/* roulang page: index */
:root {
            --primary: #1B6FD9;
            --primary-strong: #0F4FA8;
            --primary-soft: #E7F0FA;
            --accent: #D98E32;
            --accent-2: #14B8A6;
            --bg: #F6F8FB;
            --surface: #FFFFFF;
            --text-primary: #1A2733;
            --text-secondary: #5B6B7B;
            --line: #D9E1EA;
            --deep-bg: #081226;
            --deep-card: rgba(255, 255, 255, 0.04);
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(26, 39, 51, 0.05);
            --shadow-md: 0 10px 30px rgba(26, 39, 51, 0.08);
            --shadow-deep: 0 18px 40px rgba(3, 10, 24, 0.45);
            --font-main: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --aside-w: 248px;
            --top-h: 60px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-strong);
        }
        a:focus-visible,
        button:focus-visible,
        .kai-btn:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(27, 111, 217, 0.25);
            outline-offset: 2px;
        }
        p {
            margin: 0 0 1rem;
        }
        h1,
        h2,
        h3,
        h4 {
            margin: 0;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

        .kai-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .section-pad {
            padding: 80px 0;
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-head .sec-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-soft);
            color: var(--primary-strong);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 2vw, 2.25rem);
            color: var(--text-primary);
        }
        .section-head .sec-desc {
            color: var(--text-secondary);
            max-width: 620px;
            font-size: 15px;
            margin-top: 12px;
        }

        .kai-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0.875rem 1.75rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all 0.2s ease;
            background: var(--primary);
            color: #fff;
            min-height: 46px;
            line-height: 1.4;
        }
        .kai-btn:hover {
            background: var(--primary-strong);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(27, 111, 217, 0.18);
        }
        .kai-btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .kai-btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-strong);
            border-color: var(--primary-strong);
        }
        .kai-btn-light {
            background: #fff;
            color: var(--primary-strong);
        }
        .kai-btn-light:hover {
            background: var(--primary-soft);
            color: var(--primary-strong);
        }
        .kai-btn-block {
            width: 100%;
        }

        /* 左侧 App Shell */
        .kai-site {
            min-height: 100vh;
        }
        .kai-aside {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--aside-w);
            background: #fff;
            border-right: 1px solid var(--line);
            display: flex;
            flex-direction: column;
            z-index: 999;
            padding: 0;
        }
        .aside-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 24px 20px;
            border-bottom: 1px solid #EEF2F5;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #1B6FD9 0%, #2E9BFF 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 6px 16px rgba(27, 111, 217, 0.3);
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            letter-spacing: .2px;
        }
        .brand-sub {
            font-size: 12px;
            color: var(--text-secondary);
            display: block;
            margin-top: 2px;
        }
        .kai-aside nav {
            padding: 20px 14px;
            flex: 1;
            overflow-y: auto;
        }
        .nav-group {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            width: 100%;
            padding: 11px 14px;
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 500;
            border: 0;
            background: transparent;
            cursor: pointer;
            transition: background .2s, color .2s;
            min-height: 44px;
            text-align: left;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            color: inherit;
            opacity: .8;
        }
        .nav-item:hover {
            background: rgba(27, 111, 217, 0.06);
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary-soft);
            color: var(--primary-strong);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
        }
        .aside-tag {
            margin: 26px 14px 10px;
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }
        .aside-foot {
            padding: 20px 26px 24px;
            border-top: 1px solid #EEF2F5;
            font-size: 12px;
            color: #8E9DAD;
        }

        /* 主内容区 */
        .kai-content {
            margin-left: var(--aside-w);
            min-height: 100vh;
            background: var(--bg);
        }

        /* 移动端顶栏和抽屉 */
        .ky-topbar {
            display: none;
            height: var(--top-h);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--line);
            z-index: 1001;
            padding: 0 18px;
            align-items: center;
            justify-content: space-between;
        }
        .ky-hamburger {
            width: 40px;
            height: 40px;
            border: 0;
            background: transparent;
            border-radius: 10px;
            font-size: 18px;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .ky-topbar .top-brand {
            font-size: 17px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .drawer-mask {
            position: fixed;
            inset: 0;
            background: rgba(10, 20, 35, 0.45);
            z-index: 1200;
            opacity: 0;
            visibility: hidden;
            transition: opacity .2s ease;
        }
        .drawer-mask.open {
            opacity: 1;
            visibility: visible;
        }
        .ky-drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 290px;
            background: #fff;
            z-index: 1201;
            transform: translateX(-100%);
            transition: transform 0.2s ease;
            padding: 0;
            display: flex;
            flex-direction: column;
        }
        .ky-drawer.open {
            transform: translateX(0);
        }
        .drawer-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 18px 14px;
            border-bottom: 1px solid #EEF2F5;
        }
        .drawer-close {
            width: 44px;
            height: 44px;
            border: 0;
            background: transparent;
            font-size: 18px;
            color: var(--text-primary);
            cursor: pointer;
            border-radius: 10px;
        }
        .drawer-nav {
            padding: 16px 14px;
            flex: 1;
            overflow-y: auto;
        }
        .drawer-nav .nav-item {
            width: 100%;
        }

        /* Hero */
        .ky-hero {
            position: relative;
            background: var(--deep-bg);
            color: #fff;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
        }
        .ky-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: .18;
        }
        .ky-hero::after {
            content: "";
            position: absolute;
            top: -20%;
            right: -5%;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(47, 155, 255, 0.4) 0%, rgba(20, 184, 166, 0.2) 40%, transparent 70%);
            filter: blur(40px);
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 84px 0 100px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: #B9E0FF;
            background: rgba(27, 111, 217, 0.18);
            padding: 7px 14px;
            border-radius: 999px;
            border: 1px solid rgba(120, 180, 255, .25);
            margin-bottom: 26px;
        }
        .hero-badge i {
            color: #4AD2C0;
        }
        .ky-hero h1 {
            font-size: clamp(2.25rem, 4vw, 3.4rem);
            line-height: 1.2;
            color: #fff;
            max-width: 720px;
            letter-spacing: .2px;
        }
        .hero-sub {
            font-size: 17px;
            color: rgba(228, 236, 250, 0.88);
            max-width: 540px;
            margin: 24px 0 8px;
            line-height: 1.8;
        }
        .hero-feature-line {
            color: rgba(190, 215, 245, 0.8);
            font-size: 14px;
            margin: 4px 0 0;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 14px;
        }
        .hero-feature-line span i {
            color: #4AD2C0;
            margin-right: 5px;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 38px;
            align-items: center;
        }
        .hero-cta .kai-btn {
            min-width: 150px;
        }
        .hero-note {
            width: 100%;
            font-size: 12px;
            color: rgba(190, 215, 245, .6);
            margin-top: 12px;
            display: block;
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            margin-top: 60px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            max-width: 640px;
        }
        .hero-stat h3 {
            font-size: 24px;
            color: #fff;
            font-variant-numeric: tabular-nums;
        }
        .hero-stat h3 span {
            color: #4AD2C0;
            margin-left: 3px;
        }
        .hero-stat p {
            color: rgba(190, 215, 245, .65);
            font-size: 13px;
            margin: 0;
        }

        /* 痛点区 */
        .pain-section {
            padding: 56px 0 40px;
            border-bottom: 1px solid var(--line);
        }
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px 48px;
        }
        .pain-item {
            padding: 14px 0;
            border-bottom: 1px dashed #D9E1EA;
        }
        .pain-item:last-child {
            border-bottom: 0;
        }
        .pain-item p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .pain-item p::before {
            content: "“";
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            margin-right: 4px;
        }
        .pain-item p::after {
            content: "”";
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            margin-left: 4px;
        }
        .pain-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-strong);
            background: var(--primary-soft);
            padding: 4px 12px;
            border-radius: 6px;
            margin-bottom: 8px;
        }

        /* 方案卡片 2x2 */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .solution-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow .2s ease, transform .2s ease;
        }
        .solution-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .sol-card-top {
            position: relative;
            height: 180px;
            overflow: hidden;
        }
        .sol-card-top img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .35s ease;
        }
        .solution-card:hover .sol-card-top img {
            transform: scale(1.03);
        }
        .sol-card-top::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 50px;
            background: linear-gradient( transparent 0%, rgba(26, 39, 51, .35) 100%);
        }
        .sol-idx {
            position: absolute;
            left: 16px;
            top: 14px;
            z-index: 2;
            background: rgba(15, 20, 35, .58);
            color: #C7E7FF;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(6px);
        }
        .sol-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .sol-body h3 {
            font-size: 1.3rem;
            margin: 0 0 10px;
        }
        .sol-body .sol-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 16px;
            line-height: 1.75;
            flex: 1;
        }
        .sol-feats {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 0 0 18px;
        }
        .sol-feat {
            font-size: 12px;
            background: var(--primary-soft);
            color: var(--primary-strong);
            border-radius: 6px;
            padding: 3px 9px;
            font-weight: 600;
        }
        .sol-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .sol-link:hover {
            gap: 12px;
            color: var(--primary-strong);
        }
        .sol-link i {
            transition: transform .2s;
            font-size: 13px;
        }
        .sol-link:hover i {
            transform: translateX(3px);
        }

