* { box-sizing: border-box; }
:root {
  --bg: #ffeef3;
  --pink-deep: #b83a6e;
  --pink: #ff7aa8;
  --pink-soft: #ffd4e1;
  --pink-cream: #fff1f5;
  --ink: #4a1f33;
  --accent: #ff5c93;
}
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  background: linear-gradient(180deg, #ffe4ec 0%, #fff1f5 60%, #fffafb 100%);
  color: var(--ink);
  letter-spacing: 0.02em;
}
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 16px 142px;
  position: relative;
  z-index: 2;
}
.card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--pink-soft);
  border-radius: 22px;
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 10px 24px rgba(184, 58, 110, 0.08);
}
.hero { width: 100%; border-radius: 14px; display: block; }
.brand-strip {
  position: relative;
  z-index: 5;
  padding: 10px 12px 0;
  background: linear-gradient(180deg, rgba(255, 122, 168, 0.18), rgba(255, 238, 243, 0));
}
.brand-strip-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}
.brand-logo-full {
  width: min(95vw, 640px);
  height: auto;
  display: block;
  border-radius: 14px;
  opacity: .95;
  border: 1px solid rgba(255, 122, 168, 0.3);
  box-shadow: 0 5px 14px rgba(184, 58, 110, 0.12);
}
.tag { margin: 12px 0 0; font-size: 12px; color: var(--pink-deep); font-weight: 700; letter-spacing: .2em; }
h1, h2, h3 {
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  letter-spacing: 0.05em;
  color: var(--pink-deep);
}
h1 { margin: 4px 0 2px; font-size: 34px; line-height: 1.2; }
h2 { margin: 0 0 10px; font-size: 24px; }
.sub { margin: 0 0 10px; color: #c84a7a; font-size: 15px; font-weight: 600; }
ul { margin: 0; padding-left: 18px; color: #7a4a5c; line-height: 1.8; font-size: 15px; }
.reward-list { margin-top: 4px; }

.kv-media {
  position: relative;
  width: 100%;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--pink-soft);
  background: linear-gradient(135deg, var(--pink-soft), #ffe9f0);
  aspect-ratio: 900 / 383;
  margin-top: 8px;
}
.kv-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.media-placeholder-text {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--pink-deep);
  font-weight: 700;
  font-size: 14px;
}
.kv-media.media-fallback .media-placeholder-text { display: flex; }

.event-info {
  background: linear-gradient(135deg, var(--pink-soft), #ffe9f0);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid var(--pink-soft);
}
.event-info p { margin: 6px 0; color: var(--pink-deep); font-size: 15px; }
.event-info strong { color: var(--accent); margin-right: 4px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.activity-card {
  border: 1px solid var(--pink-soft);
  background: var(--pink-cream);
  border-radius: 14px;
  padding: 10px;
  position: relative;
  overflow: hidden;
}
.activity-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--pink-soft);
  display: block;
}
.activity-thumb-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--pink-soft), #ffe9f0);
  color: var(--pink-deep);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.4;
}
.activity-thumb-fallback small { font-size: 11px; font-weight: 400; color: #c77b96; }
.activity-card h3 {
  margin: 8px 0 0;
  font-size: 15px;
}
.requirement {
  margin: 6px 0 0;
  color: #8b556d;
  font-size: 12px;
  line-height: 1.6;
}

.benefits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.benefit-card {
  border-radius: 14px;
  border: 1px solid var(--pink-soft);
  padding: 12px;
  background: linear-gradient(145deg, #fff5f9, #ffe4ec);
}
.benefit-card h3 { margin: 0 0 6px; font-size: 16px; }
.benefit-card p { margin: 0; font-size: 13px; color: #7a4a5c; line-height: 1.7; }
.benefit-card strong { color: var(--accent); }

.floating-btn {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  width: calc(100% - 20px);
  max-width: 420px;
  text-align: center;
  text-decoration: none;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.7);
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 26px rgba(255, 92, 147, 0.36);
  z-index: 9001;
  pointer-events: auto;
  transition: opacity .2s ease, transform .2s ease;
}
.floating-note {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 76px;
  width: calc(100% - 24px);
  max-width: 430px;
  margin: 0;
  padding: 7px 12px;
  text-align: center;
  font-size: 11px;
  line-height: 1.45;
  color: #8b556d;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--pink-soft);
  border-radius: 10px;
  backdrop-filter: blur(4px);
  z-index: 9000;
  transition: opacity .2s ease, transform .2s ease;
}

