/* ========================================
   品牌档案页 · 杂志式排版 · 专属样式
   ======================================== */
.page-about {
  --about-bg: #0a0b14;
  --about-surface: #1c1030;
  --about-surface-2: #151027;
  --about-purple: #9b59b6;
  --about-blue: #3498db;
  --about-pink: #ff6ec7;
  --about-ink: #f5f0e8;
  --about-muted: #7f8fa6;
  --about-content-max: 1240px;
  --about-gutter: 20px;
  background:
    radial-gradient(circle at 85% 8%, rgba(155, 89, 182, 0.16), transparent 34%),
    radial-gradient(circle at 12% 42%, rgba(52, 152, 219, 0.12), transparent 28%),
    var(--about-bg);
  color: var(--about-ink);
  overflow-x: hidden;
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 28px var(--about-gutter) 0;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--about-muted);
}
.page-about .breadcrumb a {
  color: var(--about-blue);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--about-pink);
}
.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--about-muted);
  opacity: 0.6;
}

/* --- 首屏 Hero --- */
.page-about .about-hero {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 56px var(--about-gutter) 72px;
  position: relative;
}

.page-about .section-kicker {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-pink);
  border: 1px solid rgba(255, 110, 199, 0.35);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 20px;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 7vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  max-width: 11em;
  background: linear-gradient(115deg, var(--about-ink) 0%, var(--about-ink) 58%, var(--about-pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__sub {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--about-muted);
  margin: 0 0 24px;
  border-bottom: 1px solid rgba(127, 143, 166, 0.2);
  padding-bottom: 16px;
  max-width: 30em;
}

.page-about .about-hero__lead {
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.2vw, 24px);
  line-height: 1.6;
  color: var(--about-muted);
  max-width: 30em;
  margin-bottom: 36px;
}

.page-about .about-hero__quote {
  position: relative;
  margin: 0 0 40px;
  padding: 24px 0 0 20px;
  border-left: 3px solid var(--about-pink);
  max-width: 34em;
}
.page-about .about-hero__quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.8vw, 20px);
  line-height: 1.8;
  color: var(--about-ink);
}
.page-about .about-hero__quote-mark {
  display: block;
  font-family: var(--font-serif);
  font-size: 64px;
  line-height: 0.5;
  color: var(--about-purple);
  margin-bottom: 14px;
}

.page-about .about-hero__index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-hero__index a {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--about-ink);
  background: var(--about-surface);
  border: 1px solid rgba(155, 89, 182, 0.3);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.page-about .about-hero__index a:hover {
  background: var(--about-purple);
  border-color: var(--about-purple);
  color: var(--about-ink);
}

/* --- 品牌起源 --- */
.page-about .about-origin {
  border-top: 1px solid rgba(155, 89, 182, 0.25);
  border-bottom: 1px solid rgba(52, 152, 219, 0.2);
  background: linear-gradient(135deg, rgba(28, 16, 48, 0.55) 0%, rgba(10, 11, 20, 0.2) 100%);
  padding: 64px 0;
}
.page-about .about-origin__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
  display: grid;
  gap: 40px;
  align-items: start;
}
.page-about .about-origin__content p {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 240, 232, 0.88);
  margin: 0 0 16px;
}
.page-about .about-origin__sign {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--about-pink);
  margin-top: 24px;
}
.page-about .about-origin__figure {
  margin: 0;
  position: relative;
}
.page-about .about-origin__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  clip-path: polygon(2% 0, 100% 0, 98% 100%, 0 96%);
}
.page-about .about-origin__figure figcaption {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--about-muted);
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid var(--about-blue);
}

