.page-about {
  --about-gutter: clamp(1rem, 4vw, 2rem);
  background: var(--c-black);
  color: var(--c-cream);
  font-family: var(--font-b);
  line-height: 1.7;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about a {
  text-decoration: none;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-h);
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

/* 面包屑 */
.page-about .about-breadcrumb {
  border-bottom: 1px solid var(--c-carbon);
  background: var(--c-black);
}

.page-about .about-breadcrumb-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0.875rem var(--about-gutter);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-d);
  font-size: 0.85rem;
  color: var(--c-gray);
}

.page-about .about-breadcrumb-link {
  color: var(--c-blue);
  transition: color 0.2s var(--ease);
}

.page-about .about-breadcrumb-link:hover {
  color: var(--c-cream);
}

.page-about .about-breadcrumb-sep {
  color: var(--c-gray);
}

.page-about .about-breadcrumb-current {
  color: var(--c-cream);
}

/* Hero 区 */
.page-about .about-hero {
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.09), transparent 62%),
    repeating-linear-gradient(-45deg, rgba(255, 107, 53, 0.03) 0 1px, transparent 1px 12px),
    var(--c-black);
  border-bottom: 3px solid var(--c-orange);
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(2.2rem, 6vw, 4.5rem) var(--about-gutter);
  display: grid;
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.page-about .about-hero-side {
  display: flex;
  align-items: flex-start;
}

.page-about .about-vertical-label {
  writing-mode: horizontal-tb;
  font-family: var(--font-h);
  font-size: 1.75rem;
  letter-spacing: 0.18em;
  color: var(--c-orange);
  display: inline-block;
  position: relative;
  padding-left: 0.5rem;
}

.page-about .about-vertical-label::before {
  content: "";
  display: block;
  width: 8px;
  height: 56px;
  background: var(--c-orange);
  margin-bottom: 0.75rem;
}

.page-about .about-hero-kicker {
  font-family: var(--font-d);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-blue);
  margin-bottom: 1rem;
}

.page-about .about-hero-main h1 {
  color: var(--c-cream);
  font-size: clamp(1.7rem, 4.4vw, 3.1rem);
  margin: 0 0 1rem;
}

.page-about .about-hero-desc {
  color: var(--c-gray);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 680px;
  margin: 0;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  margin-top: 1.5rem;
}

.page-about .about-hero-stat {
  font-family: var(--font-d);
  font-size: 0.85rem;
  color: var(--c-gray);
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.page-about .about-hero-stat b {
  font-family: var(--font-d);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--c-orange);
  line-height: 1;
}

.page-about .about-hero-note {
  background: var(--c-carbon);
  border-left: 4px solid var(--c-orange);
  padding: 1rem 1.25rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-about .about-note-label {
  font-family: var(--font-d);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-orange);
  display: block;
  margin-bottom: 0.5rem;
}

.page-about .about-hero-note p {
  margin: 0;
  color: var(--c-cream);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 区块通用 */
.page-about .about-origin,
.page-about .about-source,
.page-about .about-milestone {
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
}

.page-about .about-symbol {
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
  background: var(--c-carbon);
}

.page-about .about-section-head {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
  margin-bottom: 2rem;
}

.page-about .about-section-tag {
  font-family: var(--font-d);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange);
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: rgba(255, 107, 53, 0.12);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  margin-bottom: 0.75rem;
}

.page-about .about-section-head h2 {
  color: var(--c-cream);
  font-size: clamp(1.55rem, 3.4vw, 2.6rem);
  margin: 0;
}

.page-about .about-section-sub {
  color: var(--c-gray);
  max-width: 640px;
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
}

/* 编辑部由来 */
.page-about .about-origin {
  background: var(--c-black);
  position: relative;
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255, 107, 53, 0.02) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

.page-about .about-origin-body {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
}

.page-about .about-newspaper-cols {
  column-width: 300px;
  column-gap: 2.5rem;
  column-rule: 1px solid #2A2A2A;
  color: var(--c-cream);
  line-height: 1.85;
  position: relative;
  z-index: 1;
}

.page-about .about-newspaper-cols p {
  margin: 0 0 1.25rem;
  text-align: justify;
  break-inside: avoid;
}

.page-about .about-newspaper-cols p:first-child::first-letter {
  font-family: var(--font-h);
  font-size: 3.4em;
  float: left;
  line-height: 0.85;
  margin: 0.06em 0.1em 0 0;
  color: var(--c-orange);
}

.page-about .about-team-figure {
  margin: 2.25rem 0 0;
  position: relative;
  z-index: 1;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  max-width: 700px;
  border-radius: 4px;
}

.page-about .about-team-figure figcaption,
.page-about .about-tool-figure figcaption,
.page-about .about-symbol-figure figcaption {
  font-family: var(--font-d);
  font-size: 0.85rem;
  color: var(--c-gray);
  margin-top: 0.6rem;
  padding-left: 1rem;
  border-left: 3px solid var(--c-orange);
}

