/* ============================================
   品牌与服务网络 / about
   ============================================ */

.page-about {
  --about-axis: clamp(18px, 3vw, 34px);
  --about-gutter: clamp(54px, 8vw, 104px);
  display: block;
  background: var(--c-paper);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 38px);
}
.page-about .about-crumbs__sep {
  margin-inline: 9px;
  color: var(--c-copper);
}

/* ---------- 通用区块标题 ---------- */
.page-about .about-head {
  max-width: 68ch;
  margin-bottom: clamp(26px, 4vw, 52px);
}
.page-about .about-head .index {
  display: block;
  margin: 0 0 16px;
  color: var(--c-ochre);
}
.page-about .about-head .display-2 {
  margin: 0 0 18px;
  color: var(--c-ink);
  font-weight: 400;
  letter-spacing: -0.015em;
}
.page-about .about-head .lede {
  margin: 0;
  max-width: 48ch;
  color: var(--c-char);
}

/* ============================================
   01 — 首屏
   ============================================ */
.page-about .about-hero {
  padding-block: clamp(26px, 5vw, 66px) clamp(44px, 7vw, 96px);
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4.5vw, 44px);
}
.page-about .about-hero__head .index {
  display: block;
  margin: 0 0 20px;
  color: var(--c-ochre);
}
.page-about .about-hero__head h1 {
  margin: 0;
  max-width: 20ch;
  color: var(--c-ink);
  font-weight: 400;
  letter-spacing: -0.022em;
  line-height: 1.03;
}
.page-about .about-hero__body {
  border-left: 2px solid var(--c-green);
  padding-left: clamp(16px, 2.2vw, 28px);
}
.page-about .about-hero__body p {
  margin: 0 0 15px;
  max-width: 42ch;
}
.page-about .about-hero__body p:last-child {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(12, 1fr);
    column-gap: clamp(22px, 2.4vw, 36px);
  }
  .page-about .about-hero__head {
    grid-column: 1 / span 7;
  }
  .page-about .about-hero__body {
    grid-column: 9 / span 4;
    align-self: end;
  }
}

/* 关键指标 */
.page-about .about-stats {
  margin-top: clamp(36px, 6vw, 80px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-rule);
  border-block: 1px solid var(--c-rule);
}
.page-about .stat {
  background: var(--c-paper);
  padding: clamp(18px, 3vw, 32px) clamp(14px, 2vw, 24px);
}
.page-about .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.85rem, 5.2vw, 3rem);
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--c-green);
}
.page-about .stat__num small {
  margin-left: 5px;
  font-size: 0.32em;
  letter-spacing: 0.02em;
  color: var(--c-char);
}
.page-about .stat__label {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-ochre);
}

@media (min-width: 880px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============================================
   02 — 十二类服务
   ============================================ */
.page-about .about-scope {
  padding-block: clamp(48px, 8vw, 104px);
  border-top: 1px solid var(--c-rule);
}
.page-about .scope-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}
.page-about .scope-stage {
  position: relative;
  background: var(--c-paper);
  border: 1px solid var(--c-rule);
  padding: clamp(22px, 2.8vw, 32px) clamp(20px, 2.4vw, 28px);
  transition: border-color var(--t-fast) var(--ease);
}
.page-about .scope-stage::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 22px;
  height: 22px;
  background: linear-gradient(225deg, var(--c-mist) 50%, transparent 50%);
  pointer-events: none;
}
.page-about .scope-stage:hover {
  border-color: var(--c-green-mid);
}
.page-about .scope-stage__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-ochre);
}
.page-about .scope-stage__title {
  margin: 0 0 18px;
  font-size: 19px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -0.01em;
}
.page-about .scope-stage__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .scope-stage__list li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--c-rule);
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-char);
}
.page-about .scope-stage__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .scope-stage__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-copper);
  padding-top: 4px;
}

@media (min-width: 860px) {
  .page-about .scope-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .scope-stage:nth-child(2) {
    margin-top: clamp(20px, 3vw, 40px);
  }
}

