/* ============================================================
   VOLT 音乐节
   创意大胆 · 酸性绿 + 品红撞色 · 超大字号 · 强动效
   ============================================================ */
:root {
  --bg: #08080a;
  --bg-2: #0e0e11;
  --ink: #f2f2f0;
  --ink-2: rgba(242, 242, 240, .62);
  --ink-3: rgba(242, 242, 240, .34);
  --acid: #c8ff00;
  --pink: #ff2d6f;
  --cyan: #00e5ff;
  --line: rgba(242, 242, 240, .12);
  --line-2: rgba(242, 242, 240, .24);

  --display: "Archivo Black", "Impact", "Arial Black", "PingFang SC", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

  --max: 1240px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: .92; }
p { margin: 0; }
svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.shell { width: min(var(--max), 100% - 44px); margin-inline: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 50px; padding: 0 28px;
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  border: 2px solid transparent; border-radius: 0;
  transition: all .2s var(--ease);
}
.btn-sm { height: 40px; padding: 0 18px; font-size: 11.5px; }
.btn-lg { height: 58px; padding: 0 38px; font-size: 14px; }

.btn-acid { background: var(--acid); color: #08080a; }
.btn-acid:hover { background: #fff; transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--acid); }

.btn-outline { color: var(--ink); border-color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--bg); transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--pink); }

/* ---------- 头部 ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.header.scrolled {
  background: rgba(8, 8, 10, .88);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { height: 76px; display: flex; align-items: center; gap: 40px; }

.brand {
  font-family: var(--display); font-size: 22px; letter-spacing: -.03em;
  display: flex; align-items: baseline;
}
.brand-dot { color: var(--acid); font-size: 26px; }

.nav { display: flex; gap: 30px; margin-left: auto; }
.nav a {
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-2); transition: color .2s ease; position: relative;
}
.nav a:hover { color: var(--acid); }

.header-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }

.lang-btn {
  display: inline-flex; align-items: center; gap: 4px;
  height: 34px; padding: 0 11px; background: transparent;
  border: 1.5px solid var(--line-2); color: var(--ink-3);
  font-family: var(--mono); font-size: 11.5px; font-weight: 700; letter-spacing: .06em;
  transition: all .2s ease;
}
.lang-btn:hover { border-color: var(--acid); }
.lang-cur { color: var(--acid); }
.lang-sep { opacity: .3; font-size: 11px; }
.lang-alt { opacity: .5; }

.burger { display: none; width: 40px; height: 34px; background: none; border: 0; padding: 8px; }
.burger span { display: block; height: 2px; background: var(--ink); margin-bottom: 6px; transition: .25s; }
.burger span:last-child { margin-bottom: 0; }

.mobile-nav {
  display: none; flex-direction: column; background: rgba(8, 8, 10, .98);
  border-bottom: 1px solid var(--line); max-height: 0; overflow: hidden;
  transition: max-height .35s var(--ease);
}
.mobile-nav.open { max-height: 380px; }
.mobile-nav a {
  padding: 18px 22px; font-family: var(--mono); font-size: 14px;
  letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

/* ---------- HERO ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 130px 0 0; overflow: hidden;
}
.hero-burst { position: absolute; inset: 0; pointer-events: none; }
.burst { position: absolute; border-radius: 50%; filter: blur(90px); }
.b1 { width: 520px; height: 520px; background: var(--pink); opacity: .28; top: -140px; left: -120px; animation: float1 16s ease-in-out infinite; }
.b2 { width: 460px; height: 460px; background: var(--acid); opacity: .16; bottom: 10%; right: -100px; animation: float2 20s ease-in-out infinite; }
.b3 { width: 380px; height: 380px; background: var(--cyan); opacity: .12; top: 40%; left: 45%; animation: float1 24s ease-in-out infinite reverse; }
@keyframes float1 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(60px, 50px) scale(1.15); } }
@keyframes float2 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-70px, -40px) scale(1.1); } }

.hero-inner { position: relative; z-index: 1; width: min(var(--max), 100% - 44px); }

.hero-top { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.tag {
  font-family: var(--mono); font-size: 11.5px; font-weight: 700; letter-spacing: .1em;
  padding: 7px 14px; border: 1.5px solid var(--line-2); color: var(--ink-2);
  text-transform: uppercase;
}
.tag:first-child { border-color: var(--acid); color: var(--acid); }

.hero-title {
  display: flex; flex-direction: column;
  font-family: var(--display); font-size: clamp(76px, 17vw, 240px);
  letter-spacing: -.055em; line-height: .82;
}
.hero-title .w { display: block; }
.hero-title .w.alt {
  color: transparent;
  -webkit-text-stroke: 2px var(--acid);
  margin-left: 6vw;
}

