/* =========================================================
   51吃瓜台北娜娜 · 企业服务官网 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================= */

/* ---------------------------------------------------------
   1. base · 变量与基础重置
   --------------------------------------------------------- */
:root {
  --paper: #F5F2EA;
  --ink: #1D2733;
  --copper: #A45A2A;
  --link: #2B5C7E;
  --muted: #6E7681;
  --rule: #D9D3C6;
  --footer-bg: #16202B;
  --surface: #FFFFFF;

  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;

  --container: 1120px;
  --reading: 760px;
  --side: 240px;
  --gap: 40px;
  --radius: 4px;
  --header-h: 64px;
}

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

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

body.site-body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

a:hover,
a:focus-visible {
  color: var(--copper);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.2em;
}

li {
  margin-bottom: 0.4em;
}

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* ---------------------------------------------------------
   2. layout · 容器与全站骨架
   --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-header {
  position: relative;
  z-index: 30;
  background-color: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: var(--header-h);
}

.brand {
  flex: 0 0 auto;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0;
  white-space: nowrap;
}

.brand:hover {
  color: var(--copper);
}

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

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

.site-nav a.is-current {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

.header-extra {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.header-extra a {
  color: var(--muted);
}

.header-extra a:hover {
  color: var(--copper);
}

.header-extra a.header-cta {
  padding: 7px 16px;
  color: var(--surface);
  background-color: var(--copper);
  border-radius: var(--radius);
}

.header-extra a.header-cta:hover {
  color: var(--surface);
  background-color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle::before {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background-color: var(--ink);
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
}

.mobile-nav {
  background-color: var(--surface);
  border-bottom: 1px solid var(--rule);
}

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

.mobile-nav ul {
  margin: 0;
  padding: 8px 0;
  list-style: none;
}

.mobile-nav li {
  margin: 0;
}

.mobile-nav a {
  display: block;
  padding: 12px 24px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.mobile-nav li:last-child a {
  border-bottom: 0;
}

.mobile-nav a:hover {
  color: var(--copper);
  background-color: var(--paper);
}

.site-main {
  display: block;
}

.inner-main {
  padding-bottom: 8px;
}

/* 内页通用页标题区（编号 + H1 + 摘要） */
.page-header {
  padding: 8px 0 18px;
  border-bottom: 1px solid var(--rule);
}

.page-title {
  margin: 0;
  font-size: 30px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

.page-index {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  color: var(--copper);
}

.page-index .index-num,
.page-index .index-no {
  font-weight: 600;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.inner-main > .breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

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

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

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

/* 内页主布局：主内容在前、侧栏在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--side);
  gap: var(--gap);
  align-items: start;
  padding-top: 28px;
  padding-bottom: 8px;
}

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

.side-column,
.content-side,
.content-aside,
.page-aside,
.layout-sidebar {
  min-width: 0;
  font-size: 14px;
}

/* ---------------------------------------------------------
   3. components · 通用组件
   --------------------------------------------------------- */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  color: var(--surface);
  background-color: var(--copper);
  border-color: var(--copper);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--surface);
  background-color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost {
  color: var(--ink);
  background-color: transparent;
  border-color: var(--rule);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--copper);
  border-color: var(--copper);
}

/* 索引标签 */
.index-tags,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.index-tags li,
.tag-row li,
.tag {
  margin: 0;
}

.index-tags a,
.tag-row a,
.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
  background-color: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.index-tags a:hover,
.tag-row a:hover {
  color: var(--surface);
  background-color: var(--copper);
  border-color: var(--copper);
}

/* 侧栏区块 */
.side-block,
.aside-block,
.sidebar-block {
  padding: 0 0 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}

.side-block:last-child,
.aside-block:last-child,
.sidebar-block:last-child {
  border-bottom: 0;
}

.side-block h2,
.aside-block h2,
.sidebar-block h2 {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--copper);
}

.anchor-list,
.side-anchor-list,
.side-link-list,
.aside-links,
.sidebar-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.anchor-list li,
.side-anchor-list li,
.side-link-list li,
.aside-links li,
.sidebar-list li {
  margin: 0 0 2px;
}

.anchor-list a,
.side-anchor-list a,
.side-link-list a,
.aside-links a,
.sidebar-list a {
  display: block;
  padding: 7px 0 7px 12px;
  font-size: 14px;
  color: var(--link);
  border-left: 2px solid var(--rule);
  line-height: 1.6;
}

