/* ============================================================================
   shuianchou.com · 水安筹 八大员报考咨询 · 全站共享样式 base.css
   风格：复古美式工业风（深棕 + 墨绿 + 米白 + 黄铜）
   架构：本文件承载全站基础令牌 / 排版 / 导航 / 页脚 / 按钮 / 动画 / 响应式
         各页面专属模块样式一律写入 css/<页面名>.css，禁止在 HTML 内写样式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  /* 色板 · 深棕系 */
  --brown-900:#241407;
  --brown-800:#331C0D;
  --brown-700:#452712;
  --brown-600:#5A3517;
  --brown-500:#74502A;
  --brown-300:#A07B4C;
  --brown-100:#D9C29A;
  /* 色板 · 墨绿系 */
  --green-900:#0F2118;
  --green-800:#16301F;
  --green-700:#21422B;
  --green-600:#2C553A;
  --green-500:#3A6B4C;
  --green-200:#BFD0BF;
  /* 色板 · 米白 / 黄铜 / 锈红 */
  --cream-50:#FBF7EC;
  --cream-100:#F3ECDC;
  --cream-200:#E9DFC7;
  --cream-300:#DACBA9;
  --brass:#B5893F;
  --brass-light:#D2B078;
  --rust:#A84E25;
  /* 文本 / 线条 */
  --ink:#2B2013;
  --ink-soft:#4C3E2A;
  --muted:#77664E;
  --line:#CFC1A4;
  --line-dark:#4A3A24;
  /* 阴影 */
  --shadow-sm:0 2px 8px rgba(36,20,7,.10);
  --shadow-md:0 10px 28px rgba(36,20,7,.16);
  --shadow-lg:0 22px 50px rgba(36,20,7,.22);
  /* 圆角（工业感，偏方） */
  --r-xs:2px;
  --r-sm:4px;
  --r-md:8px;
  /* 字体 */
  --font-display:Georgia,"Times New Roman","Songti SC","SimSun",serif;
  --font-body:"Segoe UI","Microsoft YaHei","PingFang SC",system-ui,-apple-system,sans-serif;
  /* 布局 */
  --container:1200px;
  --header-h:76px;
  --gutter:clamp(16px,4vw,28px);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--cream-50);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);line-height:1.22;font-weight:700;color:var(--brown-800)}
strong,b{font-weight:700}
::selection{background:var(--brass);color:var(--cream-50)}

/* 页面载入淡入（全站页面切换过渡自然） */
body{opacity:0;transition:opacity .45s ease}
body.page-loaded{opacity:1}

/* ---------- 3. 布局工具 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(56px,7vw,96px) 0;position:relative}
.section-dark{background:var(--green-900);color:var(--cream-100)}
.section-brown{background:var(--brown-800);color:var(--cream-100)}
.section-cream{background:var(--cream-100)}
.section-plain{background:var(--cream-50)}

/* 区块标题（各页可在此基础上个性化修饰，但保留结构语义） */
.sec-head{max-width:720px;margin-bottom:clamp(32px,4vw,52px)}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--brass);font-weight:600;margin-bottom:14px;
}
.sec-kicker::before{content:"";width:34px;height:2px;background:var(--brass)}
.sec-head.center .sec-kicker::after{content:"";width:34px;height:2px;background:var(--brass)}
.sec-head h2{font-size:clamp(26px,3.4vw,40px);color:var(--brown-800)}
.section-dark .sec-head h2,.section-brown .sec-head h2{color:var(--cream-50)}
.sec-head .sec-lead{color:var(--muted);margin-top:12px;font-size:16px}
.section-dark .sec-lead,.section-brown .sec-lead{color:var(--cream-200)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 28px;font-size:15px;font-weight:600;letter-spacing:.06em;
  border-radius:var(--r-sm);border:2px solid transparent;
  transition:transform .25s ease,background .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease;
  cursor:pointer;line-height:1.2;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-brass{background:var(--brass);color:var(--cream-50);border-color:var(--brass)}
.btn-brass:hover{background:var(--brass-light);border-color:var(--brass-light);box-shadow:var(--shadow-md)}
.btn-green{background:var(--green-600);color:var(--cream-50);border-color:var(--green-600)}
.btn-green:hover{background:var(--green-500);border-color:var(--green-500);box-shadow:var(--shadow-md)}
.btn-cream{background:var(--cream-100);color:var(--brown-800);border-color:var(--cream-100)}
.btn-cream:hover{background:var(--cream-50);box-shadow:var(--shadow-md)}
.btn-ghost{border-color:currentColor;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-lg{padding:16px 36px;font-size:16px}
.btn-arrow::after{content:"→";font-size:18px;transition:transform .25s ease}
.btn-arrow:hover::after{transform:translateX(4px)}

