/* ===== 首页样式 ===== */

/* ===== Banner 轮播区 ===== */
.banner-area{position:relative;width:100%;aspect-ratio:1600/640;max-height:680px;overflow:hidden}
.banner-track{position:absolute;inset:0}
.banner-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1s ease;display:flex;align-items:center}
.banner-slide.active{opacity:1;z-index:2}
.banner-content{position:relative;z-index:3;color:#fff;padding-top:40px}
.banner-sub{color:#d4a843;font-size:18px;letter-spacing:4px;text-transform:uppercase;margin-bottom:16px;display:block;opacity:0;animation:slideUp .8s ease forwards}
.banner-title{font-size:52px;color:#fff;font-weight:800;max-width:720px;line-height:1.25;margin-bottom:28px;opacity:0;animation:slideUp .8s .15s ease forwards;text-shadow:0 4px 20px rgba(0,0,0,.3)}
.banner-cta{display:flex;gap:16px;flex-wrap:wrap;opacity:0;animation:slideUp .8s .3s ease forwards}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.banner-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.15);color:#fff;font-size:20px;display:flex;align-items:center;justify-content:center;transition:all .3s ease;border:1px solid rgba(255,255,255,.3)}
.banner-arrow:hover{background:#d4a843;color:#1B5E9E}
.banner-arrow.prev{left:24px}
.banner-arrow.next{right:24px}
.banner-dots{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.banner-dots .dot{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.4);transition:all .3s ease}
.banner-dots .dot.active{background:#d4a843;transform:scale(1.25)}
@media(max-width:768px){.banner-title{font-size:34px}.banner-area{aspect-ratio:1600/540;max-height:none}}
@media(max-width:576px){.banner-title{font-size:27px}}

/* ===== 无轮播时 Hero 区 ===== */
.hero-area{position:relative;min-height:78vh;display:flex;align-items:center;background:linear-gradient(135deg,#6B7B8D 0%,#7C8B9C 60%,#8C9BAD 100%);overflow:hidden}
#heroCanvas{position:absolute;inset:0}
.hero-content{position:relative;z-index:2;color:#fff;padding:80px 0}
.hero-sub{color:#d4a843;font-size:17px;letter-spacing:4px;text-transform:uppercase}
.hero-title{font-size:50px;color:#fff;font-weight:800;line-height:1.25;margin:18px 0 22px}
.hero-desc{color:#c6d3e0;max-width:720px;margin-bottom:32px;font-size:16px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
@media(max-width:768px){.hero-title{font-size:34px}}
@media(max-width:576px){.hero-title{font-size:28px}}

/* ===== 数据统计区 ===== */
.stats-area{position:relative;z-index:5;margin-top:0;background:linear-gradient(135deg,#6B7B8D,#7C8B9C);padding:0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.08);border-radius:12px;overflow:hidden;box-shadow:0 12px 32px rgba(0,0,0,.18)}
.stat-item{background:linear-gradient(135deg,#6B7B8D,#7C8B9C);text-align:center;padding:19px 20px;transition:background .3s ease}
.stat-item:hover{background:#1a3a63}
.stat-num{font-size:46px;font-weight:800;color:#d4a843;line-height:1.2}
.stat-label{color:#c6d3e0;font-size:14px;letter-spacing:2px;text-transform:uppercase;margin-top:8px}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== 产品分类入口 ===== */
.categories-section{background:#fff}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cat-card{position:relative;height:260px;border-radius:12px;overflow:hidden;display:flex;align-items:flex-end;box-shadow:0 8px 24px rgba(0,0,0,.08);transition:all .4s ease}
.cat-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(0,0,0,.18)}
.cat-bg{position:absolute;inset:0;background:linear-gradient(135deg,#6B7B8D,#7C8B9C);background-size:cover;background-position:center;transition:transform .5s ease}
.cat-card:hover .cat-bg{transform:scale(1.08)}
.cat-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(107,123,141,.05) 55%,rgba(84,99,114,.72) 100%)}
.cat-info{position:relative;z-index:2;padding:12px 18px 14px;color:#fff;width:100%;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(180deg,rgba(11,33,54,0) 0%,rgba(11,33,54,.78) 100%)}
.cat-info h3{color:#fff;font-size:15px;margin-bottom:0}
.cat-more{color:#d4a843;font-size:12px;font-weight:600;opacity:0;transform:translateY(8px);transition:all .35s ease;display:inline-block}
.cat-card:hover .cat-more{opacity:1;transform:translateY(0)}
@media(max-width:991px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.cat-grid{grid-template-columns:1fr}.cat-card{height:220px}}

