/* roulang page: index */
:root {
            --primary: #FF5A3C;
            --secondary: #8A6CFF;
            --bg: #0B0A08;
            --bg-alt: #F5F1E8;
            --text: #F7F3EC;
            --text-muted: rgba(247, 243, 236, 0.65);
            --border: #2B2824;
            --accent: #C8FF2E;
            --border-light: #D9D2C5;
            --text-dark: #1A1815;
            --text-dark-muted: rgba(26, 24, 21, 0.6);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-nav: 16px;
            --radius-input: 12px;
            --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.45);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        .section-pad {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        @media (min-width: 768px) {
            .section-pad {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }

        .card-panel {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
        }

        .card-panel:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .btn-primary {
            background: var(--primary);
            color: #1A1815;
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            white-space: nowrap;
            font-size: 15px;
        }

        .btn-primary:hover {
            background: var(--secondary);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 90, 60, 0.3);
        }

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

        .btn-outline {
            border: 1px solid var(--border);
            color: var(--text);
            background: transparent;
            border-radius: var(--radius-btn);
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: border-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
            white-space: nowrap;
            font-size: 15px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 12px;
            font-weight: 500;
            border-radius: 99px;
            background: rgba(255, 90, 60, 0.12);
            color: var(--primary);
            border: 1px solid rgba(255, 90, 60, 0.3);
            white-space: nowrap;
            transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
        }

        .badge-tag:hover {
            background: rgba(255, 90, 60, 0.25);
            border-color: var(--primary);
            color: var(--primary);
        }

        .badge-tag-secondary {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 12px;
            font-weight: 500;
            border-radius: 99px;
            background: rgba(138, 108, 255, 0.12);
            color: var(--secondary);
            border: 1px solid rgba(138, 108, 255, 0.3);
            white-space: nowrap;
        }

        .accent-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 6px rgba(200, 255, 46, 0.6);
        }

        .pixel-decoration {
            position: relative;
        }

        .pixel-decoration::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: repeating-linear-gradient(90deg,
                    var(--accent) 0px, var(--accent) 3px,
                    transparent 3px, transparent 6px);
            opacity: 0.6;
            pointer-events: none;
        }

        header.nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 10, 8, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }

        .nav-panel {
            background: rgba(20, 18, 15, 0.92);
            border: 1px solid var(--border);
            border-radius: var(--radius-nav);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(12px);
        }

        .nav-entry-card {
            width: 78px;
            height: 78px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.04);
            transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
            padding: 6px;
            text-align: center;
        }

        .nav-entry-card:hover {
            border-color: var(--primary);
            background: rgba(255, 90, 60, 0.08);
            transform: translateY(-2px);
        }

        .nav-entry-card img {
            width: 32px;
            height: 32px;
            object-fit: cover;
            border-radius: 6px;
        }

        .nav-entry-card span {
            font-size: 10px;
            line-height: 1.3;
            color: var(--text-muted);
            max-width: 70px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .nav-entry-card:hover span {
            color: var(--text);
        }

        .mobile-menu-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: transparent;
            color: var(--text);
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--primary);
            background: rgba(255, 90, 60, 0.1);
        }

        .mobile-menu-btn svg {
            width: 24px;
            height: 24px;
        }

        .mobile-nav-panel {
            display: none;
            background: rgba(20, 18, 15, 0.98);
            border: 1px solid var(--border);
            border-radius: var(--radius-nav);
            padding: 1rem;
            margin-top: 0.75rem;
        }

        .mobile-nav-panel.open {
            display: block;
        }

        .mobile-nav-entry {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0.75rem 1rem;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.03);
            margin-bottom: 0.5rem;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .mobile-nav-entry:hover {
            border-color: var(--primary);
            background: rgba(255, 90, 60, 0.08);
        }

        .mobile-nav-entry img {
            width: 36px;
            height: 36px;
            object-fit: cover;
            border-radius: 6px;
        }

        .mobile-nav-entry span {
            font-size: 14px;
            color: var(--text);
            font-weight: 500;
        }

        .index-hero-bg {
            background-image: url('/assets/images/108a076068c7185e.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            border-radius: var(--radius-nav);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .index-hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(11, 10, 8, 0.88) 0%,
                    rgba(11, 10, 8, 0.72) 40%,
                    rgba(11, 10, 8, 0.55) 70%,
                    rgba(11, 10, 8, 0.8) 100%);
            z-index: 1;
        }

