/* ============================================
   拓水智控 v2 — 高端精品风
   Premium · Refined · Modern Minimal
   ============================================ */

/* === Variables === */
:root {
  --primary: #0a7eff;
  --primary-dark: #0055cc;
  --primary-light: #4d9dff;
  --primary-glow: rgba(10, 126, 255, 0.30);
  --primary-dim: rgba(10, 126, 255, 0.09);
  --primary-mid: rgba(10, 126, 255, 0.05);

  --bg: #f9fafc;
  --bg-alt: #f0f2f6;
  --bg-card: #ffffff;
  --bg-dark: #0b1120;
  --bg-dark-alt: #111827;
  --bg-dark-card: #151f2e;

  --border: #e8ecf2;
  --border-light: rgba(10,126,255,0.2);

  --text: #1e293b;
  --text-dim: #546577;
  --text-muted: #94a3b8;
  --text-bright: #0f172a;
  --text-dark: #f1f5f9;
  --text-dark-dim: #94a3b8;
  --text-dark-muted: #64748b;

  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --shadow: 0 1px 4px rgba(0,0,0,0.04), 0 4px 24px rgba(0,0,0,0.03);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.03);
  --transition: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  --section-padding: 110px 0;
}

/* === Reset === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
::selection{background:var(--primary-dim);color:var(--primary)}

/* === Container === */
.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* === Section === */
.section{padding:var(--section-padding);position:relative}
.section-alt{background:var(--bg-alt)}
.section-heading{
  text-align:center;
  margin-bottom:64px;
}
.section-heading .tag{
  display:inline-block;
  padding:5px 18px;
  border-radius:20px;
  background:var(--primary-dim);
  color:var(--primary);
  font-size:0.78rem;
  font-weight:600;
  letter-spacing:1.5px;
  text-transform:uppercase;
  margin-bottom:16px;
}
.section-heading h2{
  font-size:2.4rem;
  font-weight:700;
  color:var(--text-bright);
  margin-bottom:14px;
  line-height:1.2;
  letter-spacing:-0.3px;
}
.section-heading p{
  font-size:1.05rem;
  color:var(--text-dim);
  max-width:560px;
  margin:0 auto;
  line-height:1.8;
}

/* === Animations === */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(28px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes fadeIn{
  from{opacity:0}
  to{opacity:1}
}
.fade-in{opacity:0;transform:translateY(28px);transition:opacity 0.7s ease,transform 0.7s ease}
.fade-in.lg{transform:translateY(48px)}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === Header === */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,0.88);
  backdrop-filter:blur(24px) saturate(180%);
  -webkit-backdrop-filter:blur(24px) saturate(180%);
  border-bottom:1px solid var(--border);
  transition:all 0.35s ease;
}
.header.scrolled{
  box-shadow:0 1px 12px rgba(0,0,0,0.05);
  background:rgba(255,255,255,0.96);
}
.header-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 32px;height:76px;
}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-img{width:42px;height:42px;object-fit:contain}
.logo-text .cn{font-size:1.25rem;font-weight:700;color:var(--text-bright);letter-spacing:2px}
.logo-text .en{font-size:0.5rem;color:var(--text-muted);letter-spacing:1.5px;text-transform:uppercase;margin-top:-2px;display:block}

.nav{display:flex;align-items:center;gap:2px}
.nav a{
  padding:8px 20px;border-radius:8px;
  color:var(--text-dim);font-size:0.88rem;font-weight:500;
  transition:var(--transition);position:relative;
}
.nav a::after{
  content:'';position:absolute;bottom:3px;left:50%;transform:translateX(-50%);
  width:0;height:2px;border-radius:1px;
  background:var(--primary);transition:var(--transition);
}
.nav a:hover::after,.nav a.active::after{width:22px}
.nav a:hover,.nav a.active{color:var(--primary)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.hamburger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* === Hero (Light Premium) === */
.hero{
  min-height:88vh;display:flex;align-items:center;
  position:relative;overflow:hidden;padding-top:76px;
  background:linear-gradient(160deg, #eef3fa 0%, #e6edf7 30%, #f5f7fc 60%, #fafbff 100%);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 70% 50% at 0% 80%, rgba(10,126,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 100% 10%, rgba(99,102,241,0.05) 0%, transparent 50%);
  pointer-events:none;
}
.hero-content{
  position:relative;z-index:2;
  max-width:750px;margin:0 auto;
  padding:0 32px;text-align:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 18px 6px 10px;
  border-radius:20px;
  background:rgba(10,126,255,0.08);
  border:1px solid rgba(10,126,255,0.18);
  color:var(--primary);
  font-size:0.78rem;font-weight:600;
  margin-bottom:30px;
  animation:fadeUp 0.6s ease 0.2s both;
}
.hero-badge .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--primary);
  opacity:0.7;
}
.hero-content h1{
  font-size:3.4rem;font-weight:700;line-height:1.15;
  color:var(--text-bright);
  margin-bottom:20px;
  letter-spacing:-0.5px;
  animation:fadeUp 0.6s ease 0.3s both;
}
.hero-content h1 span{
  background:linear-gradient(135deg, var(--primary), #6366f1);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-content p{
  font-size:1.1rem;
  color:var(--text-dim);
  max-width:600px;margin:0 auto 40px;
  line-height:1.85;
  animation:fadeUp 0.6s ease 0.4s both;
}
.hero-buttons{
  display:flex;gap:14px;flex-wrap:wrap;justify-content:center;
  animation:fadeUp 0.6s ease 0.5s both;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 34px;border-radius:10px;
  font-size:0.92rem;font-weight:600;
  cursor:pointer;border:none;
  transition:var(--transition);white-space:nowrap;
  letter-spacing:0.3px;
}
.btn-primary{
  background:var(--primary);color:#fff;
  box-shadow:0 4px 20px var(--primary-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px var(--primary-glow);color:#fff}
.btn-outline{
  background:transparent;
  border:1.5px solid var(--border);
  color:var(--text);
}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-secondary{background:var(--primary-dark);color:#fff}
.btn-secondary:hover{transform:translateY(-2px);color:#fff}

