.page-about {
  --about-gold: #C9A86A;
  --about-blue: #1B6B8A;
  --about-purple: #4A3B77;
  --about-dark: #0A0E14;
  --about-deep: #070A0F;
  --about-panel: #0F2C33;
  --about-text: #F1EBDD;
  --about-muted: #8A93A3;
  --about-wine: #7A2E3A;
  --about-success: #5BC0BE;
  --about-ease: cubic-bezier(0.22, 1, 0.36, 1);
  background: var(--about-dark);
  color: var(--about-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .container {
  margin-inline: auto;
}

/* ---------- Hero 首屏档案封面 ---------- */
.page-about .about-hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 96px 0 28px;
  background: var(--about-deep);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.48;
  max-width: 100%;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(7, 10, 15, 0.2) 0%, rgba(10, 14, 20, 0.12) 36%, rgba(10, 14, 20, 0.94) 100%),
    radial-gradient(96% 62% at 76% 10%, rgba(27, 107, 138, 0.28) 0%, transparent 62%),
    linear-gradient(115deg, rgba(27, 107, 138, 0.12) 0%, transparent 40%);
}

.page-about .about-hero__content {
  position: relative;
  z-index: 2;
  padding-top: 40px;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding-left: 14px;
  border-left: 2px solid var(--about-gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--about-gold);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__title {
  max-width: 780px;
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 9vw, 5.4rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  text-shadow: 0 12px 46px rgba(0, 0, 0, 0.5);
  transform: skewX(-5deg);
  transform-origin: left center;
}

.page-about .about-hero__lead {
  max-width: 660px;
  margin: 0 0 28px;
  font-size: clamp(0.98rem, 1.6vw, 1.14rem);
  line-height: 1.85;
  color: #DCE1E6;
}

.page-about .about-hero__lead strong {
  color: var(--about-text);
  font-weight: 600;
}

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

.page-about .about-hero__aside {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(201, 168, 106, 0.3);
  padding-top: 18px;
  margin-top: 8px;
}

.page-about .about-hero__file {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--about-muted);
  border: 1px solid rgba(139, 150, 163, 0.4);
  border-radius: 999px;
  padding: 7px 14px;
}

.page-about .about-hero__code {
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.35;
  text-align: right;
  color: var(--about-gold);
  letter-spacing: 0.12em;
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 44px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.page-about .about-hero__stat {
  padding: 18px 22px;
  background: rgba(10, 14, 20, 0.62);
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--about-gold);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--about-muted);
  letter-spacing: 0.06em;
}

/* ---------- 吸顶章节目录 ---------- */
.page-about .about-toc {
  position: sticky;
  top: 84px;
  z-index: 50;
  display: flex;
  justify-content: center;
  margin-top: -36px;
  pointer-events: none;
}

.page-about .about-toc__inner {
  pointer-events: auto;
  display: flex;
  gap: 4px;
  max-width: 100%;
  padding: 6px 10px;
  border: 1px solid rgba(201, 168, 106, 0.28);
  border-radius: 999px;
  background: rgba(7, 10, 15, 0.82);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: block;
  padding: 10px 18px;
  border-radius: 999px;
  white-space: nowrap;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--about-muted);
  transition: color 0.35s var(--about-ease), background 0.35s var(--about-ease);
}

.page-about .about-toc__link:hover {
  color: var(--about-text);
  background: rgba(27, 107, 138, 0.22);
}

.page-about .about-toc__link:focus-visible {
  outline: 2px solid var(--about-gold);
  outline-offset: 2px;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(72px, 9vw, 130px) 0;
  background: var(--about-dark);
}

.page-about .about-section--alt {
  background:
    radial-gradient(90% 70% at 90% 0%, rgba(27, 107, 138, 0.18) 0%, transparent 55%),
    linear-gradient(140deg, #0D2329 0%, #0A0E14 70%);
}

.page-about .about-section__index {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 26px;
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: rgba(201, 168, 106, 0.34);
}

.page-about .about-section__index span {
  font-size: clamp(1rem, 2vw, 1.4rem);
  letter-spacing: 0.02em;
  color: rgba(139, 150, 163, 0.52);
}

