/* roulang page: index */
:root {
            --primary: #1A56DB;
            --primary-hover: #1E40AF;
            --accent: #F59E0B;
            --accent-hover: #FBBF24;
            --bg: #F8FAFC;
            --dark-bg: #0F172A;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-light: #F1F5F9;
            --success: #10B981;
            --danger: #EF4444;
            --card-bg: #FFFFFF;
            --border: #E2E8F0;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-glow: 0 0 20px rgba(26,86,219,0.15);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-mono: "SF Mono", "Menlo", "Monaco", monospace;
            --max-width: 1280px;
            --header-height: 72px;
            --header-height-mobile: 56px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        a:hover { color: var(--primary); }

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

        button, input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

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

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1000;
            width: 100%;
            height: var(--header-height);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            font-weight: 700;
            font-size: 22px;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo span.highlight {
            color: var(--primary);
        }
        .logo a {
            color: var(--text);
        }
        .logo a:hover {
            color: var(--text);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 0;
            position: relative;
            transition: color 0.2s;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .header-cta {
            background: var(--accent);
            color: var(--text) !important;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 14px;
            transition: background 0.2s, transform 0.2s;
            display: inline-block;
            white-space: nowrap;
        }
        .header-cta:hover {
            background: var(--accent-hover);
            transform: scale(1.02);
            color: var(--text) !important;
        }

        /* Mobile menu toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 640px) {
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100vh;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                justify-content: center;
                gap: 24px;
                transform: translateY(-100%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.35s ease;
                z-index: 1000;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links a {
                font-size: 20px;
            }
            .header-cta.desktop-only {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .site-header {
                height: var(--header-height-mobile);
            }
            .header-inner {
                height: var(--header-height-mobile);
            }
        }
        @media (min-width: 641px) {
            .mobile-toggle { display: none; }
            .nav-links { display: flex !important; opacity: 1 !important; transform: none !important; position: static; height: auto; background: none; flex-direction: row; }
        }

        /* Hero Section */
        .hero {
            padding-top: calc(var(--header-height) + 48px);
            padding-bottom: 64px;
            background-color: var(--bg);
            background-image: 
                linear-gradient(135deg, rgba(26,86,219,0.03) 0%, transparent 50%),
                radial-gradient(circle at 85% 20%, rgba(245,158,11,0.06) 0%, transparent 40%);
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            right: -100px;
            top: 20%;
            width: 600px;
            height: 600px;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center;
            background-size: contain;
            opacity: 0.08;
            pointer-events: none;
            z-index: 0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-text h1 {
            font-size: 48px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text);
            margin-bottom: 20px;
        }
        .hero-text p {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 480px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
            text-align: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-ghost {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-ghost:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--text);
            font-weight: 700;
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            transform: scale(1.02);
            color: var(--text);
        }
        .hero-cards {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .mini-score-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: transform 0.25s, box-shadow 0.25s;
            position: relative;
            border: 1px solid var(--border);
        }
        .mini-score-card:nth-child(1) { transform: rotate(-1.5deg) translateY(0); z-index: 3; }
        .mini-score-card:nth-child(2) { transform: rotate(1deg) translateY(-10px); z-index: 2; }
        .mini-score-card:nth-child(3) { transform: rotate(-0.5deg) translateY(-20px); z-index: 1; }
        .mini-score-card:hover {
            transform: rotate(0) translateY(-4px);
            box-shadow: var(--shadow-md);
            z-index: 5;
        }
        .team-name {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            flex: 1;
        }
        .score {
            font-family: var(--font-mono);
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 0 12px;
            letter-spacing: 2px;
        }
        .live-dot {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
            margin-left: 8px;
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(245,158,11,0.6); }
            70% { box-shadow: 0 0 0 8px rgba(245,158,11,0); }
            100% { box-shadow: 0 0 0 0 rgba(245,158,11,0); }
        }
        .badge-live {
            font-size: 12px;
            background: #FEF3C7;
            color: #92400E;
            padding: 2px 8px;
            border-radius: 99px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-text h1 {
                font-size: 36px;
            }
            .hero-cards {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
            }
            .mini-score-card {
                width: 200px;
                transform: none !important;
            }
        }
        @media (max-width: 640px) {
            .hero-text h1 {
                font-size: 30px;
            }
            .hero-buttons .btn {
                width: 100%;
            }
        }

