/* ============ 基础 ============ */
:root {
  --bg: #04050c;
  --bg-soft: #0a0e1f;
  --ink: #eef0f8;
  --muted: #9aa3c0;
  --gold: #f6c76a;
  --gold-deep: #e09b3d;
  --cyan: #6fe3ff;
  --pink: #ff7aa8;
  --line: rgba(255, 255, 255, 0.08);
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(246, 199, 106, 0.35); color: #fff; }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ============ 背景画布与噪点 ============ */
#sky {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

.wrap {
  position: relative;
  z-index: 3;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.12em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #1a1305;
  font-weight: 600;
  box-shadow: 0 6px 24px rgba(246, 199, 106, 0.28);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 34px rgba(246, 199, 106, 0.4);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--line);
  color: var(--muted);
}

.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ============ 导航 ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
  background: rgba(4, 5, 12, 0.72);
  backdrop-filter: blur(14px);
  padding: 12px 32px;
  box-shadow: 0 1px 0 var(--line);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 21px;
  letter-spacing: 0.18em;
}

.nav-brand span {
  color: var(--gold);
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 14.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.nav-links a { position: relative; transition: color 0.25s ease; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }

.nav-right { display: flex; align-items: center; gap: 18px; }

.nav-cta { padding: 10px 22px; font-size: 13.5px; }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  z-index: 3;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
}

.hero-kicker {
  font-size: 14px;
  letter-spacing: 0.5em;
  color: var(--cyan);
  margin-bottom: 30px;
}

.hero-title .line-1 {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(52px, 9vw, 116px);
  letter-spacing: 0.14em;
  line-height: 1.25;
  background: linear-gradient(180deg, #fff3d6 0%, var(--gold) 55%, var(--gold-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-shadow: 0 0 80px rgba(246, 199, 106, 0.35);
  filter: drop-shadow(0 4px 30px rgba(246, 199, 106, 0.25));
}

.hero-title .line-2 {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(13px, 2vw, 20px);
  letter-spacing: 0.72em;
  color: var(--muted);
  margin-top: 18px;
  text-indent: 0.72em;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  font-size: 16px;
  letter-spacing: 0.22em;
  color: var(--ink);
}

.hero-meta .dot { color: var(--gold); }

.hero-actions {
  display: flex;
  gap: 18px;
  margin-top: 46px;
}

.hero-hint {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12.5px;
  letter-spacing: 0.3em;
  color: rgba(154, 163, 192, 0.8);
  animation: hintPulse 2.6s ease-in-out infinite;
}

@keyframes hintPulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* ============ 分区通用 ============ */
.section { position: relative; z-index: 3; padding: 110px 0; }

.section-head { margin-bottom: 56px; }

.section-kicker {
  font-size: 12.5px;
  letter-spacing: 0.55em;
  color: var(--gold);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 600;
  letter-spacing: 0.16em;
}

/* ============ 关于 ============ */
.about { border-top: 1px solid var(--line); }

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.about-lead {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.9;
  color: var(--ink);
}

.about-lead em { color: var(--gold); font-style: normal; }

.about-body { color: var(--muted); font-size: 15.5px; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 20px;
  background: rgba(255, 255, 255, 0.025);
  text-align: center;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.stat:hover { border-color: rgba(246, 199, 106, 0.45); transform: translateY(-3px); }

.stat dt {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 600;
  color: var(--gold);
}

.stat dd { font-size: 13px; color: var(--muted); letter-spacing: 0.14em; margin-top: 6px; }

/* ============ 节目单 ============ */
.schedule { background: linear-gradient(180deg, rgba(10, 14, 31, 0.5), rgba(4, 5, 12, 0.2)); }

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.timeline-day {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 30px 28px;
  background: rgba(255, 255, 255, 0.02);
}

.day-title {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.12em;
  color: var(--gold);
  padding-bottom: 18px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.day-list { display: flex; flex-direction: column; gap: 24px; }

.item { display: flex; gap: 18px; }

.item-time {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--cyan);
  letter-spacing: 0.08em;
  padding-top: 4px;
  min-width: 52px;
}

.item-name { font-size: 16px; font-weight: 600; letter-spacing: 0.05em; }

.item-desc { font-size: 13.5px; color: var(--muted); margin-top: 5px; }

.tag {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  border: 1px solid;
}

