/* ============================================================
   suhaodian.com — 91吃瓜网址 整站样式
   轻量移动应用风 + 展览目录感
   ============================================================ */

/* ------------------------------------------------------------
   Base — 基础变量、重置、字体、颜色
   ------------------------------------------------------------ */
:root {
  --color-primary: #2D4A6B;
  --color-primary-dark: #223A55;
  --color-bg: #F5F7FA;
  --color-white: #FFFFFF;
  --color-accent: #D97A3D;
  --color-accent-dark: #C26A30;
  --color-text: #1F2933;
  --color-text-light: #5A6B7C;
  --color-text-faint: #8A9AA8;
  --color-border: #E3E8EE;
  --color-border-light: #EAF0F5;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(31, 41, 51, 0.06);
  --shadow-md: 0 2px 8px rgba(31, 41, 51, 0.08);
  --shadow-lg: 0 4px 16px rgba(31, 41, 51, 0.10);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --container-width: 1200px;
  --header-height: 64px;
  --content-max: 1200px;
}

*,
*::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-sans);
  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 {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 0;
}

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

/* 数字等宽 */
.status-value,
.node-index,
.step-number,
.service-index,
.timeline-index,
.principle-num,
.error-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------
   Layout — 全站骨架、容器、页头、页脚
   ------------------------------------------------------------ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

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

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.01em;
}

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

.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-light);
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(45, 74, 107, 0.06);
}

.nav-link.is-current {
  color: var(--color-primary);
  background-color: rgba(45, 74, 107, 0.10);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  min-height: 44px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
}

.menu-icon {
  display: inline-block;
  width: 16px;
  height: 14px;
  position: relative;
}

.menu-icon::before,
.menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
}

.menu-icon::before {
  top: 2px;
  box-shadow: 0 5px 0 currentColor;
}

.menu-icon::after {
  bottom: 2px;
}

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

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

.site-main.inner-main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

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

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

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

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-text-light);
  max-width: 360px;
  line-height: 1.7;
}

.footer-links {
  padding-top: 4px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--color-text-light);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-faint);
}

/* ------------------------------------------------------------
   Components — 通用组件：按钮、面包屑、卡片、列表、表单等
   ------------------------------------------------------------ */
/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--color-text-faint);
}

.breadcrumb a {
  color: var(--color-text-light);
  font-size: 14px;
}

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

.breadcrumb-sep {
  color: var(--color-text-faint);
  font-size: 12px;
}

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

/* 页面标题区 */
.page-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
}

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

/* 页面引导段 */
.page-heading {
  margin-bottom: 40px;
}

.page-lead,
.page-heading-desc,
.page-intro {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 760px;
  line-height: 1.8;
}

/* 区块标题 */
.section-title,
.section-heading h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.section-kicker {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.section-lead,
.section-desc,
.block-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 720px;
}

/* 相关链接条 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-light);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: 4px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  background-color: rgba(45, 74, 107, 0.06);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.related-links-item:hover {
  background-color: rgba(45, 74, 107, 0.12);
  color: var(--color-primary);
}

/* 侧栏 */
.aside-nav {
  min-width: 0;
}

.aside-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.aside-list,
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-list a,
.aside-links a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text-light);
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.aside-list a:hover,
.aside-links a:hover {
  background-color: rgba(45, 74, 107, 0.06);
  color: var(--color-primary);
}

/* 通用边界列表 */
.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 图片容器约束 */
figure {
  margin: 0;
}

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

/* ------------------------------------------------------------
   Pages — 首页
   ------------------------------------------------------------ */
.site-home {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* Hero 状态总览 */
.hero-status {
  padding: 48px 0 32px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

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

.hero-lead {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-border-light);
  aspect-ratio: 4 / 3;
}

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

/* 状态小卡条 */
.status-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.status-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.status-label {
  display: block;
  font-size: 14px;
  color: var(--color-text-faint);
  margin-bottom: 6px;
}

.status-value {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

/* 异常列表 */
.issues-section {
  padding: 48px 0;
}

.section-heading {
  margin-bottom: 28px;
}

.issues-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.issue-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.issue-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-text);
}

.issue-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 服务预览 */
.services-preview {
  padding: 48px 0;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 20px;
  align-items: stretch;
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-primary);
}

.service-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background-color: var(--color-border-light);
}

.service-card h3 {
  font-size: 18px;
  margin: 16px 20px 8px;
  color: var(--color-text);
}

.service-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0 20px 16px;
  flex: 1;
}

.card-link {
  display: inline-block;
  margin: 0 20px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

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

/* 方法预览时间线 */
.method-preview {
  padding: 48px 0;
}

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

.timeline-preview::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 10%;
  right: 10%;
  height: 2px;
  background-color: var(--color-border);
}