/* ===== Premier Audio Driver Manufacturer ===== */
.manufacturer-section{background:#fff}
.manufacturer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.manufacturer-item{border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.06);transition:all .4s ease;background:#fff}
.manufacturer-item:hover{transform:translateY(-6px);box-shadow:0 16px 36px rgba(0,0,0,.14)}
.manufacturer-item img{width:100%;height:200px;object-fit:contain;transition:transform .5s ease;background:#f8f9fa;display:block}
.manufacturer-item:hover img{transform:scale(1.05)}
.manufacturer-title{padding:12px 14px;text-align:center;font-size:14px;font-weight:600;color:#1a365d;border-top:3px solid #d4a843;line-height:1.4;background:#fff}
.manufacturer-empty{text-align:center;color:#999;padding:30px 0}
@media(max-width:991px){.manufacturer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.manufacturer-grid{grid-template-columns:1fr}.manufacturer-item img{height:160px}}

/* ===== 精选产品 ===== */
.featured-section{background:#f8f9fa}
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.prod-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.06);transition:all .4s ease}
.prod-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(0,0,0,.16)}
.prod-img{position:relative;height:200px;overflow:hidden;background:#fff;aspect-ratio:4/3;height:auto}
.prod-img img{width:100%;height:100%;object-fit:contain;transition:transform .5s ease;padding:12px}
.prod-card:hover .prod-img img{transform:scale(1.06)}
.prod-badge{position:absolute;top:12px;left:12px;background:#d4a843;color:#1B5E9E;font-size:11px;font-weight:700;padding:4px 12px;border-radius:20px;z-index:2}
.prod-body{padding:18px}
.prod-body h3{font-size:16px;margin-bottom:8px;line-height:1.4}
.prod-body p{color:#666;font-size:13px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.prod-more{color:#c49a2c;font-size:13px;font-weight:600;display:inline-block;margin-top:10px}
@media(max-width:991px){.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.prod-grid{grid-template-columns:1fr}}

/* ===== 成功案例 ===== */
.cases-section{background:#fff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.06);transition:all .4s ease;background:#fff}
.case-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(0,0,0,.16)}
.case-img{position:relative;height:220px;overflow:hidden;background:#eef1f5;aspect-ratio:16/11;height:auto}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-img img{transform:scale(1.08)}
.case-industry{position:absolute;top:12px;left:12px;background:rgba(107,123,141,.9);color:#fff;font-size:11px;padding:4px 12px;border-radius:20px;letter-spacing:1px}
.case-savings{position:absolute;right:12px;bottom:12px;background:rgba(41,128,185,.92);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px;letter-spacing:.5px}
.case-body{padding:18px}
.case-body h3{font-size:16px;margin-bottom:6px}
.case-region{color:#999;font-size:13px}
@media(max-width:991px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.case-grid{grid-template-columns:1fr}}

/* ===== 最新新闻 ===== */
.news-section{background:#f8f9fa}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:80%;margin:0 auto}
.news-card{border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.06);transition:all .4s ease;background:#fff;display:block}
.news-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(0,0,0,.16)}
.news-img{position:relative;height:180px;overflow:hidden;background:#eef1f5;aspect-ratio:16/9;height:auto}
.news-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease}
.news-card:hover .news-img img{transform:scale(1.08)}
.news-date{position:absolute;bottom:0;left:0;background:#d4a843;color:#1B5E9E;font-size:12px;font-weight:700;padding:5px 14px;border-top-right-radius:8px}
.news-body{padding:14px 16px}
.news-cat{color:#c49a2c;font-size:12px;font-weight:600;letter-spacing:1px;text-transform:uppercase}
.news-body h3{font-size:16px;margin:6px 0 8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{color:#666;font-size:13px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
@media(max-width:991px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.news-grid{grid-template-columns:1fr}}

/* ===== CTA 区 ===== */
.cta-section{background:linear-gradient(135deg,#6B7B8D,#7C8B9C);padding:90px 0;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;right:-100px;top:-100px;width:340px;height:340px;border-radius:50%;background:rgba(212,168,67,.12)}
.cta-section::after{content:'';position:absolute;left:-80px;bottom:-120px;width:280px;height:280px;border-radius:50%;background:rgba(212,168,67,.08)}
.cta-inner{position:relative;z-index:2;text-align:center;color:#fff}
.cta-inner h2{color:#fff;font-size:40px;margin-bottom:14px}
.cta-inner p{color:#c6d3e0;max-width:640px;margin:0 auto 34px;font-size:17px}
.cta-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media(max-width:768px){.cta-inner h2{font-size:30px}}