/* ============================================================
   布嘎官网 · 设计系统 K
   白纸 + 墨绿 + 黄铜；硬边、细线、字当图；不用圆角卡片堆叠
   ============================================================ */
:root{
  --bg:#F3F5F2; --paper:#FFFFFF; --ink:#14201C; --dim:#5E6B66; --line:#D9DFD9;
  --acc:#17604F; --acc-soft:#E7F1EC; --acc-line:#9CC8B8; --brass:#B98F3E;
  --dark:#101A16; --dark-line:#2A3A33;
  --sans:"NotoSC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Cascadia Mono",Consolas,"Microsoft YaHei",monospace;
  --max:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%}
::selection{background:rgba(23,96,79,.18)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 40px}
@media (max-width:640px){ .wrap{padding:0 18px} }

/* 底纹 + 光标光斑 */
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(rgba(20,32,28,.13) .9px,transparent 1px);
  background-size:7px 7px;opacity:.45}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(680px circle at var(--mx,72%) var(--my,24%),rgba(23,96,79,.09),transparent 62%)}
main,header,footer{position:relative;z-index:1}

/* ---------- 顶栏 ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(243,245,242,.88);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
header.scrolled{box-shadow:0 10px 30px -22px rgba(20,32,28,.5)}
.nav{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;
  letter-spacing:.2em;text-transform:uppercase}
.logo b{background:var(--ink);color:#fff;padding:3px 7px;font-weight:700}
.logo em{font-style:normal;color:var(--dim);letter-spacing:.08em}
.nav a.link{font-size:13.5px;color:#45524C;letter-spacing:.02em;transition:color .18s}
.nav a.link:hover{color:var(--acc)}
.nav .spacer{flex:1}
.btn{display:inline-flex;align-items:center;gap:9px;padding:10px 18px;font-size:13.5px;
  font-weight:700;letter-spacing:.02em;border:1px solid transparent;transition:.16s;cursor:pointer}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--acc);transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.btn-ghost{border-color:#BFC9C2;color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--ink);background:#fff}
.nav-toggle{display:none;background:transparent;border:1px solid #BFC9C2;color:var(--ink);
  padding:6px 11px;font-size:15px;cursor:pointer}

/* ---------- 首屏 ---------- */
.hero{position:relative;padding:56px 0 0;display:grid;grid-template-columns:minmax(0,1fr) 470px;
  gap:0 56px;align-items:start}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--acc);margin:0 0 22px}
.hero h1{font-size:clamp(50px,6.6vw,96px);line-height:1.0;letter-spacing:-.02em;margin:0;font-weight:700}
.hero h1 .outline{color:transparent;-webkit-text-stroke:2px var(--ink)}
.slash{display:inline-block;margin:16px 0 0 -4px;background:var(--acc);color:#fff;
  padding:8px 26px 12px 20px;font-weight:700;font-size:clamp(26px,3vw,42px);
  clip-path:polygon(0 0,100% 0,calc(100% - 22px) 100%,0 100%);transform:rotate(-1deg)}
.lead{max-width:30em;margin:28px 0 0;font-size:16px;line-height:1.9;color:#39463F}
.lead b{font-weight:700;background:linear-gradient(transparent 64%,rgba(23,96,79,.20) 64%)}
kbd{font-family:var(--mono);font-size:12.5px;border:1px solid #B9C4BD;border-bottom-width:2px;
  padding:2px 6px;margin:0 1px;background:#fff;color:var(--ink)}
.cta{display:flex;align-items:center;gap:22px;margin:30px 0 0;flex-wrap:wrap}
.btn-big{display:inline-flex;align-items:center;gap:12px;padding:16px 26px;background:var(--ink);
  color:#fff;font-weight:700;font-size:17px;transition:.16s}
.btn-big:hover{background:var(--acc);transform:translate(-3px,-3px);box-shadow:6px 6px 0 var(--ink)}
.link-small{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--dim);
  border-bottom:2px solid var(--brass);padding-bottom:3px}
.link-small:hover{color:var(--acc)}
.spec{display:flex;gap:26px;margin:30px 0 0;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.08em;color:var(--dim);flex-wrap:wrap}
.spec i{font-style:normal;color:var(--ink);font-family:var(--sans);font-weight:700;letter-spacing:0}

