/* ============================================================
   闽大机械 · 深色工业风 styles（回到换肤前的深色工业风版本）
   配色参考初始工业风模板：近黑背景 + 工业橙强调 + 深色卡片
   ============================================================ */
:root{
  --primary:#ff8a1e;
  --primary-dark:#ff6a00;
  --gold-2:#ffa94d;
  --gold-deep:#ff6a00;
  --accent:#ff5252;
  --ink:#f2f5fa;
  --text:#cbd4e2;
  --muted:#9aa3b2;
  --bg:#0e0f12;
  --bg-soft:#131519;
  --bg-soft2:#1a1d24;
  --card:#191c22;
  --card-2:#20242c;
  --border:rgba(255,255,255,.1);
  --radius:14px;
  --maxw:1200px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-lg:0 18px 50px rgba(0,0,0,.55);
  --header-h:76px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
body{
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  color:var(--text);font-size:15px;line-height:1.75;background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{scroll-margin-top:var(--header-h)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;
  cursor:pointer;border:1px solid transparent;transition:.25s ease;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));color:#1a1206;box-shadow:0 8px 20px rgba(255,138,30,.3)}
.btn-primary:hover{background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,138,30,.42)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,138,30,.12);color:var(--gold-2)}
.btn-ghost.light{border-color:rgba(255,255,255,.85)}
.btn.full{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:linear-gradient(180deg,rgba(8,9,12,.98) 0%,rgba(10,11,15,.92) 35%,rgba(12,13,17,.6) 70%,rgba(14,15,18,0) 100%);
  border-bottom:none;transition:.3s ease;
}
.site-header.scrolled{
  background:linear-gradient(180deg,rgba(8,9,12,.98) 0%,rgba(14,15,18,.92) 100%);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  box-shadow:0 6px 24px rgba(0,0,0,.5);border-bottom:none;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:12px;min-width:0;flex:0 1 auto}
.brand-logo{display:flex;align-items:center;justify-content:center;height:auto;flex:0 0 auto}
.brand-mark{display:block;height:42px;width:auto;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0;max-width:240px}
.brand-text strong{font-size:15px;font-weight:800;letter-spacing:.2px;color:var(--ink);white-space:nowrap}
.brand-text em{font-size:8px;letter-spacing:.2px;color:var(--primary);font-style:normal;opacity:.9;line-height:1.4;margin-top:2px}

.main-nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:6px;list-style:none}
.main-nav .nav-link{
  position:relative;display:inline-flex;align-items:center;gap:4px;
  padding:10px 14px;font-size:15px;color:var(--text);font-weight:500;transition:color .2s;border-radius:8px;
}
.main-nav .nav-link:hover{color:var(--primary)}
.main-nav .nav-link.active,.main-nav .nav-link:hover{color:var(--primary)}
.main-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--primary);transform:scaleX(0);transition:transform .25s;transform-origin:center;
}
.main-nav .nav-link:hover::after{transform:scaleX(1)}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;margin-top:2px}
.nav-item{position:relative}
.dropdown{
  position:absolute;top:100%;left:0;min-width:180px;background:var(--card);
  border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-lg);
  padding:8px 0;list-style:none;opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s;z-index:20;
}
.nav-item.has-dropdown:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown li a{display:block;padding:9px 18px;font-size:14px;color:var(--text);white-space:nowrap}
.dropdown li a:hover{background:var(--card-2);color:var(--primary)}
.nav-cta{background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));color:#1a1206!important;padding:9px 22px;margin-left:6px}
.nav-cta::after{display:none}
.nav-cta:hover{background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:2px;background:var(--ink);transition:.3s;border-radius:2px}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Banner 轮播 ---------- */
.banner{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;overflow:hidden;background:var(--bg)}
.banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;z-index:2;background:linear-gradient(180deg,rgba(14,15,18,0),var(--bg));pointer-events:none}
.banner-track{position:absolute;inset:0;display:flex;transition:transform .9s ease}
.banner-track .slide{position:relative;flex:0 0 100%;background-size:cover;background-position:center}
.slide-mask{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,10,16,.82) 0%,rgba(8,10,16,.66) 50%,rgba(8,10,16,.52) 100%);}
.banner-content{position:relative;z-index:3;padding-top:112px;padding-bottom:88px;color:#fff;width:100%;text-align:center}
.banner-head{display:inline-block;max-width:100%}
.banner-title{
  font-size:clamp(40px,6.4vw,72px);font-weight:800;line-height:1.08;letter-spacing:2px;
  text-shadow:0 8px 30px rgba(0,0,0,.5);
}
.banner-motto{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap;
  width:100%;gap:0;margin:18px 0 0;padding:0;list-style:none;
}
.banner-motto li{
  font-size:clamp(22px,2.9vw,30px);font-weight:700;letter-spacing:2px;color:#fff;
  white-space:nowrap;
}
.banner-motto li.motto-dot{
  flex:0 0 auto;font-size:clamp(16px,2vw,20px);font-weight:400;letter-spacing:0;opacity:.55;
}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  margin:56px auto 0;max-width:780px;
  border-top:1px solid rgba(255,255,255,.18);padding-top:30px;
}
.hero-stats .stat{text-align:center}
.hero-stats .stat b{display:block;font-size:clamp(26px,3.6vw,40px);font-weight:800;color:var(--gold-2);line-height:1}
.hero-stats .stat b[data-suffix]::after{content:attr(data-suffix)}
.hero-stats .stat span{font-size:13px;color:rgba(255,255,255,.78)}

