/* ===== 品牌使命与沿革 · 页面专属样式 ===== */
.page-about {
  --about-line-gold: rgba(201, 165, 82, 0.42);
  --about-line-gold-soft: rgba(201, 165, 82, 0.20);
  --about-ink-dim: rgba(246, 241, 230, 0.72);
  background: var(--pearl);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--navy-royal);
  color: var(--pearl);
  padding: calc(var(--header-h) + clamp(32px, 5vw, 72px)) 0 clamp(52px, 8vw, 104px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(48%, 580px);
  height: 100%;
  background:
    linear-gradient(155deg, rgba(14, 44, 74, 0.95) 0%, rgba(6, 26, 46, 0) 70%),
    repeating-linear-gradient(90deg, rgba(201, 165, 82, 0.10) 0 1px, transparent 1px 88px);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -34%;
  width: 62%;
  height: 66%;
  background: radial-gradient(circle at 42% 42%, rgba(201, 165, 82, 0.20), rgba(201, 165, 82, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb ol,
.page-about .about-hero .breadcrumb li {
  color: rgba(246, 241, 230, 0.62);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(246, 241, 230, 0.86);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--gold-light);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0.55em 0 0;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 54ch;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.82;
  color: rgba(246, 241, 230, 0.86);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line-gold);
  border: 1px solid var(--about-line-gold);
}

.page-about .fact {
  background: rgba(14, 44, 74, 0.78);
  padding: clamp(14px, 2vw, 20px);
}

.page-about .fact__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3vw, 1.875rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold-light);
  line-height: 1.1;
}

.page-about .fact__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--about-ink-dim);
}

/* ---------- 品牌自述 ---------- */
.page-about .about-self {
  position: relative;
  padding: clamp(52px, 7vw, 100px) 0;
}

.page-about .about-self__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-self__mark .index-num,
.page-about .about-self__mark .eyebrow {
  display: inline-block;
}

.page-about .about-self__prose h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--pearl);
  margin: 0 0 0.7em;
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  max-width: 64ch;
}

.page-about .about-head h2 {
  font-family: var(--serif);
  font-size: clamp(1.55rem, 3.2vw, 2.375rem);
  line-height: 1.26;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0.4em 0 0;
}

.page-about .tone-dark .about-head h2 {
  color: var(--pearl);
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--slate);
}

.page-about .tone-dark .about-head__lede {
  color: var(--about-ink-dim);
}

/* ---------- 发展脉络 ---------- */
.page-about .about-journey__figure {
  margin-top: clamp(30px, 4vw, 46px);
  margin-bottom: 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(36px, 5vw, 64px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--about-line-gold-soft) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 38px;
  padding-bottom: clamp(24px, 3vw, 38px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--pearl);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 165, 82, 0.14);
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--gold-light);
  box-shadow: 0 0 0 6px rgba(201, 165, 82, 0.20);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--mono);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-about .about-timeline__body h3 {
  font-family: var(--serif);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 三条服务主张 ---------- */
.page-about .principle-stack {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  margin-top: clamp(32px, 4vw, 50px);
}

.page-about .principle {
  border-top: 2px solid var(--gold);
}

.page-about .principle__num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--coral);
  border: 1px solid rgba(226, 114, 91, 0.5);
  padding: 2px 8px;
}

.page-about .principle__title {
  font-family: var(--serif);
  font-size: clamp(1.125rem, 2vw, 1.3125rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin: 16px 0 10px;
}

.page-about .principle__text {
  margin: 0 0 14px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .principle__more {
  border-top: 1px dashed var(--line);
}

/* ---------- 团队与能力 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(30px, 4vw, 46px);
}

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

.page-about .about-team__intro {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--about-ink-dim);
}

.page-about .about-team__bars {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  align-content: start;
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 14px;
  align-items: baseline;
}

.page-about .bar-row__label {
  font-size: 0.9375rem;
  color: rgba(246, 241, 230, 0.9);
}

.page-about .bar-row__val {
  font-family: var(--mono);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

