/* ============================================================
   yikeyichi.com · 依客一驰 特种作业考证咨询
   css/base.css —— 全站共享设计系统（禅意茶文化风）
   墨绿 + 米白 + 浅棕；所有页面统一引用本文件，
   页面专属样式一律写在各自 css/<页面名>.css 中。
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  /* 墨绿主色系 */
  --green-950:#1B2A21;
  --green-900:#22392E;
  --green-800:#2C4A3A;
  --green-700:#3A5C48;
  --green-600:#4C725A;
  --green-500:#64896E;
  /* 米白底 */
  --cream-50:#FBF8F1;
  --cream-100:#F5F0E4;
  --cream-200:#ECE4D2;
  --cream-300:#DED2B8;
  /* 浅棕点缀 */
  --brown-500:#B08D66;
  --brown-600:#9C7B58;
  --brown-700:#7E6244;
  --brown-800:#5F4A33;
  /* 文字 */
  --ink:#26241E;
  --ink-soft:#5C574B;
  --muted:#8A8476;
  --line:rgba(34,57,46,.14);
  --line-strong:rgba(34,57,46,.30);
  --white:#FFFFFF;
  /* 阴影 */
  --shadow-sm:0 6px 18px rgba(34,57,46,.08);
  --shadow-md:0 14px 34px rgba(34,57,46,.12);
  --shadow-lg:0 26px 60px rgba(34,57,46,.18);
  /* 圆角 */
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:26px;
  --radius-round:999px;
  /* 字体 */
  --font-serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Microsoft JhengHei",sans-serif;
  /* 布局 */
  --container:1200px;
  --header-h:86px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  font-family:var(--font-sans);
  background:var(--cream-50);
  color:var(--ink);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{ /* 页面切换淡入过渡 */
  content:""; position:fixed; inset:0; z-index:9999; pointer-events:none;
  background:var(--cream-50); animation:pageIn .5s var(--ease) forwards;
}
@keyframes pageIn{ from{ opacity:1; } to{ opacity:0; } }
img{ max-width:100%; height:auto; display:block; border:0; }
a{ color:inherit; text-decoration:none; transition:color .3s var(--ease); }
ul,ol{ list-style:none; }
h1,h2,h3,h4,h5,h6{ font-family:var(--font-serif); font-weight:700; line-height:1.35; color:var(--green-900); }
h1{ font-size:clamp(30px,4.4vw,54px); }
h2{ font-size:clamp(24px,3.2vw,38px); }
h3{ font-size:clamp(19px,2.2vw,26px); }
h4{ font-size:18px; }
p{ color:var(--ink-soft); }
button{ font-family:inherit; border:0; background:none; cursor:pointer; }
input,select,textarea{ font-family:inherit; font-size:15px; }
::selection{ background:var(--green-800); color:var(--cream-50); }
:focus-visible{ outline:2px solid var(--brown-500); outline-offset:3px; border-radius:2px; }
@media (prefers-reduced-motion:reduce){
  *{ animation-duration:.001s !important; transition-duration:.001s !important; }
  html{ scroll-behavior:auto; }
}

/* ---------- 布局容器 ---------- */
.container{ width:min(var(--container),92%); margin-inline:auto; }
.section{ padding:clamp(56px,8vw,104px) 0; position:relative; }
.section-head{ margin-bottom:clamp(30px,4.6vw,54px); }
.section-head .eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-size:13px; letter-spacing:.32em; color:var(--brown-600);
  text-transform:uppercase; margin-bottom:14px;
}
.section-head .eyebrow::before{ content:""; width:34px; height:1px; background:var(--brown-500); }
.section-head h2{ margin-bottom:12px; }
.section-head .sub{ max-width:680px; color:var(--muted); font-size:15.5px; }
.section-head.center{ text-align:center; }
.section-head.center .eyebrow::after{ content:""; width:34px; height:1px; background:var(--brown-500); }
.section-head.center .sub{ margin-inline:auto; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:14px 30px; border-radius:var(--radius-round);
  font-size:15px; font-weight:600; letter-spacing:.06em; line-height:1;
  transition:all .35s var(--ease); position:relative; overflow:hidden;
  white-space:nowrap;
}
.btn svg{ width:18px; height:18px; flex:none; }
.btn-primary{ background:var(--green-800); color:var(--cream-50); box-shadow:0 10px 22px rgba(44,74,58,.28); }
.btn-primary:hover{ background:var(--green-700); transform:translateY(-3px); box-shadow:0 16px 30px rgba(44,74,58,.34); }
.btn-line{ border:1.5px solid var(--green-800); color:var(--green-800); background:transparent; }
.btn-line:hover{ background:var(--green-800); color:var(--cream-50); transform:translateY(-3px); }
.btn-ghost{ border:1.5px solid rgba(251,248,241,.6); color:var(--cream-50); background:rgba(27,42,33,.16); backdrop-filter:blur(4px); }
.btn-ghost:hover{ background:var(--cream-50); color:var(--green-900); }
.btn-brown{ background:var(--brown-600); color:var(--cream-50); }
.btn-brown:hover{ background:var(--brown-700); transform:translateY(-3px); }
.btn-sm{ padding:10px 20px; font-size:13.5px; }
.btn-lg{ padding:17px 38px; font-size:16px; }
.btn-block{ width:100%; }