/* 首屏右侧：桌面角 + 放大镜 + 1:1 */
.evidence{position:relative;padding-top:6px}
.spill{position:absolute;right:-90px;top:-70px;width:360px;height:300px;pointer-events:none;
  background:radial-gradient(closest-side,rgba(28,150,105,.28),rgba(28,150,105,0) 70%);
  filter:blur(14px);mix-blend-mode:multiply;z-index:0}
.screen{position:relative;height:296px;z-index:1;
  background:radial-gradient(120% 90% at 78% 18%,#17231D 0%,#0A0F0C 58%,#070B09 100%)}
.skin{position:absolute;inset:0;overflow:hidden}
.skin::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.10) .8px,transparent 1px);
  background-size:5px 5px;opacity:.5}
.icons{position:absolute;left:22px;top:20px;display:flex;flex-direction:column;gap:18px}
.icons span{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:#8C9C93;
  display:flex;align-items:center;gap:7px}
.icons i{width:14px;height:14px;border:1px solid #4A5A51;display:inline-block}
.orb-real{position:absolute;right:64px;top:52px;width:26px;height:26px;border-radius:50%;
  background:radial-gradient(circle at 36% 30%,#FFFFFF 0%,#E6FFF2 12%,#7CF0B4 40%,#31C685 66%,#12724F 100%);
  box-shadow:0 0 16px 2px rgba(49,198,133,.55),0 0 46px 6px rgba(23,96,79,.35)}
.measure{position:absolute;right:50px;top:38px;width:54px;height:54px;border:1px dashed rgba(160,235,200,.55)}
.measure::after{content:"26 px";position:absolute;right:58px;top:-4px;font-family:var(--mono);
  font-size:10px;letter-spacing:.1em;color:#A9C4B8;white-space:nowrap}
.bar{position:absolute;left:0;right:0;bottom:0;height:30px;background:rgba(255,255,255,.04);
  border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:9px;padding:0 14px}
.bar i{width:13px;height:13px;background:rgba(255,255,255,.16)}
.bar i.on{background:#2FD08A}
/* 说话瞬间：波形 + 指令 */
.say{position:absolute;left:152px;bottom:48px;display:flex;align-items:center;gap:11px;
  padding:8px 14px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14)}
.say .wave{display:flex;align-items:center;gap:2px;height:14px}
.say .wave i{width:2px;height:6px;background:#2FD08A;animation:wave 1s ease-in-out infinite}
.say .wave i:nth-child(2){animation-delay:.12s}
.say .wave i:nth-child(3){animation-delay:.24s}
.say .wave i:nth-child(4){animation-delay:.36s}
.say .wave i:nth-child(5){animation-delay:.48s}
@keyframes wave{0%,100%{height:5px}50%{height:13px}}
.say .txt{font-size:12px;letter-spacing:.02em;color:#D7E6DE}
.bar .clock{margin-left:auto;font-family:var(--mono);font-size:9.5px;color:#7E8E85}
.lens{position:absolute;left:-24px;top:206px;width:132px;height:132px;border-radius:50%;z-index:3;
  background:radial-gradient(circle at 42% 36%,#101814 0%,#070B09 70%);
  border:3px solid var(--ink);box-shadow:0 22px 50px -18px rgba(20,32,28,.55);overflow:hidden}
.lens::before{content:"";position:absolute;left:50%;top:50%;width:78px;height:78px;margin:-39px 0 0 -39px;
  border-radius:50%;background:radial-gradient(circle at 34% 28%,#FFFFFF 0%,#EAFFF4 9%,#8CF3C2 36%,#34CC8B 64%,#0F6B4A 100%);
  box-shadow:0 0 36px 5px rgba(52,204,139,.45),inset -8px -11px 24px rgba(4,28,18,.55)}
.lens::after{content:"6×";position:absolute;left:50%;bottom:8px;transform:translateX(-50%);
  font-family:var(--mono);font-size:9px;letter-spacing:.14em;color:#8FB3A5}
.lens-cap{position:absolute;left:-24px;top:344px;width:132px;text-align:center;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;color:var(--dim);z-index:3}
.result{margin:16px 0 0 128px;display:flex;align-items:center;gap:14px;border:1px solid #C9D1CB;
  background:#fff;padding:13px 16px;box-shadow:5px 5px 0 rgba(20,32,28,.06)}
.result .dot{width:8px;height:8px;background:#2FD08A;flex:none}
.result b{font-size:13px;letter-spacing:.04em}
.result span{font-size:13px;color:#39463F}
.result em{margin-left:auto;font-family:var(--mono);font-style:normal;font-size:12px;color:var(--acc)}
.data{margin-top:22px;border-top:3px solid var(--ink);display:grid;grid-template-columns:repeat(4,1fr)}
.data div{padding:14px 0 12px;border-right:1px solid #C9D1CB}
.data div:last-child{border-right:0}
.data b{display:block;font-weight:700;font-size:26px;letter-spacing:-.02em;line-height:1}
.data span{display:block;margin-top:7px;font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--dim)}