.page-about .about-section__index--inline {
  display: inline-flex;
  margin-bottom: 36px;
  padding: 10px 18px 10px 16px;
  border: 1px solid rgba(139, 150, 163, 0.24);
  border-left: 3px solid var(--about-gold);
  border-radius: 0 999px 999px 0;
  background: rgba(15, 44, 51, 0.35);
  transform: skewX(-6deg);
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
}

.page-about .about-section__index--inline span {
  font-size: clamp(0.82rem, 1.4vw, 1rem);
}

.page-about .about-section .section__eyebrow {
  color: var(--about-gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about .about-section .section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  letter-spacing: -0.02em;
  transform: skewX(-3deg);
  transform-origin: left center;
}

.page-about .about-section .section__desc {
  max-width: 620px;
  margin: 0;
  color: var(--about-muted);
  font-size: 0.96rem;
  line-height: 1.8;
}

/* ---------- 01 品牌定位 ---------- */
.page-about .about-intro__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-intro__text {
  margin-top: 14px;
}

.page-about .about-intro__text p {
  max-width: 760px;
  margin: 0 0 16px;
  font-size: 0.98rem;
  line-height: 1.9;
  color: #C9CED4;
}

.page-about .about-intro__text strong {
  color: var(--about-text);
}

.page-about .about-intro__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}

.page-about .about-intro__list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 20px;
  border-radius: 16px;
  background: rgba(15, 44, 51, 0.5);
  border-left: 3px solid var(--about-gold);
  font-size: 0.92rem;
  line-height: 1.7;
  color: #C9CED4;
}

.page-about .about-intro__list li span {
  flex: 0 0 auto;
  min-width: 64px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--about-gold);
}

.page-about .about-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 02 核心服务能力 ---------- */
.page-about .about-capability__header {
  margin-bottom: 20px;
}

.page-about .about-capability__bg {
  position: relative;
  max-height: 320px;
  margin: 28px 0 36px;
  border-radius: 28px;
  overflow: hidden;
}

.page-about .about-capability__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 320px;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.08);
}

.page-about .about-capability__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-capability__card {
  position: relative;
  padding: 26px 22px 24px;
  border: 1px solid rgba(139, 150, 163, 0.14);
  border-radius: 24px;
  background: linear-gradient(155deg, rgba(15, 44, 51, 0.88) 0%, rgba(7, 10, 15, 0.96) 100%);
  transition: transform 0.45s var(--about-ease), border-color 0.45s var(--about-ease), box-shadow 0.45s var(--about-ease);
}

.page-about .about-capability__card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 26px;
  width: 46px;
  height: 8px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--about-blue), var(--about-purple));
}

.page-about .about-capability__card:hover {
  transform: translateY(-6px);
  border-color: rgba(27, 107, 138, 0.55);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.38), 0 0 0 1px rgba(27, 107, 138, 0.16);
}

.page-about .about-capability__icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 18px;
  border-radius: 16px;
  background: rgba(27, 107, 138, 0.16);
  color: var(--about-success);
}

.page-about .about-capability__icon svg {
  width: 28px;
  height: 28px;
}

.page-about .about-capability__card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--about-text);
}

.page-about .about-capability__card p {
  margin: 0 0 16px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .about-capability__card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--about-gold);
  transition: gap 0.3s var(--about-ease);
}

.page-about .about-capability__card a:hover {
  gap: 10px;
}

/* ---------- 03 发展里程碑 ---------- */
.page-about .about-milestone {
  background:
    radial-gradient(80% 60% at 14% 100%, rgba(74, 59, 119, 0.2) 0%, transparent 55%),
    var(--about-dark);
}

.page-about .about-milestone__media {
  max-height: 420px;
  margin: 30px 0 44px;
  border-radius: 28px;
  overflow: hidden;
}

.page-about .about-milestone__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 420px;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  padding-left: 46px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, rgba(27, 107, 138, 0.08) 0%, rgba(27, 107, 138, 0.72) 18%, rgba(201, 168, 106, 0.72) 82%, rgba(201, 168, 106, 0.08) 100%);
}

