/* ==========================================================================
   base.css · 全站公共基础样式
   magformersworld.cn 豫安特种作业咨询服务中心
   定位：红黑力量感 + 高亮点缀 · 统一导航/页脚/动效/按钮/面包屑
   说明：本文件为全站公共样式（reset、变量、导航、页脚、通用动效等）。
         每个页面另有专属样式文件 css/p-页面名.css，负责该页独有布局。
   引用顺序：<link rel="stylesheet" href="./css/base.css">
             <link rel="stylesheet" href="./css/p-页面名.css">
   ========================================================================== */

/* ---------- 1. Reset 与基础 ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Noto Sans SC",Arial,sans-serif;
  font-size:16px;line-height:1.75;color:#D9DBE0;
  background:#0B0B0E;overflow-x:hidden;-webkit-font-smoothing:antialiased;
  animation:pageIn .55s ease both; /* 全站页面切换过渡 */
}
@keyframes pageIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
img{max-width:100%;display:block;border:0}
a{text-decoration:none;color:inherit;transition:color .25s ease}
ul,ol{list-style:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,select,textarea{font:inherit;color:inherit}
::selection{background:#E0261D;color:#fff}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:#0B0B0E}
::-webkit-scrollbar-thumb{background:linear-gradient(#3A3A42,#26262C);border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:#E0261D}

/* ---------- 2. 设计变量（红黑力量感 + 高亮点缀） ---------- */
:root{
  --red:#E0261D;            /* 主红 */
  --red-deep:#A90F0A;       /* 深红 */
  --red-soft:#FF3B30;       /* 亮红点缀 */
  --gold:#FFB800;           /* 金色高亮点缀 */
  --gold-soft:#FFD75E;
  --black:#0B0B0E;
  --bg:#0E0E13;
  --card:#16161D;
  --card-2:#1D1D26;
  --line:#282830;
  --line-2:#34343E;
  --text:#D9DBE0;
  --muted:#9AA0A8;
  --muted-2:#6E737B;
  --radius:14px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-red:0 14px 34px rgba(224,38,29,.28);
  --nav-h:78px;
}

/* ---------- 3. 通用布局 ---------- */
.wrap{width:min(1240px,92%);margin:0 auto}
.sec{padding:84px 0}
.center{text-align:center}
/* 内页顶部安全区：避开固定导航（顶部信息条36px + 主导航78px） */
.page-top{padding-top:132px}
@media (max-width:1024px){.page-top{padding-top:96px}}

/* ---------- 4. 顶部信息条 ---------- */
.nav-top{background:#050507;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.nav-top-inner{width:min(1240px,92%);margin:0 auto;display:flex;justify-content:space-between;align-items:center;height:36px}
.nav-top-text{display:flex;align-items:center;gap:8px;color:#C6CAD0}
.nav-top-text svg{width:15px;height:15px;fill:var(--gold);flex-shrink:0}
.nav-top-contact{display:flex;gap:18px}
.nav-top-contact a{display:inline-flex;align-items:center;gap:6px;color:#C6CAD0}
.nav-top-contact a:hover{color:var(--gold)}

