/* ===== 品牌档案页 ===== */
.page-about {
  --about-radius: 18px 4px 18px 4px;
  --about-radius-sm: 12px 3px 12px 3px;
  --about-rail: 2px;
}

.page-about .about-hero {
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-hero__frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

.page-about .about-hero__lead > .lede {
  margin-top: 1.25rem;
}

.page-about .about-hero__side {
  border-left: var(--about-rail) solid var(--line);
  padding-left: 1.25rem;
}

.page-about .about-hero__label {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-about .about-hero__note {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  font-size: 0.9rem;
  color: var(--body-text);
}

.page-about .about-hero__facts .mono {
  color: var(--lamp);
  margin-right: 0.5rem;
  font-size: 0.95rem;
}

.page-about .about-hero__media {
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
}

/* 01 我们做什么 */
.page-about .about-what__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-what__side {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

.page-about .about-what__quote {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-what__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--lamp);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 255, 159, 0.4);
  padding-bottom: 0.2rem;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.page-about .about-what__arrow {
  transition: transform 0.2s ease;
}

.page-about .about-what__link:hover .about-what__arrow {
  transform: translateX(4px);
}

/* 02 服务覆盖到哪 */
.page-about .about-reach__head .lede {
  margin-top: 1rem;
}

.page-about .about-reach__map {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background-color: rgba(12, 23, 28, 0.5);
  background-image: radial-gradient(circle, var(--line) 1px, transparent 1px);
  background-size: 22px 22px;
}

.page-about .about-reach__zone {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.95rem 1rem;
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: var(--about-radius-sm);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about .about-reach__zone:hover,
.page-about .about-reach__zone:focus-visible {
  outline: none;
  border-color: var(--lamp);
  background: var(--turf);
  transform: translateY(-2px);
}

.page-about .about-reach__count {
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lamp);
}

.page-about .about-reach__name {
  font-size: 0.85rem;
  color: var(--body-text);
}

.page-about .about-reach__zone::after {
  content: attr(data-tip);
  position: absolute;
  left: 0.4rem;
  bottom: calc(100% + 0.6rem);
  z-index: 4;
  max-width: 15rem;
  padding: 0.5rem 0.7rem;
  border-radius: var(--about-radius-sm);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  white-space: normal;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.page-about .about-reach__zone:hover::after,
.page-about .about-reach__zone:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-reach__overseas {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__overseas-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-about .about-reach__chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .about-reach__chips li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--body-text);
  background: var(--stand);
}

.page-about .about-reach__chips .mono {
  color: var(--lamp);
  font-size: 0.9rem;
}

.page-about .about-reach__lang {
  margin: 1.25rem 0 0;
  font-size: 0.9rem;
  color: var(--mist);
}

/* 03 九年时间轴 */
.page-about .about-timeline__head .lede {
  margin-top: 1rem;
}

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

.page-about .about-timeline__rail {
  position: relative;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-left: 1.75rem;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: linear-gradient(180deg, var(--lamp), var(--volt) 55%, rgba(41, 216, 255, 0.12));
  border-radius: 2px;
}

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

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem + 1px);
  top: 1.15rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lamp);
  box-shadow: 0 0 0 4px rgba(77, 255, 159, 0.1), 0 0 14px rgba(77, 255, 159, 0.45);
  z-index: 2;
}

.page-about .about-timeline__trigger {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 0.95rem 1.1rem;
  text-align: left;
  cursor: pointer;
  background: var(--stand);
  color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--about-radius-sm);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-timeline__trigger:hover,
.page-about .about-timeline__trigger:focus-visible {
  border-color: var(--lamp);
  background: var(--turf);
}

.page-about .about-timeline__trigger[aria-expanded="true"] {
  border-color: var(--lamp);
  background: var(--turf);
}

.page-about .about-timeline__year {
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--lamp);
}

.page-about .about-timeline__title {
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--white);
}

.page-about .about-timeline__inner {
  padding: 0.9rem 1.1rem 1.15rem;
  color: var(--body-text);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .about-timeline__inner p {
  margin: 0;
}

/* 04 谁在维护 */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

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

.page-about .about-team__lines {
  list-style: none;
  margin: clamp(2.25rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-team__line {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 0.35rem 1.25rem;
  padding: 1.25rem;
  background: var(--ink);
}

.page-about .about-team__code {
  grid-row: 1 / span 2;
  padding-top: 0.3rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--volt);
}

.page-about .about-team__name {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-team__line p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--body-text);
}

/* 05 长期坚持的做法 */
.page-about .about-practice__list {
  list-style: none;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.page-about .about-practice__item {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 1.25rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--line);
}

.page-about .about-practice__idx {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--lamp);
  padding-top: 0.35rem;
}

.page-about .about-practice__content h3 {
  margin: 0 0 0.6rem;
}

.page-about .about-practice__content p {
  margin: 0;
  color: var(--body-text);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .about-practice__content a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 216, 255, 0.4);
}

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

/* 06 合作与内容生态 */
.page-about .about-partner__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-partner__body .prose a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 216, 255, 0.4);
}

.page-about .about-partner__body .prose a:hover,
.page-about .about-partner__body .prose a:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

.page-about .about-partner__cta {
  margin-top: 1.75rem;
}

.page-about .about-partner__form-trigger {
  width: 100%;
  padding: 1rem 1.15rem;
  text-align: left;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: var(--about-radius-sm);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-partner__form-trigger:hover,
.page-about .about-partner__form-trigger:focus-visible {
  border-color: var(--orange);
  background: var(--turf);
}

.page-about .about-partner__fields {
  margin: 0;
  padding: 1rem 0 0.25rem;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-partner__fields > div {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
}

.page-about .about-partner__fields dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--volt);
}

.page-about .about-partner__fields dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--body-text);
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: end;
  }

  .page-about .about-what__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2.5rem, 6vw, 5rem);
  }

  .page-about .about-what__side {
    padding-top: 4.5rem;
    border-top: none;
    border-left: 1px solid var(--line);
    padding-left: 1.5rem;
  }

  .page-about .about-reach__map {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-auto-rows: minmax(88px, auto);
    gap: 0.85rem;
    padding: 1.25rem;
  }

  .page-about .about-reach__zone--nw { grid-column: 1 / span 3; grid-row: 1; }
  .page-about .about-reach__zone--nc { grid-column: 5 / span 3; grid-row: 1; }
  .page-about .about-reach__zone--ne { grid-column: 9 / span 4; grid-row: 1; }
  .page-about .about-reach__zone--sw { grid-column: 1 / span 3; grid-row: 2; }
  .page-about .about-reach__zone--cc { grid-column: 5 / span 3; grid-row: 2; }
  .page-about .about-reach__zone--ec { grid-column: 9 / span 4; grid-row: 2 / span 2; }
  .page-about .about-reach__zone--sc { grid-column: 5 / span 3; grid-row: 3; }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
  }

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

  .page-about .about-practice__item {
    max-width: 62ch;
  }

  .page-about .about-practice__item:nth-child(2) {
    margin-left: 12%;
  }

  .page-about .about-practice__item:nth-child(3) {
    margin-left: 24%;
  }

  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    gap: clamp(3rem, 7vw, 6rem);
  }
}