/* roulang page: index */
:root {
            --primary: #00E0FF;
            --primary-dark: #0096C8;
            --secondary: #B026FF;
            --accent: #CCFF00;
            --bg: #0B0E14;
            --card: #121925;
            --card-light: #0F1521;
            --text: #F0F6FA;
            --text-sec: #9AACBC;
            --text-muted: #6C7E8E;
            --border: rgba(0, 224, 255, 0.15);
            --border-light: rgba(255, 255, 255, 0.08);
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.5);
            --glow-primary: 0 0 20px rgba(0, 224, 255, 0.4);
            --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 15px;
            padding-top: 64px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.15s ease;
        }

        a:hover {
            color: var(--primary);
        }

        button:focus:not(:focus-visible),
        a:focus:not(:focus-visible) {
            outline: none;
        }

        a:focus-visible,
        button:focus-visible,
        .form-control:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 80px 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--primary);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 2px 10px;
            margin-bottom: 12px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .section-header p {
            color: var(--text-sec);
            font-size: 15px;
            margin-bottom: 0;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            height: 64px;
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid transparent;
            background-image: linear-gradient(to right, var(--primary), var(--secondary), transparent);
            background-position: bottom;
            background-size: 100% 1px;
            background-repeat: no-repeat;
        }

        .site-header .navbar {
            height: 64px;
            padding: 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            padding: 0;
            margin: 0;
        }

        .site-header .navbar-brand .brand-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(0, 224, 255, 0.8);
            flex-shrink: 0;
        }

        .site-header .navbar-brand .brand-qm {
            color: var(--primary);
        }

        .site-header .navbar-brand:hover {
            color: #fff;
        }

        .navbar.navbar-expand-lg .nav-link {
            font-size: 15px;
            color: #B8C7D9;
            padding: 8px 16px;
            position: relative;
            transition: color 0.15s ease;
        }

        .navbar.navbar-expand-lg .nav-link:hover {
            color: var(--primary);
        }

        .navbar.navbar-expand-lg .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .navbar.navbar-expand-lg .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 8px rgba(0, 224, 255, 0.7);
            border-radius: 2px;
        }

        .navbar-toggler {
            border: 2px solid var(--primary);
            border-radius: 6px;
            padding: 4px 8px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300E0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
            width: 1.2em;
            height: 1.2em;
        }

        .btn-nav {
            height: 36px;
            padding: 0 20px;
            font-size: 14px;
            border-radius: 6px;
        }

        /* ===== 按钮 ===== */
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.15s ease;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #041e2a;
            border: none;
            padding: 12px 28px;
            font-size: 15px;
        }

        .btn-primary:hover {
            color: #041e2a;
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: var(--glow-primary);
        }

        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 12px 28px;
            font-size: 15px;
        }

        .btn-outline:hover {
            background: rgba(0, 224, 255, 0.1);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 0 12px rgba(0, 224, 255, 0.2);
        }

        .btn-accent {
            background: var(--accent);
            color: #101820;
            border: none;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 8px;
        }

        .btn-accent:hover {
            color: #101820;
            box-shadow: 0 0 24px rgba(204, 255, 0, 0.5);
            transform: translateY(-2px);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 72vh;
            display: flex;
            align-items: center;
            position: relative;
            background:
                radial-gradient(ellipse at 20% 60%, rgba(0, 224, 255, 0.15) 0%, transparent 55%),
                linear-gradient(120deg, rgba(11, 14, 20, 0.92) 0%, rgba(11, 14, 20, 0.72) 45%, rgba(11, 14, 20, 0.35) 80%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            overflow: hidden;
        }

        .hero-content {
            max-width: 640px;
            padding: 60px 0;
        }

        .hero-content h1 {
            font-size: 46px;
            font-weight: 700;
            letter-spacing: 1px;
            line-height: 1.3;
            margin-bottom: 24px;
        }

        .hero-content .hero-sub {
            font-size: 16px;
            color: var(--text-sec);
            margin-bottom: 32px;
            max-width: 460px;
        }

        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero .scroll-indicator {
            position: absolute;
            bottom: 24px;
            left: 24px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 12px;
            letter-spacing: 1px;
        }

        .hero .scroll-indicator i {
            font-size: 18px;
            animation: scrollPulse 1.6s infinite;
        }

        @keyframes scrollPulse {
            0% {
                transform: translateY(0);
                opacity: 1;
            }
            50% {
                transform: translateY(6px);
                opacity: 0.4;
            }
            100% {
                transform: translateY(0);
                opacity: 1;
            }
        }

        /* ===== 数据条 ===== */
        .stats-bar {
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
            padding: 32px 0;
        }

