@charset "UTF-8";
/* ============================================================
   拾界科技官网 · 品牌设计系统（融合拾界 BI）
   版式：滚动驱动分层图板 / 超大标题 / 编辑式分区 / 页脚巨字
   品牌四色：墨 #17171C / 朱 #D6401F（仅数据构件与 kicker 短道）/
             纸白 #F6F4EF / 石灰 #6E6E73
   字体：中文 Noto Sans SC · 数字标注 JetBrains Mono · 字标 Jura
        （均用系统回退，不引外部 CDN 字体，避免国内加载失败）
   ============================================================ */
:root{
  --black:#17171C;--green:#17171C;--green-soft:#B4B0A6;--accent:#D6401F;--tan:#D6401F;
  --paper:#E9E5D9;--card:#F1EDE3;--white:#F6F4EF;--ink:#17171C;--gray:#6E6E73;--gray-2:#9A9A9F;
  --line:#F6F4EF24;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Cascadia,Consolas,"Liberation Mono",monospace;
  --display:"Jura","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --ease:cubic-bezier(.22,.68,.15,1);--gutter:24px;--r:20px;--r-lg:28px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{background:var(--black);color:var(--white);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
body.modal-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
img{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.mono{font-family:var(--mono);font-size:10px;letter-spacing:1.5px}
.accent{color:var(--accent)}.tan{color:var(--tan)}.orange{color:#D6401F}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:-60px;left:20px;z-index:200;background:var(--white);color:var(--black);padding:12px 18px;font-size:13px}
.skip-link:focus{top:12px}

/* ---------- 头部 ---------- */
.header{position:fixed;inset:0 0 auto;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:28px;height:76px;padding:0 30px;transition:transform .4s var(--ease),background .3s,backdrop-filter .3s}
.header.solid{background:#000000c7;backdrop-filter:blur(14px);box-shadow:0 1px #F6F4EF14}
.header.hidden{transform:translateY(-101%)}
.brand{display:flex;align-items:center;gap:11px;font-size:19px;font-weight:700;letter-spacing:2px}
.brand small{display:block;font-family:var(--mono);font-size:7px;font-weight:400;letter-spacing:1.8px;color:#F6F4EF8C;margin-top:4px}
.nav{display:flex;align-items:center;gap:34px;font-size:13px;color:#DAD6CB}
.nav a{position:relative;padding:6px 0;transition:color .25s}
.nav a:hover{color:#F6F4EF}
.nav a.is-current:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:#F6F4EF}
.header-cta{background:var(--white);color:var(--black);font-size:13px;font-weight:600;padding:11px 24px;border-radius:999px;transition:background .25s,transform .25s}
.header-cta:hover{background:#C9C4B6;transform:translateY(-1px)}
.menu-toggle{display:none;flex-direction:column;gap:6px;padding:10px}
.menu-toggle span{display:block;width:20px;height:1.5px;background:#F6F4EF}

/* ---------- 首屏大图卡 ---------- */
.hero{padding:96px var(--gutter) 0}
.hero-card{position:relative;border-radius:var(--r);overflow:hidden;height:min(66vh,660px);min-height:420px;background:#101014;isolation:isolate;will-change:transform}
.hero-card img,.hero-card video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 55%;filter:brightness(.78) saturate(.9)}
.hero-shade{position:absolute;inset:0;background:linear-gradient(0deg,#000000a6 0%,transparent 42%),linear-gradient(90deg,#00000073 0%,transparent 55%)}
.hero-copy{position:absolute;inset:0;display:grid;place-items:center;padding:0 6vw;text-align:center}
.hero-copy h1{font-size:clamp(34px,5.2vw,68px);font-weight:800;letter-spacing:-1.5px;line-height:1.28;text-shadow:0 2px 40px #00000073}
.hero-hint{position:absolute;right:26px;bottom:24px;display:flex;align-items:center;gap:12px;color:#F6F4EFB3}
.hero-hint-arrow{display:grid;place-items:center;width:34px;height:34px;border:1px solid #F6F4EF59;border-radius:50%;font-size:15px;animation:hint-bob 2.2s var(--ease) infinite}
.hero-tag{position:absolute;left:26px;bottom:26px;color:#F6F4EF8C}
@keyframes hint-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}

