/* 夸克常见问题 v2 —— 暗色科技风（第二版皮肤）
 * 与白色版共用同一份数据/JS，仅视觉不同。
 * 设计：deep-navy 背景 + 青绿(#38e1c6)/紫(#7c86ff)高亮 + 网格卡片 + 等宽点缀
 * 配图 .s-figure 保持浅色卡片，在暗底上作为亮面板，保证图例可读。
 */
:root {
  --d-bg: #0b0f1a;
  --d-bg2: #111726;
  --d-panel: #151c2e;
  --d-panel2: #1b2437;
  --d-line: #263149;
  --d-line2: #1e2740;
  --d-ink: #e7ecf6;
  --d-ink2: #aab4c8;
  --d-ink3: #7f8aa3;
  --d-cyan: #38e1c6;
  --d-violet: #7c86ff;
  --d-blue: #4b8bff;
  --d-danger: #ff6b6b;
  --d-warn: #ffb454;
  --d-ok: #46d39a;
  --d-radius: 14px;
  --d-mono: "JetBrains Mono", "Cascadia Code", Consolas, "SF Mono", monospace;
}

* { box-sizing: border-box; }
html { height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124,134,255,.14), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(56,225,198,.10), transparent 55%),
    var(--d-bg);
  color: var(--d-ink);
  font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
}

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

/* ── 顶栏 ── */
.s-topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 26, .78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--d-line);
}
.s-topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 28px;
  height: 66px; display: flex; align-items: center; gap: 30px;
}
.s-brand { height: 24px; width: auto; filter: brightness(0) invert(1) opacity(.9); }

.s-menu { display: flex; gap: 26px; font-size: 14px; color: var(--d-ink2); font-family: var(--d-mono); }
.s-menu a { padding: 4px 0; position: relative; transition: color .2s; white-space: nowrap; }
.s-menu a:hover { color: var(--d-cyan); }
.s-menu a.active { color: var(--d-cyan); }
.s-menu a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -3px;
  height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--d-cyan), var(--d-violet));
}
.s-cta {
  margin-left: auto; padding: 9px 18px; border-radius: 10px;
  background: linear-gradient(120deg, var(--d-cyan), var(--d-blue));
  color: #05202a; font-weight: 700; font-size: 14px;
  box-shadow: 0 6px 20px rgba(56, 225, 198, .25);
  transition: transform .15s, box-shadow .15s;
}
.s-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(56, 225, 198, .35); }

/* ── Hero ── */
.s-hero {
  max-width: 1180px; margin: 0 auto; padding: 64px 28px 30px; position: relative;
}
.s-hero h1 {
  font-size: 40px; margin: 0 0 14px; letter-spacing: -.5px; font-weight: 800;
  background: linear-gradient(100deg, #fff 20%, var(--d-cyan) 60%, var(--d-violet));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.s-hero .s-lead {
  max-width: 760px; color: var(--d-ink2); font-size: 15.5px; margin: 0 0 26px;
}

/* 搜索框 */
.s-search {
  max-width: 640px; display: flex; align-items: center; gap: 10px;
  background: var(--d-panel); border: 1px solid var(--d-line);
  border-radius: 14px; padding: 4px 6px 4px 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .35);
}
.s-search:focus-within { border-color: var(--d-cyan); box-shadow: 0 0 0 3px rgba(56, 225, 198, .15); }
.s-search .s-search-icon { color: var(--d-ink3); font-size: 16px; }
.s-search input {
  flex: 1; border: 0; outline: 0; background: transparent; color: var(--d-ink);
  font-size: 15px; padding: 12px 4px;
}
.s-search input::placeholder { color: var(--d-ink3); }
.s-search .s-search-clear {
  display: none; border: 0; background: var(--d-panel2); color: var(--d-ink2);
  width: 34px; height: 34px; border-radius: 9px; cursor: pointer; font-size: 18px;
}
.s-search .s-search-clear:hover { color: var(--d-cyan); }

/* ── 分类筛选 ── */
.s-tags {
  max-width: 1180px; margin: 0 auto; padding: 24px 28px 0;
  display: flex; flex-wrap: wrap; gap: 10px;
}
.s-tags button {
  border: 1px solid var(--d-line); background: var(--d-panel);
  color: var(--d-ink2); border-radius: 999px; padding: 8px 16px;
  font-size: 13.5px; cursor: pointer; transition: all .16s; font-family: var(--d-mono);
  display: inline-flex; align-items: center; gap: 8px;
}
.s-tags button:hover { border-color: var(--d-violet); color: var(--d-ink); }
.s-tags button.active {
  background: linear-gradient(120deg, rgba(56, 225, 198, .16), rgba(124, 134, 255, .16));
  border-color: var(--d-cyan); color: var(--d-cyan);
}
.s-tags .s-count {
  background: var(--d-panel2); color: var(--d-ink3); border-radius: 999px;
  padding: 1px 8px; font-size: 12px;
}
.s-tags button.active .s-count { color: var(--d-cyan); }

