*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#14161B;--ink2:#39404B;--muted:#6A7180;--faint:#9BA2AD;
  --line:#E5E7EC;--line2:#EFF1F4;
  --bg:#FFFFFF;--soft:#F7F8FA;--tint:#F2F5FA;
  --panel:#0F1218;--panel2:#161A22;
  --blue:#0060E0;--green:#008030;--red:#C00010;--amber:#A8620A;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --mono:"Cascadia Mono","JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --r-s:6px;--r-m:12px;--r-l:18px;--r-xl:26px;
  --sh1:0 1px 2px rgba(20,22,27,.04),0 10px 26px -14px rgba(20,22,27,.14);
  --sh2:0 30px 70px -34px rgba(20,22,27,.34);
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1240px;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:3px}
::selection{background:#CFE0FF;color:var(--ink)}
.wrap{width:min(100% - 44px,var(--maxw));margin-inline:auto}
.n{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.022em;line-height:1.16}
p{margin:0}
.lead{font-size:17px;line-height:1.8;color:var(--ink2)}

/* ---------- 通用 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.5}
.sec{padding:clamp(66px,6.2vw,106px) 0;position:relative}
.sec--soft{background:var(--soft);border-block:1px solid var(--line2)}
.sec-head{max-width:760px;margin-bottom:clamp(38px,5vw,62px)}
.sec-head h2{font-size:clamp(1.72rem,3.3vw,2.65rem);margin:16px 0 18px;letter-spacing:-.03em}
.sec-head .lead{max-width:62ch}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:100px;font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .22s var(--ease),background .22s,border-color .22s,box-shadow .22s;
  white-space:nowrap;border:1px solid transparent}
.btn:active{transform:scale(.975)}
.btn--p{background:var(--ink);color:#fff}
.btn--p:hover{background:#000;box-shadow:0 12px 30px -14px rgba(20,22,27,.6)}
.btn--g{border-color:var(--line);background:#fff;color:var(--ink)}
.btn--g:hover{border-color:#C9CDD6;background:#FCFCFD}
.btn svg{width:15px;height:15px;flex:none}
.tag{display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:100px;
  border:1px solid var(--line);background:#fff;font-size:12.5px;font-weight:500;color:var(--ink2)}
.dot{width:6px;height:6px;border-radius:50%;flex:none}

/* 入场 */
.rv{opacity:0;transform:translateY(20px);
  transition:opacity .78s var(--ease),transform .78s var(--ease);transition-delay:var(--d,0ms)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1!important;transform:none!important;transition:none!important}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

/* ---------- 顶栏 ---------- */
.strip{background:var(--ink);color:#E7E9ED;font-size:12.5px;letter-spacing:.01em}
.strip .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px}
.strip a{color:#fff;font-weight:600;border-bottom:1px solid rgba(255,255,255,.32);padding-bottom:1px}
.strip .l{display:flex;align-items:center;gap:9px;min-width:0}
.strip .l span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.strip .r{display:none;gap:22px;align-items:center}
@media(min-width:820px){.strip .r{display:flex}}

