/* ===========================
   上海拓达联国际贸易有限公司
   官方网站 — 全局样式
   =========================== */

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #333;
  line-height: 1.7;
  background: #fff;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font:inherit;border:none;background:none;touch-action:manipulation}
input,select,textarea{font:inherit;color:inherit;touch-action:manipulation}
a{touch-action:manipulation}

.container{
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Color Tokens ---------- */
:root{
  --navy: #0a1f3f;
  --navy-light: #0d2b56;
  --navy-dark: #06142a;
  --gold: #c9a84c;
  --gold-light: #d9c06e;
  --gold-dark: #a8892e;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-500: #adb5bd;
  --gray-700: #495057;
  --gray-900: #212529;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s ease;
}

/* ---------- Top Bar ---------- */
.top-bar{
  background: var(--navy);
  color: rgba(255,255,255,.75);
  font-size: 13px;
  padding: 6px 0;
}
.top-bar-inner{
  display: flex;
  align-items: center;
  gap: 20px;
}
.top-contact{
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.top-contact svg{flex-shrink:0}
.top-right{margin-left:auto;display:flex;align-items:center;gap:8px}
.top-right a{color:rgba(255,255,255,.75);transition:color var(--transition);cursor:pointer}
.top-right a:hover{color:var(--gold)}
.top-right a.active-lang{color:var(--gold);font-weight:700}
.top-right .sep{opacity:.4;font-size:11px}

/* ---------- Header / Nav ---------- */
.header{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}
.header.scrolled{box-shadow:var(--shadow-md)}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.logo{
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-icon{line-height:0;flex-shrink:0}
.logo-icon img{
  width: 50px;
  height: 50px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 2px 12px rgba(10,31,63,.15);
  transition: box-shadow .3s ease;
}
.logo:hover .logo-icon img{box-shadow:0 4px 18px rgba(201,168,76,.3)}
.logo-text{
  display: flex;
  align-items: baseline;
  line-height: 1;
  gap: 0;
  flex-wrap: wrap;
}
.logo-name{
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 2px;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.logo-sub{
  font-size: 13px;
  font-weight: 500;
  color: var(--gold-dark);
  letter-spacing: 3px;
}
.logo-divider{
  display: inline-block;
  width: 1px;
  height: 15px;
  background: var(--gold);
  margin: 0 10px;
  align-self: center;
}

/* Nav */
.nav-list{
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link{
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: 6px;
  transition: all var(--transition);
  position: relative;
}
.nav-link:hover{color:var(--gold);background:rgba(201,168,76,.06)}
.nav-link.active{color:var(--gold);font-weight:600}
.nav-link.active::after{
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--gold);
  border-radius: 1px;
}

/* Mobile Toggle */
.mobile-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.mobile-toggle span{
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  transition: all var(--transition);
  border-radius: 2px;
}
.mobile-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.mobile-toggle.active span:nth-child(2){opacity:0}
.mobile-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 40%, var(--navy-light) 100%);
  overflow: hidden;
}
.hero-overlay{
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(201,168,76,.08) 0%, transparent 60%);
}
.hero-particles{
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-content{
  position: relative;
  z-index: 1;
  padding: 80px 20px;
  max-width: 1200px;
}
.hero-badge{
  display: inline-block;
  padding: 6px 18px;
  border: 1px solid rgba(201,168,76,.5);
  border-radius: 30px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero-title{
  font-size: 52px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 800px;
}
.gold{color:var(--gold)}
.hero-desc{
  font-size: 17px;
  color: rgba(255,255,255,.7);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 36px;
}
.hero-btns{
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .5px;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-gold{
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(201,168,76,.3);
}
.btn-gold:hover{
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(201,168,76,.4);
}
.btn-outline{
  border: 2px solid rgba(255,255,255,.3);
  color: #fff;
}
.btn-outline:hover{
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201,168,76,.08);
}

/* Hero Stats */
.hero-stats{
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.stat-item{
  text-align: center;
}
.stat-number{
  font-size: 40px;
  font-weight: 800;
  color: var(--gold);
  display: block;
  line-height: 1;
}
.stat-percent{
  font-size: 24px;
  font-weight: 700;
  color: var(--gold);
}
.stat-label{
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,.55);
  margin-top: 6px;
  letter-spacing: .5px;
}
.hero-wave{
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
}
.hero-wave svg{display:block;width:100%;height:60px}

