/* ==========================================================================
   麻花星空无限 · 企业空间体验服务官网
   样式结构：base → layout → components → pages → responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

:root {
  --bg-page: #F4F2EC;
  --bg-surface: #FFFFFF;
  --bg-soft: #EDEAE2;
  --ink-strong: #23282D;
  --ink-mid: #4A545B;
  --ink-soft: #5E6B73;
  --line: #DCD7CC;
  --line-strong: #C7C1B4;
  --blue: #6E8CA0;
  --green: #7C9473;
  --purple: #8B7E9E;
  --orange: #B08968;
  --red: #A56A6A;
  --footer-bg: #1F2428;
  --footer-ink: #D7D4CC;
  --footer-mute: #9AA0A4;
  --radius: 6px;
  --radius-sm: 4px;
  --container: 1180px;
  --reading: 760px;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--ink-strong);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink-strong);
  line-height: 1.35;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

dl, dd, dt {
  margin: 0;
}

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

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

img {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   2. layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-page);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 通用容器：首页与内页共用 1180px 宽度 */
.header-inner,
.footer-inner,
.footer-bottom,
.hero-grid,
.conclusion-strip,
.capability-rows,
.scene-layout,
.evidence-list,
.method-role-layout,
.start-nodes,
.brief-columns,
.inner-main > .breadcrumb,
.inner-main > .page-header,
.inner-main > .page-hero,
.inner-main > .page-title-wrap,
.inner-main > .page-figure,
.inner-main > .page-layout,
.inner-main > .section,
.inner-main > .evidence-media,
.inner-main > .evidence-frame,
.inner-main > .evidence-list,
.inner-main > .deliverable-types,
.inner-main > .confirm-nodes,
.inner-main > .boundary-note,
.inner-main > .related-reads,
.inner-main > .version-status,
.inner-main > .method-media,
.inner-main > .method-steps,
.inner-main > .version-levels,
.inner-main > .change-principles,
.inner-main > .usage-limits,
.inner-main > .related-reading,
.inner-main > .role-list-section,
.inner-main > .handoff-section,
.inner-main > .decision-section,
.inner-main > .participation-section,
.inner-main > .related-section,
.inner-main > .path-overview,
.inner-main > .path-detail,
.inner-main > .path-materials,
.inner-main > .path-divergence,
.inner-main > .path-limits,
.inner-main > .related,
.inner-main > .section.scene-fit,
.inner-main > .section.combination,
.inner-main > .section.not-suitable {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 32px;
  padding-right: 32px;
}

.inner-main > .breadcrumb,
.inner-main > .page-header {
  padding-top: 28px;
}

/* 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: rgba(244, 242, 236, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.1) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink-strong);
  white-space: nowrap;
}

.brand:hover {
  color: var(--ink-strong);
}

.primary-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink-mid);
  border-radius: var(--radius-sm);
}

.nav-item > a:hover {
  color: var(--ink-strong);
  background-color: var(--bg-soft);
}

.nav-item.is-current > a {
  color: var(--ink-strong);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--blue);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink-strong);
  border-radius: 2px;
}

/* 页脚 */
.site-footer {
  margin-top: 80px;
  background-color: var(--footer-bg);
  color: var(--footer-ink);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 40px;
}

.footer-brand .footer-name {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-brand .footer-slogan {
  margin-top: 10px;
  font-size: 14px;
  color: var(--footer-ink);
}

.footer-brand .footer-desc {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--footer-mute);
}

.footer-heading {
  margin-bottom: 16px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #FFFFFF;
}

.footer-list li + li {
  margin-top: 10px;
}

.footer-list a {
  display: inline-block;
  min-height: 24px;
  font-size: 14px;
  color: var(--footer-ink);
}

.footer-list a:hover {
  color: #FFFFFF;
}

.footer-note p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--footer-mute);
}

.footer-bottom {
  padding-top: 18px;
  padding-bottom: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  font-size: 12px;
  color: var(--footer-mute);
}

