:root{--primary:#0ea5e9;--primary-dark:#1e40af;--primary-light:#e0f2fe;--accent:#25D366;--text:#1f2937;--muted:#6b7280;--bg:#f9fafb;--white:#ffffff;--border:#e5e7eb;--shadow:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 10px 30px rgba(0,0,0,0.12)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden;font-size:16px}body[dir="rtl"]{direction:rtl;text-align:right}h1,h2,h3,h4,h5,h6{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-weight:700;line-height:1.3;color:var(--primary-dark)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.4rem}p{margin-bottom:1rem}a{text-decoration:none;color:var(--primary);transition:all 0.2s}a:hover{color:var(--primary-dark)}img{max-width:100%;height:auto;display:block}.container{max-width:1280px;margin:0 auto;padding:0 24px}.topbar{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:white;font-size:0.85rem;padding:10px 0;text-align:center}.topbar-row{display:flex;justify-content:center;align-items:center;gap:20px;flex-wrap:wrap}.header{background:var(--white);box-shadow:var(--shadow);padding:16px 0;position:sticky;top:0;z-index:1000;border-bottom:1px solid var(--border)}.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.logo-img{height:64px;width:64px;object-fit:contain;border-radius:0}.brand-name{font-size:1.4rem;font-weight:700;color:var(--primary-dark);white-space:nowrap;background:linear-gradient(135deg,var(--primary-dark),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav{display:flex;gap:28px;align-items:center}.nav-link{font-weight:600;font-size:0.95rem;color:var(--text);padding:8px 0;border-bottom:2px solid transparent;transition:all 0.2s}.nav-link:hover,.nav-link.active{color:var(--primary);border-bottom-color:var(--primary)}.header-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.cta-wa{background:var(--accent);color:white !important;padding:10px 18px;border-radius:8px;font-weight:600;font-size:0.9rem;white-space:nowrap;transition:all 0.2s;display:inline-flex;align-items:center;gap:6px}.cta-wa:hover{background:#1da856;color:white !important;transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,211,102,0.4)}.lang-switcher{position:relative}.lang-btn{background:var(--white);border:2px solid var(--primary);padding:8px 14px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:6px;font-family:inherit;font-size:0.9rem;color:var(--primary);font-weight:600;transition:all 0.2s}.lang-btn:hover{background:var(--primary-light)}.lang-menu{display:none;position:absolute;top:calc(100% + 8px);right:0;background:var(--white);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-lg);min-width:220px;max-height:400px;overflow-y:auto;z-index:100;padding:8px}.lang-menu.open{display:block}.lang-option{display:block;padding:10px 16px;color:var(--text);font-size:0.9rem;border-radius:6px;transition:all 0.15s}.lang-option:hover{background:var(--primary-light);color:var(--primary-dark)}.lang-option.active{background:var(--primary);color:white !important;font-weight:600}.mobile-menu-toggle{display:none;font-size:1.6rem;cursor:pointer;color:var(--primary-dark);background:none;border:none;padding:4px 8px}.hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 100%);color:white;padding:80px 20px;text-align:center;position:relative;overflow:hidden}.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 30% 50%,rgba(255,255,255,0.1) 0%,transparent 50%)}.hero-eyebrow{text-transform:uppercase;letter-spacing:3px;font-size:0.85rem;color:rgba(255,255,255,0.9);margin-bottom:16px;font-weight:600;position:relative}.hero h1{font-size:3rem;margin-bottom:20px;line-height:1.2;color:white;position:relative;text-shadow:0 2px 12px rgba(0,0,0,0.2)}.hero-desc{font-size:1.15rem;max-width:800px;margin:0 auto 36px;opacity:0.95;position:relative}.section{padding:80px 0}.section-cream{background:var(--white)}.section-light{background:var(--bg)}.section-head{text-align:center;margin-bottom:50px}.section-head h2{margin-bottom:12px;color:var(--primary-dark)}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:0.8rem;color:var(--primary);font-weight:700;margin-bottom:8px;display:block}.btn{display:inline-block;padding:12px 