/* roulang page: index */
:root{
  --c-bg:#0a0d12;
  --c-wash:#10151d;
  --c-card:#151c26;
  --c-card2:#1b2430;
  --c-ink:#eef3f8;
  --c-ink2:#93a1b4;
  --c-brand:#31d8b4;
  --c-warm:#ff7a59;
  --c-line:rgba(255,255,255,.08);
  --r-l:20px;
  --r-m:14px;
  --r-s:8px;
  --sh-1:0 12px 28px rgba(0,0,0,.32);
  --sh-2:0 20px 50px rgba(0,0,0,.5);
  --gap:22px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;border:0;cursor:pointer}
input{font:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-brand);outline-offset:3px}

.fbscibz-wrap{width:min(1180px,92vw);margin:0 auto}

/* 顶栏 */
.fbscibz-top{
  position:sticky;top:0;z-index:60;
  background:rgba(9,12,17,.86);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--c-line);
}
.fbscibz-top-in{display:flex;align-items:center;gap:20px;min-height:68px}
.fbscibz-brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.fbscibz-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-brand),#1a8d78);
  color:#05231d;font-weight:800;font-size:16px;
  display:grid;place-items:center;
}
.fbscibz-brand b{font-size:19px;letter-spacing:.6px;font-weight:700}
.fbscibz-nav{
  display:flex;gap:4px;margin-left:auto;
  overflow-x:auto;padding:4px 0;scrollbar-width:none;
}
.fbscibz-nav::-webkit-scrollbar{display:none}
.fbscibz-nav a{
  display:inline-flex;align-items:center;min-height:44px;
  padding:0 14px;border-radius:999px;
  font-size:15px;color:var(--c-ink2);white-space:nowrap;
  transition:color .2s,background .2s;
}
.fbscibz-nav a:hover{color:var(--c-ink);background:rgba(255,255,255,.07)}

/* 首屏 */
.fbscibz-hero{position:relative;overflow:hidden;background:#06090d;border-bottom:1px solid var(--c-line)}
.fbscibz-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.fbscibz-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(6,9,13,.95) 0%,rgba(6,9,13,.84) 42%,rgba(6,9,13,.42) 78%,rgba(6,9,13,.7) 100%);
}
.fbscibz-hero-in{position:relative;z-index:2;padding:88px 0 80px}
.fbscibz-hero-copy{max-width:680px}
.fbscibz-eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;
  letter-spacing:2px;color:var(--c-brand);margin-bottom:10px;
}
.fbscibz-hero h1{
  font-size:clamp(30px,4.8vw,54px);line-height:1.2;
  font-weight:800;letter-spacing:-.8px;margin-top:6px;
}
.fbscibz-hero h1 span{color:var(--c-brand)}
.fbscibz-hero-lede{margin-top:20px;color:#c3cede;font-size:16px;line-height:1.9;max-width:60ch}
.fbscibz-hero-act{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.fbscibz-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 26px;border-radius:999px;
  font-size:15.5px;font-weight:600;
  transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;
}
.fbscibz-btn-main{background:var(--c-brand);color:#04231d;box-shadow:0 10px 26px rgba(49,216,180,.24)}
.fbscibz-btn-main:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(49,216,180,.32)}
.fbscibz-btn-ghost{border:1px solid rgba(255,255,255,.22);color:var(--c-ink)}
.fbscibz-btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.36)}

/* 板块通用 */
.fbscibz-sec{padding:70px 0;scroll-margin-top:86px}
.fbscibz-sec--tint{background:var(--c-wash);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.fbscibz-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap;margin-bottom:30px}
.fbscibz-head h2{font-size:clamp(21px,2.6vw,30px);line-height:1.3;letter-spacing:-.3px}
.fbscibz-head-note{max-width:48ch;color:var(--c-ink2);font-size:14.5px;line-height:1.8}

/* 卡片墙 */
.fbscibz-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}
.fbscibz-card{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-m);overflow:hidden;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.fbscibz-card:hover{transform:translateY(-5px);box-shadow:var(--sh-2);border-color:rgba(49,216,180,.35)}
.fbscibz-poster{position:relative;aspect-ratio:2/3;background:var(--c-card2);overflow:hidden}
.fbscibz-poster img{width:100%;height:100%;object-fit:cover}
.fbscibz-score{
  position:absolute;right:9px;bottom:9px;
  background:rgba(6,9,13,.84);color:var(--c-brand);
  font-size:13px;font-weight:700;padding:3px 9px;border-radius:8px;
}
.fbscibz-card-b{padding:13px 14px 16px}
.fbscibz-card-b h3{
  font-size:15.5px;font-weight:600;line-height:1.4;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.fbscibz-card-b p{margin-top:5px;font-size:13px;color:var(--c-ink2)}

