/* roulang page: index */
/* ===== CSS 设计变量 ===== */
        :root {
            --bg-deep: #05080F;
            --bg-body: #0A111E;
            --bg-elevated: rgba(13, 29, 45, 0.55);
            --bg-sidebar: #080D17;
            --primary-blue: #33A6FF;
            --primary-cyan: #2BE0C9;
            --accent-purple: #8F8BFF;
            --text-primary: #E9F0FA;
            --text-secondary: #8DA0BC;
            --border-glass: rgba(140, 180, 255, 0.08);
            --danger: #FF7D75;
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-btn: 0 0 24px rgba(43, 224, 201, 0.35);
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --sidebar-w: 260px;
            --center-max: 1280px;
            --space-1: 72px;
            --space-2: 100px;
        }

        /* ===== 基础 Reset 与 Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            background-image: radial-gradient(circle at 20% 10%, rgba(43,224,201,.06), transparent 30%),
                              radial-gradient(circle at 100% 20%, rgba(51,166,255,.07), transparent 35%),
                              radial-gradient(ellipse at 80% 90%, rgba(143,139,255,.05), transparent 30%);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: color .3s ease;
        }
        a:hover {
            color: var(--primary-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        ul, ol {
            list-style: none;
        }

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

        /* 左侧侧栏 + 主区布局 */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .app-main {
            flex: 1;
            margin-left: var(--sidebar-w);
            min-width: 0;
        }

        @media screen and (max-width: 1119px) {
            :root {
                --sidebar-w: 72px;
            }
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--center-max);
            margin: 0 auto;
            padding: 0 32px;
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 20px;
            }
        }

        /* ===== 左侧 App Shell 导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-w);
            z-index: 1000;
            background: rgba(5, 9, 16, .9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-right: 1px solid rgba(140, 180, 255, .06);
            display: flex;
            flex-direction: column;
            transition: transform .3s ease, width .2s ease;
        }

        .sb-brand {
            padding: 24px 18px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid rgba(140, 180, 255, .05);
            min-height: 80px;
        }

        .brand-logo-icon {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            position: relative;
            background: linear-gradient(135deg, rgba(51,166,255,.25), rgba(43,224,201,.25));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 16px rgba(51,166,255,.25);
        }
        .brand-logo-icon svg {
            width: 24px;
            height: 24px;
        }

        .brand-logo-text {
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
            line-height: 1.3;
            white-space: nowrap;
        }
        .brand-logo-text span {
            color: var(--primary-cyan);
            font-weight: 700;
        }

        .sb-nav {
            padding: 16px 0;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
        }

        .sb-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 22px;
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all .25s ease;
            position: relative;
            white-space: nowrap;
        }
        .sb-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: var(--text-secondary);
            transition: color .25s;
        }
        .sb-nav a span {
            transition: color .25s;
        }
        .sb-nav a:hover,
        .sb-nav a.active {
            color: var(--text-primary);
            background: linear-gradient(90deg, rgba(51,166,255,.08), transparent 90%);
            border-left-color: var(--primary-cyan);
        }
        .sb-nav a:hover i,
        .sb-nav a.active i {
            color: var(--primary-cyan);
        }
        .sb-nav a:hover span,
        .sb-nav a.active span {
            color: var(--text-primary);
        }

        .sb-bottom {
            padding: 16px 20px;
            border-top: 1px solid rgba(140, 180, 255, .05);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sb-bottom a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .8rem;
            color: var(--text-secondary);
            padding: 6px 4px;
        }
        .sb-bottom a:hover {
            color: var(--primary-cyan);
        }
        .sb-bottom a i {
            width: 18px;
            text-align: center;
        }

        .btn-to-top {
            cursor: pointer;
            background: none;
            border: none;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .8rem;
            color: var(--text-secondary);
            padding: 6px 4px;
        }
        .btn-to-top:hover {
            color: var(--primary-cyan);
        }

        /* 抽屉遮罩 */
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,.5);
            z-index: 1099;
            display: none;
            opacity: 0;
            transition: opacity .3s;
        }
        .drawer-overlay.active {
            display: block;
            opacity: 1;
        }

        /* 移动端顶栏 */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1200;
            background: rgba(5, 9, 16, .9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            align-items: center;
            justify-content: space-between;
            height: 60px;
            padding: 0 16px;
            border-bottom: 1px solid rgba(140, 180, 255, .06);
        }

        .topbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .topbar-brand .brand-logo-text {
            font-size: 1rem;
            white-space: nowrap;
        }
        .topbar-brand .brand-logo-icon {
            width: 32px;
            height: 32px;
        }
        .topbar-brand .brand-logo-icon svg {
            width: 20px;
            height: 20px;
        }

        .nav-toggle-btn {
            background: none;
            border: none;
            color: var(--primary-cyan);
            font-size: 1.6rem;
            cursor: pointer;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }
        .nav-toggle-btn:hover {
            background: rgba(140,180,255,.1);
        }

        @media screen and (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.mobile-open {
                transform: translateX(0);
                width: 280px;
                box-shadow: 0 0 60px rgba(0,0,0,.5);
            }
            .app-main {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 30px;
            font-size: .95rem;
            font-weight: 600;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            min-height: 44px;
            transition: all .3s ease;
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
            color: #08101a;
            box-shadow: 0 0 16px rgba(43,224,201,.15);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #52b7ff, #48ebd6);
            box-shadow: 0 0 28px rgba(43,224,201,.4);
            color: #071019;
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(43,224,201,.3);
        }

        .btn-secondary {
            background: rgba(13, 29, 45, .55);
            color: var(--text-primary);
            border: 1px solid rgba(140,180,255,.2);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .btn-secondary:hover {
            border-color: rgba(51,166,255,.6);
            background: rgba(51,166,255,.1);
            color: var(--text-primary);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary-cyan);
            border: 1px solid rgba(43,224,201,.4);
            padding: 10px 24px;
            min-height: 40px;
        }
        .btn-outline:hover {
            background: rgba(43,224,201,.1);
            box-shadow: 0 0 12px rgba(43,224,201,.2);
        }

        .btn-lg {
            padding: 16px 38px;
            font-size: 1.05rem;
            min-height: 52px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: .82rem;
            min-height: auto;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 14px;
            padding: 12px 28px;
            background: linear-gradient(145deg, rgba(51,166,255,.12), rgba(43,224,201,.12));
            border: 1px solid rgba(140,180,255,.2);
            border-radius: 16px;
            backdrop-filter: blur(12px);
            color: var(--text-primary);
            min-height: 62px;
            min-width: 200px;
            cursor: pointer;
            transition: all .3s;
        }
        .btn-download i {
            font-size: 1.8rem;
            color: var(--primary-cyan);
        }
        .btn-download .download-content {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.3;
        }
        .btn-download .download-content strong {
            font-size: 1rem;
            color: var(--text-primary);
        }
        .btn-download .download-content small {
            font-size: .78rem;
            color: var(--text-secondary);
        }
        .btn-download:hover {
            border-color: rgba(43,224,201,.7);
            box-shadow: 0 0 24px rgba(43,224,201,.15);
            transform: translateY(-2px);
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: rgba(51,166,255,.12);
            border: 1px solid rgba(51,166,255,.2);
            border-radius: 999px;
            font-size: .78rem;
            color: var(--primary-blue);
            font-weight: 600;
            letter-spacing: .5px;
        }

        .badge-cyan {
            background: rgba(43,224,201,.15);
            border-color: rgba(43,224,201,.2);
            color: var(--primary-cyan);
        }

        .badge-light {
            background: rgba(140,180,255,.1);
            border-color: var(--border-glass);
            color: var(--text-secondary);
        }

        /* ===== 标签 chip ===== */
        .chip-cat {
            display: inline-block;
            padding: 2px 10px;
            font-size: .72rem;
            border-radius: 6px;
            background: rgba(143,139,255,.18);
            color: var(--accent-purple);
            font-weight: 600;
            letter-spacing: .5px;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: var(--space-2) 0;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 40px;
            max-width: 640px;
            line-height: 1.7;
        }

        @media screen and (max-width: 520px) {
            .section-title {
                font-size: 1.45rem;
            }
        }

        /* ===== 首页 Hero ===== */
        .hero {
            position: relative;
            padding: 0 40px;
            min-height: calc(100vh - 80px);
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: .25;
            z-index: 0;
        }
        .hero .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, var(--bg-body) 10%, rgba(10,17,30,.6) 60%, rgba(10,17,30,.35) 100%);
        }
        .hero .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, var(--bg-body) 0%, transparent 30%);
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 48px;
            align-items: center;
            padding: 80px 0;
        }
        .hero-content h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.25;
            letter-spacing: -1px;
            margin: 16px 0;
        }
        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan), #e0c8ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 550px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .hero-badge {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 6px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }
        .hero-trusted {
            margin-top: 28px;
            display: flex;
            align-items: center;
            gap: 14px;
            color: var(--text-secondary);
            font-size: .8rem;
        }
        .hero-trusted .stat-num {
            font-size: 1.2rem;
            color: var(--text-primary);
            font-weight: 800;
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: flex-end;
        }
        .hero-frame-wrap {
            position: relative;
            max-width: 520px;
            width: 100%;
            border-radius: 26px;
            overflow: hidden;
            border: 1px solid rgba(140,180,255,.2);
            box-shadow: 0 40px 100px rgba(0,0,0,.5), 0 0 0 1px rgba(140,180,255,.1);
        }
        .hero-frame-wrap img {
            width: 100%;
            height: auto;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .hero-glass-bar {
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 16px;
            background: rgba(13, 29, 45, .72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 14px 18px;
            border-radius: 16px;
            border: 1px solid rgba(140,180,255,.12);
        }
        .hero-glass-bar .bar-title {
            color: var(--text-primary);
            font-size: .9rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .hero-glass-bar .bar-sub {
            color: var(--text-secondary);
            font-size: .8rem;
        }
        .hero-primary-btn {
            transform: scale(1);
        }

        @media screen and (max-width: 1023px) {
            .hero {
                padding: 40px 20px 0;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                padding: 30px 0 60px;
            }
            .hero-visual {
                justify-content: center;
            }
            .hero-header-hidden-mobile {
                display: block;
            }
        }

        /* ===== Bento 价值区 ===== */
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 22px;
        }
        .bento-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            transition: transform .3s, box-shadow .3s, border-color .3s;
            position: relative;
            overflow: hidden;
        }
        .bento-card:hover {
            transform: translateY(-4px);
            border-color: rgba(51,166,255,.3);
            box-shadow: var(--shadow-card), 0 0 30px rgba(51,166,255,.08);
        }
        .bento-card .tile-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(51,166,255,.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.4rem;
            color: var(--primary-blue);
        }
        .bento-card .tile-icon.cyan {
            background: rgba(43,224,201,.14);
            color: var(--primary-cyan);
        }
        .bento-card .tile-icon.purple {
            background: rgba(143,139,255,.14);
            color: var(--accent-purple);
        }
        .bento-card h3 {
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .bento-card p {
            color: var(--text-secondary);
            font-size: .92rem;
            line-height: 1.7;
        }

        .bento-7col { grid-column: span 7; }
        .bento-5col { grid-column: span 5; }
        .bento-4col { grid-column: span 4; }
        .bento-12col { grid-column: span 12; }

