/* ==========================================================================
   囧次元 · 全站样式表
   结构分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base
   ========================================================================== */

:root {
  --c-text: #2b2f33;
  --c-text-soft: #5c646b;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f7f8;
  --c-line: #dfe4e7;
  --c-line-strong: #c7cfd4;
  --c-accent: #1f6f8b;
  --c-accent-deep: #175a72;
  --c-support: #2f8f6b;
  --c-warn: #8a5a1f;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --shell: 1200px;
  --content: 760px;
  --radius: 6px;
  --shadow-card: 0 1px 2px rgba(43, 47, 51, 0.06);
}

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

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

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
}

p {
  margin: 0;
}

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

dl,
dt,
dd {
  margin: 0;
}

a {
  color: var(--c-accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--c-accent-deep);
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
select:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

figure {
  margin: 0;
}

figcaption {
  color: var(--c-text-soft);
  font-size: 14px;
}

strong {
  font-weight: 600;
}

/* 站点基础文本容器（跨页统一） */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

/* ==========================================================================
   layout
   ========================================================================== */

/* --- 页头骨架 --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-text);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand:hover,
.brand:focus-visible {
  color: var(--c-text);
  text-decoration: none;
}

.brand-mark {
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: 0;
}

.brand-slogan {
  font-size: 13px;
  color: var(--c-text-soft);
  padding-left: 10px;
  border-left: 1px solid var(--c-line);
  line-height: 1.4;
}

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

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--c-text);
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-item > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--c-text);
  font-size: 15px;
  border-bottom: 2px solid transparent;
}

.nav-item > a:hover,
.nav-item > a:focus-visible {
  color: var(--c-accent);
  text-decoration: none;
}

.nav-item.is-current > a {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
  font-weight: 600;
}

/* --- 主内容骨架 --- */

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

.home-main {
  display: block;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 24px 24px 56px;
}

/* --- 页脚骨架 --- */

.site-footer {
  border-top: 1px solid var(--c-line);
  background: var(--c-bg-soft);
  font-size: 14px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 240px;
}

.footer-name {
  font-weight: 600;
  color: var(--c-text);
}

.footer-desc {
  color: var(--c-text-soft);
  font-size: 13px;
}

.footer-nav {
  flex: 1 1 auto;
}

.footer-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.footer-list a {
  color: var(--c-text-soft);
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--c-accent);
}

.footer-meta {
  text-align: right;
  color: var(--c-text-soft);
  font-size: 13px;
}

.footer-note {
  margin-bottom: 2px;
}

.footer-copy {
  color: var(--c-text-soft);
}

/* --- 内页三栏布局 --- */

.page-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 200px;
  gap: 40px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 220px minmax(0, 1fr) 200px;
}

.page-content,
.layout-content {
  min-width: 0;
}

/* 左右侧栏统一外观 */
.page-aside,
.layout-aside,
.layout-side {
  position: sticky;
  top: 88px;
  font-size: 14px;
}

.aside-title,
.side-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-soft);
  text-transform: none;
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.aside-list,
.side-list,
.catalog-list,
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-item a,
.catalog-item a,
.toc-item a,
.side-list a {
  display: block;
  padding: 7px 10px;
  color: var(--c-text-soft);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  line-height: 1.5;
}

.aside-item a:hover,
.catalog-item a:hover,
.toc-item a:hover,
.side-list a:hover,
.aside-item a:focus-visible,
.catalog-item a:focus-visible,
.toc-item a:focus-visible,
.side-list a:focus-visible {
  color: var(--c-accent);
  background: var(--c-bg-soft);
  text-decoration: none;
}

.aside-item.is-current a,
.catalog-item a.is-current {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: var(--c-bg-soft);
  font-weight: 600;
}

.aside-note,
.side-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  color: var(--c-text-soft);
  font-size: 13px;
  line-height: 1.7;
}

/* --- 面包屑与页标题区 --- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--c-text-soft);
  margin-bottom: 16px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-accent);
}

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

.breadcrumb-current {
  color: var(--c-text);
}

.page-header {
  max-width: var(--content);
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--c-line);
}

