/* roulang page: index */
:root {
            --bg-primary: #0a1424;
            --bg-deep: #0d1b2e;
            --bg-panel: rgba(15, 25, 40, 0.72);
            --brand-blue: #2d8cf0;
            --brand-cyan: #36cfc9;
            --accent: #ffb800;
            --text-main: #e6edf5;
            --text-muted: #8ea3b9;
            --text-weak: #5b7088;
            --link: #52a7ff;
            --link-hover: #6bc2ff;
            --border: rgba(255, 255, 255, 0.1);
            --border-light: rgba(255, 255, 255, 0.16);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.22);
            --shadow-lg: 0 12px 26px rgba(0, 0, 0, 0.26);
            --ts: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --header-h: 64px;
            --spacer: 90px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.7;
            letter-spacing: 0.2px;
            -webkit-font-smoothing: antialiased;
        }
        body.no-scroll {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--link);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--link-hover);
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding: var(--spacer) 0;
        }
        .section-inner {
            padding-top: 18px;
        }
        .row {
            max-width: 1200px;
        }

        /* --------------------------------------------------------- */
        /* 顶部信息条 */
        /* --------------------------------------------------------- */
        .topbar {
            background: rgba(2, 8, 18, 0.9);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 8px 0;
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.4px;
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .topbar-status {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .status-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--brand-cyan);
            box-shadow: 0 0 10px rgba(54, 207, 201, 0.6);
        }
        .topbar-links {
            display: flex;
            gap: 24px;
            color: var(--text-muted);
        }
        .topbar-links span {
            color: var(--text-weak);
        }

        /* 导航 */
        /* --------------------------------------------------------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(10, 20, 36, 0.6);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }
        .site-header.is-scrolled {
            background: rgba(6, 14, 28, 0.92);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
        }
        .header-inner {
            height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 11px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 18px rgba(45, 140, 240, 0.35);
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.12;
            pointer-events: none;
        }
        .logo-text .lg-line1 {
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.6px;
        }
        .logo-text .lg-line2 {
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-cyan);
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 10px 14px;
            color: rgba(230, 237, 245, 0.86);
            font-size: 15px;
            font-weight: 500;
            border-radius: 6px;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .nav-link:hover {
            color: #71c9ff;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-link.active {
            color: #5baaff;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 1px;
            background: linear-gradient(90deg, var(--brand-blue), var(--brand-cyan));
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .htel {
            color: var(--text-muted);
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .htel svg {
            width: 16px;
            height: 16px;
            stroke: #5baaff;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            line-height: 1;
            transition: all 0.25s ease;
            cursor: pointer;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn-primary {
            color: #fff;
            background: linear-gradient(135deg, #2d8cf0, #36cfc9);
            box-shadow: 0 0 18px rgba(45, 140, 240, 0.28);
        }
        .btn-primary:hover {
            color: #fff;
            filter: brightness(1.08);
            box-shadow: 0 0 26px rgba(45, 140, 240, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.28);
            color: rgba(255, 255, 255, 0.9);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: #52a7ff;
            color: #fff;
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: 1px solid var(--brand-blue);
            outline-offset: 3px;
        }
        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s ease;
        }
        .link-arrow .arrow-icon {
            width: 16px;
            height: 16px;
            transition: transform 0.25s ease;
        }
        .link-arrow:hover .arrow-icon {
            transform: translateX(5px);
        }

        /* 汉堡按钮 */
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 9px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            background: transparent;
            position: relative;
            cursor: pointer;
        }
        .menu-toggle span {
            position: absolute;
            left: 11px;
            right: 11px;
            height: 2px;
            border-radius: 2px;
            background: #fff;
            opacity: 0.9;
            transition: 0.3s ease;
        }
        .menu-toggle span:nth-child(1) {
            top: 13px;
        }
        .menu-toggle span:nth-child(2) {
            top: 20px;
        }
        .menu-toggle span:nth-child(3) {
            top: 27px;
        }
        .menu-toggle.is-open span:nth-child(1) {
            top: 20px;
            transform: rotate(45deg);
        }
        .menu-toggle.is-open span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.is-open span:nth-child(3) {
            top: 20px;
            transform: rotate(-45deg);
        }

        /* Hero */
        /* --------------------------------------------------------- */
        .hero {
            position: relative;
            min-height: min(100vh, 920px);
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            overflow: hidden;
            background: var(--bg-primary);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 72% 40%, rgba(45, 140, 240, 0.22), transparent 45%), rgba(8, 16, 30, 0.72);
        }
        .hero-grid-overlay {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 72px 72px;
            xpointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 1100px;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 7px 16px;
            border-radius: 999px;
            background: rgba(12, 25, 46, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.18);
            font-size: 13px;
            color: #94c8ff;
            letter-spacing: 1px;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }
        .hero-eyebrow .pulse {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-cyan);
            box-shadow: 0 0 0 0 rgba(54, 207, 201, 0.5);
            animation: pulse 2.4s infinite;
        }
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(54, 207, 201, 0.5);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(54, 207, 201, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(54, 207, 201, 0);
            }
        }
        .hero h1 {
            font-size: clamp(38px, 5vw + 18px, 58px);
            line-height: 1.16;
            font-weight: 800;
            letter-spacing: 1px;
            color: #fff;
            margin-bottom: 18px;
            text-shadow: 0 4px 22px rgba(0, 0, 0, 0.4);
        }
        .hero h1 .hero-brand {
            background: linear-gradient(135deg, #52a7ff, #36cfc9);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-sub {
            max-width: 720px;
            margin: 0 auto 36px;
            font-size: 17px;
            line-height: 1.8;
            color: rgba(210, 225, 240, 0.9);
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-chips {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px 26px;
            margin-top: 40px;
            padding: 12px 24px;
            border-radius: 999px;
            background: rgba(15, 23, 42, 0.46);
            border: 1px solid rgba(255, 255, 255, 0.13);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            width: fit-content;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-chips span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.4px;
        }
        .hero-chips svg {
            width: 16px;
            height: 16px;
            color: var(--brand-cyan);
        }
        .scroll-down {
            position: absolute;
            bottom: 26px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 5;
            width: 26px;
            height: 42px;
            opacity: 0.7;
            display: flex;
            justify-content: center;
            padding-top: 8px;
        }
        .scroll-down .mouse-line {
            width: 1px;
            height: 26px;
            background: rgba(255, 255, 255, 0.4);
            position: relative;
            overflow: hidden;
        }
        .scroll-down .mouse-line::after {
            content: "";
            display: block;
            width: 100%;
            height: 8px;
            background: #6bc2ff;
            animation: scrollHint 1.8s ease-in-out infinite;
        }
        @keyframes scrollHint {
            0% {
                transform: translateY(-8px);
            }
            100% {
                transform: translateY(26px);
            }
        }

        /* 通用板块小标 */
        .section-head {
            margin-bottom: 46px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-head .kicker {
            display: block;
            font-size: 13px;
            letter-spacing: 2px;
            color: var(--brand-cyan);
            margin-bottom: 8px;
            font-weight: 600;
            text-transform: uppercase;
        }
        .section-head h2 {
            font-size: clamp(26px, 2.4vw + 16px, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: #f2f6fa;
            position: relative;
            padding-left: 22px;
        }
        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 3px;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--brand-blue), var(--brand-cyan));
            box-shadow: 0 0 14px rgba(45, 140, 240, 0.5);
        }
        .section-head .section-desc {
            max-width: 440px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* 快捷服务卡片 */
        /* --------------------------------------------------------- */
        .quick-section {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .feature-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .feature-card {
            position: relative;
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px 24px;
            min-height: 228px;
            overflow: hidden;
            transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
        }
        .feature-card::after {
            content: "kaiyun官方网站入口";
            position: absolute;
            right: -2px;
            bottom: -8px;
            font-size: 20px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.05);
            letter-spacing: 0.4px;
            pointer-events: none;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(82, 167, 255, 0.5);
            background: rgba(255, 255, 255, 0.06);
        }
        .feature-icon {
            width: 46px;
            height: 46px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(45, 140, 240, 0.18);
            color: #6bb9ff;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .feature-card:nth-child(2) .feature-icon {
            background: rgba(54, 207, 201, 0.15);
            color: var(--brand-cyan);
        }
        .feature-card:nth-child(3) .feature-icon {
            background: rgba(255, 184, 0, 0.13);
            color: #ffc53d;
        }
        .feature-card h3 {
            font-size: 18px;
            margin-bottom: 11px;
            font-weight: 700;
            color: #eef2f6;
        }
        .feature-card p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .feature-card .card-link {
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.65);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: color 0.2s ease;
        }
        .feature-card .card-link .arrow-white {
            width: 14px;
            height: 14px;
        }
        .feature-card:hover .card-link {
            color: #6bc2ff;
        }

        /* 混合内容展示 */
        /* --------------------------------------------------------- */
        .showcase-row {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            align-items: center;
            gap: 40px;
            margin-bottom: 74px;
        }
        .showcase-row:last-child {
            margin-bottom: 0;
        }
        .showcase-media {
            grid-column: span 7;
            position: relative;
            border-radius: 18px;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #0d1b2e;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .showcase-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .media-badge {
            position: absolute;
            left: 18px;
            top: 18px;
            padding: 7px 16px;
            background: rgba(8, 15, 28, 0.7);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 999px;
            font-size: 12px;
            color: #cbe4ff;
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .media-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand-cyan);
        }
        .showcase-body {
            grid-column: span 5;
        }
        .showcase-row.row-reverse .showcase-media {
            grid-column: 6 / span 7;
            grid-row: 1;
        }
        .showcase-row.row-reverse .showcase-body {
            grid-column: 1 / span 5;
            grid-row: 1;
        }
        .showcase-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 700;
            color: var(--brand-cyan);
            letter-spacing: 1.8px;
            margin-bottom: 12px;
        }
        .showcase-body h2 {
            font-size: clamp(23px, 2vw + 16px, 31px);
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 18px;
            color: #f2f5f8;
        }
        .showcase-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 22px;
        }
        .check-points {
            list-style: none;
            margin: 0 0 24px;
            padding: 0;
        }
        .check-points li {
            display: flex;
            align-items: flex-start;
            gap: 11px;
            color: rgba(225, 238, 250, 0.8);
            font-size: 14px;
            line-height: 1.7;
            padding: 6px 0;
        }
        .check-points li::before {
            content: "";
            width: 8px;
            height: 8px;
            flex-shrink: 0;
            background: var(--brand-cyan);
            box-shadow: 0 0 10px rgba(54, 207, 201, 0.6);
            border-radius: 2px;
            transform: rotate(45deg);
            margin-top: 9px;
        }

        /* CMS 动态区域 */
        /* --------------------------------------------------------- */
        .news-section {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            transform: translateY(-5px);
            border-color: rgba(82, 167, 255, 0.4);
            background: rgba(255, 255, 255, 0.06);
            box-shadow: var(--shadow-lg);
        }
        .news-thumb {
            height: 184px;
            background: #0d1b2e;
            position: relative;
            overflow: hidden;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.04);
        }
        .news-cat {
            position: absolute;
            left: 14px;
            top: 14px;
            background: rgba(8, 18, 34, 0.68);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            font-size: 12px;
            padding: 5px 12px;
            color: #b9d9ff;
        }
        .news-content {
            padding: 22px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-content h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            color: #f2f6fb;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-content p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex-grow: 1;
            margin-bottom: 16px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-weak);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 0 0;
            margin-top: 2px;
        }
        .news-meta .news-time {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .news-read {
            color: var(--link);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-read .rlink {
            font-size: 13px;
            color: inherit;
        }

