/* ===== 品牌故事页专属样式 ===== */

.page-about {
  --about-track-gap: 24px;
  --about-node-size: 16px;
  --about-glow-green: rgba(57, 255, 20, 0.16);
  --about-glow-blue: rgba(0, 229, 255, 0.12);
  --about-glow-gold: rgba(255, 215, 0, 0.14);
  background: var(--bg-deep);
  color: var(--ink);
  overflow-x: hidden;
}

/* ===== 品牌碑文 ===== */

.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 280px;
  background: radial-gradient(ellipse at 80% 0%, rgba(0, 229, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 28px;
}

.page-about .about-hero__index {
  color: var(--green);
  white-space: nowrap;
}

.page-about .about-hero__note {
  white-space: nowrap;
  color: var(--muted);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin: 28px 0 16px;
  transform: skew(-3deg);
  transform-origin: left center;
  background: linear-gradient(115deg, var(--ink) 0%, var(--ink) 55%, var(--blue) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 660px;
  margin: 0 0 36px;
  border-left: 2px solid var(--border-line);
  padding-left: 18px;
}

.page-about .about-hero__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-line);
  margin-bottom: 48px;
  position: relative;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 50%, rgba(10, 14, 23, 0.55) 100%);
  border-radius: inherit;
  pointer-events: none;
}

.page-about .about-epigraph {
  position: relative;
  margin: 0;
  padding: 44px 28px 36px;
  background: var(--bg-panel);
  border: 1px solid var(--border-line);
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.page-about .about-epigraph__mark {
  position: absolute;
  top: -18px;
  left: 22px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 88px;
  line-height: 1;
  color: var(--gold);
  opacity: 0.85;
  pointer-events: none;
}

.page-about .about-epigraph__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.4;
  color: var(--ink);
  margin: 20px 0 14px;
}

.page-about .about-epigraph__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-transform: uppercase;
}

/* ===== 通用分节标题 ===== */

.page-about .about-section-head {
  margin-bottom: 40px;
}

.page-about .about-section-head__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--green);
}

.page-about .about-section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.15;
  margin: 0 0 12px;
  transform: skew(-3deg);
  transform-origin: left center;
}

.page-about .about-section-head__lead {
  font-family: var(--font-body);
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 580px;
}

/* ===== 从旧版到新官网：时间轴 ===== */

.page-about .about-journey {
  padding: 72px 0 80px;
  position: relative;
}

.page-about .about-journey::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(135deg, rgba(30, 42, 58, 0.4) 1px, transparent 1px),
    linear-gradient(45deg, rgba(30, 42, 58, 0.25) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-journey .about-section-head {
  text-align: left;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 30px;
}

.page-about .about-timeline__line {
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--green) 0%, var(--blue) 40%, var(--green) 75%, var(--gold) 100%);
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 42px;
}

.page-about .about-timeline__node {
  position: absolute;
  left: -30px;
  top: 12px;
  width: var(--about-node-size);
  height: var(--about-node-size);
  border-radius: 50%;
  background: var(--green);
  box-shadow:
    0 0 0 4px var(--about-glow-green),
    0 0 22px rgba(57, 255, 20, 0.4);
  z-index: 1;
}

.page-about .about-timeline__node::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 1px solid var(--green);
}

.page-about .about-timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-timeline__phase {
  color: var(--blue);
  font-weight: 500;
}

.page-about .about-timeline__code {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-line);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
}

.page-about .about-timeline__body {
  background: var(--bg-panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-timeline__body:hover {
  border-color: rgba(57, 255, 20, 0.4);
  box-shadow: 0 0 0 3px var(--about-glow-green);
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-timeline__body p {
  font-family: var(--font-body);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
}

.page-about .about-timeline__media-wrap {
  margin-bottom: 44px;
}

.page-about .about-timeline__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-line);
  position: relative;
}

.page-about .about-timeline__media::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--green), var(--blue));
  z-index: 1;
}

.page-about .about-timeline__media-note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

/* ===== 数据与覆盖 ===== */

.page-about .about-data {
  padding: 72px 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  position: relative;
  overflow: hidden;
}

.page-about .about-data::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.09) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-data::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

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

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 52px;
}

.page-about .about-data-cell {
  position: relative;
  background: var(--bg-deep);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-data-cell::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue), transparent);
  opacity: 0.6;
}

.page-about .about-data-cell:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.4);
}

.page-about .about-data-cell__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1;
  color: var(--ink);
  display: inline-flex;
  align-items: flex-start;
  gap: 4px;
  transform: skew(-3deg);
}

.page-about .about-data-cell__unit {
  font-size: 22px;
  font-weight: 700;
  color: var(--blue);
  margin-top: 10px;
}