/* 首屏底部黑条 */
.band{display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;margin:36px 0 0;
  padding:14px 40px;background:var(--ink);color:#EDF2EF;
  clip-path:polygon(0 24%,100% 0,100% 100%,0 100%)}
.band span{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:#B7C4BE}
.band b{color:#fff}
.band .right{margin-left:auto}

/* ---------- 区块通用 ---------- */
section{padding:88px 0;border-top:1px solid var(--line);position:relative}
section.dark{background:var(--dark);color:#EDF2EF;border-top:0}
section.dark .sec-tag{color:#7FE8B6}
section.dark .sub{color:#A9BDB5}
section.dark h2{color:#fff}
.sec-head{margin-bottom:40px;max-width:52em}
.sec-tag{font-family:var(--mono);font-size:11px;letter-spacing:.24em;color:var(--acc);margin-bottom:12px}
h2{font-size:clamp(28px,3.1vw,40px);line-height:1.18;letter-spacing:-.02em;margin:0 0 10px;font-weight:700}
h3{font-weight:700}
.sub{color:var(--dim);font-size:15px;margin:0}
.note{font-size:12.5px;color:var(--dim);margin-top:22px;line-height:1.8}
.note a{color:var(--acc);border-bottom:1px dotted var(--acc-line)}
.note b{color:var(--ink)}

/* ---------- 功能：编号细线列表 ---------- */
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px;border-top:3px solid var(--ink)}
.feat > div{padding:20px 0 18px;border-bottom:1px solid #CFD7D0;display:block}
.feat .num{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--acc);margin-bottom:8px}
.feat h3{font-size:16.5px;margin:0 0 5px;letter-spacing:-.01em}
.feat p{margin:0;font-size:13.5px;color:var(--dim);line-height:1.7}

/* ---------- 形态 ---------- */
.forms{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.fbox{border:1px solid #C9D1CB;background:#fff;padding:0;display:flex;flex-direction:column}
.fbox .stage{height:140px;background:var(--dark);display:grid;place-items:center;position:relative;overflow:hidden}
.fbox .stage::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.10) .8px,transparent 1px);background-size:5px 5px;opacity:.5}
.fbox .cap{padding:18px 20px 20px;border-top:3px solid var(--ink)}
.fbox .cap .name{font-weight:700;font-size:17px;display:flex;align-items:baseline;gap:10px}
.fbox .cap .name em{font-family:var(--mono);font-style:normal;font-size:10.5px;letter-spacing:.14em;color:var(--dim)}
.fbox .cap .desc{font-size:13px;color:var(--dim);margin-top:4px}
.p-orb{width:64px;height:64px;border-radius:50%;position:relative;z-index:1;
  background:radial-gradient(circle at 36% 30%,#FFFFFF 0%,#E6FFF2 12%,#7CF0B4 40%,#31C685 66%,#12724F 100%);
  box-shadow:0 0 30px 4px rgba(49,198,133,.45)}
.p-panel{width:180px;border:1px solid #33463D;background:#0C1411;padding:10px;position:relative;z-index:1}
.p-panel .pb{display:flex;justify-content:space-between;font-family:var(--mono);font-size:8.5px;
  color:#6F857B;margin-bottom:8px;letter-spacing:.06em}
.p-panel .pf{height:14px;background:#16211C;margin-bottom:6px}
.p-panel .pbtns{display:flex;gap:5px}
.p-panel .pbtns i{flex:1;height:12px;background:#1E2C26;display:block}
.p-fold{width:180px;height:30px;border:1px solid #33463D;background:#0C1411;display:flex;
  align-items:center;gap:7px;padding:0 10px;position:relative;z-index:1}
.p-fold .ln{height:8px;flex:1;background:#16211C}
.p-fold .pd{width:7px;height:7px;border-radius:50%;background:#2FD08A}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px;border-top:3px solid var(--ink)}
.step{padding:22px 0 20px;border-bottom:1px solid #CFD7D0}
.step .n{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--acc)}
.step h3{font-size:19px;margin:10px 0 6px;letter-spacing:-.01em}
.step p{margin:0;font-size:13.5px;color:var(--dim)}

