/* roulang page: index */
:root {
            --bg-base: #0B0E14;
            --bg-surface: #151B26;
            --bg-elevated: #1D2433;
            --color-primary: #00F298;
            --color-primary-hover: #00d885;
            --color-accent: #00D8F6;
            --color-warning: #FF9F1C;
            --text-main: #E6EDF3;
            --text-muted: #8B949E;
            --text-dark: #0B0E14;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(0, 242, 152, 0.3);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
            --radius-box: 6px;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 min(5vw, 32px);
        }

        /* 顶部辅助条 */
        .top-subbar {
            background: #06080B;
            border-bottom: 1px solid var(--border-dim);
            font-size: 13px;
            color: var(--text-muted);
            padding: 8px 0;
        }
        .top-subbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
            box-shadow: 0 0 8px var(--color-primary);
            margin-right: 6px;
        }

        /* 主导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 14, 20, 0.88);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo span {
            color: var(--color-primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }
        .nav-links a {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--color-primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-box);
            cursor: pointer;
            transition: all 0.25s ease;
            min-height: 44px;
            min-width: 44px;
            border: 1px solid transparent;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: var(--text-dark);
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            box-shadow: 0 0 16px rgba(0, 242, 152, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border-color: var(--border-dim);
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* 移动端菜单切换 */
        .mobile-menu-btn {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }

        /* Section 通用规范 */
        .section-block {
            padding: 96px 0;
            border-bottom: 1px solid var(--border-dim);
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-surface);
        }
        .section-header {
            margin-bottom: 56px;
            max-width: 800px;
        }
        .section-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--color-primary);
            margin-bottom: 12px;
            font-family: var(--font-mono);
        }
        .section-title {
            font-size: clamp(26px, 3.2vw, 36px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. HERO BANNER */
        .hero-section {
            position: relative;
            padding: 120px 0 100px;
            background-image: linear-gradient(135deg, rgba(11, 14, 20, 0.95) 0%, rgba(11, 14, 20, 0.8) 100%), url('/assets/images/8cac924cafb58165.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-dim);
            overflow: hidden;
        }
        .hero-clip-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 48%;
            height: 100%;
            background: linear-gradient(120deg, rgba(0, 242, 152, 0.04) 0%, rgba(0, 216, 246, 0.08) 100%);
            clip-path: polygon(25% 0%, 100% 0%, 100% 100%, 0% 100%);
            pointer-events: none;
        }
        .hero-content {
            max-width: 820px;
            position: relative;
            z-index: 2;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 4px;
            background: rgba(0, 242, 152, 0.1);
            border: 1px solid var(--border-highlight);
            color: var(--color-primary);
            font-size: 13px;
            font-family: var(--font-mono);
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: clamp(34px, 4.5vw, 52px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: #ffffff;
            margin-bottom: 24px;
        }
        .hero-title span {
            color: var(--color-primary);
        }
        .hero-lead {
            font-size: 17px;
            line-height: 1.75;
            color: var(--text-muted);
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* 2. SECURITY PAIN POINTS */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .pain-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s, border-color 0.25s;
        }
        .pain-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 159, 28, 0.4);
        }
        .pain-badge {
            color: var(--color-warning);
            font-size: 13px;
            font-weight: 700;
            font-family: var(--font-mono);
            margin-bottom: 12px;
            display: inline-block;
        }
        .pain-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: #fff;
        }
        .pain-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 3. PRODUCT ARCHITECTURE */
        .arch-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .arch-visual {
            background: var(--bg-elevated);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .arch-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .arch-item {
            padding: 20px;
            background: var(--bg-base);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            border-left: 3px solid var(--color-accent);
        }
        .arch-item h4 {
            font-size: 17px;
            color: #fff;
            margin-bottom: 6px;
        }
        .arch-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 4. CORE ADVANTAGES */
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--bg-base);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 28px;
            position: relative;
            transition: all 0.25s ease;
        }
        .adv-card:hover {
            border-color: var(--border-highlight);
            transform: translateY(-3px);
            background: #111722;
        }
        .adv-code {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--color-primary);
            margin-bottom: 12px;
            display: block;
        }
        .adv-card h3 {
            font-size: 19px;
            color: #fff;
            margin-bottom: 12px;
        }
        .adv-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 5. HOT PRODUCTS */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .prod-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 36px 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            box-shadow: var(--shadow-card);
        }
        .prod-card.featured {
            border-color: var(--color-primary);
            background: linear-gradient(180deg, #182230 0%, var(--bg-surface) 100%);
        }
        .prod-flag {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--color-primary);
            color: var(--text-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 4px;
            font-family: var(--font-mono);
        }
        .prod-header h3 {
            font-size: 22px;
            color: #fff;
            margin-bottom: 8px;
        }
        .prod-header p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .prod-features {
            list-style: none;
            margin-bottom: 32px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .prod-features li {
            font-size: 14px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .prod-features li::before {
            content: "✓";
            color: var(--color-primary);
            font-weight: bold;
        }