.timeline-node {
  position: relative;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.timeline-node:hover {
  box-shadow: var(--shadow-md);
}

.node-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.timeline-node h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-node p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 合作引导 */
.cooperation-cta {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin: 48px 0 16px;
  text-align: center;
}

.cta-text {
  font-size: 20px;
  color: var(--color-white);
  margin-bottom: 24px;
  line-height: 1.6;
}

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

.cooperation-cta .btn-secondary {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--color-white);
}

.cooperation-cta .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

/* ------------------------------------------------------------
   Pages — 服务能力 services.html
   ------------------------------------------------------------ */
.page-layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 40px;
  align-items: start;
}

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

/* 服务列表 */
.service-list {
  margin-bottom: 48px;
}

.service-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  margin-bottom: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.service-item:hover {
  box-shadow: var(--shadow-md);
}

.service-item-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px 0;
}

.service-index {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(217, 122, 61, 0.10);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.service-title {
  font-size: 20px;
  color: var(--color-text);
}

.service-figure {
  margin: 20px 24px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 7;
  background-color: var(--color-border-light);
}

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

.service-body {
  padding: 20px 24px 24px;
}

.service-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-meta {
  margin-bottom: 12px;
}

.meta-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.meta-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.meta-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 服务边界 */
.service-boundary {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 32px;
}

/* ------------------------------------------------------------
   Pages — 信息源目录 sources.html
   ------------------------------------------------------------ */
.page-container {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* 来源概览 */
.source-overview {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

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

.overview-text p:last-child {
  margin-bottom: 0;
}

.overview-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-border-light);
  box-shadow: var(--shadow-md);
}

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

/* 来源分层表 */
.source-table-section {
  margin-bottom: 48px;
}

.table-wrap {
  overflow-x: auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.source-table {
  width: 100%;
  min-width: 720px;
  font-size: 14px;
}

.source-table thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  font-size: 14px;
}

.source-table tbody td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-light);
  line-height: 1.7;
  vertical-align: top;
}

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

.source-table tbody tr:hover {
  background-color: rgba(45, 74, 107, 0.03);
}

/* 行业场景卡片 */
.scenario-section {
  margin-bottom: 48px;
}

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

.scenario-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.scenario-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.scenario-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 合规说明 */
.compliance-section {
  margin-bottom: 48px;
}

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

.compliance-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 来源页相关卡片 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.related-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.related-card-desc {
  font-size: 13px;
  color: var(--color-text-faint);
  line-height: 1.5;
}

/* ------------------------------------------------------------
   Pages — 事件脉络 events.html
   ------------------------------------------------------------ */
/* 方法介绍 */
.method-intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.method-copy h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.method-copy p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 14px;
}

.method-copy p:last-child {
  margin-bottom: 0;
}

.method-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-border-light);
  box-shadow: var(--shadow-md);
}

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

.method-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-faint);
  background-color: var(--color-white);
}

/* 时间线 */
.timeline-block {
  margin-bottom: 48px;
}

.timeline-list {
  position: relative;
  padding-left: 0;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  margin-bottom: 24px;
}

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

.timeline-index {
  position: absolute;
  left: 0;
  top: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  z-index: 1;
  box-shadow: var(--shadow-sm);
}

.timeline-body {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.timeline-body:hover {
  box-shadow: var(--shadow-md);
}

.timeline-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-action {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 6px;
}

.timeline-output {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

/* 来源核对原则 */
.source-check {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 48px;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.principle-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.principle-list strong {
  color: var(--color-primary);
  font-weight: 600;
  flex-shrink: 0;
  min-width: 72px;
}

/* 成果交付 */
.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.deliverable-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.deliverable-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.deliverable-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 相关入口 */
.related-entries {
  margin-top: 48px;
}

.related-entries .related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  border-top: none;
  padding-top: 0;
}

.related-link {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-link:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

/* ------------------------------------------------------------
   Pages — 合作方式 cooperation.html
   ------------------------------------------------------------ */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 40px;
  align-items: start;
  padding: 40px 0 64px;
}

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

/* 步骤 */
.process-steps {
  margin-bottom: 48px;
}

.step-item {
  display: flex;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.step-item:hover {
  box-shadow: var(--shadow-md);
}

.step-number {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
}

.step-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

/* 边界与反馈 */
.boundary-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 48px;
}

.feedback-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* 侧栏卡片 */
.aside-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.aside-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* 合作页内联图片 */
.content-media-inline {
  margin-bottom: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

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

.content-media-inline figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-faint);
  background-color: var(--color-white);
}

