*,
        *::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, sans-serif;
            line-height: 1.8;
            color: #1e2a3a;
            background: #f8fafc;
            padding: 0;
            margin: 0;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0d4b6e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1d2b;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 4px solid #f0b429;
            display: inline-block;
            padding-bottom: 0.2rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #f0b429;
            padding-left: 0.8rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.15rem;
            color: #2b4a6e;
        }
        p {
            margin-bottom: 1rem;
            color: #2c3e50;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0b1d2b 0%, #1e3a5f 100%);
            color: #fff;
            padding: 0.8rem 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: 1.6rem;
            font-weight: 800;
            color: #f0b429;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(240, 180, 41, 0.3);
            transition: transform 0.2s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #f7c948;
            text-decoration: none;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s ease;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 0.5rem 1.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s ease, color 0.2s ease;
        }
        .main-nav a:hover {
            background: rgba(240, 180, 41, 0.2);
            color: #f0b429;
            text-decoration: none;
        }
        .main-nav a.active {
            color: #f0b429;
            border-bottom: 2px solid #f0b429;
        }
        .breadcrumb {
            background: #fff;
            padding: 0.6rem 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.9rem;
            color: #64748b;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.4rem;
            color: #94a3b8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1e6f9f;
        }
        .breadcrumb .current {
            color: #0b1d2b;
            font-weight: 600;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        .main-content {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2rem 3rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.5rem 2rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            align-self: start;
            position: sticky;
            top: 5.5rem;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            border-bottom: 2px solid #f0b429;
            padding-bottom: 0.4rem;
            margin-top: 0;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 1rem 0 0;
        }
        .sidebar li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #1e3a5f;
            font-weight: 500;
        }
        .sidebar li a:hover {
            color: #f0b429;
            text-decoration: none;
        }
        .sidebar li a i {
            color: #f0b429;
            width: 1.2rem;
        }
        .code-box {
            background: #0b1d2b;
            color: #a8f0d0;
            font-family: 'Courier New', monospace;
            padding: 1.2rem 1.6rem;
            border-radius: 12px;
            margin: 1.2rem 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
            border: 1px solid #2d4a6e;
        }
        .code-box .code {
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: 2px;
            color: #f0b429;
            word-break: break-all;
        }
        .code-box .copy-btn {
            background: #f0b429;
            color: #0b1d2b;
            border: none;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.15s ease;
        }
        .code-box .copy-btn:hover {
            background: #f7c948;
            transform: scale(1.02);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
        }
        th {
            background: #1e3a5f;
            color: #fff;
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #eef2f6;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1e3a5f;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.2s ease;
            background: #fcfcfd;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #f0b429;
            outline: none;
            box-shadow: 0 0 0 3px rgba(240, 180, 41, 0.2);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #f0b429;
            color: #0b1d2b;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.15s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #f7c948;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1e3a5f;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.4rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #cbd5e1;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f0b429;
        }
        .comment-item {
            background: #f8fafc;
            border-radius: 12px;
            padding: 1rem 1.2rem;
            margin-bottom: 0.8rem;
            border-left: 4px solid #f0b429;
        }
        .comment-item .author {
            font-weight: 700;
            color: #0b1d2b;
        }
        .comment-item .date {
            font-size: 0.8rem;
            color: #94a3b8;
            margin-left: 0.6rem;
        }
        .comment-item .comment-text {
            margin-top: 0.3rem;
        }
        .site-footer {
            background: #0b1d2b;
            color: #cbd5e1;
            padding: 2rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer a {
            color: #94b8d9;
        }
        .site-footer a:hover {
            color: #f0b429;
        }
        .site-footer .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #1e3a5f;
            padding-top: 1.2rem;
            margin-top: 1.2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
        }
        friend-link {
            display: block;
            background: #0f2740;
            padding: 1rem 1.2rem;
            border-radius: 12px;
            margin: 1rem 0 0.5rem;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.6rem 0.2rem 0;
        }
        friend-link a::after {
            content: "•";
            color: #f0b429;
            margin-left: 0.6rem;
        }
        friend-link a:last-child::after {
            content: "";
        }
        .featured-image {
            margin: 1.8rem 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-image figcaption {
            background: #f1f5f9;
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
            color: #475569;
            text-align: center;
            font-style: italic;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f6;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            color: #475569;
            margin-bottom: 1.2rem;
        }
        .highlight {
            background: #fef8e7;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .badge {
            display: inline-block;
            background: #f0b429;
            color: #0b1d2b;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.15rem 0.6rem;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .emoji-big {
            font-size: 1.8rem;
            line-height: 1;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0f2740;
                padding: 1rem 0.8rem;
                border-radius: 12px;
                margin-top: 0.8rem;
                gap: 0.4rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.5rem 0.8rem;
                border-bottom: 1px solid #1e3a5f;
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .main-content {
                padding: 1.2rem 1rem 2rem;
            }
            .two-col {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .code-box {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .header-inner {
                gap: 0.4rem;
            }
        }
        @media (max-width: 480px) {
            html {
                font-size: 15px;
            }
            .container {
                padding: 0 0.8rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #f0b429;
            color: #0b1d2b;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
            z-index: 999;
            border: none;
        }
        .scroll-top:hover {
            background: #f7c948;
            transform: translateY(-4px);
        }
        .schema-hidden {
            display: none;
        }