/* ===========================================================
   Niceflix — 软件定制开发公司官网
   暗色 + 电光蓝/青，高端科技风
   =========================================================== */

:root{
  --bg:#070a12;
  --bg-2:#0b101d;
  --bg-3:#0e1424;
  --panel:rgba(255,255,255,.035);
  --panel-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);

  --txt:#e9edf6;
  --txt-2:#9aa6bd;
  --txt-3:#6b768c;

  --brand:#3d7bff;
  --brand-2:#5eead4;
  --accent:#3d7bff;

  --r-s:10px;
  --r:16px;
  --r-l:24px;

  --wrap:1200px;
  --nav-h:72px;

  --ease:cubic-bezier(.22,1,.36,1);
  --shadow:0 24px 60px -20px rgba(0,0,0,.7);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ---------- 背景 ---------- */
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 78%);
}
.bg-glow{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(720px 420px at 78% 6%,rgba(61,123,255,.20),transparent 62%),
    radial-gradient(560px 380px at 10% 26%,rgba(94,234,212,.10),transparent 60%);
}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  transition:background .35s var(--ease),border-color .35s,backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(7,10,18,.82);
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:var(--wrap);margin:0 auto;height:100%;
  padding:0 28px;display:flex;align-items:center;gap:36px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.03em;font-size:19px}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;color:#04070e;font-weight:900;font-size:17px;
  box-shadow:0 6px 20px -6px rgba(61,123,255,.8);
}
.nav-links{display:flex;gap:30px;margin-left:8px}
.nav-links a{font-size:14.5px;color:var(--txt-2);font-weight:500;position:relative;padding:6px 0;transition:color .22s}
.nav-links a::after{
  content:'';position:absolute;left:0;bottom:0;height:1.5px;width:0;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .3s var(--ease);
}
.nav-links a:hover{color:var(--txt)}
.nav-links a:hover::after{width:100%}

.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}

.lang-switch{
  display:flex;align-items:center;gap:5px;
  background:var(--panel);border:1px solid var(--line);
  border-radius:999px;padding:5px 13px;cursor:pointer;
  font-size:13px;font-weight:600;color:var(--txt-3);
  transition:border-color .25s,background .25s;
}
.lang-switch:hover{border-color:var(--line-2);background:var(--panel-2)}
.lang-opt{transition:color .25s}
.lang-opt.active{color:var(--txt)}
.lang-sep{opacity:.4}

.burger{display:none;width:38px;height:38px;border:1px solid var(--line);background:var(--panel);
  border-radius:10px;cursor:pointer;padding:0;place-items:center;gap:4px}
.burger span{display:block;width:16px;height:1.6px;background:var(--txt);border-radius:2px;transition:.3s var(--ease)}
.burger.open span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:11px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .28s,background .28s,border-color .28s;
  white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:16px 34px;font-size:16.5px}
.btn-block{width:100%}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),#5b8cff);
  color:#fff;box-shadow:0 10px 30px -10px rgba(61,123,255,.85);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(61,123,255,1)}
.btn-primary:disabled{opacity:.55;transform:none;cursor:not-allowed}
.btn-ghost{background:var(--panel);border-color:var(--line-2);color:var(--txt)}
.btn-ghost:hover{background:var(--panel-2);transform:translateY(-2px);border-color:rgba(255,255,255,.28)}

/* ---------- HERO ---------- */
.hero{position:relative;z-index:1;min-height:100vh;display:flex;align-items:center;
  padding:calc(var(--nav-h) + 70px) 0 80px}
.hero-media{position:absolute;inset:0;z-index:-1;overflow:hidden}
.hero-img{width:100%;height:100%;object-fit:cover;object-position:60% 30%;
  filter:saturate(.82) contrast(1.06) brightness(.62)}
.hero-scrim{
  position:absolute;inset:0;
  background:
    linear-gradient(100deg,rgba(7,10,18,.97) 8%,rgba(7,10,18,.80) 42%,rgba(7,10,18,.42) 72%,rgba(7,10,18,.62) 100%),
    linear-gradient(0deg,var(--bg) 2%,transparent 34%),
    radial-gradient(900px 500px at 72% 40%,rgba(61,123,255,.14),transparent 70%);
}
.hero-content{max-width:900px}

.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--panel);border:1px solid var(--line-2);
  padding:7px 16px;border-radius:999px;font-size:13px;color:var(--txt-2);
  font-weight:500;margin-bottom:28px;
  backdrop-filter:blur(10px);
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:#34d399;
  box-shadow:0 0 0 4px rgba(52,211,153,.16);animation:pulse 2.2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 9px rgba(52,211,153,0)}}

