:root {
    --primary-blue: #2563eb;
    --primary-green: #059669;
    --secondary-orange: #ea580c;
    --accent-purple: #7c3aed;
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-gray-50: #f9fafb;
    --bg-gray-100: #f3f4f6;
    --bg-gray-200: #e5e7eb;
    --border-gray-200: #e5e7eb;
    --border-gray-300: #d1d5db;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-gray-200);
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    justify-content: center;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline:hover {
    background: var(--primary-blue);
    color: white;
}

.btn-text {
    background: none;
    color: var(--text-secondary);
    padding: 12px 16px;
}

.btn-text:hover {
    color: var(--primary-blue);
    background: var(--bg-gray-50);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* 英雄区 */
.hero {
    padding: 120px 0 var(--spacing-24);
    background: linear-gradient(135deg, var(--bg-gray-50) 0%, var(--bg-white) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 3fr 5fr;
    gap: var(--spacing-16);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: var(--spacing-6);
}

.title-highlight {
    color: var(--primary-blue);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-8);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-12);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--spacing-1);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 仪表板模拟 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.dashboard-mockup {
    width: 100%;
    max-width: 600px;
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-gray-200);
    overflow: hidden;
}

.mockup-header {
    background: var(--bg-gray-50);
    padding: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    border-bottom: 1px solid var(--border-gray-200);
}

.header-controls {
    display: flex;
    gap: var(--spacing-2);
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red { background: #ef4444; }
.control-dot.yellow { background: #f59e0b; }
.control-dot.green { background: #10b981; }

.header-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.mockup-content {
    display: flex;
    height: 300px;
}

.sidebar {
    width: 150px;
    background: var(--bg-gray-50);
    padding: var(--spacing-4);
    border-right: 1px solid var(--border-gray-200);
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar-item:hover {
    background: var(--bg-white);
    color: var(--text-primary);
}

.sidebar-item.active {
    background: var(--primary-blue);
    color: white;
}

.main-area {
    flex: 1;
    padding: var(--spacing-4);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.stat-card {
    background: var(--bg-white);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.card-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
}

.card-icon.blue { background: var(--primary-blue); }
.card-icon.green { background: var(--primary-green); }
.card-icon.orange { background: var(--secondary-orange); }

.card-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 2px;
}

.card-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.chart-area {
    background: var(--bg-white);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3);
}

.chart-header h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-3);
}

.chart-content {
    height: 80px;
    display: flex;
    align-items: end;
    justify-content: center;
}

.chart-bars {
    display: flex;
    align-items: end;
    gap: var(--spacing-1);
    height: 60px;
}

.bar {
    width: 8px;
    background: linear-gradient(to top, var(--primary-blue), var(--primary-green));
    border-radius: 2px;
    animation: growUp 1.5s ease-out;
}

@keyframes growUp {
    from { height: 0; }
    to { height: var(--height, 50%); }
}

/* 通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-badge {
    display: inline-block;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 关于我们区块 */
.about {
    padding: var(--spacing-24) 0;
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-8);
}

.about-card {
    background: var(--bg-white);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: all 0.3s ease;
}

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

.about-card .card-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-6);
}

.about-card .card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.about-card .card-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.card-features {
    list-style: none;
}

.card-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.card-features i {
    color: var(--primary-green);
    font-size: 0.9rem;
}

/* 功能特色区块 */
.features {
    padding: var(--spacing-24) 0;
    background: var(--bg-gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.feature-card {
    background: var(--bg-white);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-6);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
    flex-grow: 1;
}

.feature-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: auto;
}

.feature-link:hover {
    gap: var(--spacing-3);
}

/* 解决方案区块 */
.solutions {
    padding: var(--spacing-24) 0;
    background: var(--bg-white);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.solution-card {
    background: var(--bg-white);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.solution-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.solution-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.solution-info {
    flex: 1;
}

.solution-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.solution-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.solution-content {
    flex-grow: 1;
    margin-bottom: var(--spacing-6);
}

