/* ==========================================================================
   jonawu.com — 视觉风格基于 Simple.css（https://simplecss.org/，MIT）
   保留其设计语言：居中单栏、大标题、药丸导航、分区横线、斑马纹表格、自动暗色
   ========================================================================== */

:root {
  --sans-font: -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir,
    "Nimbus Sans L", Roboto, "Noto Sans", "Segoe UI", Arial, Helvetica,
    "Helvetica Neue", sans-serif;
  --serif-font: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --mono-font: Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
  --standard-border-radius: 5px;
  --border-width: 1px;

  /* 亮色主题 */
  --bg: #fff;
  --accent-bg: #f5f7ff;
  --text: #212121;
  --text-light: #585858;
  --border: #898ea4;
  --accent: #0d47a1;
  --accent-hover: #1266e2;
  --accent-text: var(--bg);
  --code: #d81b60;
  --preformatted: #444;
  --marked: #ffdd33;
  --disabled: #efefef;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #212121;
    --accent-bg: #2b2b2b;
    --text: #dcdcdc;
    --text-light: #ababab;
    --accent: #ffb300;
    --accent-hover: #ffe099;
    --accent-text: var(--bg);
    --code: #f06292;
    --preformatted: #ccc;
    --disabled: #111;
  }
  img, video { opacity: 0.8; }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-family: var(--sans-font);
  scroll-behavior: smooth;
}

/* ---- 居中单栏 ---- */
body {
  color: var(--text);
  background-color: var(--bg);
  font-size: 1.15rem;
  line-height: 1.5;
  display: grid;
  grid-template-columns: 1fr min(45rem, 90%) 1fr;
  margin: 0;
}
body > * { grid-column: 2; }

/* ---- 页头：通栏背景 ---- */
body > header,
.site-header {
  background-color: var(--accent-bg);
  border-bottom: var(--border-width) solid var(--border);
  text-align: center;
  padding: 0 0.5rem 2rem 0.5rem;
  grid-column: 1 / -1;
}
body > header > *:only-child,
.site-header > *:only-child { margin-block-start: 2rem; }

body > header h1,
.site-header h1 {
  max-width: 1200px;
  margin: 1rem auto;
}
body > header p,
.site-header p {
  max-width: 40rem;
  margin: 1rem auto;
}

main { padding-top: 1.5rem; }

/* ---- 页脚 ---- */
body > footer,
.site-footer {
  margin-top: 4rem;
  padding: 2rem 1rem 1.5rem 1rem;
  color: var(--text-light);
  font-size: 0.9rem;
  text-align: center;
  border-top: var(--border-width) solid var(--border);
  grid-column: 1 / -1;
}

/* ---- 标题 ---- */
h1 { font-size: 3rem; }
h2 { font-size: 2.6rem; margin-top: 3rem; }
h3 { font-size: 2rem;  margin-top: 3rem; }
h4 { font-size: 1.44rem; }
h5 { font-size: 1.15rem; }
h6 { font-size: 0.96rem; }

p { margin: 1.5rem 0; }

p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

h1, h2, h3 { line-height: 1.1; }

@media only screen and (max-width: 720px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2.1rem; }
  h3 { font-size: 1.75rem; }
  h4 { font-size: 1.25rem; }
}

/* ---- 链接 ---- */
a, a:visited { color: var(--accent); }
a:hover { text-decoration: none; }

/* ---- 按钮 ---- */
button,
.button,
.btn,
a.button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
  border: var(--border-width) solid var(--accent);
  background-color: var(--accent);
  color: var(--accent-text);
  padding: 0.5em;
  text-decoration: none;
  line-height: normal;
  font-size: inherit;
  font-family: inherit;
  border-radius: var(--standard-border-radius);
  display: inline-block;
  margin-bottom: 0.5rem;
  box-shadow: none;
  max-width: 100%;
}

button:enabled:hover,
.button:hover,
.btn:hover,
a.button:hover,
input[type="submit"]:enabled:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  cursor: pointer;
}