        .index-hero-bg>* {
            position: relative;
            z-index: 2;
        }

        .hot-tag-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            align-items: center;
        }

        .metric-card {
            background: rgba(20, 18, 15, 0.75);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.25rem 1.5rem;
            transition: transform 0.3s ease, border-color 0.3s ease;
            backdrop-filter: blur(8px);
        }

        .metric-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 90, 60, 0.5);
        }

        .metric-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .metric-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 0.25rem;
            letter-spacing: 0.04em;
        }

        .scene-entry-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .scene-entry-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .scene-entry-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .scene-entry-body {
            padding: 0.875rem 1rem;
            display: flex;
            flex-direction: column;
            gap: 0.375rem;
        }

        .scene-entry-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .scene-entry-body p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .service-card {
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.25rem;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .service-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .service-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(255, 90, 60, 0.1);
            border: 1px solid rgba(255, 90, 60, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.4;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-dark-muted);
            line-height: 1.7;
        }

        .service-card .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.375rem;
            margin-top: auto;
        }

        .compare-panel {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            position: relative;
        }

        .compare-col {
            padding: 1.75rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.875rem;
        }

        .compare-col.dark {
            background: rgba(30, 26, 22, 0.6);
            border-bottom: 1px solid var(--border);
        }

        .compare-col.light {
            background: var(--bg-alt);
        }

        @media (min-width: 768px) {
            .compare-col.dark {
                border-bottom: none;
                border-right: 1px solid var(--border);
            }
        }

        .compare-col h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
        }

        .compare-col.dark h3 {
            color: var(--primary);
        }

        .compare-col.light h3 {
            color: #1A1815;
        }

        .compare-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.625rem;
        }

        .compare-col ul li {
            font-size: 14px;
            line-height: 1.6;
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            color: var(--text-muted);
        }

        .compare-col.light ul li {
            color: var(--text-dark-muted);
        }

        .compare-col ul li::before {
            content: '';
            flex-shrink: 0;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            margin-top: 10px;
        }

        .compare-col.dark ul li::before {
            background: #FF5A3C;
        }

        .compare-col.light ul li::before {
            background: #C8FF2E;
        }

        .milestone-track {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            position: relative;
        }

        .milestone-node {
            flex: 1;
            min-width: 160px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 0.625rem;
            position: relative;
            padding-left: 2rem;
        }

        .milestone-node::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid var(--accent);
            box-shadow: 0 0 8px rgba(255, 90, 60, 0.5);
            z-index: 2;
        }

        .milestone-node::after {
            content: '';
            position: absolute;
            left: 5px;
            top: 20px;
            bottom: -20px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary) 0%, var(--border) 100%);
            z-index: 1;
        }

        .milestone-node:last-child::after {
            display: none;
        }

        .milestone-node h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
        }

        .milestone-node p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .grid-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .grid-card:hover {
            border-color: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .grid-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .grid-card-body {
            padding: 1rem 1.125rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .grid-card-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
        }

        .grid-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .grid-card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 0.625rem;
            margin-top: auto;
        }

        .news-row {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.875rem 1.125rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .news-row:hover {
            border-color: var(--primary);
            background: rgba(255, 90, 60, 0.05);
        }

        .news-row .time-badge {
            min-width: 76px;
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
            background: rgba(200, 255, 46, 0.08);
            border: 1px solid rgba(200, 255, 46, 0.25);
            border-radius: 6px;
            padding: 0.25rem 0.5rem;
            text-align: center;
            white-space: nowrap;
        }

        .news-row .content {
            flex: 1;
            font-size: 14px;
            color: var(--text);
            line-height: 1.6;
        }

        .news-row .quality-tag {
            font-size: 12px;
            color: var(--secondary);
            white-space: nowrap;
        }

        .assurance-panel {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.25rem 1.25rem;
            display: flex;
            align-items: flex-start;
            gap: 0.875rem;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .assurance-panel:hover {
            border-color: rgba(138, 108, 255, 0.5);
            transform: translateY(-2px);
        }

