/* ==========================================================================
   mbexlc.com · 墨白互联 — 全站基础样式（设计体系）
   --------------------------------------------------------------------------
   风格体系：古风拍摄配色 —— 月白(宣纸白) / 竹青(青竹绿) / 朱砂(印章红)
   结构：设计令牌 → 重置 → 排版 → 通用组件 → 顶栏/导航 → 页脚 → 动效 → 响应式
   说明：本文件承载全站统一规范；各页面独有模块样式写入 css/page-*.css，
         保证「相同功能模块在不同页面不重复同一套样式」。
   ========================================================================== */

/* ===== 1. 设计令牌 ===== */
:root{
  /* 月白系（宣纸 / 米白） */
  --moon-50:#FCFBF7;
  --moon-100:#F7F5EE;
  --moon-200:#F0ECDF;
  --moon-300:#E6E0CE;
  --moon-400:#D9D1B8;
  /* 竹青系（青竹绿） */
  --bamboo-300:#9CBD9F;
  --bamboo-400:#6E9E7B;
  --bamboo-500:#4E7C5B;
  --bamboo-600:#3D6549;
  --bamboo-700:#2E4E39;
  --bamboo-900:#1D3426;
  /* 朱砂系（印章红） */
  --cinnabar-400:#D1544E;
  --cinnabar-500:#C02F2B;
  --cinnabar-600:#A32622;
  --cinnabar-700:#861D1A;
  /* 墨色 */
  --ink-900:#26251F;
  --ink-700:#4A4840;
  --ink-500:#78745F;
  --ink-400:#A09C89;
  /* 线 / 面 */
  --line:rgba(38,37,31,.14);
  --line-soft:rgba(38,37,31,.08);
  /* 圆角 / 阴影 */
  --radius:10px;
  --radius-lg:20px;
  --shadow-soft:0 10px 30px rgba(38,37,31,.08);
  --shadow-lift:0 18px 44px rgba(46,78,57,.16);
  /* 字体 */
  --serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  /* 布局 */
  --maxw:1240px;
}

/* ===== 2. 重置与基础 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:
    radial-gradient(1200px 500px at 85% -100px, rgba(78,124,91,.06), transparent 60%),
    radial-gradient(900px 420px at -10% 20%, rgba(192,47,43,.04), transparent 55%),
    repeating-linear-gradient(0deg, rgba(38,37,31,.013) 0 1px, transparent 1px 4px),
    var(--moon-100);
  min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease,transform .25s ease}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-family:var(--serif);color:var(--ink-900);font-weight:700;line-height:1.35}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:16px}
:focus-visible{outline:2px solid var(--cinnabar-500);outline-offset:2px}
::selection{background:var(--bamboo-500);color:var(--moon-50)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--moon-200)}
::-webkit-scrollbar-thumb{background:var(--bamboo-400);border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:var(--bamboo-500)}

/* ===== 3. 排版 ===== */
.container{width:min(var(--maxw),92%);margin-inline:auto}
.section{padding-block:clamp(64px,8vw,112px);position:relative}
.section-tight{padding-block:clamp(40px,5vw,72px)}
.text-center{text-align:center}
.serif{font-family:var(--serif)}
.muted{color:var(--ink-500)}
.cinnabar{color:var(--cinnabar-500)}
.bamboo{color:var(--bamboo-600)}
.lead{font-size:clamp(16px,1.6vw,19px);color:var(--ink-500);line-height:2}
/* 眉标（章节小标签）—— 每页可在 page css 中差异化 */
.kicker{
  display:inline-flex;align-items:center;gap:12px;
  font-size:13px;letter-spacing:.32em;color:var(--cinnabar-500);
  font-family:var(--sans);font-weight:600;
}
.kicker::before{content:"";width:34px;height:1px;background:var(--cinnabar-500)}
.kicker.center::after{content:"";width:34px;height:1px;background:var(--cinnabar-500)}
/* 章节主标题 */
.section-title{font-size:clamp(28px,3.4vw,44px);letter-spacing:.06em;margin-top:14px}
.section-title .sep{color:var(--bamboo-500);font-weight:400;margin-inline:.14em}
.section-desc{margin-top:16px;max-width:720px;color:var(--ink-500)}
.center-block{margin-inline:auto;text-align:center}

/* 竖排文字（古风装饰，页面可复用） */
.vertical-text{
  writing-mode:vertical-rl;letter-spacing:.34em;font-family:var(--serif);
  color:var(--bamboo-600);font-size:15px;
}

