/* ============================================================
   吃瓜爆料 · 全站样式表
   Base / Layout / Components / Pages / Responsive
   配色：米白底 #F5F4F0 · 深字 #202227 · 橙 #E8590C · 蓝 #2F6FED
   ============================================================ */

/* ---------- Base ---------- */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #202227;
  background-color: #F5F4F0;
  min-height: 100vh;
}

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

a {
  color: #E8590C;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.4;
  color: #202227;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 17px;
}

p {
  margin-bottom: 12px;
}

summary {
  cursor: pointer;
}

/* 无障碍：尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Layout：全站骨架 ---------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #D8D6D2;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #202227;
  letter-spacing: 0;
}

.brand-tag {
  font-size: 13px;
  color: #60656C;
  white-space: nowrap;
}

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

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #202227;
  border-radius: 4px;
  line-height: 1.5;
}

.site-nav .nav-list li a:hover {
  color: #E8590C;
  background-color: #F5F4F0;
  text-decoration: none;
}

.site-nav .nav-list li a.is-current {
  color: #E8590C;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  background-color: #FFFFFF;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 0;
}

.toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #202227;
}

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

.site-footer {
  background-color: #202227;
  color: #D8D6D2;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 20px 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h2 {
  font-size: 16px;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: #D8D6D2;
  font-size: 14px;
}

.footer-col ul li a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 20px;
  text-align: center;
  font-size: 13px;
  color: #8A8F98;
}

.footer-bottom p {
  margin-bottom: 0;
}

/* ---------- Layout：内页公共骨架 ---------- */

.inner-main {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 20px 0;
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: #60656C;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #D8D6D2;
}

.breadcrumb a {
  color: #60656C;
}

.breadcrumb a:hover {
  color: #E8590C;
}

.breadcrumb-sep {
  color: #B0B3B8;
}

.breadcrumb-current {
  color: #202227;
}

.page-header {
  margin-bottom: 36px;
}

.page-title {
  font-size: 28px;
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: #60656C;
  max-width: 720px;
  margin-bottom: 0;
}

/* 内容区块通用分隔 */
.content-section,
.content-block,
.section-block {
  margin-bottom: 48px;
}

.content-section h2,
.content-block h2,
.section-block h2 {
  margin-bottom: 16px;
  padding-top: 4px;
}

.content-section h2::before,
.content-block h2::before,
.section-block h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background-color: #2F6FED;
  margin-right: 10px;
  vertical-align: -3px;
  border-radius: 2px;
}

/* ---------- Layout：带侧栏的页面 ---------- */

/* radar / cooperation：main 与 aside 为 body 直接子级 */
.site-body:has(> .layout-shell) {
  display: block;
}

.layout-shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* radar 页面：main 在左，aside 在右 */
.layout-shell:has(> main.inner-main) {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
  padding-top: 24px;
  padding-bottom: 0;
}

.layout-shell > main.inner-main {
  padding: 0;
  min-width: 0;
}

.layout-shell > .sidebar {
  padding: 0;
  min-width: 0;
}

/* cooperation：内层双栏，正文在左、侧栏在右 */
.page-layout.sidebar-right {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.page-layout.sidebar-right .content-primary {
  min-width: 0;
}

.page-layout.sidebar-right .sidebar-secondary {
  min-width: 0;
}

/* guide：main-content 在左，aside 在右 */
.page-layout.layout-with-aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

.page-layout.layout-with-aside .main-content {
  min-width: 0;
}

.page-layout.layout-with-aside .sidebar-area {
  min-width: 0;
}

/* ---------- Components：按钮 ---------- */

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 6px;
  line-height: 1.5;
  text-align: center;
  min-height: 44px;
}

.btn-primary {
  background-color: #E8590C;
  color: #FFFFFF;
  border: 2px solid #E8590C;
}

.btn-primary:hover {
  background-color: #D64F08;
  border-color: #D64F08;
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: #E8590C;
  border: 2px solid #E8590C;
}

.btn-secondary:hover {
  background-color: rgba(232, 89, 12, 0.08);
  text-decoration: none;
}

/* ---------- Components：折叠面板 ---------- */

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  margin-bottom: 10px;
}

.faq-item summary {
  padding: 16px 18px;
  font-weight: 700;
  font-size: 16px;
  color: #202227;
  position: relative;
  padding-right: 40px;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #E8590C;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding: 0 18px 16px;
  color: #60656C;
  font-size: 15px;
  margin-bottom: 0;
}

/* ---------- Components：编号步骤 ---------- */

.step-num,
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: #2F6FED;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ---------- Components：分类标签 ---------- */

.category-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 700;
  color: #2F6FED;
  background-color: rgba(47, 111, 237, 0.1);
  border-radius: 4px;
  line-height: 1.4;
}

