/* ==========================================
   Zepbound CN - 替西帕肽中文信息站
   Modern responsive CSS (2026 SEO optimized)
   ========================================== */

/* CSS Custom Properties */
:root {
  --primary: #006298;
  --primary-dark: #004a73;
  --primary-light: #e8f4fb;
  --accent: #6b3fa0;
  --accent-light: #f3edf9;
  --gradient-blue: linear-gradient(135deg, #006298 0%, #0088cc 100%);
  --gradient-purple: linear-gradient(135deg, #6b3fa0 0%, #9b6fd4 100%);
  --gradient-teal: linear-gradient(135deg, #006298 0%, #00a896 100%);
  --text: #1a1a2e;
  --text-light: #555;
  --text-muted: #888;
  --bg: #ffffff;
  --bg-alt: #f8f9fb;
  --bg-card: #ffffff;
  --border: #e0e4ea;
  --border-light: #eef1f5;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-h: 72px;
  --max-w: 1200px;
  --transition: 0.25s ease;
}

/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);line-height:1.7;background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none}
button{cursor:pointer;font-family:inherit}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* Typography */
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
h1{font-size:clamp(2rem, 4vw, 3rem);margin-bottom:1rem}
h2{font-size:clamp(1.5rem, 3vw, 2.2rem);margin-bottom:0.75rem}
h3{font-size:clamp(1.2rem, 2vw, 1.6rem);margin-bottom:0.5rem}
p{margin-bottom:1rem}
.section-title{text-align:center;margin-bottom:3rem}
.section-title h2{margin-bottom:0.5rem}
.section-title p{color:var(--text-light);font-size:1.1rem;max-width:700px;margin:0 auto}

/* ===== HEADER ===== */
.header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h);display:flex;align-items:center}
.header .container{display:flex;align-items:center;justify-content:space-between;width:100%}
.header-logo{font-size:1.5rem;font-weight:800;color:var(--primary);display:flex;align-items:center;gap:8px}
.header-logo span{background:var(--gradient-blue);color:#fff;padding:4px 12px;border-radius:6px;font-size:0.85rem}
.header-logo:hover{color:var(--primary)}
.nav{display:flex;align-items:center;gap:4px}
.nav a, .nav .dropdown>span{padding:8px 16px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text-light);transition:all var(--transition);display:block;white-space:nowrap}
.nav a:hover, .nav .dropdown:hover>span{background:var(--primary-light);color:var(--primary)}
.nav .dropdown{position:relative}
.nav .dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);min-width:200px;padding:8px 0;z-index:100}
.nav .dropdown:hover .dropdown-menu{display:block}
.nav .dropdown-menu a{display:block;padding:10px 20px;border-radius:0;font-size:0.9rem}
.nav .dropdown-menu a:hover{background:var(--bg-alt)}
.cta-btn{background:var(--gradient-blue);color:#fff!important;padding:10px 24px!important;border-radius:50px!important;font-weight:600!important;transition:transform var(--transition),box-shadow var(--transition)!important}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(0,98,152,0.3)}
.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;color:var(--text);padding:4px}

/* ===== HERO ===== */
.hero{padding:80px 0 60px;background:var(--gradient-blue);color:#fff;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;right:-100px;bottom:-100px;width:400px;height:400px;background:rgba(255,255,255,0.05);border-radius:50%}
.hero .container{position:relative;z-index:1}
.hero h1{color:#fff;font-size:clamp(2rem, 5vw, 3.5rem);margin-bottom:1.2rem}
.hero p{font-size:1.2rem;opacity:0.9;max-width:600px;margin-bottom:2rem}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.hero-btn-primary{background:#fff;color:var(--primary);padding:14px 32px;border-radius:50px;font-weight:700;font-size:1rem;transition:all var(--transition);display:inline-block}
.hero-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,0.2);color:var(--primary)}
.hero-btn-secondary{background:rgba(255,255,255,0.15);color:#fff;padding:14px 32px;border-radius:50px;font-weight:600;font-size:1rem;border:1px solid rgba(255,255,255,0.3);transition:all var(--transition);display:inline-block}
.hero-btn-secondary:hover{background:rgba(255,255,255,0.25);color:#fff}

/* ===== SAFETY BANNER ===== */
.safety-banner{background:#fff3cd;border:1px solid #ffc107;border-left:4px solid #ff9800;padding:16px 20px;border-radius:var(--radius-sm);margin:20px 0}
.safety-banner strong{color:#e65100}
.safety-banner p{margin-bottom:0;font-size:0.9rem}

/* ===== CARDS ===== */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(320px, 1fr));gap:24px}
.card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius);padding:32px;transition:all var(--transition)}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card-icon{width:56px;height:56px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.card-icon.blue{background:var(--primary-light);color:var(--primary)}
.card-icon.purple{background:var(--accent-light);color:var(--accent)}
.card h3{margin-bottom:0.5rem}
.card p{color:var(--text-light);font-size:0.95rem;margin-bottom:0}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-weight:600;font-size:0.9rem}

