/* ===== 官网主题：深藏青 + 琥珀橙 ===== */
:root {
  --c-bg: #f0f2f7;
  --c-surface: #ffffff;
  --c-surface-alt: #e8ecf4;
  --c-primary: #1a2744;
  --c-primary-light: #2d3f66;
  --c-accent: #c45c26;
  --c-accent-hover: #a84a1c;
  --c-text: #2b3447;
  --c-text-muted: #5c6678;
  --c-border: #d4dae6;
  --c-shadow: 0 4px 20px rgba(26, 39, 68, 0.08);
  --c-radius: 10px;
  --c-radius-lg: 14px;
  --c-container: 1140px;
  --c-gap: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--c-accent);
  transition: color 0.2s;
}

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

.z6439ccontainer {
  width: 92%;
  max-width: var(--c-container);
  margin-left: auto;
  margin-right: auto;
}

/* ===== 导航 ===== */
.z6439cnavbar {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 1px 0 rgba(26, 39, 68, 0.04);
}

.z6439cnav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  position: relative;
  min-height: 60px;
}

.z6439cbrand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
  max-width: 55%;
}

.z6439cbrand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  flex-shrink: 0;
}

.z6439cbrand-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.3;
}

.z6439cnav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.z6439cnav-links a {
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 0.25rem 0;
}

.z6439cnav-links a:hover {
  color: var(--c-accent);
}

.z6439cnav-links a.z6439cthis,
.z6439cnav-links a.thisclass {
  color: var(--c-accent);
  font-weight: 600;
}

.z6439cnav-toggle {
  display: none;
  background: var(--c-surface-alt);
  border: 1px solid var(--c-border);
  color: var(--c-primary);
  font-size: 1.35rem;
  cursor: pointer;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  line-height: 1;
  flex-shrink: 0;
}

/* ===== 首页 Hero ===== */
.z6439chero {
  background: linear-gradient(160deg, var(--c-primary) 0%, #243a5e 55%, #3d2a4a 100%);
  color: #fff;
  padding: 3rem 0 3.5rem;
}

.z6439chero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}

.z6439chero-label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.12);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  color: rgba(255, 255, 255, 0.9);
}

.z6439chero-text h1 {
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1rem;
  color: #fff;
}

.z6439chero-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 0.75rem;
}

.z6439chero-sub {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 1.5rem;
}

.z6439chero-sub strong {
  color: #f5d0b8;
  font-weight: 600;
}

.z6439chero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.z6439chero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.z6439chero-img {
  width: 100%;
  max-width: 360px;
  border-radius: var(--c-radius-lg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  border: 3px solid rgba(255, 255, 255, 0.15);
}

/* ===== 按钮 ===== */
.z6439cbtn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.z6439cbtn-primary {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
}

.z6439cbtn-primary:hover {
  background: var(--c-accent-hover);
  border-color: var(--c-accent-hover);
  color: #fff;
}

.z6439cbtn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.z6439cbtn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

/* ===== 数据条 ===== */
.z6439cstats {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  margin-top: -1.5rem;
  position: relative;
  z-index: 2;
  padding: 0 0 0.5rem;
}

.z6439cstats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--c-gap);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg);
  box-shadow: var(--c-shadow);
  padding: 1.25rem 1.5rem;
}

.z6439cstat-item {
  text-align: center;
  padding: 0.5rem 0.25rem;
  border-right: 1px solid var(--c-border);
}

.z6439cstat-item:last-child {
  border-right: none;
}

.z6439cstat-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--c-accent);
  line-height: 1.2;
  margin-bottom: 0.2rem;
}

.z6439cstat-item span {
  font-size: 0.82rem;
  color: var(--c-text-muted);
}

/* ===== 通用板块 ===== */
.z6439cmain {
  padding-bottom: 2rem;
}

.z6439cblock {
  padding: 3rem 0;
}

.z6439cblock-alt {
  background: var(--c-surface-alt);
}

.z6439cblock-contact {
  background: var(--c-primary);
  color: rgba(255, 255, 255, 0.9);
}

.z6439cblock-contact .z6439cblock-head h2,
.z6439cblock-contact .z6439cblock-head p {
  color: #fff;
}

.z6439cblock-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2rem;
}

.z6439cblock-head-left {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.z6439cblock-head h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  color: var(--c-primary);
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.z6439cblock-head p {
  color: var(--c-text-muted);
  font-size: 0.95rem;
}

.z6439cblock-contact .z6439cblock-head p {
  color: rgba(255, 255, 255, 0.8);
}

/* ===== 卡片网格 ===== */
.z6439ccard-grid {
  display: grid;
  gap: var(--c-gap);
}

.z6439ccard-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.z6439ccard {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 1.25rem;
  box-shadow: var(--c-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  min-width: 0;
}

.z6439ccard:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(26, 39, 68, 0.12);
}

.z6439ccard-icon {
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: var(--c-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 8px;
  margin-bottom: 0.85rem;
}

.z6439ccard h3 {
  font-size: 1rem;
  color: var(--c-primary);
  margin-bottom: 0.5rem;
}

.z6439ccard p {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  line-height: 1.55;
}

/* ===== 行业知识 ===== */
.z6439cknowledge-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--c-gap);
  align-items: start;
}

.z6439cknowledge-main {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--c-shadow);
  min-width: 0;
}

.z6439cknowledge-main h3 {
  font-size: 1.05rem;
  color: var(--c-primary);
  margin: 1.25rem 0 0.6rem;
}

.z6439cknowledge-main h3:first-child {
  margin-top: 0;
}

.z6439cknowledge-main p {
  font-size: 0.92rem;
  color: var(--c-text-muted);
  margin-bottom: 0.75rem;
}

.z6439cnotice {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--c-radius);
  padding: 1.15rem;
  box-shadow: var(--c-shadow);
}

.z6439cnotice h4 {
  font-size: 0.95rem;
  color: var(--c-primary);
  margin-bottom: 0.6rem;
}

.z6439cnotice ul {
  list-style: none;
  font-size: 0.88rem;
  color: var(--c-text-muted);
}

.z6439cnotice li {
  padding: 0.35rem 0;
  padding-left: 1rem;
  position: relative;
}

.z6439cnotice li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  background: var(--c-accent);
  border-radius: 50%;
}

/* ===== FAQ ===== */
.z6439cfaq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--c-gap);
}

.z6439cfaq {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 0;
  overflow: hidden;
  min-width: 0;
}

.z6439cfaq summary {
  padding: 1rem 1.15rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--c-primary);
  cursor: pointer;
  list-style: none;
}

.z6439cfaq summary::-webkit-details-marker {
  display: none;
}

.z6439cfaq[open] summary {
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface-alt);
}

.z6439cfaq p {
  padding: 0.85rem 1.15rem 1rem;
  font-size: 0.88rem;
  color: var(--c-text-muted);
}

/* ===== 首页文章 ===== */
.z6439chome-article-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--c-gap);
}

.z6439chome-article-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  overflow: hidden;
  box-shadow: var(--c-shadow);
  min-width: 0;
  transition: box-shadow 0.2s;
}

.z6439chome-article-card:hover {
  box-shadow: 0 8px 24px rgba(26, 39, 68, 0.1);
}

.z6439chome-article-thumb {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--c-surface-alt);
}

.z6439chome-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z6439chome-article-title {
  padding: 0.65rem 0.7rem 0.75rem;
  font-size: 0.85rem;
  line-height: 1.4;
  min-width: 0;
}

.z6439chome-article-title a {
  color: var(--c-text);
  text-decoration: none;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.z6439chome-article-title a:hover {
  color: var(--c-accent);
}

.z6439chome-article-card p {
  display: none;
}

/* ===== 关于 ===== */
.z6439cabout-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--c-gap);
  align-items: start;
}

.z6439ccheck-list {
  list-style: none;
  margin-top: 1rem;
}

.z6439ccheck-list li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  position: relative;
  font-size: 0.92rem;
  color: var(--c-text-muted);
}

.z6439ccheck-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-weight: bold;
}

.z6439cflow-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg);
  padding: 1.35rem;
  box-shadow: var(--c-shadow);
}

.z6439cflow-card h3 {
  font-size: 1rem;
  color: var(--c-primary);
  margin-bottom: 0.85rem;
}

.z6439cflow-card ol {
  padding-left: 1.2rem;
  font-size: 0.9rem;
  color: var(--c-text-muted);
}

.z6439cflow-card li {
  margin-bottom: 0.45rem;
}

/* ===== 联系 ===== */
.z6439ccontact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--c-gap);
  align-items: start;
}

.z6439ccontact-form {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--c-radius-lg);
  padding: 1.35rem;
  min-width: 0;
}

.z6439cform-group {
  margin-bottom: 1rem;
}

.z6439cform-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.9);
}

.z6439cform-group input,
.z6439cform-group textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--c-text);
  font-size: 0.92rem;
  font-family: inherit;
}