.hero-stats{
  display:flex;gap:48px;justify-content:center;margin-top:52px;
  padding-top:28px;border-top:1px solid var(--border);
  animation:fadeUp 0.6s ease 0.6s both;
}
.hero-stat{text-align:center;}
.hero-stat .num{
  font-size:2rem;font-weight:700;color:var(--primary);line-height:1.1;
  letter-spacing:-0.5px;
}
.hero-stat .label{
  font-size:0.82rem;color:var(--text-dim);margin-top:4px;
  font-weight:500;
}

/* === Feature Cards (Light Premium) === */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(320px, 1fr));
  gap:28px;
}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:44px 36px;
  transition:var(--transition);
  cursor:default;
  position:relative;
  overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg, var(--primary), #6366f1, var(--primary));
  opacity:0;
  transition:var(--transition);
}
.feature-card:hover::before{opacity:1}
.feature-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:transparent;
}
.feature-card .icon{
  width:56px;height:56px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;color:var(--primary);
  background:var(--primary-dim);
  border-radius:14px;
  margin-bottom:22px;
  transition:var(--transition);
}
.feature-card:hover .icon{
  background:var(--primary);
  color:#fff;
  transform:scale(1.05) rotate(-3deg);
}
.feature-card h3{
  font-size:1.15rem;
  font-weight:700;
  color:var(--text-bright);
  margin-bottom:10px;
  letter-spacing:-0.2px;
}
.feature-card p{
  font-size:0.88rem;
  color:var(--text-dim);
  line-height:1.7;
}

/* === Product Cards === */
.product-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:22px;
}
.product-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:var(--transition);
  cursor:pointer;
}
.product-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:transparent;
}
.card-img{
  height:200px;
  background-size:cover;
  background-position:center;
  background-color:var(--bg-alt);
  position:relative;
  overflow:hidden;
}
.card-img::after{
  content:'';position:absolute;bottom:0;left:0;right:0;
  height:60px;
  background:linear-gradient(transparent, var(--bg-card));
}
.card-body{padding:22px 26px 26px}
.card-body h3{
  font-size:0.95rem;
  font-weight:600;
  color:var(--text-bright);
  margin-bottom:6px;
  line-height:1.4;
}
.card-body p{
  font-size:0.83rem;
  color:var(--text-dim);
  line-height:1.65;
}

/* === Cat Tabs === */
.cat-tabs{
  display:flex;
  gap:10px;
  justify-content:center;
  margin-bottom:40px;
  flex-wrap:wrap;
}
.cat-tab{
  padding:10px 26px;
  border-radius:10px;
  background:var(--bg-card);
  border:1.5px solid var(--border);
  color:var(--text-dim);
  font-size:0.88rem;
  font-weight:500;
  cursor:pointer;
  transition:var(--transition);
}
.cat-tab:hover{border-color:var(--primary);color:var(--primary)}
.cat-tab.active{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
  box-shadow:0 4px 16px var(--primary-glow);
}
.cat-content{display:none}
.cat-content.active{display:block;animation:fadeUp 0.45s ease}

/* === Stats / Numbers === */
.stats-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));
  gap:24px;
}
.stat-card{
  text-align:center;
  padding:40px 24px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:var(--transition);
}
.stat-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--primary-dim);
}
.stat-card .num{
  font-size:2.8rem;
  font-weight:700;
  color:var(--primary);
  margin-bottom:6px;
  line-height:1.1;
  letter-spacing:-1px;
}
.stat-card .label{
  font-size:0.9rem;
  color:var(--text-dim);
  font-weight:500;
}

/* === Service Flow / Steps === */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(240px, 1fr));
  gap:24px;
}
.step-card{
  text-align:center;
  padding:40px 28px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:var(--transition);
}
.step-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.step-num{
  width:44px;height:44px;line-height:44px;text-align:center;
  border-radius:50%;
  background:linear-gradient(135deg, var(--primary), #6366f1);color:#fff;
  font-weight:700;font-size:1.1rem;
  margin:0 auto 18px;
}
.step-card h4{
  font-size:0.95rem;
  color:var(--text-bright);font-weight:600;
  margin-bottom:8px;
}
.step-card p{
  font-size:0.85rem;
  color:var(--text-dim);line-height:1.65;
}

/* === Solution Detail Cards === */
.solution-detail-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:44px 36px;
  margin-bottom:24px;
  transition:var(--transition);
}
.solution-detail-card:hover{
  box-shadow:var(--shadow-hover);
  border-color:var(--primary-dim);
}
.solution-detail-card h3{
  font-size:1.2rem;
  font-weight:700;
  color:var(--text-bright);
  margin-bottom:12px;
  display:flex;align-items:center;gap:10px;
}
.solution-detail-card h3 i{color:var(--primary)}
.solution-detail-card p{color:var(--text-dim);font-size:0.9rem;line-height:1.75;margin-bottom:16px}
.solution-detail-card ul{list-style:none;padding:0}
.solution-detail-card ul li{
  padding:6px 0;
  color:var(--text-dim);
  font-size:0.85rem;
  display:flex;align-items:center;gap:8px;
}
.solution-detail-card ul li i{color:var(--primary);font-size:0.75rem}

/* === Tech Tags === */
.tech-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tech-tag{
  padding:4px 14px;border-radius:6px;
  background:var(--primary-dim);
  color:var(--primary);
  font-size:0.75rem;font-weight:500;
}

/* === Grid Helpers === */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
@media(max-width:960px){
  .grid-3,.grid-2{grid-template-columns:1fr}
}

/* === Contact === */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
}
.contact-card-group{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.contact-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px 24px;
  text-align:center;
  transition:var(--transition);
}
.contact-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);
  border-color:var(--primary-dim);
}
.contact-card .icon{
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;color:var(--primary);
  background:var(--primary-dim);
  border-radius:14px;
  margin:0 auto 14px;
}
.contact-card h4{
  font-size:0.85rem;
  color:var(--text-dim);
  margin-bottom:4px;
  font-weight:500;
}
.contact-card p{
  font-size:0.92rem;
  color:var(--text-bright);
  font-weight:600;
}
.contact-card p a{color:var(--text-bright)}
.contact-card p a:hover{color:var(--primary)}

/* === About Section === */
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.about-text h2{
  font-size:2.2rem;
  font-weight:700;
  color:var(--text-bright);
  margin-bottom:20px;
  letter-spacing:-0.3px;
}
.about-text p{
  color:var(--text-dim);
  margin-bottom:16px;
  line-height:1.85;
  font-size:0.95rem;
}
.about-image{
  border-radius:var(--radius-lg);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--bg-alt);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.about-image img{width:100%;height:100%;object-fit:cover}

/* === Page Banner === */
.page-banner{
  padding:150px 0 90px;
  text-align:center;
  background:linear-gradient(160deg, #eef3fa, #e6edf7 50%, #f5f7fc);
  position:relative;
  overflow:hidden;
}
.page-banner::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 50%, rgba(10,126,255,0.06) 0%, transparent 60%);
  pointer-events:none;
}
.page-banner h1{
  font-size:2.6rem;
  font-weight:700;
  color:var(--text-bright);
  margin-bottom:10px;
  position:relative;z-index:1;
  letter-spacing:-0.5px;
}
.page-banner p{
  font-size:1.05rem;
  color:var(--text-dim);
  position:relative;z-index:1;
}

/* === Footer (Dark Contrast) === */
.footer{
  background:var(--bg-dark);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
  margin-bottom:40px;
}
.footer-brand-desc{
  color:rgba(255,255,255,0.4);
  font-size:0.88rem;
  line-height:1.75;
  margin-top:16px;
}
.footer h4{
  color:rgba(255,255,255,0.8);
  font-size:0.85rem;
  font-weight:600;
  margin-bottom:18px;
  letter-spacing:0.5px;
  text-transform:uppercase;
}
.footer a{
  display:block;
  color:rgba(255,255,255,0.35);
  font-size:0.84rem;
  margin-bottom:10px;
  transition:var(--transition);
}
.footer a:hover{color:var(--primary-light);padding-left:4px}
.footer .contact-links a{
  display:flex;
  align-items:center;
  gap:8px;
}
.footer .contact-links a i{width:14px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.06);
  padding-top:24px;
  text-align:center;
  color:rgba(255,255,255,0.2);
  font-size:0.78rem;
}
.footer-bottom a{
  display:inline;
  color:rgba(255,255,255,0.25);
  font-size:0.78rem;
}
.footer-bottom a:hover{color:var(--primary-light);padding-left:0}

