/* ============================================================
   fsjdqe.cn — 黑料24小时不打烊 全站样式
   视觉方向：复古计算机终端风
   配色：终端底色 #10131a / 面板 #f5f1e8 / 信号红 #df4c32
         核查绿 #2e6f66 / 警示黄 #e1b12c / 正文深色 #1c1e24
   ============================================================ */

/* ============================================================
   1. Base — 变量、重置、全局基础
   ============================================================ */
:root {
  --bg-terminal: #10131a;
  --bg-panel: #f5f1e8;
  --bg-panel-deep: #e8e1d3;
  --bg-dark: #1c1e24;
  --bg-dark-light: #262a33;
  --text-light: #f5f1e8;
  --text-dark: #1c1e24;
  --text-muted: #8a8f9a;
  --signal-red: #df4c32;
  --verify-green: #2e6f66;
  --warn-yellow: #e1b12c;
  --border-pixel: #3a3f4a;
  --border-pixel-light: #5a5f6a;
  --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --container-w: 1100px;
  --radius: 6px;
  --radius-sm: 4px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-terminal);
  color: var(--text-light);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

/* 等宽字体辅助 */
.mono,
code,
.mono-tag,
.eyebrow-label,
.page-tag,
.section-tag,
.hero-tag,
.step-num,
.step-number,
.step-label,
.rep-tag,
.not-service-tag,
.brief-tag,
.tag,
.error-code {
  font-family: var(--font-mono);
}

/* 隐藏但可读（用于屏幕阅读器 / SEO 标题） */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   2. Layout — 全站骨架、容器、页头页脚
   ============================================================ */

/* 站点主容器宽度统一 */
.header-inner,
.footer-inner,
.page-layout,
.layout-shell,
.page-container,
.page-heading,
.page-title-area,
.page-title-block,
.related-links {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

/* ---------- 页头 ---------- */
.site-header {
  background-color: var(--bg-dark);
  border-bottom: 2px solid var(--border-pixel);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 12px;
  color: var(--warn-yellow);
  font-family: var(--font-mono);
}

/* ---------- 主导航 ---------- */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-item {
  position: relative;
}

.nav-link,
.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-muted);
  transition: color 0.2s;
  min-height: 44px;
}

.nav-link:hover,
.nav-dropdown-toggle:hover,
.nav-link.is-current {
  color: var(--text-light);
}

.nav-link.is-current {
  box-shadow: inset 0 -2px 0 var(--warn-yellow);
}

.nav-dropdown-toggle {
  gap: 6px;
}

.nav-dropdown-toggle::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s;
  margin-top: -3px;
}

.nav-dropdown-toggle[aria-expanded="true"]::after {
  transform: rotate(225deg);
  margin-top: 3px;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  min-width: 180px;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 6px;
  display: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.dropdown-menu li a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.dropdown-menu li a:hover {
  color: var(--text-light);
  background-color: var(--bg-terminal);
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu,
.has-dropdown .dropdown-menu.is-open {
  display: block;
}

/* 移动端汉堡按钮 */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
}

.toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-light);
  transition: transform 0.2s, opacity 0.2s;
}

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

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

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

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--bg-dark);
  border-top: 2px solid var(--border-pixel);
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 48px 0 32px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-light);
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-slogan {
  font-size: 13px;
  color: var(--warn-yellow);
  font-family: var(--font-mono);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 14px;
  font-family: var(--font-mono);
}

.footer-col ul li a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--text-light);
}

.footer-bottom {
  border-top: 1px solid var(--border-pixel);
  padding: 16px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

/* ---------- 主区域 ---------- */
.site-main {
  flex: 1;
}

.inner-main {
  padding: 32px 0 64px;
}

/* 面包屑 */
.breadcrumb,
.breadcrumb-nav {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a,
.breadcrumb-list a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.breadcrumb a:hover,
.breadcrumb-list a:hover {
  color: var(--warn-yellow);
}

.breadcrumb-sep {
  color: var(--border-pixel-light);
}

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  color: var(--text-light);
  font-weight: 700;
}

.page-title-area {
  margin-bottom: 28px;
}

.page-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 8px;
}

.page-summary {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
}

/* 页面标题块（faq / cooperation 变体） */
.page-heading {
  margin-bottom: 28px;
}

.page-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 8px;
}

.page-title-block {
  margin-bottom: 28px;
}

.eyebrow-label {
  display: inline-block;
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 8px;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
}

/* 通用 section 标题 */
.section-title {
  font-size: 22px;
  line-height: 1.4;
  color: var(--text-light);
  margin-bottom: 16px;
}

