/* ================================================================
   index.css — 首页专用样式（仅首页 index.html 使用）
   加载顺序：fonts.css → common.css → index.css
   此文件覆盖 common.css 中固定白底导航为透明导航，并定义首页专属区块
   ================================================================ */

/* ===== 顶部导航 - 透明覆盖（覆盖 common.css 的固定白底） ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:var(--z-sticky);height:var(--nav-h);transition:all var(--transition);background:transparent;box-shadow:none;backdrop-filter:none}
.header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 2px 20px rgba(0,0,0,.08);backdrop-filter:blur(10px)}
.logo-img{height:80px;width:auto;object-fit:contain;transition:all var(--transition);mix-blend-mode:multiply;filter:drop-shadow(0 2px 6px rgba(0,0,0,.15))}
.header.scrolled .logo-img{height:70px;mix-blend-mode:normal;filter:drop-shadow(0 1px 3px rgba(0,0,0,.08))}
.stock-code{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:30px;background:rgba(255,255,255,.1);border:1px solid rgba(200,164,92,.35);backdrop-filter:blur(6px);transition:all var(--transition)}
.header.scrolled .stock-code{background:linear-gradient(135deg,rgba(26,57,130,.06),rgba(200,164,92,.08));border-color:rgba(200,164,92,.4)}
.stock-code .sc-label{font-size:13px;color:rgba(255,255,255,.75);letter-spacing:1px}
.header.scrolled .stock-code .sc-label{color:var(--c-gray-500)}
.stock-code .sc-num{font-size:15px;font-weight:700;color:var(--c-gold-light);letter-spacing:1px;text-shadow:0 0 8px rgba(200,164,92,.3)}
.header.scrolled .stock-code .sc-num{color:var(--c-primary);text-shadow:none}
.nav-link{display:block;padding:10px clamp(14px,1.6vw,28px);font-size:16px;font-weight:500;color:var(--c-white);letter-spacing:1px;transition:color var(--transition);position:relative;white-space:nowrap}
.header.scrolled .nav-link{color:#1a1a1a}
.nav-link:hover,.nav-link.active{color:var(--c-gold)}
.header.scrolled .nav-link:hover,.header.scrolled .nav-link.active{color:var(--c-primary)}
.mobile-toggle span{background:var(--c-white);transition:all var(--transition)}
.header.scrolled .mobile-toggle span{background:var(--c-primary)}

/* ===== Hero Banner轮播 ===== */
.hero{position:relative;height:100vh;min-height:640px;overflow:hidden}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1.2s ease;background-size:cover;background-position:center}
.hero-slide.active{opacity:1}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(26,57,130,.45) 0%,rgba(26,57,130,.2) 50%,rgba(26,57,130,.05) 100%);z-index:1}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;padding:0 var(--side-pad);max-width:850px}
.hero-slide-content{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity 1s ease,transform 1s ease;transform:translateY(30px)}
.hero-slide-content.active{opacity:1;visibility:visible;transform:translateY(0)}
.hero-cn{font-size:56px;font-weight:700;color:var(--c-white);line-height:1.35;letter-spacing:3px;margin-bottom:18px}
.hero-cn .dot{color:var(--c-gold);margin:0 12px;font-weight:400}
.hero-en{font-family:var(--font-cn);font-size:18px;font-weight:400;color:rgba(255,255,255,.75);letter-spacing:2px;line-height:1.9}
.hero-dots{position:absolute;bottom:36px;left:var(--side-pad);z-index:3;display:flex;gap:12px}
.hero-dot{width:48px;height:3px;background:rgba(255,255,255,.3);cursor:pointer;transition:all var(--transition);border-radius:2px}
.hero-dot.active{background:var(--c-gold);width:72px}

/* ===== 数据统计区 ===== */
.stats{background:var(--c-primary);padding:45px 0;position:relative;overflow:hidden}
.stats::before{content:'';position:absolute;top:-50%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(59,111,212,.15),transparent 70%);border-radius:50%}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;z-index:1}
.stat-item{text-align:center;padding:10px}
.stat-item:not(:last-child){border-right:1px solid rgba(255,255,255,.1)}
.stat-num{font-size:46px;font-weight:700;color:var(--c-white);line-height:1;margin-bottom:10px;display:flex;align-items:baseline;justify-content:center;gap:4px}
.stat-num .suffix{font-size:18px;font-weight:400;color:var(--c-gold)}
.stat-label{font-size:14px;color:rgba(255,255,255,.7);letter-spacing:2px}