        .stats-bar .stat-item {
            text-align: center;
            padding: 8px 0;
            position: relative;
        }

        .stats-bar .stat-item + .stat-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 20%;
            bottom: 20%;
            width: 1px;
            background: var(--border-light);
        }

        .stats-bar .stat-num {
            display: block;
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 224, 255, 0.5);
            line-height: 1.3;
        }

        .stats-bar .stat-label {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== CMS 动态区 ===== */
        .cms-section {
            background: var(--bg);
        }

        .featured-card {
            position: relative;
            display: block;
            height: 100%;
            min-height: 320px;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.15s ease;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .featured-card .featured-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .featured-card:hover .featured-img {
            transform: scale(1.05);
        }

        .featured-card .featured-content {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 24px;
            background: linear-gradient(to top, rgba(11, 14, 20, 0.95) 0%, rgba(11, 14, 20, 0.55) 60%, transparent 100%);
            border-radius: 0 0 var(--radius) var(--radius);
        }

        .featured-card .featured-content h3 {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            margin: 8px 0 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .featured-card .featured-content p {
            font-size: 14px;
            color: var(--text-sec);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .featured-card .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--text-muted);
            font-size: 13px;
        }

        .featured-card .news-meta .arrow {
            color: var(--primary);
            font-size: 18px;
            transition: transform 0.15s;
        }

        .featured-card:hover .news-meta .arrow {
            transform: translateX(4px);
        }

        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 2px 8px;
            transition: all 0.15s ease;
        }

        .tag:hover {
            background: var(--primary);
            color: #041e2a;
        }

        .news-item {
            display: block;
            background: var(--card-light);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 16px 18px;
            transition: all 0.15s ease;
            height: 100%;
        }

        .news-item:hover {
            border-color: var(--primary);
            background: #141d2c;
            transform: translateX(4px);
        }

        .news-item-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }

        .news-item-top time {
            font-size: 12px;
            color: var(--text-muted);
        }

        .tag-outline {
            background: transparent;
        }

        .news-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-item p {
            font-size: 14px;
            color: var(--text-sec);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item-arrow {
            font-size: 13px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-item:hover .news-item-arrow {
            gap: 8px;
        }

        .empty-state {
            border: 2px dashed var(--border);
            border-radius: var(--radius);
            padding: 60px 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 14px;
        }

        .empty-state i {
            font-size: 40px;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: block;
            opacity: 0.4;
        }

        /* ===== 核心模块 ===== */
        .modules-section {
            background: #0D1118;
        }

        .module-card {
            position: relative;
            display: block;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: all 0.15s ease;
            min-height: 160px;
        }

        .module-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 14, 20, 0.92) 0%, rgba(11, 14, 20, 0.35) 100%);
            z-index: 1;
            transition: background 0.15s ease;
        }

        .module-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .module-card:hover img {
            transform: scale(1.05);
        }

        .module-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 224, 255, 0.15);
        }

        .module-card .module-content {
            position: relative;
            z-index: 2;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            height: 100%;
        }

        .module-card .module-icon {
            font-size: 16px;
            color: var(--primary);
            margin-bottom: 6px;
            display: block;
        }

        .module-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .module-card p {
            font-size: 13px;
            color: var(--text-sec);
            margin-bottom: 6px;
        }

        .module-card .module-link {
            font-size: 13px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.15s;
        }

        .module-card:hover .module-link {
            gap: 8px;
        }

        .module-large {
            min-height: 340px;
        }

        .module-large .module-content {
            padding: 32px;
        }

        .module-large h3 {
            font-size: 26px;
        }

        .module-large p {
            font-size: 15px;
            max-width: 80%;
        }

        .module-small {
            min-height: 160px;
            flex: 1;
        }

        .module-medium {
            min-height: 200px;
        }

        /* ===== 评价轮播 ===== */
        .testimonials-section {
            background: var(--bg);
        }

        .testimonial-card {
            background: var(--card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: border-color 0.15s;
        }

        .testimonial-card:hover {
            border-color: var(--border);
        }

        .testimonial-card .quote-mark {
            font-size: 32px;
            color: var(--primary);
            font-family: Georgia, serif;
            line-height: 1;
            margin-bottom: 8px;
        }

        .testimonial-card .stars {
            color: #FFD54A;
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .testimonial-card p {
            font-size: 14px;
            color: var(--text-sec);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .testimonial-card .testimonial-author {
            font-size: 13px;
            color: var(--text-muted);
        }

        .testimonials-section .carousel-indicators {
            position: static;
            margin: 32px 0 0;
        }

        .testimonials-section .carousel-indicators button {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: rgba(0, 224, 255, 0.3);
            border: none;
            margin: 0 4px;
            transition: all 0.15s;
        }

