/* roulang page: index */
:root {
            --primary: #0F2C59;
            --primary-dark: #071933;
            --primary-light: #1E3E6D;
            --accent: #FF5E1E;
            --accent-hover: #E04E14;
            --bg-main: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0B192C;
            --text-heading: #1E293B;
            --text-body: #475569;
            --text-muted: #94A3B8;
            --border-color: #E2E8F0;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(15, 44, 89, 0.08), 0 2px 4px -2px rgba(15, 44, 89, 0.04);
            --shadow-lg: 0 12px 24px -4px rgba(15, 44, 89, 0.12);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-main);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.75;
        }

        body {
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部通栏 */
        .top-bar {
            background-color: var(--primary-dark);
            color: #CBD5E1;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .top-info span {
            margin-right: 20px;
        }

        /* 导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: bold;
        }

        .nav-links {
            display: flex;
            gap: 28px;
            align-items: center;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-heading);
            padding: 6px 0;
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent);
        }

        .nav-cta {
            background: var(--accent);
            color: #fff !important;
            padding: 9px 20px !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 2px 6px rgba(255, 94, 30, 0.3);
        }

        .nav-cta:hover {
            background: var(--accent-hover) !important;
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--primary);
            cursor: pointer;
        }

        /* 公用按钮与版式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 94, 30, 0.25);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 94, 30, 0.35);
        }

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

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

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(255, 94, 30, 0.08);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 32px;
            color: var(--text-heading);
            margin-bottom: 16px;
            font-weight: 700;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
        }

        .section-padding {
            padding: 85px 0;
        }

        /* 倒计时秒杀栏 */
        .flash-bar {
            background: linear-gradient(90deg, #FF5E1E 0%, #FF8A00 100%);
            color: #fff;
            padding: 12px 0;
            font-size: 14px;
        }

        .flash-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        .flash-timer {
            display: inline-flex;
            gap: 8px;
            font-weight: bold;
        }

        .timer-box {
            background: rgba(0, 0, 0, 0.2);
            padding: 2px 8px;
            border-radius: 4px;
        }

        /* 板块 1: Hero 对比选型舞台 */
        .hero-section {
            background: linear-gradient(180deg, #F0F4F9 0%, #F8FAFC 100%);
            padding: 70px 0 90px 0;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto 45px auto;
        }

        .hero-title {
            font-size: 42px;
            color: var(--primary);
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .plan-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 35px 25px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            position: relative;
        }

        .plan-card.featured {
            border: 2px solid var(--accent);
            box-shadow: var(--shadow-lg);
            transform: translateY(-8px);
        }

        .plan-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }

        .plan-header {
            margin-bottom: 20px;
            text-align: center;
        }

        .plan-name {
            font-size: 20px;
            color: var(--text-heading);
            font-weight: 700;
            margin-bottom: 8px;
        }

        .plan-price {
            font-size: 32px;
            color: var(--primary);
            font-weight: 800;
        }

        .plan-price span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: normal;
        }

        .plan-features {
            list-style: none;
            margin: 20px 0 30px 0;
            flex-grow: 1;
        }

        .plan-features li {
            font-size: 14px;
            color: var(--text-body);
            padding: 8px 0;
            border-bottom: 1px dashed #EDF2F7;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 板块 2: 品牌故事与产品定位 */
        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .story-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .story-metrics-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(15, 44, 89, 0.9);
            color: #fff;
            padding: 15px 20px;
            border-radius: var(--radius-md);
            backdrop-filter: blur(5px);
        }

        .badge-value {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
        }

        .badge-label {
            font-size: 12px;
            color: #CBD5E1;
        }

        /* 板块 3: 系列导航与核心优势 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .adv-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

        .adv-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: #CBD5E1;
        }

        .adv-icon {
            font-size: 28px;
            margin-bottom: 18px;
            display: inline-block;
        }

        .adv-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }

        .adv-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 板块 4: 爆款网格与核心功能套件 */
        .modules-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .module-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .module-img-box {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .module-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .module-card:hover .module-img-box img {
            transform: scale(1.05);
        }

        .module-body {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .module-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
        }

        .module-list {
            list-style: none;
            margin: 15px 0;
            font-size: 14px;
            color: var(--text-body);
        }

