/* ==========================================================================
   51吃瓜入口 xinliusoft.com — 企业线上入口搭建服务官网
   样式分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --bg-page: #f6f8fa;
  --bg-surface: #ffffff;
  --bg-hover: #edf3f6;
  --bg-subtle: #f1f5f8;
  --text-main: #17222e;
  --text-sub: #5a6b7b;
  --text-weak: #8a98a6;
  --primary: #0e7c86;
  --primary-dark: #0a616a;
  --accent: #1e5fa8;
  --ok: #1e8e5a;
  --hold: #b4761a;
  --no: #c0392b;
  --line: #e2e8ee;
  --line-strong: #cfd8e0;
  --radius: 6px;
  --radius-sm: 4px;
  --container: 1120px;
  --pad-x: 32px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --header-h: 64px;
}

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

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

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

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

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

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

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

p {
  margin: 0 0 14px;
}

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

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

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

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

/* 通用等宽标签 */
.mono,
.mono-label,
.section-code,
.section-num,
.start-flow__code,
.aside-index__code,
.aside-nav__code,
.aside-nav__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0;
  color: var(--primary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   layout — 骨架：header / main / footer / 容器
   -------------------------------------------------------------------------- */

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

.site-header__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  flex: 0 0 auto;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0;
}

.brand:hover {
  color: var(--primary);
  text-decoration: none;
}

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.main-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.main-nav__item > a {
  display: inline-block;
  padding: 6px 10px;
  font-size: 15px;
  color: var(--text-sub);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.main-nav__item > a:hover {
  color: var(--text-main);
  background: var(--bg-hover);
  border-left-color: var(--primary);
  text-decoration: none;
}

.main-nav__item.is-current > a {
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  background: var(--bg-hover);
}

.nav-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  font-size: 15px;
  color: #fff;
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.nav-cta:hover {
  color: #fff;
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--bg-surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 15px;
  height: 2px;
  background: var(--text-main);
  box-shadow: 0 6px 0 var(--text-main), 0 12px 0 var(--text-main);
}

.nav-toggle:hover {
  background: var(--bg-hover);
}

.mobile-menu {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--line);
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu__list {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px var(--pad-x) 16px;
}

.mobile-menu__list li + li {
  border-top: 1px solid var(--line);
}

.mobile-menu__list a {
  display: block;
  min-height: 48px;
  line-height: 48px;
  font-size: 15px;
  color: var(--text-main);
}

.mobile-menu__list a:hover {
  color: var(--primary);
  text-decoration: none;
}

.site-main {
  display: block;
}

.home-main,
.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 12px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 24px;
}

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

.page-hero {
  margin-bottom: 28px;
}

.page-hero__eyebrow {
  margin-bottom: 8px;
}

.page-hero__lead,
.page-title__lead {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}

/* 内页两栏：默认主内容在前，aside 在后；.sidebar-left 才允许侧栏在前 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 300px minmax(0, 1fr);
}

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

.page-aside {
  min-width: 0;
  font-size: 14px;
}

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

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

.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--pad-x) 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.footer-col__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.footer-col__list li + li {
  margin-top: 8px;
}

.footer-col__list a {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

.footer-col__list a:hover {
  color: var(--primary);
}

.site-footer__bottom {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
}

.site-footer__brand {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.site-footer__note {
  margin: 0;
  font-size: 13px;
  color: var(--text-weak);
}

/* --------------------------------------------------------------------------
   components — 通用组件
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn--primary:hover {
  color: #fff;
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  text-decoration: none;
}

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

.btn--ghost:hover {
  color: var(--primary-dark);
  background: var(--bg-hover);
  border-color: var(--primary);
  text-decoration: none;
}

.text-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
}

.text-link:hover {
  color: var(--primary-dark);
}

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

.section-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.section-lead {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}

.subsection-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin: 24px 0 10px;
}

.section-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-sub);
}

.section-figure,
.scope-figure,
.content-figure,
.figure,
.article-media {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-surface);
  overflow: hidden;
}

.section-figure img,
.scope-figure img,
.content-figure img,
.figure img,
.article-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--bg-subtle);
}

.section-figure figcaption,
.scope-figure figcaption,
.content-figure__caption,
.figure figcaption,
.article-media__caption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-weak);
  border-top: 1px solid var(--line);
}

/* 状态标签 */
.status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  padding: 1px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid currentColor;
  white-space: nowrap;
}

.status--ok {
  color: var(--ok);
}

.status--hold {
  color: var(--hold);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 1px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid currentColor;
}