.anchor-list a:hover,
.side-anchor-list a:hover,
.side-link-list a:hover,
.aside-links a:hover,
.sidebar-list a:hover {
  color: var(--copper);
  border-left-color: var(--copper);
}

.aside-index h2,
.aside-links h2 {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--copper);
}

.aside-index,
.aside-links {
  padding: 0 0 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}

.aside-links {
  border-bottom: 0;
  margin-bottom: 0;
}

.aside-index ul,
.aside-links ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.aside-index li,
.aside-links li {
  margin: 0 0 2px;
}

.aside-index a,
.aside-links a {
  display: block;
  padding: 7px 0 7px 12px;
  font-size: 14px;
  color: var(--link);
  border-left: 2px solid var(--rule);
}

.aside-index a:hover,
.aside-links a:hover {
  color: var(--copper);
  border-left-color: var(--copper);
}

/* 时间节点速览（准备材料页侧栏） */
.aside-node {
  padding: 0 0 14px;
  margin-bottom: 14px;
  border-bottom: 1px dashed var(--rule);
}

.aside-node:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.aside-node h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.aside-node ul {
  margin: 0;
  padding-left: 1.1em;
  font-size: 13px;
  color: var(--muted);
}

.aside-node li {
  margin-bottom: 2px;
}

/* 通用段落与链接文字 */
.section-intro,
.block-lead,
.group-intro,
.direction-scope {
  color: var(--muted);
  font-size: 15px;
}

.section-more,
.block-link,
.combine-note {
  margin: 18px 0 0;
  font-size: 15px;
}

.section-more a,
.block-link a,
.combine-note a {
  color: var(--link);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
}

.section-more a:hover,
.block-link a:hover,
.combine-note a:hover {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

.note {
  margin: 12px 0 0;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--muted);
  background-color: var(--surface);
  border-left: 3px solid var(--copper);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* 图片容器 */
.hero-media,
.section-media,
.method-media,
.hero-figure,
.page-figure,
.media-figure,
.content-figure,
.method-figure {
  margin: 0;
  overflow: hidden;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.hero-media img,
.section-media img,
.method-media img,
.hero-figure img,
.page-figure img,
.media-figure img,
.content-figure img,
.method-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--rule);
}

/* 表格 */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background-color: var(--surface);
}

.data-table {
  width: 100%;
  min-width: 520px;
  font-size: 15px;
  background-color: var(--surface);
}

.data-table caption {
  padding: 12px 14px;
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--muted);
  text-align: left;
  border-bottom: 1px solid var(--rule);
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
}

.data-table thead th {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background-color: var(--paper);
  white-space: nowrap;
}

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

.data-table td {
  color: var(--ink);
}

/* 列表 */
.check-list {
  margin: 0;
  padding-left: 1.1em;
  list-style: square;
}

.check-list li {
  margin-bottom: 6px;
}

.plain-list {
  margin: 0;
  padding-left: 1.1em;
  list-style: none;
}

.plain-list li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background-color: var(--copper);
  border-radius: 1px;
}

.step-list {
  margin: 0;
  padding-left: 1.3em;
}

.step-list li {
  margin-bottom: 12px;
}

.step-list strong {
  color: var(--ink);
}

.record-list {
  margin: 12px 0 0;
  padding-left: 1.1em;
  font-size: 15px;
  color: var(--muted);
}

/* 下一步任务带 */
.next-band,
.next-tasks {
  margin-top: 40px;
  padding: 30px 0 44px;
  border-top: 1px solid var(--rule);
}

.next-band > .container,
.next-tasks > .container {
  display: block;
}

.next-band h2,
.next-tasks h2 {
  font-size: 22px;
  margin-bottom: 18px;
}

.next-list,
.task-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.next-list li,
.task-band li {
  margin: 0;
}

.next-list a,
.task-band a,
.next-card,
.task-item {
  display: block;
  height: 100%;
  padding: 18px 20px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.next-list a:hover,
.task-band a:hover,
.next-card:hover,
.task-item:hover {
  border-color: var(--copper);
  transform: translateY(-2px);
}

.next-title,
.task-title {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.next-desc,
.task-desc {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.task-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.task-item p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* 页脚 */
.site-footer {
  margin-top: 8px;
  background-color: var(--footer-bg);
  color: #C9CFD6;
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-top: 44px;
  padding-bottom: 32px;
}

