/* ============================================================
   EX. — 量化研究 · 研究流程工程 | 作品集样式（浅色 · 霓虹版）
   浅底 + 赛博朋克装饰：霓虹渐变 / HUD 角标 / 合成器网格 / 电路
   ============================================================ */

:root{
  --bg:        #F6F8FD;
  --card:      #FFFFFF;
  --card-2:    #F3F6FC;
  --ink:       #0B0E1A;
  --ink-2:     #39415A;
  --ink-3:     #5E6784;
  --ink-4:     #6C7690;
  --line:      rgba(11,14,26,.10);
  --line-2:    rgba(11,14,26,.16);
  --cy:        #06B6D4;   /* 装饰用青 */
  --cy-2:      #22D3EE;
  --cy-ink:    #0E7490;   /* 文本用青 */
  --mg:        #E6007A;   /* 装饰用品红 */
  --mg-ink:    #C2185B;   /* 文本用品红 */
  --pu:        #7C3AED;
  --green:     #00E676;
  --neon:      linear-gradient(90deg,#00E5FF,#E6007A 55%,#7C3AED);
  --grad-ink:  linear-gradient(90deg,#0E7490,#C2185B 55%,#7C3AED);
  --radius:    14px;
  --wrap:      1080px;
  --font:      "Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Helvetica,Arial,sans-serif;
  --mono:      Consolas,ui-monospace,SFMono-Regular,"Liberation Mono",Menlo,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(1000px 420px at 85% -6%, rgba(0,229,255,.10), transparent 60%),
    radial-gradient(900px 380px at 5% -8%, rgba(230,0,122,.08), transparent 55%),
    linear-gradient(rgba(11,14,26,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,14,26,.032) 1px, transparent 1px),
    var(--bg);
  background-size:auto,auto,44px 44px,44px 44px,auto;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--cy-ink);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible{outline:2px solid var(--cy);outline-offset:2px;border-radius:4px}
::selection{background:rgba(0,229,255,.30)}
.mono{font-family:var(--mono)}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:100}
.skip:focus{left:0}

/* ---------------- top bar ---------------- */
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(10px);
  background:rgba(255,255,255,.85);
  border-bottom:1px solid var(--line);
}
.topbar::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--neon)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.mark{
  font-weight:800;font-size:20px;letter-spacing:1.5px;
  background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.topbar nav{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.topbar nav a{color:var(--ink-2);font-size:14px;padding:6px 10px;border-radius:8px}
.topbar nav a:hover{color:var(--ink);background:rgba(11,14,26,.05);text-decoration:none}
.topbar nav a.nav-gh{color:var(--ink);border:1px solid var(--line-2);margin-left:6px}
.topbar nav a.nav-gh:hover{border-color:var(--ink);box-shadow:0 4px 14px -8px rgba(230,0,122,.5)}