        @media screen and (max-width: 900px) {
            .bento-7col,
            .bento-5col,
            .bento-4col {
                grid-column: span 12;
            }
        }

        /* 值卡片 list */
        .tile-list {
            margin-top: 8px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            padding: 0;
        }
        .tile-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: .9rem;
            padding: 8px 10px;
            background: rgba(140,180,255,.03);
            border-radius: 10px;
        }
        .tile-list li i {
            color: var(--primary-cyan);
            font-size: .85rem;
        }

        @media screen and (max-width: 640px) {
            .tile-list {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 轮播展示区 ===== */
        .showcase-section {
            background: linear-gradient(180deg, transparent, rgba(13,29,45,.4), transparent);
        }

        .showcase-shell {
            position: relative;
            background: var(--bg-elevated);
            border: 1px solid var(--border-glass);
            border-radius: 24px;
            padding: 50px 30px;
            text-align: center;
        }
        .showcase-window {
            display: flex;
            overflow: hidden;
            border-radius: 16px;
            border: 1px solid rgba(140,180,255,.06);
            scroll-snap-type: x mandatory;
            scrollbar-width: none;
        }
        .showcase-window::-webkit-scrollbar { display: none; }

        .showcase-item {
            min-width: 100%;
            scroll-snap-align: start;
            position: relative;
        }
        .showcase-item img {
            width: 100%;
            height: auto;
            min-height: 300px;
            object-fit: cover;
        }

        .showcase-arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            z-index: 5;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(13,29,45,.75);
            color: var(--primary-cyan);
            border: 1px solid rgba(140,180,255,.2);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all .3s;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        .showcase-arrow:hover {
            background: rgba(51,166,255,.2);
            box-shadow: 0 0 16px rgba(43,224,201,.3);
        }

        .showcase-prev.arrow-left {
            left: 14px;
        }
        .showcase-next.arrow-right {
            right: 14px;
        }

        .showcase-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }
        .showcase-dots .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(140,180,255,.2);
            border: none;
            transition: all .3s;
            cursor: pointer;
            padding: 0;
        }
        .showcase-dots .dot.active {
            background: var(--primary-cyan);
            box-shadow: 0 0 10px rgba(43,224,201,.8);
            transform: scale(1.2);
        }
        @media screen and (max-width: 640px) {
            .showcase-shell {
                padding: 30px 12px;
            }
        }

        /* ===== 系统要求区 ===== */
        .spec-section {
            padding: var(--space-2) 0;
        }
        .spec-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .spec-grid .spec-item-title {
            font-size: 1rem;
            color: var(--text-primary);
            font-weight: 600;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .spec-item {
            background: rgba(140,180,255,.07);
            border: 1px solid var(--border-glass);
            border-radius: 18px;
            padding: 28px 22px;
            transition: background .3s;
        }
        .spec-item:hover {
            background: rgba(140,180,255,.12);
            border-color: rgba(51,166,255,.3);
        }
        .spec-item .spec-icon {
            color: var(--accent-purple);
            font-size: .85rem;
        }
        .spec-item h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .spec-item p {
            color: var(--text-secondary);
            font-size: .88rem;
        }
        @media screen and (max-width: 1024px) {
            .spec-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media screen and (max-width: 520px) {
            .spec-grid { grid-template-columns: 1fr; }
        }

        /* ===== 评价墙 ===== */
        .score-summary-card {
            background: linear-gradient(145deg, rgba(51,166,255,.22), rgba(43,224,201,.16));
            border: 1px solid rgba(140,180,255,.2);
            border-radius: var(--radius-lg);
            padding: 30px;
            color: #fff;
            text-align: center;
        }
        .score-num {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1;
            color: var(--text-primary);
        }
        .star-row {
            display: flex;
            justify-content: center;
            gap: 4px;
            color: #FFDD55;
            margin: 12px 0 8px;
        }
        .testi-tabs-badge {
            display: inline-block;
            background: rgba(233, 240, 250, .12);
            border-radius: 999px;
            padding: 4px 14px;
            font-size: .75rem;
            color: var(--text-secondary);
        }

        .testimonial-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
            margin-top: 30px;
        }
        .testimonial-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-md);
            padding: 20px 22px;
        }
        .testimonial-head {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-bottom: 12px;
        }
        .testimonial-head .avatar-circle {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(51,166,255,.4), rgba(43,224,201,.4));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
        }
        .testimonial-head .nick {
            font-size: .9rem;
            color: var(--text-primary);
            font-weight: 600;
            
        }
        .testimonial-head .origin {
            font-size: .72rem;
            color: var(--text-secondary);
        }
        .testimonial-head .star-group {
            display: flex;
            gap: 2px;
            margin-top: 4px;
            color: #FFBB33;
            font-size: .75rem;
        }
        .testimonial-card p {
            color: var(--text-secondary);
            font-size: .88rem;
            line-height: 1.65;
        }
        @media screen and (max-width: 768px) {
            .testimonial-list { grid-template-columns: 1fr; }
        }

        /* ===== 下载按钮组 ===== */
        .download-cta {
            background: rgba(13, 29, 45, .65);
            border: 1px solid rgba(51,166,255,.2);
            border-radius: 26px;
            padding: 54px 30px;
            text-align: center;
            backdrop-filter: blur(10px);
            box-shadow: 0 20px 60px rgba(0,0,0,.3);
        }
        .download-cta h2 {
            color: var(--text-primary);
            font-size: 1.9rem;
            margin-bottom: 14px;
        }
        .download-cta .desc-text {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 24px;
            font-size: .95rem;
        }
        .download-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }
        .download-btn-group .btn-download {
            min-width: 240px;
        }

        /* ===== CMS 动态资讯区 ===== */
        .dynamic-section {
            padding: var(--space-2) 0;
        }
        .dynamic-layout {
            display: grid;
            grid-template-columns: .8fr 2.2fr;
            gap: 40px;
        }
        .dynamic-left {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .dynamic-left p {
            color: var(--text-secondary);
            font-size: .88rem;
        }
        .filter-group {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .filter-pill {
            background: rgba(140,180,255,.1);
            border: 1px solid transparent;
            padding: 5px 12px;
            border-radius: 999px;
            color: var(--text-secondary);
            font-size: .7rem;
            cursor: pointer;
            transition: all .25s;
        }
        .filter-pill:hover {
            border-color: rgba(143,139,255,.6);
            color: var(--accent-purple);
        }
        .filter-pill.is-active {
            color: var(--primary-cyan);
            background: rgba(43,224,201,.1);
            border-color: rgba(43,224,201,.3);
            font-weight: 600;
        }

        .feed-list {
            list-style: none;
            margin: 0;
        }
        .feed-item {
            background: rgba(140,180,255,.05);
            border: 1px solid rgba(140,180,255,.06);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            margin-bottom: 16px;
            transition: all .3s;
            display: block;
        }
        .feed-item:hover {
            border-color: rgba(51,166,255,.3);
            background: rgba(51,166,255,.08);
            transform: translateX(5px);
        }
        .feed-item-top {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }
        .feed-item h3 {
            font-size: 1.12rem;
            color: var(--text-primary);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .feed-item .feed-summary {
            color: var(--text-secondary);
            font-size: .88rem;
            line-height: 1.65;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .feed-item .feed-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: .8rem;
            color: var(--text-secondary);
        }
        .feed-item .read-link {
            margin-left: auto;
            color: var(--primary-cyan);
            font-size: .8rem;
        }
        .feed-item .read-link i {
            transition: transform .2s;
        }
        .feed-item:hover .read-link i {
            transform: translateX(4px);
        }

        .empty-text {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-secondary);
        }

        @media screen and (max-width: 900px) {
            .dynamic-layout {
                grid-template-columns: 1fr;
            }
            .dynamic-left {
                position: static;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-elevated);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(8px);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 1rem;
        }
        .faq-question .faq-icon {
            color: var(--primary-cyan);
            font-size: 1.2rem;
            transition: transform .3s;
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-item.is-open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            background: rgba(0,0,0,.1);
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: .9rem;
            line-height: 1.7;
            border-left: 3px solid rgba(43,224,201,.5);
            margin: 0 24px 14px 24px;
            padding-left: 16px;
        }

        /* ===== CTA 区块 ===== */
        .cta-final {
            background: linear-gradient(145deg, rgba(51,166,255,.2), rgba(43,224,201,.1));
            border: 1px solid rgba(140,180,255,.16);
            border-radius: 28px;
            padding-bottom: 60px;
            padding-top: 60px;
            text-align: center;
            margin: 0;
        }
        .cta-final h2 {
            font-size: 2rem;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .cta-final .cta-final-desc {
            color: var(--text-secondary);
            margin-bottom: 30px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 页脚 ===== */
        .app-footer {
            background: rgba(3, 5, 10, .7);
            border-top: 1px solid rgba(140, 180, 255, .05);
            padding: 50px 0 30px;
            margin-top: 40px;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .footer-desc {
            color: var(--text-secondary);
            font-size: .9rem;
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-nav {
            display: flex;
            gap: 24px;
            margin-bottom: 20px;
        }
        .footer-nav a {
            color: var(--text-secondary);
            font-size: .9rem;
        }
        .footer-nav a:hover {
            color: var(--primary-cyan);
        }
        .copyright-row {
            border-top: 1px solid rgba(140,180,255,.05);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-secondary);
            font-size: .8rem;
        }
        .legacy-links a {
            color: var(--text-secondary);
            margin-left: 24px;
        }

        @media screen and (max-width: 768px) {
            .footer-nav {
                flex-wrap: wrap;
                gap: 12px;
            }
            .copyright-row {
                flex-wrap: wrap;
                gap: 12px;
            }
            .legacy-links a {
                margin-left: 0;
                margin-right: 20px;
            }
        }

        /* ===== 页面级模板：内页 head 區 ===== */
        .inner-page-head {
            background: rgba(13, 29, 45, .45);
            padding: 40px 0;
            border-bottom: 1px solid var(--border-glass);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .85rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb .current {
            color: var(--text-primary);
        }
        .breadcrumb i {
            font-size: .7rem;
        }

        .article-body {
            padding: 50px 0 var(--space-2);
        }
        .article-body .article-container {
            max-width: 780px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-secondary);
            font-size: .85rem;
            margin: 20px 0 30px;
            border-bottom: 1px solid rgba(140,180,255,.1);
            padding-bottom: 22px;
        }
        .article-content {
            font-size: 1.01rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-content h2 {
            font-size: 1.5rem;
            margin: 32px 0 16px;
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .article-content img {
            margin: 30px auto;
            border-radius: var(--radius-md);
            max-width: 100%;
        }
        .categories-meta-chip {
            margin-bottom: 10px;
        }

        .author-box {
            background: rgba(140,180,255,.05);
            border-radius: var(--radius-md);
            padding: 20px;
            margin: 40px 0;
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .rel-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: border-color .3s;
            margin-bottom: 14px;
        }
        .rel-card:hover {
            border-color: rgba(51,166,255,.4);
        }
        .rel-card h4 {
            font-size: .95rem;
            color: var(--text-primary);
        }
        .rel-card .rel-meta {
            color: var(--text-secondary);
            font-size: .75rem;
        }

