:root{
  --bg:#0a0a0a;
  --fg:#e8eef6;
  --muted:#93a1b3;
  --line:#2b3542;
  --accent:#cbd5e1;
  --accent-2:#22d3ee;
  --gap:56px;
  --radius:6px;
  --shadow:0 0 26px rgba(203,213,225,.22);
  --font:"Segoe UI","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--fg);
  background:linear-gradient(180deg,#0a0a0a 0%,#101822 45%,#0a0a0a 100%);
  background-attachment:fixed;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
h1,h2,h3{margin:0;font-weight:700;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px}
::selection{background:rgba(34,211,238,.35);color:#ffffff}
.streamkaiyun-header{
  background:linear-gradient(180deg,#05070a,#0d1420);
  border-bottom:1px solid var(--line);
  position:sticky;
  top:0;
  z-index:30;
}
.streamkaiyun-nav{
  max-width:1080px;
  margin:0 auto;
  padding:14px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.streamkaiyun-brand{
  font-size:21px;
  font-weight:700;
  letter-spacing:.08em;
  color:#ffffff;
  white-space:nowrap;
}
.streamkaiyun-brand span{color:var(--accent-2)}
.nav-links{display:flex;flex-wrap:wrap;gap:18px;font-size:17px}
.nav-links a{
  color:#ffffff;
  padding-bottom:4px;
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.nav-links a:hover{color:var(--accent-2);border-bottom-color:var(--accent-2)}
.streamkaiyun-main{max-width:1080px;margin:0 auto;padding:0 20px 72px}
.streamkaiyun-hero{
  padding:62px 0 42px;
  text-align:center;
  border-bottom:1px solid var(--line);
}
.streamkaiyun-hero h1{
  font-size:44px;
  margin-bottom:22px;
  background:linear-gradient(120deg,#ffffff,#cbd5e1 55%,#7f8ea3);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.streamkaiyun-hero-sub{max-width:720px;margin:0 auto;color:var(--muted)}
.streamkaiyun-hero-sub p{margin-bottom:14px}
.streamkaiyun-hero-sub p:last-child{margin-bottom:0}
.streamkaiyun-rule{
  width:120px;
  height:2px;
  margin:28px auto 0;
  background:linear-gradient(90deg,transparent,var(--accent-2),transparent);
}
.streamkaiyun-block{padding:var(--gap) 0;border-bottom:1px solid var(--line)}
.streamkaiyun-block:last-child{border-bottom:none}
.streamkaiyun-block-head{text-align:center;margin-bottom:34px}
.streamkaiyun-block-title{font-size:28px;color:#ffffff}
.streamkaiyun-block-desc{color:var(--muted);max-width:700px;margin:12px auto 0}
.streamkaiyun-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.streamkaiyun-stat{
  padding:22px 18px;
  text-align:center;
  border:2px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,#141c26,#0b1017);
  box-shadow:var(--shadow);
  clip-path:polygon(16px 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%,0 16px);
  transition:transform .25s ease,border-color .25s ease;
}
.streamkaiyun-stat b{display:block;font-size:28px;color:var(--accent-2);letter-spacing:.02em}
.streamkaiyun-stat span{display:block;color:var(--muted);margin-top:6px}
.streamkaiyun-stat:hover{transform:translateY(-4px);border-color:var(--accent)}
.streamkaiyun-rows{display:grid;gap:26px}
.streamkaiyun-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  border:2px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,#121a24,#0a0f16);
  box-shadow:var(--shadow);
  overflow:hidden;
  clip-path:polygon(20px 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%,0 20px);
  transition:transform .25s ease,border-color .25s ease;
}
.streamkaiyun-row:hover{transform:translateY(-4px);border-color:var(--accent)}
.streamkaiyun-row-media{min-height:230px;background:#0b1017;border-right:1px solid var(--line)}
.streamkaiyun-row-media img{width:100%;height:100%;object-fit:cover;border-radius:4px}
.streamkaiyun-row-body{padding:24px 26px}
.streamkaiyun-row-body h3{font-size:21px;color:#ffffff;margin-bottom:10px}
.streamkaiyun-row-body p{color:var(--muted)}
.streamkaiyun-row:nth-child(even) .streamkaiyun-row-media{order:2;border-right:none;border-left:1px solid var(--line)}
.streamkaiyun-row:nth-child(even) .streamkaiyun-row-body{order:1}
.streamkaiyun-badge{
  display:inline-block;
  padding:2px 10px;
  margin-bottom:12px;
  border:1px solid var(--accent-2);
  border-radius:var(--radius);
  color:var(--accent-2);
  font-size:15px;
  letter-spacing:.06em;
}
.streamkaiyun-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.streamkaiyun-card{
  padding:24px;
  border:2px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(203,213,225,.10),rgba(10,15,22,.92) 50%);
  box-shadow:var(--shadow);
  clip-path:polygon(18px 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%,0 18px);
  transition:transform .25s ease,border-color .25s ease;
}
