/* roulang page: index */
:root {
            --brand-green: #1EAA5C;
            --brand-green-dark: #198A4B;
            --brand-green-deep: #0D7B46;
            --accent-orange: #FF7F3F;
            --bg-light: #FAFAFA;
            --bg-gray: #F7F7F7;
            --text-dark: #1B1B1B;
            --text-gray: #5E5E5E;
            --text-light: #888888;
            --white: #FFFFFF;
            --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 16px 32px rgba(0, 0, 0, 0.08);
            --card-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.06);
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --radius-2xl: 32px;
            --radius-btn: 30px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-2xl: 80px;
            --spacing-3xl: 100px;
            --max-width: 1200px;
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== 导航 ========== */
        #main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: all var(--transition-smooth);
            height: 72px;
            display: flex;
            align-items: center;
        }

        #main-nav.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--brand-green);
            letter-spacing: 0.5px;
            flex-shrink: 0;
            z-index: 1002;
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-green), var(--brand-green-deep));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 18px;
            letter-spacing: -1px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-green);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover {
            color: var(--brand-green);
        }
        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-green);
            color: #fff !important;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .nav-cta-btn:hover {
            background: var(--brand-green-dark);
            transform: scale(1.03);
            box-shadow: 0 6px 20px rgba(30, 170, 92, 0.3);
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* 汉堡菜单 */
        .nav-toggle {
            display: none;
            position: relative;
            width: 32px;
            height: 24px;
            cursor: pointer;
            z-index: 1003;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            position: absolute;
            height: 2.5px;
            width: 100%;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition-smooth);
            left: 0;
        }
        .nav-toggle span:nth-child(1) {
            top: 0;
        }
        .nav-toggle span:nth-child(2) {
            top: 10px;
        }
        .nav-toggle span:nth-child(3) {
            top: 20px;
        }

        #nav-checkbox {
            display: none;
        }
        #nav-checkbox:checked~.nav-toggle span:nth-child(1) {
            transform: rotate(45deg);
            top: 10px;
        }
        #nav-checkbox:checked~.nav-toggle span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        #nav-checkbox:checked~.nav-toggle span:nth-child(3) {
            transform: rotate(-45deg);
            top: 10px;
        }

        /* ========== Hero ========== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1EAA5C 0%, #0D7B46 40%, #0A5E35 100%);
            overflow: hidden;
            padding-top: 72px;
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
        }

        #hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(255, 255, 255, 0.015) 40px, rgba(255, 255, 255, 0.015) 41px),
                repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(255, 255, 255, 0.01) 60px, rgba(255, 255, 255, 0.01) 61px);
            pointer-events: none;
            opacity: 0.7;
        }

        .hero-inner {
            display: flex;
            align-items: center;
            gap: var(--spacing-2xl);
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--spacing-3xl) var(--spacing-md);
        }

        .hero-text {
            flex: 1 1 50%;
            color: #fff;
        }
        .hero-text h1 {
            font-size: 48px;
            line-height: 1.25;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.5px;
        }
        .hero-text .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            opacity: 0.9;
            margin-bottom: var(--spacing-lg);
            max-width: 480px;
        }
        .hero-buttons {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--brand-green);
            padding: 13px 32px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
        }
        .btn-primary:hover {
            transform: scale(1.04);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
            background: #f0faf4;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: #fff;
            padding: 12px 30px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.7);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: scale(1.03);
        }

        .hero-visual {
            flex: 1 1 45%;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-card {
            background: #fff;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--card-shadow-lg);
            position: relative;
            width: 100%;
            max-width: 460px;
            transition: transform var(--transition-smooth);
        }
        .hero-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 28px 56px rgba(0, 0, 0, 0.12);
        }
        .hero-card img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            display: block;
        }
        .hero-card-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-md);
            padding: 10px 16px;
            font-weight: 700;
            font-size: 15px;
            color: var(--brand-green);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            letter-spacing: 0.3px;
        }

        /* ========== 痛点区 ========== */
        #pain-points {
            background: var(--bg-gray);
            padding: var(--spacing-3xl) 0;
        }
        #pain-points .section-label {
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-orange);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: var(--spacing-xs);
        }
        #pain-points h2 {
            text-align: center;
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-xl);
        }
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .pain-card {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background: transparent;
            border-radius: var(--radius-lg);
            transition: all var(--transition-smooth);
        }
        .pain-card:hover {
            background: #fff;
            box-shadow: var(--card-shadow);
            transform: translateY(-4px);
        }
        .pain-icon {
            font-size: 56px;
            margin-bottom: var(--spacing-sm);
            display: block;
            line-height: 1;
        }
        .pain-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-xs);
        }
        .pain-card p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
            max-width: 260px;
            margin: 0 auto;
        }

