/* =====================================================================
   Solavis · 明晟云服内容中心 —— 站点样式表
   ---------------------------------------------------------------------
   设计 token 直接对齐商城主站 `web/src/assets/design-system.css` 的 v3 阶
   （品牌蓝 #0072BC / 墨色 #1D1D1F / 中性灰阶 / 纯白底），
   保证从 melfor.cn 跳过来不会有「换了一家公司」的割裂感。

   基线：纯白底 + 满宽色块分区 + 静止内容不加投影（只给浮层留阴影）。
   无 JS 依赖：栏目筛选走独立静态路径（/knowledge/brand/ 这类），
   TOC 折叠用 <details>，移动端导航靠换行而不是汉堡菜单。
   ===================================================================== */

/* ---------------------------------------------------------------
   1. Token
   --------------------------------------------------------------- */
:root {
  /* 品牌色阶 */
  --brand-50:  #EDF6FC;
  --brand-100: #D6EAF7;
  --brand-200: #ADD5EE;
  --brand-300: #7CBBE3;
  --brand-400: #3D93CE;
  --brand-600: #0072BC;
  --brand-700: #005C97;
  --brand-800: #004C7D;
  --accent:    #29ABE2;

  /* 中性色阶 */
  --ink-900: #1D1D1F;
  --ink-800: #26262A;
  --ink-700: #3A3A3C;
  --ink-600: #55575C;
  --ink-500: #86868B;
  --ink-400: #A1A1A6;
  --ink-300: #D2D2D7;
  --ink-200: #E8E8ED;
  --ink-100: #F5F5F7;
  --ink-50:  #FAFAFC;

  --text-primary:   var(--ink-900);
  --text-secondary: var(--ink-600);
  --text-tertiary:  var(--ink-500);
  --border:         rgba(0, 0, 0, .10);
  --hairline:       rgba(0, 0, 0, .07);

  /* 阴影只给浮层 */
  --shadow-2: 0 2px 8px rgba(0,0,0,.05), 0 8px 24px -8px rgba(0,0,0,.07);
  --shadow-3: 0 4px 14px rgba(0,0,0,.07), 0 20px 44px -12px rgba(0,0,0,.13);

  /* 字号：流式，减少断点 */
  --fs-display: clamp(32px, 4.6vw, 56px);
  --fs-h2:      clamp(24px, 3vw, 38px);
  --fs-h3:      clamp(19px, 1.8vw, 24px);
  --fs-lede:    clamp(16px, 1.35vw, 19px);

  --maxw: 1180px;
  --measure: 46em;   /* 正文最大行长（≈ 中文 40 字/行，最舒服的阅读宽度） */
  --radius: 14px;
  --radius-sm: 10px;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
               "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
               "Liberation Mono", monospace;
}

/* ---------------------------------------------------------------
   2. Reset / 基础
   --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* 锚点跳转时给固定头部留出空间，否则标题会被头部盖住 */
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: #fff;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

img { max-width: 100%; height: auto; border-style: none; }

a { color: var(--brand-600); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  line-height: 1.25;
  letter-spacing: -.012em;
  /* 长中文标题按字断行时，末行经常只剩一个字（「…资产的转 / 化」）。
     balance 让浏览器把行长均分，消掉这种孤字；不支持的浏览器直接忽略本行。 */
  text-wrap: balance;
}

/* 导语与列表摘要允许 last-line 优化（避免末行只有一个词），
   正文段落不开：中文正文逐字断行不会有孤行问题，开了反而增加排版开销。 */
.lede, .post-sum, .card p, .abstract-text { text-wrap: pretty; }

::selection { background: var(--brand-100); }

:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 跳转到主内容：键盘可达性，平时视觉隐藏 */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--brand-600); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 860px; }

.eyebrow {
  font-size: 12.5px; font-weight: 650; letter-spacing: .14em;
  text-transform: uppercase; color: var(--brand-600);
}

.lede { font-size: var(--fs-lede); line-height: 1.7; color: var(--text-secondary); }

.muted { color: var(--text-tertiary); }

/* ---------------------------------------------------------------
   3. 头部
   --------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.86);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 24px;
  min-height: 62px; padding-top: 8px; padding-bottom: 8px;
}

.brand { display: inline-flex; align-items: baseline; gap: 10px; flex: none; }
.brand:hover { text-decoration: none; }
.brand-mark {
  font-size: 17px; font-weight: 700; letter-spacing: .1em;
  color: var(--ink-900); text-transform: uppercase;
}
.brand-sub {
  font-size: 12px; color: var(--text-tertiary);
  letter-spacing: .02em; white-space: nowrap;
}

.site-nav { display: flex; align-items: center; gap: 22px; margin-left: auto; flex-wrap: wrap; }
.site-nav a {
  font-size: 14.5px; color: var(--ink-700); font-weight: 500;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--brand-600); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--brand-600); border-bottom-color: var(--brand-600); }
.site-nav .nav-out {
  border: 1px solid var(--border); border-radius: 980px;
  padding: 6px 14px; font-size: 13.5px; color: var(--ink-700);
}
.site-nav .nav-out:hover { border-color: var(--brand-300); color: var(--brand-700); }

/* 窄屏：品牌行 + 导航行，两行落地。
   不这么做的话 4 个导航项会被 flex 挤成三行（品牌被夹在中间），既难看又占高度。
   刻意不做汉堡菜单 —— 全站无 JS，折叠菜单必须引 JS，代价大于收益。 */
@media (max-width: 760px) {
  .site-header .wrap { flex-wrap: wrap; row-gap: 0; padding-top: 9px; padding-bottom: 9px; }
  .brand-sub { display: none; }
  .site-nav {
    flex: 1 1 100%; margin-left: 0; gap: 18px;
    justify-content: flex-start; padding-bottom: 2px;
  }
  .site-nav .nav-out { margin-left: auto; }
}

/* ---------------------------------------------------------------
   4. Hero / 区块
   --------------------------------------------------------------- */
.hero {
  padding: clamp(48px, 7vw, 96px) 0 clamp(36px, 5vw, 64px);
  background:
    radial-gradient(120% 100% at 82% -10%, rgba(41,171,226,.14) 0%, rgba(41,171,226,0) 58%),
    linear-gradient(180deg, var(--brand-50) 0%, #fff 100%);
  border-bottom: 1px solid var(--hairline);
}
.hero h1 {
  font-size: var(--fs-display); margin: 14px 0 18px; max-width: 20em;
  letter-spacing: -.026em;
}
.hero .lede { max-width: 40em; }

.section { padding: clamp(44px, 6vw, 80px) 0; }
.section + .section { border-top: 1px solid var(--hairline); }
.section-head { margin-bottom: 28px; }
.section-head h2 { font-size: var(--fs-h2); margin: 8px 0 8px; letter-spacing: -.02em; }
.section-head p { margin: 0; max-width: 44em; color: var(--text-secondary); }
.section-head .more { font-size: 14px; font-weight: 550; white-space: nowrap; }

.section-head-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
}

/* 统计条 */
.stats { display: flex; flex-wrap: wrap; gap: 14px 44px; margin-top: 30px; }
.stats div { display: flex; flex-direction: column; gap: 2px; }
.stats b {
  font-size: clamp(24px, 2.6vw, 34px); font-weight: 700;
  letter-spacing: -.02em; font-variant-numeric: tabular-nums; line-height: 1.1;
}
.stats span { font-size: 13px; color: var(--text-tertiary); }

/* ---------------------------------------------------------------
   5. 卡片 / 列表
   --------------------------------------------------------------- */
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); }

.card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 22px 22px 20px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; color: inherit;
  transition: border-color .18s ease, transform .18s ease;
}
a.card:hover {
  text-decoration: none; border-color: var(--brand-300);
  transform: translateY(-2px);
}
.card h3 { margin: 0; font-size: 17.5px; font-weight: 650; letter-spacing: -.01em; }
.card p { margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
.card .card-num {
  font-size: 13px; color: var(--brand-600); font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

/* 文章条目（列表页 / 首页） */
.post-list { display: flex; flex-direction: column; }
.post {
  display: flex; align-items: baseline; gap: 18px;
  padding: 18px 4px; border-top: 1px solid var(--hairline);
  color: inherit;
}
.post:first-child { border-top: none; }
.post:hover { text-decoration: none; }
.post:hover .post-title { color: var(--brand-600); }
.post-body { min-width: 0; flex: 1; }
.post-title { font-size: 16.5px; font-weight: 600; letter-spacing: -.008em; margin: 0 0 4px; }
.post-sum {
  margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.post-side {
  flex: none; font-size: 12.5px; color: var(--text-tertiary);
  font-variant-numeric: tabular-nums; text-align: right; min-width: 92px;
  display: flex; flex-direction: column; gap: 2px;
}

@media (max-width: 640px) {
  .post { flex-direction: column; gap: 6px; }
  .post-side { flex-direction: row; gap: 10px; text-align: left; min-width: 0; }
}

/* 栏目筛选 chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 26px; }
.chip {
  font-size: 13.5px; padding: 6px 14px; border-radius: 980px;
  border: 1px solid var(--border); color: var(--ink-700); background: #fff;
  font-variant-numeric: tabular-nums;
}
.chip:hover { border-color: var(--brand-300); text-decoration: none; color: var(--brand-700); }
.chip[aria-current="true"] { background: var(--brand-600); border-color: var(--brand-600); color: #fff; }
.chip[aria-current="true"]:hover { color: #fff; }

/* 标签 */
.tag {
  display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 6px;
  background: var(--brand-50); color: var(--brand-700); margin: 0 6px 6px 0;
}

/* ---------------------------------------------------------------
   6. 页面头（列表页 / 详情页）
   --------------------------------------------------------------- */
.page-head {
  padding: clamp(34px, 5vw, 60px) 0 clamp(24px, 3vw, 36px);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(180deg, var(--ink-50) 0%, #fff 100%);
}
.page-head h1 { font-size: var(--fs-h2); margin: 10px 0 12px; letter-spacing: -.022em; }
.page-head .lede { max-width: 44em; margin: 0; }

/* 面包屑 */
.crumbs { font-size: 13px; color: var(--text-tertiary); margin: 0 0 14px; }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.crumbs li { display: flex; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--ink-300); }
.crumbs a { color: var(--text-tertiary); }
.crumbs a:hover { color: var(--brand-600); }

/* 文章元信息 */
.post-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px;
  font-size: 13px; color: var(--text-tertiary); margin-top: 16px;
  font-variant-numeric: tabular-nums;
}
.post-meta .dot { color: var(--ink-300); }
.post-meta .pill {
  background: var(--brand-50); color: var(--brand-700);
  padding: 3px 11px; border-radius: 980px; font-weight: 550;
}

/* ---------------------------------------------------------------
   7. 正文
   --------------------------------------------------------------- */
.article-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 236px;
  gap: 56px; align-items: start;
  padding: clamp(32px, 5vw, 56px) 0 clamp(48px, 6vw, 80px);
}
@media (max-width: 1020px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}

.geo-article {
  font-size: 17px; line-height: 1.85; color: var(--ink-800);
  max-width: var(--measure);
}
.geo-article > :first-child { margin-top: 0; }
.geo-article p { margin: 0 0 1.15em; }
.geo-article strong { font-weight: 650; color: var(--ink-900); }
.geo-article em { font-style: normal; color: var(--brand-700); font-weight: 550; }

.geo-article h2 {
  font-size: clamp(21px, 2.1vw, 27px); font-weight: 700;
  margin: 2.1em 0 .7em; letter-spacing: -.018em; color: var(--ink-900);
}
.geo-article h3 {
  font-size: clamp(18px, 1.6vw, 21px); font-weight: 650;
  margin: 1.7em 0 .6em; letter-spacing: -.012em; color: var(--ink-900);
}
.geo-article h4 { font-size: 17px; font-weight: 650; margin: 1.5em 0 .5em; }

.geo-article ul, .geo-article ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.geo-article li { margin: .42em 0; }
.geo-article li > ul, .geo-article li > ol { margin: .42em 0; }

/* 摘要块 */
.article-abstract {
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius);
  padding: 22px 24px 6px;
  margin: 0 0 2.2em;
}
.article-abstract .abstract-label {
  margin: 0 0 .5em; font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--brand-700);
  display: flex; align-items: center; gap: 8px;
}
.article-abstract .abstract-label::before {
  content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--brand-600);
}
.article-abstract .abstract-text {
  margin: 0 0 1em; font-size: 15.5px; line-height: 1.8; color: var(--ink-700);
}

/* 分隔线 */
.geo-article hr.section-divider {
  border: none; height: 1px; background: var(--ink-200);
  margin: 2.4em 0;
}

/* 引用段 */
.geo-article blockquote.quotable-paragraph {
  margin: 0 0 1.4em; padding: 16px 22px;
  background: var(--ink-50); border-left: 3px solid var(--brand-400);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink-700); font-size: 16px;
}
.geo-article blockquote.quotable-paragraph p:last-child { margin-bottom: 0; }
.geo-article blockquote.quotable-paragraph p:first-child { margin-top: 0; }

/* 数据表：外层 .table-wrap 由构建脚本注入，负责横向滚动
   （表格最多 6 列，窄屏硬缩会把中文字挤成一列一字） */
.geo-article .table-wrap {
  margin: 0 0 1.6em; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.geo-article table.data-table {
  border-collapse: collapse; width: 100%; min-width: 520px;
  font-size: 14.5px; line-height: 1.6;
}
.geo-article table.data-table th,
.geo-article table.data-table td {
  padding: 11px 15px; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--hairline);
}
.geo-article table.data-table thead th {
  background: var(--ink-100); color: var(--ink-900);
  font-weight: 650; white-space: nowrap;
  border-bottom: 1px solid var(--ink-200);
}
.geo-article table.data-table tbody tr:last-child td { border-bottom: none; }
.geo-article table.data-table tbody tr:nth-child(even) { background: var(--ink-50); }

/* 代码块 / 结构图 */
.geo-article pre.code-block {
  margin: 0 0 1.6em; padding: 18px 20px;
  background: var(--ink-900); color: #E9E9EC;
  border-radius: var(--radius-sm); overflow-x: auto;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.75;
  -webkit-overflow-scrolling: touch;
}
.geo-article pre.code-block code { font: inherit; background: none; padding: 0; color: inherit; }
.geo-article code {
  font-family: var(--font-mono); font-size: .9em;
  background: var(--ink-100); padding: 1px 5px; border-radius: 5px; color: var(--brand-700);
}

/* FAQ */
.geo-article .article-faq { margin-top: 2.4em; }
.geo-article .faq-item {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 20px 14px; margin: 0 0 12px; background: #fff;
}
.geo-article .faq-question {
  margin: 0 0 .55em; font-size: 16.5px; font-weight: 650; color: var(--ink-900);
}
.geo-article .faq-item p:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------
   8. 侧栏 TOC / 相关
   --------------------------------------------------------------- */
.side { position: sticky; top: 86px; }
@media (max-width: 1020px) { .side { position: static; } }

.toc {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 4px 18px; background: var(--ink-50);
}
.toc > summary {
  cursor: pointer; list-style: none; padding: 14px 0;
  font-size: 13px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-600);
  display: flex; align-items: center; justify-content: space-between;
}
.toc > summary::-webkit-details-marker { display: none; }
.toc > summary::after { content: "＋"; color: var(--ink-400); font-size: 13px; }
.toc[open] > summary::after { content: "－"; }
.toc ol { list-style: none; margin: 0 0 14px; padding: 0; counter-reset: toc; }
.toc li { counter-increment: toc; margin: 0 0 9px; font-size: 14px; line-height: 1.5; }
.toc li::before {
  content: counter(toc); color: var(--ink-400); font-size: 12px;
  font-variant-numeric: tabular-nums; margin-right: 7px;
}
.toc a { color: var(--ink-700); }
.toc a:hover { color: var(--brand-600); }

.side-block { margin-top: 26px; }
.side-block h2 {
  font-size: 13px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-600); margin: 0 0 12px;
}
.side-list { display: flex; flex-direction: column; gap: 12px; }
.side-list a { font-size: 14px; line-height: 1.55; color: var(--ink-700); }
.side-list a:hover { color: var(--brand-600); }
.side-list time { display: block; font-size: 12px; color: var(--text-tertiary); margin-top: 3px; }

/* ---------------------------------------------------------------
   9. 页尾
   --------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--hairline);
  background: var(--ink-50);
  padding: clamp(40px, 5vw, 64px) 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid; grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 36px 30px;
}
@media (max-width: 860px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; } }

.footer-grid h2 {
  font-size: 13px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-600); margin: 0 0 14px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.footer-grid a { color: var(--ink-700); }
.footer-grid a:hover { color: var(--brand-600); }
.footer-about p { margin: 12px 0 0; color: var(--text-secondary); font-size: 13.5px; max-width: 30em; }

.footer-bar {
  margin-top: clamp(32px, 4vw, 48px); padding: 20px 0 26px;
  border-top: 1px solid var(--hairline);
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px;
  font-size: 12.5px; color: var(--text-tertiary);
}
.footer-bar a { color: var(--text-tertiary); }
.footer-bar a:hover { color: var(--brand-600); }
.footer-bar .sep { color: var(--ink-300); }
.footer-bar .beian-police { display: inline-flex; align-items: center; gap: 5px; }
.footer-bar .beian-icon { height: 16px; width: auto; flex: none; display: block; }
.footer-bar .spacer { flex: 1 1 0; min-width: 0; }

/* ---------------------------------------------------------------
   10. 通用小件
   --------------------------------------------------------------- */
.empty {
  padding: 56px 24px; text-align: center; color: var(--text-tertiary);
  border: 1px dashed var(--ink-300); border-radius: var(--radius);
}
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  border-radius: 980px; padding: 10px 22px; font-size: 14.5px; font-weight: 550;
  background: var(--brand-600); color: #fff; border: 1px solid var(--brand-600);
}
.btn:hover { background: var(--brand-700); border-color: var(--brand-700); text-decoration: none; }
.btn-ghost { background: #fff; color: var(--ink-700); border-color: var(--border); }
.btn-ghost:hover { background: #fff; border-color: var(--brand-300); color: var(--brand-700); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.notice {
  background: var(--brand-50); border: 1px solid var(--brand-100);
  border-radius: var(--radius); padding: 16px 20px;
  font-size: 14px; color: var(--brand-800); margin: 0 0 28px;
}
.notice p { margin: 0; }

.endnote {
  margin: 2.6em 0 0; padding-top: 20px; border-top: 1px solid var(--hairline);
  font-size: 13.5px; color: var(--text-tertiary);
}

@media print {
  .site-header, .side, .site-footer, .btn-row { display: none; }
  .article-layout { grid-template-columns: 1fr; }
  .geo-article { max-width: none; font-size: 12pt; }
}