28px;background:var(--primary);color:white !important;border-radius:8px;font-weight:600;font-size:0.95rem;border:none;cursor:pointer;transition:all 0.2s;text-align:center}.btn:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(14,165,233,0.4)}.btn-gold{background:var(--white);color:var(--primary-dark) !important;border:2px solid var(--primary)}.btn-gold:hover{background:var(--primary-light)}.btn-submit{background:var(--primary);color:white;border:none;padding:14px 36px;border-radius:8px;font-weight:600;cursor:pointer;font-size:1rem;transition:all 0.2s}.btn-submit:hover{background:var(--primary-dark)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.product-card{background:var(--white);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:all 0.3s;display:flex;flex-direction:column}.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.product-img-wrap{display:block;height:240px;background:var(--bg);overflow:hidden;position:relative}.product-img-wrap img{width:100%;height:100%;object-fit:contain;padding:16px;transition:transform 0.3s}.product-card:hover .product-img-wrap img{transform:scale(1.05)}.product-cat-badge{position:absolute;top:12px;left:12px;background:var(--primary);color:white;padding:6px 12px;border-radius:6px;font-size:0.75rem;font-weight:600;z-index:1}.product-body{padding:20px;flex:1;display:flex;flex-direction:column}.product-body h3{font-size:1.1rem;margin-bottom:10px;color:var(--primary-dark);line-height:1.3}.product-body p{color:var(--muted);font-size:0.9rem;flex:1;margin-bottom:16px;line-height:1.6}.product-link{color:var(--primary) !important;font-weight:600;font-size:0.9rem;display:inline-block;align-self:flex-start}.product-link:hover{color:var(--primary-dark) !important}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}.product-detail-img{background:var(--white);border-radius:16px;padding:40px;box-shadow:var(--shadow);position:sticky;top:100px}.product-detail-img img{width:100%;height:auto;max-height:500px;object-fit:contain}.product-detail-info{padding:0}.breadcrumb{font-size:0.85rem;color:var(--muted);margin-bottom:16px}.breadcrumb a{color:var(--primary)}.product-detail-info h1{font-size:2.2rem;color:var(--primary-dark);margin-bottom:12px;line-height:1.2}.cat-badge{display:inline-block;background:var(--primary-light);color:var(--primary-dark);padding:6px 14px;border-radius:6px;font-size:0.85rem;font-weight:600;margin-bottom:24px}.desc{font-size:1rem;color:var(--text);line-height:1.8;margin-bottom:32px}.spec-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:32px}.spec-table tr{border-bottom:1px solid var(--border)}.spec-table tr:last-child{border-bottom:none}.spec-table th,.spec-table td{padding:14px 20px;text-align:left;font-size:0.95rem}.spec-table th{background:var(--primary-light);color:var(--primary-dark);font-weight:600;width:40%}.spec-table td{color:var(--text)}.product-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.workshop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}.workshop-card{background:var(--white);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:all 0.3s}.workshop-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.workshop-card img{width:100%;height:240px;object-fit:cover}.workshop-card-body{padding:20px}.workshop-card h3{font-size:1.15rem;color:var(--primary-dark);margin-bottom:8px}.workshop-card p{color:var(--muted);font-size:0.9rem}.faq-wrap{max-width:900px;margin:0 auto}.faq-item{background:var(--white);border-radius:12px;margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden;border-left:4px solid var(--primary)}.faq-q{padding:20px 24px;font-weight:600;color:var(--primary-dark);font-size:1.05rem;cursor:pointer;background:var(--white)}.faq-a{padding:0 24px 20px;color:var(--text);line-height:1.7;font-size:0.95rem}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}.form-row{margin-bottom:18px}.form-row label{display:block;font-weight:600;margin-bottom:6px;color:var(--text);font-size:0.9rem}.form-row input,.form-row textarea,.form-row select{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:8px;font-family:inherit;font-size:0.95rem;transition:border-color 