/* ============================================================
   NEO Design System — 深空科技风 (Aurora Tech)
   非响应式 · 固定 1200px 容器 · 仅桌面端
   ============================================================ */

:root{
  --nx-bg-dark:#05070F;
  --nx-bg-dark2:#0B1120;
  --nx-primary:#4E7CFF;
  --nx-primary2:#8B5CF6;
  --nx-accent:#22D3EE;
  --nx-grad:linear-gradient(135deg,#4E7CFF 0%,#8B5CF6 52%,#22D3EE 100%);
  --nx-grad-soft:linear-gradient(135deg,rgba(78,124,255,.16),rgba(139,92,246,.16) 52%,rgba(34,211,238,.16));
  --nx-text:#0F172A;
  --nx-text-2:#475569;
  --nx-text-3:#94A3B8;
  --nx-line:#E6EAF2;
  --nx-light-bg:#F5F7FB;
  --nx-dark-text:#E7ECF7;
  --nx-dark-text-2:#9AA7C2;
  --nx-radius:14px;
  --nx-shadow:0 10px 40px -12px rgba(15,23,42,.14);
  --nx-shadow-lg:0 24px 60px -20px rgba(15,23,42,.28);
  --nx-header-h:76px;
}

/* ---------- Base ---------- */
*{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body.nx-body{
  min-width:1280px;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--nx-text);
  background:#fff;
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;transition:color .25s,opacity .25s;}
ul,ol{list-style:none;}
img{vertical-align:middle;border:0;}
input,select,textarea,button{font-family:inherit;font-size:inherit;outline:none;}
.nx-container{width:1200px;margin:0 auto;position:relative;}
.nx-clear{clear:both;}

::selection{background:rgba(78,124,255,.25);}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#0B1120;}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#4E7CFF,#8B5CF6);border-radius:8px;border:2px solid #0B1120;}

/* ---------- 通用组件 ---------- */
.nx-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 30px;border-radius:999px;border:0;cursor:pointer;
  font-size:16px;font-weight:600;letter-spacing:.5px;position:relative;overflow:hidden;
  transition:transform .3s cubic-bezier(.22,1,.36,1),box-shadow .3s,background .3s,color .3s;
  white-space:nowrap;
}
.nx-btn-primary{background:var(--nx-grad);background-size:180% 180%;color:#fff;box-shadow:0 10px 26px -8px rgba(78,124,255,.65);}
.nx-btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 36px -10px rgba(139,92,246,.7);background-position:100% 50%;}
.nx-btn-ghost{background:rgba(255,255,255,.06);color:#fff;border:1px solid rgba(255,255,255,.28);backdrop-filter:blur(6px);}
.nx-btn-ghost:hover{border-color:rgba(255,255,255,.65);background:rgba(255,255,255,.12);transform:translateY(-3px);}
.nx-btn-light{background:#fff;color:#1D2B4F;box-shadow:0 10px 26px -10px rgba(2,8,32,.45);}
.nx-btn-light:hover{transform:translateY(-3px);box-shadow:0 18px 38px -12px rgba(2,8,32,.5);}
.nx-btn-sm{height:40px;padding:0 22px;font-size:14px;}

.nx-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:34px;padding:0 16px;border-radius:999px;font-size:13px;letter-spacing:2px;
  color:#A9BBFF;background:rgba(78,124,255,.12);border:1px solid rgba(120,150,255,.32);
}
.nx-chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--nx-accent);box-shadow:0 0 10px var(--nx-accent);animation:nxPulse 2s infinite;}

/* 区块标题 */
.nx-sec-head{text-align:center;margin-bottom:56px;}
.nx-sec-tag{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:4px;
  background:var(--nx-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  text-transform:uppercase;margin-bottom:12px;
}
.nx-sec-title{font-size:38px;font-weight:800;color:var(--nx-text);letter-spacing:1px;line-height:1.35;}
.nx-sec-sub{font-size:15px;color:var(--nx-text-3);margin-top:14px;}
.nx-sec-line{width:56px;height:4px;border-radius:4px;background:var(--nx-grad);margin:20px auto 0;position:relative;overflow:hidden;}
.nx-sec-line::after{content:"";position:absolute;left:-100%;top:0;width:100%;height:100%;background:rgba(255,255,255,.7);animation:nxShine 2.6s ease-in-out infinite;}

