/* ============================================================
   Robotebuy 品牌企业站 — 深藏青主题
   robotebuy.com.cn  |  Powered by tuize.com
   ============================================================ */

:root{
  --dk-1:#0f2027;   /* 最深 */
  --dk-2:#203a43;
  --dk-3:#2c5364;   /* 渐变中间蓝 */
  --dk-cyan:#4fc3f7;/* 强调青 */
  --dk-orange:#ff7043;/* 强调橙 */
  --ink:#1f2937;    /* 正文深灰 */
  --mut:#6b7280;    /* 次要灰 */
  --bg:#f7f9fa;     /* 页面浅底 */
  --line:#e5e7eb;
  --white:#ffffff;
  --shadow:0 6px 20px rgba(15,32,39,.10);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:15px;
}
a{color:var(--dk-3);text-decoration:none;}
a:hover{color:var(--dk-1);}
.container{max-width:1080px;margin:0 auto;padding:0 24px;}
.en{display:block;}

/* ---------- 顶部导航 ---------- */
.topbar{
  background:linear-gradient(135deg,var(--dk-1),var(--dk-2),var(--dk-3));
  color:#fff;
  padding:14px 0;
  position:sticky;top:0;z-index:50;
  box-shadow:0 2px 12px rgba(15,32,39,.25);
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;letter-spacing:.3px;}
.brand .logo{
  width:34px;height:34px;border-radius:8px;
  background:linear-gradient(135deg,var(--dk-cyan),#0288d1);
  display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;
}
.brand small{display:block;font-size:.7rem;font-weight:400;color:rgba(255,255,255,.7);letter-spacing:.5px;}
.nav{display:flex;gap:22px;align-items:center;}
.nav a{color:rgba(255,255,255,.88);font-weight:600;font-size:.92rem;transition:color .18s;}
.nav a:hover{color:var(--dk-cyan);}
.nav .cta{
  background:var(--dk-orange);color:#fff;padding:8px 18px;border-radius:24px;font-weight:700;
  transition:filter .18s;
}
.nav .cta:hover{filter:brightness(1.08);color:#fff;}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--dk-1) 0%,var(--dk-2) 55%,var(--dk-3) 100%);
  color:#fff;
  padding:84px 0 74px;
  position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,195,247,.22),transparent 70%);
}
.hero::before{
  content:"";position:absolute;left:-100px;bottom:-140px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,112,67,.16),transparent 70%);
}
.hero .container{position:relative;z-index:2;}
.hero .sub{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);
  color:var(--dk-cyan);font-size:.78rem;font-weight:700;letter-spacing:.6px;padding:6px 16px;border-radius:20px;margin-bottom:22px;text-transform:uppercase;}
.hero h1{font-size:2.6rem;line-height:1.2;font-weight:800;margin-bottom:16px;}
.hero h1 em{font-style:normal;color:var(--dk-cyan);}
.hero p.lead{font-size:1.12rem;color:rgba(255,255,255,.82);max-width:640px;margin-bottom:8px;}
.hero p.lead-zh{font-size:.95rem;color:rgba(255,255,255,.6);margin-bottom:26px;}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:13px 28px;border-radius:28px;font-weight:700;font-size:.95rem;transition:transform .15s,box-shadow .15s,filter .15s;}
.btn:hover{transform:translateY(-2px);}
.btn-orange{background:var(--dk-orange);color:#fff;box-shadow:0 8px 22px rgba(255,112,67,.35);}
.btn-orange:hover{filter:brightness(1.07);color:#fff;}
.btn-ghost{border:2px solid rgba(255,255,255,.5);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;}

/* ---------- 通用区块 ---------- */
.section{padding:64px 0;}
.section .kicker{color:var(--dk-3);font-weight:800;letter-spacing:1.5px;font-size:.8rem;text-transform:uppercase;margin-bottom:8px;}
.section h2{font-size:1.9rem;font-weight:800;color:var(--dk-1);margin-bottom:8px;}
.section .sub-zh{color:var(--mut);margin-bottom:36px;font-size:.95rem;}
h2 .en,h3 .en{color:var(--dk-3);}

