/* ============================================================
   川房拍 · 房屋/办公室租售拍卖平台 — 公共样式
   织梦部署：将本文件与 images/ 一起上传，css 放网站根 /css/
   ============================================================ */
:root{
  --c-primary:#0A2540;
  --c-primary-2:#1B3A5C;
  --c-gold:#C9A961;
  --c-gold-2:#D4B876;
  --c-bg:#F7F8FC;
  --c-surface:#FFFFFF;
  --c-text:#1A2332;
  --c-text-2:#5A6B7D;
  --c-border:#E8ECF2;
  --c-shadow:0 8px 30px rgba(10,37,64,.08);
  --c-shadow-lg:0 20px 60px rgba(10,37,64,.12);
  --radius:16px;
  --radius-lg:24px;
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1240px;
}
[data-theme="dark"]{
  --c-primary:#E8EDF5;--c-primary-2:#C9D3E0;--c-gold:#D4B876;--c-gold-2:#E0C98A;
  --c-bg:#0B1220;--c-surface:#141E30;--c-text:#E8EDF5;--c-text-2:#94A3B8;
  --c-border:#243248;--c-shadow:0 8px 30px rgba(0,0,0,.4);--c-shadow-lg:0 20px 60px rgba(0,0,0,.5);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--c-bg);color:var(--c-text);line-height:1.7;
  transition:background .4s var(--ease),color .4s var(--ease);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ==================== 顶部导航 ==================== */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .4s var(--ease)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 24px}
.nav.scrolled{
  background:color-mix(in srgb,var(--c-surface) 85%,transparent);
  backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--c-border);
  box-shadow:var(--c-shadow);
}
.nav.scrolled .nav-inner{height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;color:var(--c-primary)}
.logo-icon{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-2));
  display:grid;place-items:center;color:var(--c-gold);font-size:20px;
}
.logo span{color:var(--c-gold)}
.logo small{font-size:11px;font-weight:500;color:var(--c-text-2);display:block;line-height:1.2}
.nav-menu{display:flex;gap:26px;align-items:center}
.nav-menu a{font-weight:500;font-size:15px;color:var(--c-text);position:relative;padding:6px 0;transition:color .3s}
.nav-menu a::after{
  content:'';position:absolute;bottom:0;left:0;width:0;height:2px;
  background:var(--c-gold);transition:width .3s var(--ease);
}
.nav-menu a:hover,.nav-menu a.cur{color:var(--c-gold)}
.nav-menu a:hover::after,.nav-menu a.cur::after{width:100%}
.nav-right{display:flex;align-items:center;gap:16px}
.nav-phone{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--c-primary);font-size:15px}
.nav-phone i{color:var(--c-gold);font-size:18px}
.theme-toggle{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--c-border);
  background:var(--c-surface);cursor:pointer;display:grid;place-items:center;
  color:var(--c-text);font-size:18px;transition:all .3s;
}
.theme-toggle:hover{transform:rotate(15deg);border-color:var(--c-gold);color:var(--c-gold)}
.btn-mobile-menu{display:none;background:none;border:none;color:var(--c-text);font-size:24px;cursor:pointer}
.mobile-menu{
  display:none;position:fixed;top:64px;left:0;right:0;z-index:999;
  background:var(--c-surface);padding:20px 24px;flex-direction:column;gap:6px;
  border-bottom:1px solid var(--c-border);box-shadow:var(--c-shadow-lg);
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 0;font-weight:600;color:var(--c-text);border-bottom:1px solid var(--c-border)}
.mobile-menu a:last-child{border-bottom:none}

/* ==================== 按钮 ==================== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 28px;border-radius:12px;font-weight:600;font-size:15px;
  cursor:pointer;border:none;transition:all .35s var(--ease);
  position:relative;overflow:hidden;
}
.btn-primary{
  background:linear-gradient(135deg,var(--c-gold),var(--c-gold-2));
  color:#fff;box-shadow:0 8px 24px rgba(201,169,97,.35);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 36px rgba(201,169,97,.5)}
.btn-outline{background:transparent;color:var(--c-primary);border:1.5px solid var(--c-border)}
.btn-outline:hover{border-color:var(--c-gold);color:var(--c-gold);transform:translateY(-2px)}
.btn-dark{background:var(--c-primary);color:#fff}
.btn-dark:hover{transform:translateY(-3px);box-shadow:var(--c-shadow-lg)}
.magnetic{will-change:transform}

