:/* ==========================================================================
   黑料网入口 · 全站样式表
   版本：1.0
   说明：覆盖 index / about / services / research / process / faq / archive / 404
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base — 基础变量与重置
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1A365D;
  --color-primary-light: #2C5282;
  --color-primary-dark: #14294A;
  --color-accent: #E07B39;
  --color-accent-dark: #C96A2C;
  --color-bg: #FFFFFF;
  --color-bg-light: #F5F7FA;
  --color-text: #2D3748;
  --color-text-light: #4A5568;
  --color-border: #E2E8F0;
  --color-white: #FFFFFF;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(26, 54, 93, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 54, 93, 0.1);
  --shadow-hover: 0 8px 24px rgba(26, 54, 93, 0.12);
  --transition-base: 0.2s ease;
  --transition-smooth: 0.3s ease;
}

*,
*::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-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

img {
  object-fit: cover;
}

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

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

ul,
ol {
  list-style: none;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

/* --------------------------------------------------------------------------
   Layout — 全站骨架
   -------------------------------------------------------------------------- */

/* 站点主容器 */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 页头 */
.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;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.logo-link:hover {
  color: var(--color-primary);
}

.logo-text {
  letter-spacing: 0.02em;
}

.logo-slogan {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  border-left: 1px solid var(--color-border);
  padding-left: 12px;
  white-space: nowrap;
}

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

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

.nav-item {
  display: block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-item:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-light);
}

.nav-item.is-current {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-item.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-top {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.footer-slogan {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

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

.footer-compliance p {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.875rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

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

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

/* 内页统一外壳 */
.inner-main {
  padding-bottom: 64px;
}

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 8px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.page-title-area {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 32px;
}

.page-intro {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 780px;
}

/* 通用区块标题 */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}

.section-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-top: 8px;
}

/* 通用图片容器 */
.content-figure,
.content-media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-light);
}

.content-figure img,
.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-figure figcaption,
.content-media figcaption {
  padding: 10px 16px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  background-color: var(--color-bg-light);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Components — 通用组件
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base), color 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: var(--color-accent-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

/* 卡片通用 */
.service-card,
.research-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.service-card:hover,
.research-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
}

.card-link:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 步骤编号 */
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* 相关链接条 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.related-links-item {
  font-size: 0.875rem;
  color: var(--color-text-light);
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

/* 表格通用 */
.update-table {
  width: 100%;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
}

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

.update-table th {
  background-color: var(--color-bg-light);
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.update-table td {
  color: var(--color-text);
}

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

.update-table tbody tr:hover {
  background-color: var(--color-bg-light);
}

/* --------------------------------------------------------------------------
   Pages — 首页
   -------------------------------------------------------------------------- */

/* 首屏 hero */
.hero-section {
  background-color: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
}

.hero-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.hero-issue {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  background-color: rgba(224, 123, 57, 0.1);
  padding: 6px 14px;
  border-radius: 999px;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  max-width: 560px;
}

.hero-description {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* 首屏下方配图 */
.content-media-primary {
  max-width: var(--container-width);
  margin: -32px auto 0;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.content-media-primary img {
  aspect-ratio: 16 / 5;
  width: 100%;
}

/* 服务矩阵 */
.services-matrix {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 24px;
}

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

.section-intro {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-top: 8px;
  max-width: 640px;
}

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

.matrix-grid .service-card {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 220px;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.card-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  flex: 1;
}

/* 专题研究摘要 */
.research-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

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

.research-list .research-card {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.research-date {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.research-item-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

.research-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  flex: 1;
}

/* 更新记录 */
.updates-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.updates-list {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.update-item {
  display: flex;
  gap: 24px;
  padding: 16px 24px;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.update-item:last-child {
  border-bottom: none;
}

.update-item:hover {
  background-color: var(--color-bg-light);
}

.update-date {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  white-space: nowrap;
  min-width: 88px;
  font-variant-numeric: tabular-nums;
}

.update-desc {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* 合作流程速览 */
.process-snapshot {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

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

.step-item {
  padding: 28px 24px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.step-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.step-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.step-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.section-link {
  display: inline-block;
  margin-top: 24px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
}

.section-link:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 规则说明 */
.rules-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.rules-box {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.rules-box p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.rules-box a {
  color: var(--color-accent);
  font-weight: 500;
}

