/* ============================================================
   武汉无忧云计算有限责任公司 官网样式
   深色科技风 · 移动优先 · 无外部依赖
   ============================================================ */

:root{
  --bg:#060b12;
  --bg-2:#0a111b;
  --bg-3:#0e1725;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --text:#e8eef6;
  --muted:#8fa0b5;
  --brand:#16b981;
  --brand-2:#22d3a0;
  --brand-soft:rgba(22,185,129,.13);
  --accent:#3b82f6;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.75);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
  line-height:1.75;font-size:16px;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.35;letter-spacing:-.01em}
p{margin:0}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.container.narrow{max-width:840px}

/* ---------- 通用 ---------- */
.grad{
  background:linear-gradient(100deg,var(--brand-2),#61e6c1 40%,var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.25s ease;white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  color:#032015;box-shadow:0 14px 34px -12px rgba(22,185,129,.65);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 40px -12px rgba(22,185,129,.8)}
.btn-ghost{border-color:var(--line-2);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-block{width:100%}

.tag{
  display:inline-block;padding:5px 14px;border-radius:999px;font-size:12.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--brand-2);
  background:var(--brand-soft);border:1px solid rgba(22,185,129,.28);margin-bottom:18px;
}
.tag-light{color:#7ff0cf;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.22)}

.section{padding:96px 0;position:relative}
.section-alt{background:linear-gradient(180deg,var(--bg-2),var(--bg));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{font-size:clamp(25px,3.4vw,38px);font-weight:700;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;transition:.3s ease;
  border-bottom:1px solid transparent;backdrop-filter:blur(0);
}
.site-header.scrolled{
  background:rgba(6,11,18,.86);backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.brand{display:flex;align-items:center;gap:11px}
.brand-logo{
  width:44px;height:44px;flex:0 0 44px;border-radius:11px;object-fit:cover;
  background:#023470;box-shadow:0 8px 22px -10px rgba(0,120,255,.85);
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),#0e9e6c);color:#04231a;
  font-weight:800;font-size:19px;box-shadow:0 8px 22px -8px rgba(22,185,129,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16.5px;letter-spacing:.02em}
.brand-text em{font-style:normal;font-size:9.5px;color:var(--muted);letter-spacing:.11em}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  padding:9px 14px;border-radius:9px;font-size:14.5px;color:#c3d0e0;transition:.2s;
}
.nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-cta{
  margin-left:8px;background:linear-gradient(100deg,var(--brand),var(--brand-2));
  color:#032015 !important;font-weight:600;
}
.nav-cta:hover{filter:brightness(1.08)}

.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:11px;
  background:rgba(255,255,255,.04);cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#dbe6f2;margin:3px auto;border-radius:2px;transition:.25s}

/* ---------- Hero ---------- */
.hero{position:relative;padding:150px 0 96px;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.orb-1{width:520px;height:520px;background:#0f9c71;top:-180px;left:-140px}
.orb-2{width:460px;height:460px;background:#1d4ed8;bottom:-200px;right:-120px;opacity:.35}
.grid-mask{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 78%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:13px;color:#a9d8c8;
  background:rgba(22,185,129,.1);border:1px solid rgba(22,185,129,.28);
  padding:7px 15px;border-radius:999px;margin-bottom:24px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 4px rgba(34,211,160,.18)}
.hero h1{font-size:clamp(30px,4.6vw,54px);font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
.lead{color:#a7b6c9;font-size:16.5px;max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;border-top:1px solid var(--line);padding-top:26px}
.hero-facts li{display:flex;flex-direction:column}
.hero-facts strong{font-size:clamp(19px,2.4vw,26px);color:var(--brand-2);font-weight:800}
.hero-facts span{font-size:12.5px;color:var(--muted)}