0.2s;background:var(--white)}.form-row input:focus,.form-row textarea:focus,.form-row select:focus{outline:none;border-color:var(--primary)}.footer{background:var(--primary-dark);color:white;padding:60px 0 30px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}.footer-col h4{font-size:1rem;margin-bottom:16px;color:white;text-transform:uppercase;letter-spacing:1px}.footer-col p,.footer-col a,.footer-col li{color:rgba(255,255,255,0.8);font-size:0.9rem;line-height:1.8;list-style:none}.footer-col a:hover{color:white}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}.footer-logo{height:48px;width:48px;object-fit:cover;border-radius:8px}.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid rgba(255,255,255,0.15);font-size:0.85rem;color:rgba(255,255,255,0.7)}@media (max-width:968px){.nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;gap:0;box-shadow:var(--shadow-lg)}.nav.open,.header-row.open .nav{display:flex}.nav-link{padding:12px 0;border-bottom:1px solid var(--border);width:100%}.mobile-menu-toggle{display:block}.hero h1{font-size:2.2rem}.hero-desc{font-size:1rem}.product-detail{grid-template-columns:1fr;gap:30px}.product-detail-img{position:static}.contact-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.section{padding:50px 0}}@media (max-width:640px){h1{font-size:2rem}h2{font-size:1.6rem}.product-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.topbar{font-size:0.75rem;padding:8px 12px}.container{padding:0 16px}}.text-center{text-align:center}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mt-3{margin-top:24px}.product-img-wrap img,.product-detail-img img{background:var(--white)}.whatsapp-float{position:fixed;bottom:24px;right:24px;background:var(--accent);color:white;width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.8rem;box-shadow:0 4px 16px rgba(37,211,102,0.5);z-index:999;transition:transform 0.2s;text-decoration:none}.whatsapp-float:hover{transform:scale(1.1)}.stats{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:60px 0;color:white}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;max-width:1200px;margin:0 auto;text-align:center}.stats-grid > div{padding:20px;background:rgba(255,255,255,0.1);border-radius:12px;backdrop-filter:blur(10px);transition:transform 0.3s ease,background 0.3s ease}.stats-grid > div:hover{transform:translateY(-5px);background:rgba(255,255,255,0.15)}.stat-num{font-size:48px;font-weight:700;color:#fff;margin-bottom:8px;line-height:1}.stat-label{font-size:16px;color:rgba(255,255,255,0.9);font-weight:400;text-transform:uppercase;letter-spacing:1px}@media (max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:20px}.stat-num{font-size:36px}.stat-label{font-size:14px}}@media (max-width:480px){.stats-grid{grid-template-columns:1fr;gap:15px}}.feat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;margin-top:40px;max-width:1000px;margin-left:auto;margin-right:auto}.feat-card{background:white;padding:30px;border-radius:12px;border:2px solid #e8f0fe;transition:all 0.3s ease;text-align:left}.feat-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,0.1);border-color:#2563eb}.feat-card .icon{font-size:40px;margin-bottom:16px;display:inline-block}.feat-card h3{color:#1e40af;font-size:20px;font-weight:700;margin:0 0 12px 0}.feat-card p{color:#4b5563;font-size:15px;line-height:1.6;margin:0}@media (max-width:768px){.feat-grid{grid-template-columns:1fr;gap:20px}}
.faq-list{max-width:900px;margin:40px auto 0;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:0;transition:all 0.3s ease;overflow:hidden}
.faq-item[open]{box-shadow:0 4px 12px rgba(0,0,0,0.08);border-color:#2563eb}
.faq-item summary{padding:18px 22px;cursor:pointer;font-weight:600;color:#1e40af;font-size:1.05rem;list-style:none;position:relative;padding-right:50px;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:#2563eb;transition:transform 0.3s}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item summary:hover{background:#f0f9ff}
.faq-item div{padding:0 22px 18px;color:#4b5563;line-height:1.7}
.faq-item p{margin:0}


