/* ===== PAGE-ABOUT：品牌档案 ===== */
.page-about {
  --about-num: clamp(3.4rem, 10vw, 6.5rem);
  --about-gap: clamp(1.5rem, 4vw, 3.5rem);
  --about-radius-lg: 28px;
  --about-radius-md: 20px;
  position: relative;
  background:
    radial-gradient(52rem 30rem at 110% -4%, rgba(30, 76, 143, 0.38), transparent 62%),
    radial-gradient(30rem 22rem at -8% 22%, rgba(198, 255, 73, 0.055), transparent 55%),
    var(--space-900);
  color: var(--steel);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
}

/* ----- 首屏 ----- */
.page-about .about-hero {
  padding: clamp(1.5rem, 5vw, 4.5rem) 0 0;
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(198, 255, 73, 0.35), transparent);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  line-height: 0.93;
  letter-spacing: 0.01em;
  margin: 1.1rem 0 1.4rem;
  max-width: 12ch;
  text-wrap: balance;
  position: relative;
}

.page-about .about-hero__title::before {
  content: "";
  display: inline-block;
  width: 0.38em;
  height: 0.95em;
  margin-right: 0.3em;
  background: var(--grad-b);
  transform: skewY(-8deg);
  border-radius: 99px;
  vertical-align: -0.08em;
}

.page-about .about-hero__lead {
  max-width: 66ch;
  color: var(--misty);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--glass);
}

.page-about .about-hero__chapters a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--misty);
  font-size: 0.85rem;
  text-decoration: none;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--glass);
  border-radius: var(--radius-pill);
  transition: border-color 0.3s, color 0.3s;
}

.page-about .about-hero__chapters a span {
  font-family: var(--font-mono);
  color: var(--neon);
  font-size: 0.75rem;
}

.page-about .about-hero__chapters a:hover,
.page-about .about-hero__chapters a:focus-visible {
  border-color: rgba(198, 255, 73, 0.45);
  color: var(--steel);
  outline: none;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: 0;
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
  background: var(--grad-a);
  aspect-ratio: 3 / 2;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 52%, rgba(8, 18, 42, 0.45) 100%),
    radial-gradient(circle at 76% 28%, rgba(198, 255, 73, 0.18), transparent 55%);
  pointer-events: none;
}

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

/* ----- 章节通用骨架 ----- */
.page-about .about-section {
  padding: clamp(3.5rem, 7vw, 7rem) 0;
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
  position: relative;
}

.page-about .about-section__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-section__index {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  border-bottom: 2px solid var(--glass);
  padding-bottom: 0.7rem;
}

.page-about .about-section__num {
  font-family: var(--font-heading);
  font-size: var(--about-num);
  line-height: 0.82;
  color: var(--neon);
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(198, 255, 73, 0.2);
}

.page-about .about-section__caption {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--misty);
  padding-bottom: 0.25rem;
  text-transform: uppercase;
}

.page-about .about-section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
  margin: 1rem 0 1.2rem;
  text-wrap: balance;
}

.page-about .about-section__body > p {
  color: var(--misty);
  max-width: 68ch;
}

.page-about .about-section:target {
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.055), transparent 60%);
}

/* ----- 01 品牌定位原则卡 ----- */
.page-about .about-principles {
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.page-about .about-principles__item {
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--about-radius-md);
  padding: 1.3rem;
  border-left: 3px solid var(--neon);
}

.page-about .about-principles__item p {
  margin: 0.6rem 0 0;
  color: var(--misty);
  font-size: 0.95rem;
}

/* ----- 02 数据与覆盖 ----- */
.page-about .about-data::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(30, 76, 143, 0.3), transparent 55%, rgba(198, 255, 73, 0.05)),
    repeating-linear-gradient(90deg, rgba(155, 179, 208, 0.06) 0 1px, transparent 1px 72px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
  margin: 2.2rem 0 0;
}

.page-about .about-stat {
  background: linear-gradient(160deg, rgba(14, 30, 63, 0.82), rgba(8, 18, 42, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--about-radius-md);
  padding: 1.6rem 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 0.4rem;
  place-items: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-stat::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--grad-b);
  opacity: 0.7;
}

.page-about .about-stat:hover {
  transform: translateY(-4px);
  border-color: rgba(198, 255, 73, 0.28);
}

.page-about .about-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
}

.page-about .about-stat__label {
  color: var(--misty);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.page-about .about-data__media {
  margin: 2.2rem 0 0;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  position: relative;
  aspect-ratio: 10 / 7;
}

.page-about .about-data__media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(120deg, rgba(8, 18, 42, 0.3), transparent 42%, rgba(8, 18, 42, 0.55)),
    radial-gradient(circle at 76% 30%, rgba(198, 255, 73, 0.2), transparent 56%);
  pointer-events: none;
}

/* ----- 03 内容频道 ----- */
.page-about .about-editorial__layout {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.2rem;
}