/* ---------- 3D 分层图板 ---------- */
.field{position:relative;height:170vh;background:var(--black)}
.field-inner{position:sticky;top:0;min-height:100vh;display:grid;grid-template-columns:42% 58%;align-items:center;gap:4vw;padding:0 5vw}
.field-copy .kicker{display:block;color:#F6F4EF73;margin-bottom:26px}
.field-copy h2{font-size:clamp(32px,3.8vw,58px);font-weight:800;letter-spacing:-1.5px;line-height:1.32}
.field-copy h2 .dim{color:#F6F4EF8C}
.field-copy p{font-size:15px;line-height:2.1;color:#A6A6AB;max-width:400px;margin-top:30px}
.text-link{display:inline-flex;align-items:center;gap:14px;margin-top:36px;font-size:14px;color:#DAD6CB;border-bottom:1px solid #F6F4EF59;padding-bottom:10px;transition:border-color .3s}
.text-link span{transition:transform .3s var(--ease)}
.text-link:hover{border-color:#F6F4EF}
.text-link:hover span{transform:translateY(4px)}
.field-stage{position:relative;height:min(60vh,560px);perspective:1500px;transform-style:preserve-3d;will-change:transform}
.panel{position:absolute;top:50%;left:50%;width:76%;aspect-ratio:16/10;border-radius:18px;overflow:hidden;border:1px solid #F6F4EF2B;box-shadow:0 30px 90px #000000a6;background:#101014;will-change:transform}
.panel img,.panel video{width:100%;height:100%;object-fit:cover;filter:brightness(.82) saturate(.85)}
.panel-1{transform:translate(-50%,-50%) translateZ(70px)}
.panel-2{transform:translate(-50%,-50%) translateZ(-70px) translate(-10%,7%)}
.panel-3{transform:translate(-50%,-50%) translateZ(-190px) translate(-20%,14%)}
.panel-wire{position:absolute;top:50%;left:50%;width:76%;aspect-ratio:16/10;transform:translate(-50%,-50%) translateZ(72px);pointer-events:none}

/* ---------- 深绿大卡区 ---------- */
.approach{background:var(--black);padding:10vh var(--gutter) 12vh}
.approach-card{position:relative;background:var(--green);border-radius:var(--r-lg);padding:clamp(40px,5vw,76px);display:grid;grid-template-columns:minmax(240px,340px) 1fr;gap:clamp(32px,4vw,64px);align-items:center;overflow:hidden;will-change:transform,opacity}
.approach-pip{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3;background:#101014}
.approach-pip img,.approach-pip video{width:100%;height:100%;object-fit:cover;filter:brightness(.9)}
.pip-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:58px;height:58px;border-radius:50%;background:#17171CA6;border:1px solid #F6F4EF80;color:#F6F4EF;font-size:15px;letter-spacing:1px;padding-left:0;backdrop-filter:blur(4px);transition:background .25s,transform .25s}
.pip-play:hover{background:#2A2A33CC;transform:translate(-50%,-50%) scale(1.06)}
.pip-label{position:absolute;left:14px;bottom:12px;color:#F6F4EFD1;font-size:9px}
.approach-tag{display:block;color:#F6F4EF85;margin-bottom:22px}
.approach-copy h2{font-size:clamp(30px,3.6vw,54px);font-weight:800;letter-spacing:-1.5px;line-height:1.3}
.approach-copy p{font-size:15px;line-height:2.1;color:var(--green-soft);max-width:540px;margin:28px 0 36px}

/* ---------- 浅灰散落卡片区 ---------- */
.scenes{background:var(--paper);color:var(--ink);padding:clamp(90px,11vw,150px) var(--gutter) clamp(100px,12vw,160px)}
.scenes-head{display:flex;flex-direction:column;align-items:center;gap:40px;text-align:center}
.scenes-head h2{font-size:clamp(38px,5.6vw,78px);font-weight:800;letter-spacing:-2.5px;line-height:1.2}
.scenes-cloud{position:relative;height:clamp(380px,38vw,520px);margin-top:clamp(50px,6vw,80px)}
.float-card{position:absolute;width:clamp(150px,17vw,240px);border-radius:16px;overflow:hidden;box-shadow:0 18px 50px #00000026;will-change:transform}
.float-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.fc1{top:2%;left:4%;transform:rotate(-4deg)}
.fc2{top:0;left:36%;transform:rotate(2.5deg)}
.fc3{top:8%;right:5%;transform:rotate(-2deg)}
.fc4{bottom:12%;left:13%;transform:rotate(3deg)}
.fc5{bottom:4%;left:41%;transform:rotate(-3deg)}
.fc6{bottom:16%;right:11%;transform:rotate(4deg)}

