@font-face{font-family:"Nandu Display";src:url("assets/fonts/smiley-sans-display.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Nandu Sans";src:url("assets/fonts/noto-sans-sc-subset.ttf") format("truetype");font-display:swap}

:root{
  --paper:#f2f4f3;
  --paper-deep:#e4e8e8;
  --ink:#11181c;
  --muted:#536068;
  --blue:#0b438d;
  --blue-dark:#072c60;
  --orange:#e74e16;
  --silver:#b9c1c4;
  --green:#206344;
  --line:rgba(17,24,28,.18);
  --rail:184px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:32px;scrollbar-color:var(--blue) var(--paper-deep);scrollbar-width:thin}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Nandu Sans","Microsoft YaHei",sans-serif;line-height:1.65;overflow-x:hidden}
body.menu-open{overflow:hidden}
::selection{background:var(--orange);color:white}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--paper-deep)}
::-webkit-scrollbar-thumb{background:var(--blue);border:2px solid var(--paper-deep)}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;height:100%;object-fit:cover}
button,input,select,textarea{font:inherit}
figure,p,h1,h2,h3,ol{margin:0}
section{scroll-margin-top:24px}

.skip-link{position:fixed;left:16px;top:12px;z-index:1000;padding:10px 16px;background:var(--ink);color:white;transform:translateY(-160%)}
.skip-link:focus{transform:none}
:focus-visible{outline:3px solid white;outline-offset:2px;box-shadow:0 0 0 5px var(--blue)}

.rail{position:fixed;inset:0 auto 0 0;z-index:20;width:var(--rail);display:flex;flex-direction:column;background:var(--paper);border-right:1px solid var(--line)}
.brand{display:flex;flex-direction:column;gap:20px;padding:30px 26px;border-bottom:1px solid var(--line)}
.brand-mark{width:50px;height:50px;fill:var(--blue)}
.brand-mark__heat{fill:var(--orange)}
.brand-copy{display:flex;flex-direction:column;gap:10px}
.brand-copy strong{font-family:"Nandu Display","Nandu Sans",sans-serif;font-size:21px;line-height:1.22;letter-spacing:.02em}
.brand-copy small{font-size:9px;letter-spacing:.16em;color:var(--blue)}
.site-nav{display:flex;flex-direction:column;padding:20px 0}
.site-nav a{min-height:54px;display:flex;align-items:center;gap:12px;padding:0 26px;border-left:4px solid transparent;font-size:14px}
.site-nav a:hover,.site-nav a:focus-visible{border-left-color:var(--orange);background:white}
.site-nav span{font:700 10px/1 "Nandu Sans";color:var(--blue)}
.rail-location{margin-top:auto;padding:22px 26px 28px;border-top:1px solid var(--line)}
.rail-location span{font-size:9px;letter-spacing:.18em;color:var(--blue)}
.rail-location p{margin-top:6px;font-size:12px;line-height:1.7}
.rail-progress{position:absolute;right:-2px;top:0;width:3px;height:100%;background:transparent}
.rail-progress i{display:block;width:100%;height:calc(var(--flow-progress,0) * 100%);background:linear-gradient(var(--orange) 0 15%,var(--blue) 65%);transform-origin:top}
.menu-button{display:none}

