/* ============ 品牌故事 / page-about ============ */
.page-about {
  --about-hair: rgba(37, 244, 208, .2);
  --about-hair-soft: rgba(37, 244, 208, .1);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(34px, 5vw, 76px);
  background:
    radial-gradient(118% 92% at 86% -6%, rgba(37, 244, 208, .15), transparent 58%),
    radial-gradient(88% 76% at 4% 100%, rgba(255, 176, 32, .1), transparent 60%),
    var(--abyss);
  border-bottom: 2px solid var(--obsidian);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  left: -10%;
  right: -10%;
  height: 82%;
  background:
    linear-gradient(118deg, rgba(37, 244, 208, .2), rgba(37, 244, 208, 0) 54%),
    linear-gradient(300deg, rgba(255, 176, 32, .16), rgba(255, 176, 32, 0) 46%);
  clip-path: polygon(0 0, 100% 0, 97% 100%, 0 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 244, 208, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 244, 208, .06) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 76%);
  pointer-events: none;
}

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

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  line-height: 1.4;
}

.page-about .breadcrumb__item {
  font-family: var(--font-mono);
  letter-spacing: .08em;
  color: var(--mint);
  text-decoration: none;
  transition: color .16s ease;
}

.page-about .breadcrumb__item:hover {
  color: var(--cyan);
}

.page-about .breadcrumb__item--current {
  color: var(--data-white);
}

.page-about .breadcrumb__sep {
  color: rgba(143, 179, 168, .45);
}

/* 首屏主体 */
.page-about .about-hero__stage {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(22px, 3.4vw, 40px);
}

.page-about .about-hero__tag {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 10px 0 18px;
  max-width: 18ch;
  font-size: clamp(2rem, 5.6vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -.035em;
  font-weight: 900;
  color: var(--data-white);
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(.95rem, 1.05vw, 1.06rem);
  line-height: 1.78;
  color: var(--body-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

/* 首屏数据块 */
.page-about .about-hero__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--about-hair);
  border: 2px solid var(--obsidian);
  box-shadow: var(--shadow-hard);
}

.page-about .about-metric {
  min-width: 0;
  padding: clamp(13px, 1.8vw, 20px);
  background: var(--stand);
}

.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2.8vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--amber);
}

.page-about .about-metric:nth-child(even) .about-metric__num {
  color: var(--cyan);
}

.page-about .about-metric__label {
  display: block;
  margin-top: 9px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--mint);
}

@media (min-width: 1024px) {
  .page-about .about-hero__stage {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }
}

/* ---------- 分屏主体 ---------- */
.page-about .about-body {
  padding: clamp(34px, 4.6vw, 76px) 0 clamp(40px, 5.4vw, 92px);
  background: var(--abyss);
}

.page-about .about-body__inner {
  display: grid;
  gap: clamp(28px, 3.4vw, 48px);
}

@media (min-width: 1024px) {
  .page-about .about-body__inner {
    grid-template-columns: minmax(196px, 240px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(36px, 4vw, 76px);
  }
}

/* 左侧索引栏 */
.page-about .about-rail {
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--hdr-h) + 26px);
  }
}

.page-about .about-rail .index-rail__title {
  margin: 0;
  color: var(--mint);
}

.page-about .about-rail .index-rail__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-rail .index-rail__list > li {
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-rail .index-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 2px;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--body-soft);
  text-decoration: none;
  transition: color .16s ease, transform .16s ease;
}

.page-about .about-rail .index-rail__link .mono {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mint);
  transition: color .16s ease;
}

.page-about .about-rail .index-rail__link:hover,
.page-about .about-rail .index-rail__link:hover .mono {
  color: var(--cyan);
}

.page-about .about-rail .index-rail__link[aria-current="true"] {
  color: var(--cyan-soft);
  transform: translateX(4px);
}

.page-about .about-rail .index-rail__link[aria-current="true"] .mono {
  color: var(--cyan-soft);
}

