/* ============================================
   我爱云网络科技 - 官网样式（虚拟主机版）
   ============================================ */
:root{
  --c-primary:#1463F0;
  --c-primary-deep:#0B4ED0;
  --c-navy:#0A1E3F;
  --c-bg:#F5F7FB;
  --c-card:#FFFFFF;
  --c-text:#1B2537;
  --c-text2:#5C6B84;
  --c-line:#E3E9F2;
  --radius:10px;
  --shadow:0 10px 30px rgba(10,30,63,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  color:var(--c-text);
  background:var(--c-card);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1140px;margin:0 auto;padding:0 24px}
::selection{background:rgba(20,99,240,.18)}

/* ===== 头部导航 ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:42px;height:42px;flex:none;object-fit:contain}
.brand-name{font-size:20px;font-weight:700;letter-spacing:1px;color:var(--c-navy)}
.brand-name small{display:block;font-size:11px;font-weight:400;letter-spacing:2.5px;color:var(--c-text2);line-height:1.3}
.main-nav{display:flex;gap:34px}
.main-nav a{position:relative;font-size:15px;color:var(--c-text);padding:6px 0;transition:color .2s}
.main-nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--c-primary);transition:width .25s}
.main-nav a:hover,.main-nav a.active{color:var(--c-primary)}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.nav-toggle{display:none;border:1px solid var(--c-line);background:var(--c-card);width:44px;height:44px;border-radius:8px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-navy);transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;min-height:calc(100vh - 68px);min-height:560px;display:flex;align-items:center;background-size:cover;background-position:center}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--c-navy),rgba(10,30,63,.72) 55%,rgba(10,30,63,.55))}
.hero-inner{position:relative;max-width:1140px;margin:0 auto;padding:0 24px;width:100%}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;color:#BFD5FF;font-size:13px;letter-spacing:4px;margin-bottom:22px}
.hero-eyebrow::before{content:"";width:34px;height:1px;background:var(--c-primary)}
.hero h1{color:#fff;font-size:clamp(34px,5.4vw,58px);font-weight:700;letter-spacing:2px;line-height:1.25;margin-bottom:18px}
.hero h1 em{font-style:normal;color:#6FA6FF}
.hero p{color:rgba(255,255,255,.86);font-size:clamp(15px,2vw,18px);max-width:640px;margin-bottom:38px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 34px;border-radius:var(--radius);font-size:15px;font-weight:500;border:1px solid transparent;cursor:pointer;transition:all .25s}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.65);color:#fff;background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}

/* ===== 章节 ===== */
.section{padding:96px 0}
.section-alt{background:var(--c-bg)}
.section-head{text-align:center;margin-bottom:56px}
.section-head .label{display:inline-block;font-size:13px;letter-spacing:4px;color:var(--c-primary);margin-bottom:10px}
.section-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:700;color:var(--c-navy);letter-spacing:1px;margin-bottom:12px}
.section-head .divider{width:46px;height:3px;border-radius:2px;margin:0 auto 16px;background:linear-gradient(90deg,var(--c-primary),#7FB0FF)}
.section-head p{color:var(--c-text2);font-size:15px;max-width:640px;margin:0 auto}

/* ===== 公司介绍 ===== */
.about-grid{display:grid;grid-template-columns:46% 1fr;gap:60px;align-items:center}
.about-img{position:relative}
.about-img img{width:100%;height:100%;min-height:320px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
.about-img::after{content:"";position:absolute;left:-14px;bottom:-14px;width:70%;height:70%;border:2px solid var(--c-primary);border-radius:var(--radius);z-index:-1}
.about-text .label{font-size:13px;letter-spacing:4px;color:var(--c-primary);margin-bottom:10px}
.about-text h2{font-size:clamp(24px,3vw,32px);color:var(--c-navy);font-weight:700;margin-bottom:20px}
.about-text p{color:var(--c-text2);margin-bottom:16px;text-align:justify}
.biz-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.biz-item{display:flex;gap:12px;align-items:flex-start;background:var(--c-bg);border:1px solid var(--c-line);padding:16px 18px;border-radius:var(--radius)}
.biz-item svg{width:22px;height:22px;flex:none;color:var(--c-primary);margin-top:2px}
.biz-item h4{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:2px}
.biz-item p{font-size:14px;color:var(--c-text2);margin:0;text-align:left}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.contact-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.contact-card .icon{width:48px;height:48px;border-radius:12px;margin-bottom:18px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(20,99,240,.14),rgba(20,99,240,.05));color:var(--c-primary)}
.contact-card .icon svg{width:24px;height:24px}
.contact-card h4{font-size:15px;color:var(--c-text2);font-weight:400;margin-bottom:6px}
.contact-card .value{font-size:16px;font-weight:600;color:var(--c-navy);word-break:break-all}