        /* 深色流程数据带 */
        .process-section {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat, linear-gradient(112deg, #0B1B33 0%, #0E2847 55%, #133B56 100%);
            color: #fff;
            position: relative;
        }
        .process-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(8, 18, 38, .55);
        }
        .process-inner {
            position: relative;
            z-index: 2;
        }
        .process-section .section-head h2 {
            color: #fff;
        }
        .process-section .section-head .sec-desc {
            color: rgba(220, 233, 248, .78);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }
        .process-step {
            padding: 28px 20px 24px;
            border-radius: var(--radius-md);
            background: var(--deep-card);
            border: 1px solid rgba(255, 255, 255, .06);
            position: relative;
        }
        .process-step::after {
            content: "\f061";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            right: -12px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(128, 200, 255, .4);
            z-index: 3;
        }
        .process-step:last-child::after {
            display: none;
        }
        .step-no {
            font-size: 12px;
            letter-spacing: 1px;
            color: #70BDFF;
            font-weight: 700;
            display: block;
            margin-bottom: 10px;
        }
        .process-step h3 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: rgba(220, 233, 248, .7);
            line-height: 1.7;
            margin: 0;
        }
        .achieve-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            padding-top: 34px;
            border-top: 1px solid rgba(255, 255, 255, .1);
        }
        .achieve-item {
            text-align: center;
            padding: 0 12px;
        }
        .achieve-item .num {
            font-size: clamp(1.4rem, 2vw, 2rem);
            color: #4AD2C0;
            font-variant-numeric: tabular-nums;
            font-weight: 800;
            letter-spacing: .3px;
        }
        .achieve-item p {
            color: rgba(220, 233, 248, .6);
            font-size: 13px;
            margin: 6px 0 0;
        }

        /* 资讯列表 */
        .news-section {
            background: var(--bg);
        }
        .news-layout {
            max-width: 980px;
        }
        .news-note {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0 0 22px;
            background: #EFF5FC;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid #D5EAF2;
        }
        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            background: var(--surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 26px 28px;
            display: flex;
            gap: 22px;
            flex-direction: row;
            align-items: flex-start;
            transition: box-shadow .2s, transform .2s;
            border: 1px solid transparent;
            min-height: 150px;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .news-item-inner {
            flex: 1;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .news-cat {
            background: var(--primary-soft);
            color: var(--primary-strong);
            border-radius: 6px;
            padding: 3px 9px;
            font-size: 12px;
            font-weight: 600;
        }
        .news-date i {
            margin-right: 4px;
            font-size: 12px;
        }
        .news-title {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.45;
            margin: 0 0 10px;
        }
        .news-title a {
            color: var(--text-primary);
        }
        .news-title a:hover {
            color: var(--primary);
        }
        .news-summary {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-link {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
        }
        .news-empty {
            border: 2px dashed var(--line);
            border-radius: var(--radius-md);
            padding: 50px 30px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 15px;
            background: rgba(255, 255, 255, 0.5);
            transition: all .2s;
        }
        .news-empty i {
            font-size: 28px;
            color: #A0B3C4;
            display: block;
            margin-bottom: 13px;
        }

        /* CTA 横条 */
        .cta-strip {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-lg);
            padding: 62px 50px;
            position: relative;
            overflow: hidden;
        }
        .cta-strip::after {
            content: "";
            position: absolute;
            right: -5%;
            top: -50%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, .1);
            border-radius: 50%;
        }
        .cta-strip .cta-content {
            position: relative;
            z-index: 2;
            display: flex;
            justify-content: space-between;
            gap: 30px;
            align-items: center;
            flex-wrap: wrap;
        }
        .cta-strip h2 {
            color: #fff;
            font-size: clamp(1.6rem, 2.3vw, 2.3rem);
            max-width: 600px;
        }
        .cta-strip p {
            color: rgba(255, 255, 255, 0.85);
            margin: 8px 0 0;
            font-size: 15px;
            max-width: 520px;
        }
        .cta-strip .kai-btn {
            background: #fff;
            color: var(--primary-strong);
        }
        .cta-strip .kai-btn:hover {
            background: var(--primary-soft);
        }

        /* FAQ */
        .faq-wrap {
            max-width: 900px;
            margin: 0 auto;
        }
        .kai-accordion {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .accord-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 14px;
            overflow: hidden;
            transition: border .2s;
        }
        .accord-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 18px rgba(27, 111, 217, .06);
        }
        .accord-q {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            justify-content: space-between;
            min-height: 60px;
            padding: 15px 20px 15px 24px;
            background: transparent;
            border: 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            font-family: var(--font-main);
            text-align: left;
        }
        .accord-q .arrow {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 8px;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .25s;
        }
        .accord-item.active .accord-q .arrow {
            background: var(--primary);
            color: #fff;
            transform: rotate(90deg);
        }
        .accord-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .25s ease;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }
        .accord-a-inner {
            padding: 0 24px 20px;
            line-height: 1.8;
            border-top: 1px dashed #E2E9F0;
            font-size: 15px;
            color: var(--text-secondary);
            padding-top: 14px;
        }

        /* 表单弹窗 */
        .kai-reveal {
            max-width: 560px;
            border-radius: 18px;
            border: 0;
            padding: 0;
            box-shadow: 0 24px 80px rgba(10, 20, 40, .3);
            background: #fff;
        }
        .reveal-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 28px 32px 14px;
        }
        .reveal-head h3 {
            font-size: 22px;
            color: var(--text-primary);
        }
        .reveal-close {
            width: 44px;
            height: 44px;
            border: 0;
            background: transparent;
            font-size: 18px;
            cursor: pointer;
            color: var(--text-secondary);
            border-radius: 10px;
            transition: all .2s;
        }
        .reveal-close:hover {
            color: var(--text-primary);
            background: var(--primary-soft);
        }
        .kai-form {
            padding: 12px 32px 26px;
        }
        .kai-form label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            display: block;
        }
        .kai-form .field {
            margin-bottom: 20px;
        }
        .kai-form input,
        .kai-form select {
            width: 100%;
            border: 1px solid var(--line);
            border-radius: 8px;
            height: 46px;
            padding: 0 14px;
            font-size: 15px;
            font-family: var(--font-main);
            color: var(--text-primary);
            background: #fff;
            transition: border .2s, box-shadow .2s;
        }
        .kai-form input:focus,
        .kai-form select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(27, 111, 217, .1);
        }
        .kai-form textarea {
            width: 100%;
            border: 1px solid var(--line);
            border-radius: 8px;
            padding: 14px;
            font-size: 15px;
            line-height: 1.7;
            font-family: var(--font-main);
            box-shadow: none;
        }
        .kai-privacy {
            margin: 8px 0 20px;
        }
        .privacy-checks {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            margin: 8px 0 12px;
        }
        .privacy-line {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Footer */
        .kai-footer {
            background: #fff;
            border-top: 1px solid var(--line);
            padding: 60px 0 0;
            margin-left: var(--aside-w);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand-name {
            font-size: 19px;
        }
        .footer-brand .brand-sub {
            border: 0;
            padding: 0;
            margin-top: 10px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--line);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: var(--text-secondary);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* 通用徽标与图片处理 */
        .img-cover {
            object-fit: cover;
            font-family: var(--font-main);
        }

        /* 动画 */
        @keyframes floatY {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-12px);
            }
        }

        /* Reveal 遮罩：Foundation 类已提供，这里做定制 */
        .reveal-overlay {
            background: rgba(12, 19, 33, .55);
            backdrop-filter: blur(3px);
        }

        @media (max-width: 1023px) {
            .kai-aside {
                display: none;
            }
            .kai-content {
                margin-left: 0;
            }
            .ky-topbar {
                display: flex !important;
            }
            .kai-content {
                padding-top: var(--top-h);
            }
            .kai-footer {
                margin-left: 0;
            }
            .kai-container {
                padding: 0 24px;
            }
            .section-pad {
                padding: 56px 0;
            }
            .hero-stats {
                margin-top: 36px;
            }
        }
        @media (max-width: 767px) {
            .kai-container {
                padding: 0 16px;
            }
            .section-pad {
                padding: 45px 0;
            }
            .section-head {
                margin-bottom: 30px;
            }
            .pain-grid,
            .solutions-grid {
                grid-template-columns: 1fr;
            }
            .app-feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-item {
                flex-direction: column;
            }
            .hero-cta {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-cta .kai-btn {
                width: 100%;
            }
            .cta-strip {
                padding: 40px 25px;
            }
            .cta-strip .kai-btn {
                width: 100%;
                margin-top: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .ky-hero {
                min-height: auto;
                padding: 32px 0 56px;
            }
            .hero-inner {
                padding: 52px 0 60px;
            }
            .hero-badge {
                font-size: 12px;
            }
            .ky-hero h1 {
                font-size: 1.85rem;
            }
            .hero-sub {
                font-size: 15px;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .process-step::after {
                display: none;
            }
            .achieve-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* Foundation 清除默认味道 */
        .button {
            margin: 0;
        }
        .reveal {
            padding: 0;
            border: none;
        }
        a {
            outline: none;
        }
        a:visited {
            color: var(--primary);
        }
        input,
        select,
        textarea {
            margin: 0;
            box-shadow: none;
        }

/* roulang page: article */
:root {
    --primary: #1B6FD9;
    --primary-strong: #0F4FA8;
    --primary-soft: #E7F0FA;
    --accent: #D98E32;
    --bg: #F6F8FB;
    --surface: #FFFFFF;
    --text-primary: #1A2733;
    --text-secondary: #5B6B7B;
    --line: #D9E1EA;
    --radius-card: 16px;
    --radius-elem: 10px;
    --shadow-card: 0 2px 10px rgba(26,39,51,0.05);
    --shadow-hover: 0 10px 30px rgba(26,39,51,0.08);
    --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color .2s ease;
}

a:visited {
    color: var(--primary-strong);
}

a:hover {
    color: var(--primary-strong);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(27, 111, 217, 0.5);
}

img {
    max-width: 100%;
    height: auto;
    object-fit: cover;
}

.kai-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.kai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    padding: .875rem 1.75rem;
    border-radius: var(--radius-elem);
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--primary);
    transition: background .2s ease, transform .2s ease, box-shadow .2s ease, color .2s ease;
    font-size: 15px;
}

.kai-btn i {
    margin-right: 8px;
}

.kai-btn:hover {
    background: var(--primary-strong);
    color: #fff;
    transform: translateY(-1px);
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(15, 79, 168, 0.25);
}

.kai-btn:focus {
    outline: 3px solid rgba(27, 111, 217, 0.25);
    outline-offset: 2px;
}