.section-intro {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
  max-width: 760px;
}

/* 区块标题（首页） */
.section-heading {
  margin-bottom: 32px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: 22px;
  line-height: 1.4;
  color: var(--text-light);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 680px;
}

/* ============================================================
   3. Components — 按钮、标签、卡片、折叠、表格等通用组件
   ============================================================ */

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--signal-red);
  color: var(--text-light);
  border-color: var(--signal-red);
}

.btn-primary:hover {
  background-color: #c43d26;
  border-color: #c43d26;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-light);
  border-color: var(--border-pixel-light);
}

.btn-secondary:hover {
  border-color: var(--text-light);
  background-color: rgba(245, 241, 232, 0.05);
}

.btn-outline {
  background-color: transparent;
  color: var(--warn-yellow);
  border-color: var(--warn-yellow);
  min-height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

.btn-outline:hover {
  background-color: var(--warn-yellow);
  color: var(--bg-dark);
}

.btn-pixel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 500;
  background-color: var(--verify-green);
  color: var(--text-light);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s;
}

.btn-pixel:hover {
  background-color: #23564f;
}

/* ---------- 等宽标签 chip ---------- */
.tag,
.brief-tag,
.rep-tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 2px;
  border: 1px solid var(--border-pixel-light);
  color: var(--text-muted);
  line-height: 1.6;
}

/* 警示黄标签 */
.tag--warn,
.brief-tag--warn {
  color: var(--warn-yellow);
  border-color: var(--warn-yellow);
}

/* 核查绿标签 */
.tag--ok,
.brief-tag--ok {
  color: var(--verify-green);
  border-color: var(--verify-green);
}

/* 信号红标签 */
.tag--red,
.brief-tag--red {
  color: var(--signal-red);
  border-color: var(--signal-red);
}

/* 首页简报标签 */
.tag {
  color: var(--warn-yellow);
  border-color: var(--warn-yellow);
}

/* ---------- 折叠面板 ---------- */
.faq-item {
  border-bottom: 1px solid var(--border-pixel);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  min-height: 44px;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--warn-yellow);
  flex-shrink: 0;
  transition: transform 0.2s;
}

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

.faq-item summary:hover {
  color: var(--warn-yellow);
}

.faq-answer,
.faq-item > p {
  padding: 0 0 16px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
}

.delivery-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.delivery-table th,
.delivery-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-pixel);
  vertical-align: top;
}

.delivery-table thead th {
  background-color: var(--bg-dark-light);
  color: var(--text-light);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
}

.delivery-table tbody tr:last-child td {
  border-bottom: none;
}

.delivery-table tbody tr:hover td {
  background-color: rgba(255, 255, 255, 0.03);
}

/* ---------- 图片容器 ---------- */
figure {
  margin: 0;
}

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

figcaption {
  font-size: 13px;
  color: var(--text-muted);
  padding-top: 8px;
  font-family: var(--font-mono);
}

/* ---------- 侧栏组件 ---------- */
.sidebar-block,
.sidebar-card {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar-block h2,
.sidebar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 14px;
  font-family: var(--font-mono);
}

.sidebar-links li a,
.sidebar-link-list li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color 0.2s, padding-left 0.2s;
}

.sidebar-links li a:hover,
.sidebar-link-list li a:hover {
  color: var(--warn-yellow);
  padding-left: 6px;
}

.sidebar-links li:last-child a,
.sidebar-link-list li:last-child a {
  border-bottom: none;
}

.sidebar-figure {
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: 20px;
}

.sidebar-figure img {
  aspect-ratio: 4 / 3;
}

.sidebar-figure figcaption {
  padding: 10px 12px;
  background-color: var(--bg-dark-light);
}

/* ---------- 相关内容导航 ---------- */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-pixel);
}

.related-links-label {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 14px;
  font-size: 14px;
  color: var(--warn-yellow);
  border: 1px solid var(--border-pixel-light);
  border-radius: 999px;
  transition: border-color 0.2s, background-color 0.2s;
}

.related-links-item:hover {
  border-color: var(--warn-yellow);
  background-color: rgba(225, 177, 44, 0.08);
}

/* ---------- 文本链接 ---------- */
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--warn-yellow);
  font-size: 14px;
  border-bottom: 1px solid var(--warn-yellow);
  transition: color 0.2s;
}

.text-link:hover {
  color: var(--text-light);
  border-color: var(--text-light);
}

/* ============================================================
   4. Pages — 首页
   ============================================================ */

/* ---------- Hero ---------- */
.hero-section {
  background-color: var(--bg-terminal);
  border-bottom: 2px solid var(--border-pixel);
  padding: 56px 0;
}

