/* ==========================================================================
   扬光环境 · 官网样式
   基调：白 + 墨绿，宽松留白，克制的滚动入场动效
   ========================================================================== */
:root{
  --green:#25453A;
  --green-deep:#1A332B;
  --green-mid:#3B6B58;
  --green-soft:#E6EEEA;
  --green-tint:#F2F6F4;
  --ink:#171C1A;
  --text:#2E3634;
  --muted:#6B7572;
  --faint:#9AA5A1;
  --line:#E1E7E4;
  --bg:#FFFFFF;
  --bg-alt:#F5F7F6;
  --radius:4px;
  --shadow-sm:0 1px 2px rgba(23,28,26,.04),0 4px 14px rgba(23,28,26,.05);
  --shadow-md:0 6px 20px rgba(23,28,26,.08),0 18px 40px rgba(23,28,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --container:1440px;
  --gutter:64px;
  --header-h:88px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:var(--bg);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{font-weight:600;line-height:1.25;color:var(--ink);letter-spacing:-.01em}
.en{font-family:"Inter","Helvetica Neue",Arial,sans-serif}
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.container--wide{max-width:1680px}
.section{padding:120px 0}
.section--tight{padding:88px 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--green);color:rgba(255,255,255,.82)}
.section--dark h2,.section--dark h3{color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--green-mid);font-weight:600;margin-bottom:18px}
.eyebrow::before{content:"";width:28px;height:1px;background:currentColor}
.section--dark .eyebrow{color:rgba(255,255,255,.65)}
.h2{font-size:clamp(30px,3vw,44px);margin-bottom:16px}
.h3{font-size:clamp(22px,1.8vw,28px)}
.lead{font-size:18px;color:var(--muted);max-width:760px}
.sub-en{font-size:13px;color:var(--faint);letter-spacing:.04em;margin-top:6px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:56px}
.section-head .lead{margin-top:8px}
.section-head--center{flex-direction:column;align-items:center;text-align:center}
.section-head--center .lead{margin:8px auto 0}

/* Buttons ---------------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 30px;border-radius:var(--radius);font-size:15px;font-weight:500;letter-spacing:.02em;border:1px solid transparent;cursor:pointer;transition:background-color .35s var(--ease),color .35s var(--ease),border-color .35s var(--ease),transform .15s var(--ease),box-shadow .35s var(--ease);white-space:nowrap}
.btn:active{transform:translateY(1px) scale(.99)}
.btn svg{width:16px;height:16px;transition:transform .35s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--primary{background:var(--green);color:#fff;border-color:var(--green)}
.btn--primary:hover{background:var(--green-deep);border-color:var(--green-deep)}
.btn--outline{background:transparent;color:var(--green);border-color:var(--green)}
.btn--outline:hover{background:var(--green);color:#fff}
.btn--light{background:#fff;color:var(--green);border-color:#fff}
.btn--light:hover{background:var(--green-soft)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn--sm{height:44px;padding:0 22px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:500;font-size:15px}
.link-more svg{width:16px;height:16px;transition:transform .35s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}

/* Header ----------------------------------------------------------------- */
.header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);transition:height .4s var(--ease),background-color .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);background:rgba(255,255,255,0);border-bottom:1px solid rgba(255,255,255,0)}
.header__inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:40px}
.header__logo img{height:52px;width:auto;transition:height .4s var(--ease)}
.header__logo .logo-white{display:none}
.header--transparent:not(.is-scrolled){border-bottom-color:rgba(255,255,255,.14)}
.header--transparent:not(.is-scrolled) .logo-green{display:none}
.header--transparent:not(.is-scrolled) .logo-white{display:block}
.header.is-solid,.header.is-scrolled{background:rgba(255,255,255,.96);backdrop-filter:saturate(160%) blur(10px);-webkit-backdrop-filter:saturate(160%) blur(10px);border-bottom-color:var(--line);box-shadow:0 2px 20px rgba(23,28,26,.05)}
.header.is-scrolled{height:68px}
.header.is-scrolled .header__logo img{height:42px}
.nav{display:flex;align-items:center;gap:4px}
.nav__item{position:relative}
.nav__link{display:flex;align-items:center;gap:6px;height:var(--header-h);padding:0 16px;font-size:15px;font-weight:500;color:var(--ink);position:relative;transition:color .3s var(--ease)}
.nav__link::after{content:"";position:absolute;left:16px;right:16px;bottom:22px;height:2px;background:var(--green);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.nav__item:hover>.nav__link::after,.nav__item.is-active>.nav__link::after{transform:scaleX(1)}
.nav__link svg{width:12px;height:12px;opacity:.6;transition:transform .3s var(--ease)}
.nav__item:hover>.nav__link svg{transform:rotate(180deg)}
.header.is-scrolled .nav__link{height:68px}
.header.is-scrolled .nav__link::after{bottom:14px}
.header--transparent:not(.is-scrolled) .nav__link{color:#fff}
.header--transparent:not(.is-scrolled) .nav__link::after{background:#fff}
.header__cta{display:flex;align-items:center;gap:16px}
.header__tel{font-size:14px;font-weight:500;color:var(--ink);display:flex;align-items:center;gap:8px}
.header__tel svg{width:16px;height:16px;color:var(--green)}
.header--transparent:not(.is-scrolled) .header__tel{color:#fff}
.header--transparent:not(.is-scrolled) .header__tel svg{color:#fff}
.header--transparent:not(.is-scrolled) .btn--primary{background:#fff;color:var(--green);border-color:#fff}
.header--transparent:not(.is-scrolled) .btn--primary:hover{background:var(--green-soft)}
/* dropdown */
.dropdown{position:absolute;top:100%;left:0;min-width:300px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:16px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .35s var(--ease),transform .35s var(--ease),visibility 0s linear .35s}
.nav__item:hover>.dropdown,.nav__item.is-open>.dropdown{opacity:1;visibility:visible;transform:translateY(0);transition-delay:0s}
.dropdown--cols{display:grid;grid-template-columns:repeat(2,1fr);min-width:620px;padding:20px 12px}
.dropdown--cols3{grid-template-columns:repeat(3,1fr);min-width:900px}
.dropdown a{display:flex;align-items:baseline;gap:12px;padding:9px 20px;font-size:14px;color:var(--text);transition:color .25s,background-color .25s;border-radius:3px}
.dropdown a:hover{color:var(--green);background:var(--green-tint)}
.dropdown a .num{font-size:11px;color:var(--faint);letter-spacing:.06em;font-family:"Inter",sans-serif;min-width:20px}
.dropdown a .en{display:block;font-size:11px;color:var(--faint);letter-spacing:.03em;margin-top:1px}
.nav__item--mega{position:static}
.nav__item--mega .dropdown{left:50%;transform:translate(-50%,8px)}
.nav__item--mega:hover>.dropdown,.nav__item--mega.is-open>.dropdown{transform:translate(-50%,0)}
.burger{display:none;width:44px;height:44px;border:0;background:transparent;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.burger span{display:block;width:24px;height:2px;background:var(--ink);transition:transform .35s var(--ease),opacity .3s}
.header--transparent:not(.is-scrolled) .burger span{background:#fff}
.burger.is-open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* Mobile nav */
.mnav{position:fixed;inset:0;z-index:99;background:#fff;padding:96px 28px 40px;overflow-y:auto;transform:translateX(100%);transition:transform .45s var(--ease);display:none}
.mnav.is-open{transform:translateX(0)}
.mnav__item{border-bottom:1px solid var(--line)}
.mnav__link{display:flex;justify-content:space-between;align-items:center;padding:16px 0;font-size:17px;font-weight:500;color:var(--ink)}
.mnav__link svg{width:14px;height:14px;transition:transform .3s}
.mnav__item.is-open .mnav__link svg{transform:rotate(180deg)}
.mnav__sub{display:none;padding:0 0 12px}
.mnav__item.is-open .mnav__sub{display:block}
.mnav__sub a{display:block;padding:8px 0 8px 14px;font-size:15px;color:var(--muted)}
.mnav__contact{margin-top:28px;font-size:14px;color:var(--muted);line-height:2}

