*,
        *::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;
            line-height: 1.8;
            color: #1e2a3a;
            background: #f8fafc;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            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(135deg, #1a2a3a 0%, #2c3e50 100%);
            padding: 16px 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: 1.9rem;
            font-weight: 800;
            color: #f1c40f;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(241, 196, 15, 0.3);
            transition: transform 0.3s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #f1c40f;
        }
        .my-logo span {
            color: #ecf0f1;
            font-weight: 300;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #ecf0f1;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: background 0.3s ease, color 0.3s ease;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background: rgba(241, 196, 15, 0.18);
            color: #f1c40f;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
            padding: 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 28px;
            height: 3px;
            background: #ecf0f1;
            border-radius: 4px;
            transition: 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .breadcrumbs {
            background: #ecf0f1;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce1e6;
        }
        .breadcrumbs ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumbs li+li::before {
            content: "›";
            margin-right: 12px;
            color: #7f8c8d;
            font-weight: 700;
        }
        .breadcrumbs a {
            color: #2c3e50;
        }
        .breadcrumbs .current {
            color: #c0392b;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #ffffff 0%, #f2f6fa 100%);
            padding: 48px 0 32px;
            border-bottom: 1px solid #e6ecf2;
        }
        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: #1a2a3a;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            color: #5d6d7e;
            font-size: 0.95rem;
        }
        .hero .meta i {
            margin-right: 6px;
            color: #c0392b;
        }
        .hero .last-updated {
            background: #fef9e7;
            padding: 4px 14px;
            border-radius: 30px;
            font-weight: 500;
            color: #7d6608;
        }
        .content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body h2 {
            font-size: 2rem;
            margin-top: 48px;
            margin-bottom: 18px;
            color: #1a2a3a;
            border-bottom: 3px solid #f1c40f;
            padding-bottom: 8px;
            font-weight: 700;
        }
        .article-body h3 {
            font-size: 1.5rem;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #2c3e50;
            font-weight: 600;
        }
        .article-body h4 {
            font-size: 1.2rem;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #34495e;
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 20px;
            color: #2c3e50;
            font-size: 1.05rem;
            line-height: 1.9;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px 24px;
            line-height: 1.9;
        }
        .article-body li {
            margin-bottom: 8px;
            font-size: 1.02rem;
        }
        .article-body .highlight-box {
            background: #fef9e7;
            border-left: 5px solid #f1c40f;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .article-body .highlight-box p {
            margin-bottom: 0;
        }
        .article-body .emoji-big {
            font-size: 1.4rem;
            margin-right: 6px;
        }
        .article-body strong {
            color: #1a2a3a;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 12px 16px;
            background: #ecf0f1;
            font-size: 0.9rem;
            color: #5d6d7e;
            font-style: italic;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 28px;
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: #1a2a3a;
            border-bottom: 2px solid #f1c40f;
            padding-bottom: 8px;
        }
        .sidebar-link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-link-list li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f3f7;
        }
        .sidebar-link-list li:last-child {
            border-bottom: none;
        }
        .sidebar-link-list a {
            color: #2c3e50;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-link-list a:hover {
            color: #c0392b;
        }
        .sidebar-link-list i {
            color: #c0392b;
            font-size: 0.85rem;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            border: 1px solid #dce1e6;
            background: #fff;
            transition: box-shadow 0.3s ease;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.15);
            border-color: #c0392b;
        }
        .search-form input {
            flex: 1;
            padding: 12px 18px;
            border: none;
            font-size: 0.95rem;
            outline: none;
            background: transparent;
            color: #1a2a3a;
        }
        .search-form button {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 12px 20px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s ease;
        }
        .search-form button:hover {
            background: #a93226;
        }
        .feedback-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid #e6ecf2;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .feedback-card {
            background: #ffffff;
            padding: 28px;
            border-radius: 16px;
            border: 1px solid #eef2f6;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
        }
        .feedback-card h3 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: #1a2a3a;
            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: 1px solid #dce1e6;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.3s ease;
            background: #fafcfd;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #c0392b;
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.08);
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 100px;
        }
        .feedback-card .btn-submit {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 14px 24px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        .feedback-card .btn-submit:hover {
            background: #a93226;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #dce1e6;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .rating-stars .star.active {
            color: #f1c40f;
        }
        .rating-stars .star:hover,
        .rating-stars .star.hover {
            color: #f39c12;
        }
        .site-footer {
            background: #1a2a3a;
            color: #bdc3c7;
            padding: 40px 0 24px;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-inner h4 {
            color: #ecf0f1;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-inner p,
        .footer-inner li {
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .footer-inner ul {
            list-style: none;
            padding: 0;
        }
        .footer-inner ul li {
            margin-bottom: 8px;
        }
        .footer-inner a {
            color: #bdc3c7;
        }
        .footer-inner a:hover {
            color: #f1c40f;
            text-decoration: none;
        }
        friend-link {
            display: block;
            background: #2c3e50;
            padding: 24px 20px;
            border-radius: 12px;
            margin: 16px 0 24px;
            color: #ecf0f1;
        }
        friend-link h4 {
            color: #f1c40f;
            font-size: 1.1rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
        }
        friend-link .friend-list a {
            color: #d5dbdb;
            font-size: 0.92rem;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: border-color 0.3s ease, color 0.3s ease;
        }
        friend-link .friend-list a:hover {
            color: #f1c40f;
            border-bottom-color: #f1c40f;
            text-decoration: none;
        }
        .copyright {
            border-top: 1px solid #2c3e50;
            padding-top: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .copyright a {
            color: #ecf0f1;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 16px 0 8px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
                width: 100%;
                text-align: center;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .header-inner {
                gap: 8px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .breadcrumbs ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.25rem;
            }
            .article-body p {
                font-size: 0.98rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero .meta {
                font-size: 0.82rem;
                gap: 10px 16px;
            }
            .sidebar-card {
                padding: 16px;
            }
            .feedback-card {
                padding: 20px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .gap-8 {
            gap: 8px;
        }
        .rating-stars .star {
            user-select: none;
        }
        .rating-stars .star.active {
            color: #f1c40f;
        }