/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --secondary-color: #34d399;
    --accent-color: #22c55e;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(16, 185, 129, 0.02) 2px,
            rgba(16, 185, 129, 0.02) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(16, 185, 129, 0.02) 2px,
            rgba(16, 185, 129, 0.02) 4px
        );
    background-size: 50px 50px, 50px 50px;
    background-color: #fafafa;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(135deg, #10b981 0%, #059669 100%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 2px,
            rgba(255, 255, 255, 0.03) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 2px,
            rgba(255, 255, 255, 0.03) 4px
        );
    opacity: 0.15;
    z-index: -2;
    background-size: 100% 100%, 20px 20px, 20px 20px;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(5, 150, 105, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(34, 211, 153, 0.1) 0%, transparent 50%);
    animation: pulse 20s ease-in-out infinite;
}

.particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
    opacity: 0;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    animation: fadeInUp 0.8s ease 0.8s forwards;
    opacity: 0;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 特色功能 */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

/* 服务流程 */
.process {
    padding: 80px 0;
    background: var(--bg-white);
}

.process-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.process-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.step-icon {
    font-size: 3.5rem;
    margin: 1.5rem 0 1rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.step-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.process-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: 
        linear-gradient(135deg, #10b981 0%, #059669 100%),
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(255, 255, 255, 0.05) 10px,
            rgba(255, 255, 255, 0.05) 20px
        );
    background-size: 100% 100%, 40px 40px;
    color: white;
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    animation: pulse 15s ease-in-out infinite;
    z-index: 0;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.download-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.75rem;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(5px);
    border-color: rgba(255, 255, 255, 0.4);
}

.download-icon {
    width: 40px;
    height: 40px;
}

.download-btn-text {
    display: flex;
    flex-direction: column;
}

.download-btn-label {
    font-weight: 600;
    font-size: 1.125rem;
}

.download-btn-subtitle {
    font-size: 0.875rem;
    opacity: 0.8;
}

.download-note {
    font-size: 0.875rem;
    opacity: 0.8;
    font-style: italic;
}

.download-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 2rem;
    border: 10px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.phone-screen {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1.5rem;
    display: block;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: var(--bg-white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.company-info {
    margin-top: 2.5rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 0.75rem;
}

.info-item {
    display: flex;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.info-label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 100px;
}

.info-value {
    color: var(--text-secondary);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-downloads {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-download-btn {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    text-decoration: none;
    color: white;
    text-align: center;
    transition: background 0.3s ease;
}

.footer-download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: white;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .process-steps {
        flex-direction: column;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

    .download-content {
        grid-template-columns: 1fr;
    }

    .download-image {
        order: -1;
    }

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

    .section-title {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }

    .feature-card {
        padding: 2rem;
    }

    .download-title {
        font-size: 2rem;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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