/* ================= 品牌故事页 · 页面专属样式 ================= */
.page-about {
  --page-timeline-line: linear-gradient(180deg, var(--safety-orange) 0%, var(--neon-lime) 100%);
}

.page-about section[id] {
  scroll-margin-top: 5rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4.5rem) 0 3.5rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 62%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.10) 0%, rgba(213, 255, 0, 0.03) 100%);
  clip-path: polygon(0 0, 70% 0, 42% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumbs {
  position: relative;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  align-items: center;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-slate);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 2.25rem;
  height: 2px;
  background: linear-gradient(90deg, var(--safety-orange), var(--neon-lime));
}

.page-about .about-hero h1 {
  margin: 0 0 0.875rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ice-blue);
}

.page-about .about-hero__site {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--neon-lime);
}

.page-about .about-hero__lead {
  margin: 0 0 1.5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  line-height: 1.6;
  color: var(--ice-blue);
}

.page-about .about-hero__descr {
  margin: 0 0 2rem;
  max-width: 46rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted-slate);
}

.page-about .about-hero__img {
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 900;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 26px 60px rgba(0, 0, 0, 0.4);
}

/* ---------- 页内目录 ---------- */
.page-about .about-toc {
  padding: 1.25rem 0;
  background: var(--ink-800);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.625rem 1rem;
}

.page-about .about-toc__list a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ice-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.page-about .about-toc__list a:hover {
  color: var(--neon-lime);
  border-color: rgba(213, 255, 0, 0.4);
}

/* ---------- 章节通用编辑标头 ---------- */
.page-about .about-creed__overline,
.page-about .about-architecture__overline,
.page-about .about-timeline__overline,
.page-about .about-operator__overline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--safety-orange);
}

.page-about .about-creed__overline::before,
.page-about .about-architecture__overline::before,
.page-about .about-timeline__overline::before,
.page-about .about-operator__overline::before {
  content: "";
  width: 1.75rem;
  height: 2px;
  background: linear-gradient(90deg, var(--safety-orange), var(--neon-lime));
}

.page-about .about-creed h2,
.page-about .about-architecture h2,
.page-about .about-timeline h2,
.page-about .about-operator h2 {
  margin: 0 0 1.5rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.65rem, 3.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--ice-blue);
}

/* ---------- 01 胜势由我 ---------- */
.page-about .about-creed {
  padding: clamp(3rem, 7vw, 6rem) 0 1rem;
}

.page-about .about-creed__lead {
  margin: 0 0 1.5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  line-height: 1.65;
  color: var(--neon-lime);
}

.page-about .about-creed p {
  margin: 0 0 1.25rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted-slate);
}

.page-about .about-creed__note {
  position: relative;
  margin: 2rem 0 0;
  padding: 1.25rem 1.5rem 1.25rem 1.75rem;
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--safety-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .about-creed__note p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ice-blue);
}

/* ---------- 02 从数据流到信息建筑 ---------- */
.page-about .about-architecture {
  position: relative;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(30, 52, 72, 0.35) 50%, transparent 100%);
}

.page-about .about-architecture__header {
  margin-bottom: 2rem;
}

.page-about .about-architecture__intro,
.page-about .about-timeline__intro {
  margin: 0;
  max-width: 42rem;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted-slate);
}

.page-about .about-architecture__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

.page-about .about-architecture__body p {
  margin: 0 0 1.25rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted-slate);
}

.page-about .about-architecture__body a {
  color: var(--neon-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(213, 255, 0, 0.3);
  transition: border-color var(--transition);
}

.page-about .about-architecture__body a:hover {
  border-color: var(--neon-lime);
}

.page-about .about-architecture__img {
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 1000;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.35);
}

.page-about .about-architecture__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.25rem;
}

.page-about .about-architecture__stat {
  padding: 1.25rem 1rem;
  text-align: center;
  background: rgba(11, 22, 34, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

.page-about .about-architecture__stat .stat-num {
  display: block;
  margin-bottom: 0.375rem;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--neon-lime);
}

.page-about .about-architecture__stat-label {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--muted-slate);
}

/* ---------- 03 发展历程 ---------- */
.page-about .about-timeline {
  padding: clamp(3rem, 7vw, 5.5rem) 0 1rem;
}

.page-about .about-timeline__banner {
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 700;
  object-fit: cover;
  margin: 2rem 0 0;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0.375rem;
  bottom: 0.375rem;
  width: 2px;
  transform: translateX(-50%);
  background: var(--page-timeline-line);
  opacity: 0.5;
  border-radius: 2px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2.25rem;
  margin-bottom: 2rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0.375rem;
  width: 0.5rem;
  height: 0.5rem;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--safety-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.14);
}

.page-about .about-timeline__code {
  position: relative;
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.3125rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--neon-lime);
  background: rgba(213, 255, 0, 0.08);
  border: 1px solid rgba(213, 255, 0, 0.18);
  border-radius: 999px;
  cursor: default;
}

.page-about .about-timeline__code:focus-visible {
  outline: 2px solid var(--neon-lime);
  outline-offset: 3px;
}

.page-about .about-timeline__tip {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%) translateY(-0.25rem);
  padding: 0.375rem 0.625rem;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.75rem;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--ice-blue);
  background: var(--ink-600);
  border-radius: var(--radius-sm);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 6;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.page-about .about-timeline__code:hover .about-timeline__tip,
.page-about .about-timeline__code:focus-visible .about-timeline__tip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.page-about .about-timeline__card {
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
}

.page-about .about-timeline__card h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--ice-blue);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted-slate);
}

/* ---------- 04 运营主体与联系方式 ---------- */
.page-about .about-operator {
  padding: clamp(3rem, 7vw, 5rem) 0 4.5rem;
}

.page-about .about-operator__card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 4vw, 3rem);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
}

.page-about .about-operator__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--page-timeline-line);
}

.page-about .about-operator__intro {
  margin: 0 0 1.75rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--muted-slate);
}

.page-about .about-operator__contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0 0 1.75rem;
}

.page-about .about-operator__contact-item {
  padding: 0.875rem 1rem;
  background: rgba(11, 22, 34, 0.5);
  border-left: 2px solid rgba(255, 107, 53, 0.6);
  border-radius: var(--radius-md);
}

.page-about .about-operator__contact dt {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-slate);
}

.page-about .about-operator__contact dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ice-blue);
  word-break: break-word;
}

.page-about .about-operator__note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--muted-slate);
}

.page-about .about-operator__note a {
  color: var(--neon-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(213, 255, 0, 0.3);
  transition: border-color var(--transition);
}

.page-about .about-operator__note a:hover {
  border-color: var(--neon-lime);
}

/* ---------- 桌面端栅格收束 ---------- */
@media (min-width: 720px) {
  .page-about .about-toc__list {
    grid-template-columns: repeat(4, 1fr);
    gap: 0 2rem;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
  }

  .page-about .about-architecture__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 4.5rem 1fr;
    gap: 1.5rem;
    align-items: start;
  }

  .page-about .about-timeline__code {
    margin-top: 1.25rem;
    margin-bottom: 0;
    justify-self: start;
  }
}