        .testimonials-section .carousel-indicators button.active {
            background: var(--primary);
            box-shadow: 0 0 8px rgba(0, 224, 255, 0.6);
        }

        .testimonials-section .carousel-control-prev,
        .testimonials-section .carousel-control-next {
            width: 36px;
            height: 36px;
            background: rgba(0, 224, 255, 0.1);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            opacity: 0;
            transition: opacity 0.15s ease;
        }

        .testimonials-section .carousel:hover .carousel-control-prev,
        .testimonials-section .carousel:hover .carousel-control-next {
            opacity: 1;
        }

        .testimonials-section .carousel-control-prev {
            left: 0;
        }

        .testimonials-section .carousel-control-next {
            right: 0;
        }

        .testimonials-section .carousel-control-prev i,
        .testimonials-section .carousel-control-next i {
            color: var(--primary);
            font-size: 16px;
        }

        /* ===== 保障条 ===== */
        .guarantee-section {
            background: #0D1118;
            padding: 60px 0;
        }

        .guarantee-section .guarantee-item {
            text-align: center;
            padding: 16px;
            position: relative;
        }

        .guarantee-section .guarantee-item + .guarantee-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 15%;
            bottom: 15%;
            width: 1px;
            background: var(--border-light);
        }

        .guarantee-section .guarantee-icon {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }

        .guarantee-section .guarantee-title {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .guarantee-section .guarantee-desc {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: #0B0E14;
            padding: 60px 0;
            position: relative;
            border-top: 2px solid var(--primary);
            border-bottom: 2px solid var(--primary);
            background-image:
                linear-gradient(rgba(0, 224, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 224, 255, 0.04) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        .cta-banner .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin: 0;
        }

        .cta-banner p {
            color: var(--text-sec);
            font-size: 14px;
            margin: 6px 0 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-section .accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-section .accordion-item {
            background: var(--card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-section .accordion-button {
            background: var(--card-light);
            color: var(--text);
            font-size: 16px;
            font-weight: 500;
            padding: 20px;
            box-shadow: none;
            border: none;
        }

        .faq-section .accordion-button:not(.collapsed) {
            background: #141d2c;
            color: var(--primary);
            border-bottom: 1px solid var(--border);
        }

        .faq-section .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E0FF'%3e%3cpath d='M8 1a1 1 0 0 1 1 1v5h5a1 1 0 1 1 0 2H9v5a1 1 0 1 1-2 0V9H2a1 1 0 1 1 0-2h5V2a1 1 0 0 1 1-1z'/%3e%3c/svg%3e");
            transition: transform 0.2s ease;
        }

        .faq-section .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .faq-section .accordion-body {
            font-size: 15px;
            color: var(--text-sec);
            line-height: 1.7;
            padding: 16px 20px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #080B10;
            padding-top: 60px;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .brand-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(0, 224, 255, 0.8);
        }

        .site-footer .footer-brand .brand-qm {
            color: var(--primary);
        }

        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 300px;
        }

        .site-footer .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 10px;
        }

        .site-footer .footer-links a {
            color: var(--text-sec);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .site-footer .footer-links a:hover {
            color: var(--primary);
        }

        .site-footer .footer-links i {
            font-size: 12px;
            color: var(--text-muted);
        }

        .site-footer .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-contact-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--text-sec);
        }

        .site-footer .footer-contact-list i {
            color: var(--primary);
            margin-top: 3px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 40px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: #111722;
                padding: 16px;
                border-radius: 0 0 var(--radius-sm) var(--radius-sm);
                margin-top: 8px;
                border: 1px solid var(--border-light);
            }

            .navbar.navbar-expand-lg .nav-link {
                padding: 10px 12px;
                display: block;
            }

            .navbar.navbar-expand-lg .nav-link.active::after {
                display: none;
            }

            .navbar.navbar-expand-lg .nav-link.active {
                color: var(--primary);
                font-weight: 600;
                border-left: 3px solid var(--primary);
                background: rgba(0, 224, 255, 0.06);
            }

            .btn-nav {
                margin-top: 12px;
                width: 100%;
            }

            .stats-bar .stat-item + .stat-item::before {
                display: none;
            }

            .stats-bar .col-6:nth-child(2) .stat-item::before {
                display: block;
            }

            .guarantee-section .guarantee-item + .guarantee-item::before {
                display: none;
            }

            .module-large {
                min-height: 280px;
            }
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 40px 0;
            }

            .section-header {
                margin-bottom: 28px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .hero {
                min-height: 60vh;
            }

            .hero-content h1 {
                font-size: 28px;
                letter-spacing: 0.5px;
            }

