/* =====================================================
   诚高科技官网 — 主样式
   深色科技主题  |  #020817 底色  |  #00d4ff 主色
===================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --bg:       #020817;
  --bg2:      #070f1f;
  --bg3:      #0a1628;
  --primary:  #00d4ff;
  --primary2: #0095b8;
  --accent:   #7c3aed;
  --accent2:  #a855f7;
  --gold:     #f59e0b;
  --text:     #e2e8f0;
  --text2:    #94a3b8;
  --text3:    #64748b;
  --border:   rgba(0,212,255,.15);
  --border2:  rgba(0,212,255,.08);
  --glow:     0 0 20px rgba(0,212,255,.3);
  --glow2:    0 0 40px rgba(0,212,255,.15);
  --radius:   12px;
  --radius2:  20px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ---------- 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  line-height:1.7;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit}

/* ---------- 全局背景网格 ---------- */
body::before{
  content:'';
  position:fixed;inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.04) 1px,transparent 1px);
  background-size:60px 60px;
  pointer-events:none;z-index:0;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--primary2);border-radius:3px}

/* =====================================================
   导航栏
===================================================== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:0 2rem;height:68px;
  display:flex;align-items:center;
  transition:background var(--transition),backdrop-filter var(--transition),box-shadow var(--transition);
}
.navbar.scrolled{
  background:rgba(2,8,23,.88);
  backdrop-filter:blur(20px);
  box-shadow:0 1px 0 var(--border);
}
.nav-container{
  max-width:1280px;width:100%;margin:0 auto;
  display:flex;align-items:center;gap:2rem;
}
.nav-logo{
  display:flex;align-items:center;gap:.75rem;flex-shrink:0;
}
.logo-icon{
  width:42px;height:42px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--accent2));
  display:flex;align-items:center;justify-content:center;
  font-size:.9rem;font-weight:900;color:#000;letter-spacing:-.5px;
}
.logo-main{font-size:1.1rem;font-weight:700;color:#fff}
.logo-sub{font-size:.65rem;color:var(--text2);display:block;margin-top:-2px}

.nav-links{
  display:flex;align-items:center;gap:.25rem;margin-left:auto;
}
.nav-link{
  padding:.45rem .9rem;border-radius:8px;font-size:.9rem;color:var(--text2);
  transition:color var(--transition),background var(--transition);
}
.nav-link:hover,.nav-link.active{color:var(--primary);background:rgba(0,212,255,.08)}
.nav-link-external{color:var(--primary) !important}
.nav-link-external:hover{background:rgba(0,212,255,.15) !important}
.ext-icon{margin-left:3px;vertical-align:middle;opacity:.75}
.nav-cta{
  padding:.45rem 1.2rem;border-radius:8px;font-size:.9rem;font-weight:600;
  background:linear-gradient(135deg,var(--primary),var(--accent2));
  color:#000;margin-left:.5rem;
  transition:opacity var(--transition),transform var(--transition);
}
.nav-cta:hover{opacity:.85;transform:translateY(-1px)}

.nav-toggle{display:none;flex-direction:column;gap:5px;padding:.5rem}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text2);border-radius:2px;transition:var(--transition)}

/* =====================================================
   通用组件
===================================================== */
.section{padding:100px 2rem;position:relative;z-index:1}
.section-inner{max-width:1280px;margin:0 auto}

.section-tag{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.3rem 1rem;border-radius:999px;
  background:rgba(0,212,255,.08);border:1px solid var(--border);
  font-size:.75rem;color:var(--primary);letter-spacing:.1em;text-transform:uppercase;
  margin-bottom:1.5rem;
}
.section-tag::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--primary);animation:blink 1.5s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}

.section-title{
  font-size:clamp(1.8rem,4vw,2.8rem);
  font-weight:800;line-height:1.2;
  color:#fff;
}
.section-title span{
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.section-subtitle{
  margin-top:.75rem;font-size:1rem;color:var(--text2);max-width:560px;
}

.divider{
  width:60px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  margin:1.2rem 0;
}

/* ---- 卡片通用 ---- */
.card{
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);
  padding:2rem;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--glow2);
  border-color:var(--border);
}

/* ---- 按钮 ---- */
.btn-primary{
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.85rem 2rem;border-radius:var(--radius);font-size:1rem;font-weight:700;
  background:linear-gradient(135deg,var(--primary),var(--accent2));
  color:#000;
  transition:opacity var(--transition),transform var(--transition),box-shadow var(--transition);
}
.btn-primary:hover{opacity:.88;transform:translateY(-2px);box-shadow:var(--glow)}
.btn-outline{
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.8rem 1.8rem;border-radius:var(--radius);font-size:.95rem;font-weight:600;
  border:1px solid var(--border);color:var(--text2);
  transition:all var(--transition);
}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(0,212,255,.06)}

