:root {
  --bg-page: #F4F7F8;
  --bg-surface: #FFFFFF;
  --bg-note: #FBF4E6;
  --ink-main: #0E1F26;
  --ink-sub: #5A6E75;
  --brand: #1F7A63;
  --brand-soft: #E4F1EC;
  --accent: #1D66B0;
  --accent-soft: #E6EFF8;
  --line: #DCE6E9;
  --line-strong: #C3D3D8;
  --radius: 6px;
  --radius-sm: 4px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, Menlo, "Courier New", monospace;
  --shadow-row: 0 1px 2px rgba(14, 31, 38, 0.05);
}

/* ==========================================================================
   base —— 全站重置与基础排版
   ========================================================================== */

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-page);
  color: var(--ink-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0 0 1em;
}

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

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

dl,
dt,
dd {
  margin: 0;
}

a {
  color: var(--brand);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  color: var(--ink-sub);
  font-size: 13px;
  line-height: 1.7;
}

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

strong {
  font-weight: 600;
}

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

/* ==========================================================================
   layout —— 容器、页面骨架、页头、页脚
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

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

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

.header-inner {
  width: 100%;
  max-width: 1120px;
  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(--ink-main);
  text-decoration: none;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: var(--radius-sm);
  background-color: var(--brand);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}

.brand-tagline {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-main);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--ink-main);
}

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--ink-main);
  font-size: 15px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--brand);
  border-bottom-color: var(--brand);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--brand);
  border-bottom-color: var(--brand);
  font-weight: 600;
}

.site-main {
  display: block;
  flex: 1 0 auto;
}

.site-footer {
  margin-top: 56px;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 32px;
}

.footer-title {
  margin-bottom: 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-main);
}

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

.footer-list a {
  color: var(--ink-sub);
  font-size: 14px;
  text-decoration: none;
}

.footer-list a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.footer-list-plain li {
  color: var(--ink-sub);
  font-size: 14px;
}

.footer-group-about p {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.75;
}

.footer-copy {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-sub);
}

/* 内页主内容与侧栏布局 */

.inner-main {
  min-width: 0;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 840px) 240px;
  gap: 40px;
  align-items: start;
  padding-top: 28px;
  padding-bottom: 8px;
}

.page-layout .inner-main {
  order: 1;
}

.page-layout .page-aside {
  order: 2;
}

.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 840px);
}

.sidebar-left .page-layout .inner-main,
.page-layout.sidebar-left .inner-main {
  order: 2;
}

.sidebar-left .page-layout .page-aside,
.page-layout.sidebar-left .page-aside {
  order: 1;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--ink-sub);
}

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

.breadcrumb a:hover {
  color: var(--brand);
  text-decoration: underline;
}

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

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

.page-header {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink-main);
}

.page-lead {
  margin-top: 12px;
  max-width: 62ch;
  color: var(--ink-sub);
}

.page-description {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.page-head {
  padding: 22px 0 4px;
}

.section-code,
.section-index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

/* ==========================================================================
   components —— 通用组件
   ========================================================================== */

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--brand);
  border-color: var(--brand);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: #196353;
  border-color: #196353;
}

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

.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
}

/* 更多链接 */

.more-link-wrap {
  margin-top: 22px;
}

.more-link,
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  border-bottom: 1px solid var(--brand);
  text-decoration: none;
  padding-bottom: 2px;
}

.more-link:hover,
.text-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

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

/* 定义列表 */

.def-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.def-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.def-term {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
  padding-top: 3px;
}

.def-desc {
  color: var(--ink-main);
  min-width: 0;
}

/* 编号要点列表 */

.numbered-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 26px;
}

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

.point-index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

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

.point-item p {
  color: var(--ink-sub);
  font-size: 15px;
}

/* 场景入口条 */

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

.scenario-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  color: var(--ink-main);
  text-decoration: none;
}

.scenario-item:hover {
  border-color: var(--line-strong);
  border-left-color: var(--brand);
  text-decoration: none;
}

.scenario-label {
  font-weight: 600;
  font-size: 16px;
}

.scenario-desc {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.scenario-link {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

/* 重点条目图文行 */

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.feature-row {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-row:hover {
  border-color: var(--brand);
  transform: translateX(2px);
}

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

.feature-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
}

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

.feature-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 6px;
}

.feature-title {
  margin-bottom: 10px;
  font-size: 20px;
}

.feature-scene,
.feature-need,
.feature-out {
  color: var(--ink-sub);
  font-size: 15px;
  margin-bottom: 6px;
}

.feature-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  border-bottom: 1px solid var(--brand);
  text-decoration: none;
}

