/* ===== 关于品牌页专属样式 ===== */
.page-about {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
}
.page-about .breadcrumbs {
  margin: 18px 20px 0;
}

/* ===== 首屏品牌叙事 ===== */
.page-about__hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 68%, #00A870 100%);
  color: #fff;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}
.page-about__hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -28%;
  width: 65%;
  height: 70%;
  background: rgba(255, 212, 0, .08);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about__hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 44px 20px 48px;
  display: grid;
  gap: 32px;
}
.page-about__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.page-about__eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--color-accent);
}
.page-about__title {
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #fff;
}
.page-about__title-sub {
  display: block;
  margin-top: 12px;
  font-size: clamp(1.05rem, 2.6vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--color-accent);
}
.page-about__lead {
  max-width: 620px;
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .88);
}
.page-about__hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .22);
}
.page-about__stat-num {
  display: block;
  font-size: clamp(1.3rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}
.page-about__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .72);
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about__hero-media {
  position: relative;
}
.page-about__hero-media::before {
  content: "";
  position: absolute;
  left: -12px;
  top: -12px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-accent);
  pointer-events: none;
}
.page-about__hero-media img {
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .22);
}
.page-about__hero .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, .72);
  background: transparent;
}
.page-about__hero .btn--ghost:hover {
  background: rgba(255, 255, 255, .12);
}

/* ===== 本页目录与主体布局 ===== */
.page-about__layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.page-about__rail {
  padding: 28px 0 4px;
}
.page-about__rail-label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.page-about__rail-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}
.page-about__rail-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-ink);
  background: #fff;
  border: 1px solid var(--color-line);
  padding: 8px 12px;
}
.page-about__rail-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.page-about__rail-no {
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  padding: 3px 5px;
  color: var(--color-accent);
  background: var(--color-primary);
}
.page-about__rail-note {
  display: none;
}
.page-about__content {
  min-width: 0;
}

/* ===== 章节通用 ===== */
.page-about__section {
  padding: 48px 0;
}
.page-about__section + .page-about__section {
  border-top: 2px solid var(--color-line);
}
.page-about__section--data + .page-about__section {
  border-top: none;
}
.page-about__section-no {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
  color: var(--color-primary);
  background: rgba(0, 135, 90, .08);
}
.page-about__section-title {
  margin: 0 0 22px;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

/* ===== 01 我们是谁 ===== */
.page-about__section--who {
  margin-top: 28px;
}
.page-about__who-grid {
  display: grid;
  gap: 28px;
}
.page-about__prose p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(26, 46, 40, .86);
}
.page-about__prose p:last-child {
  margin-bottom: 0;
}
.page-about__who-points {
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-about__point {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  background: var(--color-primary-soft);
  padding: 16px;
}
.page-about__point-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 14px;
  font-weight: 900;
  color: var(--color-primary);
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, 78% 100%, 0 100%);
}
.page-about__point strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 800;
}
.page-about__point p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(26, 46, 40, .78);
}

/* ===== 02 内容如何组织 ===== */
.page-about__section--organize {
  background: var(--color-primary-soft);
}
.page-about__organize-grid {
  display: grid;
  gap: 28px;
}
.page-about__organize-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}
.page-about__organize-item {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: var(--color-paper);
  border-left: 4px solid var(--color-primary);
}
.page-about__organize-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.page-about__organize-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}
.page-about__organize-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(26, 46, 40, .78);
}
.page-about__organize-media img {
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 12px 32px rgba(26, 46, 40, .12);
}

/* ===== 03 数据来源与三层校对 ===== */
.page-about__section--data {
  border-top: none !important;
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: 44px 22px 48px;
}
.page-about__section--data .page-about__section-title {
  color: #fff;
}
.page-about__section--data .page-about__section-no {
  color: var(--color-accent);
  background: rgba(255, 212, 0, .12);
}
.page-about__data-grid {
  display: grid;
  gap: 28px;
}
.page-about__section--data .prose p {
  color: rgba(255, 255, 255, .86);
}
.page-about__data-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}
.page-about__chip {
  display: inline-block;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .32);
}
.page-about__data-note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 3px solid var(--color-accent);
}
.page-about__data-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .72);
}
.page-about__data-media {
  display: grid;
  gap: 20px;
}
.page-about__data-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(255, 255, 255, .28);
}
.page-about__flow-svg {
  display: block;
  width: 100%;
  height: auto;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .18);
}
.page-about__flow-line {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-dasharray: 6 5;
  stroke-linecap: butt;
}
.page-about__flow-dot {
  fill: var(--color-accent);
}
.page-about__flow-text {
  fill: rgba(255, 255, 255, .9);
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-body);
}

