/* gu1 - 钢青研究报告风 | 主色 #0369A1 */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
.z51222body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  font-size:16px;line-height:1.7;color:#0f2744;background:#eef3f8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;word-wrap:break-word
}
.z51222container{width:100%;max-width:1100px;margin:0 auto;padding:0 18px}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;height:auto;display:block}
.z51222ad{padding:12px 0;overflow:hidden}
.z51222ad .z51222container{overflow:hidden;max-width:100%}
.z51222ad img,.z51222ad iframe{max-width:100%}

/* Header masthead */
.z51222header{background:#fff;border-bottom:1px solid #c9d7e6;position:sticky;top:0;z-index:100}
.z51222masthead{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:14px 0 8px;border-bottom:2px solid #0369a1
}
.z51222logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.z51222logo_mark{
  width:36px;height:36px;background:#0369a1;color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center
}
.z51222logo_text{font-size:20px;font-weight:800;color:#0c4a6e;letter-spacing:.5px}
.z51222masthead_tag{font-size:12px;color:#5b7390;max-width:420px;text-align:right}
.z51222nav{display:flex;flex-wrap:wrap;gap:0;padding:8px 0}
.z51222nav_item{
  padding:8px 12px;font-size:14px;color:#3d5a78;border-right:1px solid #d5e2ef
}
.z51222nav_item:last-child{border-right:none}
.z51222nav_item:hover,.z51222nav_active{color:#0369a1;font-weight:700;background:#e8f3fb}

/* Buttons */
.z51222btn{
  display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;
  font-size:14px;font-weight:700;border:1px solid transparent;max-width:100%;text-align:center
}
.z51222btn_primary{background:#0369a1;color:#fff;border-color:#0369a1}
.z51222btn_primary:hover{background:#075985}
.z51222btn_ghost{background:#fff;color:#0369a1;border-color:#7dd3fc}
.z51222btn_ghost:hover{background:#e0f2fe}
.z51222btn_light{background:#fff;color:#0369a1;border-color:#fff}

/* Hero - report frame */
.z51222hero{padding:36px 0 28px}
.z51222hero_frame{
  display:grid;grid-template-columns:1.15fr .85fr;gap:0;background:#fff;
  border:1px solid #c9d7e6;overflow:hidden;min-width:0
}
.z51222hero_left{padding:28px 24px;min-width:0;border-right:1px solid #c9d7e6}
.z51222series{font-size:12px;font-weight:700;color:#0369a1;letter-spacing:1px;margin-bottom:10px}
.z51222hero_title{font-size:clamp(24px,3.8vw,34px);line-height:1.35;color:#0c4a6e;margin-bottom:12px}
.z51222hero_desc{font-size:15px;color:#3d5a78;margin-bottom:12px}
.z51222hero_body{font-size:14px;color:#5b7390;margin-bottom:20px}
.z51222hero_btns{display:flex;flex-wrap:wrap;gap:10px}
.z51222hero_right{padding:16px;background:#f5f9fc;min-width:0}
.z51222hero_imgbox{border:1px solid #c9d7e6;background:#fff;padding:6px;overflow:hidden}
.z51222hero_imgbox img{width:100%;aspect-ratio:16/10;object-fit:cover}
.z51222hero_meta{margin-top:12px}
.z51222hero_meta li{
  font-size:13px;color:#3d5a78;padding:8px 0;border-bottom:1px dashed #c9d7e6
}
.z51222hero_meta li:last-child{border-bottom:none}
.z51222hero_meta strong{color:#0369a1;margin-right:8px}

/* KPI strip */
.z51222kpi{background:#0c4a6e;color:#e0f2fe;padding:18px 0}
.z51222kpi_row{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.z51222kpi_item{
  text-align:center;padding:10px 8px;border-right:1px solid rgba(224,242,254,.2);min-width:0
}
.z51222kpi_item:last-child{border-right:none}
.z51222kpi_item b{display:block;font-size:clamp(20px,3vw,28px);line-height:1.2}
.z51222kpi_item span{font-size:12px;opacity:.85}

