/* roulang page: index */
:root {
            --bg900: #0D1117;
            --bg800: #151C24;
            --bg700: #1E2832;
            --line: rgba(255, 255, 255, 0.08);
            --brand: #02C878;
            --brand-lite: #3CF2A7;
            --volt: #D9FF3D;
            --warn: #FFB800;
            --text1: #F2F7F2;
            --text2: #A7B3AE;
            --text3: #6C7A75;
            --radius-card: 16px;
            --radius-btn: 8px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 16px 40px rgba(2, 200, 120, 0.18);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--bg900);
            color: var(--text1);
            font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }
        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        a {
            color: var(--brand-lite);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--volt);
        }
        img {
            max-width: 100%;
            display: block;
        }
        .font-num {
            font-family: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
        }

        /* 网格装饰 */
        .bg-grid-pattern {
            background-image: linear-gradient(rgba(2, 200, 120, 0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(2, 200, 120, 0.06) 1px, transparent 1px);
            background-size: 48px 48px;
        }
        .bg-runway {
            background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0px, rgba(255, 255, 255, 0.04) 1px, transparent 1px, transparent 12px);
        }

        /* 打字斜切标签 */
        .slash-tag {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 6px 16px 6px 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--brand-lite);
            background: rgba(2, 200, 120, 0.1);
            border-left: 3px solid var(--brand);
            clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 40;
            height: 72px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
        }
        .logo-mark {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--brand) 0%, var(--brand-lite) 100%);
            clip-path: polygon(0 0, 100% 0, 100% 70%, 80% 100%, 0 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #0D1117;
            letter-spacing: -1px;
            border-radius: 4px;
        }
        .nav-link-item {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--text2);
            padding: 6px 2px;
            transition: color .2s;
        }
        .nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--brand), var(--volt));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .25s ease;
            border-radius: 2px;
        }
        .nav-link-item:hover {
            color: var(--volt);
        }
        .nav-link-item:hover::after {
            transform: scaleX(1);
        }
        .nav-link-item.active {
            color: #fff;
        }
        .nav-link-item.active::after {
            transform: scaleX(1);
        }

        /* 主按钮效果 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            background: var(--brand);
            color: #0D1117;
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--radius-btn);
            font-family: inherit;
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(2, 200, 120, 0.25);
            letter-spacing: .5px;
        }
        .btn-primary::after {
            content: '';
            position: absolute;
            top: 0;
            left: -80%;
            width: 40%;
            height: 100%;
            background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.45), transparent);
            transform: skewX(-25deg);
            transition: left .5s ease;
        }
        .btn-primary:hover {
            background: var(--brand-lite);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(60, 242, 167, 0.3);
            color: #0D1117;
        }
        .btn-primary:hover::after {
            left: 120%;
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border: 1px solid rgba(2, 200, 120, 0.5);
            color: var(--brand-lite);
            background: transparent;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-btn);
            transition: all .2s;
            cursor: pointer;
        }
        .btn-ghost:hover {
            border-color: var(--volt);
            color: var(--volt);
            background: rgba(2, 200, 120, 0.1);
        }

        /* Hero */
        .hero-section {
            min-height: 100vh;
            min-height: 100svh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg900);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(2, 200, 120, 0.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(2, 200, 120, 0.08) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 70%);
        }
        .hero-section::after {
            content: '';
            position: absolute;
            right: -10%;
            bottom: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(2, 200, 120, 0.15) 0%, transparent 65%);
            pointer-events: none;
        }

        .hero-panel {
            background: #fff;
            border-radius: 16px;
            padding: 28px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
            color: #1a1f24;
            position: relative;
        }
        .hero-panel-title {
            color: #1a1f24;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .hero-panel-sub {
            color: #6C7A75;
            font-size: 13px;
            margin-bottom: 20px;
        }
        .hero-input {
            width: 100%;
            height: 44px;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            padding: 0 12px;
            font-size: 14px;
            margin-bottom: 12px;
            background: #f7fafc;
            transition: border .2s;
        }
        .hero-input:focus {
            outline: none;
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(2, 200, 120, 0.15);
        }
        .btn-hero-login {
            width: 100%;
            height: 44px;
            background: var(--brand);
            border: none;
            border-radius: 8px;
            color: #0D1117;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all .2s;
            margin-bottom: 16px;
        }
        .btn-hero-login:hover {
            background: var(--brand-lite);
        }
        .sso-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #e8e8e8;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            margin-right: 8px;
            cursor: pointer;
        }

        /* 区块标题 */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-tag::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--brand);
        }
        .section-h2 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text1);
        }
        .section-sub {
            color: var(--text2);
            font-size: 16px;
            margin-top: 8px;
        }
        .highlight-mark {
            background: linear-gradient(120deg, rgba(2, 200, 120, 0.25) 0%, rgba(2, 200, 120, 0.25) 100%);
            padding: 0 6px;
            border-radius: 3px;
        }

        /* 卖点卡 */
        .value-card {
            background: var(--bg800);
            border-radius: 16px;
            padding: 28px 24px;
            height: 100%;
            border-left: 4px solid var(--brand);
            transition: all .25s ease;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .value-card::before {
            content: '';
            position: absolute;
            right: -30px;
            top: -30px;
            width: 90px;
            height: 90px;
            background: rgba(2, 200, 120, 0.06);
            border-radius: 50%;
        }
        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--brand-lite);
        }
        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(2, 200, 120, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .value-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--brand-lite);
        }
        .value-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text1);
        }
        .value-card p {
            font-size: 14px;
            color: var(--text2);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .learn-more {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-lite);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
        }
        .learn-more:hover span {
            transform: translateX(4px);
        }
        .learn-more span {
            transition: transform .2s;
            display: inline-block;
        }

        /* 程序演示区 */
        .demo-slider {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding-bottom: 16px;
            scrollbar-width: thin;
        }
        .demo-slider::-webkit-scrollbar {
            height: 4px;
            background: var(--bg800);
            border-radius: 4px;
        }
        .demo-slider::-webkit-scrollbar-thumb {
            background: var(--brand);
            border-radius: 4px;
        }
        .demo-card {
            flex: 0 0 calc((100% - 40px) / 3);
            scroll-snap-align: start;
            background: var(--bg800);
            border-radius: 16px;
            overflow: hidden;
            padding: 0 0 20px 0;
            transition: all .3s ease;
            border: 1px solid var(--line);
        }
        .demo-card:hover {
            border-color: rgba(2, 200, 120, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .demo-card-img {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            position: relative;
        }
        .demo-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .demo-card:hover .demo-card-img img {
            transform: scale(1.05);
        }
        .demo-num {
            font-family: "DIN Alternate", "Bebas Neue", sans-serif;
            font-size: 80px;
            line-height: 1;
            color: rgba(255, 255, 255, 0.1);
            position: absolute;
            top: 8px;
            right: 16px;
            z-index: 1;
            font-weight: 800;
        }

        /* Cases */
        .stat-number {
            font-family: "DIN Alternate", "Bebas Neue", sans-serif;
            font-size: 64px;
            font-weight: 700;
            color: var(--brand);
            line-height: 1.1;
        }
        .case-row {
            background: var(--bg800);
            border-radius: 16px;
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all .25s;
            margin-bottom: 10px;
            border: 1px solid transparent;
        }
        .case-row:hover {
            background: var(--bg700);
            border-color: rgba(2, 200, 120, 0.3);
            transform: translateX(4px);
        }
        .case-thumb {
            width: 112px;
            height: 72px;
            border-radius: 8px;
            flex-shrink: 0;
            overflow: hidden;
        }
        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Plan */
        .plan-card {
            background: var(--bg800);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 32px 28px;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .plan-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .plan-card.feature-plan {
            border: 2px solid var(--brand);
            box-shadow: 0 0 40px rgba(2, 200, 120, 0.1);
        }
        .plan-card.feature-plan::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 100px;
            background: radial-gradient(ellipse at 50% 120%, rgba(2, 200, 120, 0.15), transparent 75%);
            pointer-events: none;
        }
        .plan-badge {
            position: absolute;
            top: 0;
            right: 24px;
            background: var(--volt);
            color: #0D1117;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 0 0 6px 6px;
            letter-spacing: .5px;
        }
        .plan-name {
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--brand-lite);
            margin-bottom: 8px;
        }
        .plan-price {
            font-family: "DIN Alternate", "Bebas Neue", sans-serif;
            font-size: 54px;
            font-weight: 700;
            color: var(--text1);
            line-height: 1.2;
        }
        .plan-price small {
            font-size: 16px;
            color: var(--text3);
            font-weight: 400;
        }
        .plan-feature {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 15px;
            color: var(--text2);
            margin-bottom: 9px;
        }
        .plan-feature .check-icon {
            color: var(--brand);
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--line);
            border-radius: 12px;
            margin-bottom: 12px;
            background: var(--bg800);
            overflow: hidden;
            transition: border .2s;
        }
        .faq-item.active {
            border-color: rgba(2, 200, 120, 0.4);
        }
        .faq-question {
            padding: 20px 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: var(--text1);
        }
        .faq-plus {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--line);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .24s;
            flex-shrink: 0;
            font-size: 18px;
            font-weight: 400;
            color: var(--brand-lite);
        }
        .faq-item.active .faq-plus {
            transform: rotate(45deg);
            background: rgba(2, 200, 120, 0.12);
        }
        .faq-answer-wrap {
            max-height: 0;
            overflow: hidden;
            transition: max-height .24s ease;
        }
        .faq-answer {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text2);
            line-height: 1.8;
        }

