.page-about {
  --origin-yellow: #F2C94C;
  --origin-night: #0D1B2A;
  --origin-cream: #F8F6F3;
  --origin-green: #2D8F5E;
  --origin-green-deep: #1C6C45;
  --origin-green-dark: #145235;
  --origin-green-light: #E0F2E9;
  --origin-blue: #4A90D9;
  --origin-gray-deep: #2B2B2B;
  --origin-gray-mid: #5A5A5A;
  --origin-white: #FFFFFF;
  font-family: var(--font-sans);
  color: var(--origin-gray-deep);
  background: var(--origin-cream);
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  padding-top: calc(var(--header-height) + 18px);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: var(--origin-gray-mid);
}

.page-about .breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--origin-gray-mid);
}

.page-about .breadcrumb__item a {
  color: var(--origin-green-deep);
  text-decoration: none;
}

.page-about .breadcrumb__item a:hover {
  text-decoration: underline;
}

.page-about .breadcrumb__current {
  color: var(--origin-gray-mid);
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  padding: 32px 0 40px;
}

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

.page-about .about-hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-size: 34px;
  line-height: 1.22;
  font-weight: 700;
  margin: 0;
  color: var(--origin-gray-deep);
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--origin-gray-mid);
  margin: 0;
  max-width: 32em;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 18px;
  background: var(--origin-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--origin-green);
  min-width: 96px;
}

.page-about .about-hero__fact-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--origin-green-dark);
  line-height: 1.1;
}

.page-about .about-hero__fact-label {
  font-size: 12px;
  color: var(--origin-gray-mid);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 18px -14px -14px 18px;
  border: 2px solid var(--origin-yellow);
  border-radius: var(--radius-lg);
  transform: rotate(1.5deg);
  z-index: 0;
}

.page-about .about-hero__image {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ===== 路线索引 ===== */
.page-about .story-route {
  background: var(--origin-yellow);
  padding: 18px 0;
  transform: rotate(-0.4deg) scale(1.02);
  margin: 4px 0 0;
  position: relative;
  z-index: 2;
}

.page-about .story-route__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  transform: rotate(0.4deg);
}

.page-about .story-route__label {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--origin-green-dark);
  text-transform: uppercase;
}

.page-about .story-route__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .story-route__item {
  flex-shrink: 0;
}

.page-about .story-route__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--origin-white);
  color: var(--origin-gray-deep);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.page-about .story-route__link:hover {
  background: var(--origin-green);
  color: var(--origin-white);
  transform: translateY(-2px);
}

.page-about .story-route__num {
  color: var(--origin-green);
  font-weight: 700;
}

.page-about .story-route__link:hover .story-route__num {
  color: var(--origin-yellow);
}

/* ===== 章节通用 ===== */
.page-about .section-num {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--origin-green-deep);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-about .section-num::before {
  content: "";
  width: 28px;
  height: 4px;
  background: var(--origin-yellow);
  transform: skewX(-20deg);
}

.page-about .section-num span {
  font-size: 28px;
  line-height: 1;
  color: var(--origin-green);
  font-family: var(--font-serif);
}

.page-about .section-num--light {
  color: rgba(255, 255, 255, 0.85);
}

.page-about .section-num--light span {
  color: var(--origin-yellow);
}

.page-about .section-num--light::before {
  background: var(--origin-yellow);
}

/* ===== 01 品牌起源 ===== */
.page-about .story-origin {
  background: var(--origin-green-light);
  padding: 56px 0 60px;
  position: relative;
}

.page-about .story-origin::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 8px;
  background: linear-gradient(90deg, var(--origin-yellow) 0%, var(--origin-green) 100%);
  transform: skewY(-0.6deg);
}

.page-about .story-origin__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .story-origin__content h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--origin-gray-deep);
}

.page-about .story-origin__content p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--origin-gray-mid);
  margin: 0 0 14px;
}

.page-about .story-origin__values {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .story-origin__values li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--origin-gray-deep);
}

.page-about .story-origin__dot {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--origin-yellow);
  transform: rotate(18deg);
  flex-shrink: 0;
  margin-top: 5px;
}

.page-about .story-origin__visual {
  display: flex;
  justify-content: center;
}

