*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #0b0e14;
            color: #e8edf5;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #6fc3df;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus-visible {
            color: #a8e6ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: #f0f4fc;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
            border-bottom: 2px solid #2a3a4e;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.9rem;
            border-left: 4px solid #5fa3c9;
            padding-left: 0.75rem;
            margin-top: 2.8rem;
        }
        h3 {
            font-size: 1.45rem;
            margin-top: 2rem;
            color: #d6e4f0;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.4rem;
            color: #b8cde0;
        }
        p {
            margin-bottom: 1.1rem;
        }
        strong,
        b {
            color: #f5f9ff;
            font-weight: 600;
        }
        em {
            color: #cfdef5;
        }
        hr {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, #2a3a4e, transparent);
            margin: 2.5rem 0;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        header {
            background: #111821;
            border-bottom: 1px solid #2a3a4e;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background-color: rgba(11, 14, 20, 0.92);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.7rem 0;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #6fc3df, #a8e6ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #6fc3df;
            font-size: 1.6rem;
        }
        .my-logo:hover {
 opacity: 0.85;
            text-decoration: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 0.2rem 0.8rem;
            flex-wrap: wrap;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            padding: 0.4rem 0.7rem;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            color: #c8d6e8;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-list li a:hover,
        .nav-list li a.active {
            background: #1f2c3a;
            color: #a8e6ff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #e8edf5;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #1f2c3a;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            padding: 0.7rem 0 0.3rem;
            font-size: 0.85rem;
            color: #8899b0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #6fc3df;
        }
        .breadcrumb span {
            color: #5f7a94;
        }
        main {
            flex: 1;
            padding: 1.2rem 0 3rem;
        }
        .article-content {
            background: #131b24;
            border-radius: 16px;
            padding: 2rem 2rem 2.8rem;
            margin-top: 1rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
            border: 1px solid #233040;
        }
        .article-content p {
            text-align: justify;
        }
        .feature-image {
            margin: 1.8rem 0 2.2rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
            background: #1a2633;
        }
        .feature-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 1200/630;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.7rem 1rem;
            font-size: 0.88rem;
            color: #9aafc7;
            background: #1a2633;
            border-top: 1px solid #2a3a4e;
            font-style: italic;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #7a93ae;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .last-updated i {
            color: #5fa3c9;
        }
        .highlight-box {
            background: #1a2a38;
            border-left: 4px solid #5fa3c9;
            padding: 1.2rem 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 1.6rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.6rem 0;
        }
        .stat-card {
            background: #1a2633;
            padding: 1rem 1.2rem;
            border-radius: 10px;
            text-align: center;
            border: 1px solid #2a3a4e;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 700;
            color: #6fc3df;
            display: block;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #9aafc7;
            margin-top: 0.2rem;
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            list-style: none;
            padding: 0;
            margin: 0.6rem 0 1rem;
        }
        .link-list-inline li a {
            background: #1f2c3a;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            color: #b8cde0;
            border: 1px solid #2a3a4e;
            transition: background 0.2s, border-color 0.2s;
        }
        .link-list-inline li a:hover {
            background: #2a3a4e;
            border-color: #5fa3c9;
            text-decoration: none;
        }
        .form-section {
            background: #131b24;
            border-radius: 14px;
            padding: 1.8rem 2rem;
            margin-top: 2.8rem;
            border: 1px solid #233040;
        }
        .form-section h3 {
            margin-top: 0;
            border-bottom: 1px solid #2a3a4e;
            padding-bottom: 0.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 500;
            margin-bottom: 0.3rem;
            color: #c8d6e8;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 8px;
            border: 1px solid #2a3a4e;
            background: #0f1821;
            color: #e8edf5;
            font-size: 0.95rem;
            transition: border-color 0.2s, box-shadow 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #5fa3c9;
            box-shadow: 0 0 0 3px rgba(95, 163, 201, 0.2);
        }
        .form-group textarea {
            min-height: 90px;
            resize: vertical;
        }
        .btn {
            background: #2a4a62;
            border: none;
            color: #f0f4fc;
            padding: 0.7rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #3a6a8a;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(1px);
        }
        .star-rating {
            display: flex;
            gap: 0.25rem;
            font-size: 1.8rem;
            cursor: pointer;
            direction: rtl;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #3d546b;
            transition: color 0.2s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f7c948;
        }
        .comment-item {
            background: #0f1821;
            border-radius: 10px;
            padding: 1rem 1.4rem;
            margin-bottom: 0.8rem;
            border-left: 3px solid #2a4a62;
        }
        .comment-item .meta {
            font-size: 0.82rem;
            color: #7a93ae;
            display: flex;
            gap: 0.8rem;
            margin-bottom: 0.3rem;
        }
        .comment-item .body {
            color: #d6e4f0;
        }
        friend-link {
            display: block;
            padding: 1.2rem 0 0.5rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.6rem 0.2rem 0;
            padding: 0.3rem 1rem;
            background: #1f2c3a;
            border-radius: 20px;
            font-size: 0.88rem;
            color: #b8cde0;
            border: 1px solid #2a3a4e;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #2a3a4e;
            text-decoration: none;
            color: #a8e6ff;
        }
        footer {
            background: #0d141c;
            border-top: 1px solid #1f2c3a;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem 2rem;
        }
        .footer-inner .copyright {
            font-size: 0.85rem;
            color: #6a839e;
        }
        .footer-inner .copyright strong {
            color: #9aafc7;
        }
        @media (max-width: 820px) {
            .header-inner {
                padding: 0.5rem 0;
            }
            .nav-wrapper .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #111821;
                padding: 0.8rem 0.6rem;
                border-radius: 0 0 12px 12px;
                gap: 0.2rem;
                border-top: 1px solid #2a3a4e;
                margin-top: 0.3rem;
            }
            .nav-wrapper .nav-list li a {
                padding: 0.6rem 0.8rem;
                display: block;
                white-space: normal;
            }
            .hamburger {
                display: block;
            }
            #nav-toggle:checked~.nav-wrapper .nav-list {
                display: flex;
            }
            .article-content {
                padding: 1.2rem 1rem 2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .form-section {
                padding: 1.2rem 1rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (min-width: 821px) {
            .hamburger {
                display: none !important;
            }
            .nav-list {
                display: flex !important;
            }
            #nav-toggle {
                display: none !important;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #2a4a62;
            color: #f0f4fc;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            border: none;
            cursor: pointer;
            opacity: 0.7;
            transition: opacity 0.3s, transform 0.2s;
            z-index: 50;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
        }
        .scroll-top:hover {
            opacity: 1;
            transform: translateY(-3px);
        }
        @media (max-width: 480px) {
            .scroll-top {
                bottom: 1rem;
                right: 1rem;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }