/* ==========================================================================
   顺意精密模具 · 中文站样式
   品牌色：青 #65C8D0 / 墨 #242827
   ========================================================================== */

:root{
  --ink:#1d2422;
  --ink2:#242827;
  --ink3:#171c1b;
  --gray:#5f6d6b;
  --gray2:#8d9a98;
  --teal:#65c8d0;
  --teal-d:#3199a4;
  --teal-l:#eef8fa;
  --line:#e5ecec;
  --soft:#f6f9f9;
  --white:#fff;
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  color:var(--ink);
  background:var(--white);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--teal);color:#06302f}

.wrap{width:min(var(--max),calc(100% - 48px));margin:0 auto}
section[id]{scroll-margin-top:92px}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--ink3);
  color:rgba(255,255,255,.62);
  font-size:12.5px;
  letter-spacing:.02em;
}
.topbar__in{display:flex;align-items:center;justify-content:space-between;height:38px}
.topbar__l span{color:rgba(255,255,255,.5)}
.topbar__r{display:flex;align-items:center;gap:22px}
.topbar__r a{display:inline-flex;align-items:center;gap:7px;color:rgba(255,255,255,.78)}
.topbar__r a:hover{color:var(--teal)}
.ic{width:14px;height:14px;fill:currentColor;flex:none}
.topbar__lang{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.3)}
.topbar__lang a{color:rgba(255,255,255,.55)}
.topbar__lang a.on{color:var(--teal)}
.topbar__lang i{font-style:normal;color:rgba(255,255,255,.2)}

/* ---------- 导航 ---------- */
.hdr{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.hdr.is-stuck{box-shadow:0 8px 30px rgba(18,40,40,.08)}
.hdr__in{display:flex;align-items:center;gap:32px;height:78px}
.logo{display:flex;align-items:center;gap:12px;flex:none}
.logo img{height:42px;width:auto}
.logo__txt{display:flex;flex-direction:column;line-height:1.2;border-left:1px solid var(--line);padding-left:12px}
.logo__txt b{font-size:16px;letter-spacing:.06em}
.logo__txt i{font-style:normal;font-size:9.5px;letter-spacing:.14em;color:var(--gray2)}

.nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav a{
  position:relative;font-size:14.5px;color:#3c4a48;padding:6px 0;white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--teal);
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav a:hover,.nav a.active{color:var(--teal-d)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}

.hdr__cta{flex:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border:1px solid transparent;border-radius:2px;
  font-size:14px;letter-spacing:.02em;cursor:pointer;
  transition:all .28s var(--ease);
}
.btn--teal{background:var(--teal);color:#06302f;font-weight:700}
.btn--teal:hover{background:var(--teal-d);color:#fff;transform:translateY(-1px)}
.btn--ghost{border-color:rgba(29,36,34,.22);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn--dark{background:var(--ink);color:#fff;font-weight:600}
.btn--dark:hover{background:var(--teal);color:#06302f}

.burger{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:2px;padding:11px 10px;flex-direction:column;justify-content:space-between;cursor:pointer}
.burger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .2s}

/* ---------- 首屏 ---------- */
.hero{position:relative;overflow:hidden;background:#fff;isolation:isolate}
.hero__bg{
  position:absolute;inset:0;z-index:-2;
  background:url("../img/hero.jpg") right center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(96deg,#fff 0%,rgba(255,255,255,.98) 26%,rgba(255,255,255,.86) 44%,rgba(255,255,255,.38) 62%,rgba(255,255,255,0) 78%),
    linear-gradient(to bottom,rgba(255,255,255,.5),rgba(255,255,255,0) 30%);
}
.hero__in{padding:92px 0 68px;min-height:620px;display:flex;flex-direction:column;justify-content:center}
.hero__copy{max-width:620px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;letter-spacing:.2em;color:var(--teal-d);font-weight:600;
  text-transform:uppercase;
}
.eyebrow i{display:block;width:26px;height:1px;background:var(--teal)}
.eyebrow--light{color:var(--teal)}
.hero h1{
  margin:22px 0 20px;
  font-size:clamp(34px,4.2vw,58px);
  line-height:1.16;
  letter-spacing:-.02em;
}
.hero__sub{max-width:560px;font-size:15.5px;line-height:1.95;color:#4a5856}
.hero__sub strong{color:var(--ink);font-weight:700}
.hero__btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero__trust{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:30px}
.hero__trust li{position:relative;padding-left:16px;font-size:12.5px;color:#4a5856;letter-spacing:.02em}
.hero__trust li::before{
  content:"";position:absolute;left:0;top:50%;width:6px;height:6px;margin-top:-3px;
  border-radius:50%;background:var(--teal);
}

