/* ============ 品牌中心 · 页面专属样式 ============ */
.page-about {
  --about-gold-line: rgba(212, 175, 55, 0.24);
  --about-blue-line: rgba(229, 231, 235, 0.08);
  --about-violet-soft: rgba(168, 85, 247, 0.16);
  position: relative;
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
  background-image:
    linear-gradient(var(--about-blue-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-blue-line) 1px, transparent 1px);
  background-size: 104px 104px;
  background-position: center top;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(0.75rem, 2vw, 1.5rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding-top: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-hero__rail-num {
  color: var(--gold);
}

.page-about .about-hero__body {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 0.65rem 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.6rem, 11.5vw, 6.4rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--mist);
  background: linear-gradient(102deg, #E5E7EB 0%, #D4AF37 44%, #A855F7 76%, #E5E7EB 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lede {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  max-width: 46ch;
  color: var(--mist);
}

.page-about .about-hero__note {
  margin-top: 1rem;
  max-width: 52ch;
  color: var(--silver);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 1.25rem 1.5rem;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding-top: clamp(1.25rem, 3vw, 1.85rem);
  border-top: 1px solid var(--about-gold-line);
}

.page-about .about-hero__stat dt {
  margin-bottom: 0.45rem;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--silver);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.15;
  color: var(--mist);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  color: var(--gold);
}

/* ---------- 品牌起源 ---------- */
.page-about .about-origin {
  margin-top: clamp(3rem, 9vw, 6.5rem);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 3.5rem);
}

.page-about .about-origin__media {
  position: relative;
  margin: 0;
}

.page-about .about-origin__media::after {
  content: "";
  position: absolute;
  top: -12px;
  right: -12px;
  width: 44%;
  height: 38%;
  border-top: 1px solid var(--about-gold-line);
  border-right: 1px solid var(--about-gold-line);
  pointer-events: none;
}

.page-about .about-origin__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-origin__text {
  min-width: 0;
}

.page-about .about-origin__text h2 {
  margin: 0.6rem 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.75rem, 4.4vw, 3rem);
  line-height: 1.18;
  color: var(--mist);
}

.page-about .about-origin__text p {
  color: var(--silver);
  line-height: 1.9;
  margin-bottom: 1rem;
}

.page-about .about-origin__text p:first-of-type {
  color: var(--mist);
}

/* ---------- 纯简入口理念 ---------- */
.page-about .about-idea {
  position: relative;
  margin-top: clamp(3.5rem, 10vw, 7rem);
  padding: clamp(3.25rem, 8vw, 5.5rem) 0;
  background:
    radial-gradient(130% 90% at 8% 0%, rgba(168, 85, 247, 0.18), transparent 62%),
    linear-gradient(160deg, rgba(26, 11, 46, 0.92) 0%, rgba(11, 31, 26, 0.78) 100%);
  border-top: 1px solid var(--about-gold-line);
  border-bottom: 1px solid var(--about-gold-line);
  clip-path: polygon(0 2%, 100% 0, 100% 98%, 0 100%);
}

.page-about .about-idea__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .about-idea__head h2 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.15;
  color: var(--mist);
}

.page-about .about-idea__lede {
  color: var(--silver);
  line-height: 1.9;
  max-width: 46ch;
}

.page-about .about-idea__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-idea__item {
  position: relative;
  padding: 1.35rem 1.35rem 1.25rem;
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-idea__item:hover {
  border-color: var(--hairline-cyan);
  transform: translateY(-2px);
}

.page-about .about-idea__idx {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--cyan);
}

.page-about .about-idea__item h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.2rem;
  color: var(--mist);
}

.page-about .about-idea__item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 版本演进时间线 ---------- */
.page-about .about-tl {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-about .about-tl__head {
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-tl__head h2 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.15;
  color: var(--mist);
}

.page-about .about-tl__intro {
  color: var(--silver);
  line-height: 1.9;
}

.page-about .about-tl__backdrop {
  position: relative;
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  aspect-ratio: 2 / 1;
  overflow: hidden;
}

.page-about .about-tl__backdrop img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.78;
}

.page-about .about-tl__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin-left: 0.35rem;
  padding-left: clamp(0.9rem, 3vw, 1.75rem);
  border-left: 1px solid var(--about-gold-line);
}

.page-about .about-tl__node {
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--violet);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-tl__node[open] {
  border-left-color: var(--gold);
  background: var(--glass-strong);
}

