/* =========================================================
   TYSEM 大盛 · 机器人管线包 — 设计系统
   风格：科技感 / 苹果式留白 / 莫兰迪色系（高级灰·冷白·灰蓝）
   ========================================================= */
:root{
  /* 莫兰迪色板 */
  --bg:        #EFF1EF;   /* 冷白 */
  --bg-2:      #E7EAE9;   /* 冷白·深一档 */
  --surface:   #F7F8F7;
  --card:      #FFFFFF;
  --ink:       #232B33;   /* 深岩灰（取自LOGO字） */
  --ink-2:     #3C4650;
  --muted:     #6E7982;   /* 高级灰 */
  --faint:     #98A2AA;
  --blue:      #7E93A6;   /* 灰蓝 */
  --blue-deep: #46586A;   /* 深灰蓝 */
  --blue-soft: #D8E0E5;   /* 灰蓝·浅 */
  --green:     #9AA895;   /* 灰绿（辅助） */
  --line:      #DCE0E2;
  --accent:    #F26B0F;   /* 品牌橙（取自LOGO） */
  --accent-d:  #D95B08;
  --accent-soft:#FDE8D8;
  --radius:    18px;
  --shadow:    0 20px 60px -24px rgba(35,43,51,.18);
  --shadow-sm: 0 8px 28px -12px rgba(35,43,51,.14);
  --font: "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --header-h: 72px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
::selection{background:var(--accent);color:#fff}

/* ---------- 通用版式 ---------- */
.wrap{width:min(1240px,92vw);margin:0 auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.28em;font-weight:600;
  color:var(--blue-deep);text-transform:uppercase;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--accent);border-radius:2px}
h1,h2,h3{line-height:1.25;font-weight:700;letter-spacing:-.01em}
.sec-title{font-size:clamp(28px,3.6vw,46px);margin:14px 0 12px}
.sec-desc{color:var(--muted);max-width:640px;font-size:17px}
.center{text-align:center}
.center .sec-desc{margin:0 auto}
.center .eyebrow::before{display:none}

/* ---------- 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:1px solid transparent;cursor:pointer;transition:.3s cubic-bezier(.2,.7,.3,1);
  white-space:nowrap;font-family:var(--font);
}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-d);transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(242,107,15,.5)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-line{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-line:hover{background:#fff;color:var(--ink)}
.btn-sm{padding:9px 20px;font-size:13.5px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;inset:0 0 auto;z-index:100;height:var(--header-h);
  display:flex;align-items:center;
  transition:background .35s,box-shadow .35s,backdrop-filter .35s;
}
.site-header.scrolled{
  background:rgba(247,248,247,.82);
  backdrop-filter:saturate(1.4) blur(18px);
  -webkit-backdrop-filter:saturate(1.4) blur(18px);
  box-shadow:0 1px 0 rgba(35,43,51,.08);
}
.site-header.on-dark:not(.scrolled){color:#fff;background:#1c232a}
.site-header.on-dark.scrolled{background:#f7f8f7}
.nav-bar{display:flex;align-items:center;gap:26px;width:min(1360px,94vw);margin:0 auto}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px;letter-spacing:.02em}
.brand img{width:40px;height:40px;object-fit:contain}
.brand small{display:block;font-size:10px;font-weight:500;color:var(--muted);letter-spacing:.12em}
.site-header.on-dark:not(.scrolled) .brand small{color:rgba(255,255,255,.6)}
.main-nav{display:flex;gap:4px;margin-left:auto}
.main-nav a{
  padding:9px 15px;border-radius:999px;font-size:15px;font-weight:500;
  color:inherit;opacity:.85;transition:.25s;position:relative;
}
.main-nav a:hover{opacity:1;background:rgba(126,147,166,.16)}
.main-nav a.active{opacity:1;font-weight:700}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:16px;height:3px;border-radius:3px;background:var(--accent);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-phone{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px}
.nav-phone svg{flex:none}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:currentColor;margin:5px 0;transition:.3s}
.nav-drop{position:relative}
.nav-drop-btn{display:flex;align-items:center;gap:5px;padding:9px 15px;border-radius:999px;font-size:15px;font-weight:500;color:inherit;opacity:.85;transition:.25s;position:relative;background:none;border:0;cursor:pointer;font-family:var(--font)}
.nav-drop-btn svg{width:11px;height:11px;transition:.25s;flex:none}
.nav-drop:hover .nav-drop-btn svg{transform:rotate(180deg)}
.nav-drop-btn:hover{opacity:1;background:rgba(126,147,166,.16)}
.nav-drop-btn.cur{opacity:1;font-weight:700}
.nav-drop-btn.cur::after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:16px;height:3px;border-radius:3px;background:var(--accent)}
.nav-drop-list{position:absolute;top:calc(100% + 6px);left:0;background:#fff;border-radius:14px;padding:8px;box-shadow:0 20px 50px -12px rgba(0,0,0,.25);min-width:170px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:.25s;z-index:70}
.nav-drop:hover .nav-drop-list,.nav-drop:focus-within .nav-drop-list{opacity:1;visibility:visible;transform:none}
.nav-drop-list a{display:block;padding:9px 14px;border-radius:9px;font-size:14px;font-weight:500;color:var(--ink-2);white-space:nowrap;opacity:1}
.nav-drop-list a:hover{background:var(--accent-soft);color:var(--accent)}
.nav-drop-list a.cur{color:var(--accent);font-weight:700}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:200;background:rgba(35,43,51,.98);color:#fff;
  display:flex;flex-direction:column;padding:90px 8vw 40px;gap:6px;
  transform:translateX(100%);transition:transform .4s cubic-bezier(.2,.8,.2,1);
}
.drawer.open{transform:none}
.drawer a{font-size:22px;font-weight:600;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.drawer-close{position:absolute;top:22px;right:6vw;background:none;border:0;color:#fff;font-size:30px;cursor:pointer}
.drawer .nav-phone{margin-top:26px;font-size:19px;color:var(--accent)}
.drawer-label{font-size:12.5px;letter-spacing:2px;opacity:.55;margin-top:16px;border-bottom:0!important;font-weight:600}
.drawer a.sub{font-size:17px;font-weight:500;padding:9px 0 9px 16px}

/* ---------- 首页：全屏滚动 ---------- */
.fp{scroll-snap-type:y proximity;height:100vh;overflow-y:auto;overflow-x:hidden;scroll-behavior:smooth}
.fp-section{scroll-snap-align:start;min-height:100vh;display:flex;flex-direction:column;position:relative;padding-top:var(--header-h)}
.fp-section .wrap{flex:1;display:flex;flex-direction:column;justify-content:center}