.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.stuck{border-bottom-color:var(--line);box-shadow:0 6px 24px -20px rgba(20,22,27,.5)}
.nav .wrap{display:flex;align-items:center;gap:14px;min-height:68px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand svg{width:34px;height:34px;flex:none}
.brand .bt{display:flex;flex-direction:column;line-height:1.06}
.brand .bt b{font-size:16px;font-weight:700;letter-spacing:-.02em}
.brand .bt i{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.22em}
.navlinks{display:none;margin-left:auto;gap:30px}
@media(min-width:1000px){.navlinks{display:flex}}
.navlinks a{font-size:14.5px;font-weight:500;color:var(--ink2);position:relative;padding:6px 0}
.navlinks a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1.5px;
  background:var(--ink);transition:right .3s var(--ease)}
.navlinks a:hover{color:var(--ink)}
.navlinks a:hover::after{right:0}
.nav .cta{margin-left:auto}
@media(min-width:1000px){.nav .cta{margin-left:0}}
.nav .btn{padding:10px 20px;font-size:14px}
.burger{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);
  border-radius:10px;margin-left:auto}
@media(min-width:1000px){.burger{display:none}}
.mob{display:none;border-top:1px solid var(--line);background:#fff;padding:10px 0 20px}
.mob.open{display:block}
.nav .mob .wrap{display:block;min-height:0}
.mob a{display:block;padding:13px 0;font-size:16px;font-weight:500;border-bottom:1px solid var(--line2)}
.mob .btn{margin-top:18px;width:100%}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line2)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,var(--line2) 1px,transparent 1px),linear-gradient(var(--line2) 1px,transparent 1px);
  background-size:76px 76px;
  -webkit-mask-image:radial-gradient(120% 90% at 78% 22%,#000 0%,transparent 62%);
  mask-image:radial-gradient(120% 90% at 78% 22%,#000 0%,transparent 62%);opacity:.9}
.hero .wrap{position:relative}
.hero-main{display:grid;gap:clamp(32px,4vw,56px);
  padding:clamp(44px,5.6vw,82px) 0 clamp(36px,4vw,52px);align-items:center;
  min-height:clamp(540px,76dvh,740px);grid-template-columns:minmax(0,1fr)}
.hero-main > *{min-width:0}
@media(min-width:1040px){.hero-main{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}}
.hero-stats{padding-bottom:clamp(52px,6.4vw,86px)}
.hero-copy .eyebrow{flex-wrap:wrap;gap:4px 8px;letter-spacing:.035em;text-transform:none;line-height:1.7}
.hero-copy .eyebrow::before{display:none}
.hero-copy .eyebrow [lang]{letter-spacing:.015em}
.hero h1{font-size:clamp(2rem,4.5vw,3.75rem);letter-spacing:-.038em;line-height:1.2;margin:22px 0 0}
.hero h1 strong{color:var(--blue);font-weight:inherit;white-space:nowrap}
.hero .sub{margin-top:24px;max-width:52ch;font-size:clamp(16px,1.35vw,17.5px);color:var(--ink2);line-height:1.85}
.hero .sub strong{color:var(--ink);font-weight:600}
.hero-support{margin-top:12px;max-width:52ch;font-size:15px;color:var(--muted);line-height:1.85}
.hero-support strong{color:var(--ink);font-weight:700}
.hero .acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero .acts .btn--p{background:var(--blue)}
.hero .acts .btn--p:hover{background:#004FBA;box-shadow:none}
.hero .note{position:relative;padding-left:14px;margin-top:18px;font-size:13px;color:var(--muted);max-width:52ch;line-height:1.8}
.hero .note::before{content:"";position:absolute;left:0;top:.65em;width:6px;height:6px;border-radius:50%;background:var(--green)}
.hero .viz .frame{border-radius:var(--r-l);box-shadow:none}
.hero .viz img{object-fit:contain}
@media(max-width:1039px){.hero-main{min-height:0}.hero .viz{width:100%;max-width:720px;justify-self:center}}
@media(max-width:599px){
  .hero h1{font-size:clamp(1.75rem,8.5vw,2.6rem)}
  .hero .acts{gap:10px}
  .hero .acts .btn{flex:1 1 150px;padding:13px 12px;font-size:14px}
  .hero-support{font-size:14px}
}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}

/* 指标条 */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;margin-top:clamp(34px,4vw,46px)}
@media(min-width:640px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{background:#fff;padding:20px 18px}
.stat b{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.3rem,2.1vw,1.62rem);font-weight:700;letter-spacing:-.03em;line-height:1.1}
.stat b em{font-style:normal;font-size:.62em;font-weight:600;color:var(--muted);margin-left:3px}
.stat span{display:block;margin-top:7px;font-size:12.5px;color:var(--muted);line-height:1.5}

/* 产品视觉 */
.viz{position:relative}
.viz .frame{position:relative;border-radius:var(--r-xl);overflow:hidden;background:var(--soft);
  border:1px solid var(--line);box-shadow:var(--sh2)}
.viz img{width:100%;height:auto;aspect-ratio:1150/860;object-fit:cover}
.viz .glow{position:absolute;width:52%;aspect-ratio:1;border-radius:50%;pointer-events:none;
  left:8%;bottom:4%;filter:blur(46px);opacity:.5;
  background:radial-gradient(circle,rgba(0,96,224,.5),transparent 66%);
  animation:drift 13s ease-in-out infinite}
.viz .glow.g2{left:auto;right:4%;top:2%;bottom:auto;width:40%;
  background:radial-gradient(circle,rgba(192,0,16,.34),transparent 66%);animation-delay:-6.5s}
@keyframes drift{0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(6%,-7%,0) scale(1.1)}}

