.page-about {
  --about-gold-glow: rgba(201, 169, 106, 0.16);
  --about-purple-glow: rgba(184, 58, 200, 0.1);
  --about-gold-line: rgba(201, 169, 106, 0.38);
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(104px, 14vw, 180px) 0 clamp(56px, 8vw, 96px);
  background:
    radial-gradient(800px 360px at 82% 8%, var(--about-gold-glow), transparent 60%),
    radial-gradient(600px 300px at 4% 100%, var(--about-purple-glow), transparent 50%),
    linear-gradient(135deg, #051020 0%, #0A1F3D 56%, #163A69 100%);
  overflow: hidden;
  border-bottom: 2px solid var(--about-gold-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(38, 69, 110, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 69, 110, 0.28) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(85% 90% at 60% 20%, #000 40%, transparent 100%);
  mask-image: radial-gradient(85% 90% at 60% 20%, #000 40%, transparent 100%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero__content {
  max-width: 640px;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--color-gold);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-heading);
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-hero__title {
    background: linear-gradient(115deg, #F0F4FA 25%, var(--color-gold-bright) 90%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.page-about .about-hero__lead {
  max-width: 560px;
  margin: 0 0 34px;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.75;
  color: var(--color-text-secondary);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .about-hero__visual {
  position: relative;
  border: 2px solid var(--about-gold-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 18px 18px 0 rgba(0, 0, 0, 0.35);
  margin: 0;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-btn-outline {
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold-bright);
}

.page-about .about-btn-outline:hover {
  background: rgba(201, 169, 106, 0.12);
  border-color: var(--color-gold-bright);
  color: #fff;
}

/* ---------- /01 品牌缘起 ---------- */
.page-about .about-origin {
  padding: clamp(64px, 10vw, 120px) 0;
  position: relative;
}

.page-about .about-origin::after {
  content: "";
  display: block;
  width: 160px;
  height: 2px;
  margin: clamp(40px, 6vw, 56px) auto 0;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  opacity: 0.5;
}

.page-about .about-origin__inner {
  max-width: 760px;
  margin: 0 auto;
}

.page-about .about-origin__lead {
  font-family: var(--font-heading);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--color-text-primary);
  margin: clamp(24px, 4vw, 40px) 0 20px;
}

.page-about .about-origin .prose {
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-origin .prose p + p {
  margin-top: 14px;
}

.page-about .about-origin .prose strong {
  color: var(--color-text-primary);
}

.page-about .about-origin__quote {
  margin: 36px 0 0;
  padding: 18px 24px;
  border-left: 3px solid var(--color-gold);
  background: linear-gradient(90deg, rgba(201, 169, 106, 0.08), transparent);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-gold-bright);
}

/* ---------- /02 发展历程 ---------- */
.page-about .about-milestones {
  position: relative;
  padding: clamp(64px, 10vw, 120px) 0;
  background: linear-gradient(180deg, rgba(5, 16, 32, 0.4), rgba(10, 31, 61, 0.25));
}

.page-about .about-section-intro {
  color: var(--color-text-secondary);
  font-size: 15.5px;
  line-height: 1.7;
  max-width: 560px;
  margin-top: 14px;
}

.page-about .about-milestones .about-section-intro {
  margin-bottom: 0;
}

.page-about .about-timeline {
  position: relative;
  margin-top: clamp(40px, 6vw, 56px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    rgba(201, 169, 106, 0.08),
    rgba(201, 169, 106, 0.65) 30%,
    rgba(201, 169, 106, 0.65) 70%,
    rgba(201, 169, 106, 0.08)
  );
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 52px 36px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-gold);
  background: var(--color-royal-blue-dark);
  z-index: 1;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--color-gold);
  margin-bottom: 14px;
}

.page-about .about-timeline__year-num {
  font-size: 24px;
  font-weight: 600;
}

.page-about .about-timeline__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-hard);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-timeline__card:hover {
  border-color: rgba(201, 169, 106, 0.55);
  transform: translateY(-2px);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-gold-bright);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-about .about-milestones__map {
  margin: 56px auto 0;
  max-width: 900px;
}

.page-about .about-milestones__map img {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  object-fit: cover;
}

.page-about .about-milestones__map figcaption {
  margin-top: 14px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

/* ---------- /03 服务范围 ---------- */
.page-about .about-services {
  padding: clamp(64px, 10vw, 120px) 0;
  position: relative;
  background:
    radial-gradient(720px 360px at 12% 100%, var(--about-purple-glow), transparent 60%),
    radial-gradient(600px 320px at 90% 10%, var(--about-gold-glow), transparent 55%);
}

.page-about .about-services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: clamp(40px, 6vw, 56px);
}

.page-about .about-service-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 30px 28px;
  box-shadow: var(--shadow-hard);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 169, 106, 0.55);
  box-shadow: 20px 20px 0 rgba(0, 0, 0, 0.35);
}

