/* ==========================================================================
   base 基础层
   ========================================================================== */

/* Reset 与全局基础 */
*,
*::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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #333333;
  background-color: #F7F5F2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #1E3A5F;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #F4A261;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  color: #1E3A5F;
  line-height: 1.35;
}

h1 {
  font-size: 32px;
  font-weight: 700;
}

h2 {
  font-size: 24px;
  font-weight: 700;
}

h3 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: 12px;
}

/* ==========================================================================
   layout 布局层
   ========================================================================== */

/* 全站容器 */
.header-inner,
.footer-inner,
.hero-content,
.hero-figure,
.section-header,
.matrix-grid,
.scenario-grid,
.process-steps,
.faq-list,
.boundary-content,
.page-header,
.page-title-inner,
.filter-bar-inner,
.service-list-inner,
.support-cta-inner,
.related-links,
.process-overview,
.process-detail,
.cooperation-notes,
.faq-categories,
.faq-image-section,
.support-link-card,
.support-scope,
.help-docs,
.status-section,
.feedback-section,
.page-title-area,
.page-title-block {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   components 组件层
   ========================================================================== */

/* ---------- 页头 ---------- */
.site-header {
  background-color: #1E3A5F;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: 8px;
  padding-bottom: 8px;
  gap: 24px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 1px;
  line-height: 1.2;
}

.brand-tagline {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.3;
}

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

.nav-list .nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list .nav-link:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-list .nav-link.is-current {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.16);
  font-weight: 600;
}

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

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: #1E3A5F;
  color: rgba(255, 255, 255, 0.8);
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 14px;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
  color: #F4A261;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 16px;
  padding-bottom: 16px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0;
}

/* ---------- 按钮 ---------- */
.btn-primary,
.btn-secondary,
.cta-button,
.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease,
    transform 0.2s ease;
  border: none;
}

.btn-primary,
.cta-button {
  background-color: #F4A261;
  color: #1E3A5F;
}

.btn-primary:hover,
.cta-button:hover {
  background-color: #e8944a;
  color: #1E3A5F;
  box-shadow: 0 4px 12px rgba(244, 162, 97, 0.35);
  transform: translateY(-1px);
}

.btn-secondary,
.cta-button.is-secondary {
  background-color: transparent;
  color: #1E3A5F;
  border: 2px solid #1E3A5F;
}

.btn-secondary:hover,
.cta-button.is-secondary:hover {
  background-color: #1E3A5F;
  color: #ffffff;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding-top: 16px;
  padding-bottom: 8px;
  font-size: 14px;
  color: #777777;
}

.breadcrumb a {
  color: #1E3A5F;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #aaaaaa;
}

.breadcrumb-current {
  color: #777777;
}

/* ---------- 内页页头 ---------- */
.page-header {
  padding-top: 8px;
  padding-bottom: 8px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 0;
}

.page-intro {
  font-size: 16px;
  color: #555555;
  margin-bottom: 0;
}

/* ---------- 区块标题 ---------- */
.section-header,
.section-heading {
  margin-bottom: 32px;
}

.section-title {
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: #777777;
  margin-bottom: 0;
}

/* ---------- 首页 hero ---------- */
.hero {
  background-color: #1E3A5F;
  color: #ffffff;
  padding-top: 56px;
  padding-bottom: 56px;
}

.hero-content,
.hero-figure {
  max-width: 1200px;
}

.hero {
  display: flex;
  align-items: center;
}

.hero-content {
  flex: 1 1 55%;
}

.hero-figure {
  flex: 1 1 45%;
}

.hero-title {
  font-size: 36px;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
  max-width: 540px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.tag-item {
  display: inline-block;
  padding: 4px 14px;
  font-size: 13px;
  border-radius: 20px;
  background-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.hero .btn-primary {
  background-color: #F4A261;
  color: #1E3A5F;
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ---------- 首页服务矩阵概览 ---------- */
.service-matrix-overview {
  padding-top: 56px;
  padding-bottom: 56px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 24px;
  border-top: 4px solid transparent;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.service-card .card-tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 3px;
  margin-bottom: 12px;
  color: #ffffff;
}