.page-about .about-tl__node--current {
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.16), 0 18px 42px -28px rgba(168, 85, 247, 0.7);
}

.page-about .about-tl__node summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
}

.page-about .about-tl__node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__node summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-tl__ver {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-tl__label {
  font-size: 0.98rem;
  color: var(--mist);
}

.page-about .about-tl__mark {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}

.page-about .about-tl__mark::before,
.page-about .about-tl__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-about .about-tl__mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-about .about-tl__node[open] .about-tl__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0.35;
}

.page-about .about-tl__panel {
  padding: 0 1.1rem 1.15rem 1.1rem;
}

.page-about .about-tl__panel p {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--silver);
}

.page-about .about-tl__panel p:last-child {
  margin-bottom: 0;
}

.page-about .about-tl__link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline-cyan);
  padding-bottom: 1px;
}

.page-about .about-tl__link a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-tl__next {
  margin-top: clamp(1.25rem, 3vw, 1.85rem);
  font-size: 0.9rem;
  color: var(--silver);
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: clamp(3rem, 9vw, 6rem);
}

.page-about .about-team__head {
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-team__head h2 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.15;
  color: var(--mist);
}

.page-about .about-team__intro {
  color: var(--silver);
  line-height: 1.9;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-team__card {
  position: relative;
  padding: 1.4rem 1.35rem 1.3rem;
  background: linear-gradient(175deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.025));
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.35rem;
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--gold));
}

.page-about .about-team__card:hover {
  transform: translateY(-3px);
  border-color: var(--hairline-gold);
}

.page-about .about-team__idx {
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--silver);
}

.page-about .about-team__card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.15rem;
  color: var(--mist);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-team__tail {
  margin-top: clamp(1.35rem, 3vw, 2rem);
  padding-left: 1rem;
  border-left: 2px solid var(--amber);
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 荣誉与合作 ---------- */
.page-about .about-honor {
  margin-top: clamp(3rem, 9vw, 6rem);
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
  background: linear-gradient(180deg, rgba(17, 18, 20, 0.92), rgba(17, 18, 20, 0.55));
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3rem);
  align-items: center;
}

.page-about .about-honor__media {
  margin: 0;
}

.page-about .about-honor__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-honor__body {
  min-width: 0;
}

.page-about .about-honor__body h2 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.15;
  color: var(--mist);
}

.page-about .about-honor__body > p {
  color: var(--silver);
  line-height: 1.9;
}

.page-about .about-honor__list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
}

.page-about .about-honor__list li {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: 0.5rem 1.25rem;
  align-items: baseline;
  padding: 0.8rem 0;
  border-bottom: 1px dashed var(--about-gold-line);
}

.page-about .about-honor__key {
  position: relative;
  padding-left: 0.9rem;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--mist);
}

.page-about .about-honor__key::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 5px;
  height: 5px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-honor__val {
  font-size: 0.88rem;
  color: var(--silver);
  line-height: 1.7;
}

.page-about .about-honor__note {
  margin-top: 1.25rem;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(2.75rem, 8vw, 5rem);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: center;
  padding: clamp(1.6rem, 4vw, 2.4rem);
  border: 1px solid var(--about-gold-line);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 130% at 100% 0%, var(--about-violet-soft), transparent 60%),
    var(--glass);
  backdrop-filter: blur(12px);
}

.page-about .about-next__text h2 {
  margin: 0.55rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1.2;
  color: var(--mist);
}

.page-about .about-next__text p {
  margin: 0;
  color: var(--silver);
  line-height: 1.85;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-idea__list,
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-tl__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    border-left: none;
    margin-left: 0;
    padding-left: 0;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .page-about .about-next__links {
    justify-content: flex-end;
  }
}

@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(2.5rem, 6vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-origin__media {
    margin-top: clamp(2rem, 6vw, 4.5rem);
  }

  .page-about .about-hero {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: clamp(2rem, 6vw, 4.5rem);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding: 0.4rem 0 0 0.9rem;
    border-left: 1px solid var(--about-gold-line);
  }

  .page-about .about-hero__rail-word {
    writing-mode: vertical-rl;
    letter-spacing: 0.42em;
  }

  .page-about .about-idea__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(2.5rem, 7vw, 5rem);
    align-items: start;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(2.5rem, 6vw, 4.5rem);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-tl__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-idea__item,
  .page-about .about-team__card,
  .page-about .about-tl__mark::before,
  .page-about .about-tl__mark::after {
    transition: none;
  }
}
</main>