/ * reset & base * /
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fa;
            color: #1e2a3a;
            line-height: 1.7;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
            color: #0b1a2b;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
        }
        h2 {
            font-size: 1.9rem;
            border-left: 5px solid #d4af37;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        / * header * /
        header {
            background: linear-gradient(145deg, #0b1a2b 0%, #1a2f44 100%);
            color: #f0f4f8;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            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;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: 1px;
            background: linear-gradient(135deg, #d4af37, #f5d77b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #aac4d4;
            color: #aac4d4;
            letter-spacing: 0;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #d4af37;
            color: #d4af37;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.25s;
        }
        .nav-toggle:hover {
            background: #d4af37;
            color: #0b1a2b;
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: 0.25s;
            color: #e8edf2;
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            background: #d4af37;
            color: #0b1a2b;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.5rem 0;
            font-size: 0.9rem;
            color: #3a4a5a;
            border-bottom: 1px solid #d0d7e0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #8a9aa8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1a5a7a;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        / * main * /
        main {
            padding: 1.8rem 0 2.4rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.2rem;
        }
        .article-body {
            background: #ffffff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.05);
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 2rem;
            font-size: 0.95rem;
            color: #4a5a6a;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 0.8rem;
            margin-bottom: 1.6rem;
        }
        .article-body .meta i {
            margin-right: 0.4rem;
            color: #d4af37;
        }
        .featured-img {
            border-radius: 16px;
            overflow: hidden;
            margin: 1.6rem 0 2rem;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
        }
        .featured-img img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .featured-img figcaption {
            background: #f0f4fa;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #2a3a4a;
            font-style: italic;
        }
        .link-card {
            display: inline-block;
            background: #eef3f9;
            border-radius: 40px;
            padding: 0.2rem 1rem 0.2rem 0.6rem;
            font-weight: 500;
            color: #1a5a7a;
            transition: 0.2s;
            border: 1px solid #d0dce8;
        }
        .link-card i {
            margin-right: 0.3rem;
            color: #d4af37;
        }
        .link-card:hover {
            background: #d4af37;
            color: #0b1a2b;
            border-color: #d4af37;
        }
        .highlight-box {
            background: #f8f4ec;
            border-left: 6px solid #d4af37;
            padding: 1.2rem 1.6rem;
            border-radius: 0 16px 16px 0;
            margin: 1.6rem 0;
        }
        .highlight-box strong {
            color: #0b1a2b;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.4rem 0;
        }
        .stat-item {
            background: #f0f4fa;
            border-radius: 16px;
            padding: 1rem;
            text-align: center;
            border: 1px solid #e2e8f0;
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #d4af37;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: #3a4a5a;
            margin-top: 0.2rem;
        }
        .comment-section,
        .score-section,
        .search-section {
            margin-top: 2.4rem;
            padding-top: 1.8rem;
            border-top: 2px solid #e2e8f0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1e2a3a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #d0dce8;
            border-radius: 12px;
            font-size: 1rem;
            transition: 0.25s;
            background: #fafcff;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #d4af37;
            outline: none;
            box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #0b1a2b;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .btn:hover {
            background: #d4af37;
            color: #0b1a2b;
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0b1a2b;
            color: #0b1a2b;
        }
        .btn-outline:hover {
            background: #0b1a2b;
            color: #fff;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #ccc;
            cursor: pointer;
        }
        .star-rating .star {
            transition: 0.2s;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #d4af37;
            transform: scale(1.1);
        }
        / * sidebar * /
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-widget {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            border-bottom: 3px solid #d4af37;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .link-list {
            list-style: none;
            padding: 0;
        }
        .link-list li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #edf2f7;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            color: #1a5a7a;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: 0.2s;
        }
        .link-list a:hover {
            color: #d4af37;
            transform: translateX(4px);
        }
        .link-list i {
            color: #d4af37;
            width: 1.2rem;
        }
        / * friend link * /
        friend-link {
            display: block;
            background: #0b1a2b;
            color: #e8edf2;
            padding: 1.6rem 0;
            margin-top: 2.4rem;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
            align-items: center;
            justify-content: center;
        }
        friend-link span {
            font-weight: 600;
            color: #d4af37;
            margin-right: 0.4rem;
        }
        friend-link a {
            color: #c4d8e8;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            border: 1px solid #2a4a5a;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        friend-link a:hover {
            background: #d4af37;
            color: #0b1a2b;
            border-color: #d4af37;
        }
        / * footer * /
        footer {
            background: #071220;
            color: #9aacbc;
            padding: 1.6rem 0;
            text-align: center;
            font-size: 0.9rem;
            border-top: 2px solid #1a2f44;
        }
        footer .container {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        footer a {
            color: #d4af37;
        }
        footer a:hover {
            text-decoration: underline;
        }
        / * responsive * /
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.4rem;
                padding-top: 0.8rem;
                border-top: 1px solid #2a4a5a;
                margin-top: 0.6rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                width: 100%;
                text-align: center;
                padding: 0.6rem;
            }
            .article-body {
                padding: 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .header-inner {
                gap: 0.4rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .article-body .meta {
                flex-direction: column;
                gap: 0.3rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        / * scroll top * /
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #d4af37;
            color: #0b1a2b;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 24px rgba(212, 175, 55, 0.3);
            transition: 0.3s;
            border: none;
            cursor: pointer;
            z-index: 50;
        }
        .scroll-top:hover {
            transform: translateY(-6px);
            box-shadow: 0 10px 32px rgba(212, 175, 55, 0.4);
        }