/* ===== CONTENT SECTION ===== */
.section{padding:80px 0}
.section.bg-alt{background:var(--bg-alt)}
.section.bg-gradient{background:var(--gradient-blue);color:#fff}
.section.bg-gradient h2,.section.bg-gradient h3{color:#fff}
.section.bg-gradient p{color:rgba(255,255,255,0.85)}

/* Info blocks */
.info-block{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:60px}
.info-block.reverse{direction:rtl}
.info-block.reverse>*{direction:ltr}
.info-block-image{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.info-block-content h3{font-size:1.8rem;margin-bottom:1rem}
.info-block-content p{color:var(--text-light);font-size:1.05rem}

/* Stat cards */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));gap:20px}
.stat-card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius);padding:28px;text-align:center}
.stat-card .stat-number{font-size:2.5rem;font-weight:800;background:var(--gradient-blue);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-card .stat-label{color:var(--text-light);font-size:0.9rem;margin-top:4px}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border-light);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden}
.faq-question{padding:20px 24px;background:var(--bg-alt);font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1.05rem}
.faq-question:hover{background:var(--primary-light)}
.faq-answer{padding:0 24px 20px;color:var(--text-light);font-size:0.95rem;line-height:1.8}
.faq-answer p{margin-bottom:0.5rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));gap:30px}
.step{text-align:center;padding:24px}
.step-number{width:48px;height:48px;background:var(--gradient-blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;margin:0 auto 16px}
.step h4{margin-bottom:0.5rem}

/* Table */
.data-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:0.95rem}
.data-table th{background:var(--primary);color:#fff;padding:14px 16px;text-align:left;font-weight:600}
.data-table td{padding:12px 16px;border-bottom:1px solid var(--border-light)}
.data-table tr:nth-child(even){background:var(--bg-alt)}
.data-table tr:hover{background:var(--primary-light)}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:0.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{color:var(--text)}

/* Page banner */
.page-banner{background:var(--gradient-teal);color:#fff;padding:60px 0;text-align:center}
.page-banner h1{color:#fff}
.page-banner p{color:rgba(255,255,255,0.9);font-size:1.1rem;max-width:700px;margin:0 auto}

/* Tabs */
.tabs{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:30px;flex-wrap:wrap}
.tab-btn{padding:12px 24px;background:none;border:none;font-weight:600;color:var(--text-light);font-size:0.95rem;border-bottom:3px solid transparent;margin-bottom:-2px;transition:all var(--transition)}
.tab-btn:hover{color:var(--primary)}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}

/* Alert boxes */
.alert{padding:16px 20px;border-radius:var(--radius-sm);margin:20px 0;font-size:0.95rem}
.alert-info{background:var(--primary-light);border:1px solid #b3d9f0;color:var(--primary-dark)}
.alert-warning{background:#fff3cd;border:1px solid #ffc107;color:#856404}
.alert-danger{background:#fde8e8;border:1px solid #f5c6cb;color:#721c24}

/* ===== FOOTER ===== */
.footer{background:#1a1a2e;color:rgba(255,255,255,0.7);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,0.6);font-size:0.9rem;padding:4px 0;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;font-size:0.85rem}
.disclaimer{font-size:0.8rem;color:rgba(255,255,255,0.4);line-height:1.6;margin-top:16px}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .info-block{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 768px) {
  .header{height:auto;padding:12px 0}
  .nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:#fff;flex-direction:column;padding:16px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg)}
  .nav.open{display:flex}
  .nav .dropdown-menu{position:static;box-shadow:none;border:none;padding-left:16px}
  .mobile-menu-btn{display:block}
  .hero{padding:50px 0 40px}
  .hero h1{font-size:1.8rem}
  .hero p{font-size:1rem}
  .section{padding:50px 0}
  .cards-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;text-align:center}
  .data-table{font-size:0.8rem}
  .data-table th,.data-table td{padding:8px}
}
@media (max-width: 480px) {
  .container{padding:0 16px}
  .hero-btn-primary,.hero-btn-secondary{padding:12px 24px;font-size:0.9rem}
  .stat-grid{grid-template-columns:1fr}
}

/* Print */
@media print {
  .header,.footer,.hero,.nav,.mobile-menu-btn{display:none}
  body{color:#000}
  .section{padding:20px 0}
}

/* Accessibility */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px}
.skip-link{position:absolute;top:-100px;left:0;background:var(--primary);color:#fff;padding:8px 16px;z-index:9999}
.skip-link:focus{top:0}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.animate{animation:fadeInUp 0.5s ease forwards}

/* ==========================================
   企业微信客服浮动图标
   ========================================== */
.wecom-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  box-shadow: 0 4px 18px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  cursor: pointer;
  background: #07C160;
  text-decoration: none;
}
.wecom-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 26px rgba(7,193,96,0.35);
}
.wecom-float svg {
  width: 32px;
  height: 32px;
  display: block;
}
.wecom-float::after {
  content: '微信客服';
  position: absolute;
  right: 68px;
  top: 50%;
  transform: translateY(-50%);
  background: #333;
  color: #fff;
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.wecom-float:hover::after {
  opacity: 1;
}
@media (max-width: 768px) {
  .wecom-float {
    bottom: 16px;
    right: 16px;
    width: 48px;
    height: 48px;
  }
  .wecom-float svg {
    width: 28px;
    height: 28px;
  }
}