.page-about .about-service-card--primary {
  border-top: 3px solid var(--color-gold);
}

.page-about .about-service-card__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-gold-bright);
  margin-bottom: 18px;
}

.page-about .about-service-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
  color: var(--color-text-primary);
}

.page-about .about-service-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-secondary);
}

.page-about .about-service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-about .about-service-card__link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-gold-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 169, 106, 0.4);
  padding-bottom: 2px;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.page-about .about-service-card__link:hover {
  border-color: var(--color-gold-bright);
  color: #fff;
}

.page-about .about-services__figure {
  margin: 56px auto 0;
  max-width: 860px;
}

.page-about .about-services__figure img {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  object-fit: cover;
}

/* ---------- /04 透明化举措 ---------- */
.page-about .about-transparency {
  padding: clamp(64px, 9vw, 110px) 0;
  background:
    radial-gradient(700px 300px at 80% 0%, var(--about-gold-glow), transparent 60%),
    linear-gradient(180deg, rgba(5, 16, 32, 0.6), rgba(10, 31, 61, 0.75)),
    var(--color-royal-blue-dark);
  border-top: 2px solid var(--about-gold-line);
  border-bottom: 2px solid var(--about-gold-line);
}

.page-about .about-transparency__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: clamp(40px, 6vw, 56px) auto 0;
  max-width: 1080px;
}

.page-about .about-transparency-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(17, 32, 54, 0.6);
  padding: 28px;
  transition: transform 0.35s ease, border-color 0.35s ease;
}

.page-about .about-transparency-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-gold);
}

.page-about .about-transparency-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-gold);
  border-radius: 50%;
  color: var(--color-gold);
  font-size: 18px;
  margin-bottom: 18px;
}

.page-about .about-transparency-item h3 {
  margin: 0 0 10px;
  font-size: 19px;
  color: var(--color-text-primary);
}

.page-about .about-transparency-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ---------- /05 认证与资质 ---------- */
.page-about .about-certification {
  padding: clamp(64px, 9vw, 110px) 0;
}

.page-about .about-certification__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: clamp(40px, 6vw, 56px);
}

.page-about .about-cert-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: 30px 28px;
  box-shadow: var(--shadow-hard);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-cert-item:hover {
  border-color: var(--color-gold);
  transform: translateY(-3px);
}

.page-about .about-cert-item__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  height: 56px;
  padding: 0 14px;
  border: 2px solid var(--color-gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gold-bright);
  background: rgba(201, 169, 106, 0.08);
  margin-bottom: 16px;
}

.page-about .about-cert-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--color-text-primary);
}

.page-about .about-cert-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ---------- /06 数据与规模 ---------- */
.page-about .about-stats {
  padding: clamp(72px, 10vw, 120px) 0;
  background: radial-gradient(760px 380px at 50% 20%, var(--about-gold-glow), transparent 60%);
  border-top: 1px solid var(--about-gold-line);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: clamp(40px, 6vw, 56px);
}

.page-about .about-stat {
  padding: 30px 16px;
  text-align: center;
  background: linear-gradient(180deg, rgba(17, 32, 54, 0.9), rgba(10, 31, 61, 0.6));
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-stat:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 169, 106, 0.6);
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-gold-bright);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}

.page-about .about-stats__note {
  margin: 28px 0 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding: clamp(64px, 9vw, 100px) 0;
}

.page-about .about-cta__inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  border: 2px solid var(--about-gold-line);
  border-radius: var(--radius);
  padding: 44px 28px;
  background:
    radial-gradient(400px 200px at 50% 0%, var(--about-gold-glow), transparent 70%),
    rgba(17, 32, 54, 0.6);
}

.page-about .about-cta__inner h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 4vw, 36px);
  color: var(--color-text-primary);
}

.page-about .about-cta__inner p {
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

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

/* ---------- 平板端 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .about-timeline {
    padding: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 64px;
    padding: 0 0 36px;
  }

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

  .page-about .about-timeline__item::before {
    left: calc(50% - 6px);
    top: 12px;
  }

  .page-about .about-timeline__year {
    margin: 0;
    padding-top: 14px;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    grid-column: 2;
    grid-row: 1;
    text-align: left;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 1;
    grid-row: 1;
  }

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

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

  .page-about .about-stats__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 140px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 72px;
  }

  .page-about .about-hero__visual {
    transform: rotate(2deg);
  }

  .page-about .about-hero__img {
    height: 540px;
  }

  .page-about .about-spectrum {
    display: block;
  }

  .page-about .about-services__grid {
    grid-template-columns: 1.15fr 0.85fr;
    grid-template-areas:
      "download verify"
      "download events";
    align-items: stretch;
  }

  .page-about .about-service-card--primary {
    grid-area: download;
  }

  .page-about .about-service-card:nth-child(2) {
    grid-area: verify;
  }

  .page-about .about-service-card:nth-child(3) {
    grid-area: events;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about .about-stat {
    padding: 36px 12px;
  }
}