.page-about {
  --about-gold: #C9A227;
  --about-gold-light: #E5C86B;
  --about-gold-grad: linear-gradient(135deg, #C9A227 0%, #E5C86B 50%, #C9A227 100%);
  --about-cyan: #00E5FF;
  --about-deep: #0A1128;
  --about-night: #1A0B2E;
  --about-white: #F5F5F7;
  --about-gray: #A0A8B8;
  --about-glass: rgba(255, 255, 255, 0.08);
  --about-good: #00FF9D;
  --about-font-title: "Noto Serif SC", "Source Han Serif SC", serif;
  --about-font-body: "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --about-font-mono: "JetBrains Mono", "Fira Code", monospace;
  position: relative;
  overflow-x: clip;
  background: var(--about-deep);
  color: var(--about-white);
  font-family: var(--about-font-body);
  line-height: 1.7;
}

.page-about__bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 85% 10%, rgba(201, 162, 39, 0.14), transparent 42%),
    radial-gradient(ellipse at 5% 42%, rgba(0, 229, 255, 0.07), transparent 38%),
    radial-gradient(ellipse at 90% 78%, rgba(26, 11, 46, 0.55), transparent 48%),
    linear-gradient(180deg, #0a1128 0%, #0a1128 38%, #100b2b 68%, #0a1128 100%);
}

.page-about > section,
.page-about__anchor {
  position: relative;
  z-index: 1;
}

.page-about__hero {
  position: relative;
  padding: 72px 20px 72px;
  min-height: min(820px, 92vh);
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(26, 11, 46, 0.92) 0%, rgba(10, 17, 40, 0.74) 46%, rgba(10, 17, 40, 0.62) 100%),
    url("{zhanqunpic:h:900w:1920}") center/cover no-repeat;
  isolation: isolate;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: url("data:image/svg+xml,%3Csvg width='160' height='120' viewBox='0 0 160 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M28 84 L10 36 L46 56 L80 20 L114 56 L150 36 L132 84 Z' fill='none' stroke='%23C9A227' stroke-opacity='0.07' stroke-width='2'/%3E%3C/svg%3E") repeat 0 0 / 440px auto;
  opacity: 0.5;
}

.page-about__hero-inner {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about__hero-mark {
  display: flex;
  justify-content: flex-start;
}

.page-about__crown {
  width: 148px;
  height: 111px;
  filter: drop-shadow(0 0 22px rgba(201, 162, 39, 0.32));
}

.page-about__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--about-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--about-cyan);
  text-transform: uppercase;
}

.page-about__hero h1 {
  margin: 0 0 20px;
  max-width: 780px;
  font-family: var(--about-font-title);
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0.02em;
  text-wrap: balance;
  background: linear-gradient(120deg, #f5f5f7 10%, #e5c86b 82%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about__lead {
  max-width: 640px;
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 245, 247, 0.82);
}

.page-about__hero-note {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  width: fit-content;
  margin-top: 6px;
  padding: 14px 20px;
  border: 1px solid rgba(229, 200, 107, 0.28);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-about__hero-note p {
  margin: 0;
  font-size: 13px;
  color: var(--about-gray);
}

.page-about__hero-num {
  font-family: var(--about-font-mono);
  font-size: 32px;
  font-weight: 700;
  background: var(--about-gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about__hero-note strong {
  display: block;
  font-family: var(--about-font-title);
  font-size: 16px;
  color: var(--about-white);
  letter-spacing: 0.04em;
}

.page-about__anchor {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  justify-content: center;
  padding: 22px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 17, 40, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.page-about__anchor a {
  font-size: 14px;
  font-weight: 500;
  color: var(--about-gray);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about__anchor a:hover,
.page-about__anchor a:focus-visible {
  color: var(--about-gold-light);
}

.page-about__section {
  padding: 88px clamp(20px, 4vw, 48px) 96px;
}

.page-about__section--philosophy {
  background: linear-gradient(118deg, rgba(26, 11, 46, 0.88) 0%, rgba(10, 17, 40, 0.96) 38%, rgba(10, 17, 40, 0.82) 100%);
}

