/* =========================================================
   资讯 (News) + 首页 (Home) — 设计语言对齐 tydsbao.com
   主品牌 violet #5a3aff，渐变 #5a3aff→#e830f8，文字 #1b1f21
   ========================================================= */
:root{
  --ll-brand-color:#5a3aff;
  --ll-brand-color-hover:#5235e8;
  --ll-brand-gradient:linear-gradient(135deg,#5a3aff 0%,#e830f8 100%);
  --ll-brand-gradient-soft:linear-gradient(135deg,#6a4dff 0%,#b04df5 100%);
  --ll-text-color-1:#1b1f21;
  --ll-text-color-2:#4e5969;
  --ll-text-color-3:#86909c;
  --ll-text-color-4:#c9cdd4;
  --ll-border:#e8eaed;
  --ll-bg:#fafafa;
  --ll-top-padding:68px;
  --ll-title-mb:48px;
  --ll-container-w:1140px;
  --ll-container-pd:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{
  font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,Open Sans,Arial,Hiragino Sans GB,微软雅黑,STHeiti,SimSun,sans-serif;
  color:var(--ll-text-color-1);
  background:#fff;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul,ol,dl,dd{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.ll-container{width:100%;max-width:var(--ll-container-w);margin:0 auto;padding:0 var(--ll-container-pd)}

/* ===================== Header / Nav ===================== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--ll-border)}
.header-inner{height:68px;display:flex;align-items:center}
.site-header .header{width:100%;display:flex;align-items:center;gap:40px}
.site-logo{display:flex;align-items:center;flex-shrink:0}
.site-logo img{height:40px;width:auto}
.nav{display:flex;align-items:center;gap:30px;flex:1}
.nav a{font-size:16px;color:var(--ll-text-color-2);position:relative;padding:6px 0;white-space:nowrap;transition:color .2s}
.nav a:hover{color:var(--ll-brand-color)}
.nav a.active{color:var(--ll-brand-color);font-weight:600}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--ll-brand-color);border-radius:2px}
.header-right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.btn-login{color:var(--ll-text-color-2);font-size:14px;padding:8px 16px}
.btn-login:hover{color:var(--ll-brand-color)}
.btn-register{background:var(--ll-brand-gradient);color:#fff;font-size:14px;padding:9px 22px;border-radius:22px;font-weight:600;transition:.2s;box-shadow:0 6px 16px rgba(90,58,255,.28)}
.btn-register:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(90,58,255,.36)}

/* ===================== News top section ===================== */
.news-index-wrapper{background:linear-gradient(180deg,#eceaff -13.58%,#fff 760px)}
.news-top-wrapper{padding:calc(var(--ll-top-padding) + 24px) 0 48px}
.top-layout{display:flex;gap:20px;align-items:stretch}

.news-top-banner{border-radius:12px;height:374px;width:787px;overflow:hidden;position:relative;flex-shrink:0;background:#eee6ff}
.banner-swiper{height:100%;position:relative}
.banner-track{display:flex;height:100%;transition:transform .5s ease}
.banner-slide{position:relative;min-width:100%;height:100%}
.banner-slide img{width:100%;height:100%;object-fit:cover}
.banner-slide a{display:block;height:100%;width:100%}
.banner-desc{position:absolute;left:0;right:0;bottom:0;z-index:10;background:linear-gradient(180deg,transparent,rgba(0,0,0,.72));display:flex;flex-direction:column;justify-content:flex-end;min-height:156px;padding:24px 28px;color:#fff;font-size:24px;line-height:40px;font-weight:600}
.banner-desc a{color:#fff;font-size:24px;line-height:40px;font-weight:600}
.banner-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:20;width:48px;height:48px;border-radius:60px;background:rgba(0,0,0,.32);color:#fff;display:flex;align-items:center;justify-content:center;opacity:.6;transition:.2s;font-size:22px}
.banner-nav:hover{opacity:1}
.banner-nav.prev{left:16px}
.banner-nav.next{right:16px}
.banner-dots{position:absolute;bottom:18px;right:28px;z-index:20;display:flex;gap:8px}
.banner-dots span{width:16px;height:3px;border-radius:1.5px;background:#fff;opacity:.48;cursor:pointer}
.banner-dots span.active{opacity:1;width:24px}

