/* ==========================================================================
   昆山智勇智能科技有限公司 · 官网样式
   明亮工业风 · 浅石墨底 + 智勇红 #B01C22
   纯静态 · 无依赖 · 响应式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --red:#B01C22;         /* 品牌强调色（取自 logo） */
  --red-2:#8E1519;       /* 强调色深 */
  --red-3:#E24B52;       /* 强调色亮（暗底上的文字/描边） */
  --red-a12:rgba(176,28,34,.12);
  --red-a20:rgba(176,28,34,.20);
  --red-a45:rgba(176,28,34,.45);

  --ink:#F7F8FA;         /* 浅区底（明色化） */
  --ink-2:#F1F3F6;       /* 次级浅底 */
  --ink-3:#FFFFFF;       /* 卡片/悬停白 */
  --panel:#FFFFFF;
  --line:#E4E7EC;
  --line-2:#CFD4DC;

  --txt:#2A2F38;         /* 浅底正文 */
  --txt-dim:#5E6672;     /* 浅底次要 */
  --txt-faint:#8C939C;

  --lt:#F5F6F8;          /* 浅区底 */
  --lt-2:#EDEFF2;
  --wt:#FFFFFF;
  --txt-d:#22262C;       /* 亮底正文 */
  --txt-d-dim:#5A6169;
  --line-d:#DFE3E8;

  --r:14px;
  --r-s:9px;
  --r-l:20px;
  --wrap:1280px;
  --pad:24px;
  --ease:cubic-bezier(.4,0,.2,1);
  --shadow:0 18px 40px -22px rgba(20,26,38,.16);
  --shadow-l:0 16px 40px -20px rgba(20,26,38,.22);
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-num:"Barlow Condensed","DIN Alternate","Oswald",var(--font);
  --nav-h:76px;
}

/* ---------- 2. 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{zoom:.9;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{
  margin:0;background:#EDEDEF;color:var(--txt);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--red);color:#fff}
:focus-visible{outline:2px solid var(--red-3);outline-offset:3px;border-radius:4px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;z-index:999;background:var(--red);color:#fff;padding:12px 20px;border-radius:0 0 var(--r-s) 0}
.skip:focus{left:0}

/* ---------- 3. 布局 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
.sec{padding:96px 0;position:relative}
.sec--tight{padding:64px 0}
.sec--dark{background:rgba(255,255,255,.60);color:var(--txt)}
.sec--dark2{background:rgba(255,255,255,.78);color:var(--txt)}
.sec--light{background:#F7F8F9;color:var(--txt-d)}
.sec--white{background:#FFFFFF;color:var(--txt-d)}
.sec--grid::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent 78%);
          mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent 78%);
}
.sec>.wrap{position:relative;z-index:1}
.sec--light.sec--grid::before,.sec--white.sec--grid::before{
  background-image:linear-gradient(var(--line-d) 1px,transparent 1px),linear-gradient(90deg,var(--line-d) 1px,transparent 1px)
}

/* 区块标题 */
.head{max-width:760px;margin-bottom:52px}
.head--c{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 16px;
  font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--red);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);flex:none}
.head--c .eyebrow::before{display:none}
.head h2{font-size:clamp(26px,3.1vw,40px);margin-bottom:16px}
.head p{color:var(--txt-dim);font-size:16.5px}
.sec--light .head p,.sec--white .head p{color:var(--txt-d-dim)}
.head h2 em{font-style:normal;color:var(--red)}
.sec--light .head h2 em,.sec--white .head h2 em{color:var(--red)}

/* ---------- 4. 顶部信息条 ---------- */
.topbar{background:var(--ink);border-bottom:1px solid var(--line);font-size:13px;color:var(--txt-dim)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:44px;flex-wrap:wrap}
.topbar__points{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.topbar__points li{display:flex;align-items:center;gap:7px;white-space:nowrap}
.topbar__points svg{width:14px;height:14px;color:var(--red);flex:none}
.topbar__right{display:flex;align-items:center;gap:18px}
.topbar__tel{display:flex;align-items:center;gap:7px;color:var(--red);font-size:17px;font-weight:800;letter-spacing:.02em;white-space:nowrap;flex:none}
.topbar__tel svg{width:14px;height:14px;color:var(--red)}
.topbar__tel:hover{color:var(--red-2)}
.lang{display:flex;gap:2px;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.lang a{padding:3px 10px;font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--txt-dim)}
.lang a.on{background:var(--red);color:#fff}
.lang a:hover{color:#fff;background:var(--red-2)}

/* ---------- 5. 导航 ---------- */
.nav{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .3s var(--ease)}
.nav.is-stuck{box-shadow:0 10px 26px -18px rgba(20,26,38,.28);background:rgba(255,255,255,.97)}
.nav .wrap{display:flex;align-items:center;gap:28px;min-height:var(--nav-h);transition:min-height .3s var(--ease)}
.nav.is-stuck .wrap{min-height:64px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand__mark{width:42px;height:42px;border-radius:10px;background:var(--red);display:grid;place-items:center;font-family:var(--font-num);font-weight:800;font-size:21px;color:#fff;letter-spacing:-.02em;flex:none;box-shadow:0 6px 18px -8px var(--red)}
.brand__mark-img{height:42px;width:auto;flex:none;filter:drop-shadow(0 4px 14px rgba(176,28,34,.45))}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__cn{font-size:16.5px;font-weight:800;color:var(--txt-d);letter-spacing:.01em}
.brand__en{font-size:10.5px;font-weight:600;color:var(--txt-faint);letter-spacing:.09em;text-transform:uppercase}
.menu{margin-left:auto}
.menu ul{display:flex;align-items:center;gap:4px}
.menu a{display:block;padding:9px 14px;border-radius:var(--r-s);font-size:15px;font-weight:600;color:var(--txt);position:relative;transition:color .2s,background .2s}
.menu a::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease)}
.menu a:hover{color:var(--red)}
.menu a:hover::after{transform:scaleX(1)}
.menu a.on{color:var(--red)}
.menu a.on::after{transform:scaleX(1)}
.nav__cta{flex:none}
.nav__burger{display:none;width:44px;height:44px;border:1px solid var(--red);background:rgba(176,28,34,.06);border-radius:var(--r-s);cursor:pointer;padding:0;place-items:center;transition:background .25s,border-color .25s}
.nav__burger span{display:block;width:20px;height:2px;background:var(--txt);margin:4px auto;transition:transform .3s var(--ease),opacity .2s}
.nav__burger.on span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav__burger.on span:nth-child(2){opacity:0}
.nav__burger.on span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@keyframes burgerPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(176,28,34,.5);border-color:var(--red)}
  55%{box-shadow:0 0 0 10px rgba(176,28,34,0);border-color:var(--red-a45)}
}
.nav__burger{animation:burgerPulse 2.2s var(--ease) infinite}
.nav__burger:hover{background:var(--red)}
.nav__burger:hover span{background:#fff}
.nav__burger.on{animation:none;border-color:var(--line-2);background:transparent}
@media (prefers-reduced-motion:reduce){.nav__burger{animation:none}}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-s);border:1px solid transparent;
  background:var(--red);color:#fff;font-weight:700;font-size:15px;cursor:pointer;
  transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s,color .22s;
  white-space:nowrap;
}
.btn:hover{background:var(--red-2);transform:translateY(-2px);box-shadow:0 12px 26px -12px var(--red)}
.btn svg{width:16px;height:16px;flex:none}
.btn--ghost{background:transparent;border-color:var(--line-2);color:var(--txt)}
.btn--ghost:hover{background:rgba(176,28,34,.06);border-color:var(--red);color:var(--red);box-shadow:none}
.sec--light .btn--ghost,.sec--white .btn--ghost{border-color:var(--line-d);color:var(--txt-d)}
.sec--light .btn--ghost:hover,.sec--white .btn--ghost:hover{background:var(--wt);border-color:var(--red);color:var(--red)}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--block{width:100%}
.btn--light{background:#fff;color:var(--txt-d)}
.btn--light:hover{background:#fff;color:var(--red);box-shadow:0 12px 26px -14px rgba(0,0,0,.6)}