.z6439cform-group input:focus,
.z6439cform-group textarea:focus {
  outline: 2px solid var(--c-accent);
  outline-offset: 1px;
}

.z6439ccontact-aside {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  min-width: 0;
}

.z6439ccontact-note {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  font-size: 0.85rem;
}

/* ===== 页脚 ===== */
.z6439cfooter {
  background: var(--c-primary);
  color: rgba(255, 255, 255, 0.75);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.88rem;
}

.z6439cfooter a {
  color: #f0c4a8;
}

.z6439cfooter-copy {
  margin-bottom: 0.75rem;
}

.z6439csite-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.z6439ctag {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem 1rem;
  list-style: none;
  margin: 0.75rem 0;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

.footer-links a:hover {
  color: #fff;
}

.z6439cflink {
  margin: 1rem 0;
}

.flink_title {
  color: #f0c4a8;
  margin-bottom: 0.5rem;
}

.flink_list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  list-style: none;
}

.flink_list a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

/* ===== 内页横幅 ===== */
.z6439cpage-banner {
  background: var(--c-primary);
  color: #fff;
  padding: 2rem 0;
  text-align: center;
}

.z6439cpage-banner h1 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  padding: 0 0.5rem;
  word-break: break-word;
}

.z6439cbreadcrumb {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.75);
}

.z6439cbreadcrumb a {
  color: #f0c4a8;
  text-decoration: none;
}

/* ===== 主栏 + 侧栏 ===== */
.z6439clayout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--c-gap);
  align-items: start;
  padding: 2rem 0 2.5rem;
  width: 92%;
  max-width: var(--c-container);
  margin: 0 auto;
}

.z6439cmain-col {
  min-width: 0;
}

.z6439csection {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg);
  padding: 1.35rem;
  box-shadow: var(--c-shadow);
  margin-bottom: var(--c-gap);
  min-width: 0;
  overflow: hidden;
}

.z6439csection h2 {
  font-size: 1.15rem;
  color: var(--c-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--c-border);
}

/* ===== 侧栏 ===== */
.z6439csidebar {
  min-width: 0;
  position: sticky;
  top: 76px;
}

.z6439csidebar-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg);
  padding: 0.85rem;
  box-shadow: var(--c-shadow);
  overflow: hidden;
}

.z6439csidebar-list {
  list-style: none;
  max-height: 70vh;
  overflow-y: auto;
}

.z6439csidebar-item {
  border-bottom: 1px solid var(--c-border);
  padding: 0.55rem 0;
}

.z6439csidebar-item:last-child {
  border-bottom: none;
}

.z6439csidebar-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--c-text);
  min-width: 0;
}

.z6439csidebar-link:hover {
  color: var(--c-accent);
}

.z6439csidebar-thumb {
  flex: 0 0 64px;
  width: 64px;
  height: 48px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--c-surface-alt);
}

.z6439csidebar-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z6439csidebar-text {
  flex: 1;
  font-size: 0.82rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-width: 0;
}

/* ===== 列表页 ===== */
.z6439clist-articles {
  list-style: none;
}

.z6439clist-item {
  display: flex;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--c-border);
  min-width: 0;
}

.z6439clist-item:last-child {
  border-bottom: none;
}

.z6439clist-thumb {
  flex: 0 0 180px;
  width: 180px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--c-surface-alt);
}

.z6439clist-thumb img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.z6439clist-body {
  flex: 1;
  min-width: 0;
}

.z6439clist-title {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.z6439clist-title a {
  color: var(--c-primary);
  text-decoration: none;
}

.z6439clist-title a:hover {
  color: var(--c-accent);
}

.z6439clist-meta {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-bottom: 0.4rem;
}

.z6439clist-meta span {
  margin-right: 0.75rem;
}

.z6439clist-intro {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  line-height: 1.55;
  margin-bottom: 0.35rem;
  word-break: break-word;
}

.z6439clist-more {
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

/* ===== 分页 ===== */
.z6439cpagebar {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--c-border);
}

.z6439cpagelist-bar,
.z6439cpages .pagelist {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  list-style: none;
}

.z6439cpagelist-bar a,
.z6439cpagelist-bar span,
.z6439cpages .pagelist a,
.z6439cpages .pagelist span {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: var(--c-surface-alt);
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.85rem;
}

.z6439cpagelist-bar a:hover,
.z6439cpages .pagelist a:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

/* ===== 内容页 ===== */
.z6439carticle-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--c-border);
}

.z6439carticle-meta-bar a {
  color: var(--c-accent);
}

.z6439carticle-cover {
  text-align: center;
  margin-bottom: 1.25rem;
}

.z6439carticle-cover img {
  max-width: 100%;
  border-radius: var(--c-radius);
  border: 1px solid var(--c-border);
}

