/* ===== 页面专属样式：page-about ===== */
.page-about {
  --about-panel-width: 38%;
  --about-panel-min-width: 320px;
  --about-card-bg: #1a1f30;
  --about-card-border: rgba(255, 215, 0, 0.25);
  --about-card-shadow: 0 2px 3px rgba(0,0,0,0.5), 0 6px 10px rgba(0,0,0,0.3);
  --about-label-size: 2.4rem;
  --about-gold: #ffd700;
  display: block;
}

/* ===== 左右分屏容器 ===== */
.page-about .about-layout {
  display: flex;
  flex-direction: column;
  min-height: 80vh;
  max-width: 1440px;
  margin: 0 auto;
}

/* ===== 左侧品牌面板（移动端：顶部区域） ===== */
.page-about .about-brand-panel {
  background: var(--surface-dark, #131724);
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 24px,
    rgba(57, 255, 20, 0.04) 24px,
    rgba(57, 255, 20, 0.04) 25px
  );
  border-bottom: 2px solid var(--neon-green, #39ff14);
  padding: 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-brand-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--neon-green, #39ff14), var(--electric-blue, #00d4ff), var(--metal-gold, #ffd700));
  opacity: 0.6;
}

.page-about .about-brand-panel-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
  max-width: 380px;
}

.page-about .about-brand-logo {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: 4px;
  background: var(--card-dark, #1a1f30);
  padding: 8px;
  box-shadow: 0 0 0 1px var(--border-subtle, #2a2f45), 0 4px 12px rgba(0,0,0,0.6);
  transition: box-shadow 0.4s ease, transform 0.4s ease;
}

.page-about .about-brand-logo:hover {
  box-shadow: 0 0 0 1px var(--neon-green, #39ff14), 0 0 30px var(--hover-glow, rgba(57,255,20,0.3));
  transform: scale(1.02);
}

.page-about .about-brand-name {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 2.2rem;
  letter-spacing: 0.1em;
  color: var(--neon-green, #39ff14);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.3);
  transition: text-shadow 0.5s ease;
}

.page-about .about-brand-name:hover {
  animation: about-neon-breath 1.2s ease-in-out infinite alternate;
}

@keyframes about-neon-breath {
  0% {
    text-shadow: 0 0 6px rgba(57, 255, 20, 0.3), 0 0 12px rgba(57, 255, 20, 0.1);
  }
  100% {
    text-shadow: 0 0 16px rgba(57, 255, 20, 0.7), 0 0 36px rgba(57, 255, 20, 0.3), 0 0 60px rgba(57, 255, 20, 0.1);
  }
}

.page-about .about-brand-tagline {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary, #b0b8d1);
  background: rgba(0, 212, 255, 0.08);
  padding: 0.3rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.page-about .about-brand-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0 0;
}

.page-about .about-brand-tags li {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-primary, #ffffff);
  background: var(--card-dark, #1a1f30);
  border: 1px solid var(--border-subtle, #2a2f45);
  border-radius: 4px;
  padding: 0.2rem 0.8rem;
  text-transform: uppercase;
}

/* ===== 右侧内容区（移动端：自然流式） ===== */
.page-about .about-content {
  flex: 1;
  padding: 1.5rem 1rem 3rem;
  background: var(--bg-dark, #0b0e16);
}

/* 面包屑 */
.page-about .about-breadcrumb {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 0.85rem;
  color: var(--text-secondary, #b0b8d1);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.page-about .about-breadcrumb a {
  color: var(--electric-blue, #00d4ff);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .about-breadcrumb a:hover {
  color: var(--neon-green, #39ff14);
  text-decoration: underline;
}

.page-about .about-breadcrumb-sep {
  color: var(--border-subtle, #2a2f45);
  margin: 0 0.15rem;
}

.page-about .about-breadcrumb span[aria-current="page"] {
  color: var(--text-primary, #ffffff);
  font-weight: 600;
}

/* 页面标题 h1 */
.page-about .about-page-title {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 2rem;
  letter-spacing: 0.08em;
  color: var(--metal-gold, #ffd700);
  margin: 0 0 2rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border-subtle, #2a2f45);
  position: relative;
}

.page-about .about-page-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--neon-green, #39ff14);
}

/* ===== 卡片通用 ===== */
.page-about .about-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-card-border);
  box-shadow: var(--about-card-shadow);
  padding: 1.5rem 1.25rem;
  margin-bottom: 1.8rem;
  border-radius: 0;
  position: relative;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  animation: about-fade-up 0.6s ease both;
}

