/* ============================================================
   51cg 全站样式表
   站点：tth001.com
   设计方向：教育指南风企业站
   主色：#123C4A  强调：#E8993A  底：#F2F5F4  边框：#DCE3E0
   ============================================================ */

/* --------------------------------------------
   Base / Reset
   统一浏览器默认行为，建立字体与色彩基调
-------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #24313A;
  background-color: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: #123C4A;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #E8993A;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.4;
  color: #123C4A;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 0.75rem;
}

strong {
  font-weight: 700;
  color: #123C4A;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------
   Layout / 全站骨架
   页头、页脚、主容器、面包屑、页面标题区
-------------------------------------------- */
.site-header {
  background-color: #123C4A;
  border-bottom: 3px solid #E8993A;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.04em;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-list li a.is-current {
  color: #FFFFFF;
  background-color: rgba(232, 153, 58, 0.28);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 6px;
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-toggle:hover {
  background-color: rgba(255, 255, 255, 0.16);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
}

.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 0.8125rem;
  color: #586B74;
}

.breadcrumb a {
  color: #586B74;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #E8993A;
}

.breadcrumb-sep {
  color: #A8B4BA;
  font-size: 0.75rem;
}

.breadcrumb-current {
  color: #24313A;
  font-weight: 600;
}

.page-header {
  padding: 20px 0 32px;
}

.page-header p.page-description {
  font-size: 0.875rem;
  color: #E8993A;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.page-header h1.page-title {
  font-size: 2.125rem;
  color: #123C4A;
  margin-bottom: 10px;
  line-height: 1.3;
}

.page-header .page-header-desc,
.page-header p:last-child {
  font-size: 1rem;
  color: #586B74;
  max-width: 720px;
  margin-bottom: 0;
}

/* 页脚 */
.site-footer {
  background-color: #123C4A;
  color: rgba(255, 255, 255, 0.8);
  padding-top: 56px;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand .footer-brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.footer-brand .footer-tagline {
  font-size: 0.875rem;
  color: #E8993A;
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-brand .footer-desc {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin-bottom: 0;
}

.footer-columns h3 {
  font-size: 0.9375rem;
  color: #FFFFFF;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-columns ul li {
  margin-bottom: 8px;
}

.footer-columns ul li a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.footer-columns ul li a:hover {
  color: #E8993A;
}

.footer-note p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 0;
}

/* --------------------------------------------
   Components / 通用组件
   按钮、链接、卡片、提示框、相关入口
-------------------------------------------- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: 6px;
  min-height: 44px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #123C4A;
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: #1D5265;
  color: #FFFFFF;
}

.btn-secondary {
  background-color: transparent;
  color: #123C4A;
  border: 2px solid #123C4A;
}

.btn-secondary:hover {
  background-color: #F2F5F4;
  color: #123C4A;
  border-color: #123C4A;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: #123C4A;
  transition: color 0.2s ease, gap 0.2s ease;
}

.text-link::after {
  content: "→";
  font-size: 1rem;
  line-height: 1;
}

.text-link:hover {
  color: #E8993A;
  gap: 10px;
}

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

.section-header h2 {
  font-size: 1.625rem;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 0.9375rem;
  color: #586B74;
  max-width: 680px;
  margin-bottom: 0;
}

/* 相关入口条（首页与内页通用） */
.related-links {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid #DCE3E0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #123C4A;
  margin-right: 8px;
}

.related-links-item {
  font-size: 0.875rem;
  color: #586B74;
  padding: 6px 14px;
  border-radius: 20px;
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.related-links-item:hover {
  background-color: #E8993A;
  border-color: #E8993A;
  color: #FFFFFF;
}

/* 内页相关入口卡片 */
.related-card {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.related-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 12px;
  line-height: 1.6;
}

.related-card a {
  font-size: 0.875rem;
  font-weight: 700;
  color: #123C4A;
}

.related-card a:hover {
  color: #E8993A;
}

/* 侧栏通用 */
.sidebar-inner {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
}

.sidebar-inner h2 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #E8993A;
}

.sidebar-inner ul li {
  margin-bottom: 4px;
}

.sidebar-inner ul li a {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: #24313A;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sidebar-inner ul li a:hover {
  background-color: rgba(18, 60, 74, 0.08);
  color: #123C4A;
}