.tag--ok {
  color: var(--ok);
}

.tag--hold {
  color: var(--hold);
}

/* 侧栏通用块 */
.aside-block,
.aside-index,
.aside-note,
.aside-modules,
.aside-toc {
  margin-bottom: 20px;
}

.aside-block__title,
.aside-index__title,
.aside-note__title,
.aside-modules__title,
.aside-toc__title,
.aside__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-mono);
  letter-spacing: 0;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-toc__list li,
.aside-list li,
.aside-nav__list li,
.aside-links li,
.aside-index__list li,
.aside-modules__list li {
  border-bottom: 1px solid var(--line);
}

.aside-toc__list li:last-child,
.aside-list li:last-child,
.aside-nav__list li:last-child,
.aside-links li:last-child,
.aside-index__list li:last-child,
.aside-modules__list li:last-child {
  border-bottom: 0;
}

.aside-toc__list a,
.aside-list a,
.aside-nav__list a,
.aside-links a,
.aside-index__list a,
.aside-modules__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-height: 40px;
  padding: 8px 8px 8px 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-sub);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.aside-toc__list a:hover,
.aside-list a:hover,
.aside-nav__list a:hover,
.aside-links a:hover,
.aside-index__list a:hover,
.aside-modules__list a:hover {
  color: var(--text-main);
  background: var(--bg-hover);
  border-left-color: var(--primary);
  text-decoration: none;
}

.aside-block--note {
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.aside-block--note .aside-block__title {
  border-bottom-color: var(--line-strong);
}

.aside-note {
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

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

/* 折叠块（移动端摘要栏） */
.aside-fold,
.aside-collapse {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-surface);
  margin-bottom: 16px;
}

.aside-fold__summary,
.aside-collapse__summary {
  cursor: pointer;
  list-style: none;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.aside-fold__summary::-webkit-details-marker,
.aside-collapse__summary::-webkit-details-marker {
  display: none;
}

.aside-fold__summary::before,
.aside-collapse__summary::before {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex: 0 0 auto;
}

.aside-fold[open] .aside-fold__summary::before,
.aside-collapse[open] .aside-collapse__summary::before {
  transform: rotate(45deg);
}

.aside-fold .aside-toc,
.aside-collapse .aside-nav {
  margin: 0;
  padding: 0 10px 10px;
}

/* 相关页面带 */
.related-links,
.related-band,
.related-strip,
.related-bar {
  margin-top: 40px;
  padding: 18px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
}

.related-links-label,
.related-band__title,
.related-strip__title,
.related-bar__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-mono);
  margin: 0;
  flex: 0 0 auto;
}

.related-links-item,
.related-band__list a,
.related-strip__list a,
.related-bar__list a {
  font-size: 14px;
  color: var(--primary);
}

.related-band__list,
.related-strip__list,
.related-bar__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.related-band__list li,
.related-strip__item,
.related-bar__list li {
  min-height: 32px;
  display: flex;
  align-items: center;
}

/* 规则列表（通用） */
.rule-list {
  margin-top: 12px;
}

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

.rule-list__item:last-child {
  border-bottom: 1px solid var(--line);
}

.rule-list__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.rule-list__cond {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--hold);
  margin-bottom: 4px;
}

.rule-list__way {
  display: block;
  font-size: 15px;
  color: var(--text-sub);
}

/* 勾选清单 */
.check-list {
  margin-top: 10px;
}

.check-list li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
  border-bottom: 1px solid var(--line);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--ok);
}

.check-list--muted li::before {
  background: var(--text-weak);
}

.check-list li:last-child {
  border-bottom: 0;
}

/* 数据表 */
.data-table {
  margin: 16px 0;
  font-size: 15px;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.data-table__caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-weak);
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  text-align: left;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  background: var(--bg-subtle);
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-strong);
}

.data-table tbody td {
  padding: 12px 16px;
  vertical-align: top;
  line-height: 1.75;
  color: var(--text-sub);
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody td:first-child {
  color: var(--text-main);
  font-weight: 500;
  white-space: nowrap;
}

/* 折叠问答 */
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-surface);
  margin-bottom: 10px;
}

.faq-item__q {
  cursor: pointer;
  list-style: none;
  padding: 14px 16px;
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
}

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

.faq-item__q::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

.faq-item[open] .faq-item__q::before {
  transform: rotate(45deg);
}

.faq-item[open] .faq-item__q {
  color: var(--primary);
  border-bottom: 1px solid var(--line);
}

.faq-item__a {
  padding: 14px 16px 16px;
}

.faq-item__a p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
}

/* --------------------------------------------------------------------------
   pages — 首页
   -------------------------------------------------------------------------- */

