/* ===== 品牌概况 · 页面专属样式（page-about） ===== */
.page-about {
  --about-accent: #FF6B00;
  --about-data: #39FF14;
  --about-bg-card: #071223;
  --about-border: rgba(192, 192, 192, 0.22);
  --about-skew: -5deg;
  overflow-x: hidden;
  overflow-x: clip;
  background-color: var(--color-bg-primary);
  color: var(--color-text);
}

.page-about .breadcrumbs {
  padding-top: 22px;
}

/* ---- 页头：无 Hero，直接进入品牌档案与目录 ---- */
.page-about .about-masthead {
  position: relative;
  padding: 48px 0 72px;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse at 85% 20%, rgba(255, 107, 0, 0.16), transparent 55%),
    radial-gradient(ellipse at 10% 90%, rgba(57, 255, 20, 0.08), transparent 50%),
    linear-gradient(135deg, #0B1E3A 0%, #1A3A6B 100%);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.7;
  background-image:
    radial-gradient(circle, rgba(57, 255, 20, 0.65) 0 2px, transparent 2.5px),
    radial-gradient(circle, rgba(255, 107, 0, 0.5) 0 1.5px, transparent 2px),
    radial-gradient(circle, rgba(192, 192, 192, 0.35) 0 1px, transparent 1.5px);
  background-size: 140px 140px, 190px 190px, 260px 260px;
  background-position: 20px 30px, 90px 80px, 0 0;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 46%;
  pointer-events: none;
  background: repeating-linear-gradient(-55deg, rgba(255, 107, 0, 0.28) 0 2px, transparent 2px 22px);
  clip-path: polygon(14% 0, 100% 0, 100% 100%, 0 100%);
}

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

.page-about .about-masthead h1 {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 2px;
  transform: skewX(var(--about-skew));
}

.page-about .about-masthead .page-lead {
  max-width: 680px;
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-accent);
}

.page-about .about-eyebrow::before {
  content: "";
  width: 34px;
  height: 3px;
  background: var(--about-data);
  transform: skewX(var(--about-skew));
}

.page-about .about-masthead-rule {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 7px;
  background: var(--about-accent);
  clip-path: polygon(0 0, 100% 0, calc(100% - 48px) 100%, 0 100%);
}

.page-about .about-masthead-rule::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 36%;
  background: var(--about-data);
  clip-path: polygon(6% 0, 100% 0, 100% 100%, 0 100%);
}

/* ---- 目录卡片：编辑部目录隐喻 ---- */
.page-about .about-index {
  margin-top: 34px;
  padding: 22px 24px;
  background: rgba(5, 13, 24, 0.6);
  border: 1px solid var(--about-border);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .about-index-label {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--about-data);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 640px) {
  .page-about .about-index ol {
    grid-template-columns: repeat(5, 1fr);
  }
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--speed-fast) var(--ease), color var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease);
}

.page-about .about-index a:hover {
  background: var(--about-accent);
  border-color: var(--about-accent);
  color: #071223;
}

.page-about .about-index a span {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--about-accent);
}

.page-about .about-index a:hover span {
  color: #071223;
}

.page-about .about-masthead-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

/* ---- 章节基础：纵向长卷，色带推进 ---- */
.page-about .about-section {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 12px);
  padding: 92px 0;
}

.page-about .about-section + .about-section::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--about-accent) 0%, var(--about-data) 55%, transparent 100%);
  opacity: 0.85;
}

.page-about .section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.page-about .section-heading-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 14px;
  background: var(--about-accent);
  color: #071223;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: 0.02em;
  transform: skewX(var(--about-skew));
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.page-about .section-heading-title {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 1px;
  transform: skewX(var(--about-skew));
}

.page-about .about-section-lead {
  max-width: 640px;
  margin: 0 0 48px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* ---- 01 品牌简介 ---- */
.page-about .about-brand-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-brand-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.page-about .about-brand-copy {
  border-left: 3px solid var(--about-accent);
  padding-left: 24px;
  font-size: 1.0625rem;
  line-height: 1.75;
}

.page-about .about-brand-copy p + p {
  margin-top: 18px;
}

.page-about .about-brand-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 24px 24px 26px 32px;
  background: rgba(7, 18, 35, 0.72);
  border-left: 4px solid var(--about-accent);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-brand-facts li {
  position: relative;
  padding-left: 28px;
  font-weight: 600;
}

.page-about .about-brand-facts li + li {
  margin-top: 14px;
}

.page-about .about-brand-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 12px;
  height: 12px;
  background: var(--about-data);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.45);
  transform: rotate(45deg) skewX(-8deg);
}

.page-about .about-brand-figure {
  margin: 0;
  padding: 10px;
  background: var(--color-bg-deep);
  border: 1px solid var(--about-border);
  box-shadow: var(--shadow-card);
  transform: rotate(-1.5deg);
}

.page-about .about-brand-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-brand-figure figcaption {
  padding: 12px 8px 6px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ---- 数据带 ---- */
.page-about .about-stats-band {
  position: relative;
  margin-top: 72px;
  padding: 40px 0;
  background:
    linear-gradient(90deg, rgba(255, 107, 0, 0.14), transparent 35%),
    var(--color-bg-deep);
  border-top: 1px solid var(--about-border);
  border-bottom: 1px solid var(--about-border);
}

.page-about .about-stats-band::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  background: linear-gradient(to bottom, var(--about-accent), var(--about-data));
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 20px;
}

@media (min-width: 860px) {
  .page-about .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-stat-value {
  font-family: var(--font-data);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--about-data);
}

.page-about .about-stat-value em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--about-accent);
}

.page-about .about-stat-label {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ---- 02 发展历程 ---- */
.page-about .about-timeline-section {
  background:
    radial-gradient(ellipse at 15% 10%, rgba(255, 107, 0, 0.12), transparent 48%),
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg-primary));
}

.page-about .about-timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

@media (min-width: 960px) {
  .page-about .about-timeline-layout {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
  }
}

.page-about .about-timeline-figure {
  position: relative;
  margin: 0;
}

.page-about .about-timeline-figure::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 14px -14px -14px 14px;
  background: repeating-linear-gradient(-55deg, rgba(255, 107, 0, 0.35) 0 2px, transparent 2px 16px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-timeline-figure img,
.page-about .about-timeline-figure figcaption {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  border: 1px solid var(--about-border);
  box-shadow: var(--shadow-card);
  transform: rotate(-0.8deg);
}

.page-about .about-timeline-figure figcaption {
  padding: 10px 4px 0;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-accent), var(--about-data), transparent);
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: 20px;
  padding-left: 40px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 18px;
  width: 16px;
  height: 16px;
  background: var(--color-bg-deep);
  border: 3px solid var(--about-accent);
  transform: rotate(45deg);
  transition: background var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease), box-shadow var(--speed-fast) var(--ease);
}

.page-about .timeline-item:has(details[open])::before {
  background: var(--about-data);
  border-color: var(--about-data);
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.45);
}

.page-about .timeline-item details {
  background: rgba(7, 18, 35, 0.72);
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--about-accent);
  transition: border-color var(--speed-fast) var(--ease), background var(--speed-fast) var(--ease);
}

.page-about .timeline-item details:hover {
  border-color: rgba(255, 107, 0, 0.6);
  background: rgba(18, 42, 80, 0.55);
}

.page-about .timeline-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline-item summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--about-accent);
  transition: transform var(--speed-base) var(--ease);
}

.page-about .timeline-item details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-about .timeline-item time {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--about-data);
}

.page-about .timeline-item summary strong {
  font-size: 0.98rem;
  line-height: 1.35;
}

.page-about .timeline-item details p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ---- 03 专业团队 ---- */
.page-about .about-team-section {
  background:
    linear-gradient(120deg, rgba(255, 107, 0, 0.08), transparent 55%),
    var(--color-bg-primary);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 860px) {
  .page-about .about-team-grid {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

.page-about .about-team-figure {
  position: relative;
  margin: 0;
  transform: rotate(1.2deg);
}

.page-about .about-team-figure::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 12px -12px -12px 12px;
  border: 2px solid rgba(255, 107, 0, 0.5);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-team-figure img,
.page-about .about-team-figure figcaption {
  position: relative;
  z-index: 1;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--about-border);
}

.page-about .about-team-figure figcaption {
  padding: 10px 4px 0;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.page-about .about-team-copy {
  font-size: 1.0625rem;
  line-height: 1.75;
}

.page-about .about-team-copy p + p {
  margin-top: 18px;
}

.page-about .about-team-roles {
  list-style: none;
  margin: 26px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .page-about .about-team-roles {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .about-team-role {
  background: var(--color-bg-card);
  border: 1px solid var(--about-border);
  padding: 14px 10px;
  text-align: center;
  transform: skewX(var(--about-skew));
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  box-shadow: 4px 4px 0 rgba(255, 107, 0, 0.35);
}

.page-about .about-team-role span {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  transform: skewX(calc(var(--about-skew) * -1));
}

.page-about .about-team-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 44px;
}

.page-about .about-team-skills span {
  padding: 8px 16px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: rgba(7, 18, 35, 0.6);
  border: 1px solid var(--about-border);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 100%, 14px 100%);
}