/* --------------------------------------------------------------------------
   3. components · 通用组件
   -------------------------------------------------------------------------- */

/* 眉题 */
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.eyebrow-capability {
  color: var(--blue);
}

/* 区块标题组 */
.section-head {
  max-width: var(--reading);
  margin-bottom: 32px;
}

.section-head h2,
.section-title {
  margin-bottom: 12px;
  font-size: 27px;
}

.section-head p,
.section-desc,
.section-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--red);
  background-color: rgba(165, 106, 106, 0.1);
  border-radius: var(--radius-sm);
}

.section-tag--start {
  color: var(--red);
  background-color: rgba(165, 106, 106, 0.1);
}

/* 内容色标 */
.capability-tag {
  display: inline-block;
  min-width: 44px;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-align: center;
  border-radius: var(--radius-sm);
}

.tag-capability,
.tag-blue {
  color: var(--blue);
  background-color: rgba(110, 140, 160, 0.12);
}

.tag-acceptance {
  color: var(--green);
  background-color: rgba(124, 148, 115, 0.14);
}

.tag-method {
  color: var(--purple);
  background-color: rgba(139, 126, 158, 0.14);
}

.tag-role {
  color: var(--orange);
  background-color: rgba(176, 137, 104, 0.14);
}

.tag-start {
  color: var(--red);
  background-color: rgba(165, 106, 106, 0.12);
}

/* 文本入口 */
.entry-link,
.link-entry,
.text-link,
.btn-text,
.link-arrow,
.row-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  font-size: 15px;
  color: var(--blue);
}

.entry-link::after,
.link-entry::after,
.text-link::after,
.link-arrow::after,
.row-link::after {
  content: "→";
  font-size: 14px;
  transition: transform 0.18s ease;
}

.entry-link:hover::after,
.link-entry:hover::after,
.text-link:hover::after,
.link-arrow:hover::after,
.row-link:hover::after {
  transform: translateX(3px);
}

.entry-link-primary {
  padding: 0 20px;
  color: #FFFFFF;
  background-color: var(--ink-strong);
  border-radius: var(--radius);
}

.entry-link-primary:hover {
  color: #FFFFFF;
  background-color: #3A4248;
}

/* 字段列表 */
.field-list {
  display: grid;
  gap: 0;
}

.field-row {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.field-row dt {
  font-size: 13px;
  color: var(--ink-soft);
}

.field-row dd {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 图片容器 */
.hero-visual,
.evidence-media,
.page-figure,
.media-figure,
.content-media,
.evidence-figure,
.brief-media {
  overflow: hidden;
  background-color: var(--bg-soft);
  border-radius: var(--radius);
}

.hero-visual img,
.evidence-media img,
.page-figure img,
.media-figure img,
.content-media img,
.evidence-figure img,
.brief-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  padding: 10px 2px 0;
  font-size: 13px;
  color: var(--ink-soft);
}

/* 边界提示 */
.boundary-note {
  margin-top: 28px;
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
  background-color: var(--bg-soft);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-sm);
}

/* 相关阅读 */
.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.related-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-item a {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
}

.related-item p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.related-label {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-strong);
}

.related-desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   4. pages · 内页共用标题区
   -------------------------------------------------------------------------- */

.inner-main {
  padding-bottom: 20px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: var(--ink-soft);
}

.breadcrumb a:hover {
  color: var(--ink-strong);
}

.breadcrumb-sep {
  color: var(--line-strong);
}

.breadcrumb-current {
  color: var(--ink-mid);
}

.page-header {
  padding-bottom: 18px;
}

.page-title {
  max-width: 900px;
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.28;
  color: var(--ink-strong);
}

.page-hero {
  padding-top: 4px;
  padding-bottom: 36px;
}

.page-lead {
  max-width: var(--reading);
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-mid);
}

.page-hero-actions,
.page-hero-links,
.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 18px;
}

.page-title-wrap {
  padding-top: 0;
}

/* --------------------------------------------------------------------------
   5. pages · 首页
   -------------------------------------------------------------------------- */