/* ---------- Components：图片与媒体 ---------- */

figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 6px;
}

.content-media {
  margin: 16px 0;
}

.content-media figcaption,
.content-figure figcaption {
  font-size: 13px;
  color: #60656C;
  padding: 8px 2px 0;
  line-height: 1.6;
}

.content-media-inline {
  max-width: 100%;
  margin: 20px 0;
}

/* ---------- Components：侧栏 ---------- */

.sidebar,
.sidebar-area,
.sidebar-secondary {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
}

.sidebar-inner h2,
.sidebar-area h2,
.sidebar-secondary h2 {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #D8D6D2;
}

.sidebar-links li {
  margin-bottom: 12px;
}

.sidebar-links li a {
  display: block;
  padding: 10px 12px;
  background-color: #F5F4F0;
  border-radius: 4px;
}

.sidebar-links li a:hover {
  background-color: rgba(232, 89, 12, 0.08);
  text-decoration: none;
}

.sidebar-links h3 {
  font-size: 15px;
  margin-bottom: 2px;
}

.sidebar-links p {
  font-size: 13px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.6;
}

.sidebar-guide {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid #D8D6D2;
  font-size: 14px;
}

.sidebar-guide p {
  margin-bottom: 0;
}

.sidebar-note {
  font-size: 13px;
  color: #60656C;
  margin-top: 14px;
  margin-bottom: 0;
  padding-top: 12px;
  border-top: 1px solid #D8D6D2;
}

/* ---------- Components：清单 ---------- */

.checklist li {
  padding: 10px 0;
  border-bottom: 1px solid #F0EFEC;
}

.checklist li:last-child {
  border-bottom: none;
}

.checklist li h3 {
  font-size: 15px;
  margin-bottom: 2px;
}

.checklist li p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- 首页 ---------- */

/* Hero */
.hero-section {
  background-color: #FFFFFF;
  border-bottom: 1px solid #D8D6D2;
}

.hero-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-text h1 {
  font-size: 34px;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-lead {
  font-size: 17px;
  color: #60656C;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-media {
  margin: 0;
}

.hero-media img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 需求走廊 */
.corridor-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 20px 0;
}

.corridor-section h2 {
  margin-bottom: 28px;
}

.corridor-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.corridor-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.corridor-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.corridor-item p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 16px;
  line-height: 1.7;
}

.corridor-item a {
  margin-top: auto;
  font-weight: 700;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.corridor-item a::after {
  content: "→";
  transition: transform 0.2s;
}

.corridor-item a:hover {
  text-decoration: none;
}

.corridor-item a:hover::after {
  transform: translateX(4px);
}

/* 四步工作台 */
.process-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 20px 0;
}

.process-section h2 {
  margin-bottom: 28px;
}

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

.process-step {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
  position: relative;
}

.process-step .step-num {
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.process-step p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.process-more {
  margin-top: 24px;
  text-align: right;
}

.process-more a {
  font-weight: 700;
}

/* 内容地图 */
.sitemap-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 20px 0;
}

.sitemap-section h2 {
  margin-bottom: 28px;
}

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

.sitemap-col {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
}

.sitemap-col h3 {
  font-size: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid #D8D6D2;
  margin-bottom: 12px;
}

.sitemap-col ul li {
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid #F0EFEC;
}

.sitemap-col ul li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.sitemap-col ul li a {
  font-weight: 700;
  font-size: 15px;
  display: block;
  margin-bottom: 2px;
}

.sitemap-col ul li p {
  font-size: 13px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 现象档案预览 */
.preview-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 20px 0;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.preview-text h2 {
  margin-bottom: 16px;
}

.preview-text p {
  color: #60656C;
  font-size: 15px;
}

.preview-text a {
  font-weight: 700;
  display: inline-block;
  margin-top: 4px;
}

.preview-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 6px;
}

/* FAQ 预览 */
.faq-preview-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 20px 0;
}

.faq-preview-section h2 {
  margin-bottom: 24px;
}

.faq-more {
  margin-top: 20px;
}

.faq-more a {
  font-weight: 700;
}

/* ---------- 内页：热点雷达 ---------- */

.service-scope .scope-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.scope-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.scope-item dt {
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 6px;
  color: #2F6FED;
}

.scope-item dd {
  font-size: 14px;
  color: #60656C;
  line-height: 1.7;
}

.signal-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.signal-card {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
  border-top: 4px solid #2F6FED;
}

.signal-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.signal-card p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.signal-card.level-observe {
  border-top-color: #8A8F98;
}

.signal-card.level-attention {
  border-top-color: #2F6FED;
}

.signal-card.level-warning {
  border-top-color: #E8590C;
}

.signal-card.level-action {
  border-top-color: #C92A2A;
}

.deliverable-block {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 16px;
}