        /* ========== 解决方案 ========== */
        #solution {
            padding: var(--spacing-3xl) 0;
            background: var(--bg-light);
        }
        #solution .section-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-green);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: var(--spacing-xs);
            display: inline-block;
            background: rgba(30, 170, 92, 0.08);
            padding: 6px 16px;
            border-radius: 20px;
        }
        #solution h2 {
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-lg);
        }
        .solution-card {
            display: flex;
            gap: var(--spacing-xl);
            background: #fff;
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            box-shadow: var(--card-shadow);
            position: relative;
            overflow: hidden;
            transition: all var(--transition-smooth);
            align-items: center;
        }
        .solution-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(30, 170, 92, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .solution-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .solution-card .badge-tag {
            position: absolute;
            top: 20px;
            left: 20px;
            background: linear-gradient(135deg, var(--brand-green), var(--brand-green-deep));
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            z-index: 2;
        }
        .solution-left {
            flex: 1 1 50%;
            position: relative;
            z-index: 1;
        }
        .solution-left h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-sm);
            margin-top: var(--spacing-lg);
        }
        .solution-left p {
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        .solution-right {
            flex: 1 1 50%;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            position: relative;
            z-index: 1;
        }
        .solution-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            background: var(--bg-gray);
            border-radius: var(--radius-md);
            padding: var(--spacing-sm) var(--spacing-md);
            transition: all var(--transition-fast);
        }
        .solution-item:hover {
            background: #eefdf3;
            transform: translateX(4px);
        }
        .solution-item .check-icon {
            width: 28px;
            height: 28px;
            background: var(--brand-green);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            flex-shrink: 0;
            font-weight: 700;
        }
        .solution-item-text {
            flex: 1;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
        }
        .solution-item-badge {
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-green);
            background: rgba(30, 170, 92, 0.1);
            padding: 4px 10px;
            border-radius: 12px;
            white-space: nowrap;
        }
        .solution-img-wrap {
            margin-top: var(--spacing-md);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
        }
        .solution-img-wrap img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        /* ========== 成果数据区 ========== */
        #results {
            padding: var(--spacing-3xl) 0;
            background: #fff;
        }
        #results h2 {
            text-align: center;
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-2xl);
        }
        .results-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .stat-card {
            text-align: center;
            background: #fff;
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl) var(--spacing-md);
            box-shadow: var(--card-shadow);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, rgba(30, 170, 92, 0.08) 0%, transparent 60%);
            border-radius: 0 0 0 40px;
            pointer-events: none;
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--card-shadow-hover);
        }
        .stat-number {
            font-size: 52px;
            font-weight: 800;
            line-height: 1;
            margin-bottom: var(--spacing-xs);
            background: linear-gradient(135deg, #1EAA5C 0%, #0D7B46 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-gray);
            font-weight: 500;
        }

        /* ========== 客户证言 ========== */
        #testimonials {
            padding: var(--spacing-3xl) 0;
            background: var(--bg-gray);
        }
        #testimonials h2 {
            text-align: center;
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-2xl);
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--card-shadow);
            position: relative;
            transition: all var(--transition-smooth);
        }
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 72px;
            line-height: 1;
            font-weight: 800;
            color: rgba(30, 170, 92, 0.12);
            pointer-events: none;
            font-family: Georgia, serif;
        }
        .testimonial-text {
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
            position: relative;
            z-index: 1;
            padding-top: var(--spacing-sm);
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            overflow: hidden;
            flex-shrink: 0;
            background: #e0e0e0;
        }
        .testimonial-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .testimonial-name {
            font-weight: 700;
            font-size: 15px;
            color: var(--text-dark);
        }
        .testimonial-role {
            font-size: 13px;
            color: var(--text-gray);
        }

        /* ========== FAQ ========== */
        #faq {
            padding: var(--spacing-3xl) 0;
            background: #fff;
        }
        #faq h2 {
            text-align: center;
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-2xl);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            border: 1px solid #e8e8e8;
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
            background: #fff;
        }
        .faq-item:hover {
            border-color: #d0d0d0;
        }
        .faq-item summary {
            padding: var(--spacing-md) 48px var(--spacing-md) var(--spacing-md);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            list-style: none;
            position: relative;
            user-select: none;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 22px;
            font-weight: 400;
            color: var(--brand-green);
            transition: transform var(--transition-smooth);
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(30, 170, 92, 0.06);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: translateY(-50%);
            background: rgba(30, 170, 92, 0.14);
        }
        .faq-item[open] {
            border-left: 4px solid var(--brand-green);
            border-color: var(--brand-green);
            box-shadow: 0 4px 16px rgba(30, 170, 92, 0.06);
        }
        .faq-item[open] summary {
            color: var(--brand-green);
            background: rgba(30, 170, 92, 0.03);
        }
        .faq-answer {
            padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
            border-left: 4px solid var(--brand-green);
            margin-left: 0;
            background: rgba(30, 170, 92, 0.015);
            padding-left: 20px;
        }