/* 首屏 */
.hero {
  padding-top: 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 48px;
  align-items: start;
}

.hero-copy h1 {
  margin-top: 14px;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 600;
  line-height: 1.3;
}

.hero-lead {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-mid);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
}

.hero-visual {
  aspect-ratio: 7 / 5;
}

.hero-visual figcaption {
  padding: 10px 2px 0;
}

.conclusion-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 44px;
  border-top: 1px solid var(--line);
}

.conclusion-item {
  padding: 22px 24px 0 0;
}

.conclusion-item + .conclusion-item {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.conclusion-label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.conclusion-text {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 能力结构带 */
.capability-band {
  margin-top: 84px;
}

.capability-rows {
  border-top: 1px solid var(--line-strong);
}

.capability-row {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 40px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.capability-name {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.capability-name h3 {
  font-size: 20px;
}

.capability-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
}

.capability-body .row-link {
  margin-top: 8px;
}

/* 场景索引双栏 */
.scene-section {
  margin-top: 84px;
}

.scene-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.scene-index {
  position: sticky;
  top: 96px;
  padding: 22px 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.index-label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.index-list {
  margin-top: 14px;
}

.index-list li + li {
  margin-top: 4px;
}

.index-list a {
  display: block;
  min-height: 40px;
  padding: 8px 10px;
  font-size: 15px;
  color: var(--ink-mid);
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
}

.index-list a:hover {
  color: var(--ink-strong);
  background-color: var(--bg-soft);
  border-left-color: var(--blue);
}

.scene-item {
  padding-bottom: 32px;
  scroll-margin-top: 96px;
}

.scene-item + .scene-item {
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.scene-item h3 {
  margin-bottom: 14px;
  font-size: 21px;
}

.scene-item .field-row {
  grid-template-columns: 110px minmax(0, 1fr);
}

.scene-back {
  margin-top: 8px;
}

.scene-back a {
  font-size: 14px;
  color: var(--ink-soft);
}

/* 验收证据 */
.evidence-section {
  margin-top: 84px;
}

.evidence-media {
  max-width: var(--container);
  margin: 0 auto 32px;
  padding-left: 32px;
  padding-right: 32px;
}

.evidence-media img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
}

.evidence-list {
  border-top: 1px solid var(--line-strong);
}

.evidence-row {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 40px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.evidence-type {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.evidence-type h3 {
  font-size: 20px;
}

.evidence-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
}

.evidence-body .row-link {
  margin-top: 8px;
}

/* 方法与角色双栏 */
.method-role-section {
  margin-top: 84px;
}

.method-role-layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: start;
}

.method-column,
.role-column {
  padding: 28px 30px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method-column h3,
.role-column h3 {
  margin-bottom: 18px;
  font-size: 20px;
}

.method-steps {
  counter-reset: step;
}

.method-step {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.method-step .step-name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
}

.method-step .step-desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.method-column .row-link,
.role-column .row-link {
  margin-top: 18px;
}

.role-list {
  border-top: 1px solid var(--line);
}

.role-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.role-item .role-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

.role-item .role-desc {
  flex: 1 1 160px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 启动路径 */
.start-section {
  margin-top: 84px;
}

.start-nodes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.start-node {
  padding: 24px 24px 24px 0;
}

.start-node + .start-node {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.start-node .node-step {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
}

.start-node .node-output {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mid);
}

.start-node .node-judge {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.start-link {
  margin-top: 24px;
}

/* 需求简报入口 */
.brief-section {
  margin-top: 84px;
}

.brief-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.brief-col {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.brief-col h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.brief-col p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

.brief-link {
  margin-top: 24px;
}

/* --------------------------------------------------------------------------
   6. pages · 能力图谱
   -------------------------------------------------------------------------- */

.page-figure {
  max-width: var(--container);
  margin: 0 auto 48px;
  padding-left: 32px;
  padding-right: 32px;
}

.page-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  padding-bottom: 20px;
}

