:root{
  --primary:#1E88F5;
  --primary-dark:#1565C0;
  --deep:#1B3B6F;
  --deep2:#0F2A52;
  --bg:#F5F8FC;
  --bg2:#EEF3FA;
  --text:#1F2937;
  --text2:#4B5563;
  --muted:#6B7280;
  --line:#E5EAF2;
  --white:#fff;
  --shadow:0 6px 24px rgba(30,136,245,.08);
  --shadow-lg:0 12px 40px rgba(27,59,111,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
/* ===== 顶部导航 ===== */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--deep)}
.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center}
.nav-menu{display:flex;gap:34px;list-style:none;align-items:center}
.nav-menu > li{position:relative;padding:24px 0}
.nav-menu a{font-size:15px;color:var(--text2);position:relative;transition:.2s;display:inline-flex;align-items:center;gap:4px}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary)}
.nav-menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-24px;height:3px;background:var(--primary);border-radius:2px}
.nav-menu .caret{width:10px;height:10px;transition:.25s;stroke:currentColor;fill:none;stroke-width:2}
.nav-menu > li:hover .caret{transform:rotate(180deg);stroke:var(--primary)}
.has-dropdown{cursor:pointer}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:320px;background:#fff;border-radius:14px;box-shadow:0 20px 50px rgba(27,59,111,.18);border:1px solid var(--line);padding:12px;opacity:0;visibility:hidden;transition:.25s;z-index:200}
.has-dropdown:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown::before{content:"";position:absolute;top:-6px;left:50%;transform:translateX(-50%) rotate(45deg);width:12px;height:12px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line)}
.dropdown-item{display:flex;align-items:flex-start;gap:12px;padding:14px 14px;border-radius:10px;transition:.2s;text-decoration:none}
.dropdown-item:hover{background:var(--bg)}
.dropdown-item:hover .di-title{color:var(--primary)}
.di-icon{width:40px;height:40px;flex-shrink:0;border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.di-icon svg{width:22px;height:22px}
.di-text{flex:1}
.di-title{font-size:14px;color:var(--deep);font-weight:600;margin-bottom:2px;transition:.2s}
.di-desc{font-size:12px;color:var(--muted);line-height:1.5}
.nav-right{display:flex;align-items:center;gap:20px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:24px;font-size:14px;font-weight:500;transition:.25s;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(30,136,245,.35)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-tel{display:flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px}
/* ===== Hero Banner ===== */
.about-banner{position:relative;height:560px;overflow:hidden;background:linear-gradient(135deg,#0F2A52,#1E88F5) center/cover no-repeat}
.about-banner .banner-bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.about-banner .banner-bg-mask{position:absolute;inset:0;background:transparent;z-index:1}
.about-banner .banner-cloud{z-index:2}
.about-banner::before{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 25% 30%,rgba(126,208,255,.35),transparent 55%),
  radial-gradient(circle at 75% 60%,rgba(30,136,245,.25),transparent 55%)}
.about-banner::after{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:60px 60px}
.banner-cloud{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:1;text-align:center;color:#fff}
.banner-cloud svg{width:200px;height:200px;margin:0 auto;filter:drop-shadow(0 8px 20px rgba(0,0,0,.3))}
.banner-cloud .brand{font-size:48px;font-weight:800;letter-spacing:4px;margin-top:-30px;text-shadow:0 4px 20px rgba(0,0,0,.3)}
.banner-cloud .brand-en{font-size:13px;letter-spacing:6px;color:rgba(255,255,255,.75);margin-top:8px}
/* ===== 面包屑 ===== */
.crumb{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;font-size:13px;color:var(--muted)}
.crumb .container{display:flex;align-items:center;gap:8px}
.crumb svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2}
.crumb a{color:var(--muted);transition:.2s}
.crumb a:hover{color:var(--primary)}
.crumb .sep{opacity:.5}
.crumb .cur{color:var(--primary);font-weight:500}
/* ===== 引言标题 ===== */
.intro-head{text-align:center;padding:70px 0 20px}
.intro-head h2{font-size:36px;color:var(--deep);font-weight:700;margin-bottom:10px;letter-spacing:-.3px}
.intro-head p{color:var(--muted);font-size:15px;max-width:640px;margin:0 auto}
.intro-head .divider{width:60px;height:4px;background:linear-gradient(90deg,#1E88F5,#7ED0FF);border-radius:2px;margin:20px auto 0}
/* ===== 视频 + 文字介绍 ===== */
.intro-sec{padding:40px 0 90px}
.intro-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.intro-text{color:var(--text2);font-size:15px;line-height:1.9}
.intro-text p{margin-bottom:20px}
.intro-text .highlight{color:var(--primary);font-weight:600}
/* ===== 公司信息卡 ===== */
.info-sec{background:linear-gradient(180deg,#F5F8FC,#EEF3FA);padding:80px 0}
.info-title{text-align:center;margin-bottom:44px}
.info-title h2{font-size:28px;color:var(--deep);font-weight:700;letter-spacing:.5px}
.info-title h2 .en{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:8px;letter-spacing:2px}