        /* 动态空状态 */
        .empty-state {
            border: 1px dashed rgba(255, 255, 255, 0.18);
            background: rgba(255, 255, 255, 0.035);
            border-radius: var(--radius);
            padding: 56px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 14px;
        }
        .empty-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* FAQ */
        /* --------------------------------------------------------- */
        .faq-wrap {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 36px;
        }
        .faq-left {
            grid-column: span 5;
        }
        .faq-right {
            grid-column: 7 / span 6;
        }
        .faq-left .faq-summary {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 24px;
        }
        .faq-link-list {
            display: flex;
            flex-direction: column;
        }
        .faq-link-list a {
            display: inline-flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            letter-spacing: 0.2px;
            color: var(--text-main);
            padding: 12px 14px;
            border-radius: 10px;
            transition: background 0.25s ease, color 0.25s ease;
            border-left: 1px solid transparent;
        }
        .faq-link-list a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
        }
        .faq-item-card {
            border: 1px solid var(--border);
            background: rgba(11, 22, 42, 0.5);
            backdrop-filter: blur(12px);
            border-radius: 14px;
            overflow: hidden;
            margin-bottom: 14px;
            transition: border-color 0.3s ease;
        }
        .faq-item-card.is-active {
            border-color: rgba(82, 167, 255, 0.35);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            padding: 19px 22px;
            font-size: 15.5px;
            font-weight: 600;
            color: rgba(240, 246, 252, 0.88);
            cursor: pointer;
            gap: 20px;
        }
        .faq-toggle {
            position: relative;
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }
        .faq-toggle::before,
        .faq-toggle::after {
            content: "";
            position: absolute;
            background: #52a7ff;
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .faq-toggle::before {
            width: 2px;
            height: 16px;
            left: 8px;
            top: 1px;
        }
        .faq-toggle::after {
            width: 16px;
            height: 2px;
            top: 8px;
            left: 1px;
        }
        .faq-item-card.is-active .faq-toggle::before {
            transform: rotate(90deg);
            xopacity: 0;
        }
        .faq-item-card.is-active .faq-toggle::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
        }
        .faq-item-card.is-active .faq-answer {
            opacity: 1;
            max-height: 220px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            line-height: 1.85;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding-top: 16px;
            margin-top: 0;
        }

        /* CTA */
        /* --------------------------------------------------------- */
        .cta-wrapper {
            padding: 18px 0 90px;
            background: var(--bg-deep);
        }
        .cta-banner {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            background: linear-gradient(135deg, #0b2337, #10233a);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 72px 30px;
            text-align: center;
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            top: -40%;
            left: 15%;
            width: 200px;
            height: 300px;
            background: linear-gradient(180deg, rgba(54, 207, 201, 0.18), transparent);
            filter: blur(60px);
            transform: rotate(20deg);
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            bottom: -60px;
            right: 10%;
            width: 260px;
            height: 220px;
            background: rgba(45, 140, 240, 0.2);
            filter: blur(80px);
        }
        .cta-banner h2 {
            position: relative;
            z-index: 2;
            font-size: clamp(26px, 2.6vw + 16px, 39px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-banner h2 .cta-accent {
            background: linear-gradient(135deg, #5eb2ff, #36cfc9);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .cta-banner p {
            position: relative;
            z-index: 2;
            max-width: 620px;
            margin: 0 auto 30px;
            color: rgba(202, 220, 238, 0.8);
            font-size: 15px;
            line-height: 1.8;
        }
        .cta-btn-group {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        /* 页脚 */
        /* --------------------------------------------------------- */
        .site-footer {
            background: #0b1420;
            border-top: 1px solid rgba(120, 170, 220, 0.12);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 44px;
            padding-bottom: 44px;
        }
        .footer-brand .logo-footer {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 300px;
        }
        .footer-title {
            font-size: 14px;
            letter-spacing: 1px;
            color: #dce7f2;
            margin-bottom: 18px;
            font-weight: 700;
        }
        .footer-links li {
            margin-bottom: 6px;
        }
        .footer-links a {
            font-size: 14px;
            line-height: 2.2;
            color: #7e93a9;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #6bc2ff;
        }
        .footer-contact {
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-contact li + li {
            margin-top: 12px;
        }
        .footer-contact .contact-label {
            display: block;
            color: #8598ac;
            font-size: 13px;
        }
        .footer-contact strong {
            color: #dfeaf4;
            font-weight: 600;
            margin-top: 2px;
            display: block;
        }
        .social-row {
            display: flex;
            gap: 12px;
            margin-top: 18px;
        }
        .social-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: all 0.25s ease;
        }
        .social-icon:hover {
            color: #fff;
            background: rgba(45, 140, 240, 0.3);
            box-shadow: 0 0 18px rgba(45, 140, 240, 0.25);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #4c6078;
        }
        .footer-bottom .copy-domain {
            color: #5f7490;
        }

        /* 移动端菜单 */
        .mobile-nav {
            display: none;
        }
        .mobile-nav-links {
            display: none;
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            width: 100%;
            z-index: 140;
            background: rgba(8, 17, 32, 0.98);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            overflow-y: auto;
            padding: 96px 34px 40px;
            flex-direction: column;
        }
        .mobile-nav-links.is-open {
            display: flex;
        }
        .mobile-nav-links a.mnav-link {
            font-size: 21px;
            font-weight: 600;
            color: #d6e3ef;
            line-height: 2.1;
            padding: 15px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            display: block;
        }
        .mobile-nav-links a.mnav-link.active {
            color: #6bc2ff;
        }
        .mobile-nav-footer {
            margin-top: 40px;
            color: var(--text-muted);
            font-size: 13px;
            line-height: 2;
        }

        /* 动画 */
        .reveal-init {
            opacity: 0;
            transform: translateY(16px);
        }
        .reveal-in {
            opacity: 1;
            transform: translateY(0);
            transition: opacity 0.65s ease, transform 0.65s ease;
        }

        /* 响应式 */
        @media screen and (max-width: 1024px) {
            .feature-cards {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .showcase-row {
                gap: 28px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .faq-wrap {
                gap: 20px;
            }
            .faq-left {
                grid-column: span 5;
            }
            .faq-right {
                grid-column: 7 / span 6;
            }
        }
        @media screen and (max-width: 768px) {
            :root {
                --spacer: 56px;
            }
            .header-main .main-nav {
                display: none;
            }
            .header-actions .htel {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .header-actions .btn {
                display: none;
            }
            .topbar-links {
                display: none;
            }
            .hero {
                padding: 92px 0 70px;
                min-height: 80vh;
            }
            .hero-chips {
                border-radius: 18px;
                flex-direction: column;
                align-items: flex-start;
                margin-left: 0;
                margin-right: 0;
                width: 100%;
                padding: 12px 18px;
            }
            .hero-actions {
                padding-left: 8px;
                padding-right: 8px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .showcase-media,
            .showcase-body {
                grid-column: span 12;
            }
            .showcase-row.row-reverse .showcase-media {
                grid-column: span 12;
                grid-row: auto;
            }
            .showcase-row.row-reverse .showcase-body {
                grid-column: span 12;
                grid-row: auto;
            }
            .faq-left {
                display: none;
            }
            .faq-right {
                grid-column: span 12;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .feature-cards {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 20px;
            }
            .footer-bottom {
                flex-direction: column;
            }
            .cta-banner {
                padding: 52px 16px;
            }
            .cta-banner h2 {
                font-size: 25px;
            }
        }
        @media screen and (max-width: 520px) {
            .section {
                padding: 46px 0;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .showcase-row {
                gap: 24px;
                margin-bottom: 48px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: clamp(30px, 7vw, 40px);
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-chips span {
                font-size: 12px;
            }
            .btn {
                height: 44px;
                width: auto;
                padding: 0 22px;
            }
            .feature-card {
                min-height: auto;
            }
        }

/* roulang page: article */
:root{
    --bg-deep:#081120;
    --bg:#0a1424;
    --bg-panel:#0d1b2e;
    --bg-soft:rgba(15,23,42,.72);
    --border:rgba(255,255,255,.08);
    --border-strong:rgba(255,255,255,.14);
    --text-main:#e6edf5;
    --text-sub:#8ea3b9;
    --text-weak:#5b7088;
    --text-faint:#40536a;
    --brand:#2d8cf0;
    --brand-cyan:#36cfc9;
    --gold:#ffc53d;
    --link:#52a7ff;
    --link-hover:#6bc2ff;
    --danger:#ff9d68;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-sm:8px;
    --shadow-1:0 8px 20px rgba(0,0,0,.22);
    --shadow-2:0 12px 28px rgba(0,0,0,.28);
    --ease:cubic-bezier(.2,.7,.3,1);
    --content-width:1220px;
    --read-width:1080px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
    margin:0;
    font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
    font-size:15px;
    line-height:1.7;
    color:var(--text-main);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    letter-spacing:.15px;
}

body.is-locked{overflow:hidden}

img,svg,video{max-width:100%;display:inline-block;vertical-align:middle}
a{color:var(--link);text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,opacity .2s ease,box-shadow .2s ease,transform .2s ease}
a:hover{color:var(--link-hover)}
button{font-family:inherit}
p,h1,h2,h3,h4,ul,ol,figure{margin:0;padding:0} 
ul[class],ol[class]{list-style:none}

.container{
    width:100%;
    max-width:var(--content-width);
    margin:0 auto;
    padding:0 24px;
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 30px;
    border-radius:10px;
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    line-height:1;
    cursor:pointer;
    transition:transform .2s var(--ease),box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
    text-decoration:none;
    white-space:nowrap;
    user-select:none;
}
.btn:active{transform:scale(.98)}
.btn:focus-visible{outline:2px solid var(--link);outline-offset:3px}

.btn-primary{
    background:linear-gradient(135deg,var(--brand) 0%,var(--brand-cyan) 100%);
    color:#fff;
    box-shadow:0 0 16px rgba(45,140,240,.28),0 8px 18px rgba(0,0,0,.14);
}
.btn-primary:hover{
    color:#fff;
    filter:brightness(1.08);
    box-shadow:0 0 24px rgba(45,140,240,.4),0 10px 22px rgba(0,0,0,.2);
    transform:translateY(-1px);
}

.btn-ghost{
    background:rgba(255,255,255,.04);
    border-color:var(--border-strong);
    color:rgba(255,255,255,.88);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.03);
}
.btn-ghost:hover{
    background:rgba(255,255,255,.08);
    border-color:rgba(90,167,255,.55);
    color:#fff;
}

.btn-sm{height:42px;padding:0 22px;font-size:14px;border-radius:9px}
.btn-lg{height:52px;padding:0 38px}

.text-link{
    display:inline-flex;
    align-items:center;
    gap:7px;
    color:var(--text-sub);
    font-size:14px;
    font-weight:500;
}
.text-link .arrow{
    transition:transform .22s var(--ease);
    display:inline-flex;
}
.text-link:hover{color:var(--link-hover)}
.text-link:hover .arrow{transform:translateX(4px)}

.section{position:relative;padding:92px 0}
.section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:30px;
    margin-bottom:38px;
    flex-wrap:wrap;
}
.eyebrow{
    display:inline-block;
    font-size:13px;
    letter-spacing:.5px;
    color:var(--brand-cyan);
    border:1px solid rgba(54,207,201,.24);
    background:rgba(54,207,201,.08);
    padding:4px 12px;
    border-radius:99px;
    margin-bottom:12px;
    font-weight:600;
}
.h2-title{
    font-size:clamp(26px,2.4vw + 18px,36px);
    line-height:1.25;
    font-weight:700;
    letter-spacing:-.5px;
    color:var(--text-main);
    position:relative;
}
.h2-title::before{
    content:'';
    display:block;
    width:54px;
    height:2px;
    border-radius:3px;
    background:linear-gradient(90deg,var(--brand),var(--brand-cyan));
    margin-bottom:18px;
}
.h3-title{font-size:19px;font-weight:600;line-height:1.45;color:var(--text-main)}

/* ===== top bar ===== */
.top-strip{
    background:rgba(4,10,20,.9);
    border-bottom:1px solid rgba(255,255,255,.05);
    padding:9px 0;
    font-size:13px;
    color:var(--text-sub);
    letter-spacing:.25px;
}
.top-strip .container{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:14px;
}
.top-strip .hotline{
    color:var(--text-sub);
    white-space:nowrap;
}
.top-strip .hotline i{
    font-style:normal;
    color:var(--link);
    font-weight:500;
}

/* ===== header ===== */
.site-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:rgba(9,17,30,.78);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--border);
    transition:background .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{
    background:rgba(7,13,23,.94);
    box-shadow:0 10px 32px rgba(0,0,0,.28);
}
.site-header .container{
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:76px;
    gap:22px;
}

