/* ═══════════════════════════════════════════════════════════
   Chimes 文旅版 — 中国城市屋檐
   ═══════════════════════════════════════════════════════════ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:         #e8dfd0;
  --text:       #58423c;
  --heading:    #3a2d2a;
  --accent:     #8B2323;
  --surface:    rgba(255,250,238,0.55);
  --shadow-warm: rgba(150,116,92,0.07);
  --roof-tint:  rgba(139,35,35,0.12);
  --transition-slow: 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
  --transition-fast: 0.35s ease;
}

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none; /* 禁止下拉刷新干扰拨帘 */
  font-family: "JetBrains Mono", ui-monospace, "Noto Sans SC", monospace;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent; /* 去掉触屏点击灰闪 */
}

/* ── 动态背景：跟随 accent 色微妙变化 ──────────────────────── */
body {
  background:
    radial-gradient(1100px 700px at 68% 12%, var(--surface), rgba(255,250,238,0) 62%),
    radial-gradient(900px 900px at 12% 92%, var(--shadow-warm), rgba(150,116,92,0) 58%),
    radial-gradient(600px 400px at 50% 55%, var(--roof-tint), transparent 70%),
    var(--bg);
  transition: background var(--transition-slow);
}

button { font-family: inherit; }

/* ── stage ───────────────────────────────────────────────── */
.stage {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  touch-action: none; /* 触屏拖动只拨帘、不滚屏 */
}

/* ── 檐下柔影（颜色跟随 accent）──────────────────────────── */
.shadow-stack {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.shadow {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(ellipse at center, var(--accent) 0%, transparent 68%);
  transition: background var(--transition-slow);
  user-select: none;
  -webkit-user-drag: none;
}

.shadow-1 {
  width: 720px;
  height: 240px;
  filter: blur(38px);
  opacity: 0.15;
  animation: shadowBreathe 12s ease-in-out infinite alternate;
}
.shadow-2 {
  width: 500px;
  height: 170px;
  top: 48%;
  filter: blur(16px);
  opacity: 0.20;
  animation: shadowBreathe 9s ease-in-out -3s infinite alternate;
}

@keyframes shadowBreathe {
  from { transform: translate(-50%, -50%) scale(1); }
  to   { transform: translate(-50%, -50%) scale(1.06); }
}

/* ── hanging strings canvas ───────────────────────────────── */
.strings {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  max-width: 100%;
  height: 100%;
  z-index: 15; /* 文字帘置于屋檐图前 */
  pointer-events: none;
}
.strings canvas { width: 100%; height: 100%; display: block; }

/* ── roof wrapper（色调滤镜层）────────────────────────────── */
.roof-wrapper {
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px; /* JS 按城市覆写 */
  height: auto;
  z-index: 10;
  filter: drop-shadow(0 14px 18px rgba(58,45,42,0.18));
  transition:
    filter var(--transition-slow),
    width 0.45s cubic-bezier(0.22, 0.61, 0.36, 1),
    top 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.roof {
  width: 100%;
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
  transition:
    opacity 0.5s ease,
    transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1),
    filter 0.6s ease;
  will-change: opacity, transform;
}

.roof.loading {
  opacity: 0;
  transform: scale(0.92) translateY(-12px);
  filter: blur(4px);
}

/* ── top bar ──────────────────────────────────────────────── */
.topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 40px;
}

.brand {
  font-family: "Cormorant", "Noto Serif SC", serif;
  font-size: 25px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--heading);
  text-decoration: none;
  transition: opacity 0.25s ease;
}
.brand:hover { opacity: 0.65; }

.nav-links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  opacity: 0.72;
  position: relative;
  padding-bottom: 3px;
  transition: opacity 0.25s ease, color var(--transition-fast);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease, background var(--transition-fast);
}
.nav-links a:hover { opacity: 1; }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links .dot { opacity: 0.4; }

.play-btn {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
  background: transparent;
  border: 1px solid rgba(88,66,60,0.42);
  border-radius: 999px;
  padding: 9px 24px;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease,
              transform 0.15s ease, box-shadow 0.3s ease;
}
.play-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px color-mix(in srgb, var(--accent) 30%, transparent);
}
.play-btn:active { transform: scale(0.95); }
.play-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ── city selectors（纯文字标签）──────────────────────────── */
.selector {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 12px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.selector-left  { left: 28px; }
.selector-right { right: 28px; }

.selector-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  opacity: 0.5;
  transition: opacity 0.3s ease, color 0.3s ease, transform 0.35s ease;
  position: relative;
  padding-bottom: 2px;
}

.selector-label::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease, background var(--transition-fast);
}

.selector-arrow {
  font-size: 20px;
  color: var(--accent);
  opacity: 0.4;
  transition: opacity 0.3s ease, transform 0.35s ease;
}