        /* CTA 横幅 */
        .cta-banner {
            background: var(--bg800);
            border-radius: 16px;
            padding: 48px;
            position: relative;
            overflow: hidden;
            /* border: 1px solid var(--line); */
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 20% 120%, rgba(2, 200, 120, 0.25), transparent 55%);
            pointer-events: none;
        }

        /* Footer */
        .site-footer {
            background: #0A0E12;
            border-top: 1px dashed rgba(2, 200, 120, 0.3);
            padding: 0;
        }
        .footer-link {
            color: var(--text3);
            font-size: 14px;
            display: block;
            padding: 3px 0;
        }
        .footer-link:hover {
            color: var(--brand-lite);
        }

        /* 浮动在线咨询 */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 50;
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--brand);
            color: #0D1117;
            border-radius: 999px;
            padding: 12px 24px 12px 18px;
            font-weight: 700;
            font-size: 15px;
            box-shadow: 0 8px 30px rgba(2, 200, 120, 0.3);
            cursor: pointer;
            border: none;
            transition: all .3s ease;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }
        .float-cta.show {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .float-cta:hover {
            background: var(--brand-lite);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(2, 200, 120, 0.4);
        }
        .float-cta .pulse-dot {
            width: 8px;
            height: 8px;
            background: #0D1117;
            border-radius: 50%;
            animation: breathe 2s infinite;
        }
        @keyframes breathe {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .5;
                transform: scale(0.75);
            }
        }

        /* 滚动指示 */
        .scroll-indicator {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            text-align: center;
            z-index: 2;
        }
        .scroll-line {
            width: 1px;
            height: 36px;
            background: linear-gradient(to bottom, var(--brand), transparent);
            margin: 0 auto;
            animation: scrollDown 2s infinite;
        }
        @keyframes scrollDown {
            0% {
                transform: scaleY(0);
                transform-origin: top;
            }
            50% {
                transform: scaleY(1);
                transform-origin: top;
            }
            50.1% {
                transform: scaleY(1);
                transform-origin: bottom;
            }
            100% {
                transform: scaleY(0);
                transform-origin: bottom;
            }
        }

        /* 呼吸点 */
        .breathe-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--volt);
            border-radius: 50%;
            margin-right: 6px;
            animation: breathe 2s infinite ease;
        }

        /* 公告 */
        .notice-bar {
            background: linear-gradient(90deg, #0d1a13, #0d1117);
            border-bottom: 1px solid rgba(2, 200, 120, 0.15);
            height: 36px;
            display: flex;
            align-items: center;
        }
        .notice-content {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text2);
            white-space: nowrap;
            overflow: hidden;
        }
        .notice-content .label {
            background: rgba(217, 255, 61, 0.15);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 12px;
            color: var(--volt);
            flex-shrink: 0;
        }

        /* 移动端数字盘 */
        .mobile-nav {
            display: none;
        }

        .news-main-card {
            background: var(--bg800);
            border-radius: 16px;
            overflow: hidden;
            height: 100%;
            position: relative;
            transition: all .3s;
            border: 1px solid var(--line);
        }
        .news-main-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .news-item {
            padding: 18px 4px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: all .25s;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 16px;
        }
        .news-item:hover {
            background: rgba(255, 255, 255, 0.03);
            padding-left: 12px;
        }
        .news-item-tag {
            display: inline-block;
            font-size: 11px;
            padding: 2px 10px;
            border-radius: 999px;
            background: rgba(2, 200, 120, 0.15);
            color: var(--brand-lite);
            margin-bottom: 8px;
            letter-spacing: .3px;
        }
        .news-item-date {
            color: var(--text3);
            font-size: 13px;
            font-family: "DIN Alternate", sans-serif;
            flex-shrink: 0;
        }

        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
        }

        /* page banner 分类 */
        .category-banner {
            min-height: 240px;
            background: var(--bg800);
            display: flex;
            align-items: flex-end;
            position: relative;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(2, 200, 120, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(2, 200, 120, 0.07) 1px, transparent 1px);
            background-size: 32px 32px;
            clip-path: polygon(66% 0, 100% 0, 100% 100%, 40% 100%);
        }
        .category-banner-content {
            padding-bottom: 28px;
            position: relative;
            z-index: 2;
            padding-top: 60px;
        }
        .breadcrumb {
            font-size: 13px;
            color: var(--text3);
            margin-bottom: 16px;
            flex-wrap: wrap;
            display: flex;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--text3);
        }
        .breadcrumb a:hover {
            color: var(--brand-lite);
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 3px;
        }

        input,
        textarea,
        select {
            font-family: inherit;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .container-site {
                padding-left: 24px;
                padding-right: 24px;
            }
            .demo-card {
                flex-basis: calc((100% - 20px) / 2);
            }
            .case-row {
                flex-direction: row;
            }
        }
        @media (max-width: 768px) {
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }
            .nav-desktop {
                display: none;
            }
            .mobile-nav {
                display: block;
            }
            .desktop-header-btn {
                display: none;
            }
            .section-h2 {
                font-size: 28px;
            }
            .hero-section {
                text-align: center;
            }
            .scroll-indicator {
                display: none;
            }
            .demo-card {
                flex-basis: 100%;
            }
            .stat-number {
                font-size: 44px;
            }
            .plan-price {
                font-size: 42px;
            }
            .mobile-stack-center {
                text-align: center;
                align-items: center;
                justify-content: center;
            }
            .case-row {
                padding: 12px;
            }
            .case-thumb {
                width: 84px;
                height: 64px;
            }
            .btn-hero-mobile-full {
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .demo-card {
                flex-basis: 100%;
            }
            .value-card {
                padding: 22px 18px;
            }
            .case-row {
                display: grid;
                grid-template-columns: 80px 1fr;
                gap: 12px;
                padding: 12px;
            }
            .case-thumb {
                width: 80px;
                height: 60px;
            }
            .stat-number {
                font-size: 36px;
            }
            .news-item {
                flex-direction: column;
                gap: 2px;
            }
        }

        @media (max-width: 640px) {
            .section-h2 {
                font-size: 26px;
            }
            .plan-price {
                font-size: 38px;
            }
            .float-cta span.cta-text {
                display: none;
            }
            .float-cta {
                padding: 16px;
                border-radius: 50%;
            }
            .hero-panel {
                padding: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --bg900: #0D1117;
            --bg800: #151C24;
            --bg700: #1E2832;
            --line: rgba(255,255,255,0.08);
            --brand: #02C878;
            --brand-lite: #3CF2A7;
            --volt: #D9FF3D;
            --warn: #FFB800;
            --text1: #F2F7F2;
            --text2: #A7B3AE;
            --text3: #6C7A75;
            --radius: 16px;
            --radius-btn: 8px;
            --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
            --shadow-hover: 0 16px 40px rgba(2,200,120,0.18);
        }

        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            background: var(--bg900);
            color: var(--text1);
            font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--brand-lite);
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: var(--volt);
        }
        img {
            display: block;
            max-width: 100%;
        }
        button,
        input {
            font-family: inherit;
        }
        .container-site {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            height: 72px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .logo-mark {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand), var(--brand-lite));
            color: #07130C;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            border-radius: 10px 10px 10px 2px;
            transform: skewX(-3deg);
            letter-spacing: .5px;
        }
        .nav-desktop {
            margin-left: 0;
        }
        .nav-desktop a {
            color: var(--text2);
            font-size: 14px;
            font-weight: 500;
            margin: 0 16px;
            padding: 6px 0;
            position: relative;
            transition: color .2s;
        }
        .nav-desktop a:hover {
            color: var(--volt);
        }
        .nav-desktop a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--brand), var(--volt));
            transition: width .25s ease;
        }
        .nav-desktop a:hover::after,
        .nav-desktop a.active::after {
            width: 100%;
        }
        .nav-desktop a.active {
            color: #fff;
        }
        .btn-primary {
            background: var(--brand);
            color: #07130C;
            font-weight: 700;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 20px;
            font-size: 14px;
            transition: all .2s;
            position: relative;
            overflow: hidden;
        }
        .btn-primary:hover {
            background: var(--brand-lite);
            color: #07130C;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(60, 242, 167, 0.25);
        }
        .btn-primary::after {
            content: "";
            position: absolute;
            top: 0;
            left: -80%;
            width: 50%;
            height: 100%;
            background: linear-gradient(105deg, transparent, rgba(255,255,255,0.45), transparent);
            transform: skewX(-20deg);
        }
        .btn-primary:hover::after {
            animation: sheen .6s ease forwards;
        }
        @keyframes sheen {
            0% { left: -80%; }
            100% { left: 120%; }
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            height: 44px;
            padding: 0 20px;
            border: 1px solid rgba(255,255,255,.18);
            border-radius: 8px;
            color: var(--text1);
            font-weight: 500;
            font-size: 14px;
            transition: all .2s;
        }
        .btn-outline:hover {
            border-color: var(--brand-lite);
            color: var(--brand-lite);
            box-shadow: 0 0 0 1px rgba(60, 242, 167, .2);
        }
        .breathe-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--brand);
            border-radius: 99px;
            animation: breathe 2s infinite;
        }
        @keyframes breathe {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(2, 200, 120, .5); transform: scale(1); }
            50% { opacity: .7; box-shadow: 0 0 0 5px rgba(2, 200, 120, 0); transform: scale(.85); }
        }
        .nav-link-item {
            display: inline-block;
        }
        .mobile-nav {
            display: none;
        }
        @media (max-width: 1023px) {
            .nav-desktop,
            .desktop-header-btn,
            .desktop-header-status {
                display: none !important;
            }
            .mobile-nav {
                display: block;
            }
        }
        .category-hero {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            padding: 54px 0 44px;
            background: linear-gradient(100deg, rgba(13,17,23,.92) 20%, rgba(13,17,23,.65) 70%), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            overflow: hidden;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            right: -40px;
            top: -30px;
            width: 320px;
            height: 260px;
            background: linear-gradient(135deg, transparent 32%, rgba(2,200,120,.22) 33%, transparent 54%, rgba(217,255,61,.12) 55%);
            clip-path: polygon(0 0, 100% 0, 100% 76%, 0 100%);
            pointer-events: none;
        }
        .crumb-breadcrumb {
            color: var(--text2);
            font-size: 13px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .crumb-breadcrumb a {
            color: var(--text2);
        }
        .crumb-breadcrumb a:hover {
            color: var(--volt);
        }
        .crumb-breadcrumb span {
            color: #fff;
        }

