.page-about {
  --about-index-w: 208px;
  --about-gap: clamp(28px, 5vw, 64px);
  background: var(--gj-space);
  color: var(--gj-white);
  font-family: var(--gj-font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--gj-header-h) + clamp(36px, 7vw, 72px)) 0 clamp(48px, 7vw, 88px);
  border-bottom: 1px solid var(--gj-line);
  overflow: hidden;
}

.page-about .about-hero__pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(0, 229, 255, 0.16) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(160deg, #000 0%, transparent 68%);
  mask-image: linear-gradient(160deg, #000 0%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__pattern::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -20%;
  width: 62%;
  height: 130%;
  background: linear-gradient(120deg, rgba(0, 229, 255, 0.12), rgba(255, 107, 53, 0.07) 60%, transparent);
  transform: skewX(-12deg);
}

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

.page-about .about-hero__eyebrow {
  margin: clamp(24px, 4vw, 40px) 0 0;
  font-family: var(--gj-font-num);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gj-cyan);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--gj-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 92px);
  line-height: 0.98;
  letter-spacing: 0.02em;
  max-width: 16ch;
}

.page-about .about-hero__title-accent {
  display: inline-block;
  color: var(--gj-cyan);
  padding-bottom: 0.1em;
  box-shadow: inset 0 -0.08em 0 rgba(0, 229, 255, 0.28);
}

.page-about .about-hero__lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--gj-mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--gj-line-strong);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 1px solid var(--gj-line-cyan);
}

.page-about .about-hero__num {
  font-family: var(--gj-font-num);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  color: var(--gj-white);
}

.page-about .about-hero__unit {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gj-silver);
}

.page-about .about-hero__annot {
  display: none;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-body__main {
  min-width: 0;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--gj-header-h);
  z-index: 6;
  margin: 0 calc(-1 * clamp(20px, 5vw, 64px));
  padding: 10px clamp(20px, 5vw, 64px);
  background: rgba(10, 26, 47, 0.94);
  border-bottom: 1px solid var(--gj-line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-about .about-index__label {
  display: none;
  margin: 0 0 12px;
  font-family: var(--gj-font-num);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--gj-silver);
}

.page-about .about-index__list {
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--gj-mist);
  text-decoration: none;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--gj-ease), border-color 0.2s var(--gj-ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gj-cyan);
  border-bottom-color: var(--gj-cyan);
}

.page-about .about-index__num {
  font-family: var(--gj-font-num);
  font-size: 11px;
  color: var(--gj-cyan);
  letter-spacing: 0.08em;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(36px, 6vw, 72px) 0 0;
  scroll-margin-top: calc(var(--gj-header-h) + 72px);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--gj-font-num);
  font-size: 12px;
  letter-spacing: 0.34em;
  color: var(--gj-cyan);
}

.page-about .about-chapter:target .about-chapter__num {
  color: var(--gj-orange);
}

.page-about .about-chapter__title {
  margin: 12px 0 clamp(20px, 3vw, 28px);
  font-family: var(--gj-font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 46px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  max-width: 22ch;
}

.page-about .about-subtitle {
  margin: clamp(30px, 4vw, 44px) 0 14px;
  font-family: var(--gj-font-display);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--gj-white);
  padding-left: 12px;
  border-left: 3px solid var(--gj-orange);
}

.page-about .about-text {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--gj-mist);
}

.page-about .about-quote {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 30px);
  border-left: 2px solid var(--gj-cyan);
  background: linear-gradient(100deg, rgba(0, 229, 255, 0.08), transparent 70%);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--gj-font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 26px);
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--gj-white);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(28px, 4vw, 40px) 0 0;
}

.page-about .about-figure img,
.page-about .about-split__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--gj-line);
  background: var(--gj-panel);
}

.page-about .about-split__media {
  margin: 24px 0 0;
}

/* ---------- 横向数据带 ---------- */
.page-about .about-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding: clamp(20px, 3vw, 30px) clamp(14px, 3vw, 26px);
  border-top: 1px solid var(--gj-line-strong);
  border-bottom: 1px solid var(--gj-line-strong);
  background: linear-gradient(102deg, rgba(0, 229, 255, 0.1), rgba(18, 46, 74, 0.55) 48%, rgba(255, 107, 53, 0.09));
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 0 100%);
}