/* ---------- 跑马灯 ---------- */
.marq{border-block:1px solid var(--line2);background:#fff;overflow:hidden;padding:17px 0}
.marq-in{display:flex;width:max-content;animation:marq 42s linear infinite}
.marq:hover .marq-in{animation-play-state:paused}
@keyframes marq{to{transform:translate3d(-50%,0,0)}}
.marq-in > div{display:flex;align-items:center;gap:34px;padding-right:34px}
.marq span{display:flex;align-items:center;gap:11px;font-size:13.5px;color:var(--ink2);
  font-weight:500;white-space:nowrap}
.marq i{width:5px;height:5px;border-radius:50%;background:var(--faint);flex:none;font-style:normal}

/* ---------- 痛点 ---------- */
.pain{display:grid;border-top:1px solid var(--line)}
@media(min-width:900px){.pain{grid-template-columns:repeat(3,1fr)}}
.pain article{padding:32px 0 34px;border-bottom:1px solid var(--line)}
@media(min-width:900px){
  .pain article{border-bottom:0;padding:34px 34px 40px;border-right:1px solid var(--line)}
  .pain article:last-child{border-right:0;padding-right:0}
  .pain article:first-child{padding-left:0}
}
.pain .num{font-family:var(--mono);font-size:12px;color:var(--faint);letter-spacing:.16em}
.pain h3{margin:16px 0 12px;font-size:19.5px;letter-spacing:-.02em}
.pain .bad{font-size:14.5px;color:var(--muted);line-height:1.75}
.pain .fix{margin-top:20px;padding-top:18px;border-top:1px dashed var(--line);
  font-size:14.5px;line-height:1.8;color:var(--ink2)}
.pain .fix strong{color:var(--ink)}

/* ---------- 实拍带 ---------- */
.shots{display:grid;gap:clamp(16px,2.2vw,24px)}
@media(min-width:820px){.shots{grid-template-columns:1.15fr .85fr}}
.shot{position:relative;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);
  background:var(--soft);box-shadow:var(--sh1)}
.shot img{width:100%;height:clamp(320px,34vw,430px);object-fit:cover;
  transition:transform .8s var(--ease)}
@media(max-width:819px){.shot img{height:clamp(280px,62vw,400px)}}
.shot:hover img{transform:scale(1.035)}
.shot .cap{position:absolute;left:14px;bottom:14px;right:14px;
  background:rgba(255,255,255,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:12px;padding:12px 15px}
.shot .cap b{display:block;font-size:14.5px;font-weight:600}
.shot .cap span{display:block;font-size:12.5px;color:var(--muted);margin-top:3px;letter-spacing:.01em}

/* ---------- 核壳结构（暗色面板） ---------- */
.core{background:
   radial-gradient(120% 100% at 12% 0%,rgba(0,96,224,.16),transparent 55%),
   radial-gradient(90% 90% at 92% 100%,rgba(192,0,16,.13),transparent 58%),
   var(--panel);
  border-radius:var(--r-xl);padding:clamp(28px,4vw,54px);color:#EDEFF3;position:relative;overflow:hidden;
  box-shadow:var(--sh2)}
.core .dgrid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(45deg,rgba(255,255,255,.055) 1px,transparent 1px),
                   linear-gradient(-45deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:32px 32px;
  -webkit-mask-image:radial-gradient(80% 80% at 50% 50%,#000,transparent 78%);
  mask-image:radial-gradient(80% 80% at 50% 50%,#000,transparent 78%)}
.core-grid{position:relative;display:grid;gap:clamp(30px,4vw,52px);align-items:center}
@media(min-width:940px){.core-grid{grid-template-columns:.92fr 1.08fr}}
.core h2{color:#fff;font-size:clamp(1.6rem,3vw,2.35rem);margin:16px 0 16px;letter-spacing:-.03em}
.core .eyebrow{color:#9FB4D8}
.core .lead{color:#B9C0CC;max-width:56ch}
.core svg .layer{cursor:pointer;transition:opacity .35s var(--ease)}
.core svg .layer[data-dim="1"]{opacity:.32}
.laylist{margin-top:30px;display:grid;gap:1px;background:rgba(255,255,255,.1);border-radius:var(--r-m);overflow:hidden}
.lay{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;
  padding:15px 18px;background:rgba(255,255,255,.035);text-align:left;width:100%;
  transition:background .3s var(--ease),transform .3s var(--ease)}
.lay:hover{background:rgba(255,255,255,.075)}
.lay[aria-selected="true"]{background:rgba(255,255,255,.1)}
.lay .sw{width:10px;height:10px;border-radius:3px;flex:none}
.lay .t{font-size:14.5px;font-weight:600;color:#fff}
.lay .t small{display:block;font-weight:400;font-size:12.5px;color:#98A1B0;margin-top:3px;letter-spacing:.01em}
.lay .m{font-family:var(--mono);font-size:12.5px;color:#8E99AB;white-space:nowrap}