/* ---- Badge ---- */
.badge{
  display:inline-block;padding:.15rem .55rem;border-radius:999px;
  font-size:.7rem;font-weight:700;letter-spacing:.05em;
  background:linear-gradient(135deg,var(--primary),var(--accent2));color:#000;
}
.badge-hot{background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff}

/* ---- 渐入动画 ---- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}

/* =====================================================
   Hero 区
===================================================== */
.hero{
  min-height:100vh;padding:120px 2rem 80px;
  display:flex;align-items:center;
  position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(0,212,255,.12) 0%,transparent 70%),
             radial-gradient(ellipse 40% 40% at 80% 60%,rgba(124,58,237,.12) 0%,transparent 60%);
}
.hero-inner{
  max-width:1280px;margin:0 auto;width:100%;
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;
  position:relative;z-index:1;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.35rem 1rem;border-radius:999px;
  background:rgba(0,212,255,.08);border:1px solid var(--border);
  font-size:.75rem;color:var(--primary);letter-spacing:.08em;
  margin-bottom:1.5rem;
}
.hero-tag-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:blink 1.5s ease-in-out infinite}
.hero-title{
  font-size:clamp(2rem,5vw,3.5rem);
  font-weight:900;line-height:1.15;color:#fff;
  margin-bottom:1.5rem;
}
.hero-title .highlight{
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  display:block;
}
.hero-desc{font-size:1.1rem;color:var(--text2);max-width:500px;margin-bottom:2.5rem;line-height:1.8}
.hero-btns{display:flex;gap:1rem;flex-wrap:wrap}

/* -- Hero 统计 -- */
.hero-stats{
  display:grid;grid-template-columns:1fr 1fr;gap:1rem;
  margin-top:3rem;
}
.hero-stat{
  background:rgba(255,255,255,.03);border:1px solid var(--border2);
  border-radius:var(--radius);padding:1.2rem 1.4rem;
  transition:border-color var(--transition);
}
.hero-stat:hover{border-color:var(--border)}
.stat-value{
  font-size:2rem;font-weight:800;
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  line-height:1;
}
.stat-label{font-size:.8rem;color:var(--text2);margin-top:.3rem}

/* -- Hero 右侧球体 -- */
.hero-visual{display:flex;justify-content:center;align-items:center}
.orb-wrap{
  position:relative;width:400px;height:400px;
}
.orb{
  width:320px;height:320px;border-radius:50%;
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:radial-gradient(circle at 35% 35%,rgba(0,212,255,.25),rgba(124,58,237,.2),rgba(2,8,23,.8));
  box-shadow:0 0 60px rgba(0,212,255,.25),0 0 120px rgba(0,212,255,.08);
}
.orb-ring{
  position:absolute;top:50%;left:50%;
  border:1px solid var(--border);border-radius:50%;
  transform:translate(-50%,-50%);
  animation:orb-spin 8s linear infinite;
}
.orb-ring:nth-child(2){width:340px;height:340px;animation-duration:8s}
.orb-ring:nth-child(3){width:380px;height:380px;animation-duration:12s;animation-direction:reverse;border-color:rgba(124,58,237,.2)}
.orb-dot{
  position:absolute;top:0;left:50%;transform:translateX(-50%) translateY(-50%);
  width:8px;height:8px;border-radius:50%;background:var(--primary);
  box-shadow:0 0 8px var(--primary);
}
.orb-center-text{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  text-align:center;
}
.orb-center-text .big{font-size:2.5rem;font-weight:900;color:var(--primary);line-height:1}
.orb-center-text .small{font-size:.8rem;color:var(--text2);margin-top:.3rem}
@keyframes orb-spin{from{transform:translate(-50%,-50%) rotate(0)}to{transform:translate(-50%,-50%) rotate(360deg)}}

/* =====================================================
   算力销售
===================================================== */
.computing{background:var(--bg2)}
.computing-header{margin-bottom:3rem}
.computing-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem;
}
.compute-card{
  position:relative;
  background:linear-gradient(135deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);padding:2rem;
  overflow:hidden;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.compute-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  opacity:0;transition:opacity var(--transition);
}
.compute-card:hover{transform:translateY(-6px);box-shadow:var(--glow2);border-color:var(--border)}
.compute-card:hover::before{opacity:1}
.compute-card.featured{border-color:rgba(0,212,255,.3);box-shadow:0 0 30px rgba(0,212,255,.08)}
.compute-card.featured::before{opacity:1}

