/* =================================================================
   58淘资源 — 黑白极简 · 列表型资源站主题 (style.css)
   纯黑白灰 · 标题列表式内容流 · 移动优先 · 支持深色模式 · 无外部依赖
   所有页面（首页/列表页/资源页）共享此样式表
   ================================================================= */
/* ---------- 1. 设计变量（纯黑白，仅调灰阶） ---------- */
:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f6f6f6;
  --ink: #111111;
  --ink-2: #4b4b4b;
  --ink-3: #909090;
  --brand: #000000;
  --brand-strong: #000000;
  --brand-soft: #f1f1f1;
  --accent: #000000;
  --accent-soft: #f1f1f1;
  --line: #e9e9e9;
  --line-strong: #c9c9c9;
  --ok: #111111;
  --warn: #111111;
  --danger: #111111;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.13);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  --maxw: 900px;
  --header-h: 60px;
}
/* ---------- 2. 深色模式（灰阶反转） ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --surface: #111111;
    --surface-2: #1a1a1a;
    --ink: #f2f2f2;
    --ink-2: #b4b4b4;
    --ink-3: #787878;
    --brand: #ffffff;
    --brand-strong: #ffffff;
    --brand-soft: #1e1e1e;
    --accent: #ffffff;
    --accent-soft: #1e1e1e;
    --line: #262626;
    --line-strong: #3d3d3d;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.55);
    --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.65);
  }
}
/* ---------- 3. 基础与重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
a:hover {
  color: var(--brand-strong);
}
ul,
ol {
  margin: 0;
  padding-left: 1.3em;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.45em;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: break-word;
}
::selection {
  background: var(--ink);
  color: var(--bg);
}
:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
  border-radius: 4px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
/* ---------- 4. 通用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}
.section {
  padding-block: 26px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 4px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}
.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
}
.section-more {
  font-size: 0.82rem;
  color: var(--ink-2);
  white-space: nowrap;
}
.section-more::after {
  content: "→";
  margin-left: 4px;
  display: inline-block;
  transition: transform 0.15s ease;
}
.section-more:hover::after {
  transform: translateX(3px);
}
/* 标签 / 徽章（描边款，黑白） */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  white-space: nowrap;
}
/* 按钮（黑白实心 / 描边） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  background: var(--ink);
  color: var(--bg);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--brand-strong);
  color: var(--bg);
}
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}
/* ---------- 5. 页头（极简） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-h);
  position: relative;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  min-width: 0;
}
.brand:hover {
  color: var(--ink);
}
.brand-mark {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.82rem;
  font-weight: 800;
  border-radius: 8px;
  letter-spacing: 0.02em;
}
.brand-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
/* 主导航 */
.main-nav a {
  display: inline-block;
  padding: 7px 13px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}
.main-nav a:hover {
  color: var(--ink);
  background: var(--surface-2);
}
.main-nav a[aria-current],
.main-nav a.active {
  color: var(--bg);
  background: var(--ink);
  font-weight: 600;
}
/* 移动端汉堡按钮（纯 CSS 开关） */
.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid var(--line);
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.22s ease, opacity 0.22s ease;
}
/* ---------- 6. 首屏 Hero（超简洁） ---------- */
.hero {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.hero-inner {
  padding-block: 54px 46px;
  text-align: center;
}
.hero-kicker {
  margin: 0 0 12px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.hero-title {
  margin: 0 auto 10px;
  max-width: 14em;
  font-size: clamp(1.9rem, 4.6vw + 0.6rem, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.hero-sub {
  margin: 0 auto 24px;
  max-width: 34em;
  font-size: clamp(0.96rem, 1.1vw + 0.6rem, 1.1rem);
  color: var(--ink-2);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
/* ---------- 7. 资源审核信任卡（E-E-A-T，黑白化） ---------- */
.trust-badge {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: -26px;
  position: relative;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.trust-icon {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--bg);
  background: var(--ink);
  border-radius: 10px;
}
.trust-body {
  flex: 1 1 240px;
  min-width: 0;
}
.trust-kicker {
  margin: 0 0 2px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.trust-title {
  margin: 0 0 3px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}
.trust-desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-2);
}
.trust-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.trust-marks li {
  padding: 4px 12px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}
.trust-marks li::before {
  content: "✓";
  margin-right: 5px;