.hero-title{font-size:clamp(38px,5.6vw,74px);font-weight:800;letter-spacing:-.035em;margin-bottom:26px}
.hero-title .l1{display:block;font-size:clamp(17px,1.7vw,23px);font-weight:500;color:var(--txt-2);
  letter-spacing:0;margin-bottom:14px}
.hero-title .l2{display:block}
.accent{
  background:linear-gradient(120deg,var(--brand) 10%,var(--brand-2) 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:clamp(16px,1.35vw,19px);color:var(--txt-2);max-width:640px;margin-bottom:40px;line-height:1.75}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:64px}

.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:760px;
  padding-top:34px;border-top:1px solid var(--line)}
.stat b{display:block;font-size:clamp(26px,2.8vw,38px);font-weight:800;letter-spacing:-.03em;line-height:1.1}
.stat b em{font-style:normal;font-size:.5em;color:var(--brand-2);margin-left:2px;font-weight:600}
.stat span{font-size:13.5px;color:var(--txt-3);letter-spacing:.02em}

.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  width:22px;height:36px;border:1.5px solid var(--line-2);border-radius:12px}
.hero-scroll span{position:absolute;top:7px;left:50%;width:3px;height:6px;border-radius:2px;
  background:var(--txt-3);transform:translateX(-50%);animation:scroll 1.9s infinite}
@keyframes scroll{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,13px)}}

/* ---------- 通用 section ---------- */
.section{position:relative;z-index:1;padding:110px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.017) 18%,rgba(255,255,255,.017) 82%,transparent)}

.sec-head{max-width:680px;margin-bottom:60px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.16em;
  color:var(--brand-2);margin-bottom:16px;
}
.sec-head h2{font-size:clamp(30px,3.8vw,50px);margin-bottom:16px;letter-spacing:-.03em}
.sec-head p{color:var(--txt-2);font-size:17px}

/* ---------- 卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-l);
  padding:32px 30px;position:relative;overflow:hidden;
  transition:transform .38s var(--ease),border-color .38s,background .38s;
}
.card::before{
  content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(420px 200px at var(--mx,50%) 0%,rgba(61,123,255,.13),transparent 70%);
  opacity:0;transition:opacity .38s;
}
.card:hover{transform:translateY(-6px);border-color:var(--line-2);background:var(--panel-2)}
.card:hover::before{opacity:1}

.card-ico{
  width:50px;height:50px;border-radius:14px;display:grid;place-items:center;margin-bottom:22px;
  background:linear-gradient(135deg,rgba(61,123,255,.20),rgba(94,234,212,.13));
  border:1px solid rgba(61,123,255,.26);
}
.card-ico svg{width:24px;height:24px;fill:none;stroke:var(--brand-2);stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:20px;margin-bottom:12px}
.card p{color:var(--txt-2);font-size:15px;margin-bottom:20px;line-height:1.72}

.tags{display:flex;flex-wrap:wrap;gap:7px}
.tags li{
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:rgba(255,255,255,.045);border:1px solid var(--line);color:var(--txt-3);
}

/* ---------- 技术栈 ---------- */
.stack-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:34px}
.stack-col h4{font-size:15px;margin-bottom:18px;color:var(--txt);
  padding-bottom:12px;border-bottom:1px solid var(--line)}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{
  font-size:13.5px;padding:8px 15px;border-radius:10px;
  background:var(--panel);border:1px solid var(--line);color:var(--txt-2);
  transition:.26s var(--ease);
}
.chips span:hover{border-color:rgba(61,123,255,.45);color:var(--txt);transform:translateY(-2px)}

/* ---------- 团队 ---------- */
.team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.member{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;transition:.38s var(--ease);
}
.member:hover{transform:translateY(-6px);border-color:var(--line-2);background:var(--panel-2)}
.member-photo{height:300px;overflow:hidden;background:var(--bg-3);position:relative}
.member-photo::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(0deg,rgba(11,16,29,.85) 0%,transparent 42%);
}
.member-photo img{
  width:100%;height:100%;object-fit:cover;object-position:50% 18%;
  filter:saturate(.82) contrast(1.04);
  transition:transform .7s var(--ease),filter .5s;
}
.member:hover .member-photo img{transform:scale(1.05);filter:saturate(1) contrast(1.06)}
.member-body{padding:24px 26px 30px;margin-top:-46px;position:relative;z-index:2}
.member-body h3{font-size:19px;margin-bottom:6px}
.member-role{
  font-size:12.5px;font-weight:600;letter-spacing:.03em;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px;
}
.member-bio{font-size:14px;color:var(--txt-2);line-height:1.7}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;counter-reset:s}
.step{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 28px;position:relative;transition:.35s var(--ease);
}
.step:hover{border-color:rgba(61,123,255,.4);transform:translateY(-4px);background:var(--panel-2)}
.step-no{
  display:block;font-size:13px;font-weight:800;letter-spacing:.1em;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:14px;
}
.step h4{font-size:19px;margin-bottom:11px}
.step p{color:var(--txt-2);font-size:14.5px;line-height:1.72}

