.page-about {
  --about-gold-soft: #E8D9A0;
  --about-bg-lighter: #10264A;
  --about-line-gold: rgba(201, 162, 39, 0.28);
  --about-line-soft: rgba(244, 241, 235, 0.14);
  --about-jade-tint: rgba(31, 77, 58, 0.6);
  --about-crimson-tint: rgba(107, 45, 45, 0.55);
  background: var(--royal-blue);
  color: var(--ivory);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .about-breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 22px 20px 0;
}
.page-about .about-breadcrumb .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--light-gold);
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-breadcrumb a {
  color: var(--light-gold);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}
.page-about .about-breadcrumb a:hover {
  color: var(--gold);
}
.page-about .about-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--mist);
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: clamp(48px, 7vw, 88px) 20px 64px;
  background:
    radial-gradient(ellipse at 82% 28%, rgba(201, 162, 39, 0.14), transparent 56%),
    linear-gradient(180deg, #0B1E3F 0%, #0E284A 100%);
  border-bottom: 1px solid var(--about-line-gold);
}
.page-about .about-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--light-gold);
  margin: 0 0 16px;
  text-transform: uppercase;
}
.page-about .about-kicker .index-num {
  color: var(--gold);
  margin-right: 6px;
}
.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5.2vw, 56px);
  font-weight: 700;
  line-height: 1.18;
  margin: 0 0 10px;
  background: linear-gradient(120deg, #E8D9A0 0%, #C9A227 58%, #B8912A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-about .about-hero-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.4vw, 26px);
  color: var(--gold-soft, #E8D9A0);
  margin: 0 0 24px;
  letter-spacing: 0.08em;
}
.page-about .about-hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(244, 241, 235, 0.82);
  max-width: 540px;
  margin: 0 0 28px;
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}
.page-about .about-hero-link {
  font-size: 14px;
  color: var(--light-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 217, 160, 0.4);
  padding-bottom: 3px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.page-about .about-hero-link:hover {
  color: var(--gold);
  border-color: var(--gold);
}
.page-about .about-hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 放射徽章 */
.page-about .about-radial {
  position: relative;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: repeating-conic-gradient(from 0deg, rgba(201, 162, 39, 0.32) 0deg 2deg, transparent 2deg 14deg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about .about-radial-ring {
  position: absolute;
  border-radius: 50%;
}
.page-about .about-radial-ring--1 {
  inset: 14px;
  border: 1px dashed var(--about-line-gold);
}
.page-about .about-radial-ring--2 {
  inset: 30px;
  border: 1px solid rgba(201, 162, 39, 0.5);
}
.page-about .about-radial-core {
  position: relative;
  z-index: 2;
  width: 130px;
  height: 130px;
  background: var(--royal-blue);
  border: 2px solid var(--gold);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 8px rgba(201, 162, 39, 0.12);
}
.page-about .about-radial-num {
  font-family: var(--font-mono);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.page-about .about-radial-label {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--light-gold);
  margin-top: 6px;
}

/* ===== Section 通用 ===== */
.page-about .about-section,
.page-about .about-timeline-section,
.page-about .about-guide-section,
.page-about .about-manifesto-section {
  padding: var(--section-pad) 0;
}
.page-about .about-section-head {
  margin-bottom: clamp(36px, 5vw, 56px);
}
.page-about .about-section-head .section-kicker {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--light-gold);
  margin: 0 0 10px;
  text-transform: uppercase;
}
.page-about .about-section-head .section-kicker .index-num {
  color: var(--gold);
  margin-right: 6px;
}
.page-about .about-section-head .section-title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  color: var(--ivory);
  margin: 0;
  line-height: 1.3;
  letter-spacing: 0.04em;
}

/* ===== 品牌缘起 ===== */
.page-about .about-origin {
  position: relative;
}
.page-about .about-origin::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent 70%);
  opacity: 0.5;
}
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
.page-about .about-origin-copy p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 241, 235, 0.82);
  margin: 0 0 20px;
}
.page-about .about-origin-lead {
  color: rgba(244, 241, 235, 0.9);
}
.page-about .about-origin-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-soft);
}
.page-about .about-origin-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line-soft);
  font-size: 15px;
  color: var(--ivory);
}
.page-about .about-origin-list .index-num {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 14px;
  flex-shrink: 0;
}
.page-about .about-origin-figure {
  margin: 0;
}
.page-about .about-origin-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line-gold);
  clip-path: polygon(2% 0, 100% 0, 100% 92%, 92% 100%, 0 100%, 0 2%);
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ===== 发展理念 ===== */
.page-about .about-philosophy {
  background: linear-gradient(180deg, transparent, rgba(16, 38, 74, 0.4), transparent);
}
.page-about .about-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-principle {
  position: relative;
  background: var(--about-bg-lighter);
  border: 1px solid var(--about-line-gold);
  padding: 32px 26px 30px;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.page-about .about-principle:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
}
.page-about .about-principle-index {
  position: absolute;
  top: 22px;
  right: 22px;
  font-family: var(--font-mono);
  font-size: 20px;
  color: rgba(201, 162, 39, 0.6);
}
.page-about .about-principle h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--gold-soft, #E8D9A0);
  margin: 0 0 12px;
  letter-spacing: 0.04em;
}
.page-about .about-principle p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 241, 235, 0.78);
  margin: 0;
}

