/* ============================================================
   爱洣库 imiku · 首页专属样式
   仅 index/index.html 使用
   ============================================================ */

/* ---------- 透视网格地板 ---------- */

.grid-floor {
  position: absolute;
  left: -25%;
  right: -25%;
  bottom: -6rem;
  height: 24rem;
  background-image:
    linear-gradient(rgba(102, 204, 255, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 204, 255, 0.22) 1px, transparent 1px);
  background-size: 44px 44px;
  transform: perspective(520px) rotateX(62deg);
  mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent 82%);
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent 82%);
  animation: grid-scroll 3.2s linear infinite;
  pointer-events: none;
}

@keyframes grid-scroll {
  from { background-position-y: 0; }
  to { background-position-y: 44px; }
}
/* ---------- 无限滚动词条带 ---------- */

.marquee-band {
  overflow: hidden;
  border-top: 1px solid rgba(102, 204, 255, 0.2);
  border-bottom: 1px solid rgba(102, 204, 255, 0.2);
  background: rgba(8, 14, 26, 0.85);
  padding: 1rem 0;
}

.marquee-track {
  display: flex;
  width: max-content;
  gap: 2.5rem;
  white-space: nowrap;
  animation: marquee-x 28s linear infinite;
}

@keyframes marquee-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.marquee-item {
  font-family: Consolas, monospace;
  font-size: 0.85rem;
  letter-spacing: 0.3em;
}

/* ============================================================
   文章卡片
   ============================================================ */

.article-card {
  height: 100%;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.article-cat {
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.article-cat.blue {
  background: rgba(102, 204, 255, 0.12);
  color: var(--miku-blue);
}

.article-cat.pink {
  background: rgba(255, 119, 170, 0.12);
  color: var(--miku-pink);
}

.article-date {
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.article-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.5;
  margin: 1rem 0 0.75rem;
  color: var(--text-main);
  transition: color 0.3s ease;
}

.article-card:hover .article-title {
  color: var(--miku-blue);
}

.article-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(180, 215, 240, 0.7);
  flex: 1;
}

.article-tags {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
/* ============================================================
   专题频道
   ============================================================ */

.topic-card {
  height: 100%;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  cursor: pointer;
}

.topic-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 0.9rem;
}

.topic-icon.blue {
  border: 1px solid rgba(102, 204, 255, 0.45);
  background: rgba(102, 204, 255, 0.08);
  color: var(--miku-blue);
  box-shadow: 0 0 18px rgba(102, 204, 255, 0.25);
}

.topic-icon.pink {
  border: 1px solid rgba(255, 119, 170, 0.45);
  background: rgba(255, 119, 170, 0.08);
  color: var(--miku-pink);
  box-shadow: 0 0 18px rgba(255, 119, 170, 0.25);
}

.topic-name {
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-main);
  margin: 0;
}

.topic-count {
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 0.5rem;
}

.topic-desc {
  font-size: 0.85rem;
  color: rgba(180, 215, 240, 0.65);
  margin: 0.25rem 0 0;
}
/* ============================================================
   关于 / 页脚
   ============================================================ */

.about-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3.5rem);
}

.about-39 {
  font-family: Consolas, monospace;
  font-size: 6rem;
  font-weight: 900;
  text-align: center;
}

.about-thanks {
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: rgba(150, 190, 220, 0.7);
  text-align: center;
  margin-top: 0.5rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 0.55rem;
  border: 1px solid rgba(102, 204, 255, 0.4);
  background: rgba(102, 204, 255, 0.07);
  color: var(--miku-blue);
  transition: all 0.3s ease;
}

.social-btn:hover {
  border-color: rgba(255, 119, 170, 0.6);
  color: var(--miku-pink);
  box-shadow: 0 0 18px rgba(255, 119, 170, 0.4);
}