.capability-index {
  position: sticky;
  top: 96px;
  padding: 22px 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  font-size: 18px;
}

.aside-note {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.anchor-list {
  margin-top: 16px;
}

.anchor-list li + li {
  margin-top: 4px;
}

.anchor-list a {
  display: block;
  min-height: 40px;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--ink-mid);
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
}

.anchor-list a:hover {
  color: var(--ink-strong);
  background-color: var(--bg-soft);
  border-left-color: var(--blue);
}

.capability-detail {
  min-width: 0;
}

.capability-item {
  padding: 24px 0;
  scroll-margin-top: 96px;
  border-top: 1px solid var(--line);
}

.capability-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.capability-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.capability-head h2 {
  font-size: 22px;
}

/* 场景适配表 */
.section.scene-fit,
.section.combination,
.section.not-suitable,
.section.related {
  margin-top: 72px;
}

.field-table {
  border-top: 1px solid var(--line-strong);
}

.field-table-row {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 1.5fr 1.3fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.field-table-row .cell {
  min-width: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

.field-table-row .cell-label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* 能力组合 */
.combination-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.combination-card {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
}

.combination-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.combination-fit {
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.combination-card p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* 不适用情形 */
.boundary-list {
  border-top: 1px solid var(--line-strong);
}

.boundary-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 28px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-scene {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-strong);
}

.boundary-turn {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   7. pages · 验收证据
   -------------------------------------------------------------------------- */

.evidence-media {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  align-items: start;
  padding-bottom: 20px;
}

.evidence-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.evidence-meta {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.evidence-meta h2 {
  margin-bottom: 14px;
  font-size: 20px;
}

.meta-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.meta-row dt {
  font-size: 13px;
  color: var(--ink-soft);
}

.meta-row dd {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mid);
}

.evidence-frame,
.evidence-list,
.deliverable-types,
.confirm-nodes,
.boundary-note,
.related-reads {
  margin-top: 72px;
}

.frame-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.frame-col {
  padding: 22px 22px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: var(--radius);
}

.frame-col h3 {
  margin-bottom: 12px;
  font-size: 17px;
}

.frame-role,
.frame-material,
.frame-focus {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

.frame-role + .frame-material,
.frame-material + .frame-focus {
  margin-top: 8px;
}

.frame-role {
  color: var(--ink-strong);
  font-weight: 500;
}

/* 验收材料清单 */
.evidence-list .field-list {
  border-top: 1px solid var(--line-strong);
}

.evidence-list .field-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 20px;
  padding: 16px 0;
  border-top: 0;
  border-bottom: 1px solid var(--line);
}

.evidence-list .field-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-strong);
}

.evidence-list .field-stage,
.evidence-list .field-owner,
.evidence-list .field-form {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mid);
}

/* 成果类型 */
.type-list {
  border-top: 1px solid var(--line-strong);
}

.type-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.type-row h3 {
  font-size: 17px;
}

.type-content,
.type-focus {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 确认与变更节点 */
.node-list {
  border-top: 1px solid var(--line-strong);
}

.node-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.node-row .node-step {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

.node-trigger,
.node-record,
.node-impact {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 边界说明 */
.boundary-list {
  display: grid;
  gap: 0;
}

.boundary-item {
  padding: 14px 0 14px 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
  border-top: 1px solid var(--line);
  position: relative;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 8px;
  height: 8px;
  background-color: var(--orange);
  border-radius: 50%;
}

.boundary-hint {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.boundary-hint a {
  margin-right: 16px;
  color: var(--blue);
}

/* --------------------------------------------------------------------------
   8. pages · 方法版本
   -------------------------------------------------------------------------- */

.version-status {
  margin-top: 8px;
}

.version-status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.version-status-item {
  padding: 20px 22px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--purple);
  border-radius: var(--radius);
}

.status-public {
  border-left-color: var(--purple);
}

.status-project {
  border-left-color: var(--blue);
}

.status-scope {
  border-left-color: var(--orange);
}

.version-status-item .field-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.status-value {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
}

