/* =============================================
   AI 快報 自訂動畫樣式
   依賴：Animate.css CDN
   ============================================= */

/* ── 通用進場：從下往上淡入 ── */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── 新聞卡片 stagger 延遲 ── */
.news-card:nth-child(1)  { transition-delay: 0.05s; }
.news-card:nth-child(2)  { transition-delay: 0.10s; }
.news-card:nth-child(3)  { transition-delay: 0.15s; }
.news-card:nth-child(4)  { transition-delay: 0.20s; }
.news-card:nth-child(5)  { transition-delay: 0.25s; }
.news-card:nth-child(6)  { transition-delay: 0.30s; }
.news-card:nth-child(7)  { transition-delay: 0.35s; }
.news-card:nth-child(8)  { transition-delay: 0.40s; }
.news-card:nth-child(9)  { transition-delay: 0.45s; }
.news-card:nth-child(10) { transition-delay: 0.50s; }
.news-card:nth-child(11) { transition-delay: 0.55s; }
.news-card:nth-child(12) { transition-delay: 0.60s; }

/* ── 好站卡片 stagger ── */
.site-card:nth-child(1)  { transition-delay: 0.05s; }
.site-card:nth-child(2)  { transition-delay: 0.10s; }
.site-card:nth-child(3)  { transition-delay: 0.15s; }
.site-card:nth-child(4)  { transition-delay: 0.20s; }
.site-card:nth-child(5)  { transition-delay: 0.25s; }
.site-card:nth-child(6)  { transition-delay: 0.30s; }
.site-card:nth-child(7)  { transition-delay: 0.35s; }
.site-card:nth-child(8)  { transition-delay: 0.40s; }
.site-card:nth-child(9)  { transition-delay: 0.45s; }
.site-card:nth-child(10) { transition-delay: 0.50s; }
.site-card:nth-child(11) { transition-delay: 0.55s; }
.site-card:nth-child(12) { transition-delay: 0.60s; }

/* ── 三格 widget stagger ── */
.widget-card:nth-child(1) { transition-delay: 0.05s; }
.widget-card:nth-child(2) { transition-delay: 0.15s; }
.widget-card:nth-child(3) { transition-delay: 0.25s; }

/* ── 日期分隔線從左滑入 ── */
.news-date-divider {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.news-date-divider.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ── 篩選換場 fade ── */
.sites-grid.switching {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.sites-grid.switching-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ── 文章標題淡入 ── */
.article-header {
    animation: articleFadeIn 0.6s ease both;
}

@keyframes articleFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── 文章圖片從模糊到清晰 ── */
.article-image {
    animation: imgFocus 0.8s ease both;
}

@keyframes imgFocus {
    from { opacity: 0; filter: blur(8px); transform: scale(1.02); }
    to   { opacity: 1; filter: blur(0);  transform: scale(1); }
}

/* ── 文章 h2 左側紅線畫出 ── */
.article-content h2 {
    position: relative;
    border-left: 4px solid transparent;
    animation: borderDraw 0.5s ease forwards;
    animation-play-state: paused;
}

.article-content h2.in-view {
    animation-play-state: running;
}

@keyframes borderDraw {
    from { border-left-color: transparent; padding-left: 0; }
    to   { border-left-color: var(--accent); padding-left: 14px; }
}

/* ── 數字跳動（點擊計數）── */
@keyframes countUp {
    from { transform: translateY(4px); opacity: 0; }
    to   { transform: translateY(0);   opacity: 1; }
}

.count-num {
    display: inline-block;
    animation: countUp 0.4s ease both;
}

/* ── 頁面進場（widget 區塊）── */
.widgets-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.widgets-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── prefer-reduced-motion 尊重使用者設定 ── */
@media (prefers-reduced-motion: reduce) {
    .fade-up, .news-date-divider, .widget-card,
    .widgets-section, .sites-grid {
        transition: none !important;
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}