/* ============================================================
   上海晁祥轴承 · 主样式表  v2.0
   Industrial · Metal · Tech
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* Brand — 深空灰 + 钢蓝 + 暖金 */
  --color-bg:            #FFFFFF;
  --color-bg-soft:       #F4F6F9;
  --color-bg-muted:      #EAEEF3;
  --color-bg-panel:      #11151D;          /* 深空黑（卡片底部） */

  --color-primary:       #0A2540;          /* 深精密蓝 */
  --color-primary-light: #1B365D;
  --color-primary-dark:  #050E1A;

  --color-steel:         #3D4A5C;          /* 钢蓝灰 */
  --color-steel-light:   #6B7B8C;
  --color-iron:          #1A1F2B;          /* 深空铁灰 */
  --color-line:          #D6DBE2;          /* 金属拉丝浅线 */
  --color-line-soft:     #E5E8EE;

  --color-accent:        #C9A961;          /* 暖金 */
  --color-accent-light:  #E0C68A;
  --color-accent-dark:   #8C6A1F;

  --color-text:          #0F1620;
  --color-text-soft:     #2F3845;
  --color-text-muted:    #5A6573;

  --color-success:       #0E7C5A;
  --color-border:        #D6DBE2;

  /* Metal Brushed Pattern */
  --bg-brushed: repeating-linear-gradient(
    90deg,
    rgba(255,255,255,0.04) 0 1px,
    rgba(0,0,0,0.03) 1px 2px
  );

  /* Type */
  --font-sans: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",
               -apple-system,BlinkMacSystemFont,"Segoe UI",
               "Helvetica Neue",Arial,sans-serif;
  --font-mono: "SF Mono","Cascadia Code",Menlo,Consolas,monospace;
  --font-tech: "Inter","SF Pro Text","PingFang SC","Microsoft YaHei",sans-serif;

  /* Layout */
  --container-max: 1240px;
  --container-pad: 28px;
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Spacing */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px;
  --space-4: 16px; --space-5: 24px; --space-6: 32px;
  --space-7: 48px; --space-8: 64px; --space-9: 96px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(10,37,64,.06);
  --shadow-md: 0 6px 20px rgba(10,37,64,.10);
  --shadow-lg: 0 16px 48px rgba(10,37,64,.16);

  /* Motion */
  --t: 200ms cubic-bezier(.4,0,.2,1);
  --t-slow: 400ms cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;line-height:1.65;
  color:var(--color-text);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--color-accent-dark)}
button{font-family:inherit;cursor:pointer}

/* ---------- Typography ---------- */
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-tech);
  font-weight:600;
  line-height:1.22;
  color:var(--color-primary);
  margin:0 0 var(--space-4);
  letter-spacing:-.015em;
}
h1{font-size:clamp(2rem,4.2vw,3.2rem);font-weight:700;letter-spacing:-.02em}
h2{font-size:clamp(1.55rem,2.8vw,2.25rem)}
h3{font-size:clamp(1.2rem,1.8vw,1.5rem)}
h4{font-size:1.0625rem;font-weight:600}
p{margin:0 0 var(--space-4)}
.lead{font-size:1.0625rem;color:var(--color-text-soft);font-weight:300;line-height:1.7}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-tech);
  font-size:.75rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.16em;
  color:var(--color-accent-dark);
  margin-bottom:var(--space-3);
}
.eyebrow::before{
  content:"";display:inline-block;
  width:24px;height:1.5px;background:var(--color-accent);
}
.text-muted{color:var(--color-text-muted)}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-pad)}
.section{padding:var(--space-9) 0}
.section-tight{padding:var(--space-7) 0}
.section-head{text-align:center;max-width:760px;margin:0 auto var(--space-7)}
.section-head p{color:var(--color-text-soft)}
.grid{display:grid;gap:var(--space-5)}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-5{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:640px){
  .grid-4{grid-template-columns:1fr}
  .grid-5{grid-template-columns:1fr}
}
.factory-mini-stats{grid-template-columns:repeat(3,1fr)}
@media(max-width:768px){
  .factory-mini-stats{grid-template-columns:1fr}
}

