/* =========================================================
   AI智造坊 AI-ZZF · 深空粒子·神经网络 设计系统
   原型样式表（取自 docs/03-视觉设计规范）
   ========================================================= */

/* ---------- Tokens ---------- */
:root{
  --bg-0:#04050a; --bg-1:#070a12; --bg-2:#0b1020;
  --bg-grid:rgba(120,160,255,.045);
  --surface:rgba(255,255,255,.04); --surface-2:rgba(255,255,255,.065);
  --border:rgba(255,255,255,.09); --border-bright:rgba(120,200,255,.34);
  --cyan:#2dd4ff; --teal:#22d3ee; --violet:#8b5cf6; --magenta:#e23cff; --blue:#3b82f6;
  --text:#e8eef9; --text-dim:#9aa6bd; --text-faint:#5b6680;
  --grad-brand:linear-gradient(115deg,#2dd4ff 0%,#7c8cff 45%,#e23cff 100%);
  --glow-cyan:0 0 40px rgba(45,212,255,.35);
  --glow-soft:0 10px 50px rgba(0,0,0,.55);
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1240px;
  --font-sans:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,"Courier New",monospace;
}

/* ---------- Reset / Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans); color:var(--text);
  background:var(--bg-1); line-height:1.7; overflow-x:hidden;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
::selection{background:rgba(45,212,255,.3);color:#fff}

/* ---------- 背景层 ---------- */
#bg-net{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--bg-grid) 1px,transparent 1px),
                   linear-gradient(90deg,var(--bg-grid) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
          mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
}
.bg-vignette{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(120% 120% at 50% 40%,transparent 55%,rgba(2,3,7,.85) 100%);
}
.cursor-glow{
  position:fixed;top:0;left:0;width:520px;height:520px;z-index:1;pointer-events:none;
  transform:translate(-50%,-50%);opacity:0;transition:opacity .4s;
  background:radial-gradient(circle,rgba(45,212,255,.10),transparent 62%);
}

/* 内容层级 */
.nav,main,.footer{position:relative;z-index:2}

/* ---------- 容器 ---------- */
.container{width:min(var(--maxw),92vw);margin-inline:auto}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s var(--ease)}
.nav__inner{
  width:min(var(--maxw),94vw);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 0;transition:.4s var(--ease);
}
.nav.scrolled{backdrop-filter:blur(16px) saturate(160%);background:rgba(7,10,18,.72);
  border-bottom:1px solid var(--border);box-shadow:0 8px 40px rgba(0,0,0,.4)}
.nav.scrolled .nav__inner{padding:13px 0}
.brand{display:flex;align-items:center;gap:11px}
.brand__mark{display:grid;place-items:center;filter:drop-shadow(0 0 8px rgba(45,212,255,.5))}
.brand__text{display:flex;flex-direction:column;line-height:1.05}
.brand__text b{font-size:1.12rem;letter-spacing:.04em}
.brand__text i{font-style:normal;font-family:var(--font-mono);font-size:.64rem;letter-spacing:.32em;color:var(--cyan)}
.nav__links{display:flex;align-items:center;gap:34px}
.nav__links>a{font-size:.95rem;color:var(--text-dim);position:relative;transition:color .25s}
.nav__links>a:not(.nav__cta)::after{content:'';position:absolute;left:0;bottom:-6px;width:0;height:1px;
  background:var(--cyan);box-shadow:0 0 8px var(--cyan);transition:width .3s var(--ease)}
.nav__links>a:hover{color:var(--text)}
.nav__links>a:hover::after{width:100%}
.nav__cta{
  padding:9px 18px;border-radius:999px;border:1px solid var(--border-bright);
  color:var(--text)!important;background:rgba(45,212,255,.06);transition:.25s
}
.nav__cta:hover{background:rgba(45,212,255,.14);box-shadow:var(--glow-cyan);transform:translateY(-1px)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__burger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}
.nav__burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.92em 1.7em;border-radius:999px;
  font-weight:600;font-size:.96rem;letter-spacing:.01em;cursor:pointer;border:1px solid transparent;
  transition:.28s var(--ease);position:relative;overflow:hidden}
.btn--primary{background:linear-gradient(115deg,#2dd4ff,#7c8cff);color:#05060a;
  box-shadow:0 6px 26px rgba(45,212,255,.32)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 10px 40px rgba(45,212,255,.5)}
.btn--primary::after{content:'';position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-20deg);transition:left .6s var(--ease)}
.btn--primary:hover::after{left:140%}
.btn--ghost{background:rgba(255,255,255,.025);border-color:var(--border-bright);color:var(--text)}
.btn--ghost:hover{background:rgba(45,212,255,.08);box-shadow:var(--glow-cyan);transform:translateY(-2px)}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
#hero3d{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.hero__inner{position:relative;z-index:2;width:min(var(--maxw),92vw);margin-inline:auto;padding-top:80px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);
  font-size:.74rem;letter-spacing:.28em;color:var(--cyan);text-transform:uppercase;
  padding:7px 15px;border:1px solid var(--border);border-radius:999px;background:var(--surface)}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);
  animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero__title{font-size:clamp(3rem,8.4vw,7rem);line-height:1.02;font-weight:800;letter-spacing:-.02em;
  margin:26px 0 22px;text-shadow:0 4px 40px rgba(0,0,0,.5)}
.grad{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 24px rgba(124,140,255,.35))}
.hero__sub{max-width:46ch;font-size:clamp(1.02rem,1.6vw,1.22rem);color:var(--text-dim);margin-bottom:34px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero__pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:42px}
.hero__pills li{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.06em;color:var(--text-dim);
  padding:7px 14px;border:1px solid var(--border);border-radius:999px;background:var(--surface);
  transition:.25s}
.hero__pills li:hover{color:var(--cyan);border-color:var(--border-bright);box-shadow:var(--glow-cyan)}
.scroll-cue{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.3em;color:var(--text-faint)}
.scroll-cue span{width:1px;height:46px;background:linear-gradient(var(--cyan),transparent);position:relative;overflow:hidden}
.scroll-cue span::after{content:'';position:absolute;top:-50%;left:0;width:100%;height:50%;
  background:var(--cyan);box-shadow:0 0 8px var(--cyan);animation:cue 1.8s var(--ease) infinite}
@keyframes cue{to{top:120%}}