  font-weight: 800;
}
/* ---------- 8. 标题列表（核心内容流） ---------- */
.post-list {
  border-top: 1px solid var(--line);
}
.post-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s ease;
}
.post-item:hover {
  background: var(--surface-2);
}
.post-item .post-title {
  flex: 1 1 58%;
  min-width: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  overflow-wrap: break-word;
  transition: text-decoration-color 0.15s ease;
  text-decoration: underline transparent;
  text-underline-offset: 3px;
}
.post-item:hover .post-title {
  text-decoration-color: var(--ink);
}
.post-item .post-cat {
  flex: none;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 1px 9px;
  line-height: 1.6;
}
.post-item .post-cat:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.post-item .post-meta {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--ink-3);
  white-space: nowrap;
}
/* ---------- 9. 栏目列表（分类入口） ---------- */
.cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.cat-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition: all 0.15s ease;
}
.cat-item:hover {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.cat-item .cat-count {
  font-size: 0.74rem;
  font-weight: 400;
  color: var(--ink-3);
}
.cat-item:hover .cat-count {
  color: inherit;
}
/* ---------- 10. 列表页头部与面包屑 ---------- */
.page-head {
  padding-block: 28px 6px;
}
.page-title {
  font-size: clamp(1.45rem, 2.6vw + 0.6rem, 2rem);
  margin-bottom: 8px;
}
.page-desc {
  margin: 0;
  color: var(--ink-2);
  max-width: 42em;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-size: 0.84rem;
  color: var(--ink-3);
}
.breadcrumb a {
  color: var(--ink-2);
}
.breadcrumb a:hover {
  color: var(--ink);
  text-decoration: underline;
}
.breadcrumb .sep {
  color: var(--line-strong);
}
.breadcrumb .current {
  color: var(--ink);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 30ch;
}
/* 分页（极简） */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 30px 0 8px;
}
.pagination a,
.pagination span {
  display: inline-grid;
  place-items: center;
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: all 0.15s ease;
}
.pagination a:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.pagination .current {
  color: var(--bg);
  background: var(--ink);
  border-color: var(--ink);
}
.pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}
/* ---------- 11. 资源详情页 ---------- */
.layout-article {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-bottom: 40px;
}
.article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.article-head {
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.article-head h1 {
  margin: 12px 0 10px;
  font-size: clamp(1.45rem, 2.8vw + 0.6rem, 2rem);
  line-height: 1.35;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 0.84rem;
  color: var(--ink-3);
}
.article-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--line-strong);
}
.article-body {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--ink);
}
.article-body > * + * {
  margin-top: 1.05em;
}
.article-body h2,
.article-body h3,
.article-body h4 {
  margin-top: 1.5em;
  font-weight: 700;
}
.article-body h2 {
  font-size: 1.28rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.article-body h3 {
  font-size: 1.1rem;
}
.article-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body strong {
  color: var(--ink);
}
.article-body ul,
.article-body ol {
  padding-left: 1.5em;
}
.article-body li {
  margin-block: 0.35em;
}
.article-body blockquote {
  margin: 1.4em 0;
  padding: 14px 18px;
  border-left: 3px solid var(--ink);
  background: var(--surface-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-2);
}
.article-body blockquote p {
  margin: 0.3em 0;
}
.article-body blockquote p:first-child {
  margin-top: 0;
}
.article-body blockquote p:last-child {
  margin-bottom: 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: 0.9rem;
  border: 1px solid var(--line);
}
.article-body th,
.article-body td {
  padding: 10px 13px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.article-body thead th {
  background: var(--surface-2);
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.article-body tbody tr:nth-child(even) {
  background: var(--bg);
}
.article-body tbody tr:last-child td {
  border-bottom: 0;
}
.article-body code {
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 5px;
}
.article-body pre {
  padding: 15px 18px;
  overflow-x: auto;
  background: #111111;
  color: #ededed;
  border-radius: var(--radius);
  font-size: 0.87rem;
  line-height: 1.6;
}
.article-body pre code {
  padding: 0;
  background: none;
  border: 0;
  color: inherit;
}
.article-body img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-block: 0.4em;
}
.article-body hr {
  border: 0;
  border-top: 1px dashed var(--line-strong);
  margin: 2em 0;
}
/* 资源信息卡（可选，放在正文顶部） */
.resource-meta {
  margin: 1.4em 0;
  padding: 16px 18px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.9rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px 18px;
}
.resource-meta dt {