main,.site-footer{margin-left:var(--rail)}
.hero{min-height:100svh;display:grid;grid-template-columns:minmax(360px,43%) 1fr;grid-template-rows:1fr auto;position:relative;border-bottom:1px solid var(--line)}
.hero-copy{align-self:center;padding:clamp(48px,7vw,104px) clamp(36px,5vw,78px);position:relative;z-index:2}
.hero h1,.section-lead h2,.applications-head h2,.green-record h2,.contact h2{font-family:"Nandu Display","Nandu Sans",sans-serif;font-weight:700;line-height:.98;letter-spacing:-.035em}
.hero h1{font-size:clamp(58px,5.8vw,88px)}
.hero h1 span,.hero h1 em{display:block;white-space:nowrap}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero-intro{max-width:610px;margin-top:32px;font-size:17px;color:#36434a}
.action{display:inline-flex;align-items:center;justify-content:space-between;gap:50px;min-width:228px;margin-top:38px;padding:16px 18px;background:var(--blue);color:white;border:1px solid var(--blue);font-weight:700}
.action:hover{background:var(--ink);border-color:var(--ink)}
.hero-proof{display:flex;gap:22px;align-items:center;margin-top:54px;padding-top:17px;border-top:1px solid var(--line);font-size:11px}
.hero-proof span{color:var(--muted);letter-spacing:.12em}
.hero-proof strong{color:var(--green)}
.hero-media{position:relative;min-height:760px;background:var(--paper);overflow:hidden}
.hero-media img{object-fit:contain;object-position:center}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(242,244,243,.24),transparent 20%)}
.hero-media figcaption{position:absolute;inset:auto 22px 18px;z-index:2;display:flex;justify-content:space-between;color:white;font-size:9px;letter-spacing:.24em;text-shadow:0 1px 4px #000}
.hero-index{grid-column:1/-1;display:grid;grid-template-columns:repeat(5,1fr);list-style:none;padding:0;background:var(--ink);color:white}
.hero-index li{min-height:78px;display:flex;align-items:center;gap:12px;padding:0 20px;border-right:1px solid rgba(255,255,255,.18);font-size:13px}
.hero-index span{font:700 26px/1 "Nandu Display";color:#75a7e7}

.process{background:var(--paper)}
.section-lead{display:grid;grid-template-columns:1.2fr 1fr;gap:38px;padding:clamp(70px,9vw,136px) clamp(28px,6vw,92px);border-bottom:1px solid var(--line)}
.section-lead h2{font-size:clamp(46px,5.2vw,82px)}
.section-lead>p:last-child{align-self:end;max-width:460px;color:var(--muted)}
.process-row{min-height:370px;display:grid;grid-template-columns:minmax(280px,34%) 1fr 70px;position:relative;border-bottom:1px solid var(--line);overflow:hidden}
.process-row:nth-of-type(even){grid-template-columns:1fr minmax(280px,34%) 70px}
.process-row:nth-of-type(even) .step-copy{grid-column:2}.process-row:nth-of-type(even) figure{grid-column:1;grid-row:1}
.step-copy{padding:52px clamp(28px,5vw,74px);display:grid;align-content:center;position:relative;background:var(--paper);z-index:2}
.step-no{position:absolute;right:22px;top:12px;font:700 clamp(76px,9vw,144px)/1 "Nandu Display";color:rgba(11,67,141,.12)}
.step-copy h3{font:700 clamp(34px,4vw,62px)/1.05 "Nandu Display";margin-top:12px}
.step-copy>p:last-child{max-width:420px;margin-top:22px;color:var(--muted)}
.process-row figure{min-height:370px;overflow:hidden}
.process-row figure img{transition:transform .7s ease}
.process-row:hover figure img{transform:scale(1.02)}
.process-arrow{display:grid;place-items:center;background:var(--blue);color:white;font-size:26px}
.process-row--hot .process-arrow{background:var(--orange)}
.process-row--solid .process-arrow{background:var(--green)}

.applications{background:var(--ink);color:white;padding:clamp(76px,10vw,144px) clamp(28px,6vw,92px)}
.applications-head{display:grid;grid-template-columns:1fr 1.2fr;gap:52px;margin-bottom:70px}
.applications-head h2{font-size:clamp(48px,6vw,92px)}
.applications-head>p:last-child{align-self:end;max-width:520px;color:#c0c9cc}
.application{display:grid;grid-template-columns:1.5fr 1fr;min-height:500px;border-top:1px solid rgba(255,255,255,.28)}
.application--telecom{grid-template-columns:1fr 1.5fr;border-bottom:1px solid rgba(255,255,255,.28)}
.application figure{min-height:500px;overflow:hidden}
.application>div{padding:48px;display:flex;flex-direction:column;justify-content:flex-end;background:#142027}
.application--telecom>div{background:var(--blue-dark)}
.application span{font-size:9px;letter-spacing:.17em;color:#95bdef}
.application h3{font:700 clamp(38px,4.5vw,70px)/1 "Nandu Display";margin-top:16px}
.application p{max-width:430px;margin-top:20px;color:#cad2d5}