        /* ===== 分类页：Service-style ===== */
        .cat-hero {
            position: relative;
            border-radius: 26px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 40px 40px;
        }
        .cat-hero .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(5,8,15,.95) 20%, rgba(10,17,30,.7));
        }
        .cat-hero > .relative {
            position: relative;
            z-index: 2;
        }
        @media screen and (max-width: 768px) {
            .cat-hero {
                padding: 20px 20px;
            }
        }

        /* 步骤流程区 */
        .steps-vertical {
            list-style: none;
            position: relative;
        }
        .steps-vertical li {
            display: flex;
            gap: 18px;
            margin-bottom: 32px;
        }
        .steps-vertical .step-num {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(51,166,255,.2), rgba(43,224,201,.2));
            border: 1px solid rgba(43,224,201,.4);
            color: var(--text-primary);
            font-weight: 800;
            font-size: 1.05rem;
        }
        .steps-vertical .step-num.purple {
            background: linear-gradient(135deg, rgba(143,139,255,.3), rgba(51,166,255,.2));
        }

        .step-desc {
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glass);
            padding: 18px 22px;
            margin-bottom: 24px;
            color: var(--text-secondary);
            font-size: .95rem;
        }

        /* 图文交替区 */
        .feature-two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 34px;
            margin-bottom: 40px;
            align-items: center;
        }
        .feature-two-col .txt-side h2 {
            font-size: 1.6rem;
            margin-bottom: 18px;
            line-height: 1.4;
        }
        .feature-two-col .txt-side p {
            margin-bottom: 16px;
        }
        @media screen and (max-width: 900px) {
            .feature-two-col {
                grid-template-columns: 1fr;
            }
        }

        .info-frame {
            border: 1px solid rgba(51,166,255,.2);
            background: rgba(51,166,255,.06);
            border-left: 4px solid var(--primary-cyan);
            padding: 20px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            display: flex;
            align-items: center;
            gap: 14px;
            margin: 22px 0;
        }
        .info-frame i {
            color: var(--primary-cyan);
            font-size: 1.2rem;
        }

        /* 锚点目录 */
        .anchor-toc {
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glass);
            padding: 22px 26px;
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .anchor-toc a {
            color: var(--text-secondary);
            font-size: .85rem;
        }
        .anchor-toc a:hover {
            color: var(--primary-cyan);
        }

        /* ===== 正文阅读区域 ===== */
        .reading-area {
            width: 100%;
            max-width: 760px;
            margin: 0 auto;
        }

        /* ===== 移动端适配 ===== */
        @media screen and (max-width: 640px) {
            .section {
                padding: 48px 0;
            }
            :root {
                --space-2: 48px;
                --space-1: 36px;
            }
            .btn-download {
                width: 100%;
                justify-content: center;
            }
            .download-btn-group {
                width: 100%;
            }
            .hero-subtitle {
                font-size: .95rem;
            }
            .hero-grid {
                gap: 20px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .spec-grid {
                grid-template-columns: 1fr;
            }

            .feed-item h3 {
                font-size: 1rem;
            }

            .faq-item .faq-question {
                padding: 16px 16px;
                font-size: .9rem;
            }
            .cta-final h2 {
                font-size: 1.4rem;
            }
        }

        @media screen and (min-width: 1120px) {
            .app-main {
                margin-left: var(--sidebar-w);
            }
        }

        @media screen and (max-width: 1023px) {
            .sidebar.mobile-open {
                position: fixed;
            }
        }

        /* 滚动条 */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(140,180,255,.2);
            border-radius: 10px;
        }

        /* focus 可访问性 */
        a:focus-visible, button:focus-visible {
            outline: 3px solid rgba(43,224,201,.6);
            outline-offset: 2px;
        }

        input:focus-visible, textarea:focus-visible {
            outline: none;
        }

        /* ===== 当前页 active 高亮 ===== */
        .sb-nav a.is-active {
            color: var(--text-primary);
            background: linear-gradient(90deg, rgba(43,224,201,.12), transparent 80%);
            border-left-color: var(--primary-cyan);
        }
        .sb-nav a.is-active i {
            color: var(--primary-cyan);
        }

        .btn-yellow-soft {
            background: rgba(255, 210, 80, .12);
            color: #FFE2A0;
        }
        .btn-yellow-soft:hover {
            background: rgba(255, 210, 80, .2);
        }
        .radius-group {
            border-radius: var(--radius-md);
        }
        .section-white-text {
            color: var(--text-primary);
        }
        .muted-text {
            color: var(--text-secondary);
        }
        .hero-demo-visual {
            max-width: 120px;
        }
        .link-card-grid-new {
            display: grid;
            gap: 12px;
        }
        .p-4 { padding: 20px; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mt-4 { margin-top: 24px; }
        .mb-4 { margin-bottom: 24px; }
        .flex-mobile-safe {
            display: flex;
        }

        .cta-buttons-action {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        @media screen and (max-width: 520px) {
            .flex-mobile-safe {
                flex-direction: column;
                gap: 10px;
            }
        }