.page-about .about-band--alt {
  background: linear-gradient(102deg, rgba(255, 107, 53, 0.1), rgba(18, 46, 74, 0.5) 55%, rgba(0, 229, 255, 0.09));
}

.page-about .about-band__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-band__num {
  font-family: var(--gj-font-num);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 34px);
  line-height: 1.05;
  color: var(--gj-cyan);
  letter-spacing: -0.01em;
}

.page-about .about-band--alt .about-band__num {
  color: var(--gj-orange);
}

.page-about .about-band__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gj-silver);
}

/* ---------- 三条线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-about .about-line {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--gj-line);
  background: rgba(18, 46, 74, 0.42);
}

.page-about .about-line__tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  font-family: var(--gj-font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gj-cyan);
  border: 1px solid var(--gj-line-cyan);
}

.page-about .about-line__tag--orange {
  color: var(--gj-orange);
  border-color: rgba(255, 107, 53, 0.45);
}

.page-about .about-line__title {
  margin: 0 0 8px;
  font-family: var(--gj-font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  letter-spacing: 0.03em;
}

.page-about .about-line__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gj-mist);
}

/* ---------- 矩阵图 ---------- */
.page-about .about-matrix {
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: clamp(14px, 3vw, 24px);
  border: 1px solid var(--gj-line);
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 107, 53, 0.1), transparent 60%),
    rgba(14, 36, 64, 0.6);
}

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

.page-about .about-matrix__cap {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--gj-silver);
  letter-spacing: 0.02em;
}

/* ---------- 研究板 ---------- */
.page-about .about-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--gj-line);
  border: 1px solid var(--gj-line);
}

.page-about .about-board__item {
  padding: clamp(16px, 2.5vw, 22px);
  background: var(--gj-space-2);
}

.page-about .about-board__idx {
  font-family: var(--gj-font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gj-cyan);
}

.page-about .about-board__name {
  margin: 6px 0 6px;
  font-family: var(--gj-font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--gj-white);
}

.page-about .about-board__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gj-mist);
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 16px 18px 18px;
  border-left: 2px solid var(--gj-cyan-deep);
  background: rgba(18, 46, 74, 0.32);
  transition: border-color 0.25s var(--gj-ease), background 0.25s var(--gj-ease);
}

.page-about .about-flow__step:hover {
  border-left-color: var(--gj-cyan);
  background: rgba(18, 46, 74, 0.62);
}

.page-about .about-flow__n {
  font-family: var(--gj-font-num);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gj-cyan);
}

.page-about .about-flow__t {
  margin: 6px 0 6px;
  font-family: var(--gj-font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-flow__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gj-mist);
}

.page-about .about-split {
  margin-top: clamp(28px, 4vw, 40px);
}

/* ---------- 时间轴 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--gj-line-strong);
}

.page-about .about-step {
  position: relative;
  padding: 0 0 clamp(24px, 4vw, 34px);
}

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

.page-about .about-step__dot {
  position: absolute;
  left: calc(-22px - 5px);
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--gj-space);
  border: 1px solid var(--gj-cyan);
  transform: rotate(45deg);
  transition: transform 0.25s var(--gj-ease), background 0.25s var(--gj-ease), border-color 0.25s var(--gj-ease);
}

.page-about .about-step:hover .about-step__dot {
  background: var(--gj-cyan);
  transform: rotate(45deg) scale(1.5);
}

.page-about .about-step--current .about-step__dot {
  background: var(--gj-orange);
  border-color: var(--gj-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

.page-about .about-step:hover .about-step--current .about-step__dot {
  background: var(--gj-orange);
}

.page-about .about-step__year {
  display: inline-block;
  font-family: var(--gj-font-num);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gj-cyan);
}

.page-about .about-step--current .about-step__year {
  color: var(--gj-orange);
}

.page-about .about-step__title {
  margin: 8px 0 8px;
  font-family: var(--gj-font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: 0.03em;
  color: var(--gj-white);
  transition: color 0.25s var(--gj-ease);
}