.selector:hover .selector-label {
  opacity: 1;
  color: var(--accent);
  transform: translateX(var(--dir, 0));
}
.selector-left:hover  .selector-label { --dir: -4px; }
.selector-right:hover .selector-label { --dir: 4px; }

.selector:hover .selector-label::after { transform: scaleX(1); }
.selector:hover .selector-arrow { opacity: 0.8; transform: translateX(var(--dir, 0)); }
.selector-left:hover  .selector-arrow { --dir: -6px; }
.selector-right:hover .selector-arrow { --dir: 6px; }

.selector:active .selector-label { transform: scale(0.96); }

/* ── bottom copy ──────────────────────────────────────────── */
.bottom-copy {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  padding: 0 40px 48px;
  pointer-events: none;
}
.bottom-copy .heading,
.bottom-copy .aside-block { pointer-events: auto; }

.heading { max-width: 55%; }

.eyebrow {
  font-size: 11.5px;
  letter-spacing: 0.07em;
  margin-bottom: 16px;
  opacity: 0.9;
  transition: color var(--transition-fast);
}
.eyebrow strong {
  font-family: "Cormorant", "Noto Serif SC", serif;
  font-style: italic;
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.01em;
  margin-right: 2px;
  transition: color var(--transition-slow);
}

h1 {
  font-family: "Cormorant", "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--heading);
}

.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  animation: charIn 0.55s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
  animation-delay: calc(var(--i) * 0.025s);
  transition: color var(--transition-slow);
}

/* 每第5个字符使用 accent 色点缀 */
.char[data-accent="1"] { color: var(--accent); }

@keyframes charIn {
  to { opacity: 1; transform: translateY(0); }
}

.aside-block {
  max-width: 320px;
  flex-shrink: 0;
}

.aside-text {
  font-size: 11.5px;
  line-height: 1.75;
  opacity: 0.85;
  transition: color var(--transition-fast);
}

.about-btn {
  margin-top: 18px;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
  background: transparent;
  border: 1px solid rgba(88,66,60,0.42);
  border-radius: 999px;
  padding: 8px 20px;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease,
              transform 0.15s ease, box-shadow 0.3s ease;
}
.about-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px color-mix(in srgb, var(--accent) 25%, transparent);
}
.about-btn:active { transform: scale(0.95); }
.about-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.fade-in {
  animation: fadeIn 0.8s ease 0.15s both;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 城市指示器 dots ─────────────────────────────────────── */
.city-dots {
  position: absolute;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.city-dot {
  width: 22px;
  height: 22px;
  padding: 8px;               /* 扩大触屏命中区，视觉仍是 6px 点 */
  border-radius: 50%;
  background: var(--text);
  background-clip: content-box;
  opacity: 0.25;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
  border: none;
  -webkit-tap-highlight-color: transparent;
}
.city-dot.active {
  opacity: 1;
  background: var(--accent);
  transform: scale(1.5);
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 40%, transparent);
}
.city-dot:hover:not(.active) {
  opacity: 0.6;
  transform: scale(1.2);
}

/* ── reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .char, .fade-in, .shadow { animation: none !important; }
  .char { opacity: 1; transform: none; }
  .fade-in { opacity: 1; transform: none; }
  .roof { transition: opacity 0.1s ease; }
}

/* ── responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .aside-block { display: none; }
  .heading { max-width: 100%; }
  .selector-left  { left: 8px; }
  .selector-right { right: 8px; }
  .topbar { padding: 18px 20px; }
  .bottom-copy { padding: 0 20px 36px; }
  .city-dots { bottom: 150px; }
}

@media (max-width: 600px) {
  .brand { font-size: 20px; }
  .selector-label { font-size: 9px; }
  .selector-arrow { font-size: 16px; }
  .play-btn { padding: 7px 16px; font-size: 9px; }
  .city-dots { display: none; } /* 小屏用左右切换按钮，圆点隐藏 */
  h1 { font-size: clamp(26px, 8vw, 40px); }
  .eyebrow { font-size: 10px; }
  .eyebrow strong { font-size: 15px; }
}

/* ── dark mode support ────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #1a1614;
    --text:    #b8a89c;
    --heading: #e8ddd4;
    --surface: rgba(255,250,238,0.03);
  }
  body {
    background:
      radial-gradient(1100px 700px at 68% 12%, var(--surface), rgba(255,250,238,0) 62%),
      radial-gradient(900px 900px at 12% 92%, rgba(150,116,92,0.04), rgba(150,116,92,0) 58%),
      radial-gradient(600px 400px at 50% 55%, var(--roof-tint), transparent 70%),
      var(--bg);
  }
  .roof-wrapper { filter: drop-shadow(0 14px 18px rgba(0,0,0,0.35)); }
}