/* 益点点科技 · OpenClaw 学习中心（/openclaw/）
 * 由 gitee archive/nextjs-tutorials 分支的 Next.js 站点重建，视觉并入官网设计令牌。
 * 教程正文由 scripts/build-openclaw-tutorials.py 生成。
 */

/* ---------------------------------------------------------------- 通用 */

:root { --oc-display: 52px; --oc-reading-width: 1120px; --oc-code-muted: #a2a9b1; --site-violet: var(--site-blue); --site-mint: var(--site-blue); }
.oc-hero h1, .oc-page-head h1, .oc-chapter-head h1, .tutorial-nav-link .dir { letter-spacing: 0; }

.oc-eyebrow {
  margin: 0 0 14px; color: var(--site-muted);
  font-size: var(--site-micro); font-weight: 700; letter-spacing: .14em;
}
.oc-level {
  display: inline-flex; min-height: 26px; align-items: center; padding: 0 10px;
  border: 1px solid var(--site-primary-border); border-radius: var(--site-radius-control);
  color: var(--site-violet-deep); background: var(--site-tint-lavender);
  font-size: var(--site-micro); font-weight: 600;
}
.oc-level[data-level="入门"] { border-color: var(--site-primary-border); color: var(--site-mint); background: var(--site-tint-mint); }
.oc-level[data-level="进阶"] { border-color: var(--site-primary-border); color: var(--site-violet-deep); background: var(--site-tint-lavender); }
.oc-level[data-level="高级"] { border-color: rgba(117, 122, 129, .32); color: var(--site-ink); background: var(--site-tint-gray); }

/* ---------------------------------------------------------------- 首页 Hero */

.oc-hero { padding: clamp(52px, 7vw, 96px) 0 clamp(60px, 7vw, 92px); background: var(--site-bg); }
.oc-hero-grid { display: grid; grid-template-columns: minmax(0,1fr); gap: 44px; align-items: center; justify-items: center; text-align: center; }
.oc-hero-badge {
  display: inline-flex; min-height: 30px; align-items: center; padding: 0 13px; margin-bottom: 20px;
  border: 1px solid rgba(117, 122, 129, .3); border-radius: var(--site-radius);
  color: var(--site-nav-text); background: var(--site-chrome); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .95);
  font-size: var(--site-micro); font-weight: 550;
}
.oc-hero h1 {
  margin: 0 0 18px; color: var(--site-ink);
  font-size: var(--oc-display); line-height: 1.2; letter-spacing: 0; font-weight: 600;
}
.oc-hero h1 em { font-style: normal; color: var(--site-violet); }
.oc-hero-lead { max-width: 680px; margin: 0 auto 26px; color: var(--site-muted); font-size: var(--site-lead); line-height: var(--site-leading-prose); }
.oc-hero-lead strong { display: block; margin-top: 12px; color: var(--site-ink); font-weight: 600; }
.oc-hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

/* 终端示意卡片 */
.oc-terminal {
  border: 1px solid rgba(25, 30, 36, .5); border-radius: var(--site-radius); overflow: hidden;
  background: linear-gradient(180deg, #1c1f23, #101114); box-shadow: var(--site-shadow-float);
}
.oc-terminal-bar {
  display: flex; align-items: center; gap: 7px; padding: 11px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .09); background: rgba(255, 255, 255, .03);
}
.oc-hero .oc-terminal { width: min(100%,760px); text-align: left; border: 0; border-radius: var(--site-radius); box-shadow: none; }
.oc-terminal-dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, .22); }
.oc-terminal-title { margin-left: 6px; color: var(--oc-code-muted); font-size: var(--site-micro); letter-spacing: 0; }
.oc-terminal-body {
  margin: 0; padding: 18px 18px 22px; color: #d7dade;
  font-family: var(--site-font-mono);
  font-size: var(--site-micro); line-height: 1.95; white-space: pre-wrap; min-height: 224px;
}
.oc-terminal-body .ok { color: #a9b6c4; }
.oc-terminal-body .hi { color: #fff; font-weight: 600; }
.oc-terminal-body .dim { color: var(--oc-code-muted); }
.oc-caret { display: inline-block; width: 8px; height: 15px; margin-left: 1px; background: #fff; vertical-align: -2px; animation: oc-blink 1.06s step-end infinite; animation-play-state: paused; }
@keyframes oc-blink { 0%, 100% { opacity: 1 } 50% { opacity: 0 } }

/* ---------------------------------------------------------------- 工作原理 / 核心功能 */

.oc-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 34px; }
.oc-step { padding: 21px; border-radius: var(--site-radius); border: 1px solid var(--site-line); background: #fff; box-shadow: var(--site-shadow-soft); }
.oc-step-no { display: block; margin-bottom: 12px; color: var(--site-faint); font-size: var(--site-micro); font-weight: 700; letter-spacing: var(--site-tracking-label); font-variant-numeric: tabular-nums; }
.oc-step h3 { margin: 0 0 8px; font-size: var(--site-body); font-weight: 600; letter-spacing: var(--site-tracking-heading); line-height: var(--site-leading-heading); }
.oc-step p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }

.oc-features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 34px; }
.oc-feature { padding: 23px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: #fff; box-shadow: var(--site-shadow-soft); transition: border-color var(--site-medium) var(--site-ease), box-shadow var(--site-medium) var(--site-ease), transform var(--site-medium) var(--site-ease); }
.oc-feature:hover { border-color: rgba(117, 122, 129, .45); box-shadow: var(--site-shadow); transform: translateY(-2px); }
.oc-feature-icon { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 14px; border: 1px solid rgba(117, 122, 129, .3); border-radius: var(--site-radius-sm); background: var(--site-chrome); color: var(--site-nav-text); }
.oc-feature-icon svg { width: 19px; height: 19px; }
.oc-feature h3 { margin: 0 0 8px; font-size: var(--site-body); font-weight: 600; letter-spacing: var(--site-tracking-heading); line-height: var(--site-leading-heading); }
.oc-feature p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }

/* ---------------------------------------------------------------- FAQ */

.oc-faq { max-width: var(--site-measure); margin: 34px auto 0; }
.oc-faq details { border: 1px solid var(--site-line); border-radius: var(--site-radius-sm); background: #fff; box-shadow: var(--site-shadow-soft); }
.oc-faq details + details { margin-top: 10px; }
.oc-faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 17px 19px; cursor: pointer; font-size: var(--site-body); font-weight: 600;
  line-height: var(--site-leading-tight); list-style: none;
}
.oc-faq summary::-webkit-details-marker { display: none; }
.oc-faq summary::after {
  flex: none; width: 7px; height: 7px; margin-top: -4px;
  border-right: 1.5px solid var(--site-muted); border-bottom: 1.5px solid var(--site-muted);
  content: ""; transform: rotate(45deg); transition: transform var(--site-fast) var(--site-ease);
}
.oc-faq details[open] summary::after { margin-top: 4px; transform: rotate(-135deg); }
.oc-faq details[open] summary { border-bottom: 1px solid var(--site-line); }
.oc-faq .oc-faq-body { padding: 17px 19px 19px; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }

/* ---------------------------------------------------------------- CTA */

.oc-cta { text-align: center; padding: clamp(32px, 4vw, 48px) clamp(22px, 4vw, 44px); border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-chrome); box-shadow: var(--site-shadow-soft); }
.oc-cta h2 { margin: 0 0 12px; font-size: var(--site-h2); font-weight: 600; letter-spacing: var(--site-tracking-heading); line-height: var(--site-leading-heading); }
.oc-cta p { max-width: 520px; margin: 0 auto 24px; color: var(--site-muted); font-size: var(--site-body); line-height: var(--site-leading-prose); }
.oc-cta-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

/* ---------------------------------------------------------------- 教程目录 */

.oc-page-head { padding-bottom: clamp(28px, 4vw, 44px); }
.oc-tutorial-index { padding-bottom: clamp(56px, 7vw, 96px); }
.tutorial-group + .tutorial-group { margin-top: 46px; }
.tutorial-group-title { margin: 0 0 16px; font-size: var(--site-h3); font-weight: 600; letter-spacing: var(--site-tracking-heading); line-height: var(--site-leading-heading); }
.tutorial-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.tutorial-card a {
  display: grid; grid-template-columns: 46px minmax(0, 1fr) auto; align-items: center; gap: 16px;
  padding: 17px 21px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: #fff;
  box-shadow: var(--site-shadow-soft);
  transition: border-color var(--site-medium) var(--site-ease), box-shadow var(--site-medium) var(--site-ease), transform var(--site-medium) var(--site-ease);
}
.tutorial-card a:hover { border-color: var(--site-primary-border); box-shadow: var(--site-shadow); transform: translateY(-1px); }
.tutorial-card-no { color: var(--site-faint); font-size: var(--site-small); font-weight: 700; font-variant-numeric: tabular-nums; }
.tutorial-card-main { display: grid; gap: 5px; min-width: 0; }
.tutorial-card-main strong { color: var(--site-ink); font-size: var(--site-body); font-weight: 600; line-height: var(--site-leading-heading); }
.tutorial-card-lead { color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-body); }
.tutorial-card-time { color: var(--site-faint); font-size: var(--site-micro); white-space: nowrap; font-variant-numeric: tabular-nums; }

/* ---------------------------------------------------------------- 章节页 */

.oc-chapter-head { padding: clamp(36px, 5vw, 58px) 0 clamp(26px, 3vw, 36px); border-bottom: 1px solid var(--site-line); background: var(--site-ice); }
.oc-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; color: var(--site-muted); font-size: var(--site-micro); }
.oc-breadcrumb a { color: var(--site-muted); }
.oc-breadcrumb a:hover { color: var(--site-violet); }
.oc-breadcrumb span { color: var(--site-faint); }
.oc-chapter-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 16px; color: var(--site-muted); font-size: var(--site-micro); }
.oc-chapter-head h1 { margin: 0 0 14px; font-size: var(--site-h1); line-height: var(--site-leading-display); letter-spacing: var(--site-tracking-display); font-weight: 600; }
.oc-chapter-lead { max-width: var(--site-measure); margin: 0; color: var(--site-muted); font-size: var(--site-lead); line-height: var(--site-leading-prose); }

.oc-chapter-head .site-wrap, .oc-chapter-layout {
  width: min(var(--site-measure), calc(100% - var(--site-gutter) * 2));
}
.oc-chapter-layout { padding: clamp(36px, 5vw, 58px) 0 clamp(56px, 7vw, 88px); }

/* 教程正文排版：中文正文 42 字/行 */
.tutorial-body { max-width: var(--site-measure); color: var(--site-ink); font-size: var(--site-body); line-height: var(--site-leading-prose); }
.tutorial-body h2 {
  margin: 46px 0 16px; padding-top: 24px; border-top: 1px solid var(--site-line);
  font-size: var(--site-h3); font-weight: 600; letter-spacing: var(--site-tracking-heading); line-height: var(--site-leading-heading);
}
.tutorial-body > h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.tutorial-body h3 { margin: 32px 0 12px; font-size: var(--site-body); font-weight: 600; line-height: var(--site-leading-heading); }
.tutorial-body h4 { margin: 26px 0 10px; font-size: var(--site-body); font-weight: 600; }
.tutorial-body p { margin: 15px 0; }
.tutorial-body strong { font-weight: 600; }
.tutorial-body a { color: var(--site-violet); font-weight: 550; }
.tutorial-body a:hover { text-decoration: underline; text-underline-offset: 3px; }
.tutorial-body ul, .tutorial-body ol { margin: 15px 0; padding-left: 23px; }
.tutorial-body li { margin: 8px 0; }
.tutorial-body li::marker { color: var(--site-faint); }
.tutorial-body code {
  padding: 2px 6px; border: 1px solid var(--site-line); border-radius: var(--site-radius-xs);
  background: var(--site-tint-gray); font-family: var(--site-font-mono); font-size: .9em;
}
.tutorial-body pre {
  margin: 20px 0; padding: 17px 19px; overflow-x: auto;
  border: 1px solid rgba(25, 30, 36, .5); border-radius: var(--site-radius-sm);
  background: linear-gradient(180deg, #1c1f23, #101114); color: #d7dade;
}
.tutorial-body pre code { padding: 0; border: 0; background: none; color: inherit; font-size: 13px; line-height: 1.85; }
.tutorial-body blockquote {
  margin: 20px 0; padding: 15px 19px; border: 0;
  border-radius: 0 var(--site-radius-sm) var(--site-radius-sm) 0;
  background: var(--site-tint-lavender); color: var(--site-violet-deep); font-size: var(--site-small); line-height: var(--site-leading-prose);
}
.tutorial-table-wrap { margin: 20px 0; overflow-x: auto; border: 1px solid var(--site-line); border-radius: var(--site-radius-sm); }
.tutorial-body table { width: 100%; border-collapse: collapse; font-size: var(--site-small); }
.tutorial-body th {
  padding: 12px 15px; border-bottom: 1px solid var(--site-line); background: var(--site-ice);
  color: var(--site-muted); font-weight: 600; text-align: left; white-space: nowrap;
}
.tutorial-body td { padding: 13px 15px; border-bottom: 1px solid var(--site-line); vertical-align: top; line-height: var(--site-leading-body); font-variant-numeric: tabular-nums; }
.tutorial-body tbody tr:last-child td { border-bottom: 0; }

/* 上一章 / 下一章 */
.tutorial-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 46px; padding-top: 30px; border-top: 1px solid var(--site-line); }
.tutorial-nav-link {
  display: grid; gap: 6px; padding: 17px 19px; border: 1px solid var(--site-line); border-radius: var(--site-radius);
  background: #fff; box-shadow: var(--site-shadow-soft);
  transition: border-color var(--site-medium) var(--site-ease), box-shadow var(--site-medium) var(--site-ease);
}
.tutorial-nav-link:hover { border-color: var(--site-primary-border); box-shadow: var(--site-shadow); }
.tutorial-nav-link .dir { color: var(--site-faint); font-size: var(--site-micro); letter-spacing: .06em; }
.tutorial-nav-link strong { color: var(--site-ink); font-size: var(--site-small); font-weight: 600; }
.tutorial-nav-link.is-next { text-align: right; }
.tutorial-nav-link.is-empty { border: 0; background: none; box-shadow: none; }
.tutorial-nav-link.is-empty:hover { box-shadow: none; }

/* ---------------------------------------------------------------- 统一阅读与交互 */
.oc-eyebrow { display: none; }
.oc-step { padding: 24px 0; border: 0; border-top: 1px solid var(--site-line); border-radius: 0; background: transparent; }
.oc-feature { display: grid; grid-template-columns: 32px minmax(0,1fr); gap: 8px 16px; border: 0; border-radius: var(--site-radius); background: var(--site-surface-soft); }
.oc-feature:hover { transform: none; box-shadow: none; }
.oc-feature-icon { width: 32px; height: 32px; grid-row: 1 / 3; margin: 0; border: 0; background: transparent; color: var(--site-blue); }
.oc-feature h3, .oc-feature p { grid-column: 2; }
.oc-faq details { border: 0; border-block: 1px solid var(--site-line); border-radius: 0; }
.oc-cta { border: 0; border-radius: 0; box-shadow: none; background: var(--site-surface-soft); }
.oc-page-head { text-align: center; padding-top: 88px; }
.oc-page-head .site-section-title, .oc-page-head .site-section-copy { margin-inline: auto; }
.oc-page-head h1 { max-width: 940px; font-size: var(--oc-display); }
.tutorial-card a { border: 0; border-radius: var(--site-radius); background: var(--site-surface-soft); padding: 24px; }
.tutorial-card a:hover { transform: none; box-shadow: none; background: var(--site-primary-tint); }
.tutorial-card-main strong { font-size: 19px; }
.tutorial-group-title { font-size: 24px; }
.tutorial-controls { margin-bottom: 40px; padding-bottom: 28px; border-bottom: 1px solid var(--site-line); }
.tutorial-controls > label { display: block; font-size: 14px; margin-bottom: 10px; }
.tutorial-search-row { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 16px; }
.tutorial-search-row input { min-width: 0; width: 100%; min-height: 48px; padding: 0 16px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-bg); color: var(--site-ink); }
.tutorial-search-row button, .tutorial-levels button { min-height: 44px; padding: 0 16px; border: 0; border-radius: var(--site-button-radius); color: var(--site-ink); background: var(--site-surface-soft); font-size: 14px; cursor: pointer; }
.tutorial-search-row button:disabled { color: var(--site-muted); cursor: default; }
.tutorial-levels { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tutorial-levels button[aria-pressed="true"] { color: var(--site-white); background: var(--site-primary); }
.tutorial-result { margin: 16px 0 0; color: var(--site-muted); font-size: 13px; }
.tutorial-empty { padding: 48px 0; color: var(--site-muted); text-align: center; }
.tutorial-card[hidden], .tutorial-group[hidden], .tutorial-empty[hidden] { display: none; }
.oc-chapter-head .site-wrap { width: min(var(--oc-reading-width),calc(100% - var(--site-gutter)*2)); padding-left: 264px; }
.oc-chapter-layout { width: min(var(--oc-reading-width),calc(100% - var(--site-gutter)*2)); display: grid; grid-template-columns: 216px minmax(0,1fr); gap: 40px 48px; align-items: start; }
.oc-chapter-layout .tutorial-body { min-width: 0; width: 100%; }
.oc-chapter-layout .tutorial-nav { grid-column: 2; margin-top: 0; }
.chapter-outline { position: sticky; top: 96px; min-width: 0; }
.chapter-outline summary { min-height: 44px; padding: 10px 0; cursor: pointer; font-size: 14px; font-weight: 600; }
.chapter-outline nav { display: grid; gap: 4px; max-height: 65vh; overflow-y: auto; scrollbar-width: none; }
.chapter-outline nav::-webkit-scrollbar { display: none; }
.chapter-outline a { display: block; padding: 10px 12px; border-radius: var(--site-radius); color: var(--site-muted); font-size: 13px; line-height: 1.5; }
.chapter-outline a:hover, .chapter-outline a[aria-current="location"] { color: var(--site-blue); background: var(--site-primary-tint); }
.tutorial-body h2 { font-size: 26px; scroll-margin-top: 96px; }
.tutorial-body pre { position: relative; padding-top: 64px; border: 0; border-radius: var(--site-radius); background: #1d1d1f; }
.code-copy { position: absolute; right: 12px; top: 8px; min-height: 44px; padding: 0 12px; border: 1px solid #6e6e73; border-radius: var(--site-button-radius); color: #fff; background: transparent; font-size: 12px; cursor: pointer; }
.tutorial-body blockquote { border: 0; border-radius: var(--site-radius); color: var(--site-ink-soft); background: var(--site-surface-soft); }
.tutorial-table-wrap, .tutorial-nav-link { border-radius: var(--site-radius); }
.tutorial-nav-link { border: 0; background: var(--site-surface-soft); }

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

@media (prefers-reduced-motion: reduce) {
  .oc-feature, .tutorial-card a, .tutorial-nav-link, .oc-caret { transition: none; animation: none; }
  .oc-feature:hover, .tutorial-card a:hover { transform: none; }
}
@media (max-width: 1040px) {
  :root { --oc-display: 44px; }
  .oc-chapter-head .site-wrap { padding-left: 0; width: min(var(--site-measure),calc(100% - var(--site-gutter)*2)); }
  .oc-chapter-layout { width: min(var(--site-measure),calc(100% - var(--site-gutter)*2)); grid-template-columns: minmax(0,1fr); gap: 24px; }
  .oc-chapter-layout .tutorial-nav { grid-column: 1; }
  .chapter-outline { position: static; border-bottom: 1px solid var(--site-line); padding-bottom: 12px; }
  .oc-hero-grid { grid-template-columns: 1fr; }
  .oc-features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .oc-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  :root { --oc-display: 36px; }
  .oc-page-head { padding-top: 56px; }
  .tutorial-search-row { gap: 10px; }
  .tutorial-search-row button { padding-inline: 12px; }
  .tutorial-body h2 { font-size: 24px; }
  .oc-terminal-body { min-height: 0; }
  .tutorial-card a { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; padding: 15px 17px; }
  .tutorial-card-time { grid-column: 2; }
  .tutorial-nav { grid-template-columns: 1fr; }
  .tutorial-nav-link.is-next { text-align: left; }
}
@media (max-width: 560px) {
  :root { --oc-display: 32px; }
  .oc-features, .oc-steps { grid-template-columns: 1fr; }
  .oc-faq summary { padding: 15px 16px; }
  .oc-faq .oc-faq-body { padding: 0 16px 16px; }
}