.tag-light { color: var(--cyan); border-color: rgba(111, 227, 255, 0.4); background: rgba(111, 227, 255, 0.08); }
.tag-fire { color: var(--gold); border-color: rgba(246, 199, 106, 0.4); background: rgba(246, 199, 106, 0.08); }
.tag-music { color: var(--pink); border-color: rgba(255, 122, 168, 0.4); background: rgba(255, 122, 168, 0.08); }
.tag-heart { color: #ff9de2; border-color: rgba(255, 157, 226, 0.4); background: rgba(255, 157, 226, 0.08); }
.tag-market { color: #a8e6a1; border-color: rgba(168, 230, 161, 0.4); background: rgba(168, 230, 161, 0.08); }

/* ============ 亮点 ============ */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 34px 26px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 160px at 50% -10%, rgba(246, 199, 106, 0.16), transparent 65%);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.card:hover { transform: translateY(-6px); border-color: rgba(246, 199, 106, 0.4); }
.card:hover::before { opacity: 1; }

.card-ico { font-size: 34px; line-height: 1; margin-bottom: 20px; }

.card-title {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.card-desc { font-size: 13.5px; color: var(--muted); }

/* ============ 票价 ============ */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 38px 30px;
  background: rgba(255, 255, 255, 0.02);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.price:hover { transform: translateY(-4px); border-color: rgba(246, 199, 106, 0.4); }

.price-hot {
  border-color: rgba(246, 199, 106, 0.55);
  background: linear-gradient(165deg, rgba(246, 199, 106, 0.1), rgba(255, 255, 255, 0.02) 55%);
  box-shadow: 0 18px 60px rgba(246, 199, 106, 0.12);
}

.price-badge {
  position: absolute;
  top: 18px;
  right: -1px;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #1a1305;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  padding: 6px 16px;
  border-radius: 999px 0 0 999px;
}

.price-name { font-family: var(--font-display); font-size: 18px; letter-spacing: 0.16em; color: var(--muted); }

.price-amount {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 600;
  color: var(--ink);
  margin: 12px 0 26px;
  line-height: 1.1;
}

.price-amount span { font-size: 22px; color: var(--gold); margin-right: 4px; }

.price-hot .price-amount { color: var(--gold); }

.price-list { flex: 1; display: flex; flex-direction: column; gap: 12px; margin-bottom: 30px; }

.price-list li {
  font-size: 14px;
  color: var(--muted);
  padding-left: 24px;
  position: relative;
}

.price-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--gold) 40%, transparent 65%);
}

.price .btn { text-align: center; }

.tickets-note {
  margin-top: 34px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ============ FAQ ============ */
.faq-list { display: flex; flex-direction: column; gap: 14px; max-width: 820px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.3s ease;
}

.faq-item[open] { border-color: rgba(246, 199, 106, 0.45); }

.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 20px;
  color: var(--gold);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--muted);
}

/* ============ 页脚 ============ */
.footer {
  position: relative;
  z-index: 3;
  border-top: 1px solid var(--line);
  padding: 56px 0 30px;
  background: rgba(4, 5, 12, 0.6);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 44px;
}

.footer-brand { font-family: var(--font-display); font-size: 22px; letter-spacing: 0.2em; }

.footer-sub { font-size: 11.5px; letter-spacing: 0.4em; color: var(--muted); margin-top: 8px; }

.footer-links { display: flex; gap: 28px; font-size: 14px; color: var(--muted); }

.footer-links a:hover { color: var(--gold); }

.footer-note { font-size: 13.5px; color: var(--muted); letter-spacing: 0.1em; text-align: right; }

.footer-copy {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  text-align: center;
  font-size: 12.5px;
  color: rgba(154, 163, 192, 0.7);
  letter-spacing: 0.12em;
}

/* ============ 滚动进入动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
}

@media (max-width: 720px) {
  .nav { padding: 16px 20px; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(280px, 78vw);
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    padding: 40px 36px;
    background: rgba(4, 5, 12, 0.96);
    backdrop-filter: blur(14px);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
    font-size: 17px;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-burger { display: flex; z-index: 60; }
  .nav-cta { display: none; }
  .section { padding: 84px 0; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; width: 100%; max-width: 300px; }
  .footer-grid { flex-direction: column; }
  .footer-note { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ 质感增强：星云背景 ============ */
.nebula {
  position: fixed;
  inset: -12%;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(44% 38% at 16% 20%, rgba(84, 48, 150, 0.5), transparent 66%),
    radial-gradient(38% 32% at 84% 16%, rgba(18, 96, 128, 0.46), transparent 66%),
    radial-gradient(50% 42% at 74% 80%, rgba(132, 44, 88, 0.4), transparent 66%),
    radial-gradient(30% 26% at 26% 84%, rgba(140, 100, 34, 0.32), transparent 66%);
  filter: blur(28px);
  animation: nebulaDrift 30s ease-in-out infinite alternate;
}

