* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", sans-serif; color: #333; line-height: 1.6; background: #fff; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; object-fit: cover; }
.container { max-width: 1400px; margin: 0 auto; padding: 0 20px; }


.header-wrapper { background: #fff; height: 100px; position: fixed; width: 100%; top: 0; z-index: 999; box-shadow: 0 2px 15px rgba(0,0,0,0.05); }
.nav-box { display: flex; align-items: center; justify-content: space-between; height: 100%; flex-wrap: nowrap; }
.logo-area { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 65px; width: auto; margin-right: 15px; }
.logo-name { display: flex; flex-direction: column; line-height: 1.1; }
.logo-name span { font-size: 24px; font-weight: bold; color: #000; letter-spacing: 1px; }
.logo-name small { font-size: 16px; color: #333; font-weight: 500; }
.nav-menu { flex-grow: 1; display: flex; justify-content: center; margin: 0 20px; }
.nav-menu a { color: #333; margin: 0 12px; font-size: 15px; white-space: nowrap; font-weight: 600; }
.nav-menu a:hover { color: #aa0006; }
.nav-contact { display: flex; align-items: center; flex-shrink: 0; border-left: 1px solid #eee; padding-left: 20px; height: 50px; }
.tel-icon { width: 35px; height: 35px; margin-right: 12px; }
.tel-info { display: flex; flex-direction: column; line-height: 1.2; }
.tel-label { font-size: 11px; color: #999; }
.tel-number { font-size: 22px; font-weight: bold; color: #ff6600; font-family: Arial; }
.mobile-btn { display: none; font-size: 28px; cursor: pointer; color: #333; }


.hero-slider { position: relative; width: 100%; height: 100vh; overflow: hidden; background: #000; margin-top: 100px; }
.slide { position: absolute; width: 100%; height: 100%; background-size: cover; background-position: center; opacity: 0; transition: 1s; display: flex; align-items: center; justify-content: center; }
.slide.active { opacity: 1; }
.slide-mask { position: absolute; width: 100%; height: 100%; background: rgba(0,0,0,0.45); }
.slide-content { position: relative; z-index: 2; color: #fff; text-align: center; }
.slide-content h1 { font-size: 60px; margin-bottom: 25px; font-weight: bold; line-height: 1.3; }
.slide-content p { font-size: 26px; letter-spacing: 5px; }
.slide-dots { position: absolute; bottom: 40px; width: 100%; text-align: center; z-index: 5; }
.dot { display: inline-block; width: 14px; height: 14px; margin: 0 10px; background: rgba(255,255,255,0.5); border-radius: 50%; cursor: pointer; transition: 0.3s; }
.dot.active { background: #ff6600; transform: scale(1.3); }


.section-box { padding: 90px 0; }
.bg-dark { background: #1a1a1a; color: #fff; }
.bg-darker { background: #111; color: #fff; }
.bg-gray { background: #f8f9fa; }
.sec-header { text-align: center; margin-bottom: 65px; }
.sec-header h2 { font-size: 38px; margin-bottom: 15px; }
.sec-line { width: 60px; height: 4px; background: #ff6600; margin: 0 auto; }
.header-white h2 { color: #fff; }


.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.adv-char-icon { 
    width: 80px; height: 80px; margin: 0 auto 25px; 
    border: 2px solid #ff6600; border-radius: 50%; 
    display: flex; align-items: center; justify-content: center; 
    font-size: 32px; color: #ff6600; transition: 0.3s; 
}
.adv-item:hover .adv-char-icon { background: #ff6600; color: #fff; transform: rotate(15deg); }
.adv-item h3 { font-size: 20px; margin-bottom: 15px; }
.adv-item p { color: #999; font-size: 14px; line-height: 1.8; }


.scope-content { text-align: center; max-width: 1000px; margin: 0 auto; }
.scope-desc { font-size: 16px; color: #ccc; margin-bottom: 45px; line-height: 2; }
.scope-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; }
.scope-list span { padding: 10px 30px; border: 1px solid #444; border-radius: 30px; font-size: 15px; background: rgba(255,255,255,0.05); }


.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.prod-card { background: #fff; border: 1px solid #eee; transition: 0.3s; overflow: hidden; border-radius: 4px; }
.prod-card:hover { transform: translateY(-8px); box-shadow: 0 10px 30px rgba(0,0,0,0.1); border-color: #ff6600; }
.prod-card img { width: 100%; height: 260px; }
.prod-info { padding: 18px; text-align: center; font-weight: bold; font-size: 16px; color: #333; }


.bg-pattern { background-image: url('../images/bg.png'); background-attachment: fixed; background-size: cover; position: relative; }
.bg-pattern::before { content: ''; position: absolute; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.68); }
.bg-pattern .container { position: relative; z-index: 2; }


.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.proc-box { padding: 35px; border: 1px solid #333; background: rgba(255,255,255,0.03); transition: 0.3s; text-align: center; display: flex; flex-direction: column; align-items: center; }
.proc-box:hover { border-color: #ff6600; background: rgba(255,255,255,0.05); }
.proc-img { width: 60px; height: 60px; margin-bottom: 15px; object-fit: contain; }
.proc-box .no { font-size: 45px; color: #333; font-weight: bold; margin-bottom: 12px; font-family: Arial; }
.proc-box:hover .no { color: #ff6600; }
.proc-box h4 { font-size: 22px; margin-bottom: 12px; color: #fff; }
.proc-box p { color: #888; font-size: 14px; }


.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.case-item { position: relative; height: 320px; overflow: hidden; border-radius: 4px; }
.case-item img { width: 100%; height: 100%; transition: 0.6s; }
.case-item:hover img { transform: scale(1.15); }
.case-item .hover { position: absolute; bottom: 0; width: 100%; padding: 20px; background: rgba(0,0,0,0.75); color: #fff; text-align: center; font-weight: bold; }


.about-flex { display: flex; align-items: center; gap: 70px; }
.about-text { flex: 1.3; }
.about-img { flex: 0.7; }
.about-img img { width: 100%; border-radius: 8px; box-shadow: 0 15px 40px rgba(0,0,0,0.1); }

/* 页脚 */
footer { background: #111; color: #fff; padding: 80px 0; border-top: 6px solid #ff6600; }
.foot-layout { display: flex; justify-content: space-between; align-items: flex-start; }
.f-left h3 { font-size: 26px; margin-bottom: 30px; letter-spacing: 1px; }
.f-left p { color: #aaa; margin-bottom: 12px; font-size: 15px; }
.f-right { text-align: right; }
.f-nav a { margin-left: 25px; color: #ccc; font-size: 15px; font-weight: 500; }
.f-nav a:hover { color: #fff; }
.copy { margin-top: 35px; color: #666; font-size: 13px; }

/* 移动端 */
@media (max-width: 1250px) { .nav-menu { display: none; } .mobile-btn { display: block; } }
@media (max-width: 768px) { .prod-grid, .process-grid, .adv-grid { grid-template-columns: 1fr; } .slide-content h1 { font-size: 34px; } .about-flex { flex-direction: column; } }