.tag-hot {
  background-color: #E76F51;
}

.tag-track {
  background-color: #2A9D8F;
}

.tag-report {
  background-color: #E9C46A;
  color: #333333;
}

.tag-leak {
  background-color: #264653;
}

.tag-warn {
  background-color: #8AB17D;
}

.tag-consult {
  background-color: #A98467;
}

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

.card-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: #1E3A5F;
}

.card-link:hover {
  color: #F4A261;
}

/* ---------- 首页典型场景 ---------- */
.scenarios {
  padding-top: 56px;
  padding-bottom: 56px;
  background-color: #ffffff;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background-color: #F7F5F2;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.scenario-figure {
  width: 100%;
  height: 160px;
  overflow: hidden;
}

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

.scenario-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

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

.scenario-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.scenario-tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 3px;
  background-color: #1E3A5F;
  color: #ffffff;
}

/* ---------- 首页合作流程摘要 ---------- */
.process-summary {
  padding-top: 56px;
  padding-bottom: 56px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.step-item {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #1E3A5F;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.step-desc {
  font-size: 13px;
  color: #777777;
  line-height: 1.5;
  margin-bottom: 0;
}

.process-summary .btn-secondary {
  display: flex;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
}

/* ---------- 首页 FAQ 预览 ---------- */
.faq-preview {
  padding-top: 56px;
  padding-bottom: 56px;
  background-color: #ffffff;
}

.faq-list {
  max-width: 800px;
  margin-bottom: 32px;
}

.faq-item {
  border: 1px solid #e5e2de;
  border-radius: 6px;
  margin-bottom: 12px;
  background-color: #ffffff;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #1E3A5F;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: #F4A261;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #555555;
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer a {
  color: #1E3A5F;
  font-weight: 600;
}

.faq-preview .btn-secondary {
  display: flex;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
}

/* ---------- 首页服务边界 ---------- */
.service-boundary {
  padding-top: 48px;
  padding-bottom: 56px;
}

.boundary-content {
  max-width: 800px;
}

.boundary-content p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
}

/* ---------- 内页通用 ---------- */
.inner-main {
  padding-bottom: 56px;
}

/* ---------- 服务矩阵页 ---------- */
.page-title-inner {
  padding-bottom: 24px;
}

.filter-bar {
  position: sticky;
  top: 64px;
  z-index: 50;
  background-color: #F7F5F2;
  border-bottom: 1px solid #e5e2de;
}

.filter-bar-inner {
  display: flex;
  gap: 4px;
  padding-top: 12px;
  padding-bottom: 12px;
  overflow-x: auto;
}

.filter-item {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: #555555;
  border-radius: 4px 4px 0 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.filter-item:hover {
  color: #1E3A5F;
}

.filter-item.is-active {
  color: #1E3A5F;
  font-weight: 600;
  border-bottom-color: #F4A261;
}

.service-list {
  padding-top: 40px;
}

.service-category {
  margin-bottom: 48px;
  scroll-margin-top: 120px;
}

.category-title {
  font-size: 22px;
  margin-bottom: 6px;
}

.category-desc {
  font-size: 14px;
  color: #777777;
  margin-bottom: 24px;
}

.service-item {
  display: flex;
  gap: 24px;
  background-color: #ffffff;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.service-media {
  flex: 0 0 200px;
  height: 150px;
  border-radius: 6px;
  overflow: hidden;
}

.service-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-content {
  flex: 1;
}

.service-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.service-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 12px;
}

.service-meta {
  margin-bottom: 8px;
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.meta-title {
  font-size: 13px;
  color: #777777;
}

.service-link {
  font-size: 14px;
  font-weight: 600;
  color: #1E3A5F;
}

.service-link:hover {
  color: #F4A261;
}

/* ---------- 服务矩阵 CTA ---------- */
.support-cta {
  background-color: #1E3A5F;
  padding-top: 48px;
  padding-bottom: 48px;
}

.support-cta-inner {
  text-align: center;
}

.support-cta-title {
  font-size: 24px;
  color: #ffffff;
  margin-bottom: 12px;
}

.support-cta-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
}

.support-cta-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-button.is-secondary {
  border-color: #ffffff;
  color: #ffffff;
}

.cta-button.is-secondary:hover {
  background-color: #ffffff;
  color: #1E3A5F;
}

