/* ============================================================
   知知资源 · 科技风资源分享主题 (Z-BlogPHP)
   风格参考：子比 Zibll 资源站 + 现代科技感
   ============================================================ */

:root {
  --bg: #070b18;
  --bg-2: #0c1426;
  --panel: rgba(18, 28, 51, 0.55);
  --panel-solid: #0f1a30;
  --border: rgba(120, 160, 255, 0.16);
  --border-strong: rgba(120, 160, 255, 0.35);
  --text: #e7ecf5;
  --text-muted: #8a98b8;
  --text-dim: #5d6b8a;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --purple: #a855f7;
  --glow-cyan: rgba(34, 211, 238, 0.55);
  --glow-blue: rgba(59, 130, 246, 0.55);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1280px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(1000px 500px at 90% 0%, rgba(168, 85, 247, 0.16), transparent 55%),
    radial-gradient(900px 700px at 50% 120%, rgba(34, 211, 238, 0.10), transparent 60%),
    var(--bg);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(120,160,255,.2); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(120,160,255,.35); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===================== 顶部公告条 ===================== */
.notice-bar {
  background: linear-gradient(90deg, rgba(59,130,246,.18), rgba(168,85,247,.18));
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  font-size: 13px;
  color: var(--text-muted);
}
.notice-bar .container {
  display: flex;
  align-items: center;
  height: 38px;
  gap: 10px;
}
.notice-bar .tag {
  flex: none;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 1px;
}
.notice-bar .marquee {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
}
.notice-bar .marquee span {
  display: inline-block;
  padding-left: 100%;
  animation: scroll-left 22s linear infinite;
}
@keyframes scroll-left {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}

/* ===================== 导航 ===================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 24, 0.72);
  border-bottom: 1px solid var(--border);
}
.navbar .container {
  display: flex;
  align-items: center;
  height: 68px;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .5px;
}
.brand .logo {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--cyan), var(--blue) 45%, var(--purple));
  display: grid; place-items: center;
  font-weight: 900; color: #fff; font-size: 20px;
  box-shadow: 0 0 18px var(--glow-blue);
}
.brand .name {
  background: linear-gradient(90deg, #fff, var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav-menu {
  display: flex;
  gap: 6px;
  flex: 1;
}
.nav-menu a {
  padding: 9px 16px;
  border-radius: 10px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 15px;
  transition: .2s;
}
.nav-menu a:hover, .nav-menu a.active {
  color: #fff;
  background: rgba(59,130,246,.14);
  box-shadow: inset 0 0 0 1px var(--border-strong);
}
.nav-right {
  display: flex; align-items: center; gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 14px;
  gap: 8px;
  transition: .2s;
}
.search-box:focus-within { border-color: var(--border-strong); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.search-box input {
  background: transparent; border: none; outline: none;
  color: var(--text); width: 200px; font-size: 14px;
}
.search-box input::placeholder { color: var(--text-dim); }
.btn {
  border: none; cursor: pointer; font-weight: 700; font-size: 14px;
  padding: 9px 18px; border-radius: 11px; transition: .2s; font-family: var(--font);
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #04121f;
  box-shadow: 0 6px 18px rgba(34,211,238,.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(34,211,238,.45); }
.btn-ghost {
  background: rgba(255,255,255,.06); color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--border-strong); }

/* ===================== Hero ===================== */
.hero {
  padding: 56px 0 30px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 50px);
  font-weight: 900;
  letter-spacing: 1px;
  line-height: 1.2;
  background: linear-gradient(120deg, #fff 10%, var(--cyan) 50%, var(--purple) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p {
  color: var(--text-muted);
  margin: 14px auto 26px;
  max-width: 640px;
  font-size: 16px;
}
.hero-search {
  max-width: 620px; margin: 0 auto;
  display: flex; gap: 10px;
}
.hero-search input {
  flex: 1; padding: 15px 20px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text); font-size: 16px; outline: none;
}
.hero-search input:focus { border-color: var(--border-strong); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }

/* ===================== 布局 ===================== */
.layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  padding-bottom: 60px;
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

/* 筛选标签 */
.filter-tabs {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin: 10px 0 22px;
}
.filter-tabs .tab {
  padding: 8px 18px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text-muted); font-weight: 600; font-size: 14px;
  cursor: pointer; transition: .2s;
}
.filter-tabs .tab:hover { color: #fff; border-color: var(--border-strong); }
.filter-tabs .tab.active {
  color: #04121f; background: linear-gradient(135deg, var(--cyan), var(--blue));
  border-color: transparent; box-shadow: 0 6px 16px rgba(34,211,238,.3);
}

/* ===================== 资源卡片网格 ===================== */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  backdrop-filter: blur(8px);
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, var(--cyan), transparent 40%, var(--purple));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: .25s;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0,0,0,.45), 0 0 30px rgba(59,130,246,.25);
  border-color: var(--border-strong);
}
.card:hover::before { opacity: 1; }

.card .thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: linear-gradient(135deg, #11203b, #1a2c4d);
}
.card .thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.card:hover .thumb img { transform: scale(1.06); }
.card .thumb .badge {
  position: absolute; top: 12px; left: 12px;
  font-size: 12px; font-weight: 700; padding: 4px 10px;
  border-radius: 8px; color: #fff;
  background: rgba(0,0,0,.45); backdrop-filter: blur(6px);
}
.card .thumb .badge.vip { background: linear-gradient(135deg,#f59e0b,#ef4444); }
.card .thumb .badge.free { background: linear-gradient(135deg,#10b981,#22d3ee); }

.card-body { padding: 16px; }
.card-title {
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  cursor: pointer;
}
.card-title:hover { text-decoration: underline; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tag-pill {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  background: rgba(59,130,246,.12);
  border: 1px solid rgba(59,130,246,.25);
  color: #9ec5ff;
}
/* 分类标签：与标签区分，用紫色调 */
.cat-pill {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  background: rgba(168,85,247,.14);
  border: 1px solid rgba(168,85,247,.32);
  color: #d8b4fe;
}
.meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--text-dim);
  border-top: 1px solid var(--border);
  padding-top: 11px;
}
.meta .left { display: flex; gap: 14px; }
.meta .item { display: flex; align-items: center; gap: 5px; }
.meta svg { width: 15px; height: 15px; }
.meta .views { color: var(--cyan); }

/* ===================== 侧边栏 ===================== */
.sidebar { display: flex; flex-direction: column; gap: 22px; }
.widget {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  backdrop-filter: blur(8px);
}
.widget h3 {
  font-size: 16px; margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border);
}
.widget h3::before {
  content: ""; width: 4px; height: 16px; border-radius: 4px;
  background: linear-gradient(var(--cyan), var(--blue));
}
.rank-list { display: flex; flex-direction: column; gap: 12px; }
.rank-item { display: flex; align-items: center; gap: 12px; }
.rank-num {
  width: 24px; height: 24px; flex: none;
  display: grid; place-items: center; border-radius: 8px;
  font-weight: 800; font-size: 13px;
  background: rgba(255,255,255,.06); color: var(--text-muted);
}
.rank-item:nth-child(1) .rank-num { background: linear-gradient(135deg,#f59e0b,#ef4444); color:#fff; }
.rank-item:nth-child(2) .rank-num { background: linear-gradient(135deg,#a855f7,#3b82f6); color:#fff; }
.rank-item:nth-child(3) .rank-num { background: linear-gradient(135deg,#22d3ee,#10b981); color:#04121f; }
.rank-info { min-width: 0; }
.rank-info .t {
  font-size: 14px; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.rank-info .t:hover { color: var(--cyan); }
.rank-info .s { font-size: 12px; color: var(--text-dim); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  font-size: 13px; padding: 5px 12px; border-radius: 999px;
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  color: var(--text-muted); transition: .2s;
}
.tag-cloud a:hover { color: #fff; border-color: var(--border-strong); background: rgba(59,130,246,.12); }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat {
  text-align: center; padding: 14px 8px; border-radius: 12px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
}
.stat .num { font-size: 22px; font-weight: 800; color: var(--cyan); }
.stat .lab { font-size: 12px; color: var(--text-dim); margin-top: 2px; }