/* ---------- Marquee ---------- */
.marquee{border-block:1px solid var(--border);background:rgba(7,10,18,.5);overflow:hidden;padding:18px 0}
.marquee__track{display:flex;align-items:center;gap:26px;white-space:nowrap;width:max-content;
  animation:scroll-x 28s linear infinite;font-family:var(--font-mono);letter-spacing:.12em;color:var(--text-dim)}
.marquee__track span{font-size:.95rem}
.marquee__track i{color:var(--cyan);font-style:normal;font-size:.7rem;filter:drop-shadow(0 0 6px var(--cyan))}
@keyframes scroll-x{to{transform:translateX(-50%)}}

/* ---------- Section / 标题 ---------- */
.section{padding:clamp(5rem,10vw,9rem) 0}
.section--alt{background:linear-gradient(180deg,transparent,rgba(11,16,32,.5),transparent)}
.sec-head{max-width:680px;margin-bottom:54px}
.sec-head__tag{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.26em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:16px}
.sec-head__title{font-size:clamp(1.7rem,3.4vw,2.7rem);font-weight:700;letter-spacing:-.01em;line-height:1.2}
.sec-head__desc{color:var(--text-dim);margin-top:14px;font-size:1.05rem}
.sec-more{margin-top:44px;text-align:center}

