.page-about {
  --about-gold-soft: rgba(232, 184, 75, 0.14);
  --about-gold-line: linear-gradient(90deg, transparent, rgba(232, 184, 75, 0.55), transparent);
  --about-blue-card: linear-gradient(165deg, rgba(15, 29, 61, 0.85), rgba(15, 29, 61, 0.35));
  --about-crimson-glow: 0 0 50px rgba(216, 56, 50, 0.18);

  background-color: var(--phx-bg);
  color: var(--phx-white);
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  padding-top: 18px;
  font-size: 0.85rem;
}
.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .breadcrumb li + li {
  margin-left: 10px;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--phx-steel);
}
.page-about .breadcrumb a {
  color: var(--phx-gray);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--phx-gold);
}

/* ===== 首屏：2017 视觉锚点 ===== */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 52px;
  background:
    radial-gradient(120% 90% at 85% 10%, rgba(216, 56, 50, 0.18) 0%, transparent 55%),
    radial-gradient(90% 70% at 15% 85%, rgba(232, 184, 75, 0.1) 0%, transparent 50%),
    var(--phx-bg);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(232, 184, 75, 0.7) 30%, transparent 70%);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 320px;
  height: 240px;
  background: linear-gradient(135deg, rgba(216, 56, 50, 0.25), transparent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  display: none;
}
.page-about .about-hero__container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  align-items: start;
}
.page-about .about-hero__year-group {
  margin: 0;
}
.page-about .about-hero__year {
  display: block;
  font-family: var(--phx-font-body);
  font-weight: 900;
  font-size: clamp(5.5rem, 24vw, 12rem);
  line-height: 0.85;
  letter-spacing: -0.06em;
  background: linear-gradient(175deg, #F5D68A 0%, #E8B84B 45%, #D83832 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 10px 30px rgba(232, 184, 75, 0.25));
}
.page-about .about-hero__year-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 6px 14px;
  border: 1px solid rgba(232, 184, 75, 0.35);
  border-radius: var(--phx-radius-pill);
  color: var(--phx-gold-soft);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}
.page-about .about-hero__kicker {
  margin: 0 0 8px;
  color: var(--phx-gold);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  line-height: 1.05;
}
.page-about .about-hero__lead {
  color: var(--phx-gray);
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  margin: 0 0 24px;
}
.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-hero__tags .tag-pill {
  border: 1px solid rgba(232, 184, 75, 0.26);
  background: rgba(232, 184, 75, 0.08);
  color: var(--phx-gold-soft);
}

/* ===== 通用眉题与区块头 ===== */
.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--phx-gold);
}
.page-about .about-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--phx-gold);
}
.page-about .about-section-head {
  max-width: 640px;
  margin-bottom: 24px;
}
.page-about .about-section-head .lead-text {
  color: var(--phx-gray);
  margin-top: 8px;
}

/* ===== 品牌关系：凤凰体育娱乐 · 凤凰竞界 ===== */
.page-about .about-identity__grid {
  display: grid;
  gap: 28px;
  align-items: start;
}
.page-about .about-identity__figure {
  margin: 0;
}
.page-about .about-identity__frame {
  aspect-ratio: 2 / 3;
  border-radius: var(--phx-radius-lg);
  border: 1px solid rgba(232, 184, 75, 0.28);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.38);
  overflow: hidden;
}
.page-about .about-identity__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .about-identity__content {
  position: relative;
  background: var(--about-blue-card);
  border: 1px solid rgba(232, 184, 75, 0.12);
  border-radius: var(--phx-radius-lg);
  padding: 28px 24px 32px;
  overflow: hidden;
}
.page-about .about-identity__content::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 40%, rgba(232, 184, 75, 0.06) 55%, transparent 70%);
  pointer-events: none;
}
.page-about .about-identity__content p {
  color: var(--phx-gray);
  line-height: 1.8;
  margin: 0 0 14px;
}
.page-about .about-identity__content p:last-of-type {
  margin-bottom: 0;
}
.page-about .about-identity__contact {
  list-style: none;
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(232, 184, 75, 0.2);
  display: grid;
  gap: 10px;
}
.page-about .about-identity__contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--phx-gray);
}
.page-about .about-identity__contact-label {
  min-width: 7em;
  color: var(--phx-gold-soft);
  font-weight: 600;
}
.page-about .about-identity__contact .mono-num {
  color: var(--phx-white);
}
.page-about .about-identity__note {
  font-size: 0.8rem;
  color: var(--phx-steel);
  margin-top: 12px;
  line-height: 1.6;
}