/* ============================================
   03 — 大区索引
   ============================================ */
.page-about .about-network {
  padding-block: clamp(48px, 8vw, 104px);
  background: var(--c-mist);
  border-block: 1px solid var(--c-rule);
}
.page-about .about-network__figure {
  margin: 0 0 clamp(24px, 3.6vw, 44px);
}
.page-about .about-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-network__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-char);
  max-width: 62ch;
}

/* 快速定位 */
.page-about .region-jump {
  margin-bottom: clamp(18px, 3vw, 30px);
}
.page-about .region-jump ul {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-about .region-jump ul::-webkit-scrollbar {
  display: none;
}
.page-about .region-jump a {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 16px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--c-ink);
  background: var(--c-paper);
  border: 1px solid var(--c-rule);
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease);
}
.page-about .region-jump a:hover,
.page-about .region-jump a:focus-visible {
  color: var(--c-paper);
  background: var(--c-green);
  border-color: var(--c-green);
}

/* 大区列表 */
.page-about .region-list {
  border-top: 1px solid var(--c-rule);
}
.page-about .region {
  border-bottom: 1px solid var(--c-rule);
  scroll-margin-top: 24px;
}
.page-about .region[open] {
  background: var(--c-paper);
}
.page-about .region__sum {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 18px;
  grid-template-areas:
    "code name chev"
    "code meta chev";
  row-gap: 6px;
  column-gap: 14px;
  align-items: center;
  padding: 18px 8px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--t-fast) var(--ease);
}
.page-about .region__sum::-webkit-details-marker {
  display: none;
}
.page-about .region__sum::marker {
  content: "";
}
.page-about .region__sum:hover {
  background-color: rgba(46, 140, 114, 0.09);
}
.page-about .region__sum:focus-visible {
  outline: 2px solid var(--c-green-mid);
  outline-offset: -2px;
}
.page-about .region__code {
  grid-area: code;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-copper);
  align-self: center;
}
.page-about .region__name {
  grid-area: name;
  font-size: 17px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -0.005em;
}
.page-about .region__name em {
  margin-left: 10px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--c-ochre);
}
.page-about .region__meta {
  grid-area: meta;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-char);
  opacity: 0.85;
}
.page-about .region__chev {
  grid-area: chev;
  justify-self: end;
  display: block;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--c-green);
  border-bottom: 1.5px solid var(--c-green);
  transform: rotate(45deg);
  transition: transform var(--t-base) var(--ease);
}
.page-about .region[open] .region__chev {
  transform: rotate(-135deg);
}

.page-about .region__body {
  padding: 2px 8px clamp(24px, 3vw, 36px);
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}
.page-about .region__prov-name {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-ochre);
}
.page-about .region__points {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .region__points li {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-char);
  border-bottom: 1px solid var(--c-rule);
}
.page-about .region__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 7px;
  height: 1px;
  background: var(--c-copper);
}

@media (min-width: 760px) {
  .page-about .region__sum {
    grid-template-columns: 52px minmax(0, 1fr) 20px;
    padding: 20px 10px;
  }
  .page-about .region__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-inline: 10px;
    column-gap: clamp(24px, 3vw, 48px);
  }
}
@media (min-width: 1080px) {
  .page-about .region__body {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ============================================
   04 — 服务节奏
   ============================================ */
.page-about .about-pace {
  padding-block: clamp(48px, 8vw, 104px);
}
.page-about .pace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}
.page-about .pace-item {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--c-paper);
  border-top: 2px solid var(--c-green);
  transition: background-color var(--t-base) var(--ease);
}
.page-about .pace-item:hover,
.page-about .pace-item:focus-within {
  background: var(--c-mist);
}
.page-about .pace-item:focus-visible {
  outline: 2px solid var(--c-green-mid);
  outline-offset: 2px;
}
.page-about .pace-item__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-ink);
}
.page-about .pace-item__num i {
  font-style: normal;
  margin-left: 7px;
  font-size: 0.38em;
  letter-spacing: 0.04em;
  color: var(--c-ochre);
}
.page-about .pace-item__title {
  margin: 16px 0 9px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -0.005em;
}
.page-about .pace-item__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-char);
  opacity: 0.72;
  transition: opacity var(--t-base) var(--ease);
}
.page-about .pace-item:hover .pace-item__hint,
.page-about .pace-item:focus-within .pace-item__hint {
  opacity: 1;
}

