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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- 公共容器 --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- s1: 顶部导航 --- */
.s1 {
    background: #fff;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 100;
}

.s1-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.s1-nav ul {
    display: flex;
    gap: 15px;
}

.s1-nav a {
    font-size: 13px;
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

.s1-nav a:hover {
    color: #d70018;
}

.s1-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* --- s2: 主视觉图 --- */
.s2 {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.s2-hero {
    position: relative;
}

.s2-hero img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.s2-text {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    color: #fff;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

.s2-text h2 {
    font-size: 32px;
    line-height: 1.5;
    font-weight: bold;
}

.s2 .swiper-pagination{
	bottom: 50px !important;
}

.s2 .swiper-pagination .swiper-pagination-bullet-active{
	background:#d32f2f!important;
}

.s2 .swiper-pagination .swiper-pagination-bullet{
	width:18px!important;
	height: 18px!important;
}

/* --- s3: 产品展示 --- */
.s3 {
    padding: 60px 0;
    text-align: center;
}

.s3-title h2 {
    color: #d70018;
    font-size: 36px;
    margin-bottom: 10px;
    font-weight: 900;
}

.s3-title p {
    color: #666;
    font-size: 14px;
    margin-bottom: 40px;
}

.s3-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 20px;
}

.s3-item {
    text-align: center;
}

.s3-item img {
    margin: 0 auto 15px;
    transition: transform 0.3s;
}

.s3-item:hover img {
    transform: scale(1.05);
}

.s3-item h3 {
    font-size: 16px;
    margin-bottom: 5px;
    font-weight: bold;
}

.s3-item p {
    font-size: 12px;
    color: #888;
}

/* --- s4: 业务区块 --- */
.s4 {
    padding: 40px 0;
    background: #f9f9f9;
}

.s4 .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
	padding:20px;
	border-radius: 15px;
}

.s4-block {
    position: relative;
    overflow: hidden;
	border-radius: 15px;
}

.s4-block img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s;
}

.s4-block:hover img {
    transform: scale(1.05);
}

.s4-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
    text-align: center;
}

.s4-text h3 {
    font-size: 24px;
}

.s4-special .s4-text {
    color: #333;
    text-shadow: none;
    background: rgba(255,255,255,0.8);
    padding: 10px 20px;
}

.s4-badge {
    display: block;
    font-size: 12px;
    color: #d70018;
    font-weight: bold;
}

/* --- s5: 底部横幅链接 --- */
.s5 {
    padding: 40px 0;
}

.s5-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.s5-links a {
    display: block;
    position: relative;
    overflow: hidden;
	border-radius: 15px;
}

.s5-links img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.3s;
}

.s5-links a:hover img {
    transform: scale(1.05);
}

.s5-links span {
    position: absolute;
    bottom: 15px;
    left: 15px;
    color: #fff;
    font-size: 18px;
    font-weight: bold;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.7);
}

/* --- s6: 视频频道 --- */
.s6 {
    padding: 0;
}

.s6 .container{
	padding:20px;
}

.s6-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 20px;
}

.s6-sub {
    font-size: 12px;
    color: #999;
    display: block;
}

.s6-header h3 {
    font-size: 24px;
    color: #d70018;
    letter-spacing: 1px;
}

.s6-more {
    font-size: 14px;
    color: #555;
    border-bottom: 1px solid #555;
}

.s6-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.s6-video img {
    width: 100%;
	border-radius: 15px;
}

.s6-video p {
    font-size: 13px;
    margin-top: 10px;
    color: #333;
}

.s7-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 30px;
}

.s7-logo {
    flex: 1;
    min-width: 200px;
}

.s7-logo p {
    font-size: 12px;
    color: #666;
    margin-top: 10px;
}

.s7-links {
    flex: 2;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.s7-col a {
    display: block;
    font-size: 12px;
    color: #555;
    margin-bottom: 10px;
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
}

.s7-col a:hover {
    color: #d70018;
}

.s7-address {
    flex: 1;
    min-width: 200px;
    font-size: 12px;
    color: #666;
    text-align: right;
}

.s7-catalog {
    margin-top: 10px;
    margin-left: auto;
}

.s7-copyright {
    background: #fff;
    text-align: center;
    font-size: 12px;
    color: #999;
    padding: 20px 0;
    border-top: 1px solid #eee;
}

/* --- 响应式设计 (手机端) --- */
@media (max-width: 768px) {
    /* s1 */
    .s1-nav {
        display: none; /* 移动端隐藏导航，需配合JS */
    }
    .s1-nav.active {
        display: block;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #fff;
        padding: 20px;
        border-bottom: 1px solid #eee;
    }
    .s1-nav.active ul {
        flex-direction: column;
        gap: 10px;
    }
    .s1-menu-btn {
        display: block;
    }

    /* s2 */
    .s2-text h2 {
        font-size: 18px;
    }

    /* s3 */
    .s3-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px 10px;
    }
    .s3-title h2 {
        font-size: 28px;
    }
    .s3-item h3 {
        font-size: 14px;
    }

    /* s4 */
    .s4 .container {
        grid-template-columns: 1fr;
    }
    .s4-block img {
        height: 180px;
    }

    /* s5 */
    .s5-links {
        grid-template-columns: 1fr;
    }
    .s5-links img {
        height: 150px;
    }

    /* s6 */
    .s6-grid {
        grid-template-columns: 1fr;
    }
    .s6-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    /* s7 */
    .s7-content {
        flex-direction: column;
    }
    .s7-links {
        grid-template-columns: repeat(2, 1fr);
    }
    .s7-address {
        text-align: left;
    }
    .s7-catalog {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .s3-grid {
        grid-template-columns: 1fr;
    }
}