/* 主按钮：红色脉冲光圈 + 斜向高光扫过（老板要求"会闪动"） */
.btn{position:relative;overflow:hidden;isolation:isolate}
@keyframes btnPulse{
  0%,100%{box-shadow:0 12px 26px -14px rgba(176,28,34,.55),0 0 0 0 rgba(176,28,34,.55)}
  55%{box-shadow:0 12px 26px -14px rgba(176,28,34,.55),0 0 0 16px rgba(176,28,34,0)}
}
@keyframes fabPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(176,28,34,.45),0 8px 18px -10px rgba(16,24,40,.30)}
  55%{box-shadow:0 0 0 14px rgba(176,28,34,0),0 8px 18px -10px rgba(16,24,40,.30)}
}
@keyframes btnShine{
  0%{transform:translateX(-140%) skewX(-20deg)}
  52%,100%{transform:translateX(280%) skewX(-20deg)}
}
.btn:not(.btn--ghost):not(.btn--light){animation:btnPulse 2.6s var(--ease) infinite}
.btn:not(.btn--ghost):not(.btn--light)::after{
  content:"";position:absolute;top:-10%;bottom:-10%;left:0;width:38%;z-index:0;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  transform:translateX(-140%) skewX(-20deg);animation:btnShine 3.4s ease-in-out infinite;
}
.btn>span,.btn>svg{position:relative;z-index:1}
.btn:hover{animation-play-state:paused}
@media (prefers-reduced-motion:reduce){
  .btn{animation:none!important}
  .btn::after{display:none!important}
}

/* ---------- 7. Hero（整幅视频 · 左侧窄渐变 + 底边融入浅底） ---------- */

/* ---- 微信内置浏览器：视频不可自动播放，改用封面图 + 缓慢推近 ---- */
.hero__bg--still{display:none;object-fit:cover;object-position:center 46%}
.is-wechat .hero__bg:not(.hero__bg--still){display:none}
.is-wechat .hero__bg--still{display:block;filter:brightness(1.3) saturate(1) contrast(.96);animation:heroKen 28s ease-in-out infinite alternate}
@keyframes heroKen{from{transform:scale(1)}to{transform:scale(1.09)}}
@media (prefers-reduced-motion:reduce){.is-wechat .hero__bg--still{animation:none}}
.no-video .hero__bg:not(.hero__bg--still){opacity:0}

.hero{position:relative;display:block;overflow:hidden;background:#EDEDEF url("../../assets/img/hero-machining-960.webp") center 46%/cover no-repeat}

.hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 46%;z-index:0;filter:brightness(1.04) saturate(1.02) contrast(1.02)}
.hero__scrim{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(10,12,15,.74) 0%,rgba(10,12,15,.62) 24%,rgba(10,12,15,.34) 42%,rgba(10,12,15,.10) 58%,rgba(10,12,15,0) 72%),
    linear-gradient(180deg,rgba(241,242,244,.82) 0%,rgba(241,242,244,.5) 2%,rgba(241,242,244,.22) 5%,rgba(241,242,244,.06) 7%,rgba(241,242,244,0) 9%,rgba(241,242,244,0) 83%,rgba(241,242,244,.12) 87%,rgba(241,242,244,.34) 92%,rgba(241,242,244,.55) 96%,rgba(237,237,239,.75) 100%);
}
.hero__inner{position:relative;z-index:2;padding:88px 0 92px 20px;max-width:680px;min-height:min(74vh,700px);display:flex;flex-direction:column;justify-content:center;color:#fff}
.hero__inner::after{content:"";position:absolute;left:0;top:104px;bottom:104px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--red-3),rgba(226,75,82,0))}
.hero .eyebrow{color:#F0656B}
.hero__title{font-size:clamp(28px,3.4vw,48px);line-height:1.12;margin:0 0 20px;color:#fff;letter-spacing:-.02em;text-shadow:0 2px 24px rgba(0,0,0,.28)}
.hero__title b{display:block;color:#F0656B;font-weight:800}
.hero__title em{font-style:normal;display:block;color:#fff}
.hero__title em b{color:#F0656B;font-weight:800}
.hero__sub{font-size:clamp(15px,1.3vw,17px);color:rgba(255,255,255,.84);margin:0 0 24px;max-width:560px}
.ticks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 26px;margin:0 0 30px;max-width:580px}
.ticks li{display:flex;align-items:flex-start;gap:9px;font-size:15px;color:#fff}
.ticks svg{width:17px;height:17px;color:#F0656B;flex:none;margin-top:4px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.06)}
.hero .btn--ghost:hover{background:rgba(255,255,255,.16);border-color:#fff}
.hero__note{margin-top:18px;font-size:13px;color:rgba(255,255,255,.58);letter-spacing:.02em}
.hero__tags{position:absolute;z-index:2;right:max(var(--pad), calc((100vw - var(--wrap)) / 2 + var(--pad)));bottom:52px;display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.hero__tags .tag{background:rgba(255,255,255,.92);border-color:rgba(255,255,255,.7);color:var(--txt-d);backdrop-filter:blur(6px)}
.hero__tags .tag--red{background:var(--red);border-color:var(--red);color:#fff}
@media (min-width:901px){.hero__inner{margin-left:calc((100vw - var(--wrap)) / 2 - 16px)}}

