/* roulang page: index */
:root {
            --primary: #3E86F5;
            --primary-hover: #2C6FE0;
            --primary-dark: #1E57B8;
            --accent: #17B8C6;
            --highlight: #FFAE33;
            --success: #2FA875;
            --danger: #F26D5F;
            --title-color: #183049;
            --text-color: #4A617C;
            --weak-color: #8CA0B7;
            --border-color: #DDE8F2;
            --line-color: #EDF3F8;
            --bg-body: #F7FAFD;
            --bg-white: #FFFFFF;
            --bg-blue-light: #F0F7FF;
            --bg-footer: #EAF2FA;
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow: 0 8px 24px rgba(23, 71, 128, 0.08);
            --shadow-hover: 0 14px 36px rgba(23, 71, 128, 0.12);
            --container: 1320px;
            --space: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
            color: var(--text-color);
            background: var(--bg-white);
            font-size: 16px;
            line-height: 1.85;
            -webkit-font-smoothing: antialiased;
        }

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

        ul {
            list-style: none;
        }

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

        button {
            border: 0;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ---------- Header ---------- */
        #siteHeader {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--line-color);
            transition: box-shadow .3s ease, background .3s ease;
        }

        #siteHeader.scrolled {
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 6px 24px rgba(23, 71, 128, 0.06);
        }

        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 40px;
            height: 76px;
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            gap: 20px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 23px;
            font-weight: 700;
            color: var(--title-color);
            letter-spacing: .3px;
            white-space: nowrap;
        }

        .brand-mark {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 6px 14px rgba(62, 134, 245, 0.28);
        }

        .brand-tag {
            font-size: 12px;
            font-weight: 600;
            background: rgba(62, 134, 245, 0.1);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 999px;
            line-height: 1.4;
            margin-left: -2px;
        }

        .main-nav {
            align-items: center;
        }

        .main-nav ul {
            display: flex;
            gap: 28px;
            align-items: center;
        }

        .main-nav li a {
            position: relative;
            font-weight: 500;
            color: var(--title-color);
            transition: color .2s;
            padding: 4px 2px;
            white-space: nowrap;
        }

        .main-nav li a::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: -2px;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: translateX(-50%);
            transition: width .28s ease;
        }

        .main-nav li a:hover {
            color: var(--primary);
        }

        .main-nav li a:hover::after,
        .main-nav li a.active::after {
            width: 100%;
        }

        .main-nav li a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-left {
            display: flex;
            justify-content: flex-start;
        }

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

        .nav-right .main-nav {
            display: flex;
        }

        .nav-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 42px;
            padding: 0 22px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: all .25s;
            white-space: nowrap;
            border: 1px solid var(--primary);
            box-shadow: 0 8px 20px rgba(62, 134, 245, 0.16);
        }

        .nav-btn:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(44, 111, 224, 0.2);
        }

        .nav-btn:active {
            transform: translateY(0);
            background: var(--primary-dark);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--title-color);
            font-size: 20px;
            border: 1px solid var(--border-color);
        }

        .mobile-menu {
            display: none;
        }

        /* ---------- Hero ---------- */
        .home-hero {
            background: var(--bg-white);
            padding: 64px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .home-hero::before {
            content: "";
            position: absolute;
            width: 520px;
            height: 520px;
            left: -180px;
            top: -160px;
            background: radial-gradient(circle, rgba(62, 134, 245, 0.10), rgba(62, 134, 245, 0));
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.08fr 0.92fr;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-info .hero-tagline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(23, 184, 198, 0.09);
            color: #1099a8;
            font-size: 14px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 22px;
        }

        .hero-info h1 {
            font-size: clamp(32px, 4.6vw, 50px);
            font-weight: 700;
            line-height: 1.22;
            color: var(--title-color);
            margin-bottom: 20px;
            letter-spacing: 0px;
        }

        .hero-info .lead {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-color);
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 50px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: all .25s ease;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            box-shadow: 0 10px 24px rgba(62, 134, 245, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(44, 111, 224, 0.24);
        }

        .btn-primary:active {
            transform: translateY(1px);
            background: var(--primary-dark);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid #C4DAF4;
        }

        .btn-outline:hover {
            background: rgba(62, 134, 245, 0.06);
            border-color: var(--primary);
        }

        .hero-cloud {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--weak-color);
            font-size: 14px;
        }

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

        .hero-visual {
            position: relative;
        }

        .hero-img-card {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: var(--bg-blue-light);
        }

        .hero-img-card img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }

        .hero-float-card {
            position: absolute;
            left: -18px;
            bottom: 36px;
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: 16px;
            padding: 16px 22px;
            box-shadow: var(--shadow-hover);
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .hero-float-card .icon {
            width: 42px;
            height: 42px;
            background: rgba(23, 184, 198, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            font-size: 18px;
        }

        .hero-float-card strong {
            display: block;
            color: var(--title-color);
            font-size: 17px;
            line-height: 1.3;
        }

        .hero-float-card span {
            color: var(--weak-color);
            font-size: 13px;
        }

        /* ---------- Section base ---------- */
        .section {
            padding: var(--space) 0;
        }

        .section-bg {
            background: var(--bg-body);
        }

        .section-sub {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--title-color);
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .section-desc {
            color: var(--text-color);
            font-size: 16px;
            max-width: 740px;
            margin-bottom: 42px;
            line-height: 1.8;
        }

        .section-head-center {
            text-align: center;
        }

        .section-head-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ---------- pitch ---------- */
        .pitch-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 24px;
        }

        .pitch-card {
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow);
            transition: all .3s ease;
            grid-column: span 3;
        }

        .pitch-card:nth-child(1) {
            grid-column: span 3;
        }

        .pitch-card:nth-child(2) {
            grid-column: span 3;
        }

        .pitch-card:nth-child(3) {
            grid-column: span 2;
            background: var(--bg-blue-light);
        }

        .pitch-card:nth-child(4) {
            grid-column: span 4;
        }

        .pitch-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(62, 134, 245, 0.28);
        }

        .pitch-icon {
            width: 56px;
            height: 56px;
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 23px;
            margin-bottom: 22px;
            background: rgba(62, 134, 245, 0.1);
            color: var(--primary);
        }

        .pitch-card:nth-child(3) .pitch-icon {
            background: rgba(23, 184, 198, 0.1);
            color: var(--accent);
        }

        .pitch-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 10px;
        }

        .pitch-card p {
            color: var(--text-color);
            line-height: 1.82;
        }

        .pitch-card .more-link {
            display: inline-block;
            margin-top: 14px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            transition: color .2s;
        }

        .pitch-card .more-link i {
            transition: transform .2s;
            font-size: 12px;
            margin-left: 4px;
        }

        .pitch-card .more-link:hover {
            color: var(--primary-hover);
        }

        .pitch-card .more-link:hover i {
            transform: translateX(4px);
        }

        /* ---------- demo ---------- */
        .demo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .demo-media {
            border-radius: var(--radius-lg);
            background: var(--bg-white);
            border: 1px solid var(--line-color);
            box-shadow: var(--shadow-hover);
            overflow: hidden;
        }

        .demo-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }

        .demo-steps {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .demo-step {
            display: flex;
            gap: 18px;
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: 18px;
            padding: 24px 26px;
            box-shadow: var(--shadow);
            transition: all .25s;
        }

        .demo-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(6px);
        }

        .step-num {
            flex: 0 0 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            background: var(--primary);
        }

        .demo-step:nth-child(2) .step-num {
            background: var(--accent);
        }

        .demo-step:nth-child(3) .step-num {
            background: var(--highlight);
            color: var(--title-color);
        }

        .demo-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 4px;
        }

        .demo-step p {
            color: var(--text-color);
            font-size: 15px;
        }

        /* ---------- proof / stats ---------- */
        .proof-section {
            padding: var(--space) 0;
            background: #fff;
        }

        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 60px;
        }

        .stat-card {
            text-align: center;
            background: var(--bg-body);
            border: 1px solid var(--line-color);
            border-radius: var(--radius-md);
            padding: 28px 18px;
        }

        .stat-card strong {
            display: block;
            font-size: 34px;
            color: var(--title-color);
            font-weight: 700;
            margin-bottom: 4px;
        }

        .stat-card strong em {
            font-style: normal;
            font-size: 16px;
            color: var(--primary);
            margin-left: 2px;
        }

        .stat-card span {
            color: var(--weak-color);
            font-size: 14px;
        }

        .proof-main {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            margin-bottom: 70px;
        }

        .quote-card {
            background: var(--bg-body);
            border: 1px solid var(--line-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .quote-card .quote-icon {
            color: var(--primary);
            font-size: 28px;
        }

        .quote-card blockquote {
            color: var(--title-color);
            font-size: 18px;
            line-height: 1.85;
            font-weight: 500;
        }

        .quote-user {
            display: flex;
            align-items: center;
            gap: 14px;
            color: var(--weak-color);
            font-size: 14px;
        }

        .quote-user i {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(62, 134, 245, 0.1);
            color: var(--primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .quote-user strong {
            display: block;
            color: var(--title-color);
            font-size: 15px;
        }