.compute-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem}
.compute-icon{font-size:2.2rem}
.compute-title{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:.5rem}
.compute-desc{font-size:.9rem;color:var(--text2);line-height:1.7}
.compute-spec{
  margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border2);
  display:flex;align-items:baseline;gap:.5rem;
}
.spec-value{font-size:2rem;font-weight:800;color:var(--primary)}
.spec-unit{font-size:.85rem;color:var(--text3)}

.cta-banner{
  margin-top:3rem;
  background:linear-gradient(135deg,rgba(0,212,255,.08),rgba(124,58,237,.08));
  border:1px solid rgba(0,212,255,.2);border-radius:var(--radius2);
  padding:2.5rem 3rem;
  display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap;
}
.cta-banner h3{font-size:1.5rem;font-weight:700;color:#fff}
.cta-banner p{color:var(--text2);margin-top:.3rem}

/* =====================================================
   业务版块
===================================================== */
.services-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;
  margin-top:3rem;
}
.service-card{
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);padding:2.5rem 2rem;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--glow2);border-color:var(--border)}
.service-icon{font-size:2.5rem;margin-bottom:1rem}
.service-en{font-size:.7rem;color:var(--text3);letter-spacing:.1em;margin-bottom:.5rem}
.service-title{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:.75rem}
.service-desc{font-size:.9rem;color:var(--text2);line-height:1.7;margin-bottom:1.5rem}
.service-tags{display:flex;flex-wrap:wrap;gap:.5rem}
.service-tag{
  padding:.2rem .65rem;border-radius:999px;font-size:.72rem;
  background:rgba(0,212,255,.08);border:1px solid var(--border);color:var(--primary);
}

/* =====================================================
   IDC 数据中心
===================================================== */
.datacenter{background:var(--bg2)}
.dc-layout{
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start;
  margin-top:3rem;
}
.dc-stats-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:1rem;
  margin-top:1.5rem;
}
.dc-stat{
  background:rgba(0,212,255,.05);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.2rem;
}
.dc-stat-value{font-size:1.6rem;font-weight:800;color:var(--primary);line-height:1}
.dc-stat-label{font-size:.8rem;color:var(--text2);margin-top:.3rem}

.dc-features{display:flex;flex-direction:column;gap:1rem}
.dc-feature{
  display:flex;align-items:flex-start;gap:1rem;
  background:rgba(255,255,255,.03);border:1px solid var(--border2);
  border-radius:var(--radius);padding:1.2rem 1.4rem;
  transition:border-color var(--transition),background var(--transition);
}
.dc-feature:hover{border-color:var(--border);background:rgba(0,212,255,.04)}
.dc-feature-icon{
  width:36px;height:36px;border-radius:9px;flex-shrink:0;
  background:rgba(0,212,255,.12);display:flex;align-items:center;justify-content:center;font-size:1.1rem;
}
.dc-feature-title{font-size:.95rem;font-weight:600;color:#fff}
.dc-feature-desc{font-size:.8rem;color:var(--text2);margin-top:.2rem}

/* =====================================================
   产品矩阵
===================================================== */
.products-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;
  margin-top:3rem;
}
.product-card{
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);
  padding:1.5rem;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.product-card:hover{transform:translateY(-5px);box-shadow:var(--glow2);border-color:var(--border)}
.product-emoji{font-size:2rem;margin-bottom:.75rem}
.product-name{font-size:.95rem;font-weight:700;color:#fff;margin-bottom:.4rem}
.product-desc{font-size:.8rem;color:var(--text2);line-height:1.6}

/* =====================================================
   资质荣誉
===================================================== */
.qual-honor{background:var(--bg2)}
.qual-honor-layout{
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;
  margin-top:3rem;
}
.qual-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.qual-card{
  background:rgba(255,255,255,.03);border:1px solid var(--border2);
  border-radius:var(--radius);padding:1.25rem;
  transition:border-color var(--transition),background var(--transition);
}
.qual-card:hover{border-color:var(--border);background:rgba(0,212,255,.04)}
.qual-check{
  display:flex;align-items:center;gap:.5rem;
  font-size:.8rem;color:var(--primary);font-weight:600;margin-bottom:.3rem;
}
.qual-check::before{content:'✓';font-weight:900}
.qual-title{font-size:.85rem;font-weight:600;color:#fff;margin-bottom:.3rem}
.qual-desc{font-size:.75rem;color:var(--text2)}