/* 首屏 Banner：全屏底图版 */
.hero{overflow:hidden}
.hero-slide{
  display:none;flex:1;position:relative;margin:0 calc(50% - 50vw);
  align-items:center;justify-content:center;
}
.hero-slide.active{display:flex}
.hero-slide .bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  animation:heroZoom 7s ease-out forwards;
}
@keyframes heroZoom{from{transform:scale(1.08)}to{transform:scale(1)}}
.hero-slide .veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(28,35,42,.62) 0%,rgba(28,35,42,.45) 45%,rgba(28,35,42,.66) 100%);
}
.hero-slide .hero-center{
  position:relative;z-index:1;text-align:center;color:#fff;
  padding:6vh 6vw 0;max-width:1080px;transform:translateY(-4vh);
}
.hero-center .tag{
  display:inline-flex;gap:8px;align-items:center;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.3);padding:8px 20px;border-radius:999px;font-size:13.5px;
  color:#fff;font-weight:600;backdrop-filter:blur(8px);
}
.hero-center .tag i{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-center h1,.hero-center .hero-title{
  font-size:clamp(30px,4.6vw,58px);margin:26px 0 20px;font-weight:800;color:#fff;
  text-shadow:0 4px 30px rgba(0,0,0,.35);
}
.hero-center h1 em,.hero-center .hero-title em{font-style:normal;color:var(--accent)}
.hero-center p{
  color:rgba(255,255,255,.88);font-size:clamp(14.5px,1.25vw,18px);
  max-width:840px;margin:0 auto;text-shadow:0 2px 14px rgba(0,0,0,.3);
}
.hero-center .hero-btns{justify-content:center;margin-top:38px}
.hero-brands{
  margin-top:34px;display:flex;flex-wrap:wrap;gap:9px;justify-content:center;
}
.hero-brands span{
  font-size:12.5px;font-weight:600;padding:6px 15px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.85);
  backdrop-filter:blur(6px);
}
.hero-dots{position:relative;z-index:2;display:flex;gap:10px;justify-content:center;padding:0 0 34px}
.hero-dots button{
  width:44px;height:5px;border-radius:5px;border:0;background:rgba(255,255,255,.35);cursor:pointer;
  transition:.3s;position:relative;overflow:hidden;
}
.hero-dots button.on{background:rgba(255,255,255,.9)}
.hero-dots button.on::after{content:"";position:absolute;inset:0;background:var(--accent);transform-origin:left;animation:dotfill 6s linear forwards}
@keyframes dotfill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:var(--muted);font-size:12px;letter-spacing:.3em;display:flex;flex-direction:column;align-items:center;gap:8px}
.scroll-hint::after{content:"";width:1px;height:34px;background:linear-gradient(var(--muted),transparent);animation:hint 1.8s infinite}
@keyframes hint{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* 数据统计带 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.stat{background:rgba(255,255,255,.55);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;backdrop-filter:blur(8px)}
.stat b{font-size:clamp(26px,2.6vw,38px);color:var(--ink);display:flex;align-items:baseline;gap:2px}
.stat b i{font-style:normal;color:var(--accent);font-size:.6em;margin-left:2px}
.stat span{color:var(--muted);font-size:13.5px}

/* 简介 */
.intro{background:var(--bg)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:5vw;align-items:center}
.intro-img{position:relative}
.intro-img img{border-radius:26px;box-shadow:var(--shadow);aspect-ratio:4/3.2;object-fit:cover}
.intro-img::before{
  content:"";position:absolute;inset:auto -18px -18px auto;width:60%;height:60%;
  border-radius:26px;background:var(--blue-soft);z-index:-1;
}
.trust-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.trust-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2)}
.trust-list svg{flex:none;margin-top:4px}

/* 产品系列卡 */
.series{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.pcard{
  background:var(--card);border-radius:var(--radius);padding:28px;border:1px solid var(--line);
  transition:.4s cubic-bezier(.2,.7,.3,1);position:relative;overflow:hidden;cursor:pointer;
  display:flex;flex-direction:column;gap:8px;
}
.pcard:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.pcard::after{
  content:"";position:absolute;inset:0 auto auto 0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--accent),transparent);transform:scaleX(0);
  transform-origin:left;transition:.4s;
}
.pcard:hover::after{transform:none}
.pcard .num{font-size:13px;color:var(--faint);font-weight:700;letter-spacing:.15em}
.pcard h3{font-size:20px}
.pcard .slogan{color:var(--accent);font-size:14px;font-weight:600}
.pcard .scene{color:var(--muted);font-size:13.5px}
.pcard .specs{
  max-height:0;overflow:hidden;transition:max-height .45s ease;
  font-size:12.5px;color:var(--muted);
}
.pcard:hover .specs{max-height:120px}
.specs dl{display:grid;grid-template-columns:auto 1fr;gap:3px 12px;border-top:1px dashed var(--line);padding-top:10px;margin-top:8px}
.specs dt{color:var(--faint)}
.specs dd{color:var(--ink-2);font-weight:500}
.pcard .go{margin-top:auto;padding-top:10px;font-size:13.5px;font-weight:600;color:var(--blue-deep);display:flex;align-items:center;gap:6px}
.pcard:hover .go{color:var(--accent)}

/* 推荐产品 */
.hot{background:var(--ink);color:#EDEFEE}
.hot .eyebrow{color:var(--blue-soft)}
.hot .sec-desc{color:#9AA6AE}
.hot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px}
.hot-card{
  background:#2C353E;border:1px solid #3A4550;border-radius:var(--radius);overflow:hidden;
  transition:.4s;display:flex;flex-direction:column;
}
.hot-card:hover{transform:translateY(-8px);border-color:var(--accent);box-shadow:0 24px 60px -20px rgba(0,0,0,.5)}
.hot-card figure{aspect-ratio:16/9.5;overflow:hidden}
.hot-card img{width:100%;height:100%;object-fit:cover;transition:.6s}
.hot-card:hover img{transform:scale(1.06)}
.hot-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.hot-card .badge{align-self:flex-start;background:var(--accent);color:#fff;font-size:11.5px;font-weight:700;padding:4px 12px;border-radius:999px;letter-spacing:.1em}
.hot-card h3{font-size:18px}
.hot-card p{color:#9AA6AE;font-size:13.5px;flex:1}
.hot-card .meta{display:flex;justify-content:space-between;align-items:center;margin-top:6px}
.hot-card .meta span{font-size:12.5px;color:#7E93A6}
/* 桌面端四宫格：卡片变窄，标题与元信息做紧凑处理 */
@media (min-width:1081px){
  .hot-card .body{padding:18px 20px 20px;gap:8px}
  .hot-card h3{font-size:16px;line-height:1.4}
  .hot-card p{font-size:13px;line-height:1.6}
  .hot-card .meta{flex-direction:column;align-items:stretch;gap:10px;margin-top:10px}
  .hot-card .meta span{text-align:center}
}

/* 解决方案 */
.sols{background:var(--bg)}
.sol-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:40px}
.sol-card{
  border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:3/4.4;
  display:flex;align-items:flex-end;color:#fff;cursor:pointer;
}
.sol-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.6s}
.sol-card:hover img{transform:scale(1.08)}
.sol-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(35,43,51,.85))}
.sol-card .body{position:relative;z-index:1;padding:20px}
.sol-card h3{font-size:17px}
.sol-card p{font-size:12.5px;opacity:.75;margin-top:4px}
.sol-card .idx{position:absolute;top:16px;left:20px;z-index:1;font-size:13px;font-weight:700;opacity:.8;letter-spacing:.1em}

/* 案例 */
.cases{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.case-card{background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.4s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case-card figure{aspect-ratio:16/10;overflow:hidden}
.case-card img{width:100%;height:100%;object-fit:cover;transition:.6s}
.case-card:hover img{transform:scale(1.05)}
.case-card .body{padding:20px 22px}
.case-card h3{font-size:16.5px}
.case-card ul{margin-top:10px;display:grid;gap:5px}
.case-card li{font-size:12.5px;color:var(--muted);display:flex;gap:8px}
.case-card li b{color:var(--ink-2);font-weight:600;min-width:64px}

/* 合作伙伴 */
.partners{background:var(--bg-2)}
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:36px}
.logo-wall div{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  aspect-ratio:16/7;display:flex;align-items:center;justify-content:center;
  font-weight:700;color:var(--blue-deep);font-size:15px;letter-spacing:.04em;
  transition:.3s;
}
.logo-wall div:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-3px)}

/* 新闻 */
.news-sec{background:var(--bg)}
.news-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:22px;margin-top:40px}
.news-card{background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.4s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.news-card figure{aspect-ratio:16/9;overflow:hidden;background:var(--blue-soft)}
.news-card img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.news-card time{font-size:12px;color:var(--faint)}
.news-card h3{font-size:16px;line-height:1.5}
.news-card p{font-size:13px;color:var(--muted);flex:1}
.news-card .cat{font-size:11.5px;color:var(--accent);font-weight:700;letter-spacing:.08em}

/* 底部 CTA */
.cta-band{
  background:linear-gradient(120deg,var(--blue-deep),var(--ink));color:#fff;text-align:center;
}
.cta-band h2{font-size:clamp(26px,3.2vw,42px);margin-bottom:14px}
.cta-band p{color:#B9C4CC;max-width:560px;margin:0 auto}
.cta-band .hero-btns{justify-content:center}
.cta-band .tel{margin-top:26px;font-size:15px;color:#B9C4CC}
.cta-band .tel b{color:#fff;font-size:22px;letter-spacing:.02em}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#8E99A2;font-size:14px}
.foot-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:30px;padding:64px 0 44px}
.foot-brand img{width:46px;margin-bottom:14px}
.foot-brand p{max-width:300px;font-size:13px;line-height:1.9}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.foot-col li{margin-bottom:9px}
.foot-col a:hover{color:var(--accent)}
.foot-col .tel-big{color:#fff;font-size:20px;font-weight:700;display:block;margin-bottom:4px}
.foot-bottom{border-top:1px solid #333D46;padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.5px;color:#5F6B75}
.foot-bottom a{color:#5F6B75}
.foot-bottom a:hover{color:var(--accent)}

/* ---------- 悬浮咨询栏 ---------- */
.float-bar{
  position:fixed;right:18px;bottom:110px;z-index:90;display:flex;flex-direction:column;gap:10px;
}
.float-bar button,.float-bar a{
  width:52px;height:52px;border-radius:16px;border:1px solid var(--line);cursor:pointer;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);color:var(--ink-2);
  display:flex;align-items:center;justify-content:center;transition:.3s;box-shadow:var(--shadow-sm);
  position:relative;
}
.float-bar button:hover,.float-bar a:hover{background:var(--accent);color:#fff;transform:translateY(-3px)}
.float-tip{
  position:absolute;right:60px;top:50%;transform:translateY(-50%) scale(.9);opacity:0;
  background:var(--ink);color:#fff;font-size:12.5px;padding:8px 14px;border-radius:10px;
  white-space:nowrap;pointer-events:none;transition:.25s;
}
.float-bar *:hover > .float-tip{opacity:1;transform:translateY(-50%) scale(1)}
.float-tip b{color:var(--accent)}

/* ---------- 内页通用 ---------- */
.page-hero{
  padding:calc(var(--header-h) + 70px) 0 60px;
  background:linear-gradient(120deg,#E9ECEC,#DCE3E6);
  position:relative;overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-8%;top:-40%;width:46%;height:180%;
  background:radial-gradient(closest-side,rgba(126,147,166,.35),transparent);pointer-events:none;
}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px;display:flex;gap:8px;flex-wrap:wrap}
.crumb a:hover{color:var(--accent)}
.crumb span::before{content:"/";margin-right:8px;color:var(--faint)}
.page-hero h1{font-size:clamp(30px,4vw,50px)}
.page-hero .sec-desc{margin-top:12px}
.page-body{padding:64px 0 90px}

/* Tab 切换 */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:34px 0 30px}
.tab-btn{
  padding:11px 24px;border-radius:999px;border:1px solid var(--line);background:var(--card);
  font-size:14.5px;font-weight:600;color:var(--ink-2);cursor:pointer;transition:.3s;font-family:var(--font);
}
.tab-btn:hover{border-color:var(--blue)}
.tab-btn.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.tab-panel{display:none}
.tab-panel.on{display:block;animation:fadeUp .5s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* 产品中心布局 */
.prod-layout{display:grid;grid-template-columns:250px 1fr;gap:34px;align-items:start}
.filter-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:sticky;top:calc(var(--header-h) + 20px)}
.filter-box h3{font-size:15px;margin-bottom:6px}
.filter-group{border-top:1px dashed var(--line);padding:14px 0}
.filter-group h4{font-size:13.5px;color:var(--muted);margin-bottom:10px;font-weight:600}
.filter-group label{display:flex;align-items:center;gap:9px;font-size:13.5px;padding:5px 0;cursor:pointer;color:var(--ink-2)}
.filter-group input{accent-color:var(--accent);width:15px;height:15px}
.filter-clear{width:100%;margin-top:10px}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:.35s;display:flex;flex-direction:column;
}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.prod-card figure{aspect-ratio:16/10;background:#E8EBEA;overflow:hidden}
.prod-card img{width:100%;height:100%;object-fit:cover;transition:.5s}
.prod-card:hover img{transform:scale(1.05)}
.prod-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:7px;flex:1}
.prod-card .series-tag{font-size:11.5px;color:var(--blue-deep);font-weight:700;letter-spacing:.08em}
.prod-card h3{font-size:16px}
.prod-card .point{font-size:13px;color:var(--muted);flex:1}
.prod-card .fit{font-size:12.5px;color:var(--ink-2);background:var(--bg);border-radius:8px;padding:7px 11px}
.prod-card .fit b{color:var(--accent)}
.prod-card .ops{display:flex;gap:10px;margin-top:10px}
.prod-card .ops .btn{flex:1;padding:9px 0;font-size:13px}
.no-result{grid-column:1/-1;text-align:center;color:var(--muted);padding:60px 0}

