*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fb;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #facc15;
            text-shadow: 0 2px 8px rgba(250, 204, 21, 0.3);
            transition: transform 0.2s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #fde047;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 0.4rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #e9edf4;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #64748b;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #3b82f6;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 600;
        }
        main {
            padding: 2.2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: #fff;
            border-radius: 20px;
            padding: 2.2rem 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        @media (max-width: 600px) {
            article {
                padding: 1.5rem 1.2rem;
            }
        }
        article h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.6rem;
            color: #0f172a;
            letter-spacing: -0.5px;
        }
        article h1 i {
            color: #facc15;
            margin-right: 0.5rem;
        }
        article h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            color: #0f172a;
            border-left: 5px solid #facc15;
            padding-left: 1rem;
        }
        article h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: #1e293b;
        }
        article h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 1.4rem;
            margin-bottom: 0.5rem;
            color: #334155;
        }
        article p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #1e293b;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 1.8rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .meta-info i {
            margin-right: 0.3rem;
        }
        .last-updated {
            font-weight: 600;
            color: #475569;
        }
        .featured-image {
            margin: 1.8rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.6rem 1rem;
            background: #f1f5f9;
            font-size: 0.85rem;
            color: #475569;
            font-style: italic;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: #0f172a;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            padding: 0.3rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card li a {
            color: #2563eb;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .sidebar-card li a:hover {
            color: #1e40af;
        }
        .search-box {
            display: flex;
            gap: 0.4rem;
            margin-bottom: 0.2rem;
        }
        .search-box input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-box input:focus {
            border-color: #facc15;
        }
        .search-box button {
            padding: 0.7rem 1.2rem;
            background: #0f172a;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .search-box button:hover {
            background: #1e293b;
        }
        .feedback-section {
            margin-top: 2.5rem;
            padding-top: 1.8rem;
            border-top: 2px dashed #d1d9e6;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem 1.5rem 1.8rem;
            border: 1px solid #e2e8f0;
        }
        .feedback-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #0f172a;
        }
        .feedback-card label {
            font-weight: 600;
            font-size: 0.9rem;
            display: block;
            margin-bottom: 0.2rem;
            color: #334155;
        }
        .feedback-card input,
        .feedback-card textarea {
            width: 100%;
            padding: 0.7rem 0.9rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            margin-bottom: 0.8rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: #facc15;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: #facc15;
            color: #0f172a;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 10px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .feedback-card .btn-submit:hover {
            background: #fde047;
            transform: scale(1.02);
        }
        .stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d1d9e6;
            cursor: pointer;
            margin-bottom: 0.8rem;
        }
        .stars i {
            transition: color 0.15s, transform 0.15s;
        }
        .stars i.active,
        .stars i:hover {
            color: #facc15;
            transform: scale(1.1);
        }
        .stars i:hover~i {
            color: #d1d9e6;
        }
        friend-link {
            display: block;
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin-top: 2.5rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #e2e8f0;
        }
        friend-link h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
        }
        friend-link li {
            margin: 0;
        }
        friend-link a {
            color: #2563eb;
            font-weight: 500;
            font-size: 0.95rem;
        }
        friend-link a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2rem 0 1.8rem;
            margin-top: 1.5rem;
            border-top: 4px solid #facc15;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.9rem;
        }
        .footer-inner .copyright {
            color: #94a3b8;
        }
        .footer-inner .copyright strong {
            color: #facc15;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 23, 42, 0.98);
                padding: 1rem 0.5rem;
                border-radius: 12px;
                margin-top: 0.5rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                width: 100%;
                text-align: left;
            }
            .header-inner {
                align-items: center;
            }
            article h1 {
                font-size: 1.8rem;
            }
            article h2 {
                font-size: 1.5rem;
            }
            article h3 {
                font-size: 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .sidebar {
                order: 2;
            }
            .content-grid {
                gap: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.8rem;
            }
            article {
                padding: 1rem 0.8rem;
            }
            .feedback-card {
                padding: 1rem;
            }
            friend-link {
                padding: 1.2rem 1rem;
            }
        }
        .highlight {
            background: #fef9c3;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .btn-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #0f172a;
            color: #facc15;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: background 0.2s, transform 0.2s;
            border: none;
            z-index: 999;
        }
        .btn-top:hover {
            background: #1e293b;
            transform: translateY(-3px);
        }
        .schema-hidden {
            display: none;
        }