.sidebar-note {
  font-size: 0.8125rem;
  color: #586B74;
  line-height: 1.6;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid #DCE3E0;
  margin-bottom: 0;
}

/* --------------------------------------------
   Home / 首页专属模块
   业务地图首屏、业务地图区、场景速览、交付规范、帮助入口
-------------------------------------------- */
.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 首屏：业务地图双栏 */
.hero-section.map-hero {
  padding: 48px 0 56px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy .eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #E8993A;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background-color: rgba(232, 153, 58, 0.12);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.hero-copy h1 {
  font-size: 2.25rem;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 1rem;
  color: #586B74;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

/* 业务地图区 */
.map-section {
  padding: 56px 0;
  border-top: 1px solid #DCE3E0;
}

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

.domain-card {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.domain-card:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.domain-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #E8993A;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 6px;
  margin-bottom: 14px;
}

.domain-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.domain-fit {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 14px;
  line-height: 1.6;
}

.domain-points {
  margin-bottom: 18px;
}

.domain-points li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
  line-height: 1.6;
}

.domain-points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

/* 场景速览 */
.scenario-preview {
  padding: 56px 0;
  border-top: 1px solid #DCE3E0;
}

.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.scenario-card {
  display: grid;
  grid-template-columns: 48px 1.2fr 0.8fr auto;
  align-items: center;
  gap: 20px;
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 20px 24px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.scenario-card:hover {
  border-color: #123C4A;
  background-color: #FFFFFF;
}

.scenario-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #123C4A;
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50%;
}

.scenario-card h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.scenario-goal {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 0;
  line-height: 1.5;
}

.scenario-steps-count {
  font-size: 0.8125rem;
  color: #E8993A;
  font-weight: 700;
  margin-bottom: 0;
  white-space: nowrap;
}

.scenario-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  background-color: #F2F5F4;
}

.scenario-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.scenario-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

/* 交付规范区 */
.standard-section {
  padding: 56px 0;
  border-top: 1px solid #DCE3E0;
}

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

.standard-block {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
}

.standard-block h3 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #E8993A;
}

.standard-block p {
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 12px;
  color: #24313A;
}

.standard-block p strong {
  display: inline-block;
  font-size: 0.8125rem;
  color: #E8993A;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: 8px;
}

.standard-block .text-link {
  margin-top: 8px;
}

/* 帮助与入口条 */
.help-entry {
  padding: 56px 0;
  border-top: 1px solid #DCE3E0;
}

.help-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 40px;
  align-items: start;
}

.faq-teaser h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.faq-item {
  border-bottom: 1px solid #DCE3E0;
  padding: 16px 0;
}

.faq-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: #123C4A;
}

.faq-item p {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 8px;
  line-height: 1.6;
}

.faq-item .text-link {
  font-size: 0.8125rem;
}

.site-intro-card {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
}

.site-intro-card h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.site-intro-card p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.7;
  margin-bottom: 12px;
}

.site-intro-card .browse-tip {
  font-size: 0.8125rem;
  color: #E8993A;
  font-weight: 600;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid #DCE3E0;
  margin-bottom: 0;
}

/* --------------------------------------------
   Inner Pages / 内页专属布局
   service-map、scenarios、how-we-work、faq、about、sitemap
-------------------------------------------- */

/* ---------- service-map.html ---------- */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 88px;
}

.anchor-list li {
  margin-bottom: 4px;
}

.anchor-list li a {
  display: block;
  padding: 10px 14px;
  font-size: 0.875rem;
  color: #24313A;
  border-radius: 6px;
  border-left: 3px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.anchor-list li a:hover {
  background-color: rgba(18, 60, 74, 0.06);
  border-left-color: #E8993A;
  color: #123C4A;
}

.content-area {
  min-width: 0;
}

.service-map-hero {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  margin-bottom: 32px;
  background-color: #F2F5F4;
}

.service-map-hero img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.service-map-hero figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

.domain-section {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  scroll-margin-top: 88px;
}

.domain-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.domain-header .domain-number {
  margin-bottom: 0;
  flex-shrink: 0;
}

.domain-header h2 {
  font-size: 1.25rem;
}

.domain-intro {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 16px;
  line-height: 1.7;
}