@media (max-width:900px){
  .hero{min-height:0}
  .hero__bg{position:absolute;inset:0;width:100%;height:100%;aspect-ratio:auto;max-height:none;object-fit:cover;object-position:center 52%}
  .hero__scrim{display:block;position:absolute;inset:0;
    background:
      linear-gradient(180deg,rgba(255,255,255,.88) 0%,rgba(250,250,251,.5) 3%,rgba(240,241,243,.24) 8%,rgba(240,241,243,.07) 13%,rgba(240,241,243,0) 17%,rgba(240,241,243,0) 83%,rgba(240,241,243,.12) 87%,rgba(240,241,243,.34) 92%,rgba(240,241,243,.55) 96%,rgba(237,237,239,.72) 100%),
      linear-gradient(180deg,rgba(10,12,15,.72) 0%,rgba(10,12,15,.55) 22%,rgba(10,12,15,.44) 55%,rgba(10,12,15,.6) 100%)}
  .hero__inner{margin:0;padding:56px 18px 52px;background:none;border-radius:0;min-height:min(76vh,620px);max-width:none;color:#fff;box-shadow:none;justify-content:flex-end}
  .hero__inner::after{top:auto;bottom:52px;height:calc(100% - 104px)}
  .hero .eyebrow{color:#F0656B}
  .hero__title{font-size:26px;line-height:1.2;color:#fff;text-shadow:0 2px 20px rgba(0,0,0,.35)}
  .hero__title b,.hero__title em b{color:#F0656B}
  .hero__title em{color:#fff}
  .hero__sub{color:rgba(255,255,255,.85);margin-bottom:20px}
  .ticks li{color:#fff}
  .ticks svg{color:#F0656B}
  .hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.08)}
  .hero__note{color:rgba(255,255,255,.6)}
  .hero__tags{position:static;margin:0 18px 22px;align-items:flex-start;flex-direction:row;flex-wrap:wrap;gap:8px}
  .hero__tags .tag{background:rgba(255,255,255,.92);border-color:rgba(255,255,255,.7)}
}

/* ---------- 8. 标签/徽标 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border:1px solid var(--line-2);border-radius:100px;font-size:12.5px;font-weight:600;color:var(--txt);background:rgba(255,255,255,.75);letter-spacing:.02em}
.sec--light .tag,.sec--white .tag{border-color:var(--line-d);background:#fff;color:var(--txt-d-dim)}
.tag--red{border-color:var(--red-a45);background:var(--red-a12);color:var(--red)}
.sec--light .tag--red,.sec--white .tag--red{color:var(--red);background:var(--red-a12);border-color:var(--red-a20)}
.tags{display:flex;flex-wrap:wrap;gap:9px}

/* ---------- 9. 数字条 ---------- */
.stats{background:linear-gradient(180deg,rgba(255,255,255,.62) 0%,rgba(238,241,245,.85) 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats__grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.stat{background:var(--ink-3);padding:32px 26px;text-align:center;transition:background .3s}
.stat:hover{background:var(--ink-2)}
.stat b{display:inline-block;font-family:var(--font-num);font-size:clamp(38px,4.6vw,58px);font-weight:800;line-height:1;color:var(--txt-d);letter-spacing:-.02em}
.stat b i{font-style:normal;font-size:.45em;color:var(--red);margin-left:2px;font-weight:700}
.stat>i{font-style:normal;display:inline-block;font-size:clamp(20px,2.2vw,28px);color:var(--red);margin-left:5px;font-weight:700}
.stat span{display:block;margin-top:12px;font-size:13.5px;color:var(--txt-dim);letter-spacing:.02em}
.stat--accent b{color:var(--red)}

/* ---------- 10. 卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.cards--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cards--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 26px;display:flex;flex-direction:column;gap:14px;
  transition:transform .3s var(--ease),border-color .3s,box-shadow .3s,background .3s;
  overflow:hidden;
}
.card::before{content:"";position:absolute;left:0;top:0;height:2px;width:0;background:var(--red);transition:width .38s var(--ease)}
.card:hover{transform:translateY(-5px);border-color:var(--red-a45);box-shadow:var(--shadow);background:var(--ink-3)}
.card:hover::before{width:100%}
.sec--light .card,.sec--white .card{background:#fff;border-color:var(--line-d);box-shadow:var(--shadow-l)}
.sec--light .card:hover,.sec--white .card:hover{background:#fff;border-color:var(--red-a45)}
.ico{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;background:var(--red-a12);border:1px solid var(--red-a20);flex:none}
.ico svg{width:25px;height:25px;color:var(--red)}
.sec--light .ico svg,.sec--white .ico svg{color:var(--red)}
.card h3{font-size:19px;color:var(--txt-d)}
.sec--light .card h3,.sec--white .card h3{color:var(--txt-d)}
.card p{font-size:14.5px;color:var(--txt-dim);margin:0}
.sec--light .card p,.sec--white .card p{color:var(--txt-d-dim)}
.card__num{position:absolute;right:18px;top:12px;font-family:var(--font-num);font-size:52px;font-weight:800;color:rgba(20,26,38,.055);line-height:1;letter-spacing:-.03em}
.sec--light .card__num,.sec--white .card__num{color:rgba(20,26,38,.06)}
.card__more{margin-top:auto;display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:700;color:var(--red);padding-top:6px}
.sec--light .card__more,.sec--white .card__more{color:var(--red)}
.card__more svg{width:15px;height:15px;transition:transform .25s var(--ease)}
.card:hover .card__more svg{transform:translateX(4px)}