        .assurance-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: rgba(138, 108, 255, 0.12);
            border: 1px solid rgba(138, 108, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: var(--secondary);
        }

        .assurance-panel h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 0.25rem;
        }

        .assurance-panel p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .quick-answer-card {
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 1.25rem 1.25rem;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .quick-answer-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .quick-answer-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
        }

        .quick-answer-card h4::before {
            content: '›';
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            line-height: 1.2;
        }

        .quick-answer-card p {
            font-size: 14px;
            color: var(--text-dark-muted);
            line-height: 1.7;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: var(--bg);
            transition: border-color 0.3s ease;
        }

        .faq-item.active {
            border-color: var(--primary);
        }

        .faq-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1rem 1.25rem;
            background: transparent;
            color: var(--text);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            line-height: 1.5;
            min-height: 48px;
            transition: background 0.3s ease;
        }

        .faq-btn:hover {
            background: rgba(255, 90, 60, 0.05);
        }

        .faq-btn .faq-arrow {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 14px;
            transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            border-color: var(--primary);
            color: var(--primary);
        }

        .faq-body {
            display: none;
            padding: 0 1.25rem 1.25rem 1.25rem;
            border-top: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .faq-item.active .faq-body {
            display: block;
        }

        .form-card {
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-nav);
            padding: 2rem 1.5rem;
            text-align: center;
        }

        .form-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 0.75rem;
        }

        .form-card p {
            font-size: 14px;
            color: var(--text-dark-muted);
            line-height: 1.7;
            margin-bottom: 1.25rem;
        }

        .form-row {
            display: flex;
            gap: 0.75rem;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .form-row input {
            flex: 1;
            min-width: 200px;
            height: 44px;
            border-radius: var(--radius-input);
            border: 1px solid var(--border-light);
            background: #fff;
            padding: 0 1rem;
            font-size: 15px;
            color: var(--text-dark);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .form-row input::placeholder {
            color: rgba(26, 24, 21, 0.4);
        }

        .form-row input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 60, 0.2);
            outline: none;
        }

        .form-note {
            font-size: 12px;
            color: var(--text-dark-muted);
            margin-top: 0.875rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .tag-cloud .tag-item {
            display: inline-flex;
            align-items: center;
            padding: 0.375rem 0.875rem;
            font-size: 13px;
            font-weight: 500;
            border-radius: 99px;
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text);
            transition: border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
        }

        .tag-cloud .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 90, 60, 0.08);
        }

        footer {
            background: #070605;
            border-top: 1px solid var(--border);
            padding-top: 3rem;
            padding-bottom: 2rem;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.875rem;
            line-height: 1.5;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.3s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 2rem;
            padding-top: 1.25rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .nav-entry-card {
                width: 64px;
                height: 64px;
            }

            .nav-entry-card span {
                font-size: 9px;
            }

            .metric-value {
                font-size: 1.5rem;
            }

            .form-card {
                padding: 1.5rem 1rem;
            }

            .milestone-track {
                flex-direction: column;
            }

            .milestone-node {
                min-width: 0;
                padding-left: 2rem;
            }

            .milestone-node::after {
                bottom: -30px;
            }
        }

        @media (max-width: 520px) {
            .section-pad {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }

            .container {
                padding-left: 12px;
                padding-right: 12px;
            }

            .metric-card {
                padding: 1rem;
            }

            .faq-btn {
                font-size: 14px;
                padding: 0.875rem 1rem;
            }
        }