.status-desc {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mid);
}

.method-media {
  margin-top: 56px;
}

.method-media .media-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--radius);
}

.chapter-nav {
  margin-top: 24px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.chapter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.chapter-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: var(--ink-mid);
}

.chapter-list a:hover {
  color: var(--blue);
}

.method-steps {
  margin-top: 48px;
}

.method-steps > .section-title {
  margin-bottom: 24px;
}

.method-steps > .method-step {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 40px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.method-step-label .step-index {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--purple);
}

.method-step-label .step-name {
  margin-top: 6px;
  font-size: 20px;
}

.method-step-label .step-stage {
  margin-top: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.method-step-body .field-row {
  grid-template-columns: 96px minmax(0, 1fr);
}

/* 版本层级 */
.version-levels {
  margin-top: 72px;
}

.version-levels-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.version-level-item {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.level-public {
  border-top: 3px solid var(--purple);
}

.level-project {
  border-top: 3px solid var(--blue);
}

.level-change {
  border-top: 3px solid var(--orange);
}

.version-level-item .level-name {
  margin-bottom: 12px;
  font-size: 18px;
}

.version-level-item .field-label {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.version-level-item p:not(.field-label) {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 变更记录原则 */
.change-principles {
  margin-top: 72px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.principle-item {
  padding: 22px 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.principle-name {
  margin-bottom: 10px;
  font-size: 17px;
}

.principle-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* 使用限制 */
.usage-limits {
  margin-top: 72px;
}

.limit-list {
  border-top: 1px solid var(--line-strong);
}

.limit-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.limit-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

.limit-desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   9. pages · 角色索引
   -------------------------------------------------------------------------- */

.role-list {
  border-top: 1px solid var(--line-strong);
}

.role-row {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.role-row .role-name {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.role-row .role-name h3 {
  font-size: 19px;
}

.role-tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.role-tag-coordination {
  color: var(--orange);
  background-color: rgba(176, 137, 104, 0.14);
}

.role-tag-experience {
  color: var(--purple);
  background-color: rgba(139, 126, 158, 0.14);
}

.role-tag-content {
  color: var(--blue);
  background-color: rgba(110, 140, 160, 0.12);
}

.role-tag-space {
  color: var(--green);
  background-color: rgba(124, 148, 115, 0.14);
}

.role-tag-quality {
  color: var(--red);
  background-color: rgba(165, 106, 106, 0.12);
}

.role-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.role-field {
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.role-field dt {
  font-size: 13px;
  color: var(--ink-soft);
}

.role-field dd {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 协作交接点 */
.handoff-section,
.decision-section,
.participation-section,
.related-section {
  margin-top: 72px;
}

.handoff-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--radius);
}

.handoff-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.handoff-node {
  padding: 22px 22px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
}

.handoff-node .handoff-step {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.handoff-node h3 {
  margin: 6px 0 12px;
  font-size: 17px;
}

.handoff-field {
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.handoff-field dt {
  font-size: 12px;
  color: var(--ink-soft);
}

.handoff-field dd {
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mid);
}

/* 决策边界 */
.decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.decision-card {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.decision-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.decision-tag-content {
  color: var(--blue);
  background-color: rgba(110, 140, 160, 0.12);
}

.decision-tag-space {
  color: var(--green);
  background-color: rgba(124, 148, 115, 0.14);
}

.decision-tag-quality {
  color: var(--red);
  background-color: rgba(165, 106, 106, 0.12);
}

.decision-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.decision-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* 参与方式 */
.participation-list {
  border-top: 1px solid var(--line-strong);
}

.participation-row {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.participation-stage {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.stage-tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--orange);
  background-color: rgba(176, 137, 104, 0.14);
  border-radius: var(--radius-sm);
}

.participation-stage h3 {
  font-size: 18px;
}

.participation-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   10. pages · 启动路径
   -------------------------------------------------------------------------- */

.page-start-path .page-hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  align-items: start;
}

