:root{
  --orange:#F0A030;
  --orange-deep:#D98A1F;
  --red:#B01020;
  --ink:#2B2B33;
  --gray:#6B6B75;
  --bg:#FAFAF8;
  --card:#FFFFFF;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:"Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;}
img{max-width:100%;}
a{text-decoration:none;color:inherit;}

/* ===== 顶部导航 ===== */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  border-bottom:1px solid #eee;
}
.nav{
  max-width:1180px;margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;justify-content:space-between;
}
.nav .logo{height:36px;width:auto;display:block;}
.nav ul{display:flex;gap:32px;list-style:none;font-size:15px;}
.nav ul a{color:var(--ink);font-weight:500;position:relative;padding:6px 0;}
.nav ul a:hover{color:var(--orange-deep);}
.nav ul a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--orange);transition:.25s;}
.nav ul a:hover::after{width:100%;}
.nav-right{display:flex;align-items:center;gap:20px;}
.nav .phone{
  display:flex;align-items:center;gap:8px;
  font-weight:700;color:var(--orange-deep);font-size:17px;white-space:nowrap;
}
.lang-switch{
  display:flex;align-items:center;gap:6px;font-size:13px;
  border:1px solid #E2E2DC;border-radius:999px;padding:5px 14px;color:var(--gray);transition:.25s;white-space:nowrap;
}
.lang-switch:hover{border-color:var(--orange);color:var(--orange-deep);}
.lang-switch b{color:var(--ink);font-weight:600;}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:640px;
  background:linear-gradient(135deg,#1E2530 0%,#2B3542 55%,#33404F 100%);
  color:#fff;display:flex;align-items:center;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 600px 400px at 85% 20%, rgba(240,160,48,.18), transparent),
    radial-gradient(ellipse 500px 500px at 10% 90%, rgba(176,16,32,.12), transparent);
}
.hero .circuit{position:absolute;inset:0;opacity:.10;}
.hero-inner{
  position:relative;max-width:1180px;margin:0 auto;padding:80px 24px;width:100%;
  display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;
}
.hero-badge{
  display:inline-block;padding:6px 16px;border:1px solid rgba(240,160,48,.5);
  border-radius:999px;color:var(--orange);font-size:13px;letter-spacing:2px;margin-bottom:24px;
}
.hero h1{font-size:44px;line-height:1.35;font-weight:800;letter-spacing:1px;}
.hero h1 em{font-style:normal;color:var(--orange);}
.hero p.sub{margin-top:20px;font-size:17px;color:rgba(255,255,255,.72);max-width:520px;}
.hero-cta{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap;}
.btn{
  display:inline-block;padding:14px 34px;border-radius:6px;font-size:16px;font-weight:600;
  transition:.25s;cursor:pointer;border:none;
}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 22px rgba(240,160,48,.35);}
.btn-primary:hover{background:var(--orange-deep);transform:translateY(-2px);}
.btn-ghost{border:1px solid rgba(255,255,255,.4);color:#fff;}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange);}

.hero-stats{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:36px 32px;backdrop-filter:blur(4px);
}
.hero-stats .row{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.15);}
.hero-stats .row:last-child{border-bottom:none;}
.hero-stats .num{font-size:30px;font-weight:800;color:var(--orange);}
.hero-stats .num small{font-size:16px;}
.hero-stats .lbl{font-size:14px;color:rgba(255,255,255,.65);align-self:center;}

/* ===== 通用 section ===== */
section{padding:88px 0;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
.sec-head{text-align:center;margin-bottom:56px;}
.sec-head .tag{color:var(--orange-deep);font-size:14px;letter-spacing:4px;font-weight:600;}
.sec-head h2{font-size:32px;margin-top:10px;font-weight:800;}
.sec-head .line{width:56px;height:4px;background:var(--orange);margin:18px auto 0;border-radius:2px;}
.sec-head p.desc{color:var(--gray);margin-top:16px;font-size:15px;max-width:640px;margin-left:auto;margin-right:auto;}

/* ===== 业务板块 ===== */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.biz-card{
  background:var(--card);border-radius:12px;padding:38px 30px;
  border:1px solid #EFEFEA;transition:.3s;position:relative;overflow:hidden;
}
.biz-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--orange),var(--red));
  transform:scaleX(0);transform-origin:left;transition:.35s;
}
.biz-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(43,43,51,.10);}
.biz-card:hover::before{transform:scaleX(1);}
.biz-card .icon{
  width:58px;height:58px;border-radius:12px;background:#FDF3E3;
  display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:22px;
}
.biz-card h3{font-size:19px;margin-bottom:12px;}
.biz-card p{font-size:14px;color:var(--gray);}
.biz-card .items{margin-top:16px;font-size:13px;color:var(--ink);}
.biz-card .items span{display:inline-block;background:#F6F5F0;border-radius:4px;padding:3px 10px;margin:3px 4px 0 0;}

