/* ===== 品牌概况页专属样式 ===== */
.page-about {
  --about-accent-line: #00FF87;
  --about-gold-line: #FFD700;
  --about-bg-card-alt: #1B2838;
  --about-flow-bg: #0B1A2A;
  --about-hero-graphic-size: clamp(160px, 30vw, 280px);
  --about-number-size: clamp(2.4rem, 5vw, 4rem);
}

/* 首屏英雄区 */
.page-about .about-hero {
  position: relative;
  padding: 2.5rem 1rem 2rem;
  overflow: hidden;
  background: radial-gradient(ellipse at 85% 25%, rgba(0,255,135,0.06) 0%, transparent 60%);
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  align-items: flex-start;
  position: relative;
  z-index: 2;
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
}

.page-about .about-hero__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-about .about-hero__logo {
  width: 60px;
  height: 40px;
  object-fit: contain;
  border-radius: 8px;
  background: var(--bg-card, #1B2838);
  padding: 4px;
}

@media (min-width: 640px) {
  .page-about .about-hero__logo {
    width: 120px;
    height: 80px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__logo {
    width: 300px;
    height: 200px;
  }
}

.page-about .about-hero__badge {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-gold, #FFD700);
  border: 1px solid var(--accent-gold, #FFD700);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-hero__text {
  max-width: 680px;
}

.page-about .about-hero__title {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-white, #FFFFFF);
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

.page-about .about-hero__subtitle {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary, #B0B0B0);
  margin: 0 0 1.2rem;
  max-width: 580px;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary, #B0B0B0);
}

.page-about .about-breadcrumb a {
  color: var(--accent-green, #00FF87);
  text-decoration: none;
  transition: opacity 0.2s;
}

.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus {
  opacity: 0.7;
  outline: none;
}

.page-about .about-breadcrumb__sep {
  color: var(--accent-gold, #FFD700);
  font-size: 0.9rem;
}

/* 首屏抽象网络图 */
.page-about .about-hero__graphic {
  position: absolute;
  top: 1rem;
  right: -1rem;
  width: var(--about-hero-graphic-size);
  height: var(--about-hero-graphic-size);
  opacity: 0.4;
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero__network {
  width: 100%;
  height: 100%;
}

@media (min-width: 720px) {
  .page-about .about-hero__graphic {
    top: 0.5rem;
    right: 2rem;
    opacity: 0.55;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 4rem 2rem 3rem;
  }
  .page-about .about-hero__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .page-about .about-hero__graphic {
    position: static;
    width: clamp(200px, 22vw, 300px);
    height: auto;
    opacity: 0.7;
  }
}

/* 品牌简介区 */
.page-about .about-intro {
  padding: 2.5rem 1rem;
}

.page-about .about-intro__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-intro__text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary, #F5F5F5);
  margin: 0 0 1.2rem;
}

.page-about .about-intro__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-intro__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.page-about .about-intro__img {
  width: 100%;
  max-width: 500px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: var(--border-radius, 16px);
  background: var(--bg-card, #1B2838);
}

.page-about .about-intro__caption {
  font-size: 0.8rem;
  color: var(--text-secondary, #B0B0B0);
  letter-spacing: 0.06em;
  font-style: italic;
}

@media (min-width: 720px) {
  .page-about .about-intro__grid {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }
  .page-about .about-intro__text {
    flex: 1.1;
  }
  .page-about .about-intro__visual {
    flex: 0.9;
  }
}

/* 数据来源与可靠性 */
.page-about .about-data {
  padding: 2.5rem 1rem;
  background: linear-gradient(180deg, var(--bg-deep, #0D1B2A) 0%, var(--bg-mid, #162233) 100%);
}

.page-about .about-data__inner {
  max-width: var(--content-narrow, 780px);
  margin: 0 auto;
}

.page-about .about-data__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin-top: 1.8rem;
}

.page-about .about-data__card {
  padding: 1.5rem 1.2rem;
  border-left: 3px solid var(--accent-green, #00FF87);
  transition: transform 0.2s, box-shadow 0.2s;
  background: var(--bg-card, #1B2838);
  border-radius: var(--border-radius, 16px);
}

.page-about .about-data__card:hover {
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(0,255,135,0.08);
}

.page-about .about-data__card-icon {
  margin-bottom: 0.8rem;
  width: 48px;
  height: 48px;
}

.page-about .about-data__card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white, #FFFFFF);
  margin: 0 0 0.4rem;
}

.page-about .about-data__card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary, #B0B0B0);
  margin: 0;
}

@media (min-width: 640px) {
  .page-about .about-data__cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-data__cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 核心价值 */
.page-about .about-values {
  padding: 2.5rem 1rem;
}

.page-about .about-values__inner {
  max-width: var(--content-narrow, 780px);
  margin: 0 auto;
}

.page-about .about-values__grid {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-top: 1.8rem;
}

.page-about .about-values__item {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  padding: 1.2rem 0;
  border-bottom: 1px solid rgba(0,255,135,0.12);
}

.page-about .about-values__item:last-child {
  border-bottom: none;
}

.page-about .about-values__number {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--about-number-size);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-green, #00FF87);
  opacity: 0.5;
  flex-shrink: 0;
  min-width: 2.8rem;
}

.page-about .about-values__item-text h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-white, #FFFFFF);
  margin: 0 0 0.3rem;
}

.page-about .about-values__item-text p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary, #B0B0B0);
  margin: 0;
}

@media (min-width: 640px) {
  .page-about .about-values__item {
    padding: 1.5rem 0;
  }
}

