:root {
  --color-main: #1a5f3f; 
  --color-main-hover: #1a5f28; 
  --color-card-bg: #f0f5f3; 
  --color-divider: #c2d69c; 
  --color-btn-normal: #CDCBCA; 
  --color-btn-hover: #d1d8e0; 
  --color-body: #F8F9FA;  
  --color-text: #222; 
 
  --site-max-width: 1200px;   
  --rec-max-width: 100%;  
  --break-point: 1000px; 
  --nav-btn-min: 42px; 
  --nav-padding-h: 3px;   
  --nav-font-size: 15px; 
  
  --gap-nav: 1px;  
  --gap-nav-row: 2px; 
  --gap-btn: 12px;   
  --margin-block: 50px; 

  --radius-card: 14px; 
  --radius-btn: 99px; 
  --radius-float: 50%; 
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  font-family: "Microsoft Yahei", SimSun, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-body);
}
ul {
  list-style: none;
}
a {
  text-decoration: none;
  color: inherit;
}

.container {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 1rem;
  width: 100%;
}

header.page-dark-nav {
  background-color: var(--color-main);
  color: #ffffff;
}

header {
  background: transparent;
  color: inherit;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 4px;
  row-gap: 4px;
  padding: 20px 1rem;
  max-width: var(--site-max-width);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.logo {
  font-size: 1.25rem;
  font-weight: bold;
  padding: 6px 0;
  flex-shrink: 0;
  display: flex;
  align-items: center; 
  gap: 8px;   
}
.logo img {
  height: 32px;
}
.logo > span {
  margin-top: 1px; 
}

@media (max-width:800px){
  .logo img{
    height:30px !important;
  }
}

.nav-links {
  display: flex;
  flex: 1;
  max-width: calc(var(--site-max-width) - 180px);
  margin-left: auto;
  flex-wrap: wrap !important;
  gap: var(--gap-nav);
  row-gap: var(--gap-nav-row);
  justify-content: flex-end;
}
.nav-links li {
  flex: 0 0 auto;
  flex-basis: auto;
  min-width: var(--nav-btn-min);
  flex-shrink: 0;
}
.nav-links li a {
  display: block;
  padding: 6px var(--nav-padding-h);
  border-radius: 4px;
  transition: background 0.2s;
  white-space: nowrap;
  text-align: center;
  font-size: var(--nav-font-size);
}
.nav-links li a:hover {
  background-color: rgba(160, 220, 180, 0.4);
}

.breadcrumb-wrap {
  background-color: #f6f7f9;
  padding: 12px 0;
}
.breadcrumb {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 1rem;
  font-size: 0.95rem;
  color: #555;
}
.breadcrumb a {
  color: var(--color-main);
}
.breadcrumb span {
  margin: 0 6px;
  color: #aaa;
}

.page-btn-group {
  margin: 40px auto;
  width: 100%;
  max-width: var(--site-max-width);
  padding: 0 1rem;
  box-sizing: border-box;
  display: grid;
  place-items: center;
}
.page-btn-group .btn-wrap {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.round-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--color-btn-normal);
  color: var(--color-main);
  border-radius: var(--radius-btn);
  font-size: 14px;
  transition: 0.2s;
}
.round-btn:hover {
  background: var(--color-btn-hover);
}

.back-top-float {
  position: fixed;
  right: 1rem;
  bottom: 40px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-float);
  background-color: var(--color-main);
  background-image: url('../images/back-top2.png');
  background-size: 20px 30px;
  background-position: center;
  background-repeat: no-repeat;
  display: block;
  z-index: 99;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  transition: opacity 0.3s ease;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.back-top-float.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.back-top-float:hover {
  background-color: var(--color-main-hover);
}

@media (max-width:800px){
  header nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .nav-links {
    width: 100%;
    max-width: unset;
    margin-left: unset;
    justify-content: flex-end;
  }
  h1 {
    font-size: 1.6rem;
  }
}