/* ===== 关于集团 ===== */
.about{background:var(--c-white)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-text h2{font-size:34px;font-weight:700;color:var(--c-primary);margin-bottom:8px;line-height:1.3;padding-top:4px;position:relative}
.about-text h2::before{content:'';position:absolute;top:-4px;left:0;width:40px;height:3px;background:var(--c-gold);border-radius:2px}
.about-text .sub-title{font-size:16px;color:var(--c-gray-500);margin-bottom:28px;padding-bottom:24px;border-bottom:1px solid var(--c-gray-100)}
.about-text p{font-size:15px;color:var(--c-gray-700);line-height:1.9;margin-bottom:20px}
.about-tags{display:flex;flex-wrap:wrap;gap:10px;margin:28px 0 32px}
.about-tag{padding:8px 18px;background:var(--c-gray-50);border:1px solid var(--c-gray-100);border-radius:30px;font-size:13px;color:var(--c-gray-700);transition:all var(--transition)}
.about-tag:hover{background:var(--c-primary);color:var(--c-white);border-color:var(--c-primary)}
.about-video{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);cursor:pointer}
.about-video img{width:100%;height:460px;object-fit:cover;transition:transform .8s ease}
.about-video:hover img{transform:scale(1.05)}
.about-video::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,57,130,.3),rgba(26,57,130,.5))}
.about-video .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2;width:76px;height:76px;border-radius:50%;background:rgba(255,255,255,.2);border:2px solid rgba(255,255,255,.5);display:flex;align-items:center;justify-content:center;transition:all var(--transition);backdrop-filter:blur(4px)}
.about-video:hover .play-btn{background:var(--c-gold);border-color:var(--c-gold);transform:translate(-50%,-50%) scale(1.1)}
.about-video .play-btn svg{width:28px;height:28px;fill:var(--c-white);margin-left:4px}

/* ===== 视频弹窗 ===== */
.video-modal{position:fixed;inset:0;z-index:var(--z-modal);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .4s var(--ease-out-quart)}
.video-modal.active{opacity:1;visibility:visible}
.video-modal-mask{position:absolute;inset:0;background:rgba(0,0,0,.85);backdrop-filter:blur(4px)}
.video-modal-box{position:relative;width:90%;max-width:960px;aspect-ratio:16/9;background:var(--c-dark);border-radius:var(--radius-md);overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5);transform:scale(.9);transition:transform .4s var(--ease-out-quart)}
.video-modal.active .video-modal-box{transform:scale(1)}
.video-modal-close{position:absolute;top:-44px;right:0;width:36px;height:36px;font-size:28px;color:var(--c-white);z-index:2;display:flex;align-items:center;justify-content:center;transition:transform var(--transition)}
.video-modal-close:hover{transform:rotate(90deg)}
.video-player{width:100%;height:100%;position:relative}
.video-player video{width:100%;height:100%;object-fit:cover;display:none}
.video-modal.active .video-player video{display:block}
.video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:linear-gradient(135deg,var(--c-primary),var(--c-dark));color:var(--c-white)}
/* 后台上传视频后（.video-player 加 has-video），隐藏「待上传」占位层 */
.video-player.has-video .video-placeholder{display:none}
.video-placeholder p{font-size:20px;font-weight:500}
.video-placeholder span{font-size:13px;color:rgba(255,255,255,.5)}

/* ===== 业务中心（5项） ===== */
.business{background:var(--c-gray-50)}
.business-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.biz-card{position:relative;border-radius:var(--radius-md);overflow:hidden;cursor:pointer;background:var(--c-white);box-shadow:var(--shadow-sm);transition:all var(--transition)}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.biz-card-img{height:245px;overflow:hidden;position:relative}
.biz-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.biz-card:hover .biz-card-img img{transform:scale(1.1)}
.biz-card-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(26,57,130,.6),transparent 60%)}
.biz-card-num{position:absolute;top:14px;left:14px;z-index:2;font-family:var(--font-en);font-size:12px;font-weight:600;color:var(--c-gold);background:rgba(26,57,130,.6);padding:4px 10px;border-radius:3px;letter-spacing:1px}
.biz-card-body{padding:20px}
.biz-card-body h3{font-size:17px;font-weight:700;color:var(--c-primary);margin-bottom:8px}
.biz-card-body p{font-size:13px;color:var(--c-gray-500);line-height:1.8;margin-bottom:14px}
.biz-card-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--c-accent-blue);transition:gap var(--transition)}
.biz-card:hover .biz-card-link{gap:12px}

