/* ============================================================
   about.css — 关于强联页专属样式（v3.0 首页完整签名风）
   完整套用首页 home63.css 卡片语言：155° 对角渐变 + 四角角标 + 双层阴影 + 圆形内发光图标。
   依赖：base.css、layout.css、dark-base.css。
   ============================================================ */

/* ========== INTRO 公司介绍 ========== */
.intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.intro-text p { font-size: 15px; color: rgba(255, 255, 255, 0.72); line-height: 1.95; margin-bottom: 18px; }
.intro-text p strong { color: var(--lake-light); font-weight: 700; }
.intro-highlight {
  position: relative; margin-top: 28px; padding: 22px 26px;
  border-radius: 10px;
  border: 1px solid rgba(12, 161, 184, 0.2);
  background: linear-gradient(155deg, rgba(12, 161, 184, 0.1) 0%, rgba(10, 22, 40, 0.5) 60%, rgba(5, 13, 26, 0.55) 100%);
  backdrop-filter: blur(8px);
  border-left: 3px solid var(--lake);
  font-size: 14px; color: rgba(255, 255, 255, 0.78); line-height: 1.9;
}
.intro-image {
  position: relative;
  aspect-ratio: 1 / 1;
}
.intro-image canvas { width: 100%; height: 100%; display: block; }

/* ========== STATS BAR 核心数据（数据卡范式：强青色渐变） ========== */
.stats-bar { padding: 64px 24px; }
.stats-grid { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-box {
  position: relative; text-align: center; padding: 28px 16px; border-radius: 14px;
  border: 1px solid rgba(12, 161, 184, 0.34);
  background: linear-gradient(155deg, rgba(12, 161, 184, 0.17) 0%, rgba(10, 22, 40, 0.55) 55%, rgba(5, 13, 26, 0.6) 100%);
  backdrop-filter: blur(10px) saturate(1.15);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.32), inset 0 1px 0 rgba(93, 194, 210, 0.16), inset 0 0 40px rgba(12, 161, 184, 0.06);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
/* 数据卡四角角标（强） */
.stat-box::before,
.stat-box::after {
  content: ''; position: absolute; width: 12px; height: 12px;
  border-color: rgba(93, 194, 210, 0.6); border-style: solid;
  transition: border-color 0.4s var(--ease); z-index: 1;
}
.stat-box::before { top: 8px; left: 8px; border-width: 1px 0 0 1px; }
.stat-box::after { bottom: 8px; right: 8px; border-width: 0 1px 1px 0; }
.stat-box:hover {
  transform: translateY(-5px);
  border-color: var(--lake-light);
  box-shadow: 0 18px 44px rgba(12, 161, 184, 0.28), inset 0 2px 0 rgba(93, 194, 210, 0.32);
}
.stat-box:hover::before,
.stat-box:hover::after { border-color: var(--lake-light); }
.stat-box .stat-num {
  font-family: var(--font-en); font-size: clamp(30px, 4vw, 44px); font-weight: 700;
  color: var(--lake-light); line-height: 1;
  text-shadow: 0 0 18px rgba(12, 161, 184, 0.5);
}
.stat-box .stat-num .stat-unit { font-size: 0.5em; color: var(--lake); margin-left: 2px; }
.stat-box .label { font-size: 13px; color: rgba(255, 255, 255, 0.6); margin-top: 12px; letter-spacing: 1px; }

