/* ============================================================
   鼎新图强 · GEO 官网  全站样式
   设计风格：AI 明亮科技风（浅色基调 + 青/蓝/紫渐变点缀）
   纯静态 HTML + CSS，少量纯 CSS 动效，不依赖 JS 渲染内容
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root{
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --indigo:#4f46e5;
  --violet:#8b5cf6;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e6ebf3;
  --bg:#ffffff;
  --bg-soft:#f6f9ff;
  --bg-soft-2:#eef3fc;
  --grad:linear-gradient(120deg,var(--cyan),var(--blue) 48%,var(--violet));
  --grad-soft:linear-gradient(120deg,#e8fbff,#eef3ff 50%,#f3edff);
  --shadow-sm:0 2px 10px rgba(30,64,175,.06);
  --shadow:0 12px 40px rgba(30,64,175,.10);
  --shadow-lg:0 24px 70px rgba(30,64,175,.16);
  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --ease:cubic-bezier(.23,1,.32,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink-2);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
ul{list-style:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:800;letter-spacing:-.01em}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:19px}
.brand img{width:34px;height:34px}
.brand .en{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.12em;display:block;line-height:1}
.brand .cn{line-height:1.2}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:9px 16px;border-radius:10px;color:var(--ink-2);font-weight:600;font-size:15px;
  transition:all .2s var(--ease);
}
.nav-links a:hover{color:var(--blue);background:var(--bg-soft)}
.nav-links a.active{color:var(--blue)}
.nav-cta{
  margin-left:8px;background:var(--grad);color:#fff!important;padding:10px 22px!important;
  border-radius:999px;box-shadow:0 6px 18px rgba(59,130,246,.35);
}
.nav-cta:hover{transform:translateY(-1px);background:var(--grad)!important}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* 纯 CSS 移动端菜单（checkbox hack，不依赖 JS） */
#nav-check{display:none}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--blue);text-transform:uppercase;margin-bottom:14px;
}
.section-head{max-width:760px;margin:0 auto 56px;text-align:center}
.section-head h2{font-size:clamp(28px,4vw,42px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:17px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:16px;
  padding:14px 30px;border-radius:999px;cursor:pointer;border:0;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px rgba(59,130,246,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(59,130,246,.45)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--grad-soft);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(900px 500px at 85% 20%,rgba(139,92,246,.16),transparent 60%),
             radial-gradient(700px 500px at 10% 90%,rgba(34,211,238,.16),transparent 60%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:88px 0 96px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:700;color:var(--indigo);
  box-shadow:var(--shadow-sm);margin-bottom:24px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--grad)}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.15;margin-bottom:22px}
.hero p.lead{font-size:19px;color:var(--ink-2);max-width:540px;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:44px;flex-wrap:wrap}
.hero-stats .num{font-size:30px;font-weight:800;color:var(--ink)}
.hero-stats .lab{font-size:13px;color:var(--muted)}
.hero-visual{position:relative}
.hero-visual img{width:100%;border-radius:24px;filter:drop-shadow(0 30px 60px rgba(59,130,246,.18))}

/* ---------- 信任条 / 平台 logo ---------- */
.platform-strip{padding:40px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.platform-strip p{text-align:center;color:var(--muted);font-size:14px;margin-bottom:22px;font-weight:600}
.logo-row{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px 40px}
.logo-row .lg{display:flex;align-items:center;gap:8px;color:var(--ink-2);font-weight:700;font-size:15px;opacity:.85;transition:.25s}
.logo-row .lg:hover{opacity:1;transform:translateY(-2px)}
.logo-row .lg img{width:26px;height:26px}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;
  box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
  height:100%;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ico{
  width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);margin-bottom:18px;color:var(--blue);
}
.card .ico svg{width:28px;height:28px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* 价值卡渐变顶条 */
.card.value{position:relative;overflow:hidden}
.card.value::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.card.value:hover::before{transform:scaleX(1)}

