/* ==========================================================================
   囧次元 · eioox.cn 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */

:root {
  --bg-page: #f6f8f8;
  --bg-surface: #ffffff;
  --text-main: #24302f;
  --text-sub: #5c6b69;
  --accent: #14857a;
  --accent-soft: #2fa79a;
  --line: #e2e8e7;
  --tag-bg: #e8f3f1;
  --radius: 6px;
  --radius-sm: 4px;
  --wrap: 1160px;
  --wrap-narrow: 900px;
  --gap: 24px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-main);
}

p {
  margin: 0 0 14px;
}

p:last-child {
  margin-bottom: 0;
}

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

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

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

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

figure {
  margin: 0;
}

figcaption {
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.6;
}

button {
  font: inherit;
  color: inherit;
}

strong {
  font-weight: 600;
  color: var(--text-main);
}

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架：页头 / 主容器 / 页脚
   -------------------------------------------------------------------------- */

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

/* --- 页头与主导航 --- */

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

.site-header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}

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

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

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: var(--accent);
  box-shadow: inset 0 0 0 6px var(--bg-surface), inset 0 0 0 8px var(--accent-soft);
}

.brand-name {
  font-size: 18px;
  font-weight: 600;
}

.site-nav {
  margin-left: auto;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
  background-color: var(--tag-bg);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--accent);
  background-color: var(--tag-bg);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-icon {
  width: 16px;
  height: 2px;
  background-color: var(--text-main);
  box-shadow: 0 -5px 0 var(--text-main), 0 5px 0 var(--text-main);
}

.nav-toggle-text {
  font-size: 14px;
  color: var(--text-sub);
}

/* --- 主内容容器 --- */

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

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px 24px 64px;
}

/* --- 页脚 --- */

.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--line);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr);
  gap: 32px 40px;
}

.footer-about {
  min-width: 0;
}

.footer-brand {
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.footer-text {
  margin: 0;
  max-width: 340px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px 24px;
}

.footer-group {
  min-width: 0;
}

.footer-group-title {
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-list a {
  display: inline-block;
  padding: 2px 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
}

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

.footer-note {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}

.footer-note p {
  margin: 0;
  max-width: 720px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.7;
}

.footer-copy {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-sub);
}

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

/* --- 顶部事实条 --- */

.fact-bar,
.site-factbar,
.top-fact-bar {
  background-color: var(--tag-bg);
  border-bottom: 1px solid var(--line);
}

.fact-bar-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px;
}

.fact-bar-text,
.site-factbar p,
.top-fact-text {
  margin: 0;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.6;
}

.site-factbar p,
.top-fact-bar p {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px;
}

/* --- 跳转链接 --- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 60;
  padding: 10px 16px;
  background-color: var(--accent);
  color: #ffffff;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

/* --- 按钮与文字链接 --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--accent-soft);
  border-color: var(--accent-soft);
  color: #ffffff;
  text-decoration: none;
}

.btn-ghost {
  background-color: var(--bg-surface);
  border-color: var(--line);
  color: var(--text-main);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.text-link {
  display: inline-block;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent-soft);
  border-bottom-color: currentColor;
  text-decoration: none;
}

/* --- 区块标题体系 --- */

.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 24px;
}

.section-index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.section-title {
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 600;
}

.section-desc,
.section-intro {
  max-width: 720px;
  margin: 0;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.section-intro {
  margin-bottom: 20px;
}

.section-more {
  margin: 20px 0 0;
}

.subsection-title {
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 600;
}

/* --- 面包屑与页面标题区 --- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--text-sub);
}

.breadcrumb a {
  color: var(--text-sub);
  text-decoration: none;
}

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

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

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

.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  margin-bottom: 12px;
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
}

.page-description {
  max-width: 720px;
  margin: 0;
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.75;
}

/* --- 图片容器 --- */

.hero-figure,
.section-figure,
.note-figure,
.feedback-media,
.section-media,
.faq-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-surface);
}

.hero-figure img,
.section-figure img,
.note-figure img,
.feedback-media img,
.section-media img,
.faq-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background-color: var(--tag-bg);
}

.hero-caption,
.section-figure figcaption,
.note-caption,
.feedback-media figcaption,
.section-media figcaption,
.faq-figure-caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

/* --- 折叠问答 --- */

.faq-list,
.faq-groups {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-group-title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
  font-weight: 600;
}

