/* =========================================================
   云启数科 · 云计算代理企业官网
   公共样式（官网首页 / 登录 / 注册）
   设计基调：科技深蓝 + 天青渐变，原创视觉，无外部依赖
   ========================================================= */
:root{
  --blue-950:#041a3d;
  --blue-900:#07244f;
  --blue-800:#0a326b;
  --blue-700:#0d4189;
  --primary:#155df0;
  --primary-600:#0d4fd4;
  --cyan:#12b7e6;
  --cyan-soft:#e3f7ff;
  --ink:#0d1b33;
  --ink-2:#41557a;
  --ink-3:#6d82a6;
  --bg:#f3f6fb;
  --card:#ffffff;
  --line:#e2e9f5;
  --ok:#16a34a;
  --warn:#f59e0b;
  --danger:#e5484d;
  --radius:14px;
  --shadow:0 12px 34px rgba(13,42,99,.10);
  --shadow-lg:0 24px 60px rgba(13,42,99,.16);
  --font:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:rgba(0,183,230,.25)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:10px;
  font-size:15px;font-weight:600;cursor:pointer;border:none;
  transition:transform .18s,box-shadow .18s,background .18s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--cyan));color:#fff;box-shadow:0 8px 20px rgba(13,93,240,.30)}
.btn-primary:hover{box-shadow:0 12px 26px rgba(13,93,240,.40)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-outline{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn-outline:hover{background:var(--cyan-soft)}
.btn-lg{height:52px;padding:0 34px;font-size:16px;border-radius:12px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- 顶部工具条 ---------- */
.topbar{background:var(--blue-950);color:#cdd9ee;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cdd9ee;transition:color .2s}
.topbar a:hover{color:#fff}
.topbar .tb-links{display:flex;gap:20px;align-items:center}
.topbar .tb-phone{color:var(--cyan);font-weight:600;letter-spacing:.3px}

/* ---------- 主导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav .container{display:flex;align-items:center;height:72px;gap:28px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand .logo{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--primary),var(--cyan));display:grid;place-items:center;box-shadow:0 6px 16px rgba(13,93,240,.30)}
.brand .bname{font-size:19px;font-weight:800;color:var(--blue-800);letter-spacing:.5px}
.brand .bname small{display:block;font-size:10px;font-weight:500;color:var(--ink-3);letter-spacing:2px;margin-top:-2px}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-menu a{
  padding:8px 14px;border-radius:8px;font-size:15px;font-weight:600;color:var(--ink-2);
  transition:color .2s,background .2s;
}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary);background:rgba(13,93,240,.07)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-user{display:flex;align-items:center;gap:10px}
.nav-user .avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--cyan));color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}
.nav-user .uname{font-weight:600;color:var(--ink);max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dropdown{position:relative}
.dropdown-menu{
  position:absolute;right:0;top:calc(100% + 8px);min-width:170px;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);
  padding:8px;display:none;z-index:50;
}
.dropdown.open .dropdown-menu{display:block}
.dropdown-menu a,.dropdown-menu button{
  display:flex;width:100%;text-align:left;padding:10px 12px;border-radius:8px;
  color:var(--ink-2);font-size:14px;font-weight:600;background:none;border:none;cursor:pointer;
}
.dropdown-menu a:hover,.dropdown-menu button:hover{background:var(--bg);color:var(--primary)}
.dropdown-menu .sep{height:1px;background:var(--line);margin:6px 4px}
.dropdown-menu .danger:hover{color:var(--danger)}

/* 移动端菜单按钮 */
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}

/* ---------- 首屏 Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:radial-gradient(1200px 600px at 85% -10%,rgba(0,183,230,.35),transparent 60%),
             linear-gradient(120deg,var(--blue-950) 0%,var(--blue-700) 60%,#0a4aa8 100%);
}
.hero .grid-bg{
  position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 70%);
}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;padding-top:74px;padding-bottom:66px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:30px;
  background:rgba(0,183,230,.16);border:1px solid rgba(0,183,230,.4);color:#8fe4ff;font-size:13px;font-weight:600;
}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;margin:20px 0 6px;letter-spacing:.5px}
.hero h1 .grad{background:linear-gradient(90deg,#7fe0ff,#5aa2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:17px;color:#c6d6f2;max-width:560px;margin-top:14px}
.hero .cta{display:flex;gap:14px;margin-top:30px}
.hero .stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:46px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.16);
}
.hero .stats b{font-size:26px;font-weight:800;display:block;color:#fff}
.hero .stats span{font-size:12.5px;color:#9db4da}

