/* ============================================================
   zsdrjq168.com 全站样式
   极简品牌风 · 深墨蓝 + 琥珀橙 · 系统字体栈
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ============================================================
   base —— 全局基础
   ============================================================ */
:root {
  --color-primary: #1B2A41;
  --color-accent: #E8890C;
  --color-bg: #FBFBFA;
  --color-gray-light: #F0F2F4;
  --color-text: #3C444C;
  --color-text-muted: #7A828A;
  --color-white: #FFFFFF;
  --color-border: #E3E6E9;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --container-width: 1200px;
  --content-width: 720px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-base: 0.2s ease;
  --header-height: 68px;
}

*,
*::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: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-stack);
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 600;
}

p {
  margin-bottom: 1em;
}

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

button {
  font-family: var(--font-stack);
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea {
  font-family: var(--font-stack);
  font-size: 16px;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

/* 辅助可访问性 */
.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 —— 全站布局骨架
   ============================================================ */

/* 站点主体：默认单栏，内页带侧栏的由 .page-layout 处理 */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 头部 */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.4;
  white-space: nowrap;
}

/* 主导航 */
.primary-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  line-height: 1.4;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.nav-link:hover {
  background-color: var(--color-gray-light);
  color: var(--color-primary);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-accent);
}

/* 汉堡按钮：桌面隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: transparent;
}

.nav-toggle:hover {
  background-color: var(--color-gray-light);
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 主内容区 */
.site-main {
  flex: 1;
  width: 100%;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand {
  margin-bottom: 24px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
}

.footer-nav {
  margin-bottom: 24px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 0;
}

.footer-nav-list li {
  list-style: none;
}

.footer-nav-list a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  padding: 4px 0;
  display: inline-block;
}

.footer-nav-list a:hover {
  color: var(--color-white);
}

.footer-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 8px;
  line-height: 1.5;
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.5;
}

/* ============================================================
   components —— 通用组件
   ============================================================ */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  min-height: 44px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #d17a08;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 137, 12, 0.25);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 500;
}

.text-link::after {
  content: "→";
  transition: transform var(--transition-base);
}

.text-link:hover {
  color: #d17a08;
}

.text-link:hover::after {
  transform: translateX(3px);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.breadcrumb-sep {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页标题区 */
.page-header {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 40px 24px 0;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.page-title-area {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 12px 24px 32px;
}

.page-intro {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
}

.page-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
}

/* 内页主内容 */
.inner-main {
  width: 100%;
}

/* 相关内容导航（内页底部） */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background-color: var(--color-gray-light);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.related-links-item:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* 内容区块通用 */
.content-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.content-section h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 16px;
}

.content-section h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-lead {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* 图片容器 */
.content-figure,
.method-figure,
.boundary-figure,
.timeline-figure,
.contact-figure,
.article-figure,
.content-media {
  margin-bottom: 24px;
}

.content-figure img,
.method-figure img,
.boundary-figure img,
.timeline-figure img,
.contact-figure img,
.article-figure img,
.content-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* ============================================================
   pages —— 首页
   ============================================================ */

/* 全宽首屏焦点区 */
.hero-section {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  background-color: var(--color-primary);
}

.hero-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.65;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px 24px;
  color: var(--color-white);
}

.hero-content h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
  line-height: 1.3;
}

.hero-lead {
  font-size: 18px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-bottom: 28px;
  line-height: 1.7;
}

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

.hero-actions .btn {
  min-width: 160px;
}

.hero-actions .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.hero-actions .btn-secondary {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--color-white);
}

.hero-actions .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--color-white);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* 公告状态条 */
.notice-bar {
  background-color: var(--color-gray-light);
  padding: 10px 24px;
  text-align: center;
}

.notice-bar p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* 通用 section 容器 */
.section-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.section-inner h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* 服务范围总览 */
.services-overview {
  background-color: var(--color-white);
}

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

.service-item {
  padding: 0;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  font-size: 22px;
  color: var(--color-accent);
  background-color: rgba(232, 137, 12, 0.1);
  border-radius: var(--radius-md);
}

