:root{
  --primary:#b75d3a;
  --secondary:#1c8073;
  --accent:#e8c46c;
  --ink:#2a1d10;
  --bg:#f1e2c4;
  --fg:#3a2a1a;
  --fg-muted:#7e6849;
  --surface:#fbf3df;
  --surface-alt:#e6d4ad;
}
/* desert-dune — Desert Dune 沙漠之丘 / 沙黄 + 砖红 + 绿松石 */
*{box-sizing:border-box;}
body{background:#f1e2c4;color:#3a2a1a;font-family:"Inter","Pretendard","Noto Sans","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased;}
::selection{background:#b75d3a;color:#fff;}
::-webkit-scrollbar{width:11px;}
::-webkit-scrollbar-track{background:#e6d4ad;}
::-webkit-scrollbar-thumb{background:#b75d3a;border-radius:10px;}

.fill-primary{background:#b75d3a;color:#fff;}
.fill-secondary{background:#1c8073;color:#fff;}
.fill-accent{background:#e8c46c;color:#2a1d10;}
.fill-ink{background:#2a1d10;color:#f1e2c4;}
.fill-surface{background:#fbf3df;color:#3a2a1a;}
.fill-surface-alt{background:#e6d4ad;color:#3a2a1a;}
.t-primary{color:#b75d3a;}
.t-secondary{color:#1c8073;}
.t-accent{color:#e8c46c;}
.t-muted{color:#7e6849;}
.grad{background:linear-gradient(135deg,#b75d3a,#e8c46c);color:#fff;}
.t-grad{background:linear-gradient(135deg,#b75d3a,#e8c46c);-webkit-background-clip:text;background-clip:text;color:transparent;}

.headline{font-family:"DM Serif Display","Source Han Serif",serif;font-weight:800;letter-spacing:-.01em;line-height:1.08;}
.tag{font-weight:800;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;}
.chip{display:inline-flex;align-items:center;gap:.4rem;font-weight:700;font-size:.78rem;padding:.4rem .9rem;border-radius:9999px;background:#e6d4ad;color:#b75d3a;}

.card{background:#fbf3df;border:1px solid #2a1d101f;border-radius:14px;transition:transform .25s ease,box-shadow .25s ease;}
.card:hover,.card.video-card:hover{box-shadow:0 0 0 1px #2a1d1033;}
.card-soft{background:#e6d4ad;border-radius:14px;}
.card-glass{background:#fbf3df;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid rgba(255,255,255,.12);border-radius:14px;}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-weight:800;letter-spacing:.02em;padding:.85rem 1.85rem;background:#b75d3a;color:#fff;border:1px solid #2a1d1026;border-radius:10px;transition:transform .2s ease,box-shadow .2s ease;}
.btn:hover{}
.btn-2{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-weight:800;letter-spacing:.02em;padding:.85rem 1.85rem;background:transparent;color:#b75d3a;border:2px solid #b75d3a;border-radius:10px;transition:.2s;}
.btn-2:hover{background:#b75d3a;color:#fff;}
.btn-ink{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-weight:800;padding:.85rem 1.85rem;background:#2a1d10;color:#f1e2c4;border-radius:10px;transition:.2s;}
.btn-ink:hover{background:#1c8073;}

.cat-tab{font-weight:700;background:#e6d4ad;color:#7e6849;border-radius:10px;border:1px solid #2a1d101a;transition:.15s;}
.cat-tab:hover{color:#b75d3a;}
.cat-tab.active{background:#b75d3a;color:#fff;border-color:#b75d3a;}

.nav-link{font-weight:700;color:#3a2a1a;padding:.4rem .6rem;border-radius:10px;transition:.18s;}
.nav-link:hover{color:#b75d3a;}
.nav-link.active{color:#b75d3a;}

.nav{display:flex;}
@media(max-width:1023px){
  .nav{position:fixed;top:0;right:0;bottom:0;width:80%;max-width:320px;flex-direction:column;align-items:stretch;gap:.6rem;background:#fbf3df;border-left:1px solid #2a1d1033;padding:6rem 1.5rem 2rem;transform:translateX(101%);transition:transform .22s ease;z-index:60;overflow-y:auto;}
  .nav.active{transform:translateX(0);}
  .menu-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);opacity:0;visibility:hidden;transition:opacity .2s;z-index:55;}
  .menu-overlay.active{opacity:1;visibility:visible;}
  body.menu-open{overflow:hidden;}
  .nav-link{background:#e6d4ad;padding:.7rem 1rem;}
}

.faq-answer{max-height:0;overflow:hidden;opacity:0;transition:max-height .3s ease,opacity .3s ease;}
.faq-item.active .faq-icon{transform:rotate(45deg);}
.faq-icon{transition:transform .2s ease;}

.back-to-top{opacity:0;visibility:hidden;transition:opacity .25s,transform .25s;}
.back-to-top.visible{opacity:1;visibility:visible;}

@media print{header,footer,.no-print{display:none;}}