px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 24px 0;
        }
        .main-content .highlight-box strong {
            color: var(--primary);
        }
        .main-content .insight {
            background: #fef9e7;
            border-left: 5px solid var(--accent);
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
            font-style: italic;
        }
        .featured-image-wrap {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }
        .featured-image-wrap figcaption {
            background: var(--primary);
            color: #fff;
            padding: 10px 18px;
            font-size: 0.9rem;
            text-align: center;
        }
        @media(max-width:820px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 24px 0 40px;
            }
            .main-content {
                padding: 20px 18px;
            }
            .main-content h2 {
                font-size: 1.6rem;
            }
            .main-content h3 {
                font-size: 1.25rem;
            }
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 6px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }
        .sidebar-card ul li a i {
            color: var(--accent);
            width: 18px;
        }
        @media(max-width:820px) {
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }
        @media(max-width:540px) {
            .sidebar {
                grid-template-columns: 1fr;
            }
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
            padding: 32px 0 48px;
        }
        .interaction-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 22px;
            box-shadow: var(--shadow);
        }
        .interaction-card h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interaction-card h3 i {
            color: var(--accent);
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-family: var(--font);
            font-size: 0.95rem;
            transition: border var(--transition);
            resize: vertical;
            background: #fff;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: var(--secondary);
            outline: none;
        }
        .interaction-card textarea {
            min-height: 80px;
        }
        .interaction-card .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 40px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background var(--transition), transform 0.15s;
        }
        .interaction-card .btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .interaction-card .btn:active {
            transform: translateY(0);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color var(--transition), transform 0.15s;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: var(--accent);
            transform: scale(1.1);
        }
        @media(max-width:820px) {
            .interaction-area {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media(max-width:540px) {
            .interaction-area {
                grid-template-columns: 1fr;
            }
        }
        friend-link {
            display: block;
            background: var(--primary);
            color: #fff;
            padding: 28px 20px;
            text-align: center;
            border-top: 4px solid var(--accent);
        }
        friend-link .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        friend-link h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: var(--accent);
        }
        friend-link .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px 24px;
        }
        friend-link .friend-links-list a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            transition: color var(--transition);
        }
        friend-link .friend-links-list a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        footer {
            background: #061e30;
            color: rgba(255, 255, 255, 0.7);
            padding: 24px 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        footer .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        footer a {
            color: var(--accent);
        }
        footer a:hover {
            color: #fff;
        }
        footer .copyright {
            margin-top: 8px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.82rem;
        }
        @media(max-width:480px) {
            .main-content {
                padding: 16px 14px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .sidebar-card {
                padding: 16px;
            }
            .interaction-card {
                padding: 16px;
            }
        }
        @media print {
            header,
            .breadcrumb-wrap,
            .interaction-area,
            friend-link,
            footer {
                display: none;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
            .hero {
                padding: 20px 0;
            }
        }