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

.service-item p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* 自检工具 */
.risk-tool-section {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.tool-form-wrap h2 {
  margin-bottom: 8px;
}

.tool-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.tool-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
  min-height: 44px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232, 137, 12, 0.15);
}

.tool-form .btn {
  align-self: flex-start;
  margin-top: 8px;
}

.tool-result-wrap {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.tool-result-placeholder h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tool-result-placeholder p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

.tool-result-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.tool-result-content p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 12px;
}

.tool-result-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: 16px;
}

.tool-result-content li {
  font-size: 14px;
  color: var(--color-text);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.6;
  display: flex;
  gap: 8px;
}

.tool-result-content li::before {
  content: "·";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.tool-limit-note {
  font-size: 13px;
  color: var(--color-text-muted);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.6;
  margin-bottom: 0;
}

.tool-limit-note strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* 工作方式说明 */
.work-method-section {
  background-color: var(--color-white);
}

.method-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

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

.method-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

.method-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* 合作流程 */
.cooperation-process {
  background-color: var(--color-bg);
}

.process-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 0;
}

.process-step {
  list-style: none;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 相关任务带（首页） */
.task-band {
  background-color: var(--color-gray-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.task-band-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  align-items: center;
}

.task-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 8px 0;
}

.task-link::after {
  content: "→";
  color: var(--color-accent);
  transition: transform var(--transition-base);
}

.task-link:hover::after {
  transform: translateX(3px);
}

/* FAQ 预览 */
.faq-preview {
  background-color: var(--color-white);
}

.faq-preview-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 32px;
}

.faq-preview-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-preview-item:first-child {
  border-top: 1px solid var(--color-border);
}

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

.faq-preview-item p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   pages —— 服务能力页
   ============================================================ */

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

.page-layout .inner-main {
  min-width: 0;
}

/* 服务能力目录 */
.capability-directory {
  padding-bottom: 48px;
}

.capability-directory h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.capability-directory .section-lead {
  margin-bottom: 32px;
}

.capability-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.capability-item:first-of-type {
  border-top: 1px solid var(--color-border);
}

.capability-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.capability-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.capability-item > p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 16px;
}

.deliverable-block {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.deliverable-block h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.deliverable-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 16px;
}

.deliverable-list li {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.5;
  padding-left: 16px;
  position: relative;
}

.deliverable-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* 应用场景 */
.scenario-section {
  padding-bottom: 48px;
}

.scenario-section h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.scenario-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.scenario-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.scenario-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 12px;
}

.scenario-item .scenario-audience {
  font-size: 13px;
  color: var(--color-text-muted);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin: 0;
}

/* 服务边界 */
.boundary-section {
  padding-bottom: 48px;
}

.boundary-text h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
}

.boundary-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 16px;
}

.boundary-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* 侧栏（服务能力页） */
.related-tasks {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.related-tasks-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.task-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-links .task-link {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-accent);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.task-links .task-link:last-child {
  border-bottom: none;
}

.task-links .task-link:hover {
  color: #d17a08;
}

/* ============================================================
   pages —— 方法与流程页
   ============================================================ */

.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.layout-shell .inner-main {
  min-width: 0;
}

.page-content {
  width: 100%;
}

/* 方法列表 */
.method-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.method-list li {
  list-style: none;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

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

.method-list p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 步骤列表 */
.step-list {
  list-style: none;
  counter-reset: step-counter;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-list li {
  list-style: none;
  counter-increment: step-counter;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px 20px 64px;
  position: relative;
}

.step-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.step-list p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 风险分级 */
.risk-level-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.risk-level-list li {
  list-style: none;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border-left: 4px solid var(--color-accent);
}

.risk-level-list h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.risk-level-list p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 流程步骤（方法页） */
.flow-steps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.flow-steps .process-step {
  padding: 20px;
}

.flow-note {
  font-size: 14px;
  color: var(--color-text-muted);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.6;
  margin-top: 16px;
}

.flow-note a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* 侧栏（方法页） */
.task-strip {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.task-strip-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.task-strip .task-link {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-accent);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.task-strip .task-link:last-child {
  border-bottom: none;
}