        .proof-note {
            background: linear-gradient(135deg, rgba(62, 134, 245, 0.08), rgba(23, 184, 198, 0.07));
            border-radius: var(--radius-lg);
            border: 1px solid rgba(62, 134, 245, 0.16);
            padding: 28px 30px;
            color: var(--text-color);
            font-size: 15px;
        }

        .proof-note strong {
            color: var(--primary);
        }

        /* news block */
        .news-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 32px;
        }

        .news-head h2 {
            font-size: 32px;
            color: var(--title-color);
            font-weight: 700;
            margin-bottom: 6px;
        }

        .news-head p {
            color: var(--weak-color);
        }

        .news-link-more {
            color: var(--primary);
            font-weight: 600;
            white-space: nowrap;
        }

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

        .news-card {
            display: flex;
            flex-direction: column;
            gap: 10px;
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all .3s;
            padding: 24px;
        }

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--weak-color);
        }

        .news-tag {
            display: inline-block;
            background: rgba(23, 184, 198, 0.08);
            color: #1099a8;
            padding: 2px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
        }

        .news-card h3 {
            font-size: 19px;
            color: var(--title-color);
            font-weight: 600;
            line-height: 1.45;
            transition: color .2s;
        }

        .news-card:hover h3 {
            color: var(--primary);
        }

        .news-card .news-excerpt {
            color: var(--text-color);
            font-size: 15px;
            line-height: 1.8;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 0;
        }

        .news-empty {
            grid-column: 1 / -1;
            background: #fff;
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-md);
            padding: 48px 20px;
            text-align: center;
            color: var(--weak-color);
            font-size: 15px;
        }

        .news-empty i {
            font-size: 34px;
            color: var(--border-color);
            display: block;
            margin-bottom: 16px;
        }

        /* ---------- pricing ---------- */
        .pricing-wrapper {
            display: flex;
            align-items: stretch;
            justify-content: center;
            gap: 24px;
            margin-top: 20px;
        }

        .price-card {
            flex: 1;
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: 22px;
            padding: 36px 30px;
            box-shadow: var(--shadow);
            transition: transform .3s, box-shadow .3s;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .price-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .price-card.featured {
            padding: 46px 36px;
            background: var(--bg-blue-light);
            border: 2px solid var(--primary);
            transform: scale(1.04);
            box-shadow: 0 20px 46px rgba(23, 71, 128, 0.12);
            z-index: 2;
        }

        .price-card.featured:hover {
            transform: scale(1.04) translateY(-8px);
        }

        .recommend {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 18px;
            border-radius: 999px;
            white-space: nowrap;
        }

        .price-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--title-color);
        }

        .price-price {
            margin: 20px 0;
            color: var(--title-color);
            font-weight: 700;
            line-height: 1;
        }

        .price-price strong {
            font-size: 42px;
        }

        .price-price span {
            font-size: 14px;
            color: var(--weak-color);
            font-weight: 400;
            margin-left: 4px;
        }

        .price-desc {
            color: var(--weak-color);
            font-size: 14px;
            margin-top: -8px;
            margin-bottom: 18px;
        }

        .price-list {
            margin: 18px 0 26px;
            flex: 1;
        }

        .price-list li {
            padding: 8px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-color);
            font-size: 15px;
        }

        .price-list li i {
            color: var(--primary);
            margin-top: 7px;
        }

        .price-btn {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            width: 100%;
            min-height: 50px;
            border: 1px solid var(--primary);
            color: var(--primary);
            border-radius: 10px;
            font-weight: 600;
            transition: all .25s;
        }

        .price-btn:hover {
            background: var(--primary);
            color: #fff;
        }

        .price-card.featured .price-btn {
            background: var(--primary);
            color: #fff;
        }

        .price-card.featured .price-btn:hover {
            background: var(--primary-hover);
        }

        /* ---------- FAQ ---------- */
        .faq-wrap {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color .2s, box-shadow .2s;
        }

        .faq-item.open {
            border-color: rgba(62, 134, 245, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-q {
            width: 100%;
            padding: 22px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--title-color);
            text-align: left;
        }

        .faq-q i {
            color: var(--weak-color);
            transition: transform .25s;
            flex: 0 0 auto;
        }

        .faq-item.open .faq-q i {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-a {
            display: none;
            padding: 0 24px 24px;
            background: rgba(62, 134, 245, 0.02);
            margin: 0 12px 12px 12px;
            border-radius: 12px;
            color: var(--text-color);
            line-height: 1.85;
        }

        .faq-item.open .faq-a {
            display: block;
            padding: 20px 22px;
        }

        /* ---------- CTA ---------- */
        .bottom-cta {
            background: var(--bg-blue-light);
            border-radius: 24px;
            margin: 32px auto 96px;
            max-width: 1320px;
            padding: 60px 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }

        .bottom-cta::after {
            content: "";
            position: absolute;
            width: 380px;
            height: 380px;
            right: -120px;
            top: -160px;
            background: radial-gradient(circle, rgba(62, 134, 245, 0.12), rgba(62, 134, 245, 0));
            border-radius: 50%;
        }

        .bottom-cta h2 {
            font-size: 30px;
            color: var(--title-color);
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .bottom-cta p {
            color: var(--text-color);
        }

        .bottom-cta .cta-btns {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }

        .btn-light {
            background: transparent;
            border: 1px solid #C4DAF4;
            color: var(--primary);
        }

        .btn-light:hover {
            background: rgba(62, 134, 245, 0.06);
        }

        /* ---------- Footer ---------- */
        .footer {
            background: var(--bg-footer);
            border-top: 1px solid #d9e8f6;
            padding: 68px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 44px;
        }

        .footer-brand .brand {
            justify-content: flex-start;
            margin-bottom: 16px;
        }

        .footer-desc {
            color: var(--text-color);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
            max-width: 340px;
        }

        .footer-title {
            font-size: 16px;
            color: var(--title-color);
            font-weight: 600;
            margin-bottom: 20px;
        }

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

        .footer-links a {
            color: var(--text-color);
            font-size: 15px;
            transition: all .2s;
        }

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

        .footer-contact p {
            color: var(--text-color);
            margin-bottom: 10px;
            font-size: 15px;
        }

        .footer-contact i {
            width: 22px;
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid #d8e6f5;
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--weak-color);
            font-size: 14px;
        }

        .footer-bottom .legal {
            display: flex;
            gap: 18px;
        }

        /* ---------- float cta ---------- */
        .float-cta {
            display: none;
            position: fixed;
            right: 30px;
            bottom: 30px;
            z-index: 900;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 14px 24px;
            border-radius: 999px;
            box-shadow: 0 12px 30px rgba(62, 134, 245, 0.35);
            gap: 8px;
            align-items: center;
            transition: all .25s;
            font-size: 15px;
        }

        .float-cta.show {
            display: inline-flex;
        }

        .float-cta:hover {
            background: var(--primary-hover);
            transform: translateY(-3px);
        }

        /* ---------- responsive ---------- */
        @media (max-width: 1199px) {
            .header-inner {
                grid-template-columns: 1fr auto 1fr;
                gap: 14px;
                height: 68px;
            }

            .brand {
                font-size: 20px;
            }

            .main-nav ul {
                gap: 18px;
            }

            .hero-grid {
                gap: 32px;
            }

            .pitch-card:nth-child(1),
            .pitch-card:nth-child(2) {
                grid-column: span 3;
            }

            .pitch-card:nth-child(4) {
                grid-column: span 4;
            }

            .bottom-cta {
                margin: 24px 20px 72px;
                padding: 44px 42px;
            }

            .bottom-cta {
                flex-wrap: wrap;
            }

            .pricing-wrapper {
                flex-direction: column;
                align-items: center;
            }

            .price-card {
                width: 100%;
                max-width: 620px;
            }

            .price-card.featured {
                transform: scale(1);
            }

            .price-card.featured:hover {
                transform: translateY(-6px);
            }

            .footer-grid {
                gap: 36px;
            }
        }

        @media (max-width: 991px) {
            .header-inner {
                grid-template-columns: auto 1fr auto;
            }

            .brand {
                justify-self: center;
                font-size: 20px;
            }

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

            .main-nav {
                display: none;
            }

            .mobile-menu {
                display: none;
                padding: 10px 20px 24px;
                border-top: 1px solid var(--line-color);
                background: rgba(255, 255, 255, 0.98);
            }

            .mobile-menu.show {
                display: block;
            }

            .mobile-menu ul {
                display: flex;
                flex-direction: column;
                gap: 4px;
            }

            .mobile-menu li a {
                display: block;
                padding: 14px 10px;
                font-size: 17px;
                color: var(--title-color);
                border-radius: 8px;
                font-weight: 500;
            }

            .mobile-menu li a:hover,
            .mobile-menu li a.active {
                background: rgba(62, 134, 245, 0.08);
                color: var(--primary);
            }

            .mobile-menu .menu-cta {
                margin-top: 18px;
                padding: 14px 10px;
                text-align: center;
                background: var(--primary);
                color: #fff;
                border-radius: 10px;
                font-weight: 600;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-img-card img {
                height: auto;
                min-height: 320px;
            }

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

            .pitch-card:nth-child(1),
            .pitch-card:nth-child(2) {
                grid-column: span 1;
            }

