/* ============ 基础 ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy-900:#0A1C2E;
  --navy-800:#0F2E4B;
  --navy-700:#17456B;
  --red:#D6202B;
  --red-dark:#AE1620;
  --ink:#132030;
  --text:#42525F;
  --muted:#8593A1;
  --line:#E6EBF0;
  --soft:#F5F7FA;
  --white:#fff;
  --max:1200px;
  --r:8px;
  --shadow-sm:0 2px 12px rgba(10,28,46,.06);
  --shadow-md:0 22px 48px -22px rgba(10,28,46,.45);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  color:var(--text);background:var(--white);line-height:1.75;font-size:15px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
::selection{background:var(--red);color:#fff}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
section{scroll-margin-top:92px}

/* ============ 顶栏 ============ */
.topbar{
  background:var(--navy-900);color:rgba(255,255,255,.72);font-size:12.5px;
  letter-spacing:.02em;
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:10px;white-space:nowrap}
.topbar svg{width:14px;height:14px;flex:none;stroke:var(--red);opacity:.95}
.topbar a{color:#fff;font-weight:600;letter-spacing:.04em}
.topbar a:hover{color:#FFC9CC}
.topbar-right{color:rgba(255,255,255,.5)}
.topbar-right span{letter-spacing:.14em;font-size:11.5px;text-transform:uppercase}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(10px);box-shadow:0 1px 0 var(--line)}
.nav-bar{height:76px;transition:height .3s ease}
.nav-bar .wrap{display:flex;align-items:center;height:100%;gap:32px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{
  width:46px;height:46px;border-radius:9px;flex:none;
  background:linear-gradient(140deg,#E22B36,#A5111B);
  display:grid;place-items:center;color:#fff;font-size:22px;font-weight:800;
  box-shadow:0 8px 18px -8px rgba(214,32,43,.9);
  position:relative;overflow:hidden;
}
.brand-mark::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.22),transparent 55%)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-cn{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.12em}
.brand-en{font-size:9px;letter-spacing:.2em;color:var(--muted);margin-top:4px;font-weight:600}
.nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:#2C3A48;
  transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--red);transform:scaleX(0);transform-origin:center;transition:transform .28s cubic-bezier(.4,0,.2,1);
}
.nav a:hover{color:var(--red)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav a.active{color:var(--red);font-weight:600}
.header-cta{flex:none;margin-left:8px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:4px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .25s ease;white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-red{background:var(--red);color:#fff;box-shadow:0 10px 22px -12px rgba(214,32,43,.9)}
.btn-red:hover{background:var(--red-dark);transform:translateY(-1px);box-shadow:0 14px 26px -12px rgba(214,32,43,.95)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-dark{background:var(--navy-800);color:#fff}
.btn-dark:hover{background:var(--navy-900)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;margin-left:auto}
.nav-toggle span{width:20px;height:2px;background:var(--ink);transition:.3s;border-radius:2px}

/* ============ Hero ============ */
.hero{position:relative;min-height:min(86vh,720px);display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--navy-900)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 62%;transform:scale(1.02)}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(100deg,rgba(6,18,30,.94) 0%,rgba(6,18,30,.88) 34%,rgba(6,18,30,.52) 58%,rgba(6,18,30,.16) 100%),
    linear-gradient(180deg,rgba(6,18,30,.55) 0%,transparent 30%);
}
.hero-inner{position:relative;z-index:2;padding:110px 0 130px;max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:600;
  letter-spacing:.18em;color:var(--red);text-transform:uppercase;
}
.hero .eyebrow{color:rgba(255,255,255,.85)}
.adv .sec-head .eyebrow{color:#FF7A80}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red)}
.hero h1{
  font-size:clamp(32px,4.4vw,54px);line-height:1.22;font-weight:800;letter-spacing:.01em;
  margin:22px 0 20px;text-shadow:0 2px 24px rgba(0,0,0,.3);
}
.hero h1 em{font-style:normal;color:#fff;position:relative;white-space:nowrap}
.hero h1 em::after{
  content:"";position:absolute;left:-2px;right:-2px;bottom:-1px;height:8px;
  background:var(--red);z-index:-1;
}
.hero p{font-size:16.5px;line-height:1.9;color:rgba(255,255,255,.82);max-width:520px}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero-tags{display:flex;gap:26px;margin-top:38px;flex-wrap:wrap}
.hero-tags span{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.7)}
.hero-tags svg{width:16px;height:16px;stroke:#4ADE80;flex:none}

