/* Layout */
.main{
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.main h2{
  font-size: 2rem;
  color: var(--ink);
}

.main a{
  color: var(--accent);
}

/* About */
.main .about_c{
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.7fr);
  gap: 32px;
  align-items: center;
  padding: 32px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(235, 244, 255, 0.95), rgba(255, 255, 255, 0.9));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.main .about_c_1 h2{
  margin-bottom: 12px;
}

.main .about_c_1 p{
  color: var(--muted);
}

.main .about_c_1 .i-link{
  display: block;
}

.main .about_c_1 .i-link + .i-link{
  margin-top: 12px;
}

.main .about_c_1 .i-row{
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.main .about_c_1 .i-row .i-link{
  flex: 1 1 0;
  min-width: 0;
  margin-top: 0;
}

.main .about_c_1 .i-row + .i-link{
  margin-top: 0;
}

.main .about_c_1 .i .i-svg{
  flex: 0 0 auto;
}

@media (max-width: 520px){
  .main .about_c_1 .i-row{
    flex-direction: column;
    gap: 12px;
  }
}

.main .about_c_1 .i{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.main .about_c_1 .i:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.main .about_c_1 .i span,
.main .about_c_1 .i p{
  color: var(--ink);
  margin: 0;
}

.main .about_c .avatar{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  min-height: 100%;
  gap: 12px;
}

.main .about_c .avatar img{
  width: min(260px, 60vw);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.main .about_c .avatar .caption{
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}

/* China assistant */
.china-assistant{
  display: flex;
  justify-content: center;
}

.china-assistant-card{
  width: min(920px, 94vw);
  padding: 18px 22px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 248, 240, 0.95), rgba(255, 255, 255, 0.95));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.china-assistant-card .label{
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.china-assistant-card .value{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
}

.china-assistant-card .hint{
  font-weight: 400;
  color: var(--muted);
}

/* FLL cards */
.main .fll_c{
  display: flex;
  justify-content: center;
}

.main .fll_c .fll_c_b h2{
  text-align: center;
  margin-bottom: 16px;
}

.main .fll_c .fll_c_div{
  display: grid;
  grid-template-columns: repeat(3, minmax(240px, 1fr));
  gap: 18px;
}

.main .fll_c .fll_c_item{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-soft);
}

.main .fll_c .fll_c_item h3{
  margin-bottom: 8px;
}

/* Projects */
.main .projects{
  text-align: center;
}

.main .projects .c{
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.main .projects .item{
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  text-align: left;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.main .projects .item .picture img{
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
}

.main .projects .item .picture{
  display: flex;
  align-items: stretch;
  grid-row: 1;
  padding: 6px;
  background: #f5f8ff;
  border-radius: 22px;
  border: 1px solid var(--line);
}

.main .projects .item .content{
  grid-row: 2;
}

.main .projects .item .content .citations{
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.main .projects .item .citations-list{
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #f5f8ff;
}

.main .projects .item .citations-list .label{
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin-bottom: 8px;
}

.main .projects .item .citations-list .citations{
  border-left: 2px solid #b7ccff;
  padding-left: 10px;
}

.main .projects .c a{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
}

/* Affiliations */
.affiliations{
  text-align: center;
}

.affiliations .aff-card{
  padding: 32px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  width: min(1160px, 94vw);
  margin: 0 auto;
}

.affiliations .aff-card .top-row{
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.affiliations .aff-card .left{
  display: flex;
  gap: 24px;
  align-items: center;
}

.affiliations .aff-card .avatar{
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: var(--shadow-soft);
}

.affiliations .aff-card .meta{
  text-align: left;
}

.affiliations .aff-card .meta .name{
  font-size: 1.35rem;
  color: var(--ink);
}

.affiliations .aff-card .meta .role,
.affiliations .aff-card .meta .fields{
  color: var(--muted);
}

.affiliations .aff-card .right{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.affiliations .inst{
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.affiliations .inst .logo{
  height: 64px;
  margin: 0 auto 8px;
}

/* Wechat */
.wechat{
  text-align: left;
}

.wechat > h2{
  text-align: center;
}

.wechat .c{
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.wechat .card{
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr) minmax(0, 0.6fr);
  gap: 20px;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.wechat .card .left{
  display: flex;
  gap: 16px;
  align-items: center;
}

.wechat .card .avatar{
  width: 140px;
  height: 140px;
  border-radius: 20px;
  object-fit: cover;
}

.wechat .card .follow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-2);
  color: #fff;
}

.wechat .card .right{
  text-align: center;
}

.wechat .card .qr{
  width: 150px;
  height: 150px;
  border-radius: 16px;
  border: 1px solid var(--line);
}

.wechat .columns{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.wechat .col-card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-soft);
}

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

.wechat .bullets li{
  position: relative;
  padding-left: 14px;
  margin-top: 8px;
  color: var(--muted);
}

.wechat .bullets li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.wechat .chips{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.wechat .chip{
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px dashed var(--line);
  background: #fff;
  color: var(--muted);
}

.wechat .extras{
  padding: 18px 20px;
  border-radius: var(--radius);
  background: #f5f8ff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.wechat .extras .note{
  color: var(--muted);
}


/* Responsive */
@media (max-width: 1100px){
  .main .about_c{
    grid-template-columns: 1fr;
  }
  .main .projects .item{
    grid-template-columns: 1fr;
  }
  .affiliations .aff-card .top-row{
    grid-template-columns: 1fr;
  }
  .affiliations .aff-card .right{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .wechat .card{
    grid-template-columns: 1fr;
  }
  .wechat .columns{
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px){
  .main{
    gap: 40px;
  }
  .main .fll_c .fll_c_div{
    grid-template-columns: 1fr;
  }
  .affiliations .aff-card .right{
    grid-template-columns: 1fr;
  }
  .affiliations .aff-card .left{
    flex-direction: column;
    text-align: center;
  }
  .affiliations .aff-card .meta{
    text-align: center;
  }
  .china-assistant-card{
    justify-content: center;
    text-align: center;
  }
}



/* Open Tutorials entrance */
.tutorials-entrance{
  text-align: center;
}

.tutorials-entrance-card{
  padding: 32px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(235, 244, 255, 0.95), rgba(255, 255, 255, 0.9));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  text-align: left;
}

.tutorials-entrance-text h3{
  margin-bottom: 6px;
}

.tutorials-entrance-text p{
  max-width: 560px;
}

.tutorials-entrance-topics{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.topic-chip{
  padding: 5px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--muted);
}

.tutorials-entrance-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease;
}

.tutorials-entrance-btn:hover{
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

@media (max-width: 800px){
  .tutorials-entrance-card{
    flex-direction: column;
    text-align: center;
  }
  .tutorials-entrance-topics{
    justify-content: center;
  }
}