/* 官网风格 · 青墨+琥珀配色 · 前缀 z83131 */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --c-bg: #eef1f5;
  --c-surface: #ffffff;
  --c-text: #1a2b3c;
  --c-muted: #5a6b7d;
  --c-primary: #0d5c57;
  --c-primary-dark: #083d3a;
  --c-accent: #c8920a;
  --c-accent-light: #f5e6c8;
  --c-dark: #0c1a2e;
  --c-border: #d8dee6;
  --c-radius: 10px;
  --c-shadow: 0 4px 20px rgba(12, 26, 46, 0.06);
  --c-max: 1160px;
  --c-gap: 24px;
}

html { scroll-behavior: smooth; }

body.z83131body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; vertical-align: middle; }

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

.z83131site { min-height: 100vh; display: flex; flex-direction: column; }
.z83131container { width: 100%; max-width: var(--c-max); margin: 0 auto; padding: 0 20px; }

/* ========== 顶栏导航 ========== */
.z83131header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--c-shadow);
}

.z83131header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.z83131logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-dark);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}
.z83131logo:hover { color: var(--c-primary); }

.z83131nav-toggle { display: none; }

.z83131nav-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  background: var(--c-surface);
  flex-shrink: 0;
}
.z83131nav-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-dark);
  border-radius: 1px;
  transition: 0.25s;
}

.z83131nav-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
}

.z83131nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.9rem;
  color: var(--c-muted);
  text-decoration: none;
  border-radius: 6px;
  white-space: nowrap;
}
.z83131nav-link:hover,
.z83131nav-link.z83131active {
  color: var(--c-primary);
  background: rgba(13, 92, 87, 0.08);
}
.z83131nav-cta {
  background: var(--c-primary);
  color: #fff !important;
  font-weight: 600;
}
.z83131nav-cta:hover {
  background: var(--c-primary-dark);
  color: #fff !important;
}

.z83131nav-overlay,
.z83131nav-close { display: none; }

/* ========== 首页 Hero ========== */
.z83131hero {
  background: linear-gradient(135deg, var(--c-dark) 0%, #143352 55%, var(--c-primary-dark) 100%);
  color: #fff;
  padding: 56px 0 48px;
}

.z83131hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.z83131hero-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  font-size: 0.8rem;
  background: rgba(200, 146, 10, 0.25);
  border: 1px solid rgba(200, 146, 10, 0.5);
  border-radius: 20px;
  color: var(--c-accent-light);
}

.z83131hero-title {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  line-height: 1.35;
}

.z83131hero-desc {
  margin: 0 0 12px;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
}

.z83131hero-lead {
  margin: 0 0 24px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
}
.z83131hero-lead strong { color: #fff; font-weight: 600; }

.z83131hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.z83131hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.z83131hero-img {
  max-height: 280px;
  width: auto;
  border-radius: var(--c-radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

/* 数据条 */
.z83131stats {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  margin-top: -1px;
}

.z83131stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--c-border);
}

.z83131stat {
  background: var(--c-surface);
  padding: 20px 16px;
  text-align: center;
}
.z83131stat strong {
  display: block;
  font-size: 1.35rem;
  color: var(--c-primary);
  margin-bottom: 4px;
}
.z83131stat span { font-size: 0.85rem; color: var(--c-muted); }

/* ========== 通用板块 ========== */
.z83131main { flex: 1; }

.z83131block {
  padding: 56px 0;
  border-bottom: 1px solid var(--c-border);
}
.z83131block-alt { background: var(--c-surface); }
.z83131block-contact {
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-accent-light) 100%);
}

.z83131block-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 36px;
}
.z83131block-head-left { text-align: left; margin-left: 0; margin-right: 0; max-width: none; }

.z83131block-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 8px;
  font-weight: 600;
}

.z83131block-title {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--c-dark);
}

.z83131block-sub {
  margin: 0;
  font-size: 0.95rem;
  color: var(--c-muted);
  line-height: 1.7;
}

/* 服务卡片 */
.z83131svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--c-gap);
}

.z83131svc-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 24px 20px;
  box-shadow: var(--c-shadow);
  transition: border-color 0.2s, transform 0.2s;
}
.z83131svc-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-3px);
}
.z83131svc-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 10px;
}
.z83131svc-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--c-dark);
  line-height: 1.4;
}
.z83131svc-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.65;
}