.deliverable-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.deliverable-block p {
  font-size: 15px;
  color: #60656C;
  margin-bottom: 0;
}

.analysis-path .path-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.analysis-path .path-steps li {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.analysis-path .path-steps h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.analysis-path .path-steps p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.path-note {
  margin-top: 16px;
  font-size: 15px;
}

.related-links {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.related-links-label {
  font-weight: 700;
  font-size: 14px;
  color: #60656C;
}

.related-links-item {
  font-size: 14px;
  font-weight: 700;
}

/* ---------- 内页：内容共创 ---------- */

.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.scene-card {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
}

.scene-card h3 {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #F0EFEC;
}

.scene-card ul li {
  font-size: 14px;
  color: #60656C;
  padding: 6px 0 6px 20px;
  position: relative;
  line-height: 1.7;
}

.scene-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

.scene-ok ul li::before {
  background-color: #2F6FED;
}

.scene-no ul li::before {
  background-color: #C92A2A;
}

.discipline-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.discipline-steps li {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.discipline-steps li h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.discipline-steps li p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.collaboration-steps .step-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.collaboration-steps .step-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.collaboration-steps .step-item .step-number {
  margin-bottom: 10px;
}

.collaboration-steps .step-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.collaboration-steps .step-item p {
  font-size: 13px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.content-figure {
  margin: 32px 0;
}

.content-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.path-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.path-links a {
  display: inline-block;
  padding: 10px 18px;
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
}

.path-links a:hover {
  border-color: #E8590C;
  text-decoration: none;
}

/* ---------- 内页：现象档案 ---------- */

.problem-context p {
  color: #60656C;
  max-width: 820px;
}

.analysis-method .stage-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 12px;
  display: flex;
  gap: 20px;
  align-items: baseline;
}

.analysis-method .stage-item h3 {
  font-size: 16px;
  min-width: 100px;
  color: #2F6FED;
}

.analysis-method .stage-item p {
  font-size: 15px;
  color: #60656C;
  margin-bottom: 0;
}

.source-table {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  overflow: hidden;
}

.source-row {
  padding: 16px 20px;
  border-bottom: 1px solid #F0EFEC;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
}

.source-row:last-child {
  border-bottom: none;
}

.source-row h3 {
  font-size: 15px;
  margin-bottom: 0;
}

.source-row p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.summary-list {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 8px 20px;
  margin-bottom: 16px;
}

.summary-list li {
  padding: 10px 0 10px 24px;
  position: relative;
  font-size: 15px;
  border-bottom: 1px solid #F0EFEC;
}

.summary-list li:last-child {
  border-bottom: none;
}

.summary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  background-color: #E8590C;
  border-radius: 2px;
}

/* ---------- 内页：使用指南 ---------- */

.identity-group .identity-card {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 16px;
}

.identity-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.identity-card-header h3 {
  font-size: 17px;
  margin-bottom: 0;
}

.identity-card > p {
  font-size: 15px;
  color: #60656C;
}

.entry-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.entry-list li a {
  display: block;
  padding: 8px 12px;
  background-color: #F5F4F0;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
}

.entry-list li a:hover {
  background-color: rgba(232, 89, 12, 0.08);
  text-decoration: none;
}

.reading-sequence .step-list {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 8px 20px;
}

.reading-sequence .step-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid #F0EFEC;
}

.reading-sequence .step-list li:last-child {
  border-bottom: none;
}

.reading-sequence .step-list .step-number {
  margin-top: 4px;
}

.reading-sequence .step-list .step-content h3 {
  font-size: 16px;
  margin-bottom: 2px;
}

.reading-sequence .step-list .step-content p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

.relation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.relation-item {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.relation-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
  color: #2F6FED;
}

.relation-item p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

/* ---------- 内页：合作指引 ---------- */

.content-section .section-intro {
  color: #60656C;
}

.preparation-list {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 8px 20px;
}

.preparation-list li {
  padding: 14px 0 14px 28px;
  position: relative;
  border-bottom: 1px solid #F0EFEC;
}

.preparation-list li:last-child {
  border-bottom: none;
}

.preparation-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 10px;
  border: 2px solid #2F6FED;
  border-radius: 3px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.process-steps li {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.process-steps .step-number {
  margin-bottom: 10px;
}

.process-steps h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.process-steps p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

/* cooperation 页的 process-steps 使用 li 直接子元素 */
.process-steps > li {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 18px;
}

.process-steps > li .step-number {
  margin-bottom: 10px;
}

.process-steps > li h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.process-steps > li p {
  font-size: 14px;
  color: #60656C;
  margin-bottom: 0;
  line-height: 1.7;
}

