/* =========================================================
   zkun · 首页专属样式
   Industrial Telemetry — grid, monospace, signal-led
   共享样式见 styles/system.css
   ========================================================= */

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 88px 28px 72px;
  max-width: var(--container);
  margin: 0 auto;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px);
  background-size: 25% 100%;
  background-position: 25% 0, 50% 0, 75% 0;
  opacity: 0.5;
}
.hero-meta-top {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  position: relative;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.hero-tag::before {
  content: "▸";
  color: var(--accent);
  font-size: 0.8em;
}
.hero-title {
  position: relative;
  margin: 0 0 32px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(2.6rem, 7.2vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}
.hero-title .line {
  display: block;
}
.hero-title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
.hero-title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.06em;
  background: var(--accent);
  opacity: 0.4;
}
.hero-sub {
  position: relative;
  margin: 0 0 48px;
  max-width: 60ch;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-3);
  letter-spacing: 0.005em;
}
.hero-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.hero-stat {
  position: relative;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-stat + .hero-stat {
  border-left: 1px solid var(--border);
}
.hero-stat-label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
}
.hero-stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

/* ---------- 区块通用 ---------- */
#posts {
  padding: 80px 28px 0;
  max-width: var(--container);
  margin: 0 auto;
}

/* ---------- 文章工具条 ---------- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
}
.toolbar::before {
  content: "FILTER";
  position: absolute;
  top: -8px;
  left: 16px;
  padding: 0 8px;
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}
.tag-chip {
  padding: 5px 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.tag-chip:hover {
  color: var(--text);
  background: var(--bg-soft);
}
.tag-chip.active {
  color: var(--accent);
  background: var(--accent-tint);
  border-color: var(--accent);
}
.tag-chip.active::before {
  content: "■ ";
  color: var(--accent);
  margin-right: 2px;
}

/* ---------- 精选文章（Telemetry 头版） ---------- */
.featured {
  position: relative;
  display: block;
  margin: 0 0 48px;
  padding: 28px 28px 28px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s;
}
.featured::before,
.featured::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--accent);
  border-style: solid;
  border-width: 0;
  opacity: 0.7;
}
.featured::before {
  top: -1px;
  left: -1px;
  border-top-width: 2px;
  border-left-width: 2px;
}
.featured::after {
  bottom: -1px;
  right: -1px;
  border-bottom-width: 2px;
  border-right-width: 2px;
}
.featured:hover {
  border-color: var(--accent);
  background: var(--accent-tint);
}
.featured-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 3px 10px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}
.featured-flag::before {
  content: "★";
  margin-right: 2px;
}
.featured h3 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}
.featured h3 em {
  font-style: normal;
  color: var(--accent);
}
.featured-excerpt {
  margin: 0 0 20px;
  max-width: 70ch;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-2);
}
.featured-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
}
.featured-meta time {
  font-variant-numeric: tabular-nums;
}
.featured-meta .read-more {
  margin-left: auto;
  color: var(--accent);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.featured-meta .read-more::after {
  content: "→";
  transition: transform 0.2s;
}
.featured:hover .read-more::after {
  transform: translateX(4px);
}

/* ---------- 文章列表（数据表风格） ---------- */
.post-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}
.post-card {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr 120px 80px;
  gap: 24px;
  align-items: center;
  padding: 22px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: padding 0.18s ease, background 0.18s;
}
.post-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--accent);
  transition: width 0.18s ease;
}
.post-card:hover {
  padding-left: 28px;
  background: var(--accent-tint);
}
.post-card:hover::before {
  width: 3px;
}
.post-card:hover .post-title {
  color: var(--accent);
}
.post-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}
.post-body {
  min-width: 0;
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}
.post-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  padding: 1px 6px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.post-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  transition: color 0.18s;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-excerpt {
  display: none;
}
@media (min-width: 760px) {
  .post-excerpt {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.85rem;
    color: var(--text-3);
    margin-top: 6px;
    line-height: 1.5;
  }
}
.post-aside {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-3);
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.post-aside time {
  display: block;
  color: var(--text-2);
}
.post-aside .post-min {
  display: block;
  margin-top: 2px;
  color: var(--text-4);
  font-size: 0.68rem;
  font-weight: 500;
}
.post-tag-only {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: right;
  font-weight: 700;
}