.kai-btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--primary);
    padding: .875rem 1.75rem;
    border-radius: var(--radius-elem);
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--primary);
    transition: background .2s ease, transform .2s ease, color .2s ease;
    font-size: 15px;
}

.kai-btn-outline:hover {
    background: var(--primary-soft);
    color: var(--primary-strong);
    transform: translateY(-1px);
    text-decoration: none;
}

.kai-btn-outline:focus {
    outline: 3px solid rgba(27, 111, 217, 0.25);
    outline-offset: 2px;
}

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

.side-nav {
    width: 240px;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    background: #fff;
    z-index: 1030;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--line);
    padding: 24px 16px 16px;
    transition: transform .25s ease;
}

.side-nav .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px 20px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 16px;
}

.brand-logo {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 22px;
    font-weight: 700;
    flex-shrink: 0;
    position: relative;
    letter-spacing: -1px;
}

.brand-logo span {
    font-size: 19px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 40%, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.brand-text {
    flex: 1;
    min-width: 0;
}

.brand-text .brand-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.brand-text .brand-tagline {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: .5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.side-nav .nav-group {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.side-nav .nav-group .nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.side-nav .nav-item {
    display: flex;
    align-items: center;
    padding: 12px 16px 12px 22px;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: background .18s ease, color .18s ease;
    margin-bottom: 2px;
    text-decoration: none;
}

.side-nav .nav-item i {
    width: 24px;
    text-align: center;
    margin-right: 10px;
    font-size: 16px;
    opacity: .7;
    color: var(--text-secondary);
    transition: color .2s ease;
}

.side-nav .nav-item:hover {
    background: rgba(27, 111, 217, 0.05);
    color: var(--text-primary);
    text-decoration: none;
}

.side-nav .nav-item.active {
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-weight: 600;
}

.side-nav .nav-item.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--primary);
}

.side-nav .nav-item.active i,
.side-nav .nav-item:hover i {
    color: var(--primary);
    opacity: 1;
}

.aside-tag {
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 14px 16px 8px 22px;
    font-weight: 600;
}

.side-nav .nav-bottom {
    padding: 16px 6px 4px;
    border-top: 1px solid var(--line);
}

.side-nav .nav-bottom span {
    font-size: 12px;
    color: var(--text-secondary);
}

.main-content {
    flex: 1;
    min-width: 0;
    margin-left: 240px;
    background: var(--bg);
    display: flex;
    flex-direction: column;
}

.topbar {
    display: none;
    position: sticky;
    top: 0;
    width: 100%;
    height: 56px;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    z-index: 1100;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--line);
}

.topbar .mobile-brand {
    font-weight: 700;
    font-size: 17px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar .mobile-logo {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
}

.topbar .menu-btn {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-primary);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background .2s ease;
}

.topbar .menu-btn:hover {
    background: var(--primary-soft);
}

.topbar .menu-btn:focus {
    outline: 3px solid rgba(27, 111, 217, 0.25);
}

.drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(26, 39, 51, 0.45);
    z-index: 1045;
    opacity: 0;
    transition: opacity .25s ease;
}

.drawer-overlay.open {
    display: block;
    opacity: 1;
}

.drawer-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 280px;
    background: #fff;
    z-index: 1050;
    transform: translateX(-100%);
    transition: transform .25s ease;
    overflow-y: auto;
    padding: 28px 20px 16px;
    box-shadow: 4px 0 12px rgba(0,0,0,.06);
}

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

.drawer-nav .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 16px;
}

.drawer-nav .brand-logo {
    width: 38px;
    height: 38px;
    font-size: 20px;
}

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

.drawer-nav .nav-item {
    display: flex;
    align-items: center;
    padding: 12px 14px;
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 2px;
}

.drawer-nav .nav-item i {
    width: 24px;
    text-align: center;
    margin-right: 10px;
    opacity: .7;
    color: var(--text-secondary);
}

.drawer-nav .nav-item:hover {
    text-decoration: none;
    background: rgba(27,111,217,.05);
}

.drawer-nav .nav-item.active {
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-weight: 600;
}

.drawer-nav .nav-item.active i {
    color: var(--primary);
    opacity: 1;
}

.drawer-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    border-radius: 10px;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drawer-close:hover {
    background: var(--primary-soft);
}

.page-header {
    padding: 32px 0 0;
}

.breadcrumb {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.breadcrumb i {
    font-size: 12px;
    color: var(--line);
}

.breadcrumb .current {
    color: var(--text-primary);
    font-weight: 500;
}

.article-area {
    padding: 48px 0 40px;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 760px) 1fr;
    gap: 48px;
    align-items: start;
}

.article-main {
    flex: 1;
    min-width: 0;
}

.article-head {
    padding-bottom: 28px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
}

.article-head h1 {
    font-size: clamp(1.8rem, 3.2vw, 2.5rem);
    font-weight: 700;
    line-height: 1.35;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin: 0 0 16px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    font-size: 13px;
    color: var(--text-secondary);
}

.article-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-meta-item i {
    font-size: 13px;
    opacity: .8;
}

.article-cat-badge {
    display: inline-flex;
    background: var(--primary-soft);
    color: var(--primary-strong);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    align-items: center;
    gap: 4px;
}

.article-cat-badge:hover {
    background: var(--primary);
    color: #fff;
    text-decoration: none;
}

.article-content {
    max-width: 760px;
}

.article-content .content-body {
    font-size: 16px;
    line-height: 1.9 !important;
    color: var(--text-primary);
    word-break: break-word;
}

.article-content .content-body p {
    margin-bottom: 1.6em;
    font-size: 16px;
}

.article-content .content-body h1,
.article-content .content-body h2,
.article-content .content-body h3,
.article-content .content-body h4,
.article-content .content-body h5,
.article-content .content-body h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.4;
    margin: 1.8em 0 0.8em;
}

.article-content .content-body h2 {
    font-size: 1.4rem;
}

.article-content .content-body h3 {
    font-size: 1.2rem;
}

.article-content .content-body ul,
.article-content .content-body ol {
    margin: 0 0 1.6em 1.5em;
}

.article-content .content-body li {
    margin-bottom: 0.5em;
    line-height: 1.8;
}

.article-content .content-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-soft);
    border-radius: 0 12px 12px 0;
    padding: 1em 1.4em;
    color: var(--text-secondary);
    margin: 1.8em 0;
}

.article-content .content-body img {
    border-radius: 14px;
    margin: 1.2em 0;
    max-width: 100%;
}

.article-content .content-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-content .content-body a:hover {
    color: var(--primary-strong);
}

.article-cover-image {
    margin-bottom: 24px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.article-cover-image img {
    border-radius: 16px;
    width: 100%;
    max-height: 460px;
    object-fit: cover;
    object-position: center;
}

.article-side {
    position: sticky;
    top: 30px;
    width: 100%;
}

.side-panel-item {
    background: var(--surface);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-card);
    margin-bottom: 18px;
}

.side-panel-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.side-panel-item p,
.side-panel-item li {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 13px;
    border-radius: 8px;
    font-weight: 400;
    transition: all .2s ease;
    border: 1px solid transparent;
}

.tag:hover {
    background: var(--primary-soft);
    color: var(--primary-strong);
    border-color: var(--primary);
    text-decoration: none;
}

.article-nav-btn {
    flex: 1 1 50%;
    min-width: 0;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 13px;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all .2s ease;
    color: var(--text-primary);
    flex-wrap: nowrap;
}

.article-nav-btn:hover {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
    text-decoration: none;
    color: var(--primary-strong);
}

.article-nav-btn span {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.article-nav-btn strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.article-nav-btn span i {
    margin-right: 6px;
}

.related-area {
    padding: 60px 0 36px;
}

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

.section-title-strip {
    width: 48px;
    height: 4px;
    background: var(--primary-soft);
    border-radius: 4px;
    margin-bottom: 10px;
}

.section-title-sub {
    font-size: 15px;
    color: var(--text-secondary);
}

.related-card-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.related-card {
    background: var(--surface);
    border-radius: 14px;
    border: 1px solid var(--line);
    padding: 24px;
    box-shadow: none;
    transition: box-shadow .2s ease, border-color .2s ease;
    min-width: 0;
    display: block;
}

.related-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: transparent;
    text-decoration: none;
}

.related-card .cat-label {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
    font-weight: 500;
}

.related-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.related-card p {
    font-size: 13px;
    color: var(--text-secondary);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.related-card .related-meta {
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
    align-items: center;
}

.article-not-found-area {
    background: var(--surface);
    border-radius: 16px;
    padding: 80px 32px;
    text-align: center;
    max-width: 760px;
    margin: 40px auto;
    box-shadow: var(--shadow-card);
}

.article-not-found-area i {
    font-size: 60px;
    color: var(--line);
    display: block;
    margin-bottom: 20px;
}

.article-not-found-area h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.article-not-found-area p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.big-cta {
    background: var(--primary-soft);
    border-radius: 20px;
    padding: 64px 48px;
    margin: 20px 0 0;
    text-align: center;
}

.big-cta .cta-title {
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.big-cta .cta-sub {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.kai-footer {
    background: var(--surface);
    border-top: 1px solid var(--line);
    padding: 60px 0 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 2fr 2fr 2fr;
    gap: 24px;
    padding-bottom: 40px;
}

.footer-brand {
    min-width: 0;
}

.footer-brand .brand-name {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.footer-brand .brand-sub {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    display: block;
    max-width: 90%;
}

.footer-col {
    padding: 0 8px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 10px;
    padding: 4px 0;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: var(--primary-strong);
    transform: translateX(2px);
}

.footer-bottom {
    border-top: 1px solid var(--line);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-bottom span {
    display: inline-block;
}

.reveal-overlay {
    background: rgba(26, 39, 51, 0.5) !important;
}

.reveal-modal {
    border-radius: 20px;
    max-width: 560px;
    padding: 0;
    border: 0;
    box-shadow: 0 24px 60px rgba(26, 39, 51, 0.14);
    overflow: hidden;
}