.banner-dots{position:absolute;left:0;right:0;bottom:26px;z-index:4;display:flex;justify-content:center;gap:10px}
.banner-dots .dot{width:30px;height:4px;border-radius:4px;background:rgba(255,255,255,.4);cursor:pointer;transition:.25s;border:0;padding:0}
.banner-dots .dot.active{background:var(--gold-2);width:42px}

/* ---------- 通用 section ---------- */
.section{padding:88px 0}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:760px;margin:0 auto 50px;text-align:center}
.section-head.left{margin:0 0 24px;text-align:left}
.section-head .kicker{display:inline-flex;align-items:center;gap:12px;font-size:13px;letter-spacing:4px;color:var(--primary);font-weight:700;margin-bottom:14px}
.section-head .kicker::before,.section-head .kicker::after{content:"";width:28px;height:1px;background:linear-gradient(90deg,transparent,var(--primary))}
.section-head .kicker::after{background:linear-gradient(90deg,var(--primary),transparent)}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--ink);letter-spacing:1px}
.section-head p{margin-top:14px;color:var(--text);font-size:16px}

/* ---------- 公司简介 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.about-feats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px;list-style:none}
.about-feats li{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px 12px;text-align:center;box-shadow:var(--shadow)}
.about-feats .af-n{display:block;font-size:20px;font-weight:800;color:var(--primary);line-height:1.1}
.about-feats .af-n i{font-size:12px;font-style:normal;margin-left:2px;font-weight:600}
.about-feats .af-t{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.about-media{position:relative}
.about-photo{height:420px;border-radius:var(--radius);background-size:cover;background-position:center;box-shadow:var(--shadow-lg)}

/* ---------- 核心优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.adv-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px 28px;
  transition:.3s ease;position:relative;overflow:hidden;
}
.adv-card::before{content:"";position:absolute;left:0;top:0;width:4px;height:0;background:var(--primary);transition:.3s}
.adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,138,30,.4)}
.adv-card:hover::before{height:100%}
.adv-ico{width:64px;height:64px;display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:18px;border-radius:16px;background:rgba(255,138,30,.1);border:1px solid rgba(255,138,30,.18);transition:.3s}
.adv-card:hover .adv-ico{background:rgba(255,138,30,.18);transform:scale(1.05)}
.adv-card h3{font-size:20px;color:var(--ink);margin-bottom:10px;letter-spacing:.5px}
.adv-card p{color:var(--text);font-size:14.5px}