/* Hero (home) ------------------------------------------------------------ */
.hero{position:relative;height:100vh;min-height:640px;max-height:980px;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--green-deep)}
.hero__bg{position:absolute;inset:0;background-size:cover;background-position:center 55%;animation:kenburns 28s ease-in-out infinite alternate;will-change:transform}
@keyframes kenburns{from{transform:scale(1) translate3d(0,0,0)}to{transform:scale(1.08) translate3d(-1.2%,1%,0)}}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(26,51,43,.82) 0%,rgba(26,51,43,.5) 42%,rgba(26,51,43,.08) 78%),linear-gradient(180deg,rgba(18,32,27,.5) 0%,rgba(18,32,27,0) 26%),linear-gradient(0deg,rgba(18,32,27,.55) 0%,rgba(18,32,27,0) 38%)}
.hero__content{position:relative;z-index:2;max-width:980px;padding-top:40px}
.hero__eyebrow{font-size:13px;letter-spacing:.3em;text-transform:uppercase;opacity:.75;margin-bottom:28px;display:flex;align-items:center;gap:14px}
.hero__eyebrow::before{content:"";width:40px;height:1px;background:#fff;opacity:.7}
.hero h1{color:#fff;font-size:clamp(38px,4.8vw,72px);font-weight:600;letter-spacing:.03em;line-height:1.18;margin-bottom:22px}
.hero__en{font-size:clamp(14px,1.1vw,18px);letter-spacing:.2em;opacity:.78;margin-bottom:44px;font-weight:400}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero__scroll{position:absolute;left:var(--gutter);bottom:36px;z-index:2;display:flex;align-items:center;gap:12px;font-size:11px;letter-spacing:.25em;text-transform:uppercase;opacity:.65}
.hero__scroll span{display:block;width:1px;height:44px;background:#fff;position:relative;overflow:hidden}
.hero__scroll span::after{content:"";position:absolute;left:0;top:-100%;width:100%;height:100%;background:var(--green-deep);animation:scrollhint 2.2s ease-in-out infinite}
@keyframes scrollhint{0%{top:-100%}60%{top:100%}100%{top:100%}}
.hero__stats{position:absolute;right:var(--gutter);bottom:0;z-index:2;display:flex;gap:0;background:rgba(255,255,255,.08);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.14);border-bottom:0}
.hero__stats div{padding:22px 32px;border-right:1px solid rgba(255,255,255,.14);min-width:150px}
.hero__stats div:last-child{border-right:0}
.hero__stats b{display:block;font-size:30px;font-weight:600;line-height:1.1;letter-spacing:-.02em}
.hero__stats small{display:block;font-size:12px;opacity:.72;margin-top:6px;letter-spacing:.06em}

/* Page hero (inner pages) ------------------------------------------------ */
.page-hero{position:relative;height:460px;display:flex;align-items:flex-end;color:#fff;overflow:hidden;background:var(--green-deep)}
.page-hero--short{height:380px}
.page-hero__bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.04);animation:kenburns-soft 24s ease-in-out infinite alternate}
@keyframes kenburns-soft{from{transform:scale(1.04)}to{transform:scale(1.1)}}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(18,32,27,.78) 0%,rgba(18,32,27,.35) 55%,rgba(18,32,27,.25) 100%)}
.page-hero__content{position:relative;z-index:2;padding-bottom:64px;width:100%}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.04em;opacity:.78;margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb i{font-style:normal;opacity:.6}
.page-hero h1{color:#fff;font-size:clamp(32px,3.6vw,54px);letter-spacing:.01em}
.page-hero .page-hero__en{font-size:14px;letter-spacing:.22em;text-transform:uppercase;opacity:.7;margin-top:12px}

/* Reveal ----------------------------------------------------------------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease);transition-delay:var(--d,0s);will-change:opacity,transform}
.reveal.is-in{opacity:1;transform:none}
.reveal--img{transform:translateY(18px) scale(1.01)}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.hero__bg,.page-hero__bg{animation:none}}

/* Grids & cards ---------------------------------------------------------- */
.grid{display:grid;gap:28px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .5s var(--ease),transform .5s var(--ease),border-color .5s var(--ease);display:flex;flex-direction:column;position:relative}
.card:hover{box-shadow:var(--shadow-md);border-color:transparent;transform:translateY(-4px)}
.card__media{position:relative;overflow:hidden;background:#fff;aspect-ratio:1/1}
.card__media--wide{aspect-ratio:16/10}
.card__media--43{aspect-ratio:4/3}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.card:hover .card__media img{transform:scale(1.045)}
.card__body{padding:22px 26px 26px;flex:1;display:flex;flex-direction:column;gap:6px}
.card__num{font-size:11px;letter-spacing:.2em;color:var(--faint);font-family:"Inter",sans-serif}
.card__title{font-size:18px;font-weight:600;color:var(--ink);line-height:1.4}
.card__en{font-size:12px;color:var(--faint);letter-spacing:.04em;font-family:"Inter",sans-serif}
.card__desc{font-size:14px;color:var(--muted);line-height:1.75;margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;color:var(--green);font-size:14px;font-weight:500}
.card__foot svg{width:18px;height:18px;transition:transform .4s var(--ease)}
.card:hover .card__foot svg{transform:translateX(5px)}
.card--dark{background:transparent;border-color:rgba(255,255,255,.14);color:#fff}
.card--dark .card__title{color:#fff}
.card--dark:hover{border-color:rgba(255,255,255,.4);box-shadow:none;background:rgba(255,255,255,.04)}
.stretched::after{content:"";position:absolute;inset:0}