/* ---------- 平台覆盖（重点板块） ---------- */
.platforms{background:var(--bg-soft)}
.plat-group{margin-bottom:40px}
.plat-group:last-child{margin-bottom:0}
.plat-group-title{display:flex;align-items:center;gap:12px;margin-bottom:24px;font-size:17px;font-weight:800;color:var(--ink)}
.plat-group-title .tag{font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;color:#fff;background:var(--grad)}
.plat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:18px}
.plat-item{
  display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;box-shadow:var(--shadow-sm);transition:.25s var(--ease);
}
.plat-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.plat-item .plat-logo{width:42px;height:42px;flex:0 0 42px;border-radius:11px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center}
.plat-item .plat-logo img{width:26px;height:26px}
.plat-item .plat-name{font-weight:700;color:var(--ink);font-size:16px;line-height:1.2}
.plat-item .plat-sub{font-size:12px;color:var(--muted)}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;box-shadow:var(--shadow-sm)}
.step .n{
  width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;font-weight:800;font-size:20px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 8px 20px rgba(59,130,246,.3);
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- 特性 / 为什么选我们 ---------- */
.feature-row{display:flex;gap:16px;align-items:flex-start;padding:22px 0;border-bottom:1px solid var(--line)}
.feature-row:last-child{border-bottom:0}
.feature-row .fi{flex:0 0 48px;width:48px;height:48px;border-radius:12px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;color:var(--blue)}
.feature-row h3{font-size:18px;margin-bottom:6px}
.feature-row p{color:var(--muted);font-size:15px}

/* ---------- 对比表 ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--line)}
table.cmp{width:100%;border-collapse:collapse;background:#fff;min-width:640px}
table.cmp th,table.cmp td{padding:18px 22px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
table.cmp thead th{background:var(--bg-soft);font-weight:800;color:var(--ink);font-size:15px}
table.cmp thead th:last-child{color:var(--blue)}
table.cmp td:first-child{font-weight:700;color:var(--ink-2)}
table.cmp tbody tr:last-child td{border-bottom:0}
table.cmp td.hl{color:var(--ink);font-weight:600;background:linear-gradient(90deg,rgba(59,130,246,.05),rgba(139,92,246,.05))}

/* ---------- 数据指标 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 18px;box-shadow:var(--shadow-sm)}
.metric .v{font-size:40px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.metric .l{color:var(--muted);font-size:14px;margin-top:6px}

/* ---------- 案例卡 ---------- */
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.3s var(--ease)}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case-card .ctop{padding:26px 28px 0}
.case-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--indigo);background:var(--bg-soft-2);padding:5px 14px;border-radius:999px;margin-bottom:14px}
.case-card h3{font-size:20px;margin-bottom:10px}
.case-card .desc{color:var(--muted);font-size:14px;padding:0 28px 4px}
.case-stats{display:flex;gap:10px;padding:20px 28px 28px;flex-wrap:wrap}
.case-stat{flex:1;min-width:90px;background:var(--bg-soft);border-radius:12px;padding:14px 10px;text-align:center}
.case-stat .cv{font-size:24px;font-weight:800;color:var(--blue)}
.case-stat .cl{font-size:12px;color:var(--muted);margin-top:2px}

/* ---------- CTA ---------- */
.cta{position:relative;border-radius:28px;overflow:hidden;padding:64px 48px;text-align:center;color:#fff;background:var(--grad)}
.cta::before{content:"";position:absolute;inset:0;background:url('https://d2xsxph8kpxj0f.cloudfront.net/310519663457959005/b7WcigRBZbmhS3GZFsYszm/cta_bg-SZDimLav7H5SEG2a5oiLRt.webp') center/cover;opacity:.25;mix-blend-mode:soft-light}
.cta>*{position:relative}
.cta h2{color:#fff;font-size:clamp(26px,3.6vw,38px);margin-bottom:14px}
.cta p{color:rgba(255,255,255,.9);font-size:17px;max-width:560px;margin:0 auto 30px}
.cta .btn-primary{background:#fff;color:var(--indigo);box-shadow:0 12px 36px rgba(0,0,0,.18)}
.cta .btn-primary:hover{transform:translateY(-2px)}