/* 横幅：非标定制 */
.custom-band{
  margin-top:56px;background:linear-gradient(120deg,var(--ink),var(--blue-deep));
  border-radius:24px;color:#fff;padding:46px 5vw;display:flex;align-items:center;gap:30px;flex-wrap:wrap;
}
.custom-band h2{font-size:clamp(22px,2.4vw,30px)}
.custom-band p{color:#B9C4CC;margin-top:8px}
.custom-band .ops{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.custom-band .tel{font-size:22px;font-weight:800;color:var(--accent)}

/* 服务流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:40px;counter-reset:step}
.flow li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;
  position:relative;counter-increment:step;transition:.3s;
}
.flow li:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm)}
.flow li::before{
  content:"0" counter(step);font-size:30px;font-weight:800;color:var(--blue-soft);display:block;margin-bottom:10px;
}
.flow li h3{font-size:16px}
.flow li p{font-size:12.5px;color:var(--muted);margin-top:6px}
.flow li:not(:last-child)::after{
  content:"→";position:absolute;right:-13px;top:44%;color:var(--blue);font-weight:700;z-index:2;
}

/* 服务卡片 */
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:36px}
.svc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;display:flex;gap:20px;transition:.3s}
.svc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.svc-card .ico{
  width:54px;height:54px;flex:none;border-radius:16px;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
}
.svc-card h3{font-size:18px;margin-bottom:6px}
.svc-card p{font-size:13.5px;color:var(--muted)}
.svc-card ul{margin-top:10px;display:grid;gap:5px}
.svc-card li{font-size:13px;color:var(--ink-2);display:flex;gap:8px;align-items:center}
.svc-card li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent)}

/* 承诺 */
.promise{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px}
.promise li{background:linear-gradient(160deg,var(--card),var(--bg));border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center}
.promise b{display:block;font-size:17px;margin-top:12px}
.promise span{font-size:12.5px;color:var(--muted)}
.promise .ico{width:52px;height:52px;margin:0 auto;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center}

/* 时间轴 */
.timeline{position:relative;margin-top:44px;padding-left:30px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--blue-soft)}
.timeline li{position:relative;padding:0 0 34px 24px}
.timeline li::before{content:"";position:absolute;left:-29px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}
.timeline time{font-weight:800;color:var(--blue-deep);font-size:17px}
.timeline h3{font-size:16px;margin:4px 0}
.timeline p{font-size:13.5px;color:var(--muted)}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:36px}
.honor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px}
.honor-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center;transition:.3s;cursor:pointer}
.honor-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.honor-card .ico{width:48px;height:48px;margin:0 auto 12px;border-radius:14px;background:var(--blue-soft);color:var(--blue-deep);display:flex;align-items:center;justify-content:center}
.honor-card b{font-size:14.5px;display:block}
.honor-card span{font-size:12px;color:var(--muted)}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:34px;align-items:start}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.info-card dl{display:grid;gap:18px;margin-top:20px}
.info-card dt{font-size:12.5px;color:var(--faint);display:flex;align-items:center;gap:8px}
.info-card dd{font-size:17px;font-weight:700;color:var(--ink)}
.info-card dd a:hover{color:var(--accent)}
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:7px}
.field label i{color:var(--accent);font-style:normal}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 15px;font-size:14px;
  font-family:var(--font);background:var(--bg);transition:.25s;color:var(--ink);
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 4px rgba(242,107,15,.12)}
.field textarea{min-height:110px;resize:vertical}
.form-ok{
  display:none;margin-top:14px;background:#EDF5EE;border:1px solid #BFD8C4;color:#3E7B4F;
  border-radius:12px;padding:13px 16px;font-size:14px;
}
.form-ok.show{display:block;animation:fadeUp .4s}

/* FAQ */
.faq{margin-top:14px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden}
.faq summary{
  padding:19px 24px;font-weight:600;font-size:15px;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:14px;transition:.25s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--accent);font-weight:400;transition:.3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details[open] summary{color:var(--accent)}
.faq .a{padding:0 24px 20px;color:var(--muted);font-size:14px}
.faq-cat{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 6px}

/* 新闻页 */
.news-layout{display:grid;grid-template-columns:1fr 300px;gap:34px;align-items:start}
.news-list{display:grid;gap:18px}
.news-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:240px minmax(0,1fr);align-items:stretch;transition:.3s;cursor:pointer}
.news-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-item figure{aspect-ratio:auto;background:var(--blue-soft);width:100%;height:100%;min-width:0;min-height:160px;overflow:hidden}
.news-item img{width:100%;height:100%;object-fit:cover;display:block}
.news-item .body{padding:20px 24px;display:flex;flex-direction:column;gap:7px;min-width:0;overflow:hidden}
.news-item h3{font-size:16.5px;overflow-wrap:anywhere;word-break:break-word}
.news-item p{font-size:13px;color:var(--muted);overflow-wrap:anywhere}
.news-item time{font-size:12px;color:var(--faint)}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.side-box h3{font-size:15px;margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid var(--ink);display:inline-block}
.side-box ol{display:grid;gap:12px;counter-reset:rank}
.side-box ol li{display:flex;gap:12px;font-size:13.5px;cursor:pointer}
.side-box ol li::before{
  content:counter(rank);counter-increment:rank;flex:none;width:22px;height:22px;border-radius:7px;
  background:var(--bg-2);color:var(--muted);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.side-box ol li:nth-child(-n+3)::before{background:var(--accent);color:#fff}
.side-box ol li:hover{color:var(--accent)}
.side-cta{background:linear-gradient(150deg,var(--ink),var(--blue-deep));color:#fff;border:0}
.side-cta h3{border-color:var(--accent)}
.side-cta p{font-size:12.5px;color:#B9C4CC;margin:10px 0 16px}

/* 解决方案页 */
.part-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.part-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:.3s}
.part-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.part-card .ico{width:46px;height:46px;border-radius:14px;background:var(--blue-soft);color:var(--blue-deep);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.part-card h3{font-size:16px}
.part-card p{font-size:12.5px;color:var(--muted);margin-top:6px}
.brand-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.brand-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;transition:.3s;cursor:pointer}
.brand-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:var(--accent)}
.brand-card b{font-size:17px;display:block}
.brand-card span{font-size:12px;color:var(--muted)}
.case-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}