.footer-logo {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-desc {
  margin: 0;
  line-height: 1.8;
  color: #9AA4AF;
}

.footer-col h2 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col li {
  margin: 0 0 8px;
}

.footer-col a {
  color: #C9CFD6;
}

.footer-col a:hover {
  color: #E4A97A;
}

.footer-note {
  margin: 14px 0 0;
  font-size: 13px;
  color: #8A949F;
}

.footer-bottom {
  padding-top: 16px;
  padding-bottom: 26px;
  border-top: 1px solid #2A3644;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: #8A949F;
}

/* ---------------------------------------------------------
   4. pages · 首页
   --------------------------------------------------------- */
.hero {
  padding: 52px 0 56px;
  border-bottom: 1px solid var(--rule);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
  gap: var(--gap);
  align-items: start;
}

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

.hero-kicker {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.hero-text h1 {
  margin: 0 0 16px;
  font-size: 34px;
  line-height: 1.3;
}

.hero-lead {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.index-list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.index-list li {
  display: grid;
  grid-template-columns: 44px minmax(120px, 160px) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  margin: 0;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.index-list .index-num {
  font-family: var(--font-serif);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.index-list .index-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.index-list .index-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

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

/* 首页通用 section */
.section {
  padding: 52px 0;
  border-bottom: 1px solid var(--rule);
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.section-head p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

/* 服务领域总览：4 项两列，避免孤项换行 */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.entry-card {
  padding: 20px 22px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--copper);
  border-radius: var(--radius);
}

.entry-card .entry-num {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.entry-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
}

.entry-card p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.entry-card .entry-for {
  color: var(--ink);
}

.entry-card .entry-exclude {
  padding-top: 8px;
  border-top: 1px dashed var(--rule);
  color: var(--muted);
}

.section-media {
  margin-top: 24px;
}

.section-media img {
  aspect-ratio: 21 / 9;
}

/* 合作阶段时间轴 */
.stages .section-media img {
  aspect-ratio: 21 / 9;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.timeline-item {
  margin: 0;
  padding: 18px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
}

.timeline-num {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.timeline-item h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.timeline-goal {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.timeline-party,
.timeline-output {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 准备材料与验收对照 */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.compare-col {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.compare-col h3 {
  margin: 0 0 14px;
  font-size: 18px;
}

.compare-list {
  margin: 0 0 16px;
  padding-left: 1.1em;
  font-size: 15px;
}

.compare-list li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.compare-more {
  margin: 0;
  font-size: 15px;
}

.compare-more a {
  color: var(--link);
  border-bottom: 1px solid var(--rule);
}

.compare-more a:hover {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

/* 服务方法说明 */
.method-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 44%);
  gap: var(--gap);
  align-items: start;
}

.method-text {
  min-width: 0;
}

.method-text h2 {
  margin: 0 0 14px;
  font-size: 22px;
}

.method-text p {
  font-size: 15px;
  color: var(--muted);
}

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

/* 常见问题摘要 */
.brief-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.brief-list li {
  margin: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.brief-q {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.brief-a {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 下一步任务带（首页三卡片） */
.next-steps h2 {
  font-size: 22px;
  margin-bottom: 18px;
}

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

/* ---------------------------------------------------------
   5. pages · 服务领域
   --------------------------------------------------------- */
.page-hero {
  padding-top: 28px;
  padding-bottom: 32px;
}

.page-hero .page-index {
  margin-bottom: 10px;
}

.page-hero .page-lead,
.page-hero .page-summary {
  max-width: 720px;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-hero .index-tags,
.page-hero .tag-row {
  margin-bottom: 26px;
}

.page-hero .hero-figure,
.page-hero .page-figure,
.page-hero .media-figure {
  margin-top: 6px;
}

.page-hero .hero-figure img {
  aspect-ratio: 21 / 9;
}

.direction-block {
  margin-bottom: 40px;
}

.direction-head {
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}

.direction-head h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.direction-head .entry-index {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.direction-scope {
  margin: 0;
}

.service-entry {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}

.service-entry:last-child {
  border-bottom: 0;
}

.entry-index-col {
  min-width: 0;
}

.entry-index-col .entry-index {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

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

.entry-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.entry-body > p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--muted);
}