.page-about .about-event {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 22px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-event:last-child {
  border-bottom: 0;
}

.page-about .about-event::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-dark);
  border: 2px solid var(--about-gold);
  box-shadow: 0 0 0 5px rgba(201, 168, 106, 0.12);
}

.page-about .about-event__batch {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--about-gold);
}

.page-about .about-event__body h3 {
  margin: 0 0 8px;
  font-size: 1.14rem;
  line-height: 1.4;
  color: var(--about-text);
}

.page-about .about-event__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--about-muted);
}

/* ---------- 04 合规与备案 ---------- */
.page-about .about-compliance__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-compliance__body > p {
  max-width: 760px;
  margin: 14px 0 22px;
  font-size: 0.98rem;
  line-height: 1.9;
  color: #C9CED4;
}

.page-about .about-compliance__meta {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0 0 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  overflow: hidden;
}

.page-about .about-compliance__meta > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 24px;
  background: rgba(15, 44, 51, 0.42);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.page-about .about-compliance__meta > div:last-child {
  border-bottom: 0;
}

.page-about .about-compliance__meta dt {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-muted);
}

.page-about .about-compliance__meta dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--about-text);
}

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

/* ---------- 05 运营理念 ---------- */
.page-about .about-philosophy {
  background:
    radial-gradient(80% 80% at 82% 100%, rgba(74, 59, 119, 0.2) 0%, transparent 55%),
    linear-gradient(140deg, rgba(15, 44, 51, 0.92) 0%, var(--about-dark) 72%);
}

.page-about .about-philosophy__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 38px;
}

.page-about .about-principle {
  position: relative;
  padding: 30px 24px 28px;
  border: 1px solid rgba(201, 168, 106, 0.14);
  border-radius: 24px;
  background: rgba(7, 10, 15, 0.62);
  transition: border-color 0.45s var(--about-ease), transform 0.45s var(--about-ease);
}

.page-about .about-principle:hover {
  transform: translateY(-5px);
  border-color: rgba(27, 107, 138, 0.5);
}

.page-about .about-principle__idx {
  position: absolute;
  top: 20px;
  right: 22px;
  padding: 4px 10px;
  border: 1px solid rgba(201, 168, 106, 0.26);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(201, 168, 106, 0.58);
}

.page-about .about-principle h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.9rem;
  letter-spacing: 0.1em;
  transform: skewX(-6deg);
  color: var(--about-text);
  text-shadow: 0 0 30px rgba(27, 107, 138, 0.32);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .about-philosophy__note {
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--about-muted);
  font-size: 0.94rem;
}

.page-about .about-philosophy__note a {
  color: var(--about-gold);
  text-decoration: none;
  font-weight: 600;
}

/* ---------- 按钮微调 ---------- */
.page-about .btn {
  transition: transform 0.35s var(--about-ease), box-shadow 0.35s var(--about-ease), border-color 0.35s var(--about-ease);
}

.page-about .btn:hover {
  transform: translateY(-2px);
}

.page-about .btn--primary {
  background: linear-gradient(120deg, var(--about-blue), var(--about-purple));
  color: var(--about-text);
  border: 1px solid transparent;
}

/* ---------- 桌面断点 ---------- */
@media (min-width: 680px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

  .page-about .about-compliance__meta > div:nth-child(3) {
    border-bottom: 0;
  }

  .page-about .about-event {
    grid-template-columns: 180px 1fr;
    align-items: baseline;
  }

  .page-about .about-event::before {
    top: 26px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 2fr) minmax(220px, 1fr);
    gap: 64px;
  }

  .page-about .about-hero__aside {
    justify-content: flex-end;
    text-align: right;
    align-items: flex-end;
    flex-direction: column;
    border-top: 0;
    border-right: 1px solid rgba(201, 168, 106, 0.3);
    padding-top: 0;
    padding-right: 18px;
    margin-top: 0;
  }

  .page-about .about-intro__inner,
  .page-about .about-compliance__inner {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .about-milestone__media {
    margin-left: auto;
    margin-right: auto;
    width: 100%;
  }
}

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