/* 图文卡（带图） */
.pcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.pcard:hover{transform:translateY(-5px);border-color:var(--red-a45);box-shadow:var(--shadow)}
.sec--light .pcard,.sec--white .pcard{background:#fff;border-color:var(--line-d);box-shadow:var(--shadow-l)}
.pcard__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--ink)}
.sec--light .pcard__media,.sec--white .pcard__media{background:var(--lt-2)}
.pcard__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.pcard:hover .pcard__media img{transform:scale(1.045)}
.pcard__badge{position:absolute;left:12px;top:12px;z-index:2;padding:5px 12px;border-radius:100px;background:var(--red);color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.04em}
.pcard__body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:13px;flex:1}
.pcard__body h3{font-size:18px;color:var(--txt-d)}
.sec--light .pcard__body h3,.sec--white .pcard__body h3{color:var(--txt-d)}
.pcard__body p{font-size:14px;color:var(--txt-dim);margin:0}
.sec--light .pcard__body p,.sec--white .pcard__body p{color:var(--txt-d-dim)}
.specs{margin:0;display:grid;gap:7px;padding-top:14px;border-top:1px dashed var(--line)}
.sec--light .specs,.sec--white .specs{border-color:var(--line-d)}
.specs>div{display:flex;gap:10px;font-size:13px;align-items:baseline}
.specs dt{color:var(--txt-faint);flex:none;min-width:74px;font-weight:600}
.sec--light .specs dt,.sec--white .specs dt{color:#98A0A8}
.specs dd{margin:0;color:var(--txt);font-weight:600}
.sec--light .specs dd,.sec--white .specs dd{color:var(--txt-d)}

/* 材料牌号表 */
.mtable{width:100%;border-collapse:collapse;font-size:12.5px;margin-top:4px}
.mtable th,.mtable td{padding:8px 9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.5}
.sec--dark .mtable th,.sec--dark .mtable td{border-color:var(--line)}
.mtable th{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--txt-faint);font-weight:700}
.mtable td:first-child{white-space:nowrap;font-weight:700}
.mtable tr:last-child td{border-bottom:none}

/* ---------- 11. 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split--rev .split__media{order:-1}
.split__media{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.sec--light .split__media,.sec--white .split__media{border-color:var(--line-d);box-shadow:var(--shadow-l)}
.split__media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split__media--wide img{aspect-ratio:16/9}
.split__badge{position:absolute;left:0;bottom:0;padding:14px 22px;background:var(--red);color:#fff;font-weight:800;font-size:14px;letter-spacing:.02em;border-radius:0 var(--r-s) 0 0}
a.split__badge--link{transition:background .22s}
a.split__badge--link:hover{background:var(--red-2)}
/* 高德瓦片地图（联系页） */
.split__media--map{aspect-ratio:4/3;background:var(--lt-2)}
.amap{position:absolute;inset:0;z-index:0}
.split__media--map .leaflet-container{background:#E9E5DC;font-family:inherit;font-size:13px}
.split__media--map .leaflet-bar a{color:var(--txt-d);border-color:var(--line-d)}
.split__media--map .leaflet-bar a:hover{color:var(--red);background:#fff}
.amap__attr{position:absolute;right:8px;bottom:2px;z-index:400;font-size:11px;line-height:1.6;color:#5A6169;background:rgba(255,255,255,.75);padding:0 6px;border-radius:4px;pointer-events:none}
.amap-pin{width:34px;height:34px}
.amap-pin i{position:absolute;left:5px;top:0;width:24px;height:24px;background:var(--red);border:3px solid #fff;border-radius:50% 50% 50% 0;transform:rotate(-45deg);box-shadow:0 8px 16px -6px rgba(0,0,0,.55)}
.amap-pin i::after{content:"";position:absolute;left:6px;top:6px;width:6px;height:6px;border-radius:50%;background:#fff}
.amap-tip{background:var(--red);color:#fff;border:0;border-radius:8px;padding:6px 11px;font-weight:700;font-size:13px;box-shadow:0 10px 22px -10px rgba(0,0,0,.6)}
.amap-tip::before{border-top-color:var(--red)}
.split__body h2{font-size:clamp(25px,2.9vw,37px);margin-bottom:18px}
.sec--light .split__body h2,.sec--white .split__body h2{color:var(--txt-d)}
.split__body p{color:var(--txt-dim);margin-bottom:16px}
.sec--light .split__body p,.sec--white .split__body p{color:var(--txt-d-dim)}
.split__body p:last-child{margin-bottom:0}

/* 特点列表（图标行） */
.flist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 26px;margin-top:26px}
.flist li{display:flex;gap:12px;align-items:flex-start}
.flist .fi{width:36px;height:36px;border-radius:9px;background:var(--red-a12);border:1px solid var(--red-a20);display:grid;place-items:center;flex:none}
.flist .fi svg{width:18px;height:18px;color:var(--red)}
.sec--light .flist .fi svg,.sec--white .flist .fi svg{color:var(--red)}
.flist b{display:block;font-size:14.5px;color:var(--txt-d);font-weight:700}
.sec--light .flist b,.sec--white .flist b{color:var(--txt-d)}
.flist span{font-size:13px;color:var(--txt-dim);line-height:1.6}
.sec--light .flist span,.sec--white .flist span{color:var(--txt-d-dim)}

/* ---------- 12. 表格 ---------- */
.tbl-wrap{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.sec--light .tbl-wrap,.sec--white .tbl-wrap{border-color:var(--line-d);box-shadow:var(--shadow-l)}
.tbl{font-size:14.5px;min-width:640px}
.tbl th,.tbl td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
.sec--light .tbl th,.sec--light .tbl td,.sec--white .tbl th,.sec--white .tbl td{border-color:var(--line-d)}
.tbl thead th{background:var(--ink-2);color:var(--txt-dim);font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}
.sec--light .tbl thead th,.sec--white .tbl thead th{background:var(--lt-2);color:var(--txt-d-dim)}
.tbl tbody tr:last-child td{border-bottom:0}
.tbl tbody tr:hover{background:rgba(176,28,34,.05)}
.tbl td:first-child{font-weight:700;color:var(--txt-d)}
.sec--light .tbl td:first-child,.sec--white .tbl td:first-child{color:var(--txt-d)}
.tbl .num{font-family:var(--font-num);font-weight:800;font-size:17px;color:var(--red)}
.sec--light .tbl .num,.sec--white .tbl .num{color:var(--red)}
.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- 13. 流程时间轴 ---------- */
.flow{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;position:relative;margin-top:20px}
.flow::before{content:"";position:absolute;left:6%;right:6%;top:29px;height:1px;background:var(--line-2);z-index:0}
.flow li{position:relative;z-index:1;text-align:center;padding:0 8px}
.flow .fd{width:58px;height:58px;margin:0 auto 14px;border-radius:50%;background:var(--ink-2);border:2px solid var(--line-2);display:grid;place-items:center;font-family:var(--font-num);font-weight:800;font-size:20px;color:var(--txt-dim);transition:border-color .3s,color .3s,transform .3s var(--ease)}
.flow li:hover .fd{border-color:var(--red);background:var(--red);color:#fff;transform:translateY(-4px)}
.flow b{display:block;font-size:14.5px;color:var(--txt-d);margin-bottom:5px}
.sec--light .flow b,.sec--white .flow b{color:var(--txt-d)}
.flow span{font-size:12.5px;color:var(--txt-dim);line-height:1.55;display:block}
.sec--light .flow span,.sec--white .flow span{color:var(--txt-d-dim)}
.sec--light .flow .fd,.sec--white .flow .fd{background:#fff;border-color:var(--line-d);color:var(--txt-d-dim)}
.sec--light .flow::before,.sec--white .flow::before{background:var(--line-d)}

