/* roulang page: index */
:root {
            --primary: #1A1A2E;
            --primary-light: #2D2D44;
            --accent: #D4AF37;
            --accent-light: rgba(212, 175, 55, 0.2);
            --bg: #F8F9FA;
            --text-primary: #333333;
            --text-secondary: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --radius: 12px;
            --radius-lg: 16px;
            --shadow: 0 4px 20px rgba(26, 26, 46, 0.05);
            --shadow-hover: 0 8px 30px rgba(26, 26, 46, 0.1);
            --spacing-section: 80px;
            --spacing-card: 24px;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-primary);
            background: var(--bg);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        button, input, select, textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        #navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(26, 26, 46, 0.1);
            transition: all 0.3s ease;
            height: 72px;
        }

        #navbar.scrolled {
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid rgba(26, 26, 46, 0.15);
            box-shadow: 0 2px 20px rgba(26, 26, 46, 0.05);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.05em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary) 0%, #2D2D44 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            position: relative;
        }

        .logo-icon::after {
            content: '';
            position: absolute;
            top: -2px;
            right: -2px;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 40px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.2s ease;
            position: relative;
            padding: 8px 0;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s ease;
        }

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

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.4);
            animation: pulse-ring 2s infinite;
        }

        @keyframes pulse-ring {
            0% {
                box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.4);
            }
            70% {
                box-shadow: 0 0 0 12px rgba(212, 175, 55, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(212, 175, 55, 0);
            }
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: scale(1.05);
        }

        .badge {
            background: var(--accent);
            color: white;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            white-space: nowrap;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--primary);
            transition: all 0.3s ease;
        }

        .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);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 24px;
                font-size: 14px;
            }
            .nav-cta .btn-primary {
                padding: 10px 20px;
                font-size: 14px;
            }
            .badge {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(26, 26, 46, 0.97);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 100px 32px 32px;
                transition: right 0.3s ease;
                gap: 28px;
                align-items: flex-start;
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links a {
                color: white;
                font-size: 17px;
            }
            .nav-links a:hover {
                color: var(--accent);
            }
            .nav-cta {
                display: none;
            }
            #navbar.scrolled .nav-links {
                background: rgba(26, 26, 46, 0.98);
            }
        }

        /* Hero */
        #hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.03) 0%, rgba(212, 175, 55, 0.05) 100%);
            position: relative;
            overflow: hidden;
        }

        #hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin: 0 0 24px;
        }

        .hero-content h1 .highlight {
            color: var(--accent);
        }

        .hero-content .subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 36px;
        }

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

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            border: 2px solid var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(26, 26, 46, 0.08);
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .hero-visual img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.3) 0%, rgba(212, 175, 55, 0.15) 100%);
            border-radius: var(--radius-lg);
        }

        @media (max-width: 1024px) {
            #hero {
                padding: 140px 0 80px;
            }
            .hero-grid {
                gap: 40px;
            }
            .hero-content h1 {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            #hero {
                padding: 100px 0 60px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-visual {
                order: -1;
                max-width: 500px;
                margin: 0 auto;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }
        }

        /* Sections */
        section {
            padding: var(--spacing-section) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 痛点 */
        #solution {
            background: white;
        }

        .pain-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-card);
            margin-bottom: 60px;
        }

        .pain-card {
            background: rgba(248, 249, 250, 0.8);
            border: 1px solid rgba(26, 26, 46, 0.08);
            border-radius: var(--radius);
            padding: 32px;
            transition: all 0.3s ease;
        }

        .pain-card:hover {
            border-color: rgba(212, 175, 55, 0.3);
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }

        .pain-icon {
            width: 48px;
            height: 48px;
            border: 2px solid var(--accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            margin-bottom: 20px;
            font-size: 20px;
        }

        .pain-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .pain-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin: 0;
        }

        .divider-accent {
            text-align: center;
            font-weight: 700;
            font-size: 2rem;
            color: var(--accent);
            margin: 40px 0;
            position: relative;
        }

        .divider-accent::before,
        .divider-accent::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 100px;
            height: 2px;
            background: linear-gradient(to right, transparent, var(--accent), transparent);
        }
        .divider-accent::before {
            right: 55%;
        }
        .divider-accent::after {
            left: 55%;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .solution-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .solution-image img {
            width: 100%;
            border-radius: var(--radius-lg);
        }

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

        .solution-list li {
            display: flex;
            gap: 16px;
            margin-bottom: 28px;
            align-items: flex-start;
        }

        .solution-bullet {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
            margin-top: 8px;
        }

        .solution-list h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 4px;
        }

        .solution-list p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 0.95rem;
        }

        @media (max-width: 768px) {
            .pain-cards {
                grid-template-columns: 1fr;
            }
            .solution-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .section-header h2 {
                font-size: 2rem;
            }
        }

        /* Results */
        #results {
            background: rgba(248, 249, 250, 0.6);
        }

        .results-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-card);
        }

        .stat-card {
            text-align: center;
            padding: 36px 24px;
            background: white;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-unit {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .stat-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .results-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .results-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Testimonials */
        #testimonials {
            background: white;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-card);
        }

        .testimonial-card {
            background: white;
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .testimonial-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            overflow: hidden;
            margin-bottom: 20px;
            background: #F3F4F6;
        }

        .testimonial-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .testimonial-quote {
            font-style: italic;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
            min-height: 80px;
        }

        .testimonial-author {
            font-weight: 700;
            color: var(--primary);
            font-size: 0.95rem;
        }

        .testimonial-role {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
        }

        /* FAQ */
        #faq {
            background: rgba(248, 249, 250, 0.4);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0 40px;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 24px 0;
        }

        .faq-question {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            transition: color 0.2s ease;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-q {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            flex-shrink: 0;
            line-height: 1;
        }

        .faq-toggle {
            margin-left: auto;
            font-size: 1.2rem;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 16px 0 0 52px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            background: rgba(212, 175, 55, 0.03);
            border-left: 3px solid var(--accent);
            padding-left: 20px;
            margin-left: 32px;
            margin-top: 12px;
        }

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

        /* CTA */
        #cta {
            background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
            padding: var(--spacing-section) 0;
            text-align: center;
            color: white;
        }

        #cta h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: white;
        }

        #cta .subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 40px;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 700px;
            margin: 0 auto 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input,
        .cta-form select {
            padding: 14px 20px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 0.95rem;
            min-width: 160px;
            flex: 1;
            outline: none;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .cta-form select {
            color: rgba(255, 255, 255, 0.8);
        }

        .cta-form select option {
            color: var(--primary);
        }

        .cta-form input:focus,
        .cta-form select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
        }

        .btn-accent {
            background: white;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            border: none;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-accent:hover {
            background: var(--accent);
            color: white;
        }

        .cta-disclaimer {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.85rem;
            margin-top: 16px;
        }

        @media (max-width: 768px) {
            .cta-form {
                flex-direction: column;
                max-width: 100%;
            }
            #cta h2 {
                font-size: 2rem;
            }
        }

        /* Footer */
        footer {
            background: var(--primary);
            padding: 60px 0 30px;
            color: var(--text-muted);
        }

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

        .footer-brand h4 {
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h5 {
            color: white;
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 16px;
        }

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

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            margin: 0 8px;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 通用辅助 */
        .text-accent {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
        }