/* ── 列表主体 ── */
.s-main { max-width: 1180px; margin: 0 auto; padding: 28px 28px 40px; }
.s-section { margin-bottom: 34px; }
.s-section-head {
  display: flex; align-items: baseline; gap: 14px; margin-bottom: 18px;
  padding-bottom: 12px; border-bottom: 1px solid var(--d-line2);
}
.s-section-head h2 { font-size: 20px; margin: 0; color: var(--d-ink); font-weight: 700; }
.s-section-head .s-total { font-size: 13px; color: var(--d-ink3); font-family: var(--d-mono); }

/* 卡片网格 */
.s-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.s-card {
  background: linear-gradient(180deg, var(--d-panel), var(--d-bg2));
  border: 1px solid var(--d-line); border-radius: var(--d-radius);
  padding: 20px 20px 16px; position: relative; overflow: hidden;
  transition: transform .16s, border-color .16s, box-shadow .16s;
}
.s-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--d-cyan), var(--d-violet)); opacity: .5;
}
.s-card:hover {
  transform: translateY(-3px); border-color: var(--d-violet);
  box-shadow: 0 14px 40px rgba(0, 0, 0, .45);
}
.s-card h3 {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 16px; margin: 0 0 10px; line-height: 1.5; color: var(--d-ink); font-weight: 650;
}
.s-card .s-qmark {
  flex: none; width: 22px; height: 22px; border-radius: 7px;
  background: linear-gradient(120deg, var(--d-cyan), var(--d-blue));
  color: #05202a; font-weight: 800; font-size: 13px;
  display: inline-flex; align-items: center; justify-content: center; font-family: var(--d-mono);
}
.s-card .s-excerpt { color: var(--d-ink2); font-size: 14px; margin: 0 0 14px; }

/* 元信息 */
.s-meta { display: flex; flex-wrap: wrap; gap: 16px; color: var(--d-ink3); font-size: 12.5px; margin-bottom: 12px; font-family: var(--d-mono); }
.s-meta .s-meta-item { display: inline-flex; align-items: center; gap: 5px; }
.s-meta svg { width: 13px; height: 13px; opacity: .7; }
.s-meta .s-meta-num { color: var(--d-cyan); }

.s-card-foot { display: flex; align-items: center; justify-content: space-between; }
.s-badge {
  font-size: 12px; color: var(--d-violet); background: rgba(124, 134, 255, .12);
  border: 1px solid rgba(124, 134, 255, .3); border-radius: 999px; padding: 3px 11px; font-family: var(--d-mono);
}
.s-read { font-size: 13.5px; color: var(--d-cyan); display: inline-flex; align-items: center; gap: 4px; }
.s-read .s-arrow { transition: transform .16s; }
.s-read:hover .s-arrow { transform: translateX(3px); }

.s-empty { text-align: center; color: var(--d-ink2); padding: 80px 20px; }
.s-empty .s-empty-ic { display: block; font-size: 44px; margin-bottom: 12px; }

/* ── 分页器 ── */
.s-pager {
  max-width: 1180px; margin: 0 auto; padding: 4px 28px 70px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; justify-content: center;
}
.s-pager .s-page {
  min-width: 38px; height: 38px; padding: 0 12px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--d-line); border-radius: 10px; background: var(--d-panel);
  color: var(--d-ink2); font-size: 14px; cursor: pointer; transition: all .16s; font-family: var(--d-mono);
}
.s-pager button.s-page:hover { border-color: var(--d-cyan); color: var(--d-cyan); }
.s-pager .s-page.cur {
  background: linear-gradient(120deg, var(--d-cyan), var(--d-blue));
  border-color: transparent; color: #05202a; font-weight: 700;
}
.s-pager .s-page.disabled { opacity: .4; cursor: default; }
.s-pager .s-page.gap { border: 0; background: transparent; min-width: 20px; cursor: default; }
.s-pager .s-page.jump { border: 0; background: transparent; color: var(--d-ink3); font-size: 13px; font-family: inherit; }
.s-pager .s-page.jump input {
  width: 54px; height: 32px; margin: 0 4px; text-align: center;
  border: 1px solid var(--d-line); border-radius: 8px; font-size: 13px;
  background: var(--d-panel); color: var(--d-ink); font-family: var(--d-mono);
}

/* ── 文章页 ── */
.s-article { max-width: 820px; margin: 0 auto; padding: 30px 28px 70px; }
.s-crumb { font-size: 13px; color: var(--d-ink3); margin-bottom: 20px; font-family: var(--d-mono); }
.s-crumb a:hover { color: var(--d-cyan); }
.s-crumb .s-crumb-sep { margin: 0 8px; opacity: .5; }