/* ---------- 标签/徽章 ---------- */
.tag{
  display:inline-flex; align-items:center; gap:6px;
  padding:5px 14px; border-radius:var(--radius-round);
  font-size:12.5px; letter-spacing:.12em; font-weight:600;
  background:rgba(176,141,102,.14); color:var(--brown-700);
  border:1px solid rgba(176,141,102,.34);
}
.tag.green{ background:rgba(44,74,58,.10); color:var(--green-700); border-color:rgba(44,74,58,.26); }
.tag.cream{ background:var(--cream-100); color:var(--green-800); border-color:var(--line); }

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-size:13.5px; color:var(--muted);
}
.breadcrumb a{ color:var(--green-700); }
.breadcrumb a:hover{ color:var(--brown-600); }
.breadcrumb i{ font-style:normal; color:var(--line-strong); }
.breadcrumb .cur{ color:var(--ink-soft); }

/* ---------- 顶部导航（固定 + 滚动变色） ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  height:var(--header-h);
  background:rgba(251,248,241,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .4s var(--ease),box-shadow .4s var(--ease),height .4s var(--ease);
}
.site-header.scrolled{
  background:rgba(244,239,228,.97);
  box-shadow:0 12px 30px rgba(34,57,46,.10);
  height:70px;
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; height:100%; gap:20px; }
.brand{ display:flex; align-items:center; gap:12px; flex:none; }
.brand img{ width:52px; height:52px; object-fit:contain; transition:width .35s var(--ease),height .35s var(--ease); }
.site-header.scrolled .brand img{ width:44px; height:44px; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-family:var(--font-serif); font-size:21px; color:var(--green-900); letter-spacing:.08em; }
.brand-text i{ font-style:normal; font-size:11.5px; color:var(--brown-600); letter-spacing:.34em; margin-top:3px; }

