/* =====================================
   品之裕工业科技 - 全站样式 V4.1 (终极修复版)
   ===================================== */

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.6;color:#333;background:#fff;overflow-x:hidden}
a{color:#1a73e8;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
button{cursor:pointer;font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 颜色变量 ===== */
:root{
  --primary:#1a56db;
  --primary-dark:#1042a3;
  --primary-light:#e8f0fe;
  --accent:#f5a623;
  --dark:#0f1b2d;
  --gray:#666;
  --border:#e5e9f0;
  --success:#16a34a;
}

/* ===== 头部组合 ===== */
.header-group{
  position:fixed;
  top:0;left:0;right:0;
  z-index:9999;
  background:#ffffff;
  box-shadow:0 2px 12px rgba(0,0,0,.08);
}
.top-bar{
  background:#ffffff;
  border-bottom:1px solid #eef0f3;
  font-size:12px;
  height:32px;
  line-height:32px;
}
.top-bar-inner{display:flex;justify-content:space-between;align-items:center;height:32px}
.top-bar-left{display:flex;align-items:center;gap:14px;color:#555}
.phone-icon{font-size:13px}
.phone-num{color:#d32f2f;font-size:13px;font-weight:400}
.email-icon{font-size:13px;margin-left:6px}
.top-bar-left a{color:#555;font-size:12px}
.admin-link{color:var(--primary);font-weight:500;font-size:12px}
.main-header{
  background:#ffffff;
  border-bottom:1px solid #eef0f3;
  height:52px;
}
.nav-inner{display:flex;justify-content:space-between;align-items:center;height:52px}

/* ===== Logo 精致小巧（上下结构，左对齐） ===== */
.logo{
  display:flex;
  flex-direction:column;
  line-height:1.2;
  text-decoration:none;
}
.logo-main{
  font-size:14px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:1.5px;
  line-height:1.2;
}
.logo-sub{
  font-size:9px;
  color:#999;
  letter-spacing:2.5px;
  margin-top:1px;
}

.main-nav{display:flex;gap:4px;align-items:center}
.main-nav a{padding:5px 12px;border-radius:5px;color:#444;font-size:14px;font-weight:500;transition:.2s;display:inline-block}
.main-nav a:hover{background:var(--primary-light);color:var(--primary);text-decoration:none}
.main-nav a.active{background:var(--primary);color:#fff;padding:5px 14px;border-radius:5px}
body{padding-top:84px}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#0f1b2d 0%,#1a3a6c 50%,#1a56db 100%);color:#fff;padding:60px 0 50px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:60%;height:200%;background:radial-gradient(circle,rgba(26,86,219,.3) 0%,transparent 70%);animation:heroGlow 8s ease-in-out infinite}
@keyframes heroGlow{0%,100%{opacity:.5}50%{opacity:1}}
.hero-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;position:relative;z-index:1}
.hero-left{max-width:600px}
.hero h1,.hero-inner h1{font-size:42px;line-height:1.2;margin-bottom:20px;font-weight:800}
.orange{color:var(--accent);font-weight:700}
.hero-conclusion{font-size:15px;line-height:2;margin-bottom:28px;opacity:.95;max-width:560px}
.hero-buttons{display:flex;gap:14px;margin-bottom:36px;flex-wrap:wrap}
.btn-primary{display:inline-block;background:var(--primary);color:#fff;padding:14px 32px;border-radius:8px;font-size:15px;font-weight:600;border:none;cursor:pointer;transition:.25s;text-decoration:none}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(26,86,219,.35);text-decoration:none;color:#fff}
.btn-outline-light{display:inline-block;background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7);padding:12px 28px;border-radius:8px;font-size:15px;cursor:pointer;text-decoration:none}
.btn-outline-light:hover{background:rgba(255,255,255,.2);text-decoration:none;color:#fff}
.btn-secondary{display:inline-block;background:var(--primary-light);color:var(--primary);padding:12px 28px;border-radius:8px;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:.2s;text-decoration:none}
.btn-secondary:hover{background:#d0e2ff;text-decoration:none;color:var(--primary)}
.hero-stats{display:flex;gap:36px;flex-wrap:wrap}
.stat-item{display:flex;flex-direction:column}
.stat-num{font-size:32px;font-weight:800;line-height:1.1}
.stat-plus{font-size:24px;font-weight:700;display:inline}
.stat-unit{font-size:14px;font-weight:600;margin-left:2px}
.stat-label{font-size:12px;color:rgba(255,255,255,.7);margin-top:4px}
.hero-right{display:flex;flex-direction:column;gap:14px}
.hero-card{background:rgba(255,255,255,.12);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:18px 20px;display:flex;align-items:center;gap:14px;transition:.3s}
.hero-card:hover{background:rgba(255,255,255,.18);transform:translateX(-4px)}
.card-icon{font-size:28px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.15);border-radius:12px;flex-shrink:0}
.hero-card h3{font-size:15px;font-weight:600;margin-bottom:2px}
.hero-card p{font-size:12px;opacity:.8;line-height:1.4}