        .toolbar-scroll {
            position: sticky;
            top: 72px;
            z-index: 45;
            background: rgba(13,17,23,.88);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255,255,255,.06);
        }
        .cat-switch {
            display: flex;
            gap: 6px;
            user-select: none;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .cat-switch::-webkit-scrollbar {
            display: none;
        }
        .cat-switch a {
            position: relative;
            font-size: 14px;
            color: var(--text2);
            padding: 16px 14px 15px;
            white-space: nowrap;
            border-bottom: 2px solid transparent;
        }
        .cat-switch a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            transition: width .2s;
        }
        .cat-switch a:hover {
            color: #fff;
        }
        .cat-switch a.active {
            color: #fff;
            font-weight: 600;
        }
        .cat-switch a.active::after {
            width: 28px;
        }

        .article-row-card {
            display: flex;
            flex-direction: column;
            background: var(--bg800);
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,.05);
            overflow: hidden;
            transition: transform .2s cubic-bezier(.2,.8,.2,1), border-color .2s, box-shadow .2s;
            text-decoration: none;
        }
        .article-row-card:hover {
            transform: translateY(-4px);
            border-color: rgba(2,200,120,.35);
            box-shadow: var(--shadow-hover);
        }
        .article-row-card .row-cover {
            width: 100%;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            position: relative;
        }
        .article-row-card .row-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .35s;
        }
        .article-row-card:hover .row-cover img {
            transform: scale(1.06) rotate(1deg);
        }
        .news-tag {
            display: inline-flex;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(2,200,120,.12);
            color: var(--brand-lite);
            font-size: 12px;
            font-weight: 500;
        }
        .news-date-num {
            font-family: "DIN Alternate", "Arial Narrow", sans-serif;
            font-size: 30px;
            line-height: 1;
            color: var(--brand);
            font-weight: 700;
        }
        .service-card {
            background: var(--bg800);
            border: 1px solid rgba(255,255,255,.05);
            border-radius: 16px;
            padding: 26px 22px;
            height: 100%;
            transition: all .2s;
        }
        .service-card:hover {
            border-color: rgba(2,200,120,.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .cta-banner {
            position: relative;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            background: linear-gradient(135deg, rgba(2,200,120,.12), rgba(2,200,120,.04));
            background-color: rgba(255,255,255,.02);
            border: 1px solid rgba(2,200,120,.22);
            border-radius: 16px;
            padding: 28px 30px;
            overflow: hidden;
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            right: -70px;
            bottom: -80px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(2,200,120,.3), transparent 70%);
            pointer-events: none;
        }

        .faq-item {
            border: 1px solid rgba(255,255,255,.08);
            background: var(--bg800);
            border-radius: 12px;
            margin-bottom: 12px;
            transition: border-color .2s;
        }
        .faq-item:hover {
            border-color: rgba(2,200,120,.25);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 16px 18px;
            cursor: pointer;
            background: transparent;
            border: 0;
            color: var(--text1);
            font-size: 15px;
            font-weight: 500;
            text-align: left;
        }
        .faq-plus {
            position: relative;
            flex: 0 0 auto;
            width: 24px;
            height: 24px;
        }
        .faq-plus::before,
        .faq-plus::after {
            content: "";
            position: absolute;
            background: var(--brand-lite);
            border-radius: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            transition: all .24s;
        }
        .faq-plus::before {
            width: 12px;
            height: 2px;
        }
        .faq-plus::after {
            width: 2px;
            height: 12px;
        }
        .faq-item.open .faq-plus::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .24s ease;
        }
        .faq-answer p {
            padding: 0 18px 18px;
            color: var(--text2);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        .site-footer {
            background: #0A0E12;
            border-top: 1px dashed rgba(255,255,255,.12);
            margin-top: 40px;
        }
        .footer-link {
            display: block;
            color: var(--text3);
            font-size: 14px;
            padding: 5px 0;
        }
        .footer-link:hover {
            color: var(--volt);
        }

        .floating-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 50;
            border-radius: 999px;
            height: 48px;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: #07130C;
            font-weight: 700;
            padding: 0 20px;
            box-shadow: 0 8px 30px rgba(2,200,120,.3);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: opacity .3s, transform .3s;
            font-size: 14px;
        }
        .floating-cta.show {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .floating-cta .dot {
            width: 8px;
            height: 8px;
            background: #0A4C2F;
            border-radius: 99px;
            animation: breathe 1.6s infinite;
        }
        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
            .floating-cta span.text {
                display: none;
            }
            .floating-cta {
                width: 48px;
                padding: 0;
                justify-content: center;
            }
            .floating-cta .dot {
                display: none;
            }
        }

/* roulang page: article */
:root {
    --bg900: #0D1117;
    --bg800: #151C24;
    --bg700: #1E2832;
    --line: rgba(255, 255, 255, 0.08);
    --brand: #02C878;
    --brand-lite: #3CF2A7;
    --volt: #D9FF3D;
    --warn: #FFB800;
    --text1: #F2F7F2;
    --text2: #A7B3AE;
    --text3: #6C7A75;
    --header-h: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
    background: var(--bg900);
    color: var(--text1);
    line-height: 1.75;
    font-size: 16px;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

a,
button,
input,
textarea {
    transition: all 0.2s ease;
}

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

input,
textarea {
    font-family: inherit;
}

.container-site {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

@media (min-width: 768px) {
    .container-site {
        padding-left: 32px;
        padding-right: 32px;
    }
}

.font-num {
    font-family: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
}

/* header */
.site-header {
    position: sticky;
    top: 0;
    height: var(--header-h);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    z-index: 60;
}

.logo-mark {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand), var(--brand-lite));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 17px;
    color: #06120C;
    transform: skewX(-6deg);
    letter-spacing: -0.5px;
}

.nav-desktop {
    display: none;
    gap: 2rem;
    margin-left: 2rem;
}

@media (min-width: 1024px) {
    .nav-desktop {
        display: flex;
        gap: 2rem;
        margin-left: 2.5rem;
    }
}

.nav-link-item {
    position: relative;
    display: inline-block;
    padding: 6px 0 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text2);
    white-space: nowrap;
    line-height: 1.2;
}

.nav-link-item::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 4px;
    width: 0;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--brand), var(--volt));
    transition: width 0.25s ease;
}

.nav-link-item:hover {
    color: var(--volt);
}

.nav-link-item:hover::after {
    width: 100%;
}

.nav-link-item.active {
    color: var(--text1);
}

.nav-link-item.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: transparent;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

@media (min-width: 1024px) {
    .mobile-menu-btn,
    .mobile-drawer {
        display: none !important;
    }
}

.mobile-drawer {
    display: none;
    flex-direction: column;
    border-top: 1px solid var(--line);
    background: rgba(13, 17, 23, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.mobile-drawer.open {
    display: flex;
}

.mobile-drawer .drawer-link {
    display: block;
    padding: 13px 0;
    font-size: 16px;
    color: var(--text2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-weight: 500;
}

.mobile-drawer .drawer-link:hover {
    color: var(--volt);
}

.mobile-drawer .drawer-link.on {
    color: var(--text1);
    font-weight: 600;
}

.breathe-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--brand);
    flex-shrink: 0;
    animation: breathe 2s infinite;
}

@keyframes breathe {
    0% {
        box-shadow: 0 0 0 0 rgba(2, 200, 120, 0.55);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(2, 200, 120, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(2, 200, 120, 0);
    }
}

/* buttons */
.btn-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand);
    color: #06120C;
    font-weight: 700;
    border-radius: 8px;
    padding: 0 22px;
    height: 44px;
    font-size: 15px;
    overflow: hidden;
    white-space: nowrap;
}

.btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: -150%;
    height: 100%;
    width: 60%;
    background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    transform: skewX(-20deg);
    transition: left 0.55s ease;
}