/* Home: intro */
.intro{display:grid;grid-template-columns:1.05fr 1fr;gap:96px;align-items:center}
.intro__text p{margin-bottom:22px}
.intro__text .en-p{font-size:14px;color:var(--faint);line-height:1.85}
.intro__media{position:relative}
.intro__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius)}
.intro__media::before{content:"";position:absolute;right:-24px;bottom:-24px;width:60%;height:60%;border:1px solid var(--green);border-radius:var(--radius);z-index:-1}
.intro__badge{position:absolute;left:-32px;bottom:40px;background:var(--green);color:#fff;padding:22px 26px;border-radius:var(--radius);box-shadow:var(--shadow-md);max-width:260px}
.intro__badge b{display:block;font-size:26px;line-height:1.2;margin-bottom:4px}
.intro__badge span{font-size:12px;opacity:.8;letter-spacing:.06em}

/* Home: product grid */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;position:relative;overflow:hidden;transition:box-shadow .5s var(--ease),transform .5s var(--ease),border-color .5s var(--ease)}
.pcard:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:transparent}
.pcard__media{aspect-ratio:4/3;overflow:hidden;background:linear-gradient(180deg,#FBFCFC 0%,#F0F4F2 100%);display:flex;align-items:center;justify-content:center;padding:7% 9%}
.pcard__media img{width:100%;height:100%;object-fit:contain;transition:transform .9s var(--ease)}
.pcard:hover .pcard__media img{transform:scale(1.06)}
.pcard__body{padding:20px 24px 24px}
.pcard__num{font-size:11px;letter-spacing:.2em;color:var(--faint);font-family:"Inter",sans-serif;margin-bottom:6px}
.pcard__title{font-size:17px;font-weight:600;color:var(--ink);line-height:1.4}
.pcard__en{font-size:12px;color:var(--faint);margin-top:4px;letter-spacing:.03em;font-family:"Inter",sans-serif}
.pcard__arrow{position:absolute;right:22px;bottom:22px;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--green);transition:background-color .4s,border-color .4s,color .4s}
.pcard__arrow svg{width:14px;height:14px}
.pcard:hover .pcard__arrow{background:var(--green);border-color:var(--green);color:#fff}

/* Home: industries (dark) */
.ind-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12)}
.ind-grid a{background:var(--green);padding:30px 22px;min-height:150px;display:flex;flex-direction:column;justify-content:space-between;transition:background-color .4s var(--ease)}
.ind-grid a:hover{background:var(--green-mid)}
.ind-grid .num{font-size:11px;letter-spacing:.2em;opacity:.5;font-family:"Inter",sans-serif}
.ind-grid b{display:block;font-size:18px;font-weight:600;color:#fff}
.ind-grid small{display:block;font-size:11px;opacity:.6;letter-spacing:.04em;margin-top:4px;font-family:"Inter",sans-serif}

/* Home: strength (full-bleed image band) */
.band{position:relative;min-height:560px;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--green-deep)}
.band__bg{position:absolute;inset:0;background-size:cover;background-position:center}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,32,27,.82) 0%,rgba(18,32,27,.55) 50%,rgba(18,32,27,.2) 100%)}
.band__content{position:relative;z-index:2;max-width:640px;padding:100px 0}
.band__content h2{color:#fff}
.band__content p{opacity:.85;margin-bottom:14px}
.band__content .en-p{font-size:13px;opacity:.6;line-height:1.8}
.thumb-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:-64px;position:relative;z-index:3}
.thumb-strip figure{overflow:hidden;border-radius:var(--radius);box-shadow:var(--shadow-md);background:#fff;aspect-ratio:4/3}
.thumb-strip img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.thumb-strip figure:hover img{transform:scale(1.05)}

/* Home: advantages */
.adv{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.adv__item{padding:40px 36px 40px;border-top:2px solid var(--green);background:#fff;border-radius:0 0 var(--radius) var(--radius);box-shadow:var(--shadow-sm);transition:box-shadow .5s var(--ease),transform .5s var(--ease)}
.adv__item:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.adv__key{font-size:12px;letter-spacing:.24em;color:var(--green-mid);font-family:"Inter",sans-serif;font-weight:600}
.adv__name{font-size:30px;font-weight:600;color:var(--ink);margin:10px 0 24px}
.adv__name small{font-size:13px;color:var(--faint);font-weight:400;letter-spacing:.2em;font-family:"Inter",sans-serif}
.adv ul li{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px}
.adv ul li:last-child{border-bottom:0}
.adv ul li span{display:block;font-size:12px;color:var(--faint);letter-spacing:.02em;font-family:"Inter",sans-serif;margin-top:2px}

/* Split (image + text) */
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.split--rev .split__media{order:2}
.split__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius)}
.split__text p{margin-bottom:18px}
.split__text .en-p{font-size:14px;color:var(--faint);line-height:1.85}
.checks{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 24px;margin:24px 0 32px}
.checks li{display:flex;gap:10px;font-size:15px;align-items:flex-start}
.checks li::before{content:"";flex:none;width:18px;height:18px;margin-top:5px;border-radius:50%;background:var(--green-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2325453A' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/10px no-repeat}

