/* ========================================================= 全局样式 ========================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: #f5f5f5;
    color: #222;
    overflow-x: hidden;
}

img {
    width: 100%;
    display: block;
}

a {
    text-decoration: none;
}

.container {
    width: 1200px;
    max-width: 95%;
    margin: auto;
}

/* ========================================================= 导航栏 ========================================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    transition: background 0.3s ease;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 82px;
}

.logo img {
    width: 170px;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    transition: 0.3s;
}

.nav a:hover {
    color: #ff2a2a;
}

/* ========================================================= HERO BANNER ========================================================= */
.hero {
    position: relative;
    height: 520px;
    overflow: hidden;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    width: 90%;
}

.hero-content h1 {
    font-size: 58px;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 35px;
    opacity: 0.9;
}

.hero-btn {
    display: inline-block;
    background: #ff1f1f;
    color: #fff;
    padding: 16px 38px;
    border-radius: 50px;
    font-weight: 700;
    transition: 0.3s;
}

.hero-btn:hover {
    transform: translateY(-4px);
    background: #d50000;
}

/* ========================================================= 轮播展示图 ========================================================= */
.main-showcase {
    padding: 60px 0;
}

.showcase-slider {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.showcase-slider img {
    height: 700px;
    object-fit: cover;
    transition: src 0.5s ease-in-out;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 54px;
    height: 54px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    transition: 0.3s;
}

.slider-btn:hover {
    background: #ff2020;
    color: #fff;
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

/* ========================================================= 全局模块标题 ========================================================= */
.section-title {
    margin-bottom: 35px;
}

.section-title h2 {
    font-size: 38px;
    font-weight: 800;
    color: #d70000;
}

/* ========================================================= MANUFACTURING (制造范围) ========================================================= */
.manufacturing {
    padding: 30px 0 50px;
}

.manufacturing-text {
    line-height: 1.9;
    font-size: 16px;
    color: #555;
}

.manufacturing-text p {
    margin-bottom: 20px;
}

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

.burner-card {
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: 0.4s;
}

.burner-card:hover {
    transform: translateY(-10px);
}

.burner-card img {
    height: 240px;
    object-fit: cover;
}

.burner-content {
    padding: 25px;
    text-align: center;
}

.burner-content a {
    background: #ff1c1c;
    color: #fff;
    padding: 12px 24px;
    border-radius: 40px;
    font-weight: 700;
    display: inline-block;
    transition: 0.3s;
}

.burner-content a:hover {
    background: #cc0000;
}

/* ========================================================= VIDEO (视频区域) ========================================================= */
.video-section {
    padding: 30px 0 80px;
}

.video-wrapper {
    position: relative;
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-height: 480px;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    min-height: 480px;
    object-fit: cover;
    display: block;
    background: #000;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: rgba(255, 29, 29, 0.95);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-size: 34px;
    cursor: pointer;
    transition: 0.4s;
    box-shadow: 0 0 20px rgba(255, 29, 29, 0.4);
    z-index: 2;
}

.play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: #cc0000;
}

/* ========================================================= ABOUT US (关于我们) ========================================================= */
.about {
    padding: 30px 0 80px;
}

.about-text {
    line-height: 1.9;
    color: #555;
    font-size: 16px;
}

.about-text p {
    margin-bottom: 18px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.stat-box {
    background: #fff;
    padding: 50px 20px;
    border-radius: 18px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.stat-box h3 {
    font-size: 50px;
    color: #e60000;
    margin-bottom: 12px;
    font-weight: 800;
}

.stat-box p {
    font-size: 14px;
    color: #666;
    line-height: 1.4;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image img {
    max-width: 100%;
    object-fit: contain;
    transform: scale(1.2);
    transform-origin: center;
    display: block;
    margin: 0 auto;
}

/* ========================================================= FOOTER NEW VERSION ========================================================= */
.footer{
    position: relative;
    background:#000;
    padding:70px 0 90px;
    color:#fff;
}

.footer-wrapper{
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    gap:60px;
}

.footer-left{
    width:30%;
    text-align: left;
}

.footer-left img{
    width:186px;
    margin:0 0 12px 0;
    display:block;
}

.footer-company{
    font-size:12px;
    color:#bdbdbd;
    margin-bottom:70px;
    line-height:1.6;
}

.follow-box{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:18px;
    justify-content:flex-start;
}

.follow-box a{
    width:24px;
    height:24px;
    background:#ff0000;
    border-radius:4px;
    display:flex;
    justify-content:center;
    align-items:center;
    color:#fff;
    font-size:13px;
}

.follow-box span{
    font-size:18px;
    font-weight:500;
}

.copyright{
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    font-size:11px;
    color:#8f8f8f;
    line-height:1.6;
    width: auto;
    white-space: nowrap;
    text-align: center;
}

.footer-center{
    width:40%;
}

.footer-center h3{
    font-size:26px;
    margin-bottom:35px;
    font-weight:700;
}

.tags-grid{
    display:flex;
    gap:80px;
    align-items:flex-start;
}

.tags-grid ul{
    list-style:none;
    margin: 0;
    padding: 0 0 0 10px;
}

.tags-grid li{
    margin-bottom:18px;
}

.tags-grid a{
    color:#d0d0d0;
    font-size:13px;
    white-space: nowrap;
    transition:0.3s;
}

.tags-grid a:hover{
    color:#ff2a2a;
}

.footer-right{
    width:30%;
}

.footer-right h3{
    font-size:26px;
    margin-bottom:35px;
    text-align:center;
}

.contact-list{
    display:flex;
    justify-content:center;
    gap:50px;
}

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

.contact-item img{
    width:72px;
    height:72px;
    border-radius:50%;
    object-fit:cover;
    border:4px solid #fff;
    margin:18px auto 12px;
    object-position: center calc(50% + 10px);
}

.contact-item h4{
    color:#ff3a3a;
    font-size:16px;
    margin-bottom:4px;
}

.contact-item p{
    font-size:14px;
    color:#e5e5e5;
    margin-bottom:4px;
}

.contact-item span{
    font-size:15px;
    color:#fff;
    line-height:1.5;
    white-space: nowrap;
}

/* ========================================================= 响应式媒体查询 ========================================================= */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 42px;
    }
    .burner-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-wrapper{
        flex-direction:column;
    }
    .footer-left,
    .footer-center,
    .footer-right{
        width:100%;
    }
    .tags-grid {
        gap: 40px;
    }
    .contact-list {
        justify-content: flex-start;
    }
    .contact-item img{
        margin:18px auto 12px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none; /* 移动端隐藏标准导航 */
    }
    .hero {
        height: 420px;
    }
    .hero-content h1 {
        font-size: 34px;
    }
    .hero-content p {
        font-size: 18px;
    }
    .showcase-slider img {
        height: 400px;
    }
    .video-wrapper img {
        height: 420px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .tags-grid{
        flex-direction:column;
        gap:10px;
    }
    .contact-list{
        flex-direction:column;
        align-items:flex-start;
    }
    .contact-item img{
        margin:18px auto 12px;
    }
}