/* ---------- Section Common ---------- */
section{padding: 80px 0}
.section-header{
  text-align: center;
  margin-bottom: 56px;
}
.section-tag{
  display: inline-block;
  padding: 4px 16px;
  background: rgba(201,168,76,.1);
  color: var(--gold-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-title{
  font-size: 36px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}
.section-desc{
  font-size: 16px;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto;
}

/* ---------- Advantages ---------- */
.advantages{background: var(--gray-50)}
.adv-grid{
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}
.adv-card{
  background: #fff;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid transparent;
}
.adv-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(201,168,76,.2);
}
.adv-icon{margin-bottom: 16px;display:inline-block}
.adv-card h3{
  font-size: 18px;
  color: var(--navy);
  margin-bottom: 10px;
  font-weight: 600;
}
.adv-card p{
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ---------- About ---------- */
.about-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image{
  position: relative;
}
.about-img-main{
  width: 100%;
  padding-bottom: 70%;
  background: linear-gradient(135deg, var(--navy), var(--navy-light)), url('../assets/about-image.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-img-main::after{
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(201,168,76,.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(201,168,76,.08) 0%, transparent 50%),
    repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,.02) 10px, rgba(255,255,255,.02) 20px);
}
.about-img-main::before{
  content: '';
  position: absolute;
  top: 20px;left: 20px;right: 20px;bottom: 20px;
  border: 2px solid rgba(201,168,76,.3);
  border-radius: 12px;
  z-index: 1;
}
.about-badge-float{
  position: absolute;
  top: 24px;
  right: -20px;
  background: var(--gold);
  color: #fff;
  padding: 16px 20px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-md);
  z-index: 2;
}
.badge-year{display:block;font-size:28px;font-weight:800;line-height:1}
.badge-text{font-size:12px;opacity:.9}
.about-experience{
  position: absolute;
  bottom: -20px;
  left: 40px;
  background: #fff;
  padding: 20px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  text-align: center;
  z-index: 2;
}
.exp-label{display:block;font-size:12px;color:var(--gray-500);margin-bottom:4px}
.exp-value{display:block;font-size:36px;font-weight:800;color:var(--navy);line-height:1}
.exp-unit{font-size:13px;color:var(--gray-500)}

.about-content .section-tag{display:inline-block}
.about-content .section-title{text-align:left}
.about-lead{
  font-size: 17px;
  color: var(--gray-700);
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-text{
  font-size: 15px;
  color: var(--gray-500);
  margin-bottom: 12px;
  line-height: 1.8;
}
.about-features{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
}
.af-item{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--navy);
  font-weight: 500;
}

/* ---------- Trade ---------- */
.trade{background:#fff}
.trade-grid{
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}
.trade-card{
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition);
}
.trade-card:hover{
  border-color: var(--gold);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.trade-card-icon{margin-bottom: 20px}
.trade-card h3{
  font-size: 18px;
  color: var(--navy);
  margin-bottom: 10px;
  font-weight: 600;
}
.trade-card > p{
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 16px;
  line-height: 1.7;
}
.trade-list{padding-top:12px;border-top:1px solid var(--gray-100)}
.trade-list li{
  padding: 5px 0;
  font-size: 13px;
  color: var(--gray-700);
  padding-left: 16px;
  position: relative;
}
.trade-list li::before{
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- Supply Chain ---------- */
.supplychain{background:var(--gray-50)}
.sc-flow-container{overflow-x:auto;padding-bottom:20px;margin-bottom:48px}
.sc-flow{
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 800px;
  justify-content: center;
}
.sc-node{
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  padding: 24px 20px;
  border-radius: var(--radius-lg);
  text-align: center;
  flex: 0 0 160px;
  transition: all var(--transition);
}
.sc-node:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.sc-node-icon{margin-bottom:12px}
.sc-node h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:6px}
.sc-node p{color:rgba(255,255,255,.6);font-size:12px}
.sc-arrow{
  font-size: 28px;
  color: var(--gold);
  font-weight: 700;
  flex-shrink: 0;
}