.page-about .about-editorial__list {
  display: grid;
  gap: 1rem;
}

.page-about .about-editorial__item {
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--about-radius-md);
  padding: 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-editorial__item:hover,
.page-about .about-editorial__item:focus-within {
  transform: translateY(-4px);
  border-color: rgba(198, 255, 73, 0.36);
}

.page-about .about-editorial__item h3 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  line-height: 1.1;
  margin: 0.7rem 0 0.5rem;
}

.page-about .about-editorial__item p {
  color: var(--misty);
  font-size: 0.94rem;
  margin: 0;
}

.page-about .about-editorial__media {
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
}

.page-about .about-editorial__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, transparent 62%, rgba(8, 18, 42, 0.55) 100%);
  pointer-events: none;
}

/* ----- 04 发展里程碑时间轴 ----- */
.page-about .about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(46rem 20rem at 20% 20%, rgba(30, 76, 143, 0.22), transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 1.6rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--deep-600), var(--orange));
  opacity: 0.35;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2.6rem;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--space-900);
  border: 3px solid var(--neon);
  box-shadow: 0 0 14px rgba(198, 255, 73, 0.55);
}

.page-about .about-timeline__card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--about-radius-md);
  padding: 1.5rem;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.1;
  margin: 0.65rem 0 0.45rem;
}

.page-about .about-timeline__card p {
  color: var(--misty);
  font-size: 0.95rem;
  margin: 0;
}

.page-about .about-app {
  margin-top: 2.2rem;
  padding: 1.8rem;
  background: linear-gradient(140deg, rgba(30, 76, 143, 0.3), rgba(8, 18, 42, 0.8));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--about-radius-lg);
  display: grid;
  gap: 0.8rem;
}

.page-about .about-app p {
  max-width: 60ch;
  color: var(--steel);
  margin: 0;
}

.page-about .about-app .btn {
  justify-self: start;
  margin-top: 0.4rem;
}

/* ----- 底部信任玻璃卡 ----- */
.page-about .about-trust {
  padding: clamp(1rem, 3vw, 2.5rem) 0 clamp(3.5rem, 8vw, 6.5rem);
}

.page-about .about-trust__card {
  display: grid;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3.8rem);
  border-radius: var(--about-radius-lg);
  position: relative;
  overflow: hidden;
}

.page-about .about-trust__card::before {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 255, 73, 0.16), transparent 63%);
  pointer-events: none;
}

.page-about .about-trust__title {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.06;
  margin: 0.6rem 0 0.8rem;
  max-width: 14ch;
}

.page-about .about-trust__text {
  color: var(--misty);
  max-width: 64ch;
}

.page-about .about-trust__support {
  margin-top: 1.2rem;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.page-about .about-trust__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-trust__links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--neon);
  font-size: 0.9rem;
  text-decoration: none;
  padding: 0.55rem 1rem;
  border: 1px solid rgba(198, 255, 73, 0.28);
  border-radius: var(--radius-pill);
  transition: background 0.25s, border-color 0.25s, color 0.25s;
}

.page-about .about-trust__links a:hover,
.page-about .about-trust__links a:focus-visible {
  background: rgba(198, 255, 73, 0.12);
  border-color: rgba(198, 255, 73, 0.55);
  color: var(--steel);
  outline: none;
}

/* ----- 桌面端媒体查询 ----- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: clamp(2.5rem, 6vw, 5.5rem);
  }

  .page-about .about-hero__media {
    clip-path: polygon(12% 0, 100% 0, 100% 86%, 0 100%);
  }

  .page-about .about-section__grid {
    grid-template-columns: 240px 1fr;
    gap: clamp(2.5rem, 6vw, 5.5rem);
  }

  .page-about .about-section__index {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    border-bottom: 0;
    padding-bottom: 0;
    border-left: 2px solid var(--glass);
    padding-left: 1.2rem;
    margin-top: 0.3rem;
  }

  .page-about .about-section__caption {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

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

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

  .page-about .about-stat {
    padding: 2rem 1.2rem;
  }

  .page-about .about-editorial__layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 1.8rem;
    align-items: start;
  }

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

  .page-about .about-editorial__item:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), var(--deep-600), var(--orange));
    opacity: 0.35;
  }

  .page-about .about-timeline__item {
    padding-left: 0;
    padding-top: 2.6rem;
  }

  .page-about .about-timeline__dot {
    left: 0;
    top: 0;
  }

  .page-about .about-trust__card {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .page-about .about-trust__links {
    max-width: 280px;
    justify-content: flex-end;
  }
}

/* ----- 滚动驱动增强：仅在不牺牲可读性的前提下生效 ----- */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .page-about .about-timeline__item,
    .page-about .about-stat,
    .page-about .about-editorial__item {
      animation: about-section-reveal both linear;
      animation-timeline: view();
      animation-range: entry 5% entry 30%;
    }
  }
}

@keyframes about-section-reveal {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}