/* ---------- 14. 画廊 ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.gallery--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.gallery figure{margin:0;position:relative;border-radius:var(--r-s);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--ink);min-width:0}
.sec--light .gallery figure,.sec--white .gallery figure{border-color:var(--line-d);background:var(--lt-2)}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease),filter .4s}
.gallery figure:hover img{transform:scale(1.06)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;font-size:13px;font-weight:600;color:#fff;background:linear-gradient(180deg,transparent,rgba(10,12,15,.88))}
.gallery--sp{grid-template-columns:repeat(2,minmax(0,1fr))}
.gallery--sp figure:nth-child(1){grid-row:span 2}
.gallery--sp figure:nth-child(1) img{aspect-ratio:1/1}
/* 证书类：竖版原件不裁切，白底完整显示 */
.split__media--doc img{object-fit:contain;background:#fff}
.gallery figure.doc img{object-fit:contain;background:#fff;padding:14px}
.gallery figure.doc figcaption{background:linear-gradient(180deg,transparent,rgba(10,12,15,.82))}

/* ---------- 15. 报价/行动区 ---------- */
.cta{position:relative;overflow:hidden;background:linear-gradient(120deg,#FFFFFF 0%,#F4F6F9 55%,#FBEDEF 100%);border-top:1px solid var(--line);padding:84px 0}
.cta::after{content:"";position:absolute;right:-140px;top:-140px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,var(--red-a20),transparent 68%);pointer-events:none}
.cta .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.25fr .75fr;gap:52px;align-items:center}
.cta h2{font-size:clamp(25px,3vw,38px);color:var(--txt-d);margin-bottom:14px}
.cta p{color:var(--txt-dim);margin-bottom:24px}
.cta__actions{display:flex;gap:14px;flex-wrap:wrap}
.cta__box{background:#fff;border:1px solid var(--line-d);border-radius:var(--r);padding:26px;box-shadow:var(--shadow-l)}
.cta__box ul{display:grid;gap:13px}
.cta__box li{display:flex;gap:11px;align-items:flex-start;font-size:14.5px;color:var(--txt)}
.cta__box svg{width:17px;height:17px;color:var(--red);flex:none;margin-top:4px}

/* ---------- 16. 表单 ---------- */
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:700;color:var(--txt);letter-spacing:.01em}
.field label i{color:var(--red);font-style:normal;margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line-2);border-radius:var(--r-s);
  background:var(--ink-3);color:var(--txt);transition:border-color .22s,background .22s;font-size:15px;
}
.sec--light .field input,.sec--light .field select,.sec--light .field textarea,
.sec--white .field input,.sec--white .field select,.sec--white .field textarea{background:#fff;border-color:var(--line-d);color:var(--txt-d)}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-faint)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red);background:var(--ink-3)}
.sec--light .field input:focus,.sec--light .field select:focus,.sec--light .field textarea:focus,
.sec--white .field input:focus,.sec--white .field select:focus,.sec--white .field textarea:focus{border-color:var(--red);background:#fff}
.field textarea{min-height:118px;resize:vertical;font-family:inherit}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238A9199' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:16px;padding-right:42px}
/* 下拉展开的原生列表跟随 option 配色: 深色区块深底浅字, 浅色区块白底深字, 避免黑底黑字 */
.field select option{background:var(--panel);color:var(--txt)}
.sec--light .field select option,.sec--white .field select option{background:#fff;color:var(--txt-d)}
.field .err{font-size:12.5px;color:var(--red);display:none}
.field.is-bad input,.field.is-bad select,.field.is-bad textarea{border-color:var(--red)}
.field.is-bad .err{display:block}
.upload{border:1.5px dashed var(--line-2);border-radius:var(--r-s);padding:26px 20px;text-align:center;cursor:pointer;transition:border-color .22s,background .22s;background:var(--ink-3)}
.upload:hover{border-color:var(--red);background:var(--ink-2)}
.upload svg{width:30px;height:30px;color:var(--red);margin:0 auto 10px}
.upload b{display:block;font-size:14.5px;color:var(--txt);margin-bottom:5px}
.upload span{font-size:12.5px;color:var(--txt-faint)}
.upload input{display:none}
.form__note{grid-column:1/-1;font-size:12.5px;color:var(--txt-faint);line-height:1.7}
.form__foot{grid-column:1/-1;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.form__msg{grid-column:1/-1;padding:14px 18px;border-radius:var(--r-s);font-size:14.5px;display:none;border:1px solid}
.form__msg.show{display:block}
.form__msg--ok{background:var(--red-a12);border-color:var(--red-a20);color:#F0B4B8}
.form__msg--warn{background:#fff;border-color:var(--line-d);color:var(--txt)}

/* ---------- 17. 页头（内页） ---------- */
.phead{position:relative;background:var(--ink);padding:64px 0 56px;border-bottom:1px solid var(--line);overflow:hidden}
.phead__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.3;z-index:0}
.phead::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(247,248,250,.94),rgba(247,248,250,.66))}
.phead .wrap{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--txt-dim);margin-bottom:16px;flex-wrap:wrap}
.crumb a:hover{color:var(--red)}
.crumb svg{width:13px;height:13px}
.phead h1{font-size:clamp(27px,3.6vw,44px);color:var(--txt-d);margin-bottom:14px;letter-spacing:-.02em}
.phead p{color:var(--txt-dim);max-width:720px;font-size:16px}
.phead__tags{margin-top:22px}

