/* ===== 品牌与使命 / page-about ===== */

.page-about {
  --about-axis: 56px;
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: clamp(18px, 3vw, 30px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 3vw, 34px) clamp(38px, 5vw, 64px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: clamp(280px, 48vw, 660px);
  height: clamp(280px, 48vw, 660px);
  background: radial-gradient(circle at 50% 50%, rgba(245, 160, 60, 0.16), rgba(245, 160, 60, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -18%;
  width: clamp(240px, 40vw, 520px);
  height: clamp(240px, 40vw, 520px);
  background: radial-gradient(circle at 50% 50%, rgba(79, 179, 160, 0.13), rgba(79, 179, 160, 0) 70%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 50px);
  align-items: center;
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.34fr) minmax(0, 1fr);
  }
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 12px;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin: 0;
  max-width: 18em;
}

.page-about .about-hero-copy h1 em {
  font-style: normal;
  color: var(--mark);
  display: inline;
}

.page-about .about-hero-lead {
  margin: clamp(16px, 2vw, 22px) 0 0;
  max-width: 38em;
  color: var(--fg-dim);
  font-size: clamp(15.5px, 1.4vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero-actions {
  margin-top: clamp(22px, 3vw, 32px);
  gap: 12px;
}

/* 首屏 SVG */
.page-about .about-hero-visual {
  position: relative;
  min-width: 0;
  padding: clamp(16px, 2.4vw, 26px);
  background: linear-gradient(158deg, rgba(37, 51, 92, 0.9), rgba(10, 18, 41, 0.72));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--cut-lg)) 0, 100% var(--cut-lg), 100% 100%, var(--cut-lg) 100%, 0 calc(100% - var(--cut-lg)));
}

.page-about .about-flow {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-visual-note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  text-align: right;
}

/* 首屏数据条 */
.page-about .about-hero-facts {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 760px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--night);
  padding: 15px clamp(14px, 1.8vw, 22px) 17px;
}

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--mark);
}

.page-about .about-fact-label {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

/* ---------- 通用小节头 ---------- */
.page-about .about-sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-about .about-sec-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin: 0;
}

.page-about .about-sec-note {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
}

/* ---------- 起点 ---------- */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

@media (min-width: 820px) {
  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 0.36fr) minmax(0, 1fr);
  }
}

.page-about .about-origin-mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(52px, 9vw, 96px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: rgba(79, 179, 160, 0.34);
}

.page-about .about-origin-body p {
  margin: 0 0 16px;
  max-width: 38em;
  color: var(--fg-dim);
  font-size: clamp(15.5px, 1.35vw, 17px);
  line-height: 1.85;
}

.page-about .about-origin-body p:last-of-type {
  margin-bottom: 22px;
}

.page-about .about-origin-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-origin-list li {
  position: relative;
  padding-left: 22px;
  color: var(--fg);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-origin-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 三条线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 22px);
}

@media (min-width: 880px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-line {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  background: linear-gradient(180deg, rgba(37, 51, 92, 0.88), rgba(16, 28, 61, 0.92));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--cut-md)) 0, 100% var(--cut-md), 100% 100%, 0 100%);
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease), background 0.32s var(--ease);
  outline: none;
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 52px;
  height: 3px;
  background: var(--amber);
  transition: width 0.32s var(--ease);
}

.page-about .about-line--celadon::before {
  background: var(--celadon);
}

.page-about .about-line--mist::before {
  background: var(--fg-dim);
}

.page-about .about-line:hover,
.page-about .about-line:focus-visible {
  transform: translateY(-5px);
  border-color: rgba(245, 160, 60, 0.42);
  background: linear-gradient(180deg, rgba(45, 61, 106, 0.94), rgba(16, 28, 61, 0.96));
}

.page-about .about-line:hover::before,
.page-about .about-line:focus-visible::before {
  width: 100%;
}

.page-about .about-line-num {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
}

.page-about .about-line-title {
  margin: 10px 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 1.9vw, 25px);
  line-height: 1.25;
  color: var(--fg);
}

.page-about .about-line-role {
  margin: 0 0 16px;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--mark);
}

.page-about .about-line-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-line-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-dim);
}

.page-about .about-line-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  background: var(--celadon);
  transform: rotate(45deg);
}

.page-about .about-line--mist .about-line-list li::before {
  background: var(--fg-dim);
}

.page-about .about-lines-foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px clamp(16px, 2vw, 22px);
  border-left: 3px solid var(--amber);
  background: rgba(27, 39, 72, 0.55);
  color: var(--fg-dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 62em;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber), var(--celadon) 52%, var(--line-soft));
}

.page-about .about-stage {
  position: relative;
  padding-left: calc(var(--about-axis) + 22px);
  padding-bottom: clamp(22px, 3vw, 34px);
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: calc(var(--about-axis) - 6.5px);
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--amber);
  box-shadow: 0 0 0 0 rgba(245, 160, 60, 0.2);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  background: var(--amber);
  box-shadow: 0 0 0 7px rgba(245, 160, 60, 0.14);
}