.brand{
    display:flex;
    align-items:center;
    gap:11px;
    flex-shrink:0;
}
.logo-mark{
    width:38px;
    height:38px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:10px;
    font-weight:800;
    font-size:15px;
    line-height:1;
    background:linear-gradient(135deg,var(--brand),var(--brand-cyan));
    color:#fff;
    box-shadow:0 4px 14px rgba(45,140,240,.35);
    flex:none;
}
.logo-text{
    display:flex;
    flex-direction:column;
    line-height:1.1;
}
.lg-line1{
    font-size:18px;
    font-weight:800;
    letter-spacing:-.3px;
    color:#fff;
}
.lg-line2{
    font-size:13px;
    font-weight:600;
    color:rgba(255,255,255,.7);
    letter-spacing:2.5px;
    margin-top:3px;
}

.main-nav{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
}
.main-nav .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    height:76px;
    padding:0 18px;
    font-size:15px;
    font-weight:500;
    color:rgba(230,237,245,.85);
    text-decoration:none;
    transition:color .25s ease;
}   
.main-nav .nav-link::after{
    content:'';
    position:absolute;
    left:15px;
    right:15px;
    bottom:12px;
    height:2px;
    background:linear-gradient(90deg,var(--brand),var(--brand-cyan));
    border-radius:2px;
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .25s var(--ease);
}
.main-nav .nav-link:hover{color:#fff}
.main-nav .nav-link:hover::after{transform:scaleX(1)}
.main-nav .nav-link.active,
.main-nav .nav-link[aria-current="page"]{
    color:#fff;
}
.main-nav .nav-link.active::after,
.main-nav .nav-link[aria-current="page"]::after{transform:scaleX(1)}

.header-actions{
    display:flex;
    align-items:center;
    gap:10px;
    margin-left:6px;
}
.menu-toggle{
    display:none;
    width:42px;
    height:42px;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    gap:5px;
    background:rgba(255,255,255,.05);
    border:1px solid var(--border);
    border-radius:10px;
    cursor:pointer;
    padding:0;
}
.menu-toggle span{
    width:18px;
    height:2px;
    border-radius:3px;
    background:rgba(255,255,255,.9);
    display:block;
    transition:transform .2s var(--ease),opacity .2s ease;
}
.menu-toggle:hover span:first-child{transform:translateY(-1px)}
.menu-toggle:hover span:last-child{transform:translateY(1px)}

/* ===== mobile drawer ===== */
.mobile-drawer{
    display:flex;
    flex-direction:column;
    position:fixed;
    inset:0;
    z-index:10000;
    background:rgba(5,11,20,.96);
    backdrop-filter:blur(22px);
    opacity:0;
    visibility:hidden;
    transform:translateX(100%);
    transition:transform .4s var(--ease),opacity .3s ease,visibility .3s ease;
    padding:30px 28px 36px;
    overflow-y:auto;
}
.mobile-drawer.is-open{
    transform:translateX(0);
    opacity:1;
    visibility:visible;
}
.drawer-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:16px;
    margin-bottom:48px;
}
.drawer-close{
    flex:none;
    width:40px;
    height:40px;
    border-radius:50%;
    border:1px solid var(--border-strong);
    background:rgba(255,255,255,.04);
    color:rgba(255,255,255,.85);
    font-size:25px;
    line-height:1;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    transition:background .2s ease,transform .25s ease;
}
.drawer-close:hover{background:rgba(255,255,255,.12);transform:rotate(90deg)}
.drawer-nav{
    display:flex;
    flex-direction:column;
    margin-bottom:44px;
}
.drawer-nav .nav-link{
    display:block;
    padding:15px 0;
    font-size:18px;
    font-weight:600;
    color:rgba(255,255,255,.92);
    border-bottom:1px solid rgba(255,255,255,.08);
}
.drawer-nav .nav-link:hover,
.drawer-nav .nav-link.active{color:var(--brand-cyan)}
.drawer-foot{
    border-top:1px solid rgba(255,255,255,.12);
    padding-top:26px;
    display:grid;
    gap:10px;
    font-size:14px;
    color:var(--text-sub);
}
.drawer-foot strong{display:block;color:var(--text-main);font-weight:600;font-size:15px;line-height:1.4}
.drawer-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}

/* ===== Page Hero Interior ===== */
.page-hero{
    padding:74px 0 42px;
    position:relative;
    background:
        radial-gradient(ellipse at 12% 10%, rgba(45,140,240,.13), transparent 44%),
        radial-gradient(ellipse at 88% 24%, rgba(54,207,201,.09), transparent 36%),
        linear-gradient(180deg, rgba(9,17,30,.94), rgba(10,20,36,.96)),
        url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    border-bottom:1px solid var(--border);
}
.page-hero::before{
    content:'';
    position:absolute;
    left:0;right:0;bottom:0;height:120px;
    background:linear-gradient(0deg,var(--bg),transparent);
    pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb-nav{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:6px;
    margin-bottom:18px;
    font-size:13px;
    color:var(--text-weak);
    letter-spacing:.2px;
}
.breadcrumb-nav a{
    color:var(--text-sub);
    transition:color .2s;
}
.breadcrumb-nav a:hover{color:var(--link-hover)}
.breadcrumb-nav .sep{opacity:.5;display:inline-block}
.hero-title-wrap{
    max-width:1000px;
}
.hero-title-wrap h1{
    font-size:clamp(31px,4vw + 20px,48px);
    line-height:1.22;
    font-weight:800;
    letter-spacing:-.4px;
    color:#fff;
    margin-bottom:20px;
}

/* ===== Article Layout ===== */
.article-main{padding:54px 0 18px}
.read-container{
    max-width:var(--read-width);
    margin:0 auto;
    padding:0 24px;
}
.article-mega{
    border-radius:var(--radius-lg);
    background:linear-gradient(165deg, rgba(17,27,43,.56), rgba(12,24,40,.78));
    border:1px solid var(--border);
    box-shadow:var(--shadow-1);
    padding:clamp(26px,4vw,56px);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
}
.article-tag-strip{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:22px;
}
.article-tag-strip .eyebrow{margin-bottom:0}
.article-date-chip{
    font-size:13px;
    color:var(--text-sub);
    background:rgba(255,255,255,.05);
    border:1px solid var(--border);
    border-radius:99px;
    padding:4px 12px;
}

.article-heading h1{
    font-size:clamp(30px,4vw + 20px,46px);
    line-height:1.25;
    font-weight:800;
    color:#fff;
    letter-spacing:-.5px;
    margin-bottom:18px;
}
.article-sub-desc{
    font-size:16px;
    line-height:1.85;
    color:var(--text-sub);
    max-width:760px;
    margin-bottom:26px;
}
.article-meta-line{
    display:flex;
    flex-wrap:wrap;
    gap:13px 26px;
    align-items:center;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.08);
    font-size:13.5px;
    color:var(--text-sub);
}
.article-meta-line .meta-item{
    display:inline-flex;
    align-items:center;
    gap:7px;
}
.meta-icon{
    width:16px;height:16px;
    opacity:.75;
    color:var(--text-weak);
}
.article-meta-line strong{color:rgba(255,255,255,.82);font-weight:500}
.article-divider{height:1px;background:linear-gradient(90deg,rgba(45,140,240,.4),rgba(255,255,255,.05),transparent);border:none;margin:34px 0}

.article-body{
    color:#d0dbe7;
    font-size:16.5px;
    line-height:1.95;
}
.article-body p{
    margin:0 0 24px;
}
.article-body h2{
    margin:52px 0 20px;
    font-size:clamp(22px,2vw + 14px,30px);
    line-height:1.3;
    color:#fff;
    padding-left:16px;
    position:relative;
    font-weight:700;
}
.article-body h2::before{
    content:'';
    position:absolute;
    left:0;
    top:4px;
    bottom:4px;
    width:3px;
    border-radius:2px;
    background:linear-gradient(180deg,var(--brand),var(--brand-cyan));
}
.article-body h3{
    margin:34px 0 16px;
    color:#f1f6fc;
    font-size:21px;
    font-weight:600;
    line-height:1.45;
}
.article-body a{
    color:var(--link);
    text-decoration:underline;
    text-underline-offset:3px;
    text-decoration-color:rgba(82,167,255,.4);
    transition:all .2s;
}
.article-body a:hover{
    color:var(--link-hover);
    text-decoration-color:var(--link-hover);
}
.article-body ul,
.article-body ol{
    padding-left:18px;
    margin-bottom:28px;
    display:grid;
    gap:10px;
}
.article-body li::marker{color:var(--brand-cyan)}
.article-body blockquote{
    margin:32px 0;
    padding:22px 26px;
    background:rgba(255,255,255,.045);
    border-left:3px solid var(--brand);border-radius:0 14px 14px 0;
    color:rgba(255,255,255,.78);
    font-size:17px;
    transform:translateZ(0);
    backdrop-filter:blur(4px);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
    border-radius:12px;
    width:100%;
    height:auto;
    box-shadow:0 10px 30px rgba(0,0,0,.28);
    background:rgba(255,255,255,.09);
    animation:skeleton-pulse 1.5s infinite ease-in-out;
}
.article-body img + figcaption{
    text-align:center;
    font-size:13px;
    color:#7a8ca3;
    margin-top:8px;
}
.article-body table{
    width:100%;
    margin:26px 0;
    font-size:15px;
    border-collapse:collapse;
    color:var(--text-sub);
    background:rgba(255,255,255,.03);
    border-radius:12px;
    overflow:hidden;
    border:1px solid var(--border);
}
.article-body table th{
    background:rgba(45,140,240,.12);
    color:#fff;
    font-weight:600;
    text-align:left;
}
.article-body table th,.article-body table td{
    padding:14px 16px;
    border-bottom:1px solid rgba(255,255,255,.08);
}
.article-body pre{
    padding:22px;
    background:#09131f;
    border:1px solid var(--border);
    border-radius:12px;
    overflow-x:auto;
    color:#bad6f3;
    margin-bottom:28px;
    font-size:14px;
    line-height:1.7;
}
.article-body code{
    font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
    background:rgba(255,255,255,.1);
    border-radius:4px;
    padding:2px 6px;
    color:#ffd688;
}

.article-foot{
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:18px;
    margin-top:50px;
    padding-top:30px;
    border-top:1px solid rgba(255,255,255,.08);
}
.tag-box{
    display:flex;
    flex-wrap:wrap;
    gap:9px;
    align-items:center;
}
.tag-chip{
    font-size:13px;
    color:rgba(230,237,245,.82);
    background:rgba(45,140,240,.08);
    border:1px solid rgba(82,167,255,.24);
    border-radius:99px;
    padding:5px 14px;
    transition:all .2s;
}
.tag-chip:hover{
    background:rgba(45,140,240,.16);
    border-color:rgba(82,167,255,.55);
}
.article-share-actions{
    display:inline-flex;
    gap:10px;
}
.copy-url-btn{
    border:1px solid var(--border-strong);
    background:rgba(255,255,255,.04);
    padding:0 16px;
    height:38px;
    display:inline-flex;
    align-items:center;
    gap:8px;
    border-radius:9px;
    color:rgba(255,255,255,.76);
    font-size:13.5px;
    cursor:pointer;
    transition:all .22s;
}
.copy-url-btn:hover{
    color:#fff;
    background:rgba(82,167,255,.15);
    border-color:rgba(82,167,255,.6);
}
.copy-url-btn svg{width:15px;height:15px}
.copy-url-btn .ok{display:none;color:var(--brand-cyan)}
.copy-url-btn.copied .ok{display:inline}
.copy-url-btn.copied .copy{display:none}

/* empty state */
.empty-state{
    max-width:900px;
    margin:50px auto 110px;
    padding:80px 30px;
    border-radius:20px;
    text-align:center;
    background:rgba(255,255,255,.035);
    border:1px dashed rgba(255,255,255,.16);
}
.empty-state-icon{
    width:72px;
    height:72px;
    border-radius:50%;
    border:1px solid rgba(255,255,255,.2);
    display:flex;
    align-items:center;
    justify-content:center;
    color:rgba(255,255,255,.45);
    margin:0 auto 22px;
}
.empty-state h1{
    font-size:clamp(25px,3vw + 10px,34px);
    color:#fff;
    font-weight:700;
    margin-bottom:14px;
}
.empty-state p{
    color:var(--text-sub);
    max-width:520px;
    margin:0 auto 28px;
    line-height:1.8;
}