.site-nav{ display:flex; align-items:center; gap:6px; }
.nav-list{ display:flex; align-items:center; gap:4px; }
.nav-list > li{ position:relative; }
.nav-list > li > a{
  display:block; padding:10px 14px; font-size:15px; font-weight:500;
  color:var(--ink-soft); border-radius:var(--radius-s); letter-spacing:.03em;
}
.nav-list > li > a:hover{ color:var(--green-800); }
.nav-list > li > a.active{ color:var(--green-800); font-weight:700; }
.nav-list > li > a.active::after{
  content:""; position:absolute; left:14px; right:14px; bottom:4px; height:2px;
  background:var(--brown-500); border-radius:2px;
}
.sub-toggle{ display:none; }
/* 下拉菜单（桌面 hover） */
.sub-menu{
  position:absolute; top:calc(100% + 10px); left:0; min-width:196px;
  background:var(--cream-50); border:1px solid var(--line); border-radius:var(--radius-m);
  box-shadow:var(--shadow-md); padding:10px;
  opacity:0; visibility:hidden; transform:translateY(12px);
  transition:all .32s var(--ease); z-index:50;
}
.sub-menu::before{ content:""; position:absolute; top:-10px; left:0; right:0; height:10px; }
.has-sub:hover .sub-menu{ opacity:1; visibility:visible; transform:translateY(0); }
.sub-menu li a{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding:9px 14px; border-radius:var(--radius-s); font-size:14px; color:var(--ink-soft);
}
.sub-menu li a:hover{ background:rgba(44,74,58,.08); color:var(--green-800); }
.sub-menu li a::after{ content:"↗"; font-size:11px; color:var(--brown-500); opacity:0; transition:opacity .3s; }
.sub-menu li a:hover::after{ opacity:1; }
.nav-cta{ margin-left:10px; }
.nav-toggle{ display:none; flex-direction:column; gap:5px; padding:10px; z-index:1100; }
.nav-toggle span{ width:26px; height:2px; background:var(--green-900); border-radius:2px; transition:all .35s var(--ease); }
body.nav-open .nav-toggle span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2){ opacity:0; }
body.nav-open .nav-toggle span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.site-footer{ background:var(--green-950); color:rgba(251,248,241,.72); margin-top:0; }
.footer-top{
  display:grid; grid-template-columns:1.35fr 1fr 1fr 1.15fr; gap:clamp(24px,4vw,52px);
  padding:clamp(52px,7vw,84px) 0 46px;
}
.footer-brand .brand img{ width:56px; height:56px; }
.footer-brand .brand-text b{ color:var(--cream-100); }
.footer-brand .brand-text i{ color:var(--brown-500); }
.footer-brand > p{ margin-top:18px; font-size:14px; line-height:2; color:rgba(251,248,241,.58); max-width:330px; }
.footer-col h4{
  font-size:16px; color:var(--cream-100); margin-bottom:18px; letter-spacing:.1em;
  position:relative; padding-bottom:10px;
}
.footer-col h4::after{ content:""; position:absolute; left:0; bottom:0; width:26px; height:2px; background:var(--brown-500); }
.footer-col ul li{ margin-bottom:9px; }
.footer-col ul a{ font-size:14px; color:rgba(251,248,241,.64); transition:all .3s var(--ease); }
.footer-col ul a:hover{ color:var(--brown-500); padding-left:6px; }
.footer-contact li{
  font-size:14px; color:rgba(251,248,241,.72); margin-bottom:11px;
  display:flex; gap:8px; align-items:flex-start;
}
.footer-contact li svg{ width:16px; height:16px; flex:none; margin-top:5px; color:var(--brown-500); }
.footer-col .btn{ margin-top:16px; }
.footer-bottom{ border-top:1px solid rgba(251,248,241,.10); padding:20px 0; }
.footer-bottom .container{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:8px;
  font-size:13px; color:rgba(251,248,241,.44);
}
.footer-bottom a{ color:rgba(251,248,241,.6); }
.footer-bottom a:hover{ color:var(--brown-500); }

/* ---------- 滚动渐入动画 ---------- */
.reveal{ opacity:0; transform:translateY(34px); transition:opacity .8s var(--ease),transform .8s var(--ease); }
.reveal-left{ opacity:0; transform:translateX(-46px); transition:opacity .8s var(--ease),transform .8s var(--ease); }
.reveal-right{ opacity:0; transform:translateX(46px); transition:opacity .8s var(--ease),transform .8s var(--ease); }
.reveal-scale{ opacity:0; transform:scale(.92); transition:opacity .8s var(--ease),transform .8s var(--ease); }
.in-view{ opacity:1; transform:none; }

/* ---------- 回到顶部 ---------- */
#backTop{
  position:fixed; right:26px; bottom:30px; z-index:900;
  width:50px; height:50px; border-radius:50%;
  background:var(--green-800); color:var(--cream-50);
  display:flex; align-items:center; justify-content:center;
  box-shadow:var(--shadow-md); opacity:0; visibility:hidden; transform:translateY(16px);
  transition:all .4s var(--ease);
}
#backTop.show{ opacity:1; visibility:visible; transform:none; }
#backTop:hover{ background:var(--brown-600); transform:translateY(-4px); }
#backTop svg{ width:20px; height:20px; }

