/* ========================================
   About TigerWing page
   Scoped to .page-about only
   ======================================== */

.page-about .site-header,
.page-about .site-header.is-scrolled,
.page-about .site-header.is-menu-open,
.page-about .site-header:hover {
  background: var(--white);
  box-shadow: var(--shadow-header);
}

.page-about .main-nav a,
.page-about .site-header:hover .main-nav a,
.page-about .site-header.is-scrolled .main-nav a,
.page-about .site-header.is-menu-open .main-nav a {
  color: var(--text-muted) !important;
}

.page-about .main-nav a.active,
.page-about .main-nav a:hover,
.page-about .site-header:hover .main-nav a.active,
.page-about .site-header:hover .main-nav a:hover,
.page-about .site-header.is-scrolled .main-nav a.active,
.page-about .site-header.is-scrolled .main-nav a:hover {
  color: var(--primary) !important;
}

.page-about .lang-item,
.page-about .site-header:hover .lang-item,
.page-about .site-header.is-scrolled .lang-item,
.page-about .site-header.is-menu-open .lang-item {
  color: var(--text-muted);
}

.page-about .lang-item.is-active,
.page-about .lang-item:hover {
  color: var(--primary);
}

.page-about .lang-divider {
  background: var(--border-lang);
}

.page-about .icon-btn img,
.page-about .nav-chevron {
  filter: brightness(0) saturate(100%);
  opacity: 0.65;
}

.page-about .nav-toggle span {
  background: var(--text-muted);
  box-shadow: none;
}

.page-about .ab-wrap {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 80px);
  box-sizing: border-box;
}

/* ---------- Hero / intro (match semi-managed) ---------- */
.page-about .ab-hero {
  padding: calc(var(--header-h) + 98px) 0 56px;
  background: var(--white);
  overflow-x: clip;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 48px 64px;
  align-items: center;
  margin-bottom: 56px;
}

.page-about .ab-hero h1 {
  margin: 0;
  font-size: 60px;
  font-weight: 400;
  line-height: 1.35;
  color: var(--text-dark);
  letter-spacing: 0.02em;
}

.page-about .ab-hero__panel {
  border-left: 1px solid #c9cdd3;
  padding: 0 40px;
}

.page-about .ab-hero__panel p {
  margin: 0 0 50px;
  font-size: 18px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .ab-hero__more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 4px 4px 14px;
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.4;
  color: #666;
  background: transparent;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}

.page-about .ab-hero__more-icon {
  --arrow: var(--white);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
  transition: background 0.3s ease;
}

.page-about .ab-hero__more-icon img {
  width: 11px;
  height: 11px;
  display: block;
  opacity: 0;
}

.page-about .ab-hero__more-icon::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 11px;
  background: var(--arrow);
  -webkit-mask: url("../images/icon_banner.svg") center / contain no-repeat;
  mask: url("../images/icon_banner.svg") center / contain no-repeat;
  transition:
    background 0.3s ease,
    transform 0.3s ease;
}

.page-about .ab-hero__more:hover {
  background: var(--primary);
  color: var(--white);
}

.page-about .ab-hero__more:hover .ab-hero__more-icon {
  --arrow: var(--primary);
  background: var(--white);
}

.page-about .ab-hero__more:hover .ab-hero__more-icon svg path {
  fill: var(--primary);
}

.page-about .ab-hero__banner-track {
  width: 100%;
  margin-top: 8px;
}

.page-about .ab-hero__banner {
  --ab-banner-inset: clamp(20px, 4vw, 80px);
  width: calc(100vw - (var(--ab-banner-inset) * 2));
  max-width: calc(1600px - (var(--ab-banner-inset) * 2));
  margin-left: auto;
  margin-right: auto;
  overflow: hidden;
  border-radius: 8px;
  background: #ececec;
  will-change: width, max-width, border-radius, margin;
  transform: translateZ(0);
}

.page-about .ab-hero__banner img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  object-position: center center;
}

/* ---------- Shared section shell ---------- */
.page-about .ab-section {
  padding: 88px 0;
  background: var(--white);
}

.page-about .ab-section + .ab-section {
  border-top: 1px solid #e5e5e5;
}

.page-about .ab-section--soft {
  background: #ffffff;
}

.page-about .ab-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.78fr) minmax(0, 1.6fr);
  column-gap: clamp(48px, 6vw, 96px);
  align-items: start;
}

.page-about .ab-side h2 {
  margin: 0 0 10px;
  font-size: clamp(28px, 2.4vw, 32px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--text-dark);
}

.page-about .ab-side__en {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
  line-height: 1.5;
}

.page-about .ab-side__desc {
  margin: 20px 0 0;
  max-width: 18em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- Intro / 虎翼 ---------- */
.page-about #about-intro .ab-side {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  z-index: 2;
}

