*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f4f7fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
            color: #0f172a;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #3b82f6;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
            color: #fff;
            padding: 0.8rem 1.2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #fcd34d, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #f59e0b;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.4rem;
            padding: 0.4rem 0.7rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .navbar {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            flex-wrap: wrap;
        }
        .navbar a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            transition: background 0.2s, color 0.2s;
        }
        .navbar a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fcd34d;
            text-decoration: none;
        }
        .navbar a i {
            margin-right: 0.3rem;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.6rem 1.2rem;
            font-size: 0.85rem;
            color: #475569;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #94a3b8;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hero {
            background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
            padding: 2.5rem 1.2rem;
            border-radius: 0 0 40px 40px;
            margin-bottom: 2rem;
        }
        .hero h1 {
            font-size: 2.6rem;
            margin-top: 0;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem 2rem;
            margin-top: 1rem;
            color: #475569;
            font-size: 0.9rem;
        }
        .hero .meta i {
            margin-right: 0.4rem;
            color: #3b82f6;
        }
        .last-updated {
            font-weight: 600;
            color: #1e293b;
        }
        .search-section {
            margin: 1.8rem 0 2.5rem;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
            border-radius: 60px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #d1d9e6;
            background: #fff;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1.4rem;
            border: none;
            font-size: 1rem;
            outline: none;
            background: transparent;
        }
        .search-form button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0 1.8rem;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1e40af;
        }
        .toc {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin-bottom: 2.5rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #e2e8f0;
        }
        .toc h2 {
            font-size: 1.3rem;
            border-left: none;
            padding-left: 0;
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            columns: 2 240px;
            column-gap: 2rem;
        }
        .toc li {
            padding: 0.25rem 0;
            break-inside: avoid;
        }
        .toc a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #1e293b;
            font-weight: 500;
            padding: 0.3rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .toc a:hover {
            background: #eef2ff;
            text-decoration: none;
            color: #2563eb;
        }
        .toc a .num {
            color: #94a3b8;
            font-weight: 400;
            font-size: 0.8rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 2.5rem;
        }
        .main-article {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
        }
        .main-article .featured-image {
            border-radius: 16px;
            overflow: hidden;
            margin: 1.5rem 0 2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .main-article .featured-image img {
            width: 100%;
            object-fit: cover;
        }
        .main-article blockquote {
            border-left: 4px solid #3b82f6;
            background: #f8fafc;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #334155;
        }
        .main-article .highlight-box {
            background: #fef9e7;
            border: 1px solid #fde68a;
            border-radius: 12px;
            padding: 1.2rem 1.6rem;
            margin: 1.5rem 0;
        }
        .main-article .highlight-box i {
            color: #f59e0b;
            margin-right: 0.6rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 1.6rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
            font-size: 0.9rem;
        }
        .sidebar-card a i {
            margin-right: 0.4rem;
            color: #3b82f6;
            font-size: 0.8rem;
        }
        .interaction-area {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e2e8f0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .comment-box,
        .score-box {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e2e8f0;
        }
        .comment-box h3,
        .score-box h3 {
            margin-top: 0;
            font-size: 1.15rem;
        }
        .comment-box textarea,
        .score-box input,
        .score-box select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #d1d9e6;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            margin-bottom: 0.8rem;
            outline: none;
            transition: border 0.2s;
        }
        .comment-box textarea:focus,
        .score-box input:focus,
        .score-box select:focus {
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }
        .comment-box textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.65rem 1.6rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #1e40af;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1e293b;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d1d9e6;
            margin-bottom: 0.8rem;
            cursor: pointer;
        }
        .star-rating i.active {
            color: #f59e0b;
        }
        .star-rating i:hover,
        .star-rating i.hover {
            color: #fbbf24;
        }
        friend-link {
            display: block;
            background: #1e293b;
            color: #e2e8f0;
            padding: 1.8rem 1.2rem;
            border-radius: 16px 16px 0 0;
            margin-top: 3rem;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 2rem;
            justify-content: center;
        }
        friend-link a {
            color: #93c5fd;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        friend-link a:hover {
            color: #fcd34d;
            text-decoration: underline;
        }
        friend-link .label {
            font-weight: 700;
            color: #fcd34d;
            margin-right: 0.5rem;
        }
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 1.5rem 1.2rem;
            font-size: 0.85rem;
            border-top: 1px solid #1e3a5f;
        }
        .site-footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }
        .site-footer a {
            color: #93c5fd;
        }
        .site-footer a:hover {
            color: #fcd34d;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .toc ul {
                columns: 1;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 700px) {
            .nav-toggle {
                display: block;
            }
            .navbar {
                display: none;
                flex-direction: column;
                width: 100%;
                padding-top: 1rem;
                gap: 0.5rem;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 0.8rem;
            }
            .navbar.open {
                display: flex;
            }
            .navbar a {
                padding: 0.5rem 0.8rem;
                width: 100%;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .main-article {
                padding: 1.2rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .header-inner {
                gap: 0.5rem;
            }
        }
        @media (max-width: 480px) {
            .search-form button span {
                display: none;
            }
            .search-form button {
                padding: 0 1.2rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .schema-hidden {
            display: none;
        }