/* === 特航商旅 · 设计系统 === */
:root {
  /* 品牌色彩 */
  --deep-navy: #0A1F44;
  --mid-blue: #1A3A6B;
  --accent-blue: #2563EB;
  --gold: #D4A853;
  --light-bg: #F8FAFC;
  --white: #FFFFFF;
  /* 页面主题色 */
  --ent-blue: #1690FF;
  --gov-red: #C41E3A;
  --per-sky: #33C5F3;
  /* 文字 */
  --text-primary: #0A1628;
  --text-secondary: #6B7280;
  --text-light: #B0C4DE;
  --text-muted: #9CA3AF;
  /* 边框 */
  --border-subtle: #EAEAEA;
  --border-light: #D6D9DE;
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  /* 字体 */
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Inter', 'DM Sans', system-ui, sans-serif;
  /* 间距 */
  --section-py: 80px;
  --section-px: 120px;
  --content-max: 1200px;
  --page-width: 1440px;
}

/* === 全局重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-cn);font-size:16px;color:var(--text-primary);background:var(--light-bg);line-height:1.6}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* === 导航栏 === */
.navbar {
  position: fixed;top:0;left:0;right:0;z-index:1000;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--section-px);height:80px;
  background:rgba(10,31,68,0.95);backdrop-filter:blur(10px);
  transition:background 0.3s;
}
.navbar.transparent{background:transparent;backdrop-filter:none}
.navbar.scrolled{background:rgba(10,31,68,0.98);backdrop-filter:blur(10px)}
.nav-logo{font-size:22px;font-weight:700;color:var(--white);font-family:var(--font-cn)}
.nav-logo img{height:40px;display:block}
.footer-logo img{height:36px;display:block;margin-bottom:4px}
.footer-qr-img{width:100%;height:100%;object-fit:contain;border-radius:6px}
.nav-links{display:flex;gap:40px;align-items:center}
.nav-links a{font-size:15px;color:var(--white);opacity:0.9;transition:all 0.3s;position:relative;font-weight:400}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:50%;width:0;height:2px;background:var(--gold);transition:all 0.3s ease;transform:translateX(-50%)}
.nav-links a:hover{opacity:1;color:var(--gold);font-weight:700}
.nav-links a:hover::after{width:100%}
.nav-links a.active{opacity:1;color:var(--gold);font-weight:700}
.nav-links a.active::after{width:100%}
.nav-right{display:flex;gap:16px;align-items:center}
.lang-switch{font-size:13px;color:var(--text-muted);font-family:var(--font-en);cursor:pointer;transition:color 0.2s;user-select:none}
.lang-switch:hover{color:var(--gold)}
.btn-login{padding:8px 18px;border:1px solid var(--gold);border-radius:var(--radius-sm);color:var(--gold);font-size:14px;font-weight:500;background:transparent;cursor:pointer;transition:all 0.2s}
.btn-login:hover{background:var(--gold);color:var(--deep-navy)}
.btn-primary{padding:10px 24px;background:var(--gold);color:var(--deep-navy);border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all 0.2s}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(212,168,83,0.4)}
.btn-outline{padding:12px 36px;border:1.5px solid var(--gold);border-radius:var(--radius-sm);color:var(--gold);font-size:16px;font-weight:500;background:transparent;cursor:pointer;transition:all 0.2s}
.btn-outline:hover{background:var(--gold);color:var(--deep-navy)}
.btn-gold{padding:14px 36px;background:var(--gold);color:var(--deep-navy);border:none;border-radius:var(--radius-sm);font-size:16px;font-weight:700;cursor:pointer;transition:all 0.2s}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(212,168,83,0.5)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer}
.hamburger span{width:24px;height:2px;background:var(--white)}

/* === 容器 === */
.container{max-width:var(--content-max);margin:0 auto;width:100%}
.section{padding:var(--section-py) var(--section-px)}
.section-narrow{padding:var(--section-py) 120px;max-width:var(--content-max);margin:0 auto}

/* === Section 标题 === */
.sec-tag{font-size:14px;font-weight:600;color:var(--accent-blue);margin-bottom:8px;letter-spacing:0.5px}
.sec-title{font-size:36px;font-weight:700;color:var(--text-primary)}
.sec-subtitle{font-size:16px;color:var(--text-secondary);margin-top:8px}

/* === 卡片 === */
.card-white{background:var(--white);border-radius:var(--radius-md);box-shadow:var(--shadow-md);overflow:hidden}
.card-outline{background:var(--white);border:1px solid var(--border-subtle);border-radius:var(--radius-md)}

