/* ==========================================================================
   KEditor 官网 · 基础样式（设计令牌 / 重置 / 布局 / 通用组件）
   零依赖，纯静态。配色沿用编辑器默认主题色（微信绿 #07c160）。
   ========================================================================== */

:root {
  /* 品牌色 */
  --brand: #07c160;
  --brand-strong: #05a250;
  --brand-soft: #e8f9f0;
  --brand-line: #b8ecca;
  --brand-glow: rgba(7, 193, 96, 0.42);

  /* 墨色 / 中性色 */
  --ink: #0b1a12;
  --ink-2: #16261d;
  --text: #1f2d26;
  --muted: #5b6d63;
  --muted-2: #859389;
  --line: #e6ebe8;
  --line-2: #d6ded8;
  --surface: #ffffff;
  --surface-2: #f7faf8;
  --surface-3: #f1f6f3;

  /* 暗色区（Hero / Footer） */
  --dark: #071410;
  --dark-2: #0c2018;
  --dark-line: rgba(255, 255, 255, 0.1);
  --on-dark: #eaf5ef;
  --on-dark-muted: #91a89b;
  --on-dark-dim: #6b8276;

  /* 代码 */
  --code-bg: #0d1f18;
  --code-line: #1d3a2c;

  /* 排版 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
    Helvetica, Arial, "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* 尺寸 */
  --container: 1180px;
  --gutter: 24px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --header-h: 62px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(11, 26, 18, 0.06), 0 2px 8px rgba(11, 26, 18, 0.04);
  --shadow: 0 4px 12px rgba(11, 26, 18, 0.07), 0 12px 32px rgba(11, 26, 18, 0.06);
  --shadow-lg: 0 18px 48px rgba(11, 26, 18, 0.12);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------------------------------------------------------------- reset -- */

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

html {
  scroll-behavior: smooth;
  /* 注意：不要在这里设 scroll-padding-top。锚点目标都是正文标题，
     它们自己带 scroll-margin-top，两者会叠加 —— 实测跳转后标题
     会停在 160px 处，留出一大块空白。偏移量统一交给 scroll-margin-top。 */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--ink);
}

p { margin: 0; }

a {
  color: var(--brand-strong);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

a:hover { color: var(--brand); }

img, svg, video { max-width: 100%; display: block; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; }

code, pre, kbd, samp { font-family: var(--font-mono); }

ul, ol { margin: 0; padding: 0; }

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

::selection {
  background: var(--brand-glow);
  color: #fff;
}

/* ------------------------------------------------------------ 布局容器 -- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(56px, 8vw, 104px);
}

.section--tight { padding-block: clamp(40px, 6vw, 72px); }
.section--alt { background: var(--surface-2); }
.section--dark {
  background: var(--dark);
  color: var(--on-dark);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 { color: #fff; }

/* ------------------------------------------------------------ 区块标题 -- */

.section-head {
  max-width: 720px;
  margin-bottom: clamp(32px, 4vw, 52px);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--brand-strong);
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  border-radius: 999px;
}

.section--dark .eyebrow {
  color: #7ce8ac;
  background: rgba(7, 193, 96, 0.14);
  border-color: rgba(7, 193, 96, 0.32);
}

.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
}

.section-sub {
  margin-top: 14px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--muted);
}

.section--dark .section-sub { color: var(--on-dark-muted); }

/* ---------------------------------------------------------------- 按钮 -- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: 10px;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  box-shadow: 0 6px 18px rgba(7, 193, 96, 0.28);
}

.btn--primary:hover {
  color: #fff;
  box-shadow: 0 10px 26px rgba(7, 193, 96, 0.38);
}

.btn--ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--line-2);
  box-shadow: var(--shadow-sm);
}

.btn--ghost:hover {
  color: var(--ink);
  border-color: var(--brand-line);
  box-shadow: 0 8px 20px rgba(11, 26, 18, 0.1);
}

.btn--on-dark {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.22);
}

.btn--on-dark:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.36);
}

.btn--lg { padding: 15px 30px; font-size: 16px; }
.btn--sm { padding: 8px 15px; font-size: 13.5px; border-radius: 8px; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn-row--center { justify-content: center; }

/* -------------------------------------------------------- 代码 / 复制条 -- */

.code-block {
  position: relative;
  border-radius: var(--radius);
  background: var(--code-bg);
  border: 1px solid var(--code-line);
  overflow: hidden;
}

.code-block__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 14px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--on-dark-dim);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--code-line);
}

.code-block pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.75;
  color: #d6ecdf;
  -webkit-overflow-scrolling: touch;
}

.code-block code { white-space: pre; }

/* 语法着色（官网代码示例） */
.tok-com { color: #6b8f7d; font-style: italic; }
.tok-str { color: #9fd9a6; }
.tok-kw { color: #ff8ab5; }
.tok-fn { color: #7fd3f0; }
.tok-num { color: #f9c57a; }
.tok-tag { color: #ff8ab5; }
.tok-attr { color: #f9c57a; }
.tok-punc { color: #8ba99a; }
.tok-var { color: #e6f2ea; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--on-dark-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.copy-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.28);
}

.copy-btn.is-done {
  color: #7ce8ac;
  border-color: rgba(124, 232, 172, 0.5);
  background: rgba(7, 193, 96, 0.18);
}

/* 安装命令条 */
.install-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 420px;
  padding: 12px 12px 12px 18px;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: #d6ecdf;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.install-bar__prompt { color: var(--brand); user-select: none; }
.install-bar__cmd { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; }

/* ----------------------------------------------------------------- 行内 -- */

.inline-code {
  padding: 2px 6px;
  font-size: 0.88em;
  color: #0a5c33;
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  border-radius: 5px;
  overflow-wrap: anywhere;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* ---------------------------------------------------------------- 表格 -- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

table.data th,
table.data td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

table.data th {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface-2);
  white-space: nowrap;
}

table.data tr:last-child td { border-bottom: 0; }
table.data td code {
  font-size: 13px;
  color: #0a5c33;
  background: var(--brand-soft);
  padding: 1.5px 5px;
  border-radius: 4px;
}

/* ------------------------------------------------------------- 顶部导航 -- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  background: rgba(7, 20, 16, 0.82);
  border-bottom: 1px solid transparent;
  backdrop-filter: saturate(150%) blur(14px);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.site-header.is-stuck {
  background: rgba(7, 20, 16, 0.94);
  border-bottom-color: var(--dark-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand:hover { color: #fff; }
.brand__logo { width: 30px; height: 30px; flex: none; }
.brand__ver {
  padding: 1px 7px;
  font-size: 11.5px;
  font-weight: 600;
  color: #7ce8ac;
  background: rgba(7, 193, 96, 0.16);
  border: 1px solid rgba(7, 193, 96, 0.3);
  border-radius: 999px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 22px;
}

.nav__link {
  padding: 7px 12px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--on-dark-muted);
  border-radius: 8px;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav__link:hover { color: #fff; background: rgba(255, 255, 255, 0.07); }

.nav__link.is-active {
  color: #fff;
  font-weight: 600;
  background: rgba(7, 193, 96, 0.16);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  color: var(--on-dark-muted);
  border-radius: 8px;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.icon-link:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.icon-link svg { width: 19px; height: 19px; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--dark-line);
  border-radius: 9px;
}

.nav-toggle svg { width: 20px; height: 20px; }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 55;
  padding: 12px var(--gutter) 20px;
  background: var(--dark-2);
  border-bottom: 1px solid var(--dark-line);
  box-shadow: var(--shadow-lg);
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
}

.drawer.is-open { transform: none; opacity: 1; visibility: visible; }

.drawer__link {
  display: block;
  padding: 12px 4px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--on-dark);
  border-bottom: 1px solid var(--dark-line);
}

.drawer__link:last-of-type { border-bottom: 0; }
.drawer__link.is-active { color: #7ce8ac; }

/* ---------------------------------------------------------------- 页脚 -- */

.site-footer {
  padding-block: 56px 32px;
  color: var(--on-dark-muted);
  background: var(--dark);
  border-top: 1px solid var(--dark-line);
  font-size: 14px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px 24px;
}

.site-footer__brand p {
  margin-top: 14px;
  max-width: 30ch;
  line-height: 1.8;
}

.site-footer h4 {
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
}

.site-footer ul { list-style: none; display: grid; gap: 10px; }

.site-footer a { color: var(--on-dark-muted); }
.site-footer a:hover { color: #7ce8ac; }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 44px;
  padding-top: 22px;
  font-size: 13px;
  color: var(--on-dark-dim);
  border-top: 1px solid var(--dark-line);
}

/* ------------------------------------------------------------ 入场动画 -- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  will-change: opacity, transform;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}

/* -------------------------------------------------------------- 响应式 -- */

@media (max-width: 900px) {
  .nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header__actions .icon-link { display: none; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  :root { --gutter: 18px; }
  .brand__ver { display: none; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .install-bar { font-size: 13.5px; }
}