.reveal-modal .modal-pane {
    padding: 40px;
}

.reveal-modal .modal-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-primary);
    text-align: center;
}

.reveal-modal label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: block;
}

.reveal-modal input[type="text"],
.reveal-modal input[type="tel"],
.reveal-modal input[type="email"],
.reveal-modal select {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--bg);
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-primary);
    height: auto;
    box-shadow: none;
    transition: border-color .2s, box-shadow .2s;
    margin-bottom: 0;
    width: 100%;
}

.reveal-modal input[type="text"]:focus,
.reveal-modal input[type="tel"]:focus,
.reveal-modal input[type="email"]:focus,
.reveal-modal select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 111, 217, 0.15);
    background: #fff;
}

.form-group {
    margin-bottom: 20px;
}

.checkbox-row {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    margin-bottom: 14px;
}

.checkbox-row input[type="checkbox"] {
    margin-top: 5px;
    width: 18px;
    height: 18px;
}

.privacy-note {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: center;
    margin-top: 12px;
}

.close-button {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: transparent;
    border-radius: 50%;
    transition: background .2s ease;
}

.close-button:hover {
    background: var(--primary-soft);
}

/* Responsive Breakpoints  */
@media screen and (max-width: 1023.98px) {
    .side-nav {
        transform: translateX(-100%);
    }

    .side-nav.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }

    .topbar {
        display: flex;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

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

    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-side {
        display: none;
    }
}

@media screen and (max-width: 900px) {
    .related-card-list {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .related-card-list .related-card {
        max-width: 100%;
    }
}

@media screen and (max-width: 767.98px) {
    .kai-container {
        padding: 0 20px;
    }

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        justify-content: center;
        text-align: center;
    }

    .article-head h1 {
        font-size: clamp(1.4rem, 4vw, 1.8rem);
    }

    .article-meta {
        gap: 12px 16px;
    }

    .related-area {
        padding: 40px 0 20px;
    }
}

@media screen and (max-width: 640px) {
    .kai-container {
        padding: 0 16px;
    }

    .topbar {
        padding: 0 12px;
    }

    .article-nav-buttons {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .related-card-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .reveal-modal .modal-pane {
        padding: 30px 20px;
    }

    .big-cta {
        padding: 40px 20px;
    }

    .article-content .content-body {
        font-size: 15px;
    }

    .article-content .content-body p {
        margin-bottom: 1.4em;
    }
}

/* roulang page: category2 */
:root {
        --primary: #1B6FD9;
        --primary-strong: #0F4FA8;
        --primary-soft: #E7F0FA;
        --accent: #D98E32;
        --bg: #F6F8FB;
        --surface: #FFFFFF;
        --text-primary: #1A2733;
        --text-secondary: #5B6B7B;
        --line: #D9E1EA;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-xs: 8px;
        --shadow: 0 2px 10px rgba(26, 39, 51, 0.05);
        --shadow-hover: 0 10px 30px rgba(26, 39, 51, 0.08);
        --trans: 0.2s ease;
        --container-max: 1200px;
    }

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

    html {
        scroll-behavior: smooth;
        font-size: 16px;
    }

    body {
        font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        background: var(--bg);
        color: var(--text-primary);
        line-height: 1.75;
        min-height: 100vh;
        overflow-x: hidden;
    }

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

    a {
        color: var(--primary);
        text-decoration: none;
        transition: color var(--trans);
    }

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

    a:visited {
        color: var(--primary-strong);
    }

    a:focus-visible,
    button:focus-visible,
    .accordion-item button:focus-visible,
    input:focus-visible,
    select:focus-visible {
        outline: 3px solid rgba(27, 111, 217, 0.25);
        outline-offset: 2px;
    }

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

    .kai-aside {
        width: 240px;
        background: #fff;
        border-right: 1px solid var(--line);
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        height: 100vh;
        z-index: 100;
        display: flex;
        flex-direction: column;
        padding: 24px 16px;
    }

    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 8px 20px;
        border-bottom: 1px solid var(--line);
        margin-bottom: 8px;
    }

    .logo-mark {
        width: 36px;
        height: 36px;
        background: var(--primary);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 18px;
        font-weight: 600;
        flex-shrink: 0;
    }

    .brand-name {
        font-weight: 700;
        color: var(--text-primary);
        font-size: 18px;
        white-space: nowrap;
    }

    .kai-aside nav {
        flex: 1;
        overflow-y: auto;
        padding-top: 16px;
    }

    .nav-group {
        display: flex;
        flex-direction: column;
        gap: 6px;
    }

    .aside-tag {
        font-size: 12px;
        color: var(--text-secondary);
        text-transform: uppercase;
        letter-spacing: 0.04em;
        padding: 18px 12px 6px 12px;
        font-weight: 600;
        opacity: 0.8;
    }

    .nav-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 14px;
        color: var(--text-secondary);
        font-size: 15px;
        border-radius: 8px;
        transition: background var(--trans), color var(--trans);
        text-decoration: none;
    }

    .nav-item i {
        width: 20px;
        text-align: center;
        font-size: 16px;
    }

    .nav-item:hover {
        background: rgba(27, 111, 217, 0.06);
        color: var(--text-primary);
    }

    .nav-item.active {
        color: var(--primary);
        background: rgba(27, 111, 217, 0.1);
        border-bottom-left-radius: 8px;
        border-top-left-radius: 8px;
        position: relative;
        font-weight: 600;
    }

    .nav-item.active::before {
        content: "";
        position: absolute;
        left: -16px;
        top: 0;
        bottom: 0;
        width: 4px;
        background: var(--primary);
        border-radius: 0 4px 4px 0;
    }

    .aside-footer {
        padding: 12px 8px 4px;
        border-top: 1px solid #eef2f5;
        font-size: 12px;
        color: #9aa8b8;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .aside-footer .copy {
        font-size: 11px;
        color: #8a9aa9;
        line-height: 1.5;
        white-space: normal;
        word-break: break-all;
    }

    .kai-main {
        flex: 1;
        margin-left: 240px;
        min-width: 0;
        width: calc(100% - 240px);
    }

    .kai-container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 32px;
    }

    .mobile-header {
        display: none;
    }

    .page-banner {
        padding: 56px 0 32px;
        position: relative;
    }

    .page-banner-inner {
        padding: 32px 0 12px;
        border-bottom: 1px solid var(--line);
    }

    .breadcrumb {
        font-size: 13px;
        margin-bottom: 16px;
        color: var(--text-secondary);
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .breadcrumb a {
        color: var(--text-secondary);
        transition: color var(--trans);
    }

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

    .page-h1 {
        font-size: clamp(2rem, 3vw, 2.75rem);
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 16px;
    }

    .page-sub {
        font-size: 17px;
        color: var(--text-secondary);
        max-width: 720px;
        line-height: 1.8;
    }

    .category-links-row {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
        margin-top: 20px;
    }

    .category-link-item {
        background: var(--primary-soft);
        border-radius: 30px;
        padding: 6px 16px;
        font-size: 13px;
        color: var(--primary);
        font-weight: 500;
        transition: background var(--trans);
    }

    .category-link-item:hover {
        background: #d6e4f5;
    }

    .section {
        padding: 64px 0;
    }

    .section--hero-banner {
        padding: 24px 0 48px;
    }

    .hero-banner-img {
        border-radius: 16px;
        overflow: hidden;
        background: var(--primary-soft);
    }

    .hero-banner-img img {
        width: 100%;
        height: 320px;
        object-fit: cover;
        border-radius: 16px;
        display: block;
    }

    .hero-banner-grid {
        display: flex;
        gap: 40px;
        align-items: center;
        flex-direction: row-reverse;
        margin-top: 16px;
        background: #fff;
        border-radius: var(--radius);
        padding: 36px;
        box-shadow: var(--shadow);
    }

    .hero-banner-text {
        flex: 1;
    }

    .hero-banner-text h2 {
        font-size: clamp(1.5rem, 2vw, 2.25rem);
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 16px;
        line-height: 1.4;
    }

    .hero-banner-text p {
        font-size: 15px;
        line-height: 1.8;
        color: var(--text-secondary);
        margin-bottom: 0;
    }

    .hero-banner-visual {
        flex: 0 0 420px;
    }

    .hero-banner-visual img {
        width: 100%;
        height: auto;
        border-radius: 16px;
        aspect-ratio: 16 / 11;
        object-fit: cover;
        display: block;
    }

    .section--cards {
        background: #fff;
    }

    .section-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 24px;
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: clamp(1.5rem, 2vw, 2.25rem);
        font-weight: 700;
        line-height: 1.35;
        margin: 0;
    }

    .section-header .header-sub {
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.7;
        margin-top: 8px;
        max-width: 600px;
    }

    .section-header-right {
        text-align: right;
        flex-shrink: 0;
    }

    .service-features {
        display: flex;
        gap: 32px;
    }

    .service-card {
        flex: 1;
        background: var(--bg);
        border-radius: var(--radius);
        padding: 32px;
        border: 1px solid #eaf0f5;
        transition: transform var(--trans), box-shadow var(--trans);
    }

    .service-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        background: #fff;
    }

    .service-card .num-block {
        font-size: 14px;
        color: var(--accent);
        font-weight: 600;
        margin-bottom: 20px;
        letter-spacing: 0.05em;
        display: inline-block;
        width: 42px;
        height: 42px;
        background: var(--primary-soft);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .service-card h3 {
        font-size: 1.25rem;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--text-primary);
    }

    .service-card p {
        font-size: 15px;
        line-height: 1.8;
        color: var(--text-secondary);
        flex-grow: 1;
    }

    .card-tag {
        display: inline-block;
        background: rgba(217, 142, 50, 0.1);
        color: var(--accent);
        font-size: 12px;
        font-weight: 600;
        padding: 4px 10px;
        border-radius: 6px;
        margin-top: 16px;
    }

