/* ================================================================
   about.css — About页专有样式
   ================================================================ */

/* ============ About Banner ============ */
.about-banner{
  position:relative;
  background:var(--c-navy);
  padding:72px 0 64px;
  overflow:hidden;
}
.about-banner::before{
  content:"";position:absolute;top:0;right:0;width:0;height:0;
  border-style:solid;border-width:0 200px 200px 0;
  border-color:transparent rgba(196,150,91,.18) transparent transparent;
}
.about-banner::after{
  content:"";position:absolute;bottom:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-gold),transparent);
}
.about-banner .wrap{position:relative;z-index:2}
.about-banner .kicker{
  color:var(--c-gold);font-size:12.5px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;display:flex;align-items:center;gap:12px;margin-bottom:16px;
}
.about-banner .kicker::before{content:"";width:34px;height:2px;background:var(--c-gold)}
.about-banner h1{
  color:#fff;font-size:44px;font-weight:800;letter-spacing:-.01em;line-height:1.15;
  margin-bottom:16px;
}
.about-banner h1 em{color:var(--c-gold);font-style:normal}
.about-banner p{color:#aeb9c6;font-size:16px;max-width:620px;line-height:1.75}

/* ============ 公司简介 ============ */
.about-intro{padding:84px 0}
.about-intro .grid{
  display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center;
}
.about-intro .media{
  position:relative;aspect-ratio:4/5;overflow:hidden;
  border:1px solid var(--c-line);
}
.about-intro .media img{width:100%;height:100%;object-fit:cover}
.about-intro .media::after{
  content:"";position:absolute;bottom:-18px;left:-18px;width:100px;height:100px;
  background:var(--c-gold);z-index:-1;
}
.about-intro .media::before{
  content:"";position:absolute;top:-12px;right:-12px;width:80px;height:80px;
  border:2px solid var(--c-navy);z-index:-1;
}
.about-intro .label{
  display:inline-block;background:var(--c-gold);color:#0f1a28;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  padding:6px 14px;text-transform:uppercase;margin-bottom:20px;
}
.about-intro h2{
  font-size:34px;font-weight:800;color:var(--c-navy);
  line-height:1.2;margin-bottom:22px;
}
.about-intro h2 em{color:var(--c-gold-d);font-style:normal}
.about-intro .lead{
  font-size:16px;color:var(--c-text);line-height:1.8;margin-bottom:18px;
}
.about-intro .text p{color:var(--c-mute);font-size:15px;line-height:1.8;margin-bottom:14px}
.about-intro .signature{
  margin-top:28px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;gap:16px;
}
.about-intro .signature .avatar{
  width:56px;height:56px;border:2px solid var(--c-gold);
  overflow:hidden;
}
.about-intro .signature .avatar img{width:100%;height:100%;object-fit:cover}
.about-intro .signature .info h4{font-size:15px;font-weight:700;color:var(--c-navy)}
.about-intro .signature .info span{font-size:13px;color:var(--c-mute)}

/* ============ 数据条 ============ */
.about-stats{
  background:var(--c-navy);padding:56px 0;
}
.about-stats .grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;
  background:rgba(255,255,255,.08);
}
.about-stats .item{
  background:var(--c-navy);padding:36px 24px;text-align:center;
  transition:var(--t);
}
.about-stats .item:hover{background:var(--c-navy-2)}
.about-stats .num{
  font-size:48px;font-weight:800;color:var(--c-gold);
  line-height:1;margin-bottom:6px;letter-spacing:-.02em;
}
.about-stats .num sup{font-size:22px;font-weight:700}
.about-stats .label{
  font-size:14px;color:#aeb9c6;letter-spacing:.06em;
  text-transform:uppercase;font-weight:600;
}