/* 指南 */
.z83131guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--c-gap);
}

.z83131guide-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 22px 20px;
  border-left: 4px solid var(--c-primary);
}
.z83131guide-card h3 {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--c-dark);
  line-height: 1.45;
}
.z83131guide-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.7;
}

/* 案例行 */
.z83131case-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--c-gap);
}

.z83131case-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 22px 18px;
  text-align: center;
}
.z83131case-item h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--c-primary);
}
.z83131case-item p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--c-muted);
  line-height: 1.6;
}

/* 简介 */
.z83131about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}
.z83131about-main p {
  margin: 0 0 14px;
  font-size: 0.95rem;
  color: var(--c-muted);
  line-height: 1.75;
}
.z83131about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.z83131about-list li {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 16px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--c-muted);
}
.z83131about-list strong {
  display: block;
  font-size: 1.25rem;
  color: var(--c-primary);
  margin-bottom: 4px;
}

/* 流程 */
.z83131flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--c-gap);
  counter-reset: flow;
}
.z83131flow li {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 20px 16px;
  position: relative;
}
.z83131flow li span {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.z83131flow h3 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  color: var(--c-dark);
}
.z83131flow p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.55;
}

/* FAQ */
.z83131faq { max-width: 800px; margin: 0 auto; }

.z83131faq-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  margin-bottom: 10px;
  overflow: hidden;
}
.z83131faq-item summary {
  padding: 14px 18px;
  font-weight: 600;
  color: var(--c-dark);
  cursor: pointer;
  list-style: none;
}
.z83131faq-item summary::-webkit-details-marker { display: none; }
.z83131faq-item[open] summary { color: var(--c-primary); border-bottom: 1px solid var(--c-border); }
.z83131faq-item p {
  margin: 0;
  padding: 14px 18px 16px;
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.7;
}

/* 首页文章 */
.z83131home-articles {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.z83131home-article-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s;
}
.z83131home-article-card:hover { box-shadow: var(--c-shadow); border-color: var(--c-primary); }

.z83131home-article-thumb {
  display: block;
  height: 110px;
  overflow: hidden;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
}
.z83131home-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z83131home-article-title {
  margin: 10px 12px 6px;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.4;
}
.z83131home-article-title a {
  color: var(--c-dark);
  text-decoration: none;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.z83131home-article-date {
  display: block;
  margin: 0 12px 12px;
  font-size: 0.75rem;
  color: var(--c-muted);
}

/* 安全 */
.z83131sec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--c-gap);
}
.z83131sec-item {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 20px 16px;
  text-align: center;
}
.z83131sec-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--c-primary);
}
.z83131sec-item p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.55;
}

/* 评价 */
.z83131review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--c-gap);
}
.z83131review {
  margin: 0;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 22px 18px;
  border-top: 3px solid var(--c-accent);
}
.z83131review p {
  margin: 0 0 12px;
  font-size: 0.92rem;
  color: var(--c-muted);
  line-height: 1.65;
  font-style: italic;
}
.z83131review cite {
  font-size: 0.82rem;
  color: var(--c-primary);
  font-style: normal;
}

/* 联系表单 */
.z83131contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.z83131contact-info .z83131block-title { text-align: left; }
.z83131contact-info p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--c-muted);
  line-height: 1.7;
}

.z83131form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 24px;
}

.z83131btn {
  display: inline-block;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: background 0.2s, color 0.2s;
}
.z83131btn-primary {
  background: var(--c-primary);
  color: #fff;
}
.z83131btn-primary:hover { background: var(--c-primary-dark); color: #fff; }
.z83131btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}
.z83131btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.z83131input,
.z83131textarea {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.95rem;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  background: #fff;
  color: var(--c-text);
  font-family: inherit;
}
.z83131input:focus,
.z83131textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(13, 92, 87, 0.12);
}
.z83131textarea { min-height: 100px; resize: vertical; }

/* 页脚 */
.z83131footer {
  background: var(--c-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 28px 0;
  margin-top: auto;
  font-size: 0.88rem;
  text-align: center;
}
.z83131footer a { color: var(--c-accent-light); }
.z83131footer p { margin: 6px 0; }
.z83131footer-copy { margin-bottom: 8px; }