.page-about #about-intro .ab-side__en {
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 16px;
  color: var(--text-muted);
}

.page-about .ab-intro__copy {
  padding-bottom: 48px;
  border-bottom: 1px solid #e5e5e5;
}

.page-about .ab-intro__copy p {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-muted);
}

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

.page-about .ab-intro__bottom {
  display: grid;
  grid-template-columns: minmax(180px, 0.42fr) minmax(0, 1.58fr);
  gap: 28px 40px;
  align-items: stretch;
  margin-top: 48px;
}

.page-about .ab-stats {
  display: flex;
  flex-direction: column;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  background: var(--white);
  min-height: 100%;
  align-self: stretch;
}

.page-about .ab-stat {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  text-align: center;
  border-bottom: 1px solid #e5e5e5;
  box-sizing: border-box;
}

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

.page-about .ab-stat strong {
  display: block;
  font-size: clamp(36px, 2.8vw, 36px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--primary);
}

.page-about .ab-stat span {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: #999;
}

.page-about .ab-intro__gallery {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.page-about .ab-intro__media {
  overflow: hidden;
  border-radius: 8px;
  background: #eef3f9;
}

.page-about .ab-intro__media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- Events / 团队事业部 ---------- */
.page-about .ab-events {
  display: flex;
  flex-direction: column;
  gap: 64px;
}

.page-about .ab-event {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 28px 40px;
  align-items: start;
}

.page-about .ab-event__media {
  overflow: hidden;
  border-radius: 8px;
  background: #eef3f9;
  width: max-content;
  max-width: 100%;
}

.page-about .ab-event__media img {
  width: auto;
  height: auto;
  max-width: 100%;
  display: block;
}

.page-about .ab-event > div {
  max-width: 34em;
}

.page-about .ab-event h3 {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 500;
  color: var(--text-dark);
  line-height: 1.4;
}

.page-about .ab-event p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- Faculty / 我们的故事 ---------- */
.page-about .ab-faculty__title {
  margin: 0 0 40px;
  font-size: clamp(28px, 2.4vw, 32px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--text-dark);
}

.page-about .ab-faculty-card {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1.2fr);
  align-items: stretch;
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(20, 40, 80, 0.06);
  min-height: 580px;
}

.page-about .ab-faculty-card__content {
  display: flex;
  flex-direction: column;
  padding: 64px 48px 48px 56px;
  box-sizing: border-box;
  min-width: 0;
}

.page-about .ab-faculty-card__tag {
  margin: 0;
  font-size: 18px;
  line-height: 1.5;
  color: var(--text-light);
  transition: opacity 0.25s ease;
}

.page-about .ab-faculty-card__content h3 {
  margin: 18px 0 20px;
  max-width: 14em;
  font-size: clamp(24px, 2.2vw, 30px);
  font-weight: 400;
  line-height: 1.35;
  color: var(--text-dark);
  transition: opacity 0.25s ease;
}

.page-about .ab-faculty-card__desc {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
  transition: opacity 0.25s ease;
}

.page-about .ab-faculty__nav {
  display: flex;
  gap: 12px;
  margin-top: auto;
  padding-top: 56px;
}

.page-about .ab-faculty__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: #eceff3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #5b6470;
  cursor: pointer;
  transition:
    background 0.25s ease,
    color 0.25s ease;
}

.page-about .ab-faculty__btn svg {
  width: 16px;
  height: 16px;
  display: block;
}

.page-about .ab-faculty__btn:hover {
  background: var(--primary);
  color: var(--white);
}

.page-about .ab-faculty-card__media {
  position: relative;
  min-height: 580px;
  background: #eef3f9;
  overflow: hidden;
}

.page-about .ab-faculty-card__media img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: opacity 0.25s ease;
}

.page-about .ab-faculty-card.is-switching .ab-faculty-card__tag,
.page-about .ab-faculty-card.is-switching .ab-faculty-card__content h3,
.page-about .ab-faculty-card.is-switching .ab-faculty-card__desc,
.page-about .ab-faculty-card.is-switching .ab-faculty-card__media img {
  opacity: 0;
}

/* ---------- Reviews / 客户口碑 ---------- */
.page-about #about-reviews .ab-side {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  z-index: 2;
  align-self: start;
}

.page-about #about-reviews .ab-side__label {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-light);
}

.page-about .ab-reviews {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .ab-review {
  --stack: 0;
  position: sticky;
  top: calc(var(--header-h) + 24px + (var(--stack) * 14px));
  z-index: calc(10 + var(--stack));
  display: grid;
  grid-template-columns: minmax(140px, 0.34fr) minmax(0, 1fr);
  gap: 28px 48px;
  align-items: start;
  margin-bottom: 56px;
  padding: 48px 44px 56px;
  background: var(--white);
  border: 1px solid #e8e8e8;
  border-radius: 16px;
  box-sizing: border-box;
  box-shadow: 0 10px 36px rgba(20, 40, 80, 0.06);
}

