/* ===== 品牌价值 / page-about ===== */

.page-about {
  --about-note-ease: cubic-bezier(.2, .7, .2, 1);
  --about-hair-soft: rgba(147, 170, 189, .16);
}

/* 右侧细长阅读进度线（仅宽屏可见，纯装饰） */
.page-about .about-readline { display: none; }

/* --- 首屏 --- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(36px, 7vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4.5vw, 52px);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 15ch;
  font-size: var(--fs-2xl);
  font-weight: 250;
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__text {
  margin: 20px 0 0;
  max-width: 38ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mute);
}

.page-about .about-hero__text + .about-hero__text { margin-top: 12px; }

.page-about .about-hero__panel {
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-panel-title {
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--mute);
}

.page-about .about-status {
  margin-top: 14px;
  display: grid;
  gap: 0;
}

.page-about .about-status .status__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-status .status__row:first-child { border-top: 0; padding-top: 4px; }

.page-about .about-status .status__key {
  flex: 0 0 auto;
  font-size: var(--fs-sm);
  color: var(--mute-dim);
}

.page-about .about-status .status__val {
  font-size: var(--fs-sm);
  color: var(--white);
  text-align: right;
}

/* --- 章节通用 --- */
.page-about .about-sec {
  position: relative;
  padding: clamp(44px, 7vw, 108px) 0;
}

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

.page-about .about-sec--alt::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 70% at 88% 0%, var(--grid), transparent 62%);
}

.page-about .about-head { margin-bottom: clamp(20px, 3vw, 34px); }
.page-about .about-head .section-title { color: var(--white); }

.page-about .about-body { max-width: 40em; }
.page-about .about-body p {
  margin: 0 0 16px;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mute);
}
.page-about .about-body p:last-child { margin-bottom: 0; }
.page-about .about-body--after { margin-top: clamp(22px, 3.5vw, 36px); }

/* --- 图文分栏 --- */
.page-about .about-split {
  display: grid;
  gap: clamp(28px, 4.5vw, 60px);
}

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

/* --- 图片容器 --- */
.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hair);
  background: var(--ink-700);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-frame--slant { clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%); }

.page-about .media-figure__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  color: var(--mute-dim);
}

/* --- 改版前后对照 --- */
.page-about .about-compare {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 4vw, 42px);
  border: 1px solid var(--hair);
  background: var(--hair);
}

.page-about .about-compare__col {
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink-800);
}

.page-about .about-compare__col--new {
  background: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-about .about-compare__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--mute-dim);
}

.page-about .about-compare__big {
  margin: 12px 0 10px;
  font-size: var(--fs-lg);
  font-weight: 300;
  line-height: 1.1;
  color: var(--white);
}

.page-about .about-compare__col--new .about-compare__big { color: var(--cyan); }

.page-about .about-compare__col p:last-child {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--mute);
}

/* --- 时间线 --- */
.page-about .about-timeline-wrap {
  display: grid;
  gap: clamp(28px, 4.5vw, 56px);
  margin-top: clamp(8px, 2vw, 20px);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 6px 0 0 44px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 9px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(59, 240, 210, .18) 58%, rgba(255, 138, 61, .45) 100%);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(28px, 4.5vw, 46px);
}

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

.page-about .about-node__dot {
  position: absolute;
  left: -44px;
  top: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  box-shadow: 0 0 0 5px var(--ink-800);
}

.page-about .about-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-node__title {
  margin: 8px 0 8px;
  font-size: var(--fs-md);
  font-weight: 400;
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mute);
}

.page-about .about-node__note {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--mute-dim);
  transition: max-height .32s var(--about-note-ease), opacity .24s var(--about-note-ease), margin-top .3s var(--about-note-ease);
}

.page-about .about-node:hover .about-node__note,
.page-about .about-node:focus-within .about-node__note {
  max-height: 6em;
  opacity: 1;
  margin-top: 10px;
}

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

/* --- 团队三条工作线 --- */
.page-about .about-team {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .about-tag {
  padding: clamp(20px, 3vw, 30px);
  border-top: 2px solid var(--cyan);
}