    .middle-cta-section {
        padding: 0;
        margin: 0;
        background: #fff;
        padding-bottom: 56px;
    }

    .inner-banner-cta {
        background: var(--bg);
        border-radius: var(--radius);
        display: flex;
        padding: 44px 48px;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        background-image: linear-gradient(135deg, #fff 0%, var(--primary-soft) 100%);
    }

    .inner-banner-cta .text-block h2 {
        font-size: 1.75rem;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--text-primary);
        font-size: clamp(1.375rem, 2vw, 1.75rem);
    }

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

    .inner-banner-cta .cta-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 0.875rem 1.75rem;
        font-size: 15px;
        font-weight: 600;
        border-radius: 10px;
        border: none;
        line-height: 1.25;
        transition: all 0.2s ease;
        cursor: pointer;
        text-decoration: none;
        white-space: nowrap;
    }

    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 2px 6px rgba(27, 111, 217, 0.12);
    }

    .btn-primary:hover {
        background: var(--primary-strong);
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 6px 14px rgba(27, 111, 217, 0.18);
    }

    .btn-secondary {
        border: 1px solid var(--primary);
        color: var(--primary);
        background: #fff;
    }

    .btn-secondary:hover {
        background: rgba(27, 111, 217, 0.05);
        color: var(--primary-strong);
    }

    .section--audience {
        background: var(--bg);
        border-top: 1px solid #e9eef3;
        border-bottom: 1px solid #e9eef3;
    }

    .audience-wrap {
        max-width: 900px;
        margin: 0 auto;
        display: flex;
        gap: 40px;
        flex-wrap: wrap;
    }

    .audience-column-left {
        flex: 1 1 400px;
    }

    .audience-column-right {
        flex: 1 1 380px;
    }

    .ui-mark {
        background: #fff;
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        overflow: hidden;
    }

    .ui-mark img {
        width: 100%;
        height: 240px;
        object-fit: cover;
        aspect-ratio: 16 / 10;
    }

    .audience-list {
        margin-top: 12px;
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .aud-list-item {
        display: flex;
        gap: 14px;
        background: #fff;
        padding: 20px 22px;
        border-radius: 12px;
        border: 1px solid #e9eef3;
        line-height: 1.7;
    }

    .aud-list-item .ico-block {
        width: 38px;
        height: 38px;
        min-width: 38px;
        background: var(--primary-soft);
        color: var(--primary);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
    }

    .aud-list-item strong {
        display: block;
        font-weight: 600;
        font-size: 16px;
        color: var(--text-primary);
        margin-bottom: 3px;
        line-height: 1.5;
    }

    .aud-list-item span {
        font-size: 14px;
        color: var(--text-secondary);
    }

    .section--data {
        background: #fff;
    }

    .stats-card {
        background: var(--bg);
        border-radius: var(--radius);
        padding: 48px 44px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 32px;
        flex-wrap: wrap;
    }

    .stat-item {
        flex: 1;
        min-width: 200px;
        text-align: left;
        display: flex;
        flex-direction: column;
    }

    .stat-item .stat-num {
        font-size: clamp(2rem, 2.8vw, 3.2rem);
        font-weight: 800;
        line-height: 1.1;
        color: var(--primary);
        font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        font-variant-numeric: tabular-nums;
    }

    .stat-item .stat-label {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.5;
        margin-top: 8px;
    }

    .stat-item .stat-label .highlight-stat-label {
        color: var(--text-primary);
        font-weight: 600;
    }

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

    .workflow-steps {
        display: flex;
        gap: 24px;
        margin: 32px 0 0;
    }

    .workflow-step-item {
        flex: 1;
        background: #fff;
        border-radius: var(--radius);
        padding: 28px 24px;
        border-top: 4px solid var(--primary-soft);
        position: relative;
    }

    .workflow-step-item .step-no {
        font-size: 13px;
        color: var(--accent);
        font-weight: 700;
        letter-spacing: 0.03em;
        margin-bottom: 10px;
        display: block;
    }

    .workflow-step-item h3 {
        font-size: 1.125rem;
        font-weight: 700;
        margin-bottom: 8px;
        line-height: 1.4;
    }

    .workflow-step-item p {
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-secondary);
    }

    .workflow-arrow {
        align-self: center;
        color: #c7d4e1;
        font-size: 20px;
    }

    .section--scenarios {
        background: #fff;
    }

    .scenario-card {
        background: #fff;
        border-radius: var(--radius);
        padding: 30px 30px;
        border: 1px solid #e9eef3;
        box-shadow: var(--shadow);
        transition: box-shadow var(--trans), transform var(--trans);
        display: flex;
        gap: 28px;
        align-items: flex-start;
        margin-bottom: 24px;
    }

    .scenario-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-2px);
    }

    .scenario-cover {
        width: 30%;
    }

    .scenario-cover img {
        border-radius: 12px;
        width: 100%;
        height: 160px;
        object-fit: cover;
        aspect-ratio: 16 / 10;
    }

    .scenario-content {
        flex: 1;
        position: relative;
    }

    .scenario-content .tag {
        display: inline-block;
        background: var(--primary-soft);
        color: var(--primary);
        font-size: 12px;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 20px;
        margin-bottom: 12px;
    }

    .scenario-content h3 {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 10px;
        line-height: 1.5;
    }

    .scenario-content p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        margin-bottom: 12px;
    }

    .scenario-meta {
        display: flex;
        gap: 24px;
        align-items: center;
        font-size: 13px;
        color: var(--text-secondary);
        flex-wrap: wrap;
    }

    .scenario-meta span i {
        color: var(--primary);
        width: 18px;
    }

    .btn-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--primary);
        font-size: 14px;
        font-weight: 600;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 8px 0;
        transition: color var(--trans);
        margin-top: 12px;
    }

    .btn-link i {
        transition: transform var(--trans);
    }

    .btn-link:hover {
        color: var(--primary-strong);
    }

    .btn-link:hover i {
        transform: translateX(5px);
    }

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

    .faq-container {
        max-width: 880px;
        margin: 0 auto;
    }

    .accordion-item {
        background: #fff;
        border-radius: 12px;
        margin-bottom: 14px;
        border: 1px solid #e9eef3;
        overflow: hidden;
        transition: box-shadow var(--trans);
    }

    .accordion-item:hover {
        border-color: #c9d8ec;
        box-shadow: var(--shadow);
    }

    .accordion-title {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        padding: 20px 24px;
        cursor: pointer;
        font-weight: 500;
        font-size: 16px;
        min-height: 52px;
        color: var(--text-primary);
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        font-family: inherit;
        transition: color 0.2s;
        gap: 16px;
    }

    .accordion-title span:first-child {
        flex: 1;
    }

    .accordion-title .arrow {
        width: 24px;
        height: 24px;
        min-width: 24px;
        border-radius: 6px;
        background: var(--primary-soft);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        transition: transform 0.25s ease;
        font-size: 12px;
        flex-shrink: 0;
    }

    .accordion-item.open .accordion-title {
        color: var(--primary);
        font-weight: 600;
    }

    .accordion-item.open .arrow {
        transform: rotate(180deg);
        background: var(--primary);
        color: #fff;
    }

    .accordion-content {
        display: none;
        padding: 0 24px 22px;
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        border-top: 1px solid #eef2f6;
        margin: 0 24px 0;
        padding-left: 0;
        padding-right: 0;
        padding-top: 16px;
    }

    .accordion-item.open .accordion-content {
        display: block;
    }

    .cta-section {
        background: #fff;
    }

    .cta-card {
        background: var(--bg);
        border-radius: 20px;
        position: relative;
        padding: 56px;
        text-align: center;
    }

    .cta-card .cta-title {
        font-size: clamp(1.5rem, 2.2vw, 2.25rem);
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 12px;
        line-height: 1.4;
    }

    .cta-card p {
        color: var(--text-secondary);
        font-size: 16px;
        margin-bottom: 24px;
        max-width: 570px;
        margin-left: auto;
        margin-right: auto;
        line-height: 1.75;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }

    .kai-footer {
        background: #fff;
        border-top: 1px solid var(--line);
        padding: 60px 0 24px;
    }

    .footer-grid {
        display: flex;
        gap: 40px;
        margin-bottom: 40px;
    }

    .footer-brand {
        flex: 1.4;
    }

    .footer-col {
        flex: 0 1 220px;
    }

    .footer-col h4 {
        font-size: 16px;
        margin-bottom: 12px;
        color: var(--text-primary);
        font-weight: 700;
    }

    .footer-col a {
        color: var(--text-secondary);
        display: block;
        font-size: 14px;
        padding: 4px 0;
        line-height: 1.6;
    }

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

    .brand-sub {
        display: block;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.8;
        max-width: 390px;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        color: var(--text-secondary);
        font-size: 13px;
        padding-top: 20px;
        border-top: 1px solid var(--line);
        gap: 16px;
        flex-wrap: wrap;
        line-height: 1.6;
    }

    .accent-strip {
        background: var(--primary-soft);
        height: 4px;
        border: 0;
        margin: 0;
    }

    .ui-kicker {
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        letter-spacing: 0.1em;
        text-transform: uppercase;
        display: block;
        margin-bottom: 8px;
    }

    @media (max-width: 1023.98px) {
        .kai-aside {
            display: none;
        }

        .kai-main {
            margin-left: 0;
            width: 100%;
        }

        .mobile-header {
            display: flex;
            position: sticky;
            top: 0;
            z-index: 110;
            height: 56px;
            background: #fff;
            border-bottom: 1px solid var(--line);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }

        .mobile-header .mobile-menu-btn {
            background: #fff;
            border: none;
            font-size: 22px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-header .mobile-brand {
            font-weight: 700;
            font-size: 16px;
            color: var(--text-primary);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 230;
        }

