/* ============================================================
   天奇星 TECKSIN · Trae暗色风格企业官网
   配色：#0a0a0a / #111111 / #1f1f1f / #3ddc84 / #7c5cff
   ============================================================ */
:root{
  --bg:#0a0a0a;
  --panel:#111111;
  --panel-2:#161616;
  --line:#1f1f1f;
  --green:#3ddc84;
  --purple:#7c5cff;
  --text:#e6e8ee;
  --text-dim:#9aa0ab;
  --radius:16px;
  --grad:linear-gradient(120deg,#3ddc84,#7c5cff);
}
@property --angle{syntax:'<angle>';initial-value:0deg;inherits:false;}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","HarmonyOS Sans SC",system-ui,-apple-system,sans-serif;
  line-height:1.7;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
img,svg{display:block;max-width:100%;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 鼠标跟随光晕 ---------- */
.cursor-glow{
  position:fixed;left:0;top:0;width:480px;height:480px;z-index:1;pointer-events:none;
  background:radial-gradient(circle,rgba(61,220,132,.07) 0%,rgba(124,92,255,.05) 35%,transparent 70%);
  transform:translate(-50%,-50%);transition:opacity .4s;opacity:0;
}
@media(hover:hover) and (min-width:769px){ .cursor-glow{opacity:1;} }

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .35s,box-shadow .35s,border-color .35s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(10,10,10,.78);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-logo{width:38px;height:38px;filter:drop-shadow(0 0 8px rgba(61,220,132,.45));}
.brand-name{font-size:20px;font-weight:700;letter-spacing:1px;}
.brand-name i{font-style:normal;font-size:11px;color:var(--text-dim);margin-left:6px;letter-spacing:3px;vertical-align:2px;}
.menu{display:flex;align-items:center;gap:30px;}
.menu-link{font-size:14px;color:var(--text-dim);position:relative;padding:6px 0;transition:color .25s;}
.menu-link::after{
  content:'';position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;
  background:var(--grad);transition:width .3s;
}
.menu-link:hover,.menu-link.active{color:var(--text);}
.menu-link:hover::after,.menu-link.active::after{width:100%;}

/* 汉堡按钮 */
.hamburger{display:none;width:40px;height:40px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:6px;}
.hamburger span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s,opacity .3s;}
.hamburger.open span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 34px;border-radius:999px;font-size:15px;font-weight:600;
  cursor:pointer;border:none;transition:transform .25s,box-shadow .25s,background .25s;
  position:relative;z-index:2;white-space:nowrap;
}
.btn-glow{background:var(--grad);color:#06130b;box-shadow:0 0 18px rgba(61,220,132,.35),0 0 34px rgba(124,92,255,.18);}
.btn-glow:hover{transform:translateY(-2px);box-shadow:0 0 26px rgba(61,220,132,.55),0 0 50px rgba(124,92,255,.3);}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--text);border:1px solid #2a2a2a;}
.btn-ghost:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px);}
.btn-sm{padding:9px 22px;font-size:13px;}
.btn-block{width:100%;}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;overflow:hidden;
  padding:120px 24px 80px;
}
#starfield{position:absolute;inset:0;width:100%;height:100%;z-index:0;}
.nebula{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;pointer-events:none;z-index:0;animation:drift 14s ease-in-out infinite alternate;}
.nebula-a{width:520px;height:520px;background:rgba(124,92,255,.16);top:-8%;left:-6%;}
.nebula-b{width:460px;height:460px;background:rgba(61,220,132,.12);bottom:-6%;right:-4%;animation-delay:-7s;}
@keyframes drift{from{transform:translate(0,0) scale(1);}to{transform:translate(40px,26px) scale(1.12);}}
.hero-content{position:relative;z-index:2;max-width:860px;}
.hero-tagline{font-size:14px;letter-spacing:4px;color:var(--text-dim);margin-bottom:22px;}
.hero-title{
  font-size:clamp(64px,12vw,128px);font-weight:800;letter-spacing:6px;line-height:1.15;
  background:linear-gradient(110deg,#3ddc84 15%,#e6e8ee 38%,#7c5cff 62%,#3ddc84 85%);
  background-size:220% auto;-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  animation:shine 6s linear infinite;
  filter:drop-shadow(0 0 30px rgba(61,220,132,.25));
}
@keyframes shine{to{background-position:220% center;}}
.hero-slogan{font-size:clamp(20px,3.4vw,30px);font-weight:600;margin-top:18px;letter-spacing:2px;}
.hero-slogan .hl{color:var(--green);text-shadow:0 0 18px rgba(61,220,132,.6);}
.hero-slogan .hl:last-child{color:var(--purple);text-shadow:0 0 18px rgba(124,92,255,.6);}
.hero-desc{color:var(--text-dim);margin-top:14px;font-size:15px;letter-spacing:1px;}
.hero-actions{margin-top:44px;display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;}
.scroll-hint span{
  display:block;width:24px;height:40px;border:2px solid rgba(255,255,255,.22);border-radius:14px;position:relative;
}
.scroll-hint span::before{
  content:'';position:absolute;left:50%;top:7px;width:4px;height:8px;margin-left:-2px;border-radius:2px;
  background:var(--green);animation:hint 1.6s ease-in-out infinite;
}
@keyframes hint{0%{transform:translateY(0);opacity:1;}70%{transform:translateY(14px);opacity:0;}100%{opacity:0;}}