.page-start-path .page-hero .container {
  min-width: 0;
}

.content-media-inline img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.path-overview,
.path-detail,
.path-materials,
.path-divergence,
.path-limits,
.related-reading {
  margin-top: 72px;
}

.path-overview .container,
.path-detail .container,
.path-materials .container,
.path-divergence .container,
.path-limits .container,
.related-reading .container {
  min-width: 0;
}

.path-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.path-step {
  padding: 22px 20px 22px 0;
}

.path-step + .path-step {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.path-step .path-step-num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.path-step .path-step-name {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
}

.path-step .path-step-goal {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 节点详情 */
.path-detail .node-row {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.path-detail .node-row:first-of-type {
  border-top: 1px solid var(--line-strong);
}

.path-detail .node-label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.path-detail .node-index {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.path-detail .node-name {
  font-size: 19px;
}

.path-detail .field-row {
  grid-template-columns: 96px minmax(0, 1fr);
}

/* 启动资料准备 */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px 28px;
}

.material-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: var(--radius);
}

.material-name {
  margin-bottom: 8px;
  font-size: 16px;
}

.material-use {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 分歧处理 */
.divergence-list {
  border-top: 1px solid var(--line-strong);
}

.divergence-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr) minmax(0, 0.8fr);
  gap: 28px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.divergence-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-strong);
}

.divergence-handle {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

.divergence-owner {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 不承诺事项 */
.path-limits .limit-list {
  border-top: 1px solid var(--line-strong);
}

.path-limits .limit-item {
  padding: 14px 0 14px 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
  border-bottom: 1px solid var(--line);
  position: relative;
}

.path-limits .limit-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 8px;
  height: 8px;
  background-color: var(--red);
  border-radius: 50%;
}

/* --------------------------------------------------------------------------
   11. pages · 需求简报
   -------------------------------------------------------------------------- */

.page-container {
  width: 100%;
  max-width: var(--container);
}

.brief-purpose .purpose-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.purpose-col {
  padding: 24px 26px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
}

.purpose-col h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.purpose-col p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* 简报字段框架 */
.layout-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.brief-media {
  position: sticky;
  top: 96px;
}

.brief-media img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
}

.brief-field-list {
  border-top: 1px solid var(--line-strong);
}

.brief-field-list .field-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 28px;
  padding: 20px 0;
  border-top: 0;
  border-bottom: 1px solid var(--line);
}

.brief-field-list .field-label {
  padding-top: 2px;
}

.brief-field-list .field-index {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.brief-field-list .field-key {
  display: block;
  margin-top: 4px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-strong);
}

.brief-field-list .field-tip {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
}

.brief-field-list .field-hint {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 沟通议题 */
.topic-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.topic-table th,
.topic-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.topic-table thead th {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  background-color: var(--bg-soft);
  border-top: 1px solid var(--line-strong);
}

.topic-table tbody th {
  width: 26%;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-strong);
}

.topic-table td {
  line-height: 1.75;
  color: var(--ink-mid);
}

/* 准备边界 */
.bounds-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 28px;
}

.bounds-item {
  padding: 20px 22px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}

.bounds-item h3 {
  margin-bottom: 8px;
  font-size: 16px;
}

.bounds-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* 下一步入口 */
.next-steps {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line-strong);
}

.next-steps h3 {
  margin-bottom: 18px;
  font-size: 20px;
}

.next-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.next-item {
  padding: 20px 22px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-link {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-strong);
}

.next-item p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   12. pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  padding-top: 64px;
  padding-bottom: 40px;
}

.page-shell.error-shell {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.error-lead {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-mid);
}

.error-section {
  margin-top: 40px;
}

.error-section h2 {
  margin-bottom: 14px;
  font-size: 20px;
}

.error-list {
  border-top: 1px solid var(--line-strong);
}

.error-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mid);
}

.error-path {
  padding: 2px 8px;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-strong);
  background-color: var(--bg-soft);
  border-radius: var(--radius-sm);
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
}

.error-action {
  margin-top: 44px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  font-size: 15px;
  border-radius: var(--radius);
}