.entry-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
  margin: 0;
  font-size: 14px;
}

.entry-facts dt {
  margin: 0 0 2px;
  font-weight: 600;
  color: var(--copper);
}

.entry-facts dd {
  margin: 0 0 8px;
  line-height: 1.7;
  color: var(--muted);
}

.combine-block {
  margin-top: 12px;
  padding: 24px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.combine-block h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.combine-block > p {
  font-size: 15px;
  color: var(--muted);
}

.combine-list {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: combine;
}

.combine-list li {
  margin: 0 0 14px;
  padding-left: 34px;
  position: relative;
  counter-increment: combine;
}

.combine-list li::before {
  content: counter(combine, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.combine-list h3 {
  margin: 0 0 4px;
  font-size: 17px;
}

.combine-list p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------------------------------------------------
   6. pages · 合作阶段
   --------------------------------------------------------- */
.page-head {
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--rule);
}

.page-head .page-index,
.page-head .page-lead {
  max-width: 760px;
}

.page-head .page-lead {
  margin: 0 0 16px;
  font-size: 16px;
  color: var(--muted);
}

.page-head .tag-row {
  margin-top: 4px;
}

.delivery-stages .page-layout,
.page-delivery-stages .page-layout {
  padding-top: 28px;
}

.page-figure {
  margin: 22px 0 30px;
}

.page-figure img {
  aspect-ratio: 21 / 9;
}

.stage-block {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}

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

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

.stage-head .stage-no {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.stage-head h2 {
  margin: 0;
  font-size: 22px;
}

.stage-block > p {
  font-size: 15px;
  color: var(--muted);
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 18px 0;
}

.stage-cell {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.stage-cell h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--copper);
}

.stage-cell .check-list {
  font-size: 14px;
  color: var(--ink);
}

.stage-gate {
  margin: 0;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--surface);
  border-left: 3px solid var(--copper);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.gate-label {
  font-weight: 600;
  color: var(--copper);
  margin-right: 6px;
}

.stage-timing {
  padding-top: 8px;
}

.stage-timing h2 {
  font-size: 22px;
}

.stage-timing > p {
  font-size: 15px;
  color: var(--muted);
}

/* ---------------------------------------------------------
   7. pages · 准备材料
   --------------------------------------------------------- */
.page-materials-checklist .page-hero {
  padding-bottom: 26px;
}

.content-block {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}

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

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

.content-block > p {
  font-size: 15px;
  color: var(--muted);
}

.note-item {
  padding: 16px 18px;
  margin-bottom: 14px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.note-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.note-item p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------------------------------------------------
   8. pages · 验收说明
   --------------------------------------------------------- */
.content-section {
  padding-bottom: 30px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--rule);
}

.content-section:last-of-type {
  border-bottom: 0;
}

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

.checklist-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.checklist-group {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
}

.checklist-group h3 {
  margin: 0 0 12px;
  font-size: 17px;
}

.dual-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.column-block {
  min-width: 0;
  padding: 20px 22px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.column-block h3 {
  margin: 0 0 12px;
  font-size: 17px;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.flow-steps li {
  margin: 0;
  padding: 18px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  counter-increment: flow;
}

.flow-steps li h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.flow-steps li h3::before {
  content: counter(flow, decimal-leading-zero);
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.flow-steps li p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------------------------------------------------
   9. pages · 常见问题
   --------------------------------------------------------- */
.qa-visual {
  padding-top: 4px;
  padding-bottom: 24px;
}

.qa-visual .media-figure img {
  aspect-ratio: 21 / 9;
}

.qa-group {
  padding-bottom: 26px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--rule);
}

.qa-group:last-of-type {
  border-bottom: 0;
}

.group-head {
  margin-bottom: 16px;
}

.group-head .group-index {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.group-head h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.group-intro {
  margin: 0;
}

.qa-item {
  margin-bottom: 10px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.qa-item summary {
  position: relative;
  padding: 14px 44px 14px 18px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.qa-item summary::-webkit-details-marker {
  display: none;
}

.qa-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 18px;
  color: var(--copper);
}

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

.qa-item summary:hover {
  color: var(--copper);
}

.qa-body {
  padding: 0 18px 16px;
  border-top: 1px dashed var(--rule);
}

.qa-body p {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--muted);
}

.qa-body .qa-related {
  color: var(--ink);
}

.qa-body .qa-related a {
  color: var(--link);
  border-bottom: 1px solid var(--rule);
}

