/* ===== 品牌价值页 · page-about ===== */

.page-about {
  --about-axis: var(--line);
  --about-gap: 20px;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 30px 0 58px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(115% 88% at 100% 0%, rgba(41, 211, 222, 0.10), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(255, 106, 43, 0.09), transparent 62%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(44, 62, 96, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 62, 96, 0.4) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: radial-gradient(120% 82% at 72% 18%, #000 18%, transparent 76%);
  mask-image: radial-gradient(120% 82% at 72% 18%, #000 18%, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: 38px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--text);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero__intro {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .about-hero__aside {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__year {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(46px, 14vw, 78px);
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-hero__yearcap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 8px 0 0;
}

.page-about .about-hero__vtext {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--muted);
  margin: 0;
  align-self: flex-start;
  max-height: 156px;
}

/* ---------- 章节骨架 ---------- */

.page-about .about-sect {
  padding: 62px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 16px;
  align-items: start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-about .about-head__num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--orange);
  text-decoration: none;
  padding: 4px 9px;
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-head__num:hover,
.page-about .about-head__num:focus-visible {
  border-color: var(--orange);
  color: var(--text);
}

.page-about .about-head__main .eyebrow {
  margin: 0 0 8px;
}

.page-about .about-head__main h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 5.6vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--text);
}

.page-about .about-head__side {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0;
}

.page-about .about-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
  max-width: 68ch;
  margin: 0 0 34px;
}

.page-about .about-note {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  padding-left: 14px;
  border-left: 1px solid var(--orange);
  max-width: 70ch;
}

/* ---------- 01 三件事 ---------- */

.page-about .about-triple {
  display: grid;
  gap: 0;
}

.page-about .about-scene {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-scene__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin: 0 0 10px;
}

.page-about .about-scene h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.32;
  margin: 0 0 12px;
  color: var(--text);
}

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

/* ---------- 02 服务版图 ---------- */

.page-about .about-band {
  margin: 0 0 38px;
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: clamp(170px, 34vw, 340px);
  object-fit: cover;
  max-width: 100%;
  filter: saturate(0.86) contrast(1.06);
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 17, 32, 0.62), rgba(10, 17, 32, 0.14) 46%, rgba(10, 17, 32, 0.88));
  pointer-events: none;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--panel);
  padding: 20px 18px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-stat:hover {
  background: var(--raise);
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 03 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: 26px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-role {
  background: var(--panel);
  padding: 22px 20px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-role:hover {
  background: var(--raise);
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--text);
}

.page-about .about-role__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-about .about-role p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team__side {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-team__side img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(180px, 44vw, 280px);
  object-fit: cover;
  filter: saturate(0.85) contrast(1.04);
}

.page-about .about-team__side figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 04 时间轴 ---------- */

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

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 38px 30px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

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

.page-about .about-tl-item:last-child::before {
  bottom: auto;
  height: 34px;
}

.page-about .about-tl-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--orange);
  transform: rotate(45deg);
}

.page-about .about-tl-item:last-child .about-tl-dot {
  border-color: var(--cyan);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin: 0 0 8px;
}

.page-about .about-tl-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--text);
}

.page-about .about-tl-body > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 60ch;
}

.page-about .about-tl-more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 240ms var(--ease), opacity 240ms var(--ease), margin-top 240ms var(--ease);
}

.page-about .about-tl-more p {
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-tl-item:hover .about-tl-more,
.page-about .about-tl-item:focus-within .about-tl-more {
  max-height: 200px;
  opacity: 1;
  margin-top: 12px;
}

/* ---------- 05 生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: 26px;
}

.page-about .about-eco__fig {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  position: relative;
}

.page-about .about-eco__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(180px, 46vw, 300px);
  object-fit: cover;
  filter: saturate(0.82) contrast(1.06);
}

.page-about .about-eco__fig::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(41, 211, 222, 0.16), transparent 52%, rgba(255, 106, 43, 0.14));
  pointer-events: none;
}

.page-about .about-eco__fig figcaption {
  position: relative;
  z-index: 1;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-eco__text > p {
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
  max-width: 62ch;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-about .about-eco__list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-eco__list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-eco__list span {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

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

.page-about .about-eco__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 211, 222, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-eco__more a:hover,
.page-about .about-eco__more a:focus-visible {
  border-color: var(--cyan);
}

/* ---------- 06 反馈 ---------- */

.page-about .about-feedback {
  display: grid;
  gap: 30px;
}

.page-about .about-feedback__col > p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 56ch;
}

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

.page-about .about-feedback__col h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 16px;
  color: var(--text);
}

.page-about .about-feedback__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: fb;
}

.page-about .about-feedback__list li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-feedback__list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-feedback__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 1px;
  background: var(--lime);
}

.page-about .about-feedback__list span {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text);
}

/* ---------- 收尾承诺 ---------- */

.page-about .about-closing {
  position: relative;
  padding: 62px 0 68px;
  background:
    linear-gradient(115deg, rgba(255, 106, 43, 0.14), transparent 46%),
    linear-gradient(295deg, rgba(41, 211, 222, 0.14), transparent 48%),
    var(--panel);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-closing::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan) 62%, transparent);
}

.page-about .about-closing__inner {
  position: relative;
}

.page-about .about-closing__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
  margin: 0 0 18px;
}

.page-about .about-closing__stmt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 4.6vw, 30px);
  line-height: 1.45;
  letter-spacing: -0.005em;
  margin: 0;
  max-width: 34ch;
  color: var(--text);
}

.page-about .about-closing__act {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 700px) {
  .page-about .about-triple {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-scene {
    padding: 0 26px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-scene:first-child {
    padding-left: 0;
    border-left: 0;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 44px 0 76px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: end;
    gap: 56px;
  }

  .page-about .about-hero__aside {
    padding-top: 22px;
  }

  .page-about .about-sect {
    padding: 96px 0;
  }

  .page-about .about-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 14px 22px;
  }

  .page-about .about-head__side {
    grid-column: 3;
    grid-row: 1;
    text-align: right;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
    gap: 28px;
  }

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

  .page-about .about-team__side img {
    height: auto;
    aspect-ratio: 3 / 2;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-eco__fig img {
    height: auto;
    aspect-ratio: 14 / 9;
  }

  .page-about .about-feedback {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-closing {
    padding: 96px 0 104px;
  }

  .page-about .about-tl-item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 44px;
    padding: 0 0 52px 0;
  }

  .page-about .about-tl-item::before {
    left: 118px;
    top: 8px;
  }

  .page-about .about-tl-item:last-child::before {
    height: 42px;
  }

  .page-about .about-tl-dot {
    left: 113px;
    top: 8px;
  }

  .page-about .about-tl-year {
    grid-column: 1;
    text-align: right;
    margin: 6px 0 0;
  }

  .page-about .about-tl-body {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-more {
    transition: none;
  }

  .page-about .about-head__num,
  .page-about .about-stat,
  .page-about .about-role,
  .page-about .about-eco__more a {
    transition: none;
  }
}