.domain-work-list {
  margin-bottom: 20px;
}

.domain-work-list li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
  line-height: 1.6;
}

.domain-work-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

.domain-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  color: #123C4A;
  transition: color 0.2s ease, gap 0.2s ease;
}

.domain-link::after {
  content: "→";
  font-size: 1rem;
}

.domain-link:hover {
  color: #E8993A;
  gap: 10px;
}

.domain-boundary {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 24px;
}

.domain-boundary h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.domain-boundary p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.7;
  margin-bottom: 0;
}

.nav-relation {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
}

.nav-relation h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.nav-relation p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.7;
  margin-bottom: 0;
}

.nav-relation p a {
  font-weight: 700;
  color: #123C4A;
}

.nav-relation p a:hover {
  color: #E8993A;
}

/* service-map 内页相关入口 */
.related-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: none;
  padding: 0;
  margin-top: 40px;
}

/* ---------- scenarios.html ---------- */
.scenarios-block {
  margin-bottom: 48px;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #E8993A;
}

.scenario-intro-media {
  margin-bottom: 32px;
}

.scenario-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  background-color: #F2F5F4;
}

.scenario-figure .scenario-hero-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.scenario-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

.scenario-item {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  scroll-margin-top: 88px;
}

.scenario-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.scenario-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #E8993A;
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 6px;
  flex-shrink: 0;
}

.scenario-title-wrap .scenario-title {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.scenario-goal {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 0;
  line-height: 1.6;
}

.step-list {
  counter-reset: step-counter;
}

.step-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 20px;
  counter-increment: step-counter;
}

.step-item::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 2px;
  width: 32px;
  height: 32px;
  background-color: #123C4A;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #123C4A;
  margin-bottom: 4px;
}

.step-desc {
  font-size: 0.875rem;
  color: #24313A;
  line-height: 1.6;
  margin-bottom: 4px;
}

.step-output {
  font-size: 0.8125rem;
  color: #E8993A;
  font-weight: 600;
  margin-bottom: 0;
}

.step-output::before {
  content: "产出：";
  color: #586B74;
  font-weight: 400;
}

.scenario-entry {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #DCE3E0;
}

.scenario-entry a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: #123C4A;
}

.scenario-entry a::after {
  content: "→";
}

.scenario-entry a:hover {
  color: #E8993A;
  gap: 10px;
}

.scenario-guide {
  margin-bottom: 48px;
}

.guide-intro {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 24px;
  max-width: 680px;
}

.guide-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guide-card {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
}

.guide-card-title {
  font-size: 1rem;
  margin-bottom: 8px;
  color: #123C4A;
}

.guide-card-text {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
  margin-bottom: 0;
}

.process-boundary {
  margin-bottom: 48px;
}

.boundary-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.boundary-user,
.boundary-service {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
}

.boundary-title {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #123C4A;
  padding-bottom: 8px;
  border-bottom: 2px solid #E8993A;
}

.boundary-list li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
  line-height: 1.6;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

.boundary-note {
  font-size: 0.875rem;
  color: #586B74;
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 20px 24px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* scenarios 相关入口 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.related-title {
  font-size: 1rem;
  margin-bottom: 8px;
  color: #123C4A;
}

.related-text {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
  margin-bottom: 0;
}

/* ---------- how-we-work.html ---------- */
.workflow-media {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  margin-bottom: 40px;
  background-color: #F2F5F4;
}

.workflow-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.workflow-media figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

.workflow-timeline {
  margin-bottom: 48px;
}

.workflow-phase {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  position: relative;
}

.phase-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid #E8993A;
}

.phase-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #123C4A;
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.phase-head h3 {
  font-size: 1.25rem;
  margin-bottom: 0;
}

.phase-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.phase-body h4 {
  font-size: 0.875rem;
  color: #E8993A;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid #DCE3E0;
}

.phase-task ul li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
  line-height: 1.6;
}

.phase-task ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

.phase-divide p,
.phase-deliverable p,
.phase-check p {
  font-size: 0.875rem;
  color: #24313A;
  line-height: 1.6;
  margin-bottom: 0;
}

.checkpoint-note {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-left: 4px solid #E8993A;
  border-radius: 8px;
  padding: 24px 28px;
  margin-bottom: 48px;
}