  font-weight: 700;
  color: var(--ink);
}
.resource-meta dd {
  margin: 0;
  color: var(--ink-2);
}
/* 常见疑问（FAQ） */
.article-body .faq-item {
  margin-top: 1.1em;
  padding: 14px 16px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.article-body .faq-item h3 {
  margin-top: 0;
  color: var(--ink);
}
/* 文章结尾 */
.article-end {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-strong);
  font-size: 0.84rem;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.article-end .tag {
  cursor: default;
}
/* 延伸阅读（标题列表） */
.related-list {
  border-top: 1px solid var(--line);
}
.related-list .post-item:last-child {
  border-bottom: 0;
}
/* 回到顶部 */
.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 90;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  color: var(--bg);
  background: var(--ink);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  opacity: 0.92;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.back-top:hover {
  color: var(--bg);
  opacity: 1;
  transform: translateY(-3px);
}
/* ---------- 12. 常见疑问区块（首页） ---------- */
.faq-list {
  display: grid;
  gap: 10px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease;
}
.faq-item[open] {
  border-color: var(--ink);
}
.faq-item summary {
  cursor: pointer;
  padding: 14px 42px 14px 16px;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--ink);
  list-style: none;
  position: relative;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface-2);
  border-radius: 6px;
  transition: transform 0.18s ease;
}
.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}
.faq-item .faq-answer {
  padding: 0 16px 14px;
  font-size: 0.9rem;
  color: var(--ink-2);
}
.faq-item .faq-answer p {
  margin: 0.5em 0;
}
.faq-item .faq-answer p:first-child {
  margin-top: 0;
}
/* 广告位 */
.ad-slot {
  margin: 8px 0;
  padding: 16px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--ink-3);
  background: var(--surface-2);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
}
/* ---------- 13. 页脚（极简） ---------- */
.site-footer {
  margin-top: 40px;
  background: #111111;
  color: #b7b7b7;
  font-size: 0.86rem;
}
@media (prefers-color-scheme: dark) {
  .site-footer {
    background: #060606;
    border-top: 1px solid var(--line);
  }
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding-block: 34px 22px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}
.footer-brand .brand-mark {
  width: 28px;
  height: 28px;
  background: #ffffff;
  color: #111111;
  font-size: 0.7rem;
}
.footer-col h4 {
  margin: 0 0 10px;
  font-size: 0.84rem;
  color: #ffffff;
  letter-spacing: 0.08em;
}
.footer-col p {
  margin: 0;
  line-height: 1.7;
}
.footer-links,
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-links a,
.footer-nav a {
  color: #b7b7b7;
  padding: 3px 0;
}
.footer-links a:hover,
.footer-nav a:hover {
  color: #ffffff;
}
.footer-bottom {
  padding-block: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  font-size: 0.78rem;
  color: #868686;
}
.footer-bottom p {
  margin: 0;
}
/* ---------- 14. 响应式断点 ---------- */
@media (min-width: 760px) {
  .article {
    padding: 34px 38px;
  }
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1.2fr;
    gap: 34px;
  }
  .hero-inner {
    padding-block: 72px 60px;
  }
}
/* 桌面端导航（≥900px 横向展示） */
@media (min-width: 900px) {
  .main-nav {
    display: flex;
    align-items: center;
    gap: 2px;
  }
}
/* 移动端导航（≤899px 显示汉堡） */
@media (max-width: 899px) {
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: -20px;
    right: -20px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
  }
  .main-nav a {
    display: block;
    padding: 11px 14px;
    font-size: 1rem;
    border-radius: 8px;
  }
  .nav-toggle-input:checked ~ .main-nav {
    display: flex;
  }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* ---------- 15. 下载弹窗（二维码） ---------- */
.tzy-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.55);
}
.tzy-modal.open {
  display: flex;
}
.tzy-modal-box {
  position: relative;
  width: 100%;
  max-width: 340px;
  padding: 28px 24px 24px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.tzy-modal-box h3 {
  margin: 0 0 14px;
  font-size: 1.08rem;
}
.tzy-qr-img {
  width: 200px;
  height: 200px;
  margin: 0 auto 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.tzy-modal-tip {
  margin: 0 0 16px;
  font-size: 0.86rem;
  color: var(--ink-2);
  line-height: 1.7;
}
.tzy-modal-link {
  width: 100%;
  justify-content: center;
}
.tzy-modal-code {
  margin: 10px 0 0;
  font-size: 0.84rem;
  color: var(--ink-3);
}
.tzy-modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tzy-modal-close:hover {
  color: var(--bg);
  background: var(--ink);
}

/* ---------- 16. 文章内提示块与下载按钮 ---------- */
.notice-block {
  margin: 1.4rem 0;
  padding: 14px 18px;
  border-left: 3px solid var(--ink);
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.notice-block strong {
  color: var(--ink);
}
.download-tip {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: var(--ink-3);
}
.article-body .btn {
  display: inline-flex;
}