/* ===== 04 发展里程碑 ===== */
.page-about__milestones-intro {
  max-width: 560px;
  margin: -10px 0 28px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(26, 46, 40, .72);
}
.page-about__timeline {
  position: relative;
  padding-left: 30px;
}
.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--color-line);
}
.page-about__milestone {
  position: relative;
  margin-bottom: 26px;
}
.page-about__milestone-dot {
  position: absolute;
  left: -30px;
  top: 10px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-primary);
  transform: rotate(45deg);
}
.page-about__milestone-body {
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  padding: 14px 16px;
}
.page-about__milestone-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0;
  font-size: 16px;
  font-weight: 800;
  text-align: left;
  color: var(--color-ink);
  background: none;
  border: 0;
  cursor: pointer;
  font-family: inherit;
}
.page-about__milestone-trigger::after {
  content: "+";
  font-size: 18px;
  font-weight: 900;
  flex-shrink: 0;
  color: var(--color-primary);
}
.page-about__milestone-trigger[aria-expanded="true"]::after {
  content: "–";
}
.page-about__milestone-trigger:hover {
  color: var(--color-primary);
}
.page-about__milestone-panel {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-line);
}
.page-about__milestone-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(26, 46, 40, .8);
}

/* ===== 05 服务边界 ===== */
.page-about__boundary-grid {
  display: grid;
  gap: 20px;
}
.page-about__boundary-col {
  padding: 22px 20px;
}
.page-about__boundary-col h3 {
  margin: 0 0 16px;
  padding-bottom: 10px;
  font-size: 18px;
  font-weight: 900;
  border-bottom: 2px solid;
}
.page-about__boundary-col ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about__boundary-col li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.6;
}
.page-about__boundary-col--offer {
  background: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
}
.page-about__boundary-col--offer h3 {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.page-about__boundary-col--offer li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-weight: 900;
  color: var(--color-primary);
}
.page-about__boundary-col--limit {
  background: var(--color-orange-soft);
  border-left: 4px solid var(--color-orange);
}
.page-about__boundary-col--limit h3 {
  color: var(--color-orange);
  border-color: var(--color-orange);
}
.page-about__boundary-col--limit li::before {
  content: "✕";
  position: absolute;
  left: 0;
  font-weight: 900;
  color: var(--color-orange);
}
.page-about__trustnote {
  display: grid;
  gap: 18px;
  margin-top: 32px;
  padding: 22px 20px;
  background: var(--color-primary-deep);
  color: #fff;
}
.page-about__trustnote p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .85);
}
.page-about__trustnote-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about__trustnote .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, .72);
  background: transparent;
}
.page-about__trustnote .btn--ghost:hover {
  background: rgba(255, 255, 255, .12);
}

/* ===== 中屏：板块自适应 ===== */
@media (min-width: 640px) {
  .page-about__organize-list {
    grid-template-columns: 1fr 1fr;
  }
  .page-about__data-media {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .page-about__boundary-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .page-about__trustnote {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 24px;
  }
}

/* ===== 桌面：左右分置导航与分屏首屏 ===== */
@media (min-width: 920px) {
  .page-about__hero-inner {
    grid-template-columns: 1.05fr .95fr;
    align-items: center;
    gap: 48px;
    padding: 72px 40px 72px;
  }
  .page-about__who-grid {
    grid-template-columns: 1.1fr .9fr;
    align-items: start;
    gap: 40px;
  }
  .page-about__organize-grid {
    grid-template-columns: 1fr .9fr;
    align-items: start;
    gap: 40px;
  }
  .page-about__data-grid {
    grid-template-columns: 1.05fr .95fr;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 980px) {
  .page-about__layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    padding: 40px 40px 0;
  }
  .page-about__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 4px 0 4px 18px;
    border-left: 3px solid var(--color-primary);
  }
  .page-about__rail-nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about__rail-link {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-line);
    padding: 10px 0;
  }
  .page-about__rail-link:hover {
    border-bottom-color: var(--color-primary);
  }
  .page-about__rail-note {
    display: block;
    margin-top: 20px;
    padding: 14px;
    font-size: 13px;
    line-height: 1.6;
    background: var(--color-primary-soft);
  }
  .page-about__rail-note p:first-child {
    margin-bottom: 6px;
    font-weight: 800;
    color: var(--color-primary);
  }
  .page-about__section {
    padding: 72px 0;
  }
  .page-about__section--data {
    padding: 56px 36px;
  }
  .page-about__section--who {
    margin-top: 36px;
  }
}