/* ===== Page Hero ===== */
.page-hero{background:linear-gradient(135deg,#0f1b2d,#1a3a6c);color:#fff;padding:50px 0;text-align:center}
.page-hero h1{font-size:32px;margin-bottom:8px;font-weight:800}
.page-hero p{font-size:15px;opacity:.9}
.section-title{font-size:28px;font-weight:800;text-align:center;margin-bottom:8px;color:#1a1a2e}
.section-sub{text-align:center;color:var(--gray);font-size:14px;margin-bottom:36px}

/* ===== 品牌矩阵 ===== */
.brand-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.brand-card{background:#fff;border-radius:12px;padding:24px;border-top:4px solid var(--primary);box-shadow:0 2px 12px rgba(0,0,0,.05);transition:.25s}
.brand-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(0,0,0,.1)}
.brand-card.ibag{border-top-color:#e53935}
.brand-card.fischer{border-top-color:#1a73e8}
.brand-card.gmn{border-top-color:#16a34a}
.brand-card.steptec{border-top-color:#7c3aed}
.brand-logo{font-size:20px;font-weight:800;margin-bottom:2px}
.brand-country{font-size:12px;color:#999;margin-bottom:14px}
.brand-table{width:100%;border-collapse:collapse;font-size:12px}
.brand-table th{background:#f5f7fa;padding:8px 6px;text-align:left;font-weight:600;color:#555;border-bottom:2px solid #e5e9f0}
.brand-table td{padding:7px 6px;border-bottom:1px solid #f0f0f0;color:#444}
.brand-table .down{color:#16a34a;font-weight:700}

/* ===== 产品卡片 ===== */
.product-preview,.products-page{padding:60px 0;background:#fff}
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-bottom:32px}
.product-card{display:block;background:#fff;border:1px solid var(--border);border-radius:12px;padding:24px;text-decoration:none;color:inherit;transition:.3s;position:relative;overflow:hidden}
.product-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transition:.3s}
.product-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,.1);text-decoration:none;color:inherit}
.product-card:hover::before{transform:scaleX(1)}
.pc-icon{font-size:32px;margin-bottom:12px}
.product-card h3{font-size:16px;font-weight:700;margin-bottom:8px;color:#1a1a2e}
.product-card p{font-size:13px;color:var(--gray);margin-bottom:12px;line-height:1.5}
.pc-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.pc-meta span{background:var(--primary-light);color:var(--primary);padding:3px 10px;border-radius:4px;font-size:12px;font-weight:500}
.center-btn{text-align:center}

/* ===== FAQ ===== */
.home-faq,.faq-page{padding:60px 0;background:#f9fbfe}
.faq-list,.faq-preview{max-width:800px;margin:0 auto 24px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:8px;margin-bottom:10px;overflow:hidden}
.faq-item summary{padding:14px 20px;cursor:pointer;font-weight:600;font-size:14px;color:#1a1a2e;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:20px;color:var(--primary);font-weight:400}
.faq-item[open] summary::after{content:'−'}
.faq-item p{padding:0 20px 14px;font-size:13px;color:#555;line-height:1.7}