.page-about .story-svg {
  width: 100%;
  max-width: 760px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ===== 02 积分榜诞生 ===== */
.page-about .story-standings {
  background:
    radial-gradient(circle at 12% 22%, rgba(242, 201, 76, 0.09) 0, transparent 42%),
    radial-gradient(circle at 88% 76%, rgba(74, 144, 217, 0.08) 0, transparent 46%),
    linear-gradient(118deg, var(--origin-night) 0%, #13283D 55%, var(--origin-night) 100%);
  color: rgba(255, 255, 255, 0.92);
  padding: 64px 0 68px;
  position: relative;
  overflow: hidden;
}

.page-about .story-standings::before {
  content: "";
  position: absolute;
  top: 0;
  right: -40px;
  width: 260px;
  height: 260px;
  border: 3px solid rgba(242, 201, 76, 0.25);
  border-radius: 50%;
  transform: skewX(-12deg);
}

.page-about .story-standings h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 16px;
  color: #FFFFFF;
}

.page-about .story-standings p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 14px;
}

.page-about .story-standings__grid {
  display: grid;
  gap: 40px;
}

.page-about .story-standings__rule {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.page-about .story-standings__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .story-standings__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--origin-yellow);
  padding: 18px 16px;
  border-radius: var(--radius);
}

.page-about .story-standings__stat-num {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--origin-yellow);
  font-family: var(--font-serif);
}

.page-about .story-standings__stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}

/* ===== 03 内容目录 ===== */
.page-about .story-catalog {
  background: var(--origin-cream);
  padding: 56px 0 60px;
  position: relative;
}

.page-about .story-catalog::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--origin-green), transparent);
  opacity: 0.6;
}

.page-about .story-catalog .section-head h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--origin-gray-deep);
}

.page-about .story-catalog .section-head > p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--origin-gray-mid);
  margin: 0;
  max-width: 42em;
}

.page-about .story-catalog__grid {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}

.page-about .story-catalog__legend {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .story-catalog__legend .legend {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .story-catalog__legend .legend__item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  padding: 12px 16px;
  background: var(--origin-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.page-about .story-catalog__helper {
  padding: 18px 20px;
  background: var(--origin-yellow);
  border-radius: var(--radius);
  color: var(--origin-green-dark);
  box-shadow: var(--shadow-sm);
}

.page-about .story-catalog__helper strong {
  font-size: 15px;
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}

.page-about .story-catalog__helper p {
  font-size: 13px;
  line-height: 1.7;
  margin: 0;
}

.page-about .story-catalog__map {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .story-catalog__map img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.page-about .story-catalog__map figcaption {
  font-size: 13px;
  color: var(--origin-gray-mid);
  text-align: right;
}

/* ===== 04 版本历程 ===== */
.page-about .story-version {
  background: var(--origin-green-light);
  padding: 56px 0 60px;
  position: relative;
  overflow: hidden;
}

.page-about .story-version::after {
  content: "";
  position: absolute;
  bottom: -24px;
  right: -30px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(242, 201, 76, 0.14);
}

.page-about .story-version .section-head h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--origin-gray-deep);
}

.page-about .story-version .section-head > p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--origin-gray-mid);
  margin: 0;
  max-width: 44em;
}

.page-about .version-track {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  overflow-x: auto;
  padding-bottom: 12px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .version-item {
  flex: 0 0 280px;
  scroll-snap-align: start;
  padding: 20px;
  background: var(--origin-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
}

.page-about .version-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.page-about .version-item--current {
  border-top: 4px solid var(--origin-yellow);
}

.page-about .version-item__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.page-about .version-item__tag {
  display: inline-flex;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--origin-green-light);
  color: var(--origin-green-dark);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
}

.page-about .version-item--current .version-item__tag {
  background: var(--origin-yellow);
  color: var(--origin-night);
}

.page-about .version-item__year {
  font-size: 13px;
  color: var(--origin-gray-mid);
}

.page-about .version-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 8px 0 4px;
  color: var(--origin-gray-deep);
  line-height: 1.3;
}

.page-about .version-item p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--origin-gray-mid);
  margin: 0;
}