/* === Timeline === */
.timeline{position:relative;padding-left:40px}
.timeline::before{
  content:'';position:absolute;left:14px;top:0;bottom:0;
  width:2px;
  background:linear-gradient(180deg, var(--primary), var(--primary-dim));
}
.timeline-item{position:relative;padding-bottom:40px;padding-left:36px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:'';position:absolute;left:-26px;top:6px;
  width:12px;height:12px;
  background:var(--primary);
  border-radius:50%;
  border:3px solid var(--bg);
  box-shadow:0 0 0 3px var(--primary-dim);
}
.timeline-item .year{
  font-size:1.1rem;font-weight:600;color:var(--primary);margin-bottom:4px;
}
.timeline-item h4{
  font-size:0.95rem;color:var(--text-bright);margin-bottom:4px;font-weight:600;
}
.timeline-item p{
  font-size:0.88rem;color:var(--text-dim);line-height:1.7;
}

/* === FAQ === */
.faq-item{
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:10px;
  overflow:hidden;
  transition:var(--transition);
}
.faq-q{
  padding:18px 22px;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  color:var(--text-bright);
  font-weight:500;
  font-size:0.92rem;
  transition:var(--transition);
  user-select:none;
}
.faq-q:hover{background:var(--primary-mid)}
.faq-q .arrow{
  font-size:0.7rem;
  transition:var(--transition);
  color:var(--text-muted);
}
.faq-item.active .faq-q .arrow{transform:rotate(180deg);color:var(--primary)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.35s ease,padding 0.35s ease;
}
.faq-item.active .faq-a{
  max-height:300px;
  padding:0 22px 18px;
  color:var(--text-dim);
  font-size:0.88rem;
  line-height:1.7;
  border-top:1px solid var(--border);
}

/* === Back to Top === */
#back-to-top{
  position:fixed;bottom:30px;right:30px;z-index:999;
  width:44px;height:44px;border-radius:14px;
  background:var(--bg-card);border:1px solid var(--border);
  color:var(--text-dim);font-size:1rem;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:var(--transition);
  opacity:0;visibility:hidden;
  box-shadow:var(--shadow);
}
#back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
#back-to-top:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px)}

/* === Marquee === */
.marquee-wrap{overflow:hidden;position:relative;mask-image:linear-gradient(90deg, transparent, #fff 5%, #fff 95%, transparent);-webkit-mask-image:linear-gradient(90deg, transparent, #fff 5%, #fff 95%, transparent)}
.marquee-track{display:flex;gap:40px;animation:marquee 25s linear infinite;width:max-content}
.marquee-item{display:flex;align-items:center;justify-content:center;padding:16px 32px;white-space:nowrap;font-size:0.9rem;color:var(--text-dim);font-weight:500;gap:8px}
.marquee-item i{font-size:1.3rem;color:var(--primary)}
@keyframes marquee{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* === Responsive === */
@media(max-width:960px){
  .hero-content h1{font-size:2.4rem}
  .hero-stats{flex-wrap:wrap;gap:28px}
  .section-heading h2{font-size:2rem}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:36px}
  .contact-card-group{grid-template-columns:1fr 1fr}
  .product-grid{grid-template-columns:repeat(auto-fill, minmax(260px,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav{
    position:fixed;top:76px;left:0;right:0;bottom:0;
    background:rgba(255,255,255,0.97);
    backdrop-filter:blur(20px);
    flex-direction:column;padding:32px 24px;
    transform:translateX(100%);transition:var(--transition);
  }
  .nav.open{transform:translateX(0)}
  .nav a{font-size:1.05rem;padding:14px 0}
  .nav a::after{display:none}
  .hero{min-height:80vh}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:0.95rem}
  .section{padding:70px 0}
  .section-heading{margin-bottom:40px}
  .section-heading h2{font-size:1.6rem}
  .page-banner{padding:110px 0 60px}
  .page-banner h1{font-size:1.8rem}
  .hero-stats{flex-wrap:wrap;gap:20px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .hamburger{display:flex}
  .about-image{min-height:200px}
  .btn{width:100%;justify-content:center;text-align:center}
  .hero-buttons{flex-direction:column;align-items:stretch}
  .contact-card-group{grid-template-columns:1fr}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr}
  .hero-content h1{font-size:1.5rem}
  .hero-stats{flex-direction:column;gap:14px}
  .hero-stat{display:flex;align-items:center;gap:12px}
  .hero-stat .num{font-size:1.5rem}
}