.page-about .about-rail__plate {
  margin-top: 22px;
  padding: 16px 16px 18px;
  border: 2px solid var(--obsidian);
  background: linear-gradient(142deg, rgba(37, 244, 208, .16), rgba(11, 43, 36, .96));
  box-shadow: var(--shadow-cyan);
}

.page-about .about-rail__plate .label {
  color: var(--cyan-soft);
}

.page-about .about-rail__ver {
  margin: 8px 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 4.4vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--cyan);
}

.page-about .about-rail__note {
  margin: 0;
  font-size: 12px;
  line-height: 1.62;
  color: var(--body-soft);
}

@media (max-width: 1023px) {
  .page-about .about-rail .index-rail__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    border-top: 0;
  }
  .page-about .about-rail .index-rail__list > li {
    border-bottom: 0;
  }
  .page-about .about-rail .index-rail__link {
    padding: 7px 12px;
    border: 1px solid var(--about-hair);
    background: var(--stand);
    font-size: 12.5px;
  }
  .page-about .about-rail .index-rail__link[aria-current="true"] {
    transform: none;
    border-color: var(--cyan);
    background: rgba(37, 244, 208, .1);
  }
}

/* 右侧内容流 */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-sec {
  position: relative;
  padding: clamp(26px, 3.4vw, 46px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-sec__kicker {
  margin: 0 0 10px;
  color: var(--cyan);
}

.page-about .about-sec__title {
  margin: 0 0 12px;
  max-width: 22ch;
  font-size: clamp(1.45rem, 2.9vw, 2.25rem);
  line-height: 1.14;
  letter-spacing: -.025em;
  font-weight: 900;
  color: var(--data-white);
}

.page-about .about-sec__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(.92rem, 1vw, 1rem);
  line-height: 1.78;
  color: var(--body-soft);
}

.page-about .about-sec__head--split {
  display: grid;
  gap: 16px;
}

@media (min-width: 760px) {
  .page-about .about-sec__head--split {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 28px;
  }
}

.page-about .about-spark {
  display: none;
  width: 240px;
  max-width: 100%;
  height: auto;
  color: var(--cyan);
}

.page-about .about-spark circle {
  fill: var(--amber);
}

@media (min-width: 760px) {
  .page-about .about-spark {
    display: block;
  }
}

.page-about .about-sec__media {
  margin: clamp(20px, 2.8vw, 30px) 0 0;
}

/* 版本时间轴 */
.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 30px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(37, 244, 208, .26) 62%, rgba(37, 244, 208, 0) 100%);
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: clamp(18px, 2.4vw, 28px);
}

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

.page-about .about-tl__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 2px solid var(--obsidian);
  background: var(--stand-2);
  box-shadow: var(--shadow-hard);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-tl__item:last-child .about-tl__badge {
  background: var(--amber);
  color: var(--obsidian);
  box-shadow: var(--shadow-amber);
}

.page-about .about-tl__name {
  margin: 2px 0 8px;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--data-white);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--body-soft);
}

@media (min-width: 720px) {
  .page-about .about-tl::before {
    left: 42px;
  }
  .page-about .about-tl__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 22px;
  }
}

/* 每日两轮 */
.page-about .about-shifts {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 2.8vw, 30px);
}

.page-about .about-shift {
  position: relative;
  padding: clamp(16px, 2.1vw, 22px);
  border: 2px solid var(--obsidian);
  background: var(--stand);
  box-shadow: var(--shadow-hard);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.page-about .about-shift::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 46%;
  height: 4px;
  background: var(--cyan);
}

.page-about .about-shift:nth-child(2)::before {
  width: 34%;
  background: var(--amber);
}

.page-about .about-shift:nth-child(3)::before {
  width: 58%;
  background: var(--lime);
}

.page-about .about-shift:hover {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
}