/* ---------- 相关链接 ---------- */
.related-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 24px;
  padding-bottom: 8px;
  font-size: 14px;
}

.related-links-label {
  color: #777777;
}

.related-links-item {
  color: #1E3A5F;
  font-weight: 500;
}

.related-links-item:hover {
  color: #F4A261;
}

/* ---------- 合作流程页 ---------- */
.page-title-area {
  padding-bottom: 24px;
}

.process-overview {
  padding-top: 32px;
  padding-bottom: 32px;
}

.process-overview .process-steps {
  margin-bottom: 0;
}

.process-overview .step-item {
  text-align: left;
}

.process-overview .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #1E3A5F;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.process-detail {
  padding-top: 32px;
  padding-bottom: 32px;
}

.phase-block {
  display: flex;
  gap: 40px;
  background-color: #ffffff;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.phase-reverse {
  flex-direction: row-reverse;
}

.phase-content {
  flex: 1 1 60%;
}

.phase-content h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.phase-content p {
  font-size: 14px;
  color: #555555;
  line-height: 1.7;
  margin-bottom: 12px;
}

.phase-content h4 {
  font-size: 15px;
  margin-top: 12px;
  margin-bottom: 6px;
}

.phase-media {
  flex: 1 1 40%;
  border-radius: 6px;
  overflow: hidden;
  align-self: flex-start;
}

.phase-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 6px;
}

.cooperation-notes {
  padding-top: 24px;
}

.notes-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

/* ---------- FAQ 页 ---------- */
.page-title-section {
  padding-bottom: 24px;
}

.faq-categories {
  padding-top: 24px;
  padding-bottom: 24px;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.category-tab {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  color: #555555;
  background-color: #ffffff;
  border: 1px solid #e5e2de;
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease,
    border-color 0.2s ease;
}

.category-tab:hover {
  color: #1E3A5F;
  border-color: #1E3A5F;
}

.faq-list {
  padding-top: 8px;
  padding-bottom: 24px;
}

.faq-category-block {
  margin-bottom: 40px;
  scroll-margin-top: 120px;
}

.faq-category-title {
  font-size: 20px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #F4A261;
}

.faq-image-section {
  padding-top: 24px;
  padding-bottom: 24px;
}

.faq-figure {
  border-radius: 8px;
  overflow: hidden;
}

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

.faq-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: #777777;
  background-color: #ffffff;
}

/* ---------- FAQ 支持引导 ---------- */
.support-link {
  padding-top: 24px;
  padding-bottom: 24px;
}

.support-link-card {
  background-color: #1E3A5F;
  border-radius: 8px;
  padding: 40px;
  text-align: center;
}

.support-link-title {
  font-size: 22px;
  color: #ffffff;
  margin-bottom: 12px;
}

.support-link-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
}

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

.support-link-actions .btn-secondary {
  border-color: #ffffff;
  color: #ffffff;
}

.support-link-actions .btn-secondary:hover {
  background-color: #ffffff;
  color: #1E3A5F;
}

/* ---------- 支持页 ---------- */
.page-title-block {
  padding-bottom: 24px;
}

.support-scope,
.help-docs,
.status-section,
.feedback-section {
  padding-top: 32px;
  padding-bottom: 32px;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scope-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.scope-card-icon {
  margin-bottom: 16px;
}

.icon-dot {
  display: inline-block;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #1E3A5F;
}

.scope-card:nth-child(2) .icon-dot {
  background-color: #F4A261;
}

.scope-card:nth-child(3) .icon-dot {
  background-color: #2A9D8F;
}

.scope-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.scope-card p {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.scope-card a {
  font-size: 14px;
  font-weight: 600;
  color: #1E3A5F;
}

.scope-card a:hover {
  color: #F4A261;
}

/* ---------- 帮助文档导航 ---------- */
.help-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.help-item {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s ease;
}

.help-item:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.help-item-text h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.help-item-text p {
  font-size: 13px;
  color: #777777;
  margin-bottom: 0;
}

.help-item a {
  font-size: 14px;
  font-weight: 600;
  color: #1E3A5F;
  white-space: nowrap;
}

.help-item a:hover {
  color: #F4A261;
}

/* ---------- 服务状态 ---------- */
.status-content {
  display: flex;
  gap: 32px;
  align-items: center;
}

