/* ============================================================
   base / reset
   ============================================================ */
*, *::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", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #333333;
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #1F2A37;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #EA580C;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: #1F2A37;
  line-height: 1.4;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 16px;
}

strong {
  font-weight: 600;
}

/* ============================================================
   layout / shell
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #FFFFFF;
}

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

.inner-main {
  padding-bottom: 64px;
}

.site-header {
  background: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  font-size: 20px;
  font-weight: 600;
  color: #1F2A37;
  letter-spacing: 0.01em;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.brand-logo:hover {
  color: #1F2A37;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav .nav-link {
  font-size: 15px;
  color: #333333;
  padding: 8px 2px;
  position: relative;
  display: inline-block;
  line-height: 1.6;
}

.main-nav .nav-link:hover {
  color: #EA580C;
}

.main-nav .nav-link.is-current {
  color: #1F2A37;
  font-weight: 600;
}

.main-nav .nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: #EA580C;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #1F2A37;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-footer {
  background: #F2F6FA;
  border-top: 1px solid #E5E7EB;
  margin-top: auto;
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 2fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  max-width: 360px;
}

.footer-nav-title {
  font-size: 15px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 12px;
}

.footer-nav ul {
  display: grid;
  gap: 8px;
}

.footer-nav a {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.6;
}

.footer-nav a:hover {
  color: #EA580C;
}

.footer-boundary-title {
  font-size: 15px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 12px;
}

.footer-boundary p:last-child {
  font-size: 13px;
  color: #6B7280;
  line-height: 1.7;
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid #E5E7EB;
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 0;
}

/* ============================================================
   components / shared
   ============================================================ */
.quote-box {
  background: #F2F6FA;
  border-left: 3px solid #EA580C;
  padding: 20px 24px;
  margin: 24px 0;
}

.quote-box p {
  font-size: 16px;
  line-height: 1.8;
  color: #1F2A37;
  margin-bottom: 0;
}

.content-figure {
  margin: 32px 0;
}

.content-figure img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.content-figure figcaption {
  font-size: 13px;
  color: #6B7280;
  text-align: center;
  margin-top: 10px;
  line-height: 1.6;
}

.table-wrapper,
.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

.data-table,
.standard-table,
.report-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.7;
}

.data-table th,
.data-table td,
.standard-table th,
.standard-table td,
.report-table th,
.report-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #E5E7EB;
  vertical-align: top;
}

.data-table thead th,
.standard-table thead th,
.report-table thead th {
  background: #1F2A37;
  color: #FFFFFF;
  font-weight: 600;
  font-size: 14px;
}

.data-table tbody tr:nth-child(even),
.standard-table tbody tr:nth-child(even),
.report-table tbody tr:nth-child(even) {
  background: #F9FAFB;
}

/* breadcrumb */
.breadcrumb {
  max-width: 1140px;
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 14px;
  color: #6B7280;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: #6B7280;
}

.breadcrumb a:hover {
  color: #EA580C;
}

.breadcrumb-sep {
  color: #9CA3AF;
}

.breadcrumb-current {
  color: #1F2A37;
  font-weight: 500;
}

/* page header */
.page-header {
  max-width: 1140px;
  margin: 0 auto;
  padding: 24px 24px 8px;
}

.page-title {
  font-size: 28px;
  line-height: 1.4;
  color: #1F2A37;
  margin-bottom: 0;
}

.page-title-area,
.page-title-block {
  max-width: 820px;
  margin: 0 auto;
  padding: 16px 24px 0;
}

.page-lead,
.page-title-desc {
  font-size: 17px;
  line-height: 1.8;
  color: #4B5563;
  margin-bottom: 0;
}

/* related links */
.related-links,
.related-links-block {
  max-width: 820px;
  margin: 48px auto 0;
  padding: 0 24px;
}

.related-links h2,
.related-title,
.related-links-title {
  font-size: 18px;
  color: #1F2A37;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #E5E7EB;
}

.related-list,
.related-links-list {
  display: grid;
  gap: 10px;
}

.related-list a,
.related-links-list a {
  font-size: 15px;
  color: #1F2A37;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1.6;
}

.related-list a::before,
.related-links-list a::before {
  content: "→";
  color: #EA580C;
  font-size: 14px;
}

.related-list a:hover,
.related-links-list a:hover {
  color: #EA580C;
}

/* FAQ item */
.faq-item {
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  margin-bottom: 12px;
  background: #FFFFFF;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 500;
  color: #1F2A37;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  line-height: 1.6;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: #EA580C;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid #E5E7EB;
}

.faq-answer {
  padding: 16px 20px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: #4B5563;
  margin-bottom: 12px;
}