/* Inquiry form ----------------------------------------------------------- */
.inquiry{display:grid;grid-template-columns:1fr 1.25fr;gap:80px;align-items:start}
.inquiry__info h2{margin-bottom:14px}
.inquiry__info p{color:var(--muted);margin-bottom:28px}
.contact-list li{display:flex;gap:16px;padding:18px 0;border-top:1px solid var(--line);font-size:15px}
.contact-list li:last-child{border-bottom:1px solid var(--line)}
.contact-list .k{flex:none;width:72px;color:var(--faint);font-size:13px;letter-spacing:.06em;padding-top:2px}
.contact-list b{display:block;font-weight:600;color:var(--ink)}
.contact-list a{color:var(--green)}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:44px 44px 40px;box-shadow:var(--shadow-sm)}
.section--alt .form{border-color:transparent}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:20px 24px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.field label{font-size:13px;color:var(--muted);letter-spacing:.04em}
.field label i{color:#C0392B;font-style:normal;margin-left:2px}
.field input,.field textarea{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;padding:10px 0;font-size:15px;color:var(--ink);outline:0;border-radius:0;transition:border-color .3s var(--ease);-webkit-appearance:none}
.field textarea{min-height:120px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{border-bottom-color:var(--green)}
.field input::placeholder,.field textarea::placeholder{color:#B5BEBA}
.field.is-error input,.field.is-error textarea{border-bottom-color:#C0392B}
.form__foot{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:8px;flex-wrap:wrap}
.form__note{font-size:12px;color:var(--faint)}
.form__msg{display:none;margin-top:18px;padding:14px 18px;background:var(--green-tint);border-left:3px solid var(--green);font-size:14px;color:var(--green)}
.form__msg.is-show{display:block}

/* Footer ----------------------------------------------------------------- */
.footer{background:var(--green-deep);color:rgba(255,255,255,.72);font-size:14px}
.footer__top{display:grid;grid-template-columns:1.3fr 1.5fr .7fr 1.2fr;gap:48px;padding:88px 0 64px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer__brand img{height:52px;width:auto;margin-bottom:22px}
.footer__brand p{max-width:360px;line-height:1.85;font-size:13px;opacity:.75}
.footer h4{color:#fff;font-size:14px;letter-spacing:.14em;margin-bottom:22px;font-weight:600}
.footer li{margin-bottom:10px}
.footer a{transition:color .3s}
.footer a:hover{color:#fff}
.footer__cols2{columns:2;column-gap:24px}.footer__cols2 li{white-space:nowrap;break-inside:avoid;font-size:13px}
.footer__addr li{display:flex;gap:10px;margin-bottom:14px;line-height:1.7}
.footer__addr b{color:#fff;font-weight:600;display:block}
.footer__addr svg{flex:none;width:16px;height:16px;margin-top:5px;opacity:.7}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;font-size:12px;opacity:.6;flex-wrap:wrap;gap:12px}
.backtop{position:fixed;right:28px;bottom:28px;width:48px;height:48px;border-radius:50%;background:var(--green);color:#fff;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .4s,transform .4s,visibility 0s .4s;z-index:90}
.backtop.is-show{opacity:1;visibility:visible;transform:none;transition-delay:0s}
.backtop svg{width:18px;height:18px}
.backtop:hover{background:var(--green-mid)}

/* Product list ----------------------------------------------------------- */
.plist{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.plist .card__media{aspect-ratio:4/3;padding:6% 8%;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#FBFCFC 0%,#F0F4F2 100%)}
.plist .card__media img{object-fit:contain}

/* Product detail --------------------------------------------------------- */
.pd-hero{height:520px}
.pd-hero .page-hero__bg{background-position:center 35%}
.pd-overview{display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center}
.pd-overview__tag{font-size:18px;color:var(--green);margin:18px 0 28px;letter-spacing:.06em}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stats div{padding:22px 24px;background:var(--bg-alt);border-radius:var(--radius);border-left:2px solid var(--green)}
.stats small{display:block;font-size:12px;color:var(--faint);letter-spacing:.08em;margin-bottom:6px}
.stats b{font-size:20px;font-weight:600;color:var(--ink)}
.pd-overview__media{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:6%;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center}
.pd-overview__media img{max-height:100%;object-fit:contain}
/* groups */
.pgroups{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:28px}
.pgroup{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px;transition:box-shadow .5s var(--ease)}
.pgroup:hover{box-shadow:var(--shadow-md)}
.pgroup h3{font-size:19px;margin-bottom:4px}
.pgroup__desc{font-size:13px;color:var(--faint);margin-bottom:18px}
.pgroup__item{display:grid;grid-template-columns:96px 1fr;gap:14px;padding:16px 0;border-top:1px solid var(--line);font-size:14px}
.pgroup__item .code{font-weight:600;color:var(--green);font-family:"Inter",sans-serif;font-size:15px;line-height:1.4}
.pgroup__item .grade{display:block;font-size:11px;color:var(--faint);margin-top:4px;font-family:"Inter",sans-serif}
.pgroup__item .name{font-weight:600;color:var(--ink)}
.pgroup__item .spec{color:var(--muted);font-size:13px;margin-top:2px}
.pgroup__item .use{color:var(--muted);font-size:13px}
/* series */
.series{padding:88px 0;border-top:1px solid var(--line)}
.series:first-of-type{border-top:0}
.series__head{display:flex;align-items:baseline;gap:18px;margin-bottom:40px;flex-wrap:wrap}
.series__head .code{font-size:12px;letter-spacing:.2em;color:var(--green-mid);font-family:"Inter",sans-serif;font-weight:600}
.series__head h3{font-size:clamp(24px,2vw,30px)}
.series__head .en{font-size:13px;color:var(--faint);letter-spacing:.03em;width:100%}
.series__body{display:grid;grid-template-columns:460px 1fr;gap:64px;align-items:start}
.gallery__main{aspect-ratio:1/1;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,#FFFFFF 0%,#F3F6F4 100%);overflow:hidden;display:flex;align-items:center;justify-content:center;padding:5%}
.gallery__main img{width:100%;height:100%;object-fit:contain;transition:opacity .4s}
.gallery__thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.gallery__thumbs button{width:76px;height:76px;border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:6px;cursor:pointer;transition:border-color .3s;overflow:hidden}
.gallery__thumbs button img{width:100%;height:100%;object-fit:contain}
.gallery__thumbs button.is-active,.gallery__thumbs button:hover{border-color:var(--green)}
.attrs{border-top:1px solid var(--line)}
.attrs div{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}
.attrs dt{font-size:14px;font-weight:600;color:var(--ink)}
.attrs dt span{display:block;font-size:11px;color:var(--faint);font-weight:400;letter-spacing:.06em;margin-top:2px;font-family:"Inter",sans-serif}
.attrs dd{font-size:15px;line-height:1.8}
.attrs dd span{display:block;font-size:12.5px;color:var(--faint);margin-top:4px;line-height:1.7;font-family:"Inter",sans-serif}
.series__desc{margin-top:28px;color:var(--muted);font-size:15px}
.series__desc p{margin-bottom:12px}
/* spec table */
.spec{margin-top:48px}
.spec__title{font-size:13px;letter-spacing:.18em;color:var(--green-mid);font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:12px}
.spec__title::before{content:"";width:22px;height:1px;background:currentColor}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);-webkit-overflow-scrolling:touch}
table.spec-table{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
.spec-table th{background:var(--green);color:#fff;font-weight:500;text-align:left;padding:14px 18px;font-size:13px;letter-spacing:.04em;white-space:nowrap}
.spec-table td{padding:13px 18px;border-top:1px solid var(--line);color:var(--text);font-variant-numeric:tabular-nums;font-family:"Inter","PingFang SC",sans-serif}
.spec-table td:first-child{font-weight:600;color:var(--ink)}
.spec-table tbody tr:nth-child(even) td{background:var(--bg-alt)}
.spec-table tbody tr:hover td{background:var(--green-tint)}
/* prev/next */
.pn{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.pn a{display:flex;align-items:center;gap:20px;padding:26px 30px;border:1px solid var(--line);border-radius:var(--radius);transition:box-shadow .5s var(--ease),border-color .5s;background:#fff}
.pn a:hover{box-shadow:var(--shadow-md);border-color:transparent}
.pn a.next{flex-direction:row-reverse;text-align:right}
.pn small{display:block;font-size:11px;letter-spacing:.2em;color:var(--faint);margin-bottom:6px}
.pn b{font-size:17px;color:var(--ink)}
.pn svg{width:20px;height:20px;color:var(--green);flex:none}
/* CTA bar */
.cta{background:var(--green);color:#fff;padding:72px 0}
.cta__inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(24px,2.4vw,34px);margin-bottom:8px}
.cta p{opacity:.8}
.cta__actions{display:flex;gap:14px;flex-wrap:wrap}