.page-about .about-card:nth-of-type(1) { animation-delay: 0.1s; }
.page-about .about-card:nth-of-type(2) { animation-delay: 0.25s; }
.page-about .about-card:nth-of-type(3) { animation-delay: 0.4s; }
.page-about .about-card:nth-of-type(4) { animation-delay: 0.55s; }

@keyframes about-fade-up {
  0% {
    opacity: 0;
    transform: translateY(18px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-about .about-card:hover {
  box-shadow: 0 4px 8px rgba(0,0,0,0.6), 0 10px 20px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

/* 印刷边框：四角装饰 */
.page-about .about-card::before,
.page-about .about-card::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--about-gold);
  border-style: solid;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-card::before {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}

.page-about .about-card::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
}

/* 纸张叠层效果：多层阴影模拟 */
.page-about .about-card {
  box-shadow:
    0 1px 1px rgba(0,0,0,0.4),
    0 3px 4px rgba(0,0,0,0.3),
    0 6px 8px rgba(0,0,0,0.2),
    0 10px 16px rgba(0,0,0,0.1);
}

/* 卡片标签（01/02/03/04） */
.page-about .about-card-label {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: var(--about-label-size);
  line-height: 1;
  color: var(--about-gold);
  opacity: 0.2;
  position: absolute;
  top: 0.4rem;
  right: 0.75rem;
  letter-spacing: 0.02em;
  user-select: none;
  pointer-events: none;
}

/* 卡片标题 */
.page-about .about-card-heading {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: var(--text-primary, #ffffff);
  margin: 0 0 0.75rem 0;
  position: relative;
  padding-left: 0.6rem;
}

.page-about .about-card-heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 3px;
  background: var(--neon-green, #39ff14);
  border-radius: 2px;
}

/* 卡片正文 */
.page-about .about-card-text {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 400;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary, #b0b8d1);
  margin: 0 0 1rem 0;
}

/* 卡片内链 */
.page-about .about-card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.5rem;
}

.page-about .about-inline-link {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--electric-blue, #00d4ff);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  padding: 0.1rem 0;
}

.page-about .about-inline-link:hover {
  color: var(--neon-green, #39ff14);
  border-bottom-color: var(--neon-green, #39ff14);
}

/* 卡片图片 */
.page-about .about-card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
  margin: 1rem 0 0.5rem;
  border: 1px solid var(--border-subtle, #2a2f45);
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

/* 信任声明块 */
.page-about .about-trust-statement {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 400;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary, #b0b8d1);
  background: rgba(57, 255, 20, 0.04);
  border-left: 3px solid var(--neon-green, #39ff14);
  padding: 0.8rem 1rem;
  margin: 1rem 0 0;
  font-style: normal;
  quotes: none;
}

/* 联系我们区块 */
.page-about .about-contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 0.8rem 0;
}

.page-about .about-contact-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--text-primary, #ffffff);
  line-height: 1.4;
}

.page-about .about-contact-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  background: var(--electric-blue, #00d4ff);
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  opacity: 0.7;
}

.page-about .about-contact-icon--mail {
  background: var(--electric-blue, #00d4ff);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='M2 4l10 8 10-8'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='M2 4l10 8 10-8'/%3E%3C/svg%3E") center/contain no-repeat;
  background-color: var(--electric-blue, #00d4ff);
}

.page-about .about-contact-icon--phone {
  background: var(--neon-green, #39ff14);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M22 16.92v3a2 2 0 01-2.18 2 19.79 19.79 0 01-8.63-3.07 19.5 19.5 0 01-6-6 19.79 19.79 0 01-3.07-8.67A2 2 0 014.11 2h3a2 2 0 012 1.72 12.84 12.84 0 00.7 2.81 2 2 0 01-.45 2.11L8.09 9.91a16 16 0 006 6l1.27-1.27a2 2 0 012.11-.45 12.84 12.84 0 002.81.7A2 2 0 0122 16.92z'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M22 16.92v3a2 2 0 01-2.18 2 19.79 19.79 0 01-8.63-3.07 19.5 19.5 0 01-6-6 19.79 19.79 0 01-3.07-8.67A2 2 0 014.11 2h3a2 2 0 012 1.72 12.84 12.84 0 00.7 2.81 2 2 0 01-.45 2.11L8.09 9.91a16 16 0 006 6l1.27-1.27a2 2 0 012.11-.45 12.84 12.84 0 002.81.7A2 2 0 0122 16.92z'/%3E%3C/svg%3E") center/contain no-repeat;
  background-color: var(--neon-green, #39ff14);
}