/* ===== 4. 通用组件 ===== */
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 30px;font-size:15px;font-weight:600;letter-spacing:.08em;
  border-radius:var(--radius);transition:all .28s ease;position:relative;overflow:hidden;
}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-lg{padding:16px 38px;font-size:16px}
.btn-cinnabar{background:var(--cinnabar-500);color:#FFF8F2}
.btn-cinnabar:hover{background:var(--cinnabar-600);color:#FFF8F2;transform:translateY(-2px);box-shadow:0 12px 26px rgba(192,47,43,.28)}
.btn-bamboo{background:var(--bamboo-500);color:#F4F8F2}
.btn-bamboo:hover{background:var(--bamboo-600);color:#F4F8F2;transform:translateY(-2px);box-shadow:0 12px 26px rgba(78,124,91,.3)}
.btn-ghost{border:1px solid var(--bamboo-500);color:var(--bamboo-600);background:transparent}
.btn-ghost:hover{background:var(--bamboo-500);color:var(--moon-50)}
.btn-line-light{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-line-light:hover{background:rgba(255,255,255,.14);color:#fff}
/* 印章（朱砂方印） */
.seal{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--cinnabar-500);color:#FFF3EC;
  font-family:var(--serif);font-weight:700;letter-spacing:.12em;
  border-radius:6px;box-shadow:inset 0 0 0 2px rgba(255,243,236,.35);
  padding:.35em .55em;font-size:13px;transform:rotate(-2deg);
}
/* 通用标签 */
.tag{
  display:inline-block;padding:4px 14px;font-size:13px;color:var(--bamboo-600);
  border:1px solid rgba(78,124,91,.4);border-radius:999px;background:rgba(78,124,91,.06);
}
.tag-cinnabar{color:var(--cinnabar-600);border-color:rgba(192,47,43,.4);background:rgba(192,47,43,.05)}
/* 分割装饰 */
.divider-line{width:64px;height:2px;background:linear-gradient(90deg,var(--cinnabar-500),transparent)}
/* 图文通用遮罩层（页面用于错位叠加） */
.mask-ink{position:absolute;inset:0;background:linear-gradient(120deg,rgba(29,52,38,.55),rgba(38,37,31,.12) 55%,transparent)}

/* 表格（报价/参数页通用基座） */
.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-soft)}
.data-table th{background:var(--bamboo-700);color:var(--moon-100);font-weight:600;padding:14px 18px;text-align:left;font-size:15px}
.data-table td{padding:14px 18px;border-top:1px solid var(--line-soft);font-size:15px}
.data-table tr:nth-child(even) td{background:var(--moon-50)}

/* 表单基座 */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:14px;color:var(--ink-700);letter-spacing:.06em}
.field input,.field textarea,.field select{
  border:1px solid var(--line);background:#fff;border-radius:8px;padding:12px 16px;color:var(--ink-900);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--bamboo-500);box-shadow:0 0 0 3px rgba(78,124,91,.14)}
.field textarea{min-height:140px;resize:vertical}
.field .required{color:var(--cinnabar-500)}

/* ===== 5. 顶部信息栏 ===== */
.site-topbar{background:var(--bamboo-900);color:rgba(247,245,238,.82);font-size:13.5px;position:relative;z-index:60}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;min-height:40px;gap:16px}
.topbar-tip{letter-spacing:.06em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-contact{display:flex;align-items:center;gap:22px;flex-shrink:0}
.topbar-link{display:inline-flex;align-items:center;gap:6px;color:rgba(247,245,238,.82)}
.topbar-link:hover{color:#fff}
.topbar-link svg{width:14px;height:14px;fill:currentColor}
.topbar-wechat{position:relative;cursor:default}
.topbar-wechat:hover .wechat-tip{opacity:1;visibility:visible;transform:translate(-50%,0)}
.wechat-tip{
  position:absolute;left:50%;top:calc(100% + 10px);transform:translate(-50%,6px);
  background:#fff;color:var(--ink-700);padding:10px 14px;border-radius:8px;white-space:nowrap;
  box-shadow:var(--shadow-lift);opacity:0;visibility:hidden;transition:all .28s ease;z-index:70;
  font-size:13px;
}
.wechat-tip::before{content:"";position:absolute;left:50%;top:-5px;transform:translateX(-50%);border:5px solid transparent;border-bottom-color:#fff}