/* Solutions -------------------------------------------------------------- */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.sol-detail{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.scene-list li{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}
.scene-list li::before{content:counter(scene,decimal-leading-zero);counter-increment:scene;font-family:"Inter",sans-serif;font-size:12px;letter-spacing:.1em;color:var(--green-mid);flex:none;padding-top:4px;font-weight:600}
.scene-list{counter-reset:scene}
.placeholder{border:1px dashed #C9D3CE;border-radius:var(--radius);padding:48px 32px;text-align:center;color:var(--faint);font-size:14px;background:repeating-linear-gradient(45deg,transparent,transparent 10px,rgba(37,69,58,.025) 10px,rgba(37,69,58,.025) 20px)}
.placeholder b{display:block;color:var(--muted);font-size:16px;margin-bottom:6px;font-weight:600}
.placeholder--tall{min-height:320px;display:flex;flex-direction:column;justify-content:center;align-items:center}

/* Cases ------------------------------------------------------------------ */
.case-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:28px 0}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;height:36px;padding:0 16px;border:1px solid var(--line);border-radius:30px;font-size:13px;color:var(--text);transition:border-color .3s,color .3s,background-color .3s}
.chip:hover{border-color:var(--green);color:var(--green);background:var(--green-tint)}
.case-detail{display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:start}
.case-detail__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius)}
.case-detail__slots{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.case-detail__slots .placeholder{padding:28px 8px;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;font-size:12px}

/* R&D / testing --------------------------------------------------------- */
.methods{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.methods__col{padding:36px 36px 40px;border-right:1px solid var(--line)}
.methods__col:last-child{border-right:0}
.methods__col h3{font-size:18px;margin-bottom:2px}
.methods__col .en{font-size:11px;color:var(--faint);letter-spacing:.08em;text-transform:uppercase;margin-bottom:22px;display:block}
.methods__col li{padding:11px 0;border-top:1px solid var(--line);font-size:15px}
.methods__col li span{display:block;font-size:12px;color:var(--faint);font-family:"Inter",sans-serif}
.equip{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.equip figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:box-shadow .5s var(--ease)}
.equip figure:hover{box-shadow:var(--shadow-md)}
.equip .media{aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.equip img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.equip figure:hover img{transform:scale(1.05)}
.equip figcaption{padding:16px 20px;font-size:15px;font-weight:600;color:var(--ink)}
.equip figcaption span{display:block;font-size:11px;color:var(--faint);font-weight:400;letter-spacing:.04em;font-family:"Inter",sans-serif;margin-top:2px}
.hepa-block{display:grid;grid-template-columns:1.2fr 1fr;gap:72px;align-items:center}
.hepa-block blockquote{font-size:clamp(22px,2vw,30px);font-weight:600;color:#fff;line-height:1.5;margin-top:36px;padding-left:24px;border-left:2px solid rgba(255,255,255,.5)}
.hepa-block blockquote span{display:block;font-size:14px;font-weight:400;opacity:.7;margin-top:10px}
.hepa-block .pts li{padding:16px 20px;border:1px solid rgba(255,255,255,.14);margin-bottom:12px;border-radius:var(--radius);font-size:15px;color:#fff}
.hepa-block .pts li span{display:block;font-size:12px;opacity:.6;font-family:"Inter",sans-serif}
.statements li{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:16px}
.statements li span{display:block;font-size:13px;opacity:.6;margin-top:4px;line-height:1.6}

/* Honors / news ---------------------------------------------------------- */
.honor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.honor-grid .placeholder{aspect-ratio:3/4;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px}
.tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:48px}
.tabs button{border:0;background:transparent;padding:16px 24px;font-size:16px;font-weight:500;color:var(--muted);cursor:pointer;position:relative;transition:color .3s}
.tabs button::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--green);transform:scaleX(0);transition:transform .35s var(--ease)}
.tabs button.is-active{color:var(--green)}
.tabs button.is-active::after{transform:scaleX(1)}
.tab-pane{display:none}
.tab-pane.is-active{display:block}

/* Contact ---------------------------------------------------------------- */
.loc-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.loc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px 40px}
.loc .tag{display:inline-block;font-size:11px;letter-spacing:.2em;color:var(--green-mid);font-weight:600;margin-bottom:12px}
.loc h3{font-size:20px;margin-bottom:18px}
.loc p{font-size:15px;margin-bottom:8px;display:flex;gap:12px}
.loc p .k{color:var(--faint);flex:none;width:48px;font-size:13px;padding-top:2px}
.loc .en-p{font-size:12.5px;color:var(--faint);margin-top:14px;line-height:1.7}
.sales{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.sales li{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);font-size:15px}
.sales li b{font-weight:600;color:var(--ink)}
.sales li a{color:var(--green);font-family:"Inter",sans-serif;letter-spacing:.02em}
.map{height:420px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:relative;background:var(--bg-alt)}
.map .placeholder{position:absolute;inset:0;border:0;border-radius:0;display:flex;flex-direction:column;align-items:center;justify-content:center}

