/* ============================================================
   ldpk.cn 全站全局样式 —— 收纳极简风 · 135° 对角光影呼应
   设计语言：纯白/浅灰/淡棕；光从左上入、影落右下；切角卡片
   本文件为全站共享基础，各页个性样式写在 css/pages/<页>.css
   禁止在页面内联 <style>；禁止修改本文件的类名语义
   ============================================================ */

/* ---------- 0. 变量 ---------- */
:root{
  --white:#FFFFFF;
  --gray-50:#F5F5F2;
  --gray-100:#EBEBE7;
  --gray-200:#E3E3DF;
  --brown-100:#C7B49A;
  --brown-200:#B09A7E;
  --brown-300:#94795A;
  --brown-400:#7A654C;
  --text:#33332F;
  --text-weak:#8B8B85;
  --line:#E3E3DF;
  --shadow-b:0 10px 30px rgba(122,101,76,.10), 0 2px 8px rgba(122,101,76,.06);
  --shadow-s:0 3px 10px rgba(122,101,76,.08);
  --radius:2px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --header-h:66px;
}

/* ---------- 1. Reset / 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(--font);
  font-size:15px;line-height:1.75;color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--brown-400);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--brown-300)}
ul,ol{list-style:none}
h1,h2,h3,h4{line-height:1.3;font-weight:700;color:var(--text)}
p{margin:0 0 1em}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:var(--brown-100);color:var(--white)}
:focus-visible{outline:2px solid var(--brown-300);outline-offset:2px}

/* ---------- 2. 布局容器 ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:76px 0;background:var(--white)}
.section-alt{background:var(--gray-50)}
.section-tint{background:linear-gradient(135deg,var(--gray-50) 0%,var(--white) 55%,var(--gray-100) 100%)}

/* ---------- 3. 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 26px;font-size:14px;font-weight:600;letter-spacing:1px;
  border:1px solid transparent;border-radius:var(--radius);
  transition:all .28s ease;white-space:nowrap;
}
.btn-lg{padding:14px 34px;font-size:15px}
.btn-solid{background:linear-gradient(135deg,var(--brown-200),var(--brown-400));color:#fff;box-shadow:var(--shadow-s)}
.btn-solid:hover{transform:translateY(-2px);box-shadow:var(--shadow-b);color:#fff}
.btn-line{border-color:var(--brown-200);color:var(--brown-400);background:rgba(255,255,255,.6)}
.btn-line:hover{background:var(--brown-300);border-color:var(--brown-300);color:#fff}
.btn-white{background:#fff;color:var(--brown-400);box-shadow:var(--shadow-s)}
.btn-white:hover{transform:translateY(-2px);box-shadow:var(--shadow-b);color:var(--brown-300)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:2px;color:var(--brown-400);
  background:rgba(199,180,154,.16);border:1px solid rgba(199,180,154,.5);
  padding:4px 12px;border-radius:var(--radius);
}
.tag i{width:6px;height:6px;background:var(--brown-300);transform:rotate(45deg);display:inline-block}

/* ---------- 4. 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(199,180,154,.28);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.97);
  border-bottom-color:rgba(148,121,90,.55);
  box-shadow:0 6px 22px rgba(122,101,76,.10);
}
.header-inner{max-width:1240px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand img{border-radius:var(--radius)}
.brand-name{display:flex;flex-direction:column;line-height:1.15;font-size:19px;font-weight:800;color:var(--brown-400);letter-spacing:.5px}
.brand-name small{font-size:11px;font-weight:500;color:var(--text-weak);letter-spacing:2px}

.main-nav{margin-left:auto;display:flex;align-items:center}
.main-nav ul{display:flex;align-items:center;gap:2px}
.main-nav li{position:relative}
.main-nav a.nav-link{
  display:flex;align-items:center;gap:5px;white-space:nowrap;
  padding:10px 7px;font-size:14px;font-weight:600;color:var(--text);
  border-radius:var(--radius);position:relative;
}
.main-nav a.nav-link::after{
  content:"";position:absolute;left:7px;right:7px;bottom:4px;height:2px;
  background:linear-gradient(135deg,var(--brown-200),var(--brown-400));
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.main-nav a.nav-link:hover::after,.main-nav a.nav-link.active::after{transform:scaleX(1)}
.main-nav a.nav-link.active{color:var(--brown-400)}
.main-nav a.nav-link svg{width:12px;height:12px;transition:transform .25s ease}
.has-drop:hover > a.nav-link svg{transform:rotate(180deg)}