/* roulang page: category1 */
:root {
 --primary: #FF5A3C;
 --secondary: #8A6CFF;
 --bg: #0B0A08;
 --bg-alt: #F5F1E8;
 --text: #F7F3EC;
 --text-muted: rgba(247, 243, 236, 0.65);
 --border: #2B2824;
 --accent: #C8FF2E;
 --border-light: #D9D2C5;
 --text-dark: #1A1815;
 --text-dark-muted: rgba(26, 24, 21, 0.6);
 --radius-card: 14px;
 --radius-btn: 10px;
 --radius-nav: 16px;
 --radius-input: 12px;
 --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.35);
 --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.45);
}
html {
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
}
body {
 font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', system-ui, -apple-system, sans-serif;
 background-color: var(--bg);
 color: var(--text);
 line-height: 1.8;
 font-size: 16px;
 overflow-x: hidden;
 margin: 0;
 padding: 0;
}
a {
 color: var(--secondary);
 text-decoration: none;
 transition: color 0.25s ease;
}
a:hover {
 color: var(--primary);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
 outline: 2px solid var(--accent);
 outline-offset: 2px;
 border-radius: 4px;
}
img {
 max-width: 100%;
 height: auto;
 display: block;
}
button {
 cursor: pointer;
 font-family: inherit;
 border: none;
 background: none;
 padding: 0;
}
input, select {
 font-family: inherit;
 border: none;
 outline: none;
}
.container {
 max-width: 1200px;
 margin: 0 auto;
 padding-left: 16px;
 padding-right: 16px;
}
.section-pad {
 padding-top: 4rem;
 padding-bottom: 4rem;
}
@media (min-width: 768px) {
 .section-pad {
  padding-top: 5rem;
  padding-bottom: 5rem;
 }
}
.card-panel {
 background: var(--bg);
 border: 1px solid var(--border);
 border-radius: var(--radius-card);
 box-shadow: var(--shadow-card);
 transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}
.card-panel:hover {
 box-shadow: var(--shadow-card-hover);
}
.btn-primary {
 background: var(--primary);
 color: #1A1815;
 border-radius: var(--radius-btn);
 font-weight: 600;
 padding: 0.75rem 1.5rem;
 display: inline-flex;
 align-items: center;
 gap: 0.5rem;
 transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
 white-space: nowrap;
 font-size: 15px;
 line-height: 1.4;
}
.btn-primary:hover {
 background: var(--secondary);
 color: var(--text);
 transform: translateY(-2px);
 box-shadow: 0 8px 20px rgba(255, 90, 60, 0.3);
}
.btn-primary:active {
 transform: translateY(0);
}
.btn-outline {
 border: 1px solid var(--border);
 color: var(--text);
 background: transparent;
 border-radius: var(--radius-btn);
 font-weight: 500;
 padding: 0.75rem 1.5rem;
 display: inline-flex;
 align-items: center;
 gap: 0.5rem;
 transition: border-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
 white-space: nowrap;
 font-size: 15px;
 line-height: 1.4;
}
.btn-outline:hover {
 border-color: var(--primary);
 color: var(--primary);
 transform: translateY(-2px);
}
.btn-outline:active {
 transform: translateY(0);
}
.badge-tag {
 display: inline-flex;
 align-items: center;
 padding: 0.25rem 0.75rem;
 font-size: 12px;
 font-weight: 500;
 border-radius: 99px;
 background: rgba(255, 90, 60, 0.12);
 color: var(--primary);
 border: 1px solid rgba(255, 90, 60, 0.3);
 white-space: nowrap;
 transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
.badge-tag:hover {
 background: rgba(255, 90, 60, 0.25);
 border-color: var(--primary);
 color: var(--primary);
}
.badge-tag-secondary {
 display: inline-flex;
 align-items: center;
 padding: 0.25rem 0.75rem;
 font-size: 12px;
 font-weight: 500;
 border-radius: 99px;
 background: rgba(138, 108, 255, 0.12);
 color: var(--secondary);
 border: 1px solid rgba(138, 108, 255, 0.3);
 white-space: nowrap;
}
header.nav-wrapper {
 position: sticky;
 top: 0;
 z-index: 100;
 background: rgba(11, 10, 8, 0.88);