/* 数据条 */
.stats-wrap{position:relative;z-index:5;margin-top:-64px}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:6px;
  box-shadow:var(--shadow-md);border:1px solid rgba(10,28,46,.05);overflow:hidden;
}
.stat{padding:30px 26px;position:relative;text-align:center}
.stat+.stat{border-left:1px solid var(--line)}
.stat b{display:block;font-size:34px;line-height:1;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.stat b i{font-style:normal;font-size:16px;font-weight:700;color:var(--red);margin-left:3px;vertical-align:2px}
.stat span{display:block;margin-top:10px;font-size:13px;color:var(--muted);letter-spacing:.06em}

/* ============ 通用区块 ============ */
.sec{padding:96px 0}
.sec-soft{background:var(--soft)}
.sec-head{margin-bottom:52px;max-width:720px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.sec-head.center .eyebrow::before{display:none}
.sec-head .eyebrow{color:var(--red);letter-spacing:.16em;font-size:12px}
.sec-head .eyebrow::before{background:var(--red)}
.sec-head h2{
  font-size:clamp(26px,3vw,38px);line-height:1.3;font-weight:800;color:var(--ink);
  margin:16px 0 14px;letter-spacing:.01em;
}
.sec-head p{font-size:15.5px;color:#5C6B79;line-height:1.9}
.sec-head.center p{max-width:600px;margin:0 auto}

/* ============ 业务范围 ============ */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.biz-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;transition:transform .35s cubic-bezier(.22,1,.36,1),box-shadow .35s,border-color .35s;
}
.biz-card:hover{transform:translateY(-8px);box-shadow:0 30px 46px -28px rgba(10,28,46,.5);border-color:transparent}
.biz-media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--navy-800)}
.biz-media img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.22,1,.36,1)}
.biz-card:hover .biz-media img{transform:scale(1.07)}
.biz-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(8,22,36,.72) 100%)}
.biz-num{
  position:absolute;top:14px;left:16px;z-index:2;font-size:12px;font-weight:700;letter-spacing:.12em;
  color:#fff;background:var(--red);padding:4px 9px;border-radius:3px;
}
.biz-title{
  position:absolute;left:20px;right:20px;bottom:16px;z-index:2;color:#fff;
  font-size:17.5px;font-weight:700;letter-spacing:.04em;
}
.biz-body{padding:22px 22px 26px}
.biz-body p{font-size:13.5px;line-height:1.85;color:#62707E;min-height:76px}
.biz-link{
  display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:13px;
  font-weight:600;color:var(--red);letter-spacing:.04em;
}
.biz-link svg{width:14px;height:14px;transition:transform .25s}
.biz-card:hover .biz-link svg{transform:translateX(4px)}

/* ============ 服务优势（深色） ============ */
.adv{position:relative;background:var(--navy-900);color:#fff;overflow:hidden}
.adv::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 88% 8%,rgba(214,32,43,.22),transparent 62%),
    radial-gradient(700px 400px at 5% 90%,rgba(23,69,107,.6),transparent 65%);
}
.adv .wrap{position:relative;z-index:2}
.adv .sec-head h2{color:#fff}
.adv .sec-head p{color:rgba(255,255,255,.66)}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.11);border:1px solid rgba(255,255,255,.11);border-radius:var(--r);overflow:hidden}
.adv-item{background:rgba(10,28,46,.55);padding:34px 30px;transition:background .3s}
.adv-item:hover{background:rgba(23,69,107,.55)}
.adv-ico{
  width:48px;height:48px;border-radius:8px;display:grid;place-items:center;margin-bottom:20px;
  background:rgba(214,32,43,.14);border:1px solid rgba(214,32,43,.4);
}
.adv-ico svg{width:23px;height:23px;stroke:#FF6B73;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.adv-item h3{font-size:17px;font-weight:700;margin-bottom:10px;letter-spacing:.03em}
.adv-item p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6)}

