/* ==========================================================
   page-about — 品牌档案
   所有选择器限定在 .page-about 作用域内
   ========================================================== */

.page-about {
  --about-line: 1px solid var(--beige);
  background: var(--warm-white);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------------- 首屏 ---------------- */

.page-about .about-hero {
  position: relative;
  padding: 22px 0 40px;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -8% -18% 34%;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(231, 226, 216, 0.72) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(231, 226, 216, 0.72) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 92% at 16% 0%, #000 0%, rgba(0, 0, 0, 0.35) 54%, transparent 78%);
          mask-image: radial-gradient(120% 92% at 16% 0%, #000 0%, rgba(0, 0, 0, 0.35) 54%, transparent 78%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 18px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.35rem, 8.8vw, 5.4rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 10px 0 20px;
}

.page-about .about-hero__accent {
  position: relative;
  z-index: 0;
  white-space: nowrap;
  color: var(--purple);
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: -0.02em;
  right: -0.02em;
  bottom: 0.05em;
  height: 0.18em;
  background: var(--amber);
  opacity: 0.38;
  border-radius: 999px;
  z-index: -1;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--beige);
  border: var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-about .about-fact {
  background: var(--warm-white);
  padding: 16px 18px 18px;
}

.page-about .about-fact dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .about-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--amber-deep);
}

/* ---------------- 章节索引条 ---------------- */

.page-about .about-index {
  position: sticky;
  top: 72px;
  z-index: 12;
  background: rgba(251, 248, 242, 0.93);
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
  border-top: var(--about-line);
  border-bottom: var(--about-line);
}

.page-about .about-index__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 11px 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-about .about-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--beige);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--purple-soft);
  border-color: var(--purple);
  color: var(--purple-deep);
}

/* ---------------- 通用区块标题 ---------------- */

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 4.4vw, 2.25rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--purple-deep);
  margin: 6px 0 12px;
}

.page-about .section-note {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--gray);
}

.page-about .about-team__head,
.page-about .about-versions .section-head {
  margin-bottom: 30px;
}

/* ---------------- 通用图示框 ---------------- */

.page-about .about-figure {
  margin: 0;
  padding: 10px;
  background: #ffffff;
  border: var(--about-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  background: var(--purple-soft);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  padding: 0 4px 4px;
  color: var(--gray);
}

/* ---------------- 起点 ---------------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: center;
}

/* ---------------- 维护团队 ---------------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--beige);
  border: var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-team__item {
  background: var(--warm-white);
  padding: 20px 20px 22px;
  transition: background 0.2s var(--ease);
}

.page-about .about-team__item:hover {
  background: var(--purple-soft);
}

.page-about .about-team__hex {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 44px;
  margin-bottom: 12px;
  background: var(--purple);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.page-about .about-team__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--purple-deep);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------------- 赛季节奏 ---------------- */

.page-about .about-pace__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
  margin-bottom: 36px;
}

.page-about .about-pace__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-pace__step {
  padding-top: 16px;
  border-top: 2px solid var(--purple-soft);
}

.page-about .about-pace__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber-deep);
}

.page-about .about-pace__step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-pace__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------------- 分类体系 ---------------- */

.page-about .about-taxonomy__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-taxonomy__title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: var(--about-line);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gray);
}

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

.page-about .about-taxonomy__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 14px 2px;
  border-bottom: var(--about-line);
  transition: background 0.2s var(--ease);
}

.page-about .about-taxonomy__row:hover {
  background: var(--purple-soft);
}

.page-about .about-taxonomy__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber-deep);
}

.page-about .about-taxonomy__name {
  flex: 0 0 5.5em;
  font-size: 16px;
  font-weight: 600;
  color: var(--purple-deep);
}

.page-about .about-taxonomy__desc {
  flex: 1 1 190px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-taxonomy__intro,
.page-about .about-taxonomy__foot {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .about-taxonomy__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: var(--about-line);
}

.page-about .about-loops {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-loops li {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: var(--purple-soft);
  color: var(--purple-deep);
  font-size: 13.5px;
  white-space: nowrap;
}

.page-about .about-loops li:nth-child(even) {
  background: rgba(168, 213, 162, 0.3);
  color: var(--green-deep);
}

/* ---------------- 版本时间轴 ---------------- */

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--purple-soft) 0%, var(--purple) 12%, var(--purple) 88%, var(--purple-soft) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 34px;
  padding-bottom: 32px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--warm-white);
  border: 2px solid var(--purple);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--green);
  border-color: var(--green-deep);
  transform: scale(1.2);
}

.page-about .about-season {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background: var(--purple-soft);
  color: var(--purple-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .about-timeline__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-timeline__item > p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .about-timeline .drawer {
  border: var(--about-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.66);
  overflow: hidden;
}

.page-about .about-timeline .drawer-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  border: 0;
  background: transparent;
  color: var(--purple-deep);
  font: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s var(--ease);
}

.page-about .about-timeline .drawer-trigger:hover {
  background: var(--purple-soft);
}

.page-about .about-timeline .drawer-body {
  padding: 2px 16px 16px;
  overflow: hidden;
}

.page-about .about-timeline .drawer-body ul {
  margin: 0;
  padding-left: 18px;
}

.page-about .about-timeline .drawer-body li {
  font-size: 14px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------------- 反馈通道 ---------------- */

.page-about .about-support__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding: 28px 22px 30px;
  border: var(--about-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--purple-soft) 0%, rgba(251, 248, 242, 0.96) 60%);
  box-shadow: var(--shadow-soft);
}

.page-about .about-support__mail {
  display: inline-block;
  padding: 1px 7px;
  border-radius: var(--radius-sm);
  background: rgba(107, 63, 160, 0.09);
  color: var(--purple-deep);
  font-family: var(--font-mono);
  font-size: 14.5px;
  word-break: break-all;
}

.page-about .about-support__btn {
  margin-top: 20px;
}

.page-about .about-support__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-support__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--gray);
}

.page-about .about-support__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

/* ---------------- 品牌落款 ---------------- */

.page-about .about-sign {
  padding: 30px 0 56px;
}

.page-about .about-sign__line {
  margin: 0;
  padding-top: 24px;
  border-top: var(--about-line);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.1rem, 3.2vw, 1.55rem);
  letter-spacing: -0.01em;
  color: var(--purple-deep);
  text-align: center;
}

/* ==========================================================
   响应式
   ========================================================== */

@media (min-width: 600px) {
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-pace__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 34px;
  }

  .page-about .about-fact {
    padding: 18px 20px 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 30px 0 52px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
    margin-top: 26px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
  }

  .page-about .about-pace__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
  }

  .page-about .about-taxonomy__cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-support__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    padding: 38px 40px 40px;
    align-items: start;
  }

  .page-about .about-support__aside {
    padding-left: 32px;
    border-left: var(--about-line);
  }
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-pace__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
  }
}

@media (max-width: 599px) {
  .page-about .about-index {
    top: 64px;
  }

  .page-about .about-hero__facts {
    border-radius: var(--radius-md);
  }

  .page-about .about-fact dd {
    font-size: 26px;
  }

  .page-about .about-taxonomy__name {
    flex: 1 1 100%;
  }

  .page-about .about-figure {
    padding: 8px;
    border-radius: var(--radius-md);
  }
}