/* === 按钮样式 === */
.btn{display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-cn);cursor:pointer;border:none;transition:all 0.3s}
.btn-sm{padding:8px 16px;font-size:13px;border-radius:var(--radius-sm)}
.btn-md{padding:12px 28px;font-size:15px;border-radius:var(--radius-sm)}
.btn-lg{padding:16px 40px;font-size:17px;border-radius:var(--radius-sm)}
.btn-gold-solid{background:var(--gold);color:var(--deep-navy);font-weight:700}
.btn-gold-solid:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(212,168,83,0.45)}
.btn-red-solid{background:var(--gov-red);color:var(--white)}
.btn-red-solid:hover{opacity:0.9;transform:translateY(-2px)}

/* === 客服浮窗 === */
.cs-widget {
  position:fixed;right:30px;top:50%;transform:translateY(-50%);z-index:999;
  display:flex;flex-direction:column;align-items:center;
  background:var(--deep-navy);border-radius:14px;padding:14px 0;
  box-shadow:var(--shadow-lg);width:52px;gap:10px;
}
.cs-widget .cs-icon {
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;
  position:relative;border-radius:8px;transition:background 0.2s;
}
.cs-widget .cs-icon:hover{background:rgba(255,255,255,0.1)}
.cs-widget .cs-icon svg{width:22px;height:22px;stroke:var(--white)}
.cs-widget .cs-divider{width:28px;height:1px;background:rgba(255,255,255,0.3)}
.cs-qr-popup {
  display:none;position:absolute;left:-160px;top:0;
  background:var(--white);padding:12px;border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);flex-direction:column;align-items:center;gap:6px;
}
.cs-widget .cs-icon:hover .cs-qr-popup{display:flex}

/* === Footer === */
.site-footer {
  background:var(--deep-navy);color:var(--text-light);padding:60px var(--section-px);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 2fr 1fr 1fr;gap:60px;max-width:var(--content-max);margin:0 auto}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.footer-logo{font-size:22px;font-weight:700;color:var(--white);font-family:var(--font-cn)}
.footer-tagline{font-size:14px;color:#8B9DC3}
.footer-col h4{color:var(--white);font-size:14px;font-weight:600;margin-bottom:12px}
.footer-col a{font-size:13px;color:#8B9DC3;display:block;margin-bottom:8px;transition:color 0.2s}
.footer-col a:hover{color:var(--gold)}
.footer-contact{padding-top:4px}
.footer-phone{font-size:18px;font-weight:700;color:var(--gold);font-family:var(--font-en)}
.footer-addr{font-size:13px;color:#8B9DC3;margin-top:4px}
.footer-qr{display:flex;gap:16px;margin-top:12px}
.footer-qr-item{text-align:center}
.footer-qr-box{width:70px;height:70px;background:#253A5E;border-radius:6px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;max-width:var(--content-max);margin:40px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,0.1);font-size:12px;color:#6B7280}

/* === 响应式 === */
/* === 响应式：平板 === */
@media(max-width:1279px){
  :root{--content-max:100%}
  .section{padding:60px 40px}
  .navbar{padding:0 40px}
  .footer-grid{grid-template-columns:1fr 1fr!important;gap:40px}
  /* 网格从多列→2列 */
  div[style*="grid-template-columns:repeat(4"]{grid-template-columns:repeat(2,1fr)!important}
  div[style*="grid-template-columns:repeat(6"]{grid-template-columns:repeat(3,1fr)!important}
  div[style*="grid-template-columns:repeat(8"]{grid-template-columns:repeat(4,1fr)!important}
  /* Hero */
  h1{font-size:42px!important}
  h1[style*="88px"]{font-size:56px!important}
  /* 角色卡 */
  .role-card{height:auto!important;min-height:380px!important}
  .role-card h2{font-size:22px!important}
  .role-card ul li{font-size:12px!important}
  /* 产品图标区 */
  .icon-card{width:48px!important;height:48px!important}
  /* 发展历程 */
  div[style*="grid-template-columns:repeat(4"] div[style*="padding:24px 20px"]{padding:16px 12px!important}
}

