/* ===== 页面作用域变量 ===== */
.page-about {
  --about-grid-line: rgba(255, 255, 255, 0.06);
  --about-sand-grid: rgba(11, 30, 51, 0.07);
  --about-card-border: rgba(255, 255, 255, 0.12);
  --about-text-body: rgba(255, 255, 255, 0.82);
  --about-deep-text: rgba(11, 30, 51, 0.78);
  background: var(--c-deep);
  color: var(--c-white);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ===== 首屏英雄区 ===== */
.about-hero {
  position: relative;
  padding: 18px 0 86px;
  background:
    radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1.4px),
    linear-gradient(135deg, var(--c-deep) 0%, #142a47 66%, var(--c-ocean) 100%);
  background-size: 26px 26px, 100% 100%;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), 0 100%);
  border-bottom: 3px solid var(--c-flame);
}

.about-hero__inner {
  position: relative;
  z-index: 2;
}

.about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: end;
  margin-top: 52px;
}

.about-hero__content {
  max-width: 720px;
}

.about-hero__content h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 18px 0 18px;
  text-wrap: balance;
}

.about-hero__lead {
  font-size: clamp(1rem, 2vw, 1.16rem);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.86);
  max-width: 660px;
  margin-bottom: 24px;
}

.about-hero__keywords {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0;
  margin: 0 0 28px;
  list-style: none;
}

.about-hero__keywords li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.9);
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
}

.about-hero__keywords li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--c-yellow);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(255, 215, 0, 0.35);
}

.about-hero__keywords li:nth-child(2)::before {
  background: var(--c-flame);
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.4);
}

.about-hero__keywords li:nth-child(3)::before {
  background: var(--c-electric);
  box-shadow: 0 0 12px rgba(46, 107, 255, 0.45);
}

.about-hero__keywords li:nth-child(4)::before {
  background: var(--c-yellow);
  box-shadow: 0 0 12px rgba(255, 215, 0, 0.35);
}

.about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.about-hero__meta span {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-gray);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.about-hero__meta span::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--c-flame);
  transform: rotate(45deg);
}

.about-hero__visual {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  overflow: hidden;
}

.about-hero__big {
  position: absolute;
  right: -0.04em;
  bottom: -0.18em;
  font-family: var(--font-heading);
  font-size: clamp(6rem, 18vw, 10rem);
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
  user-select: none;
}

.about-hero__coordinate {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.about-hero__axis {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
}

.about-hero__axis--x {
  left: 0;
  right: 0;
  top: 58%;
  height: 1px;
}

.about-hero__axis--y {
  top: 0;
  bottom: 0;
  left: 62%;
  width: 1px;
}

.about-hero__origin {
  position: absolute;
  left: 62%;
  top: 58%;
  width: 10px;
  height: 10px;
  background: var(--c-flame);
  transform: translate(-50%, -50%) rotate(45deg);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.15);
}

.about-hero__point {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-yellow);
}

.about-hero__point--p1 {
  left: 74%;
  top: 36%;
}

.about-hero__point--p2 {
  left: 36%;
  top: 70%;
  background: var(--c-electric);
}

.about-hero__point--p3 {
  left: 82%;
  top: 76%;
  background: var(--c-flame);
}

/* 右侧斜线色带 */
.about-hero__stripe {
  position: absolute;
  top: 0;
  right: 0;
  width: 30%;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 12px,
    rgba(255, 107, 53, 0.16) 12px 14px
  );
  clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 1;
}

/* ===== 品牌故事 ===== */
.about-story {
  position: relative;
  background: var(--c-sand);
  color: var(--c-deep);
  padding: 76px 0 80px;
  overflow: hidden;
}

.about-story__lines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 22px,
    rgba(11, 30, 51, 0.03) 22px 24px
  );
  pointer-events: none;
}

.about-story__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.about-story__media {
  position: relative;
}

.about-story__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  filter: saturate(1.05);
}

.about-story__badge {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--c-deep);
  background: var(--c-yellow);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 100%, 8px 100%);
  box-shadow: 0 8px 24px rgba(11, 30, 51, 0.18);
}

.about-story__content p {
  font-size: 1rem;
  line-height: 1.82;
  color: var(--about-deep-text);
  margin-bottom: 18px;
}

.about-story__content strong {
  color: var(--c-deep);
  font-weight: 700;
}

.about-story__facts {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.about-story__facts li {
  position: relative;
  padding: 12px 16px 12px 40px;
  background: rgba(255, 255, 255, 0.55);
  border-left: 4px solid var(--c-flame);
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--c-deep);
}

.about-story__facts li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 10px;
  height: 10px;
  background: var(--c-flame);
  transform: translateY(-50%) rotate(45deg);
}