/* ========================================
   移动端语言切换器优化
   ======================================== */

/* 移动端：增大按钮和字体 */
@media (max-width: 768px) {
  .lang-btn {
    padding: 12px 20px !important;
    font-size: 1rem !important;
    border-width: 2px !important;
    min-width: 140px;
    justify-content: center;
  }
  
  .lang-btn span {
    font-weight: 600;
  }
  
  /* 语言菜单：全宽显示，更容易点击 */
  .lang-menu {
    position: fixed !important;
    top: auto !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    min-width: 100% !important;
    max-width: 100% !important;
    max-height: 70vh !important;
    border-radius: 16px 16px 0 0 !important;
    padding: 20px 12px 12px !important;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.15) !important;
  }
  
  /* 语言选项：更大的点击区域 */
  .lang-option {
    padding: 16px 20px !important;
    font-size: 1.05rem !important;
    margin-bottom: 4px;
    border-radius: 8px !important;
  }
  
  /* 活动语言：更明显的高亮 */
  .lang-option.active {
    background: var(--primary) !important;
    color: white !important;
    font-weight: 700 !important;
  }
  
  /* 添加语言菜单标题 */
  .lang-menu::before {
    content: "🌐 Select Language / 选择语言";
    display: block;
    text-align: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
  }
  
  /* 优化滚动条 */
  .lang-menu::-webkit-scrollbar {
    width: 6px;
  }
  
  .lang-menu::-webkit-scrollbar-track {
    background: var(--bg);
    border-radius: 3px;
  }
  
  .lang-menu::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
  }
}

/* 超小屏幕（<400px）：进一步优化 */
@media (max-width: 400px) {
  .lang-btn {
    padding: 10px 16px !important;
    font-size: 0.95rem !important;
    min-width: 120px;
  }
  
  .lang-option {
    padding: 14px 16px !important;
    font-size: 1rem !important;
  }
  
  .lang-menu::before {
    font-size: 1rem !important;
  }
}

/* 平板（768px - 968px）：中等优化 */
@media (min-width: 768px) and (max-width: 968px) {
  .lang-btn {
    padding: 10px 18px !important;
    font-size: 0.95rem !important;
  }
  
  .lang-menu {
    min-width: 260px !important;
  }
  
  .lang-option {
    padding: 12px 18px !important;
    font-size: 0.95rem !important;
  }
}

/* 添加打开动画 */
.lang-menu.open {
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 添加遮罩层（移动端） */
@media (max-width: 768px) {
  .lang-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    display: none;
  }
  
  .lang-menu-overlay.open {
    display: block;
    animation: fadeIn 0.3s ease-out;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
}


/* 移动端语言切换器 - 只调整大小，保持原布局 */
@media (max-width: 768px) {
  /* 按钮：增大尺寸和字体 */
  .lang-btn {
    padding: 12px 18px !important;
    font-size: 1rem !important;
    min-width: 130px;
  }
  
  /* 下拉菜单：增大字体，保持原位置 */
  .lang-menu {
    min-width: 240px !important;
    padding: 12px 8px !important;
  }
  
  /* 语言选项：增大点击区域和字体 */
  .lang-option {
    padding: 14px 18px !important;
    font-size: 1rem !important;
    margin-bottom: 2px;
  }
  
  /* 活动语言：更明显 */
  .lang-option.active {
    font-weight: 700 !important;
  }
}

/* 超小屏幕优化 */
@media (max-width: 400px) {
  .lang-btn {
    padding: 10px 14px !important;
    font-size: 0.95rem !important;
    min-width: 110px;
  }
  
  .lang-menu {
    min-width: 220px !important;
  }
  
  .lang-option {
    padding: 12px 16px !important;
    font-size: 0.95rem !important;
  }
}

/* About Us 页面响应式布局 */
.about-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 968px) {
  .about-two-col {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  /* 图片在移动端放在上面 */
  .about-two-col > div:last-child {
    order: -1;
  }
}