.page-title {
  font-size: 32px;
  line-height: 1.35;
  margin-bottom: 12px;
}

.page-description {
  color: var(--c-text-soft);
  font-size: 15px;
}

/* ==========================================================================
   components
   ========================================================================== */

/* --- 顶部事实条 --- */

.fact-bar {
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-line);
  color: var(--c-text-soft);
  font-size: 13px;
  text-align: center;
  padding: 8px 24px;
  line-height: 1.6;
}

/* --- 按钮 --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background: var(--c-accent);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-accent-deep);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  color: var(--c-accent);
  border-color: var(--c-line-strong);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent-deep);
  background: var(--c-bg-soft);
}

/* --- 通用 section 头部 --- */

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--c-line);
}

.section:last-child {
  border-bottom: 0;
}

.section-head {
  max-width: var(--content);
  margin-bottom: 28px;
}

.section-title {
  font-size: 24px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-desc,
.section-intro {
  color: var(--c-text-soft);
  font-size: 15px;
}

.section-intro {
  max-width: var(--content);
  margin-bottom: 24px;
}

.section-foot {
  margin-top: 22px;
  font-size: 15px;
}

.section-foot a {
  font-weight: 600;
}

.section-footnote {
  margin-top: 18px;
  color: var(--c-text-soft);
  font-size: 14px;
}

.content-section {
  margin-bottom: 56px;
}

.content-section:last-child {
  margin-bottom: 0;
}

/* --- 图片容器 --- */

.section-figure,
.page-media,
.hero-media {
  margin: 0 0 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-bg-soft);
}

.section-figure img,
.page-media img,
.hero-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.section-figure figcaption,
.page-media figcaption,
.hero-media figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--c-line);
  background: var(--c-bg);
  line-height: 1.6;
}

.page-media {
  margin-bottom: 32px;
}

/* --- 折叠问答 --- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: var(--content);
}

.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
}

.faq-item[open] {
  border-color: var(--c-line-strong);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  cursor: pointer;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-accent);
  line-height: 1;
}

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

.faq-question:hover {
  color: var(--c-accent);
}

.faq-answer {
  padding: 0 16px 16px;
  border-top: 1px solid var(--c-line);
  color: var(--c-text-soft);
  font-size: 15px;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* --- 边界条件列表（跨页复用） --- */

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--content);
}

.boundary-item {
  padding: 14px 16px;
  background: var(--c-bg-soft);
  border-left: 3px solid var(--c-warn);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.boundary-title,
.boundary-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.boundary-text,
.boundary-desc {
  color: var(--c-text-soft);
  font-size: 15px;
}

/* --- 下一步入口 --- */

.next-actions,
.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius);
  color: var(--c-accent);
  font-weight: 600;
  font-size: 15px;
}

.next-link:hover,
.next-link:focus-visible {
  border-color: var(--c-accent);
  background: var(--c-bg-soft);
  text-decoration: none;
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

/* --- 首屏 --- */

.hero-section {
  border-bottom: 1px solid var(--c-line);
  padding: 48px 0 56px;
}

.hero-grid {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 48px;
  align-items: start;
}

.hero-primary {
  min-width: 0;
}

.hero-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--c-accent);
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 3px 10px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 32px;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-lead {
  max-width: 620px;
  color: var(--c-text-soft);
  font-size: 16px;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.hero-media {
  margin-bottom: 0;
}

/* --- 首屏侧栏 --- */

.hero-side {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 22px 20px;
}

.hero-side-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.hero-side-desc {
  color: var(--c-text-soft);
  font-size: 14px;
  margin-bottom: 16px;
}

.quick-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-top: 1px solid var(--c-line);
  padding-top: 10px;
}

.quick-item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 8px 0;
  color: var(--c-text);
  font-size: 15px;
  border-bottom: 1px solid var(--c-line);
}

.quick-item:last-child a {
  border-bottom: 0;
}

.quick-item a:hover,
.quick-item a:focus-visible {
  color: var(--c-accent);
  text-decoration: none;
}

.quick-no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
}

.quick-name {
  flex: 1 1 auto;
}

.hero-side-help {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  color: var(--c-text-soft);
}

