/* ==========================================================
   51黑料网 · 整站样式表
   文化场馆风：深蓝主色 / 米白留白 / 金色点缀
   ========================================================== */

/* ==========================================================
   Base — 基础变量、重置、全局排版
   ========================================================== */
:root {
  --color-primary: #1f3a5f;
  --color-primary-light: #2c4d78;
  --color-primary-dark: #162b47;
  --color-bg: #f5f2ec;
  --color-bg-card: #ffffff;
  --color-accent: #c69c6d;
  --color-accent-light: #d8b48a;
  --color-text: #26313c;
  --color-text-secondary: #5b6b7c;
  --color-border: #e3ddd2;
  --color-border-dark: #c9c0b2;
  --color-white: #ffffff;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-base: 0.2s ease;
  --sidebar-width: 240px;
}

*,
*::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: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 34px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

/* ==========================================================
   Layout — 全站布局骨架、容器、栅格
   ========================================================== */

/* 站点骨架 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* 统一内容容器 */
.layout-shell {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 首页三栏容器 */
.home-columns {
  display: grid;
  grid-template-columns: 220px 1fr 260px;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 56px;
}

/* 内页左侧栏 + 主内容布局 */
.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 40px;
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 内页主内容（service / about / guide 使用 .layout-shell.sidebar-left） */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 40px;
  padding-top: 32px;
  padding-bottom: 56px;
}

/* 内页主内容（solution / faq 使用 .page-layout.sidebar-left） */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 40px;
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  padding-top: 32px;
  padding-bottom: 56px;
}

/* 侧栏通用样式 */
.sidebar,
.sidebar-left-aside,
.sidebar-nav {
  min-width: 0;
}

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

/* 首页左右侧栏与中间内容 */
.home-sidebar {
  min-width: 0;
}

/* ==========================================================
   Components — 页头、导航、面包屑、按钮、卡片等
   ========================================================== */

/* ---------- 页头 ---------- */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
}

.utility-bar {
  background-color: var(--color-primary-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.utility-bar-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 6px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  font-size: 13px;
}

.utility-item {
  color: rgba(255, 255, 255, 0.7);
  margin-right: auto;
}

.utility-link {
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  padding: 2px 0;
}

.utility-link:hover {
  color: var(--color-accent-light);
}

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

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
}

.brand-slogan {
  font-size: 12px;
  color: var(--color-accent-light);
  margin-top: 2px;
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 10px 16px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.14);
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  background-color: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

.breadcrumb-sep {
  color: var(--color-border-dark);
  margin: 0 2px;
}

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

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

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

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

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

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

/* ---------- 页内标题 ---------- */
.section-title {
  font-size: 22px;
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.section-desc,
.section-intro {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  font-size: 15px;
}

/* ---------- 页头 ---------- */
.page-header {
  padding: 32px 0 8px;
}

.page-title {
  font-size: 32px;
  margin-bottom: 8px;
}

.page-description {
  color: var(--color-text-secondary);
  font-size: 15px;
  max-width: 720px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  flex-shrink: 0;
  margin-top: auto;
  border-top: 3px solid var(--color-accent);
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-title {
  font-size: 16px;
  color: var(--color-white);
  margin-bottom: 16px;
  font-weight: 600;
}

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

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.footer-link:hover {
  color: var(--color-accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px 24px;
  text-align: center;
}

.copyright,
.footer-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 4px;
}

/* ---------- 首页 hero ---------- */
.hero-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 64px 0;
}

.hero-section .layout-shell {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

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

.hero-subtitle {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  max-width: 520px;
}

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

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

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

.hero-actions .btn-outline {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.hero-actions .btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

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

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  background-color: var(--color-primary-light);
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* ---------- 信息边界声明区 ---------- */
.boundary-section {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0;
}

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

.boundary-desc {
  color: var(--color-text-secondary);
  font-size: 15px;
  max-width: 860px;
  margin-bottom: 20px;
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.boundary-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- 首页侧栏 ---------- */
.sidebar-block {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-primary);
}

.index-list li {
  margin-bottom: 14px;
}

.index-link {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
}

.index-desc {
  display: block;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.faq-preview-list li {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--color-border);
}

.faq-preview-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.faq-preview-link {
  font-size: 14px;
  line-height: 1.5;
  display: inline-block;
}

.faq-preview-link::after {
  content: "→";
  margin-left: 4px;
  color: var(--color-accent);
  font-weight: 600;
}

/* 首页右栏动态列表 */
.update-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 8px;
}

/* ---------- 首页服务概览 ---------- */
.service-overview,
.solution-preview {
  margin-bottom: 40px;
}

.service-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.08);
}

.service-number {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}

.service-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.service-brief {
  font-size: 14px;
  color: var(--color-text-secondary);
  flex-grow: 1;
  margin-bottom: 12px;
}

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

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

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

/* ---------- 首页解决方案预览 ---------- */
.scenario-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  align-items: center;
}

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

.scenario-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg);
}

.scenario-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.scenario-text {
  min-width: 0;
}