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

.faq-answer a {
  color: #EA580C;
  font-weight: 500;
}

/* ============================================================
   components / home page
   ============================================================ */
.home-main {
  background: #FFFFFF;
}

/* hero */
.hero-section {
  background: #F2F6FA;
  border-bottom: 1px solid #E5E7EB;
}

.hero-layout {
  max-width: 1140px;
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.hero-content h1 {
  font-size: 30px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 17px;
  color: #4B5563;
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-problems {
  display: grid;
  gap: 16px;
}

.problem-item {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-left: 3px solid #EA580C;
  border-radius: 6px;
  padding: 16px 20px;
}

.problem-item h2 {
  font-size: 16px;
  margin-bottom: 6px;
}

.problem-item p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 8px;
}

.problem-item a {
  font-size: 14px;
  color: #EA580C;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.problem-item a::after {
  content: "→";
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-figure {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 8px;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

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

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  line-height: 1.5;
  min-height: 44px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.cta-primary {
  background: #1F2A37;
  color: #FFFFFF;
  border: 1px solid #1F2A37;
}

.cta-primary:hover {
  background: #EA580C;
  border-color: #EA580C;
  color: #FFFFFF;
}

.cta-secondary {
  background: #FFFFFF;
  color: #1F2A37;
  border: 1px solid #1F2A37;
}

.cta-secondary:hover {
  border-color: #EA580C;
  color: #EA580C;
}

/* position section */
.position-section {
  padding: 56px 0 0;
}

.position-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.position-inner h2 {
  margin-bottom: 20px;
}

.position-inner p {
  font-size: 16px;
  line-height: 1.8;
  color: #333333;
  margin-bottom: 16px;
}

/* services section */
.services-section {
  padding: 56px 0;
}

.services-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.services-inner h2 {
  margin-bottom: 8px;
}

.section-intro {
  font-size: 16px;
  color: #4B5563;
  margin-bottom: 28px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  border-color: #EA580C;
  box-shadow: 0 2px 8px rgba(31, 42, 55, 0.08);
}

.service-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 14px;
  flex-grow: 1;
}

.service-card ul {
  margin-bottom: 14px;
  display: grid;
  gap: 6px;
}

.service-card ul li {
  font-size: 13px;
  color: #6B7280;
  line-height: 1.6;
  padding-left: 14px;
  position: relative;
}

.service-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: #EA580C;
  border-radius: 50%;
}

.service-card a {
  font-size: 14px;
  color: #EA580C;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-card a::after {
  content: "→";
}

/* method preview */
.method-preview-section {
  background: #F2F6FA;
  border-top: 1px solid #E5E7EB;
  border-bottom: 1px solid #E5E7EB;
  padding: 56px 0;
}

.method-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.method-inner h2 {
  margin-bottom: 8px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.method-step {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 20px;
  transition: border-color 0.2s ease;
}

.method-step:hover {
  border-color: #EA580C;
}

.method-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: #1F2A37;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 12px;
}

.method-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.method-step p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 10px;
}

.method-step a {
  font-size: 14px;
  color: #EA580C;
  font-weight: 500;
}

.method-step a::after {
  content: "→";
  margin-left: 4px;
}

.method-figure {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 8px;
}

.method-figure img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.method-figure figcaption {
  font-size: 13px;
  color: #6B7280;
  text-align: center;
  padding: 10px 0 4px;
  line-height: 1.6;
}

/* quality preview */
.quality-preview-section {
  padding: 56px 0;
}

.quality-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.quality-inner h2 {
  margin-bottom: 20px;
}

.quality-list {
  margin-top: 24px;
}

.quality-item {
  border-bottom: 1px solid #E5E7EB;
  padding: 16px 0;
}

.quality-item dt {
  font-size: 16px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 4px;
}

.quality-item dd {
  font-size: 15px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 8px;
}

.quality-item a {
  font-size: 14px;
  color: #EA580C;
  font-weight: 500;
}

.quality-item a::after {
  content: "→";
  margin-left: 4px;
}

/* process section */
.process-section {
  background: #F2F6FA;
  border-top: 1px solid #E5E7EB;
  border-bottom: 1px solid #E5E7EB;
  padding: 56px 0;
}

.process-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.process-inner h2 {
  margin-bottom: 8px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-step {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 20px;
  position: relative;
}

.process-step .process-phase {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #EA580C;
  background: #FFF7ED;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.process-step .process-period {
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 8px;
}

.process-step .process-deliverable {
  font-size: 13px;
  color: #1F2A37;
  background: #F2F6FA;
  border-radius: 4px;
  padding: 8px 10px;
  margin-bottom: 0;
}