.page-about .about-step:hover .about-step__title {
  color: var(--gj-cyan);
}

.page-about .about-step--current:hover .about-step__title {
  color: var(--gj-orange);
}

.page-about .about-step__text {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gj-mist);
}

.page-about .about-compat {
  margin-top: clamp(24px, 4vw, 34px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--gj-line);
  background: rgba(18, 46, 74, 0.5);
}

.page-about .about-compat__title {
  margin: 0 0 10px;
  font-family: var(--gj-font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--gj-white);
}

.page-about .about-compat__text {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gj-mist);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(22px, 3vw, 30px) 0 0;
}

.page-about .about-partner {
  padding: 18px 20px;
  border: 1px solid var(--gj-line);
  background: linear-gradient(135deg, rgba(18, 46, 74, 0.6), rgba(10, 26, 47, 0.3));
  transition: transform 0.25s var(--gj-ease), border-color 0.25s var(--gj-ease);
}

.page-about .about-partner:hover {
  transform: translateY(-4px);
  border-color: var(--gj-line-cyan);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--gj-font-num);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  color: var(--gj-cyan);
}

.page-about .about-partner__name {
  margin: 10px 0 6px;
  font-family: var(--gj-font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--gj-white);
}

.page-about .about-partner__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gj-mist);
}

.page-about .about-honor {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-honor__item {
  position: relative;
  padding: 12px 16px 12px 34px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gj-white);
  border: 1px solid var(--gj-line);
  background: rgba(14, 36, 64, 0.6);
}

.page-about .about-honor__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 19px;
  width: 7px;
  height: 7px;
  background: var(--gj-orange);
  transform: rotate(45deg);
}

/* ---------- CTA 与按钮 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--gj-line-cyan);
  background:
    linear-gradient(120deg, rgba(0, 229, 255, 0.1), transparent 55%),
    rgba(18, 46, 74, 0.55);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 0 100%);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 32em;
  font-family: var(--gj-font-display);
  font-size: clamp(17px, 2.4vw, 22px);
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--gj-white);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

.page-about .about-links:last-child {
  margin-bottom: 0;
}

/* ---------- 中屏 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-split {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 36px);
    align-items: start;
  }

  .page-about .about-split__media {
    margin: 0;
  }

  .page-about .about-honor {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：左索引右正文 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-bottom: clamp(64px, 7vw, 104px);
  }

  .page-about .about-hero__annot {
    display: block;
    position: absolute;
    right: clamp(8px, 2vw, 24px);
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    transform-origin: center;
    white-space: nowrap;
    color: var(--gj-silver);
    opacity: 0.75;
  }

  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--gj-header-h) + 32px);
    margin: 0;
    padding: 0 0 0 14px;
    background: transparent;
    border-bottom: 0;
    border-left: 1px solid var(--gj-line-strong);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .page-about .about-index__label {
    display: block;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-index__list li {
    margin-bottom: 2px;
  }

  .page-about .about-index__link {
    display: flex;
    align-items: baseline;
    gap: 8px;
    white-space: normal;
    padding: 8px 10px;
    font-size: 13px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -15px;
    transition: color 0.2s var(--gj-ease), border-color 0.2s var(--gj-ease), background 0.2s var(--gj-ease);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--gj-cyan);
    background: rgba(0, 229, 255, 0.06);
    color: var(--gj-cyan);
  }

  .page-about .about-chapter {
    scroll-margin-top: calc(var(--gj-header-h) + 40px);
    padding-top: clamp(48px, 6vw, 80px);
  }

  .page-about .about-chapter:first-child {
    padding-top: 8px;
  }

  .page-about .about-hero__title {
    max-width: 18ch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__lead {
    max-width: 36em;
  }

  .page-about .about-partners {
    gap: 18px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-step__dot,
  .page-about .about-step__title,
  .page-about .about-flow__step {
    transition: none;
  }

  .page-about .about-partner:hover {
    transform: none;
  }

  .page-about .about-step:hover .about-step__dot {
    transform: rotate(45deg);
  }
}