@media screen and (orientation: portrait) {
  .article-gallery {
    grid-template-columns: 1fr !important;
  }
}

footer {
  background-color: #e2e4e6;
  color: #333;
  text-align: center;
  margin-top: 28px;
  padding: 20px 0;
}
.copyright-line1 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.content-wrapper {
  max-width: var(--site-max-width);
  margin: 0 auto;
  width: 100%;
}
.article-content p {
  text-indent: 2em;
  line-height: 1.8;
  margin: 0.8em 0;
  font-size: 1.05rem;
}
h1 {
  text-align: center;
  margin: 1.2em 0;
  line-height: 1.5;
  font-size: 2rem;
  font-weight: bold;
  color: var(--color-main);
}
h2 {
  margin: 1.6em 0 0.6em;
  font-size: 1.35rem;
  border-left: 4px solid var(--color-main);
  padding-left: 10px;
}
.article-media {
  width: 100%;
  display: block;
  margin: 28px 0;
  border-radius: 4px;
  overflow: hidden;
}
.article-media img,
.article-media video,
.article-media iframe {
  width: 100%;
  display: block;
}
.article-figure figcaption {
  text-align:center;
  padding:8px 12px;
  color:#555;
  font-size:0.95rem;
  background:#f8fdfa;
}

.article-wrap-two {
  display: flex;
  gap: 30px;
  margin: 30px 0;
  padding: 0;
}
.article-side-left {
  width: 320px;
  flex-shrink: 0;
  padding: 0 0.6rem;
}
.article-main-right {
  flex: 1;
  padding: 0 0.6rem;
}
.side-info-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  position: sticky;
  top: 20px;
}
.side-info-card h4 {
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
  margin-bottom: 16px;
}
.side-item {
  margin: 12px 0;
  font-size: 0.98rem;
}
.side-item label {
  color: var(--color-main);
  font-weight: bold;
  display: inline-block;
  min-width: 80px;
}

@media (min-width: 1001px) {
  .article-wrap-two {
    flex-direction: row;
  }
  .article-main-right {
    min-width: 360px; 
	max-width: 800px; 
  }
  .side-info-card {
    position: sticky;
  }
}

@media (max-width: 1000px) {
  .article-wrap-two {
    flex-direction: column;
    gap: 20px;
  }
  .article-side-left,
  .article-main-right {
    width: 100%;
    padding: 0;
	min-width: 0;  
  }
  .side-info-card {
    position: static;
  }
}

@media (max-width: 768px) {
  .article-media {
    padding: 0 0.3rem;
  }
}

.recommend-block {
  max-width: var(--rec-max-width);
  margin: var(--margin-block) auto;
  background: var(--color-card-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.recommend-left h3 {
  color: var(--color-main);
  font-size: 1.2rem;
  text-align: center;
  white-space: nowrap;
}

@media screen and (min-width: 901px) {
  .recommend-block {
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  .recommend-left {
    width: 200px;
    flex-shrink: 0;
    padding: 24px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
 
  .rec-article .recommend-left {
    writing-mode: vertical-rl;
    text-orientation: upright;
  }
  .rec-article .recommend-left h3 {
    letter-spacing: 4px;
  }
  
  .rec-col .recommend-left {
    writing-mode: unset;
    text-orientation: unset;
  }
  
  .recommend-divider {
    width: 1px;
    background: var(--color-divider);
    flex-shrink: 0;
    align-self: stretch;
    margin: 20px 0;
  }
  .recommend-right {
    flex: 1;
    min-width: 0;
    padding: 24px;
  }
}


@media screen and (max-width: 900px) {
  .recommend-block {
    display: block;
  }
  .rec-article .recommend-left,
  .rec-col .recommend-left {
    width: 100%;
    padding: 16px 14px 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
  }
  
  .recommend-divider {
    width: calc(100% - 30px);
    height: 1px;
    background: var(--color-divider);
    margin: 0 auto;
  }
  .recommend-right {
    width: 100%;
    padding: 24px;
  }
}

.rec-col .col-btn-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-btn);
  justify-content: center;
}
.rec-col .col-btn {
  display: inline-block !important;
  padding: 6px 14px !important;
  background: var(--color-btn-normal) !important;
  border-radius: var(--radius-btn) !important;
  color: var(--color-main) !important;
  font-size: 14px !important;
  transition: 0.2s !important;
}
.rec-col .col-btn:hover {
  background: var(--color-btn-hover) !important;
}
.rec-col ul {
	display: none;
}

.rec-article ul {
  list-style: none;
  padding:0 10px;
}
.rec-article ul li {
  margin: 12px 0;
  font-size: 1rem;
}
.rec-article ul li a {
  color: var(--color-text);
}
.rec-article ul li a:hover {
  color: var(--color-main);
  text-decoration: underline;
}
.rec-article .col-btn-wrap { display: none; }