            .hero-content .hero-sub {
                font-size: 15px;
            }

            .stats-bar .stat-num {
                font-size: 26px;
            }

            .featured-card {
                min-height: 240px;
            }

            .featured-card .featured-content h3 {
                font-size: 18px;
            }

            .cta-banner {
                padding: 40px 0;
            }

            .cta-banner h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 575.98px) {
            .hero-btns .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .hero .scroll-indicator {
                left: 16px;
            }

            .news-item {
                padding: 14px;
            }

            .news-item h4 {
                font-size: 15px;
            }

            .news-item p {
                font-size: 13px;
            }

            .module-card .module-content {
                padding: 16px;
            }

            .testimonial-card {
                padding: 18px;
            }

            .faq-section .accordion-button {
                font-size: 15px;
                padding: 16px;
            }
        }

/* roulang page: article */
:root {
  --primary: #00E0FF;
  --primary-dark: #0096C8;
  --secondary: #B026FF;
  --accent: #CCFF00;
  --bg-dark: #0B0E14;
  --bg-card: #121925;
  --bg-surface: #0F1521;
  --bg-input: #0D131C;
  --text-main: #F0F6FA;
  --text-secondary: #9AACBC;
  --text-weak: #6C7E8E;
  --border-primary: rgba(0, 224, 255, 0.15);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-input: #263A4D;
  --success: #00D26A;
  --warning: #FFB547;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow-primary: 0 0 20px rgba(0, 224, 255, 0.4);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --header-h: 64px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.15s ease;
}
img {
  max-width: 100%;
  height: auto;
}
button, input, textarea {
  font-family: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}
section {
  position: relative;
}
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 9999;
  transition: width 0.1s linear;
}
/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  background-image: linear-gradient(rgba(11, 14, 20, 0.92), rgba(11, 14, 20, 0.92)), linear-gradient(90deg, var(--primary), var(--secondary), transparent);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-bottom: 1px solid transparent;
  height: var(--header-h);
}
.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), transparent);
  opacity: 0.6;
}
.site-header .navbar {
  min-height: var(--header-h);
  padding: 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  padding: 0;
  letter-spacing: 0.01em;
}
.navbar-brand:hover, .navbar-brand:focus {
  color: #fff;
}
.brand-dot {
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 12px var(--primary);
  margin-right: 9px;
  flex: 0 0 auto;
  animation: dotPulse 2.4s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 8px rgba(0, 224, 255, 0.6); }
  50% { box-shadow: 0 0 20px rgba(0, 224, 255, 1); }
}
.brand-qm {
  color: var(--primary);
}
.navbar-nav {
  gap: 8px;
}
.navbar-nav .nav-link {
  font-size: 15px;
  color: #B8C7D9;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.15s ease;
  font-weight: 400;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--primary);
  background: rgba(0, 224, 255, 0.08);
}
.navbar-nav .nav-link.active {
  color: var(--primary);
  font-weight: 600;
  background: transparent;
}
.navbar-nav .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(0, 224, 255, 0.8);
}
.btn-nav {
  height: 36px;
  padding: 6px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #041e2a;
  font-weight: 600;
  font-size: 14px;
  border: none;
  transition: all 0.15s ease;
}
.btn-nav:hover, .btn-nav:focus {
  color: #041e2a;
  filter: brightness(1.1);
  box-shadow: 0 0 16px rgba(0, 224, 255, 0.4);
  transform: translateY(-1px);
}
.navbar-toggler {
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  background: transparent;
}
.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.2);
  outline: none;
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300E0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  width: 1.4em;
  height: 1.4em;
}
/* ===== Buttons ===== */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: 12px 28px;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #041e2a;
  border: none;
  font-size: 15px;
}
.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, #33e6ff 0%, var(--primary-dark) 100%);
  color: #041e2a;
  transform: translateY(-2px);
  box-shadow: var(--glow-primary);
}
.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.95);
}
.btn-outline-primary {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 14px;
  padding: 10px 24px;
}
.btn-outline-primary:hover, .btn-outline-primary:focus {
  background: rgba(0, 224, 255, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(0, 224, 255, 0.25);
}
.btn-outline-primary:active {
  transform: translateY(0);
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
/* ===== Breadcrumb Banner ===== */
.page-banner {
  padding: 44px 0 20px;
  background:
    linear-gradient(135deg, rgba(176, 38, 255, 0.15), transparent 45%),
    linear-gradient(315deg, rgba(0, 224, 255, 0.1), transparent 55%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  border-bottom: 1px solid var(--border-primary);
  position: relative;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(11, 14, 20, 0.7);
}
.page-banner .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  margin: 0;
  padding: 0;
  background: transparent;
}
.breadcrumb-item {
  font-size: 12px;
  color: var(--text-weak);
}
.breadcrumb-item + .breadcrumb-item::before {
  color: var(--text-weak);
  content: ">";
  padding: 0 8px;
}
.breadcrumb-item a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}
.breadcrumb-item a:hover {
  color: var(--primary);
}
.breadcrumb-item.active {
  color: var(--text-main);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: bottom;
}
/* ===== Article Header ===== */
.article-header {
  padding: 40px 0 0;
}
.article-header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 0 28px;
  border-bottom: 1px solid var(--border-primary);
}
.article-header h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-main);
  margin: 0 0 20px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 8px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}
.meta-item i {
  color: var(--primary);
  font-size: 13px;
}
.meta-category {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 224, 255, 0.1);
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}
.meta-category:hover {
  background: var(--primary);
  color: #041e2a;
}
/* ===== Article Body ===== */
.article-body-wrap {
  padding: 32px 0 16px;
}
.article-body {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
}
.article-content {
  max-width: 780px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  word-break: break-word;
}
.article-content p {
  margin: 0 0 16px;
}
.article-content p:last-child {
  margin-bottom: 0;
}
.article-content h2,
.article-content h3 {
  border-left: 3px solid var(--primary);
  padding-left: 12px;
  margin: 32px 0 16px;
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.4;
}
.article-content h2 {
  font-size: 24px;
}
.article-content h3 {
  font-size: 20px;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin: 20px 0 12px;
}
.article-content img {
  max-width: 100%;
  border-radius: var(--radius-lg);
  height: auto;
  margin: 20px 0;
  box-shadow: var(--shadow-card);
}
.article-content img + em {
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
  font-style: normal;
  margin: -12px 0 20px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(0, 224, 255, 0.06);
  margin: 20px 0;