.hero-bottom {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 40px; flex-wrap: wrap; margin-top: 44px; padding-bottom: 70px;
}
.hero-sub { font-size: 16px; line-height: 1.85; color: var(--ink-2); max-width: 420px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-ticker {
  position: relative; overflow: hidden; border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line); padding: 14px 0;
}
.ticker-track {
  display: flex; gap: 34px; width: max-content;
  animation: ticker 28s linear infinite;
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  letter-spacing: .14em; color: var(--ink-3); text-transform: uppercase;
}
.ticker-track span:nth-child(even) { color: var(--acid); }
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- 区块 ---------- */
.section { padding: 110px 0; }
.sec-head { margin-bottom: 56px; }
.sec-head h2 {
  font-family: var(--display); font-size: clamp(38px, 7vw, 96px);
  letter-spacing: -.04em;
}
.sec-head p { margin-top: 18px; font-size: 15px; color: var(--ink-2); }

/* 阵容 */
.lineup { border-top: 1px solid var(--line); }
.artist-list { border-top: 1px solid var(--line); }
.artist {
  display: grid; grid-template-columns: 70px 1fr auto auto;
  align-items: center; gap: 24px;
  padding: 26px 8px; border-bottom: 1px solid var(--line);
  transition: background .25s ease, padding-left .25s ease;
  position: relative;
}
.artist:hover { background: rgba(200, 255, 0, .06); padding-left: 22px; }
.a-num {
  font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--ink-3);
}
.artist h3 {
  font-family: var(--display); font-size: clamp(24px, 3.4vw, 44px);
  letter-spacing: -.03em; transition: color .25s ease;
}
.artist:hover h3 { color: var(--acid); }
.a-role {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
  color: var(--ink-3); text-transform: uppercase;
}
.a-genre {
  font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .08em;
  padding: 6px 12px; border: 1.5px solid var(--pink); color: var(--pink);
  text-transform: uppercase; white-space: nowrap;
}

/* 日程 */
.schedule { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.days { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.day { border: 1.5px solid var(--line-2); padding: 30px 26px; transition: border-color .25s ease, transform .3s var(--ease); }
.day:hover { border-color: var(--acid); transform: translateY(-6px); }
.day-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 26px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.day-n { font-family: var(--display); font-size: 34px; letter-spacing: -.03em; }
.day-name { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--acid); text-transform: uppercase; }
.slots { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 18px; }
.slots li { display: flex; gap: 16px; align-items: baseline; }
.slots span { font-family: var(--mono); font-size: 12px; color: var(--ink-3); flex: none; }
.slots b { font-size: 14.5px; font-weight: 600; color: var(--ink-2); }

/* 场地 */
.venue-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.venue-copy h2 { font-family: var(--display); font-size: clamp(34px, 5vw, 68px); letter-spacing: -.04em; margin-bottom: 24px; }
.venue-copy p { font-size: 15px; line-height: 1.9; color: var(--ink-2); max-width: 440px; }
.venue-facts {
  list-style: none; padding: 0; margin: 40px 0 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  border-top: 1px solid var(--line); padding-top: 30px;
}
.venue-facts li { display: flex; flex-direction: column; gap: 6px; }
.venue-facts b { font-family: var(--display); font-size: 30px; color: var(--acid); letter-spacing: -.02em; }
.venue-facts span { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; color: var(--ink-3); text-transform: uppercase; }
.venue-art svg { width: 100%; height: auto; }

/* CTA */
.cta-sec { padding: 90px 0 120px; }
.cta-inner { text-align: center; }
.cta-inner h2 {
  font-family: var(--display); font-size: clamp(44px, 10vw, 140px);
  letter-spacing: -.05em; color: var(--acid); line-height: .9;
}
.cta-inner p { margin: 26px 0 38px; font-size: 15px; color: var(--ink-2); }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer-brand { font-family: var(--display); font-size: 20px; letter-spacing: -.03em; }
.footer-meta { display: flex; gap: 26px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; color: var(--ink-3); }

/* 动效 */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .8s var(--ease) var(--d, 0s), transform .8s var(--ease) var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }
[data-i18n] { transition: opacity .2s ease; }
body.lang-switching [data-i18n] { opacity: .3; transition: opacity .15s ease; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .nav { display: none; }
  .burger { display: block; }
  .mobile-nav { display: flex; }
  .days { grid-template-columns: 1fr; }
  .venue-grid { grid-template-columns: 1fr; gap: 44px; }
  .venue-art { order: -1; }
}

@media (max-width: 640px) {
  .shell, .hero-inner { width: calc(100% - 32px); }
  .header-inner { height: 66px; }
  .header-right .btn { display: none; }
  .hero { padding-top: 108px; min-height: auto; }
  .hero-bottom { padding-bottom: 48px; margin-top: 32px; }
  .hero-title { font-size: clamp(64px, 22vw, 120px); }
  .hero-title .w.alt { margin-left: 0; -webkit-text-stroke-width: 1.5px; }
  .section { padding: 72px 0; }
  .artist { grid-template-columns: 34px 1fr; gap: 6px 14px; row-gap: 10px; padding: 20px 4px; }
  .a-role { grid-column: 2; }
  .a-genre { grid-column: 2; justify-self: start; }
  .venue-facts { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .hero-cta .btn { flex: 1; min-width: 140px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}