.sc-grid{
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}
.sc-card{
  background: #fff;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}
.sc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.sc-card h3{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  color: var(--navy);
  margin-bottom: 12px;
  font-weight: 600;
}
.sc-card p{
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ---------- Products ---------- */
.products{background:#fff}
.product-grid{
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.product-card{
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.product-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(201,168,76,.3);
}
.product-img{
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-info{padding: 20px}
.product-info h4{
  font-size: 17px;
  color: var(--navy);
  margin-bottom: 8px;
  font-weight: 600;
}
.product-info p{
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ---------- Partners ---------- */
.partners{background:var(--gray-50)}
.partner-grid{
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}
.partner-card{
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  transition: all var(--transition);
  cursor: default;
}
.partner-card:hover{
  border-color: var(--gold);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.partner-card h4{
  font-size: 16px;
  color: var(--navy);
  letter-spacing: 4px;
  margin-bottom: 8px;
  font-weight: 600;
}
.partner-card p{
  font-size: 13px;
  color: var(--gray-500);
}

/* ---------- News ---------- */
.news{background:#fff}
.news-grid{
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.news-card{
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  gap: 20px;
  transition: all var(--transition);
}
.news-card:hover{
  box-shadow: var(--shadow-md);
  border-color: rgba(201,168,76,.3);
}
.news-date{
  text-align: center;
  flex-shrink: 0;
  width: 56px;
}
.news-day{
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}
.news-month{
  display: block;
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 4px;
}
.news-cat{
  display: inline-block;
  padding: 2px 10px;
  background: rgba(201,168,76,.12);
  color: var(--gold-dark);
  font-size: 11px;
  border-radius: 10px;
  font-weight: 600;
  margin-bottom: 8px;
}
.news-content h4{
  font-size: 16px;
  color: var(--navy);
  margin-bottom: 8px;
  font-weight: 600;
  line-height: 1.5;
}
.news-content p{
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 12px;
}
.news-link{
  font-size: 13px;
  color: var(--gold);
  font-weight: 600;
  transition: color var(--transition);
}
.news-link:hover{color:var(--gold-dark)}

/* ---------- Contact ---------- */
.contact{background:var(--gray-50)}
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-item{
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.contact-icon{
  width: 48px;
  height: 48px;
  background: rgba(201,168,76,.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-item h4{
  font-size: 14px;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 4px;
}
.contact-item p{
  font-size: 15px;
  color: var(--navy);
  font-weight: 500;
}

.contact-form-wrap{
  background: #fff;
  padding: 36px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
}
.form-row{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-group{margin-bottom:16px}
.form-group label{
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea{
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--gray-50);
  transition: all var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus{
  border-color: var(--gold);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(201,168,76,.1);
}
.form-group textarea{resize:vertical;min-height:100px}
.btn-submit{
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 16px;
  margin-top: 8px;
}
.btn-submit:hover svg{transform:translateX(4px)}
.btn-submit svg{transition:transform var(--transition)}

/* ---------- Footer ---------- */
.footer{
  background: var(--navy-dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-grid{
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand h3{
  font-size: 18px;
  color: #fff;
  margin-bottom: 4px;
}
.footer-brand > p{
  font-size: 12px;
  color: var(--gold);
  margin-bottom: 12px;
  letter-spacing: .5px;
}
.footer-desc{
  font-size: 13px;
  line-height: 1.8;
}
.footer-links h4,
.footer-contact h4{
  font-size: 15px;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-links ul{display:flex;flex-direction:column;gap:8px}
.footer-links a{
  font-size: 13px;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-links a:hover{color:var(--gold)}
.footer-contact p{
  font-size: 13px;
  margin-bottom: 8px;
  line-height: 1.6;
}
.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 12px;
  color: rgba(255,255,255,.4);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a{color:rgba(255,255,255,.4);transition:color var(--transition)}
.footer-bottom a:hover{color:var(--gold)}
.footer-bottom .sep{margin:0 8px;opacity:.3}

/* ---------- Back to Top ---------- */
.back-to-top{
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--navy);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 999;
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--gold);transform:translateY(-3px)}

/* ---------- Animations ---------- */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(30px)}
  to{opacity:1;transform:translateY(0)}
}
.animate{
  animation: fadeUp .6s ease forwards;
}