  padding: 16px 20px;
  color: var(--text-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 15px;
}
.article-content blockquote p {
  margin-bottom: 8px;
}
.article-content blockquote p:last-child {
  margin-bottom: 0;
}
.article-content ul,
.article-content ol {
  padding-left: 20px;
  margin: 16px 0;
}
.article-content ul li {
  padding: 6px 0;
  position: relative;
  color: var(--text-main);
}
.article-content ul li::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 16px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--primary);
  border-radius: 2px;
  transform: rotate(45deg);
}
.article-content ul li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.article-content ul li:last-child {
  border-bottom: none;
}
.article-content ol li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 6px 0;
}
.article-content ol li:last-child {
  border-bottom: none;
}
.article-content ol {
  list-style-type: decimal;
  list-style-position: outside;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(0, 224, 255, 0.4);
}
.article-content a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}
.article-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin: 20px 0;
  overflow: hidden;
}
.article-content table th,
.article-content table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-card);
  font-size: 15px;
}
.article-content table th {
  background: rgba(0, 224, 255, 0.08);
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
}
.article-content table tr:last-child td {
  border-bottom: none;
}
.article-content code {
  background: rgba(0, 224, 255, 0.08);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.article-footer-tags {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border-card);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--primary);
  background: rgba(0, 224, 255, 0.08);
  border: 1px solid rgba(0, 224, 255, 0.3);
  padding: 4px 14px;
  border-radius: 20px;
  transition: all 0.15s ease;
}
.tag-badge:hover {
  background: var(--primary);
  color: #041e2a;
}
.tag-badge i {
  font-size: 11px;
}
/* ===== Empty State ===== */
.article-empty {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px dashed var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  text-align: center;
}
.empty-icon {
  font-size: 52px;
  color: var(--primary);
  margin-bottom: 20px;
  opacity: 0.7;
}
.article-empty h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.article-empty p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
/* ===== Related Section ===== */
.article-related {
  padding: 48px 0 16px;
}
.related-inner {
  max-width: 860px;
  margin: 0 auto;
}
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: "";
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(0, 224, 255, 0.4);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 12px;
  transition: all 0.15s ease;
}
.related-card:hover, .related-card:focus {
  border-color: var(--primary);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45), 0 0 16px rgba(0, 224, 255, 0.15);
  transform: translateY(-3px);
}
.related-card img {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  flex: 0 0 auto;
}
.related-info {
  min-width: 0;
  position: relative;
  flex: 1;
}
.related-info h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-time {
  font-size: 12px;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 5px;
}
.related-arrow {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(0, 224, 255, 0.1);
  color: var(--primary);
  font-size: 11px;
  opacity: 0;
  transform: translateX(-6px);
  transition: all 0.15s ease;
}
.related-card:hover .related-arrow {
  opacity: 1;
  transform: translateX(0);
}
/* ===== Return Entry ===== */
.article-return {
  padding: 8px 0 56px;
}
.return-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
/* ===== Footer ===== */
.site-footer {
  background: #080B10;
  border-top: 1px solid rgba(0, 224, 255, 0.12);
  margin-top: 48px;
}
.site-footer .container {
  padding-top: 60px;
  padding-bottom: 0;
}
.footer-brand {
  display: flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}
.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0;
  max-width: 320px;
}
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}
.footer-links {
  margin: 0;
  padding: 0;
}
.footer-links li {
  margin-bottom: 12px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}
.footer-links a i {
  font-size: 10px;
  color: var(--primary);
  transition: transform 0.15s ease;
}
.footer-links a:hover {
  color: var(--primary);
}
.footer-links a:hover i {
  transform: translateX(3px);
}
.footer-contact-list {
  margin: 0;
  padding: 0;
}
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.5;
}
.footer-contact-list li i {
  color: var(--primary);
  margin-top: 3px;
  flex: 0 0 auto;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 40px;
}
/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .site-header {
    height: auto;
    min-height: var(--header-h);
  }
  .navbar-collapse {
    background: #111722;
    border-radius: var(--radius-md);
    padding: 16px;
    margin-top: 12px;
    border: 1px solid var(--border-primary);
  }
  .navbar-nav {
    gap: 4px;
    margin-bottom: 12px;
  }
  .navbar-nav .nav-link {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
  }
  .navbar-nav .nav-link.active::after {
    display: none;
  }
  .navbar-nav .nav-link.active {
    background: rgba(0, 224, 255, 0.1);
  }
  .btn-nav {
    width: 100%;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .related-card:last-child {
    grid-column: 1 / -1;
  }
}
@media (max-width: 767.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .page-banner {
    padding: 32px 0 16px;
  }
  .article-header {
    padding-top: 28px;
  }
  .article-header h1 {
    font-size: 28px;
  }
  .article-meta {
    gap: 14px;
  }
  .article-body {
    padding: 28px 20px;
    border-radius: 10px;
  }
  .article-content {
    font-size: 15px;
  }
  .article-content h2 {
    font-size: 20px;
  }
  .article-content h3 {
    font-size: 18px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card:last-child {
    grid-column: auto;
  }
  .related-card {
    padding: 10px;
  }
  .return-inner {
    flex-direction: column;
    align-items: stretch;
  }
  .return-inner .btn {
    width: 100%;
  }
  .site-footer .container {
    padding-top: 40px;
  }
  .footer-bottom {
    margin-top: 24px;
  }
}
@media (max-width: 575.98px) {
  .article-header h1 {
    font-size: 24px;
  }
  .article-meta {
    flex-wrap: wrap;
    gap: 10px;
  }
  .article-body-wrap {
    padding-top: 24px;
  }
  .article-body {
    padding: 20px 14px;
  }
  .meta-item {
    font-size: 12px;
  }
  .breadcrumb-item.active {
    max-width: 180px;
  }
  .related-card img {
    width: 100px;
    height: 68px;
  }
  .related-info h3 {
    font-size: 13px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #00E0FF;
            --primary-dark: #0096C8;
            --secondary: #B026FF;
            --accent: #CCFF00;
            --bg-dark: #0B0E14;
            --surface: #121925;
            --surface-2: #0F1521;
            --border: rgba(0, 224, 255, 0.15);
            --text-main: #F0F6FA;
            --text-secondary: #9AACBC;
            --text-muted: #6C7E8E;
            --success: #00D26A;
            --warning: #FFB547;
            --radius-lg: 12px;
            --radius-md: 8px;
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.5);
            --glow-primary: 0 0 20px rgba(0, 224, 255, 0.4);
            --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
            --transition: 150ms ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-stack);
            background: var(--bg-dark);
            color: var(--text-main);
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            display: block;
        }