/* ============================================================
   Site Header
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--color-line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:linear-gradient(90deg,
    transparent 0%, var(--color-accent) 50%, transparent 100%);
  opacity:.35;
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
  height:84px;gap:var(--space-4);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--color-primary)}
.brand-logo{height:56px;width:auto;display:block}
.brand-mark{width:40px;height:40px;display:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{
  font-size:1rem;font-weight:700;color:var(--color-primary);
  letter-spacing:.01em;
}
.brand-text small{
  font-size:.7rem;font-weight:500;
  color:var(--color-text-muted);letter-spacing:.06em;
  margin-top:2px;
}

/* Nav */
.nav-main{display:flex;align-items:center;gap:var(--space-6)}
.nav-main a{
  font-size:.9375rem;font-weight:500;
  color:var(--color-text);position:relative;
  padding:6px 0;
  letter-spacing:.01em;
}
.nav-main a:hover,.nav-main a.active{color:var(--color-primary)}
.nav-main a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;
  height:2px;background:var(--color-accent);
}

/* Lang switcher */
.lang-switch{
  display:flex;align-items:center;
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  overflow:hidden;margin-left:var(--space-4);
  font-family:var(--font-tech);
}
.lang-switch button{
  background:transparent;border:0;
  padding:6px 12px;font-size:.75rem;font-weight:600;
  color:var(--color-text-muted);letter-spacing:.08em;
  transition:all var(--t);
}
.lang-switch button.active{background:var(--color-primary);color:#fff}
.lang-switch button:hover:not(.active){color:var(--color-primary);background:var(--color-bg-soft)}

.nav-toggle{
  display:none;background:transparent;border:0;
  padding:var(--space-2);color:var(--color-primary);
  font-size:1.5rem;line-height:1;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;gap:var(--space-2);
  padding:11px 26px;
  font-size:.875rem;font-weight:600;letter-spacing:.02em;
  border-radius:var(--radius-md);
  border:1px solid transparent;cursor:pointer;
  transition:all var(--t);white-space:nowrap;
  text-transform:uppercase;font-family:var(--font-tech);
}
.btn-primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}
.btn-primary:hover{background:var(--color-primary-light);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--color-accent);color:var(--color-primary-dark);border-color:var(--color-accent)}
.btn-accent:hover{background:var(--color-accent-light);color:var(--color-primary-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--color-primary);border-color:var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:#fff}
.btn-ghost{background:transparent;color:var(--color-text)}
.btn-ghost:hover{color:var(--color-primary)}
.btn-lg{padding:14px 32px;font-size:.9375rem}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;min-height:640px;
  display:flex;align-items:center;
  color:#fff;overflow:hidden;isolation:isolate;
  background:var(--color-iron);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:url('../images/hero/hero-steel.jpg') center/cover no-repeat;
  filter:contrast(1.05) brightness(.55);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(135deg, rgba(10,21,32,.92) 0%, rgba(10,21,32,.7) 50%, rgba(10,21,32,.4) 100%),
    var(--bg-brushed);
}
.hero-inner{
  display:grid;grid-template-columns:1.3fr 1fr;gap:var(--space-7);
  align-items:center;width:100%;
  padding:var(--space-7) 0;
}
.hero-content{padding:var(--space-6) 0}
.hero .eyebrow{color:var(--color-accent-light)}
.hero h1{
  color:#fff;font-size:clamp(2.1rem,4.6vw,3.5rem);
  font-weight:700;margin-bottom:var(--space-5);line-height:1.12;
}
.hero h1 .accent{
  background:linear-gradient(90deg,var(--color-accent-light),var(--color-accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{
  font-size:clamp(1rem,1.3vw,1.15rem);
  color:rgba(255,255,255,.82);
  max-width:560px;margin-bottom:var(--space-6);
}
.hero-cta{display:flex;gap:var(--space-3);flex-wrap:wrap}