/* ---------- 案例卡与标准卡 ---------- */
.capability{background:var(--white);color:var(--ink);padding:clamp(50px,6vw,80px) 0 clamp(90px,10vw,130px)}
.case-row{display:flex;gap:20px;overflow-x:auto;padding:10px var(--gutter) 26px;scroll-snap-type:x mandatory;scrollbar-width:none}
.case-row::-webkit-scrollbar{display:none}
.case-card{flex:0 0 clamp(260px,26vw,320px);scroll-snap-align:start;background:var(--card);border-radius:var(--r);padding:28px 28px 24px;display:flex;flex-direction:column;gap:16px;min-height:300px}
.case-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:#E0DBCE}
.case-card h3{font-size:20px;font-weight:700;letter-spacing:-.3px}
.case-card p{font-size:14px;line-height:1.95;color:var(--gray)}
.case-foot{margin-top:auto;color:var(--gray-2);font-size:9px}
.case-nav{display:flex;justify-content:flex-end;gap:12px;padding:0 var(--gutter)}
.round-btn{display:grid;place-items:center;width:46px;height:46px;border:1px solid #C9C4B6;border-radius:50%;font-size:16px;color:var(--ink);background:#F6F4EF;transition:border-color .25s,background .25s}
.round-btn:hover{border-color:var(--ink);background:#EAE6DB}
.case-statement{padding:clamp(70px,8vw,110px) var(--gutter) 0;font-size:clamp(30px,3.8vw,54px);font-weight:800;letter-spacing:-1.8px;line-height:1.3}
.standards{padding:clamp(80px,9vw,120px) var(--gutter) 0}
.standards-title{font-size:clamp(28px,3.4vw,46px);font-weight:800;letter-spacing:-1.5px;line-height:1.35;max-width:900px}
.standard-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:clamp(40px,5vw,60px)}
.standard-card{background:var(--card);border-radius:var(--r);padding:34px 32px 30px;display:flex;flex-direction:column;gap:18px}
.standard-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#E0DBCE}
.standard-card h4{font-size:21px;font-weight:700;letter-spacing:-.3px}
.standard-card p{font-size:14px;line-height:1.95;color:var(--gray)}
.standard-card .pill{margin-top:auto;align-self:flex-start}

/* ---------- 资源 masonry ---------- */
.research{background:#E9E5D9;color:var(--ink);padding:clamp(60px,7vw,90px) var(--gutter) clamp(90px,10vw,130px)}
.research-grid{display:grid;grid-template-columns:1fr 1fr 1fr;grid-template-rows:300px 240px;gap:20px}
.tile{border-radius:var(--r);overflow:hidden;position:relative;display:flex;flex-direction:column;justify-content:space-between;padding:30px}
.tile-lab{grid-column:1;grid-row:1;background:var(--card)}
.tile-collab{grid-column:1;grid-row:2;background:#6E6E73;color:#F6F4EF}
.tile-feature{grid-column:2/4;grid-row:1;background:var(--green);color:#F6F4EF}
.tile-photo{grid-row:2;padding:0}
.tile-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.tile-photo .tile-caption{position:absolute;left:18px;bottom:14px;color:#F6F4EF;font-size:13px;font-weight:600;text-shadow:0 1px 12px #000000a6;z-index:1}
.tile-photo:after{content:"";position:absolute;inset:auto 0 0;height:45%;background:linear-gradient(0deg,#0000008c,transparent)}
.tile-mark{display:block}
.tile-name{font-size:15px;font-weight:700;letter-spacing:2px;margin-top:14px}
.tile-title{font-size:clamp(22px,2.2vw,32px);font-weight:800;letter-spacing:-1px;line-height:1.3}
.tile-mono{color:#F6F4EFA6}
.tile-pair{display:flex;align-items:center;gap:14px}
.tile-x{font-size:20px;font-weight:300;opacity:.7}
.tile-partner{font-size:clamp(18px,1.8vw,24px);font-weight:700;letter-spacing:.5px}