/* ---------- Particle ---------- */
.hero-particle{
  position: absolute;
  border-radius: 50%;
  background: rgba(201,168,76,.15);
  animation: float 6s infinite ease-in-out;
}
@keyframes float{
  0%,100%{transform:translateY(0) scale(1);opacity:.3}
  50%{transform:translateY(-20px) scale(1.2);opacity:.6}
}

/* ---------- Toast ---------- */
.toast{
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 14px;
  z-index: 10000;
  box-shadow: var(--shadow-lg);
  animation: toastIn .4s ease, toastOut .4s ease 2.8s forwards;
}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(-20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(-50%) translateY(0)}to{opacity:0;transform:translateX(-50%) translateY(-20px)}}

/* ==================== Mobile-First Responsive ==================== */

/* ---------- Tablet (<=1024px) ---------- */
@media(max-width:1024px){
  .hero-title{font-size:38px}
  .adv-grid,.trade-grid,.sc-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .partner-grid{grid-template-columns:repeat(2,1fr)}
}

/* ---------- Phone (<=768px) — Primary Mobile Breakpoint ---------- */
@media(max-width:768px){
  /* Top Bar */
  .top-bar{display:block;padding:8px 0;font-size:12px}
  .top-bar-inner{justify-content:center;gap:10px}
  .top-contact:nth-child(2){display:none}
  .top-right{display:none}

  /* Header */
  .header-inner{height:60px}
  .logo-icon img{width:40px;height:40px;border-radius:10px}
  .logo-name{font-size:16px;letter-spacing:1px}
  .logo-sub{font-size:11px;letter-spacing:1px}
  .logo-divider{margin:0 5px;height:10px}

  /* Mobile Menu */
  .mobile-toggle{display:flex}
  .nav{
    position: fixed;
    top: 60px;left: 0;right: 0;bottom: 0;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(10px);
    padding: 12px 16px;
    flex-direction: column;
    align-items: flex-start;
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav.open{transform:translateX(0)}
  .nav-list{flex-direction:column;gap:2px;width:100%}
  .nav-link{padding:16px 16px;font-size:16px;width:100%;border-bottom:1px solid var(--gray-100)}
  .nav-link.active::after{bottom:14px}

  /* Sections */
  section{padding:48px 0}
  .container{padding:0 16px}
  .section-header{margin-bottom:36px}
  .section-title{font-size:24px}
  .section-desc{font-size:14px;padding:0 8px}

  /* Hero */
  .hero{min-height:auto}
  .hero-content{padding:48px 16px}
  .hero-badge{font-size:12px;padding:5px 14px;margin-bottom:16px}
  .hero-title{font-size:26px;line-height:1.35;margin-bottom:14px}
  .hero-desc{font-size:14px;line-height:1.7;margin-bottom:24px}
  .hero-btns{flex-direction:column;gap:10px;margin-bottom:36px}
  .btn{width:100%;justify-content:center;padding:14px 24px;font-size:15px}
  .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:100%}
  .stat-item{text-align:center}
  .hero-stats .stat-number{font-size:22px}
  .stat-label{font-size:11px}

  /* Grid Cards — Single Column */
  .adv-grid,.trade-grid,.sc-grid{grid-template-columns:1fr;gap:14px}
  .product-grid{grid-template-columns:1fr;gap:14px}
  .partner-grid{grid-template-columns:1fr 1fr;gap:12px}
  .news-grid{grid-template-columns:1fr;gap:14px}

  /* Advantage Cards */
  .adv-card{padding:28px 20px}
  .adv-card h3{font-size:17px}
  .adv-card p{font-size:14px}

  /* About */
  .about-grid{grid-template-columns:1fr;gap:32px}
  .about-image{margin-top:10px}
  .about-img-main{padding-bottom:60%}
  .about-badge-float{right:0;top:-12px;padding:10px 14px;border-radius:8px}
  .badge-year{font-size:20px}
  .about-experience{left:12px;bottom:-14px;padding:14px 18px;border-radius:8px}
  .exp-value{font-size:26px}
  .about-content .section-title{text-align:center;font-size:22px}
  .about-content .section-tag{display:table;margin:0 auto 8px}
  .about-lead{font-size:15px;text-align:center}
  .about-text{font-size:14px;text-align:justify}
  .about-features{grid-template-columns:1fr;gap:8px;margin-top:20px}