/* 解决方案：场景/品牌选择器 + 详情卡 */
.sol-picker{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:30px}
.sol-pick{
  background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  cursor:pointer;transition:.3s;padding:0;text-align:left;font-family:var(--font);
}
.sol-pick figure{aspect-ratio:16/11;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
.sol-pick img{width:100%;height:100%;object-fit:cover;transition:.5s}
.sol-pick:hover img{transform:scale(1.07)}
.sol-pick span{display:block;padding:11px 8px;text-align:center;font-size:13.5px;font-weight:600;color:var(--ink-2)}
.sol-pick:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.sol-pick.on{border-color:var(--accent);box-shadow:0 0 0 3px rgba(242,107,15,.18)}
.sol-pick.on span{color:var(--accent)}
.sol-detail{
  margin-top:30px;background:var(--card);border:1px solid var(--line);border-radius:24px;
  overflow:hidden;display:grid;grid-template-columns:1fr 1.1fr;animation:fadeUp .45s ease;
}
.sol-detail .photo{background:#fff;display:flex;align-items:center;justify-content:center;padding:30px;border-right:1px solid var(--line)}
.sol-detail .photo img{max-height:420px;object-fit:contain;border-radius:10px}
.sol-detail .spec{padding:38px 40px}
.sol-detail h3{font-size:24px;margin-bottom:4px}
.sol-detail .brandline{color:var(--accent);font-weight:700;font-size:14px;margin-bottom:20px}
.sol-detail dl{display:grid;grid-template-columns:88px 1fr;gap:11px 16px;font-size:14px}
.sol-detail dt{color:var(--faint);font-weight:600}
.sol-detail dd{color:var(--ink-2);line-height:1.7}
.sol-detail .ops{display:flex;gap:14px;margin-top:26px;align-items:center;flex-wrap:wrap}
.sol-detail .tel{font-size:20px;font-weight:800;color:var(--ink)}
.sol-detail .tel b{color:var(--accent)}
/* 部件说明面板 */
.part-detail{
  margin-top:26px;background:linear-gradient(120deg,var(--ink),var(--blue-deep));color:#fff;
  border-radius:22px;padding:36px 42px;display:none;animation:fadeUp .4s ease;
}
.part-detail.show{display:block}
.part-detail h3{font-size:21px;display:flex;align-items:center;gap:12px}
.part-detail h3::before{content:"";width:8px;height:26px;border-radius:4px;background:var(--accent)}
.part-detail p{color:#C3CDD4;margin-top:12px;font-size:14.5px;max-width:820px}
.part-detail .fields{display:flex;gap:26px;margin-top:18px;flex-wrap:wrap}
.part-detail .fields div{font-size:13px;color:#9FB0BA}
.part-detail .fields b{display:block;color:#fff;font-size:14.5px;margin-top:3px}
.part-card{cursor:pointer}
.part-card:hover .go{color:var(--accent)}

/* 产品系列：底图卡片（3D渲染图） */
.scard{
  position:relative;border-radius:var(--radius);overflow:hidden;cursor:pointer;
  aspect-ratio:4/3.4;border:1px solid var(--line);background:#fff;
  transition:.4s cubic-bezier(.2,.7,.3,1);display:flex;align-items:flex-end;
}
.scard:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.scard .bgimg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.6s;
}
.scard:hover .bgimg{transform:scale(1.06)}
.scard .overlay{
  position:relative;z-index:1;width:100%;padding:20px 22px 18px;color:#fff;
  background:linear-gradient(180deg,transparent,rgba(28,35,42,.88) 55%);
}
.scard .num{font-size:11px;letter-spacing:.18em;font-weight:700;opacity:.75}
.scard h3{font-size:18px;margin:4px 0 2px}
.scard .slogan{color:#FFB27A;font-size:13px;font-weight:600}
.scard .scene{font-size:12px;opacity:.8;margin-top:3px}
.scard .specs-pop{
  position:absolute;inset:0;z-index:2;background:rgba(28,35,42,.92);color:#fff;
  padding:26px 26px;display:flex;flex-direction:column;justify-content:center;
  opacity:0;transform:translateY(14px);transition:.35s;backdrop-filter:blur(4px);
}
.scard:hover .specs-pop{opacity:1;transform:none}
.specs-pop h4{font-size:16px;margin-bottom:14px;color:#fff}
.specs-pop h4::after{content:"";display:block;width:32px;height:3px;border-radius:3px;background:var(--accent);margin-top:8px}
.specs-pop dl{display:grid;grid-template-columns:auto 1fr;gap:7px 14px;font-size:12.5px}
.specs-pop dt{color:#93A3AF}
.specs-pop dd{color:#fff;font-weight:500}
.specs-pop .go{margin-top:16px;font-size:13px;font-weight:600;color:var(--accent)}

/* 解决方案：二级方案网格 */
.sub-label{display:flex;align-items:baseline;gap:12px;margin:36px 0 16px}
.sub-label h3{font-size:18px}
.sub-label span{font-size:13px;color:var(--muted)}
.sub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;animation:fadeUp .4s ease}
.sub-card{
  background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  cursor:pointer;transition:.3s;text-align:left;padding:0;font-family:var(--font);
  display:flex;align-items:center;gap:14px;
}
.sub-card figure{width:118px;height:96px;flex:none;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
.sub-card img{width:100%;height:100%;object-fit:cover}
.sub-card span{font-size:13px;font-weight:600;color:var(--ink-2);padding-right:10px;line-height:1.5}
.sub-card:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.sub-card.on{border-color:var(--accent);box-shadow:0 0 0 3px rgba(242,107,15,.18)}
.sub-card.on span{color:var(--accent)}

/* STP 方案列表 */
.stp-box{margin-top:22px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 24px}
.stp-box h4{font-size:15px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.stp-box h4::before{content:"";width:6px;height:18px;border-radius:3px;background:var(--accent)}
.stp-list{display:flex;flex-wrap:wrap;gap:9px}
.stp-list button{
  font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:var(--bg);color:var(--ink-2);transition:.25s;font-family:var(--font);
}
.stp-list button:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}

/* 电话留资弹窗 */
.modal-mask{
  position:fixed;inset:0;z-index:300;background:rgba(28,35,42,.55);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.modal-mask.show{display:flex;animation:fadeUp .25s ease}
.modal{
  background:#fff;border-radius:22px;padding:36px 34px;width:min(430px,94vw);position:relative;
  box-shadow:0 30px 80px -20px rgba(0,0,0,.35);
}
.modal h3{font-size:20px;margin-bottom:6px}
.modal p{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.modal .field input{background:var(--bg)}
.modal .btn{width:100%;margin-top:6px}
.modal-close{
  position:absolute;top:14px;right:16px;background:none;border:0;font-size:24px;color:var(--faint);cursor:pointer;
}
.modal-close:hover{color:var(--ink)}
.modal .form-ok{margin-top:14px}
.modal .modal-sub b{color:var(--ink)}
.modal .dl-phone{
  width:100%;padding:13px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg);
  font-size:15px;font-family:var(--font);color:var(--ink);outline:none;transition:.25s;
}
.modal .dl-phone:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(242,107,15,.15)}
.modal .dl-err{display:none;font-size:12.5px;color:#D23B3B;margin:8px 0 0}
.modal .dl-err.show{display:block}
.modal .dl-form .btn{margin-top:16px}
.modal .dl-ok{display:none;text-align:center;padding:10px 0 4px}
.modal .dl-ok.show{display:block;animation:fadeUp .3s ease}
.modal .dl-ok h4{font-size:18px;margin:12px 0 6px}
.modal .dl-ok p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}
.modal .dl-ok b{color:var(--accent)}