.hero-content {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 16px;
  padding: 4px 12px;
  border: 1px solid var(--warn-yellow);
  border-radius: 2px;
}

.hero-text h1 {
  font-size: 36px;
  line-height: 1.3;
  color: var(--text-light);
  margin-bottom: 16px;
  font-weight: 700;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 520px;
  line-height: 1.8;
}

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

.hero-figure {
  border: 2px solid var(--border-pixel);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--bg-dark-light);
}

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

/* ---------- 近期简报 ---------- */
.recent-briefs-section {
  padding: 56px 0;
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.brief-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.brief-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-pixel);
  align-items: start;
}

.brief-item:first-child {
  border-top: 1px solid var(--border-pixel);
}

.brief-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.brief-meta time {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.brief-item h3 {
  font-size: 17px;
  color: var(--text-light);
  margin-bottom: 6px;
  font-weight: 600;
}

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

.brief-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--warn-yellow);
  transition: color 0.2s;
}

.brief-link:hover {
  color: var(--text-light);
}

.brief-link::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-mono);
}

/* ---------- 研究方向 ---------- */
.research-directions {
  padding: 56px 0;
  background-color: var(--bg-dark);
  border-top: 2px solid var(--border-pixel);
  border-bottom: 2px solid var(--border-pixel);
}

.research-directions .section-heading,
.direction-grid {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

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

.direction-card {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s;
}

.direction-card:hover {
  border-color: var(--border-pixel-light);
}

.direction-card h3 {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 12px;
  font-weight: 600;
}

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

.direction-method {
  font-size: 13px;
  color: var(--verify-green);
  font-family: var(--font-mono);
  padding-top: 12px;
  border-top: 1px solid var(--border-pixel);
  margin-bottom: 12px;
}

.direction-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--warn-yellow);
}

.direction-link:hover {
  color: var(--text-light);
}

.direction-link::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-mono);
}

/* ---------- 服务边界摘要 ---------- */
.service-boundary-summary {
  padding: 56px 0;
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.boundary-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.boundary-col {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 24px;
}

.boundary-col h3 {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

.boundary-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  line-height: 1.6;
}

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

.boundary-list li::before {
  content: "▸";
  color: var(--verify-green);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.boundary-col:last-child .boundary-list li::before {
  content: "▸";
  color: var(--signal-red);
}

/* ---------- 工作方法路径（首页四步） ---------- */
.method-path {
  padding: 56px 0;
  background-color: var(--bg-dark);
  border-top: 2px solid var(--border-pixel);
  border-bottom: 2px solid var(--border-pixel);
}

.method-path .section-heading,
.method-steps,
.method-link {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

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

.method-step {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
}

.step-num {
  display: inline-block;
  font-size: 13px;
  color: var(--warn-yellow);
  margin-bottom: 10px;
}

.method-step h3 {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 8px;
  font-weight: 600;
}

.method-step p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.method-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 14px;
  color: var(--warn-yellow);
}

.method-link:hover {
  color: var(--text-light);
}

.method-link::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-mono);
}

/* ---------- FAQ 摘选 ---------- */
.faq-preview {
  padding: 56px 0;
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.faq-list {
  max-width: 760px;
}

.faq-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-top: 20px;
  font-size: 14px;
  color: var(--warn-yellow);
}

.faq-link:hover {
  color: var(--text-light);
}

.faq-link::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-mono);
}

/* ---------- 合作入口 CTA ---------- */
.cooperation-cta {
  padding: 56px 0;
  background-color: var(--bg-dark);
  border-top: 2px solid var(--border-pixel);
}

.cta-content {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.cta-content h2 {
  font-size: 22px;
  color: var(--text-light);
  margin-bottom: 12px;
  line-height: 1.4;
}

.cta-content p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 480px;
  line-height: 1.8;
}

.cta-visual figure {
  border: 2px solid var(--border-pixel);
  border-radius: var(--radius);
  overflow: hidden;
}

.cta-visual img {
  aspect-ratio: 4 / 3;
}

/* ============================================================
   5. Pages — 内页通用 + 各内页
   ============================================================ */

/* ---------- 内页通用布局 ---------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.layout-shell {
  display: block;
}

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

/* services / responsible / cooperation 页面布局 */
.content-main {
  min-width: 0;
}

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

/* sidebar-area（responsible 页） */
.sidebar-area {
  min-width: 0;
}

/* ---------- 服务边界页 services ---------- */
.page-services .page-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.service-scope-section {
  margin-bottom: 40px;
}

.scope-group {
  margin-bottom: 24px;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 20px;
}