@keyframes nebulaDrift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to { transform: translate3d(2.5%, 2%, 0) scale(1.08); }
}

/* ============ 质感增强：滚动进度条 ============ */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--pink));
  box-shadow: 0 0 12px rgba(246, 199, 106, 0.8);
  transition: width 0.1s linear;
}

/* ============ 质感增强：Hero 霓虹光晕 ============ */
.hero-title .line-1 {
  animation: titleGlow 4s ease-in-out infinite;
}

@keyframes titleGlow {
  0%, 100% { filter: drop-shadow(0 0 24px rgba(246, 199, 106, 0.3)); }
  50% { filter: drop-shadow(0 0 64px rgba(246, 199, 106, 0.6)); }
}

.hero-kicker {
  text-shadow: 0 0 18px rgba(111, 227, 255, 0.55);
}

.hero-meta {
  text-shadow: 0 0 22px rgba(246, 199, 106, 0.35);
}

.hero-hint {
  text-shadow: 0 0 14px rgba(154, 163, 192, 0.5);
}

/* hero 底部向下渐隐，让内容区过渡更自然 */
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 160px;
  background: linear-gradient(180deg, transparent, rgba(4, 5, 12, 0.9));
  pointer-events: none;
}

/* ============ 质感增强：按钮霓虹 ============ */
.btn-gold {
  box-shadow: 0 0 22px rgba(246, 199, 106, 0.38), 0 8px 30px rgba(224, 155, 61, 0.3);
}

.btn-gold:hover {
  box-shadow: 0 0 46px rgba(246, 199, 106, 0.62), 0 12px 42px rgba(224, 155, 61, 0.48);
}

.btn-ghost {
  box-shadow: inset 0 0 18px rgba(255, 255, 255, 0.05), 0 0 14px rgba(111, 227, 255, 0.14);
}

.btn-ghost:hover {
  box-shadow: 0 0 30px rgba(111, 227, 255, 0.28);
}

.btn-outline:hover {
  box-shadow: 0 0 26px rgba(246, 199, 106, 0.22);
}

/* ============ 质感增强：导航 ============ */
.nav-brand {
  text-shadow: 0 0 20px rgba(246, 199, 106, 0.45);
}

.nav-links a:hover {
  text-shadow: 0 0 14px rgba(246, 199, 106, 0.55);
}

/* ============ 质感增强：分区分隔与标题 ============ */
.section {
  box-shadow: inset 0 1px 0 rgba(246, 199, 106, 0.06);
}

.section-kicker {
  text-shadow: 0 0 16px rgba(246, 199, 106, 0.5);
}

.section-title {
  text-shadow: 0 0 34px rgba(246, 199, 106, 0.12);
}

/* ============ 质感增强：卡片与统计 ============ */
.card {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.card:hover {
  border-color: rgba(246, 199, 106, 0.55);
  box-shadow: 0 0 34px rgba(246, 199, 106, 0.16), 0 22px 50px rgba(0, 0, 0, 0.45);
}

.stat:hover {
  border-color: rgba(246, 199, 106, 0.55);
  box-shadow: 0 0 30px rgba(246, 199, 106, 0.14), 0 16px 40px rgba(0, 0, 0, 0.4);
}

.tag { box-shadow: 0 0 12px rgba(0, 0, 0, 0.3); }

/* ============ 质感增强：票价卡 ============ */
.price:hover {
  box-shadow: 0 0 30px rgba(246, 199, 106, 0.14), 0 18px 44px rgba(0, 0, 0, 0.42);
}

.price-hot {
  position: relative;
  overflow: hidden;
}

.price-hot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(320px 130px at 32% 0%, rgba(246, 199, 106, 0.28), transparent 62%);
  animation: hotPulse 4.5s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes hotPulse {
  from { opacity: 0.55; transform: translateY(0); }
  to { opacity: 1; transform: translateY(10px); }
}

/* ============ 质感增强：FAQ ============ */
.faq-item[open] {
  box-shadow: 0 0 26px rgba(246, 199, 106, 0.12);
}

/* ============ 质感增强：页脚 ============ */
.footer-brand {
  text-shadow: 0 0 22px rgba(246, 199, 106, 0.45);
}

.footer {
  box-shadow: inset 0 1px 0 rgba(246, 199, 106, 0.06);
}

/* ============ 质感增强：详情手风琴箭头发光 ============ */
.faq-item summary::after {
  text-shadow: 0 0 12px rgba(246, 199, 106, 0.8);
}

@media (prefers-reduced-motion: reduce) {
  .nebula, .hero-title .line-1, .price-hot::after { animation: none; }
}