 backdrop-filter: blur(16px);
 -webkit-backdrop-filter: blur(16px);
 border-bottom: 1px solid var(--border);
 padding-top: 0.75rem;
 padding-bottom: 0.75rem;
}
.nav-panel {
 background: rgba(20, 18, 15, 0.92);
 border: 1px solid var(--border);
 border-radius: var(--radius-nav);
 box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
 backdrop-filter: blur(12px);
}
.nav-entry-card {
 width: 78px;
 height: 78px;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
 gap: 4px;
 border-radius: 12px;
 border: 1px solid var(--border);
 background: rgba(255, 255, 255, 0.04);
 transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
 padding: 6px;
 text-align: center;
}
.nav-entry-card:hover {
 border-color: var(--primary);
 background: rgba(255, 90, 60, 0.08);
 transform: translateY(-2px);
}
.nav-entry-card img {
 width: 32px;
 height: 32px;
 border-radius: 6px;
 object-fit: cover;
}
.nav-entry-card span {
 font-size: 11px;
 font-weight: 500;
 color: var(--text);
 line-height: 1.2;
}
.nav-entry-card.nav-active {
 border-color: var(--primary);
 background: rgba(255, 90, 60, 0.1);
}
.nav-entry-card.nav-active span {
 color: var(--primary);
}
.mobile-nav-panel {
 display: none;
 flex-direction: column;
 gap: 8px;
 padding: 12px 8px;
 margin-top: 10px;
 background: rgba(20, 18, 15, 0.95);
 border: 1px solid var(--border);
 border-radius: var(--radius-nav);
}
.mobile-nav-panel.open {
 display: flex;
}
.mobile-nav-entry {
 display: flex;
 align-items: center;
 gap: 10px;
 padding: 8px 12px;
 border-radius: 10px;
 border: 1px solid transparent;
 transition: background 0.3s ease, border-color 0.3s ease;
}
.mobile-nav-entry:hover {
 background: rgba(255, 255, 255, 0.05);
 border-color: var(--border);
}
.mobile-nav-entry img {
 width: 36px;
 height: 36px;
 border-radius: 6px;
 object-fit: cover;
}
.mobile-nav-entry span {
 font-size: 14px;
 font-weight: 500;
 color: var(--text);
}
.mobile-nav-entry.nav-active {
 background: rgba(255, 90, 60, 0.08);
 border-color: rgba(255, 90, 60, 0.3);
}
.mobile-nav-entry.nav-active span {
 color: var(--primary);
}
.menu-btn {
 display: flex;
 align-items: center;
 justify-content: center;
 width: 40px;
 height: 40px;
 border-radius: 10px;
 border: 1px solid var(--border);
 color: var(--text);
 transition: border-color 0.3s ease, color 0.3s ease;
}
.menu-btn:hover {
 border-color: var(--primary);
 color: var(--primary);
}
.menu-btn svg {
 width: 20px;
 height: 20px;
}
/* Category page specific styles */
.cat-hero {
 position: relative;
 border-radius: var(--radius-card);
 overflow: hidden;
 border: 1px solid var(--border);
 background: #161310;
}
.cat-hero::before {
 content: '';
 position: absolute;
 inset: 0;
 background: linear-gradient(135deg, rgba(11,10,8,0.85) 0%, rgba(11,10,8,0.45) 50%, rgba(11,10,8,0.85) 100%);
 z-index: 1;
}
.cat-hero-content {
 position: relative;
 z-index: 2;
 padding: 2.5rem 1.5rem;
}
@media (min-width: 768px) {
 .cat-hero-content {
  padding: 3.5rem 2.5rem;
 }
}
.cat-hero h1 {
 font-size: 28px;
 font-weight: 900;
 color: var(--text);
 line-height: 1.35;
 margin: 0 0 0.75rem 0;
 letter-spacing: 0.01em;
}
@media (min-width: 768px) {
 .cat-hero h1 {
  font-size: 36px;
 }
}
.cat-hero p {
 font-size: 15px;
 color: var(--text-muted);
 line-height: 1.8;
 margin: 0;
 max-width: 680px;
}
.breadcrumb-row {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 13px;
 color: var(--text-muted);
 flex-wrap: wrap;
}
.breadcrumb-row a {
 color: var(--secondary);
 transition: color 0.3s ease;
}
.breadcrumb-row a:hover {
 color: var(--primary);
}
.breadcrumb-sep {
 color: var(--border);
 user-select: none;
}
.filter-panel {
 background: rgba(20, 18, 15, 0.6);
 border: 1px solid var(--border);