/* ---------- 打字演示 ---------- */
.demo{background:var(--dark);color:#EDF2EF;padding:28px 30px;display:flex;
  align-items:center;gap:16px;flex-wrap:wrap;border-left:3px solid #2FD08A}
.demo .label{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:#8FB3A5}
.demo code{font-family:var(--mono);font-size:16px;color:#8CF3C2}
.caret{display:inline-block;width:2px;height:17px;background:#8CF3C2;vertical-align:-3px;
  animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.demo .ans{width:100%;font-size:13.5px;color:#A9BDB5;border-top:1px solid #2A3A33;padding-top:14px;margin-top:4px}

/* ---------- 选模型 ---------- */
.picker{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:0 0 22px}
.picker label{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--dim)}
.picker input{background:#fff;border:1px solid #BFC9C2;padding:10px 13px;font:inherit;font-size:14px;
  color:var(--ink);min-width:260px}
.picker input:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(23,96,79,.12)}
.pick-hint{font-family:var(--mono);font-size:12px;color:var(--acc);letter-spacing:.06em}
.table-wrap{overflow-x:auto;border-top:3px solid var(--ink)}
.model-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:720px}
.model-table th{background:var(--dark);color:#CFE3DA;font-family:var(--mono);font-size:11px;
  letter-spacing:.12em;text-align:left;padding:12px 14px;font-weight:400}
.model-table td{border-bottom:1px solid #CFD7D0;padding:12px 14px;vertical-align:top}
.model-table .tier{font-weight:700}
.model-table .m{font-family:var(--mono);font-size:12.5px;color:var(--acc)}
.model-table .s{color:var(--dim);font-family:var(--mono);font-size:12px}
.model-table tr.hit td{background:var(--acc-soft)}
.model-table tr.hit td:first-child{box-shadow:inset 3px 0 0 var(--acc)}

/* ---------- 下载 ---------- */
.dl{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.dl .box{border:3px solid var(--ink);background:#fff;padding:26px;display:flex;flex-direction:column;gap:8px}
.dl .box.alt{background:var(--dark);border-color:var(--dark);color:#EDF2EF}
.dl .box.alt .size{color:#A9BDB5}
.dl .box.alt p{color:#A9BDB5}
.dl .box .tag{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--acc)}
.dl .box.alt .tag{color:#7FE8B6}
.dl .rec{display:inline-block;margin-left:10px;padding:2px 8px;background:#2FD08A;color:#06231A;
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;vertical-align:2px}
.dl h3{font-size:21px;margin:2px 0 0;letter-spacing:-.01em}
.dl .size{font-family:var(--mono);font-size:13px;letter-spacing:.02em;color:#5F6B66}
.dl .box.alt .size{color:#B9CEC2}
.dl p{margin:4px 0 14px;font-size:13.5px;color:var(--dim)}
.dl .btn{margin-top:auto;align-self:stretch}
.dl .btn-big,.dl .btn-second{width:100%;justify-content:center}
.dl .box.alt .btn-big{background:#fff;color:var(--ink)}
.dl .box.alt .btn-big:hover{background:#8CF3C2;box-shadow:6px 6px 0 #2FD08A}
.btn-second{display:inline-flex;align-items:center;gap:10px;padding:14px 24px;border:1px solid var(--ink);
  background:transparent;color:var(--ink);font-size:15px;font-weight:700;transition:.16s}
.btn-second:hover{background:var(--ink);color:#fff}
.warn-strip{margin-top:22px;border-left:3px solid var(--brass);background:#FBF6EA;padding:14px 18px;
  font-size:13px;color:#5A4A22;line-height:1.8}
.warn-strip b{color:#3A2F12}

