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

body {
    font-family: "Microsoft YaHei", sans-serif;
    background: url('../images/features.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
}

header {
    background: rgba(0, 0, 0, 0.7);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
}

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

.logo img {
    height: 50px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 0 1.5rem;
    font-size: 1.1rem;
}

nav ul li a:hover {
    color: #ffd700;
}

a {
    text-decoration: none;
    color: #e5e7eb;
}
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.download-btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    background: #ffed4a;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.download-btn:hover {
    background: blue;
}

.features {
    padding: 5rem 2rem;
    background: rgba(0, 0, 0, 0.8);
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
}

.feature-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.feature-item h3 {
    margin-bottom: 1rem;
    color: #ffd700;
}

footer {
    text-align: center;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.9);
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 轮播图容器 */
.carousel {
    width: 560px;
    height: 980px;
    margin: 20px auto;
    position: relative;
    overflow: hidden;
}

.carousel-inner {
    width: 100%;
    height: 100%;
}

.carousel-item {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 轮播图按钮 */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 10px;
    cursor: pointer;
}

.carousel-control.prev {
    left: 10px;
}

.carousel-control.next {
    right: 10px;
}