body {
    font-family: 'Noto Sans', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1C2526; /* 深灰黑色背景，与 App 一致 */
    color: #D3D3D3; /* 浅灰色文本 */
}

/* 英雄区 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 2;
    color: #D4AF37; /* 浅金色标题 */
}

.hero-content h1 {
    font-size: 60px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 30px;
    color: #D3D3D3; /* 浅灰色描述 */
}

.cta-button {
    padding: 15px 40px;
    background-color: #2F3A3B; /* 深灰色按钮背景 */
    color: #D4AF37; /* 浅金色文字 */
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    transition: transform 0.3s, background-color 0.3s;
}

.cta-button:hover {
    transform: scale(1.05);
    background-color: #3F4A4B; /* 稍亮的深灰色 */
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1C2526, #2F3A3B); /* 深色渐变 */
    animation: gradientShift 10s infinite;
    z-index: 1;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 功能展示区 */
.features {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 50px;
    background-color: #2F3A3B; /* 深灰色背景 */
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    flex: 1;
    padding: 25px;
    background: #F5E8C7; /* 浅米色卡片背景 */
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
    min-width: 0;
}

.feature-card h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #D4AF37; /* 浅金色标题 */
}

.feature-card p {
    font-size: 16px;
    line-height: 1.5;
    color: #1C2526; /* 深色文字以确保对比度 */
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

/* 截图展示区 */
.screenshots {
    padding: 50px;
    text-align: center;
    background: linear-gradient(135deg, #1C2526, #2F3A3B); /* 深色渐变 */
}

.screenshots h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #D4AF37; /* 浅金色标题 */
}

.screenshot-carousel {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

.carousel-container {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-item {
    min-width: 300px;
    margin: 0 15px;
    text-align: center;
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.screenshot-img:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.screenshot-caption {
    margin-top: 10px;
    font-size: 16px;
    color: #A9A9A9; /* 中灰色，与书本数量颜色一致 */
}

/* 轮播按钮 */
.carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(47, 58, 59, 0.8); /* 深灰色背景 */
    color: #D4AF37; /* 浅金色箭头 */
    border: none;
    padding: 10px;
    cursor: pointer;
    font-size: 20px;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.carousel-prev {
    left: 10px;
}

.carousel-next {
    right: 10px;
}

.carousel-prev:hover, .carousel-next:hover {
    background-color: #3F4A4B;
}

/* Quote 展示区 */
.quote-showcase {
    padding: 50px;
    text-align: center;
    background: linear-gradient(135deg, #1C2526, #2F3A3B); /* 深色渐变 */
}

.quote-showcase h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #D4AF37; /* 浅金色标题 */
}

.quote-container {
    margin: 20px 0;
    font-style: italic;
    font-size: 20px;
    color: #1C2526; /* 深色文字 */
    background: #F5E8C7; /* 浅米色卡片背景 */
    padding: 20px;
    border-radius: 10px;
}

.quote-source {
    font-size: 14px;
    color: #A9A9A9; /* 中灰色来源 */
}

/* 页脚 */
footer {
    text-align: center;
    padding: 20px;
    background-color: #2F3A3B; /* 深灰色背景 */
    color: #D3D3D3; /* 浅灰色文字 */
}

footer a {
    color: #D4AF37; /* 浅金色链接 */
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}