/* 航倍大数据官网样式
   色彩严格取自《航倍企服集团视觉体系VIS》标准色页
   字体：思源宋体（Noto Serif SC / Source Han Serif），开源免费商用，
        替代 VIS 标准字（方正特雅宋），已确认采用 */
:root{
  /* VIS 主色 */
  --brand:#1a2b77;      /* 深海军蓝 - 品牌主色 */
  --gold:#c9a063;       /* 金铜 - 辅助主色，点缀约10% */
  /* VIS 辅助色 */
  --deep:#16284b;       /* 深蓝变体 - 深色区块 */
  --cream:#f2e2d2;      /* 浅米杏 - 浅色区块 */
  --taupe:#99847a;      /* 灰棕 - 次要文字 */
  --wine:#8f1d26;       /* 酒红 - 警示 */
  --slate:#828691;      /* 灰蓝 - 图表辅助 */
  --ink:#211814;        /* 近黑 - 正文 */

  --white:#ffffff;
  --bg-soft:#f7f8fb;
  --line:rgba(26,43,119,.12);

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;

  --maxw:1180px;
  --radius:4px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%} /* 微信内禁止字体自动缩放 */
body{font-family:var(--font-sans);color:var(--ink);background:var(--white);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s,box-shadow .3s;
     padding-top:env(safe-area-inset-top)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav-logo img{height:38px;width:auto}
.nav-logo .logo-dark{display:none}
.nav-logo .logo-light{display:block}
.nav.scrolled{background:rgba(255,255,255,.97);box-shadow:0 1px 0 var(--line)}
.nav.scrolled .logo-dark{display:block}
.nav.scrolled .logo-light{display:none}

.nav-links{display:flex;align-items:center;gap:28px}
.nav-links>a{font-size:15px;color:var(--white);opacity:.92;transition:opacity .2s,color .2s}
.nav-links>a:hover{opacity:1;color:var(--gold)}
.nav.scrolled .nav-links>a{color:var(--brand)}
.nav.scrolled .nav-links>a:hover{color:var(--gold)}

.btn{display:inline-block;padding:10px 22px;border-radius:var(--radius);font-size:15px;
     transition:transform .2s,background .2s,color .2s,border-color .2s;cursor:pointer;border:1px solid transparent}
.btn:hover{transform:translateY(-1px)}
.btn-console{background:var(--gold);color:#fff !important;opacity:1 !important;padding:9px 18px}
.btn-console:hover{background:#b98d4e;color:#fff !important}
.btn-gold{background:var(--gold);color:#fff}
.btn-gold:hover{background:#b98d4e}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

.lang-switch{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;
     padding:6px 12px;border-radius:var(--radius);font-size:13px;letter-spacing:.5px;cursor:pointer}
.nav.scrolled .lang-switch{border-color:var(--line);color:var(--brand)}
.lang-switch:hover{border-color:var(--gold);color:var(--gold)}

.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:28px;height:22px;position:relative}
.nav-toggle span{display:block;height:2px;background:#fff;margin:5px 0;transition:.3s}
.nav.scrolled .nav-toggle span{background:var(--brand)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:640px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
    radial-gradient(1000px 500px at 78% 18%,rgba(201,160,99,.28),transparent 60%),
    linear-gradient(140deg,var(--brand) 0%,var(--deep) 55%,#0e1a33 100%)}
.hero-bg::after{content:"";position:absolute;inset:0;opacity:.16;
    background-image:linear-gradient(rgba(255,255,255,.35) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.35) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(circle at 70% 40%,#000 0%,transparent 72%);
    -webkit-mask-image:radial-gradient(circle at 70% 40%,#000 0%,transparent 72%)}
.hero-inner{position:relative;padding:140px 24px 90px}
.hero-eyebrow{color:var(--gold);letter-spacing:2px;font-size:14px;margin-bottom:18px}
.hero-title{font-family:var(--font-serif);font-size:58px;line-height:1.25;font-weight:600;letter-spacing:2px}
.hero-sub{max-width:640px;margin:24px 0 36px;font-size:17px;color:rgba(255,255,255,.82)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:48px}
.hero-badges span{font-size:13px;padding:6px 14px;border:1px solid rgba(255,255,255,.28);
     border-radius:999px;color:rgba(255,255,255,.85)}

/* ---------- 数据实力 ---------- */
.stats{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:46px 24px}
.stat{text-align:center}
.stat b{display:block;font-family:var(--font-serif);font-size:40px;color:var(--brand);font-weight:600;line-height:1.2}
.stat b i{font-style:normal;font-size:22px;color:var(--gold);margin-left:2px}
.stat span{font-size:14px;color:var(--taupe)}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section-deep{background:linear-gradient(160deg,var(--deep),#101d38);color:#fff}
.section-cream{background:var(--cream)}
.sec-eyebrow{color:var(--gold);letter-spacing:2px;font-size:13px;margin-bottom:12px}
.sec-eyebrow.light{color:var(--gold)}
.sec-title{font-family:var(--font-serif);font-size:34px;color:var(--brand);font-weight:600;
     letter-spacing:1px;margin-bottom:48px;position:relative;padding-bottom:18px}
.sec-title::after{content:"";position:absolute;left:0;bottom:0;width:56px;height:3px;background:var(--gold)}
.sec-title.light{color:#fff}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:start}
.about-text p{margin-bottom:20px;color:#3d3833}
.honor-list{list-style:none;background:var(--bg-soft);border-left:3px solid var(--gold);padding:28px 30px}
.honor-list li{display:flex;align-items:center;gap:12px;padding:9px 0;font-size:15px}
.honor-dot{width:7px;height:7px;border-radius:50%;background:var(--brand);flex:0 0 auto}
.honor-list em{font-style:normal}