/* ---------- 5. 徽章 / 标签 ---------- */
.tag{
  display:inline-block;padding:5px 12px;font-size:12.5px;font-weight:600;
  border-radius:var(--r-xs);border:1px solid var(--line);
  color:var(--ink-soft);background:var(--cream-50);letter-spacing:.04em;
}
.tag-brass{background:var(--brass);border-color:var(--brass);color:var(--cream-50)}
.tag-green{background:var(--green-600);border-color:var(--green-600);color:var(--cream-50)}
.tag-outline-dark{border-color:var(--cream-200);color:var(--cream-100);background:transparent}
.badge-num{
  font-family:var(--font-display);font-size:15px;color:var(--brass);font-weight:700;
}

/* ---------- 6. 顶部固定导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--header-h);
  transition:background .35s ease,box-shadow .35s ease,backdrop-filter .35s ease;
  color:var(--cream-50);
}
.header-inner{
  height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-logo{width:46px;height:46px;border-radius:var(--r-sm);object-fit:cover;box-shadow:var(--shadow-sm)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text em{
  font-family:var(--font-display);font-style:normal;font-weight:700;font-size:22px;letter-spacing:.06em;
  white-space:nowrap;
}
.brand-text small{font-size:11px;letter-spacing:.28em;opacity:.85;text-transform:uppercase;white-space:nowrap}

.site-nav{display:flex;align-items:center;gap:6px}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list > li{position:relative}
.nav-link{
  display:block;padding:10px 11px;font-size:14.5px;font-weight:600;letter-spacing:.04em;
  white-space:nowrap;border-radius:var(--r-xs);transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";display:block;height:2px;width:0;background:var(--brass);
  transition:width .25s ease;margin-top:2px;
}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{width:100%}
.nav-link[aria-current="page"]{color:var(--brass-light)}
.has-sub > .nav-link::before{
  content:"▾";font-size:11px;margin-left:6px;opacity:.8;display:inline-block;
}
.submenu{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);
  min-width:200px;background:var(--cream-50);color:var(--ink);
  border:1px solid var(--line);border-top:3px solid var(--brass);
  border-radius:var(--r-sm);box-shadow:var(--shadow-md);
  padding:10px;opacity:0;visibility:hidden;transition:opacity .22s ease,transform .22s ease,visibility .22s;
  z-index:99;
}
.submenu-grid{width:520px;display:grid;grid-template-columns:repeat(2,1fr);gap:2px 14px}
.submenu a{
  display:block;padding:8px 12px;font-size:13.5px;border-radius:var(--r-xs);
  color:var(--ink-soft);white-space:nowrap;transition:background .2s ease,color .2s ease,padding-left .2s ease;
}
.submenu a:hover{background:var(--cream-100);color:var(--brown-700);padding-left:16px}
.nav-list > li:hover .submenu,.nav-list > li:focus-within .submenu{
  opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);
}
.nav-list > li:hover .submenu-grid,.nav-list > li:focus-within .submenu-grid{transform:translateX(-50%) translateY(0)}
.nav-cta{
  margin-left:10px;padding:11px 18px;border:2px solid var(--brass);border-radius:var(--r-sm);
  color:var(--cream-50);font-size:14px;font-weight:600;letter-spacing:.05em;white-space:nowrap;
  transition:background .25s ease,color .25s ease;
}
.nav-cta:hover{background:var(--brass);color:var(--cream-50)}
/* “免费咨询”仅在移动抽屉内展示，桌面端隐藏（修复其在桌面导航中泄漏占位导致折行的问题） */
.nav-mobile-cta{display:none}