@media (min-width: 700px) {
  .page-about .pace-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1060px) {
  .page-about .pace-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .pace-item:nth-child(1) { grid-column: span 3; }
  .page-about .pace-item:nth-child(2) { grid-column: span 3; }
  .page-about .pace-item:nth-child(3) { grid-column: span 2; }
  .page-about .pace-item:nth-child(4) { grid-column: span 2; }
  .page-about .pace-item:nth-child(5) { grid-column: span 2; }
}

/* ============================================
   05 — 工程师团队
   ============================================ */
.page-about .about-crew {
  padding-block: clamp(48px, 8vw, 112px);
  background: var(--c-ink);
}
.page-about .crew-grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 56px);
}
.page-about .crew-copy .index {
  display: block;
  margin: 0 0 16px;
  color: var(--c-green-light);
}
.page-about .crew-copy .display-2 {
  margin: 0 0 20px;
  color: var(--c-paper);
  font-weight: 400;
  letter-spacing: -0.015em;
}
.page-about .crew-copy .lede {
  margin: 0 0 16px;
  max-width: 46ch;
  color: var(--c-mist);
}
.page-about .crew-copy > p:not(.index):not(.lede) {
  margin: 0;
  max-width: 48ch;
  color: rgba(247, 244, 236, 0.78);
}

.page-about .crew-facts {
  margin-top: clamp(26px, 3.4vw, 40px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 244, 236, 0.18);
}
.page-about .crew-fact {
  background: var(--c-ink);
  padding: clamp(16px, 2vw, 24px);
}
.page-about .crew-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-green-light);
}
.page-about .crew-fact__num small {
  margin-left: 4px;
  font-size: 0.38em;
  letter-spacing: 0.02em;
  color: rgba(247, 244, 236, 0.66);
}
.page-about .crew-fact__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.09em;
  color: var(--c-mist);
}

.page-about .crew-media {
  margin: 0;
}
.page-about .crew-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .crew-media figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.66);
}

@media (min-width: 900px) {
  .page-about .crew-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    column-gap: clamp(32px, 4.5vw, 72px);
  }
}

/* ============================================
   06 — 年度版本历程
   ============================================ */
.page-about .about-years {
  padding-block: clamp(48px, 8vw, 112px);
  border-top: 1px solid var(--c-rule);
}
.page-about .years-banner {
  margin: 0 0 clamp(32px, 5vw, 60px);
}
.page-about .years-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .year-track {
  position: relative;
  padding-left: var(--about-gutter);
}
.page-about .year-track::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom,
    var(--c-green) 0%,
    var(--c-green-light) 48%,
    var(--c-copper) 100%);
}
.page-about .year {
  position: relative;
  border-bottom: 1px solid var(--c-rule);
}
.page-about .year:last-child {
  border-bottom: 0;
}
.page-about .year__sum {
  position: relative;
  display: block;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--t-fast) var(--ease);
}
.page-about .year__sum::-webkit-details-marker {
  display: none;
}
.page-about .year__sum::marker {
  content: "";
}
.page-about .year__sum::before {
  content: "";
  position: absolute;
  left: calc(var(--about-axis) - var(--about-gutter) - 5px);
  top: 30px;
  width: 10px;
  height: 10px;
  background: var(--c-paper);
  border: 1.5px solid var(--c-copper);
  transform: rotate(45deg);
  transition: background-color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.page-about .year[open] .year__sum::before {
  background: var(--c-green);
  border-color: var(--c-green);
}
.page-about .year__sum:hover .year__num {
  color: var(--c-ochre);
}
.page-about .year__sum:focus-visible {
  outline: 2px solid var(--c-green-mid);
  outline-offset: 2px;
}
.page-about .year__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-ink);
  transition: color var(--t-fast) var(--ease);
}
.page-about .year__title {
  display: block;
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-char);
}
.page-about .year__body {
  padding-bottom: clamp(16px, 2.4vw, 28px);
  padding-right: clamp(4px, 1.6vw, 24px);
}
.page-about .year__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-char);
}