.s-article-head { border-bottom: 1px solid var(--d-line); padding-bottom: 22px; margin-bottom: 8px; }
.s-article-head .s-kicker {
  display: inline-block; font-size: 12.5px; color: var(--d-cyan); font-family: var(--d-mono);
  background: rgba(56, 225, 198, .1); border: 1px solid rgba(56, 225, 198, .28);
  border-radius: 999px; padding: 3px 12px; margin-bottom: 14px;
}
.s-article-head h1 { font-size: 29px; line-height: 1.4; margin: 0 0 14px; color: #fff; font-weight: 800; letter-spacing: -.3px; }
.s-article-head .s-article-lead { color: var(--d-ink2); font-size: 16px; margin: 0 0 14px; }

/* 目录 */
.s-toc {
  background: var(--d-panel); border: 1px solid var(--d-line); border-left: 3px solid var(--d-cyan);
  border-radius: 12px; padding: 16px 20px; margin: 24px 0;
}
.s-toc h4 { margin: 0 0 10px; font-size: 13px; color: var(--d-ink3); font-family: var(--d-mono); text-transform: uppercase; letter-spacing: .5px; }
.s-toc ol { margin: 0; padding-left: 20px; }
.s-toc li { margin-bottom: 6px; }
.s-toc a { color: var(--d-ink2); font-size: 14px; }
.s-toc a:hover { color: var(--d-cyan); }

/* 正文 */
.s-article-body { padding-top: 10px; font-size: 15.5px; line-height: 1.9; color: var(--d-ink2); }
.s-article-body h2 {
  font-size: 20px; margin: 34px 0 14px; color: #fff; font-weight: 700; position: relative; padding-left: 16px;
}
.s-article-body h2::before {
  content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 3px;
  background: linear-gradient(180deg, var(--d-cyan), var(--d-violet));
}
.s-article-body h3 { font-size: 17px; margin: 24px 0 10px; color: var(--d-ink); }
.s-article-body p { margin: 0 0 15px; }
.s-article-body ul, .s-article-body ol { margin: 0 0 16px; padding-left: 22px; }
.s-article-body li { margin-bottom: 8px; }
.s-article-body strong { font-weight: 700; color: var(--d-cyan); }
.s-article-body a { color: var(--d-violet); text-decoration: underline; text-underline-offset: 2px; }
.s-article-body code {
  font-family: var(--d-mono); font-size: 13px; background: var(--d-panel2);
  color: var(--d-cyan); border: 1px solid var(--d-line); border-radius: 6px; padding: 2px 7px;
}

/* 表格 */
.s-table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--d-line); border-radius: 12px; }
.s-article-body table { width: 100%; border-collapse: collapse; font-size: 14px; }
.s-article-body th, .s-article-body td {
  padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--d-line2); color: var(--d-ink2);
}
.s-article-body th {
  background: var(--d-panel2); color: var(--d-ink); font-weight: 650; font-family: var(--d-mono); font-size: 13px;
}
.s-article-body tbody tr:last-child td { border-bottom: 0; }
.s-article-body tbody tr:hover td { background: rgba(124, 134, 255, .05); }

/* 配图：保持浅色卡片，暗底上作为亮面板 */
.s-article-body figure { margin: 22px 0; }
.s-article-body figure img { border-radius: 12px; border: 1px solid var(--d-line); }
.s-article-body figure.narrow img { max-width: 320px; margin: 0 auto; }
.s-article-body figure.shot img { box-shadow: 0 10px 30px rgba(0, 0, 0, .5); }
.s-article-body figure.qr img { max-width: 190px; margin: 0 auto; padding: 14px; background: #fff; }
.s-article-body figcaption { margin-top: 10px; text-align: center; font-size: 12.5px; color: var(--d-ink3); }
.s-figure-row { display: flex; flex-wrap: wrap; gap: 14px; margin: 20px 0; }
.s-figure-row figure { margin: 0; }

.s-figure {
  margin: 22px 0; padding: 16px; background: #f7fbff;
  border: 1px solid var(--d-line); border-radius: 14px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, .35);
}
.s-figure svg { display: block; }
.s-photo {
  margin: 22px 0; padding: 10px; background: #f7fbff;
  border: 1px solid var(--d-line); border-radius: 14px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, .35);
}
.s-photo img { display: block; width: 100%; height: auto; border-radius: 10px; object-fit: cover; aspect-ratio: 16 / 9; }
.s-photo figcaption { margin-top: 10px; text-align: center; font-size: 12.5px; color: #5a6474; }
.s-figure figcaption { margin-top: 10px; text-align: center; font-size: 12.5px; color: #5a6474; }