.scenario-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.scenario-method {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

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

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

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

/* ---------- 合作流程区 ---------- */
.process-section {
  background-color: var(--color-primary);
  padding: 56px 0;
}

.process-section .section-title {
  color: var(--color-white);
}

.process-section .section-title::before {
  background-color: var(--color-accent);
}

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

.step-item {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}

.step-name {
  color: var(--color-white);
  font-size: 16px;
  margin-bottom: 8px;
}

.step-desc {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 0;
}

/* ---------- 服务承诺区 ---------- */
.commitment-section {
  padding: 56px 0;
}

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

.commitment-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 24px;
}

.commitment-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.commitment-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ---------- 下一步引导区 ---------- */
.next-step-section {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 56px 0;
}

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

.next-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.next-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.08);
}

.next-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.next-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.next-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ---------- 内页内容区块 ---------- */
.content-section {
  margin-bottom: 40px;
}

.content-section .section-title {
  margin-bottom: 16px;
}

.summary-section {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.summary-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 问题列表 */
.problem-list {
  counter-reset: problem-counter;
}

.problem-list li {
  counter-increment: problem-counter;
  position: relative;
  padding: 10px 0 10px 40px;
  font-size: 15px;
  border-bottom: 1px dashed var(--color-border);
}

.problem-list li::before {
  content: counter(problem-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

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

/* ---------- Service 页 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.service-grid .service-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.service-grid .service-name {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.service-grid .service-number {
  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: 13px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.service-detail p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  line-height: 1.6;
}

.service-scene::before {
  content: "适用场景：";
  font-weight: 600;
  color: var(--color-primary);
}

.service-method::before {
  content: "工作方式：";
  font-weight: 600;
  color: var(--color-primary);
}

.service-output::before {
  content: "交付形式：";
  font-weight: 600;
  color: var(--color-primary);
}

.media-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg);
  margin-bottom: 8px;
}

.figure-image {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.figure-caption {
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
  padding: 8px 0;
}

.update-mechanism {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.update-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 相关入口卡片 */
.entry-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.entry-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.entry-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.08);
}

.entry-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.entry-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ---------- Solution 页 ---------- */
.scene-section {
  margin-bottom: 48px;
}

.scene-block {
  margin-bottom: 24px;
}

.scene-subtitle {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.scene-text-with-image {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: start;
}

.scene-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.scene-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg);
}

.scene-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.method-list {
  margin-top: 12px;
}

.method-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-bottom: 1px dashed var(--color-border);
}

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

.method-index {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 24px;
}

.evidence-list {
  margin-top: 12px;
}

.evidence-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.evidence-title {
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
  min-width: 80px;
}

.evidence-desc {
  line-height: 1.6;
}

.comparison-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.comparison-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.comparison-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

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

.related-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.related-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 58, 95, 0.08);
}

.related-card-title {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--color-primary);
}

.related-card-desc,
.related-card-text {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

/* ---------- Guide 页 ---------- */
.prepare-list {
  counter-reset: prepare-counter;
}

.prepare-item {
  counter-increment: prepare-counter;
  position: relative;
  padding: 10px 0 10px 40px;
  font-size: 15px;
  border-bottom: 1px dashed var(--color-border);
}

.prepare-item::before {
  content: counter(prepare-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

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

.process-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
  background-color: var(--color-bg);
}

.process-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.steps-list .step-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
}

.steps-list .step-number {
  width: 48px;
  height: 48px;
  font-size: 18px;
  margin-bottom: 0;
}

.step-head {
  margin-bottom: 8px;
}

.step-title {
  font-size: 17px;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.step-subtitle {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.step-body {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.step-text {
  margin-bottom: 8px;
  line-height: 1.6;
}

.step-detail {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: 8px;
}

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

/* ---------- FAQ 页 ---------- */
.abstract-section {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.abstract-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

.faq-category {
  margin-bottom: 32px;
}

.category-title {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-primary);
}

.faq-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  list-style: none;
  transition: background-color var(--transition-base);
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-question {
  background-color: rgba(31, 58, 95, 0.04);
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

.update-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 16px;
  background-color: var(--color-bg);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

/* ---------- About 页 ---------- */
.problem-list .problem-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
}

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

.problem-index {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 28px;
}

.problem-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.7;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.principle-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 20px;
}

.principle-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.principle-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

.content-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg);
  margin-bottom: 8px;
}

.content-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.boundary-content {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.boundary-content .boundary-desc {
  margin-bottom: 16px;
}

.boundary-content .boundary-list {
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

.boundary-content .boundary-item {
  border-left: 3px solid var(--color-accent);
  padding: 10px 14px;
}

.boundary-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 0;
}

/* 相关入口（about 使用 span 结构） */
.related-cards .related-card-title,
.related-cards .related-card-desc {
  display: block;
}

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

.error-panel {
  text-align: center;
  max-width: 520px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 48px 40px;
}

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

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

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

.btn-back-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.btn-back-home:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
}

/* ---------- 侧栏导航（内页） ---------- */
.sidebar-inner,
.sidebar-nav {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-primary);
}