/* ===== 6. 主导航 ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,245,238,.92);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
  transition:background .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.site-header.scrolled{background:rgba(247,245,238,.98);box-shadow:0 8px 30px rgba(38,37,31,.08)}
.header-inner{display:flex;align-items:center;gap:26px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand img{height:44px;width:auto;object-fit:contain}
.brand-name{font-family:var(--serif);font-size:24px;font-weight:700;color:var(--ink-900);letter-spacing:.12em;display:flex;align-items:baseline;gap:8px}
.brand-name em{font-style:normal;font-size:11px;letter-spacing:.28em;color:var(--bamboo-500);font-family:var(--sans)}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-link{
  display:block;padding:10px 8px;font-size:15.5px;letter-spacing:.02em;color:var(--ink-700);
  border-radius:8px;position:relative;
}
.nav-link::after{
  content:"";position:absolute;left:15px;right:15px;bottom:5px;height:2px;
  background:var(--cinnabar-500);transform:scaleX(0);transform-origin:left;transition:transform .28s ease;
}
.nav-item:hover .nav-link,.nav-link.active{color:var(--bamboo-600)}
.nav-item:hover .nav-link::after,.nav-link.active::after{transform:scaleX(1)}
/* 下拉面板 */
.sub-panel{
  position:absolute;left:0;top:calc(100% + 10px);min-width:260px;
  background:#fffdf8;border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lift);padding:18px;opacity:0;visibility:hidden;
  transform:translateY(10px);transition:all .3s ease;z-index:80;
}
.sub-panel::before{content:"";position:absolute;left:24px;top:-8px;border:8px solid transparent;border-bottom-color:#fffdf8}
.nav-item:hover .sub-panel,.nav-item:focus-within .sub-panel{opacity:1;visibility:visible;transform:translateY(0)}
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:2px 14px}
.sub-grid a{
  padding:7px 10px;font-size:14px;color:var(--ink-700);border-radius:6px;display:flex;align-items:center;gap:8px;
}
.sub-grid a::before{content:"";width:5px;height:5px;background:var(--bamboo-400);border-radius:50%;flex-shrink:0;transition:background .2s}
.sub-grid a:hover{background:rgba(78,124,91,.08);color:var(--bamboo-600)}
.sub-grid a:hover::before{background:var(--cinnabar-500)}
.sub-more{
  display:block;margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);
  font-size:13.5px;color:var(--cinnabar-500);font-weight:600;letter-spacing:.1em;text-align:center;
}
.sub-more:hover{color:var(--cinnabar-700)}
/* 右侧按钮组 */
.header-side{display:flex;align-items:center;gap:14px;flex-shrink:0}
/* 汉堡按钮 */
.nav-toggle{display:none;width:42px;height:42px;border-radius:8px;position:relative;z-index:90}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink-900);margin:5px auto;transition:all .3s ease;border-radius:2px}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 7. 页脚 ===== */
.site-footer{background:var(--bamboo-900);color:rgba(247,245,238,.75);margin-top:0;position:relative}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--cinnabar-500) 0 18%,var(--bamboo-500) 18% 46%,var(--moon-300) 46% 100%);
}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;padding-block:64px 48px}
.footer-brand p{font-size:14px;line-height:2;margin-top:16px;max-width:300px}
.footer-brand img{height:42px;width:auto}
.footer-hotline{margin-top:22px;display:flex;flex-direction:column;gap:4px}
.footer-hotline span{font-size:12.5px;letter-spacing:.3em;color:rgba(247,245,238,.5)}
.footer-hotline a{font-size:26px;font-weight:700;color:var(--moon-100);font-family:var(--serif);letter-spacing:.05em}
.footer-hotline a:hover{color:var(--cinnabar-400)}
.footer-col h4{color:var(--moon-100);font-size:17px;letter-spacing:.14em;margin-bottom:20px;position:relative;padding-bottom:12px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:30px;height:2px;background:var(--cinnabar-500)}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(247,245,238,.72)}
.footer-col a:hover{color:var(--moon-100);padding-left:4px}
.footer-contact-item{display:flex;gap:10px;margin-bottom:14px;font-size:14px;line-height:1.7}
.footer-contact-item svg{width:16px;height:16px;fill:var(--cinnabar-400);flex-shrink:0;margin-top:4px}
.footer-contact-item a{color:rgba(247,245,238,.85)}
.footer-addr{font-size:13px;color:rgba(247,245,238,.55);line-height:1.9;margin-top:16px;padding-top:16px;border-top:1px dashed rgba(247,245,238,.18)}
.footer-bottom{border-top:1px solid rgba(247,245,238,.12);padding-block:20px}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.copyright{font-size:13.5px;color:rgba(247,245,238,.6)}
.copyright a{color:rgba(247,245,238,.6)}
.copyright a:hover{color:var(--moon-100)}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:13.5px;color:rgba(247,245,238,.6)}
.footer-links a:hover{color:var(--moon-100)}
.footer-icp{color:rgba(247,245,238,.6)}