.drop{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);
  min-width:190px;padding:10px;background:#fff;
  border:1px solid var(--line);border-top:2px solid var(--brown-300);
  box-shadow:var(--shadow-b);border-radius:var(--radius);
  opacity:0;visibility:hidden;transition:all .28s ease;z-index:110;
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));
}
.drop::before{
  content:"";position:absolute;top:-9px;left:50%;transform:translateX(-50%) rotate(45deg);
  width:16px;height:16px;background:#fff;border-top:1px solid var(--line);border-left:1px solid var(--line);
}
.has-drop:hover .drop,.has-drop:focus-within .drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.drop a{display:block;padding:9px 14px;font-size:13.5px;color:var(--text);border-radius:var(--radius);white-space:nowrap}
.drop a:hover{background:var(--gray-50);color:var(--brown-400);padding-left:18px}

.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.header-tel{display:flex;align-items:center;gap:7px;font-size:15px;font-weight:700;color:var(--brown-400);letter-spacing:.5px;white-space:nowrap}
.header-tel svg{width:17px;height:17px}
.hamburger{display:none;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.hamburger span{width:20px;height:2px;background:var(--brown-400);transition:all .3s ease}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  background:var(--gray-100);
  border-top:14px solid transparent;
  border-image:linear-gradient(135deg,var(--brown-100) 0%,var(--brown-200) 48%,var(--gray-100) 52%) 1;
  position:relative;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;top:-120px;right:-120px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(199,180,154,.25),transparent 65%);
}
.footer-main{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:42px;
  padding:60px 0 44px;position:relative;
}
.footer-brand img{margin-bottom:14px}
.footer-brand h3{font-size:17px;color:var(--brown-400);margin-bottom:10px}
.footer-brand p{font-size:13.5px;color:var(--text-weak);line-height:1.9}
.footer-col h4{font-size:14px;letter-spacing:2px;color:var(--brown-400);margin-bottom:16px;position:relative;padding-left:12px}
.footer-col h4::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;background:linear-gradient(180deg,var(--brown-100),var(--brown-300));transform:rotate(0deg)}
.footer-col a{display:block;padding:5px 0;font-size:13.5px;color:var(--text)}
.footer-col a:hover{color:var(--brown-400);padding-left:6px}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;padding:6px 0;font-size:13.5px;color:var(--text)}
.footer-contact svg{width:16px;height:16px;color:var(--brown-400);flex-shrink:0;margin-top:4px}
.footer-contact a{display:inline;padding:0;color:var(--brown-400)}
.footer-contact a:hover{padding:0;text-decoration:underline}
.footer-bottom{
  border-top:1px solid var(--gray-200);padding:16px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-weak);position:relative;
}
.footer-bottom a{color:var(--brown-400)}

/* ---------- 6. 面包屑 ---------- */
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-weak)}
.crumb a{color:var(--text-weak)}
.crumb a:hover{color:var(--brown-400)}
.crumb i{width:6px;height:6px;border-top:1.5px solid var(--brown-200);border-right:1.5px solid var(--brown-200);transform:rotate(45deg)}