/* Sections */
.z51222section{padding:48px 0;overflow:hidden}
.z51222bg{background:#fff}
.z51222sec_head{margin-bottom:22px;padding-bottom:12px;border-bottom:1px solid #c9d7e6}
.z51222h2{font-size:clamp(22px,3vw,28px);color:#0c4a6e;font-weight:800;margin-bottom:6px}
.z51222h2_desc{font-size:14px;color:#5b7390}

/* Quote bar */
.z51222quote_bar{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.z51222quote{
  background:#fff;border:1px solid #c9d7e6;border-top:3px solid #0369a1;
  padding:14px 12px;min-width:0;overflow:hidden
}
.z51222quote h3{font-size:13px;color:#5b7390;margin-bottom:6px;font-weight:600}
.z51222price{font-size:20px;font-weight:800;line-height:1.2;word-break:break-all}
.z51222quote span{display:block;font-size:12px;margin-top:2px}
.z51222quote em{display:block;font-style:normal;font-size:12px;color:#5b7390;margin-top:8px}
.z51222up{color:#c0392b}
.z51222down{color:#0369a1}

/* Cards */
.z51222insight_grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.z51222card{
  background:#fff;border:1px solid #c9d7e6;padding:18px 16px;min-width:0;overflow:hidden
}
.z51222bg .z51222card{background:#eef3f8}
.z51222card h3{font-size:16px;color:#0c4a6e;margin-bottom:8px}
.z51222card p{font-size:14px;color:#3d5a78}
.z51222card_accent{border-left:4px solid #0369a1}
.z51222tag{font-size:12px;font-weight:700;color:#0369a1;margin-bottom:8px}

/* Sectors */
.z51222sector_layout{display:grid;grid-template-columns:1.25fr .75fr;gap:12px;margin-bottom:14px}
.z51222sector_lead{
  background:#0c4a6e;color:#dbeafe;padding:24px 20px;border:1px solid #0c4a6e;min-width:0
}
.z51222sector_lead h3{font-size:20px;color:#fff;margin-bottom:10px}
.z51222sector_lead p{font-size:14px;margin-bottom:12px;opacity:.95}
.z51222sector_lead li{
  font-size:13px;padding:6px 0 6px 14px;position:relative;border-bottom:1px dashed rgba(219,234,254,.25)
}
.z51222sector_lead li:last-child{border-bottom:none}
.z51222sector_lead li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;background:#7dd3fc}
.z51222sector_list{display:flex;flex-direction:column;gap:10px;min-width:0}
.z51222sector_list article{
  background:#fff;border:1px solid #c9d7e6;padding:14px;flex:1;min-width:0
}
.z51222sector_list h4{font-size:15px;color:#0369a1;margin-bottom:4px}
.z51222sector_list p{font-size:13px;color:#3d5a78}
.z51222keywords{display:flex;flex-wrap:wrap;gap:8px}
.z51222keywords span{
  font-size:12px;color:#0c4a6e;background:#fff;border:1px solid #c9d7e6;padding:5px 10px
}

/* Strategy */
.z51222strategy_cols{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}

/* News */
.z51222news{display:grid;grid-template-columns:1.2fr .8fr;gap:12px}
.z51222news_main{
  background:#0369a1;color:#e0f2fe;padding:24px 20px;border:1px solid #0369a1;min-width:0
}
.z51222news_main h3{font-size:22px;color:#fff;margin-bottom:10px;line-height:1.4}
.z51222news_main p{font-size:14px;margin-bottom:14px}
.z51222news_main span{font-size:12px;opacity:.8}
.z51222news_side{border:1px solid #c9d7e6;background:#fff;min-width:0}
.z51222news_side article{padding:14px 16px;border-bottom:1px solid #d5e2ef}
.z51222news_side article:last-child{border-bottom:none}
.z51222news_side h4{font-size:15px;color:#0c4a6e;margin-bottom:2px}
.z51222news_side p{font-size:12px;color:#5b7390}

