/* ===== 品牌概况页专属样式 · 限定在 .page-about ===== */
.page-about {
  --about-line: rgba(245, 247, 250, 0.14);
  --about-card-bg: rgba(11, 30, 58, 0.72);
  background: var(--c-deep);
  color: var(--c-fog);
  overflow-x: hidden;
}

/* ===== 首屏档案封面 ===== */
.page-about .about-hero {
  position: relative;
  padding: 108px 0 0;
  background:
    linear-gradient(120deg, transparent 0%, transparent 40%, rgba(0, 229, 255, 0.05) 40%, rgba(0, 229, 255, 0.05) 41.5%, transparent 41.5%),
    radial-gradient(900px 360px at 88% 12%, rgba(123, 93, 255, 0.2), transparent 70%),
    radial-gradient(720px 340px at 6% 92%, rgba(0, 229, 255, 0.1), transparent 68%),
    var(--c-ink);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-orange) 26%, var(--c-cyan) 26%, var(--c-cyan) 34%, transparent 34%);
  z-index: 2;
}

.page-about .about-hero::after {
  content: "ABOUT";
  position: absolute;
  right: -12px;
  bottom: 6px;
  font-family: var(--font-head);
  font-size: clamp(92px, 18vw, 220px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(245, 247, 250, 0.07);
  pointer-events: none;
  z-index: 0;
}

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

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 13px;
}

.page-about .breadcrumb-link {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color var(--t-fast);
}

.page-about .breadcrumb-link:hover {
  color: var(--c-orange);
}

.page-about .breadcrumb-sep {
  color: var(--c-silver);
  opacity: 0.65;
}

.page-about .breadcrumb-item {
  color: var(--c-fog);
}

/* 首屏布局 */
.page-about .about-hero-layout {
  display: grid;
  gap: 40px;
  padding: 40px 0 36px;
}

.page-about .about-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-about .kicker-mark {
  display: inline-block;
  width: 30px;
  height: 3px;
  background: var(--c-orange);
  transform: skewX(-26deg);
  border-radius: 2px;
}

.page-about .about-hero-title {
  margin: 18px 0 22px;
  font-family: var(--font-head);
  font-size: clamp(38px, 6vw, 74px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-about .hero-accent {
  position: relative;
  white-space: nowrap;
  color: var(--c-orange);
}

.page-about .hero-accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 5px;
  height: 9px;
  background: linear-gradient(90deg, rgba(255, 107, 44, 0.45), transparent);
  border-radius: 2px;
  z-index: -1;
}

.page-about .about-hero-desc {
  max-width: 580px;
  margin: 0;
  color: var(--c-silver);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 26px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* 数据卡 */
.page-about .about-facts {
  display: grid;
  gap: 14px;
}

.page-about .fact-card {
  position: relative;
  padding: 18px 18px 16px;
  background: var(--about-card-bg);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .fact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.5);
}

.page-about .fact-card::before {
  content: "";
  position: absolute;
  right: -22px;
  top: -22px;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.page-about .fact-card-featured {
  border-left-color: var(--c-orange);
}

.page-about .fact-card-featured::before {
  background: radial-gradient(circle, rgba(255, 107, 44, 0.22), transparent 70%);
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-fog);
}

.page-about .fact-card-featured .fact-num {
  color: var(--c-orange);
}

.page-about .fact-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-silver);
  line-height: 1.5;
}

/* 首屏斜切装饰 */
.page-about .hero-bottom-line {
  position: relative;
  height: 54px;
  overflow: hidden;
  pointer-events: none;
}

.page-about .hero-bottom-line::before {
  content: "";
  position: absolute;
  left: -8%;
  right: 42%;
  top: 50%;
  height: 12px;
  background: var(--c-orange);
  transform: skewX(-26deg);
  border-radius: 2px;
  opacity: 0.8;
}

.page-about .hero-bottom-line::after {
  content: "";
  position: absolute;
  left: 34%;
  right: -8%;
  top: 50%;
  height: 4px;
  background: var(--c-cyan);
  transform: skewX(-26deg);
  border-radius: 2px;
  opacity: 0.55;
}

/* ===== 品牌定位 ===== */
.page-about .about-positioning {
  position: relative;
  padding: 84px 0 72px;
  background:
    radial-gradient(760px 300px at 90% 8%, rgba(0, 229, 255, 0.08), transparent 70%),
    var(--c-deep);
}

.page-about .positioning-grid {
  display: grid;
  gap: 44px;
  align-items: center;
}