.rules-box a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Pages — 关于我们
   -------------------------------------------------------------------------- */

/* 服务理念 */
.philosophy-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.philosophy-media {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

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

.philosophy-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.principle-item {
  padding: 20px 24px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.principle-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.principle-item p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 团队与方法论 */
.team-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

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

.team-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.team-content p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* 合规声明 */
.compliance-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.compliance-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.compliance-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.compliance-list li {
  padding: 16px 20px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
  position: relative;
  padding-left: 44px;
}

.compliance-list li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 16px;
  color: var(--color-accent);
  font-weight: 700;
}

/* 关于页相关链接 */
.related-links h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

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

.related-list a {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.related-list a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Pages — 服务目录
   -------------------------------------------------------------------------- */

/* 字母索引条 */
.index-bar {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.index-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.index-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.index-tag {
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-text-light);
  background-color: var(--color-white);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.index-tag:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* 服务分组 */
.service-groups {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.service-group {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.group-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-primary);
}

.group-header h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.group-header p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

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

.group-grid .service-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-light);
}

.group-grid .service-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.group-grid .service-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.applicable {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  padding-top: 8px;
  border-top: 1px dashed var(--color-border);
}

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

/* 服务使用说明 */
.service-usage {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.service-usage h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.service-usage p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 760px;
}

.service-usage a {
  color: var(--color-accent);
  font-weight: 500;
}

.service-usage a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Pages — 专题研究
   -------------------------------------------------------------------------- */

/* 时期索引 */
.period-index {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 24px;
}

.period-tabs {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.period-tab {
  padding: 10px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-white);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  min-height: 44px;
}

.period-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.period-tab.is-active {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* 文章列表 */
.article-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.article-list .research-card {
  padding: 32px;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

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

.research-meta time {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.category-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  background-color: var(--color-bg-light);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

.research-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.research-content {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 32px;
  align-items: start;
}

.research-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.research-text h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 8px;
}

.research-text p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.research-figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.research-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.research-figure figcaption {
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--color-text-light);
  background-color: var(--color-bg-light);
}

.read-more {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
}

.read-more:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 更新记录 */
.update-records {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.update-records h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
   Pages — 合作流程
   -------------------------------------------------------------------------- */

.process-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.process-section .process-steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.process-step {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.process-step .step-number {
  width: 56px;
  height: 56px;
  font-size: 1.375rem;
  background-color: var(--color-primary);
}

.step-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.step-content > p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.deliverable-box {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.deliverable-box h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.deliverable-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.deliverable-box li {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

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

.rule-note {
  padding: 12px 16px;
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-bg-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.rule-note h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  margin-bottom: 4px;
}

.rule-note p {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 合作流程配图 */
.process-image-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.process-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.process-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.process-figure figcaption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  background-color: var(--color-bg-light);
}

/* 相关链接卡片 */
.related-links-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.related-links-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
}

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

.related-link-card {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.related-link-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.related-link-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.related-link-card p {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Pages — 常见问题
   -------------------------------------------------------------------------- */

.page-title-block {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 32px;
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 32px;
  align-items: center;
}

.page-title-block p {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

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

/* FAQ 分组 */
.faq-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.faq-group-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: 20px;
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background-color var(--transition-base);
}

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

.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-smooth);
}

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

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

.faq-answer {
  padding: 0 20px 16px;
}

.faq-answer p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 规则说明 */
.rules-block {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.rules-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.rules-content {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.rules-content p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

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

/* --------------------------------------------------------------------------
   Pages — 资料档案
   -------------------------------------------------------------------------- */

/* 资料来源概览 */
.source-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.source-overview h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.source-card {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.source-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.source-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.source-limit {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  background-color: var(--color-bg-light);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  border-left: 3px solid var(--color-accent);
}

/* 校验流程 */
.verify-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.verify-steps h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.verify-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
  list-style: none;
  counter-reset: verify-counter;
}

.verify-item {
  padding: 24px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  gap: 16px;
}

.verify-item .step-number {
  background-color: var(--color-accent);
}

.step-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 更新记录表（档案页） */
.update-records h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* 使用规则 */
.use-rules {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.use-rules h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.use-rules .rules-box {
  margin-top: 24px;
}