/* ---------- 表单 ---------- */
.field{ display:flex; flex-direction:column; gap:8px; }
.field label{ font-size:13.5px; font-weight:600; color:var(--green-800); letter-spacing:.04em; }
.field input,.field select,.field textarea{
  width:100%; padding:13px 16px; border:1.5px solid var(--line-strong);
  border-radius:var(--radius-s); background:var(--cream-50);
  color:var(--ink); transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--green-600); box-shadow:0 0 0 4px rgba(76,114,90,.12);
}
.field textarea{ min-height:120px; resize:vertical; }
.field .hint{ font-size:12.5px; color:var(--muted); }
.form-toast{
  position:fixed; left:50%; bottom:44px; transform:translate(-50%,20px);
  background:var(--green-900); color:var(--cream-50); font-size:14.5px;
  padding:14px 26px; border-radius:var(--radius-round); box-shadow:var(--shadow-lg);
  z-index:2000; opacity:0; transition:all .45s var(--ease); max-width:88vw; text-align:center;
}
.form-toast.show{ opacity:1; transform:translate(-50%,0); }

/* ---------- 表格 ---------- */
.tbl{ width:100%; border-collapse:collapse; font-size:14.5px; }
.tbl th{
  background:var(--green-900); color:var(--cream-100); text-align:left;
  padding:13px 16px; font-weight:600; letter-spacing:.05em;
}
.tbl td{ padding:13px 16px; border-bottom:1px solid var(--line); color:var(--ink-soft); }
.tbl tbody tr{ transition:background .3s var(--ease); }
.tbl tbody tr:hover{ background:rgba(176,141,102,.08); }

/* ---------- 通用工具 ---------- */
.text-green{ color:var(--green-700) !important; }
.text-brown{ color:var(--brown-600) !important; }
.bg-cream{ background:var(--cream-100); }
.bg-deep{ background:var(--green-900); }
.bg-deep h2,.bg-deep h3,.bg-deep h4{ color:var(--cream-100); }
.bg-deep p{ color:rgba(251,248,241,.72); }
.mt-0{margin-top:0}.mt-1{margin-top:12px}.mt-2{margin-top:24px}.mt-3{margin-top:40px}.mt-4{margin-top:60px}
.mb-1{margin-bottom:12px}.mb-2{margin-bottom:24px}.mb-3{margin-bottom:40px}.mb-4{margin-bottom:60px}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .footer-top{ grid-template-columns:1.2fr 1fr 1fr; }
  .footer-col:last-child{ grid-column:1 / -1; }
}
@media (max-width:1024px){
  .nav-toggle{ display:flex; }
  .site-nav{
    position:fixed; top:0; right:0; bottom:0; width:min(360px,86vw);
    background:var(--cream-50); flex-direction:column; align-items:stretch;
    justify-content:flex-start; gap:0; padding:calc(var(--header-h) + 10px) 22px 30px;
    box-shadow:var(--shadow-lg); transform:translateX(100%);
    transition:transform .45s var(--ease); overflow-y:auto;
  }
  body.nav-open .site-nav{ transform:none; }
  .nav-list{ flex-direction:column; align-items:stretch; width:100%; }
  .nav-list > li > a{ padding:14px 10px; font-size:16px; border-bottom:1px solid var(--line); border-radius:0; }
  .nav-list > li > a.active::after{ display:none; }
  .nav-list > li > a.active{ color:var(--brown-600); }
  .has-sub{ display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; }
  .has-sub > a{ flex:1; }
  .sub-toggle{
    display:flex; align-items:center; justify-content:center;
    width:42px; height:42px; color:var(--green-800);
  }
  .sub-toggle svg{ width:16px; height:16px; transition:transform .35s var(--ease); }
  .sub-menu{
    position:static; width:100%; opacity:1; visibility:visible; transform:none;
    box-shadow:none; border:0; padding:0 6px 8px 16px;
    max-height:0; overflow:hidden; padding-block:0;
    transition:max-height .45s var(--ease);
  }
  .has-sub.open .sub-menu{ max-height:420px; padding-block:8px; }
  .has-sub.open .sub-toggle svg{ transform:rotate(180deg); }
  .nav-cta{ margin:22px 0 0; }
  .footer-top{ grid-template-columns:1fr 1fr; }
}
@media (max-width:640px){
  :root{ --header-h:74px; }
  .brand img{ width:44px; height:44px; }
  .brand-text b{ font-size:18px; }
  .brand-text i{ letter-spacing:.22em; }
  .footer-top{ grid-template-columns:1fr; gap:30px; }
  .footer-bottom .container{ flex-direction:column; align-items:flex-start; }
  #backTop{ right:16px; bottom:20px; width:44px; height:44px; }
}