.page-about .positioning-visual {
  position: relative;
}

.page-about .positioning-visual::before {
  content: "";
  position: absolute;
  inset: -14px 24px 24px -14px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-lg);
  transform: rotate(-2deg);
  pointer-events: none;
}

.page-about .positioning-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(245, 247, 250, 0.16);
  box-shadow: var(--shadow-fab);
}

.page-about .visual-badge {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 2;
  box-shadow: var(--shadow-card);
}

.page-about .visual-chip {
  position: absolute;
  top: 18px;
  left: -12px;
  z-index: 2;
  padding: 7px 15px;
  background: var(--c-cyan);
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transform: rotate(-4deg);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

.page-about .positioning-copy {
  position: relative;
}

.page-about .positioning-copy::before {
  content: "P";
  position: absolute;
  top: -34px;
  right: -4px;
  font-family: var(--font-head);
  font-size: 120px;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 107, 44, 0.1);
  pointer-events: none;
}

.page-about .positioning-copy .section-title {
  margin: 10px 0 18px;
  color: var(--c-fog);
}

.page-about .positioning-text {
  margin: 0 0 14px;
  color: var(--c-silver);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .positioning-list {
  list-style: none;
  margin: 24px 0 30px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .positioning-list li {
  position: relative;
  padding-left: 26px;
  color: var(--c-fog);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .positioning-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 14px;
  height: 9px;
  background: var(--c-orange);
  transform: skewX(-30deg);
  border-radius: 2px;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  position: relative;
  padding: 76px 0;
  background:
    linear-gradient(180deg, rgba(5, 10, 24, 0.55), rgba(5, 10, 24, 0.85)),
    repeating-linear-gradient(135deg, rgba(0, 229, 255, 0.035) 0, rgba(0, 229, 255, 0.035) 2px, transparent 2px, transparent 14px);
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 44, 0.7) 18%, transparent 42%, rgba(0, 229, 255, 0.55) 78%, transparent);
  opacity: 0.6;
}

.page-about .section-head {
  max-width: 780px;
  margin-bottom: 36px;
}

.page-about .section-kicker {
  display: block;
  margin-bottom: 6px;
}

.page-about .section-title {
  margin: 10px 0 0;
  color: var(--c-fog);
}

.page-about .section-subtitle {
  margin: 14px 0 0;
  color: var(--c-silver);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .milestone-cover {
  position: relative;
  margin: 40px 0 56px;
}

.page-about .milestone-cover::after {
  content: "";
  position: absolute;
  left: 8%;
  bottom: -20px;
  width: 30%;
  height: 20px;
  background: rgba(0, 229, 255, 0.22);
  transform: skewX(-32deg);
  border-radius: 0 0 4px 4px;
  pointer-events: none;
}

.page-about .milestone-cover-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(245, 247, 250, 0.12);
  box-shadow: var(--shadow-fab);
}

/* 时间线 */
.page-about .timeline-wrap {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
}

.page-about .timeline-rail {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-orange), var(--c-cyan) 55%, rgba(0, 229, 255, 0.35), transparent 95%);
  border-radius: 4px;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 28px;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 56px;
}

.page-about .timeline-node {
  position: absolute;
  left: 6px;
  top: 6px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid rgba(0, 229, 255, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 5px rgba(0, 229, 255, 0.1), 0 0 18px rgba(0, 229, 255, 0.22);
  z-index: 2;
}

.page-about .timeline-node span {
  font-family: var(--font-head);
  font-size: 9px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-about .timeline-node-current {
  border-color: var(--c-orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 44, 0.14), 0 0 24px rgba(255, 107, 44, 0.4);
}

.page-about .timeline-node-current span {
  color: var(--c-orange);
}

.page-about .timeline-card {
  position: relative;
  padding: 20px 22px 22px;
  background: var(--about-card-bg);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
  transition: transform var(--t-fast), box-shadow var(--t-fast), border-color var(--t-fast);
}

.page-about .timeline-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 56px;
  background: linear-gradient(90deg, var(--c-cyan), transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast);
}

.page-about .timeline-card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 86px;
  height: 8px;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.8), rgba(0, 229, 255, 0.18));
  clip-path: polygon(10px 0, calc(100% - 10px) 0, 100% 100%, 0 100%);
  border-radius: 0 0 2px 2px;
}

.page-about .timeline-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: var(--shadow-card);
}

.page-about .timeline-card:hover::before {
  opacity: 0.09;
}

.page-about .timeline-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-about .timeline-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-silver);
  line-height: 1.75;
}