/* ---------- 顶部导航（白色） ---------- */
.nx-header{
  position:fixed;top:0;left:0;right:0;z-index:999;min-width:1280px;
  height:var(--nx-header-h);
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--nx-line);
  transition:background .35s,box-shadow .35s,height .35s;
}
.nx-header.is-solid{background:rgba(255,255,255,.97);box-shadow:0 12px 32px -14px rgba(15,23,42,.18);}
.nx-header .nx-container{display:flex;align-items:center;height:var(--nx-header-h);}

.nx-logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nx-logo img{height:42px;}
.nx-logo-name{font-size:19px;font-weight:700;color:var(--nx-text);letter-spacing:.5px;white-space:nowrap;}
.nx-logo-name em{font-style:normal;background:var(--nx-grad);-webkit-background-clip:text;background-clip:text;color:transparent;}

.nx-nav{display:flex;align-items:center;margin-left:56px;gap:6px;flex:1;}
.nx-nav a{
  position:relative;display:block;padding:0 18px;height:var(--nx-header-h);line-height:var(--nx-header-h);
  color:#3D4A63;font-size:15.5px;font-weight:500;letter-spacing:1px;
}
.nx-nav a::after{
  content:"";position:absolute;left:50%;bottom:14px;width:0;height:3px;border-radius:3px;
  background:var(--nx-grad);transform:translateX(-50%);transition:width .32s cubic-bezier(.22,1,.36,1);
}
.nx-nav a:hover,.nx-nav a.is-active{color:var(--nx-primary);}
.nx-nav a:hover::after,.nx-nav a.is-active::after{width:26px;}

.nx-header-acts{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nx-header-acts .nx-login-link{color:#3D4A63;font-size:14.5px;padding:8px 4px;}
.nx-header-acts .nx-login-link:hover{color:var(--nx-primary);}

/* ---------- 页脚 ---------- */
.nx-footer{background:var(--nx-bg-dark);color:var(--nx-dark-text-2);position:relative;overflow:hidden;min-width:1280px;}
.nx-footer::before{
  content:"";position:absolute;top:-220px;left:50%;transform:translateX(-50%);
  width:900px;height:340px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(78,124,255,.22),transparent 70%);
  filter:blur(30px);pointer-events:none;
}
.nx-footer-grid{display:flex;justify-content:space-between;padding:64px 0 48px;position:relative;}
.nx-footer-brand{width:380px;}
.nx-footer-brand .nx-logo{margin-bottom:20px;}
.nx-footer-brand .nx-logo img{background:#fff;border-radius:10px;padding:3px;}
.nx-footer-brand .nx-logo-name{color:#fff;}
.nx-footer-brand p{font-size:13.5px;line-height:1.9;color:#7A88A8;}
.nx-footer-col h4{font-size:15px;color:#DDE5F5;font-weight:600;letter-spacing:2px;margin-bottom:20px;position:relative;padding-bottom:12px;}
.nx-footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--nx-grad);border-radius:2px;}
.nx-footer-col ul li{margin-bottom:12px;font-size:13.5px;}
.nx-footer-col ul a{color:#7A88A8;transition:color .25s,padding-left .25s;}
.nx-footer-col ul a:hover{color:#fff;padding-left:6px;}
.nx-footer-bar{
  border-top:1px solid rgba(255,255,255,.07);
  padding:22px 0;text-align:center;font-size:12.5px;color:#5D6B8C;letter-spacing:1px;
}
.nx-footer-bar a{color:#8FA0C6;}
.nx-footer-bar a:hover{color:#fff;}

/* ---------- 回到顶部 ---------- */
.nx-top{
  position:fixed;right:36px;bottom:44px;z-index:998;width:52px;height:52px;border-radius:50%;
  background:var(--nx-grad);background-size:200% 200%;color:#fff;border:0;cursor:pointer;
  box-shadow:0 12px 30px -8px rgba(78,124,255,.7);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(16px);
  transition:all .4s cubic-bezier(.22,1,.36,1);
}
.nx-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.nx-top:hover{background-position:100% 50%;transform:translateY(-4px);}