/* --- 首页各 section 容器 --- */

.directions-section,
.process-section,
.delivery-section,
.scene-section,
.faq-section,
.index-section {
  padding-left: 0;
  padding-right: 0;
}

.directions-section > *,
.process-section > *,
.delivery-section > *,
.scene-section > *,
.faq-section > *,
.index-section > * {
  max-width: var(--shell);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- 服务方向索引总览 --- */

.direction-index {
  border-top: 1px solid var(--c-line);
}

.direction-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 140px;
  gap: 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
}

.direction-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-accent);
  padding-top: 3px;
}

.direction-body {
  min-width: 0;
}

.direction-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.direction-fit,
.direction-scope {
  font-size: 15px;
  color: var(--c-text-soft);
}

.direction-fit + .direction-scope {
  margin-top: 4px;
}

.field-label {
  display: inline-block;
  min-width: 68px;
  color: var(--c-text);
  font-weight: 600;
}

.direction-link {
  align-self: center;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.direction-link:hover,
.direction-link:focus-visible {
  border-color: var(--c-accent);
  background: var(--c-bg-soft);
  text-decoration: none;
}

/* --- 合作流程四阶段预览 --- */

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

.stage-card {
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 18px 18px 20px;
  background: var(--c-bg);
  box-shadow: var(--shadow-card);
}

.stage-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
  margin-bottom: 6px;
}

.stage-name {
  font-size: 17px;
  margin-bottom: 12px;
}

.stage-meta {
  font-size: 14px;
  border-top: 1px solid var(--c-line);
  padding-top: 10px;
}

.stage-meta dt {
  color: var(--c-text-soft);
  font-size: 13px;
}

.stage-meta dd {
  color: var(--c-text);
  margin-bottom: 8px;
  line-height: 1.6;
}

.stage-meta dd:last-child {
  margin-bottom: 0;
}

/* --- 交付范围与验收标准摘要 --- */

.delivery-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.delivery-col {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  background: var(--c-bg-soft);
  min-width: 0;
}

.delivery-col-title {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

.delivery-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.delivery-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text-soft);
  line-height: 1.7;
}

.delivery-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--c-support);
  border-radius: 50%;
}

/* --- 场景图组 --- */

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

.scene-card {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-bg);
  display: flex;
  flex-direction: column;
}

.scene-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.scene-card figcaption {
  padding: 16px 18px 20px;
  border-top: 1px solid var(--c-line);
}

.scene-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.scene-card figcaption p {
  color: var(--c-text-soft);
  font-size: 15px;
}

/* --- 站内栏目索引 --- */

.column-index {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.column-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 16px 16px 18px;
  background: var(--c-bg);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.column-item:hover {
  border-color: var(--c-line-strong);
}

.column-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
}

.column-name {
  font-size: 16px;
}

.column-name a {
  color: var(--c-text);
}

.column-name a:hover,
.column-name a:focus-visible {
  color: var(--c-accent);
  text-decoration: none;
}

.column-desc {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.65;
}

/* ==========================================================================
   pages · 服务方向页
   ========================================================================== */

.section-direction-list {
  margin-bottom: 56px;
}

.direction-table {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.direction-table .direction-row {
  display: grid;
  grid-template-columns: 56px minmax(140px, 0.9fr) minmax(0, 1.2fr) minmax(0, 1.4fr);
  gap: 0;
  padding: 0;
  border-bottom: 1px solid var(--c-line);
}

.direction-table .direction-row:last-child {
  border-bottom: 0;
}

.direction-row-head {
  background: var(--c-bg-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-soft);
}

.direction-cell {
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  border-right: 1px solid var(--c-line);
  min-width: 0;
}

.direction-cell:last-child {
  border-right: 0;
}

.direction-cell-no {
  font-family: var(--font-mono);
  color: var(--c-accent);
}

.direction-cell-name {
  font-weight: 600;
  color: var(--c-text);
  font-size: 15px;
}

.direction-cell-fit,
.direction-cell-scope {
  color: var(--c-text-soft);
}

.section-direction-scope {
  margin-bottom: 56px;
}

.scope-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line);
  max-width: var(--content);
}

