/* ============================================
   全局样式和变量
   ============================================ */

:root {
    /* 颜色系统 */
    --primary-blue: #0066FF;
    --primary-blue-dark: #003D99;
    --primary-blue-light: #E6F2FF;
    --primary-blue-lighter: #F0F7FF;
    
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-light: #999999;
    
    --bg-white: #FFFFFF;
    --bg-light: #FAFAFA;
    --bg-gray: #F5F5F5;
    
    --border-color: #E0E0E0;
    
    /* 间距系统 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-2xl: 120px;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 64px rgba(0, 102, 255, 0.15);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   导航栏
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
}

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

.nav-brand .logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
}

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

/* ============================================
   按钮样式
   ============================================ */

.btn-primary,
.btn-outline,
.btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

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

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

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

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* ============================================
   Hero区
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #FFFFFF 0%, var(--primary-blue-lighter) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-blue);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--primary-blue-dark);
    bottom: -150px;
    left: -150px;
    animation-delay: 5s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(30px, -30px) scale(1.1);
    }
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.hero-text {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    animation: fadeInRight 0.8s ease-out 0.2s both;
}

.dashboard-mockup {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    position: relative;
    z-index: 2;
}

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

.mockup-dots {
    display: flex;
    gap: 6px;
}

.mockup-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
}

.mockup-dots span:nth-child(1) {
    background: #FF5F57;
}

.mockup-dots span:nth-child(2) {
    background: #FFBD2E;
}

.mockup-dots span:nth-child(3) {
    background: #28CA42;
}

.mockup-title {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.mockup-content {
    padding: var(--spacing-lg);
    background: white;
}

.mockup-chart {
    margin-bottom: var(--spacing-md);
}

.chart-svg {
    width: 100%;
    height: auto;
}

.chart-line {
    animation: drawLine 2s ease-out;
}

.chart-area {
    animation: fadeIn 1s ease-out 0.5s both;
}

.chart-point {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes drawLine {
    from {
        stroke-dasharray: 1000;
        stroke-dashoffset: 1000;
    }
    to {
        stroke-dasharray: 1000;
        stroke-dashoffset: 0;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

.mockup-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--primary-blue-lighter);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.floating-card {
    position: absolute;
    background: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 3;
    animation: floatCard 3s ease-in-out infinite;
}

.floating-icon {
    font-size: 24px;
}

.floating-text {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.card-1 {
    top: 10%;
    right: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: -15%;
    animation-delay: 1s;
}

.card-3 {
    top: 50%;
    right: -5%;
    animation-delay: 2s;
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   功能展示区
   ============================================ */

.features {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue-dark));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-blue-lighter);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.feature-preview {
    margin-top: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-gray);
}

.preview-mockup {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.preview-header {
    height: 40px;
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border-color);
}

.preview-content {
    padding: var(--spacing-md);
    min-height: 200px;
}

.preview-item {
    height: 60px;
    background: var(--bg-gray);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.preview-item:last-child {
    margin-bottom: 0;
}

.preview-chart {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    height: 150px;
    padding: var(--spacing-md) 0;
}

.chart-bar {
    flex: 1;
    background: linear-gradient(180deg, var(--primary-blue), var(--primary-blue-dark));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 20px;
    animation: growBar 1s ease-out;
}

@keyframes growBar {
    from {
        height: 0;
    }
}

.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.grid-item {
    aspect-ratio: 1;
    background: var(--bg-gray);
    border-radius: var(--radius-sm);
}

/* ============================================
   信任证明区
   ============================================ */

.trust {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--primary-blue-lighter) 100%);
}

.trust-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.trust-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.trust-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

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

.trust-stat {
    text-align: center;
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.trust-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.trust-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.trust-badges {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.badge-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.badge-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-blue-lighter);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.badge-icon svg {
    width: 24px;
    height: 24px;
}

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

.badge-text strong {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.badge-text span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ============================================
   行动号召区
   ============================================ */

.cta {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 20px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: white;
    color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

.cta .btn-outline {
    border-color: white;
    color: white;
}

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

/* ============================================
   页脚
   ============================================ */

.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-email {
    color: white;
    text-decoration: none;
    font-size: 18px;
    transition: var(--transition);
    display: inline-block;
}

.footer-email:hover {
    color: var(--primary-blue-light);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .floating-card {
        display: none;
    }
    
    .trust-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 60px;
        --spacing-2xl: 80px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-stats {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 14px;
        padding: var(--spacing-xs);
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .cta-description {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons a {
        width: 100%;
        text-align: center;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 16px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons a {
        width: 100%;
    }
}

/* ============================================
   滚动动画辅助类
   ============================================ */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}