/* ============================================================
   中山极渡元科技有限公司 · 官网样式
   主题：蓝橙活力（Blue #1668E3 / Orange #FF7A18）
   ============================================================ */

:root{
  --blue:        #1668E3;
  --blue-2:      #2E86FF;
  --blue-deep:   #0B1B3A;
  --navy:        #0B1B3A;
  --navy-2:      #132a52;
  --orange:      #FF7A18;
  --orange-2:    #FFA04D;
  --ink:         #1B2437;
  --ink-2:       #4A566B;
  --ink-3:       #7A869B;
  --line:        #E8ECF4;
  --soft:        #F5F8FD;
  --white:       #FFFFFF;
  --radius:      18px;
  --radius-sm:   12px;
  --shadow:      0 18px 50px rgba(16,42,82,.10);
  --shadow-lg:   0 26px 70px rgba(11,27,58,.16);
  --grad:        linear-gradient(120deg,var(--blue-2) 0%, var(--blue) 45%, var(--orange) 100%);
  --maxw:        1200px;
  --navh:        76px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--navh)}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;font-size:15px;font-weight:600;
  border:1.5px solid transparent;cursor:pointer;transition:.28s cubic-bezier(.4,0,.2,1);
  white-space:nowrap;
}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(22,104,227,.28)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(22,104,227,.38)}
.btn--ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn--sm{padding:9px 20px;font-size:14px}
.btn--lg{padding:16px 38px;font-size:16px}

/* ---------------- 导航 ---------------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--navh);
  background:rgba(255,255,255,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:.3s;
}
.nav.is-scrolled{background:rgba(255,255,255,.95);border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(16,42,82,.06)}
.nav__inner{height:var(--navh);display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo__mark{height:46px;width:auto;display:block;border-radius:6px;object-fit:contain}
.logo__text{display:flex;flex-direction:column;line-height:1.25}
.logo__text strong{font-size:19px;letter-spacing:.5px;color:var(--navy)}
.logo__text em{font-style:normal;font-size:10px;letter-spacing:1.4px;color:var(--ink-3);text-transform:uppercase}
.nav__menu{display:flex;align-items:center;gap:34px}
.nav__link{font-size:15px;color:var(--ink-2);font-weight:500;position:relative;transition:.25s}
.nav__link::after{
  content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;
  background:var(--grad);transition:right .3s;border-radius:2px;
}
.nav__link:hover,.nav__link.is-active{color:var(--blue)}
.nav__link:hover::after,.nav__link.is-active::after{right:0}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.3s}
.nav__toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle.is-open span:nth-child(2){opacity:0}
.nav__toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------------- Hero ---------------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;background:var(--navy)}
.hero__bg{
  position:absolute;inset:0;
  background:url("../img/hero-bg.jpg") center/cover no-repeat;
  animation:heroZoom 22s ease-in-out infinite alternate;
}
@keyframes heroZoom{from{transform:scale(1)}to{transform:scale(1.09)}}
.hero__mask{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,27,58,.94) 0%,rgba(11,27,58,.82) 42%,rgba(11,27,58,.55) 72%,rgba(11,27,58,.35) 100%);
}
.hero__inner{position:relative;z-index:2;padding-top:var(--navh)}
.hero__content{max-width:760px;padding:60px 0}
.badge{
  display:inline-block;padding:7px 18px;border-radius:999px;font-size:13px;letter-spacing:1px;
  color:var(--orange-2);border:1px solid rgba(255,160,77,.4);background:rgba(255,122,24,.10);margin-bottom:26px;
}
.hero__title{font-size:clamp(38px,6.2vw,68px);line-height:1.16;font-weight:800;color:#fff;letter-spacing:1px;margin-bottom:26px}
.hero__title .grad{font-weight:800}
.hero__desc{font-size:clamp(15px,1.55vw,17.5px);color:rgba(255,255,255,.78);line-height:1.95;max-width:640px;margin-bottom:38px}
.hero__btns{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:60px}
.hero__stats{display:flex;gap:0;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.14);padding-top:30px}
.hero__stats li{padding-right:52px;margin-right:52px;border-right:1px solid rgba(255,255,255,.12)}
.hero__stats li:last-child{border-right:none;margin-right:0;padding-right:0}
.hero__stats .num{
  display:block;font-size:38px;font-weight:800;line-height:1.2;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero__stats small{font-size:13px;color:rgba(255,255,255,.6);letter-spacing:.5px}
.hero__scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);width:26px;height:42px;border:2px solid rgba(255,255,255,.35);border-radius:14px;z-index:3}
.hero__scroll span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;background:var(--orange);border-radius:2px;animation:scrollDot 1.8s infinite}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(16px)}}