/* --- 翻分类逻辑 --- */
.page-about .about-taxonomy {
  padding: 72px 0 56px;
}
.page-about .about-taxonomy__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
}
.page-about .about-taxonomy h2,
.page-about .about-scale h2,
.page-about .about-timeline h2,
.page-about .about-tech h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.15;
  margin: 0 0 12px;
}
.page-about .about-taxonomy__lead,
.page-about .about-scale__lead,
.page-about .about-timeline__head p,
.page-about .about-tech__lead {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-muted);
  max-width: 42em;
  margin-bottom: 36px;
}
.page-about .about-timeline__head p {
  margin-bottom: 0;
}
.page-about .about-taxonomy__tabs {
  margin-bottom: 40px;
}
.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid rgba(155, 89, 182, 0.25);
  padding-bottom: 12px;
  margin-bottom: 24px;
}
.page-about .tabs__trigger {
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--about-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 8px 18px;
  cursor: pointer;
  transition: all 0.2s;
}
.page-about .tabs__trigger[aria-selected="true"] {
  color: var(--about-ink);
  background: var(--about-purple);
  border-color: var(--about-purple);
}
.page-about .tab-panel {
  background: var(--about-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border-left: 3px solid var(--about-blue);
  animation: about-tab-fade 0.3s ease;
}
.page-about .tab-panel[hidden] {
  display: none;
}
.page-about .tab-panel p {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(245, 240, 232, 0.85);
}
.page-about .tab-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
.page-about .tab-panel li {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--about-muted);
  padding-left: 16px;
  position: relative;
}
.page-about .tab-panel li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--about-pink);
  transform: rotate(45deg);
}
.page-about .about-taxonomy__figure {
  margin: 0;
}
.page-about .about-taxonomy__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}
.page-about .about-taxonomy__figure figcaption {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--about-muted);
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid var(--about-pink);
}

@keyframes about-tab-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- 内容规模 --- */
.page-about .about-scale {
  position: relative;
  background:
    linear-gradient(135deg, rgba(155, 89, 182, 0.14), transparent 42%),
    linear-gradient(315deg, rgba(52, 152, 219, 0.12), transparent 48%),
    var(--about-surface);
  padding: 88px 0 80px;
  clip-path: polygon(0 2%, 100% 0, 100% 98%, 0 100%);
}
.page-about .about-scale__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
}
.page-about .about-scale__lead {
  margin-bottom: 36px;
}
.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 48px;
}
.page-about .about-scale__stat {
  background: rgba(10, 11, 20, 0.55);
  border: 1px solid rgba(155, 89, 182, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 12px;
  text-align: center;
}
.page-about .about-scale__stat dt {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--about-muted);
  margin-bottom: 8px;
}
.page-about .about-scale__stat dd {
  margin: 0;
}
.page-about .about-scale__number {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: var(--about-ink);
}
.page-about .about-scale__unit {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--about-pink);
  margin-left: 2px;
}
.page-about .about-scale__distribution h3 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  color: var(--about-ink);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.page-about .about-scale__bars {
  display: grid;
  gap: 10px;
  margin: 0;
}
.page-about .about-scale__bar-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  align-items: center;
  gap: 12px;
}
.page-about .about-scale__bar-row dt {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--about-muted);
}
.page-about .about-scale__bar-row dd {
  margin: 0;
}
.page-about .about-scale__bar {
  position: relative;
  display: block;
  width: var(--bar-width, 50%);
  height: 18px;
  line-height: 18px;
  background: linear-gradient(90deg, var(--about-purple), var(--about-blue));
  border-radius: 999px;
  color: var(--about-ink);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  text-align: right;
  padding-right: 8px;
  min-width: 48px;
}

/* --- 发展里程碑 --- */
.page-about .about-timeline {
  padding: 72px 0 72px;
}
.page-about .about-timeline__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
}
.page-about .about-timeline__head {
  display: grid;
  gap: 32px;
  align-items: end;
  margin-bottom: 48px;
}
.page-about .about-timeline__figure {
  margin: 0;
  max-width: 400px;
}
.page-about .about-timeline__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  filter: saturate(0.85) contrast(1.08);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid rgba(155, 89, 182, 0.35);
  margin-left: 12px;
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 24px 24px;
}
.page-about .about-timeline__item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--about-bg);
  border: 3px solid var(--about-blue);
  border-radius: 50%;
}
.page-about .about-timeline__item details {
  font-family: var(--font-sans);
}
.page-about .about-timeline__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  padding: 8px 0;
}
.page-about .about-timeline__item summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-pink);
  background: rgba(255, 110, 199, 0.12);
  border: 1px solid rgba(255, 110, 199, 0.3);
  border-radius: 4px;
  padding: 4px 8px;
}
.page-about .about-timeline__item summary::after {
  content: '+';
  margin-left: auto;
  font-family: var(--font-sans);
  font-size: 20px;
  color: var(--about-muted);
  width: 28px;
  height: 28px;
  line-height: 26px;
  text-align: center;
  border: 1px solid rgba(127, 143, 166, 0.3);
  border-radius: 50%;
  transition: color 0.2s, border-color 0.2s;
}
.page-about .about-timeline__item details[open] summary::after {
  content: '−';
  color: var(--about-pink);
  border-color: var(--about-pink);
}
.page-about .about-timeline__item details p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  max-width: 42em;
}