/* ---------- 关键数据条 ---------- */
.band{background:#fff;border-bottom:1px solid var(--line)}
.hero__stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;max-width:none;margin-left:auto;margin-right:auto;
}
.stat{padding:30px 26px 30px 0}
.stat + .stat{border-left:1px solid var(--line);padding-left:30px}
.stat b{display:block;font-size:36px;line-height:1;letter-spacing:-.02em;color:var(--ink)}
.stat b span{font-size:14px;font-weight:600;margin-left:4px;letter-spacing:0;color:var(--teal-d)}
.stat em{display:block;margin-top:10px;font-style:normal;font-size:12.5px;color:var(--gray);letter-spacing:.02em}

.hero__scroll{position:absolute;left:50%;bottom:22px;width:1px;height:46px;background:rgba(29,36,34,.12);overflow:hidden}
.hero__scroll span{position:absolute;left:0;top:-46px;width:1px;height:46px;background:var(--teal);animation:drop 2.2s infinite}
@keyframes drop{0%{top:-46px}60%,100%{top:46px}}

/* ---------- 区块通用 ---------- */
.sec{padding:96px 0;position:relative}
.sec--soft{background:var(--soft)}
.sec--dark{background:var(--ink2);color:#d9e3e1}
.sec--dark h2{color:#fff}
.sec--dark .sec__desc{color:rgba(255,255,255,.6)}

.sec__hd{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:end;margin-bottom:54px}
.sec__hd h2{margin-top:16px;font-size:clamp(25px,2.5vw,36px)}
.sec__desc{font-size:14.5px;line-height:1.95;color:var(--gray);max-width:460px;justify-self:end}

/* ---------- 产品卡 ---------- */
.prod{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:3px;overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-5px);box-shadow:0 22px 44px rgba(20,50,50,.09);border-color:rgba(101,200,208,.65)}
.card__img{aspect-ratio:4/3;overflow:hidden;background:#f2f5f5}
.card__img img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.card:hover .card__img img{transform:scale(1.05)}
.card__body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.card__tag{font-size:10.5px;letter-spacing:.14em;color:var(--teal-d);text-transform:uppercase;font-weight:600}
.card__body h3{margin:10px 0 10px;font-size:19px}
.card__body p{font-size:13.8px;line-height:1.85;color:var(--gray);flex:1}
.card__spec{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.card__spec span{
  font-size:11.5px;padding:4px 9px;background:var(--soft);border:1px solid var(--line);
  border-radius:2px;color:#4d5c5a;letter-spacing:.01em;
}
.card__link{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  font-size:13px;color:var(--teal-d);font-weight:600;
}
.card__link span{transition:transform .3s var(--ease)}
.card__link:hover span{transform:translateX(5px)}

/* ---------- 关于我们 ---------- */
.about{display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.about__media{position:relative;padding-bottom:78px}
.about__main-wrap{position:relative;margin:0;overflow:hidden;border-radius:3px;background:#eef2f2}
.about__main{width:100%;aspect-ratio:4/3;object-fit:cover}
.about__main-wrap figcaption{
  position:absolute;left:14px;top:14px;padding:5px 11px;border-radius:2px;
  background:rgba(15,30,28,.62);color:#fff;font-size:11.5px;letter-spacing:.08em;
  backdrop-filter:blur(4px);
}
.about__sub-wrap{
  position:absolute;right:-16px;bottom:0;width:54%;margin:0;
  border:6px solid #fff;border-radius:3px;overflow:hidden;
  box-shadow:0 20px 44px rgba(16,44,44,.14);
}
.about__sub{width:100%;aspect-ratio:1/1;object-fit:cover}
.about__badge{
  position:absolute;left:0;bottom:22px;background:var(--teal);color:#06302f;
  padding:16px 20px;min-width:132px;
}
.about__badge b{display:block;font-size:34px;line-height:1;letter-spacing:-.03em}
.about__badge b sup{font-size:15px;top:-.8em}
.about__badge span{display:block;margin-top:5px;font-size:12px;letter-spacing:.06em}