.feature-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* 紧凑文本行列表 */

.compact-list {
  display: flex;
  flex-direction: column;
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.compact-item {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.compact-name {
  font-weight: 600;
  font-size: 15px;
}

.compact-desc {
  color: var(--ink-sub);
  font-size: 15px;
  min-width: 0;
}

.compact-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
  white-space: nowrap;
}

/* 编号步骤列表 */

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

.step-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.step-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
}

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

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

.step-basis {
  color: var(--ink-main);
  font-size: 15px;
  margin-bottom: 6px;
}

.step-pitfall {
  color: var(--ink-sub);
  font-size: 14px;
}

/* 两列对照块 */

.compare-grid,
.compare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

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

.compare-col-yes,
.compare-col-in {
  border-top: 3px solid var(--brand);
}

.compare-col-no,
.compare-col-out {
  border-top: 3px solid var(--accent);
}

.compare-title,
.compare-heading {
  margin-bottom: 12px;
  font-size: 17px;
}

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

.compare-list li,
.compare-item {
  position: relative;
  padding-left: 16px;
  color: var(--ink-sub);
  font-size: 15px;
  line-height: 1.7;
}

.compare-list li::before,
.compare-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--line-strong);
}

.compare-col-yes .compare-list li::before,
.compare-col-in .compare-list li::before {
  background-color: var(--brand);
}

.compare-col-no .compare-list li::before,
.compare-col-out .compare-list li::before {
  background-color: var(--accent);
}

/* 阶段列表（首页横向五段） */

.stage-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

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

.stage-index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

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

.stage-goal {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

/* 折叠问答（首页速览） */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

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

.faq-question {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  color: var(--ink-main);
  list-style: none;
  padding-right: 26px;
  position: relative;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--brand);
}

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

.faq-answer {
  margin-top: 10px;
  color: var(--ink-main);
  font-size: 15px;
}

.faq-note {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 14px;
}

.faq-extra {
  margin-top: 8px;
  color: var(--ink-sub);
  font-size: 14px;
}

/* 栏目索引栏 */

.page-aside {
  min-width: 0;
}

.aside-block {
  margin-bottom: 20px;
  padding: 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-sub);
}

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

.aside-list a {
  display: block;
  padding: 4px 0;
  color: var(--ink-main);
  font-size: 14px;
  text-decoration: none;
}

.aside-list a:hover {
  color: var(--brand);
  text-decoration: underline;
}

.aside-block-note {
  background-color: var(--bg-note);
  border-color: #EBDCBE;
}

.aside-note {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.75;
  margin-bottom: 8px;
}

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

.checklist-item {
  position: relative;
  padding-left: 18px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.checklist-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
}

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

.aside-links a {
  font-size: 14px;
}

/* 文字链接列表 */

.link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.link-list a {
  font-size: 15px;
  color: var(--brand);
}

/* 通用小节 */

.section {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child {
  border-bottom: none;
}

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

.section-lead {
  margin-top: 12px;
  max-width: 68ch;
  color: var(--ink-sub);
}

.section-intro {
  margin-top: 12px;
  max-width: 68ch;
  color: var(--ink-sub);
}

.section-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section-block:last-child {
  border-bottom: none;
}

.section-block h2 {
  font-size: 22px;
}

.section-block > p {
  margin-top: 12px;
  max-width: 68ch;
  color: var(--ink-sub);
}

.code-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.code-tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-sub);
}

/* 图片容器 */

.media-figure,
.content-figure,
.section-media,
.not-fit-figure {
  margin-top: 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.media-figure img,
.content-figure img,
.section-media img,
.not-fit-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
}

/* 提示条 */

.callout {
  margin-top: 18px;
  padding: 14px 16px;
  background-color: var(--bg-note);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--ink-main);
  font-size: 15px;
}

/* ==========================================================================
   pages —— 首页
   ========================================================================== */

.hero {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--line);
  padding: 48px 0 44px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 48px;
  align-items: center;
}

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

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.hero-copy h1 {
  font-size: 34px;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-lead {
  max-width: 60ch;
  color: var(--ink-main);
  font-size: 16px;
}

.hero-sub {
  max-width: 60ch;
  margin-top: 12px;
  color: var(--ink-sub);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background-color: var(--bg-page);
}

.hero-media figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

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

.bullet-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-sub);
  font-size: 15px;
  line-height: 1.7;
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--brand);
}

/* ==========================================================================
   pages —— 服务分类
   ========================================================================== */

.entry-row {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 24px;
  margin-top: 22px;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease;
}