/* hero 视觉 */
.hero-visual{position:relative;min-height:340px}
.code-card{
  background:linear-gradient(160deg,rgba(19,30,45,.95),rgba(10,17,27,.95));
  border:1px solid var(--line-2);border-radius:var(--radius);padding:18px 20px;
  box-shadow:var(--shadow);position:relative;z-index:2;
}
.code-dots{display:flex;gap:7px;margin-bottom:14px}
.code-dots i{width:11px;height:11px;border-radius:50%;background:#2a3a4f}
.code-dots i:first-child{background:#ef5350}
.code-dots i:nth-child(2){background:#ffb74d}
.code-dots i:nth-child(3){background:#4caf82}
.code-card pre{margin:0;overflow-x:auto;font-size:13.5px;line-height:1.85;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.c-key{color:#c084fc}.c-fn{color:#38bdf8}.c-prop{color:#7dd3fc}
.c-str{color:#a5e8b0}.c-bool{color:#fbbf24}.c-cmt{color:#5b7086;font-style:italic}
.float-card{
  position:absolute;display:flex;align-items:center;gap:10px;
  background:rgba(14,23,37,.94);border:1px solid var(--line-2);border-radius:13px;
  padding:11px 15px;font-size:12.5px;color:#cfdbe9;box-shadow:var(--shadow);z-index:3;
}
.float-card b{font-weight:600;white-space:nowrap}
.fc-1{bottom:-14px;left:-8px;flex-direction:column;align-items:flex-start;gap:8px}
.bar{display:block;width:130px;height:5px;border-radius:99px;background:rgba(255,255,255,.12);overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.fc-2{top:-16px;right:-6px}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 0 rgba(34,211,160,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(34,211,160,0)}100%{box-shadow:0 0 0 0 rgba(34,211,160,0)}}

/* ---------- 服务卡片 ---------- */
.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.service-card{
  background:linear-gradient(165deg,var(--bg-3),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  transition:.3s ease;position:relative;overflow:hidden;
}
.service-card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(400px circle at 0% 0%,rgba(22,185,129,.14),transparent 60%);
  opacity:0;transition:.35s;
}
.service-card:hover{border-color:rgba(22,185,129,.42);transform:translateY(-4px);box-shadow:var(--shadow)}
.service-card:hover::after{opacity:1}
.sc-head{display:flex;gap:15px;align-items:flex-start;margin-bottom:22px}
.sc-icon{
  width:46px;height:46px;flex:0 0 46px;border-radius:13px;display:grid;place-items:center;
  background:var(--brand-soft);border:1px solid rgba(22,185,129,.3);color:var(--brand-2);
}
.sc-icon svg{width:23px;height:23px}
.sc-head h3{font-size:18.5px;margin-bottom:5px}
.sc-head p{font-size:13.5px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips li{
  font-size:13px;padding:6px 13px;border-radius:8px;color:#c6d4e4;
  background:rgba(255,255,255,.045);border:1px solid var(--line);transition:.2s;
}
.chips li:hover{background:rgba(22,185,129,.14);border-color:rgba(22,185,129,.4);color:#e9fff8}

/* ---------- 优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.adv-card{
  background:rgba(255,255,255,.028);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;transition:.3s;
}
.adv-card:hover{border-color:var(--line-2);background:rgba(255,255,255,.05);transform:translateY(-4px)}
.adv-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(22,185,129,.22),rgba(59,130,246,.14));
  border:1px solid rgba(22,185,129,.26);color:#8ef0d2;
}
.adv-icon svg{width:22px;height:22px}
.adv-card h3{font-size:16.5px;margin-bottom:10px}
.adv-card p{font-size:13.8px;color:var(--muted);line-height:1.8}

