/* roulang page: index */
:root {
            --bg-base: #060810;
            --bg-elevated: #0a0f1d;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.07);
            --primary: #0066ff;
            --primary-glow: #00d2ff;
            --accent-green: #00f090;
            --text-main: #ffffff;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-glass: rgba(255, 255, 255, 0.1);
            --border-glow: rgba(0, 210, 255, 0.35);
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-glow: 0 0 25px rgba(0, 102, 255, 0.35);
            --shadow-card: 0 16px 36px rgba(0, 0, 0, 0.45);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
        }

        body {
            background: radial-gradient(circle at 50% 10%, #101c38 0%, var(--bg-base) 65%);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部微型辅助栏与主导航 */
        .header-topbar {
            background: rgba(6, 8, 16, 0.95);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-dim);
            padding: 8px 0;
        }
        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .topbar-info span {
            margin-right: 20px;
        }
        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px var(--accent-green);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 15, 29, 0.85);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glass);
            transition: all 0.3s ease;
        }
        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: #fff;
        }
        .logo-symbol {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-glow));
            border-radius: 8px;
            display: grid;
            place-items: center;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 0 12px var(--primary);
        }
        .brand-logo small {
            font-size: 11px;
            display: block;
            color: var(--text-dim);
            font-weight: 400;
            line-height: 1;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }
        .nav-menu a {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 500;
            position: relative;
            padding: 6px 0;
        }
        .nav-menu a:hover, .nav-menu a.active {
            color: #fff;
        }
        .nav-menu a:hover::after, .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary-glow);
            border-radius: 2px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            min-height: 46px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            text-align: center;
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--primary), #0099ff);
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 102, 255, 0.45);
        }
        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 210, 255, 0.6);
            color: #fff;
        }
        .btn-outline {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
        }

        /* 统一 section 布局 */
        section {
            padding: 90px 0;
            position: relative;
        }
        .section-alt {
            background: rgba(10, 15, 29, 0.6);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .sec-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px;
        }
        .sec-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-green);
            background: rgba(0, 240, 144, 0.1);
            border: 1px solid rgba(0, 240, 144, 0.25);
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .sec-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 16px;
            color: #fff;
        }
        .sec-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 玻璃拟态卡片 */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(12px);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
        }

        /* 1. HERO：线索获客提问式首屏 */
        .hero-section {
            padding: 70px 0 90px;
            background-image: linear-gradient(180deg, rgba(6, 8, 16, 0.6) 0%, rgba(6, 8, 16, 0.95) 100%), url('/assets/images/f6ebe1a1aac3688b.png');
            background-size: cover;
            background-position: center;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 40px;
            align-items: center;
        }
        .hero-ask-tag {
            color: var(--primary-glow);
            font-weight: 600;
            font-size: 15px;
            display: inline-block;
            margin-bottom: 16px;
            letter-spacing: 0.8px;
        }
        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: #fff;
        }
        .hero-title span {
            background: linear-gradient(90deg, #fff, var(--primary-glow));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-lead {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .hero-features {
            display: flex;
            gap: 20px;
            margin-top: 24px;
            border-top: 1px solid var(--border-glass);
            padding-top: 20px;
        }
        .hero-f-item {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-f-item strong {
            color: #fff;
        }

        /* 首屏右侧获客表单 */
        .hero-form-box {
            background: rgba(10, 15, 29, 0.88);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 34px;
            box-shadow: 0 0 35px rgba(0, 102, 255, 0.25);
            backdrop-filter: blur(16px);
        }
        .form-heading {
            margin-bottom: 20px;
        }
        .form-heading h3 {
            font-size: 22px;
            color: #fff;
            margin-bottom: 6px;
        }
        .form-heading p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .field-group {
            margin-bottom: 16px;
        }
        .field-group label {
            display: block;
            font-size: 13px;
            margin-bottom: 6px;
            color: var(--text-muted);
        }
        .input-control, .select-control {
            width: 100%;
            height: 46px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            padding: 0 14px;
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s ease;
        }
        .input-control:focus, .select-control:focus {
            border-color: var(--primary-glow);
            box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
        }
        .select-control option {
            background: #0a0f1d;
            color: #fff;
        }
        .form-privacy-note {
            font-size: 12px;
            color: var(--text-dim);
            margin-top: 12px;
            line-height: 1.5;
            text-align: center;
        }

        /* 2. 客户案例 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-thumb {
            height: 190px;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 20px;
            position: relative;
        }
        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .glass-card:hover .case-thumb img {
            transform: scale(1.05);
        }
        .case-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(0, 0, 0, 0.7);
            border: 1px solid var(--border-glass);
            padding: 3px 10px;
            font-size: 12px;
            border-radius: 4px;
            color: var(--primary-glow);
        }
        .case-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #fff;
        }
        .case-text {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .case-impact {
            border-top: 1px solid var(--border-glass);
            padding-top: 14px;
            display: flex;
            justify-content: space-between;
            font-size: 13px;
        }
        .case-impact span {
            color: var(--accent-green);
            font-weight: 600;
        }