.btn-primary {
  color: #FFFFFF;
  background-color: var(--ink-strong);
}

.btn-primary:hover {
  color: #FFFFFF;
  background-color: #3A4248;
}

/* --------------------------------------------------------------------------
   13. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 36px;
  }

  .scene-layout,
  .page-layout.sidebar-left,
  .layout-shell {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 32px;
  }

  .capability-row,
  .evidence-row,
  .role-row,
  .participation-row,
  .path-detail .node-row,
  .method-steps > .method-step {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .field-table-row {
    grid-template-columns: 1.2fr 1.4fr 1.4fr 1.2fr;
    gap: 18px;
  }

  .frame-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .handoff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .path-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .path-step {
    padding: 20px 20px 20px 0;
  }

  .path-step:nth-child(4) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .path-step:nth-child(5) {
    border-top: 1px solid var(--line);
  }

  .materials-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-start-path .page-hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
  }

  .footer-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .header-inner,
  .footer-inner,
  .footer-bottom,
  .hero-grid,
  .conclusion-strip,
  .capability-rows,
  .scene-layout,
  .evidence-list,
  .method-role-layout,
  .start-nodes,
  .brief-columns,
  .inner-main > .breadcrumb,
  .inner-main > .page-header,
  .inner-main > .page-hero,
  .inner-main > .page-title-wrap,
  .inner-main > .page-figure,
  .inner-main > .page-layout,
  .inner-main > .section,
  .inner-main > .evidence-media,
  .inner-main > .evidence-frame,
  .inner-main > .evidence-list,
  .inner-main > .deliverable-types,
  .inner-main > .confirm-nodes,
  .inner-main > .boundary-note,
  .inner-main > .related-reads,
  .inner-main > .version-status,
  .inner-main > .method-media,
  .inner-main > .method-steps,
  .inner-main > .version-levels,
  .inner-main > .change-principles,
  .inner-main > .usage-limits,
  .inner-main > .related-reading,
  .inner-main > .role-list-section,
  .inner-main > .handoff-section,
  .inner-main > .decision-section,
  .inner-main > .participation-section,
  .inner-main > .related-section,
  .inner-main > .path-overview,
  .inner-main > .path-detail,
  .inner-main > .path-materials,
  .inner-main > .path-divergence,
  .inner-main > .path-limits,
  .inner-main > .related,
  .inner-main > .section.scene-fit,
  .inner-main > .section.combination,
  .inner-main > .section.not-suitable,
  .page-shell.error-shell {
    padding-left: 24px;
    padding-right: 24px;
  }

  /* 导航切换为抽屉 */
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: block;
    padding: 12px 24px 20px;
    background-color: var(--bg-page);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(35, 40, 45, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-item > a {
    display: flex;
    width: 100%;
    padding: 0 14px;
    font-size: 16px;
    border-left: 3px solid transparent;
  }

  .nav-item.is-current > a {
    box-shadow: none;
    border-left-color: var(--blue);
    background-color: var(--bg-soft);
  }

  /* 首屏单列 */
  .hero {
    padding-top: 36px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .hero-visual {
    aspect-ratio: 16 / 10;
  }

  .conclusion-strip {
    grid-template-columns: minmax(0, 1fr);
    margin-top: 32px;
  }

  .conclusion-item {
    padding: 18px 0;
  }

  .conclusion-item + .conclusion-item {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .capability-band,
  .scene-section,
  .evidence-section,
  .method-role-section,
  .start-section,
  .brief-section {
    margin-top: 60px;
  }

  /* 双栏模块改为单列，索引在前 */
  .scene-layout,
  .page-layout.sidebar-left,
  .layout-shell,
  .method-role-layout,
  .evidence-media {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .scene-index,
  .capability-index,
  .brief-media {
    position: static;
  }

  .brief-media img {
    aspect-ratio: 16 / 9;
  }

  .capability-row,
  .evidence-row,
  .role-row,
  .participation-row,
  .path-detail .node-row,
  .method-steps > .method-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .capability-name,
  .evidence-type,
  .role-row .role-name,
  .path-detail .node-label {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
  }