/* ============ 关于我们 ============ */
.about-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.about-media{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-md)}
.about-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.about-media::before{
  content:"";position:absolute;top:0;left:0;width:0;height:0;z-index:2;
  border-style:solid;border-width:78px 78px 0 0;border-color:var(--red) transparent transparent transparent;
}
.about-media-tag{
  position:absolute;top:14px;left:14px;z-index:3;color:#fff;font-size:12px;font-weight:700;
  writing-mode:vertical-rl;letter-spacing:.2em;
}
.about-badge{
  position:absolute;right:0;bottom:0;z-index:3;background:#fff;padding:20px 26px;
  display:flex;align-items:center;gap:14px;box-shadow:-8px -8px 30px -12px rgba(0,0,0,.2);
}
.about-badge b{font-size:32px;font-weight:800;color:var(--red);line-height:1;letter-spacing:-.02em}
.about-badge span{font-size:12.5px;color:var(--muted);line-height:1.5;letter-spacing:.08em}
.about-text h2{font-size:clamp(25px,2.7vw,34px);font-weight:800;color:var(--ink);line-height:1.35;margin:16px 0 20px}
.about-text p{font-size:14.8px;line-height:2;color:#54636F;margin-bottom:16px}
.about-list{list-style:none;margin:26px 0 30px;display:grid;gap:12px}
.about-list li{display:flex;align-items:flex-start;gap:11px;font-size:14px;color:#3B4A57}
.about-list svg{width:18px;height:18px;flex:none;margin-top:3px;stroke:var(--red);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* 资质 */
.cert-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.cert{font-size:12.5px;color:var(--navy-700);background:#EDF3F9;border:1px solid #DCE7F2;border-radius:4px;padding:7px 13px;letter-spacing:.04em}

/* ============ 服务流程 ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:10px;counter-reset:step}
.flow-item{position:relative;padding:0 26px 0 0}
.flow-item:not(:last-child)::after{
  content:"";position:absolute;top:26px;left:56px;right:14px;height:1px;
  border-top:1px dashed #C8D3DE;
}
.flow-step{
  width:54px;height:54px;border-radius:50%;display:grid;place-items:center;position:relative;z-index:1;
  background:#fff;border:1px solid var(--line);color:var(--navy-800);font-weight:800;font-size:16px;
  box-shadow:var(--shadow-sm);transition:.3s;
}
.flow-item:hover .flow-step{background:var(--red);color:#fff;border-color:var(--red);transform:translateY(-3px);box-shadow:0 14px 24px -14px rgba(214,32,43,.9)}
.flow-item h3{font-size:16.5px;color:var(--ink);font-weight:700;margin:20px 0 8px;letter-spacing:.04em}
.flow-item p{font-size:13.5px;line-height:1.85;color:#65737F;padding-right:6px}

/* ============ 覆盖区域 ============ */
.area-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center}
.area-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  font-size:13.5px;color:#2F3E4C;background:#fff;border:1px solid var(--line);border-radius:4px;
  padding:9px 16px;transition:.25s;letter-spacing:.04em;
}
.chip:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px)}
.chip.hot{background:var(--navy-800);color:#fff;border-color:var(--navy-800)}
.chip.hot:hover{background:var(--red);border-color:var(--red);color:#fff}
.area-note{display:flex;gap:16px;margin-top:30px;padding:18px 20px;background:#fff;border-left:3px solid var(--red);box-shadow:var(--shadow-sm)}
.area-note svg{width:20px;height:20px;flex:none;stroke:var(--red);fill:none;stroke-width:2;margin-top:3px}
.area-note p{font-size:13.5px;line-height:1.85;color:#5A6875;margin:0}
.area-cards{display:grid;gap:14px}
.area-card{
  display:flex;gap:18px;padding:24px 26px;background:#fff;border:1px solid var(--line);border-radius:6px;
  transition:.3s;
}
.area-card:hover{box-shadow:var(--shadow-md);transform:translateX(4px);border-color:#D2DDE8}
.area-card b{font-size:26px;font-weight:800;color:#DCE4EC;line-height:1;letter-spacing:-.02em;min-width:44px}
.area-card h4{font-size:15.5px;color:var(--ink);margin-bottom:6px;letter-spacing:.04em}
.area-card p{font-size:13px;line-height:1.8;color:#6B7883;margin:0}

/* ============ CTA 条 ============ */
.cta-band{position:relative;background:var(--red);color:#fff;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 260px at 82% 120%,rgba(0,0,0,.28),transparent 70%);
}
.cta-band .wrap{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;padding-top:46px;padding-bottom:46px}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;letter-spacing:.03em;margin-bottom:8px}
.cta-band p{font-size:14px;color:rgba(255,255,255,.85)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--red)}
.btn-white:hover{background:#fff;transform:translateY(-1px);box-shadow:0 14px 26px -14px rgba(0,0,0,.5)}