/* ---------- 光谱 ---------- */
.spec-wrap{display:grid;gap:clamp(28px,4vw,46px)}
@media(min-width:1000px){.spec-wrap{grid-template-columns:1.35fr .65fr}}
.chart{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  padding:20px 18px 12px;box-shadow:var(--sh1)}
.chart svg{width:100%;height:auto;display:block;overflow:visible}
.pick{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.pill{display:inline-flex;align-items:center;gap:9px;padding:9px 17px;border-radius:100px;
  border:1px solid var(--line);background:#fff;font-size:14px;font-weight:600;color:var(--ink2);
  transition:border-color .25s,background .25s,color .25s,transform .25s var(--ease)}
.pill:hover{transform:translateY(-1px);border-color:#C9CDD6}
.pill[aria-pressed="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.pill .sw{width:9px;height:9px;border-radius:50%;flex:none;transition:box-shadow .25s}
.pill[aria-pressed="true"] .sw{box-shadow:0 0 0 3px rgba(255,255,255,.22)}
.readout{background:var(--soft);border:1px solid var(--line);border-radius:var(--r-l);padding:24px 22px;
  position:relative;overflow:hidden}
.readout::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--wk,var(--blue));
  transition:background .4s var(--ease)}
.readout .rl{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600}
.readout .rv-big{font-family:var(--mono);font-size:clamp(2.2rem,4.4vw,3rem);font-weight:700;
  letter-spacing:-.045em;line-height:1;margin:12px 0 4px}
.readout .rv-big em{font-style:normal;font-size:.36em;font-weight:600;color:var(--muted);margin-left:6px;letter-spacing:0}
.rows{margin-top:20px;display:grid;gap:1px;background:var(--line);border-radius:10px;overflow:hidden}
.row{display:flex;justify-content:space-between;gap:14px;padding:11px 14px;background:#fff;font-size:13.5px}
.row span{color:var(--muted)}
.row b{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600}
.readout .use{margin-top:18px;font-size:13.5px;color:var(--ink2);line-height:1.7;
  padding-top:16px;border-top:1px solid var(--line)}

/* ---------- 配置器 ---------- */
.cfg{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh1)}
.cfg-grid{display:grid}
@media(min-width:940px){.cfg-grid{grid-template-columns:1.1fr .9fr}}
.cfg-l{padding:clamp(26px,3.6vw,40px)}
.cfg-r{background:var(--soft);border-top:1px solid var(--line);padding:clamp(26px,3.6vw,40px)}
@media(min-width:940px){.cfg-r{border-top:0;border-left:1px solid var(--line)}}
.fldset{margin-bottom:26px}
.fldset > .fl{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);margin-bottom:11px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opt{padding:9px 15px;border:1px solid var(--line);border-radius:9px;background:#fff;
  font-size:14px;font-weight:500;color:var(--ink2);transition:all .22s var(--ease);
  display:inline-flex;align-items:center;gap:8px}
.opt:hover{border-color:#C9CDD6}
.opt[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.opt .sw{width:8px;height:8px;border-radius:50%}
.code{font-family:var(--mono);font-size:clamp(1.5rem,3.6vw,2.2rem);font-weight:700;
  letter-spacing:-.03em;word-break:break-all;line-height:1.2}
.code span{color:var(--muted)}
.codewrap{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:14px 0 6px}
.copy{padding:7px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;
  font-size:12.5px;font-weight:600;color:var(--ink2);transition:all .22s}
.copy:hover{border-color:#C9CDD6}
.copy.ok{background:var(--green);border-color:var(--green);color:#fff}
.cfg-note{font-size:13px;color:var(--muted);line-height:1.7;margin-top:16px}

/* ---------- 数据表 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line2);vertical-align:top}
.tbl thead th{background:var(--soft);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);font-weight:600;white-space:nowrap}
.tbl tbody tr:last-child td{border-bottom:0}
.tbl td:first-child{color:var(--ink2);width:32%;font-weight:500}
.tbl td.m{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600}
.scrollx{overflow-x:auto;border-radius:var(--r-l);-webkit-overflow-scrolling:touch}
@media(max-width:680px){.tbl{font-size:13.5px;min-width:540px}.tbl th,.tbl td{padding:12px 14px}}