/* ---------- 18. 其他组件 ---------- */
.note{border-left:3px solid var(--red);background:var(--red-a12);padding:16px 20px;border-radius:0 var(--r-s) var(--r-s) 0;font-size:14.5px;color:var(--txt)}
.sec--light .note,.sec--white .note{color:var(--txt-d);background:rgba(176,28,34,.06)}
.note b{color:var(--txt-d)}
.sec--light .note b,.sec--white .note b{color:var(--red)}
.quote{border-left:3px solid var(--line-2);padding:4px 0 4px 22px;color:var(--txt-dim);font-size:15.5px;line-height:1.85}
.sec--light .quote,.sec--white .quote{color:var(--txt-d-dim);border-color:var(--line-d)}
.kv{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.sec--light .kv,.sec--white .kv{background:var(--line-d);border-color:var(--line-d)}
.kv>div{background:var(--ink-2);padding:20px 22px}
.sec--light .kv>div,.sec--white .kv>div{background:#fff}
.kv dt{font-size:12.5px;color:var(--txt-faint);letter-spacing:.06em;text-transform:uppercase;font-weight:700;margin-bottom:6px}
.kv dd{margin:0;font-size:15.5px;color:var(--txt-d);font-weight:600;word-break:break-word}
.sec--light .kv dd,.sec--white .kv dd{color:var(--txt-d)}
.acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.sec--light .acc,.sec--white .acc{border-color:var(--line-d)}
.acc details{border-bottom:1px solid var(--line)}
.sec--light .acc details,.sec--white .acc details{border-color:var(--line-d)}
.acc details:last-child{border-bottom:0}
.acc summary{padding:19px 24px;cursor:pointer;font-weight:700;font-size:15.5px;display:flex;align-items:center;justify-content:space-between;gap:16px;list-style:none;color:var(--txt-d);transition:background .2s}
.sec--light .acc summary,.sec--white .acc summary{color:var(--txt-d)}
.acc summary::-webkit-details-marker{display:none}
.acc summary:hover{background:rgba(176,28,34,.06)}
.acc summary::after{content:"+";font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--red);flex:none;line-height:1;transition:transform .25s}
.acc details[open] summary::after{transform:rotate(45deg)}
.acc .acc__b{padding:0 24px 22px;color:var(--txt-dim);font-size:14.5px}
.sec--light .acc .acc__b,.sec--white .acc .acc__b{color:var(--txt-d-dim)}
.newslist{display:grid;gap:14px}
.newsitem{display:grid;grid-template-columns:104px 1fr auto;gap:24px;align-items:center;padding:22px 24px;border:1px solid var(--line);border-radius:var(--r);background:var(--panel);transition:border-color .25s,transform .25s var(--ease),background .25s}
.sec--light .newsitem,.sec--white .newsitem{background:#fff;border-color:var(--line-d);box-shadow:var(--shadow-l)}
.newsitem:hover{border-color:var(--red-a45);transform:translateX(4px);background:var(--ink-3)}
.sec--light .newsitem:hover,.sec--white .newsitem:hover{background:#fff}
.newsitem time{font-family:var(--font-num);font-size:15px;font-weight:700;color:var(--txt-faint);line-height:1.35}
.newsitem time b{display:block;font-size:30px;color:var(--txt-d);letter-spacing:-.02em}
.sec--light .newsitem time b,.sec--white .newsitem time b{color:var(--txt-d)}
.newsitem h3{font-size:17px;margin-bottom:6px;color:var(--txt-d)}
.sec--light .newsitem h3,.sec--white .newsitem h3{color:var(--txt-d)}
.newsitem p{font-size:13.5px;color:var(--txt-dim);margin:0}
.sec--light .newsitem p,.sec--white .newsitem p{color:var(--txt-d-dim)}
.job{border:1px solid var(--line);border-radius:var(--r);background:var(--panel);padding:26px}
.sec--light .job,.sec--white .job{background:#fff;border-color:var(--line-d);box-shadow:var(--shadow-l)}
.job h3{font-size:18px;color:var(--txt-d);display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.sec--light .job h3,.sec--white .job h3{color:var(--txt-d)}
.job dl{display:grid;gap:10px;margin:0}
.job dl>div{display:flex;gap:12px;font-size:14px}
.job dt{color:var(--txt-faint);flex:none;min-width:64px;font-weight:600}
.sec--light .job dt,.sec--white .job dt{color:#98A0A8}
.job dd{margin:0;color:var(--txt)}
.sec--light .job dd,.sec--white .job dd{color:var(--txt-d)}

/* ---------- 19. 页脚 ---------- */
.foot{background:var(--ink-2);border-top:1px solid var(--line);padding:64px 0 0;font-size:14px}
.foot__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.foot h4{font-size:14px;color:var(--txt-d);letter-spacing:.06em;text-transform:uppercase;margin-bottom:18px;position:relative;padding-bottom:12px}
.foot h4::after{content:"";position:absolute;left:0;bottom:0;width:22px;height:2px;background:var(--red)}
.foot__brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot p{color:var(--txt-dim);font-size:13.5px;line-height:1.85;margin:0}
.foot__links{display:grid;gap:11px}
.foot__links a{color:var(--txt-dim);transition:color .2s;display:inline-flex;align-items:center;gap:8px}
.foot__links a:hover{color:var(--red)}
.foot__links a svg{width:13px;height:13px;opacity:.6}
.foot__contact{display:grid;gap:13px}
.foot__contact li{display:flex;gap:11px;align-items:flex-start;color:var(--txt-dim);font-size:13.5px;line-height:1.7}
.foot__contact svg{width:16px;height:16px;color:var(--red);flex:none;margin-top:3px}
.foot__qr{display:flex;gap:14px;align-items:center;margin-top:18px}
.foot__qr div{width:96px;height:96px;border-radius:var(--r-s);overflow:hidden;background:#fff;border:1px solid var(--line);flex:none}
.foot__qr img{width:100%;height:100%;object-fit:cover}
.foot__qr span{font-size:12.5px;color:var(--txt-faint);line-height:1.6}
.foot__bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12.5px;color:var(--txt-faint)}
.foot__bottom a:hover{color:var(--red)}

/* ---------- 20. 浮动按钮 ---------- */
.fabs{position:fixed;right:20px;bottom:24px;z-index:70;display:flex;flex-direction:column;gap:12px}
.fab{width:58px;height:58px;border-radius:16px;border:1px solid var(--line-d);background:rgba(255,255,255,.94);backdrop-filter:blur(8px);display:grid;place-items:center;cursor:pointer;transition:transform .25s var(--ease),background .25s,border-color .25s;position:relative}
.fab svg{width:25px;height:25px;color:var(--red)}
.fab{animation:fabPulse 2.4s var(--ease) infinite}
.fab:hover{animation-play-state:paused}
.fab:hover svg{color:#fff}
.fab:hover{transform:translateY(-3px);background:var(--red);border-color:var(--red)}
.fab:hover svg{color:#fff}
.fab--up{opacity:0;pointer-events:none}
.fab--up.show{opacity:1;pointer-events:auto}
.fab__tip{position:absolute;right:calc(100% + 10px);top:50%;transform:translateY(-50%);background:#fff;border:1px solid var(--line-d);padding:6px 12px;border-radius:7px;font-size:12.5px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s}
.fab:hover .fab__tip{opacity:1}