/* ========== TIMELINE 发展历程 ========== */
.timeline-section { overflow: hidden; }
.timeline { position: relative; max-width: 1000px; margin: 0 auto; padding: 20px 0; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, transparent, var(--lake) 8%, var(--lake) 92%, transparent);
  transform: translateX(-50%);
}
.tl-item { position: relative; width: 50%; padding: 0 48px 56px 0; }
.tl-item:nth-child(even) { left: 50%; padding: 0 0 56px 48px; }
.tl-node {
  position: absolute; top: 4px; right: -9px; width: 18px; height: 18px;
  border-radius: 50%; background: var(--lake);
  border: 3px solid var(--deep);
  box-shadow: 0 0 0 4px rgba(12, 161, 184, 0.18), 0 0 14px rgba(12, 161, 184, 0.6);
  z-index: 2;
}
.tl-item:nth-child(even) .tl-node { right: auto; left: -9px; }
.tl-node::before {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  border: 2px solid var(--lake); animation: pulse-ring 2.5s ease-in-out infinite;
}
/* tl-card 保留指向轴的三角箭头（::before），背景升级为渐变签名底 */
.tl-card {
  background: linear-gradient(155deg, rgba(12, 161, 184, 0.07) 0%, rgba(10, 22, 40, 0.5) 60%, rgba(5, 13, 26, 0.55) 100%);
  border: 1px solid rgba(12, 161, 184, 0.18);
  border-radius: 12px; padding: 24px 28px;
  backdrop-filter: blur(10px) saturate(1.15);
  -webkit-backdrop-filter: blur(10px) saturate(1.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(93, 194, 210, 0.08);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease); position: relative;
}
.tl-card::before {
  content: ''; position: absolute; top: 12px; width: 14px; height: 14px;
  background: var(--deep-mid);
  border-right: 1px solid rgba(12, 161, 184, 0.3); border-top: 1px solid rgba(12, 161, 184, 0.3);
  right: -8px; transform: rotate(45deg);
}
.tl-item:nth-child(even) .tl-card::before { right: auto; left: -8px; transform: rotate(-135deg); }
.tl-card:hover {
  transform: translateY(-3px);
  border-color: rgba(93, 194, 210, 0.45);
  box-shadow: 0 16px 44px rgba(12, 161, 184, 0.22), inset 0 2px 0 rgba(93, 194, 210, 0.32);
}
.tl-year {
  font-family: var(--font-en); font-size: 30px; font-weight: 700;
  color: var(--lake-light); line-height: 1; margin-bottom: 12px; letter-spacing: 1px;
  text-shadow: 0 0 14px rgba(93, 194, 210, 0.4);
}
.tl-event { font-size: 14px; color: rgba(255, 255, 255, 0.72); line-height: 1.85; }
.tl-event strong { color: var(--white); font-weight: 700; }

/* ========== TEAM 管理团队 ========== */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.team-card {
  position: relative; overflow: hidden; border-radius: 14px;
  border: 1px solid rgba(12, 161, 184, 0.18);
  background: linear-gradient(155deg, rgba(12, 161, 184, 0.07) 0%, rgba(10, 22, 40, 0.5) 60%, rgba(5, 13, 26, 0.55) 100%);
  backdrop-filter: blur(10px) saturate(1.15);
  -webkit-backdrop-filter: blur(10px) saturate(1.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(93, 194, 210, 0.08);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
/* 四角角标 */
.team-card::before,
.team-card::after {
  content: ''; position: absolute; width: 12px; height: 12px;
  border-color: rgba(93, 194, 210, 0.45); border-style: solid;
  transition: border-color 0.4s var(--ease); z-index: 2;
}
.team-card::before { top: 8px; left: 8px; border-width: 1px 0 0 1px; }
.team-card::after { bottom: 8px; right: 8px; border-width: 0 1px 1px 0; }
.team-card:hover {
  transform: translateY(-6px);
  border-color: rgba(93, 194, 210, 0.45);
  box-shadow: 0 18px 44px rgba(12, 161, 184, 0.2), inset 0 2px 0 rgba(93, 194, 210, 0.32);
}
.team-card:hover::before,
.team-card:hover::after { border-color: var(--lake-light); }
.team-avatar {
  width: 100%; aspect-ratio: 1/1; max-width: 160px; margin: 36px auto 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--deep-mid), var(--deep-soft));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-size: 52px; font-weight: 700; color: var(--lake-light);
  border: 2px solid rgba(12, 161, 184, 0.28);
  box-shadow: 0 0 24px rgba(12, 161, 184, 0.2), inset 0 0 20px rgba(12, 161, 184, 0.12);
  position: relative;
}
.team-avatar::after {
  content: ''; position: absolute; inset: -8px; border-radius: 50%;
  border: 1px dashed rgba(12, 161, 184, 0.4);
}
.team-avatar .team-photo {
  width: 100%; height: 100%; object-fit: cover; border-radius: 50%;
  display: block;
}
.team-info { padding: 24px 28px 36px; text-align: center; }
.team-name {
  font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 4px; letter-spacing: 1px;
  text-shadow: 0 0 12px rgba(93, 194, 210, 0.3);
}
.team-name-en { font-family: var(--font-en); font-size: 12px; color: var(--lake); letter-spacing: 2px; margin-bottom: 10px; }
.team-role {
  display: inline-block; font-size: 12px; color: var(--lake-light);
  background: rgba(12, 161, 184, 0.12);
  border: 1px solid rgba(12, 161, 184, 0.28);
  padding: 4px 12px; border-radius: 3px; margin-bottom: 16px;
}
.team-bio { font-size: 13px; color: rgba(255, 255, 255, 0.68); line-height: 1.85; text-align: left; }
.team-bio strong { color: var(--lake-light); }
.team-bio ul { list-style: none; margin: 0; padding: 0; }
.team-bio ul li {
  position: relative; padding-left: 18px; margin-bottom: 9px;
  text-align: justify; text-justify: inter-ideograph; line-height: 1.75;
}
.team-bio ul li:last-child { margin-bottom: 0; }
.team-bio ul li::before {
  content: '▸'; position: absolute; left: 0; top: 0;
  color: var(--lake-light); font-size: 13px; line-height: 1.75;
}