.rules-box h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  margin-top: 16px;
}

.rules-box h3:first-child {
  margin-top: 0;
}

.rules-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.rules-list:last-child {
  margin-bottom: 0;
}

.rules-list li {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.rules-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   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: 520px;
}

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.error-section h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  min-height: 44px;
  line-height: 1.5;
  transition: background-color var(--transition-base);
}

.error-link:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Responsive — 响应式
   -------------------------------------------------------------------------- */

/* 平板：≤992px */
@media (max-width: 992px) {
  .header-inner {
    padding: 0 20px;
  }

  .logo-slogan {
    display: none;
  }

  .nav-item {
    padding: 8px 10px;
    font-size: 0.875rem;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px;
  }

  .hero-figure {
    max-width: 640px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .content-media-primary {
    margin-top: -16px;
    padding: 0 20px;
  }

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

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

  .philosophy-section,
  .team-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .philosophy-media {
    position: static;
  }

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

  .page-title-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .process-step {
    grid-template-columns: 56px 1fr;
    padding: 24px;
  }

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

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

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

/* 手机：≤576px */
@media (max-width: 576px) {
  .header-inner {
    height: auto;
    min-height: var(--header-height);
    padding: 12px 16px;
    flex-wrap: wrap;
  }

  .logo-area {
    width: 100%;
    justify-content: space-between;
  }

  .logo-link {
    font-size: 1.25rem;
  }

  .main-nav {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-list {
    gap: 2px;
    padding-bottom: 4px;
  }

  .nav-item {
    padding: 8px 12px;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  .nav-item.is-current::after {
    left: 12px;
    right: 12px;
  }

  .breadcrumb {
    padding: 12px 16px 0;
    font-size: 0.8125rem;
  }

  .page-header {
    padding: 24px 16px 8px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .page-title-area {
    padding: 8px 16px 24px;
  }

  .page-intro {
    font-size: 0.9375rem;
  }

  .hero-container {
    padding: 32px 16px;
  }

  .hero-title {
    font-size: 1.625rem;
  }

  .hero-description {
    font-size: 0.9375rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .content-media-primary {
    padding: 0 16px;
  }

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

  .services-matrix,
  .research-preview,
  .updates-section,
  .process-snapshot,
  .rules-section {
    padding: 40px 16px 24px;
  }

  .matrix-grid,
  .research-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .update-item {
    flex-direction: column;
    gap: 4px;
    padding: 16px;
  }

  .update-date {
    min-width: 0;
  }

  .rules-box {
    padding: 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

  .index-bar {
    padding: 8px 16px 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .service-groups {
    padding: 0 16px 40px;
    gap: 40px;
  }

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

  .service-usage {
    padding: 0 16px 40px;
  }

  .period-index {
    padding: 0 16px 16px;
  }

  .period-tabs {
    gap: 8px;
  }

  .period-tab {
    padding: 8px 16px;
    font-size: 0.8125rem;
  }

  .article-list {
    padding: 0 16px 40px;
    gap: 24px;
  }

  .article-list .research-card {
    padding: 20px;
  }

  .research-title {
    font-size: 1.125rem;
  }

  .research-content {
    gap: 16px;
  }

  .update-records {
    padding: 0 16px 40px;
  }

  .table-wrapper,
  .table-wrap {
    overflow-x: auto;
  }

  .update-table {
    min-width: 560px;
  }

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

  .process-step {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px;
  }

  .process-step .step-number {
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
  }

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

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

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

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

  .page-title-block {
    padding: 8px 16px 24px;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .faq-section {
    padding: 0 16px 40px;
    gap: 32px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 0.875rem;
  }

  .faq-answer {
    padding: 0 16px 14px;
  }

  .rules-block {
    padding: 0 16px 40px;
  }

  .rules-content {
    padding: 20px;
  }

  .source-overview,
  .verify-steps,
  .use-rules {
    padding: 0 16px 40px;
  }

  .source-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 16px;
  }

  .verify-list {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 16px;
  }

  .verify-item {
    padding: 20px;
  }

  .related-links {
    padding: 16px;
    gap: 12px;
  }

  .related-links-item {
    padding: 6px 10px;
    font-size: 0.8125rem;
  }

  .compliance-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .error-section h1 {
    font-size: 1.25rem;
  }
}