/* ---------- 案例 ---------- */
.works{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.work{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;transition:.38s var(--ease);
}
.work:hover{transform:translateY(-6px);border-color:var(--line-2)}
.work-media{height:200px;overflow:hidden;background:var(--bg-3)}
.work-media img{width:100%;height:100%;object-fit:cover;
  filter:saturate(.7) brightness(.8);transition:transform .7s var(--ease),filter .5s}
.work:hover .work-media img{transform:scale(1.06);filter:saturate(1) brightness(.95)}
.work-body{padding:26px 26px 28px}
.work-tag{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.06em;
  color:var(--brand-2);background:rgba(94,234,212,.10);
  border:1px solid rgba(94,234,212,.24);padding:4px 11px;border-radius:999px;margin-bottom:14px;
}
.work h3{font-size:19px;margin-bottom:11px}
.work p{color:var(--txt-2);font-size:14.5px;margin-bottom:18px;line-height:1.72}

.work-feature{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr;align-items:center}
.work-feature .work-media{height:100%;min-height:280px}
.work-feature .work-body{padding:42px 38px}

/* ---------- CTA ---------- */
.cta-box{
  position:relative;border-radius:34px;overflow:hidden;
  border:1px solid var(--line-2);min-height:400px;display:grid;align-items:center;
  box-shadow:var(--shadow);
}
.cta-media{position:absolute;inset:0}
.cta-media img{width:100%;height:100%;object-fit:cover;object-position:70% 30%;
  filter:saturate(.6) brightness(.42)}
.cta-body{position:relative;z-index:2;padding:60px;max-width:640px}
.cta-body h2{font-size:clamp(28px,3.4vw,46px);margin-bottom:18px}
.cta-body p{color:#c3cbdb;font-size:17px;margin-bottom:32px}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:70px;align-items:start}
.contact-left h2{font-size:clamp(28px,3.4vw,44px);margin-bottom:16px}
.contact-left > p{color:var(--txt-2);font-size:16.5px;margin-bottom:40px}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-info li{display:flex;align-items:flex-start;gap:15px}
.ci-ico{
  width:42px;height:42px;border-radius:12px;flex:none;display:grid;place-items:center;
  background:var(--panel);border:1px solid var(--line);
}
.ci-ico svg{width:19px;height:19px;fill:none;stroke:var(--brand-2);stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.contact-info small{display:block;font-size:12.5px;color:var(--txt-3);margin-bottom:3px}
.contact-info b{font-weight:600;font-size:15px}

.contact-form{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-l);
  padding:34px;backdrop-filter:blur(12px);
}
.field{margin-bottom:18px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field label{display:block;font-size:13px;color:var(--txt-3);margin-bottom:8px;font-weight:500}
.field label .opt{font-style:normal;opacity:.6;margin-left:5px}
.field-hint{display:block;font-size:12.5px;color:var(--txt-3);margin-top:7px;opacity:.85}
.field input,.field select,.field textarea{
  width:100%;background:rgba(0,0,0,.28);border:1px solid var(--line);
  border-radius:11px;padding:12px 15px;font-size:14.5px;outline:none;
  transition:border-color .24s,background .24s;resize:vertical;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(61,123,255,.6);background:rgba(0,0,0,.42);
  box-shadow:0 0 0 3px rgba(61,123,255,.13);
}
.field select{cursor:pointer;appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b768c' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 13px center;background-size:16px;padding-right:40px}
.field select option{background:#0b101d;color:var(--txt)}

.form-msg{margin-top:14px;font-size:14px;min-height:20px;text-align:center}
.form-msg.ok{color:#34d399}
.form-msg.err{color:#f87171}

/* ---------- footer ---------- */
.footer{position:relative;z-index:1;border-top:1px solid var(--line);padding:40px 0;margin-top:40px}
.footer-inner{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:17px}
.foot-copy{font-size:13.5px;color:var(--txt-3);margin-left:auto}
.foot-links{display:flex;gap:22px}
.foot-links a{font-size:13.5px;color:var(--txt-3);transition:color .22s}
.foot-links a:hover{color:var(--txt)}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .work-feature{grid-column:span 1;grid-template-columns:1fr}
  .work-feature .work-media{min-height:220px}
}
@media (max-width:820px){
  .burger{display:grid}
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;gap:0;
    background:rgba(7,10,18,.97);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);padding:8px 28px 20px;
    max-height:0;overflow:hidden;transition:max-height .4s var(--ease);
  }
  .nav-links.open{max-height:340px}
  .nav-links a{padding:14px 0;font-size:16px;border-bottom:1px solid rgba(255,255,255,.05)}
  .nav-links a::after{display:none}
  .nav-right .btn{display:none}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 50px)}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px}
  .section{padding:76px 0}
  .cta-body{padding:38px 26px}
  .wrap,.nav-inner{padding:0 20px}
  .hero-scroll{display:none}
}
@media (max-width:520px){
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .field-row{grid-template-columns:1fr}
  .contact-form{padding:24px 20px}
  .foot-copy{margin-left:0;width:100%;order:3}
}