/* ---------------- 区块通用 ---------------- */
.section{padding:110px 0;position:relative}
.section--soft{background:var(--soft)}
.section--dark{background:var(--navy);color:#fff}
.sect__head{max-width:720px;margin:0 auto 62px;text-align:center}
.sect__eyebrow{
  display:inline-block;font-size:12px;letter-spacing:3px;font-weight:700;color:var(--orange);
  margin-bottom:14px;
}
.sect__eyebrow--light{color:var(--orange-2)}
.sect__title{font-size:clamp(28px,3.4vw,42px);font-weight:800;line-height:1.3;color:var(--navy);letter-spacing:.5px}
.sect__title--light{color:#fff}
.sect__sub{margin-top:16px;font-size:16px;color:var(--ink-2);line-height:1.9}
.sect__sub--light{color:rgba(255,255,255,.72)}

/* ---------------- 关于我们 ---------------- */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
.about__text p{color:var(--ink-2);font-size:16px;margin-bottom:18px}
.about__text strong{color:var(--navy);font-weight:700}
.checklist{margin-top:26px;display:grid;gap:13px}
.checklist li{position:relative;padding-left:30px;color:var(--ink-2);font-size:15.5px}
.checklist li::before{
  content:"";position:absolute;left:0;top:9px;width:18px;height:18px;border-radius:50%;
  background:var(--grad);
}
.checklist li::after{content:"";position:absolute;left:6px;top:14px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(42deg)}
.about__pic{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.about__pic img{width:100%;height:520px;object-fit:cover;transition:transform .8s}
.about__pic:hover img{transform:scale(1.04)}
.about__tag{
  position:absolute;left:0;bottom:0;background:var(--grad);color:#fff;padding:20px 32px;border-top-right-radius:var(--radius);
}
.about__tag strong{display:block;font-size:19px;font-weight:700}
.about__tag span{font-size:11.5px;letter-spacing:1.2px;opacity:.85}

/* ---------------- 主营业务 ---------------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px 34px 36px;
  transition:.35s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .4s;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.card:hover::before{transform:scaleX(1)}
.card__icon{width:58px;height:58px;border-radius:16px;background:rgba(22,104,227,.08);color:var(--blue);display:grid;place-items:center;margin-bottom:24px;transition:.35s}
.card__icon svg{width:28px;height:28px}
.card:hover .card__icon{background:var(--grad);color:#fff}
.card h3{font-size:21px;font-weight:700;color:var(--navy);margin-bottom:14px}
.card>p{font-size:15px;color:var(--ink-2);margin-bottom:20px;line-height:1.85}
.card__list{display:grid;gap:10px;border-top:1px dashed var(--line);padding-top:18px}
.card__list li{position:relative;padding-left:18px;font-size:14px;color:var(--ink-3)}
.card__list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--orange)}

/* ---------------- 元闪通品牌 ---------------- */
.brand{position:relative;overflow:hidden}
.brand__glow{
  position:absolute;width:640px;height:640px;right:-180px;top:-180px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,24,.20) 0%,rgba(255,122,24,0) 68%);
}
.brand__inner{position:relative;display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:center}
.brand__logo{text-align:center}
.brand__seal{
  position:relative;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  width:280px;height:280px;border-radius:50%;
  background:linear-gradient(145deg,rgba(255,255,255,.10),rgba(255,255,255,.03));
  border:2px solid rgba(255,255,255,.16);
  box-shadow:0 0 70px rgba(46,134,255,.25), inset 0 0 60px rgba(255,122,24,.08);
}
.brand__seal::after{
  content:"";position:absolute;inset:16px;border-radius:50%;border:1px dashed rgba(255,255,255,.2);
}
.brand__cn{font-size:56px;font-weight:800;letter-spacing:6px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2}
.brand__tm{position:absolute;top:56px;right:58px;font-size:15px;color:rgba(255,255,255,.65)}
.brand__note{margin-top:26px;font-size:13.5px;color:rgba(255,255,255,.55);letter-spacing:1px}
.brand__text p{color:rgba(255,255,255,.75);font-size:16px;margin-bottom:18px;line-height:1.95}
.brand__tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.brand__tags span{
  padding:8px 20px;border-radius:999px;font-size:13.5px;color:rgba(255,255,255,.85);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.05);
}