/* --- 技术架构 --- */
.page-about .about-tech {
  background: var(--about-surface);
  border-top: 1px solid rgba(52, 152, 219, 0.25);
  padding: 72px 0 72px;
  position: relative;
}
.page-about .about-tech::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--about-purple), var(--about-blue), var(--about-pink));
}
.page-about .about-tech__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
}
.page-about .about-tech__lead {
  margin-bottom: 40px;
}
.page-about .about-tech__grid {
  display: grid;
  gap: 16px;
}
.page-about .about-tech__card {
  background: rgba(10, 11, 20, 0.6);
  border: 1px solid rgba(127, 143, 166, 0.16);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.page-about .about-tech__card:hover {
  border-color: rgba(255, 110, 199, 0.4);
  transform: translateY(-2px);
}
.page-about .about-tech__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--about-blue);
  border-radius: 4px 0 0 4px;
}
.page-about .about-tech__card:nth-child(even)::before {
  background: var(--about-pink);
}
.page-about .about-tech__card h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--about-ink);
}
.page-about .about-tech__card p {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

/* --- 内部导航 --- */
.page-about .about-internal-nav {
  padding: 56px 0 80px;
}
.page-about .about-internal-nav__inner {
  max-width: var(--about-content-max);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
  text-align: center;
}
.page-about .about-internal-nav h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 8px;
}
.page-about .about-internal-nav p {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--about-muted);
  margin-bottom: 24px;
}
.page-about .about-internal-nav__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* --- 响应式：平板及以上 --- */
@media (min-width: 640px) {
  .page-about .about-scale__stats {
    gap: 20px;
  }
  .page-about .about-tech__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- 响应式：桌面 --- */
@media (min-width: 900px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: 1fr 260px;
    grid-template-areas:
      "kicker kicker"
      "title index"
      "sub index"
      "lead index"
      "quote index";
    column-gap: 48px;
    padding-top: 64px;
    padding-bottom: 96px;
  }
  .page-about .about-hero .section-kicker {
    grid-area: kicker;
  }
  .page-about .about-hero h1 {
    grid-area: title;
  }
  .page-about .about-hero__sub {
    grid-area: sub;
  }
  .page-about .about-hero__lead {
    grid-area: lead;
  }
  .page-about .about-hero__quote {
    grid-area: quote;
    margin-right: 24px;
    margin-bottom: 0;
  }
  .page-about .about-hero__index {
    grid-area: index;
    flex-direction: column;
    align-self: start;
    border-left: 1px solid rgba(155, 89, 182, 0.3);
    padding-left: 20px;
    margin-top: 8px;
  }
  .page-about .about-hero__index a {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 8px 0;
    font-weight: 600;
    color: var(--about-muted);
    display: flex;
    justify-content: space-between;
    width: 100%;
  }
  .page-about .about-hero__index a:hover {
    color: var(--about-pink);
    background: transparent;
  }

  .page-about .about-origin__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .about-scale__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 48px;
  }
  .page-about .about-scale__lead {
    grid-column: 1 / -1;
  }
  .page-about .about-scale__stats {
    grid-column: 1;
    grid-row: span 1;
    align-self: start;
    margin-bottom: 0;
  }
  .page-about .about-scale__distribution {
    grid-column: 2;
    align-self: start;
  }

  .page-about .about-timeline__head {
    grid-template-columns: 1fr 320px;
    gap: 48px;
  }
  .page-about .about-timeline__list {
    margin-left: 32px;
  }
}

.page-about {
  --bar-width: 1rem;
}