/* ===== 新闻动态（三类） ===== */
.news{background:var(--c-white)}
.news-tabs{display:flex;justify-content:center;gap:0;margin-bottom:48px;border-bottom:2px solid var(--c-gray-100)}
.news-tab{padding:14px 40px;font-size:16px;font-weight:500;color:var(--c-gray-500);cursor:pointer;position:relative;transition:all var(--transition);letter-spacing:2px}
.news-tab:hover{color:var(--c-primary)}
.news-tab.active{color:var(--c-primary);font-weight:600}
.news-tab::after{content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);width:0;height:3px;background:var(--c-gold);transition:width var(--transition);border-radius:2px}
.news-tab.active::after{width:100%}
.news-panel{display:none}
.news-panel.active{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.news-card{border-radius:var(--radius-lg);overflow:hidden;background:var(--c-white);box-shadow:var(--shadow-sm);transition:all var(--transition);cursor:pointer;position:relative}
.news-card::before{content:'';position:absolute;top:0;left:0;width:0;height:4px;background:var(--c-gold);transition:width var(--transition);z-index:3;border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.news-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.news-card:hover::before{width:100%}
.news-img{height:210px;overflow:hidden;position:relative}
.news-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.news-card:hover .news-img img{transform:scale(1.08)}
.news-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.25),transparent 50%);pointer-events:none}
.news-date-tag{position:absolute;top:0;left:0;background:var(--c-primary);color:var(--c-white);padding:10px 16px;text-align:center;line-height:1.2;border-bottom-right-radius:8px;z-index:4}
.news-date-tag .nd{font-size:26px;font-weight:700;color:var(--c-gold);line-height:1.1}
.news-date-tag .ny{font-size:11px;letter-spacing:1px;margin-top:2px}
.news-cat{position:absolute;top:0;right:0;background:#fff;color:var(--c-primary);padding:7px 16px;font-size:12px;font-weight:600;border-bottom-left-radius:8px;z-index:5;letter-spacing:1px;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.news-body{padding:26px 24px 24px}
.news-body h3{font-size:17px;font-weight:700;color:var(--c-dark);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--transition)}
.news-card:hover .news-body h3{color:var(--c-primary)}
.news-body p{font-size:13px;color:var(--c-gray-500);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:18px}
.news-footer{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid var(--c-gray-100)}
.news-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--c-accent-blue);transition:all var(--transition)}
.news-card:hover .news-link{gap:10px;color:var(--c-primary)}
.news-meta{font-size:12px;color:var(--c-gray-300)}

/* ===== 合作伙伴（右向左流动） ===== */
.partners{background:var(--c-gray-50);padding:80px 0;overflow:hidden}
.partners-scroll{overflow:hidden;padding:10px 0;position:relative;mask-image:linear-gradient(90deg,transparent 0,#000 60px,#000 calc(100% - 60px),transparent 100%);-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 60px,#000 calc(100% - 60px),transparent 100%)}
.partner-track{display:flex;gap:24px;width:max-content;animation:marquee 30s linear infinite}
.partner-track:hover{animation-play-state:paused}
@keyframes marquee{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}
.partner-item{display:flex;flex-direction:column;align-items:center;gap:10px;flex-shrink:0}
.partner-logo{display:flex;align-items:center;justify-content:center;min-width:220px;height:110px;background:var(--c-white);border-radius:var(--radius-md);border:1px solid var(--c-gray-100);transition:all var(--transition);cursor:pointer;padding:16px 24px}
.partner-logo img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.partner-name{font-size:14px;font-weight:500;color:var(--c-gray-500);letter-spacing:1px;transition:color var(--transition);text-align:center}
.partner-logo:hover{border-color:var(--c-accent-blue);box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.partner-item:hover .partner-name{color:var(--c-primary)}

/* ===== 首页专属响应式（通用响应式见 common.css） ===== */
@media(max-width:1200px){
  .business-grid{grid-template-columns:repeat(3,1fr)}
  .news-panel.active{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:1024px){
  .hero-cn{font-size:38px}
  .hero-en{font-size:13px}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .news-panel.active{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .stat-item:nth-child(2){border-right:none}
  .about-video img{height:320px}
}
@media(max-width:640px){
  .section{padding:60px 0}
  .about-text h2{font-size:26px;}
  .section-title h2{font-size:26px}
  .hero-cn{font-size:28px;letter-spacing:2px}
  .hero-en{font-size:12px}
  .business-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .biz-card-img {height: auto;}
  .stat-num{font-size:32px}
  .about-video img{height:260px}
  .news-tabs{flex-wrap:wrap}
  .news-tab{padding:10px 20px;font-size:14px}    
  .logo-img { height: 44px; }
.stock-code {padding: 6px 9px;gap: 2px;}
.stock-code .sc-num {font-size: 12px;}
.header.scrolled .logo-img {height: 44px;}
footer .footer-col{display: none;}
}