/* ---------------- 集团生态 ---------------- */
.tree{position:relative}
.tree__row{display:flex;justify-content:center;gap:44px}
.tree__row--mid{gap:60px}
.tree__line{height:56px;width:100%;position:relative}
.tree__line::before{
  content:"";position:absolute;left:50%;width:2px;height:50%;
  background:linear-gradient(180deg,var(--blue),var(--orange));transform:translateX(-50%);opacity:.55;
}
.tree__line::after{
  content:"";position:absolute;left:calc(25% - 15px);width:calc(50% + 30px);height:50%;
  border:2px solid var(--blue);opacity:.45;border-radius:0 0 8px 8px;
}
/* 分叉：上竖线 + 倒U（横在下半） */
.tree__line--split::before{top:0}
.tree__line--split::after{top:50%;border-top-color:var(--orange);border-bottom:none;border-radius:8px 8px 0 0}
/* 汇聚：正U（横在上半） + 下竖线 */
.tree__line--merge::before{top:50%}
.tree__line--merge::after{top:-2px;border-top:none;border-bottom-color:var(--orange);border-radius:0 0 8px 8px}
.node{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;
  text-align:center;min-width:300px;max-width:360px;flex:1;transition:.35s;position:relative;
}
.node:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.node__tag{
  display:inline-block;font-size:12px;letter-spacing:1.5px;padding:4px 14px;border-radius:999px;
  margin-bottom:14px;font-weight:600;
}
.node h3{font-size:18px;font-weight:700;color:var(--navy);margin-bottom:8px;line-height:1.5}
.node p{font-size:14px;color:var(--ink-3)}
.node--root{background:var(--grad);border:none;box-shadow:0 16px 44px rgba(22,104,227,.30)}
.node--root h3,.node--root p{color:#fff}
.node--root .node__tag{background:rgba(255,255,255,.22);color:#fff}
.node--sub .node__tag{background:rgba(22,104,227,.10);color:var(--blue)}
.node--sub{border-top:3px solid var(--blue)}
.node--partner .node__tag{background:rgba(255,122,24,.12);color:var(--orange)}
.node--partner{border-top:3px solid var(--orange)}
.node--target{
  background:var(--navy);border:none;box-shadow:0 16px 44px rgba(11,27,58,.28);
}
.node--target h3{color:#fff}
.node--target p{color:rgba(255,255,255,.7)}
.node--target .node__tag{background:rgba(255,122,24,.22);color:var(--orange-2)}
.tree__note{margin-top:40px;text-align:center;font-size:13px;color:var(--ink-3)}

/* ---------------- 智慧消防 ---------------- */
.fire__inner{display:grid;grid-template-columns:.95fr 1.05fr;gap:64px;align-items:center}
.fire__pic{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.fire__pic img{width:100%;height:560px;object-fit:cover;transition:transform .8s}
.fire__pic:hover img{transform:scale(1.04)}
.fire__text p{color:var(--ink-2);font-size:16px;margin-bottom:18px}
.fire__text strong{color:var(--navy)}
.fire__grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:30px}
.fire__item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px 22px;
  transition:.3s;
}
.fire__item:hover{border-color:transparent;box-shadow:var(--shadow);transform:translateY(-4px)}
.fire__item span{font-size:13px;font-weight:800;color:var(--orange);letter-spacing:1px}
.fire__item h4{font-size:16px;font-weight:700;color:var(--navy);margin:6px 0 8px}
.fire__item p{font-size:13.5px;color:var(--ink-3);margin:0;line-height:1.75}

/* ---------------- 核心优势 ---------------- */
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.adv__item{
  padding:38px 28px;border-radius:var(--radius);border:1px solid var(--line);
  background:linear-gradient(180deg,#fff 0%,#FAFCFF 100%);transition:.35s;position:relative;
}
.adv__item:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:rgba(22,104,227,.25)}
.adv__num{
  font-size:34px;font-weight:800;line-height:1;margin-bottom:18px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  opacity:.85;
}
.adv__item h3{font-size:18px;font-weight:700;color:var(--navy);margin-bottom:12px}
.adv__item p{font-size:14.5px;color:var(--ink-2);line-height:1.85}

/* ---------------- 联系我们 ---------------- */
.contact{position:relative;overflow:hidden}
.contact__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:56px}
.contact__card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);
  padding:32px 26px;text-align:center;transition:.3s;
}
.contact__card:hover{background:rgba(255,255,255,.09);transform:translateY(-6px);border-color:rgba(255,160,77,.4)}
.contact__ico{
  width:54px;height:54px;margin:0 auto 18px;border-radius:14px;display:grid;place-items:center;
  background:var(--grad);color:#fff;
}
.contact__ico svg{width:26px;height:26px}
.contact__card h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:8px}
.contact__card p{font-size:14px;color:rgba(255,255,255,.65);line-height:1.7}
.contact__cta{
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  background:linear-gradient(120deg,rgba(46,134,255,.14),rgba(255,122,24,.14));
  border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:44px 48px;
}
.contact__cta h3{font-size:24px;font-weight:700;color:#fff;margin-bottom:8px}
.contact__cta p{font-size:15px;color:rgba(255,255,255,.7)}