            .pitch-card:nth-child(3) {
                grid-column: span 1;
            }

            .pitch-card:nth-child(4) {
                grid-column: span 2;
            }

            .demo-grid,
            .proof-main {
                grid-template-columns: 1fr;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .bottom-cta {
                margin: 16px 16px 64px;
                padding: 36px 28px;
            }

            .bottom-cta h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 767px) {
            .container,
            .header-inner {
                padding-left: 20px;
                padding-right: 20px;
            }

            .header-inner {
                grid-template-columns: auto 1fr auto;
            }

            .brand {
                font-size: 18px;
            }

            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }

            .brand-tag {
                display: none;
            }

            .home-hero {
                padding: 40px 0 36px;
            }

            .section {
                padding: 58px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .section-head-center .section-desc {
                font-size: 15px;
            }

            .hero-info h1 {
                font-size: 30px;
                line-height: 1.4;
            }

            .hero-float-card {
                left: 12px;
                bottom: 12px;
                padding: 12px 16px;
            }

            .hero-img-card img {
                height: 280px;
                min-height: 0;
            }

            .pitch-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .pitch-card:nth-child(1),
            .pitch-card:nth-child(2),
            .pitch-card:nth-child(3),
            .pitch-card:nth-child(4) {
                grid-column: span 1;
            }

            .demo-grid {
                gap: 24px;
            }

            .demo-step {
                flex-direction: column;
            }

            .step-num {
                width: 42px;
                height: 42px;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .stat-card strong {
                font-size: 26px;
            }

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

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

            .news-card {
                padding: 20px;
            }

            .quote-card blockquote {
                font-size: 16px;
            }

            .pricing-wrapper {
                gap: 18px;
            }

            .price-card,
            .price-card.featured {
                padding: 28px 22px;
                transform: none;
            }

            .price-card.featured:hover {
                transform: translateY(-4px);
            }

            .faq-q {
                padding: 20px 16px;
                font-size: 15px;
            }

            .faq-a {
                padding: 16px;
            }

            .bottom-cta {
                flex-direction: column;
                gap: 20px;
                align-items: flex-start;
            }

            .bottom-cta .cta-btns {
                flex-direction: column;
                width: 100%;
            }

            .bottom-cta .btn {
                width: 100%;
            }

            .float-cta {
                left: 14px;
                right: 14px;
                bottom: 12px;
                justify-content: center;
                border-radius: 14px;
                padding: 16px 10px;
                font-size: 15px;
            }

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

            .footer {
                padding-top: 48px;
            }

            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 420px) {
            .hero-info h1 {
                font-size: 27px;
            }

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

            .hero-buttons .btn {
                width: 100%;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-card {
                padding: 18px 10px;
            }

            .stat-card strong {
                font-size: 23px;
            }

            .news-head h2 {
                font-size: 26px;
            }

            .price-card.featured {
                margin-top: 8px;
            }

            .pitch-card {
                padding: 24px 20px;
            }
        }

/* roulang page: category1 */
:root{
  --primary:#3E86F5;
  --primary-dark:#2C6FE0;
  --primary-deep:#1E57B8;
  --secondary:#17B8C6;
  --accent:#FFAE33;
  --bg:#F7FAFD;
  --bg-white:#FFFFFF;
  --soft-bg:#EAF2FA;
  --heading:#183049;
  --body:#4A617C;
  --muted:#8CA0B7;
  --border:#DDE8F2;
  --divider:#EDF3F8;
  --success:#2FA875;
  --warning:#F26D5F;
  --disabled:#B8C6D9;
  --shadow-sm:0 8px 24px rgba(23,71,128,0.08);
  --shadow-lg:0 14px 36px rgba(23,71,128,0.12);
  --radius:16px;
  --radius-lg:20px;
  --radius-btn:8px;
  --container:1320px;
  --gap:32px;
  --transition:all .25s ease;
}
*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--body);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{
  overflow:hidden;
}
img{
  max-width:100%;
  display:block;
}
a{
  text-decoration:none;
  color:inherit;
  transition:var(--transition);
}
button{
  font-family:inherit;
}
ul,ol{
  list-style:none;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
@media(max-width:767px){
  .container{
    padding:0 20px;
  }
}
.section{
  padding:96px 0;
}
.section-head{
  max-width:760px;
  margin-bottom:56px;
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.section-head h2{
  color:var(--heading);
  font-size:32px;
  line-height:1.35;
  letter-spacing:.5px;
  font-weight:700;
}
.section-head p{
  font-size:16px;
  color:var(--body);
  margin-top:16px;
  line-height:1.85;
}
.text-link{
  color:var(--primary);
  font-weight:500;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.text-link:hover{
  color:var(--primary-dark);
  gap:10px;
}
.lead-icon{
  width:56px;
  height:56px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
  color:#fff;
  background:var(--primary);
}

/* ===== Header ===== */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:1000;
  background:rgba(255,255,255,.98);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--divider);
  height:76px;
  display:flex;
  align-items:center;
  transition:box-shadow .25s ease, background .25s ease;
}
.site-header.scrolled{
  background:rgba(255,255,255,.96);
  box-shadow:0 6px 20px rgba(23,71,128,.04);
}
.header-inner{
  max-width:var(--container);
  width:100%;
  margin:0 auto;
  padding:0 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:relative;
}
.main-nav ul{
  display:flex;
  align-items:center;
  gap:28px;
}
.main-nav a{
  font-size:15px;
  color:var(--body);
  font-weight:500;
  padding:8px 2px;
  position:relative;
  line-height:1.4;
  white-space:nowrap;
}
.main-nav a:after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  width:0;
  height:2px;
  background:var(--primary);
  border-radius:10px;
  transform:translateX(-50%);
  transition:width .25s ease;
}
.main-nav a:hover{
  color:var(--primary);
}
.main-nav a:hover:after{
  width:100%;
}
.main-nav a.active{
  color:var(--primary);
}
.main-nav a.active:after{
  width:100%;
  background:var(--primary);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 28px;
  flex-shrink:0;
}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:19px;
  font-family:Arial,sans-serif;
  box-shadow:0 5px 12px rgba(62,134,245,.3);
}
.brand-text{
  font-size:21px;
  font-weight:700;
  color:var(--heading);
  letter-spacing:.5px;
  white-space:nowrap;
}
.brand-tag{
  background:rgba(255,174,51,.16);
  color:#C98509;
  font-size:11px;
  font-weight:600;
  padding:2px 7px;
  border-radius:999px;
  white-space:nowrap;
  letter-spacing:.3px;
}
.nav-right{
  display:flex;
  align-items:center;
  gap:24px;
}
.nav-btn{
  display:inline-block;
  background:var(--primary);
  color:#fff !important;
  font-size:15px;
  font-weight:600;
  padding:10px 22px;
  border-radius:var(--radius-btn);
  transition:var(--transition);
  white-space:nowrap;
}
.nav-btn:hover{
  background:var(--primary-dark);
  transform:translateY(-2px);
  box-shadow:0 8px 18px rgba(62,134,245,.25);
}
.nav-left{
  display:flex;
}
.mobile-toggle{
  display:none;
  width:42px;
  height:42px;
  border:1px solid var(--border);
  background:#fff;
  border-radius:10px;
  font-size:18px;
  color:var(--heading);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:var(--transition);
}
.mobile-toggle:hover{
  border-color:var(--primary);
  color:var(--primary);
}
.mobile-menu{
  display:none;
  position:fixed;
  top:76px;
  left:0;
  right:0;
  background:#fff;
  border-bottom:1px solid var(--divider);
  box-shadow:0 20px 40px rgba(23,71,128,.08);
  padding:8px 24px 28px;
  z-index:999;
}
.mobile-menu.open{
  display:block;
}
.mobile-menu ul li + li{
  border-top:1px solid var(--divider);
}
.mobile-menu a{
  display:block;
  padding:16px 4px;
  font-size:16px;
  color:var(--body);
  font-weight:500;
}
.mobile-menu a:hover,
.mobile-menu a.active{
  color:var(--primary);
}
.mobile-menu .menu-cta{
  margin-top:16px;
  text-align:center;
  background:var(--primary);
  color:#fff;
  border-radius:var(--radius-btn);
  font-weight:600;
}
.mobile-menu .menu-cta:hover{
  background:var(--primary-dark);
}
@media(max-width:1200px){
  .header-inner{
    padding:0 24px;
  }
}
@media(max-width:992px){
  .site-header{
    height:68px;
  }
  .header-inner{
    justify-content:space-between;
  }
  .main-nav.nav-left,
  .nav-right{
    display:none;
  }
  .mobile-toggle{
    display:inline-flex;
  }
  .brand{
    margin:0;
  }
  .mobile-menu{
    top:68px;
  }
  .header-inner{
    padding:0 20px;
  }
}

/* ===== Breadcrumb ===== */
.breadcrumb{
  padding:96px 0 0;
  background:var(--bg);
}
.breadcrumb-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-size:14px;
  color:var(--muted);
  gap:8px;
}
.breadcrumb-inner a:hover{
  color:var(--primary);
}
.breadcrumb-inner i{
  font-size:12px;
  color:var(--disabled);
}
@media(max-width:992px){
  .breadcrumb{
    padding-top:68px;
  }
}