/* related card section */
.related-section{padding:66px 0 108px}
.related-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
    margin-top:16px;
}
.related-card{
    display:block;
    border-radius:16px;
    overflow:hidden;
    background:rgba(255,255,255,.035);
    border:1px solid var(--border);
    transition:transform .3s var(--ease),box-shadow .3s ease,border-color .3s ease,background .3s ease;
}
.related-card:hover{
    transform:translateY(-6px);
    box-shadow:0 16px 32px rgba(0,0,0,.3);
    border-color:rgba(82,167,255,.35);
    background:rgba(255,255,255,.06);
}
.related-card img{
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
    background:rgba(255,255,255,.08);
    display:block;
}
.related-card .card-meta{
    padding:20px 20px 10px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    font-size:12px;
    color:var(--text-weak);
    letter-spacing:.2px;
}
.related-card .card-title{
    padding:0 20px;
    color:rgba(255,255,255,.92);
    font-size:16.5px;
    font-weight:600;
    line-height:1.5;
}
.related-card .card-bottom{
    padding:16px 20px 20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    color:var(--text-sub);
}
.arrow-icon{
    width:17px;
    height:17px;
    font-style:normal;
    font-size:16px;
    transition:transform .2s var(--ease);
    color:var(--link);
}
.related-card:hover .arrow-icon{transform:translateX(5px)}
.related-card .rel-label{
    font-size:13px;
    color:var(--text-weak);
    background:rgba(255,255,255,.06);
    border:1px solid var(--border);
    padding:4px 11px;
    border-radius:99px;
}

/* bottom CTA */
.cta-panel{
    border-radius:22px;
    padding:48px 40px;
    position:relative;
    background:
        radial-gradient(circle at 90% 0%,rgba(54,207,201,.2),transparent 34%),
        radial-gradient(circle at 8% 20%,rgba(45,140,240,.24),transparent 38%),
        linear-gradient(140deg,#0c2538,#101f38 56%,#0d1b2e);
    border:1px solid rgba(82,167,255,.18);
    overflow:hidden;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    flex-wrap:wrap;
    box-shadow:0 16px 40px rgba(0,0,0,.25);
}
.cta-panel::before{
    content:"";
    position:absolute;
    right:-40px;bottom:-50px;
    width:220px;height:220px;
    background:radial-gradient(circle,rgba(54,207,201,.075),transparent 65%);
    pointer-events:none;
}
.cta-panel h2{
    font-size:clamp(23px,2.4vw + 13px,32px);
    font-weight:700;
    color:#fff;
    line-height:1.35;letter-spacing:.1px;
}
.cta-panel p{
    margin-top:12px;
    color:rgba(230,237,245,.65);
    font-size:15px;
    line-height:1.8;
    max-width:570px;
}
.cta-panel .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}

.footer-site-cta{
    padding:0 0 88px;
}

/* ===== Footer ===== */
.site-footer{
    position:relative;
    background:#08121f;
    border-top:1px solid rgba(120,170,220,.12);
    padding:78px 0 26px;
    overflow:hidden;
}
.site-footer::before{
    content:'';
    position:absolute;
    inset:0;
    pointer-events:none;
    background:radial-gradient(ellipse at 20% 0%,rgba(45,140,240,.06),transparent 46%);
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1.3fr;
    gap:46px 28px;
    border-bottom:1px solid rgba(255,255,255,.07);
    padding-bottom:42px;
}
.logo-footer{
    display:flex;
    align-items:center;
    gap:11px;
    margin-bottom:18px;
}
.logo-footer .logo-mark{
    width:34px;
    height:34px;
    font-size:14px;
}
.logo-footer .lg-line1{font-size:17px}
.logo-footer .lg-line2{
    font-size:11px;
    letter-spacing:2.4px;
    color:rgba(255,255,255,.6);
}
.footer-brand p{
    font-size:14.5px;
    line-height:1.9;
    color:var(--text-weak);
    max-width:360px;
    margin-top:4px;
}
.footer-title{
    font-size:15px;
    font-weight:600;
    color:rgba(255,255,255,.95);
    margin-bottom:18px;
    letter-spacing:.2px;
}
.footer-links{
    display:grid;
    gap:4px;
}
.footer-links a{
    color:var(--text-sub);
    font-size:14px;
    font-weight:400;
    padding:6px 0;
    transition:color .2s;
}
.footer-links a:hover{
    color:#82cbff;
    padding-left:3px;
}
.footer-contact{
    display:grid;
    gap:13px;
    list-style:none;
}
.footer-contact li{
    display:flex;
    gap:12px;
    font-size:13.5px;
    color:var(--text-sub);
    line-height:1.7;
}
.contact-label{
    display:block;
    margin-top:2px;
    font-size:12px;
    color:var(--text-weak);
    min-width:76px;
}
.footer-contact strong{
    color:rgba(255,255,255,.88);
    font-weight:500;
    display:block;
    word-break:break-all;
}
.social-row{
    display:flex;
    align-items:center;
    gap:10px;
    margin-top:14px;
}
.social-icon{
    width:36px;
    height:36px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:10px;
    border:1px solid rgba(255,255,255,.13);
    background:rgba(255,255,255,.04);
    color:#8ea3b9;
    transition:all .22s;
}
.social-icon svg{width:16px;height:16px}
.social-icon:hover{
    color:#fff;
    border-color:rgba(82,167,255,.55);
    background:rgba(45,140,240,.14);
    box-shadow:0 0 12px rgba(45,140,240,.3);
}
.footer-bottom{
    padding-top:22px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-weak);
}
.footer-bottom a{color:#64809c;transition:color .2s}
.footer-bottom a:hover{color:#82cbff}
.icp-line{display:inline-flex;gap:22px;flex-wrap:wrap}
.back-to-top{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:13px;
    color:var(--text-weak);
    transition:all .2s;
}
.back-to-top:hover{color:var(--link-hover);transform:translateY(-2px)}

/* misc animation */
.image-skeleton,
.backpic-skeleton{background:rgba(255,255,255,.06);animation:skeleton-pulse 1.5s infinite ease-in-out}
@keyframes skeleton-pulse{
    0%,100%{opacity:.95}
    50%{opacity:.65}
}
body.js-ready .reveal{
    opacity:0;
    transform:translateY(10px);
    transition:opacity .68s ease,transform .5s cubic-bezier(.19,.7,.25,1);
}
body.js-ready .reveal.on{
    opacity:1;
    transform:none;
}

@media (prefers-reduced-motion: reduce){
    *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto}
}

/* ===== Responsive ===== */
@media screen and (max-width:1024px){
    .main-nav{display:none}
    .header-actions .btn{display:none}
    .menu-toggle{display:flex}
    .section{padding:64px 0}
    .footer-grid{
        grid-template-columns:1.4fr 1fr 1fr;
        gap:34px 22px;
    }
    .footer-brand{grid-column:1/-1}
    .related-grid{grid-template-columns:1fr 1fr}
}

@media screen and (max-width:640px){
    .container{padding:0 18px}
    .top-strip .container{justify-content:center;font-size:12px}
    .top-strip .hotline{display:none}
    .site-header .container{height:64px}
    .brand .logo-mark{width:34px;height:34px;font-size:13px;border-radius:9px}
    .lg-line1{font-size:16px}
    .lg-line2{font-size:11px;letter-spacing:1.8px}
    .section{padding:56px 0}
    .section-head{align-items:flex-start;margin-bottom:26px}
    .h2-title{font-size:28px}
    .page-hero{padding:50px 0 30px}
    .breadcrumb-nav{margin-bottom:14px}
    .article-main{padding:30px 0 8px}
    .read-container{padding:0 16px}
    .article-mega{padding:26px 20px}
    .article-body{
        font-size:16px;
        line-height:1.86;
    }
    .article-body blockquote{
        padding:16px 18px;
        font-size:16px;
        margin:24px 0;
    }
    .article-body table{display:block;overflow-x:auto}
    .article-body table th,.article-body table td{white-space:nowrap}
    .article-foot{flex-direction:column;align-items:flex-start}
    .related-grid{grid-template-columns:1fr}
    .cta-panel{padding:36px 24px}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;text-align:center;justify-content:center}
    .empty-state{padding:50px 20px;margin:30px auto 60px;}
    .mobile-drawer{padding-left:20px;padding-right:20px}
}

@media screen and (min-width:641px){
    .mobile-drawer{display:none !important}
}

/* roulang page: category1 */
:root{
  --bg:#0a1424;
  --bg-deep:#0d1b2e;
  --panel:rgba(255,255,255,0.045);
  --panel-2:rgba(15,25,40,0.72);
  --line:rgba(255,255,255,0.1);
  --line-glass:rgba(255,255,255,0.14);
  --primary:#2d8cf0;
  --cyan:#36cfc9;
  --ice:#5baaff;
  --ice-light:#6bc2ff;
  --text:#e6edf5;
  --sub:#8ea3b9;
  --weak:#5b7088;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(0,0,0,0.2);
  --shadow-hover:0 16px 36px rgba(0,0,0,0.26);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:100px;}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ice);text-decoration:none;transition:color .25s ease;background-color:transparent;}
a:hover{color:var(--ice-light);}
ul,ol,dl{list-style:none;}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit;}

.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;}
.grid-container.full{max-width:100%;padding-left:0;padding-right:0;}
body.menu-open{overflow:hidden;}

.section{padding:88px 0;}
.section-sm{padding:34px 0;}
.section-md{padding:58px 0;}
.section-head{margin-bottom:42px;}
.section-kicker{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--cyan);
  border:1px solid rgba(54,207,201,.32);background:rgba(54,207,201,.08);
  padding:5px 14px;border-radius:999px;margin-bottom:14px;
}
h1,h2,h3,h4{font-weight:700;color:#fff;line-height:1.3;}
h1{font-size:clamp(36px,5vw + 18px,56px);letter-spacing:-.02em;}
h2{font-size:clamp(24px,2.4vw + 14px,34px);}
h3{font-size:18px;font-weight:600;}
p{color:var(--text);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 30px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;gap:8px;transition:all .25s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn-sm{height:42px;padding:0 22px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,#2d8cf0,#36cfc9);
  color:#fff;box-shadow:0 0 18px rgba(45,140,240,0.25);border-color:rgba(255,255,255,0.08);
}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 0 28px rgba(45,140,240,.38);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:scale(.98);}
.btn-line{
  background:transparent;border:1px solid rgba(255,255,255,.28);color:#eef4fb;
}
.btn-line:hover{border-color:var(--ice-light);background:rgba(255,255,255,.08);color:#fff;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid rgba(107,194,255,.7);outline-offset:3px;}
.btn .arrow{transition:transform .25s ease;}
.btn:hover .arrow{transform:translateX(4px);}

.img-frame{border:1px solid rgba(255,255,255,.12);border-radius:14px;overflow:hidden;margin-top:28px;position:relative;background:rgba(255,255,255,.06);}
.img-frame img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;}
.img-caption{display:block;text-align:center;font-size:13px;color:var(--sub);padding:12px 16px 10px;background:rgba(0,0,0,.06);}