/* FAQ preview */
.faq-preview-section {
  padding: 56px 0;
}

.faq-preview-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.faq-preview-inner h2 {
  margin-bottom: 20px;
}

.faq-preview-list {
  display: grid;
  gap: 12px;
}

.faq-preview-list .faq-item summary {
  font-size: 15px;
}

.faq-preview-list .faq-item p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 8px;
}

.faq-preview-list .faq-item a {
  font-size: 14px;
  color: #EA580C;
  font-weight: 500;
}

.faq-preview-list .faq-item a::after {
  content: "→";
  margin-left: 4px;
}

/* contact section */
.contact-section {
  background: #F2F6FA;
  border-top: 1px solid #E5E7EB;
  padding: 56px 0;
}

.contact-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.contact-inner h2 {
  margin-bottom: 12px;
}

.contact-inner p {
  font-size: 16px;
  color: #4B5563;
  line-height: 1.8;
  margin-bottom: 24px;
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid #1F2A37;
  min-height: 44px;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.contact-link::after {
  content: "→";
  margin-left: 6px;
}

.contact-link:hover {
  border-color: #EA580C;
  color: #EA580C;
}

/* ============================================================
   components / inner pages
   ============================================================ */
.inner-container,
.container,
.article-shell {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.article-content p {
  margin-bottom: 16px;
}

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

/* core capabilities */
.capability-list {
  margin: 20px 0;
}

.capability-item {
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 16px;
}

.capability-item dt {
  font-size: 17px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 8px;
}

.capability-item dd {
  font-size: 15px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 0;
}

/* method page */
.method-intro {
  margin-bottom: 32px;
}

.method-intro p {
  font-size: 16px;
  line-height: 1.8;
}

.method-flow {
  margin-bottom: 40px;
}

.method-flow h2 {
  margin-bottom: 20px;
}

.flow-node {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  border-left: 2px solid #E5E7EB;
  padding: 0 0 24px 24px;
  position: relative;
}

.flow-node:last-child {
  padding-bottom: 0;
}

.flow-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: #EA580C;
  border-radius: 50%;
}

.flow-node .node-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: #1F2A37;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
}

.flow-node .node-content h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.node-detail {
  display: grid;
  gap: 6px;
}

.node-detail div {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
}

.node-detail dt {
  font-size: 13px;
  font-weight: 600;
  color: #EA580C;
}

.node-detail dd {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
}

.method-boundary {
  margin-bottom: 40px;
}

.method-boundary h2 {
  margin-bottom: 16px;
}

.method-boundary h3 {
  font-size: 17px;
  margin-top: 20px;
  margin-bottom: 8px;
}

.method-boundary p {
  font-size: 15px;
  line-height: 1.8;
  color: #4B5563;
}

.method-quote {
  background: #F2F6FA;
  border-left: 3px solid #EA580C;
  padding: 16px 20px;
  margin: 20px 0 0;
}

.method-quote p {
  font-size: 15px;
  color: #1F2A37;
  margin-bottom: 0;
}

.report-structure {
  margin-bottom: 40px;
}

.report-structure h2 {
  margin-bottom: 12px;
}

.report-structure p {
  font-size: 15px;
  color: #4B5563;
}

/* quality page */
.quality-node-section {
  margin-bottom: 40px;
}

.quality-node-section h2 {
  margin-bottom: 12px;
}

.quality-node-list {
  margin-top: 24px;
}

.quality-node-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  border-left: 2px solid #E5E7EB;
  padding: 0 0 24px 24px;
  position: relative;
}

.quality-node-item:last-child {
  padding-bottom: 0;
}

.quality-node-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: #EA580C;
  border-radius: 50%;
}

.quality-node-item .node-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: #1F2A37;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
}

.quality-node-item .node-body h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.node-control {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 4px;
}

.node-role {
  font-size: 13px;
  color: #6B7280;
}

.review-mechanism-section {
  margin-bottom: 40px;
}

.review-mechanism-section h2 {
  margin-bottom: 12px;
}

.review-mechanism-section p {
  font-size: 15px;
  color: #4B5563;
}

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

.term-item {
  border-bottom: 1px solid #E5E7EB;
  padding: 12px 0;
}

.term-item dt {
  font-size: 15px;
  font-weight: 600;
  color: #1F2A37;
  margin-bottom: 4px;
}

.term-item dd {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
}

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

.acceptance-section h2 {
  margin-bottom: 12px;
}

.acceptance-section p {
  font-size: 15px;
  color: #4B5563;
}

/* team page */
.roles-section {
  margin-bottom: 40px;
}

.roles-section h2 {
  margin-bottom: 8px;
}

.role-list {
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

.role-item {
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  padding: 20px;
}