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

        .drawer-mask {
            background: rgba(26, 42, 58, 0.42);
            position: absolute;
            inset: 0;
            animation: fadeIn 0.18s ease both;
        }

        .drawer-shell {
            background: #fff;
            width: 280px;
            height: 100%;
            position: relative;
            z-index: 2;
            overflow-y: auto;
            padding: 22px 18px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
            animation: slideInLeft 0.18s ease both;
        }

        .drawer-shell .brand-logo {
            border-bottom: 1px solid var(--line);
            padding-bottom: 16px;
            margin-bottom: 8px;
            justify-content: flex-start;
            padding-left: 6px;
            padding-right: 6px;
        }

        .drawer-shell .brand-logo .brand-name {
            font-size: 17px;
        }

        .drawer-nav .nav-item {
            padding: 10px 14px;
            font-size: 15px;
        }

        .drawer-nav .aside-tag {
            padding: 16px 12px 4px;
        }

        .drawer-nav .nav-item.active::before {
            left: -14px;
            width: 3px;
            top: 6px;
            bottom: 6px;
        }

        .drawer-nav {
            padding-top: 16px;
        }
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
        }
        to {
            opacity: 1;
        }
    }

    @keyframes slideInLeft {
        from {
            transform: translateX(-40px);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    @media (max-width: 767.98px) {
        .kai-container {
            padding: 0 16px;
        }

        .section {
            padding: 44px 0;
        }

        .page-banner {
            padding: 32px 0 24px;
        }

        .page-banner-inner {
            padding: 20px 0 8px;
        }

        .pagesub {
            font-size: 15px;
        }

        .hero-banner-grid {
            display: block;
            padding: 22px;
        }

        .hero-banner-visual {
            width: 100%;
            margin-bottom: 18px;
        }

        .hero-banner-visual img {
            width: 100%;
            max-height: 220px;
        }

        .hero-banner-text p {
            font-size: 14px;
        }

        .section-header {
            display: block;
        }

        .section-header-right {
            display: none;
        }

        .service-features {
            flex-direction: column;
            gap: 14px;
        }

        .service-card {
            padding: 24px;
        }

        .stats-card {
            padding: 36px 28px;
            flex-direction: column;
            text-align: center;
            gap: 40px;
        }

        .stat-item {
            min-width: auto;
            width: 100%;
            text-align: center;
            align-items: center;
        }

        .workflow-steps {
            flex-direction: column;
            gap: 14px;
        }

        .workflow-arrow {
            transform: rotate(90deg);
            display: none;
        }

        .scenario-card {
            display: block;
            padding: 20px;
        }

        .scenario-cover {
            width: 100%;
            margin-bottom: 12px;
        }

        .scenario-cover img {
            width: 100%;
            height: 180px;
        }

        .inner-banner-cta {
            display: block;
            padding: 36px 28px;
        }

        .inner-banner-cta .text-block {
            margin-bottom: 20px;
        }

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

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

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

        .cta-card {
            padding: 32px 20px;
        }

        .footer-grid {
            flex-direction: column;
            gap: 32px;
        }

        .footer-col {
            flex: 0 0 auto;
        }

        .btn-primary,
        .btn-secondary {
            width: 100%;
        }

        .footer-bottom {
            font-size: 12px;
        }
    }

    @media (max-width: 500.98px) {
        .kai-container {
            padding: 0 16px;
        }

        .page-h1 {
            font-size: 1.6rem;
        }

        .scenario-card .scenario-content p {
            font-size: 14px;
        }

        .service-card h3 {
            font-size: 1.125rem;
        }

        .inner-banner-cta .text-block h2 {
            font-size: 1.2rem;
        }

        .stat-item .stat-num {
            font-size: 1.8rem;
        }

        .aud-list-item {
            padding: 16px;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #1B6FD9;
            --primary-strong: #0F4FA8;
            --primary-soft: #E7F0FA;
            --accent: #D98E32;
            --bg: #F6F8FB;
            --surface: #FFFFFF;
            --text-primary: #1A2733;
            --text-secondary: #5B6B7B;
            --line: #D9E1EA;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-card: 0 2px 10px rgba(26, 39, 51, 0.05);
            --shadow-hover: 0 10px 30px rgba(26, 39, 51, 0.08);
            --aside-w: 240px;
            --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --content-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            color: var(--text-primary);
            background: var(--bg);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
        }

        a:hover {
            color: var(--primary-strong);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
        }

        a:visited {
            color: var(--primary-strong);
        }

        a.button, a.btn {
            text-decoration: none;
        }

        button:focus-visible, a:focus-visible, summary:focus-visible {
            outline: 3px solid rgba(27, 111, 217, 0.25);
            outline-offset: 2px;
        }

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

        .drawer-mask {
            display: none;
        }

        .kai-aside {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            width: var(--aside-w);
            background: var(--surface);
            border-right: 1px solid var(--line);
            z-index: 80;
            display: flex;
            flex-direction: column;
            padding: 26px 16px 22px;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .side-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 8px 18px;
            border-bottom: 1px solid var(--line);
            margin-bottom: 18px;
        }

        .brand-badge {
            flex: 0 0 auto;
            width: 40px;
            height: 40px;
            border-radius: 11px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 14px rgba(27, 111, 217, 0.22);
        }

        .brand-copy {
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .brand-copy strong {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .brand-copy small {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 2px;
            white-space: nowrap;
        }

        .aside-nav {
            flex: 1 1 auto;
        }

        .nav-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .aside-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 12px 14px 6px;
            letter-spacing: 0.02em;
        }

        .nav-item {
            position: relative;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: #3B4856;
            line-height: 1.4;
            transition: background-color 0.2s ease, color 0.2s ease;
        }

        .nav-item i {
            width: 18px;
            text-align: center;
            font-size: 15px;
            flex: 0 0 auto;
            color: #8595A3;
            transition: color 0.2s ease;
        }

        .nav-item:hover {
            background: rgba(27, 111, 217, 0.05);
            color: var(--text-primary);
            text-decoration: none;
        }

        .nav-item:hover i {
            color: var(--primary);
        }

        .nav-item.active {
            background: var(--primary-soft);
            color: var(--primary-strong);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
        }

        .nav-item.active i {
            color: var(--primary);
        }

        .aside-foot {
            padding: 18px 10px 0;
            border-top: 1px solid var(--line);
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .kai-topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 75;
            display: none;
            align-items: center;
            gap: 12px;
            height: 60px;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 0 16px;
        }

        .menu-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: transparent;
            border: 0;
            border-radius: 10px;
            font-size: 18px;
            color: var(--text-primary);
            cursor: pointer;
            transition: background-color 0.2s ease;
        }

        .menu-toggle:hover {
            background: var(--primary-soft);
        }

        .topbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .topbar-brand .brand-badge {
            width: 32px;
            height: 32px;
            border-radius: 9px;
            font-size: 15px;
        }

        .kai-shell {
            min-height: 100vh;
            margin-left: var(--aside-w);
            display: flex;
            flex-direction: column;
        }

        .kai-main {
            flex: 1 1 auto;
        }

        .cat-section {
            padding: 76px 0;
        }

        .sec-head {
            margin-bottom: 44px;
        }

        .sec-index {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .sec-head h2 {
            font-size: clamp(1.5rem, 2vw, 2.15rem);
            line-height: 1.3;
            margin: 0 0 12px;
            color: var(--text-primary);
            font-weight: 700;
        }

        .sec-head p.sec-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0;
        }

        .sec-line {
            width: 52px;
            height: 4px;
            background: var(--primary-soft);
            border-radius: 4px;
            margin-top: 18px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0.875rem 1.75rem;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(27, 111, 217, 0.16);
        }

        .btn-primary:hover {
            background: var(--primary-strong);
            transform: translateY(-1px);
            box-shadow: 0 12px 26px rgba(27, 111, 217, 0.20);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(27, 111, 217, 0.4);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-soft);
            border-color: var(--primary-soft);
            color: var(--primary-strong);
        }

        .btn-white {
            background: #fff;
            color: var(--primary-strong);
        }

        .btn-white:hover {
            background: var(--primary-soft);
            color: var(--primary-strong);
            transform: translateY(-1px);
        }

        /* -------- 分类页 Hero -------- */

        .cat-hero {
            position: relative;
            padding: 92px 0 84px;
            overflow: hidden;
            background:
                linear-gradient(90deg, rgba(246, 248, 251, 0.95) 0%, rgba(246, 248, 251, 0.78) 52%, rgba(246, 248, 251, 0.5) 100%),
                url("/assets/images/backpic/back-2.png") center / cover no-repeat;
            border-bottom: 1px solid var(--line);
        }

        .cat-hero .kai-container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--line);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

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

        .breadcrumb span {
            opacity: 0.55;
        }

        .cat-hero h1 {
            margin: 0 0 18px;
            font-size: clamp(2.25rem, 4vw, 3.1rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .cat-hero .hero-lead {
            max-width: 660px;
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* -------- 能力全景 -------- */

        .intro-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 50px;
            align-items: center;
        }

        .intro-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
            aspect-ratio: 4 / 3;
            background: var(--primary-soft);
        }

        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .intro-copy h3 {
            margin: 0 0 18px;
            font-size: clamp(1.25rem, 1.5vw, 1.75rem);
            color: var(--text-primary);
            line-height: 1.35;
        }

        .intro-copy p {
            margin: 0 0 20px;
            color: var(--text-secondary);
            font-size: 16px;
        }

        .intro-list {
            display: grid;
            gap: 14px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .intro-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .intro-list i {
            flex: 0 0 auto;
            margin-top: 3px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 11px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        /* -------- 功能模块卡片 -------- */

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

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

        .feature-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.22s ease, transform 0.22s ease;
            min-height: 264px;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .feature-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .feature-card h3 {
            margin: 0;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .feature-card p {
            margin: 0;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            flex: 1;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 4px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 999px;
            background: var(--bg);
            color: var(--text-secondary);
            font-size: 12px;
            border: 1px solid var(--line);
        }