/* ===== Guide Hero ===== */
.guide-hero{
  background:var(--bg-white);
  padding:80px 0 88px;
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--divider);
}
.guide-hero:before{
  content:"";
  position:absolute;
  width:520px;
  height:520px;
  left:-180px;
  top:-160px;
  background:radial-gradient(circle,rgba(62,134,245,.08),transparent 65%);
  pointer-events:none;
}
.guide-hero-inner{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:64px;
  align-items:center;
}
.guide-hero-tag{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:rgba(23,184,198,.1);
  color:#098C99;
  font-size:14px;
  font-weight:600;
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:26px;
}
.guide-hero h1{
  font-size:clamp(32px,4.6vw,48px);
  line-height:1.2;
  color:var(--heading);
  font-weight:700;
  letter-spacing:.4px;
  margin-bottom:24px;
}
.guide-hero .sub{
  font-size:17px;
  color:var(--body);
  max-width:570px;
  margin-bottom:32px;
  line-height:1.9;
}
.guide-hero-btn{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--primary);
  color:#fff;
  min-height:48px;
  padding:0 28px;
  font-size:16px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid var(--primary);
  cursor:pointer;
  transition:var(--transition);
  gap:8px;
}
.btn-primary:hover{
  background:var(--primary-dark);
  border-color:var(--primary-dark);
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(62,134,245,.28);
  color:#fff;
}
.btn-primary:focus-visible{
  outline:3px solid rgba(62,134,245,.35);
  outline-offset:2px;
}
.btn-primary:active{
  transform:translateY(0);
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 28px;
  border:1px solid #C4DAF4;
  background:transparent;
  color:var(--primary);
  font-size:16px;
  font-weight:600;
  border-radius:var(--radius-btn);
  transition:var(--transition);
  cursor:pointer;
  gap:8px;
}
.btn-ghost:hover{
  background:rgba(62,134,245,.06);
  border-color:var(--primary);
  transform:translateY(-2px);
}
.btn-ghost:active{
  transform:translateY(0);
}
.hero-visual{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  background:var(--soft-bg);
  aspect-ratio:5/4;
}
.hero-visual img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-visual:after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(24,48,73,0) 60%,rgba(24,48,73,.08));
  pointer-events:none;
}
.hero-info-card{
  position:absolute;
  left:16px;
  bottom:16px;
  right:16px;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-radius:14px;
  padding:12px 16px;
  display:flex;
  align-items:center;
  gap:12px;
  box-shadow:var(--shadow-sm);
  font-size:14px;
  color:var(--heading);
}
.hero-info-card i{
  color:var(--primary);
  font-size:18px;
}
@media(max-width:1200px){
  .guide-hero-inner{
    gap:40px;
  }
}
@media(max-width:992px){
  .guide-hero{
    padding:56px 0 64px;
  }
  .guide-hero-inner{
    grid-template-columns:1fr;
  }
  .hero-visual{
    max-width:680px;
    width:100%;
    margin:0 auto;
  }
}

/* ===== Intro cards ===== */
.intro-grid{
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:24px;
}
.intro-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
}
.intro-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(62,134,245,.35);
}
.intro-card:nth-child(2),
.intro-card:nth-child(3){
  margin-right:24px;
}
.intro-card:nth-child(4){
  margin-left:24px;
}
.intro-card .lead-icon{
  background:var(--bg-white);
  color:var(--primary);
  border:1px solid #D7E6F8;
  box-shadow:none;
}
.intro-card:nth-child(2) .lead-icon{
  color:var(--secondary);
  border-color:rgba(23,184,198,.2);
}
.intro-card:nth-child(3) .lead-icon{
  color:#F09B22;
  border-color:rgba(255,174,51,.28);
}
.intro-card:nth-child(4) .lead-icon{
  color:#8A63F0;
  border-color:rgba(138,99,240,.2);
}
.intro-card h3{
  color:var(--heading);
  font-size:20px;
  font-weight:600;
  margin-top:20px;
  margin-bottom:10px;
  line-height:1.4;
}
.intro-card p{
  color:var(--body);
  font-size:15px;
  line-height:1.8;
  margin-bottom:16px;
}
@media(min-width:769px) and (max-width:1199px){
  .intro-grid{
    grid-template-columns:1fr 1fr;
  }
  .intro-card:nth-child(2),
  .intro-card:nth-child(3),
  .intro-card:nth-child(4){
    margin-right:0;
    margin-left:0;
  }
}
@media(max-width:768px){
  .intro-grid{
    grid-template-columns:1fr;
  }
  .intro-card:nth-child(2),
  .intro-card:nth-child(3),
  .intro-card:nth-child(4){
    margin-right:0;
    margin-left:0;
  }
}

/* ===== Steps ===== */
.steps-section{
  background:var(--soft-bg);
  padding:96px 0;
}
.timeline-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  counter-reset:step;
}
.timeline-card{
  position:relative;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 28px 28px;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
  counter-increment:step;
}
.timeline-card:not(:last-child):after{
  content:"";
  position:absolute;
  top:48px;
  right:-12px;
  width:20px;
  height:2px;
  background:#C9DBEF;
  z-index:1;
}
.timeline-card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-4px);
}
.timeline-num{
  display:inline-flex;
  width:44px;
  height:44px;
  border-radius:14px;
  background:rgba(62,134,245,.1);
  color:var(--primary);
  font-weight:700;
  font-size:20px;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
  font-family:Arial,sans-serif;
}
.timeline-card:nth-child(2) .timeline-num{
  background:rgba(23,184,198,.1);
  color:#0FA5B2;
}
.timeline-card:nth-child(3) .timeline-num{
  background:rgba(255,174,51,.14);
  color:#D68A12;
}
.timeline-card:nth-child(4) .timeline-num{
  background:rgba(138,99,240,.1);
  color:#7C54E8;
}
.timeline-card h3{
  font-size:18px;
  color:var(--heading);
  font-weight:600;
  margin-bottom:10px;
}
.timeline-card p{
  font-size:14px;
  color:var(--body);
  line-height:1.8;
}
@media(max-width:1199px){
  .timeline-grid{
    grid-template-columns:repeat(2,1fr);
    row-gap:28px;
    column-gap:20px;
  }
  .timeline-card:not(:last-child):after{
    display:none;
  }
}
@media(max-width:640px){
  .timeline-grid{
    grid-template-columns:1fr;
  }
  .steps-section{
    padding:64px 0;
  }
}

/* ===== Table ===== */
.table-section{
  background:#fff;
  padding:96px 0;
  border-bottom:1px solid var(--divider);
}
.table-wrap{
  overflow-x:auto;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:#fff;
  box-shadow:var(--shadow-sm);
}
.guide-table{
  width:100%;
  border-collapse:collapse;
  min-width:860px;
  font-size:15px;
}
.guide-table th{
  background:var(--soft-bg);
  color:var(--heading);
  font-weight:600;
  text-align:left;
  padding:18px 24px;
  white-space:nowrap;
  border-bottom:1px solid var(--border);
}
.guide-table td{
  padding:20px 24px;
  border-bottom:1px solid var(--divider);
  color:var(--body);
  vertical-align:top;
  line-height:1.8;
}
.guide-table tr:last-child td{
  border-bottom:none;
}
.guide-table tr:hover td{
  background:#F8FBFF;
}
.guide-table .tag-cell{
  display:inline-block;
  background:rgba(23,184,198,.1);
  color:#0FA5B2;
  font-size:13px;
  padding:3px 12px;
  border-radius:999px;
  white-space:nowrap;
}
.guide-table .tag-cell.blue{
  background:rgba(62,134,245,.1);
  color:var(--primary);
}
.guide-table .tag-cell.amber{
  background:rgba(255,174,51,.15);
  color:#D68A12;
}

/* ===== Usage grid ===== */
.usage-section{
  background:var(--bg);
  padding:96px 0;
}
.usage-grid{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:28px;
}
.usage-feature{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
}
.usage-feature:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-3px);
}
.usage-img{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--soft-bg);
}
.usage-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.usage-feature:hover .usage-img img{
  transform:scale(1.03);
}
.usage-body{
  padding:28px 30px 30px;
}
.usage-body h3{
  color:var(--heading);
  font-size:20px;
  font-weight:600;
  margin-bottom:10px;
}
.usage-body p{
  color:var(--body);
  font-size:15px;
  line-height:1.8;
}
.usage-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.usage-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px 26px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
  flex:1;
}
.usage-item:hover{
  border-color:rgba(62,134,245,.4);
  box-shadow:var(--shadow-lg);
}
.usage-item i{
  flex-shrink:0;
  width:44px;
  height:44px;
  border-radius:12px;
  color:#fff;
  background:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
}
.usage-item:nth-child(2) i{
  background:var(--secondary);
}
.usage-item:nth-child(3) i{
  background:var(--accent);
  color:#8A5B06;
}
.usage-item h4{
  color:var(--heading);
  font-size:17px;
  font-weight:600;
  margin-bottom:6px;
}
.usage-item p{
  color:var(--body);
  font-size:14px;
  line-height:1.75;
}
@media(max-width:992px){
  .usage-grid{
    grid-template-columns:1fr;
  }
}