/* ---------- 7. 滚动渐入 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,.61,.36,1)}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- 8. 对角光影基础件（各页按需组合，勿同页全用） ---------- */
.beam{position:relative;overflow:hidden}
.beam::before{
  content:"";position:absolute;top:-30%;left:-14%;width:52%;height:170%;
  background:linear-gradient(135deg,rgba(255,255,255,.75),rgba(255,255,255,0) 62%);
  pointer-events:none;z-index:1;
}
.glow-c{position:relative;overflow:hidden}
.glow-c::before{
  content:"";position:absolute;top:-140px;left:-140px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(199,180,154,.32),transparent 65%);pointer-events:none;
}
.glow-c::after{
  content:"";position:absolute;right:-160px;bottom:-160px;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(122,101,76,.14),transparent 65%);pointer-events:none;
}
.cut-card{
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}
.sheen{position:relative;overflow:hidden}
.sheen::after{
  content:"";position:absolute;top:0;left:-80%;width:60%;height:100%;
  background:linear-gradient(115deg,rgba(255,255,255,0),rgba(255,255,255,.5),rgba(255,255,255,0));
  transform:skewX(-20deg);transition:left .7s ease;pointer-events:none;
}
.sheen:hover::after{left:130%}
.diag-line{height:2px;background:linear-gradient(135deg,transparent 0%,var(--brown-200) 40%,var(--brown-300) 60%,transparent 100%)}

/* ---------- 9. 悬浮电话 / 返回顶部 ---------- */
.back-top{
  position:fixed;right:26px;bottom:96px;z-index:90;
  width:44px;height:44px;border-radius:var(--radius);
  background:rgba(255,255,255,.92);border:1px solid var(--line);
  box-shadow:var(--shadow-s);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all .3s ease;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--brown-300);border-color:var(--brown-300)}
.back-top svg{width:20px;height:20px;stroke:var(--brown-400)}
.back-top:hover svg{stroke:#fff}
.float-tel{
  position:fixed;right:26px;bottom:26px;z-index:90;
  display:flex;align-items:center;gap:8px;
  padding:13px 20px;font-size:15px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--brown-200),var(--brown-400));
  border-radius:var(--radius);box-shadow:var(--shadow-b);
}
.float-tel svg{width:18px;height:18px}
.float-tel:hover{color:#fff;transform:translateY(-2px)}

/* ---------- 10. 表格 / 表单基础 ---------- */
.tbl{width:100%;border-collapse:collapse;table-layout:fixed;font-size:14px}
.tbl th,.tbl td{padding:13px 14px;border:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{background:var(--gray-50);color:var(--brown-400);font-weight:700;letter-spacing:.5px}
.tbl tr:nth-child(even) td{background:var(--gray-50)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-field label{font-size:13px;font-weight:600;color:var(--brown-400);letter-spacing:.5px}
.form-field input,.form-field select,.form-field textarea{
  padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;font-size:14px;transition:border-color .25s ease,box-shadow .25s ease;
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  outline:none;border-color:var(--brown-300);box-shadow:0 0 0 3px rgba(148,121,90,.14);
}
.form-ok{display:none;margin-top:14px;padding:12px 16px;background:var(--gray-50);border-left:3px solid var(--brown-300);color:var(--brown-400);font-size:14px}
.form-ok.show{display:block}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1080px){
  .footer-main{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:1170px){
  .hamburger{display:flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);
    background:#fff;box-shadow:-8px 0 30px rgba(122,101,76,.15);
    padding:76px 26px 30px;overflow-y:auto;
    transform:translateX(105%);transition:transform .35s ease;z-index:105;
    display:block;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .main-nav a.nav-link{padding:12px 8px;font-size:15px;justify-content:space-between;white-space:nowrap}
  .main-nav a.nav-link::after{display:none}
  .drop{position:static;transform:none;opacity:1;visibility:visible;min-width:0;padding:2px 0 6px 14px;box-shadow:none;border:0;clip-path:none;margin-top:0}
  .drop::before{display:none}
  .drop a{padding:8px 10px;font-size:14px;white-space:nowrap}
  .has-drop:hover .drop,.has-drop:focus-within .drop{transform:none}
}
@media (max-width:920px){
  .header-tel{display:none}
}
@media (max-width:720px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .footer-main{grid-template-columns:1fr;gap:24px;padding:44px 0 30px}
  .footer-bottom{flex-direction:column;gap:6px}
  .form-grid{grid-template-columns:1fr}
  .float-tel{padding:11px 15px;font-size:13.5px;right:16px;bottom:16px}
  .back-top{right:16px;bottom:84px}
}