/* ---------- 21. 滚动入场 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .68s var(--ease),transform .68s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.07s}
.reveal[data-d="2"]{transition-delay:.14s}
.reveal[data-d="3"]{transition-delay:.21s}
.reveal[data-d="4"]{transition-delay:.28s}
.reveal[data-d="5"]{transition-delay:.35s}
.reveal[data-d="6"]{transition-delay:.42s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1080px){
  :root{--pad:20px}
  .sec{padding:76px 0}
  .cards,.cards--3,.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{gap:40px}
  .cta .wrap{grid-template-columns:1fr;gap:34px}
  .foot__grid{grid-template-columns:1fr 1fr;gap:32px}
  .flow{grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 0}
  .flow::before{display:none}
  .gallery--sp figure:nth-child(1){grid-row:auto}
  .gallery--sp figure:nth-child(1) img{aspect-ratio:4/3}
  .hero__tags{display:none}
  /* 导航：桌面菜单容纳不下时提前切汉堡菜单（实测需要 ~1040px） */
  .nav__burger{display:grid;margin-left:auto}
  .menu{
    position:absolute;top:100%;right:0;width:min(82vw,340px);
    background:#fff;border:1px solid var(--line);border-top:none;
    border-radius:0 0 var(--r) var(--r);
    box-shadow:0 28px 56px -26px rgba(20,26,38,.3);
    padding:8px 0 14px;overflow-y:auto;max-height:calc(100dvh - var(--nav-h) - 16px);
    opacity:0;transform:translateY(-10px);pointer-events:none;visibility:hidden;
    transition:opacity .22s var(--ease),transform .26s var(--ease),visibility .26s;margin-left:0;
  }
  .menu.open{opacity:1;transform:none;pointer-events:auto;visibility:visible}
  .menu ul{flex-direction:column;align-items:stretch;gap:2px}
  .menu a{padding:15px 14px;font-size:16.5px;border-bottom:1px solid var(--line)}
  .menu a::after{display:none}
  .menu a.on{color:var(--red);background:var(--red-a12)}
  .nav__cta{display:none}
}
@media (max-width:860px){
  .hero__inner{padding:76px 0 84px 24px}
  .hero__inner::after{top:64px;bottom:64px}
  .ticks{grid-template-columns:1fr;max-width:none}
  .split,.split--rev{grid-template-columns:1fr}
  .split--rev .split__media{order:0}
  .split__media,.split__media--wide{order:-1}
  .flist{grid-template-columns:1fr}
  .form{grid-template-columns:1fr}
  .kv{grid-template-columns:1fr}
  .newsitem{grid-template-columns:1fr;gap:12px}
  .newsitem time{display:flex;align-items:baseline;gap:8px}
  .newsitem time b{font-size:22px}
  .foot__grid{grid-template-columns:1fr;gap:24px}
  .sec--tight{padding:40px 0}
  .cta{padding:48px 0}
  /* 按钮统一：主按钮 ≥48px 触控目标，次按钮 44px，圆角 10px */
  .btn{min-height:48px;padding:12px 24px;font-size:15px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;text-align:center}
  .btn--sm{min-height:44px}
}
@media (max-width:620px){
  :root{--pad:16px;--nav-h:64px}
  body{font-size:14px;line-height:1.65}
  .sec{padding:44px 0}
  .cards,.cards--3,.cards--2,.gallery,.gallery--3{grid-template-columns:1fr}
  .cards{gap:16px}
  .stats__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat{padding:16px 10px}
  .stat b{font-size:clamp(26px,8vw,34px)}
  .stat span{font-size:12px;margin-top:8px}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 0}
  .flow .fd{width:48px;height:48px;font-size:17px;margin-bottom:10px}
  .flow b{font-size:13.5px}
  .flow span{font-size:12px}
  .topbar{font-size:12px}
  .topbar__points{display:none}
  .topbar .wrap{justify-content:flex-end;min-height:40px;gap:12px}
  .topbar__tel{font-size:15px;padding:8px 0}
  .lang a{font-size:12px;padding:6px 10px}
  .head{margin-bottom:26px}
  .eyebrow{font-size:11px;margin-bottom:12px}
  .head h2{font-size:22px;margin-bottom:12px}
  .head p{font-size:14px}
  .hero{min-height:auto}
  