/* ---------- Header / Navigation ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(9,17,31,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(120,170,220,.12);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{background:rgba(6,13,25,.96);box-shadow:0 8px 24px rgba(0,0,0,.22);}
.header-top{
  height:36px;background:rgba(4,10,18,.72);
  border-bottom:1px solid rgba(255,255,255,.05);
}
.header-top-inner{display:flex;align-items:center;justify-content:space-between;height:36px;font-size:12px;color:#7890a6;}
.header-top-inner strong{color:#b7cbe0;font-weight:500;}
.header-main{display:flex;align-items:center;justify-content:space-between;height:72px;gap:18px;}
.header-logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.logo-symbol{
  width:40px;height:40px;border-radius:12px;
  background:rgba(45,140,240,.18);
  border:1px solid rgba(107,194,255,.28);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--ice-light);
}
.logo-text-line{display:flex;flex-direction:column;line-height:1.15;}
.logo-line-1{font-size:18px;font-weight:700;color:#fff;letter-spacing:.02em;text-transform:lowercase;}
.logo-line-2{font-size:13px;color:#a9c3dc;letter-spacing:.06em;}
.logo-line-2 b{color:var(--ice-light);font-weight:600;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:9px;
  color:#d5dee8;font-size:15px;font-weight:500;transition:all .2s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--ice-light);background:rgba(45,140,240,.12);}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:-4px;height:2px;
  border-radius:2px;background:linear-gradient(90deg,#2d8cf0,#36cfc9);
}
.header-right{display:flex;align-items:center;gap:12px;}
.btn-header{height:40px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:none;width:46px;height:46px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:rgba(45,140,240,.08);border:1px solid rgba(255,255,255,.14);border-radius:12px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:3px;background:#e6edf5;}

.mobile-menu{
  position:fixed;inset:0;z-index:100;padding:28px 24px;
  background:linear-gradient(160deg,rgba(12,23,41,.99),rgba(7,13,24,.99));
  backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  transform:translateX(100%);
  visibility:hidden;
  transition:transform .32s ease,visibility .32s ease;
  display:flex;flex-direction:column;
}
.mobile-menu.mm-open{transform:translateX(0);visibility:visible;}
.mm-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:42px;}
.mm-brand{display:flex;align-items:center;gap:10px;}
.mm-brand .logo-symbol{background:rgba(54,207,201,.14);border-color:rgba(54,207,201,.3);color:var(--cyan);}
.mm-close{
  width:42px;height:42px;border:1px solid rgba(255,255,255,.14);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:#c9d7e4;
}
.mm-close:hover{color:#fff;border-color:var(--ice-light);}
.mm-nav{display:flex;flex-direction:column;gap:10px;margin-bottom:32px;}
.mm-nav a{
  display:block;padding:12px 16px;font-size:20px;font-weight:600;color:#d9e5f0;
  border-radius:12px;border-bottom:1px solid rgba(255,255,255,.08);
}
.mm-nav a.active{background:rgba(45,140,240,.14);color:var(--ice-light);}
.mm-cta-row{display:flex;flex-direction:column;gap:14px;margin-top:auto;}
.mm-contact{font-size:14px;color:var(--weak);border-top:1px solid rgba(255,255,255,.1);padding-top:18px;}
.mm-contact strong{color:#b9cddf;font-weight:500;display:block;}

/* ---------- Category Hero ---------- */
.cat-hero{
  position:relative;padding:84px 0 60px;overflow:hidden;
  background-color:#0a1424;
  border-bottom:1px solid rgba(120,170,220,.08);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.48;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,14,26,.98) 0%,rgba(7,14,26,.72) 48%,rgba(10,20,36,.4) 100%);
}
.cat-hero-inner{position:relative;z-index:2;max-width:880px;}
.eyebrow{
  display:inline-block;padding:6px 16px;border-radius:999px;
  font-size:13px;letter-spacing:.12em;color:#e2f1ff;
  background:rgba(45,140,240,.12);border:1px solid rgba(107,194,255,.26);
}
.cat-hero h1{margin-top:20px;margin-bottom:18px;color:#fff;}
.cat-hero-desc{font-size:17px;color:#b8c9d9;max-width:660px;letter-spacing:.25px;}
.cat-hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:30px;}
.hero-mini-stats{
  display:flex;align-items:center;flex-wrap:wrap;gap:16px;margin-top:34px;
}
.hero-mini-stats li{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;color:#9fb3c7;
}
.hero-mini-stats li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(54,207,201,.8);}
.hero-mini-stats li + li::before{background:#2d8cf0;}

/* ---------- Intro band ---------- */
.intro-band{margin-top:-44px;position:relative;z-index:4;padding-bottom:34px;}
.intro-card{
  background:rgba(15,23,42,.62);border:1px solid rgba(255,255,255,.14);
  border-radius:20px;padding:34px 38px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.intro-card p{color:#c6d3df;}
.intro-card-points{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:18px;}
.intro-card-points li{position:relative;padding-left:20px;font-size:14px;color:#b1c4d4;}
.intro-card-points li::before{
  content:"";position:absolute;left:3px;top:9px;width:7px;height:7px;
  transform:rotate(45deg);background:var(--cyan);border-radius:2px;
}

/* ---------- Doc layout ---------- */
.doc-area{padding:90px 0 56px;background:linear-gradient(180deg,#0b1729,#0a1424);}
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:13px;color:var(--weak);margin-bottom:14px;}
.breadcrumb a{color:#7fafd6;}
.breadcrumb a:hover{color:var(--ice-light);}
.doc-sidebar{position:sticky;top:102px;align-self:flex-start;;}
.side-card{
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:18px;
  padding:22px;margin-bottom:18px;
}
.side-title{font-size:14px;letter-spacing:.08em;color:#9bb6c9;text-transform:uppercase;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.09);margin-bottom:12px;}
.guide-menu li{margin:2px 0;}
.guide-menu a{
  display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:10px;
  color:#b9ccdb;font-size:15px;line-height:1.4;transition:all .2s;
}
.guide-menu a .num{font-size:12px;color:#6687a3;letter-spacing:.06em;min-width:26px;}
.guide-menu a:hover{background:rgba(45,140,240,.12);color:#fff;transform:translateX(2px);}
.support-mini{
  padding:20px;border-radius:16px;background:rgba(45,140,240,.1);
  border:1px solid rgba(45,140,240,.24);color:#b5cee3;font-size:14px;
}
.support-mini strong{display:block;color:#fff;margin-bottom:6px;}
.support-mini a{color:var(--ice-light);}
.guide-block{
  position:relative;background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.1);border-radius:20px;
  padding:36px 34px;margin-bottom:28px;overflow:hidden;
}
.guide-block::before{
  content:attr(data-index);
  position:absolute;right:-14px;top:-32px;font-size:116px;font-weight:800;
  color:rgba(255,255,255,.035);line-height:1;pointer-events:none;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.guide-block .guide-para{color:#c3d2e1;margin-bottom:16px;}
.guide-block h2{
  font-size:clamp(21px,1vw + 18px,26px);
  padding-left:16px;border-left:3px solid var(--cyan);margin-bottom:16px;
}
.block-kicker{font-size:13px;color:var(--cyan);letter-spacing:.08em;display:block;margin-bottom:8px;}
.tick-list{margin:18px 0 8px;display:grid;gap:12px;}
.tick-list li{position:relative;padding-left:28px;color:#c7d6e2;font-size:15px;}
.tick-list li::before{
  content:"";position:absolute;left:3px;top:7px;width:8px;height:8px;
  background:linear-gradient(135deg,#2d8cf0,#36cfc9);
  box-shadow:0 0 10px rgba(54,207,201,.5);border-radius:2px;transform:rotate(45deg);
}
.mini-tiles{margin-top:22px;}
.mini-tile{
  height:100%;background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:22px 20px;
  transition:all .25s ease;
}
.mini-tile:hover{border-color:rgba(107,194,255,.42);background:rgba(45,140,240,.1);transform:translateY(-3px);}
.mini-tile .tile-icon{
  width:38px;height:38px;border-radius:10px;background:rgba(54,207,201,.12);
  border:1px solid rgba(54,207,201,.28);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px;
}
.mini-tile h3{font-size:16px;margin-bottom:8px;}
.mini-tile p{font-size:14px;color:var(--sub);}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px;}
.step-item{
  position:relative;background:rgba(0,0,0,.2);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:24px 20px 20px;
}
.step-item::before{content:attr(data-step);font-size:13px;font-weight:700;color:var(--ice-light);letter-spacing:.1em;}
.step-item h3{font-size:17px;margin:12px 0 8px;}
.step-item p{font-size:13px;color:#9fb3c5;}

/* ---------- Thin CTA ---------- */
.narrow-cta{padding:50px 0;}
.narrow-cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:rgba(15,23,42,.66);border:1px solid rgba(255,255,255,.14);
  border-radius:18px;padding:28px 32px;backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);position:relative;overflow:hidden;
}
.narrow-cta-inner::after{
  content:"";position:absolute;right:0;top:0;height:100%;width:180px;
  background:linear-gradient(120deg,transparent,rgba(54,207,201,.08),rgba(45,140,240,.12));
  pointer-events:none;
}
.narrow-cta-copy h2{font-size:20px;color:#fff;margin-bottom:6px;}
.narrow-cta-copy p{font-size:14px;color:#b1c4d3;}

/* ---------- FAQ ---------- */
.faq-section{padding:80px 0 56px;background:#0b1729;border-top:1px solid rgba(255,255,255,.05);}
.faq-wrap{max-width:880px;margin:36px auto 0;}
.faq-head{margin-bottom:38px;text-align:center;}
.faq-item{
  background:rgba(15,23,42,.58);border:1px solid rgba(255,255,255,.12);
  border-radius:16px;margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:18px;
  padding:21px 24px;color:#e6edf2;font-size:16px;font-weight:600;text-align:left;
  background:transparent;transition:color .2s;
}
.faq-q:hover{color:var(--ice-light);}
.faq-icon{
  flex:0 0 28px;height:28px;border:1px solid rgba(255,255,255,.2);border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:19px;color:var(--cyan);
  transition:transform .28s ease,background .28s,border-color .28s;font-weight:300;line-height:1;
}
.open .faq-icon{transform:rotate(45deg);background:rgba(54,207,201,.18);border-color:var(--cyan);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1);}
.faq-a p{padding:2px 24px 22px;font-size:15px;color:#a7bbcb;line-height:1.8;}

/* ---------- Final CTA ---------- */
.cta-final{padding:80px 0 90px;}
.cta-final-inner{
  position:relative;border-radius:22px;padding:52px 50px;
  background:
    linear-gradient(135deg,rgba(10,21,37,.92),rgba(13,29,46,.72)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border:1px solid rgba(107,194,255,.18);overflow:hidden;box-shadow:var(--shadow-hover);
}
.cta-final-inner::before{
  content:"";position:absolute;left:0;top:0;width:240px;height:240px;
  background:radial-gradient(circle,rgba(54,207,201,.2),transparent 70%);
  pointer-events:none;
}
.cta-final h2{color:#fff;margin-bottom:14px;}
.cta-final p{color:#b5c9d8;max-width:560px;margin-bottom:22px;}
.cta-final .btn{align-self:flex-start;}

/* ---------- Footer ---------- */
.site-footer{background:#081120;border-top:1px solid rgba(120,170,220,.12);padding-top:60px;}
.footer-main .footer-brand .logo-footer{margin-bottom:18px;}
.footer-title{font-size:14px;font-weight:600;color:#b7ccdd;letter-spacing:.06em;margin-bottom:18px;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:#7389a0;font-size:14px;transition:color .2s;}
.footer-links a:hover{color:var(--ice);padding-left:4px;}
.footer-contact li{display:flex;align-items:flex-start;gap:9px;margin-bottom:12px;font-size:14px;color:#93a9bd;}
.footer-contact .diamond{color:var(--cyan);font-size:10px;margin-top:6px;}
.footer-contact strong{display:block;color:#bfd5e7;font-weight:500;font-size:14px;}
.footer-social{display:flex;gap:12px;margin-top:16px;}
.social-fake{
  width:36px;height:36px;border:1px solid rgba(255,255,255,.16);border-radius:10px;
  display:flex;align-items:center;justify-content:center;color:#a5b9ca;
  transition:all .25s;
}
.social-fake svg{width:17px;height:17px;fill:currentColor;}
.social-fake:hover{color:var(--ice-light);border-color:rgba(54,207,201,.6);box-shadow:0 0 14px rgba(54,207,201,.24);}
.site-footer-p{
  font-size:15px;color:#8096ae;line-height:1.9;max-width:400px;
}
.footer-bottom{
  margin-top:42px;border-top:1px solid rgba(255,255,255,.07);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#50657d;
}
.footer-bottom a{color:#72899f;}
.footer-bottom a:hover{color:var(--ice);}

