/* roulang page: index */
:root {
            --brand-primary: #00E575;
            --brand-primary-hover: #00c865;
            --brand-dark: #111317;
            --brand-secondary: #1E2229;
            --brand-accent: #FF6B00;
            --brand-bg-light: #F6F8FA;
            --brand-bg-dark: #0B0D0F;
            --text-heading: #111827;
            --text-body: #374151;
            --text-muted: #6B7280;
            --border-color: #E5E7EB;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 12px 30px rgba(0, 229, 117, 0.16);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-stack);
            color: var(--text-body);
            background-color: #FFFFFF;
            line-height: 1.75;
            letter-spacing: -0.01em;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

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

        /* 顶部通告栏 */
        .top-info-bar {
            background-color: var(--brand-dark);
            color: #D1D5DB;
            font-size: 0.85rem;
            padding: 7px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .badge-live {
            background-color: rgba(0, 229, 117, 0.15);
            color: var(--brand-primary);
            border: 1px solid var(--brand-primary);
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 20px;
        }

        /* 导航头 */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
            border-bottom: 1px solid var(--border-color);
        }

        .navbar-brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--brand-dark);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .navbar-brand-logo i {
            color: var(--brand-primary);
            font-size: 1.7rem;
        }

        .nav-link {
            font-weight: 600;
            font-size: 0.95rem;
            color: #1F2937 !important;
            padding: 0.5rem 0.9rem !important;
            border-radius: 6px;
        }

        .nav-link:hover {
            color: var(--brand-primary-hover) !important;
        }

        .btn-brand-cta {
            background-color: var(--brand-primary);
            color: #052e16;
            font-weight: 700;
            border-radius: 8px;
            padding: 8px 22px;
            border: 1px solid var(--brand-primary);
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-brand-cta:hover {
            background-color: var(--brand-primary-hover);
            color: #021e0e;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 229, 117, 0.35);
        }

        .btn-brand-secondary {
            background-color: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.25);
            font-weight: 600;
            border-radius: 8px;
            padding: 8px 22px;
        }

        .btn-brand-secondary:hover {
            background-color: #FFFFFF;
            color: var(--brand-dark);
        }

        .btn-accent {
            background-color: var(--brand-accent);
            color: #FFFFFF;
            font-weight: 700;
            border-radius: 8px;
            padding: 8px 20px;
            border: none;
        }

        .btn-accent:hover {
            background-color: #e05e00;
            color: #FFFFFF;
        }

        /* 统一容器与间距 */
        .container {
            max-width: 1240px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 50px;
        }

        .section-tag {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--brand-primary-hover);
            background: rgba(0, 229, 117, 0.12);
            padding: 4px 12px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.15rem;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 780px;
            margin-bottom: 0;
            line-height: 1.8;
        }

        /* Hero 裂变邀请首屏容器 */
        .hero-section {
            background: linear-gradient(135deg, rgba(11, 13, 15, 0.92) 0%, rgba(17, 19, 23, 0.88) 100%),
                        url('/assets/images/4d51c1e744f08596.jpg') center/cover no-repeat;
            color: #FFFFFF;
            padding: 85px 0 95px;
            position: relative;
        }

        .hero-section h1 {
            color: #FFFFFF;
            font-size: 2.85rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .hero-lead {
            font-size: 1.15rem;
            color: #D1D5DB;
            line-height: 1.85;
            margin-bottom: 30px;
        }

        .fission-dashboard-card {
            background: rgba(30, 34, 41, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            backdrop-filter: blur(10px);
            padding: 32px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
        }

        .progress-slot {
            background: rgba(255, 255, 255, 0.1);
            height: 14px;
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .progress-fill {
            background: linear-gradient(90deg, #00E575, #FF6B00);
            height: 100%;
            width: 74%;
            border-radius: 20px;
        }

        /* 卡片基础系统 */
        .feature-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 32px 26px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 229, 117, 0.5);
        }

        .card-icon-box {
            width: 54px;
            height: 54px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 20px;
            background: rgba(0, 229, 117, 0.12);
            color: #058f48;
        }