.scope-item:last-child {
  border-bottom: 0;
}

.scope-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.scope-text {
  color: var(--c-text-soft);
  font-size: 15px;
  margin-bottom: 10px;
}

.scope-points {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scope-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.7;
}

.scope-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--c-support);
  border-radius: 50%;
}

.section-direction-boundary {
  margin-bottom: 56px;
}

.section-direction-next .next-actions {
  margin-top: 6px;
}

/* ==========================================================================
   pages · 合作流程页
   ========================================================================== */

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--c-line);
  margin-bottom: 8px;
}

.stage-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
}

.stage-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-accent);
  padding-top: 2px;
}

.stage-item .stage-name {
  font-size: 18px;
  margin-bottom: 6px;
}

.stage-desc {
  color: var(--c-text-soft);
  font-size: 15px;
  max-width: var(--content);
}

.compare-table {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare-table .compare-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--c-line);
}

.compare-table .compare-row:last-child {
  border-bottom: 0;
}

.compare-table .compare-head {
  background: var(--c-bg-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-soft);
}

.compare-cell {
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  border-right: 1px solid var(--c-line);
  min-width: 0;
}

.compare-cell:last-child {
  border-right: 0;
}

.compare-head .compare-cell {
  color: var(--c-text-soft);
}

.checkpoint-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checkpoint-item {
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-support);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--c-bg-soft);
}

.checkpoint-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.checkpoint-desc {
  color: var(--c-text-soft);
  font-size: 15px;
}

.next-step {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg-soft);
}

.next-step-text {
  color: var(--c-text-soft);
  font-size: 15px;
  flex: 1 1 320px;
  min-width: 0;
}

.next-step-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  background: var(--c-accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}

.next-step-link:hover,
.next-step-link:focus-visible {
  background: var(--c-accent-deep);
  color: #ffffff;
  text-decoration: none;
}

/* ==========================================================================
   pages · 交付范围页
   ========================================================================== */

.compare-row {
  border-bottom: 1px solid var(--c-line);
  padding: 20px 0;
}

.compare-row:last-child {
  border-bottom: 0;
}

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

.compare-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 16px;
  font-size: 15px;
}

.compare-fields dt {
  color: var(--c-text-soft);
  font-size: 14px;
}

.compare-fields dd {
  color: var(--c-text);
  line-height: 1.7;
  min-width: 0;
}

.coop-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.coop-item {
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
}

.coop-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.coop-desc {
  color: var(--c-text-soft);
  font-size: 15px;
}

.section-next .next-links {
  margin-top: 4px;
}

/* ==========================================================================
   pages · 常见问题页
   ========================================================================== */

.faq-group {
  margin-bottom: 48px;
}

.faq-group:last-of-type {
  margin-bottom: 32px;
}

.faq-group .faq-item {
  max-width: var(--content);
}

.faq-group .faq-item + .faq-item {
  margin-top: 10px;
}

.faq-next {
  max-width: var(--content);
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg-soft);
  margin-bottom: 32px;
}

.faq-next .section-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.faq-next p {
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.9;
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  display: flex;
  justify-content: center;
  padding: 64px 24px 80px;
}

.error-inner {
  width: 100%;
  max-width: 640px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 40px;
  color: var(--c-line-strong);
  line-height: 1;
  margin-bottom: 12px;
}

.error-main h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-lead {
  color: var(--c-text-soft);
  font-size: 16px;
  margin-bottom: 32px;
}

.error-section {
  margin-bottom: 32px;
}

.error-section h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.error-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.error-list li {
  position: relative;
  padding-left: 18px;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.7;
}

.error-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  background: var(--c-accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 15px;
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background: var(--c-accent-deep);
  color: #ffffff;
  text-decoration: none;
}

.error-nav {
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
}

.error-nav h2 {
  font-size: 15px;
  color: var(--c-text-soft);
  margin-bottom: 12px;
}

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

.error-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1200px) {
  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr) 180px;
    gap: 28px;
  }

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

@media (max-width: 900px) {
  :root {
    --shell: 100%;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

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

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

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

  /* 内页：右侧小目录折叠为底部返回入口，仅保留左栏 + 正文 */
  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .aside-toc,
  .aside-right {
    grid-column: 1 / -1;
    position: static;
    padding-top: 20px;
    border-top: 1px solid var(--c-line);
  }

