/* About page — 依赖 style.css 中的 :root 变量 */

.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;
}

.about-page .site-header__nav a.is-active,
.about-page .site-nav-drawer__nav a.is-active {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.about-page main > .section.about-split,
.about-page main > .section.about-team,
.about-page main > .section.about-showreel {
  min-height: 0;
  height: auto;
}

/* About 首屏也显示顶栏（与漂浮模块同屏） */
body.about-page .site-header {
  transform: translateY(0) !important;
  visibility: visible !important;
  pointer-events: auto !important;
  opacity: 1 !important;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

/* —— 模块 1：M&V 巨字 + 向左无缝漂浮 —— */
.about-hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  overflow: hidden;
  padding-top: var(--header-h);
  box-sizing: border-box;
}

.about-hero__viewport {
  width: 100%;
  overflow: hidden;
}

.about-hero__marquee {
  width: 100%;
  padding: clamp(1rem, 4vh, 2.5rem) 0;
}

.about-hero__track {
  display: flex;
  flex-wrap: nowrap;
  width: max-content;
  will-change: transform;
  animation: about-hero-drift 14s linear infinite;
}

@keyframes about-hero-drift {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-33.333333%);
  }
}

.about-hero__chunk {
  display: inline-flex;
  align-items: baseline;
  flex-shrink: 0;
  padding: 0 clamp(1.75rem, 10vw, 6.5rem);
  font-weight: 800;
  font-size: clamp(4.5rem, 42vw, 22rem);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: var(--black);
  text-transform: uppercase;
}

/* 三组 M&V 错开相位，避免齐刷刷 */
.about-hero__chunk:nth-child(2) .about-hero__letter,
.about-hero__chunk:nth-child(2) .about-hero__amp {
  animation-delay: -2.3s;
}

.about-hero__chunk:nth-child(3) .about-hero__letter,
.about-hero__chunk:nth-child(3) .about-hero__amp {
  animation-delay: -4.6s;
}

.about-hero__letter {
  display: inline-block;
  transform-origin: 50% 65%;
  will-change: transform;
}

.about-hero__chunk > .about-hero__letter:first-child {
  animation: about-hero-float-m 6.9s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

.about-hero__chunk > .about-hero__letter:last-child {
  animation: about-hero-float-v 6.2s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

.about-hero__amp {
  display: inline-block;
  font-size: 0.35em;
  font-weight: 800;
  margin: 0 0.04em;
  opacity: 0.92;
  transform-origin: 50% 58%;
  animation: about-hero-float-amp 5.4s cubic-bezier(0.45, 0, 0.55, 1) infinite;
  animation-delay: -0.65s;
}

/* M：更大上下起伏 + 略向左漂 */
@keyframes about-hero-float-m {
  0% {
    transform: translate(0, 0.1em) rotate(-0.75deg);
  }
  18% {
    transform: translate(-0.09em, -0.2em) rotate(0.55deg);
  }
  38% {
    transform: translate(-0.17em, 0.11em) rotate(-0.45deg);
  }
  58% {
    transform: translate(-0.11em, -0.17em) rotate(0.65deg);
  }
  78% {
    transform: translate(-0.05em, 0.15em) rotate(-0.35deg);
  }
  100% {
    transform: translate(0, 0.1em) rotate(-0.75deg);
  }
}

/* &：相对略小，但仍明显上下动 */
@keyframes about-hero-float-amp {
  0% {
    transform: translate(0, -0.05em) rotate(0deg);
  }
  25% {
    transform: translate(-0.07em, -0.18em) rotate(-0.65deg);
  }
  50% {
    transform: translate(-0.13em, 0.12em) rotate(0.5deg);
  }
  75% {
    transform: translate(-0.08em, -0.1em) rotate(-0.3deg);
  }
  100% {
    transform: translate(0, -0.05em) rotate(0deg);
  }
}

/* V：大起伏，与 M 波形错开 */
@keyframes about-hero-float-v {
  0% {
    transform: translate(0, -0.09em) rotate(0.45deg);
  }
  20% {
    transform: translate(-0.08em, 0.18em) rotate(-0.65deg);
  }
  42% {
    transform: translate(-0.15em, -0.15em) rotate(0.5deg);
  }
  62% {
    transform: translate(-0.1em, 0.14em) rotate(-0.55deg);
  }
  82% {
    transform: translate(-0.04em, -0.12em) rotate(0.3deg);
  }
  100% {
    transform: translate(0, -0.09em) rotate(0.45deg);
  }
}

/* —— 模块 2 —— */
.about-split {
  padding: var(--section-top) var(--section-inline) clamp(2.5rem, 6vh, 4rem);
  background: var(--white);
  border-top: 2px solid var(--pink);
}

.about-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items: start;
  width: min(1180px, calc(100% - 2 * var(--section-inline)));
  margin-inline: auto;
}

.about-split__title {
  margin: 0;
  font-size: clamp(1.65rem, 3.1vw, 2.65rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--black);
}

.about-split__body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-split__body p {
  margin: 0;
  font-size: clamp(0.95rem, 1.15vw, 1.05rem);
  line-height: 1.65;
  color: #222;
}

/* —— 模块 3 —— */
.about-team {
  padding: clamp(2.75rem, 6vh, 4.5rem) var(--section-inline);
  background: #f8f7f2;
}

.about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  width: min(1180px, calc(100% - 2 * var(--section-inline)));
  margin-inline: auto;
}

.about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(1.75rem, 4vh, 2.5rem);
}

.about-team__member {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 1rem 1.35rem;
  align-items: start;
}

.about-team__avatar {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.about-team__name {
  margin: 0 0 0.35rem;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
}

.about-team__role {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  line-height: 1.45;
  color: #444;
}

.about-team__more {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: underline;
  text-underline-offset: 4px;
  color: var(--black);
}

.about-team__more:hover {
  opacity: 0.6;
}

.about-team__roles-lead {
  margin: 0 0 1rem;
  font-size: clamp(0.75rem, 1.1vw, 0.85rem);
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--black);
}

.about-team__plus {
  margin-right: 0.35em;
  font-weight: 800;
}

.about-team__roles-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15em;
}

.about-team__roles-list li {
  font-size: clamp(2rem, 4.8vw, 3.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--black);
}

/* —— 模块 4 —— */
.about-showreel {
  padding: clamp(2.5rem, 6vh, 4rem) var(--section-inline) clamp(3rem, 8vh, 5rem);
  background: var(--white);
}

.about-showreel__inner {
  width: min(1180px, calc(100% - 2 * var(--section-inline)));
  margin-inline: auto;
}

.about-showreel__frame {
  position: relative;
  width: 100%;
  border-radius: 2px;
  overflow: hidden;
  background: #111;
  aspect-ratio: 16 / 9;
}

.about-showreel__video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.about-showreel__caption {
  margin: 0.85rem 0 0;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--black);
}

@media (max-width: 900px) {
  .about-split__grid,
  .about-team__grid {
    grid-template-columns: 1fr;
  }

  .about-team__roles {
    padding-top: 0.5rem;
  }
}

@media (max-width: 560px) {
  .about-team__member {
    grid-template-columns: 96px 1fr;
  }

  .about-team__avatar {
    width: 96px;
    height: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-hero__track {
    animation: none;
    transform: translateX(0);
  }

  .about-hero__letter,
  .about-hero__amp {
    animation: none !important;
  }
}