/* ============ 品牌档案页 专属样式 ============ */
.page-about {
  position: relative;
  background: var(--ink);
  color: var(--paper);
}

/* 左侧竖向固定导引 */
.about-rail {
  display: none;
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.35em;
  color: var(--stone);
  font-family: var(--font-sans);
  pointer-events: none;
}
@media (min-width: 1280px) {
  .about-rail {
    display: block;
  }
}

/* ===== 封面档案夹 ===== */
.about-cover {
  position: relative;
  padding: calc(var(--header-h-mobile) + 28px) 0 56px;
  overflow: hidden;
  background: var(--ink);
}
.about-cover::before {
  content: "";
  position: absolute;
  right: -18%;
  top: 0;
  width: 62%;
  height: 100%;
  background: linear-gradient(130deg, rgba(255, 106, 27, 0.32), rgba(255, 106, 27, 0.06));
  clip-path: polygon(18% 0, 100% 0, 82% 100%, 0 100%);
  pointer-events: none;
}
.about-cover__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.about-cover .breadcrumb {
  margin-bottom: 24px;
}
.page-about .about-cover .breadcrumb__current {
  color: var(--brand);
}
.about-cover__kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--brand);
  margin: 0 0 12px;
}
.about-cover__title {
  font-size: clamp(30px, 7vw, 48px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--paper);
}
.about-cover__lead {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--soft-paper);
  margin: 0 0 16px;
}
.about-cover__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
  max-width: 58ch;
  margin: 0;
}
.about-cover__stamp {
  position: relative;
  background: var(--brand);
  color: var(--ink);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  clip-path: polygon(16px 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  box-shadow: 8px 12px 0 rgba(11, 12, 14, 0.6), 8px 12px 24px rgba(0, 0, 0, 0.3);
}
.about-cover__est {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  opacity: 0.75;
}
.about-cover__year {
  font-family: var(--font-num);
  font-size: 68px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.about-cover__team {
  display: inline-block;
  align-self: flex-start;
  font-size: 15px;
  font-weight: 800;
  margin-top: 8px;
  background: var(--ink);
  color: var(--brand);
  padding: 4px 10px;
}
.about-cover__loc {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.7;
  margin-top: 8px;
}
@media (min-width: 768px) {
  .about-cover {
    padding: calc(var(--header-h) + 48px) 0 80px;
  }
  .about-cover__inner {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 48px;
  }
  .about-cover__content {
    flex: 1;
    padding-right: 32px;
  }
  .about-cover__stamp {
    width: 320px;
    flex-shrink: 0;
    padding: 44px 36px;
    margin-bottom: 8px;
  }
  .about-cover__year {
    font-size: 84px;
  }
}

/* ===== 01 档案概要 ===== */
.about-summary__lead {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
  margin: 32px 0 16px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.about-summary__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--soft-paper);
  margin: 0 0 16px;
  max-width: 66ch;
}
.about-summary__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ===== 02 发展里程碑 ===== */
.about-milestones__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.about-milestones__list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--brand) 0%, var(--brand) 4px, var(--line) 4px, var(--line) 96%, transparent 100%);
}
.about-milestones__item {
  position: relative;
  padding: 0 0 0 44px;
}
.about-milestones__dot {
  position: absolute;
  left: 4px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(255, 106, 27, 0.16);
}
.about-milestones__card {
  background: rgba(27, 42, 74, 0.5);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  padding: 20px 20px 16px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}
.about-milestones__card:hover {
  background: rgba(27, 42, 74, 0.8);
  border-color: rgba(255, 106, 27, 0.5);
}
.about-milestones__year {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 8px;
}
.about-milestones__card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--paper);
}
.about-milestones__card p {
  font-size: 14px;
  line-height: 1.65;
  margin: 0 0 12px;
  color: var(--soft-paper);
}
.about-milestones__growth {
  margin: 48px 0 0;
}
.about-milestones__growth img {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  border: 1px solid var(--line);
  margin: 0 auto;
}
.about-milestones__growth figcaption {
  font-size: 12px;
  text-align: center;
  color: var(--stone);
  margin-top: 14px;
}
.about-milestones__stats {
  margin: 48px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.about-milestones__stat {
  padding: 24px 12px;
  text-align: center;
  border-right: 1px solid var(--line);
}
.about-milestones__stat:last-child {
  border-right: 0;
}
.about-milestones__num {
  display: block;
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  color: var(--brand);
  line-height: 1;
}
.about-milestones__label {
  display: block;
  font-size: 12px;
  color: var(--stone);
  margin-top: 6px;
}
@media (min-width: 768px) {
  .about-milestones__item {
    width: calc(100% - 24px);
  }
  .about-milestones__item:nth-child(2n) .about-milestones__card {
    margin-left: 8%;
  }
  .about-milestones__num {
    font-size: 52px;
  }
}