/* ---------------- hero ---------------- */
.hero{padding:34px 0 8px}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:36px;align-items:center}
.kicker{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 16px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--cy-ink);
}
.kicker::before{content:"";width:26px;height:2px;background:var(--neon);border-radius:2px}
.hero h1{
  margin:0 0 16px;
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.26;font-weight:800;letter-spacing:.3px;
}
.nw{white-space:nowrap}
.grad{
  position:relative;display:inline-block;
  background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.grad[data-text]::before,
.grad[data-text]::after{
  content:attr(data-text);position:absolute;left:0;top:0;z-index:-1;white-space:nowrap;
  background:none;-webkit-text-fill-color:initial;color:#00E5FF;opacity:.55;
  transform:translate(-2px,-1px);
}
.grad[data-text]::after{color:#FF2D95;opacity:.5;transform:translate(2px,1px)}
@keyframes glitchA{
  0%,90%,100%{transform:translate(-2px,-1px);opacity:.55}
  92%{transform:translate(-4px,-2px);opacity:.75}
  94%{transform:translate(-1px,0);opacity:.4}
  96%{transform:translate(-3px,-1px);opacity:.65}
}
@keyframes glitchB{
  0%,90%,100%{transform:translate(2px,1px);opacity:.5}
  92%{transform:translate(4px,2px);opacity:.7}
  94%{transform:translate(1px,0);opacity:.38}
  96%{transform:translate(3px,1px);opacity:.6}
}
.grad[data-text]::before{animation:glitchA 7s infinite steps(1)}
.grad[data-text]::after{animation:glitchB 7s infinite steps(1)}
.sub{color:var(--ink-2);max-width:860px;margin:0 0 6px;font-size:16.5px}
.sub-en{color:var(--ink-4);font-style:italic;margin:0 0 22px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:6px 0 26px}
.btn{
  display:inline-block;padding:10px 18px;border-radius:12px;font-size:14.5px;font-weight:600;
  color:var(--ink);border:1px solid var(--line-2);background:#fff;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);border-color:var(--ink);
  box-shadow:0 10px 26px -12px rgba(6,182,212,.55), 0 4px 14px -8px rgba(230,0,122,.4)}
.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink);
  box-shadow:0 8px 22px -12px rgba(11,14,26,.65)}
.btn.primary:hover{box-shadow:0 12px 28px -10px rgba(230,0,122,.6), 0 0 0 1px rgba(0,229,255,.35)}

.hero-panel img{width:100%;max-width:560px;margin-left:auto;
  filter:drop-shadow(0 22px 34px rgba(6,182,212,.16)) drop-shadow(0 10px 22px rgba(230,0,122,.10))}

/* HUD 角标（.corners 与卡片共用） */
.corners{position:relative}
.corners::before,.card::before{
  content:"";position:absolute;inset:7px;pointer-events:none;z-index:2;
  background:
    linear-gradient(var(--cy),var(--cy)) left top/16px 2px no-repeat,
    linear-gradient(var(--cy),var(--cy)) left top/2px 16px no-repeat,
    linear-gradient(var(--mg),var(--mg)) right top/16px 2px no-repeat,
    linear-gradient(var(--mg),var(--mg)) right top/2px 16px no-repeat,
    linear-gradient(var(--mg),var(--mg)) left bottom/16px 2px no-repeat,
    linear-gradient(var(--mg),var(--mg)) left bottom/2px 16px no-repeat,
    linear-gradient(var(--cy),var(--cy)) right bottom/16px 2px no-repeat,
    linear-gradient(var(--cy),var(--cy)) right bottom/2px 16px no-repeat;
  opacity:.8;
}

.stats{
  display:flex;flex-wrap:wrap;gap:14px 34px;list-style:none;margin:30px 0 8px;padding:20px 24px;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
  box-shadow:0 18px 40px -30px rgba(11,14,26,.35);
  position:relative;
}
.stats::after{content:"";position:absolute;left:14px;right:14px;top:0;height:3px;background:var(--neon);border-radius:0 0 3px 3px}
.stats li{display:flex;flex-direction:column;line-height:1.35}
.stats b{font-size:20px;font-family:var(--mono);letter-spacing:.2px;
  background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:12.5px;color:var(--ink-4)}

/* ---------------- divider ---------------- */
.divider{display:block;width:100%;height:30px;opacity:.55;margin:0}

/* ---------------- sections ---------------- */
.section{padding:40px 0 6px}
.sec-head{display:flex;align-items:baseline;gap:14px;margin:0 0 20px}
.sec-head .num{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--cy-ink);
  border:1px solid rgba(6,182,212,.55);background:#fff;border-radius:8px;padding:2px 9px;
  box-shadow:0 4px 14px -10px rgba(6,182,212,.8);
}
.sec-head h2{font-size:26px;margin:0;font-weight:800;letter-spacing:.3px}
.sec-head::after{content:"";flex:1;height:1px;background:var(--line-2)}
.lead{color:var(--ink-2);margin:0 0 18px}
.lead b{color:var(--ink)}