/* ---------- 行动区 ---------- */
.contact{background:var(--black);padding:clamp(100px,12vw,160px) var(--gutter) clamp(110px,13vw,170px)}
.contact-inner{max-width:920px}
.contact-tag{display:block;color:#F6F4EF73;margin-bottom:30px}
.contact h2{font-size:clamp(36px,4.8vw,70px);font-weight:800;letter-spacing:-2.5px;line-height:1.26}
.contact p{font-size:15px;line-height:2.1;color:#A6A6AB;margin:32px 0 44px}

/* ---------- 页脚 ---------- */
.footer{background:var(--black);padding:0 var(--gutter) 44px}
.footer-links{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;padding:clamp(70px,8vw,100px) 0 clamp(50px,6vw,70px);border-bottom:1px solid var(--line)}
.footer-links h5{font-size:11px;font-weight:600;letter-spacing:1px;color:#8E8E93;margin-bottom:20px}
.footer-links a{display:block;font-size:13px;color:#B4B0A6;padding:6px 0;transition:color .25s}
.footer-links a:hover{color:#F6F4EF}
.footer-wordmark{font-size:clamp(50px,9.2vw,150px);font-weight:800;letter-spacing:-3.5px;line-height:1.04;padding:clamp(46px,6vw,80px) 0 clamp(50px,6vw,70px)}
.footer-base{display:flex;align-items:flex-end;justify-content:space-between;gap:30px}
.footer-social{display:flex;gap:12px}
.social-circle{display:grid;place-items:center;width:44px;height:44px;border:1px solid #F6F4EF3D;border-radius:50%;font-size:13px;color:#C9C4B6;transition:border-color .25s,color .25s}
.social-circle:hover{border-color:#F6F4EF;color:#F6F4EF}
.footer-legal{display:flex;flex-direction:column;align-items:flex-end;gap:10px;font-size:12px;color:#6E6E73;text-align:right}

/* ---------- 胶囊按钮 ---------- */
.pill{display:inline-flex;align-items:center;gap:12px;border-radius:999px;padding:15px 30px;font-size:14px;font-weight:600;transition:transform .25s var(--ease),background .25s,border-color .25s;white-space:nowrap}
.pill span{transition:transform .25s var(--ease)}
.pill:hover span{transform:translateX(4px)}
.pill-light{background:#F6F4EF1F;border:1px solid #F6F4EF47;color:#F6F4EF}
.pill-light:hover{background:#F6F4EF2E}
.pill-white{background:var(--white);color:var(--black)}
.pill-white:hover{transform:translateY(-2px)}
.pill-dark{background:var(--ink);color:#F6F4EF}
.pill-dark:hover{transform:translateY(-2px)}
.pill-gray{background:var(--white);border:1px solid #C9C4B6;color:var(--ink);padding:11px 22px;font-size:13px}
.pill-gray:hover{border-color:var(--ink)}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(30px)}
.reveal.in{opacity:1;transform:none;transition:opacity .85s var(--ease),transform .85s var(--ease)}

/* ---------- 需求清单弹窗 ---------- */
dialog{border:0;padding:0;background:transparent}
dialog::backdrop{background:#000000e0;backdrop-filter:blur(10px)}
#brief-dialog{width:min(640px,calc(100% - 36px));background:var(--white);color:var(--ink);border-radius:var(--r);padding:32px 36px;max-height:92dvh;overflow-y:auto}
.dialog-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.dialog-top .mono{color:#8E8E93}
.close-dialog{font-size:26px;line-height:1;padding:0 4px;color:#3A3A40;transition:transform .25s}
.close-dialog:hover{transform:rotate(90deg)}
#brief-title{font-size:27px;font-weight:700;letter-spacing:-.8px}
.dialog-description{font-size:13px;line-height:1.9;color:#6E6E73;margin:14px 0 26px}
form label{display:block;font-size:12px;font-weight:600;margin-bottom:18px}
form input,form select,form textarea{display:block;width:100%;background:#FBFAF5;border:1px solid #DED9CC;border-radius:10px;padding:11px 14px;font-size:14px;margin-top:9px;line-height:1.6;transition:border-color .2s,background .2s}
form input:focus,form select:focus,form textarea:focus{outline:none;border-color:#8E8E93;background:#F6F4EF}
form textarea{resize:vertical;min-height:66px}
form input::placeholder,form textarea::placeholder{color:#9A9A9F}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:6px}
.button-dark{background:var(--ink);color:#F6F4EF;border-radius:999px;padding:13px 26px;font-size:13px;font-weight:600;display:inline-flex;align-items:center;gap:16px;transition:background .25s}
.button-dark:hover{background:#26262E}
.button-outline{border:1px solid #C9C4B6;border-radius:999px;padding:13px 24px;font-size:13px;font-weight:600;transition:border-color .25s,background .25s}
.button-outline:hover{border-color:var(--ink);background:#EAE6DB}
.form-status{font-size:12px;line-height:1.8;color:#17171C;min-height:20px;margin-top:14px}

