/* ============================================================
   components.css —— 代码块、提示词卡、callout、踩坑卡、动手试试
   ============================================================ */

/* ---------- 章首 / 章末提要 ---------- */
.chapter-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-muted);
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 14px;
}
.chapter-meta::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--accent);
}
.chapter-lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0 0 32px;
  line-height: 1.7;
}
.chapter-summary {
  background: var(--primary-soft);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 0 0 32px;
  display: flex;
  gap: 14px;
  border: 1px solid rgba(62, 78, 204, 0.12);
}
.chapter-summary__icon {
  flex: 0 0 24px;
  color: var(--primary);
  margin-top: 2px;
}
.chapter-summary__body { color: var(--ink-soft); }
.chapter-summary__body strong { color: var(--primary-deep); display: block; margin-bottom: 4px; }
.chapter-summary--end {
  background: var(--success-soft);
  border-color: rgba(47, 158, 110, 0.18);
  margin: 48px 0 0;
}
.chapter-summary--end .chapter-summary__icon { color: var(--success); }
.chapter-summary--end .chapter-summary__body strong { color: #1f6f4d; }

/* ---------- 代码块 ---------- */
.code {
  position: relative;
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: var(--radius);
  margin: 1.4rem 0;
  box-shadow: var(--shadow-2);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  overflow: hidden;
}
.code__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.74rem;
  color: var(--code-muted);
  letter-spacing: 0;
  text-transform: uppercase;
}
.code__bar-lang { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; }
.code__bar-lang::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--code-accent);
}
.code__copy {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--code-muted);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0;
  transition: color .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
  font-family: inherit;
  text-transform: uppercase;
}
.code__copy:hover {
  color: var(--code-ink);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.06);
}
.code__copy.is-done {
  color: var(--success);
  border-color: rgba(47, 158, 110, 0.5);
}
.code pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}
.code code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}
/* 语法高亮(轻量手写) */
.code .tk-cmt { color: var(--code-comment); font-style: italic; }
.code .tk-str { color: var(--code-string); }
.code .tk-key { color: var(--code-key); }
.code .tk-acc { color: var(--code-accent); }
.code .tk-mut { color: var(--code-muted); }

/* 代码块紧凑变体(单行命令) */
.code--inline { margin: 0.8rem 0; }
.code--inline pre { padding: 12px 14px; }

/* ---------- 提示词卡片 ---------- */
.prompt-card {
  position: relative;
  background: var(--primary-soft);
  border-radius: var(--radius);
  margin: 1.4rem 0;
  padding: 18px 22px 18px 26px;
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-1);
}
.prompt-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 12px;
}
.prompt-card__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--primary-deep);
  font-weight: 700;
}
.prompt-card__label::before {
  content: "";
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
  background-image: linear-gradient(135deg, var(--primary), var(--accent));
}
.prompt-card__copy {
  background: white;
  border: 1px solid rgba(62, 78, 204, 0.18);
  color: var(--primary-deep);
  font-size: 0.74rem;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0;
  font-family: var(--font-sans);
  text-transform: uppercase;
  font-weight: 600;
  transition: background .15s var(--ease), border-color .15s var(--ease);
}
.prompt-card__copy:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.prompt-card__copy.is-done { background: var(--success); color: white; border-color: var(--success); }
.prompt-card__body {
  color: var(--ink);
  font-size: 0.96rem;
  line-height: 1.75;
  font-family: var(--font-sans);
  white-space: pre-wrap;
}
.prompt-card__note {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(62, 78, 204, 0.2);
  color: var(--ink-soft);
  font-size: 0.85rem;
  line-height: 1.7;
}
.prompt-card__note::before {
  content: "为什么这么说?";
  display: inline-block;
  margin-right: 6px;
  font-weight: 700;
  color: var(--primary-deep);
}

/* ---------- 四色 callout ---------- */
.callout {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius);
  margin: 1.4rem 0;
  border-left: 4px solid;
  background: var(--surface);
  box-shadow: var(--shadow-1);
  line-height: 1.75;
}
.callout__icon {
  flex: 0 0 22px;
  margin-top: 2px;
}
.callout__title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--ink);
}
.callout__body { color: var(--ink-soft); font-size: 0.95rem; }
.callout__body p:last-child { margin-bottom: 0; }
.callout p { margin-bottom: 0.6em; }
.callout--note    { background: var(--surface-2); border-left-color: #B5BAC6; }
.callout--note    .callout__icon { color: var(--ink-soft); }
.callout--tip     { background: var(--success-soft); border-left-color: var(--success); }
.callout--tip     .callout__icon { color: var(--success); }
.callout--tip     .callout__title { color: #1f6f4d; }
.callout--warning { background: var(--warning-soft); border-left-color: var(--warning); }
.callout--warning .callout__icon { color: var(--warning); }
.callout--warning .callout__title { color: #8b5310; }
.callout--danger  { background: var(--danger-soft); border-left-color: var(--danger); }
.callout--danger  .callout__icon { color: var(--danger); }
.callout--danger  .callout__title { color: #8b2828; }

/* ---------- 「动手试试」 ---------- */
.exercise {
  background: var(--accent-soft);
  border: 1.5px dashed var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 1.8rem 0;
}
.exercise__head {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #a04a28;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.exercise__head svg { color: var(--accent); }
.exercise__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}
.exercise__body { color: var(--ink-soft); }
.exercise__body p { margin-bottom: 0.6em; }
.exercise__steps {
  margin: 10px 0;
  padding-left: 1.4em;
  counter-reset: stepcount;
  list-style: none;
}
.exercise__steps li {
  position: relative;
  padding-left: 6px;
  margin: 0.4em 0;
}
.exercise__steps li::before {
  counter-increment: stepcount;
  content: counter(stepcount);
  position: absolute;
  left: -1.7em;
  top: 0.15em;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-size: 0.78rem;
  font-weight: 700;
  display: inline-grid; place-items: center;
}
.exercise__done {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(232, 112, 74, 0.3);
  color: #8b3a18;
  font-size: 0.88rem;
}
.exercise__done strong { color: #8b3a18; }

/* ---------- 「常见踩坑」 ---------- */
.pitfall-group { margin: 1.8rem 0; }
.pitfall-group__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--danger);
  margin-bottom: 12px;
}
.pitfall {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: box-shadow .2s var(--ease);
}
.pitfall:hover { box-shadow: var(--shadow-1); }
.pitfall[open] { border-color: var(--danger); box-shadow: var(--shadow-1); }
.pitfall > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--ink);
  font-size: 0.96rem;
}
.pitfall > summary::-webkit-details-marker { display: none; }
.pitfall > summary::before {
  content: "";
  flex: 0 0 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
}
.pitfall > summary::after {
  content: "+";
  margin-left: auto;
  width: 24px; height: 24px;
  display: inline-grid; place-items: center;
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--ink-soft);
  font-size: 1.2rem;
  line-height: 1;
  font-weight: 400;
  transition: transform .2s var(--ease), background .2s var(--ease);
}
.pitfall[open] > summary::after { transform: rotate(45deg); background: var(--danger-soft); color: var(--danger); }
.pitfall__body {
  padding: 0 18px 16px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.75;
}
.pitfall__body dl { margin: 0; }
.pitfall__body dt {
  font-weight: 700;
  color: var(--danger);
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-top: 10px;
}
.pitfall__body dd { margin: 4px 0 8px; }

/* ---------- 截图占位 ---------- */
.figure {
  margin: 1.6rem 0;
}
.figure__img {
  border-radius: var(--radius);
  background: var(--surface-2);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  border: 1px solid var(--border);
}
.figure__img > img {
  width: 100%;
  height: auto;
  object-fit: contain;
}
.figure__img--placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--ink-muted);
  font-size: 0.88rem;
  background-image:
    linear-gradient(45deg, transparent 49%, var(--border) 49%, var(--border) 51%, transparent 51%),
    linear-gradient(-45deg, transparent 49%, var(--border) 49%, var(--border) 51%, transparent 51%);
  background-size: 24px 24px;
  background-color: var(--surface);
}
.figure__img--placeholder svg { color: var(--ink-muted); }
.figure__cap {
  text-align: center;
  color: var(--ink-muted);
  font-size: 0.85rem;
  margin-top: 8px;
  line-height: 1.6;
}
.figure__cap b { color: var(--ink-soft); }

.partial-error {
  background: var(--warning-soft);
  border: 1px solid rgba(201, 122, 31, 0.24);
  border-radius: var(--radius);
  padding: 14px;
  margin: 0 0 16px;
  color: #7a4b12;
  font-size: 0.88rem;
  line-height: 1.6;
}
.partial-error strong,
.partial-error span,
.partial-error code {
  display: block;
}
.partial-error code {
  margin-top: 8px;
  color: #7a4b12;
  background: rgba(255, 255, 255, 0.58);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease), transform .12s var(--ease);
  cursor: pointer;
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border);
}
.btn:hover { border-color: var(--ink-muted); }
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-1);
}
.btn--primary:hover {
  background: var(--primary-deep);
  border-color: var(--primary-deep);
  color: white;
}
.btn--accent {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn--accent:hover { background: #ce5e3a; color: white; border-color: #ce5e3a; }
.btn--ghost { background: transparent; }
.btn--lg { font-size: 1.02rem; padding: 14px 24px; }

/* ---------- Hero / Landing 用 ---------- */
.hero {
  padding: 42px 24px 36px;
  display: block;
  max-width: 1400px;
  margin: 0 auto;
}
.hero__inner {
  width: 100%;
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(288px, 380px);
  gap: 52px;
  align-items: center;
  padding: 36px 0 34px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.hero__copy,
.hero__side {
  min-width: 0;
}
.hero__copy {
  max-width: 800px;
}
.hero__side {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
  padding: 0 0 0 32px;
  border-left: 1px solid var(--border);
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--primary-deep);
  background: transparent;
  padding: 0;
  font-weight: 600;
  letter-spacing: 0;
  margin-bottom: 16px;
}
.hero__tag::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--accent);
  border-radius: 999px;
}
.hero__title {
  font-size: 2.72rem;
  letter-spacing: 0;
  line-height: 1.12;
  margin: 0 0 18px;
}
.hero__title em {
  background: linear-gradient(120deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 0;
}
.hero__sub {
  font-size: 1.08rem;
  line-height: 1.68;
  color: var(--ink-soft);
  margin: 0;
}
.hero__cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero .hero__cta {
  flex-direction: column;
  flex-wrap: nowrap;
}
.hero .hero__cta .btn {
  justify-content: center;
  min-height: 52px;
  box-shadow: none;
}
.hero__meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--ink-muted);
  font-size: 0.9rem;
}
.hero .hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.hero__meta span {
  min-width: 0;
  line-height: 1.35;
}
.hero__meta b {
  color: var(--ink);
  display: block;
  font-size: 1.52rem;
  line-height: 1;
  margin-bottom: 6px;
}

@media (max-width: 1100px) {
  .hero__inner {
    max-width: none;
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 34px 0;
  }
  .hero__side {
    align-self: stretch;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 0 0;
    border-left: 0;
    border-top: 1px solid var(--border);
  }
  .hero .hero__cta {
    flex: 0 0 300px;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .hero .hero__meta {
    flex: 1 1 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
    padding-top: 0;
    border-top: 0;
  }
}

/* 卡片网格 */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 1.6rem 0;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
}
.card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.card__num {
  display: inline-grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
  margin-bottom: 12px;
}
.card__title { font-weight: 700; font-size: 1.05rem; color: var(--ink); margin: 0 0 6px; }
.card__body { color: var(--ink-soft); font-size: 0.94rem; line-height: 1.7; margin: 0; }
.card a { color: inherit; }

/* 章节快速导航卡片(用于首页) */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin: 1.6rem 0;
}
.chapter-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: block;
  position: relative;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
}
.chapter-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
  color: var(--ink);
}
.chapter-card__num {
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 6px;
}
.chapter-card__title { font-size: 1.05rem; font-weight: 700; color: var(--ink); margin: 0 0 6px; line-height: 1.4; }
.chapter-card__body { color: var(--ink-soft); font-size: 0.9rem; line-height: 1.6; margin: 0; }
.chapter-card__badge {
  position: absolute;
  top: 14px; right: 14px;
  font-size: 0.7rem;
  letter-spacing: 0;
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 700;
}
.chapter-card__badge--full {
  background: var(--success-soft);
  color: #1f6f4d;
}
.chapter-card__badge--draft {
  background: var(--surface-2);
  color: var(--ink-muted);
}
.chapter-card__badge--inline {
  position: static;
  vertical-align: middle;
}

/* 双路线首页 */
.course-paths {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 1.8rem 0;
}
.path-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-1);
}
.path-card__eyebrow {
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
  margin-bottom: 8px;
}
.path-card__title {
  font-size: 1.3rem;
  margin: 0 0 8px;
}
.path-card__body {
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.75;
  margin: 0 0 16px;
}
.path-card__list {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}
.path-card__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 1.4rem 0;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.feature-card__title {
  font-size: 1rem;
  margin: 0 0 6px;
  color: var(--ink);
}
.feature-card__body {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-weight: 600;
  letter-spacing: 0;
}
.tag--warn { background: var(--warning-soft); color: #8b5310; }
.tag--ok { background: var(--success-soft); color: #1f6f4d; }
.tag--mute { background: var(--surface-2); color: var(--ink-muted); }

/* 步骤条 (首页用) */
.steps {
  position: relative;
  margin: 1.6rem 0;
  padding-left: 28px;
  border-left: 2px solid var(--border);
}
.step {
  position: relative;
  padding: 0 0 20px 16px;
}
.step::before {
  content: "";
  position: absolute;
  left: -34px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1.5px var(--primary);
}
.step__title { font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.step__body { color: var(--ink-soft); font-size: 0.94rem; margin: 0; }

/* 责任划线 (责任明显处) */
.lede-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-muted);
  font-size: 0.82rem;
  letter-spacing: 0;
  text-transform: uppercase;
  margin: 32px 0 16px;
  font-weight: 600;
}
.lede-divider::before, .lede-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 34px 16px 30px;
  }
  .hero__inner {
    grid-column: 1;
    max-width: var(--content-max);
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px 0;
  }
  .hero__title {
    font-size: 2.14rem;
    line-height: 1.15;
    margin-bottom: 18px;
  }
  .hero__sub { font-size: 1.05rem; }
  .hero__side {
    flex-direction: column;
    align-items: stretch;
    gap: 22px;
  }
  .hero .hero__cta {
    flex-direction: column;
    flex: 1 1 auto;
  }
  .hero .hero__meta {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 18px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
  }
  .hero__meta b { font-size: 1.45rem; }
  .course-paths { grid-template-columns: 1fr; }
  .path-card { padding: 18px; }
  .btn--lg { width: 100%; justify-content: center; }
}