        /* 6. DARK PHILOSOPHY */
        .philosophy-wrap {
            background: radial-gradient(circle at 50% 50%, #16202e 0%, var(--bg-base) 100%);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 60px 48px;
        }
        .philo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 32px;
            margin-top: 40px;
        }
        .philo-item {
            border-left: 2px solid var(--color-accent);
            padding-left: 20px;
        }
        .philo-item h4 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 8px;
        }
        .philo-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 7. DEPLOYMENT FLOW */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .flow-step {
            background: var(--bg-base);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 24px;
            position: relative;
        }
        .flow-num {
            font-size: 32px;
            font-family: var(--font-mono);
            font-weight: 800;
            color: rgba(255, 255, 255, 0.1);
            margin-bottom: 12px;
        }
        .flow-step h3 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 8. CLIENT STORIES */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .case-thumb {
            height: 180px;
            overflow: hidden;
        }
        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-thumb img {
            transform: scale(1.05);
        }
        .case-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .case-tag {
            font-size: 12px;
            color: var(--color-primary);
            font-family: var(--font-mono);
            margin-bottom: 8px;
        }
        .case-body h3 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 10px;
        }
        .case-body p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .case-stat {
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-dim);
            font-size: 14px;
            color: var(--color-accent);
            font-family: var(--font-mono);
            font-weight: 600;
        }

        /* 9. KEY METRICS */
        .metrics-bar {
            background: #07090D;
            border-top: 1px solid var(--border-dim);
            border-bottom: 1px solid var(--border-dim);
            padding: 48px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .metric-val {
            font-family: var(--font-mono);
            font-size: clamp(32px, 3.5vw, 44px);
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* 10. USER ENDORSEMENTS */
        .endorse-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }
        .endorse-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 32px;
        }
        .endorse-quote {
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .endorse-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--border-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-weight: bold;
            color: var(--color-primary);
            border: 1px solid var(--border-highlight);
        }
        .author-info h4 {
            font-size: 15px;
            color: #fff;
        }
        .author-info p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 11. SECURITY INSIGHTS */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .insight-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            padding: 24px;
            transition: border-color 0.25s;
        }
        .insight-card:hover {
            border-color: var(--color-accent);
        }
        .insight-meta {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: flex;
            justify-content: space-between;
        }
        .insight-card h3 {
            font-size: 17px;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .insight-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 12. INTERACTIVE FAQ */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            overflow: hidden;
            transition: border-color 0.25s;
        }
        .faq-item.active {
            border-color: var(--color-primary);
        }
        .faq-trigger {
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            border: none;
            color: #fff;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        .faq-icon {
            font-family: var(--font-mono);
            font-size: 18px;
            color: var(--color-primary);
            transition: transform 0.25s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-content {
            padding: 0 24px 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-content {
            display: block;
        }

        /* 底部转化区 */
        .cta-strip {
            background: linear-gradient(135deg, #0c1c24 0%, var(--bg-base) 100%);
            border-top: 1px solid var(--border-dim);
            padding: 80px 0;
            text-align: center;
        }
        .cta-box {
            max-width: 760px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: clamp(26px, 3.5vw, 40px);
            color: #fff;
            margin-bottom: 16px;
            font-weight: 800;
        }
        .cta-desc {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }
        .cta-input {
            flex-grow: 1;
            padding: 12px 16px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-box);
            color: #fff;
            outline: none;
        }
        .cta-input:focus {
            border-color: var(--color-primary);
        }

        /* 页脚规范 */
        .site-footer {
            background: #06080B;
            border-top: 1px solid var(--border-dim);
            padding: 60px 0 32px;
            color: var(--text-muted);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 20px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col h5 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            padding-top: 32px;
            border-top: 1px solid var(--border-dim);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .adv-grid,
            .product-grid,
            .cases-grid,
            .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .arch-layout {
                grid-template-columns: 1fr;
            }
            .hero-clip-bg {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: var(--bg-surface);
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--border-dim);
                gap: 16px;
            }
            .nav-links.active {
                display: flex;
            }
            .top-subbar {
                display: none;
            }
            .adv-grid,
            .product-grid,
            .cases-grid,
            .insights-grid,
            .flow-grid,
            .metrics-grid,
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-form {
                flex-direction: column;
            }
        }