.status-figure {
  flex: 1 1 40%;
  border-radius: 6px;
  overflow: hidden;
}

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

.status-figure figcaption {
  padding: 10px 12px;
  font-size: 13px;
  color: #777777;
  background-color: #ffffff;
}

.status-text {
  flex: 1 1 60%;
}

.status-text p {
  font-size: 14px;
  color: #555555;
  line-height: 1.7;
}

/* ---------- 反馈方式 ---------- */
.feedback-content {
  max-width: 800px;
}

.feedback-content p {
  font-size: 14px;
  color: #555555;
  line-height: 1.7;
}

.feedback-list {
  margin: 16px 0;
  padding-left: 0;
}

.feedback-list li {
  margin-bottom: 10px;
  font-size: 14px;
}

.feedback-list a {
  color: #1E3A5F;
  font-weight: 500;
}

.feedback-list a:hover {
  color: #F4A261;
}

.feedback-note {
  font-size: 13px;
  color: #777777;
}

/* ---------- 404 页 ---------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
  padding-bottom: 80px;
}

.error-section {
  text-align: center;
  max-width: 560px;
  padding: 0 24px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #1E3A5F;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #666666;
  margin-bottom: 28px;
}

.error-btn {
  background-color: #F4A261;
  color: #1E3A5F;
  margin-bottom: 24px;
}

.error-btn:hover {
  background-color: #e8944a;
  color: #1E3A5F;
  box-shadow: 0 4px 12px rgba(244, 162, 97, 0.35);
}

.error-help {
  font-size: 14px;
  color: #777777;
}

.error-help a {
  color: #1E3A5F;
  font-weight: 500;
  margin: 0 6px;
}

.error-help a:hover {
  color: #F4A261;
}

/* ==========================================================================
   pages 页面层
   ========================================================================== */

/* 首页 body */
.site-home {
  background-color: #F7F5F2;
}

/* 内页 body */
.site-inner {
  background-color: #F7F5F2;
}

/* 404 body */
.site-error {
  background-color: #F7F5F2;
}

/* ==========================================================================
   responsive 响应式
   ========================================================================== */

@media (max-width: 992px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
  }

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

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

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

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

  .service-item {
    flex-direction: column;
  }

  .service-media {
    flex: 0 0 auto;
    width: 100%;
    height: 180px;
  }

  .phase-block,
  .phase-reverse {
    flex-direction: column;
    gap: 20px;
  }

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

  .status-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-figure {
    width: 100%;
  }

  .hero {
    flex-direction: column;
    gap: 32px;
  }

  .hero-content,
  .hero-figure {
    width: 100%;
  }

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 8px;
  }

  .nav-list .nav-link {
    padding: 12px 16px;
    border-radius: 4px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

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

  .page-title {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    display: block;
    order: 3;
    width: 100%;
  }

  .main-nav .nav-list {
    display: none;
    flex-direction: column;
    padding-top: 4px;
    padding-bottom: 8px;
  }

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

  .brand-name {
    font-size: 19px;
  }

  .brand-tagline {
    font-size: 11px;
  }

  .hero {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .hero-title {
    font-size: 28px;
  }

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

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

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

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

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 36px;
  }

  .section-header,
  .section-heading {
    margin-bottom: 24px;
  }

  .service-matrix-overview,
  .scenarios,
  .process-summary,
  .faq-preview,
  .service-boundary {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .service-item {
    padding: 20px;
  }

  .service-media {
    height: 160px;
  }

  .support-link-card {
    padding: 28px 20px;
  }

  .support-cta-links {
    flex-direction: column;
    align-items: center;
  }

  .support-cta-links .cta-button {
    width: 100%;
    max-width: 280px;
  }

  .support-link-actions {
    flex-direction: column;
    align-items: center;
  }

  .support-link-actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .error-code {
    font-size: 56px;
  }

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

  .phase-block {
    padding: 20px;
  }

  .phase-media img {
    height: 160px;
  }

  .status-figure img {
    height: 180px;
  }

  .faq-figure img {
    height: 200px;
  }

  .filter-item {
    font-size: 13px;
    padding: 6px 14px;
  }

  .related-links {
    gap: 8px;
  }

  .related-links-label {
    width: 100%;
  }
}