/* ==================== 通用 Section ==================== */
.section{padding:96px 0;position:relative}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;
  color:var(--c-gold);text-transform:uppercase;margin-bottom:14px;
}
.section-title{font-size:38px;font-weight:900;color:var(--c-primary);line-height:1.25;letter-spacing:-.5px}
.section-desc{font-size:16px;color:var(--c-text-2);margin-top:16px}

/* ==================== 底部 ==================== */
.footer{background:var(--c-primary);color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:20px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;
  background:rgba(255,255,255,.08);display:grid;place-items:center;
  color:#fff;font-size:18px;transition:all .3s;
}
.footer-social a:hover{background:var(--c-gold);transform:translateY(-3px)}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;transition:color .3s}
.footer-col a:hover{color:var(--c-gold)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:24px 0;
  display:flex;justify-content:space-between;align-items:center;font-size:13px;flex-wrap:wrap;gap:12px;
}
.footer-bottom a:hover{color:var(--c-gold)}
.friend-links{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.friend-links span{color:rgba(255,255,255,.4)}

/* ==================== 浮动 / 回顶 ==================== */
.back-top{
  position:fixed;bottom:30px;right:30px;width:48px;height:48px;
  border-radius:14px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:22px;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(20px);
  transition:all .4s var(--ease);z-index:900;box-shadow:var(--c-shadow-lg);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--c-gold);transform:translateY(-4px)}
.float-contact{position:fixed;left:20px;bottom:30px;z-index:900;display:flex;flex-direction:column;gap:12px}
.float-btn{
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;font-size:22px;cursor:pointer;
  box-shadow:var(--c-shadow-lg);transition:all .35s var(--ease);
  color:#fff;position:relative;
}
.float-btn.phone{background:linear-gradient(135deg,#27ae60,#2ecc71)}
.float-btn.wechat{background:linear-gradient(135deg,#0A2540,#1B3A5C)}
.float-btn:hover{transform:scale(1.12) rotate(8deg)}
.float-btn .tooltip{
  position:absolute;left:64px;top:50%;transform:translateY(-50%);
  background:var(--c-primary);color:#fff;padding:6px 14px;border-radius:8px;
  font-size:13px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .3s;
}
.float-btn:hover .tooltip{opacity:1}

/* ==================== 动效 ==================== */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal.d1{transition-delay:.1s}
.reveal.d2{transition-delay:.2s}
.reveal.d3{transition-delay:.3s}
@keyframes popIn{0%{opacity:0;transform:scale(.92)}100%{opacity:1;transform:scale(1)}}
.ri-spin{display:inline-block;animation:spin 1s linear infinite}
@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}

/* ==================== 响应式 ==================== */
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .btn-mobile-menu{display:block}
  .nav-phone span{display:none}
  .nav-inner{height:64px}
  .section{padding:64px 0}
  .section-title{font-size:28px}
  .footer{padding:48px 0 0}
  .footer-grid{grid-template-columns:repeat(3,1fr);gap:20px 12px}
  .footer-brand{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;text-align:center;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:6px}
  .footer-brand .logo{display:inline-flex;justify-content:center}
  .footer-brand p{font-size:13px}
  .footer-social{justify-content:center}
  .footer-col h4{font-size:13px;margin-bottom:12px;text-align:center;letter-spacing:1px}
  .footer-col ul{flex-direction:row;flex-wrap:wrap;gap:6px;justify-content:center}
  .footer-col ul li{flex:none}
  .footer-col ul a{
    display:inline-block;padding:4px 10px;border-radius:50px;
    background:rgba(255,255,255,.06);color:rgba(255,255,255,.75);
    font-size:11.5px;line-height:1.6;transition:all .25s;
  }
  .footer-col ul a:hover{background:var(--c-gold);color:#fff;transform:translateY(-1px)}
  .friend-links{justify-content:center;gap:10px}
  .friend-links a{font-size:12px;padding:3px 10px;border-radius:50px;background:rgba(255,255,255,.05)}
  .friend-links span{width:100%;text-align:center;margin-bottom:4px;font-size:12px}
  .footer-bottom{flex-direction:column;text-align:center}
  .float-contact{left:14px;bottom:20px}
  .float-btn{width:46px;height:46px;font-size:20px}
  .back-top{right:16px;bottom:20px;width:44px;height:44px}
}

/* ==================== 公共 JS 行为 ==================== */