/* ===== 品牌中心 · 页面专属样式（作用域 .page-about） ===== */

.page-about {
  --about-hair: rgba(244, 237, 226, 0.14);
  --about-glow: rgba(43, 232, 208, 0.16);
  --about-soft: rgba(244, 237, 226, 0.76);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .section__title {
  color: var(--paper);
}

.page-about .section__lead {
  color: var(--about-soft);
}

.page-about .paper-panel {
  color: var(--text-ink);
}

.page-about .media__img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  left: -14%;
  width: 70%;
  height: 74%;
  background: radial-gradient(circle at 42% 42%, var(--about-glow), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 16%;
  right: -20%;
  width: 56%;
  height: 62%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 107, 44, 0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 44px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(32px, 6.6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__side {
  border-left: 1px solid var(--about-hair);
  padding-left: 20px;
}

.page-about .about-hero__side .annot {
  margin: 0 0 14px;
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-facts__k {
  color: var(--mute);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-facts__v {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  text-align: right;
}

.page-about .about-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 28px;
  padding: 14px 0;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-band__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .about-band__item + .about-band__item {
  padding-left: 28px;
}

.page-about .about-band__item + .about-band__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  border-radius: 50%;
  background: var(--orange);
}

/* ---------- 起点 ---------- */

.page-about .about-origin__panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-lg);
}

.page-about .about-origin__title {
  margin: 10px 0 0;
  color: var(--text-ink);
}

.page-about .about-origin__body {
  display: grid;
  gap: 16px;
  margin-top: 20px;
  max-width: 74ch;
}

.page-about .about-origin__body p {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: rgba(16, 22, 31, 0.82);
}

/* ---------- 发展历程 ---------- */

.page-about .about-tl-visual {
  margin: 0 0 clamp(28px, 4vw, 44px);
  border-radius: var(--r-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--about-hair);
}

.page-about .about-tl-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0) 40%, rgba(11, 18, 32, 0.72) 100%);
  pointer-events: none;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 40px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--gold) 55%, var(--orange) 100%);
  opacity: 0.62;
}

.page-about .about-node {
  position: relative;
  margin-bottom: 16px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 178, 75, 0.1);
}

.page-about .about-node__box {
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  padding: 16px 18px;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-node__box[open] {
  border-color: rgba(43, 232, 208, 0.4);
  background: rgba(22, 35, 58, 0.94);
}

.page-about .about-node__summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding-right: 28px;
}

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

.page-about .about-node__summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .about-node__box[open] .about-node__summary::after {
  content: "–";
}

.page-about .about-node__year {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--gold);
}

.page-about .about-node__label {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: rgba(43, 232, 208, 0.12);
  border: 1px solid rgba(43, 232, 208, 0.28);
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-node__title {
  flex-basis: 100%;
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-node__body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed rgba(244, 237, 226, 0.16);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 团队 ---------- */

.page-about .about-team__trunk {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 22px;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-team__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, rgba(43, 232, 208, 0.5), rgba(43, 232, 208, 0.06));
}

.page-about .about-role {
  position: relative;
  padding: 16px 4px;
  border-radius: var(--r-sm);
  transition: background 0.25s var(--ease);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 34px;
  width: 22px;
  height: 1px;
  background: rgba(43, 232, 208, 0.45);
}

.page-about .about-role:hover {
  background: rgba(43, 232, 208, 0.07);
}

.page-about .about-role__name {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 工作流 ---------- */

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-step {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-step__summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 32px 16px 0;
}

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

.page-about .about-step__idx {
  flex: none;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(255, 107, 44, 0.42);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-step__name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-step__summary::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), margin-top 0.25s var(--ease);
}

.page-about .about-step__box[open] .about-step__summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-about .about-step__body {
  margin: 0;
  padding: 0 12px 18px 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-flow__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--ink-2);
}

/* ---------- 场馆 ---------- */

.page-about .about-venue__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-venue__intro {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--about-soft);
}

.page-about .about-venue__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-venue__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-venue__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-about .about-venue__list a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-venue__media {
  margin: 0;
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

.page-about .about-venue__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, rgba(11, 18, 32, 0.05), rgba(11, 18, 32, 0.5));
  pointer-events: none;
}

/* ---------- 版本 ---------- */

.page-about .about-version__panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-lg);
}

.page-about .about-version__title {
  margin: 10px 0 0;
  color: var(--text-ink);
}

.page-about .about-version__lead {
  margin: 18px 0 26px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(16, 22, 31, 0.78);
}

.page-about .about-version__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-version__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 14px 18px;
  border-radius: var(--r-md);
  background: rgba(220, 207, 188, 0.5);
  border-left: 3px solid var(--teal);
}

.page-about .about-version__ver {
  min-width: 46px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--teal);
}

.page-about .about-version__note {
  flex: 1 1 220px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-ink);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-eco__item {
  position: relative;
  padding: 28px 22px 24px;
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, var(--ink-2), var(--ink-3));
  border: 1px solid var(--about-hair);
  overflow: hidden;
}

.page-about .about-eco__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-about .about-eco__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-eco__name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--paper);
}

.page-about .about-eco__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 为什么选我们 ---------- */

.page-about .about-reason__grid {
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-reason__item {
  background: var(--ink);
  padding: clamp(22px, 3vw, 34px);
}

.page-about .about-reason__name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--cyan);
}

.page-about .about-reason__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(24px, 3.5vw, 38px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(43, 232, 208, 0.24);
  background: linear-gradient(120deg, rgba(255, 107, 44, 0.16), rgba(43, 232, 208, 0.12));
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏修正 ---------- */

@media (max-width: 640px) {
  .page-about .about-band {
    gap: 8px 18px;
  }

  .page-about .about-band__item {
    white-space: normal;
  }

  .page-about .about-band__item + .about-band__item {
    padding-left: 0;
  }

  .page-about .about-band__item + .about-band__item::before {
    display: none;
  }

  .page-about .about-hero__side {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--about-hair);
    padding-top: 20px;
  }

  .page-about .about-timeline {
    padding-left: 30px;
  }

  .page-about .about-node::before {
    left: -30px;
    width: 12px;
    height: 12px;
  }

  .page-about .about-timeline::before {
    left: 5px;
  }
}

/* ---------- 中屏 ---------- */

@media (min-width: 780px) {
  .page-about .about-team__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px 34px;
  }

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

  .page-about .about-reason__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .about-node {
    width: calc(50% - 36px);
    margin-bottom: 22px;
  }

  .page-about .about-node::before {
    top: 22px;
  }

  .page-about .about-node:nth-child(odd)::before {
    left: auto;
    right: -43px;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: calc(50% + 36px);
  }

  .page-about .about-node:nth-child(even)::before {
    left: -43px;
    right: auto;
  }

  .page-about .about-venue__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 56px;
  }
}

@media (min-width: 960px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__box,
  .page-about .about-role,
  .page-about .about-step__summary::after {
    transition: none;
  }
}