.page-about .about-shift .about-shift__tag {
  margin: 0 0 10px;
  color: var(--mint);
}

.page-about .about-shift .about-shift__name {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.42;
  color: var(--data-white);
}

.page-about .about-shift .about-shift__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--body-soft);
}

@media (min-width: 760px) {
  .page-about .about-shifts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--amber);
  background: rgba(255, 176, 32, .07);
  font-size: .9rem;
  line-height: 1.72;
  color: var(--body-soft);
}

.page-about .about-note .mono {
  font-size: .95rem;
  color: var(--amber);
}

/* 数据来源三步 */
.page-about .about-flows {
  display: grid;
  margin-top: clamp(20px, 2.8vw, 30px);
  border: 2px solid var(--obsidian);
  background: var(--stand);
  box-shadow: var(--shadow-hard);
}

.page-about .about-flow__step {
  padding: clamp(18px, 2.2vw, 26px);
}

.page-about .about-flow__step + .about-flow__step {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--cyan);
}

.page-about .about-flow__step:nth-child(2) .about-flow__num {
  color: var(--amber);
}

.page-about .about-flow__step:nth-child(3) .about-flow__num {
  color: var(--lime);
}

.page-about .about-flow__name {
  margin: 12px 0 8px;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.42;
  color: var(--data-white);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--body-soft);
}

@media (min-width: 880px) {
  .page-about .about-flows {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow__step + .about-flow__step {
    border-top: 0;
    border-left: 1px solid var(--about-hair);
  }
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 2.8vw, 34px);
  margin-top: clamp(20px, 2.8vw, 30px);
}

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

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

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-roles > li {
  display: grid;
  grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-roles > li:first-child {
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-roles__key {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.75;
  color: var(--cyan);
}

.page-about .about-roles__val {
  font-size: .9rem;
  line-height: 1.74;
  color: var(--body-soft);
}

@media (max-width: 519px) {
  .page-about .about-roles > li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

@media (min-width: 920px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    align-items: start;
  }
}

/* 里程碑 */
.page-about .about-miles {
  display: grid;
  gap: 2px;
  margin-top: clamp(20px, 2.8vw, 30px);
  background: var(--about-hair);
  border: 2px solid var(--obsidian);
  box-shadow: var(--shadow-hard);
}

.page-about .about-mile {
  padding: clamp(16px, 2.1vw, 24px);
  background: linear-gradient(160deg, var(--stand-2), var(--stand));
}

.page-about .about-mile__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--amber);
}

.page-about .about-mile__label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mint);
}

.page-about .about-miles__text {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 66ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--body-soft);
}

@media (min-width: 560px) {
  .page-about .about-miles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-miles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 站点信息 */
.page-about .about-info {
  display: grid;
  margin-top: clamp(20px, 2.8vw, 30px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-info__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-info__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-info__val {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--data-white);
  word-break: break-word;
}

.page-about .about-info__val--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--amber);
}

.page-about .about-info a.about-info__val {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-hair);
  transition: color .16s ease, border-color .16s ease;
}

.page-about .about-info a.about-info__val:hover {
  color: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

@media (min-width: 640px) {
  .page-about .about-info__row {
    grid-template-columns: minmax(0, 132px) minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

/* 结尾行动区 */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 4.2vw, 58px) 0;
  background: linear-gradient(120deg, var(--stand-2) 0%, var(--abyss) 68%);
  border-top: 2px solid var(--obsidian);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -6%;
  width: 46%;
  height: 180%;
  background: linear-gradient(200deg, rgba(255, 176, 32, .18), rgba(255, 176, 32, 0) 66%);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 2.8vw, 34px);
}

.page-about .about-cta__title {
  margin: 8px 0 12px;
  max-width: 18ch;
  font-size: clamp(1.5rem, 3.1vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -.025em;
  font-weight: 900;
  color: var(--data-white);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--body-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(28px, 4vw, 60px);
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}