.green-record{min-height:520px;display:grid;grid-template-columns:.7fr 1.1fr 1fr;gap:48px;align-items:center;position:relative;padding:clamp(72px,9vw,132px) clamp(28px,6vw,92px);background:#dfe7e2;color:#142c20;overflow:hidden}
.green-index{align-self:start;font-size:10px;letter-spacing:.18em;color:var(--green)}
.green-record h2{font-size:clamp(50px,6vw,92px);position:relative;z-index:2}
.green-record__body{position:relative;z-index:2}
.green-record__body p{padding:18px 0;border-top:1px solid rgba(20,44,32,.28)}
.green-stamp{position:absolute;right:-20px;bottom:-60px;font:700 280px/1 "Nandu Display";color:rgba(32,99,68,.09)}

.contact{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;padding:clamp(72px,9vw,132px) clamp(28px,6vw,92px);background:var(--blue);color:white}
.contact h2{font-size:clamp(48px,6vw,88px);margin-top:18px}
.contact-intro>p:nth-of-type(2){max-width:560px;margin-top:30px;color:#d7e5f7}
.contact address{margin-top:62px;padding-top:18px;border-top:1px solid rgba(255,255,255,.35);font-style:normal}
.contact address span{display:block;margin-bottom:8px;font-size:10px;letter-spacing:.18em;color:#bdd4f3}
.contact-form{align-self:center;padding:42px;background:var(--paper);color:var(--ink)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.contact-form label{display:block;margin-bottom:18px;font-size:12px;font-weight:700;letter-spacing:.04em}
.contact-form label span{color:#b5350a;margin-left:3px}
.contact-form input,.contact-form select,.contact-form textarea{display:block;width:100%;min-height:48px;margin-top:8px;border:0;border-bottom:1px solid #657279;background:transparent;border-radius:0;padding:10px 4px;color:var(--ink)}
.contact-form input,.contact-form select,.contact-form textarea{caret-color:var(--orange)}
.contact-form textarea{resize:vertical}
.contact-form button{min-height:52px;width:100%;display:flex;justify-content:space-between;align-items:center;border:0;border-radius:0;padding:0 18px;background:var(--ink);color:white;font-weight:700;cursor:pointer}
.contact-form button:hover{background:#a9340d}
.form-status{min-height:26px;margin-top:14px;color:#7f2e13;font-weight:700;font-size:13px}

.site-footer{display:grid;grid-template-columns:1fr 1fr auto;gap:24px;padding:28px clamp(28px,6vw,92px);background:var(--ink);color:#c8d0d3;font-size:11px;border-top:1px solid rgba(255,255,255,.15)}
.site-footer p:last-child{color:#9aa5a9}

@media (max-width:1100px){
  :root{--rail:148px}
  .brand{padding:24px 18px}.brand-copy strong{font-size:18px}.site-nav a{padding:0 18px}.rail-location{padding:20px 18px}
  .hero{grid-template-columns:1fr 1.2fr}.hero h1{font-size:clamp(50px,6.5vw,64px)}.hero-media{min-height:680px}
  .section-lead{grid-template-columns:1fr 1fr}.section-lead>p:last-child{grid-column:2}
  .applications-head{grid-template-columns:1fr}.applications-head>p:last-child{align-self:auto}
  .green-record{grid-template-columns:.5fr 1fr}.green-record__body{grid-column:2}
  .contact{grid-template-columns:1fr}.contact-form{max-width:760px}
}