/* 云网插画 */
.hero-art{position:relative;height:420px}
.hero-art svg{width:100%;height:100%}
.pulse{animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.12);opacity:1}}
.dash{stroke-dasharray:6 8;animation:dashmove 18s linear infinite}
@keyframes dashmove{to{stroke-dashoffset:-560}}
.float-slow{animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ---------- 区块通用 ---------- */
.section{padding:72px 0}
.section-head{max-width:720px;margin:0 auto 42px;text-align:center}
.section-head .eyebrow{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:2px;margin-bottom:10px}
.section-head h2{font-size:32px;font-weight:800;color:var(--blue-800);letter-spacing:.5px}
.section-head p{color:var(--ink-2);margin-top:12px;font-size:15.5px}

/* ---------- 活动横幅 ---------- */
.offer-band{background:linear-gradient(90deg,#0a326b,#0d4189);color:#fff}
.offer-band .container{display:flex;align-items:center;justify-content:space-between;padding-top:22px;padding-bottom:22px;gap:18px;flex-wrap:wrap}
.offer-tag{display:inline-block;background:linear-gradient(135deg,var(--cyan),var(--primary));padding:3px 12px;border-radius:20px;font-size:12px;font-weight:700;margin-right:10px}
.offer-band h3{font-size:20px;font-weight:700}
.offer-band p{color:#c6d6f2;font-size:14px;margin-top:4px}

/* ---------- 产品分类 Tab + 网格 ---------- */
.tabs{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.tab{
  padding:9px 22px;border-radius:30px;border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;transition:.2s;
}
.tab:hover{color:var(--primary);border-color:var(--primary)}
.tab.active{background:linear-gradient(135deg,var(--primary),var(--cyan));color:#fff;border-color:transparent;box-shadow:0 6px 18px rgba(13,93,240,.28)}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.panel{display:none}
.panel.active{display:grid}
.p-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
  transition:transform .22s,box-shadow .22s,border-color .22s;cursor:pointer;position:relative;overflow:hidden;
}
.p-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#c9dcff}
.p-icon{width:50px;height:50px;border-radius:13px;background:linear-gradient(135deg,rgba(13,93,240,.10),rgba(0,183,230,.14));display:grid;place-items:center;margin-bottom:16px}
.p-icon svg{width:26px;height:26px;stroke:var(--primary);fill:none;stroke-width:1.8}
.p-card h4{font-size:16.5px;font-weight:700;color:var(--blue-800)}
.p-card p{font-size:13.5px;color:var(--ink-2);margin-top:8px;min-height:38px}
.p-card .link{display:inline-flex;align-items:center;gap:6px;margin-top:14px;color:var(--primary);font-size:13.5px;font-weight:600}
.p-card .link svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .2s}
.p-card:hover .link svg{transform:translateX(4px)}
.p-card .hot{position:absolute;top:14px;right:-34px;background:linear-gradient(135deg,#ff8a3d,#ff5d5d);color:#fff;font-size:11px;font-weight:700;padding:3px 38px;transform:rotate(38deg)}

/* ---------- 解决方案 ---------- */
.solutions{background:linear-gradient(180deg,#fff,var(--bg))}
.sol-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.sol-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;
  position:relative;overflow:hidden;transition:.22s;
}
.sol-card::after{content:"";position:absolute;inset:auto 0 0 0;height:4px;background:linear-gradient(90deg,var(--primary),var(--cyan));opacity:0;transition:.25s}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.sol-card:hover::after{opacity:1}
.sol-card .num{font-size:12px;font-weight:700;color:var(--cyan);letter-spacing:1px}
.sol-card h4{font-size:17px;font-weight:700;color:var(--blue-800);margin-top:8px}
.sol-card p{font-size:13.5px;color:var(--ink-2);margin-top:8px}
.sol-card .tag{display:inline-block;margin-top:14px;font-size:12px;font-weight:600;color:var(--primary);background:rgba(13,93,240,.08);padding:3px 10px;border-radius:6px}

