:root{
  --red-900:#a3000c;
  --red-700:#c5000e;
  --red-600:#e50011;
  --red-050:#fef3f4;
  --ink:#333333;
  --muted:#666666;
  --light:#999999;
  --line:#ececec;
  --bg:#fafafa;
  --radius-lg:18px;
  --radius-md:14px;
  --shadow-sm:0 6px 20px rgba(229,0,17,.06);
  --shadow-md:0 16px 40px rgba(229,0,17,.13);
}
#brand{display:none;}
.appx .nav-link,.appx .plain,.appx .tool-btn{color:#333;}
.appx button.burger{color:#333;}

/* ============ 首屏 Hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  color:#333;
  padding:120px 0 150px;
  background:url(../images/about_brand.jpg) no-repeat bottom;
  background-size:cover;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:58px 58px;
  pointer-events:none;
}
.hero .container{position:relative;z-index:1;}

.hero-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:60px;
  align-items:center;
}

.hero-badge{
  display:inline-block;
  margin-bottom:24px;
  padding:7px 22px;
  font-size:13.5px;
  letter-spacing:1.2px;
  color:#333;
  background:rgba(0,0,0,.14);
  border:1px solid rgba(0,0,0,.3);
  border-radius:999px;
  backdrop-filter:blur(6px);
}
.hero h1{
  font-size:clamp(28px,3.6vw,40px);
  font-weight:700;
  letter-spacing:2px;
  line-height:1.35;
  margin-bottom:20px;
  animation:fadeUp .8s ease both;
}
.hero-lead{
  margin:0 0 34px;
  font-size:16px;
  line-height:2.05;
  color:rgba(0,0,0,.93);
  animation:fadeUp .8s .12s ease both;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  animation:fadeUp .8s .24s ease both;
}

/* 右侧数据方块 */
.hero-panel{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  animation:fadeUp .8s .3s ease both;
}
.hero-panel-item{
  padding:22px 18px;
  text-align:center;
  background:rgba(255,255,255,.4);
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius-md);
  backdrop-filter:blur(6px);
  transition:all .3s ease;
}
.hero-panel-item:hover{
  background:rgba(255,255,255,.18);
  transform:translateY(-3px);
}
.hero-panel-item em{
  display:block;
  margin-bottom:8px;
  font-size:24px;
  color:#333;
  opacity:.95;
}
.hero-panel-item strong{
  display:block;
  font-size:18px;
  font-weight:700;
  letter-spacing:.5px;
  color:#333;
}
.hero-panel-item span{
  font-size:13px;
  color:rgba(0,0,0,.78);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-block;
  padding:14px 36px;
  font-size:15.5px;
  font-weight:600;
  letter-spacing:1px;
  border-radius:999px;
  border:2px solid transparent;
  transition:all .3s ease;
}
.btn-primary{background:#fff;color:var(--red-600);}
.btn-primary:hover{transform:translateY(-3px);}
.btn-ghost{border-color:var(--red-600);color:var(--red-600);}
.btn-ghost:hover{background:var(--red-600);color:#fff;transform:translateY(-3px);}

/* ============ 区块通用 ============ */
.section{padding:82px 0;}
.section-white{background:#fff;}
.section-tint{background:var(--bg);}
.section-tint#fzlc{background:url(../images/about_fzbg.jpg)}

.section-head{
  max-width:860px;
  margin:0 auto 54px;
  text-align:center;
}
.section-title{
  position:relative;
  display:inline-block;
  padding-bottom:16px;
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
  letter-spacing:1.2px;
  color:var(--ink);
}
.section-title::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  transform:translateX(-50%);
  width:64px;
  height:4px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--red-900),var(--red-600));
}

.section-sub{
  margin-top:18px;
  font-size:15.5px;
  color:var(--muted);
}

.section-tint#fzlc .section-title,
.section-tint#fzlc .section-sub,
.section-tint#hezuo .section-title,
.section-tint#hezuo .section-sub{color:#fff;}