/* ========== CONTACT 联系方式（info-card 本就深色，保持；icon 圆形+内发光） ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: stretch; }
.contact-info-card {
  position: relative;
  background: linear-gradient(160deg, var(--deep-mid), var(--deep));
  border: 1px solid var(--glass-border);
  border-radius: 16px; padding: 40px; color: var(--white);
  overflow: hidden;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(93, 194, 210, 0.12);
}
.contact-info-card::before {
  content: ''; position: absolute; top: -100px; right: -100px; width: 300px; height: 300px;
  border-radius: 50%; background: radial-gradient(circle, rgba(12, 161, 184, 0.22), transparent 70%);
}
.contact-info-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 28px; position: relative; letter-spacing: 1px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 24px; position: relative; }
.contact-icon {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: 50%;
  background: rgba(12, 161, 184, 0.16);
  border: 1px solid rgba(12, 161, 184, 0.3);
  display: flex; align-items: center; justify-content: center;
  color: var(--lake-light);
  box-shadow: inset 0 0 12px rgba(12, 161, 184, 0.16);
}
.contact-text-label { font-size: 12px; color: rgba(255, 255, 255, 0.5); margin-bottom: 4px; letter-spacing: 1px; }
.contact-text-val { font-size: 15px; color: rgba(255, 255, 255, 0.9); line-height: 1.6; }
.map-wrapper {
  border-radius: 16px; overflow: hidden; min-height: 380px;
  background: linear-gradient(135deg, var(--deep-mid), var(--deep-soft));
  border: 1px solid var(--glass-border); position: relative;
  display: flex; align-items: center; justify-content: center;
}
.map-placeholder { text-align: center; color: rgba(255, 255, 255, 0.4); }
.map-placeholder svg { margin: 0 auto 16px; opacity: 0.5; }
.map-placeholder p { font-size: 14px; }
.map-placeholder span { font-size: 12px; color: rgba(255, 255, 255, 0.25); display: block; margin-top: 6px; }

/* ========== MESSAGE 留言板 ========== */
.message-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: center; }
.message-intro h2 { margin-bottom: 20px; }
.message-intro p { font-size: 15px; color: rgba(255, 255, 255, 0.68); line-height: 1.9; margin-bottom: 16px; }
.message-form {
  position: relative; padding: 40px; border-radius: 14px;
  border: 1px solid rgba(12, 161, 184, 0.18);
  background: linear-gradient(155deg, rgba(12, 161, 184, 0.07) 0%, rgba(10, 22, 40, 0.5) 60%, rgba(5, 13, 26, 0.55) 100%);
  backdrop-filter: blur(10px) saturate(1.15);
  -webkit-backdrop-filter: blur(10px) saturate(1.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(93, 194, 210, 0.08);
}

/* ========== RESPONSIVE (about) ========== */
@media (max-width: 1024px) {
  .intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid, .message-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .page-hero { min-height: 50vh; padding: calc(var(--nav-h) + 40px) 20px 60px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-box { padding: 20px 12px; }
  .timeline::before { left: 20px; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; left: 0; padding: 0 0 40px 56px; }
  .tl-node, .tl-item:nth-child(even) .tl-node { left: 11px; right: auto; }
  .tl-card::before, .tl-item:nth-child(even) .tl-card::before { right: auto; left: -8px; transform: rotate(-135deg); }
  .team-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .team-avatar { max-width: 130px; }
  .contact-info-card, .message-form { padding: 28px 24px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
}