/* ===== 8. 悬浮联系 / 回到顶部 ===== */
.float-contact{position:fixed;right:18px;bottom:26px;z-index:90;display:flex;flex-direction:column;gap:12px}
.float-btn{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;box-shadow:var(--shadow-lift);position:relative;transition:all .3s ease;
}
.float-btn svg{width:22px;height:22px;fill:currentColor}
.float-btn:hover{transform:translateY(-3px)}
.float-phone{background:var(--cinnabar-500)}
.float-phone:hover{background:var(--cinnabar-600)}
.float-wechat{background:var(--bamboo-500)}
.float-wechat:hover{background:var(--bamboo-600)}
.float-top{background:var(--ink-900);font-size:12px;color:var(--moon-100);letter-spacing:.1em}
.float-btn .float-label{
  position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%) translateX(6px);
  background:var(--ink-900);color:var(--moon-100);font-size:13px;white-space:nowrap;padding:7px 13px;
  border-radius:7px;opacity:0;visibility:hidden;transition:all .28s ease;
}
.float-btn:hover .float-label{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.float-label::after{content:"";position:absolute;left:100%;top:50%;transform:translateY(-50%);border:5px solid transparent;border-left-color:var(--ink-900)}

/* ===== 9. 滚动渐入动画 ===== */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.22,.68,.35,1),transform .8s cubic-bezier(.22,.68,.35,1)}
.reveal.in-view{opacity:1;transform:translateY(0)}
.reveal-left{opacity:0;transform:translateX(-40px);transition:opacity .8s ease,transform .8s ease}
.reveal-right{opacity:0;transform:translateX(40px);transition:opacity .8s ease,transform .8s ease}
.reveal-left.in-view,.reveal-right.in-view{opacity:1;transform:translateX(0)}
.reveal-scale{opacity:0;transform:scale(.94);transition:opacity .8s ease,transform .8s ease}
.reveal-scale.in-view{opacity:1;transform:scale(1)}
[data-delay="1"]{transition-delay:.1s}
[data-delay="2"]{transition-delay:.2s}
[data-delay="3"]{transition-delay:.3s}
[data-delay="4"]{transition-delay:.4s}
[data-delay="5"]{transition-delay:.5s}

/* 首屏文字入场（逐行上浮） */
@keyframes riseIn{from{opacity:0;transform:translateY(38px)}to{opacity:1;transform:translateY(0)}}
.rise-1{animation:riseIn .9s .05s cubic-bezier(.22,.68,.35,1) both}
.rise-2{animation:riseIn .9s .22s cubic-bezier(.22,.68,.35,1) both}
.rise-3{animation:riseIn .9s .4s cubic-bezier(.22,.68,.35,1) both}
.rise-4{animation:riseIn .9s .58s cubic-bezier(.22,.68,.35,1) both}
.rise-5{animation:riseIn .9s .76s cubic-bezier(.22,.68,.35,1) both}
@keyframes inkSweep{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.ink-sweep{transform-origin:left;animation:inkSweep 1s .5s cubic-bezier(.22,.68,.35,1) both}

/* ===== 10. 面包屑（通用基座，样式随页微调） ===== */
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);flex-wrap:wrap}
.crumb a{color:var(--bamboo-600)}
.crumb a:hover{color:var(--cinnabar-500)}
.crumb i{font-style:normal;color:var(--ink-400)}

/* ===== 11. 响应式 ===== */
@media (max-width:1080px){
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
  .topbar-tip{display:none}
  .topbar-inner{justify-content:center}
}
@media (max-width:920px){
  .nav-toggle{display:block}
  .main-nav{
    position:fixed;inset:0 0 0 auto;width:min(340px,86vw);height:100dvh;z-index:85;
    background:var(--moon-100);box-shadow:-18px 0 50px rgba(38,37,31,.18);
    transform:translateX(102%);transition:transform .4s cubic-bezier(.22,.68,.35,1);
    overflow-y:auto;padding:92px 26px 40px;
  }
  .main-nav.open{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:13px 12px;font-size:16.5px;border-bottom:1px solid var(--line-soft)}
  .nav-link::after{display:none}
  .sub-panel{
    position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    background:rgba(78,124,91,.06);border-radius:10px;margin:4px 0 10px;padding:12px;display:none;
  }
  .sub-panel::before{display:none}
  .nav-item.sub-open .sub-panel{display:block}
  .sub-grid{grid-template-columns:1fr}
  .sub-more{border-top-color:var(--line)}
  .header-side .btn{display:none}
}
@media (max-width:640px){
  body{font-size:15px}
  .footer-top{grid-template-columns:1fr;gap:32px;padding-block:48px 32px}
  .footer-bottom .container{flex-direction:column;text-align:center}
  .footer-links{flex-wrap:wrap;justify-content:center;gap:12px}
  .float-contact{right:12px;bottom:16px}
  .float-btn{width:48px;height:48px}
  .form-grid{grid-template-columns:1fr}
  .topbar-contact{gap:12px}
  .topbar-link{font-size:12.5px}
  .topbar-wechat{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal,.reveal-left,.reveal-right,.reveal-scale{opacity:1;transform:none}
}