.page-about .timeline-card-current {
  border-color: rgba(255, 107, 44, 0.5);
  background: linear-gradient(135deg, rgba(255, 107, 44, 0.1), rgba(11, 30, 58, 0.78));
}

.page-about .timeline-card-current::after {
  background: linear-gradient(90deg, var(--c-orange), rgba(255, 107, 44, 0.2));
}

/* 时间线底部提示条 */
.page-about .milestone-more {
  margin-top: 56px;
  padding: 26px 24px;
  background: linear-gradient(120deg, rgba(255, 107, 44, 0.13), rgba(0, 229, 255, 0.08));
  border-left: 3px solid var(--c-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-about .milestone-more p {
  margin: 0;
  max-width: 520px;
  color: var(--c-silver);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .milestone-more-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 稳定版维护理念 ===== */
.page-about .about-stability {
  position: relative;
  padding: 84px 0;
}

.page-about .stability-grid {
  display: grid;
  gap: 20px;
}

.page-about .stability-card {
  position: relative;
  padding: 26px 24px;
  background: var(--about-card-bg);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--t-fast), box-shadow var(--t-fast), border-color var(--t-fast);
}

.page-about .stability-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 72px;
  height: 72px;
  background: linear-gradient(225deg, rgba(0, 229, 255, 0.16), transparent 62%);
  transition: background var(--t-fast);
}

.page-about .stability-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, rgba(255, 107, 44, 0.8), rgba(255, 107, 44, 0.1));
  opacity: 0.45;
  transition: opacity var(--t-fast);
}

.page-about .stability-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 107, 44, 0.5);
  box-shadow: var(--shadow-card);
}

.page-about .stability-card:hover::after {
  opacity: 1;
}

.page-about .stability-num {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-head);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(245, 247, 250, 0.35);
}

.page-about .stability-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-about .stability-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-silver);
  line-height: 1.7;
}

/* ===== 服务与支持 ===== */
.page-about .about-support {
  padding: 64px 0 88px;
}

.page-about .support-panel {
  position: relative;
  display: grid;
  gap: 40px;
  padding: 44px 24px 36px;
  background: var(--c-ink);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .support-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-orange) 30%, var(--c-cyan) 30%, var(--c-cyan) 46%, transparent 46%);
  opacity: 0.85;
}

.page-about .support-panel::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 93, 255, 0.22), transparent 70%);
  pointer-events: none;
}

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

.page-about .support-copy .section-title {
  margin: 10px 0 16px;
}

.page-about .support-text {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--c-silver);
  line-height: 1.8;
}

.page-about .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-about .support-contact {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(245, 247, 250, 0.1);
}

.page-about .support-contact-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(245, 247, 250, 0.1);
}

.page-about .support-contact-item dt {
  padding-top: 3px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .support-contact-item dd {
  margin: 0;
  font-size: 15px;
  color: var(--c-fog);
  line-height: 1.6;
  word-break: break-word;
}

/* ===== 底部地标剪影 ===== */
.page-about .about-landmark {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: flex-end;
  background: var(--c-ink);
  overflow: hidden;
}

.page-about .landmark-figure {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}

.page-about .landmark-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 10, 24, 0.28), transparent 60%);
}

.page-about .landmark-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.page-about .landmark-message {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 56px 0 48px;
  background: linear-gradient(180deg, rgba(5, 10, 24, 0.4), var(--c-ink) 88%);
}

.page-about .landmark-inner {
  display: grid;
  gap: 24px;
  justify-items: start;
}

.page-about .landmark-inner p {
  margin: 0;
  max-width: 680px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.6vw, 26px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

/* ===== 响应式增强 ===== */
@media (min-width: 520px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 720px) {
  .page-about .stability-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 128px;
  }

  .page-about .about-hero-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.7fr);
    gap: 64px;
    align-items: end;
    padding: 56px 0 40px;
  }

  .page-about .about-facts {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about .positioning-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 72px;
  }

  .page-about .milestone-cover {
    max-width: 860px;
    margin-left: auto;
    margin-right: 0;
  }

  .page-about .timeline-rail {
    left: 35px;
  }

  .page-about .timeline-item {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
    padding-left: 0;
  }

  .page-about .timeline-node {
    position: relative;
    left: auto;
    top: 4px;
    justify-self: center;
  }

  .page-about .timeline-card {
    padding: 24px 28px 26px;
  }

  .page-about .support-panel {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 56px;
    padding: 52px 60px 44px;
  }

  .page-about .support-contact-item {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .page-about .about-landmark {
    min-height: 420px;
  }
}

@media (min-width: 1080px) {
  .page-about .stability-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}