.page-about__section--journey {
  background: linear-gradient(180deg, rgba(10, 17, 40, 0.96) 0%, rgba(16, 11, 43, 0.98) 50%, rgba(10, 17, 40, 0.94) 100%);
}

.page-about__section--cert {
  background: linear-gradient(135deg, rgba(10, 17, 40, 1) 0%, rgba(26, 11, 46, 0.92) 100%);
}

.page-about__section--method {
  background: linear-gradient(120deg, rgba(10, 17, 40, 1) 0%, rgba(16, 11, 43, 1) 100%);
}

.page-about__section--eco {
  background: linear-gradient(135deg, rgba(26, 11, 46, 0.96) 0%, rgba(10, 17, 40, 0.94) 100%);
}

.page-about__section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 18px;
  align-items: end;
  margin-bottom: 48px;
}

.page-about__section-head--light {
  margin-bottom: 52px;
}

.page-about__index {
  grid-row: 1 / 3;
  font-family: var(--about-font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  background: var(--about-gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.94;
}

.page-about__section-head h2 {
  margin: 0;
  font-family: var(--about-font-title);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--about-white);
}

.page-about__section-lead {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--about-gray);
}

.page-about__philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about__philosophy-item {
  position: relative;
  padding: 30px 28px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-about__philosophy-item:hover {
  transform: translateY(-4px);
  border-color: rgba(229, 200, 107, 0.42);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

.page-about__philosophy-item--major {
  grid-column: 1 / -1;
  background:
    linear-gradient(135deg, rgba(201, 162, 39, 0.14) 0%, rgba(26, 11, 46, 0.14) 100%),
    rgba(255, 255, 255, 0.06);
  border-color: rgba(201, 162, 39, 0.3);
  padding: 42px 30px;
}

.page-about__philosophy-item--major h3 {
  font-family: var(--about-font-title);
  font-size: 28px;
  margin: 8px 0 12px;
  color: var(--about-gold-light);
}

.page-about__philosophy-item--major p {
  margin: 0;
  max-width: 680px;
  font-size: 15px;
}

.page-about__philosophy-tag {
  font-family: var(--about-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--about-cyan);
  text-transform: uppercase;
}

.page-about__philosophy-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--about-font-mono);
  font-size: 28px;
  background: var(--about-gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about__philosophy-item h4 {
  margin: 0 0 10px;
  font-family: var(--about-font-title);
  font-size: 19px;
  color: var(--about-white);
}

.page-about__philosophy-item p {
  margin: 0;
  font-size: 14px;
  color: rgba(245, 245, 247, 0.78);
}

.page-about__journey-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about__journey-media {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.36);
}

.page-about__journey-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
}

.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.6) 0%, rgba(229, 200, 107, 0.7) 78%, rgba(201, 162, 39, 0.16) 100%);
}

.page-about__timeline-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 38px;
}

.page-about__timeline-item:last-child {
  margin-bottom: 0;
}

.page-about__timeline-dot {
  position: absolute;
  left: 6px;
  top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--about-deep);
  border: 3px solid var(--about-gold-light);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.14), 0 0 16px rgba(201, 162, 39, 0.4);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about__timeline-item:hover .page-about__timeline-dot,
.page-about__timeline-item:focus-within .page-about__timeline-dot {
  box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.12), 0 0 24px rgba(0, 229, 255, 0.5);
  transform: scale(1.1);
}

.page-about__timeline-card {
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.page-about__timeline-card:hover {
  border-color: rgba(0, 229, 255, 0.28);
  background: rgba(255, 255, 255, 0.07);
}

.page-about__timeline-year {
  display: inline-block;
  font-family: var(--about-font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-cyan);
  margin-bottom: 8px;
}

.page-about__timeline-card h3 {
  margin: 0 0 8px;
  font-family: var(--about-font-title);
  font-size: 18px;
  color: var(--about-white);
}

.page-about__timeline-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(245, 245, 247, 0.72);
}