/* ===== 里程碑 ===== */
.about-milestones {
  position: relative;
  background: linear-gradient(180deg, var(--c-indigo) 0%, var(--c-deep) 72%);
  color: var(--c-white);
  padding: 88px 0 92px;
  overflow: hidden;
}

.about-milestones__watermark {
  position: absolute;
  top: 0.1em;
  right: -0.06em;
  font-family: var(--font-heading);
  font-size: clamp(5rem, 16vw, 11rem);
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: rgba(255, 255, 255, 0.045);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

.about-timeline {
  list-style: none;
  margin: 60px 0 0;
  padding: 0;
  position: relative;
}

.about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 9px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-flame) 0%, var(--c-yellow) 55%, rgba(255, 255, 255, 0.16) 100%);
  border-radius: 2px;
}

.about-tl-item {
  position: relative;
  padding: 0 0 40px 44px;
}

.about-tl-item:last-child {
  padding-bottom: 0;
}

.about-tl__node {
  position: absolute;
  left: 0;
  top: 16px;
  width: 20px;
  height: 20px;
  background: var(--c-deep);
  border: 3px solid var(--c-flame);
  transform: rotate(45deg);
  border-radius: 2px;
  box-shadow: 0 0 0 5px rgba(255, 107, 53, 0.18);
}

.about-tl-item:nth-child(2) .about-tl__node {
  border-color: var(--c-yellow);
  box-shadow: 0 0 0 5px rgba(255, 215, 0, 0.14);
}

.about-tl-item:nth-child(3) .about-tl__node {
  border-color: var(--c-electric);
  box-shadow: 0 0 0 5px rgba(46, 107, 255, 0.18);
}

.about-tl-item:nth-child(4) .about-tl__node {
  border-color: var(--c-green);
  box-shadow: 0 0 0 5px rgba(0, 107, 94, 0.2);
}

.about-tl__card {
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.62) 0%, rgba(11, 30, 51, 0.82) 100%);
  border: 1px solid var(--about-card-border);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  padding: 0;
  transition: transform 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}

.about-tl__card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.45);
}

.about-tl__year {
  display: inline-block;
  padding: 12px 20px 0;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  color: var(--c-flame);
  letter-spacing: 0.03em;
}

.about-tl-item:nth-child(2) .about-tl__year {
  color: var(--c-yellow);
}

.about-tl-item:nth-child(3) .about-tl__year {
  color: var(--c-electric);
}

.about-tl-item:nth-child(4) .about-tl__year {
  color: var(--c-green);
}

.about-tl__card-inner {
  padding: 6px 20px 20px;
}

.about-tl__card-inner h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  color: var(--c-white);
}

.about-tl__card-inner p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.78);
}

.about-tl__card-inner strong {
  color: var(--c-white);
  font-weight: 700;
}

/* ===== 团队与文化 ===== */
.about-team {
  background:
    radial-gradient(rgba(11, 30, 51, 0.04) 1px, transparent 1.4px),
    var(--c-sand);
  background-size: 24px 24px, 100% 100%;
  padding: 80px 0;
  color: var(--c-deep);
}

.about-team__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.about-team__content p {
  font-size: 1rem;
  line-height: 1.78;
  color: var(--about-deep-text);
  margin-bottom: 16px;
}

.about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 28px 0 22px;
}

.about-team-stat {
  padding: 20px 12px;
  text-align: center;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(11, 30, 51, 0.1);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.about-team-stat__num {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1;
  color: var(--c-deep);
}

.about-team-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(11, 30, 51, 0.66);
}

.about-team-stat:nth-child(2) .about-team-stat__num {
  color: var(--c-electric);
}

.about-team-stat:nth-child(3) .about-team-stat__num {
  color: var(--c-flame);
}

.about-team__note {
  padding: 12px 16px;
  border-left: 4px solid var(--c-yellow);
  background: rgba(255, 215, 0, 0.1);
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(11, 30, 51, 0.82);
}

.about-team__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  box-shadow: 0 18px 40px rgba(11, 30, 51, 0.15);
}

/* ===== 资质与荣誉 ===== */
.about-credentials {
  position: relative;
  background:
    radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1.4px),
    linear-gradient(150deg, #0f2540 0%, var(--c-deep) 68%, #162123 100%);
  background-size: 26px 26px, 100% 100%;
  padding: 92px 0 84px;
  color: var(--c-white);
  overflow: hidden;
}

.about-credentials__band {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--c-wine) 0%, var(--c-flame) 70%, var(--c-yellow) 100%);
}

.about-credentials__inner {
  position: relative;
  z-index: 1;
}

.about-credentials__header {
  max-width: 640px;
  margin-bottom: 44px;
}

.about-credentials__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.about-credentials__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.about-cred-card {
  position: relative;
  padding: 24px 22px 22px 58px;
  background: rgba(30, 58, 95, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.09);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform 0.35s var(--ease-out), background 0.35s var(--ease-out);
}

