:root {
    /* 优化后的色调：更现代的科技蓝与柔和的背景 */
    --primary-color: #4F46E5; /* Indigo 600 - 更深邃、专业的蓝色 */
    --primary-hover: #4338ca; /* Indigo 700 */
    --secondary-color: #F3F4F6; /* Cool Gray 100 - 更清冷的背景 */
    --text-color: #1F2937; /* Gray 800 - 深灰，比纯黑更柔和 */
    --light-text: #6B7280; /* Gray 500 */
    --accent-color: #EC4899; /* Pink 500 - 对应花朵的强调色 */
    --white: #ffffff;
    --font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.025em;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--light-text);
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 2rem 4rem;
    background: linear-gradient(to bottom, var(--secondary-color), var(--white));
    text-align: center;
}

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

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 800;
}

.hero p {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}

.cta-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4);
}

.hero-image {
    margin-top: 4rem;
    width: 280px; /* 限制宽度，适合手机截图 */
    height: auto;
    border-radius: 20px; /* 增加圆角 */
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 8px solid var(--white); /* 增加白色边框，像手机外壳 */
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    font-weight: 700;
    color: var(--text-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 4rem; /* 增加间距 */
}

.feature-card {
    background: var(--white);
    padding: 0; /* 移除内边距，让图片撑满顶部或自定义 */
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
    text-align: center;
    overflow: hidden; /* 确保图片圆角 */
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.feature-image-container {
    background-color: var(--secondary-color);
    width: 100%;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-card img {
    width: auto;
    max-width: 100%;
    height: 400px; /* 统一高度 */
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.feature-content {
    padding: 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--light-text);
    line-height: 1.7;
}

/* Why Section */
.why-section {
    background-color: var(--secondary-color);
    padding: 6rem 2rem;
    text-align: center;
}

.why-content {
    max-width: 900px;
    margin: 0 auto;
}

.why-image {
    margin-top: 3rem;
    max-width: 400px;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
}

/* Footer */
footer {
    background-color: #111827; /* Gray 900 */
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
}

.footer-links a {
    color: #9CA3AF; /* Gray 400 */
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--white);
    text-decoration: none;
}

.contact-info {
    color: #6B7280; /* Gray 500 */
    font-size: 0.9rem;
}

/* Legal Pages */
.legal-content {
    margin-top: 80px;
    padding: 4rem 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.legal-content h1 {
    margin-bottom: 2rem;
    color: var(--text-color);
}

.legal-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.legal-content p, .legal-content li {
    margin-bottom: 1rem;
    color: var(--light-text);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none; /* Simple mobile hide for now */
    }
    
    .feature-card img {
        height: 300px;
    }
}