.checkpoint-note h2 {
  font-size: 1.125rem;
  margin-bottom: 10px;
}

.checkpoint-note p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.7;
  margin-bottom: 0;
}

.preparation-tips {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 48px;
}

.preparation-tips h2 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.preparation-tips > p {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 20px;
}

.prep-list {
  margin-bottom: 20px;
}

.prep-list li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 28px;
  position: relative;
  margin-bottom: 10px;
  line-height: 1.6;
  counter-increment: prep-counter;
}

.prep-list {
  counter-reset: prep-counter;
}

.prep-list li::before {
  content: counter(prep-counter);
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  background-color: #E8993A;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.prep-list li strong {
  color: #123C4A;
}

.preparation-tips > p:last-child {
  font-size: 0.8125rem;
  color: #E8993A;
  font-weight: 600;
  margin-bottom: 0;
}

/* how-we-work 相关入口 */
.related-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: none;
  padding: 0;
  margin-top: 40px;
}

.related-link {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-link:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.related-link-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #123C4A;
  margin-bottom: 8px;
}

.related-link-desc {
  display: block;
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
}

/* ---------- faq.html ---------- */
.faq-category-nav {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.faq-category-nav h2 {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 12px;
  font-weight: 600;
}

.category-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.category-link {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #123C4A;
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.category-link:hover {
  background-color: #123C4A;
  border-color: #123C4A;
  color: #FFFFFF;
}

.page-layout.layout-left-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.faq-main-content {
  min-width: 0;
}

.faq-main-content .breadcrumb {
  padding-top: 0;
}

.faq-group {
  margin-bottom: 40px;
}

.faq-group h2 {
  font-size: 1.25rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 700;
  color: #123C4A;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: #E8993A;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

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

.faq-item summary:hover {
  background-color: rgba(18, 60, 74, 0.04);
}

.faq-answer {
  padding: 0 24px 20px;
  border-top: 1px solid #DCE3E0;
  padding-top: 16px;
}

.faq-answer p {
  font-size: 0.875rem;
  color: #24313A;
  line-height: 1.7;
  margin-bottom: 10px;
}

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

.faq-answer p a {
  font-weight: 700;
  color: #123C4A;
}

.faq-answer p a:hover {
  color: #E8993A;
}

.faq-sidebar {
  position: sticky;
  top: 88px;
}

.help-link-list li {
  margin-bottom: 4px;
}

.help-link-list li a {
  display: block;
  padding: 10px 14px;
  font-size: 0.875rem;
  color: #24313A;
  border-radius: 6px;
  border-left: 3px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.help-link-list li a:hover {
  background-color: rgba(18, 60, 74, 0.06);
  border-left-color: #E8993A;
  color: #123C4A;
}

.sidebar-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  margin-top: 20px;
  background-color: #FFFFFF;
}

.sidebar-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.sidebar-figure figcaption {
  padding: 10px 12px;
  font-size: 0.75rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

.help-guide-bar {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
  margin: 40px 0;
}

.help-guide-bar h2 {
  font-size: 1.125rem;
  margin-bottom: 10px;
}

.help-guide-bar > p {
  font-size: 0.875rem;
  color: #586B74;
  margin-bottom: 16px;
}

.guide-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-link-list a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #123C4A;
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.guide-link-list a:hover {
  background-color: #123C4A;
  color: #FFFFFF;
}

.related-entry-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 40px;
}

.entry-card {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-card:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.entry-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #123C4A;
  margin-bottom: 8px;
}

.entry-desc {
  display: block;
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
}

/* faq 页底部相关链接（横向条） */
.related-links {
  display: flex;
  border-top: 1px solid #DCE3E0;
  padding: 24px 0;
  margin-top: 0;
}

/* ---------- about.html ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 48px;
}

.about-intro-content h2 {
  font-size: 1.25rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.about-intro-content p {
  font-size: 0.9375rem;
  color: #24313A;
  line-height: 1.75;
  margin-bottom: 12px;
}

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

.audience-list li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
  line-height: 1.6;
}

.audience-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

.about-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  background-color: #F2F5F4;
}

.about-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.about-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