        /* ========== CTA ========== */
        #cta {
            padding: var(--spacing-3xl) 0;
            background: linear-gradient(135deg, #EBF7EF 0%, #D4EFDF 50%, #C5E8D5 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        #cta::before {
            content: '';
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(30, 170, 92, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        #cta h2 {
            font-size: 40px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 1;
        }
        #cta .cta-subtitle {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: var(--spacing-lg);
            position: relative;
            z-index: 1;
        }
        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .btn-solid-green {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-green);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            box-shadow: 0 6px 20px rgba(30, 170, 92, 0.25);
        }
        .btn-solid-green:hover {
            background: var(--brand-green-dark);
            transform: scale(1.04);
            box-shadow: 0 10px 28px rgba(30, 170, 92, 0.35);
        }
        .btn-outline-green {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--brand-green);
            padding: 13px 34px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            border: 2px solid var(--brand-green);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
        }
        .btn-outline-green:hover {
            background: rgba(30, 170, 92, 0.08);
            transform: scale(1.03);
        }

        /* ========== 页脚 ========== */
        #footer {
            background: #1B1B1B;
            color: #AAAAAA;
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
        }
        #footer .footer-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            align-items: start;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-xs);
        }
        .footer-brand .footer-tagline {
            font-size: 14px;
            color: #999;
            margin-bottom: var(--spacing-sm);
        }
        .footer-contact-info {
            font-size: 14px;
            color: #bbb;
            line-height: 1.8;
        }
        .footer-contact-info strong {
            color: #fff;
            font-weight: 600;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
        }
        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-links ul li a {
            color: #AAAAAA;
            font-size: 14px;
            transition: color var(--transition-fast);
        }
        .footer-links ul li a:hover {
            color: var(--brand-green);
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: var(--spacing-lg) auto 0;
            padding: var(--spacing-md) var(--spacing-md) 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 13px;
            color: #777;
        }
        .footer-bottom a {
            color: #999;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--brand-green);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .hero-inner {
                gap: var(--spacing-xl);
            }
            .hero-text h1 {
                font-size: 38px;
            }
            .hero-card img {
                height: 220px;
            }
            .pain-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: var(--spacing-md);
            }
            .results-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .testimonials-grid .testimonial-card:nth-child(3) {
                grid-column: span 2;
                max-width: 400px;
                justify-self: center;
            }
            .solution-card {
                flex-direction: column;
            }
            #solution h2 {
                font-size: 30px;
            }
            #results h2,
            #testimonials h2,
            #faq h2,
            #cta h2 {
                font-size: 30px;
            }
            #pain-points h2 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            #main-nav {
                height: 64px;
            }
            html {
                scroll-padding-top: 64px;
            }
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: #fff;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 28px;
                opacity: 0;
                pointer-events: none;
                transition: opacity var(--transition-smooth);
                z-index: 1001;
                padding: 40px;
            }
            #nav-checkbox:checked~.nav-links {
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                font-size: 20px;
                font-weight: 600;
            }
            .nav-cta-btn {
                font-size: 18px;
                padding: 14px 28px;
            }
            .nav-toggle {
                display: block;
            }
            .hero-inner {
                flex-direction: column;
                text-align: center;
                padding: var(--spacing-xl) var(--spacing-md);
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .hero-text .hero-subtitle {
                font-size: 16px;
                margin: 0 auto var(--spacing-lg);
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-card {
                max-width: 340px;
            }
            .hero-card img {
                height: 190px;
            }
            .pain-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }
            .pain-card {
                padding: var(--spacing-md);
            }
            .results-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-number {
                font-size: 40px;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .testimonials-grid .testimonial-card:nth-child(3) {
                grid-column: span 1;
                max-width: none;
                justify-self: auto;
            }
            .solution-card {
                padding: var(--spacing-md);
            }
            .solution-left h3 {
                font-size: 22px;
            }
            #solution h2 {
                font-size: 28px;
            }
            #results h2,
            #testimonials h2,
            #faq h2,
            #cta h2 {
                font-size: 28px;
            }
            #pain-points h2 {
                font-size: 28px;
            }
            #cta h2 {
                font-size: 28px;
            }
            #footer .footer-inner {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
                text-align: center;
            }
            .footer-links ul {
                align-items: center;
            }
            .faq-item summary {
                font-size: 15px;
                padding: var(--spacing-sm) 44px var(--spacing-sm) var(--spacing-sm);
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 26px;
                line-height: 1.35;
            }
            .hero-text .hero-subtitle {
                font-size: 14px;
            }
            .btn-primary,
            .btn-outline-light,
            .btn-solid-green,
            .btn-outline-green {
                font-size: 14px;
                padding: 10px 22px;
            }
            .hero-card {
                max-width: 280px;
                border-radius: var(--radius-xl);
            }
            .hero-card img {
                height: 160px;
            }
            .hero-card-badge {
                font-size: 12px;
                padding: 6px 10px;
                top: 10px;
                right: 10px;
            }
            .results-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }
            .stat-number {
                font-size: 38px;
            }
            #solution h2 {
                font-size: 24px;
            }
            #results h2,
            #testimonials h2,
            #faq h2,
            #cta h2 {
                font-size: 24px;
            }
            #pain-points h2 {
                font-size: 24px;
            }
            #cta h2 {
                font-size: 26px;
            }
            .container {
                padding: 0 16px;
            }
            .solution-card {
                border-radius: var(--radius-lg);
                padding: var(--spacing-sm);
            }
            .solution-item {
                flex-wrap: wrap;
            }
            .solution-item-badge {
                font-size: 11px;
            }
        }