/* ============================================================
   星河企业数字化管理平台 · 选型指南共享样式
   零外链、系统字体、移动端自适应
   ============================================================ */

:root {
  --brand: #2f5bff;
  --brand-dark: #2447c9;
  --brand-soft: #eef2ff;
  --ink: #10203b;
  --ink-2: #3d4d68;
  --ink-3: #64748b;
  --line: #dde4ef;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --bg-deep: #0e1c38;
  --radius: 10px;
  --maxw: 760px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  font-size: 17px;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--ink);
  font-weight: 700;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(1.6rem, 4.2vw, 2.2rem); letter-spacing: 0.01em; }
h2 {
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  margin-top: 1.9em;
  padding-top: 0.2em;
}
h3 { font-size: 1.1rem; margin-top: 1.5em; }

p { margin: 0 0 1.05em; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 跳过导航（WCAG 2.4.1）：平时移出视口，键盘聚焦时落到左上角。
   main 带 tabindex="-1" 只是为了让焦点真能搬过去，不进 Tab 序列。 */
.skip-link { position: absolute; top: 0; left: -9999px; z-index: 99; }
.skip-link:focus-visible {
  top: 8px; left: 8px;
  padding: 9px 16px;
  background: #fff;
  color: var(--brand-dark);
  border: 1px solid var(--brand);
  border-radius: 8px;
  font-weight: 700;
}
main:focus, main:focus-visible { outline: none; }

img { max-width: 100%; height: auto; }

ul, ol { padding-left: 1.4em; margin: 0 0 1.15em; }
li { margin-bottom: 0.35em; }

strong { font-weight: 700; color: var(--ink); }

hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2.2em 0;
}

/* ---------- 布局容器 ---------- */

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

/* ---------- 头部导航 ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-header .bar {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 60px;
  flex-wrap: wrap;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  line-height: 0;
  white-space: nowrap;
}
.logo:hover { text-decoration: none; }

.logo > img {
  display: block;
  width: 218px;
  height: auto;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--ink-2);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  white-space: nowrap;
}
.site-nav a:hover {
  background: var(--brand-soft);
  color: var(--brand-dark);
  text-decoration: none;
}
.site-nav a.nav-cta {
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 7px 16px;
  font-weight: 600;
}
.site-nav a.nav-cta:hover { background: var(--brand-dark); color: #fff; }

/* ---------- 面包屑 ---------- */

.breadcrumb {
  font-size: 0.86rem;
  color: var(--ink-3);
  padding: 16px 0 0;
}
.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before {
  content: "›";
  margin: 0 7px;
  color: var(--ink-3);
}

/* ---------- 文章主体 ---------- */

.article {
  padding: 8px 0 8px;
}

.article-head {
  margin: 18px 0 8px;
}

.post-meta {
  color: var(--ink-3);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-bottom: 4px;
}

.post-tag {
  background: var(--brand-soft);
  color: var(--brand-dark);
  border-radius: 999px;
  padding: 1px 10px;
  font-size: 0.8rem;
  white-space: nowrap;
}

.article-body {
  padding-bottom: 8px;
}

.article-body > p:first-of-type {
  font-size: 1.05rem;
  color: var(--ink-2);
}

.article-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 16px;
  margin: 18px 0 24px;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--ink-3);
  font-size: 0.86rem;
  line-height: 1.55;
}

.article-trust strong {
  width: 100%;
  color: var(--ink-2);
}

.content-basis {
  margin: 34px 0 0;
  padding: 20px 24px;
  border: 1px solid #cfd9ef;
  border-radius: var(--radius);
  background: #f7f9fe;
}

.content-basis h2 {
  margin: 0 0 0.65em;
  padding: 0;
  font-size: 1.08rem;
}

.content-basis p,
.content-basis ul {
  margin-bottom: 0.65em;
  color: var(--ink-2);
  font-size: 0.94rem;
}

.content-basis ul {
  margin-bottom: 0;
}

/* 表格：边框 + 斑马纹 */
.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.3em;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  border: 1px solid var(--line);
}

th, td {
  border: 1px solid var(--line);
  padding: 0.6em 0.85em;
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}

thead th {
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 700;
}

tbody tr:nth-child(even) { background: var(--bg-soft); }

.faq-q { margin-bottom: 0.35em; }
.faq-q strong { color: var(--ink); }

/* ---------- 相关阅读（文末互链） ---------- */

.related-posts {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 20px 24px 18px;
  margin: 34px 0 0;
}
.related-posts h2 {
  margin: 0 0 0.5em;
  padding: 0;
  font-size: 1.02rem;
  color: var(--ink-2);
  letter-spacing: 0.02em;
}
.related-posts ul {
  margin: 0;
  padding-left: 1.1em;
  list-style: disc;
}
.related-posts li {
  margin: 0 0 0.4em;
  font-size: 0.97rem;
  line-height: 1.65;
}
.related-posts li:last-child { margin-bottom: 0; }
.related-posts a { color: var(--ink); }
.related-posts a:hover { color: var(--brand); }

