/* ================= 品牌主张页 · 页面专属样式 ================= */

.page-about {
  display: block;
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .about-hero,
.page-about .about-chapter,
.page-about .about-next {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 34px 0 68px;
  background:
    radial-gradient(125% 95% at 82% -10%, rgba(27, 58, 92, 0.92), rgba(11, 30, 51, 0) 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink) 100%);
  border-bottom: 2px solid var(--ink-3);
  overflow: hidden;
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 184, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.13) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(90% 72% at 74% 12%, #000 0%, transparent 74%);
  mask-image: radial-gradient(90% 72% at 74% 12%, #000 0%, transparent 74%);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .breadcrumbs {
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--mist);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(143, 163, 184, 0.55);
}

.page-about .breadcrumb-link {
  color: var(--perf);
  text-decoration: none;
  border-bottom: 1px dashed rgba(216, 208, 192, 0.4);
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-about .about-hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: center;
  margin-top: 26px;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  padding: 6px 14px 6px 11px;
  border: 1px solid rgba(143, 163, 184, 0.32);
  border-radius: var(--radius-pill);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mist);
  background: rgba(19, 44, 71, 0.55);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-size: clamp(42px, 12vw, 78px);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--score);
  text-shadow: 0 0 42px rgba(255, 197, 61, 0.22);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 42em;
  font-size: 17px;
  line-height: 1.85;
  color: #C8D3DF;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 3px solid var(--perf);
  border-radius: 8px;
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .media__court {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 184, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.2) 1px, transparent 1px);
  background-size: 46px 46px;
  mix-blend-mode: screen;
  opacity: 0.75;
}

.page-about .media__grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.05) 0 1px,
    transparent 1px 3px
  );
  mix-blend-mode: overlay;
}

.page-about .media__frame-no {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(11, 30, 51, 0.78);
  color: var(--score);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.page-about .media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 26px 16px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(11, 30, 51, 0) 0%, rgba(11, 30, 51, 0.88) 68%);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  background: var(--ink-2);
  border-bottom: 2px solid var(--ink-3);
  padding: 14px 0;
}

.page-about .about-index__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 8px 16px;
  border: 1px solid rgba(143, 163, 184, 0.28);
  border-radius: var(--radius-pill);
  color: #C8D3DF;
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--signal);
  color: var(--paper);
  background: rgba(255, 106, 26, 0.12);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 62px 0 72px;
}

.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--brown);
}

.page-about .about-chapter--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-chapter--ink::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 184, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.07) 1px, transparent 1px);
  background-size: 96px 96px;
}

.page-about .about-chapter > .shell {
  position: relative;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 30px;
}

.page-about .about-chapter__ann {
  flex: 0 0 auto;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin: 4px 0 0;
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-chapter--paper .about-chapter__ann {
  color: rgba(43, 33, 24, 0.42);
}

.page-about .about-chapter__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--signal);
}

.page-about .about-chapter__title {
  margin: 0;
  max-width: 18em;
  font-size: clamp(27px, 5.6vw, 44px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.012em;
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--brown);
}

.page-about .about-chapter__lede {
  margin: 0 0 34px;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(244, 236, 221, 0.72);
}

.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.92;
}

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

.page-about .about-chapter--paper .about-prose p {
  color: #3B2E22;
}

.page-about .about-chapter--ink .about-prose p {
  color: rgba(244, 236, 221, 0.8);
}

.page-about .about-lede {
  font-size: 19px !important;
  line-height: 1.72 !important;
  font-weight: 700;
}

.page-about .about-chapter--paper .about-lede {
  color: var(--brown);
}

.page-about .about-chapter--ink .about-lede {
  color: var(--paper);
}

/* ---------- 引文块 ---------- */
.page-about .about-pullquote {
  position: relative;
  align-self: start;
  padding: 30px 24px 26px;
  background: var(--ink);
  color: var(--paper);
  border: 3px solid var(--brown);
  box-shadow: var(--shadow-paper);
}

.page-about .about-pullquote__mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 52px;
  line-height: 0.7;
  color: var(--signal);
}