/* ---- 导航：药丸按钮 ---- */
header nav { font-size: 1rem; line-height: 2; padding: 1rem 0 0 0; }

header nav ul,
header nav ol {
  align-content: space-around;
  align-items: center;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  list-style-type: none;
  margin: 0;
  padding: 0;
}
header nav ul li,
header nav ol li { display: inline-block; }

header nav a,
header nav a:visited,
.site-nav a,
.site-nav a:visited {
  margin: 0 0.5rem 1rem 0.5rem;
  border: var(--border-width) solid var(--border);
  border-radius: var(--standard-border-radius);
  color: var(--text);
  display: inline-block;
  padding: 0.1rem 1rem;
  text-decoration: none;
}
header nav a:hover,
header nav a.current,
header nav a[aria-current="page"],
.site-nav a:hover,
.site-nav a.current {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
}

/* 兼容旧页面的导航容器 */
.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  padding: 1rem 0 0 0;
}

@media only screen and (max-width: 720px) {
  header nav a,
  .site-nav a {
    border: none;
    padding: 0;
    text-decoration: underline;
    line-height: 1;
    margin: 0 0.4rem 0.6rem 0.4rem;
  }
  header nav a.current,
  .site-nav a.current { background: none; }
}

/* ---- 分区：用横线切 ---- */
section {
  border-top: var(--border-width) solid var(--border);
  border-bottom: var(--border-width) solid var(--border);
  padding: 2rem 1rem;
  margin: 3rem 0;
}
section + section,
section:first-child {
  border-top: 0;
  padding-top: 0;
}
section + section { margin-top: 0; }
section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

/* ---- 卡片 ---- */
article, fieldset, dialog {
  border: var(--border-width) solid var(--border);
  padding: 1rem;
  border-radius: var(--standard-border-radius);
  margin-bottom: 1rem;
}
article h2:first-child,
section h2:first-child,
article h3:first-child,
section h3:first-child { margin-top: 1rem; }

/* ---- 表格：斑马纹 ---- */
table { border-collapse: collapse; margin: 1.5rem 0; }
td, th {
  border: var(--border-width) solid var(--border);
  text-align: start;
  padding: 0.5rem;
}
th { background-color: var(--accent-bg); font-weight: bold; }
tr:nth-child(even) { background-color: var(--accent-bg); }
table caption { font-weight: bold; margin-bottom: 0.5rem; }

/* ---- 引用 ---- */
blockquote {
  margin-inline-start: 2rem;
  margin-inline-end: 0;
  margin-block: 2rem;
  padding: 0.4rem 0.8rem;
  border-inline-start: 0.35rem solid var(--accent);
  color: var(--text-light);
  font-style: italic;
}
cite { font-size: 0.9rem; color: var(--text-light); font-style: normal; }

/* ---- 代码 ---- */
code, pre, pre span, kbd, samp {
  font-family: var(--mono-font);
  color: var(--code);
}
pre {
  padding: 1rem 1.4rem;
  max-width: 100%;
  overflow: auto;
  color: var(--preformatted);
  background-color: var(--accent-bg);
  border: var(--border-width) solid var(--border);
  border-radius: var(--standard-border-radius);
}
pre code { color: var(--preformatted); background: none; margin: 0; padding: 0; }

/* ---- 其他 ---- */
hr {
  border: none;
  height: var(--border-width);
  background: var(--border);
  margin: 1rem auto;
}
img, video { max-width: 100%; height: auto; border-radius: var(--standard-border-radius); }
mark { padding: 2px 5px; border-radius: var(--standard-border-radius); background-color: var(--marked); color: black; }
mark a { color: var(--accent); }
abbr[title] { cursor: help; text-decoration-line: underline; text-decoration-style: dotted; }
sup, sub { vertical-align: baseline; position: relative; }
sup { top: -0.4em; }
sub { top: 0.3em; }

/* ---- 提示框 ---- */
.notice,
.disclaimer-note {
  background: var(--accent-bg);
  border: var(--border-width) solid var(--border);
  border-radius: var(--standard-border-radius);
  padding: 1.5rem;
  margin: 2rem 0;
  font-size: 1rem;
}
.notice > p:first-of-type,
.disclaimer-note > p:first-of-type { margin-top: 0; }
.notice > p:last-of-type,
.disclaimer-note > p:last-of-type { margin-bottom: 0; }
.disclaimer-note { font-size: 0.92rem; color: var(--text-light); }