/* ---------- 5. 主导航（固定 + 滚动变色 + 下拉 + 汉堡） ---------- */
.site-nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(11,11,14,.86);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:background .3s,border-color .3s,box-shadow .3s}
.site-nav.scrolled{background:rgba(8,8,11,.96);border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(0,0,0,.5)}
.nav-main{width:min(1240px,92%);margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.nav-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-logo img{height:46px;width:auto}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-link{display:block;padding:8px 13px;font-size:15px;color:#E8EAEE;position:relative}
.nav-link::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:linear-gradient(90deg,var(--red),var(--gold));transform:scaleX(0);transform-origin:left;transition:transform .28s ease}
.nav-link:hover,.nav-item.current .nav-link{color:var(--gold)}
.nav-link:hover::after,.nav-item.current .nav-link::after{transform:scaleX(1)}
.nav-item.has-drop .nav-link::before{content:"";display:inline-block;width:5px;height:5px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(45deg);margin:0 0 2px 6px;transition:transform .25s}
.nav-item.has-drop:hover .nav-link::before{transform:rotate(225deg);margin-bottom:-2px}
.drop{position:absolute;top:calc(100% + 14px);left:50%;transform:translate(-50%,8px);min-width:190px;background:#121218;border:1px solid var(--line);border-top:2px solid var(--red);border-radius:10px;padding:8px;opacity:0;visibility:hidden;transition:all .24s ease;box-shadow:var(--shadow);z-index:99}
.drop a{display:block;padding:9px 14px;font-size:14px;color:#C9CDD3;border-radius:6px}
.drop a:hover{background:linear-gradient(90deg,rgba(224,38,29,.16),transparent);color:#fff;transform:translateX(3px)}
.nav-item.has-drop:hover .drop{opacity:1;visibility:visible;transform:translate(-50%,0)}
.drop-col{min-width:236px;display:grid;grid-template-columns:1fr 1fr}
.drop-col a{white-space:nowrap}
.nav-cta{display:inline-flex;align-items:center;gap:8px;margin-left:10px;padding:10px 20px;background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;font-size:14px;font-weight:700;border-radius:999px;box-shadow:var(--shadow-red);transition:transform .25s,box-shadow .25s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(224,38,29,.42);color:#fff}
.nav-burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:9px;border-radius:8px;border:1px solid var(--line)}
.nav-burger span{display:block;height:2px;width:100%;background:#E8EAEE;border-radius:2px;transition:all .3s}
.nav-burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.on span:nth-child(2){opacity:0}
.nav-burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 6. 页脚（统一；备案号行仅首页保留） ---------- */
.site-footer{background:#070709;border-top:1px solid var(--line);position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background:radial-gradient(620px 320px at 18% 0%,rgba(224,38,29,.09),transparent 62%)}
.footer-inner{width:min(1240px,92%);margin:0 auto;position:relative;padding:64px 0 30px}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1.2fr 1fr 1.6fr;gap:36px}
.footer-brand p{font-size:13.5px;color:var(--muted);margin-top:14px;max-width:310px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;position:relative;padding-left:12px}
.footer-col h4::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:4px;background:linear-gradient(var(--red),var(--gold));border-radius:2px}
.footer-col a{display:block;font-size:13.5px;color:var(--muted);padding:5px 0;transition:all .22s}
.footer-col a:hover{color:var(--gold);transform:translateX(3px)}
.footer-contact p{font-size:13.5px;color:var(--muted);padding:4px 0}
.footer-contact .btn-red{margin-top:14px}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--muted-2)}
.footer-icp{color:var(--muted-2)}
html.menu-open{overflow:hidden}

/* ---------- 7. 按钮 ---------- */
.btn-red{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff!important;font-size:15px;font-weight:700;border-radius:999px;box-shadow:var(--shadow-red);transition:all .28s}
.btn-red:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(224,38,29,.45);color:#fff}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border:1.5px solid var(--line-2);color:#E8EAEE;font-size:15px;font-weight:600;border-radius:999px;transition:all .28s;background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-3px)}
.btn-sm{padding:9px 20px;font-size:13.5px}

/* ---------- 8. 面包屑 ---------- */
.crumb{font-size:13px;color:var(--muted);display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--gold)}
.crumb .sep{color:var(--muted-2)}

/* ---------- 9. 滚动渐入动效 ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

/* ---------- 10. 返回顶部 ---------- */
.to-top{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:12px;background:#14141A;border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(14px);transition:all .3s;z-index:900;color:var(--gold)}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red);color:#fff;border-color:var(--red)}
.to-top svg{width:20px;height:20px}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px 24px}
}
@media (max-width:1024px){
  .nav-top{display:none}
  .nav-burger{display:flex}
  .nav-menu{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:#0E0E13;border-left:1px solid var(--line);flex-direction:column;align-items:stretch;padding:88px 22px 30px;transform:translateX(102%);transition:transform .34s cubic-bezier(.22,.61,.36,1);overflow-y:auto;z-index:1001}
  .nav-menu.open{transform:none;box-shadow:-18px 0 50px rgba(0,0,0,.55)}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item .nav-link{padding:12px 6px;font-size:16px;border-bottom:1px solid var(--line)}
  .drop{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;border-radius:0;background:transparent;padding:2px 0 4px 14px;display:none}
  .nav-item.has-drop.open .drop{display:block}
  .drop-col{display:block;min-width:0}
  .nav-cta{margin:18px 0 0;justify-content:center}
}
@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center}
  .sec{padding:60px 0}
  .to-top{right:16px;bottom:20px;width:42px;height:42px}
}