.about-boundaries {
  margin-bottom: 48px;
}

.about-boundaries h2 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.boundaries-lead {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 24px;
  max-width: 680px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.boundary-col {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
}

.boundary-col h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #123C4A;
  padding-bottom: 8px;
  border-bottom: 2px solid #E8993A;
}

.boundary-col ul li {
  font-size: 0.875rem;
  color: #24313A;
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
  line-height: 1.6;
}

.boundary-col ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: #E8993A;
  border-radius: 50%;
}

.about-sections {
  margin-bottom: 48px;
}

.about-sections h2 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.sections-lead {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 24px;
  max-width: 680px;
}

.section-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.section-item {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.section-item:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.section-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.section-item p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
  margin-bottom: 12px;
}

.section-item a {
  font-size: 0.875rem;
  font-weight: 700;
  color: #123C4A;
}

.section-item a:hover {
  color: #E8993A;
}

.browse-tip {
  margin-bottom: 48px;
}

.tip-box {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-left: 4px solid #E8993A;
  border-radius: 8px;
  padding: 28px;
}

.tip-box h2 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.tip-box p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.7;
  margin-bottom: 8px;
}

.tip-box p a {
  font-weight: 700;
  color: #123C4A;
}

.tip-box p a:hover {
  color: #E8993A;
}

/* about 相关入口 */
.related-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  border-top: none;
  padding: 0;
  margin-top: 0;
}

.related-item {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-item:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.related-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.related-item p {
  font-size: 0.875rem;
  color: #586B74;
  line-height: 1.6;
  margin-bottom: 12px;
}

.related-item a {
  font-size: 0.875rem;
  font-weight: 700;
  color: #123C4A;
}

.related-item a:hover {
  color: #E8993A;
}

/* ---------- sitemap.html ---------- */
.sitemap-section {
  margin-bottom: 48px;
}

.sitemap-section .section-title {
  font-size: 1.25rem;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.sitemap-group {
  background-color: #FFFFFF;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 20px;
}

.sitemap-group-title {
  font-size: 1rem;
  margin-bottom: 16px;
  color: #123C4A;
  padding-bottom: 8px;
  border-bottom: 1px solid #DCE3E0;
}

.sitemap-list li {
  padding: 10px 0;
  border-bottom: 1px solid #F2F5F4;
}

.sitemap-list li:last-child {
  border-bottom: none;
}

.sitemap-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: #123C4A;
  margin-bottom: 2px;
}

.sitemap-link:hover {
  color: #E8993A;
}

.sitemap-desc {
  font-size: 0.8125rem;
  color: #586B74;
  line-height: 1.6;
  margin-bottom: 0;
}

.sitemap-guide {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 48px;
}

.sitemap-guide .section-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid #E8993A;
}

.guide-lead {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 20px;
  max-width: 680px;
}

.guide-steps {
  margin-bottom: 24px;
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 0;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #123C4A;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.step-text {
  font-size: 0.875rem;
  color: #24313A;
  line-height: 1.6;
  margin-bottom: 0;
  padding-top: 4px;
}

.sitemap-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #DCE3E0;
  background-color: #FFFFFF;
}

.sitemap-figure .sitemap-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.sitemap-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: #586B74;
  background-color: #FFFFFF;
  border-top: 1px solid #DCE3E0;
}

/* sitemap 相关入口（横向条） */
.related-links {
  display: flex;
  border-top: 1px solid #DCE3E0;
  padding: 24px 0;
  margin-top: 0;
}

.related-link {
  background-color: #F2F5F4;
  border: 1px solid #DCE3E0;
  border-radius: 8px;
  padding: 20px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-link:hover {
  border-color: #123C4A;
  box-shadow: 0 4px 16px rgba(18, 60, 74, 0.08);
}

.related-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: #123C4A;
  margin-bottom: 6px;
}

.related-desc {
  display: block;
  font-size: 0.8125rem;
  color: #586B74;
  line-height: 1.6;
}

/* --------------------------------------------
   404 / 错误页
-------------------------------------------- */
.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-content {
  max-width: 560px;
  text-align: center;
}

.error-code {
  font-size: 4.5rem;
  font-weight: 700;
  color: #E8993A;
  line-height: 1.2;
  margin-bottom: 12px;
}

.error-content h1 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 1rem;
  color: #586B74;
  margin-bottom: 12px;
}