        button,
        input {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-pad {
            padding: 80px 0;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }

        .site-header::after {
            content: "";
            display: block;
            height: 1px;
            background: linear-gradient(90deg, #00E0FF, #B026FF, transparent);
        }

        .navbar {
            min-height: 64px;
            padding-top: 0;
            padding-bottom: 0;
        }

        .navbar-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.01em;
        }

        .navbar-brand:hover {
            color: #fff;
        }

        .brand-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 14px var(--primary), 0 0 6px rgba(0, 224, 255, 0.8);
            flex-shrink: 0;
        }

        .brand-qm {
            color: var(--primary);
        }

        .navbar-nav .nav-link {
            font-size: 15px;
            color: #B8C7D9;
            padding: 8px 18px;
            position: relative;
            transition: color var(--transition);
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary);
            border-radius: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            color: #041e2a !important;
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 12px 28px;
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: linear-gradient(135deg, #33e6ff, #00a8e0);
            transform: translateY(-2px);
            box-shadow: var(--glow-primary);
            color: #041e2a !important;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-accent {
            background: var(--accent);
            border: none;
            color: #101820 !important;
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 12px 30px;
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            box-shadow: 0 0 24px rgba(204, 255, 0, 0.5);
            transform: translateY(-2px);
            color: #101820 !important;
        }

