/* roulang page: index */
:root {
            --deep-blue: #0A1628;
            --electric-cyan: #00E5FF;
            --warm-gold: #F0C45A;
            --dark-gray: #1E2D3D;
            --text-white: #FFFFFF;
            --text-light: rgba(255,255,255,0.8);
            --text-muted: rgba(255,255,255,0.5);
            --border-subtle: rgba(255,255,255,0.12);
            --border-hover: rgba(0,229,255,0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 50px;
            --shadow-card: 0 8px 32px rgba(0,229,255,0.12);
            --shadow-btn: 0 0 24px rgba(0,229,255,0.5);
            --shadow-input: 0 0 16px rgba(0,229,255,0.3);
            --transition-smooth: 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', '思源黑体', sans-serif;
            font-weight: 400;
            line-height: 1.6;
            background: var(--deep-blue);
            color: var(--text-white);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Noto Sans SC', '思源黑体', sans-serif;
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
            color: var(--text-white);
        }

        .number-font {
            font-family: 'DIN Alternate', 'Inter', sans-serif;
            font-weight: 700;
        }

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

        a:hover {
            color: var(--electric-cyan);
        }

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

        button, .button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-smooth);
        }

        input, textarea {
            font-family: inherit;
            outline: none;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航 */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(10, 22, 40, 0.75);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 1000;
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--electric-cyan), #007BFF);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-light);
            position: relative;
            padding: 8px 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--electric-cyan);
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--electric-cyan);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            width: 24px;
            height: 18px;
            justify-content: center;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-white);
            transition: all var(--transition-smooth);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 22, 40, 0.95);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 40px;
        }

        .mobile-menu a {
            font-size: 24px;
            font-weight: 500;
            color: var(--text-white);
        }

        .mobile-menu.active {
            display: flex;
        }

        /* Hero */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0A1628 0%, #0F2440 50%, #0A1628 100%);
            overflow: hidden;
            padding-top: 72px;
        }

        .particle-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            width: 3px;
            height: 3px;
            background: var(--electric-cyan);
            border-radius: 50%;
            animation: float 6s infinite ease-in-out;
            opacity: 0.6;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) translateX(0); }
            25% { transform: translateY(-20px) translateX(10px); }
            50% { transform: translateY(-10px) translateX(-10px); }
            75% { transform: translateY(-30px) translateX(5px); }
        }

        .hero-content {
            position: relative;
            z-index: 10;
        }

        .hero-title {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            font-weight: 700;
            margin-bottom: 24px;
            line-height: 1.2;
            background: linear-gradient(to right, #FFFFFF, #00E5FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #00E5FF, #007BFF);
            color: #fff;
            font-weight: 700;
            padding: 16px 40px;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-btn);
            font-size: 16px;
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            transform: translateY(-4px);
            box-shadow: 0 0 36px rgba(0,229,255,0.7);
            color: #fff;
        }

        .btn-secondary {
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 16px 40px;
            border-radius: var(--radius-xl);
            border: 2px solid rgba(255,255,255,0.8);
            font-size: 16px;
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-secondary:hover {
            background: #fff;
            color: #0A1628;
            border-color: #fff;
        }

        .hero-stats {
            position: absolute;
            bottom: 40px;
            right: 20px;
            display: flex;
            gap: 24px;
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px 28px;
            z-index: 10;
        }

        .stat-item {
            text-align: center;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
        }

        .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 通用板块样式 */
        .section-padding {
            padding: 100px 0;
        }

        .section-title {
            font-size: clamp(2rem, 4vw, 3rem);
            text-align: center;
            margin-bottom: 16px;
        }

        .section-desc {
            text-align: center;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 60px;
            font-size: 1.1rem;
        }

        .glass-card {
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all var(--transition-smooth);
        }

        .glass-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-8px);
            box-shadow: var(--shadow-card);
        }

        /* 痛点区 */
        .pain-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 2fr;
            gap: 24px;
            align-items: start;
        }

        .pain-main-card {
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
        }

        .pain-main-card img {
            width: 100%;
            height: 350px;
            object-fit: cover;
        }

        .pain-side-cards {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .pain-small-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(255, 80, 80, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ff5050;
            font-size: 20px;
            flex-shrink: 0;
        }

        /* 解决方案 */
        .solutions-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding-bottom: 20px;
            -webkit-overflow-scrolling: touch;
        }