.error-suggest {
  font-size: 0.9375rem;
  color: #586B74;
  margin-bottom: 28px;
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* --------------------------------------------
   Responsive / 响应式
   1024px、768px、480px 断点
-------------------------------------------- */
@media (max-width: 1024px) {
  .hero-layout {
    gap: 32px;
  }

  .hero-copy h1 {
    font-size: 1.875rem;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 240px 1fr;
    gap: 28px;
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-layout.layout-left-sidebar {
    grid-template-columns: 1fr 260px;
    gap: 28px;
  }

  .phase-body {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #123C4A;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 4px;
  }

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

  .nav-list li a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: 6px;
  }

  .site-main.inner-main {
    padding: 0 16px 48px;
  }

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding: 16px 0 24px;
  }

  .page-header h1.page-title {
    font-size: 1.625rem;
  }

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

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-copy h1 {
    font-size: 1.625rem;
  }

  .hero-figure img {
    height: 220px;
  }

  .domain-grid {
    grid-template-columns: 1fr;
  }

  .scenario-card {
    grid-template-columns: 40px 1fr;
    gap: 12px;
    padding: 16px;
  }

  .scenario-steps-count {
    grid-column: 2;
    margin-top: -8px;
  }

  .scenario-card .text-link {
    grid-column: 2;
  }

  .standard-grid {
    grid-template-columns: 1fr;
  }

  .help-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar {
    position: static;
  }

  .sidebar-inner {
    padding: 20px;
  }

  .anchor-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }

  .page-layout.layout-left-sidebar {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .faq-sidebar {
    position: static;
  }

  .related-grid,
  .related-links {
    grid-template-columns: 1fr;
  }

  .related-links {
    display: grid;
    gap: 16px;
    padding: 24px 0;
  }

  .related-entry-bar {
    grid-template-columns: 1fr;
  }

  .boundary-block {
    grid-template-columns: 1fr;
  }

  .boundary-columns {
    grid-template-columns: 1fr;
  }

  .section-list {
    grid-template-columns: 1fr;
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .guide-cards {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

  .error-main {
    padding: 48px 16px;
  }

  .error-code {
    font-size: 3rem;
  }

  .scenario-item,
  .workflow-phase {
    padding: 24px;
  }

  .step-item {
    padding-left: 44px;
  }

  .step-item::before {
    width: 28px;
    height: 28px;
    font-size: 0.8125rem;
  }

  .scenario-head {
    gap: 12px;
  }

  .phase-head {
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .brand-tag {
    display: none;
  }

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }

  .domain-card,
  .standard-block {
    padding: 20px;
  }

  .scenario-card {
    grid-template-columns: 36px 1fr;
    gap: 10px;
    padding: 14px;
  }

  .scenario-index {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }

  .scenario-card h3 {
    font-size: 1rem;
  }

  .anchor-list {
    grid-template-columns: 1fr;
  }

  .domain-section {
    padding: 24px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 0.9375rem;
  }

  .faq-answer {
    padding: 0 16px 16px;
    padding-top: 12px;
  }

  .step-list {
    padding-left: 0;
  }

  .step-item {
    padding-left: 40px;
  }

  .step-item::before {
    width: 26px;
    height: 26px;
    font-size: 0.75rem;
  }

  .scenario-head {
    flex-direction: column;
    gap: 8px;
  }

  .scenario-number {
    width: 36px;
    height: 36px;
    font-size: 0.9375rem;
  }

  .phase-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .phase-number {
    width: 36px;
    height: 36px;
    font-size: 0.9375rem;
  }

  .sitemap-group {
    padding: 20px;
  }

  .sitemap-guide {
    padding: 24px;
  }

  .guide-step {
    gap: 12px;
  }

  .step-num {
    width: 28px;
    height: 28px;
    font-size: 0.8125rem;
  }

  .category-link-list {
    flex-direction: column;
    align-items: stretch;
  }

  .category-link {
    text-align: center;
  }

  .guide-link-list {
    flex-direction: column;
    align-items: stretch;
  }

  .guide-link-list a {
    text-align: center;
  }

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

  .error-actions .btn-primary,
  .error-actions .btn-secondary {
    width: 100%;
  }
}