body,html {
  margin: 0;
  padding: 0;
  font-family: 'Noto Serif SC', serif;
  background: #fff5f8;
  color: #444;
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2;
  pointer-events: none;
}
.cover {
  position: relative;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: linear-gradient(-45deg,#fbc2eb,#a6c1ee,#fad0c4,#ffd1ff,#ffe4e1);
  background-size: 400% 400%;
  animation: gradientBG 8s ease-in-out infinite;
  z-index: 1;
  padding: 0 1rem;
  box-sizing: border-box;
}
@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.cover-content {
  animation: fadeIn 2s ease-in-out;
  position: relative;
  z-index: 3;
  max-width: 95%;
}
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}
.title-svg text {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 110px;
  fill: #222;
}
.subtitle {
  font-size: 1.2rem;
  margin-top: 1rem;
  opacity: 0;
  animation: fadeInUp 1.5s cubic-bezier(0.4,0,0.2,1) forwards;
  animation-delay: 1.5s;
  word-wrap: break-word;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.scroll-down-arrow {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
  z-index: 3;
  transition: all 0.3s ease;
}
.scroll-down-arrow:hover svg path {
  stroke: #ffd700;
  filter: drop-shadow(0 0 6px #ffd700);
}
@keyframes bounce {
  0%,20%,50%,80%,100% { transform: translate(-50%,0); }
  40% { transform: translate(-50%,-16px); }
  60% { transform: translate(-50%,-8px); }
}
.content {
  padding: 4rem 1.2rem;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 3;
}
.section {
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(50px) scale(0.96);
  transition: all 1s cubic-bezier(0.4,0,0.2,1);
  filter: blur(8px);
}
.section.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}
.section h2 {
  font-size: 1.6rem;
  text-align: center;
  margin-bottom: 1.5rem;
  color: #c2185b;
}
.message-box {
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.6);
  padding: 1.8rem;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  line-height: 1.7;
  font-size: 1rem;
  min-height: 100px;
  white-space: pre-wrap;
  transition: transform 0.2s ease;
  font-family: 'KaiTi','STKaiti','Noto Serif SC',serif;
  color: #333;
  word-break: break-word;
}
.message-box:hover { transform: translateY(-3px); }
.footer {
  background: #111;
  text-align: center;
  padding: 1.2rem;
  color: white;
  font-family: 'Great Vibes', cursive;
  font-size: 1.1rem;
  letter-spacing: 1.5px;
  text-shadow: 0 0 6px rgba(255,215,0,0.5);
  border-top: 1px solid rgba(255,255,255,0.06);
  position: relative;
}
.music-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  opacity: 0.9;
  transition: opacity 1s ease;
  z-index: 20;
}
.music-hint.hide { opacity: 0; }
@media(max-width:768px) {
  .title-svg text { font-size: 80px; }
  .subtitle { font-size: 1rem; }
  .section h2 { font-size: 1.2rem; }
  .message-box { font-size: 0.9rem; padding: 1.2rem; }
}
@media(max-width:480px) {
  .title-svg text { font-size: 72px; }
  .subtitle { font-size: 0.9rem; }
  .footer { font-size: 1rem; }
}