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

body {
    font-family: 'Inter', sans-serif;
    background-color: #111111;
    color: #e0e0e0;
    line-height: 1.7;
}

.container {
    width: 92%;
    max-width: 1100px;
    margin: 0 auto;
}

.section {
    padding: 90px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 34px;
    font-weight: 700;
    color: #ffffff;
    position: relative;
    display: inline-block;
    padding-bottom: 12px;
}

.section-title h2::after {
    content: '';
    width: 50px;
    height: 3px;
    background: #ffffff;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.btn {
    display: inline-block;
    padding: 15px 38px;
    background: #ffffff;
    color: #111;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    margin-top: 20px;
    transition: 0.3s;
}

.btn:hover {
    background: #bbbbbb;
}

.btn-whatsapp {
    background: #25d366 !important;
    color: #fff !important;
}

.btn-whatsapp:hover {
    background: #1da851 !important;
}

.header {
    background: #000000;
    padding: 22px 0;
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0,0,0,0.7);
}

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

.logo img {
    height: 150px;
    width: auto;
}

.nav a {
    margin-left: 32px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: 0.2s;
}

.nav a:hover {
    color: #bbbbbb;
}

/* -------------------------- */
/* 这里已经改成你服务器本地图片 */
/* -------------------------- */
.hero {
    height: 85vh;
    background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 12px;
}

.hero-content h2 {
    font-size: 20px;
    font-weight: 400;
    color: #cccccc;
    margin-bottom: 18px;
}

.hero-content p {
    font-size: 17px;
    max-width: 680px;
    margin: 0 auto;
    color: #bbbbbb;
}

.about {
    background: #111111;
    text-align: center;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    color: #cccccc;
}

.advantages {
    background: #181818;
}

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

.card {
    background: #222222;
    padding: 38px 28px;
    border-radius: 8px;
    text-align: center;
    transition: 0.3s;
}

.card:hover {
    background: #2a2a2a;
    transform: translateY(-4px);
}

.card h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 14px;
}

.card p {
    color: #aaaaaa;
    font-size: 15px;
}

.products {
    background: #111111;
}

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

.product-item img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    border-radius: 8px;
}

.contact {
    background: #000000;
    text-align: center;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-bottom: 35px;
}

.contact-item h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 6px;
}

.contact-item p {
    color: #cccccc;
    font-size: 16px;
}

.footer {
    background: #000000;
    color: #777777;
    text-align: center;
    padding: 35px 0;
    font-size: 14px;
}

@media (max-width: 768px) {
    .advantage-cards,.product-grid { grid-template-columns: 1fr; }
    .contact-info { flex-direction: column; gap: 25px; }
    .hero-content h1 { font-size: 36px; }
    .nav { display: none; }
}