/* ---------- 质检 ---------- */
.qc{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden;grid-template-columns:1fr}
@media(min-width:600px){.qc{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.qc{grid-template-columns:repeat(3,1fr)}}
.qc div{background:#fff;padding:18px 20px;display:flex;gap:13px;align-items:flex-start;font-size:14.5px}
.qc .ck{width:17px;height:17px;flex:none;margin-top:4px;color:var(--green)}

/* ---------- 应用 ---------- */
.apps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden}
@media(min-width:820px){.apps{grid-template-columns:repeat(2,1fr)}}
.app{background:#fff;padding:30px 28px;transition:background .3s var(--ease)}
.app:hover{background:var(--soft)}
.app .ic{width:38px;height:38px;border-radius:10px;background:var(--tint);display:grid;place-items:center;
  color:var(--ink);margin-bottom:18px}
.app h3{font-size:17.5px;margin-bottom:10px}
.app p{font-size:14.5px;color:var(--muted);line-height:1.75}
.app .kv{margin-top:16px;font-family:var(--mono);font-size:12.5px;color:var(--ink2);
  display:flex;gap:8px;flex-wrap:wrap}
.app .kv i{font-style:normal;padding:4px 9px;border:1px solid var(--line);border-radius:6px;background:#fff}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line)}
summary{list-style:none;cursor:pointer;padding:24px 44px 24px 0;position:relative;
  font-size:16.5px;font-weight:600;letter-spacing:-.01em;transition:color .25s}
summary::-webkit-details-marker{display:none}
summary:hover{color:var(--blue)}
summary::after{content:"";position:absolute;right:6px;top:50%;width:11px;height:11px;
  border-right:1.8px solid var(--muted);border-bottom:1.8px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s var(--ease)}
details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
details .a{padding:0 60px 26px 0;font-size:14.8px;color:var(--ink2);line-height:1.85;max-width:78ch}
@media(max-width:600px){details .a{padding-right:10px}}

/* ---------- 表单 ---------- */
.formcard{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);
  padding:clamp(26px,3.8vw,44px);box-shadow:var(--sh2)}
.grid2{display:grid;gap:16px}
@media(min-width:720px){.grid2{grid-template-columns:1fr 1fr}}
.fld{display:grid;gap:8px}
.fld > label{font-size:13.5px;font-weight:600;color:var(--ink2)}
.fld > label i{font-style:normal;color:var(--red);margin-left:3px}
.fld input,.fld select,.fld textarea{font:inherit;font-size:15px;color:var(--ink);
  padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;width:100%;
  transition:border-color .22s,box-shadow .22s}
.fld textarea{resize:vertical;min-height:96px;line-height:1.7}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--ink);
  box-shadow:0 0 0 3px rgba(20,22,27,.07)}
.fld .err{font-size:12.5px;color:var(--red);min-height:16px;display:flex;align-items:center;gap:5px}
.fld.bad input,.fld.bad select,.fld.bad textarea{border-color:var(--red)}
.submit{width:100%;padding:16px 26px;font-size:15.5px;margin-top:6px}
.submit[disabled]{opacity:.6;cursor:progress}
.spin{width:15px;height:15px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;
  border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.ok-box{display:none;text-align:center;padding:34px 10px}
.ok-box .ic{width:56px;height:56px;border-radius:50%;background:#EAF6EE;color:var(--green);
  display:grid;place-items:center;margin:0 auto 20px}
.ok-box h3{font-size:21px;margin-bottom:12px}
.ok-box p{color:var(--muted);font-size:14.8px;max-width:44ch;margin:0 auto;line-height:1.8}

/* ---------- 页脚 ---------- */
footer{background:var(--panel);color:#A9B1BE;padding:clamp(52px,6vw,78px) 0 32px;position:relative;overflow:hidden}
footer .dgrid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(45deg,rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(-45deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:30px 30px;opacity:.8}
footer .wrap{position:relative}
.fgrid{display:grid;gap:38px}
@media(min-width:880px){.fgrid{grid-template-columns:1.5fr 1fr 1fr 1.1fr}}
footer .brand b{color:#fff}
footer .brand i{color:#7C8695}
footer h4{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#7C8695;font-weight:600;
  margin-bottom:16px}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:11px;font-size:14.5px}
footer a:hover{color:#fff}
.fbot{margin-top:clamp(40px,5vw,62px);padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:12.5px;color:#7C8695}
.fline{display:flex;align-items:center;gap:9px}
.fline .dot{background:var(--green);box-shadow:0 0 0 3px rgba(0,128,48,.22)}