/* 三/六卡片网格 */
.grid{display:grid;gap:22px;}
.g3{grid-template-columns:repeat(3,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:14px;padding:26px;
  box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(15,32,39,.14);}
.card .ic{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,#e3f2fd,#bbdefb);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;}
.card h3{font-size:1.08rem;font-weight:800;color:var(--dk-1);margin-bottom:8px;}
.card p{color:var(--mut);font-size:.9rem;}
.card .en-sub{color:var(--dk-3);font-weight:700;font-size:.8rem;text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px;}

/* 产品品类 chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;}
.chip{background:var(--white);border:1px solid var(--line);border-radius:22px;padding:10px 22px;
  font-weight:700;color:var(--dk-1);font-size:.9rem;box-shadow:var(--shadow);}
.chip span{color:var(--dk-cyan);}
.chip small{display:block;color:var(--mut);font-weight:400;font-size:.74rem;letter-spacing:.3px;}

/* ---------- 价值横幅 ---------- */
.trust{background:linear-gradient(135deg,var(--dk-2),var(--dk-3));color:#fff;padding:60px 0;}
.trust .grid .card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);color:#fff;box-shadow:none;}
.trust .card h3{color:#fff;}
.trust .card p{color:rgba(255,255,255,.72);}
.trust .card .en-sub{color:var(--dk-cyan);}

/* ---------- CTA ---------- */
.cta-band{background:var(--dk-1);color:#fff;text-align:center;padding:56px 24px;}
.cta-band h2{color:#fff;font-size:1.7rem;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.7);margin-bottom:26px;}
.cta-band .btn-orange{font-size:1rem;}

/* ---------- 页脚 ---------- */
.footer{background:var(--dk-1);color:rgba(255,255,255,.7);padding:40px 0 28px;font-size:.86rem;}
.footer .grid{grid-template-columns:2fr 1fr 1fr;gap:30px;}
.footer h4{color:#fff;font-weight:700;margin-bottom:14px;font-size:1rem;}
.footer a{color:rgba(255,255,255,.72);display:block;margin-bottom:8px;}
.footer a:hover{color:var(--dk-cyan);}
.footer .brand{color:#fff;margin-bottom:10px;}
.footer .bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;text-align:center;color:rgba(255,255,255,.5);}
.footer .bottom .sep{opacity:.4;}
.footer .brand small{color:rgba(255,255,255,.6);}

/* ---------- 内页 (About/Contact) ---------- */
.page-hero{background:linear-gradient(135deg,var(--dk-1),var(--dk-2));color:#fff;padding:56px 0;}
.page-hero h1{font-size:2rem;font-weight:800;}
.page-hero p{color:rgba(255,255,255,.75);margin-top:6px;max-width:640px;}
.page-hero .en-sub{color:var(--dk-cyan);font-size:.8rem;text-transform:uppercase;letter-spacing:1px;margin-bottom:8px;}

/* About 流程条 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:10px;}
.step{text-align:center;padding:20px 10px;background:var(--white);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);}
.step .n{width:34px;height:34px;margin:0 auto 10px;border-radius:50%;background:linear-gradient(135deg,var(--dk-cyan),#0288d1);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;}
.step b{display:block;font-size:.9rem;color:var(--dk-1);margin-bottom:4px;}
.step small{color:var(--mut);font-size:.76rem;line-height:1.4;display:block;}

/* Contact 卡片 */
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:var(--shadow);}
.contact-card h3{font-size:1.1rem;font-weight:800;color:var(--dk-1);margin-bottom:6px;}
.contact-card .role{color:var(--dk-3);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px;margin-bottom:14px;}
.contact-card ul{list-style:none;}
.contact-card li{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line);font-size:.92rem;}
.contact-card li:last-child{border-bottom:none;}
.contact-card li .k{font-weight:700;color:var(--dk-1);min-width:84px;}
.contact-card li .v{color:var(--mut);word-break:break-word;}

/* ---------- 响应式 ---------- */
@media(max-width:860px){
  .g3{grid-template-columns:repeat(2,1fr);}
  .g2,.footer .grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .hero h1{font-size:1.9rem;}
  .nav{gap:14px;}
}
@media(max-width:560px){
  .g3{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .nav .cta{display:none;}
}
@media print{
  .topbar,.hero .actions,.cta-band,.cta{display:none;}
}