.hero-stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-4);
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-md);
  padding:var(--space-5);
  position:relative;
}
.hero-stats::before{
  content:"";position:absolute;inset:0;border-radius:inherit;
  background:var(--bg-brushed);
  opacity:.5;pointer-events:none;
}
.hero-stats .stat{position:relative;padding-left:var(--space-3);border-left:2px solid var(--color-accent)}
.hero-stats .stat strong{
  display:block;font-size:2.1rem;font-weight:700;
  color:var(--color-accent);letter-spacing:-.02em;line-height:1;
  font-family:var(--font-tech);
}
.hero-stats .stat span{
  display:block;font-size:.8125rem;
  color:rgba(255,255,255,.7);margin-top:6px;line-height:1.3;
}

/* ============================================================
   高精尖技术面板 (SERIES 01 — 突出高精密)
   ============================================================ */
.tech-panel{
  background:var(--color-iron);color:#fff;
  border-radius:var(--radius-md);
  padding:var(--space-7);
  margin-top:var(--space-7);
  position:relative;overflow:hidden;
}
.tech-panel::before{
  content:"";position:absolute;inset:0;
  background:var(--bg-brushed);opacity:.45;pointer-events:none;
}
.tech-panel > *{position:relative;}
.tech-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:var(--space-5);
  margin:var(--space-5) 0 var(--space-6);
}
.tech-metrics .stat{
  position:relative;padding-left:var(--space-3);
  border-left:2px solid var(--color-accent);
}
.tech-metrics .stat strong{
  display:block;font-size:2rem;font-weight:700;
  color:var(--color-accent);line-height:1;font-family:var(--font-tech);
  letter-spacing:-.02em;
}
.tech-metrics .stat span{
  display:block;font-size:.8125rem;margin-top:6px;line-height:1.3;
  color:rgba(255,255,255,.72);
}
.tech-feats{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:var(--space-4) var(--space-6);
}
.tech-feats li{
  position:relative;padding-left:var(--space-4);
  color:rgba(255,255,255,.9);font-size:.925rem;line-height:1.55;
}
.tech-feats li::before{
  content:"◆";position:absolute;left:0;top:2px;
  color:var(--color-accent);font-size:.8rem;
}
.tech-feats li strong{color:#fff;}
@media(max-width:768px){
  .tech-metrics{grid-template-columns:repeat(2,1fr);gap:var(--space-4);}
  .tech-feats{grid-template-columns:1fr;}
}

/* ============================================================
   Card
   ============================================================ */
.card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:all var(--t);
  position:relative;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--color-accent-light)}
.card-img{
  aspect-ratio:4/3;background:var(--color-bg-soft);
  overflow:hidden;position:relative;
}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform var(--t-slow)}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:var(--space-5)}
.card-tag{
  display:inline-block;
  font-family:var(--font-tech);
  font-size:.6875rem;font-weight:700;
  color:var(--color-accent-dark);letter-spacing:.1em;
  margin-bottom:var(--space-2);
  padding:3px 8px;
  background:rgba(201,169,97,.1);
  border:1px solid rgba(201,169,97,.25);
  border-radius:var(--radius-sm);
}
.card h3{font-size:1.1875rem;margin-bottom:var(--space-3);font-weight:600}
.card p{color:var(--color-text-soft);font-size:.9375rem;margin-bottom:var(--space-3)}
.card-link{
  font-family:var(--font-tech);
  font-weight:600;font-size:.8125rem;
  color:var(--color-primary);
  display:inline-flex;align-items:center;gap:6px;
  text-transform:uppercase;letter-spacing:.06em;
}
.card-link::after{content:"→";transition:transform var(--t)}
.card-link:hover::after{transform:translateX(4px)}

/* Pill row */
.pill-row{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-4)}
.pill{
  background:var(--color-bg-muted);color:var(--color-text-soft);
  padding:5px 12px;border-radius:3px;
  font-family:var(--font-tech);
  font-size:.75rem;font-weight:500;letter-spacing:.02em;
}
.pill-accent{background:rgba(201,169,97,.12);color:var(--color-accent-dark)}
.pill-primary{background:rgba(10,37,64,.08);color:var(--color-primary)}