/* ---------- 文章阅读器（书页式） ---------- */
.reader {
  position: fixed;
  inset: 0;
  z-index: 100;
  visibility: hidden;
  pointer-events: none;
}
.reader.open {
  visibility: visible;
  pointer-events: auto;
}
.reader-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 11, 13, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.3s;
}
.reader.open .reader-backdrop {
  opacity: 1;
}
.reader-panel {
  position: absolute;
  top: 4vh;
  bottom: 4vh;
  left: 50%;
  width: min(820px, calc(100vw - 32px));
  transform: translate(-50%, 16px);
  opacity: 0;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow-pop);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s;
}
.reader.open .reader-panel {
  transform: translate(-50%, 0);
  opacity: 1;
}
.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--bg-soft);
}
.reader-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.reader-close {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.reader-close:hover {
  color: #fff;
  background: var(--alert);
  border-color: var(--alert);
}
.reader-scroll {
  overflow-y: auto;
  padding: 40px 56px 72px;
  scrollbar-width: thin;
}
.reader-scroll::-webkit-scrollbar {
  width: 8px;
}
.reader-scroll::-webkit-scrollbar-thumb {
  background: var(--border-strong);
}
.reader-eyebrow {
  margin: 0 0 14px;
  padding: 3px 10px;
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}
.reader-title {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.reader-meta {
  margin: 0 0 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-3);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}
.reader-body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  max-width: 100%;
}
.reader-body h2 {
  margin: 1.8em 0 0.6em;
  padding-top: 0.6em;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.reader-body h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}
.reader-body p {
  margin: 1em 0;
  color: var(--text-2);
}
.reader-body strong {
  font-weight: 700;
  color: var(--text);
}
.reader-body em {
  font-style: italic;
  color: var(--text);
}
.reader-body ul {
  margin: 1.2em 0;
  padding-left: 0;
  list-style: none;
}
.reader-body ul li {
  position: relative;
  margin: 0.6em 0;
  padding-left: 1.6em;
  color: var(--text-2);
}
.reader-body ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.9em;
}
.reader-body blockquote {
  margin: 1.6em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-tint);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  font-weight: 500;
}
.reader-body code {
  padding: 1px 6px;
  font-size: 0.86em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-mono);
}
.reader-body pre {
  margin: 1.6em 0;
  padding: 20px 22px;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--code-text);
  font-family: var(--font-mono);
}
.reader-body pre code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
}

/* =========================================================
   响应式 · 首页断点
   ========================================================= */
@media (max-width: 960px) {
  .hero {
    padding: 64px 28px 48px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stat:nth-child(3),
  .hero-stat:nth-child(4) {
    border-top: 1px solid var(--border);
  }
  .hero-stat:nth-child(3) {
    border-left: none;
  }
  #posts {
    padding-top: 56px;
  }
  .reader-scroll {
    padding: 32px 36px 56px;
  }
}

@media (max-width: 720px) {
  .hero {
    padding: 48px 20px 32px;
  }
  #posts {
    padding: 48px 20px 0;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .post-card {
    grid-template-columns: 48px 1fr 70px;
    gap: 12px;
    padding: 18px 12px;
  }
  .post-card:hover {
    padding-left: 20px;
  }
  .post-aside {
    font-size: 0.7rem;
  }
  .post-aside .post-min {
    font-size: 0.64rem;
  }
  .reader-panel {
    top: 0;
    bottom: 0;
    width: 100vw;
    border: none;
  }
  .reader-scroll {
    padding: 24px 22px 44px;
  }
  .toolbar {
    padding: 14px 16px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: clamp(2rem, 10vw, 2.6rem);
  }
  .hero-sub {
    font-size: 0.85rem;
  }
  .post-card {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .post-num {
    font-size: 0.66rem;
  }
  .post-tag-only {
    text-align: left;
  }
  .post-aside {
    text-align: left;
  }
  .post-aside time,
  .post-aside .post-min {
    display: inline;
  }
  .post-aside .post-min::before {
    content: " · ";
  }
}