.streamkaiyun-card:hover{transform:translateY(-5px);border-color:var(--accent)}
.streamkaiyun-card h3{font-size:21px;color:#ffffff;margin-bottom:10px}
.streamkaiyun-card p{color:var(--muted)}
.streamkaiyun-card:first-child{border-color:rgba(34,211,238,.5)}
.streamkaiyun-card:nth-child(even){background:linear-gradient(150deg,rgba(203,213,225,.05),rgba(10,15,22,.94) 55%)}
.streamkaiyun-prose p{color:var(--muted);margin-bottom:14px}
.streamkaiyun-prose p:last-child{margin-bottom:0}
.streamkaiyun-timeline{position:relative;padding-left:34px}
.streamkaiyun-timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:6px;
  bottom:6px;
  width:2px;
  background:linear-gradient(180deg,var(--accent-2),rgba(203,213,225,.14));
}
.streamkaiyun-news{position:relative;padding-bottom:30px}
.streamkaiyun-news::before{
  content:"";
  position:absolute;
  left:-30px;
  top:10px;
  width:12px;
  height:12px;
  border-radius:50%;
  background:#0a0f16;
  border:2px solid var(--accent-2);
  box-shadow:0 0 12px rgba(34,211,238,.6);
}
.streamkaiyun-news:last-child{padding-bottom:0}
.streamkaiyun-news-date{display:inline-block;color:var(--accent-2);letter-spacing:.04em;font-size:15px}
.streamkaiyun-news-title{font-size:21px;color:#ffffff;margin:6px 0 8px;transition:color .2s ease}
.streamkaiyun-news:hover .streamkaiyun-news-title{color:var(--accent-2)}
.streamkaiyun-news-text{color:var(--muted)}
.streamkaiyun-faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.streamkaiyun-faq-item{
  border:2px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,#121a24,#0a0f16);
  box-shadow:var(--shadow);
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  transition:border-color .2s ease;
}
.streamkaiyun-faq-item summary{
  display:block;
  padding:18px 22px;
  cursor:pointer;
  list-style:none;
  color:#ffffff;
  font-weight:600;
}
.streamkaiyun-faq-item summary::-webkit-details-marker{display:none}
.streamkaiyun-faq-item summary::after{content:"+";float:right;color:var(--accent-2);font-weight:700}
.streamkaiyun-faq-item[open] summary::after{content:"–"}
.streamkaiyun-faq-item[open] summary{color:var(--accent-2)}
.streamkaiyun-faq-item[open]{border-color:var(--accent)}
.streamkaiyun-faq-item:hover{border-color:var(--accent)}
.streamkaiyun-faq-a{padding:0 22px 20px;color:var(--muted)}
.streamkaiyun-btn{
  display:inline-block;
  padding:12px 26px;
  border:2px solid var(--accent);
  border-radius:var(--radius);
  color:#0a0a0a;
  font-weight:700;
  background:linear-gradient(180deg,#ffffff,#cbd5e1);
  box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease;
}
.streamkaiyun-btn:hover{transform:translateY(-2px);box-shadow:0 0 30px rgba(34,211,238,.45)}
.streamkaiyun-btn:active{transform:translateY(1px)}
.streamkaiyun-cta{text-align:center}
.streamkaiyun-cta p{color:var(--muted);max-width:700px;margin:0 auto 22px}
.streamkaiyun-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#080b10,#04060a);
  padding:40px 0 26px;
  color:var(--muted);
  font-size:16px;
}
.streamkaiyun-footer-inner{max-width:1080px;margin:0 auto;padding:0 20px}
.streamkaiyun-footer p{margin-bottom:8px}
.streamkaiyun-footer a{color:var(--accent);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.streamkaiyun-footer a:hover{color:var(--accent-2);border-bottom-color:var(--accent-2)}
.streamkaiyun-footer-bottom{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
@media (max-width:1024px){
  .streamkaiyun-nav{flex-direction:column;align-items:flex-start;gap:12px}
  .streamkaiyun-hero h1{font-size:38px}
  .streamkaiyun-hero{padding:48px 0 34px}
  .streamkaiyun-stats-grid{grid-template-columns:repeat(2,1fr)}
  .streamkaiyun-faq-grid{grid-template-columns:1fr}
  .streamkaiyun-block-title{font-size:24px}
}
@media (max-width:720px){
  body{font-size:16px}
  .streamkaiyun-hero h1{font-size:28px}
  .streamkaiyun-hero{padding:40px 0 28px}
  .streamkaiyun-block{padding:40px 0}
  .streamkaiyun-block-title{font-size:22px}
  .streamkaiyun-row{grid-template-columns:1fr}
  .streamkaiyun-row-media{min-height:190px;border-right:none;border-bottom:1px solid var(--line)}
  .streamkaiyun-row:nth-child(even) .streamkaiyun-row-media{order:0;border-left:none;border-bottom:1px solid var(--line)}
  .streamkaiyun-grid-2{grid-template-columns:1fr}
  .streamkaiyun-stats-grid{grid-template-columns:1fr 1fr}
  .streamkaiyun-news-title{font-size:19px}
  .streamkaiyun-timeline{padding-left:26px}
  .streamkaiyun-news::before{left:-23px}
  .nav-links{gap:12px;font-size:15px}
  .streamkaiyun-footer-bottom{flex-direction:column;gap:6px}
}