.btn-primary:hover {
    background: var(--brand-lite);
}

.btn-primary:hover::after {
    left: 120%;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 22px;
    border-radius: 8px;
    color: var(--text1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: transparent;
    font-weight: 600;
    white-space: nowrap;
}

.btn-ghost:hover {
    border-color: var(--volt);
    color: var(--volt);
    background: rgba(217, 255, 61, 0.06);
}

:focus-visible {
    outline: 2px dashed var(--brand);
    outline-offset: 3px;
}

/* article-head */
.article-head {
    position: relative;
    overflow: hidden;
}

.article-head-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
}

.article-head-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, rgba(13, 17, 23, 0.96) 0%, rgba(13, 17, 23, 0.88) 60%, rgba(13, 17, 23, 0.62) 100%);
}

.breadcrumb-link {
    color: var(--text3);
    font-size: 14px;
    transition: color 0.2s;
}

.breadcrumb-link:hover {
    color: var(--brand-lite);
}

.badge-cat {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 15px;
    border-radius: 999px;
    background: rgba(2, 200, 120, 0.15);
    border: 1px solid rgba(2, 200, 120, 0.3);
    color: var(--brand-lite);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* body typography */
.article-shell {
    background: var(--bg800);
}

.article-card {
    background: #0D1117;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 28px 24px;
}

@media (min-width: 640px) {
    .article-card {
        padding: 40px 40px 36px;
    }
}

.article-body p {
    margin-bottom: 1.5em;
    color: #DFE7E2;
    font-size: 16px;
    line-height: 1.95;
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
    color: var(--text1);
    margin-bottom: 0.7em;
    line-height: 1.4;
}

.article-body h2 {
    font-size: 27px;
    font-weight: 700;
    margin-top: 1.8em;
    padding-left: 18px;
    position: relative;
}

.article-body h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.22em;
    width: 7px;
    height: 0.75em;
    background: var(--brand);
    border-radius: 4px;
}

.article-body h3 {
    font-size: 21px;
    font-weight: 600;
    margin-top: 1.4em;
    padding-left: 16px;
    position: relative;
}

.article-body h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 0;
    height: 0;
    border-left: 7px solid var(--brand-lite);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}

.article-body img {
    border-radius: 16px;
    width: 100%;
    height: auto;
    margin: 28px 0 18px;
    object-fit: cover;
}

.article-body blockquote {
    border-left: 5px solid var(--brand);
    background: rgba(2, 200, 120, 0.06);
    border-radius: 8px;
    padding: 18px 22px;
    margin: 24px 0;
    color: var(--text2);
}

.article-body blockquote p {
    margin-bottom: 0;
}

.article-body a {
    color: var(--brand-lite);
    text-decoration: underline;
    text-decoration-color: rgba(60, 242, 167, 0.35);
    text-underline-offset: 4px;
}

.article-body a:hover {
    text-decoration-color: var(--volt);
    color: var(--volt);
}

.article-body ul {
    margin: 18px 0 24px;
    padding-left: 24px;
}

.article-body ul li {
    margin-bottom: 10px;
    color: #DFE7E2;
    position: relative;
}

.article-body ul li::before {
    content: "";
    position: absolute;
    left: -18px;
    top: 0.6em;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--volt);
}

.article-body ol {
    margin: 18px 0 24px;
    padding-left: 24px;
    counter-reset: article-ol;
}

.article-body ol li {
    counter-increment: article-ol;
    margin-bottom: 10px;
    color: #DFE7E2;
    position: relative;
    padding-left: 28px;
}

.article-body ol li::before {
    content: counter(article-ol) ".";
    position: absolute;
    left: 0;
    color: var(--brand-lite);
    font-weight: 700;
    font-family: "DIN Alternate", "Bebas Neue", sans-serif;
}

/* feedback */
.help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 28px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: var(--text2);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.help-btn:hover {
    border-color: var(--brand);
    color: var(--brand-lite);
}

.help-btn.selected {
    background: rgba(2, 200, 120, 0.15);
    border-color: rgba(2, 200, 120, 0.4);
    color: var(--brand-lite);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text2);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    background: transparent;
}

.share-btn:hover {
    border-color: var(--brand-lite);
    color: var(--brand-lite);
    transform: translateY(-2px);
}

.related-card {
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg800);
    border: 1px solid var(--line);
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.related-card:hover {
    transform: translateY(-5px);
    border-color: rgba(2, 200, 120, 0.35);
    box-shadow: 0 16px 40px rgba(2, 200, 120, 0.16);
}

.related-card .img-zoom {
    overflow: hidden;
}

.related-card:hover .img-zoom img {
    transform: scale(1.06) rotate(1deg);
}

.related-card .img-zoom img {
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.small-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(2, 200, 120, 0.13);
    color: var(--brand-lite);
    font-weight: 600;
}

/* floating cta */
.floating-cta {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 50;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--brand);
    color: #06120C;
    font-weight: 700;
    padding: 0 22px;
    height: 48px;
    border-radius: 48px;
    font-size: 15px;
    box-shadow: 0 8px 30px rgba(2, 200, 120, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px);
    transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.floating-cta.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.floating-cta:hover {
    background: var(--brand-lite);
    transform: translateY(-2px);
}

.floating-cta .pulse {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #06120C;
    position: relative;
}

.floating-cta .pulse::after {
    content: "";
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    border: 1px solid rgba(6, 18, 12, 0.4);
    animation: cta-pulse 2s infinite;
}

@keyframes cta-pulse {
    0% {
        transform: scale(0.6);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@media (max-width: 640px) {
    .floating-cta {
        width: 48px;
        padding: 0;
        justify-content: center;
    }
    .floating-cta span.cta-label {
        display: none;
    }
}

/* article page empty */
.empty-article-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 18px;
    border-radius: 24px;
    background: var(--bg700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    color: var(--text3);
}

/* site-footer */
.site-footer {
    background: #0A0E12;
    border-top: 1px dashed rgba(255, 255, 255, 0.12);
    margin-top: 16px;
}

.footer-link {
    display: block;
    color: var(--text3);
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-link:hover {
    color: var(--brand-lite);
    padding-left: 4px;
}

/* divisions */
.section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--brand-lite);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.deco-line {
    width: 30px;
    height: 2px;
    background: var(--volt);
}