/* ============ 品牌概述（左标题 + 右卡片网格） ============ */
.brand-layout{
  display:grid;
  grid-template-columns:340px 1fr;
  gap:50px;
  align-items:start;
}

.brand-aside .media{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:12px;
  aspect-ratio:4/5;
  min-height:280px;
  transition:all .3s ease;
  overflow:hidden;
}

.brand-aside .media img{
    display:block;
    width:100%;
    height:100%;
}
.brand-aside .media:hover{
  border-color:var(--red-600);
}
.brand-aside .media i{font-size:44px;opacity:.45;}

.brand-aside .aside-text{
  margin-top:24px;
  padding:20px 22px;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
  background:var(--red-050);
  border-left:4px solid var(--red-600);
}

.brand-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.brand-card{
  position:relative;
  padding:26px 24px;
  background:#fff;
  border:1px solid var(--line);
  transition:all .3s ease;
}
.brand-card:hover{
  transform:translateY(-5px);
  border-color:#f5d5d8;
}
/* 第一张卡片跨两列 */
.brand-card:first-child{
  grid-column:1 / -1;
  display:flex;
  gap:22px;
  align-items:flex-start;
}
.brand-card:first-child .brand-icon{
  flex-shrink:0;
}

.brand-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:50px;
  height:50px;
  margin-bottom:16px;
  border-radius:14px;
  color:var(--red-600);
  background:linear-gradient(135deg,#fde7e8,#fbd2d5);
  transition:transform .3s ease;
}
.brand-card:hover .brand-icon{transform:scale(1.08) rotate(-5deg);}
.brand-icon i{font-size:21px;}

.brand-card h3{
  margin-bottom:8px;
  font-size:17px;
  font-weight:700;
  letter-spacing:.4px;
  color:var(--ink);
}
.brand-card p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
}
.brand-card:first-child .brand-body{flex:1;}

/* ============ 发展历程（横向时间轴） ============ */
.timeline{
  position:relative;
  padding:20px 0 10px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:50%;
  top:0;
  bottom:0;
  width:2px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(229,0,17,.15),var(--red-600),rgba(229,0,17,.15));
}

.tl-row{
  position:relative;
  display:grid;
  grid-template-columns:1fr 60px 1fr;
  align-items:center;
}
.tl-row:last-child{margin-bottom:0;}

.tl-spacer{}

.tl-node{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  margin:0 auto;
  border-radius:50%;
  color:#fff;
  background:linear-gradient(135deg,var(--red-900),var(--red-600));
  box-shadow:0 8px 18px rgba(229,0,17,.28);
  transition:transform .3s ease;
}
.tl-row:hover .tl-node{transform:scale(1.1);}
.tl-node i{font-size:15px;}

.tl-card{
  padding:22px 26px;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, .2);
  transition:all .3s ease;
}
.tl-card:hover{
  transform:translateY(-4px);
}
.tl-card h4{
  margin-bottom:8px;
  font-size:17px;
  font-weight:700;
  letter-spacing:.4px;
  color:#fff;
}
.tl-card p{
  font-size:14.8px;
  line-height:1.85;
  color:#fff;
  opacity:.6;
}

/* 左右交替 */
.tl-row:nth-child(odd) .tl-card{grid-column:1;}
.tl-row:nth-child(odd) .tl-spacer{grid-column:3;}
.tl-row:nth-child(even) .tl-card{grid-column:3;}
.tl-row:nth-child(even) .tl-spacer{grid-column:1;}

/* ============ 五大核心实力 ============ */
.grid-5{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.card{
  position:relative;
  padding:34px 28px;
  background:#fff;
  border:1px solid #f0f0f0;
  transition:all .3s ease;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--red-900),var(--red-600));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .35s ease;
}
.card:hover{
  transform:translateY(-6px);
  border-color:#f5d5d8;
}
.card:hover::before{transform:scaleX(1);}