.role-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.role-header h3 {
  font-size: 17px;
  margin-bottom: 0;
}

.role-tag {
  font-size: 12px;
  font-weight: 500;
  color: #EA580C;
  background: #FFF7ED;
  padding: 2px 8px;
  border-radius: 4px;
}

.role-desc {
  font-size: 15px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 8px;
}

.role-collab {
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 0;
}

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

.collaboration-section h2 {
  margin-bottom: 8px;
}

.communication-node-list {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.node-item {
  background: #F9FAFB;
  border-left: 3px solid #1F2A37;
  border-radius: 4px;
  padding: 16px 20px;
}

.node-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.node-item p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 0;
}

.section-note {
  font-size: 14px;
  color: #6B7280;
  margin-top: 16px;
}

.contact-path-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* faq page */
.faq-content {
  padding-top: 24px;
}

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

.faq-group h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.faq-group-intro {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 16px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

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

.faq-path h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.faq-path p {
  font-size: 15px;
  color: #4B5563;
}

.faq-path-figure {
  margin: 20px 0;
}

.faq-path-figure img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.faq-path-figure figcaption {
  font-size: 13px;
  color: #6B7280;
  text-align: center;
  margin-top: 8px;
}

.faq-entry-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.entry-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid #1F2A37;
  min-height: 44px;
}

.entry-link::after {
  content: "→";
  margin-left: 6px;
}

.entry-link:hover {
  border-color: #EA580C;
  color: #EA580C;
}

/* ============================================================
   pages / 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-content {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: #1F2A37;
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: #4B5563;
  margin-bottom: 24px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  background: #1F2A37;
  color: #FFFFFF;
  border-radius: 6px;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.error-link:hover {
  background: #EA580C;
  color: #FFFFFF;
}

/* ============================================================
   responsive
   ============================================================ */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

  .nav-toggle {
    display: flex;
  }

  .main-nav .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    border-bottom: 1px solid #E5E7EB;
    padding: 8px 16px 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    box-shadow: 0 4px 12px rgba(31, 42, 55, 0.08);
  }

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

  .main-nav .nav-list li {
    border-bottom: 1px solid #F2F6FA;
  }

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

  .main-nav .nav-link {
    display: block;
    padding: 14px 8px;
    font-size: 16px;
    line-height: 1.5;
    min-height: 44px;
  }

  .main-nav .nav-link.is-current::after {
    display: none;
  }

  .main-nav .nav-link.is-current {
    color: #EA580C;
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-layout {
    padding: 40px 16px 32px;
  }

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

  .hero-subtitle {
    font-size: 15px;
  }

  .position-inner,
  .quality-inner,
  .faq-preview-inner,
  .contact-inner,
  .inner-container,
  .container,
  .article-shell,
  .related-links,
  .related-links-block {
    padding-left: 16px;
    padding-right: 16px;
  }

  .services-inner,
  .method-inner,
  .process-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .method-steps {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .breadcrumb {
    padding: 16px 16px 0;
  }

  .page-header {
    padding: 20px 16px 8px;
  }

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

  .page-title-area,
  .page-title-block {
    padding: 12px 16px 0;
  }

  .page-lead,
  .page-title-desc {
    font-size: 15px;
  }

  .flow-node,
  .quality-node-item {
    grid-template-columns: 40px 1fr;
    gap: 12px;
    padding-left: 16px;
  }

  .node-detail div {
    grid-template-columns: 48px 1fr;
    gap: 8px;
  }

  .role-header {
    flex-wrap: wrap;
  }

  .contact-links,
  .contact-path-links,
  .faq-entry-links {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-link,
  .entry-link {
    width: 100%;
  }

  .cta-button {
    width: 100%;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .error-code {
    font-size: 48px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 16px;
  }

  .brand-logo {
    font-size: 17px;
  }

  .hero-problems {
    gap: 12px;
  }

  .problem-item {
    padding: 14px 16px;
  }

  .service-card,
  .method-step,
  .process-step,
  .capability-item,
  .role-item {
    padding: 16px;
  }

  .quote-box {
    padding: 16px;
  }

  .data-table th,
  .data-table td,
  .standard-table th,
  .standard-table td,
  .report-table th,
  .report-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 15px;
  }

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

  .flow-node,
  .quality-node-item {
    grid-template-columns: 36px 1fr;
    gap: 10px;
    padding-left: 12px;
  }

  .node-detail div {
    grid-template-columns: 44px 1fr;
  }
}