.site-home .site-main {
  padding-bottom: 40px;
}

/* 首屏 */
.hero {
  padding: 40px 0 8px;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 40px;
  align-items: start;
}

.hero__lead {
  min-width: 0;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 12px;
}

.hero__lead h1 {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero__intro {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.hero__note {
  max-width: 720px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-weak);
  margin-bottom: 22px;
}

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

.hero__media {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-surface);
  overflow: hidden;
}

.hero__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--bg-subtle);
}

.hero__media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-weak);
  border-top: 1px solid var(--line);
}

/* 四步服务路径带 */
.path-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.path-band__step {
  background: var(--bg-surface);
  padding: 18px 16px;
  min-width: 0;
}

.path-band__name {
  font-size: 17px;
  font-weight: 600;
  margin: 8px 0 6px;
}

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

/* 首屏服务目录 */
.service-index {
  margin-top: 40px;
}

.service-index__list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.service-index__row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.service-index__row:hover {
  background: var(--bg-hover);
  border-left-color: var(--primary);
}

.service-index__body {
  min-width: 0;
}

.service-index__body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

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

.service-index__link {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}

/* 主线能力 */
.capability {
  margin-top: 56px;
}

.capability__block {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  gap: 32px;
  align-items: start;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.capability__block:last-child {
  border-bottom: 1px solid var(--line);
}

.capability__text {
  min-width: 0;
}

.capability__text h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}

.capability__text p {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
}

.capability__list {
  margin-top: 14px;
}

.capability__list li {
  position: relative;
  padding: 6px 0 6px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-main);
  border-bottom: 1px solid var(--line);
}

.capability__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 2px;
  background: var(--primary);
}

.capability__list li:last-child {
  border-bottom: 0;
}

.capability__media {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-surface);
  overflow: hidden;
}

.capability__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background: var(--bg-subtle);
}

.capability__media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-weak);
  border-top: 1px solid var(--line);
}

/* 服务明细 */
.service-detail {
  margin-top: 56px;
}

.service-detail__list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.service-detail__row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 12px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.service-detail__row:hover {
  background: var(--bg-hover);
  border-left-color: var(--line-strong);
}

.service-detail__body {
  min-width: 0;
}

.service-detail__body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-main);
}

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

/* 推进路径预览 */
.stage-preview {
  margin-top: 56px;
}

.timeline {
  margin-top: 16px;
  border-left: 2px solid var(--line-strong);
  padding-left: 20px;
}

.timeline__item {
  position: relative;
  padding: 4px 0 24px;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--accent);
}

.timeline__name {
  font-size: 17px;
  font-weight: 600;
  margin: 6px 0 6px;
}

.timeline__action {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 4px;
}

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

/* 适合与建议先梳理 */
.fit-compare {
  margin-top: 56px;
}

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

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

.fit-compare__col h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.fit-compare__col--go h3 {
  color: var(--ok);
}

.fit-compare__col--hold h3 {
  color: var(--hold);
}

.fit-compare__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.fit-compare__list li:first-child {
  border-top: 0;
}

.fit-compare__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}

/* 常见问题摘要 */
.faq-brief {
  margin-top: 56px;
}

.faq-brief__list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.faq-brief__item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.faq-brief__item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.faq-brief__item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
  margin: 0;
}

.faq-brief__more {
  margin-top: 16px;
}

/* 合作洽谈入口 */
.contact-entry {
  margin-top: 56px;
}

.contact-entry__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-entry__text {
  min-width: 0;
}

.contact-entry__list {
  margin-top: 18px;
}

.contact-entry__list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.contact-entry__list h3 {
  grid-column: 2;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-entry__list p {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-sub);
  margin: 0;
}

.contact-entry__list .mono-label {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 2px;
}

.contact-entry__aside {
  min-width: 0;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.contact-entry__aside h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.contact-entry__aside p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.contact-entry__hint {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-weak);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

/* --------------------------------------------------------------------------
   pages — 服务能力
   -------------------------------------------------------------------------- */

.page-service-scope .content-intro {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 8px;
}

.scope-section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.scope-section:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.scope-section__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
}

.scope-section__lead {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
}

.scope-section__sub {
  font-size: 16px;
  font-weight: 600;
  margin: 22px 0 8px;
  color: var(--text-main);
}

.scope-section__sub--exclude {
  color: var(--text-sub);
}

.scope-module-list {
  margin-top: 10px;
}

.scope-module-list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}

.scope-module-list li:last-child {
  border-bottom: 0;
}

.scope-section--link .relation-chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin: 18px 0;
}