  .hero__inner::after{display:none}
  .hero .eyebrow{padding-left:0}
  
  .hero__sub{font-size:14px;margin-bottom:18px}
  .ticks{gap:8px 18px;margin-bottom:22px}
  .ticks li{font-size:14px}
  .hero__cta{flex-direction:column;gap:12px}
  .hero__cta .btn{width:100%}
  .hero__note{font-size:12px;margin-top:14px}
  .cta__actions{flex-direction:column}
  .cta__actions .btn{width:100%}
  /* 联系页占位卡双按钮：容器是无类名 div，用 :has 定位后堆叠全宽 */
  .card>div:has(> .btn){flex-direction:column;align-items:stretch;gap:10px}
  .card>div:has(> .btn)>.btn{width:100%}
  .cta p{margin-bottom:18px}
  .cta__box{padding:18px}
  .cta__box ul{gap:10px}
  .cta__box li{font-size:13.5px}
  .brand__mark{width:36px;height:36px;font-size:18px}
  .brand__cn{font-size:15px}
  .brand__en{display:none}
  .menu a{font-size:15px;padding:13px 12px}
  .btn--sm{font-size:13px;padding:9px 16px}
  .tag{font-size:12px;padding:5px 11px;white-space:nowrap}
  .tags{gap:7px}
  .card{padding:20px 16px;gap:10px}
  .card h3{font-size:17px}
  .card p{font-size:13.5px}
  .card__more{font-size:13px}
  .pcard__media{aspect-ratio:4/3}
  .pcard__body{padding:16px 16px 18px;gap:10px}
  .pcard__body h3{font-size:16px}
  .pcard__body p{font-size:13.5px}
  .specs{gap:6px;padding-top:10px}
  .specs>div{font-size:12.5px}
  .mtable{font-size:12px}
  .mtable th{font-size:11px}
  .mtable th,.mtable td{padding:7px 8px}
  .split__media img{aspect-ratio:16/10}
  .split__badge{font-size:13px;padding:10px 16px}
  .split__body h2{font-size:21px;margin-bottom:14px}
  .split__body p{margin-bottom:12px}
  .flist{gap:10px 18px;margin-top:18px}
  .flist .fi{width:32px;height:32px}
  .flist .fi svg{width:16px;height:16px}
  .flist b{font-size:13.5px}
  .flist span{font-size:12.5px}
  .gallery{gap:10px}
  .gallery figure{aspect-ratio:4/3}
  .gallery figcaption{font-size:13px;padding:26px 16px 12px}
  /* 证书墙：含竖版原件的画廊改横向滚动，保证可读 */
  .gallery:has(> figure.doc){display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;gap:12px;padding-bottom:6px}
  .gallery:has(> figure.doc) figure{flex:0 0 auto;width:70vw;max-width:none;scroll-snap-align:start}
  .gallery:has(> figure.doc) figure.doc{aspect-ratio:auto}
  .newslist{gap:10px}
  .newsitem{padding:16px}
  .newsitem h3{font-size:15.5px}
  .newsitem p{font-size:12.5px}
  .newsitem time{font-size:13px}
  .newsitem time b{font-size:20px}
  .job{padding:18px}
  .job h3{font-size:16px;margin-bottom:10px}
  .job dl{gap:8px}
  .job dl>div{font-size:13px}
  .acc summary{padding:15px 18px;font-size:14.5px}
  .acc .acc__b{padding:0 18px 16px;font-size:13.5px}
  .note{font-size:13.5px;padding:12px 16px}
  .quote{font-size:14px;padding-left:16px}
  .kv>div{padding:14px 16px}
  .kv dt{font-size:11.5px}
  .kv dd{font-size:14px}
  .phead{padding:44px 0 38px}
  .phead h1{font-size:24px;margin-bottom:10px}
  .phead p{font-size:14px}
  .phead__tags{margin-top:16px}
  .crumb{font-size:12px;margin-bottom:12px}
  .form{gap:14px}
  .field label{font-size:13px}
  .field input,.field select,.field textarea{font-size:14px;padding:12px 14px}
  .field textarea{min-height:100px}
  .upload{padding:18px 16px}
  .upload b{font-size:13.5px}
  .form__msg{font-size:13.5px;padding:12px 14px}
  .filter{margin-bottom:24px;gap:8px}
  .chip{font-size:13px;padding:9px 18px;white-space:nowrap}
  .foot{padding-top:40px}
  .foot p{font-size:12.5px}
  .foot h4{font-size:13px;margin-bottom:14px;padding-bottom:10px}
  .foot__grid{gap:24px}
  .foot__links{gap:9px}
  .foot__contact{gap:10px}
  .foot__contact li{font-size:12.5px}
  .foot__qr{margin-top:14px}
  .foot__qr div{width:84px;height:84px}
  .foot__qr span{font-size:12px}
  .foot__bottom{padding:16px 0;font-size:12px}
  .fabs{right:12px;bottom:14px}
  .fab{width:44px;height:44px}
  .gallery--sp{grid-template-columns:1fr}
  .tbl{font-size:13px}
  .tbl th,.tbl td{padding:11px 12px}
}
@media (max-width:430px){
  body{font-size:13.5px}
  
  .hero__title em{text-wrap:balance}
  .brand__cn{font-size:15px}
  .brand__en{font-size:9px;letter-spacing:.06em}
  .nav__cta{padding:10px 14px;font-size:13px}
  .nav__cta svg{display:none}
  .stat{padding:13px 8px}
  .stat b{font-size:clamp(19px,5.9vw,24px);letter-spacing:-.03em}
  .card{padding:16px 14px}
  .foot__grid{gap:20px}
  .sec{padding:40px 0}
}

/* ---------- 24. 筛选 chips ---------- */
.filter{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.chip{padding:9px 20px;border:1px solid var(--line-2);border-radius:100px;background:transparent;color:var(--txt);font-size:14px;font-weight:600;cursor:pointer;transition:all .22s var(--ease)}
.chip:hover{border-color:var(--red);color:var(--red)}
.chip.on{background:var(--red);border-color:var(--red);color:#fff}
.sec--light .chip,.sec--white .chip{border-color:var(--line-d);color:var(--txt-d-dim);background:#fff}
.sec--light .chip:hover,.sec--white .chip:hover{border-color:var(--red);color:var(--red)}
.sec--light .chip.on,.sec--white .chip.on{background:var(--red);border-color:var(--red);color:#fff}

/* ---------- 25. 打印 ---------- */
@media print{
  .nav,.topbar,.fabs,.cta,.foot__qr{display:none}
  body{background:#fff;color:#000}
  .sec{padding:20px 0;page-break-inside:avoid}
}

/* ---------- R2: 首页背景动效（Ken Burns） ---------- */
@keyframes hero-kb{from{transform:scale(1) translate(0,0)}to{transform:scale(1.12) translate(-1.6%,1.2%)}}
img.hero__bg{animation:hero-kb 26s ease-in-out infinite alternate;will-change:transform}
@media (prefers-reduced-motion:reduce){.hero__bg{animation:none}}
.media-ph{display:grid;place-items:center;aspect-ratio:16/9;border:1.5px dashed var(--line-2);border-radius:var(--r);color:var(--txt-d-dim);font-size:13.5px;letter-spacing:.1em;background:rgba(127,127,127,.04)}

/* ---------- R2: 可折叠列表（材料牌号 / 表面处理） ---------- */
.mtable tr.xtra{display:none}
[data-collapse].open .mtable tr.xtra{display:table-row}
.tags .tag.xtra{display:none}
[data-collapse].open .tags .tag.xtra{display:inline-flex}
.mtoggle{display:inline-flex;align-items:center;gap:7px;margin-top:14px;padding:7px 16px;border:1px solid var(--line-2);border-radius:100px;background:transparent;color:var(--txt-faint);font-size:12.5px;font-weight:600;letter-spacing:.03em;cursor:pointer;transition:all .25s var(--ease)}
.mtoggle:hover{color:var(--red);border-color:var(--red-a45)}
.mtoggle svg{width:14px;height:14px;transition:transform .3s var(--ease)}
.mtoggle.open svg{transform:rotate(180deg)}
.sec--light .mtoggle,.sec--white .mtoggle{border-color:var(--line-d);color:var(--txt-d-dim)}
.sec--light .mtoggle:hover,.sec--white .mtoggle:hover{color:var(--red);border-color:var(--red-a45)}