        .feature-link {
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            min-height: 34px;
        }

        .feature-link i {
            font-size: 13px;
            transition: transform 0.2s ease;
        }

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

        /* -------- 启动路径 -------- */

        .step-section {
            background: var(--surface);
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            counter-reset: step;
        }

        .step-item {
            position: relative;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--bg);
            padding: 26px 22px;
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .step-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.06em;
        }

        .step-item h3 {
            font-size: 17px;
            margin: 14px 0 10px;
            color: var(--text-primary);
            font-weight: 600;
            line-height: 1.4;
        }

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

        .step-line {
            display: none;
        }

        /* -------- 场景适配 -------- */

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

        .scenario-wrap {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 50px;
            align-items: start;
        }

        .scenario-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
            position: sticky;
            top: 24px;
            background: var(--primary-soft);
        }

        .scenario-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .scenario-list {
            display: grid;
            gap: 18px;
        }

        .scenario-row {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 24px 22px;
            box-shadow: 0 1px 6px rgba(26, 39, 51, 0.03);
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .scenario-row:hover {
            border-color: rgba(27, 111, 217, 0.25);
            box-shadow: var(--shadow-card);
        }

        .scenario-top {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }

        .scenario-no {
            font-size: 12px;
            color: var(--accent);
            font-weight: 700;
            letter-spacing: 0.05em;
            padding: 4px 9px;
            border-radius: 6px;
            background: rgba(217, 142, 50, 0.12);
        }

        .scenario-row h3 {
            margin: 0;
            font-size: 17px;
            color: var(--text-primary);
            font-weight: 600;
        }

        .scenario-row p {
            margin: 0 0 8px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
        }

        /* -------- CTA 面板 -------- */

        .cta-wrap {
            padding: 30px 0 90px;
        }

        .advice-panel {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 48px 54px;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            box-shadow: 0 18px 48px rgba(27, 111, 217, 0.2);
            position: relative;
            overflow: hidden;
        }

        .advice-panel::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .advice-copy {
            max-width: 620px;
            position: relative;
            z-index: 1;
        }

        .advice-copy h2 {
            margin: 0 0 12px;
            font-size: clamp(1.4rem, 2vw, 2rem);
            line-height: 1.35;
            font-weight: 700;
        }

        .advice-copy p {
            margin: 0;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
        }

        .advice-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        /* -------- FAQ -------- */

        .faq-section {
            padding-top: 0;
            padding-bottom: 90px;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--line);
            background: var(--surface);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .faq-item[open] {
            border-color: rgba(27, 111, 217, 0.22);
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 20px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            line-height: 1.5;
            user-select: none;
            min-height: 52px;
            transition: color 0.2s ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 13px;
            color: var(--text-secondary);
            flex: 0 0 auto;
            transition: transform 0.25s ease;
        }

        .faq-item[open] summary {
            color: var(--primary);
            border-bottom: 1px solid var(--line);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-body {
            padding: 8px 22px 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
        }

        /* -------- 页脚 -------- */

        .kai-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 52px 0 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 0.8fr 0.8fr;
            gap: 40px;
            padding-bottom: 38px;
        }

        .footer-brand .brand-name {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .brand-sub {
            display: block;
            margin-top: 12px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            max-width: 380px;
        }

        .footer-col h4 {
            margin: 0 0 14px;
            font-size: 15px;
            color: var(--text-primary);
            font-weight: 600;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            color: var(--text-secondary);
            font-size: 14px;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.6;
        }

        .footer-bottom span {
            font-variant-numeric: tabular-nums;
        }

        /* -------- 小于 1024px -------- */

        @media (max-width: 1023px) {
            .kai-topbar {
                display: flex;
            }

            .kai-aside {
                transform: translateX(-100%);
                box-shadow: none;
                transition: transform 0.2s ease, box-shadow 0.2s ease;
            }

            .kai-aside.drawer-open {
                transform: translateX(0);
                box-shadow: 16px 0 48px rgba(26, 39, 51, 0.18);
            }

            .drawer-mask {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(15, 26, 40, 0.45);
                z-index: 70;
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transition: opacity 0.2s ease, visibility 0.2s ease;
            }

            .drawer-mask.show {
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
            }

            .kai-shell {
                margin-left: 0;
                padding-top: 60px;
                min-height: 100vh;
            }

            .cat-hero {
                padding: 60px 0 56px;
            }

            .cat-section {
                padding: 56px 0;
            }

            .intro-grid,
            .scenario-wrap {
                grid-template-columns: 1fr;
            }

            .scenario-media {
                position: relative;
                top: auto;
            }

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

            .cta-wrap {
                padding: 20px 0 60px;
            }

            .advice-panel {
                padding: 36px 32px;
            }

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

        @media (max-width: 767px) {
            .kai-container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .cat-hero h1 {
                font-size: clamp(2rem, 9vw, 2.75rem);
            }

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

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

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

            .cat-section {
                padding: 44px 0;
            }

            .sec-head {
                margin-bottom: 28px;
            }

            .sec-head h2 {
                font-size: 1.6rem;
            }

            .intro-grid,
            .scenario-wrap {
                gap: 28px;
            }

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

            .feature-card {
                padding: 22px;
                min-height: 0;
            }

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

            .advice-panel {
                padding: 30px 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 30px;
            }

            .faq-item summary {
                padding: 16px;
                font-size: 15px;
            }

            .faq-body {
                padding: 6px 16px 16px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #1B6FD9;
  --primary-strong: #0F4FA8;
  --primary-soft: #E7F0FA;
  --accent: #D98E32;
  --accent-soft: #FEF3E6;
  --bg: #F6F8FB;
  --surface: #FFFFFF;
  --text-primary: #1A2733;
  --text-secondary: #5B6B7B;
  --line: #D9E1EA;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-card: 16px;
  --radius-hero: 20px;
  --shadow-sm: 0 2px 10px rgba(26,39,51,0.05);
  --shadow-md: 0 10px 30px rgba(26,39,51,0.08);
  --shadow-lg: 0 24px 60px rgba(15,79,168,0.12);
  --sidebar-w: 248px;
  --transition: 0.22s cubic-bezier(0.2, 0.75, 0.3, 1);
}

html { scroll-behavior: smooth; }

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  line-height: 1.7;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul { list-style: none; }

button, input, select, textarea {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
}

.foundation-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.kai-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 侧边导航 ===== */
.kai-sidebar {
  width: var(--sidebar-w);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--surface);
  z-index: 80;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-top: 28px;
}

.sidebar-logo {
  padding: 0 24px;
  margin-bottom: 28px;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 6px 16px rgba(27,111,217,0.24);
}

.logo-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  line-height: 1.2;
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  padding: 0 12px;
}

.nav-label {
  font-size: 12px;
  color: #9AA9B8;
  padding: 16px 12px 8px;
  letter-spacing: 1px;
  font-weight: 500;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
  transition: all var(--transition);
  border-left: 3px solid transparent;
}

.nav-item i {
  font-size: 15px;
  width: 20px;
  text-align: center;
  color: #8A9AA9;
  transition: color var(--transition);
}

.nav-item:hover {
  background: rgba(27,111,217,0.045);
  color: var(--primary);
}

.nav-item:hover i { color: var(--primary); }

.nav-item.active {
  background: var(--primary-soft);
  color: var(--primary-strong);
  border-left-color: var(--primary);
  font-weight: 600;
}

.nav-item.active i { color: var(--primary); }

.sidebar-footer-note {
  padding: 20px 24px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--text-secondary);
  text-align: left;
  line-height: 1.6;
}

/* ===== 主内容 ===== */
.kai-main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* BANNER 首屏 */
.cat-hero {
  position: relative;
  padding: 76px 0 68px;
  background:
    linear-gradient(135deg, rgba(231,240,250,0.6) 0%, rgba(246,248,251,0.2) 55%),
    url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center 30%;
  border-bottom: 1px solid rgba(217,225,234,0.3);
  overflow: hidden;
}

.cat-hero-inner {
  position: relative;
  z-index: 2;
}

.cat-hero .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-strong);
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--primary-soft);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 22px;
  letter-spacing: 0.4px;
}

.hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.cat-hero h1 {
  max-width: 640px;
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  font-weight: 700;
  line-height: 1.33;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.cat-hero h1 span {
  color: var(--primary);
  position: relative;
}

.cat-hero p.subtitle {
  max-width: 620px;
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  padding-top: 16px;
  border-top: 1px solid rgba(217,225,234,0.4);
}

.hero-crumb a {
  font-weight: 500;
  color: var(--text-primary);
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.8rem 1.7rem;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: pointer;
  border: 1.5px solid transparent;
  line-height: 1.4;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(27,111,217,0.2);
}

.btn-primary:hover {
  background: var(--primary-strong);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(15,79,168,0.25);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
  border-color: var(--primary-strong);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 22px rgba(217,142,50,0.2);
}

.btn-accent:hover {
  background: #C87A24;
  color: #fff;
  transform: translateY(-2px);
}

section { padding: 64px 0; }

/* ===== 区块常用标题 ===== */
.sec-head {
  margin-bottom: 42px;
}

.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 14px;
}

.sec-label::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--primary);
  display: inline-block;
  margin-right: 4px;
}

.sec-title {
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.sec-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 560px;
}

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

.sec-head.center .sec-label {
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}

.sec-head.center .sec-sub {
  margin-left: auto;
  margin-right: auto;
}

/* ===== 方案优势 ===== */
.benefit-wrap {
  background: var(--surface);
  border-bottom: 1px solid rgba(217,225,234,0.4);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.benefit-card {
  padding: 38px 34px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.benefit-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--primary-soft);
  opacity: 0.5;
  transition: opacity 0.2s;
}

.benefit-card:hover {
  border-color: rgba(27,111,217,0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.benefit-card .benefit-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 24px;
}