.page-about .about-team-skills span::before {
  content: "▸ ";
  color: var(--about-accent);
}

/* ---- 04 资质与认证 ---- */
.page-about .about-cert-section {
  background:
    radial-gradient(ellipse at 80% 30%, rgba(57, 255, 20, 0.08), transparent 45%),
    var(--color-bg-deep);
}

.page-about .about-cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 720px) {
  .page-about .about-cert-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .about-cert-card {
  position: relative;
  padding: 40px 28px 32px;
  overflow: hidden;
  background: linear-gradient(160deg, var(--color-bg-card), rgba(18, 42, 80, 0.5));
  border: 1px solid var(--about-border);
  transition: transform var(--speed-base) var(--ease), box-shadow var(--speed-base) var(--ease);
}

.page-about .about-cert-card:hover {
  transform: translateY(-6px) rotate(-0.6deg);
  box-shadow: var(--shadow-card);
}

.page-about .about-cert-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--about-accent), var(--about-data));
  transform: scaleX(0.2);
  transform-origin: left;
  transition: transform var(--speed-base) var(--ease);
}

.page-about .about-cert-card:hover::before {
  transform: scaleX(1);
}

.page-about .about-cert-mark {
  margin-bottom: 24px;
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 0.98;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--about-accent);
  transform: skewX(var(--about-skew));
}

.page-about .about-cert-card h3 {
  margin: 0 0 12px;
  font-size: 1.08rem;
  line-height: 1.35;
}

.page-about .about-cert-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ---- 05 合作媒体 ---- */
.page-about .about-media-section {
  background:
    repeating-linear-gradient(-55deg, rgba(255, 107, 0, 0.05) 0 2px, transparent 2px 22px),
    var(--color-bg-primary);
}

.page-about .about-media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 40px;
}

@media (min-width: 640px) {
  .page-about .about-media-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-media-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about .about-media-type {
  position: relative;
  padding: 28px 22px 26px;
  overflow: hidden;
  background: rgba(7, 18, 35, 0.7);
  border: 1px solid var(--about-border);
}

.page-about .about-media-type::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 18px;
  background: var(--about-accent);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-about .about-media-type::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 90px;
  height: 90px;
  border: 2px solid rgba(255, 107, 0, 0.35);
  transform: rotate(45deg);
}

.page-about .about-media-type span {
  display: block;
  margin-bottom: 10px;
  font-weight: 700;
  font-size: 1rem;
}

.page-about .about-media-type em {
  display: block;
  font-style: normal;
  font-family: var(--font-data);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--about-data);
}

.page-about .about-media-note {
  max-width: 720px;
  margin: 28px 0 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ---- 延伸入口 ---- */
.page-about .about-coda {
  padding: 48px 0 56px;
  background: var(--color-bg-deep);
  border-top: 6px solid var(--about-accent);
}

.page-about .about-coda-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.page-about .about-coda-label::before {
  content: "";
  width: 32px;
  height: 3px;
  background: var(--about-accent);
  transform: skewX(var(--about-skew));
}

.page-about .about-coda-inner {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .page-about .about-coda-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-coda-inner {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about .about-coda-link {
  display: block;
  padding: 36px 28px;
  color: var(--color-text);
  text-decoration: none;
  border-top: 1px solid var(--about-border);
  transition: background var(--speed-base) var(--ease), transform var(--speed-base) var(--ease);
}

.page-about .about-coda-link:first-child {
  border-top: 0;
}

.page-about .about-coda-link:hover {
  background: rgba(255, 107, 0, 0.1);
  transform: translateY(-4px);
}

@media (min-width: 560px) and (max-width: 959px) {
  .page-about .about-coda-link {
    border-top: 0;
  }
  .page-about .about-coda-link:nth-child(n + 3) {
    border-top: 1px solid var(--about-border);
  }
  .page-about .about-coda-link:nth-child(even) {
    border-left: 1px solid var(--about-border);
  }
}

@media (min-width: 960px) {
  .page-about .about-coda-link {
    border-top: 0;
  }
  .page-about .about-coda-link + .about-coda-link {
    border-left: 1px solid var(--about-border);
  }
}

.page-about .about-coda-index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--about-accent);
}

.page-about .about-coda-title {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  transform: skewX(var(--about-skew));
}

.page-about .about-coda-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ---- 焦点可见性 ---- */
.page-about .about-index a:focus-visible,
.page-about .timeline-item summary:focus-visible,
.page-about .about-coda-link:focus-visible {
  outline: 2px solid var(--about-data);
  outline-offset: 2px;
}

/* ---- 动效偏好 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}