/* ===== CTA ===== */
.cta-band{
  background:linear-gradient(135deg,#E7F1FE 0%,#F3F9FF 100%);
  border-top:1px solid #d9E8FA;
  border-bottom:1px solid #d9E8FA;
  padding:72px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-copy h2{
  color:var(--heading);
  font-size:28px;
  font-weight:700;
  line-height:1.4;
  margin-bottom:8px;
}
.cta-copy p{
  color:var(--body);
  font-size:16px;
  max-width:640px;
}
.cta-btns{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}

/* ===== FAQ ===== */
.faq-section{
  background:#fff;
  padding:96px 0;
}
.faq-list{
  max-width:960px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:border-color .25s ease, box-shadow .25s ease;
  overflow:hidden;
}
.faq-item:hover{
  border-color:#C2D9F5;
  box-shadow:var(--shadow-lg);
}
.faq-item[open]{
  border-color:rgba(62,134,245,.45);
}
.faq-summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 28px;
  font-size:16px;
  font-weight:600;
  color:var(--heading);
  transition:color .2s ease;
  user-select:none;
}
.faq-summary::-webkit-details-marker{
  display:none;
}
.faq-summary:hover{
  color:var(--primary);
}
.faq-icon{
  flex-shrink:0;
  width:30px;
  height:30px;
  border-radius:50%;
  background:rgba(62,134,245,.1);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  transition:transform .25s ease, background .25s ease, color .25s ease;
}
.faq-item[open] .faq-icon{
  transform:rotate(45deg);
  background:var(--primary);
  color:#fff;
}
.faq-answer{
  padding:0 28px 24px;
  color:var(--body);
  font-size:15px;
  line-height:1.9;
  background:#F9FCFF;
  border-top:1px solid var(--divider);
  padding-top:20px;
}
@media(max-width:768px){
  .faq-summary{
    padding:18px 18px;
    font-size:15px;
    line-height:1.55;
  }
  .faq-answer{
    padding:16px 18px 20px;
  }
}

/* ===== Footer ===== */
.footer{
  background:var(--soft-bg);
  padding:72px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:56px;
}
.footer .brand{
  margin:0 0 18px;
}
.footer-brand{
  padding-right:36px;
}
.footer-desc{
  color:var(--body);
  font-size:15px;
  line-height:1.85;
  max-width:380px;
}
.footer-title{
  color:var(--heading);
  font-size:16px;
  font-weight:600;
  margin-bottom:20px;
  line-height:1.4;
}
.footer-links li{
  margin-bottom:13px;
}
.footer-links a{
  color:var(--body);
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:var(--transition);
}
.footer-links a:hover{
  color:var(--primary);
  transform:translateX(3px);
}
.footer-links a:before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--primary);
  opacity:.4;
  display:inline-block;
}
.footer-contact p{
  font-size:14px;
  color:var(--body);
  display:flex;
  align-items:flex-start;
  gap:10px;
  line-height:1.8;
}
.footer-contact p + p{
  margin-top:12px;
}
.footer-contact i{
  color:var(--primary);
  margin-top:3px;
  font-size:15px;
}
.full-footer{
  border-top:1px solid rgba(62,134,245,.1);
  padding-top:0;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:22px 0;
  color:var(--muted);
  font-size:13px;
  flex-wrap:wrap;
}
.footer-bottom .legal{
  display:flex;
  gap:22px;
}
@media(max-width:1199px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media(max-width:640px){
  .footer{
    padding-top:56px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:36px;
  }
  .footer-brand{
    padding-right:0;
  }
  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
  }
}

/* ===== Floating CTA ===== */
.float-cta{
  position:fixed;
  right:28px;
  bottom:28px;
  z-index:900;
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:var(--primary);
  color:#fff;
  font-size:15px;
  font-weight:600;
  padding:13px 22px;
  border-radius:999px;
  box-shadow:0 12px 30px rgba(62,134,245,.4);
  transform:translateY(20px);
  opacity:0;
  pointer-events:none;
  transition:var(--transition);
}
.float-cta.show{
  opacity:1;
  pointer-events:auto;
  transform:translateY(0);
}
.float-cta:hover{
  background:var(--primary-dark);
  color:#fff;
  transform:translateY(-2px);
}
@media(max-width:767px){
  .float-cta{
    left:16px;
    right:16px;
    bottom:14px;
    justify-content:center;
    border-radius:12px;
    text-align:center;
  }
}

/* roulang page: article */
:root {
            --primary: #3E86F5;
            --primary-dark: #2C6FE0;
            --primary-active: #1E57B8;
            --accent-cyan: #17B8C6;
            --accent-amber: #FFAE33;
            --bg-body: #F7FAFD;
            --bg-soft: #F2F7FD;
            --bg-footer: #EAF2FA;
            --heading: #183049;
            --text: #4A617C;
            --text-light: #8CA0B7;
            --border: #DDE8F2;
            --border-light: #E7EFF8;
            --white: #FFFFFF;
            --success: #2FA875;
            --danger: #F26D5F;
            --card-shadow: 0 8px 24px rgba(23, 71, 128, 0.08);
            --card-shadow-hover: 0 14px 36px rgba(23, 71, 128, 0.12);
            --radius-sm: 8px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg-body);
            color: var(--text);
            font-size: 16px;
            line-height: 1.85;
            -webkit-font-smoothing: antialiased;
        }

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

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

        input,
        button,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        button {
            border: none;
            cursor: pointer;
            background: transparent;
        }

        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 44px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom-color: var(--border-light);
            box-shadow: 0 6px 22px rgba(23, 71, 128, 0.05);
        }

        .header-inner {
            position: relative;
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            border-radius: 14px;
            background: linear-gradient(145deg, var(--primary), #1962E8);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 18px rgba(62, 134, 245, 0.24);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--heading);
            letter-spacing: -0.2px;
            white-space: nowrap;
        }

        .brand-tag {
            font-size: 12px;
            line-height: 1;
            border-radius: 999px;
            padding: 4px 10px;
            background: #EAF3FF;
            color: var(--primary);
            font-weight: 600;
            border: 1px solid #C9DFFC;
        }

        .main-nav ul {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .main-nav ul li a {
            position: relative;
            display: inline-block;
            font-size: 16px;
            color: var(--text);
            padding: 10px 2px;
            font-weight: 500;
            transition: color .2s;
        }

        .main-nav ul li a:after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 4px;
            width: 100%;
            max-width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: translateX(-50%) scaleX(0);
            transform-origin: center;
            transition: transform .25s ease;
        }

        .main-nav ul li a:hover {
            color: var(--primary);
        }

        .main-nav ul li a:hover:after,
        .main-nav ul li a.active:after {
            transform: translateX(-50%) scaleX(1);
        }

        .main-nav ul li a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            transition: background .2s, transform .2s, box-shadow .2s;
            box-shadow: 0 6px 14px rgba(62, 134, 245, 0.18);
        }

        .nav-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 22px rgba(62, 134, 245, 0.26);
        }

        .nav-btn:focus-visible {
            outline: 3px solid rgba(62, 134, 245, 0.35);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--heading);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: all .2s;
        }

        .mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            border-top: 1px solid var(--border-light);
            background: #fff;
            padding: 10px 20px 24px;
        }

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

        .mobile-menu ul {
            list-style: none;
            padding: 4px 0;
        }

        .mobile-menu ul li a {
            display: block;
            padding: 14px 8px;
            font-size: 17px;
            color: var(--text);
            border-radius: 12px;
            transition: background .2s, color .2s;
        }

        .mobile-menu ul li a:hover,
        .mobile-menu ul li a.active {
            background: #EFF6FF;
            color: var(--primary);
        }

        .mobile-menu .menu-cta {
            margin-top: 14px;
            text-align: center;
            background: var(--primary);
            color: #fff !important;
            font-weight: 600;
            border-radius: 10px;
        }

        .mobile-menu .menu-cta:hover {
            background: var(--primary-dark);
        }

        .article-hero {
            padding: 64px 0 44px;
            background: #fff;
            position: relative;
            overflow: hidden;
        }

        .article-hero:before {
            content: "";
            position: absolute;
            width: 520px;
            height: 520px;
            right: -140px;
            top: -220px;
            background: radial-gradient(circle, rgba(62, 134, 245, 0.10), rgba(255, 255, 255, 0) 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px 0;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 30px;
            background: #F4F8FC;
            border: 1px solid var(--border-light);
            padding: 11px 18px;
            border-radius: 999px;
            width: fit-content;
            max-width: 100%;
        }

        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
            transition: color .2s;
        }

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

        .breadcrumb i {
            margin: 0 12px;
            color: #C4D5E6;
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text-light);
            max-width: 480px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-hero-main {
            max-width: 1080px;
        }

        .article-hero-main h1 {
            font-size: clamp(28px, 4vw, 42px);
            line-height: 1.3;
            font-weight: 700;
            color: var(--heading);
            letter-spacing: -0.5px;
            margin-bottom: 22px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px 22px;
            color: var(--text-light);
            font-size: 14px;
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta .meta-item i {
            color: var(--primary);
            font-size: 15px;
        }

        .article-cat-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: #E9F6F7;
            color: #0E9FAD;
            font-size: 13px;
            font-weight: 600;
        }