/* ---------- Reveal ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease;}
.js .reveal.visible{opacity:1;transform:translateY(0);}

/* ---------- Responsive ---------- */
@media screen and (max-width:1023px){
  .main-nav,#desktopCta{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:64px 0;}
  .cat-hero{padding-top:62px;padding-bottom:46px;}
  .doc-sidebar{position:static;margin-bottom:26px;}
  .doc-area{padding-top:54px;}
  .steps-grid{grid-template-columns:1fr 1fr;}
  .intro-card{padding:26px 24px;}
  .cta-final-inner{padding:36px 28px;}
  .narrow-cta-inner{padding:24px;}
}
@media screen and (max-width:639px){
  .grid-container{padding-left:16px;padding-right:16px;}
  .header-main{height:64px;gap:10px;}
  .header-top-inner span:first-child{display:none;}
  .header-top-inner{justify-content:center;}
  .logo-line-1{font-size:16px;}
  .logo-line-2{font-size:11px;}
  .cat-hero{padding-top:42px;padding-bottom:38px;}
  .cat-hero h1{margin-top:16px;}
  .hero-mini-stats{gap:10px;}
  .hero-mini-stats li{font-size:12px;gap:6px;}
  .intro-band{margin-top:0;padding-top:22px;}
  .guide-block{padding:26px 20px;}
  .guide-block::before{font-size:72px;top:-22px;}
  .steps-grid{grid-template-columns:1fr;}
  .mini-tile{margin-bottom:14px;}
  .narrow-cta-inner{align-items:flex-start;flex-direction:column;}
  .footer-bottom{flex-direction:column;}
  .cta-final{padding:54px 0 60px;}
  .section{padding:48px 0;}
}

/* roulang page: category2 */
:root{
  --bg-main:#0a1424;
  --bg-deep:#0d1b2e;
  --bg-soft:#10233a;
  --bg-glass:rgba(15,23,42,.58);
  --primary:#2d8cf0;
  --accent:#36cfc9;
  --warm:#ffb800;
  --txt:#e6edf5;
  --muted:#8ea3b9;
  --weak:#5b7088;
  --ice:#52a7ff;
  --ice-light:#6bc2ff;
  --border:rgba(255,255,255,.1);
  --border-strong:rgba(255,255,255,.18);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 8px 20px rgba(0,0,0,.22);
  --shadow-lg:0 12px 26px rgba(0,0,0,.26);
  --tr:.25s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg-main);color:var(--txt);font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Inter,Roboto,sans-serif;font-size:16px;line-height:1.75;letter-spacing:.2px;-webkit-font-smoothing:antialiased}
a{color:var(--ice);text-decoration:none;transition:color .25s ease,border-color .25s ease,background .25s ease}
a:hover{color:var(--ice-light)}
img{max-width:100%;display:block;border:0}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.row{max-width:1200px}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
h1{font-size:clamp(32px,4vw,44px)}
h2{font-size:clamp(24px,2.4vw,32px);position:relative}
h3{font-size:18px;font-weight:600}
.text-muted{color:var(--muted)}
.text-weak{color:var(--weak)}
img{background:rgba(255,255,255,.06)}

/* Header */
.site-header{position:sticky;top:0;z-index:100;width:100%}
.top-tipbar{background:rgba(6,14,25,.96);border-bottom:1px solid rgba(255,255,255,.06);font-size:13px;color:var(--muted)}
.top-tipbar .container{display:flex;justify-content:space-between;align-items:center;min-height:36px;gap:12px}
.tip-left{display:inline-flex;align-items:center;gap:8px}
.tip-left i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;box-shadow:0 0 8px rgba(54,207,201,.8)}
.header-main{background:rgba(10,20,36,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);transition:background .3s ease,box-shadow .3s ease}
.site-header.scrolled .header-main{background:rgba(8,17,30,.88);box-shadow:0 6px 18px rgba(0,0,0,.24)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:24px}
.logo-block{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-block a{display:flex;align-items:center;gap:10px}
.logo-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;box-shadow:0 0 22px rgba(45,140,240,.32)}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.lg-line1{font-size:14px;color:var(--ice);font-weight:600;letter-spacing:.5px}
.lg-line2{font-size:16px;font-weight:700;color:#fff;letter-spacing:1px}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-header{height:40px;padding:0 22px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:14px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 0 14px rgba(45,140,240,.3);transition:var(--tr)}
.btn-header:hover{color:#fff;filter:brightness(1.1);box-shadow:0 0 26px rgba(45,140,240,.44);transform:translateY(-1px)}
.btn-header:active{transform:scale(.98)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{display:inline-block;padding:8px 14px;font-size:15px;color:rgba(230,237,245,.84);border-radius:8px;position:relative;transition:var(--tr)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transform-origin:left center;transition:transform .28s ease}
.nav-link:hover{color:#eaf3ff;background:rgba(255,255,255,.04)}
.nav-link.active{color:#cfe6ff}
.nav-link.active::after{transform:scaleX(1)}
.nav-toggle{width:44px;height:44px;background:rgba(255,255,255,.05);border:1px solid var(--border);border-radius:var(--radius-sm);display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:#d6e4f5;border-radius:4px;transition:var(--tr)}
.nav-toggle:hover span{background:#fff}

/* Mobile drawer */
.mobile-drawer{position:fixed;inset:0;background:rgba(8,16,28,.96);backdrop-filter:blur(22px);z-index:200;transform:translateY(-100%);transition:transform .45s cubic-bezier(.4,0,.2,1);overflow-y:auto}
.mobile-drawer.open{transform:translateY(0)}
.drawer-inner{min-height:100vh;display:flex;flex-direction:column;padding:24px 24px 32px}
.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.drawer-brand{display:flex;align-items:center;gap:8px}
.drawer-brand .logo-mark{width:36px;height:36px;font-size:15px}
.drawer-brand .lg-line1{font-size:13px}
.drawer-brand .lg-line2{font-size:16px}
.drawer-close{width:44px;height:44px;border:1px solid var(--border);background:rgba(255,255,255,.04);border-radius:50%;color:#c9d8eb;font-size:22px;cursor:pointer;transition:var(--tr)}
.drawer-close:hover{border-color:var(--ice);color:#fff}
.mobile-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:32px}
.mobile-nav a{padding:16px 16px;border-bottom:1px solid rgba(255,255,255,.07);font-size:16px;color:#d6e4f5;display:flex;align-items:center;justify-content:space-between;transition:var(--tr)}
.mobile-nav a.active{color:var(--ice);background:rgba(45,140,240,.1)}
.mobile-nav a:hover{border-color:var(--ice);color:#fff;padding-left:22px}
.mobile-drawer-bottom{margin-top:auto;border-top:1px solid rgba(255,255,255,.09);padding-top:20px;display:grid;gap:14px}
.drawer-contact{display:grid;gap:8px}
.drawer-contact span{font-size:13px;color:var(--weak)}
.drawer-contact strong{color:#c7d6e8;font-weight:600}
.drawer-slogan{font-size:13px;color:var(--weak);line-height:1.7}

/* Page hero */
.page-hero{position:relative;padding:80px 0 68px;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;border-bottom:1px solid rgba(255,255,255,.06)}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,20,36,.96),rgba(10,20,36,.86) 54%,rgba(14,28,46,.64))}
.page-hero .container{position:relative;z-index:2}
.breadcrumb-wrap{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--weak);margin-bottom:24px;flex-wrap:wrap}
.breadcrumb-wrap a{color:var(--weak);transition:var(--tr)}
.breadcrumb-wrap a:hover{color:var(--ice)}
.breadcrumb-wrap i{font-style:normal;color:rgba(255,255,255,.25)}
.cat-label{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(82,167,255,.4);background:rgba(45,140,240,.14);color:var(--ice);padding:4px 14px;border-radius:100px;font-size:13px;margin-bottom:16px}
.cat-label::before{content:"";width:6px;height:6px;background:var(--accent);border-radius:50%;box-shadow:0 0 10px rgba(54,207,201,.9)}
.hero-title{font-size:clamp(30px,4vw,44px);line-height:1.25;letter-spacing:.5px;margin-bottom:12px}
.hero-title .hero-em{color:var(--ice)}
.hero-subtitle{max-width:700px;font-size:16px;line-height:1.9;color:var(--muted);margin-bottom:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:16px}
.hero-badges .hd-item{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:#c0d0df;background:rgba(15,23,42,.4);border:1px solid var(--border);border-radius:12px;padding:11px 18px;backdrop-filter:blur(8px)}
.hero-badges .hd-item i{font-style:normal;width:8px;height:8px;border-radius:50%;display:inline-block}

/* Section */
.section{padding:90px 0}
.section-top{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:44px;gap:18px;flex-wrap:wrap}
.section-heading{max-width:680px}
.sec-mark{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ice);letter-spacing:2px;margin-bottom:12px}
.sec-mark::before{content:"";width:120px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.section-heading.dark h2{color:#fff}
.section-heading h2{color:#f0f5fb}
.section-lead{margin-top:18px;font-size:15px;line-height:1.9;color:var(--muted)}
.section-link{font-size:14px;color:var(--ice);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.section-link i{transition:transform .25s ease;font-style:normal;font-size:18px}
.section-link:hover i{transform:translateX(4px)}

/* Card tiles */
.cat-topic-grid{gap:24px}
.topic-card{background:rgba(255,255,255,.045);border:1px solid var(--border);border-radius:var(--radius);padding:28px 25px;transition:var(--tr);height:100%}
.topic-card:hover{background:rgba(255,255,255,.07);border-color:rgba(82,167,255,.35);box-shadow:var(--shadow);transform:translateY(-4px)}
.topic-symbol{width:50px;height:50px;border-radius:14px;background:linear-gradient(135deg,rgba(45,140,240,.22),rgba(54,207,201,.16));display:flex;align-items:center;justify-content:center;color:var(--ice);margin-bottom:18px}
.topic-card h3{color:#f0f7ff;font-size:18px;margin-bottom:10px}
.topic-card p{color:var(--muted);font-size:14px;line-height:1.8;margin-bottom:0}
.topic-card .topic-tag{display:inline-flex;gap:6px;align-items:center;margin-top:18px;font-size:13px;color:var(--weak)}
.topic-tag span{display:inline-block;padding:2px 10px;border-radius:8px;background:rgba(45,140,240,.09);border:1px solid rgba(82,167,255,.25);color:#9dc6ff;font-size:12px}

/* Feature cross layout */
.feature-block{padding:24px 0}
.feature-wrap{display:flex;align-items:center;gap:42px}
.feature-media{flex:0 0 44%;max-width:44%}
.feature-figure{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.feature-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.feature-figure:hover img{transform:scale(1.04)}
.figure-badge{position:absolute;left:14px;top:14px;background:rgba(10,20,36,.75);border:1px solid rgba(255,255,255,.18);color:#fff;font-size:12px;padding:5px 12px;border-radius:100px;backdrop-filter:blur(8px)}
.feature-body{flex:1 1 auto}
.feature-eyebrow{font-size:13px;color:var(--ice);display:flex;align-items:center;gap:8px;margin-bottom:12px}
.feature-eyebrow::before{content:"";width:14px;height:2px;background:var(--accent)}
.feature-body h2{font-size:clamp(22px,2vw,28px);color:#eef4fb;margin-bottom:16px}
.feature-body p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:18px}
.feature-points{list-style:none;display:grid;gap:12px;margin:0 0 22px}
.feature-points li{display:flex;gap:10px;align-items:flex-start;color:#cbd9e7;font-size:15px}
.feature-points li::before{content:"";width:6px;height:6px;background:var(--accent);border-radius:2px;flex-shrink:0;margin-top:11px;box-shadow:0 0 8px rgba(54,207,201,.7)}
.feature-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600}
.feature-link i{transition:transform .25s ease;font-style:normal}
.feature-link:hover i{transform:translateX(4px)}
.feature-block.reverse .feature-wrap{flex-direction:row-reverse}