/* ---------- 产品卡 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{position:relative;border:1px solid var(--border);border-radius:20px;overflow:hidden;
  background:var(--surface);backdrop-filter:blur(14px) saturate(160%);
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;will-change:transform}
.card:hover{border-color:var(--border-bright);box-shadow:var(--glow-soft),0 0 40px rgba(45,212,255,.14);
  transform:translateY(-6px)}
.card__art{position:relative;height:148px;display:grid;place-items:center;overflow:hidden}
.card__art b{font-family:var(--font-mono);font-size:2.5rem;font-weight:700;letter-spacing:.14em;
  color:rgba(255,255,255,.92);opacity:.85;mix-blend-mode:overlay;text-shadow:0 0 24px rgba(255,255,255,.4)}
.card__art .art__noise{position:absolute;inset:0;opacity:.22;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.card__art::after{content:'';position:absolute;inset:0;mix-blend-mode:overlay;opacity:.5;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 4px)}
/* 各产品能量视觉 */
.art--a{background:radial-gradient(120% 120% at 18% 22%,rgba(45,212,255,.6),transparent 52%),radial-gradient(120% 120% at 82% 72%,rgba(124,140,255,.5),transparent 55%),#060912}
.art--b{background:radial-gradient(120% 120% at 22% 28%,rgba(226,60,255,.55),transparent 52%),radial-gradient(120% 120% at 80% 70%,rgba(59,130,246,.5),transparent 55%),#080611}
.art--c{background:radial-gradient(120% 120% at 20% 24%,rgba(34,211,238,.55),transparent 52%),radial-gradient(120% 120% at 78% 74%,rgba(94,234,160,.42),transparent 56%),#04100f}
.art--d{background:radial-gradient(120% 120% at 24% 26%,rgba(59,130,246,.55),transparent 52%),radial-gradient(120% 120% at 82% 70%,rgba(45,212,255,.5),transparent 55%),#05080f}
.art--e{background:radial-gradient(120% 120% at 20% 24%,rgba(139,92,246,.55),transparent 52%),radial-gradient(120% 120% at 80% 72%,rgba(45,212,255,.45),transparent 56%),#0a0714}
.art--f{background:radial-gradient(120% 120% at 22% 26%,rgba(226,60,255,.5),transparent 52%),radial-gradient(120% 120% at 80% 70%,rgba(45,212,255,.5),transparent 55%),#0a0712}
.card__body{padding:22px 22px 26px}
.card__body h3{font-size:1.22rem;font-weight:700;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.card__body h3 i{font-style:normal;font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;
  color:var(--cyan);opacity:.85}
.card__body p{color:var(--text-dim);font-size:.96rem;margin:12px 0 16px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags li{font-size:.74rem;color:var(--text-dim);padding:5px 11px;border:1px solid var(--border);
  border-radius:999px;background:rgba(255,255,255,.02)}
/* 跟随指针的高光 */
.card__glow{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(360px circle at var(--mx,50%) var(--my,0%),rgba(45,212,255,.12),transparent 60%)}
.card:hover .card__glow{opacity:1}

/* ---------- 技术能力 ---------- */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tech{padding:30px 26px;border:1px solid var(--border);border-radius:18px;background:var(--surface);
  backdrop-filter:blur(12px);transition:.3s var(--ease)}
.tech:hover{border-color:var(--border-bright);transform:translateY(-4px);box-shadow:var(--glow-soft)}
.tech__ico{display:inline-grid;place-items:center;width:54px;height:54px;border-radius:14px;
  color:var(--cyan);background:rgba(45,212,255,.08);border:1px solid var(--border-bright);
  box-shadow:inset 0 0 18px rgba(45,212,255,.12);margin-bottom:18px}
.tech h3{font-size:1.12rem;display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.tech h3 i{font-style:normal;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.14em;color:var(--text-faint)}
.tech p{color:var(--text-dim);font-size:.94rem;margin-top:10px}

/* ---------- 数据指标 ---------- */
.stats{padding:64px 0;border-block:1px solid var(--border);
  background:linear-gradient(180deg,rgba(11,16,32,.4),rgba(7,10,18,.2))}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat__num{font-family:var(--font-mono);font-size:clamp(2.4rem,5vw,3.6rem);font-weight:700;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 18px rgba(45,212,255,.3));display:block;line-height:1}
.stat span{color:var(--text-dim);font-size:.96rem;margin-top:10px;display:block}

