:root {
  --bg: #0a0a0f;
  --card-bg: rgba(255, 255, 255, 0.05);
  --text: #eaeaea;
  --text-muted: #a0a0b0;
  --accent: #b44dff;
  --accent2: #00e5ff;
  --radius: 28px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(ellipse at 20% 0%, #2a1050 0%, transparent 50%),
                    radial-gradient(ellipse at 80% 100%, #0a3040 0%, transparent 50%);
  background-attachment: fixed;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 演示提示条 */
.demo-notice {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #aaa;
  text-align: center;
  padding: 12px 20px;
  font-size: 0.85rem;
}
.demo-notice a { color: var(--accent2); }

/* Hero */
.site-hero {
  position: relative;
  padding: 80px 24px 60px;
  text-align: center;
  overflow: hidden;
}
.site-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 20%, rgba(180,77,255,0.3) 0%, transparent 60%);
  z-index: 0;
}
.site-hero > * { position: relative; z-index: 1; }

.hero-content h1 {
  font-size: clamp(3rem, 15vw, 5rem);
  font-weight: 900;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.8rem;
  line-height: 1.1;
}
.hero-sub {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: 2rem;
}

/* 倒计时 */
.countdown {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.cd-item {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 14px 16px;
  border-radius: 20px;
  min-width: 75px;
  text-align: center;
}
.cd-item span {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.cd-item small { font-size: 0.8rem; color: var(--text-muted); }
.cd-ended {
  display: inline-block;
  margin-top: 1rem;
  background: rgba(255,255,255,0.1);
  padding: 12px 32px;
  border-radius: 40px;
  font-size: 1.2rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  color: #fff;
}

/* 日期地点 - 明确分成两行 */
.event-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin: 30px 0;
}
.meta-item {
  font-size: 1.2rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  padding: 12px 28px;
  border-radius: 40px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.06);
}

/* 卡片 */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: 30px 24px;
  margin-bottom: 35px;
  border: 1px solid rgba(255,255,255,0.08);
}

h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 25px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 描述 */
.event-desc p { margin-bottom: 1em; color: var(--text-muted); }

/* 亮点横向滑动 */
.highlights-scroll {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.highlights-scroll::-webkit-scrollbar { display: none; }
.highlight-card {
  min-width: 200px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 24px;
  padding: 24px 20px;
  scroll-snap-align: start;
  backdrop-filter: blur(10px);
}
.highlight-icon {
  font-size: 2rem;
  margin-bottom: 15px;
}

/* 日程时间轴 */
.timeline {
  position: relative;
  padding-left: 30px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
}
.schedule-day {
  margin-bottom: 30px;
  position: relative;
}
.schedule-day::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
}
.schedule-day h3 {
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 12px;
}
.schedule-day ul { list-style: none; padding: 0; }
.schedule-day li {
  color: var(--text-muted);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* 报名表单 */
.signup-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 20px;
}
.signup-form .full-width { grid-column: 1; }
.signup-form label { font-weight: 600; display: block; margin-bottom: 6px; }
.signup-form input, .signup-form textarea {
  width: 100%;
  padding: 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px;
  color: #fff;
  font-size: 1rem;
}
.signup-form input:focus, .signup-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(180,77,255,0.2);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  border: none;
  padding: 18px;
  border-radius: 40px;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}
.btn-primary:hover { filter: brightness(1.2); }

/* 分享悬浮胶囊 */
.share-float {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 20, 30, 0.85);
  backdrop-filter: blur(20px);
  padding: 8px 24px;
  border-radius: 50px;
  display: flex;
  gap: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.15);
  z-index: 100;
}
.share-float a, .share-float button {
  background: transparent;
  border: none;
  color: #ccc;
  font-size: 1.4rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: 0.2s;
  cursor: pointer;
}
.share-float a:hover, .share-float button:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.site-footer {
  text-align: center;
  padding: 30px 20px 100px; /* 给悬浮按钮留空间 */
  color: #555;
  font-size: 0.85rem;
}
.site-footer a { color: var(--accent2); }

@media (min-width: 768px) {
  .highlights-scroll { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); overflow: visible; }
  .signup-form { grid-template-columns: 1fr 1fr; }
  .signup-form .full-width { grid-column: 1 / -1; }
}