/* 前两张卡片跨列突出 */
.card:nth-child(1),
.card:nth-child(2){
  grid-column:span 3;
  display:flex;
  align-items:center;
  gap:28px;
  padding:36px 36px;
}
.card:nth-child(1) .card-icon,
.card:nth-child(2) .card-icon{
  flex-shrink:0;
  margin-bottom:0;
  width:64px;
  height:64px;
}
.card:nth-child(1) .card-icon i,
.card:nth-child(2) .card-icon i{font-size:26px;}

.card-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:52px;
  height:52px;
  margin-bottom:18px;
  border-radius:14px;
  color:var(--red-600);
  background:linear-gradient(135deg,#fde7e8,#fbd2d5);
  transition:transform .3s ease;
}
.card:hover .card-icon{transform:scale(1.06) rotate(-4deg);}
.card-icon i{font-size:22px;}

.card h3{
  margin-bottom:10px;
  font-size:17.5px;
  font-weight:700;
  letter-spacing:.4px;
  color:var(--ink);
}
.card p{
  font-size:14.8px;
  line-height:1.85;
  color:var(--muted);
}

/* ============ 合作优势（四列图标卡） ============ */
.adv-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.adv-item{
  padding:32px 24px;
  text-align:center;
  background:#fff;
  border:1px solid var(--line);
  transition:all .3s ease;
}
.adv-item:hover{
  transform:translateY(-6px);
  border-color:#f5d5d8;
}
.adv-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:60px;
  height:60px;
  margin:0 auto 18px;
  border-radius:50%;
  color:#fff;
  background:linear-gradient(135deg,var(--red-900),var(--red-600));
  transition:transform .35s ease;
}
.adv-item:hover .adv-icon{transform:scale(1.08) rotate(-5deg);}
.adv-icon i{font-size:24px;}

.adv-item h3{
  margin-bottom:10px;
  font-size:16.5px;
  font-weight:700;
  letter-spacing:.4px;
  color:var(--ink);
}
.adv-item p{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  text-align:left;
}

/* ============ 底部 CTA ============ */
.cta{
  position:relative;
  overflow:hidden;
  padding:86px 0;
  text-align:center;
  color:#fff;
  background:
    radial-gradient(circle at 80% 10%, rgba(255,90,100,.4), transparent 50%),
    linear-gradient(135deg,#5c0006,#e50011);
}
.cta h2{
  font-size:clamp(22px,2.8vw,30px);
  letter-spacing:1.2px;
  margin-bottom:14px;
}
.cta p{
  margin:0 auto 34px;
  font-size:17px;
  color:rgba(255,255,255,.92);
}
.cta .btn-primary{
  padding:16px 46px;
  font-size:18px;
  font-weight:700;
  color:var(--red-600);
}
.cta .btn-primary:hover{
  box-shadow:0 16px 34px rgba(0,0,0,.28);
}

/* ============ 响应式 ============ */

/* —— 1380px 大屏适配 —— */
@media (max-width:1380px){
  .hero{padding:90px 0 74px;}
  .hero-grid{grid-template-columns:1.15fr 1fr;gap:48px;}
  .hero h1{letter-spacing:1.6px;margin-bottom:18px;}
  .hero-lead{font-size:15.5px;margin-bottom:30px;}
  .hero-badge{margin-bottom:20px;padding:6px 20px;font-size:13px;}
  .hero-panel{gap:12px;}
  .hero-panel-item{padding:20px 16px;}
  .hero-panel-item em{font-size:22px;}
  .hero-panel-item strong{font-size:17px;}

  .section{padding:74px 0;}
  .section-head{margin-bottom:48px;}

  .brand-layout{grid-template-columns:300px 1fr;gap:42px;}
  .brand-aside .aside-text{padding:18px 20px;font-size:14.5px;}
  .brand-cards{gap:16px;}
  .brand-card{padding:24px 22px;}

  .timeline{padding:16px 0 8px;}
  .tl-row{grid-template-columns:1fr 54px 1fr;}
  .tl-card{padding:20px 22px;}
  .tl-card h4{font-size:16.5px;}
  .tl-card p{font-size:14.5px;}

  .grid-5{gap:20px;}
  .card{padding:30px 26px;}
  .card:nth-child(1),
  .card:nth-child(2){padding:32px 32px;gap:26px;}

