/* ============================================================
   dksg.cn · 洛阳八大员资质服务
   css/base.css —— 全站共享基础层（键盘复古风）
   色板：米黄 #F2E8D5 / 墨黑 #1C1A17 / 深棕 #4A3728
   本文件只承载：设计令牌、重置、版式基元、统一导航、统一页脚、
   按钮、键帽装饰、滚动渐入动效。
   每个页面的独立板块样式一律写在 css/<页面名>.css 中，禁止内联。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root{
  --paper:    #F2E8D5;   /* 米黄主底 */
  --paper-2:  #EAE0C8;   /* 米黄次级底 */
  --paper-3:  #DFD1B4;   /* 米黄三级底 */
  --ink:      #1C1A17;   /* 墨黑主色 */
  --ink-2:    #2B2721;   /* 墨黑次级 */
  --ink-3:    #3B342C;   /* 墨黑三级 */
  --brown:    #4A3728;   /* 深棕主色 */
  --brown-2:  #5C4633;   /* 深棕次级 */
  --brown-3:  #79593D;   /* 深棕三级 */
  --tan:      #B99E70;   /* 棕褐点缀 */
  --line:     #C9B998;   /* 描边线 */
  --line-2:   #B3A17E;   /* 深描边线 */
  --cream:    #F2E8D5;   /* 深底上的米黄文字 */
  --shadow:   0 12px 32px rgba(28,26,23,.14);
  --shadow-sm:0 6px 16px rgba(28,26,23,.10);
  --r-s: 8px;  --r-m: 14px;  --r-l: 22px;
  --font-body:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",sans-serif;
  --font-head:Georgia,"Songti SC","SimSun","STSong","Noto Serif SC",serif;
  --font-mono:Consolas,"Courier New",monospace;
  --nav-h:74px;
}

/* ---------- 重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink-2);
  line-height:1.75;
  font-size:15px;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; border:0; }
ul,ol{ list-style:none; }
a{ color:inherit; text-decoration:none; transition:color .25s ease; }
a:hover{ color:var(--brown-3); }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
input,select,textarea{ font:inherit; color:inherit; }
h1,h2,h3,h4,h5,h6{ font-family:var(--font-head); color:var(--ink); line-height:1.3; font-weight:700; }
::selection{ background:var(--brown); color:var(--cream); }
:focus-visible{ outline:2px solid var(--brown-3); outline-offset:2px; }
::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background:var(--paper-2); }
::-webkit-scrollbar-thumb{ background:var(--line-2); border-radius:6px; border:2px solid var(--paper-2); }
::-webkit-scrollbar-thumb:hover{ background:var(--brown-3); }

/* ---------- 版式基元 ---------- */
.wrap{ max-width:1260px; margin:0 auto; padding:0 24px; }
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }
main{ display:block; }

/* 面包屑 */
.crumb{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-size:13px; color:var(--brown-3);
}
.crumb a{ color:var(--brown-3); }
.crumb a:hover{ color:var(--ink); }
.crumb i{ font-style:normal; color:var(--line-2); }

/* ---------- 顶部固定导航 ---------- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:999;
  height:var(--nav-h);
  background:rgba(242,232,213,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background .35s ease,border-color .35s ease,box-shadow .35s ease;
}
.nav-inner{ height:var(--nav-h); display:flex; align-items:center; justify-content:space-between; gap:20px; }
/* 滚动变色：进入墨黑 */
.nav.scrolled{
  background:rgba(28,26,23,.97);
  border-bottom-color:rgba(242,232,213,.12);
  box-shadow:0 8px 28px rgba(28,26,23,.28);
}
.brand{ display:inline-flex; align-items:center; gap:10px; flex:none; }
.brand-logo{ width:46px; height:46px; object-fit:contain; }
.brand-name{
  font-family:var(--font-head); font-size:20px; font-weight:700; color:var(--ink);
  display:flex; flex-direction:column; line-height:1.2; letter-spacing:1px;
}
.brand-name small{ font-family:var(--font-mono); font-size:9px; letter-spacing:2px; color:var(--brown-3); font-weight:400; }
.nav.scrolled .brand-name{ color:var(--cream); }
.nav.scrolled .brand-name small{ color:var(--tan); }

/* 菜单 */
.nav-menu{ display:flex; align-items:center; gap:4px; }
.nav-menu > li{ position:relative; }
.nav-menu > li > a{
  display:inline-block; padding:10px 13px; font-size:14.5px; font-weight:600;
  color:var(--ink-2); letter-spacing:.5px; position:relative;
}
.nav-menu > li > a::after{
  content:""; position:absolute; left:13px; right:13px; bottom:6px; height:2px;
  background:var(--brown-3); transform:scaleX(0); transform-origin:left;
  transition:transform .3s ease;
}
.nav-menu > li > a:hover::after,
.nav-menu > li > a.active::after{ transform:scaleX(1); }
.nav-menu > li > a.active{ color:var(--brown-2); }
.nav.scrolled .nav-menu > li > a{ color:var(--cream); }
.nav.scrolled .nav-menu > li > a:hover,
.nav.scrolled .nav-menu > li > a.active{ color:var(--tan); }
.nav.scrolled .nav-menu > li > a::after{ background:var(--tan); }