.news-top-side{background:#fff;border-radius:12px;height:374px;padding:22px 24px;width:340px;flex-shrink:0;display:flex;flex-direction:column;box-shadow:0 4px 24px rgba(27,31,33,.06)}
.news-top-side h3{font-size:22px;font-weight:700;line-height:30px;position:relative;padding-left:14px}
.news-top-side h3::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--ll-brand-gradient)}
.news-list{margin-top:16px;flex:1;overflow:hidden}
.news-list dl{height:100%}
.news-list dt{background:var(--ll-brand-gradient);color:#fff;border-radius:0;height:118px;margin-right:-24px;padding:18px 24px 0;position:relative;display:flex;flex-direction:column;justify-content:flex-start}
.news-list dt .rank{font-size:13px;opacity:.85}
.news-list dt .feat-title{color:#fff;font-size:16px;font-weight:600;line-height:24px;margin-top:8px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-list dt .feat-title:hover{text-decoration:underline}
.news-list dd{display:flex;align-items:flex-start;gap:12px;padding:13px 2px;border-bottom:1px solid var(--ll-border)}
.news-list dd:last-child{border-bottom:none}
.news-list dd .num{color:var(--ll-brand-color);font-weight:700;font-size:16px;width:18px;flex-shrink:0;font-style:italic}
.news-list dd .t{font-size:14px;color:var(--ll-text-color-2);line-height:22px;flex:1;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-list dd .t:hover{color:var(--ll-brand-color)}

/* ===================== Activity strip ===================== */
.activity-strip{margin:0 0 48px}
.activity-track{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.activity-card{background:#fff;border:1px solid var(--ll-border);border-radius:12px;overflow:hidden;transition:.2s}
.activity-card:hover{box-shadow:0 8px 24px rgba(90,58,255,.14);transform:translateY(-3px);border-color:transparent}
.activity-card .pic{height:98px;background:#f2f3f5;background-size:cover;background-position:center}
.activity-card .ttl{padding:12px 14px;font-size:14px;color:var(--ll-text-color-2);line-height:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:44px}
.activity-card:hover .ttl{color:var(--ll-brand-color)}

/* ===================== Section title ===================== */
.panel-title{margin-bottom:var(--ll-title-mb)}
.panel-title .head{display:flex;align-items:baseline;gap:14px}
.panel-title .head .title{font-size:28px;font-weight:700;color:var(--ll-text-color-1)}
.panel-title .head .sub{font-size:14px;color:var(--ll-text-color-3)}

/* ===================== Category tabs ===================== */
.cat-tabs{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.cat-tabs button{padding:8px 20px;border-radius:20px;font-size:15px;color:var(--ll-text-color-2);background:var(--ll-bg);transition:.2s;border:1px solid transparent}
.cat-tabs button:hover{color:var(--ll-brand-color)}
.cat-tabs button.active{background:var(--ll-brand-color);color:#fff}

/* ===================== Article list ===================== */
.news-list-content{display:flex;flex-direction:column}
.news-item{display:flex;gap:24px;padding:20px 0;position:relative;border-bottom:1px solid var(--ll-border)}
.news-item:first-child{padding-top:0}
.news-item .pic{flex-shrink:0;border-radius:10px;height:140px;width:250px;background:#f9f9fb;overflow:hidden}
.news-item .pic img{width:100%;height:100%;object-fit:cover}
.news-item .pic a{display:block;height:100%;width:100%}
.news-item__main{overflow:hidden;flex:1;display:flex;flex-direction:column}
.news-item__main a:hover>h4{color:var(--ll-brand-color)}
.news-item h4{color:var(--ll-text-color-1);font-size:22px;height:44px;line-height:44px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-item .desc{color:var(--ll-text-color-3);flex:1;font-size:14px;line-height:24px;max-height:48px;min-height:48px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;word-break:break-all}
.news-item .info{display:flex;flex-wrap:wrap;align-items:center;gap:8px;line-height:22px;margin-top:8px}
.news-item .info .tag{display:flex;flex-wrap:wrap;gap:8px;margin-right:24px}
.news-item .info .tag a,.news-item .info .tag span{background-color:#f1edff;border-radius:4px;color:var(--ll-brand-color);font-size:12px;padding:2px 10px;line-height:18px}
.news-item .info .tag a:hover{background:var(--ll-brand-color);color:#fff}
.news-item .info .date{color:var(--ll-text-color-3);font-size:13px;margin-left:auto}