.qa-body .qa-related a:hover {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

/* ---------------------------------------------------------
   10. pages · 服务方法
   --------------------------------------------------------- */
.method-block {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}

.method-block:last-of-type {
  border-bottom: 0;
}

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

.method-block > p {
  font-size: 15px;
  color: var(--muted);
}

.method-figure {
  margin-top: 8px;
}

.method-figure img {
  aspect-ratio: 21 / 9;
}

/* ---------------------------------------------------------
   11. pages · 合作洽谈
   --------------------------------------------------------- */
.page-head-inner {
  display: block;
}

.topic-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: topic;
}

.topic-item {
  position: relative;
  padding: 18px 0 18px 62px;
  margin: 0;
  border-bottom: 1px solid var(--rule);
  counter-increment: topic;
}

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

.topic-item .topic-num {
  position: absolute;
  left: 0;
  top: 20px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.topic-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.topic-item > p {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--muted);
}

.topic-prep {
  font-size: 14px;
  color: var(--ink);
}

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

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

.reading-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.reading-item p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.change-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.change-note {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.change-note h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.change-note p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.confirm-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: confirm;
}

.confirm-steps li {
  position: relative;
  padding: 8px 0 8px 40px;
  margin: 0;
  font-size: 15px;
  border-bottom: 1px dashed var(--rule);
  counter-increment: confirm;
}

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

.confirm-steps .step-num {
  position: absolute;
  left: 0;
  top: 8px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

/* ---------------------------------------------------------
   12. pages · 404
   --------------------------------------------------------- */
.error-main {
  padding: 64px 0 72px;
}

.error-inner {
  max-width: 720px;
  text-align: left;
}

.error-code {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--copper);
}

.error-inner h1 {
  margin: 0 0 14px;
  font-size: 30px;
}

.error-lead {
  margin: 0 0 24px;
  font-size: 16px;
  color: var(--muted);
}

.error-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.error-links li {
  margin: 0;
}

.error-links a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--ink);
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.error-links a:hover {
  color: var(--copper);
  border-color: var(--copper);
}

.error-note {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------------------------------------------------------
   13. responsive · 断点
   --------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --gap: 32px;
  }

  .header-extra a:not(.header-cta) {
    display: none;
  }

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

  .hero-media {
    order: 2;
  }

  .hero-text {
    order: 1;
  }

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

  .side-column,
  .content-side,
  .content-aside,
  .page-aside,
  .layout-sidebar {
    border-top: 1px solid var(--rule);
    padding-top: 24px;
  }

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

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  body.site-body {
    font-size: 15px;
  }

  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .inner-main > .breadcrumb {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: block;
    order: 3;
    margin-left: auto;
  }

  .header-extra {
    order: 2;
  }

  .header-extra a.header-cta {
    padding: 8px 14px;
    font-size: 14px;
  }

  .hero {
    padding: 36px 0 40px;
  }

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

  .index-list li {
    grid-template-columns: 40px minmax(0, 1fr);
    row-gap: 4px;
  }

  .index-list .index-desc {
    grid-column: 2 / 3;
  }

  .section {
    padding: 38px 0;
  }

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

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

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

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

  .method-media {
    order: 1;
  }

  .method-text {
    order: 2;
  }

  .next-list,
  .task-band,
  .next-grid,
  .reading-list,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

  .checklist-groups,
  .dual-column,
  .change-notes {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .service-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .entry-facts {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

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

  .section-head h2,
  .section h2,
  .content-block h2,
  .content-section h2,
  .method-block h2,
  .stage-head h2,
  .stage-timing h2,
  .group-head h2,
  .combine-block h2,
  .method-text h2,
  .next-band h2,
  .next-tasks h2,
  .next-steps h2 {
    font-size: 19px;
  }

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

  .topic-item {
    padding-left: 46px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 34px;
  }
}

@media (max-width: 480px) {
  .header-extra {
    gap: 10px;
  }

  .header-extra a.header-cta {
    padding: 7px 12px;
  }

  .brand {
    font-size: 18px;
  }

  .hero-text h1 {
    font-size: 22px;
  }

  .btn {
    width: 100%;
  }

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

  .data-table {
    min-width: 460px;
  }
}

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

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}