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

.aside-card {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 16px;
}

.aside-card h2 {
  font-size: 18px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #D8D6D2;
}

.aside-card .checklist li {
  padding: 8px 0;
}

/* ---------- 404 ---------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
}

.error-panel {
  background-color: #FFFFFF;
  border: 1px solid #D8D6D2;
  border-radius: 8px;
  padding: 48px 40px;
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 56px;
  font-weight: 700;
  color: #E8590C;
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-panel h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-lead {
  color: #60656C;
  font-size: 16px;
}

.error-panel p {
  color: #60656C;
  font-size: 14px;
}

.error-action {
  display: inline-block;
  margin-top: 8px;
  padding: 12px 24px;
  background-color: #E8590C;
  color: #FFFFFF;
  border-radius: 6px;
  font-weight: 700;
  min-height: 44px;
  line-height: 1.5;
}

.error-action:hover {
  background-color: #D64F08;
  text-decoration: none;
}

/* ---------- Responsive ---------- */

/* 小屏桌面：1024px 以下调整多栏 */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 16px;
  }

  .corridor-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

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

  .sitemap-columns {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .preview-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 16px;
  }

  .signal-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .collaboration-steps .step-cards {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .relation-grid {
    grid-template-columns: 1fr;
  }

  .layout-shell:has(> main.inner-main) {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .page-layout.sidebar-right {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .page-layout.layout-with-aside {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .scene-grid {
    grid-template-columns: 1fr;
  }

  .entry-list {
    grid-template-columns: 1fr;
  }
}

/* 手机：640px 以下 */
@media (max-width: 640px) {
  .header-inner {
    height: auto;
    min-height: 60px;
    flex-wrap: wrap;
    padding: 8px 16px;
    gap: 8px;
  }

  .brand-tag {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 8px 0;
    border-top: 1px solid #D8D6D2;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 8px;
    font-size: 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .inner-main {
    padding: 16px 16px 0;
  }

  .breadcrumb {
    font-size: 13px;
    margin-bottom: 12px;
    padding-bottom: 10px;
  }

  .page-header {
    margin-bottom: 24px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-description {
    font-size: 15px;
  }

  .hero-section {
    padding: 32px 16px;
  }

  .hero-text h1 {
    font-size: 26px;
  }

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

  .btn-primary,
  .btn-secondary {
    text-align: center;
    width: 100%;
  }

  .corridor-section,
  .process-section,
  .sitemap-section,
  .preview-section,
  .faq-preview-section {
    padding: 40px 16px 0;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .process-more {
    text-align: left;
  }

  .signal-cards {
    grid-template-columns: 1fr;
  }

  .discipline-steps {
    grid-template-columns: 1fr;
  }

  .collaboration-steps .step-cards {
    grid-template-columns: 1fr;
  }

  .analysis-path .path-steps {
    grid-template-columns: 1fr;
  }

  .scope-list {
    grid-template-columns: 1fr;
  }

  .source-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .analysis-method .stage-item {
    flex-direction: column;
    gap: 4px;
  }

  .analysis-method .stage-item h3 {
    min-width: 0;
  }

  .layout-shell {
    padding: 0 16px;
  }

  .layout-shell:has(> main.inner-main) {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-top: 16px;
  }

  .layout-shell > .sidebar {
    width: 100%;
  }

  .page-layout.sidebar-right {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .page-layout.layout-with-aside {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .sidebar-secondary,
  .sidebar-area {
    width: 100%;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .path-links {
    flex-direction: column;
    align-items: stretch;
  }

  .path-links a {
    text-align: center;
  }

  .error-main {
    padding: 48px 16px;
  }

  .error-panel {
    padding: 32px 20px;
  }

  .error-code {
    font-size: 40px;
  }

  .identity-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .entry-list {
    grid-template-columns: 1fr;
  }
}

/* 超小屏兜底：确保 390px 无横向溢出 */
@media (max-width: 390px) {
  .header-inner {
    padding: 8px 12px;
  }

  .brand-name {
    font-size: 20px;
  }

  .site-nav .nav-list li a {
    font-size: 15px;
  }

  .inner-main {
    padding: 12px 12px 0;
  }

  .hero-section,
  .corridor-section,
  .process-section,
  .sitemap-section,
  .preview-section,
  .faq-preview-section {
    padding-left: 12px;
    padding-right: 12px;
  }

  .layout-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

  .footer-inner {
    padding-left: 12px;
    padding-right: 12px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 10px 16px;
    font-size: 14px;
  }

  .faq-item summary {
    padding: 14px 36px 14px 14px;
    font-size: 15px;
  }

  .faq-item p {
    padding: 0 14px 14px;
    font-size: 14px;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}