/* Path */
.z51222path{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.z51222path_item{
  background:#fff;border:1px solid #c9d7e6;padding:16px 14px;min-width:0;text-align:left
}
.z51222path_item span{display:block;font-size:12px;font-weight:700;color:#0369a1;margin-bottom:6px}
.z51222path_item h3{font-size:16px;color:#0c4a6e;margin-bottom:6px}
.z51222path_item p{font-size:13px;color:#3d5a78}

/* About + FAQ */
.z51222about_grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.z51222faq{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.z51222faq article{background:#fff;border:1px solid #c9d7e6;padding:16px;min-width:0}
.z51222bg .z51222faq article{background:#eef3f8}
.z51222faq h3{font-size:15px;color:#0c4a6e;margin-bottom:6px}
.z51222faq p{font-size:14px;color:#3d5a78}

/* CTA */
.z51222cta{background:#0c4a6e;color:#bae6fd;text-align:center;padding:44px 0}
.z51222cta_title{font-size:clamp(20px,3vw,28px);color:#fff;margin-bottom:10px}
.z51222cta_text{font-size:14px;margin-bottom:18px;max-width:700px;margin-left:auto;margin-right:auto}

/* Footer */
.z51222footer{background:#082f49;color:#7dd3fc;padding:40px 0 20px}
.z51222footer_grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:22px;margin-bottom:18px}
.z51222footer .z51222logo_text{color:#fff}
.z51222footer_about{font-size:13px;margin-top:10px;line-height:1.7}
.z51222footer_h{font-size:14px;color:#fff;margin-bottom:10px}
.z51222footer_links li{margin-bottom:6px}
.z51222footer_links a{font-size:13px;color:#7dd3fc}
.z51222footer_links a:hover{color:#fff}
.z51222footer_risk{font-size:12px;line-height:1.7;opacity:.9}
.z51222flink{border-top:1px solid rgba(125,211,252,.2);padding-top:14px;margin-bottom:14px}
.z51222flink_list{display:flex;flex-wrap:wrap;gap:8px 14px}
.z51222flink_list a{font-size:13px;color:#7dd3fc}
.z51222flink_list a:hover{color:#fff}
.z51222footer_bottom{border-top:1px solid rgba(125,211,252,.2);padding-top:12px;font-size:12px;opacity:.85}
.z51222copyright a{color:#fff}
.z51222powerby{margin-top:6px}

/* Responsive */
@media (max-width:1100px){
  .z51222quote_bar{grid-template-columns:repeat(3,1fr)}
  .z51222insight_grid,.z51222strategy_cols,.z51222path,.z51222about_grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .z51222hero_frame,.z51222sector_layout,.z51222news{grid-template-columns:1fr}
  .z51222hero_left{border-right:none;border-bottom:1px solid #c9d7e6}
  .z51222footer_grid{grid-template-columns:1fr 1fr}
  .z51222kpi_row{grid-template-columns:repeat(2,1fr)}
  .z51222kpi_item{border-right:none;border-bottom:1px solid rgba(224,242,254,.15)}
  .z51222masthead_tag{text-align:left;max-width:100%}
}
@media (max-width:768px){
  .z51222container{padding:0 14px}
  .z51222section{padding:36px 0}
  .z51222nav_item{padding:7px 10px;font-size:13px;border-right:none}
  .z51222quote_bar,.z51222insight_grid,.z51222strategy_cols,.z51222path,
  .z51222about_grid,.z51222faq,.z51222footer_grid{grid-template-columns:1fr}
  .z51222hero_btns{flex-direction:column}
  .z51222btn{width:100%}
  .z51222hero_left,.z51222news_main,.z51222sector_lead{padding:18px 16px}
  .z51222quote,.z51222card,.z51222path_item,.z51222faq article{padding:14px}
}
@media (max-width:480px){
  .z51222kpi_row{grid-template-columns:1fr}
  .z51222logo_text{font-size:17px}
  .z51222price{font-size:18px}
}