/* 导航滚动变色：透明 → 米白实底 */
.site-header.scrolled{
  background:var(--cream-50);color:var(--brown-800);
  box-shadow:0 4px 18px rgba(36,20,7,.14);
}
.site-header.scrolled .brand-text em{color:var(--brown-800)}
.site-header.scrolled .nav-link{color:var(--brown-700)}
.site-header.scrolled .nav-link[aria-current="page"]{color:var(--brown-500)}
.site-header.scrolled .nav-cta{color:var(--brown-700)}
.site-header.scrolled .nav-cta:hover{color:var(--cream-50)}

/* 汉堡按钮 */
.nav-toggle{
  display:none;width:42px;height:42px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:24px;height:2px;background:currentColor;transition:transform .3s ease,opacity .3s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  background:var(--brown-900);color:var(--cream-200);
  border-top:4px solid var(--brass);position:relative;
}
.footer-top{border-bottom:1px solid var(--line-dark);padding:clamp(40px,5vw,64px) 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:clamp(24px,4vw,56px)}
.footer-brand img{width:52px;height:52px;border-radius:var(--r-sm);margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--cream-300);line-height:1.9}
.footer-col h4{
  font-size:15px;color:var(--cream-50);letter-spacing:.14em;text-transform:uppercase;
  padding-bottom:12px;margin-bottom:16px;position:relative;
}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:34px;height:2px;background:var(--brass)}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:var(--cream-300);transition:color .2s ease,padding-left .2s ease}
.footer-col ul a:hover{color:var(--brass-light);padding-left:6px}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--cream-300)}
.footer-contact svg{flex-shrink:0;margin-top:3px}
.footer-contact a:hover{color:var(--brass-light)}
.footer-bottom{padding:22px 0;display:flex;flex-wrap:wrap;gap:12px 30px;justify-content:space-between;font-size:13px;color:var(--cream-300)}
.footer-bottom a{color:var(--cream-300)}
.footer-bottom a:hover{color:var(--brass-light)}

/* 返回顶部 */
.back-top{
  position:fixed;right:22px;bottom:22px;z-index:900;
  width:46px;height:46px;border-radius:var(--r-sm);
  background:var(--brown-700);color:var(--cream-50);border:2px solid var(--brass);
  display:flex;align-items:center;justify-content:center;font-size:20px;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,background .3s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--brass)}

/* ---------- 8. 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  font-size:13px;color:var(--muted);
}
.crumb a{color:var(--cream-200);transition:color .2s}
.crumb a:hover{color:var(--brass-light)}
.crumb .sep{opacity:.6}

/* ---------- 9. 波浪曲线分隔 ---------- */
.wave-wrap{position:relative;line-height:0;overflow:hidden}
.wave-wrap svg{display:block;width:100%;height:clamp(46px,7vw,90px)}
.wave-wrap .fill-cream{fill:var(--cream-50)}
.wave-wrap .fill-cream-100{fill:var(--cream-100)}
.wave-wrap .fill-green{fill:var(--green-900)}
.wave-wrap .fill-brown{fill:var(--brown-800)}
/* 区块间反向波浪：旋转180度衔接 */
.wave-flip svg{transform:rotate(180deg)}