/* ===== 在线留言 ===== */
.msg-wrap{display:grid;grid-template-columns:38% 1fr;gap:56px;align-items:start}
.msg-aside .label{font-size:13px;letter-spacing:4px;color:var(--c-primary);margin-bottom:10px}
.msg-aside h2{font-size:clamp(22px,3vw,30px);color:var(--c-navy);font-weight:700;margin-bottom:16px}
.msg-aside p{color:var(--c-text2);margin-bottom:26px;text-align:justify}
.msg-aside .quick{display:flex;flex-direction:column;gap:14px}
.msg-aside .quick li{display:flex;gap:10px;align-items:center;color:var(--c-text2);font-size:14px}
.msg-aside .quick svg{width:18px;height:18px;color:var(--c-primary);flex:none}
.msg-form{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:36px 34px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-item{margin-bottom:18px}
.form-item label{display:block;font-size:14px;color:var(--c-text);font-weight:500;margin-bottom:8px}
.form-item label i{font-style:normal;color:#E5484D;margin-left:2px}
.form-item input,.form-item textarea{width:100%;padding:12px 14px;font-size:14px;font-family:inherit;border:1px solid var(--c-line);border-radius:8px;background:var(--c-bg);color:var(--c-text);outline:none;transition:border-color .2s,box-shadow .2s;resize:vertical}
.form-item input:focus,.form-item textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(20,99,240,.12);background:#fff}
.captcha-row{display:flex;gap:12px;align-items:stretch}
.captcha-row input{flex:1}
.captcha-box{width:130px;border:1px solid var(--c-line);border-radius:8px;overflow:hidden;cursor:pointer;background:#f0f4f8;display:flex;align-items:center;justify-content:center}
.captcha-box img{width:100%;height:100%;object-fit:cover}
.captcha-tip{font-size:12px;color:var(--c-text2);margin-top:6px}
.form-submit{width:100%;padding:14px;margin-top:6px;background:var(--c-primary);color:#fff;border:none;border-radius:var(--radius);font-size:16px;font-weight:500;cursor:pointer;transition:background .25s,transform .25s}
.form-submit:hover{background:var(--c-primary-deep);transform:translateY(-2px)}

/* ===== 友情链接 ===== */
.links-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.links-bar a{padding:11px 22px;font-size:14px;color:var(--c-text2);background:var(--c-card);border:1px solid var(--c-line);border-radius:20px;transition:all .25s}
.links-bar a:hover{color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-2px)}

/* ===== 页脚 ===== */
.site-footer{background:var(--c-navy);color:rgba(255,255,255,.72);padding:52px 0 0;font-size:14px}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:36px}
.footer-brand{max-width:340px}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-name small{color:rgba(255,255,255,.55)}
.footer-brand .brand-mark{background:#fff;border-radius:8px;padding:2px}
.footer-brand p{margin-top:16px;color:rgba(255,255,255,.62)}
.footer-cols{display:flex;gap:72px;flex-wrap:wrap}
.footer-cols h5{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:1px}
.footer-cols ul li{margin-bottom:10px;color:rgba(255,255,255,.62)}
.footer-cols a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;color:rgba(255,255,255,.48);font-size:13px}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#fff}

/* ===== Toast ===== */
.toast{position:fixed;left:50%;bottom:40px;transform:translate(-50%,20px);background:var(--c-navy);color:#fff;padding:13px 26px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:all .3s;z-index:999;box-shadow:0 10px 30px rgba(10,30,63,.3)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .nav-toggle{display:flex}
  .main-nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--c-line);max-height:0;overflow:hidden;transition:max-height .35s ease}
  .main-nav.open{max-height:320px}
  .main-nav a{padding:15px 24px;border-bottom:1px solid var(--c-line);font-size:15px}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .contact-grid{grid-template-columns:1fr 1fr}
  .msg-wrap{grid-template-columns:1fr;gap:40px}
  .section{padding:72px 0}
}
@media (max-width:640px){
  .contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .biz-list{grid-template-columns:1fr}
  .footer-cols{gap:36px}
  .section{padding:56px 0}
  .form-item input,.form-item textarea{font-size:16px}
  .captcha-row{flex-wrap:wrap}
  .captcha-box{width:100%;height:56px}
}