/* ---------- 产品中心 ---------- */
.product-grid{display:flex;flex-direction:column;gap:32px;max-width:960px;margin:0 auto}
.product-card{
  display:grid;grid-template-columns:1fr 1fr;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;transition:.3s ease;position:relative;
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,138,30,.4)}
.pc-thumb{
  position:relative;min-height:300px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#1b1f27,#12151b);border-right:1px solid var(--border);overflow:hidden;
}
.pc-thumb .pc-ico{font-size:46px;color:rgba(255,138,30,.6)}
.pc-thumb.is-photo{
  padding:20px;background-color:#0f1218;background-size:cover;background-repeat:no-repeat;
  background-position:center;background-origin:border-box;
}
.pc-thumb.is-photo::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 60px rgba(8,10,16,.4);pointer-events:none}
.pc-thumb.is-photo .pc-ico{display:none}
.pc-overlay{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(8,10,16,.45);color:#fff;font-weight:600;letter-spacing:3px;font-size:15px;
  opacity:0;transition:.3s;
}
.product-card:hover .pc-overlay{opacity:1}
.pc-body{padding:44px 40px;display:flex;flex-direction:column;justify-content:center}
.pc-body h3{font-size:26px;color:var(--ink);margin-bottom:14px;letter-spacing:.5px}
.pc-body p{color:var(--text);font-size:15px;line-height:1.9}
.pc-tags{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.pc-tags span{font-size:13px;color:var(--primary);background:rgba(255,138,30,.12);padding:6px 16px;border-radius:999px;font-weight:600}
.product-card:nth-child(even) .pc-thumb{order:2;border-right:0;border-left:1px solid var(--border)}
.product-card:nth-child(even) .pc-body{order:1}

/* ---------- 厂房设备 ---------- */
.equip-showcase{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}
.equip-photo{height:460px;border-radius:var(--radius);background-size:cover;background-position:center;box-shadow:var(--shadow-lg)}
.equip-list{display:flex;flex-direction:column;gap:14px}
.equip-item{display:flex;gap:18px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 22px;transition:.25s}
.equip-item:hover{box-shadow:var(--shadow);border-color:rgba(255,138,30,.4);transform:translateX(4px)}
.equip-item .ei-no{font-size:26px;font-weight:800;color:rgba(255,138,30,.3);line-height:1.2;min-width:42px}
.equip-item h3{font-size:17px;color:var(--ink);margin-bottom:6px}
.equip-item p{font-size:14px;color:var(--text)}

.equip-gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:44px}
.equip-card{margin:0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.3s}
.equip-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(255,138,30,.45)}
.ec-photo{height:150px;background-size:cover;background-position:center;background-color:#11141a}
.equip-card figcaption{padding:16px 18px 18px}
.equip-card h4{font-size:15.5px;color:var(--ink);margin-bottom:6px;letter-spacing:.3px}
.equip-card p{font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- 实力认证 ---------- */
.cert-showcase{display:grid;grid-template-columns:.86fr 1.14fr;gap:52px;align-items:center}
.cert-photo{
  position:relative;display:block;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);box-shadow:var(--shadow-lg);background:#fff;
}
.cert-photo img{display:block;width:100%;height:auto}
.cert-zoom{
  position:absolute;left:0;right:0;bottom:0;padding:14px;text-align:center;
  background:linear-gradient(transparent,rgba(8,10,16,.86));color:#fff;font-size:13px;letter-spacing:1px;
  opacity:0;transition:.3s;
}
.cert-photo:hover .cert-zoom{opacity:1}
.cert-tag{
  display:inline-block;font-size:12px;letter-spacing:2px;color:#1a1206;font-weight:700;
  background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));
  padding:5px 14px;border-radius:999px;margin-bottom:14px;
}
.cert-info h3{font-size:clamp(22px,2.6vw,30px);color:var(--ink);margin-bottom:14px;letter-spacing:.5px}
.cert-info>p{color:var(--text);font-size:15px;line-height:1.9}
.cert-info>p b{color:var(--primary);font-weight:700}
.cert-meta{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0 26px}
.cert-meta li{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:13px 16px}
.cert-meta b{display:block;font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.5px;margin-bottom:4px}
.cert-meta span{font-size:14.5px;color:var(--ink);font-weight:600}
.cert-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.cert-note{font-size:13px;color:var(--muted)}
.cert-showcase + .cert-showcase{margin-top:60px;padding-top:60px;border-top:1px solid var(--border)}
.cert-showcase.reverse{grid-template-columns:1.14fr .86fr}
.cert-showcase.reverse .cert-photo{order:2}
.cert-showcase.reverse .cert-info{order:1}