/* ---------- 10. 滚动渐入动画 ---------- */
.reveal,.reveal-left,.reveal-right,.reveal-zoom{
  opacity:0;transition:opacity .7s ease,transform .7s cubic-bezier(.22,.61,.36,1);
  will-change:opacity,transform;
}
.reveal{transform:translateY(34px)}
.reveal-left{transform:translateX(-46px)}
.reveal-right{transform:translateX(46px)}
.reveal-zoom{transform:scale(.94)}
.reveal.in,.reveal-left.in,.reveal-right.in,.reveal-zoom.in{opacity:1;transform:none}
/* 文字逐字上升动画（首页 hero 使用） */
.char-rise{display:inline-block;opacity:0;transform:translateY(28px);animation:charUp .6s cubic-bezier(.22,.61,.36,1) forwards}
@keyframes charUp{to{opacity:1;transform:translateY(0)}}
/* 跑马灯 */
.marquee{overflow:hidden;white-space:nowrap}
.marquee-track{display:inline-flex;animation:marquee 26s linear infinite}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 11. 表单（通用静态表单） ---------- */
.form-card{background:var(--cream-50);border:1px solid var(--line);border-radius:var(--r-md);padding:clamp(22px,3vw,34px);box-shadow:var(--shadow-sm)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-soft);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:var(--r-sm);
  background:var(--cream-50);color:var(--ink);transition:border-color .2s ease,box-shadow .2s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brass);box-shadow:0 0 0 3px rgba(181,137,63,.18);
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:12.5px;color:var(--muted);margin-top:8px}

/* ---------- 12. 表格 ---------- */
.data-table{width:100%;border-collapse:collapse;table-layout:fixed}
.data-table th,.data-table td{border:1px solid var(--line);padding:12px 14px;text-align:left;font-size:14.5px}
.data-table th{background:var(--green-800);color:var(--cream-50);font-weight:600;letter-spacing:.05em}
.data-table tr:nth-child(even) td{background:var(--cream-100)}
.data-table td:first-child{font-weight:600;color:var(--brown-700)}

/* ---------- 13. 响应式 ---------- */
/* 中等宽度：导航收紧内边距，品牌主名缩小，隐藏电话按钮，避免导航项折行 */
@media (max-width:1200px){
  .nav-cta{display:none}
  .nav-link{padding:9px 8px;letter-spacing:.02em}
  .brand{gap:8px}
  .brand-logo{width:42px;height:42px}
  .brand-text em{font-size:19px}
  /* 右侧两个栏目的下拉菜单改为右对齐，防止窄屏下超出屏幕右缘 */
  .nav-list > li:nth-last-child(-n+2) .submenu{left:auto;right:0;transform:translateY(8px)}
  .nav-list > li:nth-last-child(-n+2):hover .submenu,
  .nav-list > li:nth-last-child(-n+2):focus-within .submenu{transform:translateY(0)}
}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-toggle{display:flex;color:currentColor}
  .nav-cta{display:none}
  .site-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;
    background:var(--cream-50);color:var(--ink);
    flex-direction:column;align-items:stretch;padding:18px var(--gutter) 40px;
    transform:translateX(100%);transition:transform .35s ease;overflow-y:auto;
  }
  .site-nav.open{transform:translateX(0);box-shadow:var(--shadow-lg)}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list > li{border-bottom:1px dashed var(--line)}
  .nav-link{padding:14px 8px;font-size:16px}
  .nav-link::after{display:none}
  .has-sub > .nav-link::before{content:"▾";float:right}
  .submenu,.submenu-grid{
    position:static;transform:none;opacity:1;visibility:visible;
    min-width:0;width:auto;box-shadow:none;border:none;border-left:3px solid var(--brass);
    border-radius:0;background:var(--cream-100);padding:6px 10px;margin:0 0 6px;
    display:none;
  }
  .submenu-grid{grid-template-columns:1fr 1fr;width:100%}
  .nav-list > li.open .submenu,.nav-list > li.open .submenu-grid{display:block}
  .submenu a{padding:10px 10px}
  .nav-mobile-cta{
    display:flex;margin:18px 0 0;padding:14px 20px;background:var(--brass);
    color:var(--cream-50);border-radius:var(--r-sm);justify-content:center;font-weight:600;
  }
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .field-row{grid-template-columns:1fr}
  .brand-text em{font-size:19px}
  .brand-logo{width:40px;height:40px}
}

/* ---------- 14. 无障碍 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal,.reveal-left,.reveal-right,.reveal-zoom{opacity:1;transform:none}
}
:focus-visible{outline:3px solid var(--brass);outline-offset:2px}