*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
            background: #0b0e14;
            color: #e8edf5;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #6fa8ff;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #a6c8ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            color: #f0f4fe;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.9rem;
            border-bottom: 2px solid #2d3748;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.25rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #d3dcec;
        }
        strong {
            color: #f0f4fe;
            font-weight: 600;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: #141a24;
            border-bottom: 1px solid #2a354a;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
            background: rgba(20, 26, 36, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.6rem 1rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 700;
            color: #f0f4fe;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: #6fa8ff;
            font-size: 1.8rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #a6c8ff;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid #3a4a62;
            color: #e8edf5;
            font-size: 1.5rem;
            padding: 0.3rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #1f2a3a;
        }
        .main-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 0.2rem 1.2rem;
            align-items: center;
        }
        .main-nav a {
            color: #bcc8e0;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            position: relative;
            font-weight: 500;
        }
        .main-nav a:hover {
            color: #f0f4fe;
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0%;
            height: 2px;
            background: #6fa8ff;
            transition: width 0.25s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            background: #10161f;
            padding: 0.6rem 0;
            border-bottom: 1px solid #1f2a3a;
            font-size: 0.85rem;
            color: #8896b0;
        }
        .breadcrumb a {
            color: #6fa8ff;
        }
        .breadcrumb a:hover {
            color: #a6c8ff;
        }
        .breadcrumb span {
            color: #6b7a94;
            margin: 0 0.3rem;
        }
        .hero-section {
            padding: 2.5rem 0 1.5rem;
            background: linear-gradient(145deg, #0f1620 0%, #1a2332 100%);
        }
        .hero-section h1 {
            font-size: 2.6rem;
            margin-bottom: 0.6rem;
        }
        .hero-section .meta {
            color: #8896b0;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            margin: 0.5rem 0 1.2rem;
        }
        .hero-section .meta i {
            margin-right: 0.3rem;
        }
        .hero-img-wrap {
            border-radius: 12px;
            overflow: hidden;
            margin: 1.8rem 0 2rem;
            background: #1a2332;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }
        .hero-img-wrap img {
            width: 100%;
            height: auto;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .hero-img-wrap .img-caption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #8896b0;
            background: #10161f;
        }
        .content-area {
            padding: 2rem 0 3rem;
        }
        .content-area .container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .article-body {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
            background: #141a24;
            border-radius: 12px;
            padding: 1.5rem 1.2rem;
            border: 1px solid #2a354a;
            max-height: 80vh;
            overflow-y: auto;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            margin-bottom: 1rem;
            border-bottom: 1px solid #2a354a;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar ul li {
            margin-bottom: 0.5rem;
        }
        .sidebar ul li a {
            color: #bcc8e0;
            font-size: 0.9rem;
            display: block;
            padding: 0.25rem 0;
            border-left: 2px solid transparent;
            padding-left: 0.6rem;
            transition: all 0.2s;
        }
        .sidebar ul li a:hover {
            color: #f0f4fe;
            border-left-color: #6fa8ff;
            text-decoration: none;
            padding-left: 0.9rem;
        }
        .interactive-modules {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.5rem 0;
            padding: 1.5rem 0;
            border-top: 1px solid #2a354a;
            border-bottom: 1px solid #2a354a;
        }
        .module-card {
            background: #141a24;
            border: 1px solid #2a354a;
            border-radius: 10px;
            padding: 1.5rem 1.2rem;
        }
        .module-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .module-card form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 0.8rem;
        }
        .module-card input,
        .module-card textarea,
        .module-card select {
            background: #1a2332;
            border: 1px solid #2d3748;
            color: #e8edf5;
            padding: 0.6rem 0.9rem;
            border-radius: 6px;
            font-size: 0.95rem;
            width: 100%;
            transition: border 0.2s;
        }
        .module-card input:focus,
        .module-card textarea:focus,
        .module-card select:focus {
            outline: none;
            border-color: #6fa8ff;
        }
        .module-card textarea {
            min-height: 70px;
            resize: vertical;
        }
        .module-card .btn {
            background: #2d4a76;
            border: none;
            color: #f0f4fe;
            padding: 0.55rem 1.4rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .module-card .btn:hover {
            background: #3d5f92;
            transform: translateY(-1px);
        }
        .module-card .btn:active {
            transform: scale(0.97);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #4a5a74;
            cursor: pointer;
            margin: 0.4rem 0;
            flex-wrap: wrap;
        }
        .rating-stars i {
            transition: color 0.2s, transform 0.1s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f5c842;
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            padding: 2rem 0 1.5rem;
            border-top: 1px solid #2a354a;
            margin-top: 2rem;
        }
        friend-link .friend-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #f0f4fe;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.8rem;
        }
        friend-link .friend-list a {
            color: #8896b0;
            font-size: 0.92rem;
            padding: 0.2rem 0;
        }
        friend-link .friend-list a:hover {
            color: #a6c8ff;
        }
        .site-footer {
            background: #0b0e14;
            padding: 1.8rem 0;
            border-top: 1px solid #1a2332;
            text-align: center;
            font-size: 0.85rem;
            color: #6b7a94;
        }
        .site-footer .copyright {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.5rem 2rem;
            align-items: center;
        }
        .site-footer .copyright i {
            margin-right: 0.3rem;
        }
        @media (max-width: 900px) {
            .content-area .container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: relative;
                top: 0;
                max-height: none;
                order: 2;
                margin-top: 1.5rem;
            }
            .interactive-modules {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 640px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 0.8rem 0 0.4rem;
                gap: 0.3rem 0;
                border-top: 1px solid #2a354a;
                margin-top: 0.6rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.5rem 0;
                border-bottom: 1px solid #1a2332;
            }
            .header-inner {
                align-items: center;
            }
            .hero-section h1 {
                font-size: 1.7rem;
            }
            .module-card input,
            .module-card textarea,
            .module-card select {
                font-size: 0.9rem;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .sidebar {
                padding: 1rem 0.8rem;
            }
        }
        .highlight-box {
            background: #1a2332;
            border-left: 4px solid #6fa8ff;
            padding: 1.2rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .two-col-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.6rem 2rem;
            margin: 1rem 0;
        }
        @media (max-width: 500px) {
            .two-col-list {
                grid-template-columns: 1fr;
            }
        }
        .back-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #2d4a76;
            color: #f0f4fe;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
            transition: background 0.2s, transform 0.2s;
            border: none;
            cursor: pointer;
            z-index: 50;
        }
        .back-top:hover {
            background: #3d5f92;
            transform: translateY(-3px);
        }
        @media (max-width: 600px) {
            .back-top {
                bottom: 1.2rem;
                right: 1.2rem;
                width: 38px;
                height: 38px;
                font-size: 1.1rem;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #141a24;
            border-radius: 8px;
            overflow: hidden;
        }
        table th,
        table td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #2a354a;
        }
        table th {
            background: #1f2a3a;
            color: #f0f4fe;
            font-weight: 600;
        }
        table tr:last-child td {
            border-bottom: none;
        }
        .tag {
            display: inline-block;
            background: #1f2a3a;
            color: #bcc8e0;
            padding: 0.15rem 0.7rem;
            border-radius: 20px;
            font-size: 0.8rem;
            margin: 0.2rem 0.1rem;
        }