@media (min-width: 820px) {
  .page-about .year__sum {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 44px);
    align-items: baseline;
    padding: 24px 0;
  }
  .page-about .year__title {
    margin-top: 0;
    font-size: 16px;
  }
  .page-about .year__sum::before {
    top: 34px;
  }
}

/* ============================================
   07 — 服务场景与合作
   ============================================ */
.page-about .about-cases {
  padding-block: clamp(48px, 8vw, 104px);
  background: var(--c-mist);
  border-block: 1px solid var(--c-rule);
}
.page-about .scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(14, 46, 39, 0.14);
  border: 1px solid rgba(14, 46, 39, 0.14);
}
.page-about .scene-card {
  background: var(--c-paper);
  padding: clamp(20px, 2.6vw, 30px);
  transition: background-color var(--t-base) var(--ease);
}
.page-about .scene-card:hover {
  background: var(--c-paper);
  box-shadow: inset 3px 0 0 var(--c-green);
}
.page-about .scene-card__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -0.005em;
}
.page-about .scene-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-char);
}

@media (min-width: 680px) {
  .page-about .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .scene-card:last-child {
    grid-column: span 2;
  }
}
@media (min-width: 1040px) {
  .page-about .scene-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .scene-card:last-child {
    grid-column: span 1;
  }
}

/* 合作条 */
.page-about .coop-strip {
  margin-top: clamp(24px, 3.6vw, 44px);
  padding: clamp(22px, 3vw, 36px);
  background: var(--c-paper);
  border-left: 3px solid var(--c-ochre-bright);
}
.page-about .coop-strip__title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
}
.page-about .coop-strip__text {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-char);
}
.page-about .coop-strip__actions {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================
   收尾
   ============================================ */
.page-about .about-cta {
  padding-block: clamp(40px, 6vw, 88px);
}
.page-about .cta-panel {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(26px, 4vw, 52px);
  background: var(--c-green);
  color: var(--c-paper);
  overflow: hidden;
}
.page-about .cta-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(247, 244, 236, 0.22);
  transform: rotate(45deg);
  pointer-events: none;
}
.page-about .cta-panel__text .display-3 {
  margin: 0 0 14px;
  color: var(--c-paper);
  font-weight: 400;
  letter-spacing: -0.012em;
}
.page-about .cta-panel__text p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.86);
}
.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.page-about .about-cta .btn {
  background: var(--c-paper);
  color: var(--c-ink);
  border-color: var(--c-paper);
}
.page-about .about-cta .btn:hover {
  background: var(--c-mist);
  border-color: var(--c-mist);
}
.page-about .about-cta .btn--ghost {
  background: transparent;
  color: var(--c-paper);
  border-color: rgba(247, 244, 236, 0.55);
}
.page-about .about-cta .btn--ghost:hover {
  background: rgba(247, 244, 236, 0.12);
  border-color: var(--c-paper);
  color: var(--c-paper);
}
.page-about .cta-note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-char);
}

@media (min-width: 900px) {
  .page-about .cta-panel {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
    column-gap: clamp(32px, 5vw, 72px);
  }
  .page-about .cta-actions {
    justify-content: flex-end;
  }
}

/* 窄屏防溢出 */
.page-about img,
.page-about svg {
  max-width: 100%;
}
.page-about .region__sum,
.page-about .year__sum {
  -webkit-tap-highlight-color: transparent;
}
@media (max-width: 420px) {
  .page-about .stat__num {
    font-size: 1.6rem;
  }
  .page-about .region__name em {
    display: block;
    margin-left: 0;
    margin-top: 4px;
  }
}
<<<END>>>