/* roulang page: article */
:root{
    --bg:#05080F;
    --bg-2:#0A111E;
    --panel:rgba(13,29,45,0.55);
    --panel-strong:rgba(11,20,32,0.82);
    --stroke:rgba(140,180,255,0.14);
    --stroke-bright:rgba(120,190,255,0.32);
    --primary:#33A6FF;
    --teal:#2BE0C9;
    --violet:#8F8BFF;
    --coral:#FF7D75;
    --text:#E9F0FA;
    --muted:#8DA0BC;
    --radius:20px;
    --radius-sm:10px;
    --shadow:0 20px 50px rgba(0,0,0,0.35);
    --sidebar-w:262px;
    --tr:0.25s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{margin:0;padding:0;}
body{
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:
        radial-gradient(circle at 18% 6%, rgba(47,174,255,0.10), transparent 26%),
        radial-gradient(circle at 90% 92%, rgba(43,224,201,0.07), transparent 28%),
        linear-gradient(160deg,#05080F 0%,#0A111E 48%,#060A12 100%);
    color:var(--text);
    font-size:16px;
    line-height:1.72;
    -webkit-font-smoothing:antialiased;
    display:flex;
    flex-direction:column;
    min-height:100vh;
}
a{color:#C9DFFF;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease;}
a:hover{color:#FFFFFF;}
img{max-width:100%;height:auto;}
button{font-family:inherit;cursor:pointer;color:inherit;}
.container{width:min(1200px,100%);margin:0 auto;padding:0 clamp(20px,4vw,44px);}
.skip-link{
    position:absolute;left:14px;top:-80px;z-index:120;background:var(--teal);color:#02060A;
    padding:10px 18px;border-radius:10px;transition:top .2s ease;
}
.skip-link:focus{top:14px;}
.app-aside{
    position:fixed;inset:0 auto 0 0;width:var(--sidebar-w);
    background:linear-gradient(178deg,rgba(8,15,25,.96),rgba(4,7,14,.98));
    border-right:1px solid var(--stroke);
    backdrop-filter:blur(18px);
    z-index:80;
    display:flex;
    flex-direction:column;
    overflow:hidden;
    transition:transform .35s cubic-bezier(.4,0,.2,1),box-shadow .35s ease;
}
.app-aside::before{
    content:"";position:absolute;left:-80px;top:-60px;width:220px;height:220px;
    background:radial-gradient(circle,rgba(51,166,255,.16),transparent 68%);
    pointer-events:none;
}
.app-aside::after{
    content:"";position:absolute;bottom:-110px;right:-90px;width:240px;height:240px;
    background:radial-gradient(circle,rgba(143,139,255,.12),transparent 70%);
    pointer-events:none;
}
.aside-inner{
    position:relative;z-index:2;display:flex;flex-direction:column;
    height:100%;
    padding:24px 18px 18px;
}
.brand-logo{
    display:flex;align-items:center;gap:12px;padding:6px 8px 22px;
    border-bottom:1px solid rgba(140,180,255,.10);
    margin:0 6px;
}
.brand-mark{
    flex:0 0 auto;width:40px;height:40px;border-radius:13px;
    background:linear-gradient(135deg,#33A6FF 0%,#2BE0C9 100%);
    display:flex;align-items:center;justify-content:center;
    color:#06121C;font-weight:800;font-size:21px;
    box-shadow:0 0 18px rgba(43,224,201,.30);
}
.brand-text{
    display:flex;flex-direction:column;line-height:1.28;
}
.brand-main{
    font-size:15px;font-weight:800;letter-spacing:.02em;color:#F2F6FD;white-space:nowrap;
}
.brand-sub{
    font-size:11px;color:var(--muted);margin-top:2px;
}
.sb-nav{
    display:flex;flex-direction:column;gap:6px;
    padding:26px 2px 0;
}
.sb-nav a{
    position:relative;display:flex;align-items:center;gap:14px;
    padding:13px 16px;border-radius:13px;
    font-size:15px;color:#A9BBD6;font-weight:600;
    transition:background .22s ease,color .22s ease,transform .22s ease;
}
.sb-nav a:hover{
    background:rgba(51,166,255,.08);color:#FFFFFF;transform:translateX(2px);
}
.sb-nav a::before{
    content:"";position:absolute;left:0;top:20%;bottom:20%;width:3px;
    background:linear-gradient(180deg,var(--primary),var(--teal));
    border-radius:3px;opacity:0;transform:scaleY(.5);
    transition:opacity .25s ease,transform .25s ease;
}
.sb-nav a:hover::before,.sb-nav a.is-active::before{
    opacity:1;transform:scaleY(1);
}
.sb-nav a.is-active{
    background:linear-gradient(90deg,rgba(51,166,255,.16),rgba(43,224,201,.04));
    color:#FFFFFF;
}
.sb-nav a i{
    width:18px;text-align:center;font-size:16px;color:var(--muted);
    transition:color .2s ease;
}
.sb-nav a:hover i,.sb-nav a.is-active i{color:var(--teal);}
.aside-bottom{
    margin-top:auto;padding:16px 8px 2px;border-top:1px solid rgba(140,180,255,.08);
}
.aside-bottom a{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;color:#6E849F;padding:8px 10px;border-radius:8px;
}
.aside-bottom a:hover{color:var(--primary);background:rgba(51,166,255,.06);}
.aside-bottom span{display:flex;gap:4px;flex-wrap:wrap;padding:0 10px;}
.app-main{
    margin-left:var(--sidebar-w);
    width:calc(100% - var(--sidebar-w));
    display:flex;flex-direction:column;
    min-height:100vh;
    position:relative;
    z-index:2;
}
.app-main-wrapper{flex:1 0 auto;}
.mobile-topbar{
    display:none;
}
.menu-burger{
    border:0;background:transparent;width:42px;height:42px;border-radius:12px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    transition:background .2s ease;
}
.menu-burger:hover{background:rgba(51,166,255,.14);}
.menu-burger span{width:20px;height:2px;background:#fff;border-radius:2px;display:block;}
.aside-backdrop{display:none;position:fixed;inset:0;background:rgba(3,6,12,.6);z-index:65;backdrop-filter:blur(2px);}
.main-wrap{
    width:100%;
    padding:42px clamp(18px,4vw,48px) 64px;
}
.breadcrumb-nav{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--muted);
    margin-bottom:26px;
}
.breadcrumb-nav a{
    color:#9FB2CC;display:inline-flex;align-items:center;gap:7px;
    transition:color .2s ease;
}
.breadcrumb-nav a:hover{color:var(--teal);}
.breadcrumb-nav .sep{color:#4C5F79;display:inline-block;}
.breadcrumb-nav .current{color:#D5E2F5;max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-shell{
    max-width:860px;margin:0 auto;position:relative;
}
.article-card{
    background:linear-gradient(145deg,rgba(15,27,42,.82),rgba(8,15,25,.72));
    border:1px solid var(--stroke);
    border-radius:26px;
    padding:clamp(24px,5vw,52px);
    box-shadow:var(--shadow),0 0 0 1px rgba(140,180,255,.05);
    backdrop-filter:blur(16px);
    position:relative;
    overflow:hidden;
}
.article-card::before{
    content:"";position:absolute;inset:-160px auto auto -100px;width:300px;height:180px;
    background:radial-gradient(closest-side,rgba(43,224,201,.12),transparent);
    pointer-events:none;
}
.article-kicker{
    display:flex;flex-wrap:wrap;gap:12px;align-items:center;
    margin-bottom:18px;
}
.badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;font-weight:700;line-height:1;
    padding:8px 12px;border-radius:999px;
    background:rgba(51,166,255,.12);
    color:#95C9FF;
    border:1px solid rgba(51,166,255,.25);
}
.badge.teal{
    background:rgba(43,224,201,.10);
    color:#6CECD9;
    border-color:rgba(43,224,201,.25);
}
.article-title{
    font-size:clamp(1.75rem,3.2vw,2.85rem);
    font-weight:800;
    line-height:1.28;
    color:#F3F7FD;
    letter-spacing:-.015em;
    margin:0 0 22px;
    text-wrap:balance;
}
.article-meta{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
    padding:14px 0 22px;
    border-bottom:1px solid rgba(140,180,255,.10);
    color:#8A9EB9;font-size:13px;
}
.meta-item{
    display:inline-flex;align-items:center;gap:7px;
}
.meta-item i{color:var(--teal);width:14px;}
.meta-divider{width:1px;height:14px;background:rgba(140,180,255,.16);}
.article-cover{
    margin:28px 0 8px;
    border-radius:20px;
    overflow:hidden;
    border:1px solid var(--stroke);
    background:rgba(255,255,255,.03);
    box-shadow:0 18px 42px rgba(0,0,0,.30);
}
.article-cover img{
    display:block;width:100%;object-fit:cover;
    aspect-ratio:16/7;min-height:180px;
}
.article-body{
    padding-top:30px;
    font-size:16px;
    line-height:1.9;
    color:#DBE6F5;
    overflow-wrap:break-word;
}
.article-body > * + *{margin-top:1.05em;}
.article-body p{
    margin:0;
    font-size:16px;
    line-height:1.92;
}
.article-body h2,.article-body h3,.article-body h4{
    color:#F6F9FE;line-height:1.4;margin-top:1.6em;letter-spacing:-.01em;}
.article-body h2{font-size:1.45rem;padding-left:14px;border-left:3px solid var(--teal);}
.article-body h3{font-size:1.2rem;}
.article-body h4{font-size:1.05rem;}
.article-body ul,.article-body ol{padding-left:22px;}
.article-body li{margin:.45em 0;}
.article-body blockquote{
    margin:1.4em 0;padding:16px 20px;
    border-left:3px solid var(--violet);
    background:rgba(143,139,255,.07);
    border-radius:0 14px 14px 0;
    color:#C5CFF0;
}
.article-body a{
    color:var(--teal);border-bottom:1px solid rgba(43,224,201,.35);
}
.article-body a:hover{border-color:var(--teal);}
.article-body img{
    border-radius:16px;margin:1.2em auto;display:block;
    box-shadow:0 18px 44px rgba(0,0,0,.34);
}
.article-body code{
    background:rgba(51,166,255,.10);color:#8ED0FF;
    padding:2px 7px;border-radius:6px;
}
.article-body table{
    width:100%;border-collapse:collapse;margin:1.4em 0;border:1px solid var(--stroke);
}
.article-body th,.article-body td{
    border:1px solid var(--stroke);padding:10px 14px;text-align:left;
}
.article-body th{background:rgba(51,166,255,.08);color:#E7F1FF;}
.article-cta{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    margin-top:38px;
    padding:24px 26px;
    border-radius:20px;
    background:
        linear-gradient(120deg,rgba(43,224,201,.16),rgba(51,166,255,.14)),
        rgba(10,19,30,.74);
    border:1px solid rgba(43,224,201,.26);
    box-shadow:0 16px 44px rgba(0,0,0,.26);
}
.article-cta-copy strong{
    display:block;font-size:1.18rem;margin-bottom:6px;color:#F0FAFF;
}
.article-cta-copy span{font-size:13px;color:#9DAFC9;}
.btn-group{display:flex;flex-wrap:wrap;gap:12px;}
.btn{
    position:relative;
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-weight:700;border-radius:999px;padding:12px 22px;
    font-size:14px;line-height:1.2;
    border:1px solid transparent;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,opacity .2s ease;
    text-align:center;
    min-height:44px;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0) scale(.98);}
.btn:focus-visible{outline:3px solid rgba(43,224,201,.5);outline-offset:3px;}
.btn-primary{
    background:linear-gradient(100deg,var(--primary),var(--teal));
    color:#07131B;
    box-shadow:0 0 20px rgba(43,224,201,.28);
}
.btn-primary:hover{
    box-shadow:0 0 34px rgba(43,224,201,.46);
    color:#02060A;
}
.btn-ghost{
    background:rgba(255,255,255,.05);
    border-color:rgba(140,180,255,.28);
    color:#D6E3F5;
    backdrop-filter:blur(5px);
}
.btn-ghost:hover{
    border-color:rgba(43,224,201,.5);
    background:rgba(43,224,201,.08);
    color:#fff;
}
.related-sec{
    max-width:860px;margin:28px auto 0;
}
.related-head{
    position:relative;display:flex;align-items:center;gap:12px;
    margin-bottom:18px;padding-left:16px;
}
.related-head::before{
    content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
    border-radius:3px;background:linear-gradient(180deg,var(--primary),var(--teal));
}
.related-head h2{font-size:1.35rem;margin:0;font-weight:700;color:#EDF4FF;}
.related-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:18px;
}
.rel-card{
    display:flex;
    align-items:center;
    gap:16px;
    padding:18px;
    background:rgba(12,23,36,.62);
    border:1px solid var(--stroke);
    border-radius:18px;
    color:var(--text);
    transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.rel-card:hover{
    transform:translateY(-3px);
    border-color:rgba(43,224,201,.4);
    background:rgba(18,32,48,.72);
    color:#fff;
}
.rel-ic{
    flex:0 0 44px;width:44px;height:44px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(140deg,rgba(51,166,255,.94),rgba(43,224,201,.9));
    color:#04101A;font-size:18px;
}
.rel-copy strong{display:block;font-size:15px;line-height:1.45;}
.rel-copy small{display:block;margin-top:4px;color:#8298B5;font-size:12px;line-height:1.5;}
.rel-copy .more-link{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;color:var(--teal);margin-top:8px;font-weight:700;
}
.article-empty{
    max-width:720px;margin:12vh auto;text-align:center;
}
.empty-ic{
    width:64px;height:64px;margin:0 auto 24px;border-radius:22px;
    background:rgba(143,139,255,.14);
    border:1px solid rgba(143,139,255,.3);
    display:flex;align-items:center;justify-content:center;
    color:#8F8BFF;font-size:22px;
}
.article-empty h1{font-size:1.7rem;color:#F2F6FD;margin:0 0 12px;}
.article-empty p{color:#8B9DB9;margin:0 0 24px;}
.app-footer{
    flex-shrink:0;
    margin-left:var(--sidebar-w);
    width:calc(100% - var(--sidebar-w));
    background:#020409;position:relative;
    border-top:1px solid rgba(140,180,255,.08);
    padding:34px 0 22px;
}
.app-footer .footer-brand{font-size:1.1rem;font-weight:800;color:#F1F6FF;}
.app-footer .footer-desc{
    color:#64788f;font-size:13px;margin-top:10px;line-height:1.75;max-width:34em;
}
.footer-nav{
    display:flex;flex-wrap:wrap;gap:18px;margin-top:18px;
}
.footer-nav a{
    color:#A8BCD6;font-size:14px;font-weight:600;
    padding:4px 0;border-bottom:1px solid transparent;transition:all .2s ease;
}
.footer-nav a:hover{
    color:var(--teal);border-color:rgba(43,224,201,.5);
}
.copyright-row{
    display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;
    border-top:1px solid rgba(140,180,255,.06);
    padding-top:20px;margin-top:24px;
    color:#43556A;font-size:12px;
}
.copyright-row a{color:#647b99;font-size:12px;margin-left:14px;}
.copyright-row a:hover{color:var(--teal);}
@media (max-width:1023px){
    .app-aside{
        width:272px;
        transform:translateX(-105%);
        box-shadow:none;
    }
    body.nav-open .app-aside{
        transform:translateX(0);
        box-shadow:20px 0 60px rgba(0,0,0,.55);
    }
    body.nav-open .aside-backdrop{display:block;}
    .app-main,.app-footer{
        margin-left:0;
        width:100%;
    }
    .mobile-topbar{
        display:flex;
        align-items:center;
        justify-content:space-between;
        position:sticky;
        top:0;
        z-index:60;
        height:60px;
        padding:0 20px;
        background:rgba(5,8,15,.80);
        backdrop-filter:blur(20px);
        border-bottom:1px solid rgba(140,180,255,.10);
    }
    .mobile-brand{
        font-size:16px;font-weight:800;
        display:inline-flex;align-items:center;gap:8px;
    }
    .aside-backdrop{position:fixed;}
}
@media (max-width:800px){
    .main-wrap{padding:26px 16px 48px;}
    .article-card{padding:20px 18px 28px;border-radius:20px;}
    .article-cta{
        flex-direction:column;
        align-items:stretch;
        padding:22px;
        gap:16px;
    }
    .btn-group{width:100%;}
    .btn-group .btn{flex:1;min-width:0;}
    .related-grid{grid-template-columns:1fr;}
    .copyright-row{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
    body{font-size:15px;}
    .main-wrap{padding:20px 12px 40px;}
    .article-card{padding:18px 15px 24px;border-radius:16px;}
    .article-title{font-size:1.5rem;}
    .article-meta{gap:6px 12px;font-size:12px;}
    .meta-divider{display:none;}
    .article-cover img{aspect-ratio:4/3;}
    .related-grid{grid-template-columns:1fr;}
    .btn-group .btn{width:100%;flex-basis:auto;}
    .rel-card{flex-direction:row;align-items:center;}
}
@media (max-width:320px){
    .article-card{padding:16px 12px 20px;}
    .footer-nav a{margin-bottom:8px;}
}