/* ============================================================
   Trust bar
   ============================================================ */
.trust-bar{
  background:var(--color-bg-soft);
  padding:var(--space-7) 0;
  border-top:1px solid var(--color-border);
  border-bottom:1px solid var(--color-border);
  position:relative;
}
.trust-bar::before{
  content:"";position:absolute;inset:0;
  background:var(--bg-brushed);opacity:.6;pointer-events:none;
}
.trust-grid{
  display:grid;grid-template-columns:1fr 2.2fr;gap:var(--space-6);
  align-items:center;position:relative;
}
.trust-list{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-3);
  align-items:center;
}
.trust-list .logo-chip{
  font-family:var(--font-tech);
  font-weight:600;color:var(--color-text-soft);
  font-size:.8125rem;letter-spacing:.04em;
  padding:var(--space-3) var(--space-3);background:#fff;
  border:1px solid var(--color-line);
  border-left:3px solid var(--color-accent);
  text-align:left;
  position:relative;
  transition:all var(--t);
}
.trust-list .logo-chip:hover{border-left-color:var(--color-primary);transform:translateX(2px)}
.trust-list .logo-chip small{display:block;font-size:.65rem;color:var(--color-text-muted);font-weight:500;margin-top:2px;letter-spacing:.08em}

/* ============================================================
   Spec table
   ============================================================ */
.spec-table{
  width:100%;border-collapse:collapse;
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  overflow:hidden;
  font-size:.9375rem;
}
.spec-table th,.spec-table td{
  padding:10px 18px;text-align:left;line-height:1.4;
  border-bottom:1px solid var(--color-line-soft);
  vertical-align:middle;
}
.spec-table tbody tr{height:46px}
.spec-table th{
  background:var(--color-bg-muted);
  font-family:var(--font-tech);
  font-weight:600;color:var(--color-primary);
  font-size:.8125rem;letter-spacing:.04em;
  text-transform:uppercase;
}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr:hover{background:var(--color-bg-soft)}

/* ============================================================
   Form
   ============================================================ */
.form-grid{display:grid;gap:var(--space-4);grid-template-columns:1fr 1fr}
.form-grid .full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:var(--space-2)}
.field label{font-size:.875rem;font-weight:500;color:var(--color-text)}
.field input,.field select,.field textarea{
  padding:11px 14px;
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  font-family:inherit;font-size:.9375rem;
  background:#fff;transition:border-color var(--t);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--color-primary);
  box-shadow:0 0 0 3px rgba(10,37,64,.08);
}
.field textarea{min-height:120px;resize:vertical}

/* ============================================================
   Footer
   ============================================================ */
.site-footer{
  background:var(--color-iron);
  color:rgba(255,255,255,.7);
  padding:var(--space-8) 0 var(--space-5);
  margin-top:var(--space-9);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background:var(--bg-brushed);opacity:.4;pointer-events:none;
}
.site-footer .container{position:relative}
.site-footer h4{
  color:#fff;margin-bottom:var(--space-4);font-size:.9375rem;
  text-transform:uppercase;letter-spacing:.08em;
  font-family:var(--font-tech);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--space-6);
}
.footer-grid a{color:rgba(255,255,255,.65);font-size:.875rem}
.footer-grid a:hover{color:var(--color-accent)}
.footer-brand{font-size:1.1rem;font-weight:700;color:#fff;margin-bottom:var(--space-3)}
.footer-text{font-size:.875rem;line-height:1.7;color:rgba(255,255,255,.6)}
.footer-chips{display:flex;flex-wrap:wrap;gap:6px;margin:var(--space-3) 0}
.footer-chips a{font-size:.75rem;padding:4px 10px;border:1px solid rgba(255,255,255,.18);border-radius:99px;color:rgba(255,255,255,.78);transition:all .2s}
.footer-chips a:hover{border-color:var(--color-accent);color:var(--color-accent);background:rgba(201,169,97,.08)}
.footer-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--space-2)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:var(--space-7);padding-top:var(--space-4);
  display:flex;justify-content:space-between;align-items:center;
  font-size:.75rem;color:rgba(255,255,255,.4);flex-wrap:wrap;gap:var(--space-3);
  font-family:var(--font-tech);letter-spacing:.04em;
}