/* 技术服务：带底图的卡片 */
.svc-card.hasbg{position:relative;overflow:hidden;border:0;color:#fff;background:var(--ink)}
.svc-card.hasbg .bgimg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.9}
.svc-card.hasbg .veil{position:absolute;inset:0;background:linear-gradient(120deg,rgba(28,35,42,.93) 20%,rgba(28,35,42,.55) 65%,rgba(28,35,42,.25))}
.svc-card.hasbg > *:not(.bgimg):not(.veil){position:relative;z-index:1}
.svc-card.hasbg h3{color:#fff}
.svc-card.hasbg p{color:#C3CDD4}
.svc-card.hasbg li{color:#E4E9EC}
.svc-card.hasbg .ico{background:rgba(242,107,15,.2);color:#FFB27A}
.svc-card.hasbg .btn-dark{background:#fff;color:var(--ink)}
.svc-card.hasbg .btn-dark:hover{background:var(--accent);color:#fff}


/* ===== 第四版：浮动条 AI 客服 + 自媒体二维码 ===== */
.float-bar .ai-chat-btn{
  width:52px;height:52px;border-radius:16px;border:0;cursor:pointer;
  background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px -8px rgba(242,107,15,.55);transition:.3s;position:relative;
}
.float-bar .ai-chat-btn:hover{transform:translateY(-3px)}
.float-bar .social-btn{position:relative}
.float-bar .social-btn .float-tip b{color:var(--accent)}
.social-pop{
  position:absolute;right:64px;bottom:0;width:250px;background:#fff;border-radius:18px;
  box-shadow:0 24px 60px -16px rgba(0,0,0,.28);padding:18px 18px 14px;
  opacity:0;visibility:hidden;transform:translateX(8px);transition:.28s;z-index:20;
}
.social-btn:hover .social-pop,.social-btn:focus-within .social-pop{opacity:1;visibility:visible;transform:none}
.social-pop h5{font-size:13.5px;color:var(--ink);margin-bottom:12px;text-align:center}
.social-pop .qrs{display:flex;gap:10px;justify-content:space-between}
.social-pop .qr{text-align:center}
.social-pop .qr span{font-size:11.5px;color:var(--muted);margin-top:6px;display:block}
.qr-box{
  width:66px;height:66px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--bg);
}
.qr-box svg{width:34px;height:34px}
.qr-wx{color:#07C160}.qr-dy{color:#1A1A1A}.qr-mp{color:var(--blue-deep)}

/* AI 客服对话框 */
.ai-mask{
  position:fixed;inset:0;z-index:320;background:rgba(28,35,42,.45);backdrop-filter:blur(3px);
  display:none;align-items:flex-end;justify-content:flex-end;padding:0 24px 24px;
}
.ai-mask.show{display:flex}
.ai-panel{
  width:min(400px,94vw);height:min(560px,80vh);background:#fff;border-radius:22px;overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 30px 80px -20px rgba(0,0,0,.4);animation:fadeUp .3s ease;
}
.ai-head{background:linear-gradient(120deg,var(--ink),var(--blue-deep));color:#fff;padding:16px 18px;display:flex;align-items:center;gap:12px}
.ai-head .avatar{width:40px;height:40px;border-radius:12px;background:var(--accent);display:flex;align-items:center;justify-content:center;flex:none}
.ai-head b{font-size:15px}
.ai-head small{display:block;font-size:11.5px;opacity:.75;margin-top:2px}
.ai-head .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#4ADE80;margin-right:5px}
.ai-head .close{margin-left:auto;background:rgba(255,255,255,.14);border:0;color:#fff;width:30px;height:30px;border-radius:9px;font-size:17px;cursor:pointer}
.ai-body{flex:1;overflow-y:auto;padding:16px;background:var(--bg)}
.ai-msg{display:flex;gap:9px;margin-bottom:14px}
.ai-msg .ic{width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;flex:none;font-size:13px;font-weight:700}
.ai-msg .bubble{background:#fff;border:1px solid var(--line);border-radius:4px 14px 14px 14px;padding:10px 13px;font-size:13.5px;line-height:1.65;color:var(--ink-2);max-width:82%}
.ai-msg.user{flex-direction:row-reverse}
.ai-msg.user .bubble{background:var(--ink);color:#fff;border:0;border-radius:14px 4px 14px 14px}
.ai-quick{display:flex;flex-wrap:wrap;gap:7px;padding:0 16px 10px;background:var(--bg)}
.ai-quick button{font-size:12px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--blue-deep);cursor:pointer;transition:.25s;font-family:var(--font)}
.ai-quick button:hover{border-color:var(--accent);color:var(--accent)}
.ai-input{display:flex;gap:9px;padding:12px 14px;border-top:1px solid var(--line);background:#fff}
.ai-input input{flex:1;border:1px solid var(--line);border-radius:12px;padding:10px 13px;font-size:13.5px;font-family:var(--font);outline:none;background:var(--bg)}
.ai-input input:focus{border-color:var(--accent)}
.ai-input button{background:var(--accent);color:#fff;border:0;border-radius:12px;padding:0 18px;font-weight:600;cursor:pointer;font-family:var(--font)}

/* ===== 第四版：语言切换 ===== */
.lang-switch{position:relative;margin-left:16px}
.lang-btn{
  display:flex;align-items:center;gap:6px;background:none;border:1px solid var(--line);
  border-radius:999px;padding:7px 13px;font-size:12.5px;font-weight:600;color:var(--ink-2);
  cursor:pointer;font-family:var(--font);transition:.25s;
}
.site-header.on-dark:not(.scrolled) .lang-btn{color:#fff;border-color:rgba(255,255,255,.3)}
.lang-btn:hover{border-color:var(--accent);color:var(--accent)}
.lang-btn svg{width:14px;height:14px}
.lang-list{
  position:absolute;top:calc(100% + 8px);right:0;background:#fff;border-radius:14px;padding:8px;
  box-shadow:0 20px 50px -12px rgba(0,0,0,.25);min-width:150px;max-height:330px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:.25s;z-index:60;
}
.lang-switch:hover .lang-list,.lang-switch:focus-within .lang-list{opacity:1;visibility:visible;transform:none}
.lang-list a,.lang-list span{display:block;width:100%;text-align:left;padding:8px 12px;border-radius:9px;font-size:13px;color:var(--ink-2);text-decoration:none;font-family:var(--font);white-space:nowrap}
.lang-list a:hover{background:var(--accent-soft);color:var(--accent)}
.lang-list .on{color:var(--accent);font-weight:700}
@media (max-width:760px){.lang-switch{display:none}}