/* ---------------- 表单 ---------------- */
.contact__form{margin-top:44px}
.form{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);border-radius:var(--radius);
  padding:44px 48px;backdrop-filter:blur(8px);
}
.form__head{margin-bottom:32px}
.form__head h3{font-size:26px;font-weight:700;color:#fff;margin-bottom:8px}
.form__head p{font-size:15px;color:rgba(255,255,255,.65)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.form__field{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}
.form__field>span{font-size:14px;font-weight:500;color:rgba(255,255,255,.85)}
.form__field>span i{color:var(--orange);font-style:normal}
.form__field input,.form__field textarea{
  padding:14px 18px;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.08);color:#fff;font-size:15px;outline:none;transition:.25s;
  font-family:inherit;
}
.form__field input::placeholder,.form__field textarea::placeholder{color:rgba(255,255,255,.4)}
.form__field input:focus,.form__field textarea:focus{border-color:var(--orange-2);background:rgba(255,255,255,.12)}
.form__field textarea{resize:vertical;min-height:108px}
.form__radio{display:flex;flex-wrap:wrap;gap:18px 28px}
.form__radio label{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.8);font-size:14px;cursor:pointer}
.form__radio input[type=radio]{width:18px;height:18px;accent-color:var(--orange);cursor:pointer}
.form__footer{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:8px}
.form__tip{font-size:14px;font-weight:500;min-height:20px}
.form__tip--ok{color:var(--orange-2)}
.form__tip--err{color:#ff7e7e}
.form__field input:invalid:not(:placeholder-shown){border-color:#ff7e7e}

/* ---------------- 页脚 ---------------- */
.footer{background:#081428;color:rgba(255,255,255,.6);padding:70px 0 0}
.footer__inner{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;padding-bottom:50px}
.footer__brand .logo__text strong{color:#fff;font-size:20px}
.footer__brand .logo__text em{display:block;margin-top:6px}
.footer__brand p{margin-top:18px;font-size:14px}
.footer__links{display:grid;grid-template-columns:1.4fr 1fr;gap:40px}
.footer__links h5{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer__links a,.footer__links span{display:block;font-size:13.5px;margin-bottom:10px;transition:.25s}
.footer__links a:hover{color:var(--orange-2)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.09);padding:22px 0}
.footer__bottom .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px}
.footer__bottom .icp{color:rgba(255,255,255,.42)}

/* ---------------- 动画 ---------------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.4,0,.2,1),transform .8s cubic-bezier(.4,0,.2,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ================= 响应式 ================= */
@media (max-width:1024px){
  .about,.brand__inner,.fire__inner{grid-template-columns:1fr;gap:44px}
  .cards{grid-template-columns:1fr 1fr}
  .adv{grid-template-columns:1fr 1fr}
  .contact__grid{grid-template-columns:1fr 1fr}
  .about__pic img{height:400px}
  .fire__pic img{height:380px}
  .tree__line--split::after,.tree__line--merge::after{left:calc(25% - 20px);width:calc(50% + 40px)}
}
@media (max-width:768px){
  .section{padding:76px 0}
  .nav__menu{
    position:fixed;top:var(--navh);left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:12px 24px 24px;box-shadow:var(--shadow);
    transform:translateY(-14px);opacity:0;visibility:hidden;transition:.3s;
  }
  .nav__menu.is-open{transform:none;opacity:1;visibility:visible}
  .nav__menu .nav__link{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px}
  .nav__cta{margin-top:18px;width:100%}
  .nav__toggle{display:flex}
  .hero{min-height:auto;padding:130px 0 90px}
  .hero__content{padding:0}
  .hero__stats li{padding-right:28px;margin-right:28px}
  .hero__stats .num{font-size:30px}
  .cards,.adv,.contact__grid,.fire__grid{grid-template-columns:1fr}
  .tree__row,.tree__row--mid{flex-direction:column;align-items:center;gap:0}
  .tree__line{height:32px}
  .tree__line--split::after,.tree__line--merge::after{display:none}
  .tree__line::before{left:50%;top:0;height:100%}
  .node{min-width:0;width:100%;max-width:100%}
  .brand__seal{width:220px;height:220px}
  .brand__cn{font-size:42px}
  .brand__tm{top:44px;right:46px}
  .contact__cta{padding:32px 26px;flex-direction:column;align-items:flex-start}
  .form{padding:30px 24px}
  .form__row{grid-template-columns:1fr}
  .form__footer{flex-direction:column;align-items:flex-start}
  .footer__inner,.footer__links{grid-template-columns:1fr}
  .about__tag{padding:14px 22px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}