/* ============ 联系我们 ============ */
.contact-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.contact-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:30px 26px 28px;transition:transform .35s cubic-bezier(.22,1,.36,1),box-shadow .35s,border-color .35s;
  overflow:hidden;
}
.contact-card::after{
  content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--red);
  transform:scaleX(0);transform-origin:left;transition:transform .4s cubic-bezier(.22,1,.36,1);
}
.contact-card:hover{transform:translateY(-6px);box-shadow:0 26px 40px -28px rgba(10,28,46,.45);border-color:#D8E1EA}
.contact-card:hover::after{transform:scaleX(1)}
.contact-ico{
  width:46px;height:46px;border-radius:8px;background:#FDF0F1;display:grid;place-items:center;
  margin-bottom:20px;transition:background .3s;
}
.contact-card:hover .contact-ico{background:var(--red)}
.contact-ico svg{width:21px;height:21px;stroke:var(--red);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:stroke .3s}
.contact-card:hover .contact-ico svg{stroke:#fff}
.contact-card dt{font-size:11.5px;color:var(--muted);letter-spacing:.16em;margin-bottom:9px}
.contact-card .val{display:block;font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;overflow-wrap:anywhere;letter-spacing:.01em;text-wrap:balance}
.contact-card .val-sm{font-size:15px}
.contact-card .sub{display:block;font-size:12.5px;color:var(--muted);line-height:1.7;margin-top:8px;font-weight:400}
a.contact-card{color:inherit}
a.contact-card:hover .val{color:var(--red)}

.promise{
  margin-top:22px;background:var(--navy-900);border-radius:var(--r);padding:28px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.promise::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(520px 220px at 92% 130%,rgba(214,32,43,.3),transparent 70%);
}
.promise h3{
  position:relative;z-index:2;color:#fff;font-size:16.5px;font-weight:700;letter-spacing:.06em;
  display:flex;align-items:center;gap:12px;
}
.promise h3::before{content:"";width:3px;height:18px;background:var(--red);border-radius:2px}
.promise ul{position:relative;z-index:2;list-style:none;display:flex;gap:38px;flex-wrap:wrap}
.promise li{display:flex;align-items:center;gap:9px;font-size:13.5px;color:rgba(255,255,255,.78)}
.promise svg{width:16px;height:16px;flex:none;stroke:#4ADE80;fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}

/* ============ 页脚 ============ */
.footer{background:var(--navy-900);color:rgba(255,255,255,.6);padding:64px 0 0;font-size:13.5px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:44px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer .brand-cn{color:#fff}
.footer .brand-en{color:rgba(255,255,255,.4)}
.footer-desc{margin-top:20px;line-height:1.95;color:rgba(255,255,255,.5);max-width:300px;font-size:13px}
.footer h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.1em;margin-bottom:20px}
.footer ul{list-style:none;display:grid;gap:11px}
.footer ul a{color:rgba(255,255,255,.55);transition:.2s}
.footer ul a:hover{color:#fff}
.footer-contact li{display:flex;gap:10px;line-height:1.7;color:rgba(255,255,255,.55);overflow-wrap:anywhere}
.footer-contact svg{width:15px;height:15px;flex:none;margin-top:5px;stroke:var(--red)}
.footer-contact b{color:#fff;font-weight:700;font-size:15px;letter-spacing:.03em}
.footer-bottom{padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12.5px;color:rgba(255,255,255,.35);flex-wrap:wrap}
.footer-bottom a:hover{color:#fff}

/* 回到顶部 */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:80;width:46px;height:46px;border-radius:50%;
  background:var(--navy-800);color:#fff;display:grid;place-items:center;cursor:pointer;border:0;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s;
  box-shadow:0 12px 26px -12px rgba(0,0,0,.6);
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red)}
.to-top svg{width:18px;height:18px;stroke:#fff;stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round}