/* ---------- 数字条 ---------- */
.stats{padding:70px 0 30px;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 16px;text-align:center;transition:border-color .3s,transform .3s;
}
.stat:hover{border-color:rgba(61,220,132,.4);transform:translateY(-4px);}
.stat b{display:block;font-size:40px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}
.stat span{font-size:13px;color:var(--text-dim);letter-spacing:1px;}

/* ---------- 通用Section ---------- */
.section{padding:110px 0;position:relative;}
.section-alt{background:linear-gradient(180deg,#0d0d0f 0%,#0a0a0a 100%);}
.section-head{text-align:center;margin-bottom:64px;}
.section-eyebrow{font-size:12px;letter-spacing:6px;color:var(--green);opacity:.85;margin-bottom:12px;}
.section-title{font-size:clamp(28px,4.6vw,42px);font-weight:800;letter-spacing:2px;}
.section-sub{color:var(--text-dim);margin-top:12px;font-size:15px;}

/* ---------- 业务卡片（流光边框） ---------- */
.cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.card{
  position:relative;background:var(--panel);border-radius:var(--radius);
  padding:30px 24px 26px;overflow:hidden;isolation:isolate;
  transition:transform .35s,box-shadow .35s;
}
.card::before{
  content:'';position:absolute;inset:-1px;z-index:-1;border-radius:inherit;
  background:conic-gradient(from var(--angle),transparent 0 72%,var(--green) 84%,var(--purple) 93%,transparent 100%);
  animation:rotate-angle 5s linear infinite;opacity:0;transition:opacity .4s;
}
.card::after{
  content:'';position:absolute;inset:1px;z-index:-1;border-radius:14px;background:var(--panel);
}
.card:hover{transform:translateY(-8px);box-shadow:0 18px 44px rgba(0,0,0,.6);}
.card:hover::before{opacity:1;}
@keyframes rotate-angle{to{--angle:360deg;}}
.card-icon{
  width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(61,220,132,.12),rgba(124,92,255,.12));
  border:1px solid rgba(61,220,132,.25);margin-bottom:20px;
}
.card-icon svg{width:28px;height:28px;color:var(--green);}
.card:hover .card-icon{box-shadow:0 0 20px rgba(61,220,132,.3);}
.card h3{font-size:18px;margin-bottom:10px;letter-spacing:1px;}
.card p{font-size:13.5px;color:var(--text-dim);}