.invite-mask {
  position: fixed;
  inset: 0;
  background: rgba(74, 31, 51, .5);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  z-index: 12000;
}
.invite-open .floating-note,
.invite-open .floating-btn {
  opacity: 0;
  pointer-events: none;
}
.invite-card {
  width: min(92vw, 380px);
  max-height: min(88vh, 760px);
  background: linear-gradient(160deg, #ff7aa8, #ffb4cd);
  border-radius: 20px;
  padding: 10px 10px 12px;
  text-align: center;
  box-shadow: 0 16px 44px rgba(184, 58, 110, .35);
  border: 1px solid rgba(255, 255, 255, 0.6);
  overflow: auto;
}

.invite-poster {
  position: relative;
  min-height: 0;
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  background: linear-gradient(135deg, #ffd4e1, #fff1f5);
  overflow: hidden;
}
.invite-poster-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.invite-poster-fallback-text {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
  color: var(--pink-deep);
}
.invite-poster.poster-fallback .invite-poster-fallback-text { display: flex; }
.ip-tag { margin: 0; font-size: 13px; font-weight: 800; letter-spacing: .3em; color: var(--accent); }
.ip-title {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 36px;
  line-height: 1.2;
  color: var(--pink-deep);
  font-weight: 800;
}
.ip-sub { margin: 0; font-size: 14px; color: #b83a6e; font-weight: 600; }

.invite-card button {
  margin-top: 14px;
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 999px;
  background: linear-gradient(160deg, #fff, #ffe4ec);
  color: var(--pink-deep);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .06em;
  min-width: 146px;
  padding: 13px 30px;
  line-height: 1.1;
  box-shadow:
    0 8px 18px rgba(184, 58, 110, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(3px);
}

.breathing { animation: breathing 2.4s ease-in-out infinite; }
.reveal { opacity: 0; transform: translateY(18px); transition: .55s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }

.decor {
  position: fixed;
  pointer-events: none;
  opacity: .35;
  z-index: 1;
}
.decor-cloud {
  top: 80px; left: -20px; width: 120px; height: 46px;
  background: radial-gradient(circle at 20% 70%, #fff 32%, transparent 33%),
              radial-gradient(circle at 45% 45%, #fff 30%, transparent 31%),
              radial-gradient(circle at 68% 65%, #fff 35%, transparent 36%);
}
.decor-flower {
  right: 16px; top: 220px; width: 28px; height: 28px; border-radius: 50%;
  background: var(--pink);
  box-shadow: -14px 0 0 var(--pink), 14px 0 0 var(--pink), 0 -14px 0 var(--pink), 0 14px 0 var(--pink);
}
.decor-heart {
  left: 18px; bottom: 140px; width: 30px; height: 28px;
  background:
    radial-gradient(circle at 30% 35%, var(--pink) 50%, transparent 51%),
    radial-gradient(circle at 70% 35%, var(--pink) 50%, transparent 51%);
  position: fixed;
}
.decor-heart::after {
  content: "";
  position: absolute;
  left: 15%;
  top: 35%;
  width: 70%;
  height: 70%;
  background: var(--pink);
  transform: rotate(45deg);
  border-radius: 4px;
}

@keyframes breathing { 0%,100% { transform: translateX(-50%) scale(1); } 50% { transform: translateX(-50%) scale(1.03);} }

@media (max-width: 768px) {
  .brand-strip { padding: 8px 8px 0; }
  .brand-logo-full {
    width: min(95vw, 520px);
    border-radius: 12px;
  }
  .grid { grid-template-columns: 1fr 1fr; }
  .benefits { grid-template-columns: 1fr; }
  h1 { font-size: 30px; }
  .container { padding-top: 10px; }
  .kv-media { margin-top: 6px; }
  .floating-note {
    bottom: 78px;
    font-size: 10.5px;
    padding: 6px 10px;
  }
  .invite-card {
    width: min(92vw, 360px);
    max-height: 84vh;
  }
}

@media (max-width: 430px) {
  .brand-logo-full { width: 96vw; }
  .container {
    padding-top: 8px;
    padding-left: 12px;
    padding-right: 12px;
  }
  .invite-card {
    border-radius: 18px;
    padding: 8px 8px 10px;
  }
  .invite-poster {
    border-radius: 14px;
  }
  .invite-card button {
    width: 100%;
    margin-top: 10px;
    min-width: 0;
    padding: 12px 18px;
    font-size: 16px;
  }
}