/* ===== 优势 ===== */
.adv{background:#fff;}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.adv-item{text-align:center;padding:20px 16px;}
.adv-item .num{font-size:42px;font-weight:800;color:var(--orange-deep);line-height:1.2;}
.adv-item .num small{font-size:18px;font-weight:600;}
.adv-item h4{margin-top:10px;font-size:16px;}
.adv-item p{font-size:13px;color:var(--gray);margin-top:6px;}

/* ===== 案例 ===== */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.case-card{
  background:var(--card);border-radius:12px;overflow:hidden;border:1px solid #EFEFEA;transition:.3s;
  display:flex;
}
.case-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(43,43,51,.10);}
.case-card .cover{
  width:190px;min-height:170px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  font-size:44px;color:#fff;
}
.case-card .c1{background:linear-gradient(135deg,#2B3542,#46586B);}
.case-card .c2{background:linear-gradient(135deg,#B01020,#D9534F);}
.case-card .c3{background:linear-gradient(135deg,#D98A1F,#F0A030);}
.case-card .c4{background:linear-gradient(135deg,#3D6B4F,#5E9478);}
.case-card .body{padding:26px 26px;}
.case-card .cat{font-size:12px;color:var(--orange-deep);font-weight:700;letter-spacing:1px;}
.case-card h3{font-size:17px;margin:8px 0 10px;}
.case-card p{font-size:13.5px;color:var(--gray);}

/* ===== 合作伙伴/资质 ===== */
.quals{background:#fff;}
.qual-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.qual-card{
  border:1px solid #EFEFEA;border-radius:10px;padding:28px 22px;text-align:center;background:var(--bg);transition:.3s;
}
.qual-card:hover{border-color:var(--orange);}
.qual-card .icon{font-size:34px;}
.qual-card h4{margin-top:14px;font-size:15px;}
.qual-card p{font-size:12.5px;color:var(--gray);margin-top:6px;}

/* ===== 联系 ===== */
.contact{background:linear-gradient(135deg,#1E2530,#2B3542);color:#fff;}
.contact .sec-head h2{color:#fff;}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.contact .info-item{display:flex;gap:16px;margin-bottom:26px;}
.contact .info-item .icon{
  width:46px;height:46px;border-radius:10px;background:rgba(240,160,48,.15);
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
}
.contact .info-item h4{font-size:15px;color:rgba(255,255,255,.6);font-weight:500;}
.contact .info-item p{font-size:16px;font-weight:600;margin-top:2px;}
.contact .info-item p a{color:inherit;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.25);transition:.2s;}
.contact .info-item p a:hover{color:var(--orange);border-bottom-color:var(--orange);}
.contact-form{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:34px;
}
.contact-form h3{margin-bottom:20px;font-size:18px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px;}
.contact-form input,.contact-form textarea{
  width:100%;padding:12px 14px;border-radius:6px;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;font-size:14px;font-family:inherit;
}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:rgba(255,255,255,.4);}
.contact-form textarea{height:96px;resize:vertical;margin-bottom:14px;}
.contact-form button{width:100%;}
.form-note{font-size:12px;color:rgba(255,255,255,.45);margin-top:12px;line-height:1.6;}

/* ===== footer ===== */
footer{background:#15191F;color:rgba(255,255,255,.45);padding:36px 0;font-size:13px;}
footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
footer a:hover{color:var(--orange);}
footer .icp a{color:rgba(255,255,255,.45);text-decoration:none;}
footer .icp a:hover{color:var(--orange);text-decoration:underline;}

/* 移动端浮动联系 */
.mobile-cta{display:none;}

@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;padding:56px 24px;}
  .biz-grid{grid-template-columns:1fr 1fr;}
  .adv-grid{grid-template-columns:1fr 1fr;}
  .case-grid{grid-template-columns:1fr;}
  .qual-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .nav ul{display:none;}
  .nav .phone{display:none;}
  .hero h1{font-size:32px;}
  .hero{min-height:auto;}
  section{padding:60px 0;}
  .sec-head h2{font-size:26px;}
  .mobile-cta{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:150;
    background:#fff;border-top:1px solid #eee;box-shadow:0 -4px 16px rgba(0,0,0,.06);
  }
  .mobile-cta a{
    flex:1;text-align:center;padding:14px 0;font-size:15px;font-weight:600;
  }
  .mobile-cta a:first-child{color:var(--orange-deep);border-right:1px solid #eee;}
  .mobile-cta a:last-child{background:var(--orange);color:#fff;}
  body{padding-bottom:52px;}
}
@media (max-width:600px){
  .biz-grid,.adv-grid,.qual-grid{grid-template-columns:1fr;}
  .case-card{flex-direction:column;}
  .case-card .cover{width:100%;min-height:110px;}
  .form-row{grid-template-columns:1fr;}
  .hero h1{font-size:27px;}
  .hero-stats{padding:24px 20px;}
}