/* === 响应式：手机 === */
@media(max-width:767px){
  :root{--section-py:48px;--section-px:20px}
  .section{padding:40px 16px}
  .navbar{padding:0 16px;height:60px}
  .nav-links{display:none;position:fixed;top:60px;left:0;right:0;background:#0A1F44;flex-direction:column;padding:16px;gap:12px;z-index:999}
  .nav-links.active{display:flex}
  .hamburger{display:flex;z-index:1000}
  .nav-right{gap:8px}
  .nav-right .btn-primary{font-size:12px;padding:6px 12px}
  .nav-right .btn-login{font-size:12px;padding:6px 12px}
  .lang-switch{font-size:11px!important}
  /* 所有网格强制单列 */
  div[style*="grid-template-columns"]{grid-template-columns:1fr!important}
  div[style*="gap:24px"]{gap:16px!important}
  /* Footer */
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .footer-qr{justify-content:center!important}
  .site-footer{padding:40px 20px}
  .cs-widget{right:8px;width:40px;padding:8px 0;border-radius:10px}
  .cs-widget svg{width:18px!important;height:18px!important}
  .cs-divider{width:22px!important}
  .cs-qr-popup{right:50px!important;left:auto!important;x:0!important}
  /* 标题 */
  .sec-title{font-size:26px}
  .sec-subtitle{font-size:14px}
  h1{font-size:36px!important}
  h1[style*="88px"]{font-size:48px!important}
  h1[style*="72px"]{font-size:40px!important}
  /* Hero */
  section[style*="min-height:600px"]{min-height:420px!important;padding:100px 20px 60px!important}
  /* 角色卡 */
  .role-card{height:auto!important;min-height:340px!important;padding:24px!important}
  .role-card h2{font-size:20px!important}
  .role-card ul li{font-size:12px!important}
  .role-card img{height:140px!important}
  /* 产品卡 */
  .card-outline{padding:20px!important}
  /* 统计数字 */
  .stat-value{font-size:32px!important}
  /* FAQ */
  .faq-answer-inner{padding:0 20px!important}
  .faq-item.open .faq-answer-inner{padding:12px 20px 4px!important}
  .faq-text{font-size:14px!important}
  /* 招聘卡 */
  div[style*="padding:40px 36px"][style*="border-radius:20px"]{padding:24px 20px!important}
  /* 个人出行 Hero */
  h1[style*="Ma Shan Zheng"]{line-height:1.5!important}
  /* 二维码区 */
  div[style*="gap:40px"][style*="justify-content:center"]{flex-direction:column!important}
  /* 痛点卡 */
  .pain-card{height:auto!important;min-height:200px!important;padding:24px 20px!important}
  /* 技术优势卡 */
  .ta-card{padding:20px!important;height:auto!important;min-height:140px!important}
  /* 合作客户 Logo */
  div[style*="height:90px"]{height:72px!important}
  div[style*="font-size:15px;font-weight:700;color"]{font-size:13px!important}
  /* CTA */
  div[style*="gap:28px"][style*="justify-content:center"]{flex-direction:column!important;gap:16px!important}
}

/* === 动画 === */
.fade-in{animation:fadeIn 0.6s ease-out forwards}
.slide-up{animation:slideUp 0.6s ease-out forwards}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* === 工具类 === */
.text-center{text-align:center}
.mt-0{margin-top:0}
.gap-16{gap:16px}
.gap-20{gap:20px}
.gap-24{gap:24px}
.gap-32{gap:32px}
.flex{display:flex}
.flex-col{flex-direction:column}
.items-center{align-items:center}
.justify-center{justify-content:center}
.justify-between{justify-content:space-between}
.w-full{width:100%}

/* === FAQ === */
.faq-list{max-width:900px;margin:0 auto;width:100%}
.faq-item{padding:24px 0;cursor:pointer;border-bottom:1px solid var(--border-subtle);transition:background 0.2s}
.faq-item:hover{background:rgba(0,0,0,0.01)}
.faq-q{display:flex;align-items:center;gap:16px;justify-content:space-between}
.faq-q-icon{width:28px;height:28px;color:#3B82F6;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex-shrink:0;font-family:var(--font-en)}
.faq-text{font-size:16px;font-weight:600;color:#0A1628;flex:1}
.faq-arrow svg{width:20px;height:20px;color:#9CA3AF;transition:transform .3s}
.faq-item.open .faq-arrow svg{transform:rotate(90deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(0.4,0,0.2,1);will-change:max-height}
.faq-answer-inner{display:flex;align-items:flex-start;gap:16px;padding:0 44px;font-size:15px;color:var(--text-secondary);line-height:1.9}
.faq-item.open .faq-answer-inner{padding:14px 44px 4px}
.faq-a-icon{width:28px;height:28px;border-radius:6px;background:#3B82F6;color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;font-family:var(--font-en);flex-shrink:0}
.faq-q-red .faq-q-icon{color:#C41E3A}
.faq-q-red .faq-a-icon{background:#C41E3A}