/* ================================================================
   LXMUN · contact.css
   联系我们页面专属样式
   依赖: global.css, components.css
   ================================================================ */


.contact-hero {
  position: relative;
  min-height: 52vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--navbar-h);
  padding-bottom: var(--space-2xl);
  text-align: center;
  background:
    linear-gradient(to right, rgba(0, 31, 92, 0.82) 0%, rgba(0, 49, 117, 0.65) 100%),
    url('../../media/contact_portal_hero.png') center / cover no-repeat;
}

.contact-hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding-inline: var(--container-pad);
}

.contact-hero__eyebrow {
  font-family: var(--font-latin);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.contact-hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.18em;
  line-height: 1.1;
}

.contact-hero__subtitle {
  font-family: var(--font-latin);
  font-size: clamp(0.85rem, 1.4vw, 1.05rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.04em;
  max-width: 480px;
}

/* NATO 风格底部色条 */
.contact-hero__bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(to right, transparent, var(--color-divider), transparent);
}


/* ── Contact Section ──────────────────────────────────────────────
   【可修改背景】
   修改下方 background 属性可更换该区块的背景色或图片。
   默认为浅灰色背景。
   ────────────────────────────────────────────────────────────── */
.contact-section {
  /* ↓↓↓ 修改此处更换联系方式区块背景 ↓↓↓ */
  /* background: var(--color-bg-muted); */
  /* 若需背景图，使用如下格式（取消注释并填写路径）： */
  background:
    linear-gradient(rgba(255,255,255,0.92), rgba(255,255,255,0.92)),
    url('../../media/logoNoBg.png') center / 50% no-repeat;

  /* ↑↑↑ 修改此处更换联系方式区块背景 ↑↑↑ */
}


/* ── Contact Grid ── */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}


/* ── Contact Card ── */

.contact-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: visible;
}

/* 顶部色条 */
.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--color-accent), var(--color-link));
  border-radius: var(--radius-lg) var(--radius-lg) 0;
}

.contact-card:hover {
  box-shadow: var(--shadow-raised);
  transform: translateY(-4px);
}

/* 图标圆形容器 */
.contact-card__icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e8f0fb, #c6d8f5);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-bottom: var(--space-xs);
}

.contact-card__icon {
  width: 30px;
  height: 30px;
  color: var(--color-accent);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-card__title {
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.contact-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 220px;
}

/* Email 链接 */
.contact-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-xs);
  padding: 10px 22px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-link);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition:
    background var(--transition-base),
    color var(--transition-base);
}

.contact-card__link:hover {
  background: var(--color-accent);
  color: #fff;
}

.contact-card__link-arrow {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition-base);
}

.contact-card__link:hover .contact-card__link-arrow {
  transform: translateX(3px);
}

/* 二维码 */
.contact-card__qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}

.contact-card__qr img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid #dde4f0;
}

.contact-card__qr-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
}


/* ── Responsive ── */

/* Tablet (≤900px): 单列或两列 */
@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
  .contact-hero {
    min-height: 44vh;
  }
}

/* ── Email 下拉选择器 ── */

.email-select {
  position: relative;
  width: 100%;
  max-width: 260px;
  margin-top: var(--space-xs);
}

.email-select__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  padding: 10px 14px;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-chinese);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  transition:
    background var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.email-select__trigger:hover {
  background: var(--color-bg-hover);
}

.email-select__trigger[aria-expanded="true"] {
  border-color: var(--color-link);
  box-shadow: 0 0 0 3px rgba(17, 138, 203, 0.15);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.email-select__label {
  flex: 1;
  text-align: left;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.email-select__label.is-selected {
  color: var(--color-primary);
}

.email-select__chevron {
  width: 16px;
  height: 16px;
  stroke: var(--color-accent);
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.email-select__trigger[aria-expanded="true"] .email-select__chevron {
  transform: rotate(180deg);
}

/* 下拉列表 */
.email-select__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border: 2px solid var(--color-link);
  border-top: none;
  border-bottom-left-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: var(--shadow-raised);
  z-index: 50;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition:
    max-height 0.28s ease,
    opacity 0.22s ease,
    transform 0.22s ease;
}

.email-select__dropdown.is-open {
  max-height: 280px;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.email-select__option {
  padding: 11px 14px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  border-bottom: 1px solid #eaeff8;
  transition: background var(--transition-base), color var(--transition-base);
  text-align: left;
}

.email-select__option:last-child {
  border-bottom: none;
}

.email-select__option:hover {
  background: var(--color-bg-hover);
  color: var(--color-link);
}

.email-select__option.is-active {
  background: #e8f0fb;
  color: var(--color-accent);
  font-weight: 700;
}

/* 发送按钮：未选中时禁用 */
.email-send-btn[aria-disabled="true"] {
  opacity: 0.4;
  pointer-events: none;
}

.email-send-btn[aria-disabled="false"] {
  opacity: 1;
  pointer-events: auto;
}