.page-about .story-version__list {
  margin: 0;
  padding: 0 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .story-version__list li {
  font-size: 13px;
  line-height: 1.6;
  color: var(--origin-gray-deep);
}

.page-about .version-item .panel {
  margin-top: 6px;
}

.page-about .version-item .panel__trigger {
  background: none;
  border: none;
  padding: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--origin-green-deep);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-about .version-item .panel__trigger:hover {
  text-decoration: underline;
}

.page-about .version-item .panel__icon {
  width: 18px;
  height: 18px;
  position: relative;
  display: inline-block;
}

.page-about .version-item .panel__icon::before,
.page-about .version-item .panel__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--origin-green-deep);
  transform: translate(-50%, -50%);
}

.page-about .version-item .panel__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform var(--transition);
}

.page-about .version-item .panel[data-open] .panel__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-about .version-item .panel__content {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px dashed rgba(45, 143, 94, 0.35);
}

.page-about .story-version__docs {
  margin-top: 36px;
  display: grid;
  gap: 28px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about .story-version__text h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--origin-gray-deep);
  margin: 0 0 12px;
}

.page-about .story-version__text p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--origin-gray-mid);
  margin: 0 0 14px;
}

.page-about .story-version__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .story-version__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.page-about .story-version__figure figcaption {
  font-size: 13px;
  color: var(--origin-gray-mid);
  text-align: right;
}

/* ===== 品牌总结 ===== */
.page-about .story-summary {
  background: linear-gradient(102deg, var(--origin-green) 0%, var(--origin-green-deep) 56%, var(--origin-green-dark) 100%);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-about .story-summary::before {
  content: "";
  position: absolute;
  top: -30px;
  left: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 4px solid rgba(242, 201, 76, 0.3);
}

.page-about .story-summary::after {
  content: "";
  position: absolute;
  bottom: -30px;
  right: -20px;
  width: 260px;
  height: 120px;
  background: rgba(242, 201, 76, 0.22);
  transform: skewX(-24deg);
}

.page-about .story-summary__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  max-width: 620px;
}

.page-about .story-summary__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--origin-yellow);
}

.page-about .story-summary h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  color: #FFFFFF;
  margin: 0;
}

.page-about .story-summary p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.page-about .story-summary__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 44px 0 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 44px;
    align-items: center;
  }

  .page-about .about-hero__title {
    font-size: 42px;
    line-height: 1.16;
  }

  .page-about .about-hero__lead {
    font-size: 17px;
    line-height: 1.75;
  }

  .page-about .story-origin {
    padding: 76px 0 80px;
  }

  .page-about .story-origin__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
  }

  .page-about .story-origin__content h2 {
    font-size: 32px;
  }

  .page-about .story-standings {
    padding: 80px 0 84px;
  }

  .page-about .story-standings__grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
  }

  .page-about .story-standings h2 {
    font-size: 32px;
  }

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

  .page-about .story-standings__stat-num {
    font-size: 32px;
  }

  .page-about .story-catalog {
    padding: 72px 0 76px;
  }

  .page-about .story-catalog .section-head h2 {
    font-size: 32px;
  }

  .page-about .story-catalog__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
    align-items: center;
    margin-top: 40px;
  }

  .page-about .story-version {
    padding: 72px 0 76px;
  }

  .page-about .story-version .section-head h2 {
    font-size: 32px;
  }

  .page-about .version-track {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
    overflow-x: visible;
  }

  .page-about .version-item {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-about .story-version__docs {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
    margin-top: 48px;
  }

  .page-about .story-summary {
    padding: 72px 0 80px;
  }

  .page-about .story-summary h2 {
    font-size: 38px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 52px 0 64px;
  }

  .page-about .about-hero__title {
    font-size: 48px;
    line-height: 1.12;
  }

  .page-about .about-hero__facts {
    gap: 14px;
  }

  .page-about .about-hero__fact {
    padding: 16px 22px;
  }

  .page-about .about-hero__fact-num {
    font-size: 24px;
  }

  .page-about .story-route__link {
    padding: 10px 18px;
    font-size: 14px;
  }

  .page-about .section-head h2 {
    font-size: 34px;
  }
}