/* ==========================================================
   多页站扩展
   ========================================================== */

/* ---------- 导航：LOGO 放大 / 当前页高亮 ---------- */
.nav .wrap{min-height:78px;gap:16px}
.brand svg{width:46px;height:46px}
.brand .bt b{font-size:18px;letter-spacing:-.022em}
.brand .bt i{font-size:12px;letter-spacing:.24em}
.navlinks a.current{color:var(--ink);font-weight:600}
.navlinks a.current::after{right:0}
.mob a.current{color:var(--blue)}
@media(max-width:380px){.brand svg{width:40px;height:40px}.brand .bt b{font-size:16px}}

/* ---------- 内页页头 ---------- */
.pagehead{position:relative;overflow:hidden;border-bottom:1px solid var(--line2);
  background:linear-gradient(180deg,#F9FAFC,#fff)}
.pagehead::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,var(--line2) 1px,transparent 1px),
                   linear-gradient(var(--line2) 1px,transparent 1px);
  background-size:76px 76px;
  -webkit-mask-image:radial-gradient(110% 96% at 84% 6%,#000,transparent 66%);
  mask-image:radial-gradient(110% 96% at 84% 6%,#000,transparent 66%)}
.pagehead .wrap{position:relative;padding:clamp(40px,4.6vw,68px) 0 clamp(36px,4.2vw,58px)}
.pagehead h1{font-size:clamp(1.95rem,3.8vw,2.95rem);letter-spacing:-.036em;margin:18px 0 0;max-width:20ch}
.pagehead .lead{margin-top:18px;max-width:62ch}
.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12.5px;color:var(--faint)}
.crumb a:hover{color:var(--ink)}
.crumb i{font-style:normal;color:#C9CDD6}
.pagehead .facts{margin-top:clamp(28px,3.4vw,42px)}
.sectionnav{display:flex;flex-wrap:wrap;gap:8px;padding:18px 0 0}
.sectionnav a{font-size:13.5px;padding:7px 14px;border:1px solid var(--line);border-radius:100px;
  color:var(--ink2);background:#fff;transition:all .25s var(--ease)}
.sectionnav a:hover{border-color:var(--ink);color:var(--ink)}

/* ---------- 事实条（不含任何指标数值） ---------- */
.facts{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden}
@media(min-width:600px){.facts{grid-template-columns:repeat(2,1fr)}}
@media(min-width:940px){.facts{grid-template-columns:repeat(4,1fr)}}
.facts > div{background:#fff;padding:20px 20px 22px}
.facts .fi{width:20px;height:20px;color:var(--blue);margin-bottom:12px}
.facts b{display:block;font-size:15px;font-weight:650;letter-spacing:-.01em;line-height:1.4}
.facts span{display:block;margin-top:7px;font-size:12.8px;color:var(--muted);line-height:1.65}

/* ---------- 双产品线入口卡 ---------- */
.duo{display:grid;gap:clamp(16px,2vw,22px)}
@media(min-width:880px){.duo{grid-template-columns:1.22fr .78fr}}
.pcard{position:relative;display:flex;flex-direction:column;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh1);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D3D8E1}
.pcard .ph{position:relative;background:var(--soft);overflow:hidden;border-bottom:1px solid var(--line2)}
.pcard .ph img{width:100%;height:clamp(200px,24vw,282px);object-fit:cover;
  transition:transform .95s var(--ease)}
.pcard:hover .ph img{transform:scale(1.04)}
.pcard .flag{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);
  border-radius:100px;padding:5px 13px;font-size:12px;font-weight:600;letter-spacing:.02em}
.pcard .bd{padding:clamp(20px,2.4vw,30px);display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:clamp(19px,1.7vw,22px)}
.pcard .en{font-family:var(--mono);font-size:11.5px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--faint);margin-top:8px}
.pcard p{font-size:14.6px;color:var(--muted);line-height:1.8;margin-top:14px}
.pcard ul{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px;
  font-size:14.2px;color:var(--ink2);line-height:1.6}
.pcard li{display:flex;gap:10px;align-items:flex-start}
.pcard li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--blue);
  margin-top:8px;flex:none}
.pcard .more{margin-top:auto;padding-top:24px}
.pcard .more a{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:650;
  border-bottom:1.5px solid transparent;padding-bottom:2px;transition:border-color .25s}
.pcard .more a:hover{border-bottom-color:currentColor}
.pcard .more svg{width:15px;height:15px}