/* Aside mini card */
.info-aside{background:rgba(15,23,42,.55);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(12px);border-radius:18px;padding:26px;box-shadow:var(--shadow)}
.aside-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(45,140,240,.24),rgba(54,207,201,.14));display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.info-aside h3{color:#f0f6ff;font-size:20px;margin-bottom:8px}
.info-aside>p{color:var(--muted);font-size:14px;line-height:1.8;margin-bottom:22px}
.mini-nav-title{font-size:14px;color:var(--weak);margin:18px 0 10px;letter-spacing:1px}
.mini-nav{list-style:none;display:grid;gap:4px}
.mini-nav li a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:10px;color:#c2d1e1;font-size:14px;transition:var(--tr)}
.mini-nav li a::before{content:"";width:5px;height:5px;border-radius:50%;background:rgba(82,167,255,.6);transition:var(--tr)}
.mini-nav li a:hover{background:rgba(45,140,240,.12);color:#fff;padding-left:16px}
.mini-nav li a:hover::before{background:var(--accent)}
.aside-divider{border:0;border-top:1px solid rgba(255,255,255,.1);margin:22px 0}
.aside-contact strong{color:#e3ebf3;font-size:15px;font-weight:600;display:block;margin-top:5px}
.aside-contact span{color:var(--weak);font-size:13px;display:block}

/* steps */
.step-section{background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.06)}
.steps-grid{display:flex;flex-wrap:wrap;gap:24px;margin-top:10px}
.step-item{flex:1 1 220px;min-width:200px;position:relative;padding:24px 20px;border:1px solid var(--border);background:rgba(255,255,255,.04);border-radius:var(--radius)}
.step-num{font-size:15px;color:var(--ice);font-weight:700;background:rgba(52,140,240,.12);width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(82,167,255,.28);margin-bottom:16px}
.step-item h3{font-size:16px;color:#eaf1fa;margin-bottom:8px}
.step-item p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}
.step-line{display:flex;align-items:center;justify-content:center;margin:22px 0 0;color:var(--weak)}
.step-item::before{content:"";position:absolute;top:-2px;left:20px;right:20px;height:1px;background:linear-gradient(90deg,transparent,rgba(54,207,201,.5),transparent);opacity:0;transition:opacity .3s ease}
.step-item:hover::before{opacity:1}

/* CTA band */
.cta-band{position:relative;padding:90px 0 70px}
.cta-inner{background:rgba(11,32,52,.8);border:1px solid rgba(82,167,255,.18);border-radius:22px;padding:46px 36px;position:relative;overflow:hidden;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;box-shadow:var(--shadow)}
.cta-inner::before{content:"";position:absolute;top:0;left:-30%;width:70%;height:100%;background:linear-gradient(100deg,transparent,rgba(54,207,201,.06),transparent);transform:skewX(-12deg);animation:scan 5s infinite linear}
@keyframes scan{0%{left:-40%}100%{left:110%}}
.cta-left{max-width:720px;position:relative;z-index:2}
.cta-left h3{font-size:clamp(20px,2vw,26px);color:#fff;line-height:1.5;margin-bottom:8px}
.cta-left p{color:var(--muted);font-size:15px;line-height:1.8}
.cta-btns{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2}
.btn-primary{height:50px;padding:0 34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 0 18px rgba(45,140,240,.3);border:0;color:#fff;font-size:16px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:var(--tr)}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 0 28px rgba(45,140,240,.48);transform:translateY(-1px);color:#fff}
.btn-primary:active{transform:scale(.98)}
.btn-secondary{height:50px;padding:0 30px;border:1px solid rgba(255,255,255,.32);border-radius:10px;background:transparent;color:#fff;font-size:15px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--tr)}
.btn-secondary:hover{background:rgba(255,255,255,.08);border-color:var(--ice);color:#fff}

/* FAQ */
.faq-area{background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.06)}
.faq-layout{display:flex;gap:42px}
.faq-intro{flex:0 0 34%;max-width:34%}
.faq-guide-list{list-style:none;display:grid;gap:8px;margin-top:26px}
.faq-guide-list li a{display:flex;align-items:center;gap:10px;padding:11px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:var(--tr)}
.faq-guide-list li a::before{content:"";width:6px;height:6px;border:1px solid var(--ice);transform:rotate(45deg);transition:var(--tr)}
.faq-guide-list li a:hover{color:#fff;background:rgba(45,140,240,.1);padding-left:18px}
.faq-wrap{flex:1;max-width:720px}
.acc-item{background:rgba(15,23,42,.6);border:1px solid var(--border);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:var(--tr)}
.acc-item:hover{border-color:rgba(82,167,255,.22)}
.acc-title{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;color:#dbe8f4;font-size:16px;font-weight:600;cursor:pointer;background:transparent;border:0;width:100%;text-align:left;line-height:1.5}
.acc-title .acc-icon{width:28px;height:28px;border-radius:50%;border:1px solid rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-style:normal;font-size:18px;font-weight:400;color:var(--ice);transition:transform .3s ease;flex-shrink:0}
.acc-item.open .acc-title .acc-icon{transform:rotate(45deg)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.4,0,.2,1)}
.acc-inner{padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.85}

/* Footer */
.site-footer{background:#08121f;border-top:1px solid rgba(120,170,220,.14);padding:70px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.logo-footer{display:flex;align-items:center;gap:12px}
.logo-footer .logo-mark{width:38px;height:38px;font-size:16px}
.footer-brand p{margin:20px 0 0;font-size:14px;color:var(--muted);line-height:1.9;max-width:340px}
.footer-title{font-size:15px;color:#fff;font-weight:600;margin-bottom:18px;position:relative}
.footer-title::after{content:"";display:block;width:24px;height:2px;background:var(--primary);margin-top:8px;border-radius:2px}
.footer-links{list-style:none;display:grid;gap:10px;margin:0}
.footer-links li a{color:var(--muted);font-size:14px;transition:var(--tr)}
.footer-links li a:hover{color:var(--ice)}
.footer-contact{list-style:none;display:grid;gap:14px;margin:0}
.footer-contact li{display:grid;gap:3px}
.contact-label{color:var(--weak);font-size:12px}
.footer-contact strong{color:#d8e4f1;font-size:14px;font-weight:600}
.social-row{display:flex;gap:9px;margin-top:20px}
.social-spot{width:34px;height:34px;border-radius:10px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--muted);transition:var(--tr)}
.social-spot:hover{border-color:var(--ice);color:var(--ice);box-shadow:0 0 12px rgba(82,167,255,.35)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding:18px 0 24px;font-size:13px;color:var(--weak)}
.footer-bottom .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.footer-bottom a{color:var(--weak)}
.footer-bottom a:hover{color:var(--ice)}

/* Responsive */
@media (max-width:1024px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .btn-header{display:none}
  .section{padding:64px 0}
  .feature-wrap{flex-direction:column;gap:28px}
  .feature-block.reverse .feature-wrap{flex-direction:column}
  .feature-media{flex:0 0 100%;max-width:100%}
  .faq-layout{flex-direction:column;gap:28px}
  .faq-intro{flex:0 0 100%;max-width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .top-tipbar .tip-right{display:none}
  .page-hero{padding:54px 0 44px}
  .hero-badges{gap:10px}
  .hero-badges .hd-item{width:100%}
  .section{padding:48px 0}
  .section-top{margin-bottom:28px;flex-direction:column;align-items:flex-start}
  .cat-topic-grid .columns{padding:0 16px 20px}
  .topic-card{padding:20px 18px}
  .cta-inner{padding:32px 12px;flex-direction:column}
  .cta-btns{width:100%}
  .btn-primary,.btn-secondary{width:100%}
  .acc-title{padding:16px 18px}
  .acc-inner{padding:0 20px 18px}
  .header-inner{min-height:60px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .logo-footer p{max-width:100%}
}

/* roulang page: category3 */
:root {
            --bg-deep: #0a1424;
            --bg-panel: #0d1b2e;
            --bg-soft: #101f33;
            --bg-elevate: rgba(15, 25, 40, 0.72);
            --primary: #2d8cf0;
            --secondary: #36cfc9;
            --warning: #ffb800;
            --link: #52a7ff;
            --link-hover: #6bc2ff;
            --text-main: #e6edf5;
            --text-sub: #8ea3b9;
            --text-weak: #5b7088;
            --border: rgba(255, 255, 255, 0.1);
            --border-strong: rgba(255, 255, 255, 0.18);
            --radius: 14px;
            --radius-sm: 10px;
            --shadow: 0 8px 20px rgba(0, 0, 0, 0.22);
            --shadow-lg: 0 12px 26px rgba(0, 0, 0, 0.26);
            --glass-bg: rgba(15, 23, 42, 0.58);
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Roboto", "Inter", sans-serif;
            --ease: cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            background: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.7;
            letter-spacing: 0.2px;
            -webkit-font-smoothing: antialiased;
        }

        body.no-scroll {
            overflow: hidden;
        }

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

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

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

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

        .section-block {
            padding: 90px 0;
        }

        .glass {
            background: var(--glass-bg);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 0.8px solid rgba(255, 255, 255, 0.14);
        }

        .section-head-row {
            margin-bottom: 36px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--secondary);
            letter-spacing: 0.1em;
            background: rgba(54, 207, 201, 0.1);
            border: 1px solid rgba(54, 207, 201, 0.18);
            padding: 6px 12px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .section-head h2,
        .section-head h3 {
            margin: 0;
            font-size: clamp(24px, 2.4vw + 14px, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: #f2f6fb;
        }

        .section-head .section-title-note {
            margin: 10px 0 0;
            font-size: 15px;
            color: var(--text-sub);
            max-width: 720px;
        }

        .section-deco {
            width: 120px;
            height: 2px;
            border-radius: 2px;
            margin-bottom: 18px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            font-family: inherit;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s var(--ease);
            background: transparent;
            color: #fff;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 0 16px rgba(45, 140, 240, 0.3);
            border: none;
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 24px rgba(45, 140, 240, 0.42);
            color: #fff;
        }

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

        .btn-secondary {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.28);
            color: #fff;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--link);
            color: #fff;
        }

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

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: auto;
            padding: 6px 2px;
            color: var(--text-main);
            font-weight: 500;
            background: transparent;
            border: none;
            font-size: 15px;
        }

        .btn-text .arrow {
            transition: transform 0.3s var(--ease);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        .btn-block {
            width: 100%;
        }

        .btn:focus-visible,
        .nav-toggle:focus-visible {
            outline: 1px solid var(--link);
            outline-offset: 3px;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 1px solid var(--link);
            outline-offset: 3px;
        }

        .top-strip {
            background: #07111f;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-sub);
            font-size: 13px;
            padding: 7px 0;
            overflow: hidden;
        }

        .top-strip-inner {
            display: flex;
            justify-content: flex-end;
            align-items: center;
            gap: 24px;
        }

        .top-strip span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        .top-strip .strip-icon {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--secondary);
            box-shadow: 0 0 8px var(--secondary);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 20, 36, 0.82);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(120, 170, 220, 0.14);
            transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
        }

        .site-header.scrolled {
            background: rgba(7, 14, 26, 0.94);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
        }

        .header-main {
            display: flex;
            align-items: center;
            min-height: 70px;
            gap: 16px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .brand .logo-mark,
        .logo-footer .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 11px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 0 14px rgba(45, 140, 240, 0.28);
        }

        .logo-text {
            line-height: 1.1;
            display: inline-flex;
            flex-direction: column;
        }

        .logo-text .lg-line1 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
        }

        .logo-text .lg-line2 {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-sub);
            letter-spacing: 0.02em;
            margin-top: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 24px 16px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: #71c9ff;
        }

        .nav-link.active {
            color: #5baaff;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 16px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .header-actions {
            display: flex;
            align-items: center;
            margin-left: 6px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            margin-left: auto;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            cursor: pointer;
            padding: 0;
            flex-direction: column;
            gap: 5px;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s var(--ease);
        }

        .mobile-menu {
            position: fixed;
            inset: 0;
            z-index: 200;
            background: rgba(7, 14, 26, 0.97);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s var(--ease);
            overflow-y: auto;
        }

        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-close {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text-main);
            font-size: 24px;
            line-height: 1;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .mobile-close:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--link);
        }