/* 滚动动效 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .nav a{padding:10px 10px;font-size:14px}
  .brand-en{display:none}
  .biz-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid,.area-grid{gap:40px}
  .contact-cards{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:900px){
  .topbar-right{display:none}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .nav{
    position:fixed;inset:114px 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;
    padding:10px 24px 22px;gap:0;border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -24px rgba(0,0,0,.35);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.28s;margin:0;
  }
  .nav.open{transform:none;opacity:1;visibility:visible}
  .nav a{padding:15px 4px;border-bottom:1px solid var(--line);font-size:15.5px}
  .nav a::after{display:none}
  .nav a.active{color:var(--red)}
  .hero-inner{padding:80px 0 110px}
  .stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--line)}
  .stat:nth-child(3){border-left:0}
  .about-grid,.area-grid{grid-template-columns:1fr}
  .about-media{order:-1}
  .promise{flex-direction:column;align-items:flex-start;gap:20px;padding:26px 28px}
  .promise ul{gap:16px 30px}
  .flow{grid-template-columns:1fr 1fr;gap:34px 0}
  .flow-item:not(:last-child)::after{display:none}
  .cta-band .wrap{flex-direction:column;align-items:flex-start;gap:24px}
  .sec{padding:72px 0}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .topbar .wrap{height:34px;font-size:11.5px}
  .topbar-right{display:none}
  .nav-bar{height:64px}
  .nav{inset:98px 0 auto 0}
  .brand-mark{width:40px;height:40px;font-size:19px}
  .brand-cn{font-size:16.5px}
  .hero{min-height:auto}
  .hero-inner{padding:64px 0 96px}
  .hero h1{font-size:30px}
  .hero p{font-size:14.5px}
  .hero-actions .btn{flex:1;min-width:140px}
  .hero-tags{gap:14px 20px}
  .stats-wrap{margin-top:-46px}
  .stats{grid-template-columns:1fr 1fr}
  .stat{padding:22px 14px}
  .stat b{font-size:26px}
  .stat span{font-size:11.5px;margin-top:8px}
  .biz-grid{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr;gap:28px}
  .contact-cards{grid-template-columns:1fr;gap:14px}
  .contact-card{padding:24px 22px}
  .contact-ico{width:42px;height:42px;margin-bottom:16px}
  .promise{padding:24px 22px}
  .promise ul{flex-direction:column;gap:12px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .about-badge{padding:14px 18px}
  .about-badge b{font-size:24px}
  .to-top{right:14px;bottom:14px}
  .area-card{padding:20px}
}

/* ============ 内页 Banner ============ */
.page-hero{position:relative;display:flex;align-items:flex-end;min-height:320px;color:#fff;overflow:hidden;background:var(--navy-900)}
.page-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(100deg,rgba(6,18,30,.94) 0%,rgba(6,18,30,.82) 42%,rgba(6,18,30,.45) 100%);
}
.page-hero .wrap{position:relative;z-index:2;padding-top:72px;padding-bottom:44px}
.page-hero .eyebrow{color:rgba(255,255,255,.8)}
.page-hero h1{font-size:clamp(28px,3.6vw,44px);font-weight:800;letter-spacing:.03em;margin:14px 0 12px;line-height:1.24}
.page-hero p{font-size:15px;color:rgba(255,255,255,.72);max-width:620px;line-height:1.85}
.crumb{display:flex;align-items:center;gap:9px;font-size:12.5px;color:rgba(255,255,255,.45);margin-top:20px;letter-spacing:.06em}
.crumb a{transition:color .2s}
.crumb a:hover{color:#fff}
.crumb em{font-style:normal;color:#fff}

/* 页面淡入（仅透明度，避免影响 fixed 定位） */
body{animation:pageIn .5s ease both}
@keyframes pageIn{from{opacity:0}to{opacity:1}}

/* ============ 业务详情 ============ */
.svc{padding:76px 0;border-bottom:1px solid var(--line)}
.svc:last-of-type{border-bottom:0}
.svc-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.svc.rev .svc-media{order:2}
.svc-media{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-md);background:var(--navy-800)}
.svc-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .8s cubic-bezier(.22,1,.36,1)}
.svc-media:hover img{transform:scale(1.04)}
.svc-no{
  position:absolute;left:20px;top:20px;z-index:2;background:var(--red);color:#fff;
  font-size:12px;font-weight:700;letter-spacing:.12em;padding:5px 10px;border-radius:3px;
}
.svc-text h2{font-size:clamp(23px,2.5vw,31px);font-weight:800;color:var(--ink);margin:14px 0 18px;line-height:1.35;letter-spacing:.02em}
.svc-text p{font-size:14.8px;line-height:2;color:#54636F;margin-bottom:16px}
.svc-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:11px 20px;margin:24px 0 28px}
.svc-list li{position:relative;padding-left:16px;font-size:13.5px;color:#3B4A57;line-height:1.7}
.svc-list li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--red)}