.honor-list{display:flex;flex-direction:column;gap:.75rem;margin-bottom:2rem}
.honor-item{
  display:flex;align-items:center;gap:1rem;
  background:rgba(255,255,255,.03);border:1px solid var(--border2);
  border-radius:var(--radius);padding:1rem 1.25rem;
  transition:border-color var(--transition),background var(--transition);
}
.honor-item:hover{border-color:rgba(245,158,11,.3);background:rgba(245,158,11,.04)}
.honor-star{font-size:1.3rem}
.honor-text{font-size:.9rem;color:var(--text2)}

.partners-row{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.5rem}
.partner-badge{
  display:flex;align-items:center;gap:.5rem;
  padding:.45rem 1rem;border-radius:var(--radius);
  background:rgba(255,255,255,.04);border:1px solid var(--border2);
  font-size:.8rem;color:var(--text2);
  transition:border-color var(--transition),color var(--transition);
}
.partner-badge:hover{border-color:var(--border);color:var(--text)}

/* =====================================================
   项目案例
===================================================== */
.industries-row{
  display:flex;flex-wrap:wrap;gap:.75rem;margin-bottom:3rem;
}
.industry-pill{
  display:flex;align-items:center;gap:.5rem;
  padding:.5rem 1rem;border-radius:999px;
  background:rgba(255,255,255,.04);border:1px solid var(--border2);
  font-size:.85rem;color:var(--text2);
  transition:all var(--transition);
}
.industry-pill:hover{border-color:var(--border);color:var(--primary);background:rgba(0,212,255,.06)}
.industry-pill .year{font-size:.7rem;color:var(--text3)}

.cases-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;
}
.case-card{
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);padding:1.75rem;
  position:relative;overflow:hidden;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.case-card::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent2));
  opacity:0;transition:opacity var(--transition);
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--glow2);border-color:var(--border)}
.case-card:hover::after{opacity:1}
.case-year{
  font-size:.75rem;color:var(--primary);font-weight:600;
  letter-spacing:.05em;margin-bottom:.75rem;
}
.case-name{font-size:1rem;font-weight:700;color:#fff;margin-bottom:.4rem}
.case-product{
  display:inline-block;padding:.2rem .65rem;border-radius:999px;
  font-size:.72rem;background:rgba(124,58,237,.12);border:1px solid rgba(124,58,237,.25);
  color:var(--accent2);margin-bottom:.75rem;
}
.case-desc{font-size:.85rem;color:var(--text2);line-height:1.6}

/* =====================================================
   联系我们 / 表单
===================================================== */
.contact-page{background:var(--bg2)}
.contact-layout{
  display:grid;grid-template-columns:1fr 1.4fr;gap:4rem;
  margin-top:3rem;
}
.contact-info p{color:var(--text2);margin-bottom:2rem;line-height:1.8}
.contact-item{
  display:flex;align-items:flex-start;gap:1rem;
  background:rgba(255,255,255,.03);border:1px solid var(--border2);
  border-radius:var(--radius);padding:1.2rem 1.4rem;margin-bottom:1rem;
}
.ci-icon{
  width:38px;height:38px;border-radius:9px;flex-shrink:0;
  background:rgba(0,212,255,.1);display:flex;align-items:center;justify-content:center;font-size:1.1rem;
}
.ci-label{font-size:.75rem;color:var(--text3);margin-bottom:.2rem}
.ci-value{font-size:.95rem;color:var(--text);font-weight:600}

/* ---- 表单 ---- */
.contact-form{
  background:linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.02));
  border:1px solid var(--border2);border-radius:var(--radius2);padding:2.5rem;
}
.contact-form h3{font-size:1.3rem;font-weight:700;color:#fff;margin-bottom:1.5rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1rem}
.form-group{margin-bottom:1rem}
label{display:block;font-size:.85rem;color:var(--text2);margin-bottom:.4rem}
.form-control{
  width:100%;padding:.75rem 1rem;border-radius:var(--radius);
  background:rgba(255,255,255,.04);
  border:1px solid var(--border2);
  color:var(--text);font-size:.95rem;font-family:inherit;
  transition:border-color var(--transition),box-shadow var(--transition);
  outline:none;
}
.form-control:focus{border-color:rgba(0,212,255,.4);box-shadow:0 0 0 3px rgba(0,212,255,.08)}
.form-control::placeholder{color:var(--text3)}
select.form-control{cursor:pointer}
select.form-control option{background:var(--bg3)}
textarea.form-control{resize:vertical;min-height:110px}