/* Responsive ------------------------------------------------------------- */
@media (max-width:1400px){:root{--gutter:48px}.ind-grid{grid-template-columns:repeat(5,1fr)}.dropdown--cols3{min-width:820px}}
@media (max-width:1180px){
  .pgrid,.honor-grid,.equip{grid-template-columns:repeat(3,1fr)}
  .footer__top{grid-template-columns:1fr 1fr}
  .series__body{grid-template-columns:380px 1fr;gap:40px}
  .header__tel{display:none}
}
@media (max-width:1024px){
  :root{--gutter:32px;--header-h:72px}
  .nav,.header__cta .btn{display:none}
  .burger{display:flex}
  .mnav{display:block}
  .header__logo img{height:38px}
  .section{padding:88px 0}
  .intro,.split,.inquiry,.pd-overview,.sol-detail,.case-detail,.hepa-block{grid-template-columns:1fr;gap:48px}
  .split--rev .split__media{order:0}
  .intro__badge{left:16px}
  .ind-grid{grid-template-columns:repeat(4,1fr)}
  .adv,.plist,.sol-grid,.grid--3,.methods,.sales,.loc-grid{grid-template-columns:1fr 1fr}
  .methods__col{border-right:0;border-bottom:1px solid var(--line)}
  .series__body{grid-template-columns:1fr}
  .hero__stats{display:none}
  .thumb-strip{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  :root{--gutter:22px}
  .section{padding:64px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:36px}
  .hero{height:84vh;min-height:560px}
  .hero h1{font-size:34px}
  .hero__en{letter-spacing:.1em;font-size:13px}
  .hero__scroll{display:none}
  .page-hero,.pd-hero{height:340px}
  .page-hero__content{padding-bottom:40px}
  .adv,.plist,.sol-grid,.grid--3,.grid--2,.methods,.sales,.loc-grid,.equip,.pn,.form__row,.stats,.checks,.case-meta{grid-template-columns:1fr}
  .pgrid,.honor-grid{grid-template-columns:1fr 1fr;gap:12px}
  .pcard__body{padding:14px 14px 16px}.pcard__title{font-size:14px}.pcard__en{display:none}.pcard__arrow{display:none}.pcard__media{padding:12%}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .footer__top{grid-template-columns:1fr;gap:36px;padding:60px 0 40px}
  .form{padding:28px 22px}
  .band__content{padding:72px 0}
  .thumb-strip{margin-top:24px}
  .attrs div{grid-template-columns:1fr;gap:6px}
  .reveal{transform:translateY(14px)}
  .pgroups{grid-template-columns:1fr}
  .pgroup__item{grid-template-columns:1fr}
  .cta__inner{flex-direction:column;align-items:flex-start}
  .gallery__thumbs button{width:64px;height:64px}
  .intro__media::before{display:none}
  .intro__badge{position:static;margin-top:16px;max-width:none}
}

/* home: product grid CTA tile */
.pcard--cta{grid-column:span 3;background:var(--green);border-color:var(--green);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:40px 48px;gap:32px}
.pcard--cta:hover{background:var(--green-deep);transform:translateY(-4px)}
.pcard--cta h3{color:#fff;font-size:26px;margin-bottom:8px}
.pcard--cta p{opacity:.78;font-size:15px;max-width:620px}
.pcard--cta .btn{flex:none}
@media (max-width:1180px){.pcard--cta{grid-column:span 2}}
@media (max-width:720px){.pcard--cta{grid-column:span 2;flex-direction:column;align-items:flex-start;padding:24px}.pcard--cta h3{font-size:20px}}
.series__head .code{display:inline-flex;align-items:center;height:26px;padding:0 10px;border:1px solid var(--green-soft);background:var(--green-tint);border-radius:3px}
.hero h1 .nowrap{white-space:nowrap}

/* dark section followed by CTA: switch CTA to light tint for separation */
.section--dark + .cta{background:var(--green-tint)}
.section--dark + .cta h2{color:var(--ink)}
.section--dark + .cta p{color:var(--muted);opacity:1}
.section--dark + .cta .btn--light{background:var(--green);color:#fff;border-color:var(--green)}
.section--dark + .cta .btn--light:hover{background:var(--green-deep)}
.section--dark + .cta .btn--ghost{color:var(--green);border-color:var(--green)}
.section--dark + .cta .btn--ghost:hover{background:var(--green);color:#fff}
.footer__brand img{height:58px}
.footer__brand .name{display:block;color:#fff;font-size:15px;font-weight:600;letter-spacing:.04em;margin-bottom:6px}
.footer__brand .name-en{display:block;font-size:11px;letter-spacing:.08em;opacity:.55;margin-bottom:18px;font-family:"Inter",sans-serif}

/* ---------- product detail header (replaces image banner) ---------- */
.pd-head{position:relative;background:var(--green);color:#fff;padding:calc(var(--header-h) + 72px) 0 0;overflow:hidden}
.pd-head::before{content:"";position:absolute;right:-10%;top:-30%;width:60%;height:160%;background:radial-gradient(closest-side,rgba(255,255,255,.08),rgba(255,255,255,0));pointer-events:none}
.pd-head::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:var(--bg-alt)}
.pd-head__inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 520px;gap:80px;align-items:end}
.pd-head__text{padding-bottom:168px}
.pd-head .breadcrumb{opacity:.7}
.pd-head .eyebrow{color:rgba(255,255,255,.65)}
.pd-head h1{color:#fff;font-size:clamp(32px,3.4vw,52px);letter-spacing:.01em;margin-bottom:14px}
.pd-head__en{font-size:14px;letter-spacing:.2em;text-transform:uppercase;opacity:.6;margin-bottom:22px}
.pd-head__tag{font-size:17px;opacity:.85;letter-spacing:.04em;margin-bottom:36px}
.pd-head__stats{display:flex;flex-wrap:wrap;gap:0}
.pd-head__stats div{padding:14px 28px 14px 0;margin-right:28px;border-right:1px solid rgba(255,255,255,.18)}
.pd-head__stats div:last-child{border-right:0}
.pd-head__stats small{display:block;font-size:11px;letter-spacing:.14em;opacity:.6;margin-bottom:4px}
.pd-head__stats b{font-size:19px;font-weight:600;color:#fff}
.pd-head__media{background:#fff;border-radius:var(--radius);box-shadow:0 30px 60px rgba(10,20,16,.28);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;padding:6%;margin-bottom:48px;background:linear-gradient(180deg,#FFFFFF 0%,#F3F6F4 100%)}
.pd-head__media img{width:100%;height:100%;object-fit:contain}
.pd-groups{padding-top:88px}
@media (max-width:1024px){.pd-head__inner{grid-template-columns:1fr;gap:40px}.pd-head__text{padding-bottom:0}.pd-head__media{max-width:420px;margin-bottom:0}.pd-head::after{height:60px}}
@media (max-width:720px){.pd-head{padding-top:calc(var(--header-h) + 40px)}.pd-head__stats div{padding:10px 18px 10px 0;margin-right:18px}.pd-head__stats b{font-size:16px}}