/* ===== 发展里程碑：垂直时间轴 ===== */
.page-about .about-timeline {
  background:
    radial-gradient(70% 50% at 100% 0%, rgba(15, 29, 61, 0.65) 0%, transparent 70%),
    var(--phx-bg);
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  position: relative;
  --tl-x: 16px;
}
.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: var(--tl-x);
  top: 4px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--phx-gold) 0%, rgba(232, 184, 75, 0.2) 50%, var(--phx-crimson) 100%);
  transform: translateX(-50%);
}
.page-about .about-timeline__entry {
  position: relative;
  padding: 0 0 36px 48px;
}
.page-about .about-timeline__entry::before {
  content: "";
  position: absolute;
  left: var(--tl-x);
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--phx-gold);
  border: 3px solid var(--phx-bg);
  box-shadow: 0 0 0 2px rgba(232, 184, 75, 0.3);
  transform: translateX(-50%);
}
.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--phx-font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--phx-gold);
  background: rgba(232, 184, 75, 0.1);
  border: 1px solid rgba(232, 184, 75, 0.2);
  border-radius: var(--phx-radius-pill);
  padding: 6px 14px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.page-about .about-timeline__card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(232, 184, 75, 0.14);
  border-radius: var(--phx-radius-md);
  padding: 18px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-timeline__card:hover {
  border-color: rgba(232, 184, 75, 0.45);
  box-shadow: 0 0 24px rgba(232, 184, 75, 0.08);
}
.page-about .about-timeline__card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--phx-white);
}
.page-about .about-timeline__card p {
  color: var(--phx-gray);
  line-height: 1.7;
  font-size: 0.92rem;
  margin: 0;
}
.page-about .about-timeline__details {
  margin-top: 12px;
  border-top: 1px dashed rgba(154, 164, 178, 0.25);
  padding-top: 10px;
  font-size: 0.9rem;
}
.page-about .about-timeline__details summary {
  cursor: pointer;
  list-style: none;
  color: var(--phx-gold-soft);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.page-about .about-timeline__details summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__details summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid currentColor;
  font-family: var(--phx-font-mono);
  font-size: 0.9rem;
  transition: transform 0.2s ease;
}
.page-about .about-timeline__details[open] summary::after {
  content: "–";
}
.page-about .about-timeline__details p {
  margin-top: 8px;
  line-height: 1.65;
}
.page-about .about-timeline__details summary:focus-visible {
  outline: 2px solid var(--phx-gold);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ===== 技术底座：疾速直连 ===== */
.page-about .about-tech {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 29, 61, 0.32) 30%, rgba(15, 29, 61, 0.32) 70%, transparent 100%);
  border-top: 1px solid rgba(232, 184, 75, 0.08);
  border-bottom: 1px solid rgba(232, 184, 75, 0.08);
}
.page-about .about-tech__band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.page-about .about-tech__stat {
  background: linear-gradient(160deg, rgba(15, 29, 61, 0.9), rgba(15, 29, 61, 0.35));
  border: 1px solid rgba(232, 184, 75, 0.16);
  border-radius: var(--phx-radius-md);
  padding: 20px 16px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-tech__stat:hover {
  border-color: rgba(232, 184, 75, 0.5);
  box-shadow: 0 8px 30px rgba(232, 184, 75, 0.12);
  transform: translateY(-3px);
}
.page-about .about-tech__value {
  display: block;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--phx-gold);
  line-height: 1;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}
.page-about .about-tech__label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--phx-white);
  margin-bottom: 6px;
  line-height: 1.4;
}
.page-about .about-tech__note {
  display: block;
  color: var(--phx-gray);
  font-size: 0.8rem;
  line-height: 1.5;
}
.page-about .about-tech__figure {
  margin: 24px 0 0;
}
.page-about .about-tech__frame {
  aspect-ratio: 8 / 5;
  border-radius: var(--phx-radius-lg);
  border: 1px solid rgba(232, 184, 75, 0.2);
  overflow: hidden;
  box-shadow: var(--phx-shadow);
}
.page-about .about-tech__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== 「小屏优先」设计理念 ===== */
.page-about .about-mobile {
  background:
    linear-gradient(180deg, rgba(15, 29, 61, 0.5), rgba(15, 29, 61, 0.2)),
    var(--phx-bg);
}
.page-about .about-mobile__grid {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}
.page-about .about-mobile__principle {
  background: rgba(15, 29, 61, 0.38);
  border-left: 3px solid var(--phx-gold);
  border-radius: calc(var(--phx-radius-sm) + 2px);
  padding: 22px;
  transition: background 0.2s ease, transform 0.2s ease;
}
.page-about .about-mobile__principle:hover {
  background: rgba(15, 29, 61, 0.65);
  transform: translateX(2px);
}
.page-about .about-mobile__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(232, 184, 75, 0.12);
  border: 1px solid rgba(232, 184, 75, 0.3);
  color: var(--phx-gold);
  font-weight: 700;
  margin-bottom: 14px;
}
.page-about .about-mobile__principle h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 10px;
}
.page-about .about-mobile__principle p {
  color: var(--phx-gray);
  line-height: 1.7;
  margin: 0;
}