/* ============================================================
   首页 HERO
   ============================================================ */
.nx-hero{
  position:relative;min-width:1280px;height:640px;overflow:hidden;
  background:radial-gradient(1200px 600px at 75% -10%,#141E44 0%,transparent 60%),
             radial-gradient(900px 500px at 12% 110%,#122046 0%,transparent 55%),
             linear-gradient(160deg,#05070F 0%,#0A1024 55%,#070B1A 100%);
  display:flex;align-items:center;
}
.nx-hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,150,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,150,255,.07) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 75% 65% at 50% 40%,#000 30%,transparent 75%);
          mask-image:radial-gradient(ellipse 75% 65% at 50% 40%,#000 30%,transparent 75%);
}
.nx-blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;pointer-events:none;will-change:transform;}
.nx-blob-1{width:520px;height:520px;background:#2C4BDF;top:-160px;right:-60px;animation:nxFloat1 14s ease-in-out infinite;}
.nx-blob-2{width:420px;height:420px;background:#7A3BEC;bottom:-190px;left:6%;animation:nxFloat2 17s ease-in-out infinite;}
.nx-blob-3{width:260px;height:260px;background:#0E9DB8;top:30%;left:38%;opacity:.35;animation:nxFloat3 12s ease-in-out infinite;}
.nx-hero-stars{position:absolute;inset:0;pointer-events:none;}
.nx-hero-stars i{
  position:absolute;width:3px;height:3px;border-radius:50%;background:#C7D6FF;opacity:.7;
  animation:nxTwinkle 3.4s ease-in-out infinite;
}

.nx-hero-inner{position:relative;z-index:2;text-align:center;width:1200px;margin:0 auto;}
.nx-hero h1{
  font-size:58px;line-height:1.28;color:#fff;font-weight:800;letter-spacing:3px;
  margin:26px 0 22px;
}
.nx-hero h1 .nx-grad-text{
  background:linear-gradient(100deg,#6D9BFF 0%,#A78BFA 45%,#3AE0F0 100%);
  background-size:220% 220%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:nxGradMove 6s ease infinite;
}
.nx-hero-desc{font-size:17px;color:var(--nx-dark-text-2);letter-spacing:2px;max-width:760px;margin:0 auto 42px;}
.nx-hero-cta{display:flex;justify-content:center;gap:18px;}
.nx-hero-feats{display:flex;justify-content:center;gap:14px;margin-top:52px;}
.nx-hero-feats span{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 20px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  color:#B9C6E4;font-size:13.5px;letter-spacing:1px;backdrop-filter:blur(4px);
}
.nx-hero-feats span svg{flex-shrink:0;}
.nx-hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:2;
  width:26px;height:42px;border:2px solid rgba(255,255,255,.35);border-radius:16px;
}
.nx-hero-scroll::after{
  content:"";position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:4px;
  background:#fff;animation:nxScrollHint 1.8s ease-in-out infinite;
}

/* Hero 进场动画 */
.nx-hero .nx-in{opacity:0;transform:translateY(28px);animation:nxHeroIn .9s cubic-bezier(.22,1,.36,1) forwards;}
.nx-hero .nx-d1{animation-delay:.1s;}
.nx-hero .nx-d2{animation-delay:.25s;}
.nx-hero .nx-d3{animation-delay:.4s;}
.nx-hero .nx-d4{animation-delay:.55s;}
.nx-hero .nx-d5{animation-delay:.7s;}