.entry-row:hover {
  border-color: var(--brand);
}

.entry-figure {
  min-width: 0;
}

.entry-figure img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
}

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

.entry-body h3 {
  margin-bottom: 12px;
  font-size: 19px;
}

.field-list {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 6px 16px;
  margin-bottom: 12px;
}

.field-list dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
  padding-top: 3px;
}

.field-list dd {
  color: var(--ink-sub);
  font-size: 15px;
  min-width: 0;
}

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

.entry-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* ==========================================================================
   pages —— 观察方法
   ========================================================================== */

.step-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.step-flow-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 0;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.step-name {
  font-weight: 600;
  font-size: 15px;
}

.point-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.point-list .point-item {
  padding: 0 0 16px;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}

.point-list .point-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

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

.point-list .point-item p {
  color: var(--ink-sub);
  font-size: 15px;
}

/* ==========================================================================
   pages —— 交付清单
   ========================================================================== */

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-sub);
}

.content-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.content-section:last-child {
  border-bottom: none;
}

.content-section h2 {
  font-size: 22px;
}

.content-section > p {
  margin-top: 12px;
  max-width: 68ch;
  color: var(--ink-sub);
}

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

.deliverable-name {
  margin-bottom: 12px;
  font-size: 18px;
}

.plain-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

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

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--line-strong);
}

.media-block {
  margin-top: 20px;
}

.media-block img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background-color: var(--bg-page);
}

.reading-order {
  margin-top: 16px;
  padding: 16px;
  background-color: var(--bg-note);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--ink-main);
  font-size: 15px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--brand);
  text-decoration: none;
}

.related-list a:hover {
  border-color: var(--brand);
  text-decoration: none;
}

/* ==========================================================================
   pages —— 合作推进
   ========================================================================== */

.stage-overview,
.stage-detail,
.confirm-nodes,
.not-fit,
.related-links {
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}

.stage-overview h2,
.stage-detail h2,
.confirm-nodes h2,
.not-fit h2,
.related-links h2 {
  font-size: 22px;
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

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

.stage-grid .stage-num {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

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

.stage-block {
  margin-top: 24px;
  padding: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.stage-block-head .stage-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.stage-block-head .stage-name {
  font-size: 18px;
}

.stage-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 16px;
}

.stage-col {
  min-width: 0;
}

.stage-col-title {
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}

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

.stage-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-sub);
  font-size: 15px;
  line-height: 1.7;
}

.stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background-color: var(--line-strong);
}

.node-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

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

.node-num {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.node-name {
  margin-bottom: 8px;
  font-size: 17px;
}

.node-item p:last-child {
  color: var(--ink-sub);
  font-size: 15px;
}

.adjust-note {
  margin-top: 22px;
  padding: 18px;
  background-color: var(--bg-note);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
}

.adjust-title {
  margin-bottom: 8px;
  font-size: 16px;
}

.adjust-note p {
  color: var(--ink-sub);
  font-size: 15px;
}

.not-fit-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  align-items: start;
  margin-top: 24px;
}

.not-fit-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.not-fit-list li {
  padding: 16px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.not-fit-name {
  margin-bottom: 6px;
  font-size: 16px;
}

.not-fit-list li p {
  color: var(--ink-sub);
  font-size: 15px;
}

.not-fit-figure {
  margin-top: 0;
}

.not-fit-figure img {
  height: 260px;
}

.related-links {
  border-bottom: none;
}

/* ==========================================================================
   pages —— 边界说明
   ========================================================================== */

.scope-compare,
.scope-detail,
.misconceptions,
.client-materials {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.scope-compare h2,
.scope-detail h2,
.misconceptions h2,
.client-materials h2 {
  font-size: 22px;
}

.reason-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 22px;
}

.reason-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.reason-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding-top: 4px;
}

.reason-item h3 {
  grid-column: 2;
  margin-bottom: 6px;
  font-size: 16px;
}

.reason-item p {
  grid-column: 2;
  color: var(--ink-sub);
  font-size: 15px;
}

.reason-title {
  font-size: 16px;
}

.misconception-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.misconception-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.misconception-claim {
  position: relative;
  padding-left: 18px;
  color: var(--ink-sub);
  font-size: 15px;
  margin-bottom: 0;
}

.misconception-claim::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--line-strong);
}

.misconception-fact {
  position: relative;
  padding-left: 18px;
  color: var(--ink-main);
  font-size: 15px;
  margin-bottom: 0;
}

.misconception-fact::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--brand);
}