.page-about__timeline-item--current .page-about__timeline-card {
  border-color: rgba(201, 162, 39, 0.34);
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.12), rgba(255, 255, 255, 0.03));
}

.page-about__timeline-item--current .page-about__timeline-year {
  color: var(--about-gold-light);
}

.page-about__cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about__cert-card {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid rgba(229, 200, 107, 0.22);
  background: rgba(255, 255, 255, 0.055);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-about__cert-card:hover,
.page-about__cert-card:focus-within {
  transform: translateY(-5px);
  border-color: rgba(229, 200, 107, 0.5);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.3);
}

.page-about__cert-card-img {
  position: relative;
  overflow: hidden;
}

.page-about__cert-card-img img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about__cert-card-img--dark {
  aspect-ratio: 2 / 1;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(201, 162, 39, 0.2), transparent 46%),
    radial-gradient(ellipse at 85% 70%, rgba(0, 229, 255, 0.12), transparent 42%),
    linear-gradient(135deg, #0d1030 0%, #1a0b2e 100%);
}

.page-about__cert-card-img--dark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='120' height='120' viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 80 L8 34 L40 52 L60 18 L80 52 L112 34 L100 80 Z' fill='none' stroke='%23E5C86B' stroke-opacity='0.16' stroke-width='2'/%3E%3C/svg%3E") repeat 0 0 / 180px auto;
}

.page-about__cert-body {
  padding: 24px 24px 28px;
}

.page-about__cert-badge {
  display: inline-block;
  font-family: var(--about-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-gold-light);
  margin-bottom: 10px;
}

.page-about__cert-body h3 {
  margin: 0 0 10px;
  font-family: var(--about-font-title);
  font-size: 20px;
  color: var(--about-white);
  line-height: 1.4;
}

.page-about__cert-body p {
  margin: 0;
  font-size: 14px;
  color: rgba(245, 245, 247, 0.74);
}

.page-about__method-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 34px;
  padding: 28px 22px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 20px;
  background: linear-gradient(120deg, rgba(201, 162, 39, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);
}

.page-about__stat-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about__stat-num {
  font-family: var(--about-font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  background: var(--about-gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.page-about__stat-label {
  font-size: 14px;
  color: rgba(245, 245, 247, 0.72);
}

.page-about__method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about__method-card {
  padding: 30px 26px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about__method-card:hover,
.page-about__method-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.26);
}

.page-about__method-card--dark {
  background:
    radial-gradient(ellipse at 90% 12%, rgba(201, 162, 39, 0.13), transparent 44%),
    rgba(255, 255, 255, 0.045);
  border-color: rgba(201, 162, 39, 0.22);
}

.page-about__method-code {
  display: inline-block;
  font-family: var(--about-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--about-cyan);
  margin-bottom: 14px;
}

.page-about__method-card h3 {
  font-family: var(--about-font-title);
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--about-white);
}

.page-about__method-card > p {
  font-size: 14px;
  margin: 0 0 18px;
  color: rgba(245, 245, 247, 0.76);
}

.page-about__method-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about__method-list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  color: rgba(245, 245, 247, 0.72);
}

.page-about__method-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--about-gold-light);
  box-shadow: 0 0 8px rgba(201, 162, 39, 0.6);
}

.page-about__eco-figure {
  margin: 0 0 30px;
}

.page-about__eco-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
}

.page-about__eco-grid i {
  aspect-ratio: 1.4;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.14), rgba(0, 229, 255, 0.07));
  border: 1px solid rgba(229, 200, 107, 0.2);
  transition: background 0.35s ease, border-color 0.35s ease, transform 0.35s ease;
}

.page-about__eco-grid i:hover {
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.34), rgba(0, 229, 255, 0.14));
  border-color: rgba(229, 200, 107, 0.5);
  transform: scale(1.03);
}

.page-about__eco-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--about-gray);
  text-align: center;
}

.page-about__eco-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 52px;
}

.page-about__eco-card {
  padding: 24px 24px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.page-about__eco-card h3 {
  font-family: var(--about-font-title);
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--about-white);
}