/* roulang page: category1 */
:root{
  --bg1:#05080F;
  --bg2:#0A111E;
  --surface:rgba(13,25,40,.55);
  --surface-strong:rgba(13,27,44,.86);
  --line:rgba(133,171,255,.13);
  --line-bright:rgba(140,190,255,.26);
  --txt:#EAF2FD;
  --muted:#8EA0BC;
  --primary:#33A6FF;
  --second:#2BE0C9;
  --violet:#8F8BFF;
  --coral:#FF7D75;
  --radius:20px;
  --shadow-card:0 20px 50px rgba(0,0,0,.38), 0 0 0 1px rgba(134,175,255,.05);
  --shadow-btn:0 0 26px rgba(43,224,201,.32);
  --maxw:1200px;
}
*{box-sizing:border-box}
html,body{overflow-x:hidden}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:
    radial-gradient(1100px 600px at 12% -8%, rgba(51,166,255,.12), transparent 60%),
    radial-gradient(900px 500px at 96% 108%, rgba(43,224,201,.1), transparent 60%),
    var(--bg1);
  color:var(--txt);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
ul,ol,figure,h1,h2,h3,h4,h5,p{
  margin:0;
  padding:0;
}
ul,ol{list-style:none}
img{display:block;max-width:100%;border:0}
a{color:var(--primary);text-decoration:none;transition:color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease}
button{font-family:inherit}
input,select,textarea{font-family:inherit}
h1,h2,h3,h4,h5{color:var(--txt);line-height:1.3;text-wrap:balance}
:focus-visible{outline:3px solid rgba(43,224,201,.45);outline-offset:2px}
.inner{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,4vw,46px);position:relative;z-index:2}
section{position:relative}

/* App Shell */
.app-shell{min-height:100vh}
.sb-wrap{
  position:fixed;
  left:0;
  top:0;
  z-index:110;
  width:258px;
  height:100vh;
  padding:20px 16px;
  background:rgba(6,11,21,.9);
  border-right:1px solid var(--line);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.sb-head{display:flex;align-items:center;justify-content:space-between;padding:6px 8px 18px}
.sb-brand-mark{
  width:42px;
  height:42px;
  flex:none;
  border-radius:14px;
  background:linear-gradient(135deg,#33A6FF,#2BE0C9);
  color:#05131c;
  font-size:22px;
  font-weight:900;
  display:grid;
  place-items:center;
  box-shadow:0 0 18px rgba(43,224,201,.25);
  position:relative;
  margin-right:12px;
}
.sb-brand-mark i{font-style:normal}
.sb-brand{
  display:flex;
  align-items:center;
  color:var(--txt);
  min-width:0;
}
.sb-brand:hover{color:#fff}
.sb-brand-text{
  font-size:16px;
  font-weight:800;
  line-height:1.3;
  letter-spacing:.02em;
}
.sb-close{
  display:none;
}
.sb-nav{
  margin-top:8px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.sb-nav a{
  display:flex;
  align-items:center;
  gap:13px;
  padding:13px 14px;
  border-radius:13px;
  color:#91A3C6;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  position:relative;
}
.sb-nav a i{
  width:22px;
  text-align:center;
  color:#667A9D;
  transition:color .2s ease;
}
.sb-nav a:hover{
  color:#EFF5FF;
  background:rgba(255,255,255,.04);
  box-shadow:inset 3px 0 0 var(--second);
}
.sb-nav a:hover i{color:var(--second)}
.sb-nav a.is-active{
  color:#fff;
  background:linear-gradient(90deg,rgba(51,166,255,.16),rgba(43,224,201,.05));
  border-color:rgba(140,190,255,.14);
  box-shadow:inset 3px 0 0 var(--second);
}
.sb-nav a.is-active i{color:var(--second)}
.main-panel{
  margin-left:258px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.main-panel > *{flex:none}
.mobile-top{display:none}
.sb-overlay{display:none}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:12px 24px;
  border-radius:999px;
  font-size:15px;
  font-weight:800;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#33A6FF,#2BE0C9);
  color:#03131c;
  border:1px solid rgba(255,255,255,.28);
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(43,224,201,.5), 0 8px 22px rgba(0,0,0,.3);
  color:#020d13;
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 16px rgba(43,224,201,.25)}
.btn-ghost{
  background:rgba(18,32,54,.55);
  color:#E2EDFA;
  border:1px solid var(--line-bright);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.btn-ghost:hover{
  background:rgba(31,53,84,.62);
  border-color:rgba(140,190,255,.5);
  color:#fff;
  transform:translateY(-2px);
}
.btn-lg{min-height:56px;padding:16px 34px;font-size:16px;border-radius:999px}

/* Category Hero */
.cat-hero{
  padding:72px 0 58px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.28;
}
.hero-veil{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(5,8,15,.95) 0%,rgba(5,8,15,.72) 47%,rgba(5,8,15,.32) 100%);
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;
  align-items:center;
  position:relative;
  z-index:3;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:#7B91B3;
  margin-bottom:28px;
  flex-wrap:wrap;
}
.breadcrumb a{color:#A9BBD8}
.breadcrumb a:hover{color:#fff}
.breadcrumb .current-dot{color:#52668A}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:999px;
  background:rgba(43,224,201,.1);
  border:1px solid rgba(43,224,201,.28);
  color:#B6FFEE;
  font-size:13px;
  font-weight:700;
  margin-bottom:24px;
}
.chip i{color:var(--second)}
.cat-h1{
  font-size:clamp(2rem,5vw,3.45rem);
  font-weight:800;
  letter-spacing:.005em;
  line-height:1.16;
  margin-bottom:22px;
}
.cat-lead{
  font-size:17px;
  line-height:1.85;
  color:#B7C7DE;
  max-width:600px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:28px;
}
.hero-note{
  display:flex;
  gap:10px;
  align-items:center;
  font-size:13px;
  color:#7890B0;
}
.hero-note i{color:var(--second)}
.hero-art{
  border-radius:26px;
  border:1px solid rgba(139,180,255,.2);
  background:rgba(10,20,33,.62);
  box-shadow:var(--shadow-card);
  padding:10px;
  transform:rotate(.001deg);
}
.hero-art .inner-media{
  border-radius:18px;
  overflow:hidden;
  background:#0A1422;
}
.hero-art .inner-media img{width:100%;min-height:220px;object-fit:cover}
.hero-art-caption{
  padding:16px 18px 14px;
  display:flex;
  justify-content:space-between;
  gap:14px;
  align-items:center;
  flex-wrap:wrap;
}
.hero-art-caption span{font-size:15px;font-weight:800;color:#E6F0FF}
.hero-art-caption small{color:#7E98B6;font-size:13px}

/* Anchor bar */
.quick-panel{
  margin-top:20px;
  position:relative;
  z-index:4;
}
.quick-bar{
  background:rgba(12,24,40,.62);
  border:1px solid var(--line);
  border-radius:20px;
  padding:12px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.quick-bar .anchor-chip{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:11px 17px;
  border-radius:12px;
  color:#AFBFD8;
  font-size:14px;
  font-weight:700;
  background:rgba(255,255,255,.025);
  border:1px solid transparent;
}
.quick-bar .anchor-chip i{color:#7290C4}
.quick-bar .anchor-chip:hover{
  color:#fff;
  background:rgba(51,166,255,.15);
  border-color:rgba(51,166,255,.3);
  box-shadow:inset 2px 0 0 var(--second);
}
.quick-bar .anchor-chip:hover i{color:var(--second)}

/* Sections */
.content-section{padding:88px 0}
.section-head{margin-bottom:48px}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--second);
  font-size:13px;
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(1.65rem,3vw,2.35rem);
  max-width:720px;
  font-weight:800;
  line-height:1.28;
}
.section-head p{color:var(--muted);margin-top:16px;max-width:660px;font-size:16px;line-height:1.85}
.eyebrow-cyan{
  color:var(--second);
}
.eyebrow-blue{color:var(--primary)}

/* overview grid */
.overview-grid{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:56px;
  align-items:start;
}
.overview-copy .section-head{margin-bottom:18px}
.overview-copy > p{color:#A9BBD5;font-size:16px;line-height:1.9;margin-bottom:22px}
.note-mini{
  border-left:3px solid var(--second);
  background:rgba(43,224,201,.08);
  padding:15px 18px;
  border-radius:0 14px 14px 0;
  color:#C6D7EB;
  font-size:14px;
}
.note-mini i{color:var(--second);margin-right:6px}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  color:var(--primary);
  margin-top:20px;
}
.text-link:hover{color:#fff}
.feature-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.feature-card{
  background:linear-gradient(145deg,rgba(16,30,48,.7),rgba(9,16,29,.58));
  border:1px solid var(--line);
  border-radius:18px;
  padding:24px;
  transition:all .25s ease;
  position:relative;
  overflow:hidden;
}
.feature-card .fc-icon{
  width:42px;
  height:42px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-size:17px;
  background:rgba(51,166,255,.13);
  color:var(--primary);
  margin-bottom:16px;
}
.feature-card h4{font-size:17px;font-weight:750;margin-bottom:8px}
.feature-card p{color:#9AB0CD;font-size:14px;line-height:1.75}
.feature-card:hover{
  background:linear-gradient(145deg,rgba(22,42,70,.8),rgba(10,19,35,.68));
  border-color:rgba(120,180,255,.3);
  transform:translateY(-3px);
  box-shadow:0 6px 24px rgba(0,0,0,.26);
}
.feature-card.echo-blue .fc-icon{background:rgba(43,224,201,.12);color:var(--second)}
.feature-card.echo-purple .fc-icon{background:rgba(143,139,255,.13);color:var(--violet)}
.feature-card-wide{grid-column:span 2;background:linear-gradient(130deg,rgba(32,55,86,.62),rgba(15,31,53,.5));border-color:rgba(113,171,255,.2)}
.feature-card-wide .fc-icon{background:linear-gradient(135deg,rgba(51,166,255,.3),rgba(43,224,201,.2));color:#fff}

/* story showcase */
.story-list{display:flex;flex-direction:column;gap:86px}
.story-grid{
  display:grid;
  grid-template-columns:minmax(0,6fr) minmax(0,6fr);
  gap:56px;
  align-items:center;
}
.story-grid.flip .story-media{order:2}
.story-grid.flip .story-content{order:1}
.story-number{
  font-size:15px;
  font-weight:900;
  color:var(--second);
  letter-spacing:.12em;
  margin-bottom:12px;
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.story-content h3{
  font-size:clamp(1.2rem,2vw,1.8rem);
  margin-bottom:14px;
  font-weight:800;
}
.story-content > p{
  color:#AABED8;
  font-size:16px;
  line-height:1.9;
  margin-bottom:22px;
}
.key-list li{
  color:#BFCEFF;
  font-size:15px;
  padding-left:26px;
  position:relative;
  margin-bottom:12px;
  line-height:1.7;
}
.key-list li::before{
  content:"";
  width:9px;
  height:9px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--second),var(--primary));
  box-shadow:0 0 12px rgba(43,224,201,.7);
  position:absolute;
  left:0;
  top:7px;
}
.story-media{
  border-radius:24px;
  border:1px solid rgba(122,169,230,.2);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  background:#0A1524;
  position:relative;
}
.story-media img{width:100%;min-height:230px;object-fit:cover}
.story-media .media-foot{
  position:absolute;
  left:14px;
  right:14px;
  bottom:14px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:11px 15px;
  border-radius:14px;
  background:rgba(5,11,20,.72);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid rgba(160,190,230,.18);
  color:#C9DAF0;
  font-size:13px;
}
.story-media .media-foot i{color:var(--second);margin-right:5px}