/* ---------- 服务分类卡片 ---------- */
.nx-cats{padding:96px 0 90px;background:#fff;position:relative;}
.nx-cats-grid{display:flex;gap:24px;}
.nx-cat-card{
  position:relative;flex:1;padding:44px 30px 38px;border-radius:var(--nx-radius);
  background:#FBFCFF;border:1px solid var(--nx-line);
  transition:transform .45s cubic-bezier(.22,1,.36,1),box-shadow .45s,border-color .45s;
  overflow:hidden;
}
.nx-cat-card::before{
  content:"";position:absolute;inset:0;border-radius:var(--nx-radius);padding:1px;
  background:var(--nx-grad);background-size:200% 200%;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:0;transition:opacity .45s;pointer-events:none;
}
.nx-cat-card::after{
  content:"";position:absolute;top:-70px;right:-70px;width:170px;height:170px;border-radius:50%;
  background:var(--nx-grad-soft);filter:blur(6px);opacity:0;transform:scale(.4);
  transition:all .55s cubic-bezier(.22,1,.36,1);
}
.nx-cat-card:hover{transform:translateY(-10px);box-shadow:var(--nx-shadow-lg);border-color:transparent;}
.nx-cat-card:hover::before{opacity:1;}
.nx-cat-card:hover::after{opacity:1;transform:scale(1);}
.nx-cat-ico{
  width:74px;height:74px;border-radius:20px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(78,124,255,.12),rgba(139,92,246,.12));
  margin-bottom:26px;position:relative;z-index:1;
  transition:transform .45s cubic-bezier(.34,1.56,.64,1);
}
.nx-cat-card:hover .nx-cat-ico{transform:translateY(-6px) rotate(-6deg) scale(1.06);}
.nx-cat-card h3{font-size:19px;font-weight:700;margin-bottom:12px;letter-spacing:1px;position:relative;z-index:1;}
.nx-cat-card p{font-size:13.5px;color:var(--nx-text-3);line-height:1.9;position:relative;z-index:1;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;}
.nx-cat-more{
  margin-top:22px;display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;
  background:linear-gradient(100deg,#4E7CFF,#8B5CF6);-webkit-background-clip:text;background-clip:text;color:transparent;
  position:relative;z-index:1;
}
.nx-cat-more i{font-style:normal;transition:transform .3s;}
.nx-cat-card:hover .nx-cat-more i{transform:translateX(5px);}

/* ---------- 精选案例 Tabs ---------- */
.nx-cases{padding:90px 0;background:var(--nx-light-bg);position:relative;overflow:hidden;}
.nx-cases::before{
  content:"CASES";position:absolute;top:46px;left:50%;transform:translateX(-50%);
  font-size:110px;font-weight:900;letter-spacing:24px;color:rgba(15,23,42,.03);
  pointer-events:none;white-space:nowrap;
}
input[name="nx-cases"]{display:none;}
input[name="nx-cases"] + label{
  position:relative;display:inline-flex;align-items:center;height:46px;padding:0 34px;border-radius:999px;
  font-size:15.5px;font-weight:600;letter-spacing:1px;color:var(--nx-text-2);cursor:pointer;
  border:1px solid transparent;transition:all .35s;user-select:none;margin-right:10px;
}
input[name="nx-cases"] + label:hover{color:var(--nx-primary);}
input[name="nx-cases"]:checked + label{
  color:#fff;background:var(--nx-grad);background-size:170% 170%;
  box-shadow:0 10px 24px -8px rgba(78,124,255,.55);
}
.nx-tab-panel{display:none;animation:nxFadeUp .6s cubic-bezier(.22,1,.36,1);}
#nx-tab1:checked ~ .nx-tab-wrap #nx-p1,
#nx-tab2:checked ~ .nx-tab-wrap #nx-p2,
#nx-tab3:checked ~ .nx-tab-wrap #nx-p3{display:block;}

.nx-case-grid{display:flex;flex-wrap:wrap;gap:24px;}
.nx-case-card{
  width:384px;border-radius:var(--nx-radius);overflow:hidden;background:#fff;
  box-shadow:0 6px 24px -10px rgba(15,23,42,.10);
  transition:transform .45s cubic-bezier(.22,1,.36,1),box-shadow .45s;
}
.nx-case-card:hover{transform:translateY(-8px);box-shadow:var(--nx-shadow-lg);}
.nx-case-thumb{height:224px;overflow:hidden;position:relative;}
.nx-case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.22,1,.36,1);}
.nx-case-card:hover .nx-case-thumb img{transform:scale(1.08);}
.nx-case-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(5,8,20,.42));
  opacity:0;transition:opacity .45s;
}
.nx-case-card:hover .nx-case-thumb::after{opacity:1;}
.nx-case-body{padding:22px 24px 26px;}
.nx-case-body h3{
  font-size:17px;font-weight:700;margin-bottom:10px;letter-spacing:.5px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.nx-case-body h3 a:hover{color:var(--nx-primary);}
.nx-case-body p{
  font-size:13.5px;color:var(--nx-text-3);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.nx-case-empty{
  width:100%;text-align:center;padding:80px 0;color:var(--nx-text-3);font-size:15px;letter-spacing:2px;
}