        /* 3. 结果数据条 */
        .milestones-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .milestone-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
        }
        .milestone-val {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }
        .milestone-val .accent {
            color: var(--accent-green);
        }
        .milestone-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 4. 前后对比 */
        .compare-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .compare-box {
            border-radius: var(--radius-md);
            padding: 36px;
            border: 1px solid var(--border-glass);
        }
        .compare-box.traditional {
            background: rgba(255, 255, 255, 0.02);
        }
        .compare-box.software {
            background: rgba(0, 102, 255, 0.07);
            border-color: var(--border-glow);
            box-shadow: 0 0 30px rgba(0, 102, 255, 0.2);
        }
        .compare-header {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .compare-list {
            list-style: none;
        }
        .compare-list li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 18px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .compare-box.traditional .compare-list li::before {
            content: "✕";
            position: absolute;
            left: 0;
            color: #ef4444;
            font-weight: 700;
        }
        .compare-box.software .compare-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--accent-green);
            font-weight: 700;
        }

        /* 5. 方法说明 (系统架构生态) */
        .ecosystem-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .ecosystem-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
        }
        .step-block {
            margin-bottom: 24px;
            display: flex;
            gap: 18px;
        }
        .step-num {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(0, 210, 255, 0.1);
            color: var(--primary-glow);
            border: 1px solid var(--border-glow);
            display: grid;
            place-items: center;
            font-weight: 700;
        }
        .step-info h4 {
            font-size: 17px;
            color: #fff;
            margin-bottom: 6px;
        }
        .step-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 6. 核心赋能优势 (6卡片) */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .matrix-icon {
            font-size: 26px;
            color: var(--primary-glow);
            margin-bottom: 16px;
        }
        .matrix-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #fff;
        }
        .matrix-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 7. 多场景解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .sol-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .sol-pic {
            height: 170px;
            overflow: hidden;
        }
        .sol-pic img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .sol-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .sol-title {
            font-size: 18px;
            color: #fff;
            margin-bottom: 10px;
        }
        .sol-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
            line-height: 1.6;
        }

        /* 8. 智能算法引擎 */
        .engine-panel {
            background: linear-gradient(135deg, rgba(0, 102, 255, 0.12) 0%, rgba(6, 8, 16, 0.95) 100%);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
        }
        .engine-flex {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        /* 9. 专家评价 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .quote-icon {
            font-size: 28px;
            color: var(--primary-glow);
            line-height: 1;
            margin-bottom: 12px;
        }
        .quote-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .user-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-glass);
            padding-top: 14px;
        }
        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid var(--border-glow);
            display: grid;
            place-items: center;
            font-weight: 700;
            color: #fff;
        }
        .user-name {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
        }
        .user-title {
            font-size: 12px;
            color: var(--text-dim);
        }

        /* 10. 资讯动态 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-item {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .news-date {
            font-size: 12px;
            color: var(--accent-green);
            margin-bottom: 8px;
        }
        .news-title {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.45;
        }
        .news-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
        }

        /* 11. 异议拆解与平台可靠性 (Security & Compliance) */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .security-item {
            text-align: center;
            padding: 26px 18px;
        }
        .sec-icon {
            font-size: 32px;
            margin-bottom: 14px;
            display: inline-block;
        }
        .sec-name {
            font-size: 16px;
            color: #fff;
            margin-bottom: 8px;
        }
        .sec-detail {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 12. FAQ 手风琴 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.25s ease;
        }
        .faq-item.active {
            border-color: var(--border-glow);
        }
        .faq-trigger {
            width: 100%;
            padding: 18px 22px;
            text-align: left;
            background: none;
            border: none;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        .faq-symbol {
            font-size: 18px;
            color: var(--primary-glow);
            transition: transform 0.25s ease;
        }
        .faq-item.active .faq-symbol {
            transform: rotate(45deg);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-item.active .faq-content {
            padding: 0 22px 20px;
            max-height: 200px;
        }

        /* 页脚 */
        .site-footer {
            background: #030408;
            border-top: 1px solid var(--border-glass);
            padding: 60px 0 30px;
            font-size: 14px;
            color: var(--text-dim);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h4 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .footer-col h5 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--primary-glow);
        }
        .footer-contact li {
            margin-bottom: 10px;
            color: var(--text-muted);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }
        .footer-bottom a {
            color: var(--text-dim);
            margin-left: 14px;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .ecosystem-row, .compare-wrap, .engine-flex {
                grid-template-columns: 1fr;
            }
            .matrix-grid, .solutions-grid, .cases-grid, .testimonials-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .milestones-strip, .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-topbar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #0a0f1d;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--border-glass);
                gap: 18px;
            }
            .nav-menu.show {
                display: flex;
            }
            .matrix-grid, .solutions-grid, .cases-grid, .testimonials-grid, .news-grid, .milestones-strip, .security-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 30px;
            }
            .sec-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }