/* roulang page: index */
:root {
            --bg-base: #0b1118;
            --bg-surface: #131c26;
            --bg-card: #1a2532;
            --border-color: #273748;
            --border-highlight: #3b4e63;
            --text-primary: #ffffff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --accent-green: #00e599;
            --accent-green-glow: rgba(0, 229, 153, 0.25);
            --accent-red: #ff4655;
            --accent-blue: #00b4d8;
            --container-width: 1240px;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 14px;
            --font-main: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Oswald', 'Chakra Petch', sans-serif;
            --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            background-color: var(--bg-base);
            color: var(--text-primary);
        }

        body {
            font-family: var(--font-main);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        /* 顶部通栏导航 */
        .header-wrap {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 17, 24, 0.88);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-meta-bar {
            background: #080d13;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 12px;
            color: var(--text-muted);
            padding: 6px 0;
        }

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

        .top-status-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-green);
        }

        .pulse-dot {
            width: 7px;
            height: 7px;
            background: var(--accent-green);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent-green);
            animation: pulseGlow 1.8s infinite;
        }

        @keyframes pulseGlow {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.85); }
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: #ffffff;
        }

        .brand-icon-box {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-green), #009e66);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0b1118;
            font-size: 18px;
        }

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

        .nav-link-item a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .nav-link-item a:hover {
            color: var(--accent-green);
        }

        .header-cta-btn {
            background: var(--accent-green);
            color: #0b1118;
            font-size: 14px;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .header-cta-btn:hover {
            background: #14ffad;
            box-shadow: 0 0 16px var(--accent-green-glow);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
        }

        /* 通用板块与排版 */
        .section-block {
            padding: 88px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-surface);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-light-contrast {
            background-color: #f1f5f9;
            color: #0f172a;
            border-top: 1px solid #cbd5e1;
            border-bottom: 1px solid #cbd5e1;
        }

        .section-light-contrast .section-header-title {
            color: #0f172a;
        }

        .section-light-contrast .section-header-desc {
            color: #475569;
        }

        .section-header {
            margin-bottom: 56px;
        }

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

        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-green);
            background: rgba(0, 229, 153, 0.1);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            border: 1px solid rgba(0, 229, 153, 0.2);
        }

        .section-header-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.5px;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .section-header-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 1. Hero 帮助搜索中心样式 */
        .hero-doc-center {
            margin-top: 104px;
            padding: 96px 0 80px;
            position: relative;
            background: linear-gradient(180deg, rgba(11, 17, 24, 0.8) 0%, rgba(19, 28, 38, 0.95) 100%),
                        url('/assets/images/3c52539520314874.jpg') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

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

        .hero-main-title {
            font-size: 46px;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -1px;
            color: #ffffff;
        }

        .hero-main-title span {
            color: var(--accent-green);
        }

        .hero-lead-text {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            line-height: 1.85;
            max-width: 820px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-search-wrapper {
            position: relative;
            max-width: 660px;
            margin: 0 auto 28px;
        }

        .hero-search-input {
            width: 100%;
            height: 60px;
            background: rgba(19, 28, 38, 0.95);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0 160px 0 24px;
            font-size: 16px;
            color: #fff;
            outline: none;
            transition: var(--transition);
        }

        .hero-search-input:focus {
            border-color: var(--accent-green);
            box-shadow: 0 0 20px var(--accent-green-glow);
        }

        .hero-search-btn {
            position: absolute;
            right: 8px;
            top: 8px;
            height: 44px;
            padding: 0 26px;
            background: var(--accent-green);
            color: #0b1118;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }

        .hero-search-btn:hover {
            background: #14ffad;
        }

        .hero-chips-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        .chips-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .hero-chip-item {
            font-size: 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 4px 14px;
            border-radius: 20px;
            transition: var(--transition);
        }

        .hero-chip-item:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
        }

        /* 2. 痛点板块 */
        .pain-points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            position: relative;
        }

        .pain-card-icon {
            font-size: 26px;
            color: var(--accent-red);
            margin-bottom: 18px;
        }

        .pain-card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #ffffff;
        }

        .pain-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 3. 解决方案架构板块 */
        .solution-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .solution-content-block {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .solution-feature-row {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .solution-feature-row i {
            color: var(--accent-green);
            font-size: 20px;
            margin-top: 4px;
        }

        .solution-media-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .solution-media-cover img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .solution-tag-overlay {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(11, 17, 24, 0.85);
            backdrop-filter: blur(8px);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-highlight);
        }

        /* 4. 核心指标看板 (#metrics) */
        .metrics-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-item-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            padding: 30px 24px;
            border-radius: var(--radius-md);
            text-align: center;
        }

        .metric-num-val {
            font-family: var(--font-num);
            font-size: 44px;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .metric-sub-label {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

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

        /* 5. 核心优势网格 (#advantage) */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .adv-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition);
        }

        .adv-card:hover {
            border-color: var(--accent-green);
            transform: translateY(-4px);
        }

        .adv-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }

        .adv-icon-badge {
            width: 48px;
            height: 48px;
            background: rgba(0, 229, 153, 0.08);
            border: 1px solid rgba(0, 229, 153, 0.2);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-green);
        }

        .adv-index-num {
            font-family: var(--font-num);
            font-size: 20px;
            color: var(--text-muted);
        }