/* ============ 优势卡片（浅色） ============ */
.adv-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.adv-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 28px;
  transition:transform .35s cubic-bezier(.22,1,.36,1),box-shadow .35s,border-color .35s;overflow:hidden;
}
.adv-card::after{
  content:"";position:absolute;left:0;bottom:0;height:3px;width:100%;background:var(--red);
  transform:scaleX(0);transform-origin:left;transition:transform .4s cubic-bezier(.22,1,.36,1);
}
.adv-card:hover{transform:translateY(-6px);box-shadow:0 26px 44px -30px rgba(10,28,46,.45);border-color:#D8E1EA}
.adv-card:hover::after{transform:scaleX(1)}
.adv-card .adv-ico{background:#FDF0F1;border:1px solid #F7DCDE;margin-bottom:20px}
.adv-card .adv-ico svg{stroke:var(--red)}
.adv-card h3{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:10px;letter-spacing:.03em}
.adv-card p{font-size:13.5px;line-height:1.9;color:#65737F}

/* ============ 发展历程 ============ */
.timeline{display:grid;margin-top:6px}
.tl{display:grid;grid-template-columns:118px 1fr;gap:36px;padding:26px 0;border-top:1px solid var(--line);align-items:start}
.tl:last-child{border-bottom:1px solid var(--line)}
.tl-year{font-size:25px;font-weight:800;color:var(--navy-800);line-height:1.15;letter-spacing:-.01em}
.tl-year small{display:block;font-size:11px;color:var(--muted);letter-spacing:.16em;font-weight:600;margin-top:7px}
.tl-body h4{font-size:15.5px;color:var(--ink);margin-bottom:6px;letter-spacing:.04em}
.tl-body p{font-size:13.5px;line-height:1.85;color:#65737F}

/* ============ 价值观 ============ */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.value{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 28px}
.value b{display:block;font-size:11.5px;color:var(--red);letter-spacing:.18em;margin-bottom:14px;font-weight:700}
.value h3{font-size:18px;color:var(--ink);margin-bottom:10px;letter-spacing:.04em}
.value p{font-size:13.5px;line-height:1.9;color:#65737F}

/* ============ 翻页 ============ */
.page-switch{background:#fff;border-top:1px solid var(--line)}
.page-switch .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:26px;padding-bottom:26px}
.ps-link{display:flex;flex-direction:column;gap:5px;font-size:11.5px;color:var(--muted);letter-spacing:.16em;transition:.2s;min-width:120px}
.ps-link span{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em;transition:color .2s}
.ps-link:hover span{color:var(--red)}
.ps-link.next{align-items:flex-end;text-align:right}
.ps-link.prev::before{content:"←";font-size:12px;color:var(--muted)}
.ps-link.next::after{content:"→";font-size:12px;color:var(--muted)}
.ps-blank{min-width:120px}

@media (max-width:1080px){
  .adv-cards{grid-template-columns:repeat(2,1fr)}
  .values{grid-template-columns:1fr}
}
@media (max-width:900px){
  .page-hero{min-height:260px}
  .page-hero .wrap{padding-top:48px;padding-bottom:34px}
  .svc{padding:54px 0}
  .svc-inner{grid-template-columns:1fr;gap:30px}
  .svc.rev .svc-media{order:0}
  .tl{grid-template-columns:96px 1fr;gap:22px}
  .adv-cards{grid-template-columns:1fr}
}
@media (max-width:640px){
  .svc-list{grid-template-columns:1fr}
  .values{grid-template-columns:1fr}
  .tl{grid-template-columns:1fr;gap:8px}
  .tl-year{font-size:21px}
  .page-switch .wrap{padding-top:20px;padding-bottom:20px}
  .ps-link span{font-size:14.5px}
  .contact-cards{gap:14px}
}

