/* ===== 品牌概况页专属样式 ===== */
.page-about {
  --timeline-dot-size: 14px;
  --timeline-line-width: 2px;
  --honor-min-height: 230px;
  background: var(--white);
  color: var(--dark);
}

/* ---- 首屏杂志封面式标题区 ---- */
.page-about .page-hero {
  padding: var(--space-4) 0 var(--space-6);
  border-bottom: 2px solid var(--silver);
  position: relative;
  margin-bottom: var(--space-2);
}

.page-about .page-hero__meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
}

.page-about .page-hero__note {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--silver);
  white-space: nowrap;
  margin-left: var(--space-2);
}

.page-about .page-hero__title {
  margin-top: var(--space-4);
  margin-bottom: var(--space-3);
  font-size: var(--text-hero);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .page-hero__title em {
  display: block;
  font-style: italic;
  font-size: 0.58em;
  color: var(--red);
  margin-top: 0.15em;
  letter-spacing: 0.01em;
}

.page-about .page-hero__lead {
  max-width: 56ch;
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.65;
}

.page-about .page-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-about .page-hero__tags a {
  text-decoration: none;
}

/* ---- 01 品牌简介 ---- */
.page-about .about-intro {
  padding: var(--space-6) 0;
}

.page-about .about-intro__grid {
  display: grid;
  gap: var(--space-5);
}

.page-about .about-intro__lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  margin: var(--space-3) 0;
}

.page-about .about-intro__content p {
  line-height: 1.75;
  margin: var(--space-2) 0;
}

.page-about .about-intro__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--silver);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
}

.page-about .about-stat__num {
  font-family: var(--font-heading);
  font-size: var(--text-xxl);
  font-weight: 900;
  line-height: 1;
  color: var(--deep-blue);
}

.page-about .about-stat__num::after {
  content: "·";
  color: var(--red);
  margin-left: 2px;
}

.page-about .about-stat__label {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  margin-top: var(--space-1);
}

.page-about .about-intro__visual {
  position: relative;
}

.page-about .about-intro__visual::after {
  content: "EST.2008";
  position: absolute;
  right: 8px;
  top: 8px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  padding: 6px 10px;
  letter-spacing: 0.08em;
}

.page-about .about-intro__visual img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--silver);
  border-radius: var(--radius);
}

/* ---- 02 发展里程碑 ---- */
.page-about .about-milestones {
  background: var(--light-gray);
  padding: var(--space-6) 0;
}

.page-about .about-milestones__header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-3);
}

.page-about .about-milestones__header .section__lead {
  max-width: 34ch;
  margin: 0;
}

.page-about .about-milestones__visual {
  margin: var(--space-5) 0;
  position: relative;
}

.page-about .about-milestones__visual img {
  width: 100%;
  height: auto;
  display: block;
  border-left: 4px solid var(--red);
}

.page-about .about-milestones__caption {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

.page-about .about-timeline {
  border-top: 1px solid var(--silver);
  padding-top: var(--space-4);
  display: grid;
  gap: var(--space-3);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: calc(24px + var(--space-2));
  padding-bottom: var(--space-3);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: var(--timeline-line-width);
  background: var(--silver);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 0.5em;
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.16);
  z-index: 1;
}

.page-about .about-timeline__head {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}

.page-about .about-timeline__head::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__year {
  font-family: var(--font-data);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--red);
  font-weight: 700;
}

.page-about .about-timeline__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 900;
  color: var(--deep-blue);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__marker::after {
  content: "＋";
  font-size: var(--text-sm);
  color: var(--silver);
  margin-left: var(--space-1);
}

.page-about .about-timeline__item[open] .about-timeline__marker::after {
  content: "－";
  color: var(--red);
}

.page-about .about-timeline__body {
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid var(--red);
  background: var(--white);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-timeline__body p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ---- 03 团队与组织 ---- */
.page-about .about-team {
  padding: var(--space-6) 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

.page-about .about-team__chart {
  position: relative;
  width: min(280px, 100%);
  margin-inline: auto;
}