.z83131flink { margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(255, 255, 255, 0.12); }
.flink_title { color: var(--c-accent-light); margin-bottom: 8px; }
.flink_list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
}
.flink_list a { color: rgba(255, 255, 255, 0.65); font-size: 0.85rem; }

/* ========== 内页 / 列表 ========== */
.z83131page-inner .z83131main { padding: 0; }

.z83131breadcrumb {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 0;
  font-size: 0.88rem;
  color: var(--c-muted);
}
.z83131breadcrumb a { color: var(--c-primary); text-decoration: none; }

.z83131content-layout {
  display: flex;
  gap: var(--c-gap);
  padding: 28px 20px 48px;
  max-width: calc(var(--c-max) + 40px);
  margin: 0 auto;
  align-items: flex-start;
}

.z83131list-main,
.z83131article-main {
  flex: 1;
  min-width: 0;
}

.z83131panel {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 28px 24px;
  margin-bottom: var(--c-gap);
  box-shadow: var(--c-shadow);
}

.z83131panel-title,
.z83131section-title {
  margin: 0 0 24px;
  font-size: 1.4rem;
  color: var(--c-dark);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-primary);
}

/* 侧栏 */
.z83131content-sidebar {
  width: 260px;
  flex-shrink: 0;
}

.z83131sidebar-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius);
  padding: 18px 16px;
  box-shadow: var(--c-shadow);
}

.z83131sidebar-block-title {
  margin: 0 0 14px;
  font-size: 1rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-dark);
}

.z83131sidebar-article-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 520px;
  overflow-y: auto;
}

.z83131sidebar-article-item {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
}
.z83131sidebar-article-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.z83131sidebar-article-link {
  display: flex;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text);
}
.z83131sidebar-article-link:hover { color: var(--c-primary); }

.z83131sidebar-article-thumb {
  flex-shrink: 0;
  width: 68px;
  height: 52px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
}
.z83131sidebar-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z83131sidebar-article-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.z83131sidebar-article-title {
  font-size: 0.82rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.z83131sidebar-article-date {
  font-size: 0.72rem;
  color: var(--c-muted);
}

/* 列表项 */
.z83131list-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.z83131list-item {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-border);
  align-items: flex-start;
}
.z83131list-item:last-child { border-bottom: none; }

.z83131list-thumb {
  flex-shrink: 0;
  width: 180px;
  height: 120px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--c-border);
  display: block;
  background: var(--c-bg);
}
.z83131list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z83131list-body { flex: 1; min-width: 0; }

.z83131list-title {
  margin: 0 0 8px;
  font-size: 1.1rem;
  line-height: 1.4;
}
.z83131list-title a {
  color: var(--c-dark);
  text-decoration: none;
}
.z83131list-title a:hover { color: var(--c-primary); }

.z83131list-meta {
  font-size: 0.82rem;
  color: var(--c-muted);
  margin-bottom: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.z83131list-intro {
  margin: 0;
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.6;
}

/* 分页 */
.z83131pagebar {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}

.z83131pagelist-lr,
.z83131pages .pagelist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
}

.z83131pagelist-lr li { flex-shrink: 0; }

.z83131pagelist-lr li a,
.z83131pagelist-lr li span,
.z83131pagelist-lr li strong {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: var(--c-surface);
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.88rem;
  white-space: nowrap;
}
.z83131pagelist-lr li a:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.z83131pagelist-lr .pageinfo,
.z83131pagelist-lr li.pageinfo {
  width: 100%;
  flex: 0 0 100%;
  text-align: center;
  border: none;
  background: transparent;
  color: var(--c-muted);
  margin-bottom: 4px;
}

.z83131pagelist-lr .pagenext,
.z83131pagelist-lr li.pagenext { margin-left: auto; }

/* 内容页 */
.z83131article-title {
  margin: 0 0 16px;
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  line-height: 1.4;
  color: var(--c-dark);
}

.z83131article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--c-muted);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-border);
}

.z83131article-litpic {
  margin-bottom: 20px;
  text-align: center;
}
.z83131article-litpic img {
  max-width: 100%;
  border-radius: var(--c-radius);
  border: 1px solid var(--c-border);
}