.page-about .about-data-cell__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--green);
  margin: 14px 0 6px;
}

.page-about .about-data-cell__desc {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-data-detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-data-detail__text h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  margin: 0 0 16px;
}

.page-about .about-data-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.page-about .about-data-list li {
  position: relative;
  padding: 10px 0 10px 22px;
  font-family: var(--font-body);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  border-bottom: 1px solid rgba(30, 42, 58, 0.7);
}

.page-about .about-data-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--about-glow-green);
}

.page-about .about-data-list li:last-child {
  border-bottom: none;
}

.page-about .about-data-detail__btn {
  margin-top: 4px;
}

.page-about .about-data-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-line);
  position: relative;
}

.page-about .about-data-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(to top, rgba(10, 14, 23, 0.5) 0%, transparent 40%);
  pointer-events: none;
}

/* ===== 服务承诺 ===== */

.page-about .about-promise {
  padding: 72px 0 84px;
  position: relative;
}

.page-about .about-promise::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(90%, 1080px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, 0.5), transparent);
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 40px;
}

.page-about .about-promise-card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: 28px 26px 24px;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-promise-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.page-about .about-promise-card__mark {
  position: absolute;
  top: 14px;
  right: 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 44px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.page-about .about-promise-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  margin: 0 0 12px;
  position: relative;
  padding-bottom: 10px;
}

.page-about .about-promise-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  background: var(--blue);
  border-radius: 999px;
}

.page-about .about-promise-card:first-child h3::after {
  background: var(--green);
}

.page-about .about-promise-card:last-child h3::after {
  background: var(--gold);
}

.page-about .about-promise-card p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 20px;
  padding-right: 20px;
}

.page-about .about-promise-note {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 28px;
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.05), rgba(0, 229, 255, 0.05));
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  align-items: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-promise-note::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--blue), var(--gold));
}

.page-about .about-promise-note__badge {
  justify-self: start;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 40px);
  color: var(--gold);
  transform: skew(-3deg);
  padding: 2px 14px;
  border: 1px solid rgba(255, 215, 0, 0.55);
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.page-about .about-promise-note__text {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-promise-note__cta {
  justify-self: start;
}

/* ===== 响应式：平板及以上 ===== */

@media (min-width: 640px) {
  .page-about .about-epigraph {
    padding: 52px 48px 40px;
  }

  .page-about .about-data-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .about-data-cell {
    padding: 28px 22px;
  }

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

  .page-about .about-promise-note {
    grid-template-columns: auto 1fr auto;
  }

  .page-about .about-promise-note__badge {
    font-size: 30px;
  }
}

/* ===== 响应式：桌面 ===== */

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 56px 0 80px;
  }

  .page-about .about-hero__title {
    margin-top: 36px;
  }

  .page-about .about-hero__lead {
    font-size: 18px;
    max-width: 720px;
  }

  .page-about .about-hero__media {
    margin-bottom: 56px;
  }

  .page-about .about-epigraph__text {
    max-width: 800px;
  }

  .page-about .about-section-head {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    grid-template-rows: auto auto;
    column-gap: 40px;
    margin-bottom: 56px;
  }

  .page-about .about-section-head__index {
    grid-column: 1 / -1;
  }

  .page-about .about-section-head h2 {
    grid-column: 1;
    margin: 0;
  }

  .page-about .about-section-head__lead {
    grid-column: 2;
    align-self: end;
    margin: 0;
    max-width: 520px;
    justify-self: end;
  }

  .page-about .about-journey,
  .page-about .about-data,
  .page-about .about-promise {
    padding: 96px 0;
  }

  .page-about .about-timeline__body {
    padding: 28px 34px;
  }

  .page-about .about-timeline__body h3 {
    font-size: 23px;
  }

  .page-about .about-timeline__body p {
    font-size: 16px;
  }

  .page-about .about-timeline__media-wrap {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 28px;
    margin-bottom: 48px;
  }

  .page-about .about-timeline__media-note {
    margin-top: 0;
    text-align: left;
  }

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

  .page-about .about-data-cell {
    padding: 34px 26px;
  }

  .page-about .about-data-cell__num {
    font-size: clamp(48px, 5vw, 72px);
  }

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

  .page-about .about-data-detail__text {
    padding-right: 12px;
  }

  .page-about .about-data-media {
    aspect-ratio: 4 / 3;
  }

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

  .page-about .about-promise-card {
    padding: 32px 28px 26px;
  }

  .page-about .about-promise-card p {
    font-size: 15.5px;
  }

  .page-about .about-promise-note {
    padding: 36px 40px;
    gap: 28px;
  }
}

/* ===== 细节修正：确保大屏展示稳定 ===== */

@media (min-width: 1440px) {
  .page-about .about-hero__lead {
    max-width: 780px;
  }
}