/* ============================================================
   黑料网吃瓜网 · 整站样式表
   城市服务风 · 温和蓝色 · 公共信息感
   ============================================================ */

/* ============================================================
   1. Base — 变量、重置、全局基础
   ============================================================ */
:root {
  --color-primary: #2F5B8F;
  --color-primary-dark: #244A73;
  --color-primary-light: #EAF1F7;
  --color-accent: #D98324;
  --color-text: #1F2D3D;
  --color-text-light: #5A6B7C;
  --color-bg: #F7F9FC;
  --color-white: #FFFFFF;
  --color-border: #DCE4EC;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --container-width: 1200px;
  --content-width: 960px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;

  --breakpoint-mobile: 768px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: var(--space-sm);
}

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

/* --- 全站容器 --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
  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 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.logo-area {
  flex-shrink: 0;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0;
}

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

.logo-text {
  white-space: nowrap;
}

/* --- 主导航 --- */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

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

.nav-item {
  position: relative;
}

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

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

.nav-link.is-current {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.nav-link.is-current:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

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

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

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

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.footer-col h4 {
  font-size: 16px;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

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

.footer-links a {
  font-size: 14px;
  color: var(--color-text-light);
  transition: color 0.2s ease;
}

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

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

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.footer-note {
  font-size: 13px;
  color: var(--color-text-light);
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- 主内容 --- */
.site-main {
  flex: 1;
}

/* --- 面包屑 --- */
.breadcrumb {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) 0;
  font-size: 14px;
  color: var(--color-text-light);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--color-text-light);
}

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

/* --- 内页标题区 --- */
.page-title-area {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) var(--space-lg);
}

.page-description,
.page-desc,
.page-intro {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.page-header {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) 0;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

/* --- 内页布局 --- */
.inner-main {
  padding-bottom: var(--space-2xl);
}

.page-layout {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-xl);
  align-items: start;
}

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

/* --- 侧栏 --- */
.aside-content,
.sidebar-area {
  min-width: 0;
}

.aside-card,
.sidebar-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.aside-card h2,
.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.aside-links li,
.sidebar-links li,
.index-nav li {
  margin-bottom: 4px;
}

.aside-links a,
.sidebar-links a,
.index-nav a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.aside-links a:hover,
.sidebar-links a:hover,
.index-nav a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.aside-figure,
.sidebar-figure {
  margin-top: var(--space-md);
}

.aside-figure img,
.sidebar-figure img {
  width: 100%;
  border-radius: var(--radius-md);
}

.aside-figure figcaption,
.sidebar-figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: var(--space-xs) 0;
  text-align: center;
}

/* ============================================================
   3. Components — 通用组件
   ============================================================ */

/* --- 按钮 --- */
.btn-primary,
.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  min-height: 44px;
}

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

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

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

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

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-primary);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* --- 文本链接 --- */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 0;
}

.text-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.text-link:hover::after {
  transform: translateX(4px);
}

/* --- 区块标题 --- */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  max-width: 720px;
}

.section-lead {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

/* --- 区块块 --- */
.section-block {
  padding: var(--space-2xl) 0;
}

/* --- FAQ 折叠 --- */
.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
}

.faq-item summary {
  padding: var(--space-md);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

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

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

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

.faq-item summary:hover {
  background-color: var(--color-primary-light);
}

.faq-answer,
.faq-content {
  padding: 0 var(--space-md) var(--space-md);
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.faq-content p {
  margin-bottom: 0;
}

/* --- 信息提示面板 --- */
.info-panel,
.compliance-panel,
.claim-panel {
  background-color: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
}

.panel-intro,
.panel-lead {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

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

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: var(--space-xs) 0;
  text-align: center;
}

/* ============================================================
   4. Pages — 页面专属样式
   ============================================================ */

/* ============================================================
   4.1 首页 index.html
   ============================================================ */

/* --- Hero 首屏 --- */
.hero-banner {
  background-color: var(--color-primary-light);
  padding: var(--space-2xl) 0;
}

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.hero-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.hero-path {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.path-step {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
}

.step-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.step-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

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

.hero-figure img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(47, 91, 143, 0.12);
}

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

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.service-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(47, 91, 143, 0.08);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.card-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
}

.card-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* --- 企业介绍 --- */
.company-intro {
  background-color: var(--color-bg);
}