.page-about .about-pullquote__text {
  margin: 14px 0 0;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.page-about .about-pullquote__by {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(216, 208, 192, 0.35);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--signal) 0%, rgba(255, 106, 26, 0.1) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid rgba(143, 163, 184, 0.2);
  border-radius: var(--radius-card);
  background: rgba(19, 44, 71, 0.6);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  transform: translateX(6px);
  border-color: rgba(255, 106, 26, 0.55);
  background: rgba(19, 44, 71, 0.95);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -26px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--signal);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--signal);
}

.page-about .about-timeline__stage {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--score);
}

.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(244, 236, 221, 0.78);
}

/* ---------- 图片区 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  border: 3px solid var(--brown);
  border-radius: 8px;
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: var(--shadow-paper);
}

.page-about .about-chapter--ink .about-figure {
  border-color: var(--perf);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.6);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-figure .media__caption {
  position: static;
  padding: 12px 16px 14px;
  background: var(--brown);
  color: var(--paper);
}

/* ---------- 内容三步 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  padding: 22px 20px 20px;
  border: 2px solid var(--brown);
  border-radius: var(--radius-card);
  background: #FBF5E9;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .about-flow__step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-paper);
}

.page-about .about-flow__no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--score);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .about-flow__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--brown);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #4A3B2C;
}

/* ---------- 指标带 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink-3);
}

.page-about .about-metrics__item {
  padding: 20px 4px;
  border-bottom: 2px solid var(--ink-3);
}

.page-about .about-metrics__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--score);
}

.page-about .about-metrics__label {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 236, 221, 0.74);
}

/* ---------- 荣誉卡 ---------- */
.page-about .about-honor {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-content: start;
}

.page-about .about-honor__card {
  padding: 20px 18px;
  background: #FBF5E9;
  border: 2px solid var(--brown);
  color: var(--brown);
}

.page-about .about-honor__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-about .about-honor__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .about-honor__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #4A3B2C;
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  position: relative;
  padding: 58px 0 64px;
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
  border-top: 2px solid var(--ink-3);
  color: var(--paper);
}

.page-about .about-next__title {
  margin: 0 0 12px;
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-about .about-next__lede {
  margin: 0 0 32px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 236, 221, 0.72);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-next__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no label"
    "no desc";
  column-gap: 16px;
  align-items: center;
  padding: 18px 18px;
  border: 2px solid rgba(143, 163, 184, 0.26);
  border-radius: var(--radius-card);
  background: rgba(11, 30, 51, 0.6);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--signal);
  background: rgba(255, 106, 26, 0.1);
  transform: translateY(-3px);
}

.page-about .about-next__no {
  grid-area: no;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  color: var(--signal);
}

.page-about .about-next__label {
  grid-area: label;
  font-size: 17px;
  font-weight: 800;
}

.page-about .about-next__desc {
  grid-area: desc;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.66;
  color: rgba(244, 236, 221, 0.66);
}

.page-about .about-next__foot {
  margin: 34px 0 0;
}

.page-about .about-next__top {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid rgba(216, 208, 192, 0.34);
  border-radius: var(--radius-pill);
  color: var(--perf);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-about .about-next__top:hover,
.page-about .about-next__top:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.page-about [data-revealed] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-chapter {
    padding: 76px 0 88px;
  }

  .page-about .about-hero {
    padding: 46px 0 84px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

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

  .page-about .about-metrics__item {
    padding: 24px 22px;
    border-right: 2px solid var(--ink-3);
  }

  .page-about .about-metrics__item:nth-child(2n) {
    border-right: 0;
  }

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

  .page-about .about-next__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__layout {
    grid-template-columns: 1.02fr 1fr;
    gap: 54px;
    margin-top: 34px;
  }

  .page-about .about-hero__lede {
    font-size: 18px;
  }

  .page-about .about-body--2 {
    grid-template-columns: 1.12fr 0.88fr;
    gap: 52px;
    align-items: start;
  }

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

  .page-about .about-metrics__item {
    border-right: 2px solid var(--ink-3);
  }

  .page-about .about-metrics__item:nth-child(2n) {
    border-right: 2px solid var(--ink-3);
  }

  .page-about .about-metrics__item:last-child {
    border-right: 0;
  }

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

  .page-about .about-chapter__head {
    gap: 22px;
    margin-bottom: 38px;
  }

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

  .page-about .about-timeline__dot {
    left: -30px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-chapter {
    padding: 88px 0 100px;
  }
}