/* ===================== Pagination ===================== */
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin:40px 0 64px}
.pagination button{min-width:38px;height:38px;padding:0 10px;border-radius:8px;font-size:14px;color:var(--ll-text-color-2);background:var(--ll-bg);transition:.2s}
.pagination button:hover:not(:disabled){color:var(--ll-brand-color)}
.pagination button.active{background:var(--ll-brand-color);color:#fff}
.pagination button:disabled{opacity:.4;cursor:not-allowed}

/* ===================== Footer ===================== */
.site-footer{background:#1b1f21;color:#c9cdd4;padding:52px 0 28px;margin-top:20px}
.footer-cols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:32px}
.footer-brand .f-logo{height:36px;margin-bottom:16px}
.footer-brand p{font-size:13px;line-height:22px;color:#86909c;max-width:280px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col a{display:block;font-size:13px;color:#86909c;line-height:30px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid #333;margin-top:36px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12px;color:#86909c}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}

/* ===================== HOME PAGE ===================== */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 120% at 80% 0%,#f0e9ff 0%,#fafafa 55%);padding:84px 0 72px}
.hero::before{content:"";position:absolute;right:-120px;top:-120px;width:480px;height:480px;background:var(--ll-brand-gradient);opacity:.12;border-radius:50%;filter:blur(10px)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;position:relative}
.hero-eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--ll-brand-color);background:#f1edff;padding:5px 14px;border-radius:20px;margin-bottom:20px}
.hero h1{font-size:48px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
.hero h1 .hl{background:var(--ll-brand-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:var(--ll-text-color-2);margin:22px 0 30px;max-width:520px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--ll-brand-gradient);color:#fff;font-size:16px;font-weight:600;padding:14px 32px;border-radius:28px;box-shadow:0 10px 26px rgba(90,58,255,.3);transition:.2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(90,58,255,.4)}
.btn-ghost{border:1px solid var(--ll-border);color:var(--ll-text-color-1);font-size:16px;font-weight:600;padding:14px 32px;border-radius:28px;transition:.2s;background:#fff}
.btn-ghost:hover{border-color:var(--ll-brand-color);color:var(--ll-brand-color)}

/* hero stats card */
.hero-stats{background:#fff;border-radius:18px;padding:34px 30px;box-shadow:0 18px 50px rgba(27,31,33,.10);border:1px solid var(--ll-border)}
.hero-stats .stat{display:flex;align-items:baseline;gap:10px;padding:16px 0;border-bottom:1px solid var(--ll-border)}
.hero-stats .stat:last-child{border-bottom:none}
.hero-stats .num{font-size:34px;font-weight:800;background:var(--ll-brand-gradient);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.hero-stats .num small{font-size:18px;margin-left:2px}
.hero-stats .label{font-size:14px;color:var(--ll-text-color-3)}

/* home generic section */
.section{padding:72px 0}
.section.alt{background:var(--ll-bg)}
.section-head{text-align:center;margin-bottom:48px}
.section-head .eyebrow{font-size:13px;font-weight:600;color:var(--ll-brand-color);letter-spacing:1px}
.section-head h2{font-size:34px;font-weight:800;margin-top:12px}
.section-head p{color:var(--ll-text-color-3);margin-top:12px;font-size:16px}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--ll-border);border-radius:16px;padding:30px 28px;transition:.2s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(90,58,255,.12);border-color:transparent}
.feature-card .ic{width:52px;height:52px;border-radius:14px;background:var(--ll-brand-gradient-soft);display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:700;margin-bottom:18px}
.feature-card h3{font-size:19px;margin-bottom:10px}
.feature-card p{color:var(--ll-text-color-3);font-size:14px;line-height:24px}

/* ===================== Responsive ===================== */
@media (max-width:980px){
  .top-layout{flex-direction:column}
  .news-top-banner{width:100%;height:300px}
  .news-top-side{width:100%;height:auto}
  .activity-track{grid-template-columns:repeat(3,1fr)}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:36px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .footer-cols{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--ll-top-padding:56px}
  .nav{display:none}
  .news-top-banner{height:220px}
  .banner-desc a{font-size:18px;line-height:28px}
  .activity-track{grid-template-columns:repeat(2,1fr)}
  .news-item{flex-direction:column;gap:14px}
  .news-item .pic{width:100%;height:180px}
  .news-item h4{font-size:18px;height:auto;line-height:26px;white-space:normal}
  .panel-title .head .title{font-size:22px}
  .hero h1{font-size:30px}
  .feature-grid{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
}