/* ---------- 文末 CTA ---------- */

.cta-block {
  background: linear-gradient(120deg, #17306b, var(--brand));
  border-radius: var(--radius);
  color: #fff;
  padding: 30px 32px;
  margin: 34px 0 8px;
  display: flex;
  align-items: center;
  gap: 20px 24px;
  flex-wrap: wrap;
}
.cta-block .cta-text { flex: 1; min-width: 220px; }
.cta-block h3 { color: #fff; margin: 0 0 4px; font-size: 1.2rem; }
.cta-block p { color: #d4deff; margin: 0; font-size: 0.96rem; }
.cta-block .btn {
  display: inline-block;
  background: #fff;
  color: var(--brand-dark);
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}
.cta-block .btn:hover { background: #eef2ff; text-decoration: none; }
.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.cta-block .btn-ghost {
  background: transparent;
  color: #fff;
  box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, 0.65);
}
.cta-block .btn-ghost:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }

.article-back {
  margin: 24px 0 8px;
  font-size: 0.95rem;
}

/* ---------- 列表页（index） ---------- */

.list-hero {
  padding: 40px 0 8px;
}
.list-hero .kicker {
  color: var(--brand);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.5em;
}
.list-hero p.lead {
  color: var(--ink-2);
  font-size: 1.05rem;
  max-width: 42em;
}

.authority-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 26px;
}

.authority-links a {
  display: grid;
  gap: 4px;
  min-height: 116px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: linear-gradient(145deg, #fff, var(--bg-soft));
}

.authority-links a:hover {
  border-color: var(--brand);
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(47, 91, 255, 0.1);
}

.authority-links strong {
  color: var(--brand-dark);
}

.authority-links span {
  color: var(--ink-3);
  font-size: 0.9rem;
}

.insights-index {
  max-width: 1080px;
}

.topic-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px;
  margin: 8px 0 34px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 30px rgba(16, 32, 59, 0.08);
  scrollbar-width: none;
}

.topic-nav::-webkit-scrollbar { display: none; }

.topic-nav a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--ink-2);
  background: var(--bg-soft);
  font-size: 0.9rem;
  font-weight: 600;
}

.topic-nav a:hover {
  color: #fff;
  background: var(--brand);
  text-decoration: none;
}

.topic-section {
  scroll-margin-top: 76px;
  padding: 4px 0 44px;
  border-bottom: 1px solid var(--line);
}

.topic-section:last-child { border-bottom: 0; }

.topic-head {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(320px, 1.15fr);
  align-items: end;
  gap: 8px 40px;
  margin-bottom: 16px;
}

.topic-head .kicker {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.topic-head h2 {
  margin: 0;
  padding: 0;
  font-size: clamp(1.45rem, 2.5vw, 2rem);
}

.topic-head p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.65;
}

.topic-section .post-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
}

.topic-section .post-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topic-section .post-card .read-more {
  margin-top: auto;
}

.download-asset {
  margin: 1.4em 0;
  padding: 20px 22px;
  border: 1px solid #b9cbff;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #f8faff, #eef3ff);
}

.download-asset p {
  margin: 0.35em 0 0.9em;
  color: var(--ink-2);
}

.download-asset .btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 999px;
  color: #fff;
  background: var(--brand);
  font-weight: 700;
}

.download-asset .btn:hover {
  background: var(--brand-dark);
  text-decoration: none;
}

.competitor-source-list {
  margin: 2em 0 1.4em;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.competitor-source-list h2 {
  margin: 0 0 0.55em;
  padding: 0;
  font-size: 1.08rem;
}

.competitor-source-list p,
.competitor-source-list ul {
  color: var(--ink-2);
  font-size: 0.92rem;
}

.competitor-source-list ul {
  margin-bottom: 0;
}

.post-list {
  display: grid;
  gap: 18px;
  padding: 8px 0 8px;
}

.post-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  background: var(--bg);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.post-card:hover {
  border-color: var(--brand);
  box-shadow: 0 8px 26px rgba(47, 91, 255, 0.12);
}

.post-card h2 {
  font-size: 1.24rem;
  margin: 0.35em 0 0.4em;
  padding: 0;
}
.post-card h2 a { color: var(--ink); }
.post-card h2 a:hover { color: var(--brand); }

.post-card .excerpt {
  color: var(--ink-2);
  font-size: 0.97rem;
  margin: 0 0 0.9em;
}

.read-more {
  font-weight: 600;
  font-size: 0.95rem;
}
.read-more::after { content: " →"; }

/* ---------- 页脚 ---------- */

.site-footer {
  background: #0a1428;
  color: #8fa3c8;
  padding: 34px 0 30px;
  font-size: 0.9rem;
  margin-top: 40px;
}
.site-footer .wrap { max-width: 1080px; }
.site-footer a { color: #b9c7e4; }
.site-footer a:hover { color: #fff; }
.footer-line { margin: 0 0 0.5em; }
.footer-nav { margin: 0 0 0.5em; }
.footer-nav a { margin: 0 2px; }
.footer-meta {
  color: #5f7196;
  font-size: 0.84rem;
  margin: 0;
}

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-nav { margin-left: 0; width: 100%; }
  .cta-block { padding: 24px; }
  .cta-block .btn { margin-top: 4px; }
  h2 { margin-top: 1.6em; }
  .authority-links { grid-template-columns: 1fr; }
  .topic-nav {
    margin-right: -20px;
    margin-left: -20px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }
  .topic-head {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .topic-head .kicker { grid-column: auto; }
  .topic-section .post-list { grid-template-columns: 1fr; }
  .topic-section { padding-bottom: 34px; }
  .article-trust,
  .content-basis { padding: 16px; }
}