/* 数据流程图 */
.page-about .about-flow {
  padding: 2.5rem 1rem;
  background: var(--about-flow-bg);
  border-top: 1px solid rgba(255,215,0,0.1);
  border-bottom: 1px solid rgba(255,215,0,0.1);
}

.page-about .about-flow__inner {
  max-width: var(--content-narrow, 780px);
  margin: 0 auto;
}

.page-about .about-flow__desc {
  font-size: 0.95rem;
  color: var(--text-secondary, #B0B0B0);
  margin: 0.4rem 0 1.8rem;
}

.page-about .about-flow__diagram {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-about .about-flow__steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(0,255,135,0.15);
  padding-bottom: 0.8rem;
}

.page-about .about-flow__step-btn {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 1.2rem;
  border: none;
  background: transparent;
  color: var(--text-secondary, #B0B0B0);
  cursor: pointer;
  border-radius: 20px;
  transition: all 0.25s;
  position: relative;
}

.page-about .about-flow__step-btn:hover {
  color: var(--text-primary, #F5F5F5);
  background: rgba(0,255,135,0.08);
}

.page-about .about-flow__step-btn[aria-selected="true"] {
  color: var(--accent-green, #00FF87);
  background: rgba(0,255,135,0.12);
  box-shadow: 0 0 0 1px var(--accent-green, #00FF87);
}

.page-about .about-flow__step-btn:focus-visible {
  outline: 2px solid var(--accent-gold, #FFD700);
  outline-offset: 2px;
}

.page-about .about-flow__panels {
  min-height: 180px;
}

.page-about .about-flow__panel {
  animation: about-fade-in 0.3s ease;
}

.page-about .about-flow__panel p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-primary, #F5F5F5);
  margin: 0.8rem 0 0;
}

.page-about .about-flow__panel[hidden] {
  display: none;
}

.page-about .about-flow__img {
  width: 100%;
  max-width: 800px;
  height: auto;
  aspect-ratio: 2/1;
  object-fit: cover;
  border-radius: var(--border-radius, 16px);
  background: var(--bg-card, #1B2838);
  margin-bottom: 0.6rem;
}

@keyframes about-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 640px) {
  .page-about .about-flow__steps {
    gap: 0.8rem;
  }
  .page-about .about-flow__step-btn {
    font-size: 1rem;
    padding: 0.5rem 1.6rem;
  }
}

/* 底部行动号召 */
.page-about .about-cta {
  padding: 2.5rem 1rem;
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--bg-card, #1B2838);
  border-radius: var(--border-radius, 16px);
  border: 1px solid rgba(0,255,135,0.08);
}

.page-about .about-cta__text {
  font-size: 1.05rem;
  color: var(--text-primary, #F5F5F5);
  margin: 0;
  max-width: 420px;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.page-about .about-cta__links .btn,
.page-about .about-cta__links .btn-outline {
  font-size: 0.95rem;
  padding: 0.6rem 1.8rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.25s;
}

/* 覆盖全局 .btn 样式仅在本页微调 */
.page-about .about-cta__links .btn {
  background: var(--accent-green, #00FF87);
  color: var(--bg-deep, #0D1B2A);
  border: 1px solid var(--accent-green, #00FF87);
}

.page-about .about-cta__links .btn:hover {
  background: transparent;
  color: var(--accent-green, #00FF87);
}

.page-about .about-cta__links .btn-outline {
  background: transparent;
  color: var(--accent-green, #00FF87);
  border: 1px solid var(--accent-green, #00FF87);
}

.page-about .about-cta__links .btn-outline:hover {
  background: var(--accent-green, #00FF87);
  color: var(--bg-deep, #0D1B2A);
}

@media (min-width: 640px) {
  .page-about .about-cta__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    padding: 2rem 2.5rem;
  }
  .page-about .about-cta__text {
    font-size: 1.1rem;
  }
}

/* 通用 section-label 增强（本页变体） */
.page-about .section-label[data-accent="true"] {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-gold, #FFD700);
  border-left: 3px solid var(--accent-gold, #FFD700);
  padding-left: 0.7rem;
  margin: 0 0 1rem;
  line-height: 1.4;
}

/* 响应式间距微调 */
@media (max-width: 420px) {
  .page-about .about-hero__title {
    font-size: 1.5rem;
  }
  .page-about .about-hero__badge {
    font-size: 0.65rem;
    padding: 0.15rem 0.6rem;
  }
  .page-about .about-data__card {
    padding: 1.2rem 1rem;
  }
  .page-about .about-values__item {
    gap: 0.8rem;
  }
  .page-about .about-flow__step-btn {
    font-size: 0.8rem;
    padding: 0.35rem 1rem;
  }
}

/* 媒体查询：桌面补强 */
@media (min-width: 1024px) {
  .page-about .about-intro {
    padding: 4rem 2rem;
  }
  .page-about .about-data {
    padding: 4rem 2rem;
  }
  .page-about .about-values {
    padding: 4rem 2rem;
  }
  .page-about .about-flow {
    padding: 4rem 2rem;
  }
  .page-about .about-cta {
    padding: 3rem 2rem 4rem;
  }
}

/* 确保长文本可读 */
.page-about .content-narrow {
  max-width: var(--content-narrow, 780px);
  margin-left: auto;
  margin-right: auto;
}

/* 图片响应式兜底 */
.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 与共享变量对齐的卡片微调 */
.page-about .card {
  background: var(--bg-card, #1B2838);
  border-radius: var(--border-radius, 16px);
}
</main>