/* ---------- 企业荣誉 ---------- */
.honor-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.honor-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 24px 30px;text-align:center;transition:.3s}
.honor-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,138,30,.45)}
.honor-media{position:relative;display:block;height:210px;margin-bottom:20px;border-radius:10px;overflow:hidden;background:#fff;border:1px solid rgba(255,255,255,.08)}
.honor-media img{width:100%;height:100%;object-fit:contain;display:block}
.honor-zoom{position:absolute;left:0;right:0;bottom:0;padding:10px;text-align:center;font-size:12px;letter-spacing:1px;color:#fff;background:linear-gradient(transparent,rgba(8,10,16,.82));opacity:0;transition:.3s}
.honor-media:hover .honor-zoom{opacity:1}
.honor-media.is-badge{display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,var(--card-2),var(--bg-soft2));border-color:var(--border)}
.honor-badge{width:76px;height:76px;margin:0;border-radius:50%;background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));color:#1a1206;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;box-shadow:0 10px 26px rgba(255,138,30,.28)}
.honor-card h3{font-size:17px;color:var(--ink);margin-bottom:10px}
.honor-card p{font-size:14px;color:var(--text);line-height:1.8}

/* ---------- 合作伙伴 ---------- */
.partner-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.partner-item{
  height:132px;border:1px solid var(--border);border-radius:12px;background:var(--card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  color:var(--text);transition:.25s;
}
.partner-item .pi-ico{font-size:30px;line-height:1;filter:grayscale(.2);transition:.25s}
.partner-item .pi-t{font-size:14px;font-weight:600;letter-spacing:1px}
.partner-item:hover{border-color:rgba(255,138,30,.5);background:rgba(255,138,30,.06);transform:translateY(-4px)}
.partner-item:hover .pi-ico{filter:none;transform:scale(1.12)}
.partner-item:hover .pi-t{color:var(--primary)}

/* ---------- 联系我们 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info{display:flex;flex-direction:column;gap:24px}
.map-card{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
.map-placeholder{position:relative;height:240px;background:linear-gradient(135deg,#1a2233,#141c2b);display:flex;align-items:center;justify-content:center}
.map-pin{font-size:46px;filter:drop-shadow(0 6px 10px rgba(0,0,0,.4))}
.map-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,138,30,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,138,30,.08) 1px,transparent 1px);
  background-size:36px 36px;}
.map-link{display:block;text-align:center;padding:12px;color:var(--primary);font-weight:600;font-size:14px;border-top:1px solid var(--border)}
.info-list{list-style:none;display:flex;flex-direction:column;gap:16px}
.info-list li{display:flex;gap:14px;align-items:flex-start;font-size:15px;color:var(--ink)}
.info-list .ic{font-size:22px;line-height:1.2}
.info-list b{display:block;margin-bottom:3px}
.info-list a{color:var(--primary)}

.contact-form{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.contact-form h3{font-size:20px;color:var(--ink);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--text);margin-bottom:7px;font-weight:500}
.field input,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:15px;
  font-family:inherit;color:var(--ink);background:var(--card-2);transition:.2s;resize:vertical;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);background:var(--card-2);box-shadow:0 0 0 3px rgba(255,138,30,.15)}
.field input.invalid,.field textarea.invalid{border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,82,82,.15)}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-note{font-size:14px;margin-top:12px;min-height:18px}
.form-note.err{color:var(--accent)}
.form-note.ok{color:#3ec97a}