.form-submit{
  width:100%;padding:1rem;border-radius:var(--radius);font-size:1rem;font-weight:700;
  background:linear-gradient(135deg,var(--primary),var(--accent2));
  color:#000;
  transition:opacity var(--transition),transform var(--transition);
}
.form-submit:hover{opacity:.85;transform:translateY(-1px)}
.form-submit:disabled{opacity:.5;transform:none;cursor:not-allowed}

.form-msg{
  margin-top:1rem;padding:.75rem 1rem;border-radius:var(--radius);
  font-size:.9rem;display:none;
}
.form-msg.success{background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.25);color:var(--primary)}
.form-msg.error{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.25);color:#f87171}

/* =====================================================
   页脚
===================================================== */
.footer{
  background:var(--bg3);border-top:1px solid var(--border2);
  padding:5rem 2rem 2rem;position:relative;z-index:1;
}
.footer-grid{
  max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:2fr 1fr 1fr 2fr;gap:3rem;
  margin-bottom:3rem;
}
.footer-logo{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}
.footer-name{font-size:1.1rem;font-weight:700;color:#fff}
.footer-stock{font-size:.7rem;color:var(--text3)}
.footer-slogan{font-size:.95rem;color:var(--primary);font-weight:600;margin-bottom:.75rem}
.footer-desc{font-size:.85rem;color:var(--text2);line-height:1.7}

.footer-col h4{font-size:.9rem;font-weight:700;color:#fff;margin-bottom:1rem}
.footer-col ul{display:flex;flex-direction:column;gap:.6rem}
.footer-col a{font-size:.85rem;color:var(--text2);transition:color var(--transition)}
.footer-col a:hover{color:var(--primary)}

.footer-contact p{
  display:flex;align-items:flex-start;gap:.5rem;
  font-size:.85rem;color:var(--text2);margin-bottom:.75rem;
}
.footer-contact .icon{flex-shrink:0}

.footer-bottom{
  max-width:1280px;margin:0 auto;
  padding-top:2rem;border-top:1px solid var(--border2);
  text-align:center;font-size:.8rem;color:var(--text3);
}
.footer-visit{
  margin-top:1rem;
  display:flex;flex-direction:column;gap:.5rem;
  font-size:.78rem;color:var(--text3);
}
.visit-count{letter-spacing:.02em}
.visit-recent{
  font-size:.72rem;color:var(--text3);
  opacity:.85;word-break:break-all;
  line-height:1.6;
}

/* =====================================================
   404 页面
===================================================== */
.page-404{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:2rem;
}
.page-404 h1{font-size:8rem;font-weight:900;color:var(--primary);line-height:1;opacity:.4}
.page-404 h2{font-size:2rem;font-weight:700;color:#fff;margin-bottom:1rem}
.page-404 p{color:var(--text2);margin-bottom:2rem}

/* =====================================================
   消息提示条
===================================================== */
.flash-msg{
  position:fixed;top:80px;right:2rem;z-index:9999;
  padding:.85rem 1.5rem;border-radius:var(--radius);
  font-size:.9rem;font-weight:600;
  box-shadow:0 8px 32px rgba(0,0,0,.4);
  animation:slideIn .35s ease;
}
.flash-msg.success{background:rgba(0,212,255,.12);border:1px solid rgba(0,212,255,.4);color:var(--primary)}
.flash-msg.error{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.4);color:#f87171}
@keyframes slideIn{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:none}}

/* =====================================================
   响应式
===================================================== */
@media(max-width:1100px){
  .products-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:2rem}
}
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{display:none}
  .dc-layout,.qual-honor-layout,.contact-layout{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr 1fr}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .computing-grid{grid-template-columns:1fr}
  .qual-honor-layout .qual-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .section{padding:60px 1.25rem}
  .hero{padding:100px 1.25rem 60px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .cases-grid,.products-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{
    position:fixed;top:68px;left:0;right:0;
    background:rgba(2,8,23,.97);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border2);
    flex-direction:column;align-items:stretch;padding:1rem;gap:.25rem;
    transform:translateY(-120%);opacity:0;transition:transform var(--transition),opacity var(--transition);
    pointer-events:none;
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:all}
  .nav-link,.nav-cta{padding:.7rem 1rem;border-radius:var(--radius);margin:0;text-align:left}
  .nav-toggle{display:flex}
  .cta-banner{flex-direction:column;gap:1.5rem}
}