/* ---------- 代理合作（特色板块） ---------- */
.partner{background:var(--blue-950);color:#fff;position:relative;overflow:hidden}
.partner::before{content:"";position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(0,183,230,.22),transparent 60%);top:-240px;right:-140px}
.partner .container{position:relative;z-index:2}
.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.p-adv{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:26px;backdrop-filter:blur(4px)}
.p-adv .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--cyan),var(--primary));display:grid;place-items:center;margin-bottom:16px}
.p-adv .ic svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:2}
.p-adv h4{font-size:16px;font-weight:700;margin-bottom:8px}
.p-adv p{font-size:13.5px;color:#b9c8e2}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:46px}
.process .step{position:relative;padding:0 22px;text-align:center}
.process .step:not(:last-child)::after{content:"";position:absolute;top:24px;left:calc(50% + 34px);width:calc(100% - 68px);height:2px;background:linear-gradient(90deg,rgba(0,183,230,.5),transparent)}
.process .dot{width:48px;height:48px;border-radius:50%;margin:0 auto 14px;background:linear-gradient(135deg,var(--cyan),var(--primary));display:grid;place-items:center;font-weight:800;font-size:18px;box-shadow:0 8px 20px rgba(0,183,230,.4)}
.process h5{font-size:15px;font-weight:700}
.process p{font-size:13px;color:#b9c8e2;margin-top:6px}
.partner .cta-row{text-align:center;margin-top:44px}

/* ---------- 合规资质 ---------- */
.cert-band{background:#fff;border-top:1px solid var(--line)}
.cert-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert{display:flex;align-items:center;gap:14px;padding:22px;border:1px solid var(--line);border-radius:var(--radius)}
.cert .ci{width:44px;height:44px;border-radius:12px;background:var(--cyan-soft);display:grid;place-items:center;flex-shrink:0}
.cert .ci svg{width:24px;height:24px;stroke:var(--primary);fill:none;stroke-width:1.8}
.cert b{display:block;color:var(--blue-800);font-size:15px}
.cert span{font-size:12.5px;color:var(--ink-3)}

/* ---------- 客户案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.22s}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.case-card .industry{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);background:rgba(13,93,240,.08);padding:3px 10px;border-radius:6px}
.case-card h4{font-size:16.5px;color:var(--blue-800);margin:12px 0 8px;font-weight:700}
.case-card p{font-size:13.5px;color:var(--ink-2)}

/* ---------- 支持服务区 ---------- */
.support{background:linear-gradient(135deg,var(--blue-800),var(--blue-950));color:#fff}
.support .container{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.support h2{font-size:28px;font-weight:800}
.support p{color:#c6d6f2;margin-top:10px;font-size:14.5px}
.support-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:26px}
.sup-item{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:16px 18px;transition:.2s}
.sup-item:hover{background:rgba(255,255,255,.14)}
.sup-item svg{width:22px;height:22px;stroke:var(--cyan);fill:none;stroke-width:2;flex-shrink:0}
.sup-item b{display:block;font-size:14.5px}
.sup-item span{font-size:12.5px;color:#b9c8e2}
.support .hotline{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:18px;padding:34px;text-align:center;backdrop-filter:blur(6px)}
.support .hotline b{display:block;font-size:13px;color:#c9d6ef;font-weight:600}
.support .hotline .num{font-size:34px;font-weight:800;color:#fff;letter-spacing:1px;margin:12px 0;background:linear-gradient(90deg,#7fe0ff,#9cc0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.support .hotline p{font-size:12.5px;color:#b9c8e2;margin:0}

/* ---------- 页脚 ---------- */
.footer{background:var(--blue-950);color:#b9c8e2;padding:60px 0 0}
.footer .container{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:30px;padding-bottom:44px}
.footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer .fcol li{margin-bottom:11px;font-size:13.5px}
.footer .fcol a:hover{color:#fff}
.footer .fbrand{color:#d7e2f5}
.footer .fbrand .bname{font-size:20px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer .f-tel{font-size:20px;font-weight:800;color:var(--cyan);margin:14px 0 4px}
.footer .fdesc{font-size:13px;line-height:1.9}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-top:0;padding-bottom:0;flex-wrap:wrap;font-size:12.5px;color:#7f93bd}
.footer-bottom a{color:#7f93bd}
.footer-bottom a:hover{color:#fff}