/* 卡片 */
.cards{display:grid;gap:24px}
.cards-4{grid-template-columns:repeat(4,1fr)}
.cards-2{grid-template-columns:repeat(2,1fr)}
.card{padding:32px 28px;border-radius:var(--radius);transition:transform .25s,box-shadow .25s}
.card h3{font-size:19px;margin-bottom:14px;font-weight:600}
.card p{font-size:14.5px;line-height:1.85}
.card-dark{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.card-dark h3{color:#fff}
.card-dark p{color:rgba(255,255,255,.72)}
.card-dark:hover{transform:translateY(-4px);background:rgba(255,255,255,.1);border-color:var(--gold)}

.card-product{background:#fff;border:1px solid var(--line);box-shadow:0 2px 18px rgba(26,43,119,.06)}
.card-product:hover{transform:translateY(-4px);box-shadow:0 10px 34px rgba(26,43,119,.12)}
.card-product h3{font-family:var(--font-serif);font-size:26px;color:var(--brand);letter-spacing:1px}
.card-product h3 small{font-size:15px;color:var(--taupe);margin-left:8px;font-family:var(--font-sans)}
.card-product p{color:#4a443e;margin-bottom:18px}
.card-product ul{list-style:none}
.card-product ul li{position:relative;padding:7px 0 7px 18px;font-size:14.5px;color:#3d3833;border-top:1px dashed var(--line)}
.card-product ul li::before{content:"";position:absolute;left:0;top:16px;width:6px;height:6px;background:var(--gold);border-radius:50%}
.pill{display:inline-block;background:rgba(26,43,119,.08);color:var(--brand);font-size:12px;
      padding:5px 12px;border-radius:999px;margin-bottom:16px;letter-spacing:1px}
.pill-gold{background:rgba(201,160,99,.16);color:#9a7639}
.link-arrow{display:inline-block;margin-top:22px;color:var(--gold);font-size:15px}
.link-arrow:hover{color:var(--brand)}

/* 服务行 */
.service-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.service{background:var(--bg-soft);padding:24px 26px;border-top:2px solid var(--brand)}
.service b{display:block;color:var(--brand);font-size:16px;margin-bottom:6px}
.service span{font-size:14px;color:var(--taupe)}

/* 行业 */
.ind-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.ind{background:#fff;border:1px solid rgba(26,43,119,.1);padding:34px 8px;text-align:center;
     border-radius:var(--radius);transition:.25s}
.ind span{font-size:16px;color:var(--brand)}
.ind:hover{background:var(--brand);border-color:var(--brand)}
.ind:hover span{color:#fff}
.ind-note{margin-top:28px;font-size:14px;color:var(--taupe)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.contact-item{border-left:3px solid var(--gold);padding:6px 0 6px 22px}
.contact-item b{display:block;color:var(--brand);font-size:15px;margin-bottom:8px}
.contact-item p{color:#3d3833;font-size:15px}
.contact-item a:hover{color:var(--gold)}

/* 页脚 */
.footer{background:var(--brand);color:#fff;padding:44px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer-logo{height:40px;width:auto}
.footer-meta{text-align:right;font-size:14px}
.footer-small{margin-top:6px;font-size:12.5px;color:rgba(255,255,255,.6)}
.footer-small span{margin-left:14px}
.footer-icp{display:inline-block}
.footer-icp a:hover{color:var(--gold)}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1024px){
  .hero-title{font-size:44px}
  .cards-4{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .ind-grid{grid-template-columns:repeat(3,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .section{padding:72px 0}
}

/* ---------- 响应式：手机 / 微信内 H5 ---------- */
@media (max-width:768px){
  .nav-inner{height:60px}
  .nav-toggle{display:block}
  .nav-links{position:fixed;top:60px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;gap:0;padding:8px 24px 20px;box-shadow:0 12px 24px rgba(0,0,0,.1);
    transform:translateY(-140%);transition:transform .3s;max-height:calc(100vh - 60px);overflow:auto}
  .nav-links.open{transform:translateY(0)}
  .nav-links>a{color:var(--brand) !important;padding:14px 0;border-bottom:1px solid var(--line);font-size:16px}
  .btn-console{text-align:center;margin-top:14px;border-bottom:0 !important}
  .lang-switch{margin-top:14px;border-color:var(--line);color:var(--brand);align-self:flex-start}
  .hero{min-height:auto}
  .hero-inner{padding:110px 24px 64px}
  .hero-title{font-size:33px;letter-spacing:1px}
  .hero-sub{font-size:15.5px;margin:18px 0 28px}
  .hero-badges{margin-top:32px;gap:8px}
  .hero-badges span{font-size:12px;padding:5px 11px}
  .sec-title{font-size:25px;margin-bottom:32px}
  .cards-4,.cards-2,.service-row,.contact-grid{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .stat b{font-size:32px}
  .section{padding:56px 0}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .footer-meta{text-align:left}
  .footer-small span{margin:4px 14px 0 0;display:block}
}