.intro-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

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

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

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

/* --- 典型场景 --- */
.typical-scenarios {
  background-color: var(--color-white);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.scenario-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color 0.2s ease;
}

.scenario-item:hover {
  border-color: var(--color-primary);
}

.scenario-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.scenario-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.scenario-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.scenario-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.scenario-link:hover::after {
  transform: translateX(4px);
}

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

.steps-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.step-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step-brief {
  display: block;
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.steps-more {
  text-align: center;
}

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

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.faq-more-link {
  text-align: center;
}

/* --- 更新入口 --- */
.update-entry {
  background-color: var(--color-primary);
}

.update-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.update-text {
  font-size: 16px;
  color: var(--color-white);
  margin-bottom: 0;
}

.update-entry .btn-ghost {
  border-color: var(--color-white);
  color: var(--color-white);
  flex-shrink: 0;
}

.update-entry .btn-ghost:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* ============================================================
   4.2 服务矩阵 hlwcgw/services.html
   ============================================================ */

.page-services {
  background-color: var(--color-bg);
}

.service-categories,
.service-tiers {
  margin-bottom: var(--space-xl);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.service-group {
  margin-bottom: var(--space-lg);
}

.service-group:last-child {
  margin-bottom: 0;
}

.service-group h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-primary-light);
}

.service-list {
  padding-left: 0;
}

.service-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  transition: border-left-color 0.2s ease;
  border-left: 3px solid transparent;
  padding-left: var(--space-sm);
}

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

.service-item:hover {
  border-left-color: var(--color-primary);
}

.service-item-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.service-item strong {
  display: block;
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 2px;
}

.tier-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.tier-block {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.tier-block h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.tier-apply {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.tier-list {
  padding-left: var(--space-md);
}

.tier-list li {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  position: relative;
  padding-left: var(--space-sm);
  margin-bottom: 6px;
}

.tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* ============================================================
   4.3 分析方法 hlwcgw/method.html
   ============================================================ */

.page-method {
  background-color: var(--color-bg);
}

.methodology-steps {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.methodology-steps .step-item {
  display: flex;
  gap: var(--space-md);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  text-align: left;
}

.step-number {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
}

.step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  width: auto;
  max-width: 100%;
}

.compliance-note {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) var(--space-lg);
}

.compliance-list {
  padding-left: var(--space-md);
}

.compliance-list li {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  position: relative;
  padding-left: var(--space-sm);
  margin-bottom: 6px;
}

.compliance-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.deliverables {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.deliverables-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.deliverable-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.deliverable-card .card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.deliverable-card .card-desc {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.deliverable-card .card-scene {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.method-related {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) var(--space-lg);
}

.related-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.related-link {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.method-visual {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.method-figure img {
  border-radius: var(--radius-lg);
}

/* ============================================================
   4.4 解决方案 hlwcgw/solutions.html
   ============================================================ */

.page-solutions {
  background-color: var(--color-bg);
}

.central-claim {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.claim-panel {
  background-color: var(--color-primary);
  border-left: none;
  border-radius: var(--radius-lg);
}

.claim-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.claim-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: 0;
}

.risk-stages-section,
.signals-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.stages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.stage-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
}

.stage-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.stage-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.stage-task {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.stage-output {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-border);
}

.signal-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.signal-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.signal-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.signal-desc {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.signal-response {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-border);
}

.page-figure {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

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

.cta-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
  text-align: center;
}

.cta-text {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.cta-links {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-link {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.cta-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* ============================================================
   4.5 术语表 hlwcgw/glossary.html
   ============================================================ */

.page-glossary {
  background-color: var(--color-bg);
}

.glossary-group {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.glossary-group h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-primary-light);
}

.term-list {
  padding-left: 0;
}

.term-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.term-item dt {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.term-item dd {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-left: 0;
}

.sidebar-card .index-nav {
  display: flex;
  flex-direction: column;
}

/* ============================================================
   4.6 常见问题 hlwcgw/faq.html
   ============================================================ */

.page-faq {
  background-color: var(--color-bg);
}

.faq-group {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.faq-group h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.faq-list {
  margin-bottom: var(--space-lg);
}