/* ===== 案例 ===== */
.cases-page{padding:60px 0}
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.case-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:24px;transition:.25s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.case-card h3{font-size:16px;font-weight:700;margin-bottom:12px;color:#1a1a2e}
.case-card .industry-tag{display:inline-block;background:var(--primary-light);color:var(--primary);padding:2px 10px;border-radius:4px;font-size:12px;margin-bottom:12px}
.case-card p{font-size:13px;color:#555;margin-bottom:6px;line-height:1.6}

/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg,var(--primary),#2563eb);color:#fff;padding:50px 0;text-align:center}
.cta-section h2{font-size:26px;margin-bottom:10px}
.cta-section p{font-size:15px;opacity:.9;margin-bottom:24px}

/* ===== 页脚 ===== */
.site-footer{background:#0f1b2d;color:#aaa;padding:48px 0 20px;font-size:13px;margin-top:0}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:24px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
.footer-col a{color:#8ab4f0;text-decoration:none;display:inline-block;margin-bottom:4px}
.footer-col a:hover{text-decoration:underline}
.footer-bottom{border-top:1px solid #1e2d4a;text-align:center;padding-top:16px;font-size:12px;color:#666}

/* ===== 询价弹窗 ===== */
.inquiry-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:99999;justify-content:center;align-items:center}
.inquiry-overlay.active{display:flex}
.inquiry-modal{background:#fff;border-radius:14px;padding:32px;width:90%;max-width:440px;position:relative;box-shadow:0 12px 48px rgba(0,0,0,.25)}
.inquiry-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:28px;cursor:pointer;color:#999;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.inquiry-close:hover{background:#f5f5f5}
.inquiry-modal h3{margin:0 0 6px;font-size:20px;color:#1a1a2e}
.inquiry-modal input,.inquiry-modal textarea{width:100%;padding:10px 14px;margin-bottom:12px;border:1px solid #ddd;border-radius:8px;font-size:14px;box-sizing:border-box;font-family:inherit}
.inquiry-modal button[type="submit"]{width:100%;background:var(--primary);color:#fff;border:none;padding:13px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer}
.inquiry-success{text-align:center;padding:20px;color:var(--success);font-size:16px;font-weight:600}

/* ===== 浮动客服 ===== */
.float-contact{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:8px;z-index:9990}
.float-btn{width:48px;height:48px;border-radius:50%;border:none;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.15);transition:.2s;text-decoration:none}
.float-btn:hover{transform:scale(1.1)}
.float-btn.phone{background:#16a34a;color:#fff}
.float-btn.email{background:#1a73e8;color:#fff}
.float-btn.inquiry{background:var(--primary);color:#fff}
.float-btn.top{background:#f5f5f5;color:#666;font-size:22px}

/* ================================================
   ✅ 修复：响应式代码统一放在 @media 中
   ================================================ */
@media(max-width:900px){
  .header-group{position:static;box-shadow:none}
  body{padding-top:0}
  .hero-inner{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .top-bar{height:auto;line-height:1.6;padding:4px 0}
  .top-bar-inner{height:auto;flex-wrap:wrap;gap:4px}
  .main-header{height:auto}
  .nav-inner{height:auto;flex-wrap:wrap;padding:8px 0}
  .main-nav{flex-wrap:wrap;justify-content:center}
  .logo-main{font-size:13px}
  .hero-stats{gap:20px}
  .stat-num{font-size:26px}
}

@media(max-width:640px){
  .hero h1{font-size:24px}
  .float-contact{right:10px;bottom:10px}
  .float-btn{width:42px;height:42px;font-size:18px}
  .top-bar-left{gap:8px;flex-wrap:wrap}
  .logo-main{font-size:13px}
  .logo-sub{font-size:8px}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .stat-num{font-size:22px}
  .hero-buttons{flex-direction:column;align-items:stretch}
  .hero-conclusion{font-size:13px}
  .btn-primary,.btn-outline-light{text-align:center;padding:12px 20px}
  .hero-card{padding:14px 16px}
  .card-icon{font-size:22px;width:40px;height:40px}
  .hero-card h3{font-size:13px}
  .section-title{font-size:22px}
}