/* scenes */
.scene-section{
  background:linear-gradient(rgba(7,14,25,.55),rgba(7,14,25,.55)),url('/assets/images/backpic/back-2.webp') center/cover;
  background-attachment:fixed;
}
.scene-section .section-head h2,.scene-section .section-head p{color:#E6EEF9}
.scene-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr) minmax(0,1fr);
  gap:20px;
}
.scene-card{
  border-radius:20px;
  border:1px solid var(--line-bright);
  background:rgba(13,25,41,.7);
  padding:30px;
  box-shadow:var(--shadow-card);
  transition:all .25s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(139,198,255,.42)}
.scene-card .sc-icon{
  width:50px;height:50px;
  border-radius:15px;
  display:grid;
  place-items:center;
  font-size:21px;
  color:var(--second);
  background:linear-gradient(135deg,rgba(43,224,201,.18),rgba(51,166,255,.1));
  margin-bottom:18px;
}
.scene-card h4{font-size:18px;margin-bottom:10px}
.scene-card p{color:#A3B7D4;font-size:15px;line-height:1.8;margin-bottom:8px}
.scene-card .mini-line{
  display:block;
  width:36px;height:3px;
  border-radius:4px;
  background:linear-gradient(90deg,var(--second),var(--primary));
  margin-top:14px;
}
.scene-main{
  background:linear-gradient(150deg,rgba(23,48,78,.8),rgba(12,23,39,.75));
}
.scene-main .sc-icon{
  color:var(--primary);
  background:rgba(51,166,255,.2);
}

/* system cards */
.sys-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.sys-card{
  background:linear-gradient(rgba(13,26,41,.75),rgba(8,15,27,.85));
  border:1px solid var(--line);
  border-radius:18px;
  padding:26px 22px;
  transition:all .24s ease;
}
.sys-card i{
  font-size:20px;
  color:var(--violet);
  margin-bottom:16px;
}
.sys-card:nth-child(2) i{color:var(--second)}
.sys-card:nth-child(3) i{color:var(--primary)}
.sys-card:nth-child(4) i{color:#FFC15A}
.sys-card h4{font-size:16px;margin-bottom:9px}
.sys-card p{color:#96ACC8;font-size:14px;line-height:1.75}
.sys-card:hover{transform:translateY(-3px);border-color:rgba(130,190,255,.35);box-shadow:0 10px 32px rgba(0,0,0,.3)}

/* notice */
.notice-panel{
  background:linear-gradient(120deg,rgba(35,49,83,.55),rgba(14,25,42,.68));
  border:1px solid rgba(143,139,255,.28);
  border-radius:22px;
  padding:32px 34px;
  display:flex;
  gap:22px;
  align-items:flex-start;
}
.notice-panel .notice-icon{
  flex:none;
  width:50px;height:50px;
  border-radius:14px;
  display:grid;
  place-items:center;
  font-size:21px;
  background:rgba(143,139,255,.16);
  color:var(--violet);
}
.notice-panel h3{font-size:18px;margin-bottom:9px}
.notice-panel p{color:#AABBD5;font-size:15px;line-height:1.9;margin-bottom:8px}
.notice-panel p strong{color:#DFE9FA;font-weight:800}
.notice-tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.tag{
  padding:6px 12px;
  border-radius:999px;
  background:rgba(51,166,255,.08);
  border:1px solid rgba(51,166,255,.3);
  color:#B7D6FF;
  font-size:12px;
  font-weight:700;
}

/* FAQ */
.faq-wrap{max-width:860px}
.faq-item{
  border:1px solid var(--line);
  border-radius:17px;
  background:rgba(12,24,39,.64);
  overflow:hidden;
  transition:border-color .25s ease, background .25s ease;
}
.faq-item + .faq-item{margin-top:13px}
.faq-item:hover{border-color:rgba(130,190,255,.3)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 22px;
  background:transparent;
  border:0;
  color:#E4EDFA;
  font-size:16px;
  font-weight:750;
  text-align:left;
  cursor:pointer;
}
.faq-icon{
  flex:none;
  width:30px;height:30px;
  border-radius:50%;
  display:grid;
  place-items:center;
  border:1px solid rgba(140,180,255,.26);
  color:var(--second);
  font-weight:900;
  transition:transform .3s ease, background .3s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(43,224,201,.14)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease;
}
.faq-a .faq-inner{
  padding:0 22px 21px;
  color:#98AECB;
  font-size:15px;
  line-height:1.9;
}
.faq-a .faq-inner a{color:var(--primary)}

/* CTA strip */
.cta-strip{
  padding:36px 0 90px;
}
.cta-panel{
  border-radius:26px;
  background:
    linear-gradient(120deg,rgba(20,45,73,.9),rgba(10,25,43,.82)),
    url('/assets/images/backpic/back-3.webp') center/cover;
  padding:46px 42px;
  border:1px solid rgba(104,174,255,.24);
  box-shadow:0 24px 60px rgba(0,0,0,.3);
  text-align:center;
  overflow:hidden;
}
.cta-panel h2{
  font-size:clamp(1.6rem,2.6vw,2.3rem);
  margin-bottom:12px;
  font-weight:850;
}
.cta-panel p{
  color:#A9BEDB;
  max-width:660px;
  margin:0 auto 28px;
  font-size:15px;
}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}

/* footer */
.app-footer{
  margin-top:auto;
  background:#03060B;
  border-top:1px solid rgba(125,160,255,.08);
  padding:40px 0 22px;
}
.footer-row{
  display:flex;
  justify-content:space-between;
  gap:34px;
  align-items:flex-start;
  flex-wrap:wrap;
  padding-bottom:26px;
  border-bottom:1px solid rgba(140,170,255,.1);
}
.footer-brand{
  font-size:19px;
  font-weight:900;
  color:#EAF2FF;
  margin-bottom:10px;
  letter-spacing:.02em;
}
.footer-desc{
  color:#748AA8;
  font-size:14px;
  line-height:1.85;
  max-width:440px;
}
.footer-nav{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  justify-content:flex-end;
  margin-top:12px;
}
.footer-nav a{
  color:#93A7C4;
  padding:8px 12px;
  font-size:14px;
  border-radius:10px;
}
.footer-nav a:hover{
  color:#fff;
  background:rgba(255,255,255,.04);
}
.copyright-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  padding-top:20px;
  color:#5F7395;
  font-size:13px;
}
.legacy-links{display:flex;gap:4px;flex-wrap:wrap}
.legacy-links a{
  color:#7189AA;
  padding:5px 10px;
  border-radius:8px;
}
.legacy-links a:hover{color:#fff}

/* responsive */
@media (max-width: 1180px){
  .hero-grid{gap:30px}
  .story-grid{gap:30px}
  .overview-grid{gap:36px}
  .overview-grid{grid-template-columns:minmax(0,1fr)}
  .overview-copy .section-head{margin-bottom:20px}
}
@media (max-width: 1023px){
  .sb-wrap{
    transform:translateX(-104%);
    width:286px;
    box-shadow:18px 0 44px rgba(0,0,0,.4);
    transition:transform .28s ease;
  }
  .sb-wrap.is-open{transform:translateX(0)}
  .sb-close{
    display:grid;
    width:34px;height:34px;
    place-items:center;
    color:#fff;
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    border-radius:9px;
    cursor:pointer;
  }
  .sb-overlay.is-show{
    display:block;
    position:fixed;
    inset:0;
    background:rgba(3,6,12,.68);
    backdrop-filter:blur(3px);
    -webkit-backdrop-filter:blur(3px);
    z-index:105;
  }
  .mobile-top{
    position:sticky;
    top:0;
    z-index:100;
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:60px;
    padding:0 18px;
    background:rgba(5,9,17,.88);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .mobile-logo{
    color:#EAF3FF;
    font-size:17px;
    font-weight:850;
    letter-spacing:.02em;
  }
  .menu-open{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;
    height:42px;
    color:#fff;
    background:rgba(255,255,255,.04);
    border:1px solid var(--line);
    border-radius:11px;
    font-size:18px;
    cursor:pointer;
  }
  .main-panel{margin-left:0}
  .hero-grid{grid-template-columns:1fr}
  .hero-art{max-width:560px}
  .hero-bg{opacity:.18}
  .hero-veil{background:linear-gradient(rgba(4,7,13,.8),rgba(5,8,15,.5))}
  .content-section{padding:64px 0}
  .story-list{gap:64px}
  .story-grid,
  .story-grid.flip{grid-template-columns:1fr;gap:26px}
  .story-grid.flip .story-media{order:0}
  .story-media img{max-height:300px}
  .scene-grid{grid-template-columns:1fr}
  .sys-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
}
@media (max-width: 639px){
  .mobile-logo{font-size:16px}
  .cat-hero{padding-top:52px;padding-bottom:36px}
  .cat-h1{font-size:2rem}
  .cat-lead{font-size:15px}
  .hero-actions .btn{width:100%;white-space:normal}
  .quick-bar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-bottom:8px}
  .quick-bar::-webkit-scrollbar{display:none}
  .quick-bar .anchor-chip{flex:none;padding:10px 14px}
  .feature-list{grid-template-columns:1fr}
  .feature-card-wide{grid-column:auto}
  .sys-grid{grid-template-columns:1fr}
  .notice-panel{flex-direction:column;padding:26px 22px}
  .cta-panel{padding:34px 20px}
  .footer-row{flex-direction:column;gap:14px}
  .footer-nav{justify-content:flex-start;margin-top:2px}
  .copyright-row{flex-direction:column;align-items:flex-start}
  .cta-actions .btn{width:100%;white-space:normal}
  .faq-q{padding:17px 16px;font-size:15px}
  .faq-a .faq-inner{padding:0 16px 16px;font-size:14px}
}

/* roulang page: category2 */
:root {
            --bg: #05080f;
            --bg-panel: rgba(13, 29, 45, 0.72);
            --bg-solid: #0b1724;
            --border: rgba(138, 178, 255, 0.12);
            --txt: #e9f0fa;
            --muted: #8da0bc;
            --blue: #33a6ff;
            --cyan: #2be0c9;
            --violet: #8f8bff;
            --coral: #ff7d75;
            --r-lg: 22px;
            --r-md: 14px;
            --r-sm: 9px;
            --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
            --glow: 0 0 24px rgba(43, 224, 201, 0.35);
            --radius-btn: 999px;
            --space-section: 92px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--txt);
            background:
                radial-gradient(640px 320px at 88% -4%, rgba(43, 224, 201, 0.09), transparent 60%),
                radial-gradient(900px 420px at 6% 0%, rgba(51, 166, 255, 0.13), transparent 55%),
                #05080f;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        ul,
        ol,
        p,
        figure {
            margin: 0;
        }

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

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        button,
        input {
            font-family: inherit;
            border: 0;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .app-sidebar {
            width: 264px;
            flex: 0 0 264px;
            position: sticky;
            top: 0;
            height: 100vh;
            display: flex;
            flex-direction: column;
            padding: 28px 20px 24px;
            background: rgba(4, 8, 15, 0.86);
            border-right: 1px solid rgba(140, 180, 255, 0.1);
            backdrop-filter: blur(16px);
            z-index: 60;
        }

