/* pre_web — landing page 特有样式 (基于 theme.css 之上)
   按 pre_ui VISUAL_STYLE_GUIDE.md (ref commit 9116477) 规范:
   - 扁平 IDE / cli 范式, 无窗口 chrome (无圆角/阴影/流量灯/居中标题)
   - 容器贴边填满, 严禁 max-width + margin:auto 居中
   - 内容区 (text/cli 输出) 走 .term-page 8-12px padding 例外
*/

/* ============================================================
   Page section — 容器贴边, 用 1px 下边界分隔
   ============================================================ */
.section {
  display: block;
  padding: 0;
  margin: 0;
  border-bottom: 1px solid var(--brdl);
  background: var(--bg);
  /* sticky tab-bar 高度补偿: anchor jump 时 section 顶部不被 tab-bar 遮住 */
  scroll-margin-top: 64px;
}
.section + .section { /* 邻接 section 之间无 gap, 1px border 自然分隔 */ }

/* === section 头部: .section-head 一行, 左 # anchor 标签 + 右元信息 === */
.section-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg2);
  border-bottom: 1px solid var(--brdl);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--dim);
}
.section-head .sh { color: var(--magenta); font-weight: bold; }
.section-head .grow { flex: 1; }

/* === section 主体: .term-page 默认走开放 padding === */
.section .term-page { padding: 10px 12px; }

/* ============================================================
   Hero
   ============================================================ */
.hero { padding: 0; margin: 0; }
.hero .term-page { padding: 16px 14px 18px; }

.hero-prompt {
  font-size: 12px;
  color: var(--dim);
  margin: 0 0 8px 0;
}
.hero-prompt .pa { margin-right: 6px; }

.hero h1 {
  font-size: 22px;
  line-height: 1.3;
  margin: 0 0 10px 0;
  color: var(--txt);
  letter-spacing: -0.005em;
  font-weight: 700;
}
.hero h1 .accent { color: var(--magenta); }
.hero h1 .accent2 { color: var(--cyan); }

.hero .lead {
  font-size: 13px;
  line-height: 1.7;
  color: var(--txt2);
  margin: 0 0 14px 0;
}
.hero .lead b { color: var(--txt); font-weight: 600; }

.hero-cta {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 0 0 12px 0;
}

.hero-install {
  background: var(--bg2);
  border-left: 3px solid var(--cyan);
  padding: 6px 10px;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px 0;
}
.hero-install code {
  background: none;
  color: var(--txt);
  padding: 0;
  flex: 1;
  white-space: nowrap;
  overflow-x: auto;
}
.copy-btn {
  background: var(--bg);
  border: 1px solid var(--brd);
  color: var(--txt2);
  padding: 1px 8px;
  border-radius: 2px;
  font-family: inherit;
  font-size: 10px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--blue); border-color: var(--blue); }
.copy-btn.copied { color: var(--cyan); border-color: var(--cyan); }

.hero-meta {
  display: flex; flex-wrap: wrap;
  gap: 4px 18px;
  font-size: 11px;
  color: var(--dim);
  border-top: 1px dashed var(--brdl);
  padding-top: 8px;
  margin-top: 4px;
}
.hero-meta strong { color: var(--txt2); font-weight: 500; }

/* ============================================================
   Architecture (ASCII 图块, 全宽贴边)
   ============================================================ */
.arch-body {
  padding: 0;
  background: var(--bg);
  overflow-x: auto;
}
.arch-body pre {
  border: 0;
  border-radius: 0;
  background: var(--bg);
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.55;
  margin: 0;
  color: var(--txt);
  white-space: pre;
}
.arch-body pre .b { color: var(--blue); font-weight: 600; }

/* ============================================================
   Feature grid — 2 列网格, 项与项之间 1px 分隔
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}
@media (max-width: 760px) {
  .features-grid { grid-template-columns: 1fr; }
}
.feat {
  padding: 10px 14px;
  border-right: 1px solid var(--brdl);
  border-bottom: 1px solid var(--brdl);
  background: var(--bg);
}
.feat:nth-child(2n) { border-right: 0; }
@media (max-width: 760px) {
  .feat { border-right: 0; }
}
.feat-num {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.feat-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--txt);
  margin: 0 0 6px 0;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.feat-body {
  font-size: 12px;
  line-height: 1.65;
  color: var(--txt2);
}
.feat-body code {
  font-size: 11px;
  color: var(--magenta);
  background: rgba(201,48,199,0.06);
}

/* ============================================================
   Modes table — 全宽
   ============================================================ */
.modes-body { padding: 10px 12px 14px; }
.modes-body h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px 0;
  color: var(--txt);
}
.modes-body h2 .sh { color: var(--magenta); }
.modes-intro {
  font-size: 12px; color: var(--txt2);
  margin: 0 0 10px 0;
}
.modes-body .tbl-section-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 14px 0 6px 0;
}

/* ============================================================
   Quick start steps
   ============================================================ */
.qs-body { padding: 10px 12px 14px; }
.qs-body h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px 0;
}
.qs-body .lead { font-size: 12px; color: var(--txt2); margin: 0 0 12px 0; }

.qs-step {
  display: flex; gap: 10px;
  margin: 10px 0;
}
.qs-step-n {
  flex-shrink: 0;
  width: 18px; height: 18px;
  color: var(--magenta);
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  line-height: 18px;
  border: 1px solid var(--magenta);
  border-radius: 2px;
}
.qs-step-body { flex: 1; min-width: 0; }
.qs-step-title {
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--txt);
}
.qs-step-body pre {
  margin-top: 4px;
  background: var(--bg);
  border: 1px dashed var(--brdl);
}

/* ============================================================
   Findings
   ============================================================ */
.findings-body { padding: 10px 12px 14px; }
.findings-body h2 { font-size: 15px; font-weight: 600; margin: 0 0 4px 0; }
.findings-body .lead { font-size: 12px; color: var(--txt2); margin: 0 0 12px 0; }
.find-row {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--brdl);
}
.find-row:last-child { border-bottom: 0; }
.find-cmd {
  font-size: 11px;
  color: var(--txt2);
  flex: 1;
  word-break: break-all;
}
.find-cmd .pa { margin-right: 6px; }

/* ============================================================
   GUI 预览
   ============================================================ */
.gui-body { padding: 10px 12px 14px; }
.gui-body h2 { font-size: 15px; font-weight: 600; margin: 0 0 4px 0; }
.gui-body .lead { font-size: 12px; color: var(--txt2); margin: 0 0 12px 0; }
.gui-shot {
  display: block;
  background: var(--bg2);
  padding: 10px;
  border: 1px solid var(--brdl);
}
.gui-shot img {
  display: block;
  width: 100%;
  border: 1px solid var(--brd);
}
.gui-shot-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 220px;
  background: var(--bg);
  border: 1px dashed var(--brd);
  color: var(--dim);
  font-size: 11px;
  text-align: center;
  padding: 16px;
}
.gui-shot-placeholder b { color: var(--blue); display: block; margin-bottom: 4px; }

/* ============================================================
   Footer — 容器贴边
   ============================================================ */
.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding: 12px;
  border-top: 1px solid var(--brd);
  background: var(--bg2);
  font-size: 11px;
  color: var(--dim);
}
.footer .col-block { min-width: 130px; }
.footer .col-block h4 {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 4px 0;
}
.footer .col-block a {
  display: block;
  color: var(--txt2);
  padding: 1px 0;
}
.footer .col-block a:hover { color: var(--blue); }
.footer .grow { min-width: 180px; flex: 1; }
.footer .grow p { margin: 0 0 4px 0; }
.footer .grow .brand {
  color: var(--blue);
  font-weight: 700;
}

/* ============================================================
   Responsive tweaks
   ============================================================ */
@media (max-width: 640px) {
  .hero h1 { font-size: 18px; }
  .hero .lead { font-size: 12px; }
  .tbl th, .tbl td { padding: 4px 8px; }
  .tbl { font-size: 11px; }
  .appbar .ctx { display: none; }
  .feat { padding: 8px 10px; }
}