/* ---------- 交易流程 ---------- */
.flow{position:relative;padding-left:8px}
.flow-line{
  position:absolute;left:33px;top:14px;bottom:70px;width:2px;
  background:linear-gradient(180deg,rgba(22,185,129,.75),rgba(59,130,246,.35),transparent);
}
.flow-step{position:relative;display:flex;gap:26px;padding-bottom:26px}
.fs-num{
  flex:0 0 66px;width:66px;height:66px;border-radius:18px;display:grid;place-items:center;
  font-weight:800;font-size:17px;letter-spacing:.02em;color:#9defd2;
  background:linear-gradient(160deg,#10202e,#0b1521);
  border:1px solid rgba(22,185,129,.35);z-index:2;
  box-shadow:0 12px 28px -16px rgba(0,0,0,.9);
}
.fs-body{
  flex:1;background:linear-gradient(165deg,rgba(20,32,48,.7),rgba(10,17,27,.7));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;transition:.28s;
}
.flow-step:hover .fs-body{border-color:rgba(22,185,129,.4);transform:translateX(4px)}
.fs-body h3{font-size:17.5px;margin-bottom:8px}
.fs-body p{font-size:14.2px;color:#a9b8ca}
.fs-meta{
  display:inline-block;margin-top:12px;font-size:12.5px;color:#7fe3c4;
  background:rgba(22,185,129,.1);border:1px solid rgba(22,185,129,.24);
  padding:4px 12px;border-radius:99px;
}
.pay-note{
  margin-top:26px;padding:26px 28px;border-radius:var(--radius);
  background:rgba(22,185,129,.06);border:1px solid rgba(22,185,129,.24);
}
.pay-note strong{display:block;margin-bottom:12px;color:#8ef0d2;font-size:15.5px}
.pay-note ul{display:grid;gap:8px}
.pay-note li{position:relative;padding-left:20px;font-size:14px;color:#b6c5d6}
.pay-note li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--brand-2)}

/* ---------- 技术栈 ---------- */
.stack-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stack-col{background:rgba(255,255,255,.028);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.stack-col h4{font-size:14px;color:var(--brand-2);letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.stack-col li{font-size:14px;color:#b9c7d7;padding:7px 0;border-bottom:1px dashed rgba(255,255,255,.07)}
.stack-col li:last-child{border:0}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px}
.faq details{
  background:rgba(255,255,255,.028);border:1px solid var(--line);border-radius:12px;
  padding:0 22px;transition:.25s;
}
.faq details[open]{background:rgba(22,185,129,.06);border-color:rgba(22,185,129,.28)}
.faq summary{
  cursor:pointer;list-style:none;padding:18px 0;font-weight:600;font-size:15.5px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand-2);font-size:20px;font-weight:400;transition:.25s}
.faq details[open] summary::after{content:"−"}
.faq details p{font-size:14px;color:var(--muted);padding-bottom:20px;line-height:1.85}

/* ---------- 联系 ---------- */
.contact-section{background:linear-gradient(160deg,#07131a,#060b12 60%);border-top:1px solid var(--line)}
.contact-wrap{display:grid;grid-template-columns:1fr .92fr;gap:48px;align-items:start}
.contact-copy h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:14px}
.contact-copy > p{color:var(--muted);font-size:15px;margin-bottom:30px}
.contact-list{display:grid;gap:18px}
.contact-list li{display:flex;gap:14px;align-items:flex-start}
.ci{
  width:40px;height:40px;flex:0 0 40px;border-radius:11px;display:grid;place-items:center;
  background:rgba(22,185,129,.12);border:1px solid rgba(22,185,129,.28);color:#8ef0d2;
}
.ci svg{width:19px;height:19px}
.contact-list b{display:block;font-size:12.5px;color:var(--muted);font-weight:500;letter-spacing:.05em}
.contact-list a,.contact-list span{font-size:15.5px;color:#e6eef7}

/* 微信二维码 */
.qr-card{
  display:flex;gap:16px;align-items:center;margin-top:24px;padding:14px 16px;
  background:rgba(255,255,255,.045);border:1px solid var(--line-2);border-radius:14px;
}
.qr-img{
  width:132px;height:134px;flex:0 0 132px;border-radius:10px;background:#fff;padding:4px;
  box-shadow:0 10px 24px -12px rgba(0,0,0,.8);
}
.qr-text b{display:block;font-size:15px;margin-bottom:6px;color:#fff}
.qr-text p{font-size:13px;color:var(--muted);line-height:1.7}
.qr-hint{display:inline-block;margin-top:8px;font-size:12px;color:#7fe3c4}
.copyable{cursor:pointer;position:relative;border-bottom:1px dashed rgba(255,255,255,.28);transition:.2s}
.copyable:hover{color:var(--brand-2);border-bottom-color:rgba(34,211,160,.6)}
.copyable.copied::after{content:"已复制";position:absolute;left:0;top:-24px;font-size:11px;color:#032015;background:var(--brand-2);padding:1px 8px;border-radius:6px;white-space:nowrap}