.sidebar-nav li,
.sidebar-list li,
.anchor-list li {
  margin-bottom: 4px;
}

.sidebar-link,
.sidebar-nav-link,
.anchor-link {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.sidebar-link:hover,
.sidebar-nav-link:hover,
.anchor-link:hover {
  background-color: rgba(31, 58, 95, 0.06);
  color: var(--color-primary);
}

/* FAQ 侧栏入口 */
.sidebar-entry {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.sidebar-entry-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.sidebar-entry-link {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 6px 0;
}

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

/* ---------- 文末相关链接（guide / faq / about） ---------- */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

/* ---------- 滚动进入动画（不影响初始可见性） ---------- */
@media (prefers-reduced-motion: no-preference) {
  .content-section,
  .service-card,
  .step-item,
  .commitment-card,
  .next-card,
  .scenario-block,
  .boundary-item {
    animation: fadeInUp 0.5s ease both;
  }

  .content-section:nth-child(2),
  .service-card:nth-child(2),
  .step-item:nth-child(2),
  .commitment-card:nth-child(2),
  .next-card:nth-child(2) {
    animation-delay: 0.1s;
  }

  .content-section:nth-child(3),
  .service-card:nth-child(3),
  .step-item:nth-child(3),
  .commitment-card:nth-child(3),
  .next-card:nth-child(3) {
    animation-delay: 0.2s;
  }

  .content-section:nth-child(4),
  .service-card:nth-child(4),
  .step-item:nth-child(4),
  .commitment-card:nth-child(4),
  .next-card:nth-child(4) {
    animation-delay: 0.3s;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================
   Pages — 页面级微调（仅业务模块，不覆盖骨架）
   ========================================================== */

/* 首页 hero 使用 layout-shell 容器 */
.hero-section .layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

/* 平板：≤1024px */
@media (max-width: 1024px) {
  .home-columns {
    grid-template-columns: 200px 1fr;
  }

  .right-sidebar {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 24px;
  }

  .right-sidebar .sidebar-block {
    margin-bottom: 0;
  }

  .sidebar-left,
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    grid-template-columns: 200px 1fr;
    gap: 24px;
  }

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

  .service-grid,
  .comparison-list {
    grid-template-columns: 1fr;
  }
}

/* 手机：≤768px */
@media (max-width: 768px) {
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 20px;
  }

  .utility-bar-inner {
    padding: 6px 16px;
    gap: 12px;
  }

  .utility-item {
    display: none;
  }

  .header-main {
    padding: 0 16px;
    height: 64px;
  }

  .brand-name {
    font-size: 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    z-index: 100;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    gap: 0;
  }

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

  .nav-link {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-link.is-current::after {
    display: none;
  }

  .header-main {
    position: relative;
  }

  /* 首页三栏 → 单列 */
  .home-columns {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 32px;
  }

  .right-sidebar {
    grid-column: auto;
    display: block;
  }

  .right-sidebar .sidebar-block {
    margin-bottom: 24px;
  }

  /* 内页侧栏布局 → 单列，主内容优先 */
  .sidebar-left,
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 24px;
  }

  .sidebar,
  .sidebar-left-aside,
  .sidebar-nav {
    order: 2;
    margin-top: 32px;
  }

  .main-content,
  .home-main-content {
    order: 1;
  }

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

  .hero-section .layout-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-figure img {
    height: 220px;
  }

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

  .hero-actions .btn {
    justify-content: center;
  }

  /* 边界声明 */
  .boundary-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  /* 服务卡片 */
  .service-card-grid {
    grid-template-columns: 1fr;
  }

  /* 场景块 */
  .scenario-block {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .scenario-figure img {
    height: 160px;
  }

  /* 流程与承诺 */
  .process-section {
    padding: 40px 0;
  }

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

  .next-step-grid {
    grid-template-columns: 1fr;
  }

  .commitment-section,
  .next-step-section {
    padding: 40px 0;
  }

  /* 内页 */
  .breadcrumb {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-header {
    padding-top: 24px;
  }

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

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

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

  .figure-image {
    height: 180px;
  }

  .entry-cards,
  .related-cards,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .scene-text-with-image {
    grid-template-columns: 1fr;
  }

  .scene-figure img {
    height: 160px;
  }

  .steps-list .step-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .steps-list .step-number {
    margin-bottom: 0;
  }

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

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

  .content-figure img {
    height: 180px;
  }

  .process-image {
    height: 160px;
  }

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

  .footer-bottom {
    padding: 12px 16px;
  }

  .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .error-panel {
    padding: 32px 24px;
  }

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

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

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

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

  .boundary-item {
    font-size: 13px;
  }

  .service-card {
    padding: 18px;
  }

  .scenario-block {
    padding: 14px;
  }

  .step-item {
    padding: 18px;
  }

  .commitment-card {
    padding: 18px;
  }

  .next-card {
    padding: 20px 18px;
  }

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

  .faq-answer {
    padding: 12px 16px 14px;
    font-size: 13px;
  }
}