        .card-accent-border {
            border-top: 4px solid var(--brand-accent);
        }

        .card-primary-border {
            border-top: 4px solid var(--brand-primary);
        }

        /* 痛点对比卡 */
        .pain-contrast-card {
            background: #FFFFFF;
            border-radius: 14px;
            border: 1px solid #FED7AA;
            padding: 28px;
            box-shadow: 0 4px 15px rgba(255, 107, 0, 0.05);
            height: 100%;
        }

        .pain-badge {
            background: #FFF7ED;
            color: #C2410C;
            font-weight: 700;
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 6px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-bottom: 12px;
        }

        .resolved-badge {
            background: #ECFDF5;
            color: #047857;
            font-weight: 700;
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 6px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-bottom: 12px;
        }

        /* 流程步骤 */
        .step-num-bubble {
            width: 44px;
            height: 44px;
            background: var(--brand-dark);
            color: var(--brand-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.15rem;
            margin-bottom: 18px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        /* 算法与深色板块 */
        .dark-tech-section {
            background-color: var(--brand-bg-dark);
            color: #E5E7EB;
            position: relative;
        }

        .dark-tech-section h2, .dark-tech-section h3, .dark-tech-section h4 {
            color: #FFFFFF;
        }

        .dark-card {
            background: #15191F;
            border: 1px solid #2A303C;
            border-radius: 12px;
            padding: 28px;
            height: 100%;
        }

        .dark-card:hover {
            border-color: var(--brand-primary);
        }

        /* 数据条 */
        .metric-counter {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--brand-primary);
            line-height: 1;
            margin-bottom: 8px;
        }

        /* 产品套餐推荐 */
        .pricing-card.featured {
            border: 2px solid var(--brand-primary);
            transform: scale(1.03);
            box-shadow: 0 14px 34px rgba(0, 229, 117, 0.2);
            position: relative;
            z-index: 2;
        }

        .featured-ribbon {
            position: absolute;
            top: 0;
            right: 0;
            background: var(--brand-primary);
            color: #064e3b;
            font-weight: 800;
            font-size: 0.75rem;
            padding: 4px 14px;
            border-bottom-left-radius: 8px;
        }

        /* 排行榜裂变条目 */
        .rank-badge {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.85rem;
        }

        .rank-1 { background: #FFD700; color: #78350F; }
        .rank-2 { background: #E2E8F0; color: #334155; }
        .rank-3 { background: #FBD38D; color: #744210; }

        /* 手风琴问答 */
        .accordion-item {
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            border-radius: 10px !important;
            overflow: hidden;
        }

        .accordion-button {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-heading);
            background-color: #FFFFFF;
            padding: 18px 24px;
        }

        .accordion-button:not(.collapsed) {
            color: #065f46;
            background-color: #F0FDF4;
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--brand-primary);
        }

        /* 表单与输入框 */
        .form-control, .form-select {
            border-radius: 8px;
            padding: 12px 16px;
            border: 1px solid #D1D5DB;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 3px rgba(0, 229, 117, 0.2);
        }

        /* 底部 */
        .main-footer {
            background-color: #090B0D;
            color: #9CA3AF;
            padding: 70px 0 25px;
            border-top: 1px solid #1F2937;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #FFFFFF;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
        }

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

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

        .footer-nav-list a:hover {
            color: var(--brand-primary);
        }

        .back-to-top-btn {
            position: fixed;
            bottom: 26px;
            right: 26px;
            width: 44px;
            height: 44px;
            background: var(--brand-dark);
            color: var(--brand-primary);
            border: 1px solid rgba(0, 229, 117, 0.3);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 999;
            box-shadow: 0 6px 18px rgba(0,0,0,0.3);
        }

        .back-to-top-btn:hover {
            background: var(--brand-primary);
            color: #064e3b;
        }

        @media (max-width: 991px) {
            .hero-section h1 {
                font-size: 2.15rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .pricing-card.featured {
                transform: scale(1);
            }
        }