.page-about .about-tag--b { border-top-color: var(--orange); }
.page-about .about-tag--c { border-top-color: var(--hair-strong); }

.page-about .about-tag__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--mute-dim);
}

.page-about .about-tag__title {
  margin: 10px 0 14px;
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--white);
}

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

.page-about .about-tag__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 9px;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--mute);
}

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

.page-about .about-tag__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-tag--b .about-tag__list li::before { background: var(--orange); }
.page-about .about-tag--c .about-tag__list li::before { background: var(--hair-strong); }

.page-about .about-team__fig {
  margin: clamp(26px, 4.5vw, 52px) 0 0;
}

/* --- 四条服务主张 --- */
.page-about .about-claims {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-claim {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 3vw, 32px) 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-claim:last-child { border-bottom: 1px solid var(--hair); }

.page-about .about-claim__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 400;
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--ink-600);
  transition: color .16s var(--about-note-ease);
}

.page-about .about-claim:hover .about-claim__num,
.page-about .about-claim:focus-within .about-claim__num { color: var(--cyan); }

.page-about .about-claim__title {
  margin: 0 0 8px;
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--white);
}

.page-about .about-claim__text {
  margin: 0;
  max-width: 38em;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mute);
}

/* --- 覆盖与访问结构 --- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  border: 1px solid var(--hair);
  background: var(--hair);
}

.page-about .about-stat {
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink-800);
}

.page-about .about-stat__num {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 250;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-stat__label {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--mute);
}

/* --- 接着看这些 --- */
.page-about .about-next {
  display: grid;
  gap: 1px;
  border: 1px solid var(--hair);
  background: var(--hair);
}

.page-about .about-next__item {
  display: grid;
  gap: 6px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink-800);
  text-decoration: none;
  transition: background .16s var(--about-note-ease);
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible { background: var(--ink-700); }

.page-about .about-next__num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-next__title {
  display: block;
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--white);
  transition: color .16s var(--about-note-ease);
}

.page-about .about-next__item:hover .about-next__title,
.page-about .about-next__item:focus-visible .about-next__title { color: var(--cyan); }

.page-about .about-next__text {
  display: block;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--mute);
}

/* --- 屏幕适配 --- */
@media (min-width: 640px) {
  .page-about .about-compare { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 760px) {
  .page-about .about-claim {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 4px 32px;
    align-items: baseline;
  }

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

  .page-about .about-next { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .about-next__item:last-child { grid-column: 1 / -1; }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-split__fig { margin-top: 10px; }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: repeat(12, 1fr);
    align-items: start;
  }

  .page-about .about-tag--a { grid-column: 1 / span 7; }
  .page-about .about-tag--b { grid-column: 8 / span 5; margin-top: 44px; }
  .page-about .about-tag--c { grid-column: 3 / span 6; margin-top: 22px; }

  .page-about .about-team__fig {
    width: 58%;
    margin-left: auto;
  }

  .page-about .about-body { max-width: 36em; }
}

@media (min-width: 1100px) {
  .page-about .about-readline {
    display: block;
    position: fixed;
    top: 20vh;
    right: clamp(14px, 2vw, 30px);
    width: 1px;
    height: 56vh;
    background: var(--about-hair-soft);
    z-index: 3;
    pointer-events: none;
  }

  .page-about .about-readline__fill {
    display: block;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--cyan), rgba(59, 240, 210, 0));
    transform: scaleY(0);
    transform-origin: top center;
  }

  @supports (animation-timeline: scroll(root)) {
    .page-about .about-readline__fill {
      animation: about-readline-grow linear both;
      animation-timeline: scroll(root);
    }
  }
}

@keyframes about-readline-grow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

/* 触屏与窄屏：时间线注解始终可见 */
@media (hover: none), (max-width: 899px) {
  .page-about .about-node__note {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__note,
  .page-about .about-claim__num,
  .page-about .about-next__item,
  .page-about .about-next__title { transition: none; }

  .page-about .about-readline__fill { animation: none; transform: scaleY(1); }
}
</<PAGE_CSS>>>