.page-about .bar-row__track {
  grid-column: 1 / -1;
  display: block;
  height: 10px;
  background: rgba(246, 241, 230, 0.10);
  border: 1px solid var(--about-line-gold);
  overflow: hidden;
}

.page-about .bar-row__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-light) 100%);
  transition: width 0.5s var(--ease);
}

.page-about .bar-row__fill--a { width: 100%; }
.page-about .bar-row__fill--b { width: 82%; }
.page-about .bar-row__fill--c { width: 50%; }

.page-about .about-team__notes {
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
  margin-top: clamp(34px, 4vw, 52px);
}

.page-about .note-card {
  padding: clamp(18px, 2.4vw, 26px) 0 0;
  border-top: 1px solid var(--about-line-gold);
}

.page-about .note-card h3 {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--gold-light);
  margin: 0 0 10px;
}

.page-about .note-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-ink-dim);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-credentials__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

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

.page-about .cred-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  align-items: start;
  background: var(--pearl);
  padding: clamp(16px, 2.2vw, 22px) clamp(4px, 1vw, 10px);
}

.page-about .cred-item__num {
  font-family: var(--mono);
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.2;
  min-width: 3.6em;
}

.page-about .cred-item h3 {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
}

.page-about .cred-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-credentials__figure {
  margin: 0;
  border: 1px solid var(--about-line-gold);
  background: var(--navy-royal);
}

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

.page-about .about-credentials__figure figcaption {
  padding: 14px 18px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--about-ink-dim);
  background: var(--navy-court);
}

/* ---------- 服务网络 ---------- */
.page-about .net-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 4vw, 46px);
  background: var(--about-line-gold);
  border: 1px solid var(--about-line-gold);
}

.page-about .net-cell {
  background: var(--pearl);
  padding: clamp(18px, 2.6vw, 28px);
}

.page-about .net-cell__val {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--navy-court);
  line-height: 1.1;
}

.page-about .net-cell__label {
  display: block;
  margin-top: 10px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-network__detail {
  margin-top: clamp(28px, 3.6vw, 44px);
  max-width: 74ch;
}

.page-about .about-network__detail p {
  margin: 0 0 1.1em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-network__detail p:last-child {
  margin-bottom: 0;
}

.page-about .about-network__detail a {
  color: var(--index-blue);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.page-about .about-network__detail a:hover,
.page-about .about-network__detail a:focus-visible {
  color: var(--gold);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-cta__text h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--pearl);
  margin: 0.4em 0 0;
}

.page-about .about-cta__text p {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--about-ink-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .about-cta__back {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: rgba(246, 241, 230, 0.72);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-gold);
  padding-bottom: 2px;
}

.page-about .about-cta__back:hover,
.page-about .about-cta__back:focus-visible {
  color: var(--gold-light);
}

/* ---------- 图片容器基础保护 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-timeline::before {
    left: 96px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 32px;
    padding-left: 0;
  }

  .page-about .about-timeline__item::before {
    left: 96px;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item:hover::before {
    transform: translateX(-50%) scale(1.12);
  }

  .page-about .about-timeline__year {
    text-align: right;
    padding-right: 20px;
    margin-bottom: 0;
    padding-top: 3px;
  }

  .page-about .about-team__notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-credentials__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-about .about-self__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(28px, 5vw, 72px);
  }

  .page-about .about-self__mark {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }
}

@media (min-width: 980px) {
  .page-about .principle-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .principle:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .principle:nth-child(3) {
    margin-top: 68px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .about-hero__facts {
    margin-bottom: 6px;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(34px, 4vw, 56px);
  }

  .page-about .net-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero::before {
    width: min(44%, 640px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__item:hover::before,
  .page-about .bar-row__fill {
    transition: none;
  }

  .page-about .about-timeline__item:hover::before {
    transform: translateX(0);
  }
}

@media (min-width: 768px) and (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__item:hover::before {
    transform: translateX(-50%);
  }
}