/* ---------------- tables ---------------- */
.tbl{width:100%;border-collapse:collapse;font-size:15px;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card)}
.tbl thead th{
  background:var(--card-2);color:var(--ink-2);text-align:left;font-weight:700;
  padding:12px 16px;border-bottom:1px solid var(--line);font-size:13.5px;letter-spacing:.35px;
}
.tbl td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}
.tbl tbody tr:last-child td{border-bottom:0}
.tbl tbody tr:hover td{background:rgba(6,182,212,.045)}
.tbl td b{color:var(--ink)}
.tbl code{font-family:var(--mono);font-size:13.5px;color:var(--ink);
  background:rgba(6,182,212,.08);border:1px solid rgba(6,182,212,.35);border-radius:6px;padding:1px 7px}

/* ---------------- cards ---------------- */
.card{
  position:relative;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:var(--card);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  margin-bottom:26px;
  box-shadow:0 16px 40px -32px rgba(11,14,26,.4);
}
.card::after{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--neon);opacity:.9;z-index:3}
.card:hover{transform:translateY(-3px);border-color:rgba(6,182,212,.55);
  box-shadow:0 24px 48px -26px rgba(6,182,212,.45), 0 12px 30px -20px rgba(230,0,122,.35)}
.card .media{display:block}
.card .media img{width:100%;border-bottom:1px solid var(--line)}
.card .body{padding:20px 22px 22px}
.card h3{margin:0 0 2px;font-size:21px;letter-spacing:.2px}
.card h3 a{color:var(--ink)}
.card h3 a:hover{text-decoration:none;color:var(--mg-ink)}
.tagline{margin:0 0 10px;color:var(--mg-ink);font-style:italic;font-size:14.5px;font-weight:600}
.desc{margin:0 0 14px;color:var(--ink-2);font-size:15px}
.flagship .body{padding:24px 26px 26px}
.flagship h3{font-size:25px}
.head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.pin{
  font-size:12px;font-weight:700;letter-spacing:.5px;color:#fff;
  background:var(--grad-ink);border-radius:999px;padding:3px 11px;
}

/* chips（HUD 标签） */
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0 0 16px;padding:0}
.chips li{
  display:inline-flex;align-items:center;
  font-family:var(--mono);font-size:12.5px;color:#2A3247;
  padding:3px 10px;border-radius:6px;
  border:1px solid var(--line-2);background:#fff;
  box-shadow:0 2px 8px -6px rgba(11,14,26,.4);
}
.chips li::before{content:"";width:6px;height:6px;background:var(--cy-2);margin-right:7px;
  transform:rotate(45deg);flex:0 0 auto}
.chips li:nth-child(3n+2)::before{background:var(--mg)}
.chips li:nth-child(3n)::before{background:var(--pu)}
.chips.big li{font-size:13.5px;padding:6px 13px}
.chips.big{margin-bottom:18px}

/* links row */
.links{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 4px}
.lnk{
  font-size:14px;font-weight:600;color:var(--ink);font-family:var(--mono);
  border:1px solid var(--line-2);border-radius:8px;padding:7px 14px;background:#fff;
  transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease;
}
.lnk:hover{text-decoration:none;border-color:var(--cy);
  transform:translateY(-1px);box-shadow:0 8px 20px -12px rgba(6,182,212,.8)}
.upstream{margin:14px 0 0;font-size:12.5px;color:var(--ink-4)}
.upstream a{color:var(--ink-4);text-decoration:underline dotted}

/* flagship case strip */
.case{
  display:flex;gap:12px;overflow-x:auto;padding:4px 2px 10px;margin:2px 0 8px;
  scrollbar-width:thin;
}
.case img{
  height:250px;width:auto;border-radius:10px;border:1px solid var(--line-2);
  box-shadow:0 16px 34px -22px rgba(11,14,26,.55);flex:0 0 auto;background:#fff;
}
.case-note{margin:0 0 16px;color:var(--ink-4);font-size:13.5px}
.case-note b{color:var(--ink-2)}

/* grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:26px}
.grid .card{margin-bottom:0;display:flex;flex-direction:column}
.grid .card .body{display:flex;flex-direction:column;flex:1}
.grid .card .upstream{margin-top:auto;padding-top:12px}

/* contribution */
.contrib{
  position:relative;margin-top:28px;border:1px solid var(--line);border-radius:12px;padding:20px 24px;
  background:linear-gradient(180deg,rgba(124,58,237,.05),rgba(255,255,255,.9)),var(--card);
}
.contrib::after{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--neon);border-radius:3px}
.contrib h3{margin:0 0 10px;font-size:17px}
.contrib ul{margin:0;padding-left:20px;color:var(--ink-2);font-size:14.5px}
.contrib li{margin:4px 0}

/* ---------------- side strip (decor) ---------------- */
.side-strip{
  position:fixed;right:14px;top:50%;transform:translateY(-50%);
  width:44px;z-index:40;pointer-events:none;display:none;opacity:.95;
}
@media (min-width:1340px){.side-strip{display:block}}

/* ---------------- footer ---------------- */
.footer{margin-top:56px;border-top:1px solid var(--line);padding:26px 0 40px}
.sysline{
  display:flex;align-items:center;gap:9px;margin:0 0 14px;flex-wrap:wrap;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--ink-3);
}
.sysline .dot{width:7px;height:7px;border-radius:50%;background:var(--green);
  box-shadow:0 0 10px rgba(0,230,118,.9);flex:0 0 auto}
.footer p{margin:4px 0;color:var(--ink-4);font-size:13.5px}
.footer .fine{font-size:12px}
.barcode{
  width:190px;height:30px;margin-top:18px;opacity:.7;
  background:repeating-linear-gradient(90deg,
    #0B0E1A 0 2px,transparent 2px 5px,
    #0B0E1A 5px 8px,transparent 8px 10px,
    #0B0E1A 10px 11px,transparent 11px 15px,
    #0B0E1A 15px 19px,transparent 19px 21px);
}

/* ---------------- responsive ---------------- */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:20px}
  .hero-panel img{margin:0 auto}
}
@media (max-width:760px){
  .hero{padding-top:22px}
  .topbar .wrap{height:auto;flex-direction:column;gap:2px;padding:8px 22px}
  .sec-head h2{font-size:22px}
  .stats{gap:12px 22px;padding:16px}
  .stats b{font-size:17px}
  .flagship h3{font-size:21px}
  .case img{height:190px}
  .tbl{font-size:13.5px}
  .tbl thead th,.tbl td{padding:10px 12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* ---------------- print / PDF export ---------------- */
@media print{
  html{scroll-behavior:auto}
  body{background:#fff;background-image:none;background-attachment:scroll}
  .topbar,.skip,.side-strip{display:none!important}
  .hero{padding-top:4px}
  .hero-grid{display:block}
  .hero-panel img{max-width:430px;margin:10px 0 0}
  .grad{background:none;color:var(--ink);-webkit-text-fill-color:var(--ink)}
  .grad[data-text]::before,.grad[data-text]::after{display:none}
  .mark{background:none;color:var(--ink);-webkit-text-fill-color:var(--ink)}
  .stats b{background:none;color:var(--ink);-webkit-text-fill-color:var(--ink)}
  .section{padding:16px 0 2px}
  .card,.contrib,.stats{box-shadow:none}
  .grid{grid-template-columns:1fr 1fr}
  .grid .card,.contrib,.stats,.tbl tr,.hero-panel,.hero-copy{break-inside:avoid}
  .card,.stats,.contrib,.tbl{border-color:#C9D2E3}
  .case{overflow:visible;flex-wrap:wrap}
  .case img{height:190px}
  a{color:var(--ink);text-decoration:underline}
  .upstream a,.footer a{color:var(--ink)}
}