        .article-body-wrap {
            padding: 16px 0 80px;
        }

        .article-card {
            max-width: 920px;
            margin: 0 auto;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            box-shadow: var(--card-shadow);
            padding: 52px 58px 58px;
        }

        .article-content {
            color: var(--text);
            font-size: 16px;
            line-height: 1.9;
        }

        .article-content p {
            margin-bottom: 24px;
            letter-spacing: 0.15px;
        }

        .article-content > p:last-child {
            margin-bottom: 0;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--heading);
            margin: 44px 0 18px;
            line-height: 1.45;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--heading);
            margin: 34px 0 14px;
            line-height: 1.5;
        }

        .article-content img {
            width: 100%;
            height: auto;
            border-radius: 16px;
            margin: 34px auto;
            box-shadow: var(--card-shadow);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: #F2F7FE;
            border-radius: 0 14px 14px 0;
            padding: 20px 26px;
            margin: 32px 0;
            color: var(--heading);
            font-size: 16px;
            line-height: 1.8;
        }

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

        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin: 20px 0 28px;
        }

        .article-content li {
            margin-bottom: 10px;
        }

        .article-content li::marker {
            color: var(--primary);
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(62, 134, 245, 0.3);
            transition: color .2s, border-color .2s;
        }

        .article-content a:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary-dark);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            border-radius: 12px;
            overflow: hidden;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            padding: 13px 18px;
            border: 1px solid var(--border-light);
            text-align: left;
        }

        .article-content th {
            background: #F2F7FC;
            color: var(--heading);
            font-weight: 600;
        }

        .article-tags {
            margin-top: 44px;
            padding-top: 30px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px 14px;
        }

        .tag-item {
            padding: 7px 16px;
            background: #F0F6FD;
            border: 1px solid var(--border-light);
            border-radius: 999px;
            font-size: 13px;
            color: var(--text);
            transition: border-color .2s, color .2s;
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .back-to-list {
            margin-left: auto;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 18px;
            border-radius: 10px;
            transition: background .2s;
        }

        .back-to-list:hover {
            background: #EBF3FF;
        }

        .empty-article {
            background: #fff;
            max-width: 820px;
            margin: 0 auto;
            border: 1px dashed var(--border);
            border-radius: var(--radius-xl);
            padding: 64px 24px;
            text-align: center;
        }

        .empty-article .empty-icon {
            width: 76px;
            height: 76px;
            border-radius: 24px;
            background: #F0F6FE;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            margin-bottom: 18px;
        }

        .empty-article h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 10px;
        }

        .empty-article p {
            color: var(--text-light);
            margin-bottom: 26px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 32px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .25s;
            box-shadow: 0 8px 18px rgba(62, 134, 245, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(62, 134, 245, 0.24);
        }

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

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

        .related-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 28px;
        }

        .related-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 0;
        }

        .related-head .related-sub {
            color: var(--text-light);
            font-size: 15px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .related-card {
            display: block;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: transform .3s, box-shadow .3s, border-color .3s;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-color: #C6DDF8;
        }

        .related-card .card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #E8F2FC;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .related-card:hover .card-img img {
            transform: scale(1.045);
        }

        .related-card .card-body {
            padding: 24px 24px 28px;
        }

        .related-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: color .2s;
        }

        .related-card:hover .card-body h3 {
            color: var(--primary);
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: gap .2s;
        }

        .related-card .card-link i {
            font-size: 12px;
        }

        .related-card:hover .card-link {
            gap: 9px;
        }

        .footer {
            background: var(--bg-footer);
            padding: 68px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 0.8fr 0.8fr 1.2fr;
            gap: 48px;
            padding-bottom: 44px;
        }

        .footer .brand {
            position: static;
            margin-bottom: 18px;
        }

        .footer-desc {
            color: var(--text);
            font-size: 15px;
            line-height: 1.85;
            max-width: 360px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 18px;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: var(--text);
            font-size: 15px;
            transition: color .2s, padding-left .2s;
        }

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

        .footer-contact p {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            color: var(--text);
            font-size: 15px;
        }

        .footer-contact i {
            color: var(--primary);
            margin-top: 5px;
            width: 18px;
            text-align: center;
        }

        .full-footer {
            border-top: 1px solid #DDE8F2;
        }

        .footer-bottom {
            min-height: 62px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px 24px;
            padding: 16px 0;
            color: var(--text-light);
            font-size: 13px;
        }

        .footer-bottom .legal {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .footer-bottom .legal span {
            color: var(--text-light);
        }

        @media (min-width: 993px) and (max-width: 1180px) {
            .nav-left {
                gap: 20px;
            }
            .nav-right {
                gap: 18px;
            }
            .main-nav ul {
                gap: 22px;
            }
            .brand-text {
                font-size: 20px;
            }
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (max-width: 992px) {
            .container {
                padding: 0 24px;
            }
            .header-inner {
                min-height: 66px;
            }
            .site-header .main-nav {
                display: none;
            }
            .site-header .nav-right {
                display: none;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .header-inner .brand {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                margin: 0;
                z-index: 3;
            }
            .mobile-menu {
                display: none;
                box-shadow: 0 20px 30px rgba(23, 71, 128, 0.06);
            }
            .mobile-menu.open {
                display: block;
            }
            .article-hero {
                padding-top: 42px;
            }
            .article-card {
                padding: 40px 34px 44px;
            }
            .article-content {
                font-size: 16px;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 20px;
            }
            .brand-tag {
                display: none;
            }
            .brand-text {
                font-size: 20px;
            }
            .article-hero {
                padding: 28px 0 24px;
            }
            .breadcrumb {
                width: 100%;
                border-radius: 12px;
                padding: 10px 14px;
                margin-bottom: 20px;
                overflow: hidden;
            }
            .breadcrumb .current {
                max-width: 240px;
            }
            .article-hero-main h1 {
                font-size: 26px;
                line-height: 1.4;
            }
            .article-card {
                padding: 26px 20px 30px;
                border-radius: 16px;
            }
            .article-content p {
                margin-bottom: 20px;
            }
            .article-content blockquote {
                padding: 16px 18px;
                margin: 24px 0;
            }
            .article-content table {
                display: block;
                width: 100%;
                overflow-x: auto;
                border: none;
            }
            .article-tags {
                padding-top: 22px;
                margin-top: 30px;
            }
            .back-to-list {
                width: 100%;
                margin-left: 0;
                justify-content: center;
                background: #F0F6FE;
            }
            .related-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                margin-bottom: 20px;
            }
            .related-head h2 {
                font-size: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer {
                padding-top: 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                justify-content: center;
            }
            .footer-bottom .legal {
                flex-direction: column;
                gap: 6px;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .header-inner .brand-mark {
                width: 36px;
                height: 36px;
                font-size: 19px;
            }
            .header-inner .brand-text {
                font-size: 18px;
            }
            .mobile-toggle {
                width: 38px;
                height: 38px;
            }
            .article-card {
                padding: 20px 16px 24px;
            }
            .article-content h2 {
                font-size: 21px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .breadcrumb {
                font-size: 13px;
            }
            .breadcrumb i {
                margin: 0 7px;
            }
        }

/* roulang page: category2 */
:root {
            --blue: #3E86F5;
            --blue-dark: #2C6FE0;
            --blue-deep: #1E57B8;
            --teal: #17B8C6;
            --amber: #FFAE33;
            --ink: #183049;
            --body: #4A617C;
            --muted: #8CA0B7;
            --line: #DDE8F2;
            --line-soft: #EDF3F8;
            --bg: #F7FAFD;
            --white: #FFFFFF;
            --success: #2FA875;
            --warn: #F26D5F;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow: 0 8px 24px rgba(23, 71, 128, 0.08);
            --shadow-hover: 0 14px 36px rgba(23, 71, 128, 0.12);
            --max-width: 1320px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.85;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        body.nav-lock {
            overflow: hidden;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

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

        section[id],
        div[id] {
            scroll-margin-top: 118px;
        }

        .container {
            max-width: var(--max-width);
            margin-inline: auto;
            padding-inline: 48px;
        }

        .section {
            padding: 96px 0;
        }

        .bg-soft {
            background: var(--bg);
        }

        .bg-white {
            background: var(--white);
        }

        .badge-blue {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: 999px;
            background: rgba(62, 134, 245, 0.1);
            color: var(--blue-dark);
            font-size: 14px;
            font-weight: 600;
            line-height: 1.2;
        }

        .badge-amber {
            background: rgba(255, 174, 51, 0.18);
            color: #9A6700;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 34px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            line-height: 1.2;
            transition: all 0.22s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn i {
            margin-right: 8px;
            font-size: 15px;
        }

        .btn-primary {
            background: var(--blue);
            color: var(--white);
            box-shadow: 0 6px 18px rgba(62, 134, 245, 0.22);
        }

        .btn-primary:hover {
            background: var(--blue-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(62, 134, 245, 0.28);
            color: #fff;
        }

        .btn-primary:focus-visible,
        .btn-outline:focus-visible,
        .btn-white:focus-visible {
            outline: 3px solid rgba(62, 134, 245, 0.35);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            background: var(--blue-deep);
        }

        .btn-outline {
            background: var(--white);
            color: var(--blue-dark);
            border-color: #C4DAF4;
        }