.material-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 22px;
}

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

.item-name {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--brand);
}

.material-item p {
  color: var(--ink-sub);
  font-size: 15px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 28px 0 8px;
  border-bottom: none;
}

.related-links-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-sub);
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--brand);
  text-decoration: none;
}

.related-links-item:hover {
  border-color: var(--brand);
  text-decoration: none;
}

/* ==========================================================================
   pages —— 常见问题
   ========================================================================== */

.faq-group {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: 4px;
}

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

.section-desc {
  margin-top: 10px;
  max-width: 68ch;
  color: var(--ink-sub);
}

.faq-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}

.faq-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.faq-col .faq-item {
  padding: 16px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-links {
  padding: 32px 0 8px;
}

.next-links h2 {
  font-size: 22px;
}

.next-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

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

.next-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-main);
  text-decoration: none;
}

.next-link:hover {
  border-color: var(--brand);
  text-decoration: none;
}

.next-name {
  font-weight: 600;
  font-size: 16px;
  color: var(--brand);
}

.next-desc {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

/* ==========================================================================
   pages —— 404
   ========================================================================== */

.error-main {
  flex: 1 0 auto;
}

.error-inner {
  padding-top: 72px;
  padding-bottom: 72px;
  max-width: 720px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--brand);
  margin-bottom: 12px;
}

.error-inner h1 {
  font-size: 30px;
  margin-bottom: 14px;
}

.error-desc {
  color: var(--ink-sub);
  max-width: 60ch;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.error-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--ink-main);
  text-decoration: none;
}

.error-links a:hover {
  border-color: var(--brand);
  color: var(--brand);
  text-decoration: none;
}

.error-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 26px;
  padding: 0 22px;
  background-color: var(--brand);
  border-radius: var(--radius);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.error-home:hover {
  background-color: #196353;
  text-decoration: none;
}

/* ==========================================================================
   responsive —— 960px 与 640px 断点
   ========================================================================== */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .hero-copy h1 {
    font-size: 28px;
  }

  .hero-media img {
    height: 260px;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .page-layout .inner-main,
  .sidebar-left .page-layout .inner-main,
  .page-layout.sidebar-left .inner-main {
    order: 1;
  }

  .page-layout .page-aside,
  .sidebar-left .page-layout .page-aside,
  .page-layout.sidebar-left .page-aside {
    order: 2;
  }

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

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

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

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

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

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

  .not-fit-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .entry-row {
    grid-template-columns: 240px minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .container,
  .header-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

  /* 移动端导航：仅收起 .nav-list 本身 */

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 6px 16px rgba(14, 31, 38, 0.08);
  }

  .site-header {
    position: relative;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .nav-link.is-current {
    border-bottom-color: var(--brand);
  }

  .brand-tagline {
    font-size: 14px;
    white-space: normal;
  }

  .hero {
    padding: 32px 0 36px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .hero-media img {
    height: 200px;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .page-title,
  .error-inner h1 {
    font-size: 24px;
  }

  .section,
  .stage-overview,
  .stage-detail,
  .confirm-nodes,
  .not-fit,
  .related-links,
  .faq-group,
  .next-links,
  .content-section,
  .scope-compare,
  .scope-detail,
  .misconceptions,
  .client-materials,
  .section-block {
    padding-top: 26px;
    padding-bottom: 26px;
  }

  .section-title,
  .content-section h2,
  .section-block h2,
  .stage-overview h2,
  .stage-detail h2,
  .confirm-nodes h2,
  .not-fit h2,
  .related-links h2,
  .scope-compare h2,
  .scope-detail h2,
  .misconceptions h2,
  .client-materials h2,
  .section-head h2,
  .next-links h2 {
    font-size: 20px;
  }

  .numbered-points,
  .scenario-bar,
  .compare-grid,
  .compare-columns,
  .stage-list,
  .stage-grid,
  .step-flow,
  .node-list,
  .next-list,
  .faq-columns,
  .stage-columns,
  .misconception-row,
  .error-links,
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature-row,
  .entry-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 16px;
  }

  .feature-media img,
  .entry-figure img {
    height: 180px;
  }

  .def-row,
  .field-list,
  .compact-item,
  .step-item,
  .reason-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .compact-item {
    gap: 6px;
  }

  .reason-item h3,
  .reason-item p {
    grid-column: 1;
  }

  .step-item {
    gap: 10px;
  }

  .media-figure img,
  .content-figure img,
  .section-media img,
  .not-fit-figure img,
  .media-block img {
    height: 190px;
  }

  .footer-inner {
    gap: 24px;
  }

  .error-inner {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}

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

  .feature-row {
    transition: none;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}