  .start-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .start-node {
    padding: 20px 20px 20px 0;
  }

  .start-node:nth-child(3) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .start-node:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .brief-columns,
  .combination-grid,
  .version-status-grid,
  .version-levels-grid,
  .decision-grid,
  .purpose-grid,
  .next-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .field-table-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px 24px;
  }

  .frame-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .evidence-list .field-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px 20px;
  }

  .type-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .node-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 10px 20px;
  }

  .node-row .node-step {
    grid-column: 1 / -1;
  }

  .boundary-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .role-fields {
    grid-template-columns: minmax(0, 1fr);
  }

  .handoff-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .path-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .path-step {
    border-top: 1px solid var(--line);
  }

  .path-step:nth-child(1),
  .path-step:nth-child(2) {
    border-top: 0;
  }

  .path-step:nth-child(3),
  .path-step:nth-child(5) {
    padding-left: 0;
    border-left: 0;
  }

  .materials-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .divergence-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .brief-field-list .field-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .bounds-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .topic-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .topic-table thead,
  .topic-table tbody,
  .topic-table tr,
  .topic-table th,
  .topic-table td {
    white-space: normal;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px 28px;
    padding-top: 44px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .header-inner,
  .footer-inner,
  .footer-bottom,
  .hero-grid,
  .conclusion-strip,
  .capability-rows,
  .scene-layout,
  .evidence-list,
  .method-role-layout,
  .start-nodes,
  .brief-columns,
  .inner-main > .breadcrumb,
  .inner-main > .page-header,
  .inner-main > .page-hero,
  .inner-main > .page-title-wrap,
  .inner-main > .page-figure,
  .inner-main > .page-layout,
  .inner-main > .section,
  .inner-main > .evidence-media,
  .inner-main > .evidence-frame,
  .inner-main > .evidence-list,
  .inner-main > .deliverable-types,
  .inner-main > .confirm-nodes,
  .inner-main > .boundary-note,
  .inner-main > .related-reads,
  .inner-main > .version-status,
  .inner-main > .method-media,
  .inner-main > .method-steps,
  .inner-main > .version-levels,
  .inner-main > .change-principles,
  .inner-main > .usage-limits,
  .inner-main > .related-reading,
  .inner-main > .role-list-section,
  .inner-main > .handoff-section,
  .inner-main > .decision-section,
  .inner-main > .participation-section,
  .inner-main > .related-section,
  .inner-main > .path-overview,
  .inner-main > .path-detail,
  .inner-main > .path-materials,
  .inner-main > .path-divergence,
  .inner-main > .path-limits,
  .inner-main > .related,
  .inner-main > .section.scene-fit,
  .inner-main > .section.combination,
  .inner-main > .section.not-suitable,
  .page-shell.error-shell {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand {
    font-size: 17px;
  }

  .page-title {
    font-size: 26px;
  }

  .hero-copy h1 {
    font-size: 27px;
  }

  .section-head h2,
  .section-title {
    font-size: 22px;
  }

  .capability-name h3,
  .evidence-type h3,
  .role-row .role-name h3,
  .path-detail .node-name,
  .method-step-label .step-name {
    font-size: 18px;
  }

  .field-row,
  .scene-item .field-row,
  .method-step-body .field-row,
  .path-detail .field-row,
  .meta-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .field-table-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .evidence-list .field-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .node-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .start-nodes {
    grid-template-columns: minmax(0, 1fr);
  }

  .start-node {
    padding: 18px 0;
    border-left: 0;
  }

  .start-node + .start-node {
    padding-left: 0;
    border-top: 1px solid var(--line);
  }

  .path-steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .path-step,
  .path-step + .path-step {
    padding: 16px 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .path-step:first-child {
    border-top: 0;
  }

  .chapter-list {
    flex-direction: column;
    gap: 0;
  }

  .chapter-list a {
    padding: 4px 0;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  .entry-link-primary {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .entry-link {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}