/* ===========================================================
   5D FAN — stylesheet
   设计概念：剧场熄灯后的观众席（深茄紫）+ 立体眼镜的红/青色差错位。
   色差错位来自 "5D in 3D" 这个节目名本身，是全站唯一的高调元素。
   =========================================================== */

:root {
  /* 剧场基底 */
  --house:        #1E1230;  /* 观众席暗紫 */
  --house-lift:   #291A3F;  /* 抬起的表面 */
  --house-line:   #3D2A57;  /* 分隔线 */

  /* 文字 */
  --bone:         #F3EFE6;  /* 主文字，暖骨白 */
  --bone-dim:     #A99BBC;  /* 次级文字 */

  /* 立体眼镜双色 —— 只在色差错位处成对出现 */
  --left-eye:     #FF2E42;
  --right-eye:    #26D7D2;

  /* 追光，全站只用一次 */
  --spot:         #FFC24B;

  --shift:        0.042em;  /* 色差偏移量 */

  --measure:      64ch;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--house);
  color: var(--bone);
  font-family: "Instrument Sans", "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  font-synthesis-weight: none;
}

:lang(zh-Hans) { line-height: 1.85; letter-spacing: 0.01em; }

/* ---------- 双语切换 ---------- */
body[data-lang="en"] .zh { display: none; }
body[data-lang="zh"] .en { display: none; }

/* ---------- 排版基础 ---------- */
h1, h2, h3 {
  font-family: "Bricolage Grotesque", "Instrument Sans", "PingFang SC",
               "Microsoft YaHei", sans-serif;
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
}

p { margin: 0 0 1.1em; max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--spot);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 色差错位：全站的签名效果 ---------- */
.anaglyph {
  color: var(--bone);
  text-shadow:
    calc(var(--shift) * -1) 0 0 var(--left-eye),
    var(--shift) 0 0 var(--right-eye);
}

/* ---------- 骨架 ---------- */
.wrap {
  width: min(100% - 2.5rem, 1080px);
  margin-inline: auto;
}

/* ---------- 页眉 ---------- */
.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--house-line);
}

.mark {
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.mark sup { font-size: 0.5em; font-weight: 600; vertical-align: super; }

.lang-switch { display: flex; gap: 0.15rem; }

.lang-switch button {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  color: var(--bone-dim);
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.lang-switch button:hover { color: var(--bone); }
.lang-switch button[aria-pressed="true"] {
  color: var(--bone);
  border-color: var(--house-line);
  background: var(--house-lift);
}

/* ---------- 主视觉 ---------- */
.hero { padding: clamp(4rem, 13vh, 8rem) 0 clamp(3.5rem, 9vh, 6rem); }

.hero h1 {
  font-size: clamp(4.2rem, 20vw, 13rem);
  letter-spacing: -0.045em;
  margin-bottom: 2.2rem;
}

.hero .lede {
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.4;
  font-weight: 500;
  max-width: 34ch;
  margin-bottom: 1.4rem;
}
.hero .lede:lang(zh-Hans) { max-width: 22em; }

.hero .sub { color: var(--bone-dim); max-width: 46ch; }

/* ---------- 正文内链接：细下划线，悬停亮成追光色 ---------- */
p a, .facts a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--house-line);
  padding-bottom: 1px;
  transition: border-color 0.15s, color 0.15s;
}
p a:hover, .facts a:hover { border-color: var(--spot); color: var(--spot); }

/* ---------- 最新一期 ---------- */
.reel {
  padding: clamp(2.5rem, 7vh, 4rem) 0 clamp(3rem, 8vh, 5rem);
  border-top: 1px solid var(--house-line);
}

.reel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-bottom: 1.3rem;
}
.reel-head h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); }

.channel-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--bone-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--house-line);
  padding-bottom: 1px;
  transition: border-color 0.15s, color 0.15s;
}
.channel-link:hover { color: var(--spot); border-color: var(--spot); }

.reel-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  max-width: 880px;
  background: #000;
  border: 1px solid var(--house-line);
}
.reel-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- 节目区块（刻意不做成等大卡片） ---------- */
.show {
  padding: clamp(3rem, 8vh, 5rem) 0;
  border-top: 1px solid var(--house-line);
}

.show-head { margin-bottom: 1.6rem; }

.show h2 {
  font-size: clamp(2.4rem, 7.5vw, 4.6rem);
  margin-bottom: 0.5rem;
}

.show .kicker {
  color: var(--bone-dim);
  font-size: 0.92rem;
  font-weight: 500;
}

.show-body { display: grid; gap: 2rem 3.5rem; }
@media (min-width: 800px) {
  .show-body { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }
}

.facts { margin: 0; font-size: 0.95rem; }
.facts div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--house-line);
}
.facts dt { color: var(--bone-dim); }
.facts dd { margin: 0; }

/* Daily Big Talk 的走马灯：呼应「每天」这件事 */
.ticker {
  overflow: hidden;
  border-block: 1px solid var(--house-line);
  padding: 0.55rem 0;
  margin-bottom: 2rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track {
  display: flex;
  gap: 2.5rem;
  width: max-content;
  animation: roll 32s linear infinite;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--bone-dim);
  white-space: nowrap;
}
@keyframes roll { to { transform: translateX(-50%); } }

/* ---------- 服务说明（同时是商标使用证据的核心段落） ---------- */
.services {
  padding: clamp(3rem, 8vh, 5rem) 0;
  border-top: 1px solid var(--house-line);
}
.services h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 1.2rem; }
.services .statement {
  border-left: 3px solid var(--spot);
  padding-left: 1.2rem;
  font-size: 1.08rem;
}

/* ---------- 联系 ---------- */
.contact {
  padding: clamp(3rem, 8vh, 5rem) 0;
  border-top: 1px solid var(--house-line);
}
.contact h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 1.2rem; }

.links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.6rem; margin-top: 1.4rem; padding: 0; list-style: none; }
.links a {
  text-decoration: none;
  border-bottom: 1px solid var(--house-line);
  padding-bottom: 2px;
  transition: border-color 0.15s;
}
.links a:hover { border-color: var(--spot); }

/* ---------- 页脚 ---------- */
.colophon {
  border-top: 1px solid var(--house-line);
  padding: 2rem 0 3.5rem;
  color: var(--bone-dim);
  font-size: 0.85rem;
}
.colophon p { max-width: none; margin-bottom: 0.4rem; }

/* ---------- 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ticker-track { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}