        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            background: transparent;
            border-radius: var(--radius-md);
            padding: 12px 30px;
            transition: all var(--transition);
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 224, 255, 0.08);
            transform: translateY(-2px);
        }

        .btn-nav {
            height: 36px;
            padding: 0 22px;
            display: inline-flex;
            align-items: center;
            border-radius: 6px;
            font-size: 14px;
        }

        .navbar-toggler {
            border: 2px solid var(--primary);
            border-radius: 6px;
            padding: 4px 10px;
            background: transparent;
            transition: box-shadow var(--transition);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300E0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0 70px;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(11, 14, 20, 0.92) 20%, rgba(11, 14, 20, 0.72) 55%, rgba(11, 14, 20, 0.55) 100%);
        }

        .category-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(180deg, transparent, var(--bg-dark));
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero .breadcrumb-custom {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 18px;
            display: flex;
            gap: 6px;
            align-items: center;
        }

        .category-hero .breadcrumb-custom a {
            color: var(--text-secondary);
        }

        .category-hero .breadcrumb-custom a:hover {
            color: var(--primary);
        }

        .category-hero .breadcrumb-custom i {
            font-size: 10px;
            color: var(--text-muted);
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            letter-spacing: 0.01em;
            margin-bottom: 14px;
            line-height: 1.25;
            color: #fff;
        }

        .category-hero h1 .brand-highlight {
            color: var(--primary);
        }

        .category-hero .hero-lead {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.75;
            margin-bottom: 10px;
        }

        .category-hero .hero-meta {
            display: flex;
            gap: 18px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .category-hero .hero-meta span {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-hero .hero-meta i {
            color: var(--primary);
            font-size: 12px;
        }

        /* ===== Stats strip ===== */
        .stats-strip {
            border-bottom: 1px solid var(--border);
            padding: 28px 0;
        }

        .stats-strip .row {
            margin: 0;
        }

        .stats-strip .stat-item {
            border-right: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            padding: 8px 0;
        }

        .stats-strip .stat-item:last-child {
            border-right: none;
        }

        .stats-strip .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 14px rgba(0, 224, 255, 0.5);
            line-height: 1.2;
        }

        .stats-strip .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Intro section ===== */
        .intro-section {
            padding: 80px 0;
        }

        .intro-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
        }

        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 400ms ease;
        }

        .intro-media:hover img {
            transform: scale(1.04);
        }

        .intro-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.005em;
            line-height: 1.4;
            position: relative;
            padding-bottom: 16px;
        }

        .intro-text h2::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 56px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
        }

        .intro-text p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 15px;
        }

        .intro-points {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .intro-points span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 20px;
        }

        .intro-points i {
            color: var(--primary);
            font-size: 12px;
        }

        /* ===== Info cards section ===== */
        .info-section {
            padding: 80px 0;
            border-top: 1px solid var(--border);
            background: linear-gradient(180deg, var(--bg-dark) 0%, #0D1219 100%);
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            font-size: 15px;
        }

        .feature-card {
            position: relative;
            background: url('/assets/images/coverpic/cover-1.webp') center center / cover no-repeat;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover), 0 0 24px rgba(0, 224, 255, 0.15);
            border-color: var(--primary);
        }

        .feature-card::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(200deg, rgba(11, 14, 20, 0.2) 0%, rgba(11, 14, 20, 0.9) 90%);
            transition: background var(--transition);
        }

        .feature-card:hover::before {
            background: linear-gradient(200deg, rgba(11, 14, 20, 0.1) 0%, rgba(11, 14, 20, 0.94) 90%);
        }

        .feature-card .feature-content {
            position: relative;
            z-index: 2;
            padding: 28px;
            width: 100%;
        }

        .info-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            border: 1px solid var(--primary);
            background: rgba(11, 14, 20, 0.75);
            padding: 2px 10px;
            border-radius: 4px;
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }

        .feature-card .feature-title {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .feature-card .feature-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 90%;
            margin-bottom: 12px;
        }

        .feature-card .feature-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .feature-card .feature-meta a {
            color: var(--primary);
        }

        .feature-card .feature-meta a i {
            transition: transform var(--transition);
        }

        .feature-card .feature-meta a:hover i {
            transform: translateX(4px);
        }

        /* horizontal info card */
        .info-card-h {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            display: flex;
            overflow: hidden;
            height: 100%;
            min-height: 158px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .info-card-h:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover), 0 0 18px rgba(0, 224, 255, 0.12);
            border-color: var(--primary);
        }

