:root{
  --bg:#0e0e13; --panel:#14141c; --panel-2:#191924;
  --ink:#eae7f2; --muted:#9a97ad; --dim:#5d5a72;
  --line:rgba(255,255,255,.09); --line-2:rgba(255,255,255,.16);
  --green:#8aff80; --amber:#ffd166; --pink:#ff6b9d; --blue:#7c9cff;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--mono);background:var(--bg);color:var(--ink);
  line-height:1.75;overflow-x:hidden;min-height:100vh;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--green);color:#0e0e13}

/* ---------- background layers ---------- */
#mesh{position:fixed;inset:0;z-index:0;pointer-events:none}
.grid-overlay{
  position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(75% 60% at 50% 0%,#000 10%,transparent 90%);
  mask-image:radial-gradient(75% 60% at 50% 0%,#000 10%,transparent 90%);
}
.noise{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}
.container{position:relative;z-index:2;max-width:1020px;margin:0 auto;padding:0 26px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(14,14,19,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:700;letter-spacing:.4px;background:none;border:none;color:inherit}
.logo .prompt{color:var(--green)}
.logo .path{color:var(--dim)}
.logo .name{color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:26px;font-size:13.5px;color:var(--muted)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--green)}
.gh-btn{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#0e0e13;
  background:var(--green);padding:8px 16px;border-radius:8px;transition:.2s;
}
.gh-btn:hover{box-shadow:0 0 22px rgba(138,255,128,.45);transform:translateY(-1px)}

/* ---------- hero ---------- */
.hero{position:relative;padding:110px 0 96px}
.typed{min-height:92px;font-size:14.5px;color:var(--muted);margin-bottom:26px}
.site-brand{font-size:13px;letter-spacing:1.5px;color:var(--dim);margin-bottom:22px}
.site-brand a{color:var(--green);transition:.2s}
.site-brand a:hover{text-shadow:0 0 12px rgba(138,255,128,.55)}
.typed .p{color:var(--green)}
.typed .caret{display:inline-block;width:9px;height:17px;background:var(--green);margin-left:2px;vertical-align:-3px;animation:blink 1.05s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.hero h1{
  font-size:clamp(56px,10vw,104px);line-height:1.02;letter-spacing:-4px;font-weight:800;
  display:flex;align-items:baseline;gap:2px;
}
.hero h1 .c1{color:var(--ink)}
.hero h1 .c2{background:linear-gradient(92deg,var(--green) 10%,var(--amber) 70%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .under{
  display:inline-block;width:.55em;height:.16em;border-radius:99px;
  background:linear-gradient(90deg,var(--green),var(--pink));margin-left:8px;
  animation:underscore 2.6s ease-in-out infinite;
}
@keyframes underscore{50%{transform:scaleX(.3);opacity:.5}}
.role{margin-top:20px;font-size:15px;color:var(--muted)}
.role b{color:var(--ink);font-weight:600}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-size:14px;font-weight:700;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--green);color:#0e0e13;box-shadow:0 10px 30px rgba(138,255,128,.18)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px rgba(138,255,128,.32)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}
.hero-tip{margin-top:30px;font-size:12.5px;color:var(--dim)}
.hero-tip kbd{
  font-family:var(--mono);font-size:12px;color:var(--green);
  border:1px solid var(--line-2);border-bottom-width:2px;border-radius:5px;padding:1px 7px;background:var(--panel);
}

/* ---------- 404 ---------- */
.hero.center{text-align:center}
.hero.center .hero-actions{justify-content:center}
.hero.center .site-brand{display:block;margin-bottom:18px}
.hero.center .typed{text-align:left;max-width:400px;margin:0 auto 26px}
.hero.center h1.err{font-size:clamp(96px,20vw,200px);justify-content:center}

/* ---------- marquee ---------- */
.marquee{overflow:hidden;border-block:1px solid var(--line);background:var(--panel);padding:13px 0}
.marquee-inner{display:inline-flex;white-space:nowrap;animation:marq 26s linear infinite;font-size:13px;letter-spacing:3px;color:var(--dim)}
.marquee-inner span{margin-right:56px}
.marquee-inner b{color:var(--green);font-weight:400}
@keyframes marq{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:92px 0;border-top:1px solid var(--line)}
.sec-head{margin-bottom:44px}
.kicker{font-size:12.5px;letter-spacing:2px;color:var(--green)}
.sec-head h2{font-size:clamp(28px,4vw,38px);letter-spacing:-1px;margin-top:8px;font-weight:800}
.sec-head p{color:var(--muted);font-size:14px;margin-top:10px;max-width:560px}

.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.about-left{min-width:0}
.about-text{font-size:15px;color:var(--muted)}
.about-text p+p{margin-top:16px}
.about-text em{font-style:normal;color:var(--ink);background:linear-gradient(transparent 62%,rgba(138,255,128,.28) 0)}
.about-text .hl{color:var(--green)}