/* ---------- 作品墙 ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:202px;gap:16px}
.shot{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--border);cursor:pointer}
.shot::before{content:'';position:absolute;inset:0;background-size:cover;
  transform:scale(1.03);transition:transform .65s var(--ease),filter .5s}
.shot::after{content:'';position:absolute;inset:0;opacity:.5;mix-blend-mode:overlay;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 5px),
            url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.shot:hover::before{transform:scale(1.12);filter:brightness(1.18) saturate(1.15)}
.shot figcaption{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:16px 18px;
  font-size:.86rem;color:var(--text);letter-spacing:.02em;
  background:linear-gradient(transparent,rgba(2,3,7,.8))}
.shot .play{position:absolute;inset:0;z-index:2;display:grid;place-items:center;font-size:1.6rem;color:#fff;
  text-shadow:0 0 18px rgba(45,212,255,.8);transition:transform .3s}
.shot:hover .play{transform:scale(1.25)}
/* 显式排布：两大六小拼满 */
.g--1{grid-column:1/3;grid-row:1/3}
.g--2{grid-column:3;grid-row:1}
.g--3{grid-column:4;grid-row:1}
.g--4{grid-column:1;grid-row:3}
.g--5{grid-column:2;grid-row:3}
.g--6{grid-column:3/5;grid-row:2/4}
.g--1::before{background:radial-gradient(100% 100% at 20% 20%,rgba(45,212,255,.6),transparent 55%),radial-gradient(90% 90% at 85% 80%,rgba(226,60,255,.5),transparent 55%),radial-gradient(80% 80% at 60% 50%,rgba(124,140,255,.4),transparent 60%),#05070e}
.g--2::before{background:radial-gradient(110% 110% at 30% 30%,rgba(226,60,255,.55),transparent 55%),radial-gradient(90% 90% at 80% 80%,rgba(59,130,246,.5),transparent 55%),#080611}
.g--3::before{background:radial-gradient(110% 110% at 70% 25%,rgba(34,211,238,.55),transparent 55%),radial-gradient(90% 90% at 25% 80%,rgba(94,234,160,.4),transparent 58%),#04100f}
.g--4::before{background:radial-gradient(110% 110% at 30% 70%,rgba(139,92,246,.55),transparent 55%),radial-gradient(90% 90% at 80% 25%,rgba(45,212,255,.5),transparent 55%),#0a0714}
.g--5::before{background:radial-gradient(110% 110% at 65% 65%,rgba(59,130,246,.55),transparent 55%),radial-gradient(90% 90% at 25% 25%,rgba(45,212,255,.5),transparent 55%),#05080f}
.g--6::before{background:radial-gradient(90% 90% at 75% 30%,rgba(45,212,255,.55),transparent 55%),radial-gradient(100% 100% at 20% 80%,rgba(226,60,255,.5),transparent 55%),radial-gradient(80% 80% at 50% 50%,rgba(124,140,255,.35),transparent 60%),#06070f}
.shot.has-image::before{background-image:var(--shot-img);background-position:center;background-size:cover}

/* ---------- CTA ---------- */
.cta{padding:clamp(5rem,9vw,8rem) 0}
.cta__box{position:relative;text-align:center;padding:clamp(3rem,6vw,5rem) 6vw;border-radius:28px;
  border:1px solid var(--border-bright);overflow:hidden;
  background:radial-gradient(120% 160% at 50% 0%,rgba(45,212,255,.1),transparent 60%),rgba(11,16,32,.55);
  backdrop-filter:blur(16px);box-shadow:var(--glow-soft)}
.cta__box h2{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;margin:12px 0 14px;line-height:1.1}
.cta__box>p{color:var(--text-dim);margin-bottom:30px}
.cta__actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--border);background:var(--bg-0);padding-top:60px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;padding-bottom:44px}
.footer__brand .brand__text{flex-direction:row;align-items:baseline;gap:9px}
.footer__brand .brand__text b{font-size:1.18rem}
.footer__brand .brand__text i{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.28em;color:var(--cyan)}
.footer__brand p{color:var(--text-faint);font-size:.9rem;margin-top:14px;line-height:1.8}
.footer__col h4{font-size:.86rem;letter-spacing:.12em;color:var(--text);margin-bottom:16px;text-transform:uppercase}
.footer__col a{display:block;color:var(--text-dim);font-size:.92rem;padding:5px 0;transition:color .25s}
.footer__col a:hover{color:var(--cyan)}
.footer__bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
  padding:22px 0;border-top:1px solid var(--border);color:var(--text-faint);font-size:.84rem}

/* ---------- 滚动揭示 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .cards,.tech-grid{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:170px}
  .g--1,.g--2,.g--3,.g--4,.g--5,.g--6{grid-column:auto;grid-row:auto}
  .g--1,.g--6{grid-column:span 2}
}
@media(max-width:760px){
  .nav__burger{display:flex}
  .nav__links{position:fixed;inset:0 0 0 auto;width:min(78vw,320px);flex-direction:column;
    align-items:flex-start;justify-content:center;gap:26px;padding:40px;
    background:rgba(7,10,18,.96);backdrop-filter:blur(20px);border-left:1px solid var(--border);
    transform:translateX(100%);transition:transform .4s var(--ease)}
  .nav__links.open{transform:none}
  .nav__links>a{font-size:1.3rem}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:36px 16px}
  .stat__num{font-size:2.6rem}
}
@media(max-width:520px){
  .cards,.tech-grid{grid-template-columns:1fr}
  .hero__inner{padding-top:110px}
  .footer__grid{grid-template-columns:1fr}
}

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