        .mobile-nav {
            padding: 16px 0 28px;
            display: flex;
            flex-direction: column;
        }

        .mobile-link {
            display: block;
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            padding: 15px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.25s ease;
        }

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

        .mobile-footer-links {
            padding: 16px 0 40px;
        }

        .mobile-footer-links p {
            color: var(--text-sub);
            font-size: 14px;
            margin: 16px 0 0;
        }

        .page-hero {
            position: relative;
            padding: 78px 0 64px;
            background: linear-gradient(180deg, rgba(10, 18, 31, 0.92), rgba(7, 15, 26, 0.72)), url("/assets/images/backpic/back-3.png") center center / cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -120px;
            right: 10%;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(45, 140, 240, 0.22), transparent 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 30px;
        }

        .breadcrumb a {
            color: var(--text-sub);
            text-decoration: none;
        }

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

        .breadcrumb span {
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb .breadcrumb-sep {
            width: 14px;
            height: 1px;
            background: rgba(255, 255, 255, 0.3);
            display: inline-block;
        }

        .hero-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 48px;
        }

        .hero-content {
            flex: 1 1 auto;
            max-width: 680px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--secondary);
            margin-bottom: 18px;
        }

        .eyebrow::before {
            content: "";
            width: 22px;
            height: 1px;
            background: var(--secondary);
        }

        .page-hero h1 {
            font-size: clamp(36px, 5vw + 18px, 56px);
            line-height: 1.15;
            font-weight: 800;
            color: #fff;
            margin: 0 0 20px;
            letter-spacing: 0.01em;
        }

        .page-hero .lead {
            font-size: 17px;
            color: #b8c7da;
            max-width: 620px;
            margin: 0 0 34px;
            line-height: 1.9;
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .hero-note {
            width: 340px;
            display: grid;
            gap: 16px;
            flex-shrink: 0;
        }

        .note-card {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            border-radius: var(--radius);
            background: rgba(15, 23, 42, 0.52);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: border-color 0.3s ease, transform 0.3s var(--ease);
        }

        .note-card:hover {
            border-color: rgba(82, 167, 255, 0.35);
            transform: translateY(-2px);
        }

        .note-icon {
            flex-shrink: 0;
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(45, 140, 240, 0.15);
            color: var(--secondary);
            font-size: 14px;
        }

        .note-card strong {
            display: block;
            font-size: 15px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .note-card p {
            margin: 0;
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.5;
        }

        .feature-banner {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            background: rgba(15, 25, 40, 0.58);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .feature-media {
            position: relative;
            min-height: 400px;
            overflow: hidden;
        }

        .feature-media img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 20, 36, 0.15), rgba(10, 20, 36, 0.42));
        }

        .corner-note {
            position: absolute;
            right: 16px;
            bottom: 10px;
            z-index: 2;
            font-size: 22px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.09);
            letter-spacing: 1px;
            pointer-events: none;
        }

        .feature-content {
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .feature-content h2 {
            margin: 0 0 14px;
            font-size: clamp(24px, 2vw + 12px, 32px);
            line-height: 1.3;
            color: #fff;
            font-weight: 700;
        }

        .feature-content .feature-desc {
            color: var(--text-sub);
            font-size: 15px;
            margin: 0 0 18px;
            line-height: 1.8;
        }

        .step-list {
            margin: 10px 0 0;
            display: grid;
            gap: 0;
        }

        .step-item {
            display: flex;
            gap: 18px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .step-item:last-child {
            border-bottom: 0;
            padding-bottom: 4px;
        }

        .step-num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(45, 140, 240, 0.12);
            border: 1px solid rgba(45, 140, 240, 0.22);
            color: var(--secondary);
            font-size: 14px;
            font-weight: 700;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.92);
            margin: 0 0 6px;
            line-height: 1.45;
        }

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

        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            align-items: start;
        }

        .topic-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
            transition: transform 0.35s var(--ease), border-color 0.35s ease, background 0.35s ease;
        }

        .topic-card:hover {
            transform: translateY(-4px);
            border-color: rgba(82, 167, 255, 0.35);
            background: rgba(255, 255, 255, 0.06);
        }

        .topic-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }

        .topic-ico {
            width: 44px;
            height: 44px;
            border-radius: 13px;
            background: linear-gradient(135deg, rgba(45, 140, 240, 0.2), rgba(54, 207, 201, 0.2));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            flex-shrink: 0;
        }

        .topic-head h3 {
            margin: 0;
            font-size: 20px;
            color: #f3f7fb;
            font-weight: 700;
        }

        .topic-head p {
            margin: 2px 0 0;
            font-size: 13px;
            color: var(--text-weak);
        }

        .topic-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .topic-list li {
            display: flex;
            gap: 14px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            transition: background 0.25s ease;
            border-radius: 8px;
        }

        .topic-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .topic-list .dot {
            flex-shrink: 0;
            width: 8px;
            height: 8px;
            border-radius: 2px;
            margin-top: 9px;
            background: var(--secondary);
            box-shadow: 0 0 8px rgba(54, 207, 201, 0.45);
        }

        .topic-list strong {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 4px;
        }

        .topic-list span.desc {
            display: block;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        .entry-belt-section {
            padding-bottom: 0;
        }

        .entry-belt {
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            background: linear-gradient(135deg, rgba(11, 35, 55, 0.92), rgba(16, 35, 58, 0.9));
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            padding: 38px 42px;
            box-shadow: var(--shadow);
        }

        .entry-belt::before {
            content: "";
            position: absolute;
            top: -70%;
            left: -140px;
            width: 220px;
            height: 240%;
            background: linear-gradient(100deg, transparent, rgba(120, 180, 255, 0.08), transparent);
            transform: rotate(14deg);
            pointer-events: none;
        }

        .belt-badge {
            display: inline-block;
            font-size: 13px;
            color: var(--warning);
            border: 1px solid rgba(255, 184, 0, 0.3);
            background: rgba(255, 184, 0, 0.07);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .belt-main h2 {
            margin: 0 0 8px;
            font-size: clamp(22px, 2vw + 14px, 32px);
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
        }

        .belt-main p {
            margin: 0;
            color: var(--text-sub);
            font-size: 15px;
        }

        .belt-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .faq-section {
            background: rgba(255, 255, 255, 0.015);
        }

        .faq-intro {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 46px;
        }

        .faq-intro h2 {
            font-size: clamp(26px, 2.6vw + 16px, 36px);
            color: #f6f9fc;
            font-weight: 700;
            margin: 0 0 14px;
            line-height: 1.3;
        }

        .faq-intro > p {
            color: var(--text-sub);
            font-size: 15px;
            margin: 0;
        }

        .faq-wrap {
            max-width: 980px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: rgba(15, 23, 42, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color 0.35s ease, background 0.35s ease;
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
        }

        .faq-item:hover {
            border-color: rgba(82, 167, 255, 0.32);
        }

        .faq-item.active {
            border-color: rgba(82, 167, 255, 0.48);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-family: inherit;
            text-align: left;
            color: rgba(255, 255, 255, 0.94);
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            transition: color 0.25s ease;
        }

        .faq-question:hover {
            color: var(--link-hover);
        }

        .faq-ico {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-style: normal;
            font-size: 20px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            transition: transform 0.3s var(--ease), background 0.3s ease;
        }

        .faq-item.active .faq-ico {
            transform: rotate(45deg);
            background: rgba(45, 140, 240, 0.16);
            border-color: rgba(45, 140, 240, 0.45);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s var(--ease);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 26px 24px 26px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.85;
        }

        .faq-answer-inner p {
            margin: 0;
        }

        .final-cta {
            padding-bottom: 150px;
        }

        .final-cta-inner {
            border-radius: 20px;
            border: 1px solid rgba(82, 167, 255, 0.22);
            background: linear-gradient(135deg, #0b2337, #10233a);
            padding: 56px 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            position: relative;
            overflow: hidden;
        }

        .final-cta-inner::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -160px;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(45, 140, 240, 0.3), transparent 70%);
        }

        .final-cta-inner .cta-tag {
            font-size: 13px;
            color: var(--secondary);
            letter-spacing: 0.1em;
            margin-bottom: 12px;
            display: block;
        }

        .final-cta-inner h2 {
            font-size: clamp(28px, 3vw + 16px, 42px);
            color: #fff;
            margin: 0 0 14px;
            line-height: 1.3;
            font-weight: 800;
        }

        .final-cta-inner p {
            margin: 0;
            color: var(--text-sub);
            font-size: 15px;
            max-width: 560px;
            line-height: 1.8;
        }

        .final-cta-inner .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }

        .site-footer {
            background: #081624;
            border-top: 1px solid rgba(120, 170, 220, 0.14);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
        }

        .logo-footer {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .logo-footer .logo-mark {
            width: 42px;
            height: 42px;
            border-radius: 13px;
            font-size: 18px;
        }

        .logo-text .lg-line1 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .logo-text .lg-line2 {
            font-size: 13px;
            font-weight: 500;
            color: #90a6bf;
            margin-top: 1px;
        }

        .footer-brand > p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.9;
            margin: 0;
            max-width: 320px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #e9f0f7;
            margin-bottom: 18px;
            /* no heading semantics */
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 12px;
        }

        .footer-links a {
            color: var(--text-sub);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .footer-contact {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 16px;
        }

        .footer-contact li {
            display: flex;
            flex-direction: column;
        }

        .footer-contact .contact-label {
            font-size: 12px;
            color: var(--text-weak);
            margin-bottom: 4px;
        }

        .footer-contact strong {
            color: #b9cbdf;
            font-size: 14px;
            font-weight: 500;
            word-break: break-all;
        }

        .social-row {
            display: flex;
            gap: 10px;
            margin-top: 22px;
        }

        .social-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: all 0.3s var(--ease);
            background: rgba(255, 255, 255, 0.03);
        }

        .social-icon:hover {
            color: #fff;
            border-color: var(--link);
            box-shadow: 0 0 14px rgba(45, 140, 240, 0.36);
            background: rgba(45, 140, 240, 0.12);
        }

        .social-icon svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #4c6078;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: #6384a5;
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: var(--link-hover);
        }

        .reveal-init {
            opacity: 0;
            transform: translateY(12px);
            transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
        }

        .reveal-init.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media screen and (max-width: 1024px) {
            .main-nav {
                display: none;
            }

            .header-actions {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .footer-brand > p {
                max-width: 100%;
            }

            .feature-banner {
                grid-template-columns: 1fr;
            }

            .feature-media {
                min-height: 300px;
            }

            .hero-flex {
                gap: 32px;
            }
        }

        @media screen and (max-width: 860px) {
            .section-block {
                padding: 70px 0;
            }

            .hero-flex {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-note {
                width: 100%;
                grid-template-columns: repeat(2, 1fr);
            }

            .entry-belt {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media screen and (max-width: 640px) {
            .section-block {
                padding: 56px 0;
            }

            .top-strip {
                display: none;
            }

            .header-main {
                min-height: 62px;
            }

            .brand .logo-mark {
                width: 34px;
                height: 34px;
                border-radius: 10px;
                font-size: 16px;
            }

            .logo-text .lg-line1 {
                font-size: 16px;
            }

            .logo-text .lg-line2 {
                font-size: 12px;
            }

            .page-hero {
                padding: 58px 0 48px;
            }

            .breadcrumb {
                margin-bottom: 22px;
            }

            .hero-note {
                grid-template-columns: 1fr;
            }

            .page-hero .lead {
                font-size: 16px;
            }

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

            .feature-content {
                padding: 26px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .entry-belt {
                padding: 28px 24px;
            }

            .belt-actions {
                width: 100%;
            }

            .belt-actions .btn {
                width: 100%;
            }

            .faq-question {
                padding: 18px 18px;
                font-size: 16px;
            }

            .faq-answer-inner {
                padding: 0 18px 20px 18px;
            }

            .final-cta {
                padding-bottom: 100px;
            }

            .final-cta-inner {
                padding: 38px 26px;
                flex-direction: column;
                align-items: flex-start;
            }

            .final-cta-inner .cta-actions {
                width: 100%;
            }

            .final-cta-inner .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .footer-brand > p {
                max-width: 100%;
            }
        }