.relation-chain__node {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--accent);
}

.relation-chain__arrow {
  font-family: var(--font-mono);
  color: var(--text-weak);
  font-size: 14px;
}

.relation-chain__arrow::before {
  content: "→";
}

/* --------------------------------------------------------------------------
   pages — 适配判断
   -------------------------------------------------------------------------- */

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

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

.state-item:last-child {
  border-bottom: 1px solid var(--line);
}

.state-item__title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.state-item__signal {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ok);
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  padding: 1px 7px;
  margin-bottom: 8px;
}

.state-item__desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
  margin: 0;
}

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

.hold-item {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.hold-item:last-child {
  border-bottom: 1px solid var(--line);
}

.hold-item__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.hold-item__desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
  margin: 0;
}

.check-table {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-surface);
}

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

.check-table__row + .check-table__row {
  border-top: 1px solid var(--line);
}

.check-table__cell {
  padding: 12px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
  min-width: 0;
}

.check-table__cell--q {
  border-right: 1px solid var(--line);
  color: var(--text-main);
  font-weight: 500;
}

.check-table__cell--a {
  background: var(--bg-subtle);
}

.check-table__row--head .check-table__cell {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-main);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--line-strong);
}

.check-table__row--head .check-table__cell--q {
  background: var(--bg-subtle);
}

.check-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-sub);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

/* --------------------------------------------------------------------------
   pages — 工作方法
   -------------------------------------------------------------------------- */

.article-section {
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.article-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
}

.article-p {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
}

.stage-detail {
  margin: 16px 0 0;
  border-top: 1px solid var(--line);
}

.stage-detail__term {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-mono);
  padding-top: 12px;
}

.stage-detail__desc {
  margin: 4px 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.stage-detail__desc:last-of-type {
  border-bottom: 0;
}

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

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

.division-col__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.division-col--ours .division-col__title {
  color: var(--primary);
}

.division-col--client .division-col__title {
  color: var(--accent);
}

.division-col__list li {
  position: relative;
  padding: 8px 0 8px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
  border-bottom: 1px solid var(--line);
}

.division-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 8px;
  height: 2px;
  background: var(--line-strong);
}

.division-col__list li:last-child {
  border-bottom: 0;
}

/* --------------------------------------------------------------------------
   pages — 交付标准
   -------------------------------------------------------------------------- */

.content-section {
  margin-bottom: 40px;
}

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

.page-delivery-standard .content-section > p,
.page-faq .section-lead,
.page-contact .section-lead {
  max-width: 720px;
}

/* --------------------------------------------------------------------------
   pages — 合作问答
   -------------------------------------------------------------------------- */

.page-faq .aside-nav__list a {
  align-items: baseline;
}

/* --------------------------------------------------------------------------
   pages — 合作洽谈
   -------------------------------------------------------------------------- */

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

.prep-item:last-child {
  border-bottom: 1px solid var(--line);
}

.prep-item__title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.prep-item p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
  max-width: 720px;
}

.confirm-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

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

.confirm-list__q {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
}

.confirm-list__a {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}

.start-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 16px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.start-flow__step {
  background: var(--bg-surface);
  padding: 18px 16px;
  min-width: 0;
}

.start-flow__title {
  font-size: 16px;
  font-weight: 600;
  margin: 8px 0 6px;
}

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

/* --------------------------------------------------------------------------
   pages — 404
   -------------------------------------------------------------------------- */

.site-error .error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px var(--pad-x) 40px;
}

.error-block {
  max-width: 640px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 12px;
}

.error-title {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 14px;
}

.error-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 24px;
}

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

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--bg-surface);
  color: var(--primary);
}

.error-btn:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
  text-decoration: none;
}

.error-btn--primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.error-btn--primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
}

.error-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.error-links__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.error-links__list a {
  font-size: 15px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

/* 移动端底部任务导航（默认隐藏，手机显示） */
.mobile-tabbar,
.task-nav,
.mobile-task-nav {
  display: none;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

/* 平板 680–1079 */
@media (max-width: 1079px) {
  :root {
    --pad-x: 24px;
  }

  .main-nav__list {
    gap: 2px;
  }

  .main-nav__item > a {
    padding: 6px 8px;
    font-size: 14px;
  }

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

  .hero__lead h1 {
    font-size: 30px;
  }

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

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

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

  .capability__media {
    max-width: 560px;
  }

  .contact-entry__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

/* 手机 <680 */
@media (max-width: 679px) {
  :root {
    --pad-x: 16px;
    --header-h: 60px;
  }

  body {
    font-size: 16px;
    padding-bottom: 64px;
  }

  /* 页头：隐藏桌面导航，显示按钮 */
  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: block;
    margin-left: auto;
  }