.benefit-card h3 {
  font-size: 1.25rem;
  margin-bottom: 14px;
  color: var(--text-primary);
  list-style: none;
  font-weight: 600;
}

.benefit-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.benefit-card p strong {
  color: var(--primary);
  font-weight: 600;
}

/* ===== 图示方案 block with cover image ===== */
.feature-block {
  display: flex;
  align-items: center;
  gap: 64px;
}

.feature-block + .feature-block {
  margin-top: 48px;
}

.feature-block.reverse {
  flex-direction: row-reverse;
}

.feature-media {
  flex: 1%;
  width: 50%;
  border-radius: var(--radius-hero);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s;
}

.feature-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.55s ease;
}

.feature-media:hover img {
  transform: scale(1.04);
}

.feature-content {
  flex: 1;
  padding: 8px 0;
}

.feature-content .ft-num {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 1.2px;
  font-variant-numeric: tabular-nums;
  margin-bottom: 8px;
}

.feature-content h3 {
  font-size: 1.5rem;
  margin-bottom: 18px;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.4;
}

.feature-content p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.8;
}

.feature-list {
  margin: 20px 0 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.95rem;
  color: var(--text-primary);
  padding-left: 0;
}

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

/* ===== 服务流程 ===== */
.flow-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 10px;
  position: relative;
}

.flow-step {
  text-align: left;
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--primary-soft);
  transition: all 0.3s ease;
}

.flow-step:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(27,111,217,0.3);
}

.flow-step .step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 32px;
  border-radius: 100px;
  background: var(--primary-strong);
  color: #fff;
  font-size: 0.8rem;
  margin-bottom: 16px;
  padding: 0 12px;
  font-weight: 700;
}

.flow-step:nth-child(2) .step-badge { background: var(--accent); }
.flow-step:nth-child(3) .step-badge { background: #23A26D; }
.flow-step:nth-child(4) .step-badge { background: #6B5DD3; }

.flow-step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.flow-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ===== 数据证明 ===== */
.data-section {
  background:
    linear-gradient(rgba(246, 248, 251, 0.2), rgba(246, 248, 251, 0.2)),
    url('/assets/images/coverpic/cover-10.png');
  background-size: cover;
  background-position: center;
  position: relative;
}

.data-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.78) 0%, rgba(255,255,255,0.52) 100%);
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
  z-index: 2;
  gap: 20px;
  text-align: center;
}

.data-item {
  padding: 38px 20px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-card);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.data-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.data-num {
  font-size: clamp(1.9rem, 3.1vw, 2.7rem);
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.data-num em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--accent);
  font-weight: 700;
}

.data-label {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== CTA 内页横幅 ===== */
.cta-banner {
  border-radius: var(--radius-hero);
  background: linear-gradient(135deg, #1B6FD9 0%, #2265B8 100%, #0F4FA8 100%);
  padding: 44px 44px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: 0 16px 48px rgba(15,79,168,0.16);
}

.cta-banner::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 28px solid rgba(255,255,255,0.08);
  right: -60px;
  bottom: -60px;
}

.cta-banner::before {
  content: "";
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 18px solid rgba(255,255,255,0.06);
  right: 80px;
  top: -45px;
}

.cta-banner h2 {
  margin-bottom: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  margin-bottom: 0;
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 480px;
  position: relative;
  z-index: 2;
}

.cta-banner .cta-right {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.cta-btn {
  background: #fff;
  color: var(--primary-strong);
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15;
  transition: all 0.2s ease;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 19px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary:hover { color: var(--primary); }

.faq-item details { padding: 0; }

.faq-item details.open summary { color: var(--primary-strong); }

.faq-item [class*="-faq-plus"] {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--primary);
  transition: all 0.2s linear;
}

.faq-item details[open] .faq-chev {
  transform: rotate(45deg);
  border-color: var(--primary);
  background: var(--primary-soft);
}

.faq-item .faq-answer {
  padding: 0 2px 18px 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 联系转化 ===== */
.contact-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 64px 0 72px;
}

.contact-inner {
  background: var(--bg);
  border-radius: var(--radius-hero);
  padding: 40px;
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.contact-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.contact-card i {
  width: 44px;
  height: 44px;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  margin: 0 auto 14px;
  background: var(--primary-soft);
  color: var(--primary);
}

.contact-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== FOOTER 沿用首页 ===== */
.kai-footer {
  background: var(--surface);
  border-top: 1px solid var(--line);
  margin-top: auto;
}

.kai-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-top: 56px;
  padding-bottom: 40px;
}

.footer-brand {
  max-width: 380px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.brand-sub {
  display: block;
  margin-top: 12px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.footer-col h4 {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 9px;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  padding-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-bottom span:last-child {
  color: #98A7B5;
  font-size: 12px;
}

/* ===== Mobile Topbar ===== */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  width: 100%;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s;
}

.mobile-topbar .topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 14px 0 16px;
}

.hamburger-btn {
  border: none;
  background: none;
  color: var(--text-primary);
  font-size: 20px;
  padding: 12px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s;
}

.hamburger-btn:hover { background: var(--primary-soft); }

.mobile-logo {
  padding: 0;
}

.mobile-logo .logo-mark {
  width: 32px;
  height: 32px;
  font-size: 15px;
  margin-right: 0;
}

.mobile-drawer-mask {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(26,39,51,0.4);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.mobile-drawer-mask.show {
  opacity: 1;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(80vw, 300px);
  background: var(--surface);
  z-index: 99;
  transform: translateX(-100%);
  transition: transform 0.22s cubic-bezier(0.3, 0.6, 0.3, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 6px 0 22px rgba(26, 39, 51, 0.08);
}

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

.drawer-logo {
  padding: 18px 20px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 12px;
}

.drawer-logo .logo-mark {
  width: 34px;
  height: 34px;
  font-size: 16px;
}

.drawer-logo span {
  font-weight: 700;
  font-size: 17px;
}

.drawer-nav {
  flex: 1;
  padding: 0 12px;
}

/* 小徽章 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.8;
  border-radius: 32px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-weight: 500;
}

/* ===== 方案卡片列表 ===== */
.offering-section {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.offering-item {
  display: grid;
  grid-template-columns: 72px 1fr 240px;
  align-items: center;
  gap: 28px;
  padding: 24px 12px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}

.offering-item:last-child { border-bottom: none; }

.offering-item:hover { background: rgba(231, 240, 250, 0.35); border-radius: 16px; }

.offering-num {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.offering-title h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.offering-title p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.offering-tag-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.offering-link {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  transition: color 0.2s;
  display: block;
  padding: 8px 0;
}

.offering-link i { margin-right: 4px; }

/* ===== 分页条等不需要 ===== */
.clear { clear: both; }

/* 适应窄屏与大屏 */
@media screen and (min-width: 1280px) {
  .data-grid { gap: 26px; }
}

@media screen and (max-width: 1100px) {
  :root {
    --sidebar-w: 236px;
  }
  .logo-mark {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  .kai-container { padding: 0 24px; }
  .cat-hero { padding-top: 64px; }
  section { padding: 56px 0; }
  .contact-inner { gap: 16px; }
  .cta-banner { padding: 32px 28px; }
}

@media screen and (max-width: 1024px) {
  .kai-sidebar { display: none; }
  .mobile-topbar { display: block; }
  .kai-main { margin-left: 0; padding-top: 56px; }
  .kai-footer { margin-bottom: 0; }
  .flow-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .feature-block, .feature-block.reverse {
    gap: 32px;
  }
  .offering-item {
    grid-template-columns: 52px 1fr;
    gap: 12px 20px;
  }
  .offering-tag-wrap {
    grid-column: 2 / 3;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }
}

@media screen and (max-width: 768px) {
  .kai-container { padding: 0 18px; }
  .benefit-grid { grid-template-columns: 1fr; margin: 0; }
  .benefit-grid > *:first-child:last-child { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .data-item { padding: 18px 10px; }
  .feature-block {
    flex-direction: column;
    align-items: flex-start;
  }
  .feature-block.reverse {
    flex-direction: column;
    align-items: flex-start;
  }
  .feature-media { width: 100%; }
  .feature-media img {
    height: 220px;
  }
  .contact-inner { grid-template-columns: 1fr; }
  .cta-banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .flow-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .flow-step { padding: 22px; }
}

@media screen and (max-width: 640px) {
  .cat-hero h1 {
    margin-bottom: 14px;
  }
  .cat-hero p.subtitle {
    font-size: 1rem;
  }
  .section { padding: 44px 0; }
  .offering-item {
    grid-template-columns: 1fr;
    padding: 20px 12px;
  }
  .offering-tag-wrap {
    grid-column: auto;
    flex-direction: column;
    align-items: flex-start;
  }
  .btn { width: 100%; #accent { font-weight: normal; } }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-primary, .btn-outline {
    text-align: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .kai-footer .footer-grid {
    padding-top: 32px;
    padding-bottom: 24px;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media screen and (max-width: 440px) {
  .logo-text { font-size: 17px; }
  .cat-hero { padding: 44px 0 52px; }
  h1 { letter-spacing: 0.3px; }
  .json-ld { display: none; }
}

@media screen and (max-width: 360px) {
  .side-nav .nav-item { font-size: 14px; }
  .mobile-topbar .topbar-inner { padding: 0 8px 0 12px; }
}

/* focus 可访问性 */
:focus-visible {
  outline: 3px solid rgba(27,111,217,0.25);
  outline-offset: 4px;
  border-radius: 4px;
}

/* 覆盖 Foundation 的 button 默认样式 */
button.btn {
  font-weight: 600;
}

input:focus {
  box-shadow: none;
  outline: 3px solid rgba(27,111,217,0.25);
}

@media print {
  .kai-sidebar {
    display: none;
    visibility: hidden;
  }
  .mobile-topbar { display: none; }
  .kai-main { margin-left: 0; }
  .kai-footer { border-top: 1px solid #999; }
}