.page-about .about-contact-icon--pin {
  background: var(--metal-gold, #ffd700);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0118 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0118 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E") center/contain no-repeat;
  background-color: var(--metal-gold, #ffd700);
}

.page-about .about-contact-note {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--text-secondary, #b0b8d1);
  font-style: italic;
  margin: 0.3rem 0 0.8rem;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--border-subtle, #2a2f45);
}

.page-about .about-contact-img {
  width: 100%;
  max-width: 240px;
  height: auto;
  object-fit: contain;
  margin: 0.5rem 0 0.2rem;
  opacity: 0.7;
  border-radius: 2px;
}

/* 返回顶部 */
.page-about .about-back-top {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}

.page-about .about-back-top a {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary, #b0b8d1);
  text-decoration: none;
  border-bottom: 1px solid var(--border-subtle, #2a2f45);
  padding-bottom: 0.2rem;
  transition: color 0.2s, border-color 0.2s;
}

.page-about .about-back-top a:hover {
  color: var(--neon-green, #39ff14);
  border-bottom-color: var(--neon-green, #39ff14);
}

/* ===== 桌面端 ≥768px ===== */
@media (min-width: 768px) {
  .page-about .about-layout {
    flex-direction: row;
    min-height: 100vh;
  }

  .page-about .about-brand-panel {
    width: var(--about-panel-width);
    min-width: var(--about-panel-min-width);
    position: sticky;
    top: 0;
    height: 100vh;
    border-bottom: none;
    border-right: 2px solid var(--neon-green, #39ff14);
    padding: 2.5rem 1.8rem;
    align-items: center;
    background-image: repeating-linear-gradient(
      45deg,
      transparent,
      transparent 28px,
      rgba(57, 255, 20, 0.035) 28px,
      rgba(57, 255, 20, 0.035) 29px
    );
  }

  .page-about .about-brand-panel::before {
    height: 100%;
    width: 4px;
    background: linear-gradient(180deg, var(--neon-green, #39ff14), var(--electric-blue, #00d4ff), var(--metal-gold, #ffd700));
    top: 0;
    left: 0;
  }

  .page-about .about-brand-panel-inner {
    max-width: 340px;
    gap: 1rem;
  }

  .page-about .about-brand-logo {
    width: 180px;
    height: 180px;
    padding: 12px;
  }

  .page-about .about-brand-name {
    font-size: 2.8rem;
  }

  .page-about .about-brand-tagline {
    font-size: 1rem;
  }

  .page-about .about-brand-tags li {
    font-size: 0.8rem;
    padding: 0.3rem 1rem;
  }

  .page-about .about-content {
    padding: 2.5rem 2.5rem 4rem 2.5rem;
  }

  .page-about .about-page-title {
    font-size: 2.6rem;
    margin-bottom: 2.5rem;
  }

  .page-about .about-card {
    padding: 2rem 2rem 2rem 2.5rem;
    margin-bottom: 2.2rem;
  }

  .page-about .about-card-label {
    font-size: 3rem;
    top: 0.6rem;
    right: 1rem;
  }

  .page-about .about-card-heading {
    font-size: 1.6rem;
  }

  .page-about .about-card-text {
    font-size: 1rem;
  }

  .page-about .about-contact-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.8rem 1.2rem;
  }

  .page-about .about-contact-item {
    font-size: 1rem;
  }

  .page-about .about-contact-img {
    max-width: 280px;
  }

  .page-about .about-trust-statement {
    font-size: 0.95rem;
    padding: 1rem 1.5rem;
  }
}

/* ===== 大桌面端 ≥1200px ===== */
@media (min-width: 1200px) {
  .page-about .about-brand-panel {
    padding: 3rem 2.5rem;
  }

  .page-about .about-brand-logo {
    width: 220px;
    height: 220px;
    padding: 16px;
  }

  .page-about .about-brand-name {
    font-size: 3.2rem;
  }

  .page-about .about-content {
    padding: 3rem 4rem 5rem 4rem;
  }

  .page-about .about-page-title {
    font-size: 3rem;
  }

  .page-about .about-card {
    padding: 2.5rem 2.8rem 2.5rem 3rem;
  }

  .page-about .about-card-label {
    font-size: 3.6rem;
  }

  .page-about .about-card-heading {
    font-size: 1.8rem;
  }

  .page-about .about-card-text {
    font-size: 1.05rem;
    max-width: 680px;
  }
}