.faq-group .faq-list {
  gap: 8px;
}

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

.faq-group .faq-item {
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background-color: transparent;
}

.faq-group .faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  min-height: 44px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "+";
  flex: 0 0 auto;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  color: var(--accent);
}

.faq-item[open] > .faq-question::before {
  content: "–";
}

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

.faq-answer {
  padding: 0 18px 16px 46px;
}

.faq-answer p {
  margin: 0 0 10px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* --- 标签与归档 --- */

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

.tag-chip {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--tag-bg);
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}

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

.archive-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
}

.archive-item a {
  font-size: 15px;
  font-weight: 600;
}

.archive-note {
  color: var(--text-sub);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* --- 首屏主题区 --- */

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

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.hero-copy {
  min-width: 0;
  padding-top: 8px;
}

.hero-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.hero-title {
  margin-bottom: 16px;
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 24px;
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.8;
}

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

.hero-visual {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.hero-summary-title {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 600;
}

.hero-summary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.hero-summary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--accent-soft);
}

/* --- 服务方向索引 --- */

.direction-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.direction-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 16px 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

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

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

.direction-name {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.direction-fields {
  margin: 0;
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 6px 14px;
}

.direction-fields dt {
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.7;
}

.direction-fields dd {
  margin: 0;
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.7;
}

.direction-link {
  align-self: center;
  white-space: nowrap;
  font-size: 15px;
  font-weight: 600;
}

/* --- 合作流程阶段预览 --- */

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-card {
  min-width: 0;
  padding: 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.process-name {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.process-task {
  margin-bottom: 14px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.process-sub {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.process-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.process-list:last-child {
  margin-bottom: 0;
}

.process-list li {
  position: relative;
  padding-left: 14px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.7;
}

.process-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-soft);
}

/* --- 角色入口区 --- */

.roles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.role-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.role-name {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.role-desc {
  margin-bottom: 14px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.role-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.role-links .text-link {
  font-size: 14px;
}

/* --- 交付范围与验收口径摘要 --- */

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.scope-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-heading {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
  font-weight: 600;
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scope-list li {
  position: relative;
  padding-left: 16px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--tag-bg);
  box-shadow: inset 0 0 0 1px var(--accent-soft);
}

/* --- 站内栏目索引 --- */

.column-index {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.column-index-item {
  min-width: 0;
}

.column-index-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  padding: 14px 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

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

.column-index-desc {
  color: var(--text-sub);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   pages · 服务方向
   -------------------------------------------------------------------------- */

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

.section-direction-index .direction-row {
  display: block;
  padding: 22px 0;
}

.direction-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.direction-head .direction-no {
  padding-top: 0;
}

.section-direction-index .direction-fields {
  grid-template-columns: 96px minmax(0, 1fr);
  margin-bottom: 12px;
}

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

.note-block {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.note-title {
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 600;
}

.note-figure {
  margin-bottom: 14px;
}

.note-figure img {
  aspect-ratio: 4 / 3;
}

.note-block p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.related-card {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-card-title {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.related-reason {
  margin-bottom: 14px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.related-link {
  font-size: 15px;
  font-weight: 600;
}

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

.tag-legend,
.archive-nav {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* --------------------------------------------------------------------------
   pages · 合作流程
   -------------------------------------------------------------------------- */

.process-overview-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-step-card {
  min-width: 0;
  padding: 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-step-card .step-index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.process-step-card .step-name {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.process-step-card .step-task {
  margin: 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.process-detail .process-stage {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.process-detail .process-stage:first-of-type {
  border-top: none;
  padding-top: 0;
}

.stage-head {
  margin-bottom: 18px;
}

.stage-head .stage-index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.stage-head .stage-name {
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 600;
}

.stage-head .stage-summary {
  max-width: 720px;
  margin: 0;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.stage-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.stage-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-column-client {
  background-color: var(--tag-bg);
}

.stage-column-title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  font-weight: 600;
}

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stage-list li {
  position: relative;
  padding-left: 16px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

.stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background-color: var(--accent-soft);
}

.feedback-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 24px;
  align-items: start;
}

.feedback-media {
  min-width: 0;
}

.feedback-media img {
  aspect-ratio: 4 / 3;
}

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

.feedback-body p {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0;
}

.feedback-list li {
  position: relative;
  padding-left: 16px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