/* 胶体碳：不配产品照片，用颗粒示意 + 色带 */
.carbonviz{position:relative;height:clamp(200px,24vw,282px);overflow:hidden;
  background:radial-gradient(120% 120% at 30% 8%,#F4F5F7,#E9EBEF 62%,#DFE2E7);
  display:grid;place-items:center;border-bottom:1px solid var(--line2)}
.carbonviz .membrane{position:relative;width:min(74%,340px);background:#FDFDFD;
  border:1px solid #D8DBE1;border-radius:6px;box-shadow:0 18px 40px -22px rgba(20,22,27,.5);
  padding:26px 20px;display:grid;gap:16px}
.carbonviz .mline{height:7px;border-radius:3px;background:linear-gradient(90deg,#1B1D22,#3A3E46,#1B1D22)}
.carbonviz .mline.ctl{width:44%;margin-inline:auto}
.carbonviz .mline.tst{width:100%;opacity:.5}
.carbonviz .grain{position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 50% 50%,rgba(20,22,27,.5) 0 1.4px,transparent 1.6px);
  background-size:13px 13px;
  -webkit-mask-image:radial-gradient(70% 70% at 50% 50%,#000,transparent 74%);
  mask-image:radial-gradient(70% 70% at 50% 50%,#000,transparent 74%);opacity:.5}
.carbonviz .lbl{position:absolute;bottom:14px;left:0;right:0;text-align:center;
  font-family:var(--mono);font-size:11.5px;color:var(--muted)}

/* ---------- 图文分栏 ---------- */
.split{display:grid;gap:clamp(28px,3.6vw,54px);align-items:center}
@media(min-width:920px){.split{grid-template-columns:1fr 1fr}
  .split--a{grid-template-columns:1.08fr .92fr}
  .split--rev>.split-media{order:-1}}
.media{border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);
  background:var(--soft);box-shadow:var(--sh1)}
.media img{width:100%;height:auto;display:block}
.media--dark{background:var(--panel)}
.media figcaption{padding:13px 18px;font-size:12.5px;color:var(--muted);
  background:#fff;border-top:1px solid var(--line2)}
.media--dark figcaption{background:var(--panel2);color:#98A1B0;border-color:rgba(255,255,255,.08)}

/* ---------- 要点列表 ---------- */
.blist{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:16px}
.blist li{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:flex-start}
.blist .ck{width:22px;height:22px;border-radius:50%;background:var(--tint);color:var(--blue);
  display:grid;place-items:center;margin-top:2px;flex:none}
.blist .ck svg{width:12px;height:12px}
.blist b{display:block;font-size:15.5px;font-weight:650;letter-spacing:-.012em}
.blist span{display:block;margin-top:5px;font-size:14.2px;color:var(--muted);line-height:1.75}

/* ---------- 引用块（自家定位语） ---------- */
.quote{position:relative;background:var(--soft);border:1px solid var(--line);
  border-left:3px solid var(--blue);border-radius:var(--r-m);padding:22px 26px;
  font-size:15.2px;line-height:1.85;color:var(--ink2)}
.quote b{color:var(--ink)}

/* ---------- 步骤 ---------- */
.steps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden;counter-reset:s}
@media(min-width:820px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps > div{background:#fff;padding:26px 24px 28px;counter-increment:s}
.steps > div::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);
  font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--faint)}
.steps b{display:block;margin:14px 0 9px;font-size:16px;font-weight:650;letter-spacing:-.012em}
.steps span{font-size:14px;color:var(--muted);line-height:1.75;display:block}

/* ---------- 窄幅提示条 ---------- */
.noteband{background:var(--panel);color:#C4CBD6;border-radius:var(--r-xl);
  padding:clamp(28px,3.6vw,44px);position:relative;overflow:hidden;box-shadow:var(--sh2)}
.noteband .dgrid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(45deg,rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(-45deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:30px 30px;opacity:.85}
.noteband .in{position:relative;display:grid;gap:22px;align-items:center}
@media(min-width:820px){.noteband .in{grid-template-columns:1fr auto}}
.noteband h3{color:#fff;font-size:clamp(1.25rem,2.1vw,1.6rem);letter-spacing:-.025em}
.noteband p{margin-top:10px;font-size:14.5px;line-height:1.8;max-width:58ch}
.noteband .btn--p{background:#fff;color:var(--ink)}
.noteband .btn--p:hover{background:#EDEFF3}

