/* ===========================================================
   公告组件（announcement）样式
   - 使用 AeroCore 主题 CSS 变量，浅色/深色自动切换
   - 响应式：移动端自动收窄间距、缩小字号
   - 类型色：info / success / warning / danger
   - 增强：滚动置顶(sticky) / 自动消失倒计时(progress) / 多条轮播(carousel)
   =========================================================== */

/* ---------- 外层包裹：置顶 / 自动消失 / 轮播控制 ---------- */
.aero-ann-wrap {
    position: relative;
    margin: 0 0 16px;
}
.aero-ann-wrap--sticky {
    position: sticky;
    top: 0;
    z-index: 999;
}
.aero-ann-wrap.is-dismissed {
    display: none;
}

/* ---------- 单张公告卡片 ---------- */
.aero-ann {
    --accent: var(--theme-color);
    --accent-bg: color-mix(in srgb, var(--accent) 14%, var(--bg-card));

    display: flex;
    align-items: flex-start;
    gap: 14px;
    position: relative;
    padding: 16px 44px 16px 18px;
    margin: 0;
    border: 1px solid var(--border-primary);
    border-left: 4px solid var(--accent);
    border-radius: var(--border-radius);
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    color: var(--text-content);
    box-sizing: border-box;
    transition: opacity .25s ease, transform .25s ease;
}
.aero-ann-wrap--carousel .aero-ann { margin: 0; }

.aero-ann--success { --accent: var(--color-success); }
.aero-ann--warning { --accent: var(--color-warning); }
.aero-ann--danger  { --accent: var(--color-danger); }

/* 图标 */
.aero-ann__icon {
    flex: 0 0 auto;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--accent-bg);
    color: var(--accent);
    font-size: 18px;
    line-height: 1;
}
.aero-ann__icon::before { content: "\1F4E2"; }            /* 📢 信息默认 */
.aero-ann--success .aero-ann__icon::before { content: "\2705"; } /* ✓ */
.aero-ann--warning .aero-ann__icon::before { content: "\26A0"; } /* ⚠ */
.aero-ann--danger  .aero-ann__icon::before { content: "\26D4"; } /* ⛔ */
.aero-ann__icon--custom::before { content: ""; }

/* 正文区 */
.aero-ann__body {
    flex: 1 1 auto;
    min-width: 0;
}
.aero-ann__title {
    margin: 0 0 4px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}
.aero-ann__content {
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-content);
    word-break: break-word;
}
.aero-ann__content p { margin: 0 0 8px; }
.aero-ann__content p:last-child { margin-bottom: 0; }
.aero-ann__content a { color: var(--accent); text-decoration: underline; }

/* 行动按钮 */
.aero-ann__btn {
    display: inline-block;
    margin-top: 10px;
    padding: 7px 16px;
    border-radius: var(--border-radius-sm);
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: filter .2s ease, transform .1s ease;
}
.aero-ann__btn:hover { filter: brightness(1.08); }
.aero-ann__btn:active { transform: translateY(1px); }

/* 关闭按钮（位于外层 wrap 右上角） */
.aero-ann__close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    transition: background .2s ease, color .2s ease;
}
.aero-ann__close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ---------- 自动消失倒计时进度条 ---------- */
.aero-ann-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background: var(--border-secondary);
    overflow: hidden;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}
.aero-ann-progress span {
    display: block;
    height: 100%;
    width: 100%;
    background: var(--accent, var(--theme-color));
    transform-origin: left center;
}

/* ---------- 多条轮播 ---------- */
.aero-ann-carousel { position: relative; }
.aero-ann-track { position: relative; }
.aero-ann-slide { display: none; }
.aero-ann-slide.is-active { display: block; }
.aero-ann-slide.is-active .aero-ann { animation: aeroAnnFade .35s ease; }
@keyframes aeroAnnFade {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: none; }
}

/* 左右切换 */
.aero-ann-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    transition: opacity .2s ease, background .2s ease, color .2s ease;
}
.aero-ann-carousel:hover .aero-ann-nav { opacity: 1; }
.aero-ann-prev { left: 6px; }
.aero-ann-next { right: 6px; }
.aero-ann-nav:hover { background: var(--border-hover); color: var(--text-primary); }

/* 指示点 */
.aero-ann-dots {
    display: flex;
    gap: 6px;
    justify-content: center;
    padding: 8px 0 2px;
}
.aero-ann-dot {
    width: 8px;
    height: 8px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--border-hover);
    cursor: pointer;
    transition: background .2s ease, transform .2s ease;
}
.aero-ann-dot.is-active {
    background: var(--theme-color);
    transform: scale(1.25);
}

/* ---------- 响应式：窄屏收窄 ---------- */
@media (max-width: 480px) {
    .aero-ann {
        gap: 10px;
        padding: 14px 38px 14px 14px;
    }
    .aero-ann__icon {
        width: 30px;
        height: 30px;
        font-size: 15px;
    }
    .aero-ann__title { font-size: 14px; }
    .aero-ann__content { font-size: 13px; }
}

/* 尊重「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
    .aero-ann,
    .aero-ann__btn,
    .aero-ann__close,
    .aero-ann-slide.is-active .aero-ann { transition: none; animation: none; }
}