/* ============================================================
   Page Header
   ============================================================ */
.page-header{
  background:var(--color-iron);color:#fff;
  padding:var(--space-8) 0 var(--space-7);
  position:relative;overflow:hidden;
}
.page-header::before{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(135deg, rgba(10,21,32,.95) 0%, rgba(10,21,32,.85) 100%),
    var(--bg-brushed);
}
.page-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--color-accent) 50%,transparent);
  opacity:.6;
}
.page-header .container{position:relative}
.page-header h1{color:#fff;margin-bottom:var(--space-3);font-size:clamp(1.9rem,3.8vw,2.8rem)}
.page-header .lead{color:rgba(255,255,255,.85);max-width:780px}
.page-header .eyebrow{color:var(--color-accent-light)}
.breadcrumb{font-size:.8125rem;color:rgba(255,255,255,.55);margin-bottom:var(--space-4);font-family:var(--font-tech);letter-spacing:.04em}
.breadcrumb a{color:rgba(255,255,255,.7)}
.breadcrumb a:hover{color:var(--color-accent)}

/* ============================================================
   ISO Certificate "摆正" — minimal, square, no extra text
   ============================================================ */
.cert-card{
  display:grid;grid-template-columns:1fr 1.4fr;gap:var(--space-7);
  align-items:stretch;
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-md);
  overflow:hidden;
  margin-bottom:var(--space-7);
  position:relative;
}
.cert-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--color-accent),var(--color-accent-dark));
}
.cert-img{
  display:block;background:var(--color-bg-soft);
  padding:var(--space-5);
  border-right:1px solid var(--color-line);
}
.cert-img img{
  width:100%;height:auto;display:block;
  box-shadow:0 8px 24px rgba(0,0,0,.12);
  border:1px solid var(--color-line);
}
.cert-body{padding:var(--space-7) var(--space-6);align-self:center}
.cert-stamp{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-tech);font-size:.6875rem;font-weight:700;
  color:var(--color-accent-dark);letter-spacing:.12em;
  padding:5px 12px;background:rgba(201,169,97,.1);
  border:1px solid rgba(201,169,97,.3);
  border-radius:var(--radius-sm);
  margin-bottom:var(--space-3);
  text-transform:uppercase;
}
.cert-body h3{font-size:1.25rem;color:var(--color-primary);margin-bottom:var(--space-4);font-weight:600}
.cert-grid{
  display:grid;grid-template-columns:auto 1fr;gap:var(--space-2) var(--space-4);
  font-size:.875rem;margin-bottom:var(--space-4);
}
.cert-grid dt{color:var(--color-text-muted);font-weight:500}
.cert-grid dd{margin:0;color:var(--color-text);font-weight:500}

/* ============================================================
   Utility
   ============================================================ */
.bg-soft{background:var(--color-bg-soft)}
.bg-muted{background:var(--color-bg-muted)}
.bg-iron{background:var(--color-iron);color:#fff}
.text-center{text-align:center}
.mt-0{margin-top:0} .mt-3{margin-top:var(--space-3)} .mt-5{margin-top:var(--space-5)} .mt-7{margin-top:var(--space-7)}
.divider{height:1px;background:var(--color-border);margin:var(--space-6) 0}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}
.fade-up{animation:fadeUp 600ms cubic-bezier(.4,0,.2,1) both}
.fade-up-2{animation:fadeUp 600ms cubic-bezier(.4,0,.2,1) 100ms both}
.fade-up-3{animation:fadeUp 600ms cubic-bezier(.4,0,.2,1) 200ms both}
.fade-up-4{animation:fadeUp 600ms cubic-bezier(.4,0,.2,1) 300ms both}

/* ============================================================
   i18n — language visibility
   ============================================================ */
[data-lang]{display:none}
html[lang="zh-CN"] [data-lang="zh"]{display:revert}
html[lang="zh-CN"] [data-lang="en"]{display:none}
html[lang="en"]   [data-lang="en"]{display:revert}
html[lang="en"]   [data-lang="zh"]{display:none}