.about__copy h2{margin:16px 0 22px;font-size:clamp(25px,2.5vw,36px)}
.about__copy p{font-size:14.4px;line-height:1.95;color:var(--gray);margin-bottom:14px}
.about__copy .lead{font-size:16px;color:var(--ink);font-weight:600;line-height:1.8}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;margin:26px 0 30px}
.checks li{position:relative;padding-left:26px;font-size:13.8px;color:#33413f}
.checks li::before{
  content:"";position:absolute;left:0;top:7px;width:14px;height:8px;
  border-left:2px solid var(--teal-d);border-bottom:2px solid var(--teal-d);
  transform:rotate(-45deg);border-radius:1px;
}

/* ---------- 工厂实景 ---------- */
.plant{display:grid;grid-template-columns:.92fr 1.08fr;gap:44px;align-items:stretch}
.plant__shot{
  position:relative;margin:0;overflow:hidden;border-radius:3px;background:#eef2f2;
  min-height:520px;
}
.plant__shot img{width:100%;height:100%;object-fit:cover;display:block}
.plant__shot figcaption{
  position:absolute;left:0;right:0;bottom:0;color:#fff;
  padding:48px 24px 22px;
  background:linear-gradient(to top,rgba(15,30,28,.92),rgba(15,30,28,0));
  display:flex;flex-direction:column;gap:4px;
}
.plant__shot figcaption b{font-size:15.5px}
.plant__shot figcaption span{font-size:12.3px;color:rgba(255,255,255,.72);letter-spacing:.04em}

.plant__side{display:grid;grid-template-rows:auto 1fr;gap:22px}
.plant__card{
  background:#fff;border:1px solid var(--line);border-radius:3px;
  padding:24px 26px 26px;display:flex;flex-direction:column;
}
.plant__card-hd{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line);
}
.plant__card-hd h3{font-size:17px}
.plant__card-hd span{
  flex:none;font-size:11.5px;letter-spacing:.06em;color:var(--teal-d);font-weight:700;
}
.plant__tags{display:flex;flex-wrap:wrap;gap:8px}
.plant__tags li{
  font-size:12.6px;padding:6px 12px;border:1px solid var(--line);
  background:var(--soft);border-radius:2px;color:#33413f;
}
.plant__qc{display:grid;gap:14px}
.plant__qc li{
  display:flex;flex-direction:column;gap:3px;
  padding-left:14px;border-left:2px solid rgba(101,200,208,.45);
}
.plant__qc b{font-size:13.5px;color:var(--ink)}
.plant__qc span{font-size:12.7px;line-height:1.8;color:var(--gray)}

.plant__metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  margin-top:54px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.plant__metrics div{padding:26px 0}
.plant__metrics div + div{border-left:1px solid var(--line);padding-left:30px}
.plant__metrics b{display:block;font-size:28px;line-height:1;letter-spacing:-.02em}
.plant__metrics b span{font-size:12.5px;font-weight:600;color:var(--teal-d);margin-left:3px;letter-spacing:0}
.plant__metrics em{display:block;margin-top:9px;font-style:normal;font-size:12.3px;color:var(--gray)}

/* ---------- 制造实力（深色） ---------- */
.sec--dark::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:
    radial-gradient(900px 400px at 88% 0%,rgba(101,200,208,.10),transparent 60%),
    radial-gradient(700px 400px at 0% 100%,rgba(101,200,208,.06),transparent 65%);
}
.sec--dark .wrap{position:relative;z-index:1}
.why{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:rgba(255,255,255,.09)}
.why__item{
  position:relative;background:var(--ink2);padding:40px 34px 42px;
  transition:background .35s var(--ease);
}
.why__item:hover{background:#2a3230}
.why__no{position:absolute;right:28px;top:26px;font-size:38px;font-weight:800;letter-spacing:-.04em;color:rgba(255,255,255,.05);line-height:1}
.why__ic{width:38px;height:38px;margin-bottom:22px}
.why__ic svg{width:100%;height:100%;fill:none;stroke:var(--teal);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.why__item h3{color:#fff;font-size:17px;margin-bottom:12px}
.why__item p{font-size:13.6px;line-height:1.9;color:rgba(255,255,255,.58)}

/* ---------- 技术服务 ---------- */
.svc{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}
.step{padding:26px 0 28px;border-top:1px solid var(--line);position:relative}
.step:first-child{border-top:none;padding-top:0}
.step__no{font-size:11.5px;letter-spacing:.16em;color:var(--teal-d);font-weight:700}
.step h3{font-size:18.5px;margin:8px 0 10px}
.step p{font-size:13.9px;line-height:1.9;color:var(--gray);max-width:480px}
.step::after{
  content:"";position:absolute;left:0;top:-1px;height:1px;width:0;background:var(--teal);
  transition:width .5s var(--ease);
}
.step:hover::after{width:100%}