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.info-card{background:#fff;border-radius:20px;padding:40px 44px;box-shadow:0 6px 20px rgba(27,59,111,.06)}
.info-card h3{font-size:20px;color:var(--deep);font-weight:700;margin-bottom:6px}
.info-card .en{font-size:12px;color:var(--muted);letter-spacing:1.5px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px dashed var(--line)}
.info-list{list-style:none}
.info-list li{display:flex;align-items:flex-start;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line)}
.info-list li:last-child{border-bottom:none}
.info-icon{width:40px;height:40px;background:linear-gradient(135deg,#E8F2FF,#D1E5FF);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.info-icon svg{width:20px;height:20px;stroke:var(--primary);fill:none;stroke-width:2}
.info-text{flex:1;min-width:0}
.info-text .lbl{font-size:12px;color:var(--muted);margin-bottom:3px}
.info-text .val{font-size:15px;color:var(--deep);font-weight:600;word-break:break-all}
.info-text .val a{color:var(--deep);transition:.2s}
.info-text .val a:hover{color:var(--primary)}
/* 地图卡 */
.map-card{background:#fff;border-radius:20px;overflow:hidden;box-shadow:0 6px 20px rgba(27,59,111,.06);position:relative}
.map-wrap{position:relative;aspect-ratio:769/1024;background:linear-gradient(135deg,#EEF5FF,#D6E7F7);overflow:hidden}
/* 二维码区 */
.qr-follow{display:flex;gap:24px;margin-top:24px;padding-top:24px;border-top:1px dashed var(--line)}
.qr-follow-item{text-align:center;flex:1}
.qr-follow-img{width:160px;height:160px;margin:0 auto 12px;background:#fff;padding:10px;border:1px solid var(--line);border-radius:12px;position:relative}
.qr-follow-img svg{width:100%;height:100%}
.qr-follow-item .lbl{font-size:12px;color:var(--muted)}
/* ===== Footer（全站统一） ===== */
footer{background:#262834;color:rgba(255,255,255,.75);padding:60px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;margin-bottom:40px}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand p{font-size:13px;color:rgba(255,255,255,.55);line-height:1.7;margin-bottom:14px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:10px;font-size:13px}
.foot-col a{color:rgba(255,255,255,.6);transition:.2s}
.foot-col a:hover{color:#fff}
.foot-contact .tel{font-size:22px;color:#fff;font-weight:700;margin-bottom:6px}
.foot-contact .tel-label{font-size:12px;color:rgba(255,255,255,.5);margin-bottom:14px}
.foot-contact p{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:6px}.foot-contact .contact-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:13px;color:rgba(255,255,255,.7);line-height:1.5}.foot-contact .contact-row img{width:16px;height:16px;flex-shrink:0;object-fit:contain;opacity:.85;display:block}.foot-contact .contact-row span{flex:1;min-width:0;word-break:break-all}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:12px;color:rgba(255,255,255,.4)}
.foot-bottom a{color:rgba(255,255,255,.5)}
/* 侧边悬浮 */
.floating{position:fixed;right:20px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;z-index:50}
.float-btn{width:56px;height:64px;background:#fff;border-radius:10px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:11px;color:var(--text2);cursor:pointer;transition:.2s}
.float-btn:hover{background:var(--primary);color:#fff}
.float-btn svg{width:22px;height:22px}
@media (max-width:960px){
  .nav-menu{display:none}
  .intro-grid,.info-grid,.foot-grid{grid-template-columns:1fr;gap:32px}
  .achieve-grid{grid-template-columns:repeat(2,1fr)}
  .about-banner{height:380px}
  .banner-cloud svg{width:130px;height:130px}
  .banner-cloud .brand{font-size:32px}
  .intro-head h2{font-size:26px}
  .floating{display:none}
}
/* ===== 关于我们页面：新增/调整 CSS ===== */
.intro-image{aspect-ratio:16/10;background:linear-gradient(135deg,#EEF5FF 0%,#F5F8FC 60%,#DCEBFF 100%);border-radius:16px;overflow:hidden;position:relative;box-shadow:0 6px 20px rgba(27,59,111,.08);border:1px dashed rgba(30,136,245,.25);display:flex;align-items:center;justify-content:center;transition:.3s}
.intro-image:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(30,136,245,.15);border-color:rgba(30,136,245,.5)}
.intro-image-inner{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px}
.intro-image-placeholder{width:55%;height:auto;max-width:220px;opacity:.7}
.intro-image-hint{font-size:13px;color:var(--muted);letter-spacing:2px;font-weight:500}
.intro-image img{display:block;width:100%;height:100%;object-fit:cover}
/* 地图卡：新版图片模式 */
.map-image{display:block;width:100%;height:100%;object-fit:fill;border-radius:20px}
.map-card .map-wrap{aspect-ratio:769/1024;background:#EEF5FF;position:relative;overflow:hidden;border-radius:20px}

/* 官方二维码：改用真实图片 */
.qr-follow-img img{width:100%;height:100%;object-fit:contain;display:block;border-radius:6px}


/* 带您了解我们·图片模式 */
.intro-image{border:none !important;background:#EEF5FF}
.intro-image img{display:block;width:100%;height:100%;object-fit:cover;border-radius:16px}


/* Banner 图片高质量渲染（无损显示） */
.about-banner .banner-bg-img{image-rendering:auto;image-rendering:-webkit-optimize-contrast;-ms-interpolation-mode:bicubic}