/* home/css/nav.css — 顶部透明导航(滚动缩小) + 汉堡全屏滑入菜单 */

/* ══ 顶部透明导航（roadbook 范式：居中大字 KUNMING + 滚动缩小 + 始终透明无玻璃）══ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;align-items:center;justify-content:center;
  padding:18px clamp(16px,4vw,32px);
  color:#fff;background:transparent;
  pointer-events:none;
  transition:padding .25s ease;
}
.topbar .brand{pointer-events:auto}
.topbar .brand{display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;color:#fff;line-height:1.05}
.topbar .brand-word{
  font-family:'Avenir Next','Avenir',-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;font-weight:900;letter-spacing:5px;
  font-size:clamp(48px,11vw,180px);
  transition:letter-spacing .25s ease,color .25s ease;
  color:#fff;text-shadow:0 2px 18px rgba(37,41,43,.45);
}
.topbar .brand-sub{font-family:var(--mono);font-size:10.5px;color:rgba(255,255,255,.78);letter-spacing:.18em;transition:opacity .25s ease,transform .25s ease}
.topbar.is-solid .brand-word{letter-spacing:3px;color:var(--ink);text-shadow:none}
.topbar.is-solid .brand-sub{opacity:0;transform:translateY(-3px)}
@media (max-width:767px){
  .topbar .brand-word{font-size:32px;letter-spacing:3px}
}
/* 移动端吸顶分段导航(.seg-nav) / 吸底 CTA(.mobile-cta) 已移除
   移动端统一为：KUNMING 透明顶栏(随 hero 滚走) + 页脚入口，与桌面端一致 */
#eat,#guides,#voice,#market,#seasons,#tips,#bnb,#top{scroll-margin-top:90px}

@media (max-width:640px){
  .guides{grid-template-columns:1fr;gap:16px}
  .eat-inner{grid-template-columns:1fr;gap:22px}
  .vtitle{font-size:19px}
  .vchap-h{gap:10px;padding-top:20px}
  .voice-outro p{font-size:15px}
}
@media (max-width:560px){
  .section{padding:60px 0}
  .hero{aspect-ratio:auto;min-height:62vh}
  .hero::before{background:linear-gradient(180deg,rgba(37,41,43,.5) 0%,rgba(37,41,43,.3) 50%,rgba(37,41,43,.62) 100%)}
  .hero-dots{right:auto;left:50%;transform:translateX(-50%)}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
  .js .section{opacity:1!important;transform:none!important}
  .js .section .stagger > *{opacity:1!important;transform:none!important}
}
/* ══ 顶部汉堡 → 全屏滑入菜单（复刻 roadbook，与详情页一致）══ */
.menu-btn{position:fixed;top:14px;right:14px;width:44px;height:44px;padding:0;border:0;background:none;cursor:pointer;z-index:95}
.menu-btn .menu-btn-back{position:absolute;inset:0;background:var(--ink);border-radius:50%;transition:transform .3s ease;z-index:1}
.menu-btn:hover .menu-btn-back{transform:scale(1.08)}
.menu-btn .menu-btn-title{position:relative;z-index:2;display:block;font-family:var(--mono);font-size:9px;font-weight:500;letter-spacing:.14em;color:#fff;text-align:center;line-height:44px;text-transform:uppercase}
.site-nav{position:fixed;inset:0;z-index:92;background:var(--paper);opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease;display:flex;flex-direction:column}
.site-nav.open{opacity:1;visibility:visible}
.site-nav .nav-inner{width:100%;max-width:760px;margin:0 auto;padding:118px 28px 56px;overflow-y:auto}
.site-nav .nav-main{list-style:none;display:grid;gap:4px}
.site-nav .nav-main a{font-family:var(--serif-display);font-weight:300;font-size:clamp(34px,6.6vw,60px);line-height:1.18;color:var(--ink);text-decoration:none;display:inline-block;transition:opacity .2s ease,transform .25s ease}
.site-nav .nav-main a:hover{opacity:.55;transform:translateX(10px)}
.site-nav .nav-sec{list-style:none;display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.site-nav .nav-sec a{font-family:var(--mono);font-size:13px;letter-spacing:.05em;color:var(--slate);text-decoration:none}
.site-nav .nav-sec a:hover{color:var(--ink)}
body.nav-open{overflow:hidden}