/* responsive table helper */
.table-scroll {
    overflow-x: auto;
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* roulang page: category2 */
:root {
  --bg900: #0D1117;
  --bg800: #151C24;
  --bg700: #1E2832;
  --line: rgba(255,255,255,0.08);
  --brand: #02C878;
  --brand-lite: #3CF2A7;
  --volt: #D9FF3D;
  --warn: #FFB800;
  --text1: #F2F7F2;
  --text2: #A7B3AE;
  --text3: #6C7A75;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-brand: 0 16px 40px rgba(2,200,120,0.18);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background-color: var(--bg900);
  color: var(--text1);
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img {
  display: block;
  max-width: 100%;
}
button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}
input, select {
  font-family: inherit;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color .2s;
}
:focus-visible {
  outline: 2px dashed var(--brand);
  outline-offset: 3px;
}
::selection {
  background: var(--volt);
  color: #0D1117;
}
.font-num {
  font-family: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
}
.container-site {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 32px;
  padding-right: 32px;
}
@media (max-width: 640px) {
  .container-site {
    padding-left: 20px;
    padding-right: 20px;
  }
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  background: rgba(13,17,23,0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.logo-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  background: linear-gradient(145deg, var(--brand), var(--volt));
  color: #0D1117;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  transform: skewX(-6deg);
  letter-spacing: -0.5px;
}
.nav-desktop {
  position: relative;
}
.nav-link-item {
  position: relative;
  color: var(--text2);
  font-size: 15px;
  padding: 14px 2px;
  letter-spacing: .3px;
  white-space: nowrap;
}
.nav-link-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 6px;
  height: 3px;
  width: 0;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand), var(--volt));
  transition: width .25s cubic-bezier(.2,.8,.2,1);
}
.nav-link-item.active,
.nav-link-item:hover {
  color: var(--text1);
}
.nav-link-item.active::after,
.nav-link-item:hover::after {
  width: 100%;
}
.breathe-dot {
  width: 6px;
  height: 6px;
  background: var(--brand);
  border-radius: 999px;
  display: inline-block;
  animation: breathe 2s infinite ease-in-out;
}
@keyframes breathe {
  0%, 100% { opacity: 0.4; transform: scale(0.75); }
  50% { opacity: 1; transform: scale(1.1); }
}
.btn-primary {
  height: 44px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--brand);
  color: #0D1117;
  font-weight: 700;
  font-size: 15px;
  border-radius: 8px;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: background .2s, transform .2s, box-shadow .2s;
}
.btn-primary:hover {
  background: var(--brand-lite);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(60,242,167,0.18);
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 40%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.5), transparent);
  transform: skewX(-20deg);
  transition: left .5s;
}
.btn-primary:hover::after {
  left: 130%;
}
.btn-ghost {
  height: 44px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: border-color .2s, color .2s, transform .2s;
}
.btn-ghost:hover {
  border-color: var(--brand-lite);
  color: var(--brand-lite);
  transform: translateY(-1px);
}
.mobile-nav {
  display: none;
}
.site-footer {
  background: #0A0E12;
  border-top: 1px dashed rgba(255,255,255,0.14);
  margin-top: 0;
}
.footer-link {
  display: block;
  color: var(--text3);
  font-size: 14px;
  padding: 7px 0;
  transition: color .2s, padding-left .2s;
}
.footer-link:hover {
  color: var(--brand-lite);
  padding-left: 4px;
}
@media (max-width: 991px) {
  .desktop-header-btn,
  .site-header .text-xs,
  .site-header > .container-site > .flex .nav-link-item {
    display: none !important;
  }
  .site-header > .container-site > .flex.items-center.gap-5 {
    margin-left: auto;
  }
  .mobile-nav {
    display: block;
  }
  #mobileDrawer.mobile-nav {
    display: none;
  }
  #mobileDrawer.mobile-nav.open {
    display: block;
  }
}
@media (max-width: 767px) {
  .site-header {
    height: auto;
    min-height: 68px;
  }
}
@media (min-width: 992px) {
  #mobileMenuBtn {
    display: none;
  }
}
.cat-hero {
  position: relative;
  background: linear-gradient(135deg, #0D1117 0%, #122118 54%, #0D1117 100%);
  padding: 76px 0 64px;
  overflow: hidden;
}
.cat-hero:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(115deg, rgba(13,17,23,0.8) 20%, rgba(13,17,23,0.7) 55%, rgba(13,17,23,0.92) 100%), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
}
.cat-hero:after {
  content: "";
  position: absolute;
  right: -160px;
  top: -60px;
  width: 420px;
  height: 420px;
  background: repeating-linear-gradient(115deg, transparent 0 18px, rgba(60,242,167,0.05) 18px 20px);
  transform: rotate(6deg);
}
.cat-hero .container-site {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  font-size: 13px;
  color: var(--text3);
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 18px;
}
.breadcrumb a:hover {
  color: var(--brand-lite);
}
.breadcrumb .current {
  color: var(--text2);
  pointer-events: none;
}
.cat-title-main {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 1px;
}
.cat-title-main span {
  background: linear-gradient(120deg, var(--brand), var(--brand-lite));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cat-hero-sub {
  margin-top: 14px;
  font-size: 15px;
  color: var(--text2);
  max-width: 640px;
}
.badge-pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(217,255,61,0.24);
  background: rgba(217,255,61,0.06);
  color: var(--volt);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}
@media (max-width: 768px) {
  .cat-hero {
    padding: 52px 0 48px;
  }
  .cat-title-main {
    font-size: 30px;
  }
}
.cat-switchbar {
  position: sticky;
  top: 72px;
  z-index: 30;
  background: rgba(21,28,36,0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.switchbar-inner {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.cat-group-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  overflow-x: auto;
}
.cat-group-link {
  position: relative;
  white-space: nowrap;
  font-size: 15px;
  color: var(--text3);
  padding: 18px 0 14px;
  transition: color .2s;
}
.cat-group-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 3px;
  background: var(--brand);
  transform: scaleX(0);
  transition: transform .2s;
  border-radius: 6px 6px 0 0;
}
.cat-group-link:hover,
.cat-group-link.active {
  color: var(--text1);
}
.cat-group-link.active::after {
  transform: scaleX(1);
}
.sort-control {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
}
.sort-btn {
  padding: 5px 14px;
  font-size: 13px;
  color: var(--text3);
  border-radius: 999px;
  transition: all .2s;
}
.sort-btn.active {
  background: rgba(2,200,120,0.12);
  color: var(--brand-lite);
}
@media (max-width: 640px) {
  .cat-switchbar {
    top: 62px;
  }
  .switchbar-inner {
    min-height: 52px;
    align-items: center;
  }
  .cat-group-nav {
    gap: 18px;
  }
  .sort-btn {
    padding: 4px 10px;
  }
}
.section-block {
  padding: 88px 0;
}
@media (max-width: 768px) {
  .section-block {
    padding: 60px 0;
  }
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--brand-lite);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.kicker:before {
  content: "";
  width: 24px;
  height: 3px;
  background: var(--brand-lite);
  display: inline-block;
  border-radius: 4px;
}
.block-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .2px;
}
.block-desc {
  color: var(--text2);
  font-size: 16px;
  margin-top: 12px;
  max-width: 620px;
}
@media (max-width: 768px) {
  .block-title {
    font-size: 28px;
  }
  .block-desc {
    font-size: 15px;
  }
}
.tr-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 24px;
}
@media (max-width: 1024px) {
  .tr-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
}
@media (max-width: 640px) {
  .tr-grid {
    grid-template-columns: 1fr;
  }
}
.feed-card {
  background: var(--bg800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s cubic-bezier(.2,.8,.2,1), box-shadow .2s, border-color .2s;
}
.feed-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-brand);
  border-color: rgba(2,200,120,0.35);
}
.feed-card-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg700);
}
.feed-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.feed-card:hover .feed-card-media img {
  transform: scale(1.08) rotate(1.2deg);
}
.feed-card-body {
  padding: 18px 20px 20px;
}
.badge-cat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(2,200,120,0.12);
  border: 1px solid rgba(2,200,120,0.3);
  color: var(--brand-lite);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  line-height: 1.7;
}
.feed-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin: 12px 0 8px;
  color: var(--text1);
  transition: color .2s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.feed-card:hover .feed-title {
  color: var(--brand-lite);
}
.feed-excerpt {
  color: var(--text3);
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.feed-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text3);
  font-size: 13px;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}
.read-more {
  color: var(--brand-lite);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .2s;
}
.read-more:hover {
  gap: 8px;
}
.pagination-wrap {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 48px;
}
.page-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--text2);
  background: var(--bg800);
  font-size: 15px;
  font-weight: 500;
  transition: all .2s;
}
.page-btn:hover {
  border-color: rgba(2,200,120,0.3);
  color: var(--text1);
}
.page-btn.active {
  background: var(--brand);
  color: #0D1117;
  border-color: var(--brand);
  font-weight: 700;
}
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 24px;
}
@media (max-width: 992px) {
  .step-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
}
@media (max-width: 640px) {
  .step-grid {
    grid-template-columns: 1fr;
  }
}
.step-card {
  background: linear-gradient(180deg, var(--bg800), #121A21);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px 28px;
  position: relative;
  overflow: hidden;
  height: 100%;
  transition: border-color .2s, transform .2s;
}
.step-card:hover {
  border-color: rgba(2,200,120,0.35);
  transform: translateY(-4px);
}
.step-num {
  font-size: 72px;
  line-height: 1;
  font-weight: 800;
  color: rgba(255,255,255,0.04);
  user-select: none;
  position: absolute;
  top: 16px;
  right: 16px;
}
.step-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(2,200,120,0.16);
  color: var(--brand-lite);
  border-radius: 16px;
  margin-bottom: 18px;
}
.step-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-card p {
  color: var(--text2);
  font-size: 15px;
}
.feature-mini-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
}
@media (max-width: 992px) {
  .feature-mini-list {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
}
@media (max-width: 640px) {
  .feature-mini-list {
    grid-template-columns: 1fr;
  }
}
.mini-feature {
  background: var(--bg800);
  border-left: 4px solid var(--brand);
  border-radius: 14px;
  padding: 24px;
  height: 100%;
  transition: transform .2s, background .2s;
}
.mini-feature:hover {
  background: var(--bg700);
  transform: translateY(-3px);
}
.mini-feature h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.mini-feature p {
  color: var(--text3);
  font-size: 14px;
  line-height: 1.7;
}
.cta-band {
  position: relative;
  background: radial-gradient(ellipse at 25% 20%, rgba(2,200,120,0.14), transparent 42%), radial-gradient(ellipse at 80% 70%, rgba(217,255,61,0.05), transparent 38%);
  background-color: #111820;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 72px 0;
}
@media (max-width: 768px) {
  .cta-band {
    padding: 52px 0;
  }
}
.faq-panel {
  display: grid;
  grid-template-columns: minmax(0,4fr) minmax(0,8fr);
  gap: 48px;
  align-items: start;
}
@media (max-width: 992px) {
  .faq-panel {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}
.faq-left {
  position: sticky;
  top: 150px;
}
.faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background .2s;
}
.faq-item:first-child {
  border-top: 1px solid var(--line);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  padding: 18px 0;
  font-size: 16px;
  color: var(--text1);
  font-weight: 500;
  line-height: 1.6;
}
.faq-icon {
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 16px;
  font-size: 20px;
  line-height: 1;
  font-weight: 300;
  color: var(--text2);
  transition: transform .25s, color .25s, border-color .25s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--brand-lite);
  border-color: rgba(2,200,120,0.45);
}
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .3s ease;
}
.faq-item.open .faq-a {
  grid-template-rows: 1fr;
}
.faq-a-inner {
  overflow: hidden;
}
.faq-a-inner p {
  color: var(--text2);
  font-size: 15px;
  padding-bottom: 20px;
  max-width: 680px;
}
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-lite));
  color: #0D1117;
  font-weight: 700;
  font-size: 14px;
  padding: 13px 20px;
  border-radius: 999px;
  box-shadow: 0 10px 28px rgba(3,120,70,0.3);
  opacity: 0;
  transform: translateY(30px);
  pointer-events: none;
  transition: opacity .3s, transform .3s;
}
.float-cta.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.float-cta .dot {
  width: 7px;
  height: 7px;
  background: #0D1117;
  border-radius: 50%;
  animation: breathe 2s infinite;
}
@media (max-width: 640px) {
  .float-cta {
    padding: 15px;
    width: auto;
  }
  .float-cta .cta-text {
    display: none;
  }
}
.feature-strip {
  background: linear-gradient(90deg, rgba(2,200,120,0.1), rgba(217,255,61,0.04));
}