  .adv-grid{gap:20px;}
  .adv-item{padding:28px 22px;}
  .adv-icon{width:56px;height:56px;}
  .adv-icon i{font-size:23px;}

  .cta{padding:78px 0;}
}

@media (max-width:1280px){
  .hero{padding:82px 0 68px;}
  .hero-grid{grid-template-columns:1.1fr 1fr;gap:38px;}
  .hero-badge{margin-bottom:18px;padding:6px 18px;font-size:12.5px;}
  .hero h1{letter-spacing:1.4px;margin-bottom:16px;line-height:1.32;}
  .hero-lead{font-size:15px;margin-bottom:26px;}
  .hero-actions{gap:12px;}
  .hero-panel{gap:11px;}
  .hero-panel-item{padding:18px 14px;}
  .hero-panel-item em{font-size:20px;margin-bottom:6px;}
  .hero-panel-item strong{font-size:16px;}
  .hero-panel-item span{font-size:12.5px;}

  .btn{padding:13px 30px;font-size:15px;}

  .section{padding:68px 0;}
  .section-head{margin-bottom:44px;}
  .section-sub{font-size:15px;}

  .brand-layout{grid-template-columns:280px 1fr;gap:36px;}
  .brand-aside .aside-text{margin-top:20px;padding:17px 19px;font-size:14px;line-height:1.85;}
  .brand-cards{gap:15px;}
  .brand-card{padding:22px 20px;}
  .brand-card h3{font-size:16.5px;}
  .brand-card p{font-size:14px;}
  .brand-icon{width:46px;height:46px;border-radius:12px;margin-bottom:14px;}
  .brand-icon i{font-size:19px;}

  .timeline{padding:14px 0 6px;}
  .tl-row{grid-template-columns:1fr 50px 1fr;}
  .tl-node{width:36px;height:36px;}
  .tl-node i{font-size:14px;}
  .tl-card{padding:18px 20px;}
  .tl-card h4{font-size:16px;}
  .tl-card p{font-size:14px;}

  .grid-5{gap:18px;}
  .card{padding:28px 24px;}
  .card h3{font-size:17px;}
  .card p{font-size:14.5px;}
  .card:nth-child(1),
  .card:nth-child(2){padding:30px 28px;gap:24px;}
  .card:nth-child(1) .card-icon,
  .card:nth-child(2) .card-icon{width:58px;height:58px;}
  .card:nth-child(1) .card-icon i,
  .card:nth-child(2) .card-icon i{font-size:24px;}

  .adv-grid{gap:18px;}
  .adv-item{padding:26px 20px;}
  .adv-icon{width:54px;height:54px;margin-bottom:16px;}
  .adv-icon i{font-size:22px;}
  .adv-item h3{font-size:16px;}
  .adv-item p{font-size:13.5px;}

  .cta{padding:72px 0;}
  .cta p{font-size:16px;margin-bottom:30px;}
}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-panel{max-width:520px;}
  .brand-layout{grid-template-columns:1fr;gap:36px;}
  .brand-aside .media{aspect-ratio:16/7;min-height:200px;}
  .grid-5{grid-template-columns:1fr 1fr;}
  .card:nth-child(1),
  .card:nth-child(2){grid-column:1 / -1;padding:30px 28px;}
  .adv-grid{grid-template-columns:1fr 1fr;gap:18px;}
}

@media (max-width:900px){
  .section{padding:56px 0;}
  .hero{padding:70px 0 60px;background:url(../images/about_brand_phone.jpg) no-repeat center;background-size:cover;}
  .section-head{margin-bottom:36px;}
  .cta{padding:60px 0;}
  .container{padding:0 20px;}

  /* 首屏单列 */
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-panel{max-width:100%;gap:12px;}
  .hero-panel-item{padding:18px 14px;}
  .hero h1{font-size:clamp(24px,5vw,34px);letter-spacing:1.2px;}
  .hero-lead{font-size:15px;margin-bottom:26px;}
  .hero-badge{font-size:12.5px;padding:6px 16px;}