/* product photos: blend white backgrounds into the tinted frames */
.pcard__media img,.plist .card__media img,.gallery__main img,.gallery__thumbs img,.pd-head__media img,.pd-overview__media img{mix-blend-mode:multiply}
.pcard__media{padding:6% 8%}

/* ---------- key facts bar under the hero (replaces glass stats box) ---------- */
.keyfacts{position:relative;z-index:5;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:var(--radius);box-shadow:0 18px 50px rgba(23,28,26,.10);margin-top:-76px;border:1px solid var(--line)}
.keyfacts>div{padding:34px 36px 30px;border-right:1px solid var(--line)}
.keyfacts>div:last-child{border-right:0}
.keyfacts b{display:block;font-size:40px;line-height:1;font-weight:600;color:var(--green);letter-spacing:-.02em;margin-bottom:12px;font-family:"Inter","Helvetica Neue",Arial,"PingFang SC",sans-serif}
.keyfacts b i{font-style:normal;font-weight:400;opacity:.55;margin:0 2px}
.keyfacts span{display:block;font-size:16px;font-weight:600;color:var(--ink);margin-bottom:4px}
.keyfacts small{display:block;font-size:12.5px;color:var(--faint);letter-spacing:.02em;line-height:1.6}
.hero__scroll{bottom:110px}
@media (max-width:1024px){.keyfacts{grid-template-columns:1fr 1fr;margin-top:-48px}.keyfacts>div:nth-child(2){border-right:0}.keyfacts>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media (max-width:720px){.keyfacts{margin-top:-32px}.keyfacts>div{padding:22px 20px 18px}.keyfacts b{font-size:30px}.keyfacts span{font-size:14px}.keyfacts small{display:none}}

/* =====================================================================
   V3 · 清爽渐变配色（绿 → 青 → 蓝）、首屏视频、渲染图、打印
   ===================================================================== */
:root{--green:#0F9A86;--green-deep:#0C6E7C;--green-mid:#17A892;--green-soft:#DFF3EE;--green-tint:#F0F9F6;
  --grad:linear-gradient(120deg,#36A851 0%,#12A39A 48%,#1C86D1 100%);
  --grad-deep:linear-gradient(120deg,#1E7A3F 0%,#0E6B78 50%,#14609F 100%);
  --grad-text:linear-gradient(100deg,#2E9E4C 0%,#109A93 55%,#1C86D1 100%)}
.section--dark,.cta,.pd-head,.pcard--cta,.intro__badge{background:var(--grad)}
.section--dark{color:rgba(255,255,255,.88)}
.pcard--cta:hover{background:var(--grad);filter:brightness(1.06)}
.footer{background:var(--grad-deep)}
.btn--primary{background:var(--grad);border-color:transparent}
.btn--primary:hover{background:var(--grad);border-color:transparent;filter:brightness(1.08);box-shadow:0 8px 20px rgba(18,140,170,.28)}
.header--transparent:not(.is-scrolled) .btn--primary{background:#fff}
.spec-table th{background:var(--grad)}
.spec-table tbody tr:hover td{background:#EEF8F6}
.ind-grid{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.18)}
.ind-grid a{background:rgba(10,70,80,.28)}
.ind-grid a:hover{background:rgba(255,255,255,.16)}
.band::after{background:linear-gradient(90deg,rgba(14,96,92,.88) 0%,rgba(16,110,120,.6) 50%,rgba(28,134,209,.22) 100%)}
.page-hero::after{background:linear-gradient(0deg,rgba(12,70,80,.82) 0%,rgba(12,70,80,.35) 55%,rgba(20,90,120,.25) 100%)}
.hero::after{background:linear-gradient(90deg,rgba(10,60,70,.74) 0%,rgba(10,70,75,.42) 42%,rgba(20,90,120,.08) 78%),linear-gradient(180deg,rgba(10,40,45,.5) 0%,rgba(10,40,45,0) 26%),linear-gradient(0deg,rgba(10,40,45,.55) 0%,rgba(10,40,45,0) 38%)}
.keyfacts b{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.keyfacts b i{color:var(--muted);opacity:.6}
.eyebrow::before,.spec__title::before{background:var(--grad)}
.adv__item{border-top:0;position:relative}
.adv__item::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--grad);border-radius:3px 3px 0 0}
.stats div{border-left-color:transparent;position:relative}
.stats div::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad)}
.section--dark + .cta{background:var(--green-tint)}
.section--dark + .cta .btn--light{background:var(--grad);border-color:transparent}
.hepa-block .pts li,.card--dark{border-color:rgba(255,255,255,.28)}
.pd-head::before{background:radial-gradient(closest-side,rgba(255,255,255,.14),rgba(255,255,255,0))}
.pd-head__media--render{padding:0;overflow:hidden;aspect-ratio:4/5;background:#fff}
.pd-head__media--render img{width:100%;height:100%;object-fit:cover;mix-blend-mode:normal}
.gallery--render .gallery__main{aspect-ratio:4/5;padding:0;background:#fff}
.gallery--render .gallery__main img{object-fit:cover;mix-blend-mode:normal}
.gallery--render .gallery__thumbs button{padding:0;overflow:hidden}
.gallery--render .gallery__thumbs img{object-fit:cover;mix-blend-mode:normal}
/* hero video */
.hero__bg{z-index:0;animation:none}
.hero__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;will-change:transform}
.hero::after{z-index:1}
.hero__content,.hero__scroll{z-index:2}
@media (max-width:1024px){.pd-head__media--render{max-width:360px}}
/* print / PDF proof */
@media print{
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .header{position:absolute}.hero__video,.backtop,.mnav,.hero__scroll{display:none!important}
  .hero,.page-hero,.band{animation:none}.hero__bg,.page-hero__bg{animation:none;transform:none}
  a[href]::after{content:""}
}

