/* ============================================================
   英哲数科 · 企业官网设计系统（子集复刻）
   用途：数电票票税协同 POC 售前演示页（scenarios 二级页）
   来源：yingzihe.com/assets/css/style.css?v=20260928e 的 :root 与组件规则
   说明：本文件仅复刻演示页所需组件。集成进官网时，可直接沿用官网原 style.css，
         路径一致（../assets/css/style.css），无需改动页面。
   设计语言：工业深蓝 · 工程图纸网格 / DIN 数字 / 合同质感
   ============================================================ */

:root{
  --c-primary:#0E3A66;
  --c-primary-light:#1B5A94;
  --c-primary-deep:#0A2B4C;
  --c-accent:#00A3B4;
  --c-accent-soft:rgba(0,163,180,.10);
  --c-emphasis:#E8A33D;
  --c-bg:#FFFFFF;
  --c-bg-alt:#F4F7FA;
  --c-text:#1F2937;
  --c-text-2:#6B7280;
  --c-line:#E5E9F0;
  --c-white:#FFFFFF;

  /* 语义色（演示页新增，取自官网内联装饰色，克制使用） */
  --c-ok:#0E9F6E;
  --c-warn:#E8A33D;
  --c-risk:#C0392B;

  --shadow-sm:0 1px 3px rgba(14,58,102,.08);
  --shadow-md:0 6px 24px -8px rgba(14,58,102,.16);
  --shadow-lg:0 16px 48px -12px rgba(14,58,102,.22);
  --radius:10px;
  --radius-lg:16px;
  --container:1080px;
  --ease:cubic-bezier(.22,.8,.32,1);
  --font-body:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Bahnschrift","DIN Alternate","Franklin Gothic Medium","Arial Narrow",sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-body);font-size:16px;line-height:1.75;
  color:var(--c-text);background:var(--c-bg);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
h1,h2,h3,h4,p{margin:0}
.num,.stat-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.01em}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------------- 顶部信息栏 ---------------- */
.topbar{background:var(--c-primary);color:rgba(255,255,255,.92);font-size:13px;position:relative}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;min-height:46px;gap:16px;padding:6px 0}
.topbar-brand{display:flex;align-items:center;gap:12px;min-width:0}
.topbar-logo img{height:26px;width:auto}
.topbar-name{font-weight:600;letter-spacing:.04em;white-space:nowrap}
.topbar-slogan{color:rgba(255,255,255,.55);border-left:1px solid rgba(255,255,255,.22);
  padding-left:12px;margin-left:2px;white-space:nowrap}
.topbar-actions{display:flex;align-items:center;gap:18px;flex-shrink:0;color:rgba(255,255,255,.8)}

/* ---------------- 主导航 ---------------- */
.mainnav{background:var(--c-white);border-bottom:1px solid var(--c-line);position:sticky;top:0;z-index:50}
.mainnav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.mainnav-links{display:flex;align-items:center;gap:6px;height:100%}
.mainnav-links>li{height:100%;display:flex}
.mainnav-links a.nav-item{display:inline-flex;align-items:center;gap:5px;padding:0 14px;font-size:15px;
  font-weight:500;color:var(--c-text);position:relative;height:100%;transition:color .2s}
.mainnav-links a.nav-item::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;
  background:var(--c-accent);border-radius:3px 3px 0 0;transform:scaleX(0);transition:transform .25s var(--ease)}
.mainnav-links a.nav-item:hover,.mainnav-links a.nav-item.active{color:var(--c-primary)}
.mainnav-links a.nav-item:hover::after,.mainnav-links a.nav-item.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;flex-shrink:0}
.nav-phone{display:flex;align-items:center;gap:8px;margin-left:16px}
.nav-phone svg{width:16px;height:16px;color:var(--c-primary);flex:none}
.nav-phone-lbl{display:block;font-size:11px;color:var(--c-text-2);line-height:1.25}
.nav-phone .num{font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--c-primary);letter-spacing:.04em}

/* ---------------- 按钮 ---------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;
  border-radius:8px;font-weight:600;font-size:15px;border:0;cursor:pointer;
  transition:all .22s var(--ease);font-family:inherit}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 4px 14px -4px rgba(14,58,102,.45)}
.btn-primary:hover{background:var(--c-primary-light);transform:translateY(-2px);box-shadow:0 8px 22px -6px rgba(14,58,102,.5)}
.btn-accent{background:var(--c-emphasis);color:#fff;box-shadow:0 4px 14px -4px rgba(232,163,61,.5)}
.btn-accent:hover{background:#D8922B;transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-line)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary-light)}
.btn-lg{padding:16px 36px;font-size:16px;border-radius:10px}
.btn-sm{padding:9px 18px;font-size:14px;min-height:38px}

/* ---------------- 通用 Section ---------------- */
.section{padding:88px 0}
.section.alt{background:var(--c-bg-alt)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  letter-spacing:.14em;color:var(--c-accent);margin-bottom:14px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-accent)}
.section-head.center .eyebrow::after{content:"";width:18px;height:2px;background:var(--c-accent)}
.section-head h2{font-size:clamp(26px,3vw,36px);font-weight:800;color:var(--c-primary);
  line-height:1.3;letter-spacing:.01em}
.section-head .lede{margin-top:14px;color:var(--c-text-2);font-size:16px;line-height:1.9}

/* ---------------- 页脚 ---------------- */
.footer{background:var(--c-primary-deep);color:rgba(255,255,255,.75);font-size:13.5px}
.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;padding:64px 0 48px}
.footer .f-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer .f-logo img{height:30px}
.footer .f-about{line-height:2;color:rgba(255,255,255,.6)}
.footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.04em}
.footer-col li{margin-bottom:11px}
.footer-col a{color:rgba(255,255,255,.65);transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-contact li{margin-bottom:12px;display:flex;gap:10px;align-items:flex-start;line-height:1.7}
.footer-contact svg{width:15px;height:15px;color:var(--c-accent);flex-shrink:0;margin-top:4px}
.footer-contact .fphone{font-family:var(--font-num);font-size:16px;color:#fff;letter-spacing:.04em}
.footer-contact .fphone:hover{color:var(--c-accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;
  flex-wrap:wrap;gap:10px 26px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.45)}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:#fff}

/* ---------------- 响应式 ---------------- */
@media (max-width:960px){
  .mainnav-links{display:none}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px}
  .section{padding:64px 0}
  .topbar-slogan{display:none}
}
@media (max-width:640px){
  .footer-main{grid-template-columns:1fr;gap:30px}
  .container{padding:0 18px}
  .topbar-name{display:none}
}