.about-cred-card:hover {
  transform: translateY(-4px);
  background: rgba(30, 58, 95, 0.82);
}

.about-cred-card__icon {
  position: absolute;
  left: 18px;
  top: 24px;
  font-size: 1.3rem;
  color: var(--c-yellow);
}

.about-cred-card:nth-child(2) .about-cred-card__icon {
  color: var(--c-flame);
}

.about-cred-card:nth-child(3) .about-cred-card__icon {
  color: var(--c-wine);
}

.about-cred-card:nth-child(4) .about-cred-card__icon {
  color: var(--c-green);
}

.about-cred-card h3 {
  font-size: 1.05rem;
  font-family: var(--font-heading);
  font-weight: 400;
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.about-cred-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.66;
  color: rgba(255, 255, 255, 0.74);
}

.about-credentials__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  filter: grayscale(0.2) sepia(0.08);
}

/* ===== 合作伙伴 ===== */
.about-partners {
  position: relative;
  background: var(--c-sand);
  padding: 82px 0 84px;
  color: var(--c-deep);
  overflow: hidden;
}

.about-partners__rings {
  position: absolute;
  right: -120px;
  top: -120px;
  width: 360px;
  height: 360px;
  border: 2px solid rgba(11, 30, 51, 0.05);
  border-radius: 50%;
  pointer-events: none;
}

.about-partners__rings::before,
.about-partners__rings::after {
  content: "";
  position: absolute;
  border: 2px solid rgba(11, 30, 51, 0.04);
  border-radius: 50%;
}

.about-partners__rings::before {
  inset: 42px;
}

.about-partners__rings::after {
  inset: 88px;
}

.about-partners__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 48px;
  position: relative;
}

.about-partner-item {
  position: relative;
  padding: 26px 24px 24px 78px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(11, 30, 51, 0.08);
  border-left: 4px solid var(--c-electric);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.about-partner-item:hover {
  transform: translateX(6px);
  box-shadow: 0 12px 28px rgba(11, 30, 51, 0.1);
}

.about-partner-item:nth-child(2) {
  border-left-color: var(--c-flame);
}

.about-partner-item:nth-child(3) {
  border-left-color: var(--c-green);
}

.about-partner-item:nth-child(4) {
  border-left-color: var(--c-wine);
}

.about-partner-item__num {
  position: absolute;
  left: 22px;
  top: 26px;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: rgba(11, 30, 51, 0.2);
  line-height: 1;
}

.about-partner-item h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 400;
  margin: 0 0 8px;
}

.about-partner-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--about-deep-text);
}

/* ===== 继续探索 ===== */
.about-more {
  background:
    repeating-linear-gradient(-45deg, transparent 0 18px, rgba(255, 255, 255, 0.03) 18px 20px),
    linear-gradient(140deg, var(--c-indigo) 0%, var(--c-deep) 100%);
  padding: 76px 0 80px;
  color: var(--c-white);
}

.about-more__head {
  max-width: 560px;
  margin-bottom: 44px;
}

.about-more__head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 12px 0 10px;
}

.about-more__head p {
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.7;
  font-size: 1rem;
}

.about-more__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.about-more-card {
  display: flex;
  flex-direction: column;
  padding: 28px 26px 26px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: transform 0.35s var(--ease-out), background 0.35s var(--ease-out);
}

.about-more-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
}

.about-more-card__tag {
  align-self: flex-start;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-flame);
  text-transform: uppercase;
  padding: 5px 10px;
  background: rgba(255, 107, 53, 0.14);
  border: 1px solid rgba(255, 107, 53, 0.25);
  margin-bottom: 16px;
}

.about-more-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 400;
  margin: 0 0 10px;
}

.about-more-card p {
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
  margin-bottom: 22px;
  flex-grow: 1;
}

.about-more-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .about-hero__keywords {
    grid-template-columns: 1fr 1fr;
  }

  .about-story__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 56px;
  }

  .about-story__facts {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .about-story__facts li {
    padding-left: 36px;
  }

  .about-story__facts li::before {
    left: 12px;
  }

  .about-team__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
  }

  .about-credentials__cards {
    grid-template-columns: 1fr 1fr;
  }

  .about-credentials__split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
  }

  .about-partners__list {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 1024px) {
  .about-hero {
    padding: 24px 0 108px;
  }

  .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    min-height: 460px;
  }

  .about-hero__visual {
    min-height: 360px;
  }

  .about-timeline {
    margin-left: auto;
    margin-right: auto;
    max-width: 900px;
  }

  .about-tl__card-inner {
    padding: 8px 28px 24px;
  }

  .about-tl__year {
    padding: 14px 28px 0;
  }

  .about-milestones {
    padding: 104px 0 112px;
  }

  .about-partners__list {
    gap: 24px;
  }

  .about-more__grid {
    gap: 24px;
  }
}

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