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

:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-color: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    padding: 15px 0;
}

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.cta-button {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Hero 区域 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    background: radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
}

.btn {
    padding: 14px 35px;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

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

.hero-stats {
    display: flex;
    gap: 50px;
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 浮动卡片 */
.hero-image {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 25px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
    display: flex;
    align-items: center;
    gap: 15px;
}

.floating-card .icon {
    font-size: 36px;
}

.floating-card p {
    font-size: 16px;
    font-weight: 600;
}

.card-1 {
    top: 50px;
    right: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 150px;
    left: 0;
    animation-delay: 2s;
}

.card-3 {
    bottom: 50px;
    right: 50px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 功能特点 */
.features {
    padding: 100px 0;
    background: var(--white);
}

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

.section-header h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-color);
}

.section-header p {
    color: var(--text-light);
    font-size: 18px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    background: var(--white);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 40px;
    margin-bottom: 20px;
}

.about-text > p {
    color: var(--text-light);
    margin-bottom: 30px;
    font-size: 18px;
}

.about-list {
    list-style: none;
    margin-bottom: 30px;
}

.about-list li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--text-color);
}

.check {
    color: #48bb78;
    font-weight: bold;
    margin-right: 10px;
    font-size: 18px;
}

.about-image {
    height: 400px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gradient-circle {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 50px rgba(102, 126, 234, 0);
    }
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 20px;
    position: relative;
    transition: all 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.quote {
    font-size: 60px;
    position: absolute;
    top: 20px;
    right: 30px;
    color: var(--primary-color);
    opacity: 0.3;
}

.testimonial-text {
    color: var(--text-color);
    font-style: italic;
    margin-bottom: 30px;
    line-height: 1.8;
}

.author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: 18px;
}

.author-info h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.author-info p {
    color: var(--text-light);
    font-size: 14px;
}

/* 价格方案 */
.pricing {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pricing-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-color);
}

.price {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.price span {
    font-size: 18px;
    color: var(--text-light);
    font-weight: 400;
}

.description {
    color: var(--text-light);
    margin-bottom: 30px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-color);
    border-bottom: 1px solid #e2e8f0;
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 40px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.info-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.info-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.info-item p {
    color: var(--text-light);
}

/* 页脚 */
.footer {
    background: #1a202c;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-section p {
    color: #a0aec0;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #2d3748;
    color: #a0aec0;
}

.beian-info {
    margin-top: 10px;
    font-size: 14px;
}

.beian-info a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
}

.beian-info a:hover {
    color: var(--white);
}

.beian-info span {
    margin: 0 10px;
    color: #4a5568;
}

.beian-info img {
    vertical-align: middle;
    margin-right: 5px;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .hero .container,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-image,
    .about-image {
        height: 300px;
    }

    .hero-title {
        font-size: 42px;
    }

    .features-grid,
    .testimonials-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-menu {
        display: none;
    }

    .hero-stats {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 32px;
    }

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

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

    .pricing-card.popular {
        transform: none;
    }

    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat {
        text-align: center;
    }

    .floating-card {
        padding: 15px;
    }

    .floating-card .icon {
        font-size: 28px;
    }

    .floating-card p {
        font-size: 14px;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}