/* ====== 全局重置 ====== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, "Microsoft YaHei", sans-serif;
    color: #333;
    background: #fafafa;
    line-height: 1.6;
}

/* ====== 导航栏 ====== */
nav {
    background: #1a3c2a;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}
.logo span {
    color: #7bcfa6;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    margin-left: 25px;
    font-size: 16px;
}
.nav-links a:hover {
    color: #7bcfa6;
}

/* ====== 首页大图 ====== */
.hero {
    background: linear-gradient(rgba(26, 60, 42, 0.7), rgba(26, 60, 42, 0.7)),
                url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?w=1200');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
    padding: 120px 20px;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}
.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    background: #7bcfa6;
    color: #1a3c2a;
    padding: 14px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 18px;
    display: inline-block;
}
.btn:hover {
    background: #5fb88a;
}

/* ====== 产品展示 ====== */
.products {
    max-width: 1100px;
    margin: 60px auto;
    padding: 0 20px;
    text-align: center;
}
.products h2 {
    font-size: 30px;
    margin-bottom: 40px;
    color: #1a3c2a;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
}
.product-card h3 {
    margin: 15px 0 8px;
    color: #1a3c2a;
}
.product-card p {
    color: #666;
    font-size: 14px;
}

/* ====== 内页通用 ====== */
.page-content {
    max-width: 800px;
    margin: 60px auto;
    padding: 0 20px;
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}
.page-content h1 {
    color: #1a3c2a;
    margin-bottom: 25px;
}
.page-content p {
    margin-bottom: 15px;
}

/* ====== 底部 ====== */
footer {
    text-align: center;
    padding: 30px 20px;
    color: #888;
    font-size: 14px;
    border-top: 1px solid #eee;
}