/* ============================================================
   page-about · 品牌文化
   ============================================================ */

.page-about {
  --about-body: rgba(232, 240, 234, 0.82);
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  --about-lime-soft: rgba(198, 255, 74, 0.14);
  --about-rose-soft: rgba(255, 61, 127, 0.18);
  color: var(--text);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

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

.page-about .crumbs {
  margin-block: clamp(1.5rem, 3.5vw, 2.5rem) 0;
}

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

.page-about .about-hero {
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(2.75rem, 7vw, 5.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.page-about .about-idx {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 clamp(1rem, 2.5vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-idx::before {
  content: "";
  width: 2.25rem;
  height: 1px;
  background: var(--lime);
  flex: none;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(1.1rem, 2.5vw, 1.75rem);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.35rem, 6.4vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.005em;
  color: var(--text);
  max-width: 16ch;
}

.page-about .about-hero__title .hl {
  color: var(--lime);
  font-weight: 400;
}

.page-about .about-hero__lede {
  max-width: 52ch;
  margin: 0;
  color: var(--about-body);
  line-height: 1.9;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: clamp(0.85rem, 2vw, 1.15rem) clamp(0.85rem, 2vw, 1.25rem);
  background: var(--ink-900);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-about .about-hero__cap {
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  color: var(--muted);
}

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .page-about .about-hero__fig::after {
    content: "";
    position: absolute;
    inset: 18px -18px -18px 18px;
    border: 1px solid var(--border);
    pointer-events: none;
    z-index: -1;
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

.page-about .about-toc {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  background: linear-gradient(180deg, var(--ink-950) 0%, rgba(16, 20, 20, 0.94) 100%);
  border-block: 1px solid var(--border-soft);
}

.page-about .about-toc .wrap {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.page-about .about-toc__label {
  display: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: clamp(1rem, 2.6vw, 2.25rem);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding-block: 0.95rem;
  border-bottom: 2px solid transparent;
  font-size: var(--step--1);
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-toc__link span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--line);
}

.page-about .about-toc__link:hover {
  color: var(--text);
}

.page-about .about-toc__link[aria-current] {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-toc__link[aria-current] span {
  color: var(--lime);
}

@media (min-width: 900px) {
  .page-about .about-toc__label {
    display: block;
  }
}

@media (min-width: 1024px) {
  .page-about .about-toc {
    top: 0;
  }
}

/* ---------------- 通用章节骨架 ---------------- */

.page-about .about-chapter {
  padding-block: clamp(3.25rem, 8vw, 7.5rem);
  border-top: 1px solid var(--border-soft);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-chapter__idx {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.7rem, 3.6vw, 2.9rem);
  line-height: 1.05;
  letter-spacing: -0.005em;
  color: var(--text);
  max-width: 18ch;
}

.page-about .about-chapter__note {
  margin: 0.9rem 0 0;
  max-width: 46ch;
  font-size: var(--step-0);
  color: var(--muted);
  line-height: 1.75;
}

.page-about .about-chapter__body p {
  margin: 0 0 1.15em;
  max-width: 62ch;
  line-height: 1.9;
  color: var(--about-body);
}

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

.page-about .about-chapter__body a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 74, 0.4);
  transition: border-color 0.18s ease;
}

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

@media (min-width: 940px) {
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 0.44fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 5.5rem);
    align-items: start;
  }

  .page-about .about-chapter__grid--split {
    grid-template-columns: minmax(0, 0.44fr) minmax(0, 1.15fr);
  }
}

/* ---------------- 演进折线 ---------------- */

.page-about .about-line {
  margin: clamp(2rem, 5vw, 3.25rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-about .about-line__svg {
  display: block;
  width: 100%;
  height: clamp(56px, 8vw, 104px);
  color: var(--lime);
  opacity: 0.85;
}

.page-about .about-line__cap {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------------- 时间轴 ---------------- */

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

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(2rem, 5vw, 3.25rem) clamp(2rem, 4vw, 2.75rem);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 20px;
  bottom: -2px;
  width: 1px;
  background: var(--border-soft);
}

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

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--line);
  background: var(--ink-900);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-about .tl__item.is-in .tl__dot {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 5px var(--about-lime-soft);
}

.page-about .tl__item--now.is-in .tl__dot {
  background: var(--rose);
  border-color: var(--rose);
  box-shadow: 0 0 0 5px var(--about-rose-soft);
}

.page-about .tl__epoch {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .tl__item--now .tl__epoch {
  color: var(--rose);
}

.page-about .tl__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.15rem, 2.3vw, 1.6rem);
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .tl__desc {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--about-body);
}

@media (min-width: 780px) {
  .page-about .tl__item {
    display: grid;
    grid-template-columns: clamp(9rem, 14vw, 13rem) minmax(0, 1fr);
    column-gap: clamp(1.5rem, 3vw, 3rem);
  }

  .page-about .tl__epoch {
    grid-column: 1;
    grid-row: 1 / span 2;
    margin: 0;
    padding-top: 0.15rem;
  }

  .page-about .tl__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .tl__desc {
    grid-column: 2;
    grid-row: 2;
  }
}

/* ---------------- 团队数据 ---------------- */

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}

.page-about .about-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: clamp(0.9rem, 2vw, 1.3rem);
  background: var(--panel);
}

.page-about .about-stats .stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .about-stats .stat__label {
  font-size: var(--step--1);
  color: var(--muted);
  letter-spacing: 0.04em;
}

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

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------------- 云南 ---------------- */

.page-about .about-region {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  max-width: 34rem;
}

.page-about .about-region__kick {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-region__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-region__txt {
  margin: 0.85rem 0 0;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------------- 合作生态 ---------------- */

.page-about .about-eco {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}

.page-about .about-eco__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  padding: clamp(0.9rem, 2vw, 1.25rem) clamp(1rem, 2.5vw, 1.5rem);
  background: var(--ink-900);
}

.page-about .about-eco__k {
  font-family: var(--font-display);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-eco__v {
  font-size: var(--step--1);
  line-height: 1.75;
  color: var(--about-body);
}

@media (min-width: 700px) {
  .page-about .about-eco__item {
    grid-template-columns: minmax(0, 9.5rem) minmax(0, 1fr);
    align-items: baseline;
    gap: 1.25rem;
  }
}

.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1rem;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: clamp(1.1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--border);
  border-left: 3px solid var(--rose);
  background: rgba(18, 59, 53, 0.55);
}

.page-about .about-honor__txt {
  margin: 0;
  flex: 1 1 18rem;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------------- 白皮书 ---------------- */

.page-about .about-docs {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}

.page-about .about-docs__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: clamp(1rem, 2.5vw, 1.4rem) clamp(1rem, 2.5vw, 1.5rem);
  background: var(--ink-950);
}

.page-about .about-docs__k {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-docs__t {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .about-docs__d,
.page-about .about-docs__k2 {
  font-size: var(--step--1);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-docs__fig {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

@media (min-width: 700px) {
  .page-about .about-docs__item {
    grid-template-columns: minmax(0, 5rem) minmax(0, 12rem) minmax(0, 1fr);
    align-items: baseline;
    gap: 1.25rem;
  }
}

/* ---------------- 结尾行动 ---------------- */

.page-about .about-cta {
  border-top: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(18, 59, 53, 0.85) 0%, rgba(11, 31, 26, 0.95) 58%, rgba(16, 20, 20, 1) 100%);
}

.page-about .about-cta__inner {
  padding-block: clamp(2.75rem, 7vw, 5rem);
}

.page-about .about-cta__eyebrow {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-cta__line {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.15;
  color: var(--text);
  max-width: 22ch;
}

.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}