@media (max-width:780px){
  :root{--rail:0px}
  html{scroll-padding-top:76px}
  .rail{inset:0 0 auto;width:100%;height:74px;display:flex;flex-direction:row;align-items:center;background:rgba(242,244,243,.96);backdrop-filter:blur(12px);border-right:0;border-bottom:1px solid var(--line)}
  .brand{height:74px;flex:1;flex-direction:row;align-items:center;gap:12px;padding:10px 16px;border:0}.brand-mark{width:38px;height:38px}.brand-copy{gap:2px}.brand-copy strong{font-size:15px;line-height:1.15}.brand-copy small{font-size:7px}
  .menu-button{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:92px;min-height:52px;margin-right:11px;padding:0 14px;border:1px solid var(--ink);border-radius:0;background:transparent;color:var(--ink);font-weight:700}
  .menu-button i,.menu-button i::before{display:block;width:18px;height:2px;background:currentColor;content:""}.menu-button i::before{transform:translateY(6px)}
  .menu-button[aria-expanded="true"] i{transform:rotate(45deg)}.menu-button[aria-expanded="true"] i::before{transform:rotate(-90deg)}
  .site-nav{position:fixed;top:74px;left:0;width:100vw;height:calc(100dvh - 74px);z-index:30;display:flex;padding:24px;overflow-y:auto;background:var(--blue-dark);color:white;transform:translateX(100%);opacity:0;pointer-events:none;transition:transform .32s ease,opacity .18s ease;visibility:hidden}
  .site-nav.is-open{transform:none;opacity:1;pointer-events:auto;visibility:visible}
  .site-nav a{min-height:64px;padding:0 10px;border-left:0;border-bottom:1px solid rgba(255,255,255,.2);font:700 26px/1 "Nandu Display"}.site-nav a:hover,.site-nav a:focus-visible{border-left:0;background:rgba(255,255,255,.08)}.site-nav span{color:#8bb6ed}
  .rail-location,.rail-progress{display:none}
  main,.site-footer{margin-left:0}
  .hero{min-height:auto;display:flex;flex-direction:column;padding-top:74px}.hero-copy{padding:58px 20px 42px}.hero h1{font-size:clamp(48px,13vw,52px);line-height:1.02}.hero-intro{font-size:15px}.hero-proof{flex-direction:column;align-items:flex-start;gap:5px;margin-top:38px}.hero-media{min-height:300px;order:2}.hero-media img{object-position:center}.hero-index{order:3;grid-template-columns:1fr}.hero-index li{min-height:54px;border-right:0;border-bottom:1px solid rgba(255,255,255,.15)}
  .section-lead{display:block;padding:72px 20px}.section-lead h2{margin-top:18px;font-size:48px}.section-lead>p:last-child{margin-top:26px}
  .process-row,.process-row:nth-of-type(even){display:flex;flex-direction:column;min-height:0}.process-row:nth-of-type(even) .step-copy,.process-row:nth-of-type(even) figure{grid-column:auto;grid-row:auto}.step-copy{min-height:270px;padding:42px 20px}.step-no{font-size:90px}.process-row figure{min-height:280px}.process-arrow{min-height:54px}.process-row:hover figure img{transform:none}
  .applications{padding:72px 20px}.applications-head{margin-bottom:48px}.applications-head h2{font-size:52px}.application,.application--telecom{display:flex;flex-direction:column;min-height:0}.application--telecom>div{order:2}.application figure{min-height:310px}.application>div{min-height:300px;padding:30px 22px}.application h3{font-size:46px}
  .green-record{display:block;min-height:0;padding:72px 20px}.green-record h2{margin-top:18px;font-size:52px}.green-record__body{margin-top:38px}.green-stamp{font-size:170px}
  .contact{display:block;padding:72px 20px}.contact h2{font-size:50px}.contact address{margin:38px 0}.contact-form{padding:28px 18px}.field-row{grid-template-columns:1fr;gap:0}
  .site-footer{grid-template-columns:1fr;padding:28px 20px;gap:8px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .rail-progress i{height:100%}
}