/* =========================================================
   ShupaGo Animations — Round 4 · 2026-04-23
   ========================================================= */

/* ---------- scroll-behavior ---------- */
html { scroll-behavior: smooth; }

/* ---------- 3.1 card-hard hover 微浮起 ---------- */
.card-hard {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
a .card-hard:hover,
.card-hard-link:hover .card-hard {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--ink);
}

/* ---------- 3.2 btn hover ---------- */
.btn {
  transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(2px);
}
.btn-chili:hover { background: var(--chili-deep); }

/* ---------- 3.3 Hero fadeUp keyframe ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-fadeup           { animation: fadeUp 0.7s ease both; }
.hero-fadeup-delay-1   { animation: fadeUp 0.7s ease 0.15s both; }
.hero-fadeup-delay-2   { animation: fadeUp 0.7s ease 0.3s both; }

/* ---------- 3.5 Mobile menu slide-down ---------- */
.mobile-menu {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-top: 0 solid transparent;
  transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.3s ease, margin 0.3s ease, border-width 0.3s ease;
}
.mobile-menu.open {
  max-height: 80vh;
  opacity: 1;
  margin-top: 0.75rem;
  padding-top: 1rem;
  padding-bottom: 0.5rem;
  border-top-width: 1px;
  border-top-style: solid;
}