/* ==========================================================================
   固定顶部导航（用了 .has-topbar 的页面）
   左：姓名 + 资质 / 定位 / 标语；右：导航 / 邮箱
   ========================================================================== */
body.has-topbar { --topbar-h: 5.3rem; }

body.has-topbar > header.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "brand nav"
    "sub   email"
    "tag   email";
  align-items: center;
  column-gap: 1.5rem;
  row-gap: 0.1rem;
  height: var(--topbar-h);
  margin: 0;
  padding: 0.35rem 1.25rem;
  background: var(--bg);
  border-bottom: var(--border-width) solid var(--border);
  text-align: left;
}

body.has-topbar > header.topbar .brand {
  grid-area: brand;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.15;
  white-space: nowrap;
  color: var(--text);
  text-decoration: none;
}
body.has-topbar > header.topbar .brand:hover { color: var(--accent); }

body.has-topbar > header.topbar .subtitle {
  grid-area: sub;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.25;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.has-topbar > header.topbar .tagline {
  grid-area: tag;
  margin: 0;
  font-size: 1.06rem;
  font-weight: 600;
  line-height: 1.25;
  font-style: italic;
  letter-spacing: 0.015em;
  color: var(--accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.has-topbar > header.topbar nav {
  grid-area: nav;
  min-width: 0;
  padding: 0;
  line-height: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
body.has-topbar > header.topbar nav::-webkit-scrollbar { display: none; }
body.has-topbar > header.topbar nav ul {
  flex-wrap: nowrap;
  justify-content: flex-end;
  width: max-content;
  margin-left: auto;
  gap: 0.3rem;
}
body.has-topbar > header.topbar nav a,
body.has-topbar > header.topbar nav a:visited {
  margin: 0;
  padding: 0.22rem 0.5rem;
  font-size: 0.8rem;
  white-space: nowrap;
  border: var(--border-width) solid transparent;
  border-radius: var(--standard-border-radius);
  color: var(--text-light);
}
body.has-topbar > header.topbar nav a:hover,
body.has-topbar > header.topbar nav a.current {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

body.has-topbar > header.topbar .header-email,
body.has-topbar > header.topbar .header-email:visited {
  grid-area: email;
  align-self: center;
  justify-self: end;
  font-size: 0.78rem;
  color: var(--text-light);
  white-space: nowrap;
}
body.has-topbar > header.topbar .header-email:hover { color: var(--accent); }

body.has-topbar main { padding-top: calc(var(--topbar-h) + 1.5rem); }

/* 导航放不下时横向滚动，右缘渐隐提示还能滑 */
@media only screen and (max-width: 1199px) {
  body.has-topbar > header.topbar nav {
    padding-right: 1.5rem;
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 1.5rem), transparent);
    mask-image: linear-gradient(to right, #000 calc(100% - 1.5rem), transparent);
  }
}

@media only screen and (max-width: 720px) {
  body.has-topbar { --topbar-h: 6rem; }
  body.has-topbar > header.topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand email"
      "sub   sub"
      "tag   tag"
      "nav   nav";
    column-gap: 0.6rem;
    row-gap: 0.15rem;
    padding: 0.35rem 0.9rem;
  }
  body.has-topbar > header.topbar .brand { font-size: 1.02rem; }
  body.has-topbar > header.topbar .subtitle { font-size: 0.72rem; }
  body.has-topbar > header.topbar .tagline { font-size: 0.86rem; }
  body.has-topbar > header.topbar .header-email { font-size: 0.62rem; }
  body.has-topbar > header.topbar nav a,
  body.has-topbar > header.topbar nav a:visited {
    border: var(--border-width) solid var(--border);
    padding: 0.2rem 0.55rem;
    font-size: 0.8rem;
    text-decoration: none;
  }
}

@media only screen and (max-width: 380px) {
  body.has-topbar > header.topbar .brand { font-size: 0.95rem; }
  body.has-topbar > header.topbar .subtitle { font-size: 0.66rem; }
  body.has-topbar > header.topbar .tagline { font-size: 0.78rem; }
  body.has-topbar > header.topbar .header-email { font-size: 0.6rem; }
}