.svc__media{position:relative}
.svc__media img{width:100%;height:100%;min-height:400px;object-fit:cover;border-radius:3px}
.svc__note{
  position:absolute;left:0;right:0;bottom:0;
  background:linear-gradient(to top,rgba(20,40,38,.92),rgba(20,40,38,0));
  color:#fff;padding:38px 26px 22px;
  display:flex;flex-direction:column;gap:4px;
}
.svc__note b{font-size:16px}
.svc__note span{font-size:12.5px;color:rgba(255,255,255,.7);letter-spacing:.06em}

.flow{margin-top:74px;border:1px solid var(--line);padding:30px 34px;border-radius:3px;background:#fff}
.flow__t{font-size:11.5px;letter-spacing:.18em;color:var(--teal-d);font-weight:700;margin-bottom:20px}
.flow__list{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:0}
.flow__list li{position:relative;display:flex;align-items:center;gap:11px;padding-right:14px}
.flow__list li:not(:last-child)::after{
  content:"";position:absolute;right:13px;top:50%;width:16px;height:1px;background:var(--line);
}
.flow__list b{
  flex:none;width:34px;height:34px;border-radius:50%;border:1px solid rgba(101,200,208,.6);
  display:grid;place-items:center;font-size:12px;color:var(--teal-d);
}
.flow__list span{font-size:13.2px;color:#33413f;white-space:nowrap}

/* ---------- 开发件业务 ---------- */
.rnd{
  margin-top:26px;padding:34px 36px 36px;border-radius:3px;
  background:var(--soft);border:1px solid var(--line);
}
.rnd__hd{max-width:760px}
.rnd__hd h3{margin:14px 0 12px;font-size:20px}
.rnd__hd p{font-size:13.6px;line-height:1.95;color:var(--gray)}
.rnd__steps{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:26px;
  margin-top:28px;padding-top:26px;border-top:1px solid var(--line);
}
.rnd__steps li{position:relative;padding-top:16px;border-top:2px solid var(--line)}
.rnd__steps li::before{
  content:"";position:absolute;left:0;top:-2px;width:34px;height:2px;background:var(--teal);
}
.rnd__steps b{display:block;font-size:11px;letter-spacing:.16em;color:var(--teal-d);font-weight:700;margin-bottom:8px}
.rnd__steps h4{font-size:14.5px;margin-bottom:6px}
.rnd__steps span{display:block;font-size:12.4px;line-height:1.75;color:var(--gray)}

/* ---------- 应用领域 ---------- */
.apps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.app{position:relative;overflow:hidden;border-radius:3px;aspect-ratio:3/4;background:#dfe6e6}
.app img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.app:hover img{transform:scale(1.06)}
.app__mask{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(15,30,28,.9) 0%,rgba(15,30,28,.35) 42%,rgba(15,30,28,0) 72%);
  transition:opacity .4s var(--ease);
}
.app__txt{position:absolute;left:0;right:0;bottom:0;padding:24px 22px;color:#fff}
.app__txt h3{font-size:17px;margin-bottom:8px}
.app__txt p{font-size:12.8px;line-height:1.75;color:rgba(255,255,255,.72)}
.app-note{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:26px;padding:18px 26px;border:1px dashed rgba(50,153,164,.45);border-radius:3px;
  font-size:13.8px;color:var(--gray);
}
.app-note a{color:var(--teal-d);font-weight:600}

/* ---------- 新闻 ---------- */
.news{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.post{display:grid;grid-template-columns:44% 1fr;gap:24px;align-items:start}
.post__img{display:block;aspect-ratio:4/3;overflow:hidden;border-radius:3px;background:#f2f5f5}
.post__img img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.post:hover .post__img img{transform:scale(1.05)}
.post__body time{font-size:11.5px;letter-spacing:.12em;color:var(--teal-d);font-weight:600}
.post__body h3{font-size:17px;line-height:1.6;margin:10px 0 10px}
.post__body p{font-size:13.4px;line-height:1.85;color:var(--gray)}
.post .card__link{margin-top:14px}