 border-radius: var(--radius-card);
 padding: 1.25rem;
}
.filter-group {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: 10px;
 margin-bottom: 0.75rem;
}
.filter-group:last-child {
 margin-bottom: 0;
}
.filter-label {
 font-size: 13px;
 font-weight: 600;
 color: var(--text-muted);
 min-width: 56px;
 flex-shrink: 0;
}
.filter-option {
 padding: 0.35rem 0.9rem;
 font-size: 13px;
 border-radius: 99px;
 border: 1px solid var(--border);
 background: transparent;
 color: var(--text-muted);
 cursor: pointer;
 transition: all 0.3s ease;
 white-space: nowrap;
}
.filter-option:hover {
 border-color: var(--primary);
 color: var(--primary);
}
.filter-option.active {
 background: var(--primary);
 border-color: var(--primary);
 color: #1A1815;
 font-weight: 500;
}
.resource-card {
 background: rgba(20, 18, 15, 0.7);
 border: 1px solid var(--border);
 border-radius: var(--radius-card);
 overflow: hidden;
 transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.resource-card:hover {
 border-color: rgba(255, 90, 60, 0.5);
 transform: translateY(-4px);
 box-shadow: var(--shadow-card-hover);
}
.resource-card-img {
 aspect-ratio: 16/9;
 overflow: hidden;
 background: #1A1815;
}
.resource-card-img img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 transition: transform 0.5s ease;
}
.resource-card:hover .resource-card-img img {
 transform: scale(1.06);
}
.resource-card-body {
 padding: 1rem 1.15rem 1.15rem;
}
.resource-card-title {
 font-size: 15px;
 font-weight: 700;
 color: var(--text);
 line-height: 1.5;
 margin: 0 0 0.5rem 0;
}
.resource-card-meta {
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
 align-items: center;
 font-size: 12px;
 color: var(--text-muted);
 padding-top: 0.6rem;
 border-top: 1px solid var(--border);
}
.resource-card-meta .meta-item {
 display: inline-flex;
 align-items: center;
 gap: 4px;
}
.meta-dot {
 width: 6px;
 height: 6px;
 border-radius: 50%;
 background: var(--accent);
 flex-shrink: 0;
}
.meta-dot.orange {
 background: var(--primary);
}
.tag-cloud {
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
}
.tag-cloud .badge-tag,
.tag-cloud .badge-tag-secondary {
 font-size: 13px;
 padding: 0.4rem 1rem;
 cursor: pointer;
}
.faq-item {
 border: 1px solid var(--border);
 border-radius: 12px;
 margin-bottom: 10px;
 background: rgba(20, 18, 15, 0.5);
 overflow: hidden;
 transition: border-color 0.3s ease;
}
.faq-item:hover {
 border-color: rgba(255, 90, 60, 0.4);
}
.faq-item:last-child {
 margin-bottom: 0;
}
.faq-btn {
 width: 100%;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 padding: 14px 16px;
 font-size: 14px;
 font-weight: 600;
 color: var(--text);
 text-align: left;
 transition: background 0.3s ease;
 line-height: 1.5;
}
.faq-btn:hover {
 background: rgba(255, 90, 60, 0.05);
}
.faq-btn .faq-icon {
 flex-shrink: 0;
 width: 24px;
 height: 24px;
 display: flex;
 align-items: center;
 justify-content: center;
 border-radius: 6px;
 background: rgba(255, 90, 60, 0.12);
 color: var(--primary);
 transition: transform 0.35s ease;
 font-size: 16px;
 font-weight: 700;
}
.faq-item.open .faq-icon {
 transform: rotate(45deg);
}
.faq-content {
 max-height: 0;
 overflow: hidden;
 transition: max-height 0.4s ease;
}
.faq-item.open .faq-content {
 max-height: 300px;
}
.faq-content-inner {
 padding: 0 16px 16px;
 font-size: 14px;
 color: var(--text-muted);
 line-height: 1.8;
}
.subscribe-card {
 background: linear-gradient(135deg, rgba(255,90,60,0.1) 0%, rgba(138,108,255,0.08) 50%, rgba(200,255,46,0.04) 100%);
 border: 1px solid rgba(255, 90, 60, 0.3);
 border-radius: var(--radius-card);
 padding: 2rem 1.5rem;
}
@media (min-width: 768px) {
 .subscribe-card {
  padding: 2.5rem;
 }
}
.subscribe-card h2 {