/* ===================== 分页 ===================== */
.pagination {
  display: flex; justify-content: center; gap: 8px; margin-top: 30px;
}
.pagination a, .pagination span {
  min-width: 40px; height: 40px; padding: 0 12px;
  display: grid; place-items: center; border-radius: 10px;
  background: var(--panel); border: 1px solid var(--border);
  color: var(--text-muted); font-weight: 600; transition: .2s;
}
.pagination a:hover { color: #fff; border-color: var(--border-strong); }
.pagination .active { background: linear-gradient(135deg,var(--cyan),var(--blue)); color:#04121f; border-color: transparent; }

/* ===================== 页脚 ===================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0; margin-top: 20px;
  color: var(--text-dim); font-size: 14px;
  text-align: center;
}
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--cyan); }
.footer .links { display: flex; gap: 22px; justify-content: center; margin-bottom: 14px; flex-wrap: wrap; }

/* ===================== 文章详情页 ===================== */
.single-wrap { padding: 34px 20px 60px; }
.post-detail {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(8px);
}
.crumbs {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim); margin-bottom: 14px;
}
.crumbs a:hover { color: var(--cyan); }
.post-title {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 900; line-height: 1.3; margin-bottom: 16px;
}
.post-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
  font-size: 13px; color: var(--text-dim);
  padding-bottom: 16px; margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.post-meta .item { display: flex; align-items: center; gap: 5px; }
.post-meta svg { width: 15px; height: 15px; }
.post-meta .views { color: var(--cyan); }
.post-cover {
  border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 22px;
  aspect-ratio: 16/9; background: linear-gradient(135deg,#11203b,#1a2c4d);
}
.post-cover img { width: 100%; height: 100%; object-fit: cover; }

.download-box {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: linear-gradient(135deg, rgba(59,130,246,.14), rgba(168,85,247,.12));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 18px 20px; margin-bottom: 24px; flex-wrap: wrap;
}
.download-box .dl-info { display: flex; flex-direction: column; gap: 4px; }
.download-box .dl-info strong { font-size: 17px; color: #fff; }
.download-box .dl-info span { font-size: 13px; color: var(--text-muted); }
.btn-dl {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #04121f; padding: 12px 28px; font-size: 15px;
  box-shadow: 0 6px 18px rgba(34,211,238,.35);
}
.btn-dl:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(34,211,238,.5); }

.post-content {
  font-size: 16px; line-height: 1.9; color: var(--text);
  word-break: break-word;
}
.post-content img { max-width: 100%; border-radius: 10px; margin: 14px 0; }
.post-content a { color: var(--cyan); text-decoration: underline; }
.post-content h2, .post-content h3 { margin: 22px 0 12px; }
.post-content pre {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px; overflow: auto; font-size: 14px;
}
.post-content blockquote {
  border-left: 3px solid var(--blue); padding-left: 14px;
  color: var(--text-muted); margin: 14px 0;
}
.post-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 8px; }
.post-author {
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border);
  font-size: 14px; color: var(--text-muted);
}
.related { margin-top: 40px; }
.related-title {
  font-size: 20px; margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.related-title::before {
  content: ""; width: 4px; height: 18px; border-radius: 4px;
  background: linear-gradient(var(--cyan), var(--blue));
}
@media (max-width: 640px) {
  .post-detail { padding: 18px; }
  .download-box { flex-direction: column; align-items: stretch; }
  .btn-dl { text-align: center; }
}