/* tip */
.s-tip {
  background: var(--d-panel); border: 1px solid var(--d-line); border-left: 3px solid var(--d-blue);
  border-radius: 12px; padding: 14px 18px; margin: 18px 0; color: var(--d-ink2);
}
.s-tip .s-tip-title { display: block; font-weight: 700; margin-bottom: 5px; color: var(--d-ink); }
.s-tip.warn { border-left-color: var(--d-warn); background: rgba(255, 180, 84, .07); }
.s-tip.danger { border-left-color: var(--d-danger); background: rgba(255, 107, 107, .07); }
.s-tip.ok { border-left-color: var(--d-ok); background: rgba(70, 211, 154, .07); }

/* 未核实标记 */
.s-flag {
  background: rgba(255, 180, 84, .08); border: 1px dashed var(--d-warn);
  border-radius: 10px; padding: 12px 16px; margin: 16px 0; font-size: 14px; color: var(--d-ink2);
}
.s-flag .s-flag-label {
  display: inline-block; background: var(--d-warn); color: #3a2600; font-weight: 700;
  font-size: 12px; border-radius: 6px; padding: 1px 8px; margin-right: 8px;
}

/* 资料来源 */
.s-ref { margin: 30px 0; padding: 18px 20px; background: var(--d-panel); border: 1px solid var(--d-line); border-radius: 12px; }
.s-ref h4 { margin: 0 0 12px; font-size: 14px; color: var(--d-ink); font-family: var(--d-mono); }
.s-ref ol { margin: 0; padding-left: 20px; }
.s-ref li { margin-bottom: 10px; font-size: 13.5px; color: var(--d-ink2); }
.s-ref a { color: var(--d-violet); word-break: break-all; }

/* 相关阅读 */
.s-more { margin: 36px 0; }
.s-more h3 { font-size: 18px; margin: 0 0 16px; color: var(--d-ink); }
.s-more-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.s-more-card {
  background: var(--d-panel); border: 1px solid var(--d-line); border-radius: 12px;
  padding: 16px; transition: all .16s; display: block;
}
.s-more-card:hover { border-color: var(--d-cyan); transform: translateY(-2px); }
.s-more-tag { font-size: 12px; color: var(--d-violet); font-family: var(--d-mono); }
.s-more-title { display: block; font-size: 14.5px; color: var(--d-ink); margin: 6px 0 10px; line-height: 1.5; }

/* 上下篇 */
.s-prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 30px 0; }
.s-prevnext a {
  background: var(--d-panel); border: 1px solid var(--d-line); border-radius: 12px; padding: 14px 18px;
  transition: all .16s;
}
.s-prevnext a:hover:not(.disabled) { border-color: var(--d-cyan); }
.s-prevnext .disabled { opacity: .4; }
.s-prevnext .s-prevnext-dir { display: block; font-size: 12px; color: var(--d-ink3); font-family: var(--d-mono); margin-bottom: 5px; }
.s-prevnext .s-prevnext-title { color: var(--d-ink); font-size: 14px; }
.s-prevnext .s-prevnext-next { text-align: right; }

.s-back {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 24px;
  background: linear-gradient(120deg, var(--d-cyan), var(--d-blue)); color: #05202a;
  font-weight: 700; padding: 11px 22px; border-radius: 10px;
}
.s-back:hover { transform: translateY(-1px); }

.s-state { text-align: center; padding: 90px 20px; color: var(--d-ink2); }
.s-state h2 { color: var(--d-ink); }

/* ── 页脚 ── */
.s-footer { border-top: 1px solid var(--d-line); margin-top: 40px; background: var(--d-bg2); }
.s-footer-inner { max-width: 1180px; margin: 0 auto; padding: 28px; color: var(--d-ink3); font-size: 12.5px; }
.s-footer .s-footer-row { margin-bottom: 8px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.s-footer .s-footer-line { opacity: .4; }
.s-footer a:hover { color: var(--d-cyan); }

/* ── 响应式 ── */
@media (max-width: 900px) {
  .s-topbar-inner { gap: 14px; padding: 0 16px; height: 58px; }
  .s-menu { display: none; }
  .s-hero { padding: 44px 18px 24px; }
  .s-hero h1 { font-size: 30px; }
  .s-tags { padding: 20px 16px 0; }
  .s-main { padding: 24px 16px 40px; }
  .s-grid { grid-template-columns: 1fr; }
  .s-more-grid { grid-template-columns: 1fr; }
  .s-prevnext { grid-template-columns: 1fr; }
  .s-prevnext .s-prevnext-next { text-align: left; }
  .s-article { padding: 22px 18px 50px; }
  .s-article-head h1 { font-size: 24px; }
  .s-pager .s-page.jump { display: none; }
}

@media print {
  .s-topbar, .s-footer, .s-prevnext, .s-more, .s-back, .s-tags, .s-pager { display: none; }
  body { background: #fff; color: #000; }
}