        .btn-outline:hover {
            background: rgba(62, 134, 245, 0.06);
            border-color: var(--blue);
            color: var(--blue-dark);
            transform: translateY(-2px);
        }

        .btn-white {
            background: #fff;
            color: var(--blue-deep);
        }

        .btn-white:hover {
            background: #f2f7ff;
            color: var(--blue-dark);
            transform: translateY(-2px);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--blue-dark);
            font-weight: 600;
            transition: color 0.2s;
        }

        .text-link:hover {
            color: var(--blue-deep);
        }

        .text-link i {
            transition: transform 0.2s;
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid rgba(221, 232, 242, 0.88);
            transition: box-shadow 0.25s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 20px rgba(23, 71, 128, 0.07);
        }

        .header-inner {
            position: relative;
            max-width: 1440px;
            margin-inline: auto;
            padding-inline: 48px;
            min-height: 76px;
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            column-gap: 24px;
        }

        .main-nav {
            display: flex;
            align-items: center;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 34px;
        }

        .main-nav ul li a {
            font-size: 16px;
            font-weight: 500;
            color: var(--body);
            padding: 10px 2px;
            position: relative;
            transition: color 0.22s;
            display: inline-block;
        }

        .main-nav ul li a::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            right: 50%;
            height: 2px;
            border-radius: 4px;
            background: var(--blue);
            transition: left 0.24s ease, right 0.24s ease;
        }

        .main-nav ul li a:hover {
            color: var(--blue);
        }

        .main-nav ul li a:hover::after {
            left: 0;
            right: 0;
        }

        .main-nav ul li a.active {
            color: var(--blue);
            font-weight: 600;
        }

        .main-nav ul li a.active::after {
            left: 0;
            right: 0;
        }

        .nav-left {
            justify-self: start;
        }

        .nav-right {
            justify-self: end;
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-right .main-nav ul {
            gap: 28px;
        }

        .nav-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 42px;
            padding: 0 24px;
            border-radius: 8px;
            background: var(--blue);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 12px rgba(62, 134, 245, 0.2);
        }

        .nav-btn:hover {
            background: var(--blue-dark);
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 8px 18px rgba(62, 134, 245, 0.24);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            justify-self: center;
            color: var(--ink);
        }

        .brand-mark {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--blue);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 9px;
            line-height: 1;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.01em;
            color: var(--ink);
            white-space: nowrap;
        }

        .brand-tag {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 600;
            color: var(--blue-deep);
            background: rgba(62, 134, 245, 0.12);
            border-radius: 999px;
            padding: 3px 8px;
            line-height: 1;
            white-space: nowrap;
        }

        .mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: #F2F7FF;
            color: var(--ink);
            font-size: 18px;
            cursor: pointer;
            transition: background 0.2s, color 0.2s;
        }

        .mobile-toggle:hover {
            background: #e5effc;
            color: var(--blue);
        }

        .mobile-menu {
            display: none;
            background: var(--white);
            border-top: 1px solid var(--line-soft);
            padding: 18px 24px 30px;
            box-shadow: 0 14px 24px rgba(23, 71, 128, 0.08);
        }

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

        .mobile-menu ul {
            display: flex;
            flex-direction: column;
        }

        .mobile-menu ul li {
            border-bottom: 1px solid var(--line-soft);
        }

        .mobile-menu ul li:last-child {
            border-bottom: 0;
        }

        .mobile-menu ul li a {
            display: block;
            padding: 16px 8px;
            font-size: 17px;
            font-weight: 500;
            color: var(--body);
            transition: color 0.2s;
        }

        .mobile-menu ul li a.active {
            color: var(--blue);
            font-weight: 600;
        }

        .mobile-menu .menu-cta {
            margin-top: 16px;
            text-align: center;
            background: var(--blue);
            color: #fff !important;
            padding: 14px 16px;
            border-radius: 8px;
            font-weight: 600;
            transition: background 0.2s;
        }

        .mobile-menu .menu-cta:hover {
            background: var(--blue-dark);
        }

        @media (max-width: 1199px) {
            .header-inner {
                padding-inline: 32px;
            }

            .main-nav ul {
                gap: 22px;
            }

            .nav-right {
                gap: 22px;
            }
        }

        @media (max-width: 992px) {
            .header-inner {
                min-height: 66px;
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding-inline: 20px;
            }

            .site-header {
                background: rgba(255, 255, 255, 0.98);
            }

            .main-nav,
            .nav-right {
                display: none;
            }

            .brand {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                justify-self: auto;
            }

            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 16px;
                border-radius: 8px;
            }

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

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

        /* ===== Breadcrumb ===== */
        .breadcrumb-line {
            padding-top: 28px;
        }

        .breadcrumb-line nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--muted);
        }

        .breadcrumb-line nav a {
            color: var(--muted);
            transition: color 0.2s;
        }

        .breadcrumb-line nav a:hover {
            color: var(--blue);
        }

        .breadcrumb-line nav span {
            color: #b5c7dc;
        }

        .breadcrumb-line nav .current {
            color: var(--body);
            font-weight: 500;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            background:
                radial-gradient(circle at 82% 18%, rgba(62, 134, 245, 0.10), transparent 320px),
                linear-gradient(180deg, #F2F8FF 0%, #FFFFFF 74%);
            border-bottom: 1px solid var(--line-soft);
            overflow: hidden;
            padding: 24px 0 64px;
        }

        .cat-hero-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 60px;
            align-items: center;
            padding-top: 44px;
        }

        .cat-eyebrow {
            margin-bottom: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .cat-hero h1 {
            font-size: clamp(30px, 4.4vw, 48px);
            font-weight: 700;
            color: var(--ink);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .cat-hero h1 span {
            color: var(--blue);
        }

        .cat-hero-desc {
            font-size: 17px;
            color: var(--body);
            max-width: 600px;
            margin-bottom: 32px;
        }

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

        .cat-hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid #E7EFF8;
            transform: rotate(0deg);
            transition: box-shadow 0.3s;
        }

        .cat-hero-visual::before {
            content: "九游j9网页版";
            position: absolute;
            left: 18px;
            top: 18px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            color: var(--ink);
            font-weight: 600;
            font-size: 13px;
            padding: 7px 13px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
            box-shadow: 0 4px 14px rgba(23, 71, 128, 0.08);
        }

        .cat-hero-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .hero-visual-note {
            position: absolute;
            right: 18px;
            bottom: 18px;
            z-index: 2;
            background: rgba(23, 48, 73, 0.78);
            color: #fff;
            font-size: 13px;
            padding: 8px 14px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }

        .cat-hero-links {
            margin-top: 34px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px 22px;
        }

        .cat-hero-links a {
            color: var(--blue-dark);
            font-weight: 500;
            font-size: 14px;
            border-bottom: 1px dashed #a9c7ed;
            transition: border-color 0.2s, color 0.2s;
        }

        .cat-hero-links a:hover {
            color: var(--blue-deep);
            border-bottom-style: solid;
        }

        @media (max-width: 1199px) {
            .cat-hero-grid {
                gap: 40px;
            }

            .cat-hero-visual img {
                height: 360px;
            }
        }

        @media (max-width: 992px) {
            .cat-hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
                padding-top: 24px;
            }

            .cat-hero h1 {
                font-size: 34px;
            }

            .cat-hero-visual img {
                height: auto;
                max-height: 360px;
            }
        }

        @media (max-width: 640px) {
            .cat-hero {
                padding-top: 0;
            }

            .breadcrumb-line {
                padding-top: 10px;
            }

            .cat-hero-grid {
                padding-top: 24px;
            }

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

            .cat-hero-visual img {
                height: 230px;
            }

            .hero-btns .btn {
                width: 100%;
            }
        }

        /* ===== Section header ===== */
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 38px;
        }

        .section-kicker {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--teal);
            letter-spacing: 0.06em;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.35;
            letter-spacing: -0.01em;
        }

        .section-head p {
            color: var(--body);
            font-size: 16px;
            max-width: 560px;
        }

        @media (max-width: 640px) {
            .section-head h2 {
                font-size: 26px;
            }
        }

        /* ===== Focus Card ===== */
        .focus-section {
            background: var(--white);
            padding: 96px 0;
        }

        .focus-card {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            background: var(--white);
            border: 1px solid #E7EFF8;
            border-radius: 22px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow 0.3s;
        }

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

        .focus-media {
            position: relative;
            min-height: 340px;
            overflow: hidden;
        }

        .focus-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .focus-card:hover .focus-media img {
            transform: scale(1.02);
        }

        .focus-content {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: flex-start;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(23, 184, 198, 0.12);
            color: #0C9AA8;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(23, 184, 198, 0.14);
            white-space: nowrap;
        }

        .tag.blue {
            background: rgba(62, 134, 245, 0.12);
            color: var(--blue-dark);
            border-color: rgba(62, 134, 245, 0.14);
        }

        .tag.amber {
            background: rgba(255, 174, 51, 0.16);
            color: #9A6700;
            border-color: rgba(255, 174, 51, 0.18);
        }

        .card-meta time {
            color: var(--muted);
            font-size: 13px;
        }