/* roulang page: category3 */
:root {
            --bg900: #0D1117;
            --bg800: #151C24;
            --bg700: #1E2832;
            --line: rgba(255, 255, 255, 0.08);
            --brand: #02C878;
            --brand-lite: #3CF2A7;
            --volt: #D9FF3D;
            --warn: #FFB800;
            --text1: #F2F7F2;
            --text2: #A7B3AE;
            --text3: #6C7A75;
            --radius-card: 16px;
            --radius-btn: 8px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg900);
            color: var(--text1);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body,
        button,
        input,
        textarea {
            font-family: var(--font-sans);
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            border: 0;
            background: transparent;
            cursor: pointer;
        }

        input {
            border: 0;
            background: transparent;
        }

        :focus-visible {
            outline: 2px dashed var(--brand);
            outline-offset: 3px;
        }

        ::selection {
            background: rgba(2, 200, 120, 0.25);
            color: #ffffff;
        }

        .font-num {
            font-family: var(--font-num);
        }

        .container-site {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }

        .no-scrollbar {
            scrollbar-width: none;
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            height: 72px;
            background: rgba(13, 17, 23, 0.86);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand);
            color: #06231a;
            font-weight: 800;
            font-size: 17px;
            letter-spacing: 0.5px;
            border-radius: 12px 12px 12px 3px;
            box-shadow: 0 6px 16px rgba(2, 200, 120, 0.24);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-desktop .nav-link {
            position: relative;
            padding: 6px 2px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text2);
            white-space: nowrap;
            transition: color 200ms ease;
        }

        .nav-desktop .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -3px;
            height: 3px;
            width: 0%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--brand), var(--volt));
            transition: width 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
        }

        .nav-desktop .nav-link:hover,
        .nav-desktop .nav-link.active {
            color: #ffffff;
        }

        .nav-desktop .nav-link:hover::after,
        .nav-desktop .nav-link.active::after {
            width: 100%;
        }

        .header-login {
            font-size: 14px;
            color: var(--text2);
            transition: color 180ms ease;
        }

        .header-login:hover {
            color: var(--volt);
        }

        .status-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 12px;
            color: var(--text2);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 5px 12px;
        }

        .breathe-dot {
            width: 8px;
            height: 8px;
            display: inline-block;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 0 0 rgba(2, 200, 120, 0.4);
            animation: breathe 2s infinite ease-out;
        }

        @keyframes breathe {
            0% {
                box-shadow: 0 0 0 0 rgba(2, 200, 120, 0.4);
            }
            70% {
                box-shadow: 0 0 0 8px rgba(2, 200, 120, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(2, 200, 120, 0);
            }
        }

        .mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            transition: background 180ms ease;
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-drawer {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 55;
            background: rgba(13, 17, 23, 0.97);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        @media (max-width: 767px) {
            .nav-desktop,
            .header-actions {
                display: none !important;
            }

            .mobile-toggle {
                display: flex;
            }

            .mobile-drawer.open {
                display: block;
            }
        }

        /* ========== Buttons ========== */
        .btn-primary,
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            height: 48px;
            padding: 0 22px;
            border-radius: var(--radius-btn);
            transition: all 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
            white-space: nowrap;
        }

        .btn-primary {
            position: relative;
            overflow: hidden;
            background: var(--brand);
            color: #06231a;
            box-shadow: 0 8px 20px rgba(2, 200, 120, 0.2);
        }

        .btn-primary::after {
            content: "";
            position: absolute;
            top: 0;
            left: -80%;
            width: 45%;
            height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
            transform: skewX(-24deg);
            opacity: 0;
            pointer-events: none;
        }

        .btn-primary:hover {
            background: var(--brand-lite);
            box-shadow: 0 12px 26px rgba(2, 200, 120, 0.28);
            transform: translateY(-1px);
        }

        .btn-primary:hover::after {
            animation: sweep 600ms ease;
        }

        @keyframes sweep {
            0% {
                left: -80%;
                opacity: 1;
            }
            60% {
                left: 60%;
                opacity: 0.6;
            }
            100% {
                left: 120%;
                opacity: 0;
            }
        }

        .btn-outline {
            border: 1px solid rgba(2, 200, 120, 0.45);
            color: var(--brand-lite);
            background: rgba(2, 200, 120, 0.04);
        }

        .btn-outline:hover {
            border-color: var(--volt);
            color: var(--volt);
            background: rgba(2, 200, 120, 0.08);
            transform: translateY(-1px);
        }

        .btn-lg {
            height: 56px;
            padding: 0 28px;
            font-size: 16px;
        }

        .text-link {
            color: var(--brand-lite);
            background-image: linear-gradient(90deg, var(--brand-lite), var(--volt));
            background-repeat: no-repeat;
            background-position: 0 100%;
            background-size: 0% 1px;
            transition: background-size 200ms ease, color 200ms ease;
        }

        .text-link:hover {
            background-size: 100% 1px;
            color: #ffffff;
        }

        /* ========== Category hero ========== */
        .category-hero {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            background:
                linear-gradient(110deg, rgba(13, 17, 23, 0.97) 12%, rgba(21, 28, 36, 0.88) 58%, rgba(2, 200, 120, 0.2) 100%),
                url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(13, 17, 23, 0.82) 100%);
            z-index: 0;
            pointer-events: none;
        }

        .category-hero .container-site {
            position: relative;
            z-index: 2;
            padding-top: 70px;
            padding-bottom: 52px;
        }

        .hero-pattern-lines {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            background: repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.025) 0px, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 16px);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text2);
        }

        .breadcrumb a {
            color: var(--text2);
            transition: color 160ms ease;
        }

        .breadcrumb a:hover {
            color: var(--brand-lite);
        }

        .breadcrumb span {
            color: var(--text3);
        }

        .breadcrumb .current {
            color: #fff;
        }

        .hero-title {
            font-size: clamp(36px, 5.6vw, 56px);
            line-height: 1.12;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin: 18px 0 14px;
        }

        .hero-title .dot-green {
            display: inline-block;
            width: 12px;
            height: 12px;
            margin-left: 4px;
            border-radius: 3px;
            background: var(--volt);
            transform: rotate(45deg);
        }

        .hero-sub {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text2);
            max-width: 560px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--brand-lite);
            padding-left: 14px;
            border-left: 3px solid var(--volt);
        }

        .hero-note {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            padding: 10px 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text2);
            font-size: 13px;
            backdrop-filter: blur(8px);
        }

        /* ========== Category switch ========== */
        .cat-subnav {
            position: sticky;
            top: 72px;
            z-index: 45;
            background: rgba(13, 17, 23, 0.93);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .cat-tabs {
            display: flex;
            align-items: center;
            gap: 22px;
            overflow-x: auto;
            padding-top: 8px;
            padding-bottom: 8px;
        }

        .cat-tab {
            position: relative;
            flex-shrink: 0;
            padding: 12px 2px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text2);
            white-space: nowrap;
            transition: color 180ms ease;
        }

        .cat-tab::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            height: 3px;
            width: 0%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--brand), var(--volt));
            transition: width 220ms ease;
        }

        .cat-tab:hover {
            color: var(--volt);
        }

        .cat-tab.active {
            color: #fff;
        }

        .cat-tab.active::after {
            width: 100%;
        }

        .cat-extra {
            margin-left: auto;
            font-size: 13px;
            color: var(--text3);
            white-space: nowrap;
        }

        /* ========== Section spacing ========== */
        .section-space {
            padding-top: 64px;
            padding-bottom: 64px;
        }

        @media (min-width: 1024px) {
            .section-space {
                padding-top: 96px;
                padding-bottom: 96px;
            }
        }

        .section-header {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin: 10px 0 0;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text2);
            max-width: 680px;
        }

        @media (min-width: 768px) {
            .section-header {
                flex-direction: row;
                align-items: flex-end;
                justify-content: space-between;
                gap: 24px;
            }
            .section-header h2 {
                font-size: 36px;
            }
        }

        /* ========== Service rows ========== */
        .cat-row-card {
            display: grid;
            grid-template-columns: 1fr;
            gap: 18px;
            padding: 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(21, 28, 36, 0.94), rgba(21, 28, 36, 0.78));
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            transition: transform 200ms cubic-bezier(0.2, 0.8, 0.2, 1), border-color 200ms ease, box-shadow 200ms ease;
        }

        .cat-row-card:hover {
            transform: translateY(-4px);
            border-color: rgba(2, 200, 120, 0.35);
            box-shadow: 0 16px 40px rgba(2, 200, 120, 0.14);
        }

        .cat-row-cover {
            position: relative;
            overflow: hidden;
            border-radius: 14px;
            min-height: 200px;
            background: var(--bg800);
        }