/* 方法论 */
.page-about .about-method {
  background:
    radial-gradient(circle at 12% 40%, rgba(255, 107, 53, 0.06), transparent 55%),
    radial-gradient(circle at 88% 70%, rgba(0, 229, 255, 0.04), transparent 50%),
    var(--c-carbon);
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-method .about-section-head {
  padding-inline: var(--about-gutter);
}

.page-about .about-method-grid {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
  display: grid;
  gap: 1.25rem;
}

.page-about .about-method-card {
  background: var(--c-black);
  border-top: 4px solid var(--c-orange);
  padding: 1.6rem 1.4rem 1.4rem;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-method-card:hover {
  transform: translateY(-4px);
  background: #161616;
}

.page-about .about-method-num {
  font-family: var(--font-d);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--c-orange);
  line-height: 1;
}

.page-about .about-method-card h3 {
  color: var(--c-cream);
  font-size: 1.05rem;
  margin: 0.7rem 0 0.5rem;
}

.page-about .about-method-card p {
  margin: 0;
  color: var(--c-gray);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-about .about-compare {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem var(--about-gutter) 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .about-compare-col {
  flex: 1;
  padding: 1.4rem 1.5rem;
  border: 1px solid #2A2A2A;
  background: rgba(13, 13, 13, 0.65);
}

.page-about .about-compare-col--old {
  border-left: 4px solid var(--c-gray);
}

.page-about .about-compare-col--new {
  border-left: 4px solid var(--c-blue);
}

.page-about .about-compare-label {
  font-family: var(--font-d);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gray);
}

.page-about .about-compare-col--new .about-compare-label {
  color: var(--c-blue);
}

.page-about .about-compare-text {
  margin: 0.6rem 0 0;
  color: var(--c-cream);
  font-size: 0.93rem;
  line-height: 1.7;
}

.page-about .about-compare-arrow {
  align-self: center;
  font-family: var(--font-d);
  font-size: 1.8rem;
  color: var(--c-orange);
  transform: rotate(90deg);
}

/* 数据来源 */
.page-about .about-source {
  background: var(--c-black);
}

.page-about .about-source-body {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
  display: grid;
  gap: 2rem;
}

.page-about .about-source-copy p {
  color: var(--c-cream);
  line-height: 1.8;
  margin: 0 0 1rem;
}

.page-about .about-source-rule {
  margin-top: 1.5rem;
  padding: 0.875rem 1rem;
  background: rgba(0, 229, 255, 0.07);
  border-left: 3px solid var(--c-blue);
  font-family: var(--font-d);
  font-size: 0.85rem;
  color: var(--c-gray);
}

.page-about .about-source-flow {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--c-carbon);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .about-flow-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1rem;
  background: var(--c-black);
}

.page-about .about-flow-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-orange);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.18);
}

.page-about .about-flow-label {
  font-family: var(--font-h);
  color: var(--c-cream);
  font-size: 0.95rem;
  min-width: 4.5em;
}

.page-about .about-flow-desc {
  color: var(--c-gray);
  font-size: 0.85rem;
}

.page-about .about-flow-line {
  width: 2px;
  height: 18px;
  margin-left: calc(5px + 1rem);
  background: var(--grad-speed);
}

/* 里程碑 */
.page-about .about-milestone {
  background:
    radial-gradient(circle at 15% 30%, rgba(255, 107, 53, 0.05), transparent 50%),
    radial-gradient(circle at 85% 20%, rgba(0, 229, 255, 0.04), transparent 45%),
    var(--c-black);
}

.page-about .about-timeline {
  position: relative;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
}

.page-about .about-timeline-svg {
  display: block;
  width: 100%;
  height: 80px;
  margin-bottom: 1.2rem;
  pointer-events: none;
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 1.5rem 2rem;
  border-left: 2px solid #2A2A2A;
}

.page-about .about-timeline-item:last-child {
  border-left-color: transparent;
}

.page-about .about-tl-dot {
  position: absolute;
  left: -9px;
  top: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
}

.page-about .about-tl-year {
  font-family: var(--font-d);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--c-orange);
  display: block;
  line-height: 1.2;
}

.page-about .about-tl-title {
  font-family: var(--font-h);
  font-size: 1rem;
  color: var(--c-cream);
  display: block;
  margin: 0.3rem 0 0.25rem;
}

.page-about .about-tl-desc {
  color: var(--c-gray);
  font-size: 0.86rem;
  line-height: 1.6;
  display: block;
  max-width: 240px;
}

.page-about .about-timeline-item:hover .about-tl-desc {
  color: var(--c-cream);
}

.page-about .about-tool-figure {
  max-width: var(--max-w);
  margin: 2rem auto 0;
  padding: 0 var(--about-gutter);
}

.page-about .about-tool-figure img {
  display: block;
  width: 100%;
  max-width: 600px;
  border-radius: 4px;
}

/* 品牌符号 */
.page-about .about-symbol .about-section-head {
  margin-bottom: 2rem;
}