        .focus-content h3 {
            font-size: 25px;
            line-height: 1.55;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .focus-content p {
            color: var(--body);
            margin-bottom: 22px;
            max-width: 560px;
        }

        @media (max-width: 992px) {
            .focus-card {
                grid-template-columns: 1fr;
            }

            .focus-media {
                min-height: 260px;
            }

            .focus-content {
                padding: 28px;
            }
        }

        @media (max-width: 640px) {
            .focus-content h3 {
                font-size: 21px;
            }

            .focus-media {
                min-height: 200px;
            }
        }

        /* ===== News summary cards ===== */
        .summary-section {
            background: var(--bg);
            padding: 96px 0;
        }

        .summary-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 24px;
        }

        .summary-card {
            background: var(--white);
            border: 1px solid #E7EFF8;
            border-radius: var(--radius);
            padding: 28px 30px;
            display: flex;
            flex-direction: column;
            box-shadow: 0 4px 12px rgba(23, 71, 128, 0.04);
            transition: box-shadow 0.28s ease, transform 0.28s ease, border-color 0.28s;
        }

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

        .summary-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .summary-top time {
            color: var(--muted);
            font-size: 13px;
        }

        .summary-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.65;
            margin-bottom: 10px;
            transition: color 0.2s;
        }

        .summary-card:hover h3 {
            color: var(--blue-dark);
        }

        .summary-card p {
            color: var(--body);
            font-size: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .summary-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--blue-dark);
            font-size: 14px;
            font-weight: 600;
            margin-top: auto;
        }

        .summary-link i {
            transition: transform 0.2s;
        }

        .summary-link:hover {
            color: var(--blue-deep);
        }

        .summary-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 892px) {
            .summary-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .summary-section {
                padding: 72px 0;
            }

            .summary-card {
                padding: 24px;
            }
        }

        /* ===== Overview / value split ===== */
        .overview-section {
            background: var(--white);
            padding: 96px 0;
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 72px;
            align-items: center;
        }

        .overview-copy {
            padding-right: 16px;
        }

        .overview-copy h2 {
            font-size: 32px;
            line-height: 1.4;
            margin-bottom: 20px;
            color: var(--ink);
        }

        .overview-copy p {
            color: var(--body);
            margin-bottom: 24px;
        }

        .overview-copy .note-line {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            background: rgba(23, 184, 198, 0.08);
            border-left: 3px solid var(--teal);
            padding: 18px 20px;
            border-radius: 12px;
            color: var(--body);
        }

        .overview-copy .note-line i {
            color: var(--teal);
            margin-top: 5px;
        }

        .mini-panel-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .mini-panel {
            background: var(--bg);
            border: 1px solid #EAF1F9;
            border-radius: 18px;
            padding: 24px 26px;
            display: grid;
            grid-template-columns: 46px 1fr;
            gap: 16px;
            align-items: flex-start;
            transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
        }

        .mini-panel:hover {
            border-color: #BDD8F5;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .mini-panel-icon {
            width: 44px;
            height: 44px;
            background: #EAF3FF;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--blue);
            font-size: 20px;
        }

        .mini-panel h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .mini-panel p {
            color: var(--body);
            font-size: 15px;
            line-height: 1.8;
        }

        @media (max-width: 992px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .overview-copy {
                padding-right: 0;
            }
        }

        @media (max-width: 640px) {
            .overview-section {
                padding: 72px 0;
            }

            .overview-copy h2 {
                font-size: 26px;
            }

            .mini-panel {
                padding: 20px;
            }
        }

        /* ===== Timeline ===== */
        .timeline-section {
            background: var(--bg);
            padding: 96px 0;
        }

        .timeline-board {
            background: var(--white);
            border: 1px solid #E7EFF8;
            border-radius: 22px;
            padding: 44px;
            box-shadow: var(--shadow);
        }

        .timeline-head {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .timeline-head h2 {
            font-size: 29px;
            color: var(--ink);
            font-weight: 700;
        }

        .timeline-head p {
            color: var(--body);
            max-width: 560px;
        }

        .timeline-head .head-chip {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(62, 134, 245, 0.1);
            color: var(--blue-deep);
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: 999px;
        }

        .timeline-list {
            position: relative;
            padding-left: 6px;
        }

        .timeline-item {
            position: relative;
            border-left: 2px solid #D8E7F8;
            padding: 4px 0 34px 38px;
        }

        .timeline-item:last-child {
            border-left: 2px solid transparent;
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -9px;
            top: 10px;
            width: 16px;
            height: 16px;
            background: var(--blue);
            border: 4px solid #EAF3FF;
            border-radius: 50%;
            box-shadow: 0 0 0 1px #BDD8F5;
        }

        .timeline-item .tl-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .timeline-item .tl-time {
            font-size: 13px;
            color: var(--muted);
            letter-spacing: 0.03em;
        }

        .timeline-item h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .timeline-item p {
            color: var(--body);
            max-width: 860px;
        }

        @media (max-width: 640px) {
            .timeline-section {
                padding: 72px 0;
            }

            .timeline-board {
                padding: 26px 22px;
            }

            .timeline-item {
                padding: 2px 0 28px 24px;
            }

            .timeline-item h3 {
                font-size: 17px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--white);
            padding: 96px 0;
        }

        .faq-inner {
            max-width: 960px;
            margin-inline: auto;
        }

        .faq-section .section-head {
            justify-content: center;
            text-align: center;
            margin-bottom: 42px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid #E7EFF8;
            border-radius: 16px;
            box-shadow: 0 4px 14px rgba(23, 71, 128, 0.04);
            overflow: hidden;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-item.active,
        .faq-item:hover {
            border-color: var(--blue);
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            text-align: left;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            cursor: pointer;
            transition: background 0.2s;
        }

        .faq-question:hover {
            background: #F9FCFF;
        }

        .faq-question i {
            font-size: 15px;
            color: var(--blue);
            transition: transform 0.25s;
            flex-shrink: 0;
            margin-left: auto;
        }

        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 6px 28px 24px;
            background: rgba(62, 134, 245, 0.024);
            border-top: 1px solid rgba(62, 134, 245, 0.1);
            color: var(--body);
            line-height: 1.9;
            font-size: 15px;
        }

        @media (max-width: 640px) {
            .faq-section {
                padding: 72px 0;
            }

            .faq-question {
                padding: 18px 20px;
            }

            .faq-answer-inner {
                padding: 4px 20px 20px;
            }
        }

        /* ===== Bottom CTA ===== */
        .cta-section {
            background: var(--bg);
            padding: 96px 0;
        }

        .cta-panel {
            background:
                radial-gradient(circle at 85% 10%, rgba(62, 134, 245, 0.09), transparent 280px),
                #EAF4FF;
            border: 1px solid #D2E5FA;
            border-radius: 24px;
            padding: 54px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-copy h2 {
            font-size: 28px;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-copy p {
            color: var(--body);
            max-width: 660px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            flex-shrink: 0;
        }

        @media (max-width: 992px) {
            .cta-panel {
                padding: 38px;
            }
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 72px 0;
            }

            .cta-panel {
                padding: 28px 22px;
                flex-direction: column;
                align-items: stretch;
            }

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

        /* ===== Footer ===== */
        .footer {
            background: #EAF2FA;
            padding-top: 64px;
            border-top: 1px solid #DCE8F3;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
            gap: 48px;
            padding-bottom: 42px;
        }

        .footer .brand {
            justify-self: start;
            margin-bottom: 14px;
        }

        .footer-desc {
            color: var(--body);
            font-size: 14px;
            line-height: 1.9;
            max-width: 330px;
            margin-top: 14px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: var(--body);
            font-size: 14px;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color 0.2s, transform 0.2s;
        }

        .footer-links a i {
            font-size: 12px;
            color: #A9BFD8;
            transition: transform 0.2s;
        }

        .footer-links a:hover {
            color: var(--blue-dark);
            transform: translateX(3px);
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .footer-contact p {
            color: var(--body);
            font-size: 14px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.7;
        }

        .footer-contact i {
            color: var(--blue);
            margin-top: 4px;
        }

        .full-footer {
            border-top: 1px solid #D7E4F2;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 18px 0 20px;
            color: var(--muted);
            font-size: 13px;
        }

        .footer-bottom .legal {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        @media (max-width: 1100px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 640px) {
            .footer {
                padding-top: 44px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 24px;
            }

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

        /* ===== Floating CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 38px;
            right: 38px;
            z-index: 90;
            opacity: 0;
            visibility: hidden;
            transform: translateY(18px);
            transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
        }

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

        .float-cta a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            height: 54px;
            background: var(--blue);
            color: #fff;
            padding: 0 26px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 10px 24px rgba(62, 134, 245, 0.26);
            transition: background 0.2s, transform 0.2s;
        }

        .float-cta a:hover {
            background: var(--blue-dark);
            transform: translateY(-3px);
            color: #fff;
        }

        @media (max-width: 640px) {
            .float-cta {
                left: 16px;
                right: 16px;
                bottom: 14px;
            }

            .float-cta a {
                width: 100%;
                justify-content: center;
                height: 50px;
            }
        }

        /* ===== responsive container ===== */
        @media (max-width: 768px) {
            .container {
                padding-inline: 24px;
            }
        }

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