/* ---------- 联系区 ---------- */
.cta__in{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}
.cta__copy h2{margin:18px 0 18px;font-size:clamp(24px,2.4vw,34px);line-height:1.45}
.cta__copy > p{font-size:14.2px;line-height:1.95;color:rgba(255,255,255,.6);max-width:460px}
.info{margin-top:36px;display:grid;gap:20px}
.info li{display:flex;gap:16px;align-items:flex-start}
.info__ic{
  flex:none;width:38px;height:38px;border:1px solid rgba(101,200,208,.35);
  display:grid;place-items:center;border-radius:2px;
}
.info__ic svg{width:17px;height:17px;fill:var(--teal)}
.info em{display:block;font-style:normal;font-size:11.5px;letter-spacing:.12em;color:rgba(255,255,255,.4);margin-bottom:3px}
.info a,.info span{font-size:14.5px;color:#e6efee}
.info a:hover{color:var(--teal)}
.info a.info__alt{display:block;margin-top:2px;font-size:12.8px;color:rgba(255,255,255,.55)}

.form{
  background:#fff;padding:34px 34px 30px;border-radius:3px;color:var(--ink);
  box-shadow:0 30px 60px rgba(0,0,0,.18);
}
.form__hd{display:flex;flex-direction:column;gap:4px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.form__hd b{font-size:19px}
.form__hd span{font-size:12.5px;color:var(--gray2)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{display:block;font-size:12.5px;color:#43514f;margin-bottom:14px}
.form label i{font-style:normal;color:#e0724a}
.form input,.form select,.form textarea{
  width:100%;margin-top:6px;border:1px solid var(--line);background:#fbfcfc;
  border-radius:2px;padding:11px 12px;font-size:13.5px;outline:none;
  transition:border-color .25s,background .25s,box-shadow .25s;
}
.form input::placeholder,.form textarea::placeholder{color:#a8b3b1}
.form input:focus,.form select:focus,.form textarea:focus{
  border-color:var(--teal);background:#fff;box-shadow:0 0 0 3px rgba(101,200,208,.16);
}
.form textarea{resize:vertical;min-height:96px}
.form__full{display:block}
.form__btn{width:100%;height:48px;margin-top:4px}
.form__tip{margin-top:12px;font-size:11.8px;color:var(--gray2);text-align:center}
.form__ok{
  display:none;margin-top:14px;padding:12px 14px;background:var(--teal-l);
  border:1px solid rgba(101,200,208,.5);color:#1c6b73;font-size:13px;border-radius:2px;
}
.form__ok.show{display:block}

/* ---------- 页脚 ---------- */
.ft{background:var(--ink3);color:rgba(255,255,255,.6)}
.ft__in{display:grid;grid-template-columns:1.35fr .8fr .7fr 1.15fr;gap:38px;padding:62px 0 52px}
.ft__brand img{height:44px;width:auto;filter:brightness(0) invert(1);opacity:.92}
.ft__brand p{margin-top:16px;font-size:13.5px;line-height:1.85}
.ft__brand p span{font-size:11.5px;letter-spacing:.04em;color:rgba(255,255,255,.35)}
.ft__desc{margin-top:12px;font-size:12.8px;color:rgba(255,255,255,.42);line-height:1.8}
.ft__col h4{font-size:13px;color:#fff;letter-spacing:.08em;margin-bottom:16px;font-weight:700}
.ft__col a,.ft__col p{display:block;font-size:13px;line-height:2.1;color:rgba(255,255,255,.55)}
.ft__col a:hover{color:var(--teal)}
.ft__col--contact p{line-height:2}
.ft__bar{border-top:1px solid rgba(255,255,255,.08)}
.ft__bar-in{display:flex;align-items:center;justify-content:space-between;gap:20px;height:58px;font-size:12px;color:rgba(255,255,255,.4)}
.ft__links{display:flex;gap:20px}
.ft__links a:hover{color:var(--teal)}

/* ---------- 回到顶部 ---------- */
.totop{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#fff;display:grid;place-items:center;font-size:17px;
  opacity:0;visibility:hidden;transform:translateY(10px);z-index:70;
  transition:all .35s var(--ease);
}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--teal);color:#06302f}

/* ---------- 滚动动效 ---------- */
/* 只有 JS 可用时才隐藏，避免脚本失效导致内容不可见 */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1120px){
  .nav{gap:18px}
  .nav a{font-size:13.5px}
  .hdr__in{gap:20px}
  .logo__txt{display:none}
}