.page-about .about-symbol-body {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
  display: grid;
  gap: 2rem;
}

.page-about .about-symbol-figure {
  margin: 0;
}

.page-about .about-symbol-figure img {
  display: block;
  width: 100%;
  max-width: 420px;
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.page-about .about-symbol-copy p {
  color: var(--c-cream);
  line-height: 1.75;
  margin: 0 0 1rem;
}

.page-about .about-symbol-quote {
  margin: 1.5rem 0;
  padding: 1.1rem 1.4rem;
  border-left: 4px solid var(--c-orange);
  background: rgba(255, 107, 53, 0.08);
}

.page-about .about-symbol-quote p {
  margin: 0;
  color: var(--c-orange);
  font-family: var(--font-h);
  font-size: 1rem;
  line-height: 1.6;
}

/* 编辑部通讯 */
.page-about .about-editorial {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  background:
    var(--grad-speed),
    repeating-linear-gradient(-45deg, rgba(255, 107, 53, 0.025) 0 1px, transparent 1px 10px),
    var(--c-black);
  position: relative;
}

.page-about .about-editorial-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem var(--about-gutter);
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-about .about-editorial-inner .about-section-tag {
  margin-bottom: 0.9rem;
}

.page-about .about-editorial-inner h2 {
  color: var(--c-cream);
  font-size: clamp(1.45rem, 3.2vw, 2.3rem);
  margin: 0 0 1rem;
}

.page-about .about-editorial-inner p {
  max-width: 740px;
  margin-inline: auto;
  color: var(--c-gray);
  line-height: 1.85;
  margin-bottom: 1rem;
}

.page-about .about-editorial-inner .about-editorial-lead {
  color: var(--c-orange);
  font-family: var(--font-h);
  font-size: 1.3rem;
}

.page-about .about-editorial-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.75rem;
}

.page-about .about-link-btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-d);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  background: var(--c-orange);
  color: var(--c-black);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-link-btn:hover {
  transform: translateY(-3px);
  background: #ff8550;
}

.page-about .about-link-btn--ghost {
  background: transparent;
  border: 1px solid var(--c-blue);
  color: var(--c-blue);
}

.page-about .about-link-btn--ghost:hover {
  background: rgba(0, 229, 255, 0.08);
}

/* 相关导航 */
.page-about .about-related {
  padding: 2.5rem 0 3.5rem;
  background: var(--c-black);
}

.page-about .about-related-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--about-gutter);
}

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

.page-about .about-related-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.5rem;
  background: var(--c-carbon);
  color: var(--c-cream);
  border-top: 3px solid var(--c-orange);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-related-card:hover {
  background: #202020;
  transform: translateY(-3px);
}

.page-about .about-related-num {
  font-family: var(--font-d);
  font-size: 1.05rem;
  color: var(--c-orange);
}

.page-about .about-related-card strong {
  font-family: var(--font-h);
  font-size: 1.2rem;
}

.page-about .about-related-card span:last-child {
  color: var(--c-gray);
  font-size: 0.875rem;
  line-height: 1.65;
}

/* 媒体查询：平板与桌面 */
@media (min-width: 700px) {
  .page-about .about-method-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-compare {
    flex-direction: row;
    align-items: stretch;
  }

  .page-about .about-compare-arrow {
    transform: rotate(0deg);
  }

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

@media (min-width: 860px) {
  .page-about .about-source-body {
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-symbol-body {
    grid-template-columns: 420px 1fr;
    gap: 3rem;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: 100px 1fr 240px;
    gap: 2rem;
    align-items: start;
  }

  .page-about .about-vertical-label {
    writing-mode: vertical-rl;
    font-size: 2.25rem;
    padding-left: 0;
    padding-top: 0.5rem;
  }

  .page-about .about-vertical-label::before {
    width: 56px;
    height: 8px;
    margin-bottom: 0.75rem;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-hero-note {
    margin-top: 1.25rem;
  }
}

@media (min-width: 768px) {
  .page-about .about-timeline-svg {
    position: absolute;
    top: 0;
    left: var(--about-gutter);
    width: calc(100% - var(--about-gutter) * 2);
    height: 220px;
    margin-bottom: 0;
  }

  .page-about .about-timeline-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    padding-top: 140px;
  }

  .page-about .about-timeline-item {
    border-left: 0;
    padding: 0 0.5rem;
    text-align: center;
  }

  .page-about .about-tl-dot {
    left: 50%;
    top: 118px;
    transform: translateX(-50%);
  }

  .page-about .about-tl-year {
    font-size: 1.65rem;
    text-align: center;
  }

  .page-about .about-tl-title {
    text-align: center;
    font-size: 0.975rem;
  }

  .page-about .about-tl-desc {
    font-size: 0.8rem;
    margin-inline: auto;
    max-width: 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }

  .page-about .about-method-card:hover,
  .page-about .about-related-card:hover,
  .page-about .about-link-btn:hover {
    transform: none;
  }
}