/* ============================================================================
   首页公告弹窗 —— 独立样式表
   不修改演示站任何既有规则；颜色全部复用 :root 设计令牌，保证视觉一致。
   类名统一加 .pi-ann 前缀，避免与演示站样式冲突。
   ========================================================================= */

.pi-ann {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
  background: rgba(29, 29, 31, 0.42);
  -webkit-backdrop-filter: blur(6px) saturate(120%);
  backdrop-filter: blur(6px) saturate(120%);
  animation: pi-ann-fade 0.22s ease-out both;
  font-family: inherit;
}

.pi-ann__card {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  max-width: 432px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 40px 32px 28px;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e5e7eb);
  border-radius: 20px;
  box-shadow:
    0 32px 72px -20px rgba(29, 29, 31, 0.34),
    0 4px 14px rgba(29, 29, 31, 0.06);
  text-align: center;
  animation: pi-ann-rise 0.34s cubic-bezier(0.2, 0.8, 0.25, 1) both;
}

/* ── 关闭按钮 ───────────────────────────────────────────────────────────── */
.pi-ann__close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted, #6e6e73);
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease;
}

.pi-ann__close:hover {
  background: var(--elevated, #f1f3f5);
  color: var(--text, #1d1d1f);
}

.pi-ann__close:focus-visible {
  outline: 2px solid var(--focus, #007aff);
  outline-offset: 2px;
}

/* ── 圆形头像 ───────────────────────────────────────────────────────────── */
.pi-ann__avatar-ring {
  box-sizing: border-box;
  width: 104px;
  height: 104px;
  margin: 0 auto 18px;
  padding: 4px;
  border-radius: 50%;
  background: var(--surface, #fff);
  box-shadow:
    0 0 0 1px var(--border, #e5e7eb),
    0 10px 26px -6px rgba(29, 29, 31, 0.22);
}

.pi-ann__avatar {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--elevated, #f1f3f5);
}

.pi-ann__avatar-fallback {
  display: none;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--text, #1d1d1f);
  color: #fff;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.pi-ann__avatar-ring.is-fallback .pi-ann__avatar {
  display: none;
}

.pi-ann__avatar-ring.is-fallback .pi-ann__avatar-fallback {
  display: grid;
}

/* ── 文案 ───────────────────────────────────────────────────────────────── */
.pi-ann__eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--elevated, #f1f3f5);
  color: var(--muted, #6e6e73);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.pi-ann__title {
  margin: 0;
  color: var(--text, #1d1d1f);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.pi-ann__sub {
  margin: 7px 0 0;
  color: var(--muted, #6e6e73);
  font-size: 13px;
  line-height: 1.6;
}

/* ── 项目集跳转入口 ─────────────────────────────────────────────────────── */
.pi-ann__link {
  display: flex;
  align-items: center;
  gap: 12px;
  box-sizing: border-box;
  margin-top: 24px;
  padding: 14px 16px;
  border: 1px solid #cfe0f7;
  border-radius: 12px;
  background: var(--soft, #edf4ff);
  text-align: left;
  text-decoration: none;
  transition: border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}

.pi-ann__link:hover {
  border-color: #a9c9f0;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -8px rgba(0, 102, 204, 0.45);
}

.pi-ann__link:focus-visible {
  outline: 2px solid var(--focus, #007aff);
  outline-offset: 2px;
}

.pi-ann__link-body {
  flex: 1 1 auto;
  min-width: 0;
}

.pi-ann__link-title {
  display: block;
  color: var(--text, #1d1d1f);
  font-size: 14px;
  font-weight: 500;
}

.pi-ann__link-url {
  display: block;
  margin-top: 2px;
  color: var(--accent, #0066cc);
  font-size: 12px;
}

.pi-ann__link-arrow {
  flex: 0 0 auto;
  color: var(--accent, #0066cc);
  transition: transform 0.16s ease;
}

.pi-ann__link:hover .pi-ann__link-arrow {
  transform: translateX(3px);
}

/* ── 免责声明 ───────────────────────────────────────────────────────────── */
.pi-ann__notice {
  margin-top: 18px;
  padding: 13px 15px;
  border: 1px solid #f2dcb4;
  border-radius: 12px;
  background: var(--warning-bg, #fff5e4);
  text-align: left;
}

.pi-ann__notice-strong {
  display: block;
  color: var(--warning, #8a5500);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.pi-ann__notice-text {
  margin: 5px 0 0;
  color: var(--warning, #8a5500);
  font-size: 12px;
  line-height: 1.7;
  opacity: 0.8;
}

/* ── 主按钮 ─────────────────────────────────────────────────────────────── */
.pi-ann__cta {
  display: block;
  width: 100%;
  height: 46px;
  margin-top: 22px;
  border: 0;
  border-radius: 12px;
  background: var(--text, #1d1d1f);
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.16s ease, transform 0.1s ease;
}

.pi-ann__cta:hover {
  background: #000;
}

.pi-ann__cta:active {
  transform: scale(0.992);
}

.pi-ann__cta:focus-visible {
  outline: 2px solid var(--focus, #007aff);
  outline-offset: 2px;
}

/* ── 动效 ───────────────────────────────────────────────────────────────── */
@keyframes pi-ann-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pi-ann-rise {
  from { opacity: 0; transform: translateY(12px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── 移动端 ─────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .pi-ann {
    padding: 16px;
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }

  .pi-ann__card {
    max-height: calc(100vh - 32px);
    padding: 32px 22px 22px;
    border-radius: 18px;
  }

  .pi-ann__avatar-ring {
    width: 88px;
    height: 88px;
    margin-bottom: 16px;
  }

  .pi-ann__title {
    font-size: 19px;
  }
}

/* ── 无障碍：尊重系统的减少动效设置 ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .pi-ann,
  .pi-ann__card {
    animation: none;
  }

  .pi-ann__link,
  .pi-ann__link-arrow,
  .pi-ann__cta,
  .pi-ann__close {
    transition: none;
  }

  .pi-ann__link:hover {
    transform: none;
  }

  .pi-ann__link:hover .pi-ann__link-arrow {
    transform: none;
  }
}