  .aside-toc .toc-list,
  .aside-right .aside-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px 12px;
  }

  .aside-toc .toc-item a,
  .aside-right .aside-item a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 6px 4px;
  }

  .aside-toc .toc-item a:hover,
  .aside-right .aside-item a:hover {
    background: transparent;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    min-height: 56px;
    padding: 0 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    justify-content: flex-start;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    display: none;
    padding: 8px 0 12px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-item > a {
    border-bottom: 1px solid var(--c-line);
    border-left: 2px solid transparent;
    padding: 0 12px;
    justify-content: flex-start;
  }

  .nav-item:last-child > a {
    border-bottom: 0;
  }

  .nav-item.is-current > a {
    border-bottom-color: var(--c-line);
    border-left-color: var(--c-accent);
  }

  .fact-bar {
    padding: 8px 16px;
    text-align: left;
  }

  .hero-section {
    padding: 32px 0 40px;
  }

  .hero-grid {
    padding: 0 16px;
  }

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

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

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 20px;
  }

  .directions-section > *,
  .process-section > *,
  .delivery-section > *,
  .scene-section > *,
  .faq-section > *,
  .index-section > * {
    padding-left: 16px;
    padding-right: 16px;
  }

  .inner-main {
    padding: 20px 16px 40px;
  }

  /* 内页：单列阅读，左栏折叠为顶部锚点条 */
  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .page-aside,
  .layout-aside,
  .layout-side {
    position: static;
  }

  .aside-left,
  .aside-nav,
  .aside-catalog {
    padding-bottom: 16px;
    border-bottom: 1px solid var(--c-line);
  }

  .aside-left .aside-list,
  .aside-nav .aside-list,
  .aside-catalog .catalog-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px 10px;
  }

  .aside-left .aside-item a,
  .aside-nav .aside-item a,
  .aside-catalog .catalog-item a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 6px 4px;
  }

  .aside-left .aside-item a:hover,
  .aside-nav .aside-item a:hover,
  .aside-catalog .catalog-item a:hover {
    background: transparent;
  }

  .aside-left .aside-item.is-current a,
  .aside-catalog .catalog-item a.is-current {
    background: transparent;
    border-bottom-color: var(--c-accent);
  }

  /* 首页：服务方向索引行改为单列堆叠 */
  .direction-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .direction-index .direction-link {
    grid-column: 2 / 3;
    justify-self: start;
  }

  .field-label {
    display: block;
    min-width: 0;
  }

  /* 首页：阶段卡与场景图单列 */
  .stage-strip,
  .scene-grid,
  .column-index,
  .delivery-summary {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 服务方向对照表：小屏转为逐项堆叠 */
  .direction-table .direction-row {
    grid-template-columns: minmax(0, 1fr);
    padding: 14px 0;
  }

  .direction-table .direction-row-head {
    display: none;
  }

  .direction-cell {
    border-right: 0;
    padding: 4px 16px;
  }

  .direction-cell-no {
    padding-top: 12px;
  }

  .direction-cell-scope {
    padding-bottom: 14px;
  }

  /* 流程对照表：小屏逐行堆叠 */
  .compare-table .compare-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .compare-table .compare-head {
    display: none;
  }

  .compare-cell {
    border-right: 0;
    padding: 4px 16px;
  }

  .compare-table .compare-cell:first-child {
    padding-top: 14px;
    font-weight: 600;
    color: var(--c-text);
  }

  .compare-table .compare-cell:last-child {
    padding-bottom: 14px;
  }

  .stage-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

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

  .compare-fields dt {
    margin-top: 8px;
  }

  .next-step {
    flex-direction: column;
    align-items: flex-start;
  }

  .next-step-link {
    width: 100%;
    justify-content: center;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 20px 16px;
  }

  .footer-brand {
    flex-direction: column;
    gap: 4px;
    min-width: 0;
  }

  .footer-meta {
    text-align: left;
  }

  .error-main {
    padding: 40px 16px 56px;
  }

  .error-code {
    font-size: 32px;
  }

  .error-main h1 {
    font-size: 22px;
  }
}