/* ===== 云南在地根脉 ===== */
.page-about .about-yunnan {
  position: relative;
  overflow: hidden;
}
.page-about .about-yunnan__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .about-yunnan__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  display: block;
}
.page-about .about-yunnan__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(10, 10, 15, 0.92) 0%, rgba(10, 10, 15, 0.5) 55%, rgba(10, 10, 15, 0.82) 100%);
}
.page-about .about-yunnan__content {
  position: relative;
  z-index: 1;
  max-width: 620px;
  background: rgba(15, 29, 61, 0.42);
  border: 1px solid rgba(232, 184, 75, 0.22);
  border-radius: var(--phx-radius-lg);
  padding: 30px 28px;
  box-shadow: var(--phx-shadow);
  backdrop-filter: blur(6px);
}
.page-about .about-yunnan__content p {
  color: var(--phx-gray);
  line-height: 1.75;
  margin: 0 0 14px;
}
.page-about .about-yunnan__content p:last-of-type {
  margin-bottom: 0;
}
.page-about .about-yunnan__content .btn {
  margin-top: 18px;
}

/* ===== 继续了解：入口导航 ===== */
.page-about .about-next {
  border-top: 1px solid rgba(232, 184, 75, 0.2);
}
.page-about .about-next__head {
  margin-bottom: 24px;
}
.page-about .about-next__grid {
  display: grid;
  gap: 16px;
}
.page-about .about-next__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "index title"
    "index desc";
  gap: 4px 18px;
  align-items: center;
  background: linear-gradient(150deg, rgba(15, 29, 61, 0.8), rgba(15, 29, 61, 0.2));
  border: 1px solid rgba(154, 164, 178, 0.18);
  border-radius: var(--phx-radius-md);
  padding: 24px;
  color: var(--phx-white);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: rgba(232, 184, 75, 0.6);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  transform: translateY(-3px);
}
.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--phx-gold);
  outline-offset: 4px;
}
.page-about .about-next__index {
  grid-area: index;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--phx-gold);
  font-variant-numeric: tabular-nums;
}
.page-about .about-next__title {
  grid-area: title;
  font-weight: 700;
  font-size: 1rem;
}
.page-about .about-next__desc {
  grid-area: desc;
  color: var(--phx-gray);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 880px) {
  .page-about .about-hero {
    padding: 64px 0 72px;
  }
  .page-about .about-hero::after {
    display: block;
  }
  .page-about .about-hero__container {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 64px;
    align-items: center;
  }

  .page-about .about-identity__grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
  }
  .page-about .about-identity__content {
    padding: 40px 44px 44px;
  }

  .page-about .about-timeline__list {
    --tl-x: 50%;
  }
  .page-about .about-timeline__list::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .about-timeline__entry {
    width: 50%;
    padding: 0 68px 44px 0;
  }
  .page-about .about-timeline__entry:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 44px 68px;
  }
  .page-about .about-timeline__entry::before {
    left: auto;
    right: -6px;
    transform: none;
  }
  .page-about .about-timeline__entry:nth-child(even)::before {
    left: -6px;
    right: auto;
  }
  .page-about .about-timeline__card {
    padding: 24px 28px;
  }

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

  .page-about .about-mobile__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-yunnan__content {
    padding: 40px 44px;
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-tech__band {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* ===== 减弱动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}