        .brand-block {
            display: flex;
            align-items: center;
            gap: 13px;
            padding: 6px 6px 20px;
            border-bottom: 1px solid rgba(140, 180, 255, 0.08);
            margin-bottom: 18px;
            border-radius: 0 0 14px 14px;
        }

        .brand-logo {
            width: 46px;
            height: 46px;
            border-radius: 15px;
            background: linear-gradient(135deg, #1f7cd8, #20c7b8);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            font-weight: 900;
            color: #0a151f;
            box-shadow: 0 0 22px rgba(43, 224, 201, 0.3), inset 0 0 8px rgba(255, 255, 255, 0.25);
            position: relative;
        }

        .brand-logo::after {
            content: "";
            position: absolute;
            left: 4px;
            right: 4px;
            bottom: 7px;
            height: 3px;
            border-radius: 2px;
            background: rgba(255, 255, 255, 0.5);
        }

        .brand-copy {
            display: flex;
            flex-direction: column;
            font-weight: 800;
            line-height: 1.25;
        }

        .brand-copy strong {
            font-size: 19px;
            letter-spacing: 0.5px;
        }

        .brand-copy small {
            font-size: 13px;
            font-weight: 600;
            color: var(--muted);
            letter-spacing: 0.2em;
            margin-top: 3px;
        }

        .sb-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .sb-nav a {
            display: flex;
            align-items: center;
            gap: 13px;
            height: 48px;
            padding: 0 14px;
            border-radius: 13px;
            font-size: 15px;
            font-weight: 600;
            color: rgba(233, 240, 250, 0.72);
            transition: all 0.24s ease;
            position: relative;
        }

        .sb-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: #6e8bab;
        }

        .sb-nav a:hover {
            color: var(--txt);
            background: rgba(51, 166, 255, 0.08);
        }

        .sb-nav a.is-active {
            color: #ffffff;
            background: linear-gradient(120deg, rgba(51, 166, 255, 0.14), rgba(43, 224, 201, 0.08));
            box-shadow: inset 0 0 0 1px rgba(51, 166, 255, 0.22);
        }

        .sb-nav a.is-active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 3px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--blue), var(--cyan));
            box-shadow: 0 0 10px rgba(43, 224, 201, 0.7);
        }

        .sb-nav a.is-active i {
            color: var(--cyan);
        }

        .side-foot {
            padding-top: 18px;
            border-top: 1px solid rgba(140, 180, 255, 0.08);
            display: flex;
            gap: 13px;
            flex-wrap: wrap;
            font-size: 12px;
            color: #5d7290;
        }

        .side-foot a {
            color: #5d7290;
            transition: color 0.2s;
        }

        .side-foot a:hover {
            color: var(--cyan);
        }

        .app-stage {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .mobile-header {
            display: none;
            height: 62px;
            align-items: center;
            justify-content: space-between;
            padding: 0 22px;
            background: rgba(5, 8, 15, 0.86);
            border-bottom: 1px solid rgba(140, 180, 255, 0.08);
            position: sticky;
            top: 0;
            z-index: 75;
            backdrop-filter: blur(14px);
        }

        .mobile-brand {
            font-size: 17px;
            font-weight: 800;
        }

        .mobile-brand .dot {
            color: var(--cyan);
        }

        .drawer-open-btn {
            width: 42px;
            height: 42px;
            border-radius: 11px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--txt);
            background: rgba(51, 166, 255, 0.12);
            border: 1px solid rgba(51, 166, 255, 0.22);
        }

        .drawer-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.56);
            z-index: 85;
            opacity: 0;
            transition: opacity 0.25s;
        }

        .drawer-backdrop.is-open {
            opacity: 1;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 280px;
            background: #07111c;
            padding: 26px 18px;
            transform: translateX(-102%);
            transition: transform 0.3s ease;
            z-index: 90;
            display: flex;
            flex-direction: column;
            box-shadow: 12px 0 38px rgba(0, 0, 0, 0.3);
        }

        .mobile-drawer.is-open {
            transform: translateX(0);
        }

        .drawer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 2px 8px 20px;
            border-bottom: 1px solid rgba(140, 180, 255, 0.08);
            margin-bottom: 14px;
        }

        .drawer-brand .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, #33a6ff, #2be0c9);
            display: grid;
            place-items: center;
            font-size: 21px;
            font-weight: 900;
            color: #04121a;
        }

        .drawer-brand strong {
            font-size: 17px;
            line-height: 1.3;
        }

        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 46px;
            padding: 0 12px;
            border-radius: 12px;
            color: rgba(233, 240, 250, 0.74);
            font-weight: 600;
            font-size: 15px;
        }

        .drawer-nav a i {
            width: 20px;
            color: #6e8bab;
        }

        .drawer-nav a.is-active {
            color: #fff;
            background: linear-gradient(120deg, rgba(51, 166, 255, 0.16), rgba(43, 224, 201, 0.08));
        }

        .drawer-nav a.is-active i {
            color: var(--cyan);
        }

        .drawer-nav a:hover {
            background: rgba(51, 166, 255, 0.08);
            color: #fff;
        }

        .drawer-close {
            height: 44px;
            border-radius: 11px;
            font-size: 14px;
            color: var(--muted);
            border: 1px solid rgba(140, 180, 255, 0.12);
            margin-top: 14px;
        }

        .content-wrap {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 26px;
            padding-right: 26px;
        }

        .page-main {
            width: 100%;
            flex: 1;
            overflow: hidden;
        }

        .section {
            padding-top: var(--space-section);
            padding-bottom: var(--space-section);
            position: relative;
        }

        .section.kbd-section,
        .section.soft-section {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .cat-hero {
            position: relative;
            display: flex;
            align-items: center;
            min-height: 470px;
            padding: 76px 0 70px;
            overflow: hidden;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, rgba(5, 8, 15, 0.95) 0%, rgba(5, 8, 15, 0.8) 44%, rgba(8, 24, 40, 0.52) 100%),
                url("/assets/images/backpic/back-2.webp") center / cover no-repeat;
        }

        .cat-hero::after {
            content: "";
            position: absolute;
            width: 560px;
            height: 300px;
            left: 32%;
            top: -60px;
            background: radial-gradient(circle, rgba(51, 166, 255, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cat-hero .content-wrap {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .crumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #8da0bc;
            font-size: 13px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .crumb a {
            color: rgba(233, 240, 250, 0.8);
        }

        .crumb a:hover {
            color: var(--cyan);
        }

        .crumb i {
            font-size: 11px;
            color: #4f6a88;
        }

        .eyebrow {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.18em;
            color: var(--cyan);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 13px;
            border-radius: 999px;
            background: rgba(43, 224, 201, 0.09);
            border: 1px solid rgba(43, 224, 201, 0.2);
            margin-bottom: 24px;
        }

        .cat-hero h1 {
            font-size: clamp(2rem, 4.6vw, 3.5rem);
            line-height: 1.18;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 22px;
            max-width: 760px;
        }

        .cat-hero h1 .highlight {
            background: linear-gradient(135deg, #8fdeff, #66eff0);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            line-height: 1.9;
            color: var(--muted);
            max-width: 660px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 38px;
            color: #94a6bc;
            font-size: 13px;
        }

        .hero-meta i {
            color: var(--cyan);
            margin-right: 6px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            white-space: nowrap;
            transition: all 0.23s ease;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(120deg, var(--blue), var(--cyan));
            color: #051019;
            box-shadow: 0 0 24px rgba(43, 224, 201, 0.28), 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-primary:hover {
            box-shadow: 0 0 34px rgba(43, 224, 201, 0.5), 0 14px 28px rgba(0, 0, 0, 0.28);
            transform: translateY(-2px);
        }

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

        .btn-ghost {
            background: rgba(13, 29, 45, 0.55);
            border-color: rgba(138, 178, 255, 0.2);
            color: var(--txt);
            backdrop-filter: blur(12px);
        }

        .btn-ghost:hover {
            border-color: rgba(43, 224, 201, 0.6);
            background: rgba(43, 224, 201, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-large {
            height: 58px;
            padding: 0 34px;
            font-size: 17px;
        }

        .btn i {
            font-size: 17px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        .glass-card {
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: var(--r-lg);
            box-shadow: var(--shadow);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .note-card {
            height: 100%;
            border-radius: 20px;
            background: rgba(10, 23, 40, 0.7);
            border: 1px solid rgba(138, 178, 255, 0.1);
            padding: 28px;
            transition: transform 0.25s, border 0.25s, box-shadow 0.25s;
            position: relative;
            overflow: hidden;
        }

        .note-card::after {
            content: "";
            position: absolute;
            width: 90px;
            height: 90px;
            right: -30px;
            top: -30px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(143, 139, 255, 0.14), transparent 70%);
        }

        .note-card:hover {
            transform: translateY(-4px);
            border-color: rgba(143, 139, 255, 0.35);
            box-shadow: 0 14px 40px rgba(0, 0, 0, 0.24);
        }

        .note-card .note-icon {
            width: 46px;
            height: 46px;
            display: grid;
            place-items: center;
            border-radius: 13px;
            font-size: 18px;
            background: rgba(51, 166, 255, 0.13);
            color: var(--cyan);
            margin-bottom: 16px;
        }

        .note-card:first-child .note-icon {
            color: #9cd8ff;
            background: rgba(51, 166, 255, 0.14);
        }

        .note-card:nth-child(2) .note-icon {
            color: var(--cyan);
            background: rgba(43, 224, 201, 0.13);
        }

        .note-card:nth-child(3) .note-icon {
            color: #c6c2ff;
            background: rgba(143, 139, 255, 0.15);
        }

        .note-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .note-card p {
            font-size: 14px;
            color: #94a7c2;
            line-height: 1.75;
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 42px;
        }

        .section-kicker {
            font-size: 13px;
            color: var(--cyan);
            letter-spacing: 0.16em;
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            line-height: 1.28;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .section-desc {
            color: var(--muted);
            font-size: 15.5px;
            line-height: 1.85;
        }

        .step-column {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: relative;
            padding-left: 15px;
        }

        .step-line {
            position: absolute;
            left: 6px;
            top: 28px;
            bottom: 28px;
            width: 1px;
            background: linear-gradient(180deg, rgba(51, 166, 255, 0.5), rgba(43, 224, 201, 0.24), transparent);
        }

        .step-card {
            background: rgba(9, 22, 37, 0.7);
            border: 1px solid rgba(138, 178, 255, 0.12);
            border-radius: 20px;
            padding: 24px 26px;
            display: flex;
            gap: 20px;
            transition: all 0.3s ease;
            position: relative;
        }

        .step-card:hover {
            border-color: rgba(51, 166, 255, 0.45);
            background: rgba(10, 28, 48, 0.76);
            transform: translateY(-3px);
            box-shadow: 0 18px 42px rgba(0, 0, 0, 0.24);
        }

        .step-num {
            flex-shrink: 0;
            width: 54px;
            height: 54px;
            display: grid;
            place-items: center;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(51, 166, 255, 0.2), rgba(43, 224, 201, 0.18));
            border: 1px solid rgba(80, 180, 255, 0.3);
            font-weight: 800;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 0 20px rgba(51, 166, 255, 0.12);
        }