/* ===== 时间线区 ===== */
.page-about .about-timeline-section {
  background: linear-gradient(180deg, var(--royal-blue) 0%, var(--about-jade-tint) 50%, var(--royal-blue) 100%);
}
.page-about .about-timeline-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}
.page-about .about-timeline-visual {
  display: flex;
  justify-content: center;
}
.page-about .about-timeline-visual .figure {
  margin: 0;
  max-width: 340px;
}
.page-about .about-timeline-visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line-gold);
  object-fit: cover;
  aspect-ratio: 7 / 10;
}
.page-about .about-timeline-list {
  position: relative;
  padding-left: 40px;
  border-left: 1px solid var(--about-line-gold);
}
.page-about .about-timeline-node {
  position: relative;
  margin-bottom: 20px;
}
.page-about .about-timeline-node::before {
  content: "";
  position: absolute;
  left: -45px;
  top: 22px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.18);
}
.page-about .about-timeline-node[data-open]::before {
  background: var(--light-gold);
  box-shadow: 0 0 0 5px rgba(232, 217, 160, 0.22);
}
.page-about .about-timeline-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: transparent;
  border: none;
  padding: 14px 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
}
.page-about .about-timeline-phase {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  white-space: nowrap;
}
.page-about .about-timeline-title {
  flex: 1;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ivory);
}
.page-about .about-timeline-toggle .accordion-icon {
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease);
  flex-shrink: 0;
  margin-right: 6px;
}
.page-about .about-timeline-node[data-open] .about-timeline-toggle .accordion-icon {
  transform: rotate(225deg);
}
.page-about .about-timeline-panel-inner {
  padding: 4px 0 18px;
  color: rgba(244, 241, 235, 0.78);
  font-size: 15px;
  line-height: 1.8;
}
.page-about .about-timeline-panel-inner p {
  margin: 0;
}

/* ===== 常用人群须知（象牙白区） ===== */
.page-about .about-guide-section {
  background: var(--ivory);
  color: var(--royal-blue);
}
.page-about .about-guide-section .section-kicker {
  color: var(--steel);
}
.page-about .about-guide-section .section-title {
  color: var(--royal-blue);
}
.page-about .about-guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.page-about .about-guide-copy > p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(11, 30, 63, 0.82);
  margin: 0 0 24px;
}
.page-about .about-guide-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}
.page-about .about-guide-steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-top: 1px solid rgba(122, 135, 148, 0.3);
}
.page-about .about-guide-steps li .index-num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
  flex-shrink: 0;
  line-height: 1.4;
}
.page-about .about-guide-steps h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--royal-blue);
  margin: 0 0 6px;
}
.page-about .about-guide-steps p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(11, 30, 63, 0.78);
  margin: 0;
}
.page-about .about-guide-aside {
  background: var(--royal-blue);
  color: var(--ivory);
  padding: 36px 28px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}
.page-about .about-guide-aside::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.page-about .about-guide-quote {
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.6;
  color: var(--light-gold);
  margin: 0 0 28px;
  letter-spacing: 0.02em;
}
.page-about .about-guide-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .about-guide-links .btn {
  justify-content: center;
}
.page-about .about-guide-links .btn-ghost {
  border-color: rgba(232, 217, 160, 0.5);
  color: var(--light-gold);
}
.page-about .about-guide-links .btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ===== 刷新宣言 ===== */
.page-about .about-manifesto-section {
  position: relative;
  background:
    linear-gradient(135deg, rgba(107, 45, 45, 0.22) 0%, transparent 40%),
    var(--royal-blue);
}
.page-about .about-manifesto-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
.page-about .about-manifesto-stat {
  text-align: center;
  padding: 40px 24px;
  border: 1px solid var(--about-line-gold);
  clip-path: polygon(4% 0, 100% 0, 100% 92%, 92% 100%, 0 100%, 0 4%);
  background: rgba(16, 38, 74, 0.5);
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(96px, 16vw, 180px);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, #E8D9A0 0%, #C9A227 48%, #8C6D1F 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.page-about .about-stat-label {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 235, 0.75);
  margin: 0 0 20px;
}
.page-about .about-stat-divider {
  width: 56px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 0 auto 20px;
}
.page-about .about-stat-desc {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  letter-spacing: 0.12em;
  color: var(--light-gold);
  margin: 0;
}
.page-about .about-manifesto-lead {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(244, 241, 235, 0.88);
  margin: 0 0 24px;
}
.page-about .about-manifesto-copy > p:last-child {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 235, 0.75);
  margin: 20px 0 0;
}
.page-about .about-manifesto-figure {
  margin: 0;
}
.page-about .about-manifesto-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line-gold);
  object-fit: cover;
  aspect-ratio: 8 / 5;
}

/* ===== 图注 ===== */
.page-about .figure-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin-top: 10px;
  text-align: right;
}

/* ===== 隐藏滚动条干扰 ===== */
.page-about .about-timeline-section .deco-line {
  display: none;
}

/* ===== 平板适配 ===== */
@media (min-width: 640px) {
  .page-about .about-principles {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-guide-links {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .page-about .about-manifesto-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
  }
  .page-about .about-hero-visual .about-radial {
    width: 320px;
    height: 320px;
  }
}

/* ===== 桌面适配 ===== */
@media (min-width: 960px) {
  .page-about .about-hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
  }
  .page-about .about-origin-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }
  .page-about .about-timeline-wrap {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
    align-items: start;
  }
  .page-about .about-guide-grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 60px;
    align-items: start;
  }
  .page-about .about-guide-aside {
    position: sticky;
    top: 100px;
  }
  .page-about .about-manifesto-stat {
    text-align: left;
    padding: 48px 40px;
  }
  .page-about .about-stat-divider {
    margin: 0 0 20px;
  }
}

/* ===== 视口内滚动显现 ===== */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
  transition: none;
}
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  }
  .page-about [data-reveal].is-revealed {
    opacity: 1;
    transform: translateY(0);
  }
}
</main>

.page-about {
  --gold-soft: currentColor;
}