.z6439carticle-cover img[src=""],
.z6439carticle-cover:empty {
  display: none;
}

.z6439carticle-body {
  font-size: 1rem;
  color: var(--c-text);
  line-height: 1.75;
  word-break: break-word;
  overflow-wrap: break-word;
}

.z6439carticle-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.z6439cmulti-img {
  margin: 1rem 0;
  text-align: center;
}

.z6439cmulti-img img {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--c-border);
}

.z6439cmulti-img figcaption {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin-top: 0.35rem;
}

.z6439cmeta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 1rem 0;
}

.z6439ctagitem a {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: var(--c-surface-alt);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  text-decoration: none;
}

.z6439ctagitem a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.z6439cprenext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--c-gap);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--c-border);
  font-size: 0.88rem;
}

.z6439cprenext-item {
  min-width: 0;
  word-break: break-word;
}

.z6439cprenext-item a {
  color: var(--c-accent);
}

.z6439crelated-list {
  list-style: none;
}

.z6439crelated-item {
  display: flex;
  gap: 0.85rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--c-border);
  min-width: 0;
}

.z6439crelated-item:last-child {
  border-bottom: none;
}

.z6439crelated-thumb {
  flex: 0 0 100px;
}

.z6439crelated-thumb img {
  width: 100px;
  height: 68px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--c-border);
}

.z6439crelated-body {
  flex: 1;
  min-width: 0;
}

.z6439crelated-body h3 {
  font-size: 0.92rem;
  margin-bottom: 0.25rem;
}

.z6439crelated-body h3 a {
  color: var(--c-primary);
  text-decoration: none;
}

.z6439crelated-body p {
  font-size: 0.82rem;
  color: var(--c-text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .z6439ccard-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .z6439chome-article-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .z6439cknowledge-layout {
    grid-template-columns: 1fr;
  }
  .z6439clayout {
    grid-template-columns: 1fr 260px;
  }
}

@media (max-width: 900px) {
  .z6439chero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .z6439chero-actions {
    justify-content: center;
  }
  .z6439chero-visual {
    order: -1;
  }
  .z6439cstats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .z6439cstat-item:nth-child(2) {
    border-right: none;
  }
  .z6439cstat-item {
    border-right: 1px solid var(--c-border);
  }
  .z6439cstat-item:nth-child(odd) {
    border-right: 1px solid var(--c-border);
  }
  .z6439cstat-item:nth-child(even) {
    border-right: none;
  }
  .z6439cfaq-grid {
    grid-template-columns: 1fr;
  }
  .z6439cabout-grid {
    grid-template-columns: 1fr;
  }
  .z6439ccontact-grid {
    grid-template-columns: 1fr;
  }
  .z6439clayout {
    grid-template-columns: 1fr;
    width: 94%;
  }
  .z6439csidebar {
    position: static;
  }
  .z6439cnav-toggle {
    display: block;
  }
  .z6439cnav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-top: none;
    box-shadow: var(--c-shadow);
    padding: 0.75rem 1rem 1rem;
    gap: 0;
    max-height: 70vh;
    overflow-y: auto;
  }
  .z6439cnav-links.open {
    display: flex;
  }
  .z6439cnav-links a {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--c-border);
    white-space: normal;
  }
  .z6439cnav-links a:last-child {
    border-bottom: none;
  }
  .z6439cbrand {
    max-width: calc(100% - 50px);
  }
  .z6439clist-item {
    flex-direction: column;
  }
  .z6439clist-thumb {
    flex: none;
    width: 100%;
  }
  .z6439cprenext {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .z6439cblock {
    padding: 2rem 0;
  }
  .z6439ccard-grid-4 {
    grid-template-columns: 1fr;
  }
  .z6439chome-article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .z6439cstats-grid {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  .z6439cstat-item {
    border-right: none !important;
    border-bottom: 1px solid var(--c-border);
    padding: 0.65rem 0;
  }
  .z6439cstat-item:last-child {
    border-bottom: none;
  }
  .z6439cbrand-text {
    font-size: 0.88rem;
  }
  .z6439csection {
    padding: 1rem;
  }
  .z6439crelated-item {
    flex-direction: column;
  }
  .z6439crelated-thumb img {
    width: 100%;
    height: auto;
    max-height: 140px;
  }
}

@media (max-width: 400px) {
  .z6439chome-article-grid {
    grid-template-columns: 1fr;
  }
}