/* ------------------------------------------------------------
   Pages — 常见问题 faq.html
   ------------------------------------------------------------ */
/* FAQ 分组 */
.faq-group {
  margin-bottom: 48px;
}

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

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-primary);
  font-weight: 400;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 24px 20px;
  border-top: 1px solid var(--color-border-light);
  padding-top: 16px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* FAQ 配图 */
.faq-media {
  margin: 48px 0;
}

.faq-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

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

.faq-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-faint);
  background-color: var(--color-white);
}

/* 更多联系 */
.more-contact {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.more-contact p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

/* FAQ 页侧栏 */
.layout-shell .aside-nav {
  min-width: 0;
}

/* ------------------------------------------------------------
   Pages — 关于我们 about.html
   ------------------------------------------------------------ */
/* 品牌介绍 */
.intro-block {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.intro-text h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.intro-text p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 14px;
}

.intro-text p:last-child {
  margin-bottom: 0;
}

.intro-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-border-light);
  box-shadow: var(--shadow-md);
}

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

/* 工作原则 */
.principles-block {
  margin-bottom: 48px;
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.principle-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: rgba(45, 74, 107, 0.10);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

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

.principle-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 服务边界 */
.boundary-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 32px;
}

/* ------------------------------------------------------------
   Pages — 404
   ------------------------------------------------------------ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - 200px);
  padding: 48px 24px;
}

.error-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

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

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

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

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

/* ------------------------------------------------------------
   Responsive — 响应式断点
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-figure {
    aspect-ratio: 16 / 9;
    max-width: 640px;
  }

  .source-overview,
  .method-intro,
  .intro-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .aside-nav {
    order: 2;
  }
}

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

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 0;
    display: none;
  }

  .main-nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    padding: 12px 16px;
    gap: 0;
  }

  .nav-list li {
    border-bottom: 1px solid var(--color-border-light);
  }

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

  .nav-link {
    padding: 14px 12px;
    font-size: 16px;
    border-radius: 0;
  }

  .nav-link.is-current {
    background-color: transparent;
    color: var(--color-accent);
  }

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

  .status-strip {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

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

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

  .timeline-preview::before {
    display: none;
  }

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

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

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

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

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

  .related-entries .related-links {
    grid-template-columns: 1fr;
  }

  .site-main.inner-main {
    padding: 24px 16px 48px;
  }

  .page-layout {
    padding: 24px 16px 48px;
  }

  .container {
    padding: 0 16px;
  }

  .layout-shell {
    padding: 24px 0 48px;
  }

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

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

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

  .cooperation-cta {
    padding: 28px 20px;
  }

  .cta-text {
    font-size: 17px;
  }

  .step-item {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

  .service-item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 16px 16px 0;
  }

  .service-figure {
    margin: 16px 16px 0;
  }

  .service-body {
    padding: 16px;
  }

  .timeline-item {
    padding-left: 56px;
  }

  .timeline-index {
    width: 40px;
    height: 40px;
    font-size: 14px;
  }

  .faq-item summary {
    padding: 16px 16px;
    padding-right: 40px;
    font-size: 15px;
  }

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

  .brand-tagline {
    display: none;
  }
}

@media (max-width: 480px) {
  .footer-bottom {
    padding: 14px 16px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  .btn-primary,
  .btn-secondary {
    min-height: 44px;
    padding: 0 20px;
    font-size: 14px;
  }

  .hero-status {
    padding: 32px 0 24px;
  }

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

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

  .status-card {
    padding: 16px 20px;
  }

  .issue-card {
    padding: 20px 16px;
  }

  .service-card h3 {
    font-size: 17px;
    margin: 14px 16px 6px;
  }

  .service-card p {
    margin: 0 16px 14px;
  }

  .card-link {
    margin: 0 16px 16px;
  }

  .timeline-node {
    padding: 20px;
  }

  .cooperation-cta {
    margin: 32px 0 12px;
  }

  .source-table thead th,
  .source-table tbody td {
    padding: 12px 14px;
  }

  .scenario-card,
  .deliverable-card,
  .principle-card {
    padding: 20px;
  }

  .boundary-note,
  .service-boundary,
  .source-check,
  .boundary-block {
    padding: 20px;
  }

  .method-copy h2,
  .intro-text h2 {
    font-size: 20px;
  }

  .step-body h3 {
    font-size: 16px;
  }
}

/* 滚动出现动画 — 仅增强，不影响初始可见性 */
@media (prefers-reduced-motion: no-preference) {
  .status-card,
  .issue-card,
  .service-card,
  .timeline-node,
  .scenario-card,
  .deliverable-card,
  .principle-card,
  .step-item,
  .faq-item {
    transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  }
}