.page-about .about-stage:nth-child(3)::before {
  border-color: var(--celadon);
}

.page-about .about-stage:nth-child(3):hover::before {
  background: var(--celadon);
  box-shadow: 0 0 0 7px rgba(79, 179, 160, 0.16);
}

.page-about .about-stage:nth-child(4)::before {
  border-color: var(--mark);
}

.page-about .about-stage:nth-child(4):hover::before {
  background: var(--mark);
  box-shadow: 0 0 0 7px rgba(255, 217, 160, 0.16);
}

.page-about .about-year {
  position: absolute;
  left: 0;
  top: 0;
  width: calc(var(--about-axis) - 14px);
  text-align: right;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--mark);
}

.page-about .about-stage-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 1.8vw, 23px);
  line-height: 1.3;
  color: var(--fg);
}

.page-about .about-stage-text {
  margin: 0;
  max-width: 40em;
  color: var(--fg-dim);
  font-size: 15px;
  line-height: 1.82;
}

/* ---------- 图片通用 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 3.4vw, 42px) 0 0;
}

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

.page-about .about-figure .figure-caption {
  color: var(--fg-dim);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.2vw, 42px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.page-about .about-team-body p {
  margin: 0 0 20px;
  max-width: 38em;
  color: var(--fg-dim);
  font-size: clamp(15.5px, 1.35vw, 17px);
  line-height: 1.85;
}

.page-about .about-team-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-team-list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fg);
}

.page-about .about-team-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .about-team-list li:nth-child(2) .about-team-num {
  color: var(--celadon);
}

.page-about .about-team-note {
  padding-left: 16px;
  border-left: 2px solid var(--line);
  color: var(--fg-dim) !important;
  font-size: 14.5px !important;
  line-height: 1.8 !important;
  margin-bottom: 0 !important;
}

.page-about .about-figure--team {
  margin-top: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.2vw, 42px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-eco-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  }
}

.page-about .about-figure--eco {
  margin-top: 0;
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(37, 51, 92, 0.6), rgba(10, 18, 41, 0.7));
  padding: clamp(14px, 2vw, 22px);
  clip-path: polygon(var(--cut-md) 0, 100% 0, 100% calc(100% - var(--cut-md)), calc(100% - var(--cut-md)) 100%, 0 100%, 0 var(--cut-md));
}

.page-about .about-eco-body p {
  margin: 0 0 18px;
  max-width: 38em;
  color: var(--fg-dim);
  font-size: clamp(15.5px, 1.35vw, 17px);
  line-height: 1.85;
}

.page-about .about-eco-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-eco-list li {
  position: relative;
  padding-left: 20px;
  color: var(--fg);
  font-size: 15px;
  line-height: 1.72;
}

.page-about .about-eco-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 10px;
  height: 2px;
  background: var(--celadon);
}

.page-about .about-eco-note {
  color: var(--fg-dim) !important;
  font-size: 14.5px !important;
  margin-bottom: 14px !important;
}

.page-about .about-eco-link {
  display: inline-flex;
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope-panel {
  position: relative;
  padding: clamp(22px, 3.2vw, 40px);
  background: linear-gradient(150deg, rgba(27, 39, 72, 0.92), rgba(10, 18, 41, 0.9));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--cut-lg)) 0, 100% var(--cut-lg), 100% 100%, 0 100%);
}

.page-about .about-scope-head {
  max-width: 52em;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-scope-head .about-sec-title {
  margin-bottom: 12px;
}

.page-about .about-scope-lead {
  margin: 0;
  color: var(--fg-dim);
  font-size: clamp(15.5px, 1.35vw, 17px);
  line-height: 1.85;
}

.page-about .about-scope-list {
  list-style: none;
  margin: 0 0 clamp(26px, 3.4vw, 40px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 720px) {
  .page-about .about-scope-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-scope-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-scope-list li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px clamp(14px, 1.8vw, 20px);
  background: var(--night);
}

.page-about .about-scope-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--celadon);
}

.page-about .about-scope-label {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--fg-dim);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 780px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-next-card {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 18px clamp(16px, 2vw, 22px) 20px;
  background: rgba(37, 51, 92, 0.62);
  border: 1px solid var(--line-soft);
  text-decoration: none;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-next-card:hover,
.page-about .about-next-card:focus-visible {
  background: rgba(48, 65, 112, 0.85);
  border-color: rgba(245, 160, 60, 0.5);
  transform: translateY(-3px);
}

.page-about .about-next-kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-next-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--fg);
}

.page-about .about-next-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-dim);
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-line::before,
  .page-about .about-stage::before,
  .page-about .about-next-card {
    transition: none;
  }

  .page-about .about-line:hover,
  .page-about .about-line:focus-visible,
  .page-about .about-next-card:hover,
  .page-about .about-next-card:focus-visible {
    transform: none;
  }
}
<<<END>>>