.page-about__eco-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(245, 245, 247, 0.74);
}

.page-about__cta {
  padding: 36px 24px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.16) 0%, rgba(10, 17, 40, 0.9) 60%);
  border: 1px solid rgba(229, 200, 107, 0.22);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.page-about__cta-title {
  margin: 0;
  font-family: var(--about-font-title);
  font-size: 22px;
  font-weight: 700;
  color: var(--about-white);
}

.page-about__cta-btn {
  text-decoration: none;
  display: inline-flex;
}

.page-about__cta .btn-ghost {
  color: var(--about-white);
  border-color: rgba(255, 255, 255, 0.24);
}

.page-about__cta .btn-ghost:hover,
.page-about__cta .btn-ghost:focus-visible {
  border-color: var(--about-gold-light);
  color: var(--about-gold-light);
}

.page-about .btn-primary {
  background: linear-gradient(135deg, #C9A227 0%, #E5C86B 50%, #C9A227 100%);
  border: none;
  color: #0A1128;
  font-weight: 700;
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  box-shadow: 0 0 28px rgba(201, 162, 39, 0.4);
  transform: translateY(-1px);
}

@media (min-width: 640px) {
  .page-about__hero {
    padding: 88px 36px 96px;
  }

  .page-about__hero-inner {
    grid-template-columns: 148px 1fr;
  }

  .page-about__hero-copy {
    grid-column: 1 / -1;
  }

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

  .page-about__philosophy-item--major {
    grid-column: 1 / -1;
  }

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

  .page-about__method-stats {
    grid-template-columns: repeat(3, 1fr);
    padding: 30px 26px;
  }

  .page-about__stat-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about__cta {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }

  .page-about__cta-title {
    width: 100%;
  }
}

@media (min-width: 960px) {
  .page-about__hero {
    padding: 0 48px;
    min-height: 86vh;
  }

  .page-about__hero-inner {
    grid-template-columns: 170px minmax(0, 1fr) 280px;
    gap: 44px;
    align-items: center;
  }

  .page-about__hero-copy {
    grid-column: 2;
  }

  .page-about__hero h1 {
    font-size: clamp(44px, 5vw, 64px);
  }

  .page-about__hero-note {
    grid-column: 3;
    margin-top: 0;
    justify-self: end;
  }

  .page-about__section {
    padding: 110px clamp(40px, 6vw, 64px) 120px;
  }

  .page-about__philosophy-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 0.8fr);
    gap: 24px;
  }

  .page-about__philosophy-item--major {
    grid-column: 1;
    grid-row: 1;
    padding: 48px 36px;
  }

  .page-about__philosophy-item--major h3 {
    font-size: 32px;
  }

  .page-about__philosophy-item {
    grid-column: auto;
    padding: 28px 24px;
  }

  .page-about__philosophy-item:nth-of-type(2) {
    grid-column: 2;
  }

  .page-about__philosophy-item:nth-of-type(3) {
    grid-column: 3;
  }

  .page-about__journey-wrap {
    grid-template-columns: 0.82fr 1.18fr;
    gap: 60px;
    align-items: center;
  }

  .page-about__journey-media {
    border-radius: 24px;
  }

  .page-about__cert-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__cert-card {
    border-radius: 22px;
  }

  .page-about__method-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__eco-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    padding: 18px;
  }

  .page-about__eco-cards {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .page-about__cta {
    padding: 44px 40px;
  }

  .page-about__cta-title {
    font-size: 26px;
    width: auto;
  }
}

@media (min-width: 1280px) {
  .page-about__hero-inner {
    max-width: 1320px;
  }

  .page-about__lead {
    font-size: 17px;
  }

  .page-about__timeline::before {
    left: 17px;
  }

  .page-about__timeline-dot {
    width: 18px;
    height: 18px;
    left: 8px;
  }

  .page-about__timeline-item {
    padding-left: 64px;
  }

  .page-about__stat-num {
    font-size: 44px;
  }
}