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

.page-about .about-team__chart circle {
  transition: stroke-width var(--transition), stroke var(--transition);
  cursor: help;
  outline: none;
}

.page-about .about-team__chart circle:hover,
.page-about .about-team__chart circle:focus-visible {
  stroke-width: 20;
}

.page-about .about-team__ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.page-about .about-team__ring-num {
  font-family: var(--font-heading);
  font-size: var(--text-xxl);
  font-weight: 900;
  color: var(--deep-blue);
  line-height: 1;
}

.page-about .about-team__ring-label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.page-about .about-team__lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  margin: var(--space-3) 0 0;
}

.page-about .about-team__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-team__list-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  background: var(--light-gray);
  padding: var(--space-2);
  border-radius: var(--radius);
  border-left: 3px solid var(--red);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.page-about .about-team__list-item strong {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--red);
}

.page-about .about-team__list-desc {
  flex: 1 1 180px;
}

.page-about .about-team__media {
  margin-top: var(--space-4);
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
}

/* ---- 04 技术能力 ---- */
.page-about .about-tech {
  background: var(--deep-blue);
  color: var(--white);
  padding: var(--space-6) 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-tech::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-about .about-tech .section__title {
  color: var(--white);
  position: relative;
}

.page-about .about-tech .section__lead {
  color: rgba(255,255,255,0.7);
  position: relative;
}

.page-about .about-tech__grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
  position: relative;
}

.page-about .about-tech__icon {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--red);
}

.page-about .about-tech__card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-left: 4px solid var(--red);
  padding: var(--space-4);
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.page-about .about-tech__card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(212,175,55,0.6);
  transform: translateY(-2px);
}

.page-about .about-tech__card h3 {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 var(--space-1);
}

.page-about .about-tech__card p {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin: 0;
}

/* ---- 05 荣誉与认可 ---- */
.page-about .about-honors {
  background: var(--light-gray);
  padding: var(--space-6) 0;
}

.page-about .about-honors__grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.page-about .about-honor {
  perspective: 900px;
  outline: none;
  min-height: var(--honor-min-height);
}

.page-about .about-honor__inner {
  position: relative;
  width: 100%;
  min-height: var(--honor-min-height);
  transform-style: preserve-3d;
  transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
}

.page-about .about-honor:hover .about-honor__inner,
.page-about .about-honor:focus-visible .about-honor__inner,
.page-about .about-honor:focus-within .about-honor__inner {
  transform: rotateY(180deg);
}

.page-about .about-honor__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--silver);
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .about-honor__face--back {
  transform: rotateY(180deg);
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--white);
}

.page-about .about-honor__num {
  font-family: var(--font-data);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-honor__face h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 900;
  color: var(--dark);
  margin: var(--space-2) 0 var(--space-1);
}

.page-about .about-honor__face--back h3 {
  color: var(--white);
}

.page-about .about-honor__hint {
  font-size: var(--text-xs);
  color: var(--silver);
  margin: 0;
}

.page-about .about-honor__face--back p {
  color: rgba(255,255,255,0.85);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin: 0 0 var(--space-2);
}

/* ---- 底部行动区 ---- */
.page-about .about-cta {
  background: var(--deep-blue);
  padding: var(--space-6) 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(230,57,70,0.35) 0%, transparent 70%);
}

.page-about .about-cta__inner {
  display: grid;
  gap: var(--space-3);
  justify-items: center;
  text-align: center;
  position: relative;
}

.page-about .about-cta h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xxl);
  font-weight: 900;
  color: var(--white);
  margin: 0;
}

.page-about .about-cta p {
  color: rgba(255,255,255,0.75);
  max-width: 54ch;
  margin: 0;
  line-height: 1.7;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-3);
}

.page-about .about-cta__link {
  color: var(--gold);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  color: var(--white);
  border-color: var(--white);
}

/* ---- 响应式布局 ---- */
@media (min-width: 768px) {
  .page-about .about-intro__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-tech__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1024px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--space-6);
  }

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