/* ---------- 响应式 ---------- */
@media(max-width:1020px){
  .field{height:auto}
  .field-inner{position:static;min-height:0;grid-template-columns:1fr;gap:48px;padding:90px var(--gutter)}
  .field-copy p{max-width:none}
  .field-stage{height:400px;perspective:none}
  .panel-2,.panel-3{display:none}
  .panel-1{width:100%}
  .panel-wire{width:100%}
  .approach-card{grid-template-columns:1fr}
  .approach-pip{max-width:420px}
  .standard-cards{grid-template-columns:1fr}
  .research-grid{grid-template-columns:1fr;grid-template-rows:auto}
  .tile-lab,.tile-collab,.tile-feature,.tile-photo{grid-column:1;grid-row:auto;min-height:240px}
  .footer-links{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:900px){
  .nav{display:none;position:absolute;top:76px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:6px;background:#000000f2;backdrop-filter:blur(14px);padding:22px 30px 30px;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .nav a{font-size:15px;padding:10px 0}
  .menu-toggle{display:flex}
  .header-cta{display:none}
  .scenes-cloud{height:auto;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:44px}
  .float-card{position:static;width:auto;transform:none!important}
}
@media(max-width:680px){
  :root{--gutter:16px}
  .hero{padding-top:86px}
  .hero-card{height:56vh;min-height:380px}
  .hero-copy{padding:0 7vw}
  .case-card{flex:0 0 82%}
  .research-grid{grid-template-columns:1fr}
  .tile-lab,.tile-collab,.tile-feature,.tile-photo{grid-column:1}
  .footer-links{grid-template-columns:1fr 1fr;gap:34px 20px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:22px}
  .footer-legal{align-items:flex-start;text-align:left}
  #brief-dialog{padding:24px 22px}
  .form-grid{grid-template-columns:1fr}
  .form-actions{flex-direction:column-reverse}
  .form-actions button{width:100%;justify-content:center}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .field-stage,.panel,.approach-card,.float-card,.hero-card{transform:none!important}
  .field-inner{position:static}
}

/* ============================================================
   品牌构件 · 拾界 BI
   ============================================================ */
/* 字标西文用 Jura（标题字标），回退到中文黑体 */
.brand small,.footer-brand .mono{font-family:var(--display)}
.footer-brand{display:inline-flex;align-items:center;gap:13px}
.footer-brand-mark{flex:none}
.footer-brand-text{display:flex;flex-direction:column;line-height:1.05}

/* kicker 朱红短道：品牌铁律——红色只出现在数据构件与 kicker 短道 */
.section-kicker,.opening-field-copy .kicker,.approach-tag,.contact-tag,.opening-eyebrow,.sample-top .mono{display:inline-block}
.section-kicker::before,.opening-field-copy .kicker::before,.approach-tag::before,.contact-tag::before,.opening-eyebrow::before,.sample-top .mono::before{content:"";display:inline-block;width:15px;height:3px;background:var(--accent);vertical-align:middle;margin-right:10px;transform:translateY(-1px)}

/* 大标记母题：圆是界，缺口是门——行动区/页脚的淡印背景 */
.mark-motif{position:absolute;pointer-events:none;user-select:none;opacity:.055;z-index:0}
.mark-motif svg{display:block;width:100%;height:100%}
.contact-inner{position:relative;z-index:1}
.contact .next-task{position:relative;z-index:1}