 font-size: 22px;
 font-weight: 700;
 color: var(--text);
 margin: 0 0 0.5rem 0;
 line-height: 1.4;
}
.subscribe-card p {
 font-size: 14px;
 color: var(--text-muted);
 margin: 0 0 1.25rem 0;
}
.subscribe-form {
 display: flex;
 flex-direction: column;
 gap: 10px;
}
@media (min-width: 640px) {
 .subscribe-form {
  flex-direction: row;
  align-items: center;
 }
}
.subscribe-form input {
 flex: 1;
 height: 44px;
 padding: 0 16px;
 font-size: 14px;
 border-radius: var(--radius-input);
 border: 1px solid var(--border);
 background: rgba(11, 10, 8, 0.7);
 color: var(--text);
 transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.subscribe-form input::placeholder {
 color: rgba(247, 243, 236, 0.4);
}
.subscribe-form input:focus {
 border-color: var(--primary);
 box-shadow: 0 0 0 3px rgba(255, 90, 60, 0.2);
}
.subscribe-form .btn-primary {
 height: 44px;
 padding: 0 1.5rem;
 width: 100%;
 justify-content: center;
}
@media (min-width: 640px) {
 .subscribe-form .btn-primary {
  width: auto;
 }
}
.subscribe-note {
 font-size: 12px;
 color: rgba(247, 243, 236, 0.45);
 margin-top: 0.6rem;
}
.update-row {
 display: flex;
 gap: 14px;
 padding: 14px 0;
 border-bottom: 1px solid var(--border);
 align-items: flex-start;
 transition: background 0.3s ease;
}
.update-row:last-child {
 border-bottom: none;
}
.update-row:hover {
 background: rgba(255, 255, 255, 0.02);
}
.update-row-img {
 width: 80px;
 height: 56px;
 border-radius: 8px;
 object-fit: cover;
 flex-shrink: 0;
}
.update-row-content {
 flex: 1;
 min-width: 0;
}
.update-row-title {
 font-size: 14px;
 font-weight: 600;
 color: var(--text);
 margin: 0 0 4px 0;
 line-height: 1.5;
}
.update-row-meta {
 font-size: 12px;
 color: var(--text-muted);
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
}
.back-to-top {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 font-size: 13px;
 color: var(--text-muted);
 padding: 8px 14px;
 border-radius: 8px;
 border: 1px solid var(--border);
 transition: all 0.3s ease;
}
.back-to-top:hover {
 border-color: var(--primary);
 color: var(--primary);
}
/* Footer */
footer {
 background: #0E0C0A;
 border-top: 1px solid var(--border);
 padding-top: 3rem;
 padding-bottom: 1.5rem;
 margin-top: 2rem;
}
.footer-brand {
 font-size: 16px;
 font-weight: 700;
 color: var(--text);
 margin-bottom: 0.75rem;
 letter-spacing: 0.01em;
}
.footer-links {
 list-style: none;
 padding: 0;
 margin: 0;
}
.footer-links li {
 margin-bottom: 8px;
}
.footer-links a {
 font-size: 13px;
 color: var(--text-muted);
 transition: color 0.3s ease;
}
.footer-links a:hover {
 color: var(--primary);
}
.footer-bottom {
 margin-top: 2rem;
 padding-top: 1.25rem;
 border-top: 1px solid var(--border);
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 justify-content: space-between;
 gap: 10px;
 font-size: 12px;
 color: rgba(247, 243, 236, 0.4);
}
.footer-bottom p {
 margin: 0;
}
/* Section titles */
.section-title {
 font-size: 22px;
 font-weight: 700;
 color: var(--text);
 margin: 0 0 0.5rem 0;
 line-height: 1.4;
 letter-spacing: 0.01em;
}
@media (min-width: 768px) {
 .section-title {
  font-size: 26px;
 }
}
.section-subtitle {
 font-size: 14px;
 color: var(--text-muted);
 margin: 0 0 1.5rem 0;
 line-height: 1.7;
}
/* Responsive */
@media (max-width: 767px) {
 .cat-hero h1 {
  font-size: 24px;
 }
 .filter-label {
  min-width: 48px;
 }
 .resource-card-title {
  font-size: 14px;
 }
 .update-row-img {
  width: 64px;
  height: 44px;
 }
}
@media (max-width: 520px) {
 .cat-hero-content {
  padding: 1.75rem 1rem;
 }
 .cat-hero h1 {
  font-size: 20px;
 }
 .subscribe-card h2 {
  font-size: 18px;
 }
 .section-title {
  font-size: 19px;
 }
 .faq-btn {
  font-size: 13px;
  padding: 12px 14px;
 }
}