/* ---------- 登录 / 注册 ---------- */
.auth-page{
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px 20px;
  background:radial-gradient(900px 500px at 15% -10%,rgba(0,183,230,.20),transparent 55%),
             radial-gradient(900px 500px at 105% 110%,rgba(13,93,240,.20),transparent 55%),
             linear-gradient(160deg,#0a326b,#072b4f);
}
.auth-card{width:100%;max-width:440px;background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);overflow:hidden;animation:rise .5s ease}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.auth-brand{display:flex;align-items:center;justify-content:center;gap:12px;padding:34px 34px 6px}
.auth-brand .logo{width:46px;height:46px;border-radius:13px;background:linear-gradient(135deg,var(--primary),var(--cyan));display:grid;place-items:center;box-shadow:0 8px 20px rgba(13,93,240,.35)}
.auth-brand .bname{font-size:21px;font-weight:800;color:var(--blue-800)}
.auth-brand .bname small{display:block;font-size:11px;color:var(--ink-3);letter-spacing:2px}
.auth-card{padding:18px 34px 36px}
.auth-head{text-align:center;margin:6px 0 22px}
.auth-head h1{font-size:22px;color:var(--blue-800)}
.auth-head p{font-size:13.5px;color:var(--ink-3);margin-top:6px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field label i{color:var(--danger);font-style:normal}
.input-wrap{position:relative}
.input-wrap svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--ink-3);fill:none;stroke-width:1.9}
.input-wrap .eye{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--ink-3);padding:4px}
.input-wrap .eye:hover{color:var(--primary)}
.input-wrap input{
  width:100%;height:46px;border:1px solid var(--line);border-radius:10px;padding:0 14px 0 42px;
  font-size:15px;transition:border-color .2s,box-shadow .2s;background:#fbfcfe;
}
.input-wrap input.noicon{padding-left:14px}
.input-wrap input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(13,93,240,.12)}
.form-msg{font-size:12.5px;margin-top:4px}
.form-msg.err{color:var(--danger)}
.form-msg.ok{color:var(--green)}
.agree{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--ink-2);line-height:1.5}
.agree input{margin-top:3px;accent-color:var(--primary)}
.agree a{color:var(--primary)}
.auth-foot{text-align:center;font-size:13.5px;color:var(--ink-2);margin-top:16px}
.auth-foot a{color:var(--primary);font-weight:600}
.auth-alt{display:flex;align-items:center;gap:12px;color:var(--ink-3);font-size:12.5px;margin:20px 0 16px}
.auth-alt::before,.auth-alt::after{content:"";flex:1;height:1px;background:var(--line)}
.demo-tip{background:var(--cyan-soft);border:1px dashed #8fd6ef;border-radius:10px;padding:12px 14px;font-size:12.5px;color:#0a7aa6;line-height:1.8;margin-top:18px}
.demo-tip b{color:#06607f}

/* ---------- 提示 toast ---------- */
.toast{
  position:fixed;top:22px;left:50%;transform:translateX(-50%) translateY(-90px);
  background:var(--blue-800);color:#fff;padding:13px 22px;border-radius:10px;
  font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);z-index:999;
  transition:transform .35s cubic-bezier(.2,.9,.3,1.3);opacity:0;pointer-events:none;
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
.toast.err{background:var(--danger)}

/* ---------- 通用工具 ---------- */
.mt16{margin-top:16px}
.mt28{margin-top:28px}
.center{text-align:center}
.text-danger{color:var(--danger)}

/* ---------- 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .product-grid,.sol-grid,.partner-grid,.cert-grid{grid-template-columns:repeat(3,1fr)}
  .hero h1{font-size:38px}
}
@media (max-width:880px){
  .hero .container{grid-template-columns:1fr;padding-top:52px;padding-bottom:52px}
  .hero-art{height:300px;max-width:520px;margin:0 auto}
  .product-grid,.sol-grid,.partner-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:1fr}
  .support .container{grid-template-columns:1fr}
  .footer .container{grid-template-columns:repeat(2,1fr)}
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .process{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .process .step:not(:last-child)::after{display:none}
}
@media (max-width:560px){
  .product-grid,.sol-grid,.partner-grid,.case-grid{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero .stats{grid-template-columns:repeat(2,1fr);gap:18px}
  .topbar .tb-links{display:none}
  .nav .nav-actions .btn{display:none}
  .nav-user .uname{display:none}
}