.scope-group h3 {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-pixel);
}

.scope-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

.scope-item {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  line-height: 1.6;
  align-items: flex-start;
}

.scope-item::before {
  content: "▸";
  color: var(--verify-green);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.not-service-section {
  margin-bottom: 40px;
}

.not-service-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.not-service-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.not-service-tag {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--signal-red);
  border: 1px solid var(--signal-red);
  padding: 2px 8px;
  border-radius: 2px;
  margin-top: 2px;
}

.not-service-content {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.delivery-section {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 24px;
}

.delivery-section h2 {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.delivery-section p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.delivery-section a {
  color: var(--warn-yellow);
  border-bottom: 1px solid var(--warn-yellow);
  transition: color 0.2s;
}

.delivery-section a:hover {
  color: var(--text-light);
  border-color: var(--text-light);
}

/* ---------- 工作方法页 method ---------- */
.page-method .layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.method-path-section {
  margin-bottom: 40px;
}

.content-media-inline {
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.content-media-inline img {
  aspect-ratio: 16 / 9;
}

.content-media-inline figcaption {
  padding: 10px 12px;
  background-color: var(--bg-dark-light);
}

.method-step {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--bg-terminal);
  border: 1px solid var(--warn-yellow);
  color: var(--warn-yellow);
  font-size: 14px;
  border-radius: 2px;
  flex-shrink: 0;
}

.step-head h3 {
  font-size: 18px;
  color: var(--text-light);
  font-weight: 600;
}

.method-step > p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.delivery-table-section {
  margin-bottom: 40px;
}

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

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.boundary-label {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--warn-yellow);
  border: 1px solid var(--warn-yellow);
  padding: 2px 8px;
  border-radius: 2px;
  font-family: var(--font-mono);
  margin-top: 2px;
}

.boundary-list li p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ---------- 工作简报页 briefs ---------- */
.page-briefs .page-container {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.briefs-tag-index {
  margin-bottom: 40px;
}

.tag-index-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 16px;
  max-width: 720px;
}

.tag-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-index-list li a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 16px;
  font-size: 14px;
  color: var(--text-muted);
  border: 1px solid var(--border-pixel-light);
  border-radius: 999px;
  transition: color 0.2s, border-color 0.2s;
}

.tag-index-list li a:hover {
  color: var(--warn-yellow);
  border-color: var(--warn-yellow);
}

.briefs-list-section {
  margin-bottom: 48px;
}

.brief-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-pixel);
  align-items: start;
}

.brief-item-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.brief-item-meta time {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.brief-item h3 {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 8px;
  font-weight: 600;
}

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

.brief-figure {
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 12px;
  max-width: 320px;
}

.brief-figure img {
  aspect-ratio: 4 / 3;
}

.brief-detail-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--warn-yellow);
}

.brief-detail-link:hover {
  color: var(--text-light);
}

.brief-detail-link::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-mono);
}

.brief-details-section {
  margin-bottom: 40px;
}

.details-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.brief-detail-item {
  border-bottom: 1px solid var(--border-pixel);
}

.brief-detail-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  min-height: 44px;
  list-style: none;
}

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

.brief-detail-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--warn-yellow);
  flex-shrink: 0;
  transition: transform 0.2s;
}

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

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

.detail-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* ---------- 责任与角色页 responsible ---------- */
.page-responsible .page-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

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

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

.role-card {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 20px;
}

.role-card h3 {
  font-size: 17px;
  color: var(--text-light);
  margin-bottom: 10px;
  font-weight: 600;
  font-family: var(--font-mono);
}

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

.role-method {
  font-size: 13px;
  color: var(--verify-green);
  font-family: var(--font-mono);
  padding-top: 10px;
  border-top: 1px solid var(--border-pixel);
}

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

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

.review-step {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.step-label {
  display: inline-block;
  font-size: 12px;
  color: var(--warn-yellow);
  margin-bottom: 8px;
}

.review-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

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

.representative-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.representative-item {
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.rep-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--verify-green);
  border: 1px solid var(--verify-green);
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 8px;
}

.representative-item h3 {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 6px;
  font-weight: 600;
}

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

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

.content-figure {
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
  max-width: 480px;
}

.content-figure img {
  aspect-ratio: 4 / 3;
}

.content-figure figcaption {
  padding: 8px 12px;
  background-color: var(--bg-dark-light);
}

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

.collaboration-section a {
  color: var(--warn-yellow);
  border-bottom: 1px solid var(--warn-yellow);
  transition: color 0.2s;
}

.collaboration-section a:hover {
  color: var(--text-light);
  border-color: var(--text-light);
}