/* ==========================================================================
   常见问题
   ========================================================================== */
.faq h2 { margin-bottom: 0.5rem; }
.faq h3 {
  font-size: 1.25rem;
  line-height: 1.35;
  margin: 2rem 0 0.4rem;
}
.faq p { margin: 0 0 0.5rem; }

/* ==========================================================================
   首页模块
   ========================================================================== */
.hero { padding: 1rem 0 0; }
.hero h1 { font-size: 2.7rem; margin: 0 0 0.7rem; }
@media only screen and (max-width: 720px) {
  .hero h1 { font-size: 2.1rem; }
}

.sector-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0 0;
}
.sector-grid article {
  margin: 0;
  padding: 1.15rem 1.25rem;
}
.sector-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.12rem;
  line-height: 1.25;
}
.sector-grid h3 a {
  color: var(--text);
  text-decoration: none;
}
.sector-grid h3 a:hover { color: var(--accent); }
.sector-grid p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.5;
}
@media only screen and (max-width: 720px) {
  .sector-grid { grid-template-columns: 1fr; }
}

.more-link {
  margin: 1.75rem 0 0;
  font-size: 0.95rem;
}

.card-email {
  margin: 1.25rem 0 0;
  font-size: 1.05rem;
}

/* ==========================================================================
   以下为旧页面兼容层（about / contact / 文章页仍在用这些类）
   ========================================================================== */
.wrap { max-width: 45rem; margin: 0 auto; }

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.4rem;
  display: inline-block;
}
.brand span { font-weight: 400; color: var(--text-light); font-size: 1rem; }

.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
  margin: 2rem 0 0.5rem;
}
.lede { font-size: 1.15rem; }

.meta {
  font-size: 0.92rem;
  color: var(--text-light);
  margin: 0.5rem 0 1.5rem;
}

.profile {
  margin: 1.35rem 0 2rem;
  padding: 0.1rem 0 0.1rem 1.1rem;
  border-inline-start: 0.35rem solid var(--accent);
}
.profile-group { margin: 0 0 1.4rem; }
.profile-group:last-child { margin-bottom: 0; }
.profile-label {
  margin: 0 0 0.4rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
}
.profile ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.profile li {
  margin: 0.3rem 0;
  font-size: 1rem;
  color: var(--text);
}

.section-title {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
  border-bottom: var(--border-width) solid var(--border);
  padding-bottom: 0.6rem;
}

.posts { list-style: none; margin: 0; padding: 0; }
.posts li {
  border-bottom: var(--border-width) solid var(--border);
  padding: 1.5rem 0;
}
.posts li:last-child { border-bottom: 0; }
.posts h3 {
  font-size: 1.5rem;
  margin: 0 0 0.3rem;
  line-height: 1.2;
}
.posts h3 a { color: var(--text); text-decoration: none; }
.posts h3 a:hover { color: var(--accent); }
.posts .meta { margin: 0 0 0.5rem; }
.posts .desc { margin: 0; color: var(--text-light); font-size: 1rem; }

/* 文章列表：h2 作为卡标题，避免 h1 → h3 跳级 */
.post-list h2 {
  font-size: 1.5rem;
  margin: 0 0 0.3rem;
  line-height: 1.2;
}
.post-list h2 a { color: var(--text); text-decoration: none; }
.post-list h2 a:hover { color: var(--accent); }

.pillars { display: block; }
.pillar {
  border-inline-start: 0.35rem solid var(--accent);
  padding: 0.2rem 0 0.2rem 1rem;
  margin: 2rem 0;
}
.pillar h3 { font-size: 1.35rem; margin: 0 0 0.5rem; }
.pillar p { margin: 0; color: var(--text-light); font-size: 1rem; }

.author-box {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border-top: var(--border-width) solid var(--border);
  margin-top: 3rem;
  padding-top: 1.5rem;
}
.author-mark {
  flex: 0 0 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.author-box p { margin: 0; font-size: 0.92rem; color: var(--text-light); }
.author-box strong { display: block; color: var(--text); margin-bottom: 0.3rem; }

.footer-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 打印 */
@media print {
  body { display: block; }
  body > header { background: unset; }
  body > header nav,
  body > footer { display: none; }
  article { border: none; padding: 0; }
  a[href^="http"]::after { content: " <" attr(href) ">"; }
  a { text-decoration: none; }
}