.contact-form{
  background:linear-gradient(165deg,#0f1a28,#0a1119);border:1px solid var(--line-2);
  border-radius:20px;padding:32px;box-shadow:var(--shadow);
}
.contact-form h3{font-size:18px;margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:#a7b6c9;margin-bottom:7px}
.field label i{color:#ff6b6b;font-style:normal}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;font-size:14.5px;font-family:inherit;
  background:rgba(255,255,255,.04);border:1px solid var(--line-2);color:var(--text);
  transition:.2s;outline:none;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:#5f7287}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(22,185,129,.65);background:rgba(22,185,129,.06);
  box-shadow:0 0 0 3px rgba(22,185,129,.13);
}
.field select option{background:#0f1a28;color:var(--text)}
.form-hint{text-align:center;font-size:12px;color:#6b7f94;margin-top:12px}
.form-status{margin-top:10px;font-size:13.5px;text-align:center;min-height:20px}
.form-status.ok{color:#6ee7b7}
.form-status.err{color:#fca5a5}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding:44px 0 26px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid var(--line)}
.foot-brand{display:flex;gap:12px;align-items:center}
.foot-brand strong{font-size:15px;display:block}
.foot-brand p{font-size:12.5px;color:var(--muted)}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{font-size:13.5px;color:var(--muted);transition:.2s}
.foot-links a:hover{color:var(--brand-2)}
.copyright{padding-top:20px;font-size:12.5px;color:#6b7f94;text-align:center;display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;align-items:center}
.copyright .beian a{color:#7d8fa3;transition:.2s}
.copyright .beian a:hover{color:var(--brand-2)}
.copyright .beian a:hover{text-decoration:underline}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:24px;width:44px;height:44px;border-radius:12px;
  background:rgba(14,23,37,.92);border:1px solid var(--line-2);color:var(--brand-2);
  font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;z-index:90;
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:rgba(22,185,129,.16)}

/* ---------- 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero-visual{min-height:0;max-width:560px}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .stack-grid{grid-template-columns:repeat(2,1fr)}
  .contact-wrap{grid-template-columns:1fr;gap:38px}
}
@media (max-width:860px){
  .nav{
    position:fixed;top:74px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(6,11,18,.98);border-bottom:1px solid var(--line);
    padding:14px 20px 22px;gap:4px;backdrop-filter:blur(18px);
    transform:translateY(-120%);transition:.32s ease;visibility:hidden;
  }
  .nav.open{transform:none;visibility:visible}
  .nav a{padding:13px 12px;font-size:15.5px;border-radius:10px}
  .nav-cta{margin:10px 0 0;text-align:center}
  .nav-toggle{display:grid}
  .service-grid{grid-template-columns:1fr}
  .section{padding:72px 0}
  .hero{padding:120px 0 72px}
}
@media (max-width:600px){
  body{font-size:15px}
  .brand-text em{display:none}
  .hero-facts{grid-template-columns:repeat(2,1fr);gap:16px}
  .adv-grid{grid-template-columns:1fr}
  .stack-grid{grid-template-columns:1fr}
  .flow{gap:0;padding-left:0}
  .flow-line{left:26px}
  .flow-step{gap:16px}
  .fs-num{flex:0 0 52px;width:52px;height:52px;border-radius:14px;font-size:15px}
  .fs-body{padding:18px 18px}
  .contact-form{padding:24px 20px}
  .qr-card{gap:12px;padding:12px}
  .qr-img{width:104px;height:106px;flex:0 0 104px}
  .qr-text p{font-size:12.5px}
  .float-card{display:none}
  .hero-actions .btn{flex:1 1 100%}
  .pay-note{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}