/* 产品中心：左侧分类导航 */
.side-nav{position:sticky;top:calc(var(--header-h) + 20px)}
.side-nav .sn-item{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:15px 18px;border-radius:14px;border:1px solid var(--line);background:var(--card);
  font-size:14.5px;font-weight:600;color:var(--ink-2);cursor:pointer;margin-bottom:10px;
  transition:.3s;font-family:var(--font);text-align:left;
}
.side-nav .sn-item small{font-weight:400;color:var(--faint);font-size:12px}
.side-nav .sn-item:hover{border-color:var(--blue)}
.side-nav .sn-item.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.side-nav .sn-item.on small{color:rgba(255,255,255,.6)}
.part-detail-card{margin-top:22px}
.part-detail-card .ops .tel{font-size:17px}
@media (max-width:1080px){.prod-layout.side{grid-template-columns:1fr}.side-nav{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.side-nav .sn-item{margin-bottom:0}}

/* 动效 */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal-d1{transition-delay:.1s}.reveal-d2{transition-delay:.2s}.reveal-d3{transition-delay:.3s}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .card-grid,.hot-grid,.case-grid,.prod-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid{grid-template-columns:repeat(3,1fr)}
  .sol-card{aspect-ratio:3/3.6}
  .flow{grid-template-columns:repeat(3,1fr)}
  .flow li::after{display:none}
  .foot-main{grid-template-columns:repeat(3,1fr)}
  .logo-wall{grid-template-columns:repeat(4,1fr)}
  .sol-picker{grid-template-columns:repeat(4,1fr)}
  .sub-grid{grid-template-columns:repeat(2,1fr)}
  .sol-detail{grid-template-columns:1fr}
  .sol-detail .photo{border-right:0;border-bottom:1px solid var(--line)}
  .sol-detail .photo img{max-height:320px}
  .part-grid,.brand-grid{grid-template-columns:repeat(3,1fr)}
  .honor-grid{grid-template-columns:repeat(2,1fr)}
  .hero-slide{grid-template-columns:1fr;gap:26px}
  .hero-visual{order:-1;max-width:640px}
  .float-card.fc1{left:6px}
  .float-card.fc2{right:6px}
}
@media (max-width:760px){
  :root{--header-h:62px}
  .main-nav,.nav-cta .btn{display:none}
  .menu-toggle{display:block;margin-left:auto}
  .nav-phone span{display:none}
  .fp{height:auto;overflow:visible;scroll-snap-type:none}
  .fp-section{min-height:auto;padding-top:calc(var(--header-h) + 30px);padding-bottom:56px}
  .hero{padding-top:var(--header-h)}
  .hero-slide{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .card-grid,.hot-grid,.case-grid,.prod-grid,.svc-grid,.about-grid,.news-grid,.contact-grid,.form-row{grid-template-columns:1fr}
  .sol-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:1fr 1fr}
  .prod-layout{grid-template-columns:1fr}
  .filter-box{position:static}
  .news-layout{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr}
  .news-item figure{aspect-ratio:16/10;height:auto;min-height:0}
  .promise{grid-template-columns:repeat(2,1fr)}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .part-grid,.brand-grid{grid-template-columns:repeat(2,1fr)}
  .sol-picker{grid-template-columns:repeat(2,1fr)}
  .sub-grid{grid-template-columns:1fr}
  .sol-detail .spec{padding:26px 22px}
  .hero-center h1,.hero-center .hero-title{font-size:clamp(26px,7.5vw,34px)}
  .hero-brands{gap:6px}
  .hero-brands span{font-size:11px;padding:5px 11px}
  .foot-main{grid-template-columns:1fr 1fr;padding:44px 0 30px}
  .custom-band{padding:34px 6vw}
  .custom-band .ops{margin-left:0}
  .float-bar{right:12px;bottom:84px}
  .float-bar button,.float-bar a{width:46px;height:46px}
  .intro-grid{grid-template-columns:1fr}
  .hero-dots button{width:30px}
}
.qr-img{width:96px;height:96px;object-fit:contain;border-radius:8px;border:1px solid #eee;display:block;margin:0 auto}

/* 服务流程卡片底图 */
.flow-bg li{position:relative;background-size:cover;background-position:center;overflow:hidden}
.flow-bg li::before{content:'';position:absolute;inset:0;background:rgba(255,255,255,.88);z-index:0}
.flow-bg li>*{position:relative;z-index:1}

/* 证书墙 */
.cert-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.cert-item{margin:0;border-radius:12px;overflow:hidden;border:1px solid var(--line);cursor:zoom-in;transition:transform .25s,box-shadow .25s;background:#fff}
.cert-item:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.cert-item img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/4;display:block}
@media(max-width:1080px){.cert-wall{grid-template-columns:repeat(4,1fr)}}
@media(max-width:720px){.cert-wall{grid-template-columns:repeat(3,1fr)}}
@media(max-width:480px){.cert-wall{grid-template-columns:repeat(2,1fr)}}

/* 核心优势卡片（带底图） */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.adv-card{position:relative;border-radius:16px;overflow:hidden;min-height:220px;background-size:cover;background-position:center;display:flex;align-items:flex-end;transition:transform .25s,box-shadow .25s}
.adv-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.adv-card::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,24,28,0) 30%,rgba(20,24,28,.82) 100%)}
.adv-body{position:relative;z-index:1;padding:20px;color:#fff}
.adv-body b{display:block;font-size:17px;margin-bottom:6px}
.adv-body span{font-size:13px;line-height:1.7;color:rgba(255,255,255,.85)}
@media(max-width:1080px){.adv-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.adv-grid{grid-template-columns:1fr}}

/* 资质证书：卡片说明 */
.cert-item{position:relative}
.cert-item figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 10px 8px;font-size:12px;line-height:1.5;text-align:center;color:#fff;background:linear-gradient(180deg,rgba(15,18,22,0) 0%,rgba(15,18,22,.72) 100%);pointer-events:none}
.cert-item figcaption b{display:block;font-size:12.5px;font-weight:600}
.cert-item figcaption span{font-size:11px;opacity:.82}