/* ---- Sales contact: compact one-line list ---- */
.sales-list{list-style:none;padding:0;margin:var(--space-3) 0 0;display:flex;flex-direction:column;gap:6px}
.sales-list li{font-size:.95rem;color:var(--color-text)}
.sales-list li a{color:var(--color-primary);font-weight:600;letter-spacing:.01em}
.sales-list li a:hover{color:var(--color-accent-dark)}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .trust-grid{grid-template-columns:1fr}
}
@media (max-width:860px){
  .hero-inner{grid-template-columns:1fr}
  .hero{min-height:auto;padding:var(--space-7) 0}
  .hero-stats{padding:var(--space-4)}
  .cert-card{grid-template-columns:1fr}
  .cert-img{border-right:0;border-bottom:1px solid var(--color-line)}
  .nav-main{display:none}
  .nav-toggle{display:block}
  .nav-open .nav-main{
    display:flex;flex-direction:column;
    position:absolute;top:74px;left:0;right:0;
    background:#fff;
    border-bottom:1px solid var(--color-line);
    padding:var(--space-4);gap:var(--space-3);align-items:stretch;
  }
  .lang-switch{margin-left:auto}
}
@media (max-width:640px){
  .section{padding:var(--space-7) 0}
  .hero-stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .brand-logo{height:44px;width:auto}
  .site-header .container{height:88px}
}


/* ---------- Compact cards (More Industries) ---------- */
.compact-cards .card-body{padding:var(--space-4)}
.compact-cards .card h3{font-size:1.0625rem;margin-bottom:var(--space-2)}
.compact-cards .card p{font-size:.875rem;margin-bottom:0}

/* ---------- Application grid (4 per row) ---------- */
.app-grid{gap:var(--space-4)}
.app-grid .card-body{padding:var(--space-4)}
.app-grid .card h3{font-size:1.0625rem;margin-bottom:var(--space-2);line-height:1.3}
.app-grid .card p{font-size:.875rem;line-height:1.55;margin-bottom:var(--space-2)}
.app-grid .pill-row{margin-top:var(--space-3);gap:6px}
.app-grid .pill{font-size:.6875rem;padding:4px 8px}

/* ---------- Material tables (Technology page) ---------- */
.material-table{table-layout:fixed;width:100%;font-size:.8125rem}
.material-table th,.material-table td{vertical-align:top;padding:9px 12px;line-height:1.4}
.material-table th{white-space:nowrap;letter-spacing:0;font-size:.75rem;padding:11px 12px}
.material-table th:not(:last-child){border-right:1px solid var(--color-line-soft)}
.material-table td{word-break:keep-all;overflow-wrap:normal}
.material-table td:first-child{white-space:nowrap}
.material-table td:not(:last-child){border-right:1px solid rgba(214,219,226,.55)}
.material-table .col-material{width:28%}
.material-table .col-name{width:24%}
.material-table .col-feature{width:48%}
.material-table.structure-table .col-structure{width:30%}
.material-table.structure-table .col-feature{width:70%}
@media(max-width:860px){
  .material-table .col-material{width:32%}
  .material-table .col-name{width:24%}
  .material-table .col-feature{width:44%}
  .material-table th,.material-table td{padding:7px 8px}
  .material-table th{padding:9px 8px}
  .card-body{padding:var(--space-4)}
}

/* ---------- Factory hero image ---------- */
.factory-hero-img{width:100%;aspect-ratio:16/7;object-fit:cover;object-position:center 35%;display:block}

/* ---------- Product Gallery ---------- */
.product-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  background: var(--color-bg-soft);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  margin: 0 0 var(--space-4) 0;
  border: 1px solid var(--color-line);
}
.product-gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  display: block;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.product-gallery img:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ---------- FAQ accordion ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 880px;
  margin: 0 auto;
}
.faq-item {
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.0625rem;
  position: relative;
  padding-right: 2rem;
  color: var(--color-primary);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 700;
  color: var(--color-accent-dark);
  transition: transform .2s ease;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-a { padding-top: var(--space-4); }
.faq-item .faq-a p {
  color: var(--color-steel);
  line-height: 1.85;
  margin: 0;
}