/* ---------- 服务流程 ---------- */
.nx-flow{padding:96px 0;background:#fff;}
.nx-flow-track{display:flex;gap:0;position:relative;}
.nx-flow-track::before{
  content:"";position:absolute;top:37px;left:12%;right:12%;height:2px;
  background:repeating-linear-gradient(90deg,var(--nx-line) 0 10px,transparent 10px 20px);
}
.nx-step{flex:1;text-align:center;position:relative;padding:0 20px;}
.nx-step-num{
  width:74px;height:74px;margin:0 auto 24px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:#fff;border:2px solid var(--nx-line);font-size:24px;font-weight:800;color:var(--nx-text-3);
  position:relative;z-index:1;transition:all .5s cubic-bezier(.22,1,.36,1);
}
.nx-step:hover .nx-step-num{
  border-color:transparent;color:#fff;background:var(--nx-grad);background-size:180% 180%;
  transform:translateY(-8px) scale(1.06);box-shadow:0 16px 34px -10px rgba(78,124,255,.6);
}
.nx-step h4{font-size:18px;font-weight:700;margin-bottom:10px;letter-spacing:1px;}
.nx-step p{font-size:13.5px;color:var(--nx-text-3);line-height:1.85;}

/* ---------- CTA 横幅 ---------- */
.nx-cta{padding:0 0 96px;background:#fff;}
.nx-cta-band{
  position:relative;border-radius:24px;overflow:hidden;padding:70px 80px;
  background:linear-gradient(120deg,#101A3C 0%,#1B2C66 48%,#123B63 100%);
  display:flex;align-items:center;justify-content:space-between;
}
.nx-cta-band::before{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(120,150,255,.5),transparent 72%);
  top:-200px;right:-90px;filter:blur(20px);animation:nxFloat2 12s ease-in-out infinite;
}
.nx-cta-band::after{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(34,211,238,.35),transparent 70%);
  bottom:-160px;left:-60px;filter:blur(18px);animation:nxFloat1 15s ease-in-out infinite;
}
.nx-cta-band h2{font-size:32px;color:#fff;font-weight:800;letter-spacing:2px;margin-bottom:12px;position:relative;z-index:1;}
.nx-cta-band p{font-size:15px;color:#A8B8DF;letter-spacing:1px;position:relative;z-index:1;}
.nx-cta-band .nx-btn{position:relative;z-index:1;}

/* ============================================================
   动画 Keyframes
   ============================================================ */
@keyframes nxHeroIn{to{opacity:1;transform:translateY(0);}}
@keyframes nxGradMove{0%,100%{background-position:0% 50%;}50%{background-position:100% 50%;}}
@keyframes nxShine{0%{left:-100%;}60%,100%{left:120%;}}
@keyframes nxPulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.45;transform:scale(.75);}}
@keyframes nxFloat1{0%,100%{transform:translate(0,0) scale(1);}33%{transform:translate(-46px,36px) scale(1.08);}66%{transform:translate(28px,-24px) scale(.95);}}
@keyframes nxFloat2{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(52px,-38px) scale(1.1);}}
@keyframes nxFloat3{0%,100%{transform:translate(0,0);}50%{transform:translate(-40px,30px);}}
@keyframes nxTwinkle{0%,100%{opacity:.15;transform:scale(.7);}50%{opacity:.85;transform:scale(1.15);}}
@keyframes nxScrollHint{0%{transform:translateY(0);opacity:1;}70%{transform:translateY(14px);opacity:0;}100%{transform:translateY(0);opacity:0;}}
@keyframes nxFadeUp{from{opacity:0;transform:translateY(22px);}to{opacity:1;transform:translateY(0);}}

/* 滚动显现 */
.nx-reveal{opacity:0;transform:translateY(38px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1);}
.nx-reveal.is-in{opacity:1;transform:translateY(0);}
.nx-reveal[data-delay="1"]{transition-delay:.12s;}
.nx-reveal[data-delay="2"]{transition-delay:.24s;}
.nx-reveal[data-delay="3"]{transition-delay:.36s;}
.nx-reveal[data-delay="4"]{transition-delay:.48s;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;}
  .nx-reveal{opacity:1;transform:none;}
}