  /* Supply Chain Flow — Vertical Stack on Mobile */
  .sc-flow-container{overflow-x:visible;padding-bottom:0;margin-bottom:36px}
  .sc-flow{flex-direction:column;gap:0;min-width:auto;padding:0}
  .sc-node{flex:auto;width:100%;max-width:280px;margin:0 auto;padding:20px 16px}
  .sc-arrow{transform:rotate(90deg);font-size:22px;text-align:center}

  /* Supply Chain Cards */
  .sc-card{padding:24px 20px}
  .sc-card h3{font-size:15px}
  .sc-card p{font-size:14px}

  /* Trade Cards */
  .trade-card{padding:28px 20px}
  .trade-card h3{font-size:17px}
  .trade-card > p{font-size:14px}

  /* Product Cards */
  .product-card{border-radius:12px}
  .product-img{height:130px}
  .product-info{padding:16px}
  .product-info h4{font-size:16px}

  /* Partner Cards */
  .partner-card{padding:28px 12px}
  .partner-card h4{font-size:14px;letter-spacing:2px}

  /* News */
  .news-card{padding:20px;gap:16px}
  .news-content h4{font-size:15px}

  /* Contact */
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .contact-info{flex-direction:column;gap:16px}
  .contact-item{gap:12px}
  .contact-icon{width:44px;height:44px;border-radius:10px}
  .contact-item h4{font-size:13px}
  .contact-item p{font-size:15px}
  .contact-form-wrap{padding:20px 16px;border-radius:12px}
  .form-row{grid-template-columns:1fr;gap:0}
  .form-group{margin-bottom:14px}
  .form-group label{font-size:13px;margin-bottom:4px}
  .form-group input,
  .form-group select,
  .form-group textarea{padding:13px 14px;font-size:16px;border-radius:8px}
  .btn-submit{padding:15px;font-size:16px;margin-top:4px}

  /* Footer */
  .footer{padding:40px 0 0}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;text-align:center;gap:8px}

  /* Back to Top */
  .back-to-top{bottom:80px;right:16px;width:40px;height:40px}

  /* Mobile Bottom Bar */
  .mobile-call-bar{display:flex}
  body{padding-bottom:68px}
  .footer{padding-bottom:16px}
}

/* ---------- Small Phone (<=400px) ---------- */
@media(max-width:400px){
  .hero-title{font-size:22px}
  .hero-badge{font-size:11px;padding:4px 12px}
  .hero-stats{gap:8px}
  .hero-stats .stat-number{font-size:20px}
  .hero-btns{gap:8px}
  .hero .btn{padding:12px 18px;font-size:14px}
  .partner-grid{grid-template-columns:1fr}
  .section-title{font-size:22px}
  .adv-card{padding:22px 16px}
  .adv-card h3{font-size:16px}
  .trade-card{padding:24px 16px}
  .trade-card h3{font-size:16px}
  .product-img{height:110px}
  .news-card{flex-direction:column;gap:10px;padding:18px}
  .news-date{width:auto;display:flex;align-items:baseline;gap:6px}
  .contact-form-wrap{padding:16px 14px}
  .mobile-call-bar{padding:8px 10px}
  .mobile-call-bar a{font-size:14px;padding:10px 0}
  body{padding-bottom:64px}
}

/* Mobile sticky call bar */
.mobile-call-bar{
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--navy);
  padding: 10px 16px;
  z-index: 999;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 -4px 20px rgba(0,0,0,.2);
  -webkit-backdrop-filter: blur(10px);
}
.mobile-call-bar a{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  flex: 1;
  padding: 12px 0;
  border-radius: 8px;
  transition: all .3s ease;
}
.mobile-call-bar a:first-child{background:linear-gradient(135deg, var(--gold), var(--gold-dark))}
.mobile-call-bar a:first-child:active{transform:scale(.97);opacity:.9}
.mobile-call-bar a:last-child{background:rgba(255,255,255,.1)}
.mobile-call-bar a:last-child:active{background:rgba(255,255,255,.2)}