        /* Section titles */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Live Dashboard */
        .dashboard-section {
            background: var(--dark-bg);
            padding: 64px 0;
            color: var(--text-light);
        }
        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .dashboard-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-glow);
            transition: transform 0.2s;
        }
        .dashboard-card:hover {
            transform: translateY(-4px);
        }
        .dashboard-icon {
            font-size: 24px;
            margin-bottom: 12px;
            color: var(--accent);
        }
        .dashboard-label {
            font-size: 13px;
            color: #94A3B8;
            margin-bottom: 8px;
        }
        .dashboard-value {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: #fff;
            line-height: 1.1;
        }
        .trend {
            font-size: 13px;
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .trend.up { color: var(--success); }
        .trend.down { color: var(--danger); }

        @media (max-width: 768px) {
            .dashboard-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .dashboard-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Services */
        .services-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 24px;
        }
        .service-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .service-card.featured {
            border-left: 4px solid var(--primary);
        }
        .icon-circle {
            width: 48px;
            height: 48px;
            background: #EFF6FF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 22px;
            transition: background 0.2s;
        }
        .service-card:hover .icon-circle {
            background: var(--primary);
            color: #fff;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .service-card p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .feature-list {
            list-style: none;
            margin-top: auto;
        }
        .feature-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text);
            padding: 6px 0;
        }
        .feature-list li::before {
            content: '✓';
            color: var(--success);
            font-weight: bold;
            font-size: 16px;
        }
        .mini-stat {
            background: #F8FAFC;
            border-radius: var(--radius-md);
            padding: 12px 16px;
            margin-top: 16px;
            font-size: 14px;
            color: var(--primary);
            font-weight: 600;
        }
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: 1fr 1fr;
            }
            .service-card.featured {
                grid-column: span 2;
            }
        }
        @media (max-width: 640px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
            .service-card.featured {
                grid-column: span 1;
            }
        }

        /* Comparison */
        .comparison-wrapper {
            display: flex;
            align-items: stretch;
            gap: 0;
            max-width: 900px;
            margin: 0 auto;
        }
        .team-card {
            flex: 1;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .team-logo-placeholder {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: #E2E8F0;
            margin-bottom: 16px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .team-logo-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .team-card h3 {
            font-size: 20px;
            margin-bottom: 24px;
        }
        .stat-row {
            display: flex;
            justify-content: space-between;
            width: 100%;
            margin-bottom: 12px;
            font-size: 14px;
        }
        .bar-bg {
            width: 100%;
            height: 8px;
            background: #E2E8F0;
            border-radius: 99px;
            margin-top: 4px;
            margin-bottom: 16px;
        }
        .bar-fill {
            height: 100%;
            border-radius: 99px;
            background: var(--primary);
        }
        .bar-fill.weak {
            background: #CBD5E1;
        }
        .vs-badge {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            background: var(--card-bg);
            border: 3px solid var(--primary);
            border-radius: 50%;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
            margin: 0 -12px;
            z-index: 2;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
            align-self: center;
            height: 64px;
        }
        @media (max-width: 768px) {
            .comparison-wrapper {
                flex-direction: column;
                gap: 0;
            }
            .vs-badge {
                margin: -24px auto;
            }
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 48px;
            align-items: start;
        }
        .faq-left h2 {
            font-size: 32px;
            font-weight: 600;
        }
        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-header {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: #fff;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.2s;
            color: var(--text);
        }
        .accordion-header:hover {
            background: #F8FAFC;
        }
        .accordion-header .q-mark {
            color: var(--primary);
            font-weight: 700;
            margin-right: 8px;
        }
        .accordion-icon {
            font-size: 20px;
            transition: transform 0.3s;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(45deg);
        }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            background: #F8FAFC;
        }
        .accordion-item.active .accordion-body {
            max-height: 300px;
        }
        .accordion-content {
            padding: 16px 22px 24px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* CTA Form */
        .cta-section {
            background: var(--dark-bg);
            padding: 80px 0;
            text-align: center;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            z-index: 1;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15,23,42,0.85);
            z-index: -1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 32px;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: #CBD5E1;
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            max-width: 480px;
            margin: 0 auto 16px;
        }
        .cta-form input {
            flex: 1;
            min-width: 220px;
            padding: 14px 18px;
            border-radius: var(--radius-md);
            background: #fff;
        }
        .cta-form .btn-accent {
            white-space: nowrap;
        }
        .privacy-note {
            font-size: 12px;
            color: #94A3B8;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }

        /* Footer */
        .site-footer {
            background: #F1F5F9;
            padding: 56px 0 0;
            border-top: 1px solid var(--border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .footer-col a {
            color: var(--text-secondary);
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .social-icons {
            display: flex;
            gap: 12px;
            font-size: 18px;
        }
        .copyright {
            text-align: center;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }