/* Build（建站全流程）专用样式。变量沿用 style.css，只新增一个 --build 色。 */

:root { --build: #A78BFA; }
html[data-mode="light"] { --build: #6D4AE0; }

.build-hero .hero-kicker { color: var(--build); }
.build-hero-compact { padding-bottom: 18px; }
.build-hero-compact h1 { margin-bottom: 8px; }

/* 简介折叠 */
.bintro { margin: 6px 0 0; max-width: 720px; }
.bintro > summary { cursor: pointer; font-size: .88rem; color: var(--ink-3); list-style: none; }
.bintro > summary::-webkit-details-marker { display: none; }
.bintro > summary::before { content: "▸ "; }
.bintro[open] > summary::before { content: "▾ "; }
.bintro > summary:hover { color: var(--ink); }
.bintro p { margin: 8px 0 0; color: var(--ink-2); font-size: .92rem; }

/* 工具列：类型 tab + 进度，同一行 */
.btoolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 28px; margin-top: 16px; }
.btabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.btab {
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 7px 15px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
  font-size: .88rem; transition: border-color .15s, color .15s;
}
a.btab:hover { border-color: var(--build); color: var(--ink); }
.btab.is-active { border-color: var(--build); color: var(--ink); background: var(--surface-2); }
.btab.is-soon { opacity: .55; cursor: default; }
.btab em { font-style: normal; font-family: var(--font-mono); font-size: .68rem; color: var(--ink-3); }

/* 进度 */
.bprogress { min-width: 220px; flex: 0 1 300px; }
.bprogress-bar { height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; }
.bprogress-bar span { display: block; height: 100%; width: 0; background: var(--build); transition: width .25s; }
.bprogress-text { margin-top: 6px; font-family: var(--font-mono); font-size: .78rem; color: var(--ink-2); }
.bprogress-text b { color: var(--ink); }
.bprogress-reset {
  margin-left: 8px; background: none; border: none; padding: 0;
  font: inherit; color: var(--ink-3); text-decoration: underline; cursor: pointer;
}
.bprogress-reset:hover { color: var(--ink); }

/* Hub */
.build-card { border-left-color: var(--build); }
.build-card.is-soon { opacity: .6; }
.bflow {
  list-style: none; margin: 18px 0 40px; padding: 0 0 8px;
  display: flex; gap: 10px; overflow-x: auto; scroll-snap-type: x proximity;
}
.bflow-item {
  flex: 1 0 auto; min-width: 92px; scroll-snap-align: start;
  display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center;
  padding: 14px 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface);
}
.bflow-item.is-special { border-color: var(--build); }
.bflow-num {
  width: 26px; height: 26px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .78rem; color: var(--build); border: 1.5px solid var(--build);
}
.bflow-title { font-size: .86rem; font-weight: 600; white-space: nowrap; }

/* 类型页：左目录 + 右面板 */
.bwrap { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px; margin-top: 26px; align-items: start; }
.bnav { position: sticky; top: 76px; display: grid; gap: 10px; }
.bnav-item {
  display: flex; align-items: center; gap: 10px; width: 100%; text-align: left;
  padding: 9px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft); background: var(--surface); color: var(--ink-2);
  font: inherit; font-size: .9rem; cursor: pointer; transition: border-color .15s, color .15s;
}
.bnav-item:hover { border-color: var(--build); color: var(--ink); }
.bnav-item.is-active { border-color: var(--build); background: var(--surface-2); color: var(--ink); }
.bnav-item.is-special .bnav-num { background: var(--build); color: var(--bg); }
.bnav-num {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .72rem; color: var(--build); border: 1.5px solid var(--build);
}
.bnav-title { flex: 1; }
.bnav-count { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-3); }
.bnav-item.is-complete .bnav-num { background: var(--build); color: var(--bg); }
.bnav-item.is-complete .bnav-count { color: var(--build); }

.bpanels { min-width: 0; }
.bphase { display: none; }
.bphase.is-active { display: block; }
.bphase-head { display: none; }
.bphase-h2 { font-family: var(--font-display); font-size: 1.35rem; margin: 0 0 6px; display: flex; align-items: center; gap: 10px; }
.bphase-num {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 26px; height: 26px; border-radius: 50%;
  font-family: var(--font-mono); font-size: .78rem; color: var(--build); border: 1.5px solid var(--build);
}
.bphase .step-note { color: var(--ink-2); font-size: .92rem; margin: 0 0 16px; }

/* 检查清单 */
.bchecks { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 12px; }
.bcheck {
  display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
  padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft); background: var(--surface); line-height: 1.55; font-size: .93rem;
}
.bcheck:hover { border-color: var(--build); }
.bcheck input { margin-top: 5px; accent-color: var(--build); flex: none; }
.bcheck input:checked + span { color: var(--ink-3); text-decoration: line-through; }
.bchecks .is-special .bcheck { border-left: 3px solid var(--build); }
.btag {
  margin-left: auto; flex: none; align-self: center;
  font-style: normal; font-family: var(--font-mono); font-size: .68rem; color: var(--build);
  border: 1px solid var(--build); border-radius: 999px; padding: 1px 8px;
}

/* 笔记链接折叠 */
.blinks { margin-top: 4px; }
.blinks > summary { cursor: pointer; font-size: .86rem; color: var(--ink-3); padding: 4px 0; list-style: none; }
.blinks > summary::-webkit-details-marker { display: none; }
.blinks > summary::before { content: "▸ "; }
.blinks[open] > summary::before { content: "▾ "; }
.blinks > summary:hover { color: var(--ink); }
.blinks .step-items { margin-top: 8px; display: grid; gap: 8px; }
.blinks .step-item:hover { border-color: var(--build); }
.blinks .step-item-seq { color: var(--build); }

/* 上一步 / 下一步 */
.bstep-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line-soft); }
.bstep-btn {
  padding: 9px 18px; border-radius: 999px; font: inherit; font-size: .9rem; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
}
.bstep-btn:hover { border-color: var(--build); color: var(--ink); }
.bstep-btn.is-next { border-color: var(--build); color: var(--ink); }
.bstep-btn[hidden] { display: none; }
.bafter { padding: 20px; margin-top: 26px; }
.bafter p { color: var(--ink-2); margin: 8px 0 0; }

/* 手机：目录隐藏，阶段变手风琴 */
/* 检查项详情 */
.bchecks-bar { display: flex; justify-content: flex-end; margin: -4px 0 6px; }
.bdetail-all {
  background: none; border: none; padding: 0; font: inherit; font-size: .8rem;
  color: var(--ink-3); text-decoration: underline; cursor: pointer;
}
.bdetail-all:hover { color: var(--ink); }
.bcheck-row { display: flex; align-items: stretch; gap: 8px; }
.bcheck-row .bcheck { flex: 1; min-width: 0; }
.bdetail-btn {
  flex: none; align-self: center; cursor: pointer;
  padding: 6px 12px; border-radius: 999px; font: inherit; font-size: .78rem;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-3);
  transition: border-color .15s, color .15s;
}
.bdetail-btn::after { content: " ▾"; }
.bdetail-btn[aria-expanded="true"]::after { content: " ▴"; }
.bdetail-btn:hover { border-color: var(--build); color: var(--ink); }
.bdetail-btn[aria-expanded="true"] { border-color: var(--build); color: var(--build); }
.bdetail {
  margin: 8px 0 2px 28px; padding: 14px 16px;
  border: 1px solid var(--line); background: var(--surface-2);
  border-radius: var(--radius);
  font-size: .84rem; line-height: 1.7; color: var(--ink-2);
}
.bdetail[hidden] { display: none; }
.bdetail-steps { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.bdetail-steps li::marker { color: var(--build); font-family: var(--font-mono); font-size: .9em; }
.bdetail code {
  font-family: var(--font-mono); font-size: .92em; padding: 1px 7px; border-radius: 6px;
  background: var(--surface); border: 1px solid var(--line-soft); color: var(--ink);
}
.bdetail-note {
  display: flex; gap: 10px; align-items: baseline;
  margin: 12px 0 0; padding: 9px 12px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--line-soft);
}
.bdetail-note:first-child { margin-top: 0; }
.bdetail-note b {
  flex: none; font-weight: 600; font-size: .78rem; color: var(--ink);
  padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line);
}
.bdetail-note.is-warn b { border-color: var(--danger); }
.bdetail-note.is-tip b { border-color: var(--accent-2); }
.bdetail-note.is-example b { border-color: var(--build); color: var(--build); }

@media (max-width: 880px) {
  .bdetail { margin-left: 4px; padding: 12px; }
  .bcheck-row { flex-wrap: wrap; }
  .bdetail-btn { margin-left: 28px; }
  .bwrap { grid-template-columns: 1fr; gap: 0; margin-top: 18px; }
  .bnav { display: none; }
  .bphase { display: block; margin-bottom: 8px; }
  .bphase-head {
    display: flex; align-items: center; gap: 10px; width: 100%; text-align: left;
    padding: 12px 14px; border-radius: var(--radius-sm);
    border: 1px solid var(--line); background: var(--surface); color: var(--ink);
    font: inherit; font-weight: 600; cursor: pointer;
  }
  .bphase.is-active .bphase-head { border-color: var(--build); }
  .bphase-title { flex: 1; }
  .bphase-count { font-family: var(--font-mono); font-size: .72rem; font-weight: 500; color: var(--ink-3); }
  .bphase.is-complete .bphase-count { color: var(--build); }
  .bphase-body { display: none; padding: 14px 2px 6px; }
  .bphase.is-active .bphase-body { display: block; }
  .bphase-h2 { display: none; }
  .btag { display: none; }
  .btoolbar { flex-direction: column; align-items: stretch; }
  .bprogress { flex: none; }
}

/* 先看全貌：说明 + 思路图（默认收起） */
.bstory-open {
  margin: 10px 0 0; padding: 6px 14px; border-radius: 999px; cursor: pointer;
  font: inherit; font-size: .84rem; color: var(--ink-2);
  border: 1px solid var(--line); background: var(--surface);
}
.bstory-open:hover { border-color: var(--build); color: var(--ink); }

.bstory {
  margin: 36px 0 12px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.bstory[open] { border-color: var(--build); }
.bstory > summary {
  display: flex; align-items: baseline; justify-content: space-between; gap: 14px;
  padding: 18px 22px; cursor: pointer; list-style: none;
}
.bstory > summary::-webkit-details-marker { display: none; }
.bstory-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }
.bstory-title::before { content: "▸ "; color: var(--build); }
.bstory[open] .bstory-title::before { content: "▾ "; }
.bstory-hint { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); }
.bstory > summary:hover .bstory-title { color: var(--build); }

.bstory-body {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 32px;
  padding: 4px 22px 26px;
}
.bstory-text h3 {
  margin: 18px 0 6px; font-family: var(--font-mono); font-size: .76rem; font-weight: 500;
  letter-spacing: .08em; color: var(--build);
}
.bstory-text h3:first-child { margin-top: 0; }
.bstory-text p, .bstory-text li { font-size: .9rem; line-height: 1.7; color: var(--ink-2); margin: 0; }
.bstory-text ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
.bstory-text li::marker { color: var(--build); }

.bstory-cap { margin: 0 0 14px; font-size: .8rem; color: var(--ink-3); }
.sflow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; gap: 30px; }
.sflow-item { position: relative; }
.sflow-item:not(:last-child)::after {
  content: "↓"; position: absolute; left: 22px; bottom: -26px;
  font-family: var(--font-mono); font-size: 1.1rem; color: var(--build);
}
.sflow-node {
  display: flex; flex-direction: column; align-items: flex-start; gap: 6px;
  width: 100%; height: 100%; text-align: left; cursor: pointer;
  padding: 14px 16px; font: inherit; color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-2);
  transition: border-color .15s, transform .15s;
}
.sflow-node:hover { border-color: var(--build); transform: translateY(-2px); }
.sflow-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  font-family: var(--font-mono); font-size: .74rem; color: var(--build); border: 1.5px solid var(--build);
}
.sflow-title { font-family: var(--font-display); font-weight: 700; font-size: .98rem; }
.sflow-sub { font-size: .8rem; line-height: 1.5; color: var(--ink-3); }
.sflow-prep { margin-top: auto; padding-top: 8px; font-size: .78rem; line-height: 1.55; color: var(--ink-2); }
.sflow-prep b {
  display: inline-block; margin-right: 6px; padding: 0 7px; border-radius: 999px;
  font-weight: 500; font-size: .68rem; color: var(--build); border: 1px solid var(--build);
}

@media (min-width: 1180px) {
  .sflow { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 24px; }
  .sflow-item:not(:last-child)::after { content: "→"; left: auto; right: -20px; top: 20px; bottom: auto; }
}
@media (max-width: 880px) {
  .bstory-body { grid-template-columns: 1fr; gap: 24px; padding: 4px 16px 22px; }
  .bstory > summary { padding: 16px; flex-direction: column; gap: 4px; }
}

/* ===== 架构图版面（说明卡片 + 完整思路图） ===== */
.bstory-intro { padding: 2px 22px 8px; }
.bstory-lead { margin: 0 0 16px; font-size: .95rem; line-height: 1.75; color: var(--ink-2); max-width: 820px; }
.bstory-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.bstory-card {
  padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-2);
}
.bstory-card h3 { margin: 0 0 8px; font-family: var(--font-mono); font-size: .74rem; font-weight: 500; letter-spacing: .08em; color: var(--build); }
.bstory-card ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
.bstory-card li { font-size: .84rem; line-height: 1.65; color: var(--ink-2); }
.bstory-card li::marker { color: var(--build); }
.bstory-canvas { padding: 8px 22px 26px; }

.cv-cap { margin: 0 0 16px; font-size: .8rem; color: var(--ink-3); }
.cv-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 1fr);
  column-gap: 52px; row-gap: 38px; align-items: stretch;
}
.cv-row { display: contents; }
.cv-colhead {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em; color: var(--ink-3);
  text-align: center; margin-bottom: -18px;
}

/* 目标 */
.cv-goal-wrap { grid-column: 2; position: relative; }
.cv-goal-wrap::after, .cv-node-wrap::after {
  content: "↓"; position: absolute; left: 50%; bottom: -31px; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 1.15rem; color: var(--c, #34C38F);
}
.cv-goal {
  display: flex; flex-direction: column; gap: 4px; text-align: center; padding: 14px 16px;
  border: 1.5px solid #34C38F; border-radius: var(--radius);
  background: color-mix(in srgb, #34C38F 14%, var(--surface));
}
.cv-goal-title { font-family: var(--font-display); font-weight: 700; }
.cv-goal-sub { font-size: .8rem; line-height: 1.5; color: var(--ink-2); }

/* 主流程：三栏对齐 */
.cv-think, .cv-tools {
  position: relative; padding: 12px 14px; align-self: stretch; display: flex; flex-direction: column; justify-content: center;
  border: 1px dashed color-mix(in srgb, var(--c) 55%, var(--line)); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--c) 7%, var(--surface));
}
.cv-think ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
.cv-think li { font-size: .84rem; line-height: 1.6; color: var(--ink-2); font-style: italic; }
.cv-think li::marker { color: var(--c); }
.cv-think::after, .cv-node-wrap::before {
  content: "→"; position: absolute; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 1.15rem; color: var(--c);
}
.cv-think::after { right: -36px; }
.cv-node-wrap { position: relative; display: flex; }
.cv-node-wrap::before { right: -36px; }

.cv-node {
  display: flex; flex-direction: column; align-items: flex-start; gap: 5px; width: 100%; text-align: left;
  padding: 14px 16px; font: inherit; color: var(--ink); cursor: pointer;
  border: 1.5px solid var(--c); border-radius: var(--radius);
  background: color-mix(in srgb, var(--c) 14%, var(--surface));
  transition: transform .15s, box-shadow .15s;
}
.cv-node:hover { transform: translateY(-2px); box-shadow: 0 6px 18px color-mix(in srgb, var(--c) 28%, transparent); }
.cv-num {
  display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%;
  background: var(--c); color: #0B1220; font-family: var(--font-mono); font-size: .76rem; font-weight: 700;
}
.cv-title { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; }
.cv-sub { font-size: .8rem; line-height: 1.5; color: var(--ink-2); }
.cv-prep { margin-top: 4px; font-size: .78rem; line-height: 1.55; color: var(--ink-2); }
.cv-prep b {
  display: inline-block; margin-right: 6px; padding: 0 7px; border-radius: 999px;
  font-weight: 500; font-size: .68rem; color: var(--c); border: 1px solid var(--c);
}

/* 工具标签 */
.cv-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.cv-chip {
  display: inline-block; padding: 4px 11px; border-radius: 999px; font-size: .78rem; line-height: 1.4;
  color: var(--ink); border: 1px solid color-mix(in srgb, var(--c, var(--build)) 60%, var(--line));
  background: var(--surface);
}
a.cv-chip:hover { background: color-mix(in srgb, var(--c, var(--build)) 16%, var(--surface)); }

/* 循环、结果、总结（跨满三栏，居中） */
.cv-loop-wrap, .cv-results-wrap { grid-column: 1 / -1; }
.cv-loop {
  --c: #F0647A; max-width: 760px; margin: 0 auto; padding: 16px 18px; position: relative;
  border: 1.5px solid var(--c); border-radius: var(--radius); background: color-mix(in srgb, var(--c) 9%, var(--surface));
}
.cv-loop-title { font-family: var(--font-display); font-weight: 700; margin-bottom: 10px; color: var(--c); }
.cv-loop-steps { list-style: none; margin: 0 0 12px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cv-loop-steps li {
  position: relative; padding: 10px 12px; border-radius: var(--radius-sm); background: var(--surface);
  border: 1px solid var(--line); display: flex; flex-direction: column; gap: 3px;
}
.cv-loop-steps li:not(:last-child)::after {
  content: "→"; position: absolute; right: -19px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); color: var(--c);
}
.cv-loop-steps b { font-size: .88rem; }
.cv-loop-steps span { font-size: .78rem; line-height: 1.5; color: var(--ink-3); }

.cv-results { max-width: 760px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cv-result {
  display: flex; flex-direction: column; gap: 4px; padding: 12px 16px; border-radius: var(--radius);
  border: 1.5px solid #34C38F; background: color-mix(in srgb, #34C38F 10%, var(--surface));
}
.cv-result:nth-child(2) { border-color: #4C8DFF; background: color-mix(in srgb, #4C8DFF 10%, var(--surface)); }
.cv-result b { font-size: .86rem; }
.cv-result span { font-size: .82rem; line-height: 1.55; color: var(--ink-2); }

.cv-summary {
  display: flex; align-items: flex-start; gap: 12px; margin-top: 22px; padding: 14px 18px;
  border: 1px dashed var(--line); border-radius: var(--radius); background: var(--surface-2);
}
.cv-summary p { margin: 0; font-size: .88rem; line-height: 1.7; color: var(--ink-2); }
.cv-summary b { margin-right: 10px; color: var(--ink); }

/* 窄屏：每个步骤叠成一张卡，只保留向下的箭头 */
@media (max-width: 1099px) {
  .bstory-intro { padding: 2px 16px 8px; }
  .bstory-canvas { padding: 8px 16px 22px; }
  .cv-grid { grid-template-columns: 1fr; row-gap: 40px; }
  .cv-colhead { display: none; }
  .cv-goal-wrap { grid-column: 1; }
  .cv-goal-wrap::after { bottom: -33px; }
  .cv-row { display: grid; gap: 10px; position: relative; }
  .cv-row::after {
    content: "↓"; position: absolute; left: 50%; bottom: -34px; transform: translateX(-50%);
    font-family: var(--font-mono); font-size: 1.15rem; color: var(--c);
  }
  .cv-node-wrap { order: 1; }
  .cv-think { order: 2; }
  .cv-tools { order: 3; }
  .cv-think::after, .cv-node-wrap::before, .cv-node-wrap::after { content: none; }
  .cv-loop-steps { grid-template-columns: 1fr; gap: 20px; }
  .cv-loop-steps li:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -19px; transform: translateX(-50%); }
  .cv-results { grid-template-columns: 1fr; }
}