        .info-card-h .thumb {
            flex: 0 0 130px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .info-card-h .thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent, var(--surface));
        }

        .info-card-h .info-body {
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .info-card-h .info-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin: 6px 0 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card-h .info-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }

        .info-card-h .info-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .info-card-h .info-meta a {
            color: var(--primary);
        }

        .info-card-h .info-meta a i {
            transition: transform var(--transition);
        }

        .info-card-h .info-meta a:hover i {
            transform: translateX(3px);
        }

        /* default info grid card */
        .info-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover), 0 0 22px rgba(0, 224, 255, 0.14);
            border-color: var(--primary);
        }

        .info-card .card-bg {
            background-size: cover;
            background-position: center;
            min-height: 160px;
            position: relative;
        }

        .info-card .card-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(11, 14, 20, 0.7));
        }

        .info-card .card-bg .info-tag {
            position: relative;
            z-index: 2;
            top: 12px;
            left: 14px;
            margin-bottom: 0;
        }

        .info-card .card-content {
            padding: 20px;
        }

        .info-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .info-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .info-card .card-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .info-card .card-bottom a {
            color: var(--primary);
        }

        .info-card .card-bottom a i {
            transition: transform var(--transition);
        }

        .info-card .card-bottom a:hover i {
            transform: translateX(4px);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            border-top: 1px solid var(--border);
        }

        .faq-section h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 32px;
        }

        .faq-accordion .accordion-item {
            background: var(--surface-2);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            padding: 20px 22px;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .faq-accordion .accordion-button::after {
            background-image: none;
            content: "\f055";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform var(--transition);
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 224, 255, 0.06);
            color: var(--primary);
            border-bottom: 1px solid rgba(0, 224, 255, 0.2);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.2);
        }

        .faq-accordion .accordion-button .faq-icon {
            color: var(--primary);
            font-size: 14px;
            flex-shrink: 0;
        }

        .faq-accordion .accordion-body {
            padding: 18px 22px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 40px 0 80px;
            border-top: 1px solid var(--border);
        }

        .cta-banner {
            position: relative;
            background:
                linear-gradient(rgba(11, 14, 20, 0.85), rgba(11, 14, 20, 0.9)),
                repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.03) 0, rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 12px);
            border: 2px solid var(--primary);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            box-shadow: 0 0 40px rgba(0, 224, 255, 0.08);
        }

        .cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .cta-banner p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
        }

        .cta-banner .btn-group-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #080B10;
            padding-top: 60px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 340px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links,
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-links a i {
            font-size: 11px;
            color: var(--primary);
        }

        .footer-contact-list li {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 10px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .footer-contact-list li i {
            color: var(--primary);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .footer-bottom {
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: #111722;
                padding: 16px 20px;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                margin-top: 8px;
            }

            .navbar-nav .nav-link {
                padding: 10px 12px;
            }

            .navbar-nav .nav-link.active::after {
                display: none;
            }

            .navbar-nav .nav-link.active {
                background: rgba(0, 224, 255, 0.1);
                border-radius: 6px;
            }

            .btn-nav {
                margin-top: 12px;
            }

            .category-hero {
                padding: 60px 0 50px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .info-card-h .thumb {
                flex-basis: 110px;
            }
        }

        @media (max-width: 767px) {
            .section-pad,
            .intro-section,
            .info-section,
            .faq-section {
                padding: 50px 0;
            }

            .category-hero {
                padding: 44px 0 38px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .category-hero .hero-lead {
                font-size: 14px;
            }

            .stats-strip {
                padding: 20px 0;
            }

            .stats-strip .stat-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                padding: 14px 0;
            }

            .stats-strip .stat-item:last-child {
                border-bottom: none;
            }

            .feature-card {
                min-height: 280px;
            }

            .info-card-h {
                flex-direction: column;
            }

            .info-card-h .thumb {
                flex-basis: 120px;
                min-height: 120px;
            }

            .info-card-h .thumb::after {
                background: linear-gradient(180deg, transparent, var(--surface));
            }

            .cta-banner {
                padding: 40px 20px;
            }

            .cta-banner h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .navbar-brand {
                font-size: 18px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .section-head h2,
            .faq-section h2,
            .intro-text h2 {
                font-size: 24px;
            }

            .feature-card .feature-title {
                font-size: 18px;
            }

            .btn-primary,
            .btn-accent,
            .btn-outline-light {
                width: 100%;
                padding: 12px 16px;
            }

            .btn-group-cta {
                flex-direction: column;
                width: 100%;
            }

            .cta-banner .btn-group-cta .btn {
                width: 100%;
            }
        }