/* ---------- 流程轨道 ---------- */
.orbit-track{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:20px;}
.orbit-line{
  position:absolute;top:34px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(61,220,132,.5),rgba(124,92,255,.5),transparent);
}
.step{text-align:center;position:relative;padding-top:70px;}
.step i{
  font-style:normal;position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:68px;height:68px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--panel-2);border:1px solid var(--line);font-weight:700;font-size:18px;
  color:var(--green);box-shadow:0 0 0 6px rgba(61,220,132,.05);transition:box-shadow .3s,transform .3s;
}
.step:hover i{box-shadow:0 0 22px rgba(61,220,132,.4);transform:translateX(-50%) scale(1.08);}
.step b{display:block;font-size:17px;margin-bottom:6px;letter-spacing:1px;}
.step p{font-size:12.5px;color:var(--text-dim);}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.case-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .35s,border-color .35s,box-shadow .35s;
}
.case-card:hover{transform:translateY(-6px);border-color:rgba(124,92,255,.45);box-shadow:0 16px 40px rgba(0,0,0,.55);}
.case-thumb{height:150px;display:flex;align-items:center;justify-content:center;}
.case-thumb span{font-size:34px;font-weight:800;letter-spacing:3px;color:rgba(255,255,255,.85);text-shadow:0 4px 20px rgba(0,0,0,.4);}
.case-thumb-a{background:linear-gradient(135deg,#0e2b1c,#123a4a);}
.case-thumb-b{background:linear-gradient(135deg,#2a1233,#3a1a2e);}
.case-thumb-c{background:linear-gradient(135deg,#0e2233,#123a30);}
.case-thumb-d{background:linear-gradient(135deg,#332a0e,#2e1a3a);}
.case-info{padding:18px 18px 20px;}
.case-info b{display:block;font-size:16px;margin-bottom:6px;}
.case-info span{font-size:12.5px;color:var(--text-dim);}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center;}
.about-text p{color:var(--text-dim);margin-bottom:16px;font-size:15px;}
.about-text strong{color:var(--green);font-weight:600;}
.about-points{list-style:none;margin-top:8px;}
.about-points li{
  position:relative;padding-left:26px;margin-bottom:12px;font-size:14.5px;color:var(--text);
}
.about-points li::before{
  content:'✦';position:absolute;left:0;top:0;color:var(--purple);font-size:13px;
}
.about-visual{display:flex;justify-content:center;}
.orbit-svg{width:min(360px,80vw);filter:drop-shadow(0 0 30px rgba(61,220,132,.18));}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:start;}
.contact-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;margin-bottom:16px;transition:border-color .3s,transform .3s;
}
.contact-item:hover{border-color:rgba(61,220,132,.4);transform:translateX(4px);}
.contact-item b{display:block;font-size:13px;color:var(--green);letter-spacing:2px;margin-bottom:4px;}
.contact-item span{font-size:14.5px;color:var(--text-dim);}
.contact-form{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;background:var(--bg);border:1px solid #242424;border-radius:10px;
  padding:13px 16px;color:var(--text);font-size:14px;font-family:inherit;margin-bottom:14px;
  transition:border-color .25s,box-shadow .25s;resize:vertical;
}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(61,220,132,.12);
}
.contact-form select{color:var(--text-dim);}
.contact-form select option{background:var(--panel);color:var(--text);}
.contact-form ::placeholder{color:#5b6069;}
.form-tip{text-align:center;font-size:13px;color:var(--green);min-height:20px;margin-top:10px;}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);background:#080808;padding:50px 0 0;margin-top:40px;}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px;padding-bottom:36px;}
.footer-brand b{font-size:18px;letter-spacing:1px;}
.footer-brand b i{font-style:normal;font-size:11px;color:var(--text-dim);margin-left:6px;letter-spacing:3px;}
.footer-brand p{font-size:13px;color:var(--text-dim);margin-top:4px;}
.footer-links{display:flex;gap:26px;flex-wrap:wrap;}
.footer-links a{font-size:13px;color:var(--text-dim);transition:color .25s;}
.footer-links a:hover{color:var(--green);}
.copyright{
  border-top:1px solid var(--line);text-align:center;padding:18px 24px;
  font-size:12px;color:#5b6069;letter-spacing:1px;
}

/* ---------- 滚动渐入 ---------- */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ============================================================
   响应式
   ============================================================ */
@media(max-width:1199px){
  .cards-grid{grid-template-columns:repeat(3,1fr);}
  .case-grid{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .orbit-track{grid-template-columns:repeat(3,1fr);row-gap:40px;}
  .orbit-line{display:none;}
  .about-grid{grid-template-columns:1fr;gap:40px;}
  .contact-grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  /* 导航折叠 */
  .hamburger{display:flex;}
  .menu{
    position:fixed;top:68px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(10,10,10,.96);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .4s ease;
  }
  .menu.open{max-height:420px;}
  .menu-link{width:100%;text-align:center;padding:16px 0;font-size:15px;}
  .menu .btn{margin:12px 24px 18px;}
  .nav-inner{height:62px;}
  .menu{top:62px;}

  .cards-grid{grid-template-columns:1fr 1fr;gap:14px;}
  .card{padding:22px 16px 20px;}
  .card-icon{width:46px;height:46px;margin-bottom:14px;}
  .card p{font-size:12.5px;}

  .orbit-track{grid-template-columns:repeat(2,1fr);}
  .case-grid{grid-template-columns:1fr;}
  .case-thumb{height:130px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:12px;}
  .stat b{font-size:30px;}
  .stat{padding:22px 10px;}

  .section{padding:80px 0;}
  .hero{padding-top:100px;}
  .hero-actions .btn{flex:1;min-width:150px;}
  .form-row{grid-template-columns:1fr;}
  .footer-inner{flex-direction:column;text-align:center;justify-content:center;}
  .nebula{filter:blur(70px);}
}
@media(max-width:380px){
  .cards-grid{grid-template-columns:1fr;}
  .orbit-track{grid-template-columns:1fr;}
}
/* 尊重系统减弱动态偏好 */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}