.page-about .ab-review:nth-child(1) { --stack: 0; }
.page-about .ab-review:nth-child(2) { --stack: 1; }
.page-about .ab-review:nth-child(3) { --stack: 2; }
.page-about .ab-review:nth-child(4) { --stack: 3; }

.page-about .ab-review:last-child {
  margin-bottom: 0;
}

.page-about .ab-review__logo {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}

.page-about .ab-review__logo img {
  width: auto;
  max-width: 100%;
  max-height: 52px;
  height: auto;
  display: block;
  object-fit: contain;
  object-position: left top;
}

.page-about .ab-review__body {
  position: relative;
  min-width: 0;
}

.page-about .ab-review__quote {
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dark);
}

.page-about .ab-review__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .ab-review__avatar {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  background: #eef3f9;
}

.page-about .ab-review__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .ab-review__meta strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-dark);
}

.page-about .ab-review__meta span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-light);
}

/* ---------- Feedback / 心声 ---------- */
.page-about .ab-feedbacks {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .ab-feedback {
  display: grid;
  grid-template-columns: 69px minmax(0, 1fr);
  gap: 8px 18px;
  align-items: start;
  padding: 48px 0;
  border-bottom: 1px solid #eeeeee;
}

.page-about .ab-feedback:first-child {
  padding-top: 0;
}

.page-about .ab-feedback:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-about .ab-feedback__avatar {
  width: 69px;
  height: 69px;
  border-radius: 50%;
  overflow: hidden;
  background: #eef3f9;
}

.page-about .ab-feedback__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .ab-feedback__meta {
  padding-top: 10px;
}

.page-about .ab-feedback__meta strong {
  display: block;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-dark);
  line-height: 1.4;
}

.page-about .ab-feedback__meta span {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--primary);
}

.page-about .ab-feedback__quote {
  grid-column: 1 / -1;
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted);
}

/* ---------- Join CTA override ---------- */
.page-about .footer-cta__inner h2 {
  max-width: 11em;
}

.page-about .footer-contact-btn__label {
  font-size: 18px;
}

@media (max-width: 1100px) {
  .page-about .ab-hero {
    padding: calc(var(--header-h) + 32px) 0 40px;
  }

  .page-about .ab-hero__grid,
  .page-about .ab-grid,
  .page-about .ab-intro__bottom,
  .page-about .ab-event {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-about .ab-intro__copy {
    padding-bottom: 32px;
  }

  .page-about .ab-intro__bottom {
    margin-top: 32px;
  }

  .page-about #about-intro .ab-side {
    position: static;
  }

  .page-about #about-reviews .ab-side {
    position: static;
  }

  .page-about .ab-review {
    position: static;
    top: auto;
    z-index: auto;
    margin-bottom: 20px;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 28px 24px;
    box-shadow: none;
  }

  .page-about .ab-review:last-child {
    margin-bottom: 0;
  }

  .page-about .ab-review__logo {
    justify-content: flex-start;
    min-height: 0;
  }

  .page-about .ab-stats {
    min-height: 0;
  }

  .page-about .ab-stat {
    flex: none;
    padding: 28px 20px;
  }

  .page-about .ab-hero__grid {
    margin-bottom: 40px;
  }

  .page-about .ab-hero h1 {
    font-size: 28px;
  }

  .page-about .ab-hero__panel {
    padding: 0 0 0 20px;
  }

  .page-about .ab-hero__panel p {
    margin: 0 0 30px;
    font-size: 16px;
  }

  .page-about .ab-hero__banner-track {
    padding: 0 clamp(20px, 4vw, 80px);
    box-sizing: border-box;
  }

  .page-about .ab-hero__banner {
    width: 100%;
    max-width: none;
    border-radius: 4px;
  }

  .page-about .ab-section {
    padding: 56px 0;
  }

  .page-about .ab-side__desc {
    max-width: none;
  }

  .page-about .ab-events {
    gap: 40px;
  }

  .page-about .ab-event {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .page-about .ab-event > div {
    max-width: none;
  }

  .page-about .ab-event__media {
    width: 100%;
    max-width: 100%;
  }

  .page-about .ab-event__media img {
    width: 100%;
    height: auto;
  }

  .page-about .ab-faculty__title {
    margin-bottom: 24px;
  }

  .page-about .ab-faculty-card {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .page-about .ab-faculty-card__content {
    padding: 28px 24px 24px;
  }

  .page-about .ab-faculty-card__content h3 {
    max-width: none;
    margin: 12px 0 16px;
  }

  .page-about .ab-faculty__nav {
    padding-top: 28px;
  }

  .page-about .ab-faculty-card__media {
    position: relative;
    min-height: 280px;
    order: -1;
  }

  .page-about .ab-faculty-card__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    object-fit: cover;
  }
}