/* 资质证书：PDF 下载区 */
.cert-downloads{margin-top:34px}
.cert-downloads .dl-head{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13.5px;margin-bottom:16px}
.cert-downloads .dl-head::before{content:'';width:26px;height:2px;background:var(--accent)}
.dl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.dl-card{display:flex;align-items:center;gap:9px;padding:13px 15px;border:1px solid var(--line);border-radius:12px;font-size:13.5px;color:var(--ink);text-decoration:none;transition:border-color .2s,background .2s,transform .2s}
.dl-card svg{flex:none;width:17px;height:17px;color:var(--accent)}
.dl-card:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 6%,#fff);transform:translateY(-2px)}
.dl-card small{display:block;font-size:11px;color:var(--muted);margin-top:2px}

/* 证书放大预览 lightbox */
.lb-mask{position:fixed;inset:0;background:rgba(10,12,16,.9);z-index:2000;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:opacity .25s}
.lb-mask.on{opacity:1;pointer-events:auto}
.lb-box{position:relative;max-width:92vw;max-height:92vh}
.lb-box img{max-width:92vw;max-height:92vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.55);display:block}
.lb-close{position:absolute;top:-42px;right:0;width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:transparent;color:#fff;font-size:22px;line-height:1;cursor:pointer}
.lb-close:hover{background:rgba(255,255,255,.14)}

/* ---------- 产品详情弹层（点击配件 / 组合卡片弹出） ---------- */
.modal.modal-detail{
  width:min(1020px,94vw);max-height:88vh;padding:0;overflow:hidden;
  display:flex;flex-direction:column;
}
.modal.modal-detail .modal-close{
  position:absolute;top:10px;right:12px;z-index:3;width:36px;height:36px;line-height:1;
  border-radius:50%;background:rgba(255,255,255,.94);box-shadow:0 4px 14px rgba(0,0,0,.15);
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.modal.modal-detail .modal-body{overflow:auto;-webkit-overflow-scrolling:touch}
.modal.modal-detail .sol-detail{margin:0;border:0;border-radius:22px;animation:none}
@media(max-width:820px){
  .modal.modal-detail .sol-detail{grid-template-columns:1fr}
  .modal.modal-detail .sol-detail .photo{border-right:0;border-bottom:1px solid var(--line);padding:18px}
  .modal.modal-detail .sol-detail .photo img{max-height:260px}
  .modal.modal-detail .sol-detail .spec{padding:22px 20px}
  .modal.modal-detail{border-radius:18px}
}
/* ---------- 检测视频画廊 + 点击弹层播放 ---------- */
.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:28px}
.video-card{position:relative;padding:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#0b0e13;color:#fff;cursor:pointer;text-align:left}
.video-card img{width:100%;aspect-ratio:4/5;object-fit:contain;background:#0b0e13;display:block;transition:transform .25s}
.video-card:hover img{transform:scale(1.025)}
.video-card .video-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:48px;height:48px;border-radius:50%;background:rgba(242,107,15,.94);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 28px rgba(0,0,0,.32)}
.video-card .video-play::after{content:'';display:block;border-left:13px solid #fff;border-top:8px solid transparent;border-bottom:8px solid transparent;margin-left:4px}
.video-card .video-caption{position:absolute;left:0;right:0;bottom:0;padding:32px 13px 12px;background:linear-gradient(180deg,transparent,rgba(6,8,12,.88));font-size:13.5px;font-weight:600;line-height:1.45}
.video-card .video-caption small{display:block;font-weight:400;color:rgba(255,255,255,.72);margin-top:3px}
.video-modal-mask{position:fixed;inset:0;z-index:2100;background:rgba(8,10,14,.9);display:flex;align-items:center;justify-content:center;padding:22px;opacity:0;pointer-events:none;transition:opacity .22s}
.video-modal-mask.on{opacity:1;pointer-events:auto}
.video-modal-box{position:relative;width:min(980px,94vw);background:#0b0e13;border-radius:16px;padding:12px;box-shadow:0 30px 90px rgba(0,0,0,.55)}
.video-modal-box video{display:block;width:100%;max-height:74vh;background:#000;border-radius:10px}
.video-modal-box h3{color:#fff;font-size:15px;font-weight:600;margin:10px 4px 2px}
.video-modal-close{position:absolute;top:-44px;right:0;width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.45);background:transparent;color:#fff;font-size:23px;line-height:1;cursor:pointer}
@media(max-width:760px){.video-grid{grid-template-columns:1fr}.video-card img{aspect-ratio:16/10}.video-modal-mask{padding:12px}.video-modal-box{width:96vw;padding:8px}.video-modal-close{top:-40px}}

/* ---------- 公司宣传片封面 + B站弹层 ---------- */
.intro-video-cover{position:relative;display:block;width:100%;padding:0;border:0;background:transparent;cursor:pointer;text-align:left}
.intro-video-cover img{width:100%;display:block;border-radius:26px;box-shadow:var(--shadow);aspect-ratio:4/3.2;object-fit:cover}
.intro-video-cover .intro-video-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;background:rgba(242,107,15,.94);display:flex;align-items:center;justify-content:center;box-shadow:0 16px 36px rgba(0,0,0,.28)}
.intro-video-cover .intro-video-play::after{content:'';display:block;border-left:17px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent;margin-left:5px}
.intro-video-cover .intro-video-label{position:absolute;left:16px;bottom:14px;padding:7px 12px;border-radius:999px;background:rgba(11,14,19,.76);color:#fff;font-size:13px;font-weight:600}
.promo-video-box{width:min(980px,94vw)}
.promo-video-box iframe{display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:10px;background:#000}
@media(max-width:760px){.intro-video-cover .intro-video-play{width:54px;height:54px}.intro-video-cover .intro-video-play::after{border-left-width:14px;border-top-width:8px;border-bottom-width:8px}}

/* ---------- 寿命验证现场图片条 ---------- */
.life-proof{margin-top:38px}
.life-proof-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:22px}
.life-proof-card{margin:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;box-shadow:0 12px 30px -24px rgba(20,30,40,.35)}
.life-proof-card img{display:block;width:100%;aspect-ratio:16/8;object-fit:cover}
.life-proof-card figcaption{padding:13px 15px 14px}
.life-proof-card figcaption b{display:block;font-size:14px;color:var(--ink)}
.life-proof-card figcaption span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px;line-height:1.55}
@media(max-width:720px){.life-proof-grid{grid-template-columns:1fr}}

/* 首页荣誉资质证书墙 */
.home-cert-wall{grid-template-columns:repeat(5,minmax(0,1fr));max-width:1120px;margin:28px auto 0}
.home-cert-wall .cert-item img{aspect-ratio:4/3;height:auto;object-fit:contain;background:#fff;padding:8px}.home-cert-wall .cert-item.cert-wide{grid-column:span 2}.home-cert-wall .cert-item.cert-wide img{aspect-ratio:16/7}
.home-cert-wall .cert-item figcaption{padding:18px 8px 7px}
.home-cert-wall .cert-item figcaption b{font-size:11.5px}
@media(max-width:900px){.home-cert-wall{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.home-cert-wall .cert-item.cert-wide{grid-column:span 2}}