.feedback-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 2px;
  background-color: var(--accent-soft);
}

.transition-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.transition-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.transition-item .transition-index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.transition-item .transition-name {
  margin-bottom: 6px;
  font-size: 18px;
  font-weight: 600;
}

.transition-item .transition-text {
  margin: 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

.transition-note {
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

.next-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.next-card {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-card-title {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.next-card-text {
  margin-bottom: 14px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.next-card-link {
  font-size: 15px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 交付范围
   -------------------------------------------------------------------------- */

.delivery-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

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

.delivery-name {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 600;
}

.delivery-fields {
  margin: 0;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 14px;
}

.delivery-fields dt {
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.7;
}

.delivery-fields dd {
  margin: 0;
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.7;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.scope-col {
  min-width: 0;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-col h3 {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
  font-weight: 600;
}

.scope-col-exclude {
  background-color: var(--tag-bg);
}

.deviation-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.deviation-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.deviation-item h3 {
  margin-bottom: 6px;
  font-size: 18px;
  font-weight: 600;
}

.deviation-item p {
  margin: 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

.next-step-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.next-step-item {
  min-width: 0;
}

.next-step-item a {
  display: block;
  min-height: 44px;
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.next-step-item a:hover,
.next-step-item a:focus-visible {
  border-color: var(--accent-soft);
  background-color: var(--tag-bg);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 常见问题
   -------------------------------------------------------------------------- */

.topic-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-tag {
  display: inline-block;
  min-height: 44px;
  padding: 10px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

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

.faq-media-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 24px;
  align-items: start;
}

.faq-reading-order {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: reading;
}

.faq-reading-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.faq-reading-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.faq-reading-text {
  margin: 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.75;
}

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

.feedback-text {
  max-width: 720px;
  margin-bottom: 16px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.feedback-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.feedback-link-item a {
  font-size: 15px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: var(--wrap-narrow);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-hero-inner {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.error-hero-inner h1 {
  margin-bottom: 12px;
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
}

.error-lead {
  max-width: 720px;
  margin-bottom: 20px;
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.75;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 22px;
  background-color: var(--accent);
  border-radius: var(--radius);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

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

.error-guide h2 {
  margin-bottom: 16px;
  font-size: 22px;
  font-weight: 600;
}

.error-guide-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.error-guide-list li {
  min-width: 0;
}

.error-guide-list a {
  display: block;
  min-height: 44px;
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.error-guide-list a:hover,
.error-guide-list a:focus-visible {
  border-color: var(--accent-soft);
  background-color: var(--tag-bg);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 900px 断点
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {

  .site-header-inner {
    flex-wrap: wrap;
    padding: 10px 20px;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    flex: 1 0 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-top: 8px;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    display: block;
    padding: 12px 14px;
    min-height: 44px;
  }

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

  .hero-copy {
    padding-top: 0;
  }

  .hero-title {
    font-size: 28px;
  }

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

  .roles-grid,
  .related-grid,
  .direction-notes-layout,
  .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .feedback-layout,
  .faq-media-layout {
    grid-template-columns: minmax(0, 1fr);
  }

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

/* --------------------------------------------------------------------------
   responsive · 600px 断点
   -------------------------------------------------------------------------- */

@media (max-width: 600px) {

  .site-header-inner,
  .fact-bar-inner,
  .site-factbar p,
  .top-fact-bar p,
  .footer-inner,
  .home-main,
  .inner-main,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-section {
    padding: 24px 0;
  }

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

  .section {
    padding: 28px 0;
  }

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

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

  .page-header {
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

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

  .direction-no {
    padding-top: 0;
  }

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

  .direction-fields dt,
  .delivery-fields dt {
    margin-top: 6px;
    font-weight: 600;
  }

  .direction-link {
    justify-self: start;
  }

  .process-grid,
  .process-overview-grid,
  .roles-grid,
  .related-grid,
  .direction-notes-layout,
  .next-grid,
  .scope-columns,
  .scope-grid,
  .stage-columns,
  .archive-layout,
  .next-step-list,
  .error-guide-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .footer-note {
    flex-direction: column;
  }

  .faq-answer {
    padding-left: 18px;
  }

  .faq-reading-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .topic-tag-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .topic-tag {
    flex: 0 0 auto;
  }

  .feedback-panel {
    padding: 18px;
  }
}

/* --------------------------------------------------------------------------
   动效偏好
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}