.hero__video{opacity:0;transition:opacity 1.2s ease}
.hero__video.is-playing{opacity:1}

/* =====================================================================
   V4 · 首页宣传片首屏：文字固定在左下角，视频画面中部留空
   ===================================================================== */
.hero--video{align-items:flex-end}
.hero--video::after{background:
  linear-gradient(180deg,rgba(6,34,40,.55) 0%,rgba(6,34,40,.18) 14%,rgba(6,34,40,0) 26%),
  radial-gradient(115% 95% at 0% 100%,rgba(6,38,44,.80) 0%,rgba(6,38,44,.50) 34%,rgba(6,38,44,0) 64%),
  linear-gradient(0deg,rgba(6,38,44,.35) 0%,rgba(6,38,44,0) 30%)}
.hero--video .hero__content{max-width:var(--container);padding-top:0;padding-bottom:132px;text-shadow:0 2px 18px rgba(0,20,25,.28)}
.hero--video .hero__content>*{max-width:640px}
.hero--video .hero__eyebrow{margin-bottom:20px;font-size:12px}
.hero--video h1{font-size:clamp(34px,3.6vw,56px);margin-bottom:16px}
.hero--video .hero__en{font-size:clamp(12px,.95vw,15px);margin-bottom:34px}
.hero--video .btn{text-shadow:none}
.hero__sound{position:absolute;z-index:3;right:var(--gutter);bottom:132px;display:inline-flex;align-items:center;gap:10px;height:44px;padding:0 18px 0 14px;border-radius:22px;border:1px solid rgba(255,255,255,.55);background:rgba(6,38,44,.28);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);color:#fff;font-size:13px;letter-spacing:.06em;cursor:pointer;transition:background-color .3s,border-color .3s}
.hero__sound:hover{background:rgba(6,38,44,.45);border-color:#fff}
.hero__sound svg{width:18px;height:18px}
.hero__sound .ic-on{display:none}
.hero__sound.is-on .ic-on{display:block}
.hero__sound.is-on .ic-off{display:none}
.keyfacts{margin-top:-56px}
/* 行业解决方案页：沿用原首页光热电站动画作为首行动态横幅 */
.page-hero--video{height:600px}
.page-hero--video .page-hero__bg{animation:none;transform:none}
.page-hero__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;opacity:0;transition:opacity 1.2s ease}
.page-hero__video.is-playing{opacity:1}
.page-hero::after{z-index:1}
.page-hero__lead{margin-top:18px;font-size:17px;opacity:.88;max-width:620px}
@media (max-width:1024px){.hero--video .hero__content{padding-bottom:104px}.hero__sound{bottom:104px}.keyfacts{margin-top:-40px}.page-hero--video{height:480px}}
@media (max-width:720px){
  .hero--video .hero__content{padding-bottom:84px}
  .hero--video h1{font-size:30px}
  .hero__sound{top:calc(var(--header-h) + 14px);bottom:auto;right:16px;height:36px;padding:0 12px}
  .hero__sound-txt{display:none}
  .keyfacts{margin-top:-28px}
  .page-hero--video{height:380px}.page-hero__lead{font-size:14px}
}
@media print{.page-hero__video,.hero__sound{display:none!important}}

/* V4.1 · 文字压到左下角，与 logo 左对齐；底部渐变保证任何画面下都清晰 */
.hero--video::after{background:
  linear-gradient(180deg,rgba(6,34,40,.55) 0%,rgba(6,34,40,.16) 13%,rgba(6,34,40,0) 24%),
  linear-gradient(0deg,rgba(6,34,40,.72) 0%,rgba(6,34,40,.42) 22%,rgba(6,34,40,.12) 40%,rgba(6,34,40,0) 52%),
  radial-gradient(70% 70% at 0% 100%,rgba(6,34,40,.45) 0%,rgba(6,34,40,0) 70%)}
.hero--video .hero__content{padding-bottom:108px}
.hero--video .hero__content>*{max-width:560px}
.hero--video .hero__eyebrow{opacity:.92;font-weight:500;margin-bottom:16px}
.hero--video h1{font-size:clamp(32px,3.1vw,50px);line-height:1.2;margin-bottom:14px}
.hero--video .hero__en{opacity:.9;margin-bottom:28px;letter-spacing:.16em}
.hero__sound{bottom:108px}
@media (max-width:1024px){.hero--video .hero__content{padding-bottom:96px}.hero__sound{bottom:96px}}
@media (max-width:720px){.hero--video .hero__content{padding-bottom:72px}.hero--video h1{font-size:28px}}
.hero--video .hero__content{width:100%;max-width:1680px}
@media (max-width:720px){.hero--video .hero__actions{flex-wrap:nowrap;gap:10px}.hero--video .hero__actions .btn{height:46px;padding:0 18px;font-size:14px}.hero--video .hero__eyebrow{font-size:10px;letter-spacing:.18em}}

/* V5 · 片尾 slogan 段（最后约 5.5 秒）：页面文字让位，视频片尾完整呈现 */
.hero--video::after{background:linear-gradient(180deg,rgba(6,34,40,.55) 0%,rgba(6,34,40,.16) 13%,rgba(6,34,40,0) 24%)}
.hero__shade{position:absolute;inset:0;z-index:1;pointer-events:none;transition:opacity .9s ease;background:
  linear-gradient(0deg,rgba(6,34,40,.72) 0%,rgba(6,34,40,.42) 22%,rgba(6,34,40,.12) 40%,rgba(6,34,40,0) 52%),
  radial-gradient(70% 70% at 0% 100%,rgba(6,34,40,.45) 0%,rgba(6,34,40,0) 70%)}
.hero--video .hero__eyebrow,.hero--video h1,.hero--video .hero__en{transition:opacity .9s ease}
.hero--video .hero__bg{transition:opacity .9s ease}
.hero--video .hero__video{transition:opacity 1.2s ease,transform .9s ease}
.hero--outro{background:#e9f1f6}
.hero--outro .hero__bg{opacity:0}
.hero--outro .hero__shade{opacity:.18}
.hero--outro .hero__eyebrow,.hero--outro h1,.hero--outro .hero__en{opacity:0}
.hero--outro .hero__video{transform:none!important}
.hero--video .btn--ghost{transition:background-color .35s,color .9s,border-color .9s}
.hero--outro .btn--ghost{color:#1C5F86;border-color:rgba(28,95,134,.55)}
.hero--outro .btn--ghost:hover{background:rgba(28,95,134,.08)}
.hero--outro .hero__sound{background:rgba(28,95,134,.55)}