/* 下拉 */
.drop-caret{
  display:none; position:absolute; right:2px; top:50%; transform:translateY(-50%);
  width:26px; height:26px; align-items:center; justify-content:center;
  color:var(--ink-2); border-radius:6px;
}
.nav.scrolled .drop-caret{ color:var(--cream); }
.drop{
  position:absolute; top:calc(100% + 8px); left:6px; min-width:186px;
  background:var(--paper); border:1px solid var(--line); border-radius:12px;
  padding:8px; box-shadow:var(--shadow);
  opacity:0; visibility:hidden; transform:translateY(10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s;
  z-index:100;
}
.has-drop:hover > .drop,
.has-drop.drop-open > .drop{ opacity:1; visibility:visible; transform:translateY(0); }
.drop a{
  display:block; padding:9px 14px; border-radius:8px; font-size:14px; color:var(--ink-2);
}
.drop a:hover{ background:var(--paper-3); color:var(--brown-2); }
.nav.scrolled .drop{ background:var(--paper); }
.nav.scrolled .drop a{ color:var(--ink-2); }

/* CTA 按钮位 */
.nav-cta{ margin-left:10px; }

/* 汉堡 */
.nav-toggle{
  display:none; width:44px; height:44px; flex-direction:column;
  align-items:center; justify-content:center; gap:5px; border-radius:10px;
  border:1px solid var(--line); background:var(--paper-2);
}
.nav-toggle span{ width:20px; height:2px; background:var(--ink); border-radius:2px; transition:transform .3s ease,opacity .3s ease; }
.nav-toggle.on span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.on span:nth-child(2){ opacity:0; }
.nav-toggle.on span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* 移动端导航面板 */
@media (max-width:1080px){
  .nav-toggle{ display:flex; }
  .nav-menu{
    position:fixed; top:var(--nav-h); left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:var(--paper); border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    padding:10px 20px 18px;
    max-height:calc(100vh - var(--nav-h)); overflow:auto;
    opacity:0; visibility:hidden; transform:translateY(-8px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s;
  }
  .nav.open .nav-menu{ opacity:1; visibility:visible; transform:none; }
  .nav-menu > li > a{ width:100%; padding:13px 6px; font-size:15.5px; }
  .nav-menu > li > a::after{ display:none; }
  .drop-caret{ display:inline-flex; }
  .has-drop{ display:flex; flex-wrap:wrap; align-items:center; }
  .has-drop > a{ flex:1; }
  .drop{
    position:static; min-width:0; width:100%; margin:4px 0 6px 10px;
    opacity:1; visibility:hidden; transform:none; display:none;
    box-shadow:none; background:var(--paper-2); border-radius:10px;
  }
  .has-drop.drop-open > .drop{ display:block; visibility:visible; }
  .nav-cta{ margin:12px 0 0; }
  .nav-cta .btn{ width:100%; justify-content:center; }
}

/* ---------- 统一页脚 ---------- */
.foot{
  background:var(--ink); color:rgba(242,232,213,.86);
  border-top:6px solid var(--brown-3);
  position:relative;
}
/* 页脚顶部的键帽装饰行 */
.foot-keyrow{
  display:flex; gap:14px; justify-content:center; padding:22px 0 0;
}
.foot-keyrow span{
  width:52px; height:16px; border-radius:4px;
  background:linear-gradient(180deg,#2E2A24,#191713);
  border:1px solid #3A342C;
  box-shadow:0 4px 0 #111, inset 0 -3px 0 rgba(0,0,0,.5), inset 0 2px 2px rgba(242,232,213,.12);
}
.foot-keyrow span:nth-child(even){ background:linear-gradient(180deg,#5C4633,#3E2F22); border-color:#6B5138; }
.foot-inner{ padding-top:34px; padding-bottom:20px; }
.foot-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr 1.2fr; gap:34px;
}
.foot-logo{ display:inline-flex; align-items:center; gap:10px; margin-bottom:12px; }
.foot-brand .foot-slogan{ font-size:13.5px; color:rgba(242,232,213,.66); margin-bottom:14px; max-width:280px; }
.foot-brand a{ color:var(--tan); }
.foot-brand a:hover{ color:var(--cream); }
.foot-col h4{
  color:var(--cream); font-size:15px; margin-bottom:14px; letter-spacing:1px;
  position:relative; padding-bottom:8px;
}
.foot-col h4::after{
  content:""; position:absolute; left:0; bottom:0; width:26px; height:2px; background:var(--brown-3);
}
.foot-col li{ margin-bottom:9px; }
.foot-col li a{ color:rgba(242,232,213,.72); font-size:13.5px; }
.foot-col li a:hover{ color:var(--tan); padding-left:4px; }
.foot-contact p{ font-size:13.5px; margin-bottom:8px; color:rgba(242,232,213,.72); }
.foot-bottom{
  margin-top:30px; padding-top:16px; border-top:1px solid rgba(242,232,213,.14);
  display:flex; flex-wrap:wrap; gap:10px; justify-content:space-between;
  font-size:13px; color:rgba(242,232,213,.55);
}
.foot-icp a{ color:rgba(242,232,213,.55); }
.foot-icp a:hover{ color:var(--tan); }
@media (max-width:1080px){
  .foot-grid{ grid-template-columns:1fr 1fr; gap:26px; }
}
@media (max-width:640px){
  .foot-grid{ grid-template-columns:1fr; }
  .foot-bottom{ flex-direction:column; }
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 26px; border-radius:10px;
  font-size:14.5px; font-weight:700; letter-spacing:1px;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;
  border:1px solid transparent;
}
.btn-ink{ background:var(--ink); color:var(--cream); box-shadow:0 4px 0 #000; }
.btn-ink:hover{ background:var(--ink-2); color:var(--cream); transform:translateY(-2px); box-shadow:0 6px 0 #000; }
.btn-brown{ background:var(--brown); color:var(--cream); box-shadow:0 4px 0 #2A1E13; }
.btn-brown:hover{ background:var(--brown-2); color:var(--cream); transform:translateY(-2px); box-shadow:0 6px 0 #2A1E13; }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line-2); }
.btn-ghost:hover{ border-color:var(--brown-3); color:var(--brown-3); transform:translateY(-2px); }
.btn-light{ background:var(--paper); color:var(--ink); box-shadow:0 4px 0 #8F7C58; }
.btn-light:hover{ background:var(--cream); color:var(--ink); transform:translateY(-2px); }
.btn-sm{ padding:8px 18px; font-size:13px; }