        .step-card:nth-child(2) .step-num {
            border-color: rgba(43, 224, 201, 0.35);
        }

        .step-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-body p {
            font-size: 14px;
            color: #93a4c0;
            line-height: 1.85;
        }

        .step-tag {
            display: inline-flex;
            margin-top: 12px;
            font-size: 12px;
            color: var(--cyan);
            background: rgba(43, 224, 201, 0.1);
            padding: 5px 10px;
            border-radius: 999px;
            border: 1px solid rgba(43, 224, 201, 0.2);
        }

        .aside-card {
            background: rgba(12, 27, 45, 0.84);
            border: 1px solid rgba(143, 139, 255, 0.22);
            border-radius: 22px;
            padding: 30px;
            position: sticky;
            top: 40px;
            box-shadow: 0 24px 54px rgba(0, 0, 0, 0.26);
            backdrop-filter: blur(12px);
        }

        .aside-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .aside-card h3 i {
            color: var(--cyan);
        }

        .aside-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .aside-list li {
            display: flex;
            gap: 10px;
            font-size: 14px;
            color: #a6b8d1;
            align-items: flex-start;
        }

        .aside-list li i {
            color: var(--cyan);
            margin-top: 4px;
            font-size: 13px;
        }

        .aside-card .card-foot {
            margin-top: 22px;
            padding-top: 16px;
            border-top: 1px solid rgba(140, 180, 255, 0.1);
            font-size: 13px;
            color: #7c8ca5;
            display: flex;
            gap: 8px;
        }

        .system-section {
            background: linear-gradient(180deg, rgba(7, 16, 29, 0.56), rgba(5, 8, 15, 0.1));
        }

        .spec-card {
            background: rgba(8, 21, 36, 0.7);
            border: 1px solid rgba(138, 178, 255, 0.12);
            border-radius: 20px;
            padding: 26px 22px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: all 0.25s;
        }

        .spec-card::before {
            content: "";
            position: absolute;
            width: 160%;
            height: 70px;
            top: -40px;
            left: -30%;
            background: radial-gradient(circle, rgba(51, 166, 255, 0.16), transparent 70%);
        }

        .spec-card:hover {
            transform: translateY(-5px);
            border-color: rgba(51, 166, 255, 0.42);
            box-shadow: 0 16px 42px rgba(0, 0, 0, 0.25);
        }

        .spec-icon {
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            border-radius: 13px;
            background: rgba(51, 166, 255, 0.14);
            font-size: 18px;
            color: var(--cyan);
            margin-bottom: 14px;
        }

        .spec-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .spec-card p {
            font-size: 13.5px;
            color: #8fa1bc;
            line-height: 1.75;
        }

        .download-panel {
            background: rgba(10, 24, 41, 0.82);
            border: 1px solid rgba(138, 178, 255, 0.16);
            border-radius: 28px;
            padding: 42px;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(14px);
            box-shadow: 0 28px 60px rgba(0, 0, 0, 0.24);
        }

        .download-panel::after {
            content: "";
            position: absolute;
            right: -120px;
            bottom: -170px;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(43, 224, 201, 0.18), transparent 66%);
        }

        .download-panel .panel-head h2 {
            font-size: 24px;
            margin-bottom: 13px;
            font-weight: 800;
        }

        .download-panel .panel-head p {
            color: var(--muted);
            font-size: 15px;
            margin-bottom: 30px;
            max-width: 560px;
        }

        .download-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 34px;
        }

        .download-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: rgba(20, 38, 61, 0.55);
            padding: 12px 14px;
            border-radius: 13px;
            border: 1px solid rgba(138, 178, 255, 0.1);
            font-size: 14px;
            color: #c3d1e2;
        }

        .download-list li i {
            color: var(--cyan);
            margin-top: 3px;
        }

        .btn-row {
            display: flex;
            flex-wrap: wrap;
            gap: 13px;
        }

        .device-wrap {
            position: relative;
            max-width: 440px;
            margin-left: auto;
        }

        .device-frame {
            background: linear-gradient(145deg, rgba(20, 39, 62, 0.8), rgba(7, 15, 28, 0.9));
            border: 1px solid rgba(143, 139, 255, 0.26);
            padding: 12px;
            border-radius: 34px;
            box-shadow: 0 34px 70px rgba(0, 0, 0, 0.44), 0 0 0 1px rgba(140, 180, 255, 0.14);
        }

        .device-screen {
            border-radius: 24px;
            overflow: hidden;
            background: #0b121e;
        }

        .device-screen img {
            width: 100%;
            min-height: 260px;
            object-fit: cover;
        }

        .device-caption {
            text-align: center;
            font-size: 13px;
            color: #7f91aa;
            margin-top: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .device-caption i {
            color: var(--cyan);
        }

        .check-grid .check-cell {
            margin-bottom: 22px;
        }

        .check-card {
            background: rgba(10, 23, 38, 0.6);
            border: 1px solid rgba(138, 178, 255, 0.12);
            border-radius: 18px;
            padding: 20px;
            height: 100%;
            display: flex;
            gap: 13px;
            transition: all 0.2s;
        }

        .check-card:hover {
            border-color: rgba(43, 224, 201, 0.4);
        }

        .check-icon {
            flex: 0 0 38px;
            height: 38px;
            display: grid;
            place-items: center;
            border-radius: 11px;
            background: rgba(43, 224, 201, 0.11);
            color: var(--cyan);
            font-size: 15px;
        }

        .check-card h3 {
            font-size: 14.5px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .check-card p {
            font-size: 13px;
            color: #8094af;
            line-height: 1.7;
        }

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

        .acc-item {
            border-radius: 17px;
            background: rgba(9, 22, 38, 0.76);
            border: 1px solid rgba(138, 178, 255, 0.1);
            overflow: hidden;
            transition: border 0.25s;
        }

        .acc-item.open {
            border-color: rgba(51, 166, 255, 0.36);
        }

        .acc-head {
            width: 100%;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            align-items: center;
            padding: 20px 22px;
            text-align: left;
            font-size: 15.5px;
            font-weight: 700;
            color: var(--txt);
            background: transparent;
            transition: color 0.2s;
        }

        .acc-head:hover {
            color: #fff;
        }

        .acc-head i {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: grid;
            place-items: center;
            background: rgba(51, 166, 255, 0.11);
            border-radius: 8px;
            font-size: 13px;
            color: var(--cyan);
            transition: transform 0.3s;
        }

        .acc-item.open .acc-head i {
            transform: rotate(180deg);
        }

        .acc-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .acc-body {
            padding: 0 22px 20px 22px;
            font-size: 14px;
            color: #92a5c0;
            line-height: 1.8;
            border-left: 3px solid transparent;
        }

        .acc-item.open .acc-body {
            border-left-color: var(--cyan);
        }

        .final-cta {
            background: linear-gradient(180deg, rgba(9, 20, 36, 0.55), rgba(6, 10, 18, 0.4));
        }

        .cta-box {
            position: relative;
            border-radius: 28px;
            padding: 38px 42px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            overflow: hidden;
            border: 1px solid rgba(43, 224, 201, 0.22);
            background:
                linear-gradient(135deg, rgba(13, 29, 45, 0.74), rgba(9, 22, 38, 0.92)),
                url("/assets/images/coverpic/cover-4.webp") center / cover no-repeat;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            width: 240px;
            height: 240px;
            right: 10%;
            top: -100px;
            background: radial-gradient(circle, rgba(51, 166, 255, 0.28), transparent 70%);
        }

        .cta-copy {
            position: relative;
            z-index: 2;
        }

        .cta-copy h2 {
            font-size: 24px;
            margin-bottom: 8px;
            font-weight: 800;
        }

        .cta-copy p {
            color: var(--muted);
            font-size: 14.5px;
        }

        .cta-btn {
            position: relative;
            z-index: 2;
        }

        .app-footer {
            margin-top: 40px;
            padding: 30px 0 26px;
            background: #03060c;
            border-top: 1px solid rgba(138, 178, 255, 0.1);
            color: #6f84a2;
            font-size: 13px;
        }

        .app-footer .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 26px;
        }

        .footer-brand {
            color: var(--txt);
            font-size: 21px;
            font-weight: 800;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand::before {
            content: "9";
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            background: linear-gradient(120deg, var(--blue), var(--cyan));
            color: #071018;
            font-weight: 900;
            margin-right: 4px;
        }

        .footer-desc {
            max-width: 520px;
            margin-top: 8px;
            line-height: 1.8;
            font-size: 13px;
        }

        .footer-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: flex-end;
            gap: 22px;
        }

        .footer-nav a {
            color: #9aabc3;
            transition: color 0.2s, border-color 0.2s;
            padding-bottom: 2px;
            border-bottom: 1px solid transparent;
        }

        .footer-nav a:hover {
            color: var(--cyan);
            border-bottom-color: rgba(43, 224, 201, 0.4);
        }

        .copyright-row {
            margin-top: 22px;
            padding-top: 18px;
            border-top: 1px solid rgba(138, 178, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        .legacy-links {
            display: flex;
            gap: 17px;
        }

        .legacy-links a {
            color: #657a98;
            font-size: 12px;
        }

        .legacy-links a:hover {
            color: var(--cyan);
        }

        @media (max-width: 1120px) {
            .app-sidebar {
                width: 230px;
                flex-basis: 230px;
            }
            :root {
                --space-section: 76px;
            }
            .brand-copy strong {
                font-size: 17px;
            }
            .download-panel {
                padding: 30px;
            }
        }

        @media (max-width: 1023px) {
            .app-sidebar {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .app-shell {
                display: block;
            }
            :root {
                --space-section: 60px;
            }
            .cat-hero {
                min-height: 420px;
                padding: 54px 0 48px;
            }
            .content-wrap {
                padding-left: 20px;
                padding-right: 20px;
            }
            .aside-card {
                position: static;
                margin-top: 26px;
            }
            .download-panel {
                margin-top: 26px;
            }
            .device-wrap {
                margin-left: 0;
                max-width: 440px;
            }
            .cta-box {
                padding: 28px 26px;
            }
        }

        @media (max-width: 639px) {
            :root {
                --space-section: 46px;
            }
            .cat-hero h1 {
                font-size: 31px;
                line-height: 1.3;
            }
            .hero-sub {
                font-size: 15.5px;
            }
            .btn-large {
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-head {
                margin-bottom: 24px;
            }
            .note-card {
                padding: 22px;
            }
            .step-card {
                flex-direction: row;
                padding: 20px 16px;
                gap: 14px;
            }
            .step-num {
                width: 46px;
                height: 46px;
                font-size: 16px;
                border-radius: 13px;
            }
            .step-body h3 {
                font-size: 16px;
            }
            .download-panel {
                padding: 22px 18px;
                border-radius: 20px;
            }
            .download-panel .panel-head h2 {
                font-size: 20px;
            }
            .footer-nav {
                justify-content: flex-start;
                gap: 14px;
            }
            .cta-box {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-copy h2 {
                font-size: 21px;
            }
            .app-footer .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .copyright-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .legacy-links {
                flex-wrap: wrap;
            }
            .acc-head {
                padding: 17px 15px;
                font-size: 14.5px;
            }
            .acc-body {
                padding-left: 15px;
                padding-right: 15px;
            }
        }