.terminal{
  border:1px solid var(--line-2);border-radius:14px;background:var(--panel);overflow:hidden;
  box-shadow:0 24px 70px rgba(0,0,0,.4);
}
.term-head{
  display:flex;align-items:center;gap:8px;padding:11px 14px;border-bottom:1px solid var(--line);
  background:var(--panel-2);
}
.term-head .dot{width:11px;height:11px;border-radius:50%}
.term-head .dot.r{background:#ff5f57}.term-head .dot.y{background:#febc2e}.term-head .dot.g{background:#28c840}
.term-head .title{margin-left:8px;font-size:12px;color:var(--dim)}
.term-body{padding:18px 18px 22px;font-size:13.5px;max-height:320px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--dim) transparent}
.term-body::-webkit-scrollbar{width:5px}
.term-body::-webkit-scrollbar-thumb{background:var(--dim);border-radius:99px}
.term-body .prompt{color:var(--green)}
.term-body .cmd{color:var(--ink)}
.term-body .in{color:var(--ink)}
.term-body .out{color:var(--muted);margin-top:2px}
.term-body .line{color:var(--muted);white-space:pre-wrap;margin-top:2px}
.term-body .err{color:var(--pink)}
.term-body .out .ok{color:var(--green)}
.term-body .out .warn{color:var(--amber)}
.term-in{display:flex;align-items:center;gap:10px;padding:10px 16px;border-top:1px solid var(--line);background:var(--panel-2)}
.term-in .prompt{font-size:13px;color:var(--green);white-space:nowrap}
.term-in input{
  flex:1;background:transparent;border:none;outline:none;color:var(--ink);
  font-family:var(--mono);font-size:13px;caret-color:var(--green);
}
.term-in input::placeholder{color:var(--dim)}

/* ---------- skills ---------- */
.skill-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.skill-card{
  border:1px solid var(--line);border-radius:16px;background:var(--panel);
  padding:24px 20px;transition:.25s;position:relative;overflow:hidden;
}
.skill-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--green),var(--pink));opacity:0;transition:.3s;
}
.skill-card:hover{transform:translateY(-5px) rotate(-.6deg);border-color:var(--line-2);box-shadow:0 18px 46px rgba(0,0,0,.35)}
.skill-card:hover::before{opacity:1}
.skill-card .ico{font-size:26px;margin-bottom:14px;display:inline-block}
.skill-card h3{font-size:15px;margin-bottom:8px}
.skill-card p{font-size:12.8px;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:40px}
.tag{
  font-size:12.5px;color:var(--muted);border:1px solid var(--line-2);
  border-radius:99px;padding:6px 13px;transition:.2s;cursor:default;
}
.tag:hover{color:var(--bg);background:var(--green);border-color:var(--green);transform:translateY(-2px)}
.tag:hover:nth-child(3n){background:var(--amber);border-color:var(--amber)}
.tag:hover:nth-child(3n+1){background:var(--pink);border-color:var(--pink)}
.tag:hover:nth-child(3n+2){background:var(--blue);border-color:var(--blue)}

/* ---------- projects ---------- */
.project-card{
  border:1px solid var(--line-2);border-radius:18px;background:var(--panel);
  padding:38px;display:grid;grid-template-columns:1.3fr 1fr;gap:34px;align-items:center;
  box-shadow:0 24px 70px rgba(0,0,0,.32);transition:.25s;
}
.project-card:hover{border-color:rgba(138,255,128,.4);transform:translateY(-3px)}
.project-card h3{font-size:22px;letter-spacing:-.5px;margin-bottom:12px}
.project-card p{color:var(--muted);font-size:14px}
.project-card .big-link{
  display:inline-flex;align-items:center;gap:10px;margin-top:24px;font-size:15px;font-weight:700;color:var(--green);
}
.project-card .big-link:hover .arr{transform:translateX(6px)}
.project-card .arr{transition:transform .25s;display:inline-block}
.term-mini{
  border:1px solid var(--line);border-radius:12px;background:#0b0b0f;padding:18px;font-size:12.8px;line-height:2;color:var(--muted);
}
.term-mini .p{color:var(--green)}
.term-mini .b{color:var(--ink)}
.term-mini .a{color:var(--amber)}

/* ---------- contact ---------- */
.contact-card{
  text-align:center;border:1px solid var(--line-2);border-radius:24px;padding:76px 30px;
  background:radial-gradient(60% 90% at 50% 0%,rgba(138,255,128,.08),transparent 70%),var(--panel);
  position:relative;overflow:hidden;
}
.contact-card::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:36px 36px;
}
.contact-card>*{position:relative}
.contact-card h2{font-size:clamp(30px,5vw,46px);letter-spacing:-1.5px}
.contact-card h2 span{background:linear-gradient(90deg,var(--green),var(--amber));-webkit-background-clip:text;background-clip:text;color:transparent}
.contact-card p{color:var(--muted);font-size:14.5px;margin:16px auto 34px;max-width:440px}
.contact-card .btn{font-size:15px;padding:14px 30px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:40px 0;position:relative;z-index:2}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.footer-beian{font-size:12.5px;color:var(--dim)}
.footer-beian a{color:var(--muted);transition:.2s}
.footer-beian a:hover{color:var(--green)}
.footer-note{font-size:12px;color:var(--dim)}
.footer-note .heart{color:var(--pink)}

/* ---------- matrix overlay ---------- */
#matrixRain{position:fixed;inset:0;z-index:80;pointer-events:none}

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

/* ---------- responsive ---------- */
@media(max-width:860px){
  .about-grid,.project-card{grid-template-columns:1fr}
  .skill-grid{grid-template-columns:repeat(2,1fr)}
  .hero{padding:80px 0}
  .section{padding:70px 0}
}
@media(max-width:600px){
  .nav-links a:not(.gh-btn){display:none}
  .skill-grid{grid-template-columns:1fr}
  .hero h1{letter-spacing:-2px}
  .shell{width:96vw;bottom:10px}
  .project-card{padding:28px 22px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}