/* ---------- FAQ 页 ---------- */
.page-faq .page-title-block {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
}

.faq-section {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
  margin-bottom: 40px;
}

.faq-phase {
  font-size: 16px;
  color: var(--warn-yellow);
  margin: 28px 0 8px;
  font-family: var(--font-mono);
  font-weight: 500;
}

.faq-phase:first-of-type {
  margin-top: 0;
}

.faq-limits {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
  margin-bottom: 40px;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius);
  padding: 24px;
}

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

.faq-entry-guide {
  width: min(var(--container-w), 100% - 48px);
  margin-inline: auto;
  margin-bottom: 40px;
}

.guide-figure {
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
  max-width: 480px;
}

.guide-image {
  aspect-ratio: 4 / 3;
}

.guide-figure figcaption {
  padding: 8px 12px;
  background-color: var(--bg-dark-light);
}

.faq-entry-guide p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 640px;
}

/* ---------- 合作入口页 cooperation ---------- */
.page-cooperation .layout-shell {
  display: block;
}

.page-cooperation .page-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

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

.cooperation-section h2 {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
}

.premise-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.premise-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background-color: var(--bg-dark-light);
  border: 1px solid var(--border-pixel);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.premise-item::before {
  content: "▸";
  color: var(--verify-green);
  font-family: var(--font-mono);
  flex-shrink: 0;
  margin-top: 2px;
}

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

/* ---------- 404 页 ---------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

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

.error-code {
  font-size: 64px;
  color: var(--signal-red);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 24px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   6. Responsive — 响应式断点
   ============================================================ */

/* ---------- 平板 1024px ---------- */
@media (max-width: 1024px) {
  .direction-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

  .role-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .review-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .page-layout,
  .page-method .layout-shell,
  .page-services .page-layout,
  .page-responsible .page-layout,
  .page-cooperation .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }
}

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

  .brand-slogan {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .site-nav {
    position: static;
  }

  .nav-list {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--bg-dark);
    border-bottom: 2px solid var(--border-pixel);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    display: none;
    gap: 0;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link,
  .nav-dropdown-toggle {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    font-size: 15px;
  }

  .nav-link.is-current {
    box-shadow: inset 2px 0 0 var(--warn-yellow);
  }

  .has-dropdown {
    display: flex;
    flex-wrap: wrap;
  }

  .nav-dropdown-toggle {
    flex: 1;
  }

  .dropdown-menu {
    position: static;
    display: none;
    width: 100%;
    box-shadow: none;
    border: none;
    padding: 0 0 4px 12px;
    background-color: transparent;
  }

  .has-dropdown:hover .dropdown-menu,
  .has-dropdown:focus-within .dropdown-menu,
  .has-dropdown .dropdown-menu.is-open {
    display: block;
  }

  .dropdown-menu li a {
    min-height: 40px;
    padding: 8px 12px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 0 24px;
  }

  /* 首页 Hero */
  .hero-section {
    padding: 40px 0;
  }

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

  .hero-text h1 {
    font-size: 28px;
  }

  .hero-visual {
    order: 2;
  }

  /* 首页模块 */
  .recent-briefs-section,
  .service-boundary-summary,
  .faq-preview {
    padding: 40px 0;
  }

  .brief-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px 0;
  }

  .brief-meta {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

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

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

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

  .cooperation-cta {
    padding: 40px 0;
  }

  .cta-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cta-visual {
    order: 2;
  }

  /* 内页布局 */
  .inner-main {
    padding: 24px 0 48px;
  }

  .page-title {
    font-size: 26px;
  }

  .page-layout,
  .page-method .layout-shell,
  .page-services .page-layout,
  .page-responsible .page-layout,
  .page-cooperation .page-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .content-sidebar,
  .sidebar-area,
  .sidebar {
    margin-top: 32px;
  }

  /* 服务页 */
  .scope-list {
    grid-template-columns: 1fr;
  }

  /* 工作方法页 */
  .method-step {
    padding: 20px;
  }

  .step-head {
    align-items: flex-start;
  }

  /* 简报页 */
  .brief-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 0;
  }

  .brief-item-meta {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  /* 责任页 */
  .role-grid {
    grid-template-columns: 1fr;
  }

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

  /* 相关链接 */
  .related-links {
    align-items: flex-start;
    flex-direction: column;
  }

  .related-links-label {
    margin-bottom: 4px;
  }
}

/* ---------- 小屏手机 390px ---------- */
@media (max-width: 390px) {
  .hero-text h1 {
    font-size: 24px;
  }

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

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

  .footer-inner {
    gap: 24px;
  }

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

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

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