/* ============ 使命愿景 ============ */
.about-mv{padding:84px 0;background:var(--c-bg)}
.about-mv .grid{
  display:grid;grid-template-columns:1fr 1fr;gap:32px;
}
.about-mv .card{
  background:#fff;border:1px solid var(--c-line);padding:40px 36px;
  position:relative;transition:var(--t);
}
.about-mv .card:hover{
  border-color:var(--c-gold);
  box-shadow:0 20px 40px -28px rgba(15,26,40,.3);
}
.about-mv .card::before{
  content:"";position:absolute;top:0;left:0;width:60px;height:3px;background:var(--c-gold);
}
.about-mv .card .ic{
  width:56px;height:56px;background:var(--c-navy);color:var(--c-gold);
  display:flex;align-items:center;justify-content:center;
  font-size:26px;font-weight:700;margin-bottom:20px;
}
.about-mv .card h3{
  font-size:22px;font-weight:800;color:var(--c-navy);
  margin-bottom:14px;
}
.about-mv .card p{
  color:var(--c-mute);font-size:15px;line-height:1.8;margin-bottom:14px;
}
.about-mv .card ul{margin-top:14px}
.about-mv .card ul li{
  padding:8px 0 8px 24px;position:relative;
  font-size:14.5px;color:var(--c-text);
}
.about-mv .card ul li::before{
  content:"✓";position:absolute;left:0;top:8px;
  color:var(--c-gold);font-weight:800;font-size:14px;
}

/* ============ 核心优势 ============ */
.about-adv{padding:84px 0}
.about-adv .head{text-align:center;margin-bottom:50px}
.about-adv .head .kicker{justify-content:center}
.about-adv .head h2{max-width:700px;margin:0 auto}
.about-adv .grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.about-adv .item{
  background:#fff;border:1px solid var(--c-line);padding:36px 32px;
  transition:var(--t);position:relative;
}
.about-adv .item:hover{
  border-color:var(--c-gold);
  box-shadow:0 22px 40px -28px rgba(15,26,40,.35);
  transform:translateY(-4px);
}
.about-adv .item::after{
  content:"";position:absolute;top:0;left:0;width:0;height:3px;
  background:var(--c-gold);transition:width .4s ease;
}
.about-adv .item:hover::after{width:100%}
.about-adv .item .ic{
  width:60px;height:60px;background:var(--c-bg);color:var(--c-gold-d);
  display:flex;align-items:center;justify-content:center;
  font-size:28px;font-weight:700;margin-bottom:22px;
  transition:var(--t);
}
.about-adv .item:hover .ic{background:var(--c-navy);color:var(--c-gold)}
.about-adv .item h3{
  font-size:19px;font-weight:800;color:var(--c-navy);
  margin-bottom:12px;
}
.about-adv .item p{
  color:var(--c-mute);font-size:14.5px;line-height:1.75;
}

/* ============ 工厂展示 ============ */
.about-factory{padding:84px 0;background:var(--c-bg)}
.about-factory .head{text-align:center;margin-bottom:48px}
.about-factory .head .kicker{justify-content:center}
.about-factory .head h2{max-width:700px;margin:0 auto}
.about-factory .gallery{
  display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:220px 220px;gap:20px;
}
.about-factory .gallery .ph{
  overflow:hidden;border:1px solid var(--c-line);position:relative;
}
.about-factory .gallery .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.about-factory .gallery .ph:hover img{transform:scale(1.06)}
.about-factory .gallery .ph:first-child{grid-row:span 2}
.about-factory .gallery .ph .cap{
  position:absolute;left:0;right:0;bottom:0;
  background:linear-gradient(transparent,rgba(15,26,40,.85));
  padding:40px 18px 14px;color:#fff;font-size:13px;letter-spacing:.02em;
}
.about-factory .gallery .ph .cap b{
  display:block;font-size:15px;font-weight:700;margin-bottom:2px;color:var(--c-gold);
}