@media (max-width:980px){
  .sec{padding:72px 0}
  .hero__in{min-height:520px;padding-top:70px}
  .hero::before{background:linear-gradient(to bottom,rgba(255,255,255,.97) 0%,rgba(255,255,255,.9) 45%,rgba(255,255,255,.72) 100%)}
  .hero__bg{background-position:70% center}
  .sec__hd{grid-template-columns:1fr;gap:18px;margin-bottom:40px}
  .sec__desc{justify-self:start;max-width:620px}
  .prod{grid-template-columns:1fr 1fr}
  .about,.svc,.cta__in{grid-template-columns:1fr;gap:44px}
  .about__media{padding-bottom:0}
  .about__main{aspect-ratio:16/10}
  .about__sub-wrap{display:none}
  .about__badge{left:0;bottom:0}
  .plant{grid-template-columns:1fr;gap:26px}
  .plant__shot{min-height:0}
  .plant__shot img{aspect-ratio:16/10;height:auto}
  .plant__metrics{margin-top:38px}
  .rnd__steps{grid-template-columns:1fr 1fr;gap:20px}
  .why{grid-template-columns:1fr 1fr}
  .apps{grid-template-columns:1fr 1fr}
  .news{grid-template-columns:1fr;gap:34px}
  .flow__list{grid-template-columns:1fr 1fr;gap:16px 0}
  .flow__list li:not(:last-child)::after{display:none}
  .ft__in{grid-template-columns:1fr 1fr;gap:36px}
  .svc__media img{min-height:320px}

  /* 移动导航 */
  .nav{
    position:fixed;left:0;right:0;top:0;z-index:90;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:84px 24px 24px;
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform .45s var(--ease),opacity .3s;box-shadow:0 20px 40px rgba(0,0,0,.12);
    margin-left:0;
  }
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav a::after{display:none}
  .burger{display:flex;margin-left:auto;position:relative;z-index:95}
  .burger.on span:nth-child(1){transform:translateY(9px) rotate(45deg)}
  .burger.on span:nth-child(2){opacity:0}
  .burger.on span:nth-child(3){transform:translateY(-9px) rotate(-45deg)}
  .hdr__cta{display:none}
}

@media (max-width:640px){
  .wrap{width:calc(100% - 36px)}
  .topbar__l{display:none}
  .topbar__in{height:34px;justify-content:space-between}
  .topbar__r{gap:14px;font-size:11.5px}
  .topbar__r a[href^="mailto"]{display:none}
  .hdr__in{height:64px}
  .logo img{height:34px}

  /* 手机端：首屏图片降为淡背景，保证文字可读 */
  .hero__bg{opacity:.45;background-position:58% center}
  .hero::before{background:linear-gradient(180deg,rgba(255,255,255,.97),rgba(255,255,255,.9))}
  .hero__in{padding-top:52px;min-height:0;padding-bottom:44px}
  .hero h1{font-size:30px}
  .hero__sub{font-size:14px}
  .hero__btns{gap:10px}
  .btn{height:42px;padding:0 20px;font-size:13.5px}
  .hero__stats{grid-template-columns:1fr 1fr}
  .stat{padding:20px 14px 20px 0}
  .stat:nth-child(3){border-left:none;padding-left:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .stat + .stat{padding-left:14px}
  .stat b{font-size:26px}
  .prod,.apps,.why{grid-template-columns:1fr}
  .plant__shot img{aspect-ratio:4/3}
  .plant__card{padding:20px 18px 22px}
  .plant__metrics{grid-template-columns:1fr 1fr}
  .plant__metrics div{padding:18px 0}
  .plant__metrics div:nth-child(3){border-left:none;padding-left:0}
  .plant__metrics div:nth-child(1),.plant__metrics div:nth-child(2){border-bottom:1px solid var(--line)}
  .plant__metrics b{font-size:24px}
  .rnd{padding:24px 20px 26px}
  .rnd__steps{grid-template-columns:1fr;gap:16px}
  .hero__trust{gap:8px 20px;margin-top:24px}
  .checks{grid-template-columns:1fr}
  .post{grid-template-columns:1fr}
  .form{padding:24px 20px}
  .form__row{grid-template-columns:1fr}
  .flow{padding:22px 18px}
  .flow__list{grid-template-columns:1fr}
  .ft__in{grid-template-columns:1fr;gap:30px;padding:46px 0 38px}
  .ft__bar-in{flex-direction:column;justify-content:center;gap:6px;height:auto;padding:16px 0;text-align:center}
  .app{aspect-ratio:4/3}
  .app-note{padding:16px 18px;font-size:12.8px}
  .totop{right:14px;bottom:14px;width:40px;height:40px}
}

/* 页脚联系方式列微调 */
.ft__col--contact p{font-size:12.5px;line-height:1.95}