.more-lookup {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.lookup-tip {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.lookup-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.lookup-links a {
  display: inline-block;
  padding: 10px 18px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.lookup-links a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.faq-scene {
  margin-top: var(--space-md);
}

.faq-scene img {
  border-radius: var(--radius-lg);
}

/* ============================================================
   4.7 合作流程 hlwcgw/cooperation.html
   ============================================================ */

.page-cooperation {
  background-color: var(--color-bg);
}

.layout-shell {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.cooperation-steps-section,
.communication-principle-section {
  margin-bottom: var(--space-xl);
}

.content-media-inline {
  margin-bottom: var(--space-md);
}

.content-media-inline img {
  border-radius: var(--radius-lg);
}

.cooperation-steps-list {
  counter-reset: step-counter;
  padding-left: 0;
}

.cooperation-step-item {
  counter-increment: step-counter;
  position: relative;
  padding: var(--space-md) 0 var(--space-md) 56px;
  border-bottom: 1px solid var(--color-border);
}

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

.cooperation-step-item::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: var(--space-md);
  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: 16px;
  font-weight: 700;
}

.step-body {
  min-width: 0;
}

.step-label {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

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

.step-text {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 4px;
}

.principle-list {
  padding-left: 0;
}

.principle-item {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.principle-name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 2px;
}

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

.preparation-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.sidebar-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.preparation-list {
  padding-left: 0;
}

.preparation-item {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.prep-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.prep-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.related-links {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

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

.related-links-item {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* ============================================================
   4.8 更新动态 hlwcgw/update.html
   ============================================================ */

.page-update {
  background-color: var(--color-bg);
}

.update-hero {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.update-hero-figure img {
  border-radius: var(--radius-lg);
}

.update-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
}

.section-heading {
  margin-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-primary-light);
  padding-bottom: var(--space-sm);
}

.section-heading h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
}

.section-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 4px;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.update-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  gap: var(--space-md);
}

.update-date {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 80px;
}

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

.update-content h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.update-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.update-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.update-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.update-link:hover::after {
  transform: translateX(4px);
}

.history-timeline {
  border-left: 2px solid var(--color-primary-light);
  padding-left: var(--space-lg);
}

.history-period {
  margin-bottom: var(--space-lg);
  position: relative;
}

.history-period::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-lg) - 5px);
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.period-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.period-list li {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding: 4px 0;
  position: relative;
  padding-left: var(--space-sm);
}

.period-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.update-entry-bar {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-md);
  text-align: center;
}

.entry-text {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.entry-link {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.entry-link:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* ============================================================
   4.9 404 页面
   ============================================================ */

.site-error {
  background-color: var(--color-bg);
}

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  flex: 1;
}

.error-section {
  text-align: center;
  max-width: 520px;
}

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

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.error-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

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

/* ============================================================
   5. Responsive — 响应式规则
   ============================================================ */

@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .hero-media {
    order: -1;
  }

  .hero-figure img {
    max-height: 300px;
  }

  .intro-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .steps-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .step-item:nth-child(4),
  .step-item:nth-child(5) {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  /* --- 导航 --- */
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    display: block;
    justify-content: initial;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-sm) var(--space-md);
    gap: 0;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  /* --- 页脚 --- */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  /* --- 首页 --- */
  .hero-banner {
    padding: var(--space-lg) 0;
  }

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

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

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

  .hero-path {
    flex-direction: column;
  }

  .path-step {
    min-width: 0;
  }

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

  .steps-row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

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

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

  .update-inner {
    flex-direction: column;
    text-align: center;
  }

  /* --- 内页 --- */
  .page-layout {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .page-title-area,
  .page-header {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .tier-compare {
    grid-template-columns: 1fr;
  }

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

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

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

  .methodology-steps .step-item {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .step-number {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

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

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

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

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

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

@media (max-width: 480px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .section-block {
    padding: var(--space-lg) 0;
  }

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

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

  .overview-grid,
  .scenario-grid,
  .faq-grid {
    gap: var(--space-sm);
  }

  .service-card,
  .scenario-item {
    padding: var(--space-md);
  }

  .btn-primary,
  .btn-secondary,
  .btn-ghost {
    padding: 10px 18px;
    font-size: 14px;
  }

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

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

  .cooperation-step-item {
    padding-left: 48px;
  }

  .cooperation-step-item::before {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}