/* ===== 03 团队与能力 ===== */
.about-team {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-team .section-head__title {
  color: var(--ink);
}
.page-about .about-team .section-head__note {
  color: var(--stone);
}
.page-about .about-team .section-num {
  color: var(--brand);
}
.page-about .about-team .section-head__line {
  background: var(--ink);
}
.about-team__grid {
  display: grid;
  gap: 40px;
  margin-top: 40px;
}
.about-team__heading {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--ink);
}
.about-team__bar {
  margin-bottom: 22px;
}
.about-team__bar-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.about-team__bar-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.about-team__bar-count {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--brand);
}
.about-team__bar-track {
  height: 10px;
  background: rgba(27, 42, 74, 0.12);
  border-radius: 2px;
  overflow: hidden;
}
.about-team__bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--deep-blue) 0%, var(--brand) 100%);
  border-radius: 2px;
}
.about-team__note {
  font-size: 13px;
  color: var(--stone);
  line-height: 1.6;
  background: rgba(27, 42, 74, 0.05);
  border-left: 3px solid var(--brand);
  padding: 12px 16px;
  margin: 8px 0 0;
}
.about-team__figure {
  margin: 0;
}
.about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(27, 42, 74, 0.15);
}
.about-team__figure figcaption {
  font-size: 12px;
  color: var(--stone);
  margin-top: 12px;
  text-align: right;
}
@media (min-width: 900px) {
  .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }
  .about-team__figure img {
    max-width: 560px;
    margin-left: auto;
  }
}

/* ===== 04 资质与认证 ===== */
.about-cert {
  border-top: 1px solid var(--line);
}
.about-cert__table {
  margin-top: 36px;
  border-top: 1px solid var(--line);
}
.about-cert__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.about-cert__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--stone);
  text-transform: uppercase;
}
.about-cert__value {
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}
.about-cert__status {
  justify-self: start;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: rgba(255, 106, 27, 0.12);
  padding: 4px 10px;
  border-radius: 2px;
}
.about-cert__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
  margin: 28px 0 0;
  max-width: 68ch;
}
.about-cert__more {
  color: var(--soft-paper);
}
.about-cert__more a {
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 27, 0.4);
}
.about-cert__more a:hover {
  border-color: var(--brand);
}
@media (min-width: 768px) {
  .about-cert__row {
    grid-template-columns: 150px 1fr 140px;
    gap: 24px;
    align-items: center;
  }
  .about-cert__status {
    justify-self: end;
  }
}

/* ===== 05 办公地址与联系 ===== */
.about-office {
  border-top: 1px solid var(--line);
}
.about-office__grid {
  display: grid;
  gap: 40px;
  margin-top: 40px;
}
.about-office__ticket {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding: 32px 28px 24px;
  border-radius: 2px;
  border: 1px solid var(--soft-paper);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
}
.about-office__ticket::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background-image: repeating-linear-gradient(90deg, var(--ink), var(--ink) 5px, transparent 5px, transparent 9px);
}
.about-office__ticket-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px dashed rgba(11, 12, 14, 0.2);
}
.about-office__ticket-no {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--stone);
  letter-spacing: 0.08em;
}
.about-office__meta {
  margin: 0;
}
.about-office__meta div {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(11, 12, 14, 0.08);
}
.about-office__meta dt {
  font-size: 13px;
  color: var(--stone);
}
.about-office__meta dd {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin: 0;
  line-height: 1.5;
}
.about-office__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--stone);
  margin: 20px 0 0;
  padding: 10px 12px;
  background: rgba(27, 42, 74, 0.06);
  border-left: 3px solid var(--gold);
}
.about-office__action {
  display: inline-block;
  margin-top: 20px;
  background: var(--brand);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 22px;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: clip-path 0.2s var(--ease);
}
.about-office__action:hover {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.about-office__map {
  margin: 0;
}
.about-office__map img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}
.about-office__map figcaption {
  font-size: 12px;
  color: var(--stone);
  margin-top: 12px;
  text-align: right;
}
.about-office__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.about-office__link {
  font-size: 13px;
  font-weight: 500;
  color: var(--soft-paper);
  padding: 8px 16px;
  border: 1px solid var(--line);
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.about-office__link:hover {
  color: var(--brand);
  border-color: var(--brand);
  background: rgba(255, 106, 27, 0.06);
}
@media (min-width: 900px) {
  .about-office__grid {
    grid-template-columns: 400px 1fr;
    gap: 48px;
    align-items: center;
  }
  .about-office__map img {
    max-width: 600px;
  }
}