/* ============================================================
   pages —— 发展记录页
   ============================================================ */

.content-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.timeline-wrap {
  min-width: 0;
}

/* 时间线 */
.development-timeline {
  position: relative;
  padding-left: 32px;
}

.development-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-stage {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(232, 137, 12, 0.1);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  margin-bottom: 8px;
}

.timeline-content h2 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

/* 能力建设总结 */
.capability-summary {
  margin-top: 48px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.capability-summary h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

/* 侧栏（发展记录页） */
.related-tasks .task-link {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-accent);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.related-tasks .task-link:last-child {
  border-bottom: none;
}

/* ============================================================
   pages —— 行业观察页
   ============================================================ */

.page-title-block {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 12px 24px 32px;
}

.article-list-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
}

.insight-article-list {
  padding-bottom: 48px;
}

.insight-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.insight-card-featured {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: center;
}

.insight-media {
  min-width: 0;
}

.article-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

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

.article-title {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 12px;
}

.article-audience {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.article-audience strong {
  color: var(--color-primary);
  font-weight: 600;
}

.read-more-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.read-more-link::after {
  content: "→";
  transition: transform var(--transition-base);
}

.read-more-link:hover::after {
  transform: translateX(3px);
}

/* 阅读说明 */
.reading-note {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-bottom: 48px;
}

.reading-note h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.reading-note p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

/* 相关任务导航（行业观察页） */
.related-task-bar {
  border-top: 1px solid var(--color-border);
  padding: 24px 0 48px;
}

.related-task-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

.related-task-bar .task-links {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 12px;
}

.related-task-bar .task-link {
  display: inline-flex;
  padding: 8px 16px;
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-accent);
}

.related-task-bar .task-link:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* ============================================================
   pages —— 常见问题页
   ============================================================ */

.content-shell {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.faq-category-section {
  padding-bottom: 40px;
}

.content-media-inline {
  margin-bottom: 24px;
}

.content-media-inline img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.category-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.category-tag:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* FAQ 列表 */
.faq-list-section {
  padding-bottom: 48px;
}

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

.faq-group-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 16px;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color var(--transition-base);
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-question {
  color: var(--color-accent);
}

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

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

.faq-answer p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
}

/* 更多帮助 */
.more-help-section {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-bottom: 48px;
}

.more-help-section h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.more-help-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* 侧栏（FAQ页） */
.related-task-bar {
  background-color: var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 48px;
}

.related-task-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.related-task-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-accent);
  padding: 8px 0;
  margin-right: 16px;
}

.related-task-link::after {
  content: "→";
}

/* ============================================================
   pages —— 合作联系页
   ============================================================ */

.page-article {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-description {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-top: 12px;
  line-height: 1.7;
}

/* 沟通方式 */
.contact-intro-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.contact-intro-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 12px;
}

.contact-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* 准备清单 */
.checklist {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.checklist-item {
  list-style: none;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.checklist-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.checklist-item h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.checklist-item p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 8px;
}

.checklist-item .item-example {
  font-size: 13px;
  color: var(--color-text-muted);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin: 0;
  line-height: 1.5;
}

/* 合作流程（联系页） */
.cooperation-process .process-steps {
  grid-template-columns: repeat(3, 1fr);
}

.cooperation-process .process-step {
  padding: 24px;
}

.step-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-body p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 相关任务（联系页） */
.contact-page .related-tasks {
  background-color: transparent;
  padding: 0;
  position: static;
  border-top: 1px solid var(--color-border);
  border-radius: 0;
  margin-top: 48px;
}

.contact-page .related-tasks .task-links {
  flex-direction: row;
  gap: 24px;
}

/* ============================================================
   pages —— 404
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

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

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  min-height: 44px;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.error-home-link:hover {
  background-color: #d17a08;
  color: var(--color-white);
  transform: translateY(-2px);
}

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

/* 平板 1024px */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .nav-link {
    padding: 10px 12px;
    font-size: 14px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }

  .page-layout,
  .layout-shell,
  .content-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 32px;
  }