/* ---------- 页脚 ---------- */
.site-footer{background:#0c0e13;color:#9aa3b2;padding:64px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 2fr;gap:48px}
.footer-brand strong{color:#fff;font-size:18px;letter-spacing:1px}
.footer-brand p{margin-top:14px;font-size:14px;color:#7e8794;line-height:1.9;max-width:420px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social .fs{font-size:13px;color:#9aa3b2;border:1px solid rgba(255,255,255,.2);padding:6px 14px;border-radius:999px}
.footer-social .fs:hover{background:var(--primary);border-color:var(--primary);color:#1a1206}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h4{color:#fff;font-size:16px;margin-bottom:16px;position:relative;padding-left:12px}
.footer-cols h4::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:3px;background:var(--primary);border-radius:3px}
.footer-cols a,.footer-cols .ft-addr{display:block;font-size:14px;color:#7e8794;margin-bottom:10px;transition:.2s}
.footer-cols a:hover{color:#fff;padding-left:4px}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px;color:#6b7488}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom a{color:#7e8794}
.footer-bottom a:hover{color:#fff}

/* ---------- 返回顶部 ---------- */
.scrollToTop{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;
  background:var(--primary);color:#1a1206;display:flex;align-items:center;justify-content:center;
  font-size:22px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:.3s;z-index:90;
}
.scrollToTop.show{opacity:1;visibility:visible;transform:translateY(0)}
.scrollToTop:hover{background:var(--primary-dark)}

/* ---------- 提示 toast ---------- */
.toast{
  position:fixed;left:50%;top:26px;transform:translateX(-50%) translateY(-20px);
  background:var(--card-2);color:#fff;padding:14px 26px;border-radius:10px;font-size:15px;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:.3s;z-index:200;
}
.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

/* ---------- 滚动揭示 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* ---------- 减少动态效果偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .about-grid,.equip-showcase,.cert-showcase,.cert-showcase.reverse,.contact-wrap{grid-template-columns:1fr;gap:36px}
  .cert-showcase.reverse .cert-photo,.cert-showcase.reverse .cert-info{order:0}
  .adv-grid,.honor-grid{grid-template-columns:repeat(2,1fr)}
  .equip-gallery{grid-template-columns:repeat(3,1fr)}
  .partner-grid{grid-template-columns:repeat(3,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:32px}
}
@media (max-width:1180px){
  .main-nav .nav-link{padding:10px 11px;font-size:14px}
}
@media (max-width:1080px){
  .nav-toggle{display:flex}
  .main-nav{
    position:absolute;top:var(--header-h);left:0;right:0;background:var(--card);
    padding:10px 16px 18px;box-shadow:var(--shadow-lg);border-bottom:1px solid var(--border);
    max-height:0;overflow:hidden;transition:max-height .3s ease;visibility:hidden;
  }
  .main-nav.open{max-height:760px;visibility:visible;overflow:auto}
  .main-nav .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .main-nav .nav-link{padding:13px 6px;border-bottom:1px solid var(--border)}
  .main-nav .nav-link::after{display:none}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 6px 14px}
  .nav-cta{margin:10px 6px 0;text-align:center}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:14px}
}
@media (max-width:600px){
  .section{padding:60px 0}
  .adv-grid,.honor-grid{grid-template-columns:1fr}
  .product-card{grid-template-columns:1fr}
  .product-card .pc-thumb{min-height:220px;border-right:0;border-left:0!important;order:1}
  .product-card .pc-body{order:2;padding:28px 24px}
  .product-card:nth-child(even) .pc-thumb{order:1}
  .product-card:nth-child(even) .pc-body{order:2}
  .equip-gallery{grid-template-columns:repeat(2,1fr);gap:12px}
  .ec-photo{height:120px}
  .cert-meta{grid-template-columns:1fr}
  .partner-grid{grid-template-columns:repeat(2,1fr)}
  .about-feats{grid-template-columns:repeat(2,1fr)}
  .footer-cols{grid-template-columns:1fr 1fr}
  .footer-bottom .container{flex-direction:column}
  .banner-title{font-size:38px}
}