/* 招商加盟条 */
.partner-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:#fff;border:1px solid var(--line);border-left:5px solid var(--blue);
  border-radius:var(--radius);padding:30px 36px;box-shadow:var(--shadow-sm);
}
.partner-bar h3{font-size:22px;margin-bottom:6px}
.partner-bar p{color:var(--muted)}

/* ---------- 关于页 ---------- */
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-split img{width:100%;border-radius:24px;box-shadow:var(--shadow)}
.mvv{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mvv .card h3{font-size:20px}

/* ---------- 联系页 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.qr-only{max-width:440px;margin:0 auto}
.qr-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px;text-align:center;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center}
.qr-card img{width:220px;height:220px;border-radius:16px;margin-bottom:20px}
.qr-card h3{font-size:22px;margin-bottom:8px}
.qr-card p{color:var(--muted)}
.contact-info{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.contact-info h3{font-size:22px;margin-bottom:24px}
.ci-item{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.ci-item:last-child{border-bottom:0}
.ci-item .ci-ico{flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--blue);box-shadow:var(--shadow-sm)}
.ci-item .ci-l{font-size:13px;color:var(--muted)}
.ci-item .ci-v{font-size:17px;font-weight:700;color:var(--ink)}

/* ---------- 页脚 ---------- */
.footer{background:#0d1426;color:#94a3b8;padding:64px 0 32px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer .brand{color:#fff;margin-bottom:16px}
.footer .brand .en{color:#64748b}
.footer-desc{font-size:14px;color:#94a3b8;max-width:300px}
.footer h4{color:#fff;font-size:15px;margin-bottom:18px}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:14px;color:#94a3b8;transition:.2s}
.footer ul li a:hover{color:#fff}
.footer-bottom{padding-top:28px;text-align:center;font-size:13px;color:#64748b}
.footer-bottom a{color:#94a3b8}

/* ---------- 入场动画（纯 CSS，尊重 reduced-motion） ---------- */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(24px);animation:rise .7s var(--ease) forwards}
  .reveal.d1{animation-delay:.08s}
  .reveal.d2{animation-delay:.16s}
  .reveal.d3{animation-delay:.24s}
  .reveal.d4{animation-delay:.32s}
  @keyframes rise{to{opacity:1;transform:none}}
  .float{animation:float 6s ease-in-out infinite}
  @keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
}

/* ---------- 内页头部 banner ---------- */
.page-hero{position:relative;background:var(--grad-soft);padding:72px 0;overflow:hidden;text-align:center}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 80% 10%,rgba(139,92,246,.14),transparent 60%),radial-gradient(600px 400px at 10% 90%,rgba(34,211,238,.14),transparent 60%)}
.page-hero .container{position:relative}
.page-hero h1{font-size:clamp(30px,4.5vw,46px);margin-bottom:14px}
.page-hero p{color:var(--ink-2);font-size:18px;max-width:680px;margin:0 auto}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a:hover{color:var(--blue)}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .about-split{grid-template-columns:1fr;gap:32px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .contact-wrap{grid-template-columns:1fr}
  .mvv{grid-template-columns:1fr}
}
@media (max-width:680px){
  .section{padding:64px 0}
  .nav-links{
    position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 16px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-130%);transition:transform .3s var(--ease);
  }
  #nav-check:checked ~ .nav-links{transform:translateY(0)}
  .nav-links a{padding:14px 12px;border-radius:10px}
  .nav-cta{margin:8px 0 0;text-align:center;justify-content:center}
  .nav-toggle{display:flex}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .plat-grid{grid-template-columns:1fr 1fr}
  .partner-bar{flex-direction:column;align-items:flex-start;text-align:left}
  .footer-top{grid-template-columns:1fr}
  .cta{padding:48px 24px}
  .hero-stats{gap:24px}
}
@media (max-width:380px){
  .plat-grid{grid-template-columns:1fr}
}