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

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

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

  .insight-card-featured {
    grid-template-columns: 1fr;
  }

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

/* 手机 768px */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    height: var(--header-height);
    padding: 0 16px;
    gap: 12px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    margin-left: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .primary-nav.is-open {
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    padding: 8px 16px 16px;
    gap: 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 14px 12px;
    font-size: 16px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-accent);
    background-color: rgba(232, 137, 12, 0.06);
  }

  /* 首页 */
  .hero-section {
    min-height: 400px;
  }

  .hero-content {
    padding: 60px 20px;
  }

  .hero-content h1 {
    font-size: 26px;
  }

  .hero-lead {
    font-size: 16px;
  }

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

  .hero-actions .btn {
    min-width: 0;
    width: 100%;
  }

  .section-inner {
    padding: 48px 20px;
  }

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

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

  .tool-layout,
  .method-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .tool-result-wrap {
    padding: 24px;
  }

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

  .task-band-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .faq-preview-list {
    margin-bottom: 24px;
  }

  /* 内页 */
  .breadcrumb {
    padding: 12px 16px 0;
  }

  .page-header {
    padding: 32px 16px 0;
  }

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

  .page-title-area,
  .page-title-block {
    padding: 12px 16px 28px;
  }

  .content-section {
    padding: 0 16px 40px;
  }

  .content-shell {
    padding: 0 16px;
  }

  .page-article {
    padding: 0 16px;
  }

  /* 侧栏布局改为单栏 */
  .page-layout,
  .layout-shell,
  .content-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 16px;
  }

  .related-tasks,
  .task-strip {
    position: static;
    order: 2;
  }

  .related-links {
    padding: 16px;
  }

  /* 服务能力 */
  .deliverable-list {
    grid-template-columns: 1fr;
  }

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

  .capability-item {
    padding: 20px 0;
  }

  /* 方法页 */
  .step-list li {
    padding: 16px 16px 16px 56px;
  }

  .step-list li::before {
    left: 16px;
    top: 16px;
  }

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

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

  /* 发展记录 */
  .development-timeline {
    padding-left: 28px;
  }

  .timeline-marker {
    left: -28px;
  }

  .capability-summary {
    padding: 24px;
  }

  /* 行业观察 */
  .article-list-layout {
    padding: 0 16px;
  }

  .insight-card {
    padding: 20px;
  }

  .insight-card-featured {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .reading-note {
    padding: 20px;
  }

  /* FAQ */
  .category-index {
    gap: 6px;
  }

  .category-tag {
    padding: 8px 12px;
    font-size: 13px;
  }

  .faq-group-title {
    font-size: 16px;
  }

  .faq-question {
    font-size: 14px;
  }

  .more-help-section {
    padding: 20px;
  }

  /* 联系页 */
  .contact-intro-wrap {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

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

  /* 页脚 */
  .footer-inner {
    padding: 40px 16px 28px;
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 4px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }
}

/* 小手机 480px */
@media (max-width: 480px) {
  .hero-content {
    padding: 48px 16px;
  }

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

  .hero-desc {
    font-size: 14px;
  }

  .notice-bar {
    padding: 8px 16px;
  }

  .notice-bar p {
    font-size: 13px;
  }

  .section-inner {
    padding: 40px 16px;
  }

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

  .service-item p {
    font-size: 14px;
  }

  .tool-result-wrap {
    padding: 20px;
  }

  .tool-form .btn {
    width: 100%;
  }

  .process-step {
    padding: 20px;
  }

  .task-band-inner {
    padding: 16px;
  }

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

  .content-section h2,
  .section-title {
    font-size: 20px;
  }

  .capability-item h3,
  .scenario-item h3,
  .article-title {
    font-size: 17px;
  }

  .insight-card {
    padding: 16px;
  }

  .related-task-bar .task-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .related-task-link {
    margin-right: 0;
  }

  .checklist-item {
    padding: 16px;
  }

  .step-list li {
    padding: 16px 16px 16px 52px;
  }

  .step-list li::before {
    left: 14px;
    width: 26px;
    height: 26px;
    font-size: 13px;
  }
}

/* ============================================================
   无障碍 —— 减少动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}