        .module-list li {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 板块 5: 技术架构与技术壁垒 (深色背景) */
        .tech-section {
            background-color: var(--bg-dark);
            color: #E2E8F0;
            position: relative;
        }

        .tech-section .section-title {
            color: #FFFFFF;
        }

        .tech-section .section-subtitle {
            color: #94A3B8;
        }

        .tech-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .tech-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 30px 20px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: var(--transition);
        }

        .tech-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
        }

        .tech-stat {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 10px;
        }

        .tech-name {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 8px;
        }

        .tech-desc {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 板块 6: 场景演示与业务流矩阵 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px;
            transition: var(--transition);
        }

        .scenario-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .scenario-tag {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            background: #EDF2F7;
            padding: 3px 8px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 12px;
        }

        .scenario-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .scenario-desc {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* 板块 7: 客户故事与案例落地 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .case-img-box {
            height: 180px;
            overflow: hidden;
        }

        .case-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-content {
            padding: 25px;
        }

        .case-company {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .case-results {
            background: #F1F5F9;
            padding: 12px;
            border-radius: var(--radius-sm);
            margin: 15px 0;
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
        }

        .case-quote {
            font-size: 13px;
            color: var(--text-body);
            font-style: italic;
            line-height: 1.6;
        }

        /* 板块 8: 关键业务数据条 (Metric Bar) */
        .metric-band {
            background: var(--primary);
            color: #fff;
            padding: 50px 0;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .metric-num {
            font-size: 40px;
            font-weight: 800;
            color: #FF8A00;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 15px;
            color: #E2E8F0;
        }

        /* 板块 9: 口碑评价墙 (Testimonials) */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }

        .review-stars {
            color: #FF5E1E;
            margin-bottom: 12px;
            font-size: 16px;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .reviewer-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .reviewer-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-heading);
        }

        .reviewer-org {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 板块 10: 会员权益与保障条 */
        .guarantee-bar {
            background: #FFF7ED;
            border-top: 1px solid #FFEDD5;
            border-bottom: 1px solid #FFEDD5;
            padding: 30px 0;
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .guarantee-title {
            font-size: 16px;
            font-weight: 700;
            color: #9A3412;
            margin-bottom: 4px;
        }

        .guarantee-desc {
            font-size: 13px;
            color: #C2410C;
        }

        /* 板块 11: 行业资讯与分销动态 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .news-content {
            padding: 20px;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .news-summary {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 板块 12: 常见问题手风琴 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 15px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            user-select: none;
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            font-size: 14px;
            color: var(--text-body);
            background: #FAFAFA;
            line-height: 1.8;
        }

        .faq-item.active .faq-answer {
            padding: 16px 24px 24px 24px;
            max-height: 250px;
        }

        .faq-icon {
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* 板块 13: 进店入口与免费预约演示 */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #153E77 100%);
            color: #fff;
            padding: 70px 0;
        }

        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .cta-text h2 {
            font-size: 32px;
            margin-bottom: 16px;
            font-weight: 800;
        }

        .cta-text p {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .cta-form {
            background: #fff;
            padding: 30px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            color: var(--text-heading);
        }

        .form-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--primary);
            text-align: center;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 94, 30, 0.15);
        }

        /* 统一页脚 */
        .site-footer {
            background: var(--primary-dark);
            color: #94A3B8;
            padding: 60px 0 30px 0;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: #FFFFFF;
            font-size: 20px;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .footer-brand p {
            line-height: 1.8;
            font-size: 13px;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 15px;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 25px;
            text-align: center;
            font-size: 12px;
            color: #64748B;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-grid, .advantages-grid, .modules-grid, .cases-grid, .reviews-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tech-grid, .scenarios-grid, .metric-grid, .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-lg);
                gap: 15px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.show {
                display: flex;
            }
            .hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .story-grid, .cta-inner {
                grid-template-columns: 1fr;
            }
            .hero-grid, .advantages-grid, .modules-grid, .cases-grid, .reviews-grid, .news-grid, .tech-grid, .scenarios-grid, .metric-grid, .guarantee-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .plan-card.featured {
                transform: none;
            }
        }