.z83131article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
  word-break: break-word;
}
.z83131article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.z83131article-figure {
  margin: 16px 0;
  text-align: center;
}
.z83131article-figure img {
  border: 1px solid var(--c-border);
  border-radius: 8px;
}
.z83131article-figure figcaption {
  font-size: 0.85rem;
  color: var(--c-muted);
  margin-top: 8px;
}

.z83131meta-tags {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.z83131tagitem a {
  display: inline-block;
  padding: 4px 12px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  font-size: 0.82rem;
  color: var(--c-primary);
  text-decoration: none;
}
.z83131clear { display: none; }

.z83131article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.z83131article-nav-item { flex: 1; min-width: 200px; color: var(--c-muted); }
.z83131article-nav-pre { text-align: left; }
.z83131article-nav-next { text-align: right; }
.z83131article-nav a { color: var(--c-primary); }

.z83131related-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.z83131related-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}
.z83131related-item:last-child { border-bottom: none; }

.z83131related-thumb {
  flex-shrink: 0;
  width: 110px;
  height: 78px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--c-border);
  display: block;
}
.z83131related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.z83131related-title {
  font-weight: 600;
  color: var(--c-dark);
  text-decoration: none;
  font-size: 0.95rem;
}
.z83131related-desc {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.5;
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
  .z83131svc-grid { grid-template-columns: repeat(2, 1fr); }
  .z83131home-articles { grid-template-columns: repeat(4, 1fr); }
  .z83131sec-grid { grid-template-columns: repeat(2, 1fr); }
  .z83131flow { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .z83131hero-grid { grid-template-columns: 1fr; text-align: center; }
  .z83131hero-actions { justify-content: center; }
  .z83131hero-visual { order: -1; }
  .z83131hero-img { max-height: 200px; }
  .z83131stats-grid { grid-template-columns: repeat(2, 1fr); }
  .z83131guide-grid,
  .z83131case-row,
  .z83131review-grid { grid-template-columns: 1fr; }
  .z83131about-grid,
  .z83131contact-wrap { grid-template-columns: 1fr; }
  .z83131content-layout { flex-direction: column; padding: 20px 16px 40px; }
  .z83131content-sidebar { width: 100%; }
  .z83131sidebar-article-list { max-height: none; }
}

@media (max-width: 860px) {
  .z83131nav-btn { display: flex; }

  .z83131nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(12, 26, 46, 0.45);
    z-index: 101;
  }

  .z83131nav-toggle:checked ~ .z83131nav .z83131nav-overlay {
    display: block;
  }

  .z83131nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: min(300px, 88vw);
    height: 100vh;
    background: var(--c-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 56px 16px 24px;
    gap: 4px;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 102;
    overflow-y: auto;
  }

  .z83131nav-toggle:checked ~ .z83131nav .z83131nav-panel {
    transform: translateX(0);
  }

  .z83131nav-toggle:checked ~ .z83131nav-btn span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .z83131nav-toggle:checked ~ .z83131nav-btn span:nth-child(2) { opacity: 0; }
  .z83131nav-toggle:checked ~ .z83131nav-btn span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .z83131nav-close {
    display: block;
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    border: none;
    background: var(--c-bg);
    border-radius: 8px;
  }
  .z83131nav-close::before,
  .z83131nav-close::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 18px;
    height: 2px;
    background: var(--c-dark);
  }
  .z83131nav-close::before { transform: translate(-50%, -50%) rotate(45deg); }
  .z83131nav-close::after { transform: translate(-50%, -50%) rotate(-45deg); }

  .z83131nav-link {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
  }

  .z83131svc-grid,
  .z83131home-articles { grid-template-columns: repeat(2, 1fr); }
  .z83131about-list { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .z83131block { padding: 40px 0; }
  .z83131container { padding: 0 14px; }
  .z83131svc-grid,
  .z83131home-articles,
  .z83131flow,
  .z83131sec-grid,
  .z83131about-list { grid-template-columns: 1fr; }
  .z83131stats-grid { grid-template-columns: 1fr 1fr; }
  .z83131list-item { flex-direction: column; }
  .z83131list-thumb { width: 100%; height: 160px; }
  .z83131related-item { flex-direction: column; }
  .z83131related-thumb { width: 100%; height: 140px; }
  .z83131article-nav-next { text-align: left; }
  .z83131panel { padding: 20px 16px; }
  .z83131pagelist-lr .pagenext,
  .z83131pagelist-lr li.pagenext { margin-left: 0; }
}