/* ---------- 键帽徽章（页面小标签） ---------- */
.keycap{
  display:inline-flex; align-items:center; gap:6px;
  padding:5px 12px; border-radius:6px;
  background:var(--paper-2); border:1px solid var(--line-2);
  box-shadow:0 3px 0 var(--line-2), inset 0 -2px 0 rgba(0,0,0,.05);
  font-family:var(--font-mono); font-size:12px; letter-spacing:1px; color:var(--brown-2);
}

/* ---------- 滚动渐入 ---------- */
html.js .reveal{ opacity:0; transform:translateY(28px); transition:opacity .7s ease,transform .7s ease; }
html.js .reveal-left{ opacity:0; transform:translateX(-40px); transition:opacity .7s ease,transform .7s ease; }
html.js .reveal-right{ opacity:0; transform:translateX(40px); transition:opacity .7s ease,transform .7s ease; }
html.js .reveal-zoom{ opacity:0; transform:scale(.94); transition:opacity .7s ease,transform .7s ease; }
html.js .reveal.in,html.js .reveal-left.in,html.js .reveal-right.in,html.js .reveal-zoom.in{ opacity:1; transform:none; }
html.js .d1{ transition-delay:.08s; } html.js .d2{ transition-delay:.16s; }
html.js .d3{ transition-delay:.24s; } html.js .d4{ transition-delay:.32s; }
html.js .d5{ transition-delay:.40s; } html.js .d6{ transition-delay:.48s; }
@media (prefers-reduced-motion:reduce){
  html.js .reveal,html.js .reveal-left,html.js .reveal-right,html.js .reveal-zoom{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed; right:26px; bottom:26px; z-index:980;
  width:46px; height:46px; border-radius:12px;
  background:var(--ink); color:var(--cream);
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 5px 0 #000, var(--shadow);
  opacity:0; visibility:hidden; transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s;
}
.to-top.show{ opacity:1; visibility:visible; transform:none; }
.to-top:hover{ background:var(--brown); color:var(--cream); }

/* ---------- 表格基元（各页可再定制） ---------- */
table{ width:100%; border-collapse:collapse; }
th,td{ padding:11px 14px; text-align:left; border:1px solid var(--line); vertical-align:top; }
th{ background:var(--paper-3); font-family:var(--font-head); color:var(--brown-2); }

/* ---------- 表单基元（表单页可再定制） ---------- */
.field{ margin-bottom:16px; }
.field label{ display:block; font-size:13.5px; font-weight:600; margin-bottom:6px; color:var(--ink); }
.field input,.field select,.field textarea{
  width:100%; padding:11px 14px; border:1px solid var(--line-2); border-radius:8px;
  background:var(--paper); color:var(--ink-2); transition:border-color .25s ease,box-shadow .25s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--brown-3); box-shadow:0 0 0 3px rgba(74,55,40,.14);
}
.field textarea{ resize:vertical; min-height:110px; }

/* ---------- 文章正文基元（资讯详情等页使用） ---------- */
.article-body{ font-size:15.5px; }
.article-body p{ margin-bottom:16px; }
.article-body h2,.article-body h3,.article-body h4{ margin:26px 0 12px; }
.article-body img{ margin:18px auto; border-radius:12px; }
.article-body blockquote{
  border-left:4px solid var(--brown-3); background:var(--paper-2);
  padding:12px 18px; margin:16px 0; border-radius:0 10px 10px 0; color:var(--brown-2);
}
.article-body ul,.article-body ol{ margin:12px 0 16px; padding-left:22px; }
.article-body ul li{ list-style:disc; margin-bottom:6px; }
.article-body ol li{ list-style:decimal; margin-bottom:6px; }