/* ---------- Key ---------- */
.prov{border-top:3px solid var(--ink)}
.prov a{display:flex;align-items:center;gap:18px;padding:16px 0;border-bottom:1px solid #CFD7D0;
  transition:background .16s,padding-left .16s}
.prov a:hover{background:#fff;padding-left:10px}
.prov .n{width:150px;font-weight:700;font-size:15px;flex:none}
.prov .t{flex:1;color:var(--dim);font-size:13.5px}
.prov .go{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--acc)}

/* ---------- FAQ ---------- */
details{border-bottom:1px solid #CFD7D0;padding:16px 2px}
details summary{list-style:none;cursor:pointer;font-size:15.5px;font-weight:700;
  display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";font-family:var(--mono);color:var(--acc);font-weight:400;
  font-size:18px;line-height:1;flex:none}
details[open] summary::after{content:"–"}
details p{margin:12px 0 4px;font-size:13.5px;color:var(--dim);line-height:1.85;max-width:58em}

/* ---------- 反馈表单 ---------- */
form#fb-form{display:grid;gap:14px;max-width:600px}
form#fb-form label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--dim)}
form#fb-form input,form#fb-form select,form#fb-form textarea{
  width:100%;background:#fff;border:1px solid #BFC9C2;padding:12px 13px;font:inherit;font-size:14px;
  color:var(--ink);transition:border-color .16s,box-shadow .16s}
form#fb-form input:focus,form#fb-form select:focus,form#fb-form textarea:focus{
  outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(23,96,79,.12)}
form#fb-form textarea{min-height:110px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* ---------- 收尾带 ---------- */
.closing{position:relative;z-index:1;background:var(--dark);color:#EDF2EF;padding:72px 0 64px;border-top:0}
.closing .wrap{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap}
.closing h2{color:#fff;font-size:clamp(32px,4vw,54px);line-height:1.1;margin:0;letter-spacing:-.02em}
.closing .kicker{color:#7FE8B6;margin-bottom:14px}
.closing .right{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.closing .btn-big{background:#fff;color:var(--ink)}
.closing .btn-big:hover{background:#8CF3C2;box-shadow:6px 6px 0 #2FD08A}
.closing .note{margin:0;color:#93A89F;font-family:var(--mono);font-size:11.5px;letter-spacing:.06em}

/* ---------- 页脚 ---------- */
footer{background:var(--dark);color:#A9BDB5;padding:40px 0;border-top:0}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-family:var(--mono);
  font-size:11.5px;letter-spacing:.06em}
.foot a{color:#CFE3DA}
.foot a:hover{color:#8CF3C2}
.foot b{color:#8CF3C2;font-weight:400}

/* ---------- 回到顶部 ---------- */
#toTop{position:fixed;right:24px;bottom:28px;width:44px;height:44px;background:#fff;
  border:1px solid var(--ink);color:var(--ink);font-size:17px;cursor:pointer;opacity:0;
  pointer-events:none;transform:translateY(8px);transition:.25s;z-index:60}
#toTop.show{opacity:1;pointer-events:auto;transform:none}
#toTop:hover{background:var(--ink);color:#fff}

/* ---------- 出现动画 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
html.static .reveal{opacity:1!important;transform:none!important;transition:none!important}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero{grid-template-columns:1fr;gap:44px}
  .lens,.lens-cap{display:none}
  .result{margin-left:0}
  .feat{grid-template-columns:1fr}
  .forms,.steps,.dl{grid-template-columns:1fr}
  .data{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .nav a.link{display:none}
  .nav-toggle{display:block}
  .nav.open{flex-wrap:wrap;height:auto;padding:10px 0}
  .nav.open a.link{display:block;width:100%;padding:9px 2px;border-top:1px solid var(--line)}
  .nav.open .spacer{display:none}
  h2{font-size:28px}
  section{padding:60px 0}
  .band{padding:18px 20px;clip-path:none}
  .hero{padding-top:34px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}