        .adv-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

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

        /* 6. 场景演示 */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-card {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .scenario-img-wrap {
            height: 200px;
            overflow: hidden;
        }

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

        .scenario-card:hover .scenario-img-wrap img {
            transform: scale(1.05);
        }

        .scenario-content {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .scenario-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .scenario-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .scenario-meta-tag {
            margin-top: auto;
            font-size: 12px;
            color: var(--accent-blue);
            font-weight: 600;
        }

        /* 7. 算法理念与架构闭环 (#cases) */
        .pipeline-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .pipeline-step {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            position: relative;
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 32px;
            color: var(--accent-green);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

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

        /* 8. 结果对比卡片区 (#benchmark) */
        .benchmark-table-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .benchmark-col {
            border-radius: var(--radius-md);
            padding: 36px 30px;
            border: 1px solid var(--border-color);
        }

        .benchmark-col.traditional {
            background: #141b22;
        }

        .benchmark-col.ai-driven {
            background: #152427;
            border-color: rgba(0, 229, 153, 0.4);
            position: relative;
        }

        .benchmark-col-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .benchmark-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .benchmark-list-item {
            font-size: 14px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .benchmark-list-item i {
            margin-top: 4px;
        }

        /* 9. 优惠与授权接入阶梯（版式蓝图硬性组件） */
        .pricing-wall-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .tier-card {
            background: #ffffff;
            color: #0f172a;
            border-radius: var(--radius-md);
            padding: 36px 28px;
            display: flex;
            flex-direction: column;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
        }

        .tier-card.featured {
            border: 2px solid #00e599;
            box-shadow: 0 8px 30px rgba(0, 229, 153, 0.15);
            position: relative;
        }

        .tier-name {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .tier-price {
            font-family: var(--font-num);
            font-size: 34px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 16px;
        }

        .tier-desc {
            font-size: 14px;
            color: #64748b;
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .tier-spec-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 30px;
            flex-grow: 1;
        }

        .tier-spec-list li {
            font-size: 13px;
            color: #334155;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .tier-btn {
            padding: 12px 0;
            text-align: center;
            font-weight: 700;
            border-radius: var(--radius-sm);
            background: #0f172a;
            color: #fff;
            transition: var(--transition);
        }

        .tier-card.featured .tier-btn {
            background: #00c785;
            color: #0b1118;
        }

        /* 10. 资讯动态摘要 (#news) */
        .news-digest-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-digest-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            flex-direction: column;
        }

        .news-digest-date {
            font-size: 12px;
            color: var(--accent-green);
            margin-bottom: 8px;
            font-family: var(--font-num);
        }

        .news-digest-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .news-digest-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .news-anchor-jump {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-anchor-jump:hover {
            color: var(--accent-green);
        }

        /* 11. 平台合规保障条 (#trust) */
        .trust-strip-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .trust-pill-box {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .trust-pill-icon {
            font-size: 28px;
            color: var(--accent-green);
        }

        .trust-pill-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }

        .trust-pill-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 12. 转化与对接通道 (#contact) */
        .contact-form-container {
            max-width: 840px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 44px 40px;
        }

        .contact-form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group-item {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-item.full {
            grid-column: span 2;
        }

        .form-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .form-input-field, .form-select-field, .form-textarea-field {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: #fff;
            font-size: 14px;
            outline: none;
            width: 100%;
        }

        .form-input-field:focus, .form-select-field:focus, .form-textarea-field:focus {
            border-color: var(--accent-green);
        }

        .form-textarea-field {
            height: 100px;
            resize: vertical;
        }

        .form-submit-btn {
            width: 100%;
            height: 52px;
            background: var(--accent-green);
            color: #0b1118;
            font-size: 16px;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }

        .form-submit-btn:hover {
            background: #14ffad;
            box-shadow: 0 0 20px var(--accent-green-glow);
        }

        /* 统一页脚 */
        .footer-main {
            background: #080d13;
            border-top: 1px solid var(--border-color);
            padding: 72px 0 28px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-cols-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand-title {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand-p {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .footer-list-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-nav-list a:hover {
            color: var(--accent-green);
        }

        .footer-bottom-bar {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .pain-points-grid,
            .advantage-grid,
            .scenario-grid,
            .pricing-wall-grid,
            .news-digest-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pipeline-wrap,
            .metrics-strip,
            .trust-strip-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-cols-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links, .header-cta-btn {
                display: none;
            }
            .hero-main-title {
                font-size: 32px;
            }
            .hero-search-wrapper {
                margin-bottom: 20px;
            }
            .hero-search-input {
                padding: 0 16px;
                height: 52px;
            }
            .hero-search-btn {
                position: static;
                width: 100%;
                margin-top: 10px;
                height: 48px;
            }
            .solution-layout,
            .benchmark-table-box,
            .contact-form-grid {
                grid-template-columns: 1fr;
            }
            .pain-points-grid,
            .advantage-grid,
            .scenario-grid,
            .pricing-wall-grid,
            .news-digest-grid,
            .pipeline-wrap,
            .metrics-strip,
            .trust-strip-grid {
                grid-template-columns: 1fr;
            }
            .footer-cols-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom-bar {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .form-group-item.full {
                grid-column: span 1;
            }
            .contact-form-container {
                padding: 24px 18px;
            }
        }