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

        .cat-row-card:hover .cat-row-cover img {
            transform: scale(1.05) rotate(1.5deg);
        }

        .cat-row-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 4px 6px 6px;
        }

        .cat-tag {
            display: inline-flex;
            align-items: center;
            width: fit-content;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-lite);
            background: rgba(2, 200, 120, 0.1);
            border: 1px solid rgba(2, 200, 120, 0.18);
            border-radius: 999px;
            padding: 4px 12px;
            letter-spacing: 0.5px;
        }

        .cat-row-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin: 14px 0 8px;
            color: #fff;
            transition: color 180ms ease;
        }

        .cat-row-card:hover .cat-row-content h3 {
            color: var(--brand-lite);
        }

        .cat-row-content p {
            font-size: 15px;
            color: var(--text2);
            line-height: 1.8;
            margin: 0 0 18px;
        }

        .cat-row-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: auto;
            font-size: 13px;
            color: var(--text3);
        }

        .cat-row-meta time {
            color: var(--text3);
        }

        .cat-row-meta .sep {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--text3);
            opacity: 0.5;
        }

        .row-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--brand-lite);
            font-weight: 500;
        }

        .row-link span {
            transition: transform 180ms ease;
        }

        .cat-row-card:hover .row-link span {
            transform: translateX(5px);
        }

        @media (min-width: 768px) {
            .cat-row-card {
                grid-template-columns: 260px 1fr;
                gap: 24px;
                min-height: 200px;
            }
            .cat-row-cover {
                min-height: auto;
            }
        }

        /* ========== Feature cards ========== */
        .feature-card {
            position: relative;
            padding: 26px 24px 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-left: 4px solid var(--brand);
            border-radius: var(--radius-card);
            background: var(--bg800);
            transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(2, 200, 120, 0.28);
            box-shadow: 0 14px 34px rgba(2, 200, 120, 0.12);
        }

        .feature-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(2, 200, 120, 0.1);
            color: var(--brand-lite);
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 8px;
            color: #fff;
        }

        .feature-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text2);
            margin: 0;
        }

        @media (min-width: 1024px) {
            .feature-card h3 {
                font-size: 20px;
            }
        }

        /* ========== Scene cards ========== */
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }

        @media (min-width: 768px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1100px) {
            .scene-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .scene-card {
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            overflow: hidden;
            background: var(--bg800);
            transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            border-color: rgba(2, 200, 120, 0.32);
            box-shadow: 0 16px 40px rgba(2, 200, 120, 0.12);
        }

        .scene-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg700);
        }

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

        .scene-card:hover .scene-cover img {
            transform: scale(1.06) rotate(1.2deg);
        }

        .scene-card-body {
            padding: 20px;
        }

        .scene-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 8px;
        }

        .scene-card-body p {
            font-size: 14px;
            color: var(--text2);
            margin: 0 0 12px;
            line-height: 1.75;
        }

        .scene-note {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            color: var(--brand-lite);
        }

        /* ========== Steps ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 22px;
        }

        @media (min-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .step-card {
            position: relative;
            background: var(--bg800);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 28px 22px 24px;
            transition: border-color 200ms ease, transform 200ms ease;
        }

        .step-card:hover {
            border-color: rgba(2, 200, 120, 0.3);
            transform: translateY(-4px);
        }

        .step-number {
            display: flex;
            align-items: flex-end;
            gap: 10px;
            margin-bottom: 16px;
        }

        .step-number span {
            font-family: var(--font-num);
            font-weight: 600;
            font-size: 58px;
            line-height: 0.9;
            color: rgba(255, 255, 255, 0.1);
        }

        .step-number i {
            display: block;
            width: 26px;
            height: 3px;
            background: linear-gradient(90deg, var(--brand), var(--volt));
            border-radius: 999px;
            margin-bottom: 9px;
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text2);
            margin: 0;
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-panel {
            position: relative;
            overflow: hidden;
            border-radius: 24px;
            background:
                radial-gradient(circle at 88% 0%, rgba(2, 200, 120, 0.22), transparent 56%),
                linear-gradient(112deg, #151C24, #1E2832 55%, #17281F);
            border: 1px solid rgba(2, 200, 120, 0.25);
            padding: 40px 28px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 28px;
        }

        @media (min-width: 768px) {
            .cta-panel {
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                padding: 52px 60px;
            }
        }

        .cta-panel h2 {
            font-size: 28px;
            line-height: 1.3;
            font-weight: 700;
            margin: 0 0 10px;
        }

        @media (min-width: 1024px) {
            .cta-panel h2 {
                font-size: 34px;
            }
        }

        .cta-panel p {
            font-size: 15px;
            color: var(--text2);
            margin: 0;
        }

        .cta-cover {
            position: absolute;
            right: -60px;
            bottom: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(2, 200, 120, 0.08);
            filter: blur(20px);
            pointer-events: none;
        }

        /* ========== FAQ ========== */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }

        @media (min-width: 1024px) {
            .faq-layout {
                grid-template-columns: 360px 1fr;
                gap: 64px;
            }
        }

        .faq-sticky {
            position: sticky;
            top: 140px;
            align-self: start;
        }

        .faq-group {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-row {
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            background: var(--bg800);
            overflow: hidden;
            transition: border-color 200ms ease, background 200ms ease;
        }

        .faq-row.is-open {
            border-color: rgba(2, 200, 120, 0.3);
            background: rgba(21, 28, 36, 0.98);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 500;
            color: #fff;
            line-height: 1.5;
        }

        .faq-icon {
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            border-radius: 50%;
            font-size: 20px;
            font-weight: 400;
            color: var(--brand);
            background: rgba(2, 200, 120, 0.12);
            transition: transform 200ms ease, background 200ms ease;
        }

        .faq-row.is-open .faq-icon {
            transform: rotate(45deg);
            background: rgba(2, 200, 120, 0.22);
        }

        .faq-answer {
            max-height: 0;
            padding: 0 20px;
            overflow: hidden;
            color: var(--text2);
            font-size: 14px;
            line-height: 1.8;
            transition: max-height 240ms ease, padding 240ms ease;
        }

        .faq-row.is-open .faq-answer {
            max-height: 320px;
            padding-bottom: 20px;
        }

        .faq-footer-card {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-top: 20px;
            padding: 18px 20px;
            border: 1px dashed rgba(255, 255, 255, 0.14);
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-footer-card p {
            color: var(--text2);
            font-size: 14px;
            margin: 0;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0A0E12;
            border-top: 1px dashed rgba(255, 255, 255, 0.12);
        }

        .footer-link {
            display: block;
            font-size: 14px;
            color: var(--text3);
            margin-bottom: 10px;
            transition: color 180ms ease, padding-left 180ms ease;
        }

        .footer-link:hover {
            color: var(--brand-lite);
            padding-left: 4px;
        }

        /* ========== Floating CTA ========== */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 50;
            display: flex;
            align-items: center;
            gap: 10px;
            border-radius: 999px;
            padding: 0 20px;
            height: 52px;
            background: var(--brand);
            color: #06231a;
            font-weight: 600;
            font-size: 15px;
            box-shadow: 0 12px 32px rgba(2, 200, 120, 0.35);
            transform: translateY(80px);
            opacity: 0;
            visibility: hidden;
            transition: transform 400ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 300ms ease, visibility 300ms ease;
        }

        .float-cta.visible {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }

        .float-cta:hover {
            background: var(--brand-lite);
        }

        .float-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #06231a;
            position: relative;
        }

        .float-dot::after {
            content: "";
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            background: rgba(6, 35, 26, 0.25);
            animation: breathe 2s infinite;
        }

        @media (max-width: 640px) {
            .float-cta {
                padding: 0 18px;
                height: 48px;
                font-size: 14px;
            }
        }