        .solutions-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .solutions-scroll::-webkit-scrollbar-thumb {
            background: var(--electric-cyan);
            border-radius: 10px;
        }

        .solution-card {
            min-width: 340px;
            scroll-snap-align: start;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            background: rgba(255,255,255,0.03);
            transition: all var(--transition-smooth);
        }

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

        .solution-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }

        .solution-card-body {
            padding: 24px;
        }

        .progress-bar {
            height: 4px;
            background: rgba(255,255,255,0.1);
            border-radius: 2px;
            margin-top: 20px;
        }

        .progress-fill {
            height: 100%;
            background: var(--electric-cyan);
            border-radius: 2px;
            width: 60%;
        }

        /* 成果 */
        .results-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }

        .result-card {
            text-align: center;
            padding: 40px 24px;
            position: relative;
        }

        .result-card.featured {
            transform: scale(1.05);
            border-color: var(--electric-cyan);
            box-shadow: 0 0 40px rgba(0,229,255,0.2);
        }

        .result-number {
            font-size: 3.5rem;
            margin-bottom: 8px;
        }

        .result-arrow {
            color: #00FF88;
            font-size: 1.2rem;
            margin-left: 8px;
        }

        /* 证言 */
        .testimonials-carousel {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
        }

        .testimonial-card {
            min-width: 400px;
            scroll-snap-align: start;
            border-left: 3px solid var(--electric-cyan);
            padding: 32px;
            position: relative;
        }

        .testimonial-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--electric-cyan), #007BFF);
            margin-bottom: 16px;
        }

        .testimonial-quote {
            font-style: italic;
            margin-bottom: 16px;
            color: var(--text-light);
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-subtle);
        }

        .faq-question {
            padding: 20px;
            background: rgba(255,255,255,0.03);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: background var(--transition-smooth);
        }

        .faq-question:hover {
            background: rgba(255,255,255,0.06);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            color: var(--text-light);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 24px 20px;
        }

        .faq-indicator {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--electric-cyan);
            flex-shrink: 0;
            margin-right: 12px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0A1628, #0F2440);
            position: relative;
            overflow: hidden;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .cta-visual img {
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-input {
            width: 100%;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            color: #fff;
            font-size: 16px;
            transition: all var(--transition-smooth);
        }

        .form-input::placeholder {
            color: rgba(255,255,255,0.4);
        }

        .form-input:focus {
            border-color: var(--electric-cyan);
            box-shadow: var(--shadow-input);
        }

        .btn-submit {
            width: 100%;
            background: linear-gradient(135deg, #00E5FF, #007BFF);
            color: #fff;
            font-weight: 700;
            padding: 16px;
            border-radius: var(--radius-md);
            font-size: 18px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0,229,255,0.4); }
            70% { box-shadow: 0 0 0 15px rgba(0,229,255,0); }
            100% { box-shadow: 0 0 0 0 rgba(0,229,255,0); }
        }

        .btn-submit:hover {
            transform: translateY(-2px);
        }

        /* 页脚 */
        .main-footer {
            background: #0A1628;
            padding: 60px 0 20px;
            border-top: 1px solid var(--border-subtle);
        }

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

        .footer-brand p {
            color: var(--text-muted);
            margin-top: 16px;
        }

        .footer-links h4 {
            font-size: 1rem;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            color: var(--electric-cyan);
        }

        .social-icons {
            display: flex;
            gap: 12px;
        }

        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
            color: var(--text-muted);
        }

        .social-icon:hover {
            background: rgba(0,229,255,0.2);
            border-color: var(--electric-cyan);
            color: var(--electric-cyan);
        }

        .copyright {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .pain-grid {
                grid-template-columns: 1fr;
            }
            .results-grid {
                grid-template-columns: 1fr;
            }
            .result-card.featured {
                transform: scale(1);
                order: -1;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .cta-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .testimonial-card {
                min-width: 300px;
            }
            .solution-card {
                min-width: 280px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-stats {
                position: relative;
                bottom: auto;
                right: auto;
                margin-top: 40px;
                justify-content: center;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .section-padding {
                padding: 60px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .results-grid {
                gap: 16px;
            }
            .hero-stats {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-stats {
                gap: 16px;
                padding: 16px;
            }
            .stat-value {
                font-size: 1.5rem;
            }
            .testimonial-card {
                min-width: 260px;
            }
            .solution-card {
                min-width: 260px;
            }
        }