/* ============ 资质认证 ============ */
.about-certs{padding:84px 0}
.about-certs .head{text-align:center;margin-bottom:48px}
.about-certs .head .kicker{justify-content:center}
.about-certs .head h2{max-width:700px;margin:0 auto}
.about-certs .grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.about-certs .item{
  background:#fff;border:1px solid var(--c-line);padding:32px 24px;
  text-align:center;transition:var(--t);
}
.about-certs .item:hover{
  border-color:var(--c-gold);
  box-shadow:0 16px 36px -24px rgba(15,26,40,.3);
}
.about-certs .item .badge{
  width:72px;height:72px;border:2px solid var(--c-gold);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
  font-size:24px;font-weight:800;color:var(--c-gold-d);letter-spacing:-.02em;
}
.about-certs .item h4{
  font-size:15px;font-weight:700;color:var(--c-navy);
  margin-bottom:6px;
}
.about-certs .item p{
  font-size:12.5px;color:var(--c-mute);line-height:1.5;
}

/* ============ CTA ============ */
.about-cta{
  background:var(--c-navy);padding:56px 0;text-align:center;
  position:relative;overflow:hidden;
}
.about-cta::before{
  content:"";position:absolute;top:0;left:0;width:0;height:0;
  border-style:solid;border-width:80px 80px 0 0;
  border-color:var(--c-gold) transparent transparent transparent;
}
.about-cta::after{
  content:"";position:absolute;bottom:0;right:0;width:0;height:0;
  border-style:solid;border-width:0 80px 80px 0;
  border-color:transparent transparent transparent var(--c-gold);
}
.about-cta h2{
  color:#fff;font-size:30px;font-weight:800;margin-bottom:14px;
}
.about-cta h2 em{color:var(--c-gold);font-style:normal}
.about-cta p{color:#aeb9c6;font-size:15px;margin-bottom:26px;max-width:560px;margin-left:auto;margin-right:auto}
.about-cta .btn-primary{
  background:var(--c-gold);color:#0f1a28;border:none;cursor:pointer;
  padding:14px 36px;font-size:14px;font-weight:700;letter-spacing:.06em;
  font-family:inherit;transition:var(--t);
  clip-path:polygon(0 0,100% 0,92% 100%,0 100%);
}
.about-cta .btn-primary:hover{background:#fff}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  .about-intro .grid{grid-template-columns:1fr;gap:40px}
  .about-intro .media{max-width:440px;aspect-ratio:16/10}
  .about-adv .grid{grid-template-columns:repeat(2,1fr)}
  .about-certs .grid{grid-template-columns:repeat(2,1fr)}
  .about-factory .gallery{grid-template-columns:1fr 1fr;grid-template-rows:200px 200px 200px}
  .about-factory .gallery .ph:first-child{grid-row:span 1;grid-column:span 2}
}
@media(max-width:768px){
  .about-banner{padding:52px 0 44px}
  .about-banner h1{font-size:30px}
  .about-banner p{font-size:14px}
  .about-intro{padding:56px 0}
  .about-intro h2{font-size:26px}
  .about-stats{padding:40px 0}
  .about-stats .grid{grid-template-columns:repeat(2,1fr)}
  .about-stats .item{padding:28px 16px}
  .about-stats .num{font-size:36px}
  .about-mv{padding:56px 0}
  .about-mv .grid{grid-template-columns:1fr}
  .about-mv .card{padding:28px 24px}
  .about-adv{padding:56px 0}
  .about-adv .grid{grid-template-columns:1fr;gap:20px}
  .about-factory{padding:56px 0}
  .about-factory .gallery{grid-template-columns:1fr;grid-template-rows:auto}
  .about-factory .gallery .ph{height:200px}
  .about-factory .gallery .ph:first-child{grid-column:span 1;grid-row:auto}
  .about-certs{padding:56px 0}
  .about-certs .grid{grid-template-columns:1fr 1fr;gap:16px}
  .about-cta{padding:44px 0}
  .about-cta h2{font-size:22px}
  .about-cta p{font-size:14px}
}