/* roulang page: category4 */
:root {
  --bg900: #0D1117;
  --bg800: #151C24;
  --bg700: #1E2832;
  --line: rgba(255,255,255,0.08);
  --brand: #02C878;
  --brand-lite: #3CF2A7;
  --volt: #D9FF3D;
  --warn: #FFB800;
  --text1: #F2F7F2;
  --text2: #A7B3AE;
  --text3: #6C7A75;
  --radius-card: 16px;
  --radius-btn: 8px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 40px rgba(2,200,120,0.18);
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg900);
  color: var(--text1);
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Source Han Sans SC", sans-serif;
  line-height: 1.75;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}
* {
  box-sizing: border-box;
}
body, div, section, main, header, footer, nav, ul, ol, li, p, h1, h2, h3, h4, h5, form, input, button {
  box-sizing: border-box;
}
a {
  color: var(--brand-lite);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--volt);
}
img {
  display: block;
  max-width: 100%;
}
button, input {
  font: inherit;
  border: none;
  outline: none;
}
:focus-visible {
  outline: 2px dashed var(--brand);
  outline-offset: 3px;
}
.container-site {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 1024px) {
  .container-site {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 72px;
  background: rgba(13,17,23,0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.logo-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 800;
  color: #07130d;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), var(--volt));
  transform: skewX(-6deg);
}
.nav-link-item {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  color: var(--text2);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
}
.nav-link-item::after {
  content: "";
  display: block;
  width: 0;
  height: 3px;
  margin-top: 4px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand), var(--volt));
  transition: width 0.3s cubic-bezier(0.2,0.8,0.2,1);
}
.nav-link-item:hover {
  color: var(--volt);
}
.nav-link-item:hover::after,
.nav-link-item.active::after {
  width: 100%;
}
.nav-link-item.active {
  color: var(--text1);
}
.header-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text2);
  font-size: 12px;
}
.breathe-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-lite);
  position: relative;
  flex: 0 0 auto;
  animation: breathe 2s infinite;
}
@keyframes breathe {
  0%,100% { box-shadow: 0 0 0 0 rgba(60,242,167,0.5); opacity: 1; }
  50% { box-shadow: 0 0 0 6px rgba(60,242,167,0); opacity: 0.7; }
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, var(--brand), #00a860);
  color: #07130d;
  font-weight: 700;
  font-size: 15px;
  transition: transform 0.2s cubic-bezier(0.2,0.8,0.2,1), box-shadow 0.2s ease, background 0.2s ease;
  box-shadow: 0 4px 20px rgba(2,200,120,0.16);
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--brand-lite);
  color: #07130d;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(60,242,167,0.22);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(60,242,167,0.5);
  color: var(--brand-lite);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s ease;
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--volt);
  color: var(--volt);
  transform: translateY(-2px);
}
.mobile-drawer {
  display: none;
  background: rgba(13,17,23,0.98);
  border-bottom: 1px solid var(--line);
}
.mobile-drawer.open {
  display: block;
}
.mobile-drawer a {
  display: block;
  padding: 10px 4px;
  color: var(--text2);
  font-size: 15px;
}
.mobile-drawer a:hover,
.mobile-drawer a.active {
  color: var(--brand-lite);
}

/* Category hero */
.category-hero {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(to bottom, rgba(13,17,23,0.72), rgba(13,17,23,0.95)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  overflow: hidden;
  padding: 80px 0 56px;
}
.category-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(120deg, transparent 0 26px, rgba(255,255,255,0.02) 26px 28px);
}
.category-hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
}
.crumb {
  font-size: 13px;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.crumb a {
  color: var(--text2);
}
.crumb a:hover {
  color: var(--brand-lite);
}
.crumb span {
  color: var(--text3);
}
.cat-hero-title {
  font-size: clamp(36px, 6vw, 58px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.5px;
  margin: 0 0 16px;
  color: var(--text1);
}
.cat-hero-title::after {
  content: "";
  display: block;
  width: 88px;
  height: 4px;
  margin-top: 16px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--volt));
}
.cat-hero-sub {
  font-size: 17px;
  color: var(--text2);
  max-width: 560px;
  margin: 0;
}
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(21,28,36,0.86);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text2);
  font-size: 13px;
  margin-top: 20px;
}

/* Category tabbar */
.category-tabs {
  background: rgba(21,28,36,0.96);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 72px;
  z-index: 30;
  backdrop-filter: blur(8px);
}
.category-tabs-inner {
  display: flex;
  gap: 28px;
  overflow-x: auto;
}
.tab-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 60px;
  padding: 0 2px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text2);
  white-space: nowrap;
  transition: color 0.2s ease;
}
.tab-link:hover {
  color: var(--volt);
}
.tab-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--brand), var(--volt));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.tab-link.is-active {
  color: var(--text1);
  font-weight: 700;
}
.tab-link.is-active::after {
  transform: scaleX(1);
}
.tab-link.is-active::before {
  content: "";
  position: absolute;
  top: 20px;
  left: -18px;
  width: 7px;
  height: 7px;
  background: var(--volt);
  border-radius: 50%;
  opacity: 0.7;
}

/* Section spacing */
.section-block {
  padding: 96px 0;
}
@media (max-width: 768px) {
  .section-block {
    padding: 64px 0;
  }
}
.section-head {
  margin-bottom: 48px;
}
.overline-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.overline-label::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--brand);
  opacity: 0.7;
}
.overline-label.volt-label {
  color: var(--volt);
}
.overline-label.volt-label::before {
  background: var(--volt);
}
.section-title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 12px;
  letter-spacing: -0.3px;
}
.section-desc {
  color: var(--text2);
  font-size: 16px;
  max-width: 640px;
  margin: 0;
}

/* Card grid for category 4 */
.service-card {
  display: flex;
  flex-direction: column;
  background: var(--bg800);
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform 0.2s cubic-bezier(0.2,0.8,0.2,1), box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: var(--shadow-card);
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2,200,120,0.35);
  box-shadow: var(--shadow-hover);
}
.service-card-media {
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--bg700);
}
.service-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.service-card:hover .service-card-media img {
  transform: scale(1.06) rotate(1deg);
}
.service-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 18px 18px 20px;
}
.card-cat {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(2,200,120,0.12);
  color: var(--brand-lite);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}
.service-card h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--text1);
}
.service-card-body p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.7;
  margin: 0 0 14px;
}
.card-meta-row {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text3);
}
.read-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--brand-lite);
  font-weight: 600;
  transition: gap 0.2s ease;
}
.service-card:hover .read-link {
  gap: 8px;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.feature-card {
  position: relative;
  padding: 26px 24px;
  background: var(--bg800);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  transition: all 0.2s ease;
}
.feature-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--brand), var(--volt));
  opacity: 0.7;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2,200,120,0.3);
  box-shadow: var(--shadow-hover);
}
.icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(2,200,120,0.12);
  color: var(--brand-lite);
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--text1);
}
.feature-card p {
  font-size: 14px;
  color: var(--text2);
  margin: 0;
  line-height: 1.75;
}

/* Steps / process */
.steps-bg {
  background: var(--bg800);
}
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  counter-reset: step;
}
@media (min-width: 640px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .steps-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.step-card {
  position: relative;
  padding: 28px 24px 24px;
  background: var(--bg900);
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  min-height: 210px;
  overflow: hidden;
}
.step-num {
  font-family: "DIN Alternate", "Bebas Neue", "Arial Narrow", sans-serif;
  font-size: 88px;
  line-height: 1;
  color: rgba(255,255,255,0.07);
  font-weight: 700;
  position: absolute;
  top: 10px;
  right: 12px;
  letter-spacing: 1px;
}
.step-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin: 44px 0 10px;
  color: var(--text1);
  position: relative;
}
.step-card p {
  color: var(--text2);
  font-size: 14px;
  margin: 0;
  position: relative;
}
.step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--volt);
  box-shadow: 0 0 0 5px rgba(217,255,61,0.1);
  margin-bottom: 22px;
}

/* CTA banner */
.cta-banner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 40px 32px;
  border-radius: var(--radius-card);
  background: var(--bg800);
  border: 1px solid rgba(2,200,120,0.24);
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(2,200,120,0.18), transparent 70%);
  pointer-events: none;
}
@media (min-width: 900px) {
  .cta-banner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.cta-banner h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px;
}
.cta-banner p {
  color: var(--text2);
  margin: 0;
  font-size: 15px;
}
.cta-actions {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* FAQ */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 1024px) {
  .faq-layout {
    grid-template-columns: 0.9fr 1.5fr;
    gap: 72px;
  }
}
.faq-left {
  position: relative;
}
@media (min-width: 1024px) {
  .faq-left {
    position: sticky;
    top: 150px;
    align-self: start;
  }
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg800);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item.open {
  border-color: rgba(2,200,120,0.35);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: transparent;
  color: var(--text1);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  min-height: 56px;
}
.faq-icon {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.16);
  color: var(--brand-lite);
  font-size: 18px;
  font-weight: 300;
  transition: transform 0.24s ease, border-color 0.24s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--brand);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-a-inner {
  padding: 0 18px 18px;
  color: var(--text2);
  font-size: 15px;
  line-height: 1.8;
}
.faq-a-inner p {
  margin: 0 0 6px;
}

/* Footer */
.site-footer {
  background: #0A0E12;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-link {
  display: block;
  padding: 6px 0;
  color: var(--text3);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-link:hover {
  color: var(--brand-lite);
  padding-left: 4px;
}

/* Floating CTA */
.floating-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--brand), #00a860);
  color: #07130d;
  font-size: 15px;
  font-weight: 700;
  border-radius: 999px;
  padding: 14px 20px;
  box-shadow: 0 12px 36px rgba(2,200,120,0.35);
  opacity: 0;
  transform: translateY(24px);
  pointer-events: none;
  animation: floatIn 0.5s cubic-bezier(0.2,0.8,0.2,1) 4s forwards;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.floating-cta:hover {
  background: var(--brand-lite);
  color: #07130d;
  box-shadow: 0 16px 44px rgba(60,242,167,0.42);
}
.floating-cta.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(24px);
}
@keyframes floatIn {
  to {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}
.floating-cta .float-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #07130d;
  position: relative;
}
.floating-cta .float-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(7,19,13,0.35);
  animation: floatPing 1.8s infinite;
}
@keyframes floatPing {
  0%,100% {
    transform: scale(0.8);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.4);
    opacity: 0;
  }
}

/* responsive tweaks */
@media (max-width: 640px) {
  .category-hero {
    min-height: 280px;
    padding: 48px 0 40px;
  }
  .status-chip {
    font-size: 12px;
  }
  .cta-banner {
    padding: 30px 22px;
  }
}
.bg-deep-green-tint {
  background: linear-gradient(145deg, rgba(2,200,120,0.06), transparent 60%);
}