  /* 品牌概述单列 */
  .brand-layout{grid-template-columns:1fr;gap:30px;}
  .brand-aside .media{aspect-ratio:inherit;min-height:inherit;}
  .brand-aside .aside-text{margin-top:18px;padding:16px 18px;font-size:14px;}

  /* 品牌卡片单列 */
  .brand-cards{grid-template-columns:1fr;gap:14px;}
  .brand-card{padding:22px 20px;}
  .brand-card:first-child{grid-column:1;flex-direction:column;gap:0;}
  .brand-card:first-child .brand-icon{margin-bottom:14px;}

  /* 时间轴保持左侧线 */
  .timeline::before{left:20px;transform:none;}
  .tl-row{
    grid-template-columns:44px 1fr;
    gap:0 16px;
    margin-bottom:24px;
  }
  .tl-node{
    grid-column:1;
    margin:0;
    width:36px;
    height:36px;
  }
  .tl-card,
  .tl-row:nth-child(odd) .tl-card,
  .tl-row:nth-child(even) .tl-card{
    grid-column:2;
  }
  .tl-spacer,
  .tl-row:nth-child(odd) .tl-spacer,
  .tl-row:nth-child(even) .tl-spacer{display:none;}

  /* 核心实力单列 */
  .grid-5{grid-template-columns:1fr;gap:16px;}
  .card{padding:24px 20px;}
  .card:nth-child(1),
  .card:nth-child(2){
    grid-column:1;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:26px 22px;
  }
  .card:nth-child(1) .card-icon,
  .card:nth-child(2) .card-icon{
    width:52px;
    height:52px;
    margin-bottom:16px;
  }
  .card:nth-child(1) .card-icon i,
  .card:nth-child(2) .card-icon i{font-size:22px;}

  /* 合作优势单列 */
  .adv-grid{grid-template-columns:1fr;gap:16px;}
  .adv-item{padding:24px 20px;}
  .adv-icon{width:52px;height:52px;margin-bottom:14px;}
  .adv-icon i{font-size:21px;}
  .adv-item h3{font-size:15.5px;}
  .adv-item p{font-size:13.5px;}

  /* 按钮与 CTA */
  .btn{padding:12px 28px;font-size:15px;}
  .cta h2{font-size:clamp(20px,4vw,26px);}
  .cta p{font-size:15px;margin-bottom:26px;}
  .cta .btn-primary{padding:14px 34px;font-size:16px;}
}

@media (max-width:640px){
  .brand-cards{grid-template-columns:1fr;}
  .brand-card:first-child{
    grid-column:1;
    flex-direction:column;
    gap:0;
  }
  .grid-5{grid-template-columns:1fr;}
  .card:nth-child(1),
  .card:nth-child(2){
    flex-direction:column;
    align-items:flex-start;
    gap:0;
  }
  .card:nth-child(1) .card-icon,
  .card:nth-child(2) .card-icon{margin-bottom:18px;}
  .adv-grid{grid-template-columns:1fr;}
}

@media (max-width:560px){
  body{font-size:15px;}
  .container{padding:0 18px;}
  .hero{padding:80px 0 65%;}
  .hero h1{font-size:clamp(20px,3.6vw,42px);}
  .hero-lead{font-size:13px;line-height:1.55}
  .hero-panel{gap:10px;}
  .hero-panel-item{padding:18px 12px;}
  .hero-panel-item strong{font-size:16px;}
  .hero-panel-item span{font-size:12px;}
  .hero-actions{gap:10px;}
  .btn{padding:12px 24px;font-size:14.5px;}
  .cta .btn-primary{padding:14px 34px;font-size:16px;}
  .card{padding:26px 22px;}
  .adv-item{padding:26px 20px;}
  .adv-icon{width:52px;height:52px;}
  .adv-icon i{font-size:21px;}
  .adv-item h3{font-size:15.5px;}
  .adv-item p{font-size:13.5px;}
  .tl-card{padding:18px 20px;}
  .tl-card h4{font-size:15.5px;}
  .tl-card p{font-size:14px;}
}