/* ---------- 标签云 ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips .tag{font-size:12.8px}

/* ---------- 联系方式块 ---------- */
.cgrid{display:grid;gap:clamp(22px,3vw,40px)}
@media(min-width:940px){.cgrid{grid-template-columns:.85fr 1.15fr}}
.cline{display:grid;gap:6px;padding:20px 0;border-bottom:1px solid var(--line2)}
.cline:first-of-type{border-top:1px solid var(--line2)}
.cline .lb{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);font-weight:600}
.cline .vl{font-size:clamp(17px,2vw,20px);font-weight:650;letter-spacing:-.015em}
.cline .vl.tel{font-family:var(--mono);font-size:clamp(21px,2.6vw,26px);letter-spacing:-.02em}
.cline .sub{font-size:13px;color:var(--muted)}

/* ---------- 长页面锚点滚动留白 ---------- */
[id]{scroll-margin-top:96px}

/* ---------- 页脚补充 ---------- */
footer .cen{font-family:var(--mono);font-size:12.5px;color:#7C8695;margin-top:14px}

/* ---------- 选型向导输出 ---------- */
.reqbox{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);
  padding:18px 20px;font-family:var(--mono);font-size:13.2px;line-height:1.95;
  white-space:pre-wrap;word-break:break-word;color:var(--ink2);margin:14px 0 6px}
.hint{display:none;align-items:center;gap:9px;margin-bottom:16px;padding:11px 15px;
  background:#EAF6EE;border:1px solid #CFE7D8;border-radius:10px;font-size:13.2px;color:#0B6B33}
.hint svg{width:15px;height:15px;flex:none}

/* ---------- 案例卡 ---------- */
.casegrid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden}
@media(min-width:700px){.casegrid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1060px){.casegrid{grid-template-columns:repeat(3,1fr)}}
.casegrid article{background:#fff;display:flex;flex-direction:column}
.casegrid .im{background:var(--soft);border-bottom:1px solid var(--line2);overflow:hidden;
  aspect-ratio:16/10;padding:14px}
.casegrid .im img{width:100%;height:100%;object-fit:contain;transition:transform .85s var(--ease)}
.casegrid article:hover .im img{transform:scale(1.045)}
.casegrid .tx{padding:22px 22px 26px;flex:1;display:flex;flex-direction:column}
.casegrid h3{font-size:16.5px;letter-spacing:-.015em}
.casegrid p{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.75}
.casegrid .kv{margin-top:auto;padding-top:16px;display:flex;flex-wrap:wrap;gap:7px;
  font-family:var(--mono);font-size:11.8px;color:var(--ink2)}
.casegrid .kv i{font-style:normal;padding:4px 9px;border:1px solid var(--line);border-radius:6px}
.casegrid .noim{aspect-ratio:auto;padding:24px 22px 6px;background:#fff;border-bottom:0}
.casegrid article.txtonly .tx{justify-content:center;padding:30px 26px}
.casegrid article.txtonly h3{font-size:17px}

/* ---------- 平台三栏 ---------- */
.plats{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden}
@media(min-width:840px){.plats{grid-template-columns:repeat(3,1fr)}}
.plat{background:#fff;padding:30px 28px 32px;display:flex;flex-direction:column}
.plat .bar{height:4px;width:44px;border-radius:3px;margin-bottom:20px}
.plat h3{font-size:18px}
.plat .en{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);margin-top:7px}
.plat p{margin-top:14px;font-size:14.2px;color:var(--muted);line-height:1.78}
.plat ul{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:9px;font-size:13.8px;color:var(--ink2)}
.plat li{display:flex;gap:9px;align-items:flex-start;line-height:1.6}
.plat li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--faint);margin-top:8px;flex:none}
.plat .tag{margin-top:auto;align-self:flex-start;margin-top:20px}

/* ---------- 双栏列表（技术特点） ---------- */
.grid2l{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden}
@media(min-width:840px){.grid2l{grid-template-columns:repeat(2,1fr)}}
.grid2l > div{background:#fff;padding:26px 26px 28px}
.grid2l h3{font-size:16.5px;display:flex;align-items:center;gap:11px}
.grid2l h3 svg{width:18px;height:18px;color:var(--blue);flex:none}
.grid2l p{margin-top:11px;font-size:14.2px;color:var(--muted);line-height:1.78}