.solution-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.solution-features {
    margin-bottom: var(--spacing-6);
}

.solution-features .feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.solution-features .feature-item i {
    color: var(--primary-green);
    font-size: 0.9rem;
}

.solution-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

.stat {
    text-align: center;
    padding: var(--spacing-4);
    background: var(--bg-gray-50);
    border-radius: var(--radius-lg);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--spacing-1);
}

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

.solution-footer {
    margin-top: auto;
}

/* 定价区块 */
.pricing {
    padding: var(--spacing-24) 0;
    background: var(--bg-gray-50);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
    margin-top: var(--spacing-6);
}

.toggle-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 32px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border-gray-300);
    transition: 0.4s;
    border-radius: 32px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 24px;
    width: 24px;
    left: 4px;
    bottom: 4px;
    background: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background: var(--primary-blue);
}

input:checked + .toggle-slider:before {
    transform: translateX(28px);
}

.discount {
    background: var(--secondary-orange);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: var(--spacing-2);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.pricing-card {
    background: var(--bg-white);
    border: 2px solid var(--border-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

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

.pricing-card.featured {
    border-color: var(--primary-blue);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-blue);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.plan-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-6);
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: var(--spacing-2);
}

.currency {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin: 0 4px;
}

.period {
    font-size: 1rem;
    color: var(--text-secondary);
}

.pricing-features {
    flex-grow: 1;
    margin-bottom: var(--spacing-8);
}

.pricing-features .feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.pricing-features .feature-item i {
    width: 16px;
    font-size: 0.9rem;
}

.pricing-features .feature-item i.fa-check {
    color: var(--primary-green);
}

.pricing-features .feature-item i.fa-times {
    color: var(--text-light);
}

.pricing-features .feature-item.disabled {
    color: var(--text-light);
}

.pricing-footer {
    margin-top: auto;
}

/* 联系我们区块 */
.contact {
    padding: var(--spacing-24) 0;
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: start;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
}

.info-card {
    background: var(--bg-gray-50);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.info-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--bg-white);
}

.info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-content {
    flex: 1;
}

.info-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.info-text {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 2px;
}

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

.contact-form {
    background: var(--bg-gray-50);
    border: 1px solid var(--border-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.form-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
}

.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-white);
    border: 2px solid var(--border-gray-200);
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-24) 0 var(--spacing-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-16);
    margin-bottom: var(--spacing-12);
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-6);
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
}

.footer-brand .brand-name {
    color: white;
}

.footer-brand .brand-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.brand-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: var(--spacing-8);
}

.social-links {
    display: flex;
    gap: var(--spacing-4);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

.group-title {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-4);
}

.link-list {
    list-style: none;
}

.link-list li {
    margin-bottom: var(--spacing-2);
}

.link-list a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.link-list a:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-6);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: var(--primary-blue);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        border-top: 1px solid var(--border-gray-200);
        flex-direction: column;
        padding: var(--spacing-6);
        gap: var(--spacing-4);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active .toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-toggle.active .toggle-line:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active .toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 100px 0 var(--spacing-16);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .dashboard-mockup {
        max-width: 100%;
    }
    
    .mockup-content {
        height: 250px;
    }
    
    .sidebar {
        width: 120px;
    }
    
    .sidebar-item {
        font-size: 0.75rem;
        padding: var(--spacing-1) var(--spacing-2);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2);
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .about-card,
    .feature-card,
    .solution-card,
    .pricing-card {
        padding: var(--spacing-6);
    }
    
    .contact-form {
        padding: var(--spacing-6);
    }
}

/* 动画和过渡效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-animate.animate {
    opacity: 1;
    transform: translateY(0);
}

/* 性能优化 */
.about-card,
.feature-card,
.solution-card,
.pricing-card,
.info-card {
    will-change: transform;
}

/* 可访问性 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度支持 */
@media (prefers-contrast: high) {
    :root {
        --border-gray-200: #9ca3af;
        --border-gray-300: #6b7280;
        --text-muted: #374151;
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        padding: 2rem 0;
    }
}