  .nav-cta {
    display: none;
  }

  .site-header__inner {
    gap: 12px;
  }

  /* 内页两栏：单列，主内容在前 */
  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-layout.sidebar-left .page-aside {
    order: 0;
  }

  .page-layout.sidebar-left .page-content,
  .page-layout.sidebar-left .page-body,
  .page-layout.sidebar-left .page-article {
    order: -1;
  }

  .page-aside {
    position: static;
  }

  .page-title {
    font-size: 22px;
  }

  .page-hero {
    margin-bottom: 20px;
  }

  /* 首页首屏 */
  .hero {
    padding: 24px 0 4px;
  }

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

  .hero__lead h1 {
    font-size: 24px;
  }

  .hero__intro,
  .hero__note {
    max-width: none;
  }

  .hero__actions {
    gap: 10px;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
  }

  .hero__media img {
    aspect-ratio: 16 / 10;
  }

  /* 路径带两行两列 */
  .path-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* 服务目录 */
  .service-index__row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
  }

  .service-index__link {
    grid-column: 2;
    margin-top: 6px;
  }

  /* 主线能力 */
  .capability__block {
    grid-template-columns: minmax(0, 1fr);
    padding: 22px 0;
  }

  .capability__media {
    max-width: none;
  }

  /* 服务明细 */
  .service-detail__row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
  }

  /* 对照双栏上下堆叠 */
  .fit-compare__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* 洽谈入口 */
  .contact-entry__grid {
    grid-template-columns: minmax(0, 1fr);
    padding: 20px;
  }

  .contact-entry__list li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
  }

  /* 工作方法分工表上下堆叠 */
  .division-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* 自查表逐行堆叠 */
  .check-table__row {
    grid-template-columns: minmax(0, 1fr);
  }

  .check-table__cell--q {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  /* 洽谈确认清单堆叠 */
  .confirm-list__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  /* 流程条两行两列 */
  .start-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* 表格：横向可滚动但不撑破页面 */
  .data-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .data-table thead th,
  .data-table tbody td {
    padding: 10px 12px;
  }

  .data-table tbody td:first-child {
    white-space: normal;
  }

  /* 关系链换行 */
  .relation-chain__node {
    font-size: 14px;
    padding: 6px 10px;
  }

  /* 相关页面带 */
  .related-links,
  .related-band,
  .related-strip,
  .related-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .related-band__list,
  .related-strip__list,
  .related-bar__list {
    flex-direction: column;
    gap: 4px;
    width: 100%;
  }

  /* 页脚四栏堆叠 */
  .site-footer {
    margin-top: 40px;
  }

  .site-footer__inner {
    padding: 28px var(--pad-x) 20px;
  }

  .site-footer__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .site-footer__bottom {
    flex-direction: column;
    gap: 6px;
  }

  /* 404 */
  .site-error .error-main {
    padding: 40px var(--pad-x) 32px;
  }

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

  /* 移动端底部任务导航 */
  .mobile-tabbar,
  .task-nav,
  .mobile-task-nav {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 50;
    background: var(--bg-surface);
    border-top: 1px solid var(--line);
  }

  .mobile-tabbar__list,
  .task-nav__list,
  .mobile-task-nav__list {
    display: flex;
    align-items: stretch;
  }

  .mobile-tabbar__list li,
  .task-nav__item,
  .mobile-task-nav__list li {
    flex: 1 1 0;
    min-width: 0;
  }

  .mobile-tabbar__list a,
  .task-nav__item a,
  .mobile-task-nav__list a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 56px;
    padding: 4px 2px;
    font-size: 13px;
    color: var(--text-sub);
    text-align: center;
    line-height: 1.3;
  }

  .mobile-tabbar__list a:hover,
  .task-nav__item a:hover,
  .mobile-task-nav__list a:hover {
    color: var(--primary);
    text-decoration: none;
  }

  /* 触摸目标 */
  .btn,
  .text-link,
  .service-index__link,
  .faq-item__q,
  .aside-toc__list a,
  .aside-list a,
  .aside-nav__list a,
  .aside-links a,
  .aside-index__list a,
  .aside-modules__list a {
    min-height: 48px;
  }

  .service-index__link,
  .text-link {
    display: inline-flex;
    align-items: center;
  }
}

/* 超窄屏微调 */
@media (max-width: 400px) {
  .path-band,
  .start-flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__lead h1 {
    font-size: 22px;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* 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;
  }
}