/* ============ 通用小工具 ============ */
.center-cta{margin-top:46px;text-align:center}
.adv-grid.cols4{grid-template-columns:repeat(4,1fr)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.mini-list{list-style:none;display:grid;gap:14px;margin-top:6px}
.mini-list li{display:flex;gap:12px;font-size:14px;color:#4B5A67;line-height:1.85}
.mini-list svg{width:17px;height:17px;flex:none;margin-top:5px;stroke:var(--red);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.info-block{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 30px}
.info-block h3{font-size:17px;color:var(--ink);margin-bottom:14px;letter-spacing:.04em}
.info-block p{font-size:14px;line-height:1.95;color:#54636F}
.info-block p+p{margin-top:10px}
@media (max-width:900px){
  .adv-grid.cols4{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr;gap:32px}
}
@media (max-width:640px){
  .adv-grid.cols4{grid-template-columns:1fr}
  .info-block{padding:24px 22px}
}

/* 翻页条（最终结构） */
.ps-link .ps-label{font-size:11.5px;color:var(--muted);letter-spacing:.16em;font-weight:400}
.ps-link b{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em;transition:color .2s}
.ps-link:hover b{color:var(--red)}
.ps-link.prev::before,.ps-link.next::after{content:none}

/* 移动端首屏裁切：少露天空、多露车队 */
@media (max-width:900px){
  .hero-bg{object-position:center 74%}
}

/* ============ 公司数据（关于页） ============ */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:34px}
.fact{border-left:2px solid var(--red);padding-left:16px}
.fact dt{font-size:11.5px;color:var(--muted);letter-spacing:.14em;margin-bottom:7px}
.fact dd{font-size:14.5px;color:var(--ink);font-weight:700;line-height:1.6}
.fact dd small{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:3px;letter-spacing:.02em}

/* ============ 资质墙 ============ */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cert-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:28px 26px;overflow:hidden;transition:transform .35s cubic-bezier(.22,1,.36,1),box-shadow .35s;
}
.cert-card::before{
  content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--red);
  transform:scaleX(0);transform-origin:left;transition:transform .4s cubic-bezier(.22,1,.36,1);
}
.cert-card:hover{transform:translateY(-5px);box-shadow:0 24px 38px -30px rgba(10,28,46,.45)}
.cert-card:hover::before{transform:scaleX(1)}
.cert-tag{display:block;font-size:11.5px;color:var(--red);letter-spacing:.14em;font-weight:700;margin-bottom:13px}
.cert-card h3{font-size:16.5px;color:var(--ink);margin-bottom:9px;letter-spacing:.02em;line-height:1.45}
.cert-card p{font-size:13px;color:#65737F;line-height:1.85}
.cert-no{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.5px;color:#4B5A67;line-height:1.75;letter-spacing:.01em}
.cert-no b{color:var(--navy-800);font-weight:700}

/* ============ 项目实录 ============ */
.records{display:grid;gap:18px}
.record{
  display:grid;grid-template-columns:150px 1fr;gap:28px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r);padding:28px 30px;transition:.3s;
}
.record:hover{border-color:#D2DDE8;box-shadow:0 24px 38px -32px rgba(10,28,46,.45)}
.rec-side{display:flex;flex-direction:column;gap:8px}
.rec-tag{font-size:11.5px;color:var(--red);letter-spacing:.12em;font-weight:700}
.rec-year{font-size:20px;font-weight:800;color:var(--navy-800);letter-spacing:-.01em}
.rec-body h3{font-size:16.5px;color:var(--ink);margin-bottom:9px;line-height:1.5;letter-spacing:.02em}
.rec-body p{font-size:13.5px;color:#54636F;line-height:1.9;margin-bottom:14px}
.rec-meta{display:flex;flex-wrap:wrap;gap:8px 28px;font-size:12.5px;color:var(--muted)}
.rec-meta b{color:#3B4A57;font-weight:600;margin-left:5px}

/* 配套能力卡片里的链接 */
.adv-card .biz-link{margin-top:16px}

@media (max-width:1080px){
  .facts{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:1fr}
}
@media (max-width:900px){
  .record{grid-template-columns:1fr;gap:14px;padding:24px}
  .rec-side{flex-direction:row;align-items:center;gap:14px}
}
@media (max-width:640px){
  .facts{grid-template-columns:1fr;gap:18px}
  .rec-meta{gap:6px 20px}
}

/* 顶栏补充说明：窄屏隐藏，避免拥挤 */
@media (max-width:900px){
  .tb-hint{display:none}
}