/* ========================================
   星屿科技 · 组件样式
   按钮、标签、卡片基础
   ======================================== */

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  line-height: 1;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
  min-height: 48px;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

/* hover 扩散填充层（ruimacode clip-path 圆形展开） */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  clip-path: circle(0% at 50% 50%);
  transition: clip-path 0.7s cubic-bezier(0, 0.96, 0.58, 1.1);
  pointer-events: none;
}

.btn:hover::after {
  clip-path: circle(100% at 50% 50%);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.25);
}

.btn-primary::after {
  background: var(--color-accent-deep);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-hover);
}

.btn-secondary::after {
  background: rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* ── 标签 ── */
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: rgba(14, 165, 233, 0.08);
  color: var(--color-accent-deep);
  border-radius: var(--radius-full);
  border: 1px solid rgba(14, 165, 233, 0.15);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ── 数字统计 ── */
.stat-number {
  font-family: var(--font-mono);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* ── 卡片基础 ── */
.card {
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition:
    transform var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-card-hover);
}

/* ── 联系信息 ── */
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.contact-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-value {
  color: var(--color-text-secondary);
}

/* ── Loading ── */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--color-bg);
  transition: opacity 500ms var(--ease-out-expo);
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-brand {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: 0.15em;
  opacity: 0;
}

.loading-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  opacity: 0;
}

/* ── 团队卡片 ── */
.team-card {
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-card);
  /* transform 交给 GSAP 管理，CSS 不再 transition transform */
  transition:
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.team-card:hover {
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-card-hover);
}

.team-card.focused {
  border-color: var(--color-accent);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.12);
}

.team-card .member-name {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.team-card .member-role {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: var(--font-medium);
  letter-spacing: 0.05em;
}

.team-card .member-desc {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 0.5s var(--ease-out-expo),
    opacity 0.4s var(--ease-out-expo) 0.1s,
    margin-top 0.5s var(--ease-out-expo);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  text-align: left;
}

.team-card .member-desc::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
  margin-bottom: var(--space-3);
  opacity: 0.5;
}

.team-card:hover .member-desc,
.team-card.focused .member-desc {
  max-height: 300px;
  opacity: 1;
  margin-top: var(--space-4);
}

/* ── 悬浮导航 + 进度环 ── */
.floating-nav {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-6);
  z-index: var(--z-nav);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.floating-nav.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.fab-progress {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  position: relative;
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.fab-progress:hover {
  border-color: var(--color-border-accent);
  box-shadow: 0 6px 24px rgba(14, 165, 233, 0.15);
  transform: translateY(-2px);
}

.fab-ring-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.fab-ring-bg {
  stroke: var(--color-border);
}

.fab-ring-fill {
  stroke: var(--color-accent);
  transition: stroke-dashoffset 100ms linear;
}

.fab-icon {
  position: relative;
  z-index: 1;
}