/* 左文右列表 */
.fbscibz-split{display:grid;grid-template-columns:320px 1fr;gap:48px;align-items:start}
.fbscibz-split-side h2{font-size:clamp(21px,2.6vw,30px);line-height:1.3}
.fbscibz-split-side p{margin-top:14px;color:var(--c-ink2);font-size:14.5px;line-height:1.85}

/* 题材频道 */
.fbscibz-tags{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.fbscibz-tags li{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-m);padding:18px 18px 20px;
  transition:border-color .25s,transform .25s;
}
.fbscibz-tags li:hover{border-color:rgba(49,216,180,.4);transform:translateY(-3px)}
.fbscibz-tags b{display:block;font-size:16.5px;font-weight:600;margin-bottom:8px}
.fbscibz-tags span{display:block;font-size:13.5px;color:var(--c-ink2);line-height:1.7}

/* 排行榜 */
.fbscibz-rank{display:grid;gap:8px}
.fbscibz-rank li{
  display:flex;align-items:center;gap:16px;
  padding:13px 16px;border-radius:var(--r-s);
  background:var(--c-card);border:1px solid transparent;
  transition:background .2s,border-color .2s;
}
.fbscibz-rank li:hover{border-color:rgba(49,216,180,.35)}
.fbscibz-rank-no{
  flex:none;width:30px;font-size:15px;font-weight:700;
  color:var(--c-ink2);font-variant-numeric:tabular-nums;
}
.fbscibz-rank li:nth-child(-n+3) .fbscibz-rank-no{color:var(--c-brand)}
.fbscibz-rank-b{flex:1;min-width:0}
.fbscibz-rank-b b{
  display:block;font-size:15.5px;font-weight:600;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.fbscibz-rank-b span{font-size:12.5px;color:var(--c-ink2)}
.fbscibz-rank-tag{
  flex:none;font-size:12.5px;color:var(--c-brand);
  background:rgba(49,216,180,.1);border:1px solid rgba(49,216,180,.24);
  padding:3px 10px;border-radius:999px;white-space:nowrap;
}

/* 高分横卡 */
.fbscibz-wide{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap)}
.fbscibz-wide li{
  display:flex;gap:16px;padding:14px;
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-m);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.fbscibz-wide li:hover{transform:translateY(-4px);box-shadow:var(--sh-1);border-color:rgba(49,216,180,.3)}
.fbscibz-wide .fbscibz-poster{width:104px;flex:none;border-radius:var(--r-s)}
.fbscibz-wide-txt{align-self:center;min-width:0}
.fbscibz-wide-txt h3{font-size:16px;font-weight:600}
.fbscibz-wide-txt .fbscibz-num{display:inline-block;margin-top:5px;font-size:13px;font-weight:700;color:var(--c-warm)}
.fbscibz-wide-txt p{margin-top:6px;font-size:13.5px;color:var(--c-ink2);line-height:1.7}

/* 长条列表 */
.fbscibz-rows{display:grid;border-top:1px solid var(--c-line)}
.fbscibz-rows li{
  display:flex;gap:20px;align-items:baseline;
  padding:20px 4px;border-bottom:1px solid var(--c-line);
  transition:background .2s;
}
.fbscibz-rows li:hover{background:rgba(255,255,255,.03)}
.fbscibz-rows-i{
  flex:none;width:34px;font-size:14px;font-weight:700;
  color:var(--c-brand);font-variant-numeric:tabular-nums;
}
.fbscibz-rows h3{font-size:16.5px;font-weight:600}
.fbscibz-rows p{margin-top:4px;font-size:14px;color:var(--c-ink2)}

/* 主题片单 */
.fbscibz-plist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.fbscibz-plist li{
  position:relative;overflow:hidden;
  padding:26px 24px 28px;border-radius:var(--r-l);
  border:1px solid var(--c-line);
  background:linear-gradient(165deg,rgba(49,216,180,.1),rgba(255,255,255,.02) 46%);
  transition:transform .25s,border-color .25s;
}
.fbscibz-plist li:hover{transform:translateY(-4px);border-color:rgba(49,216,180,.4)}
.fbscibz-plist i{
  position:absolute;right:16px;top:2px;
  font-size:56px;font-weight:800;font-style:normal;
  color:rgba(255,255,255,.05);line-height:1;
}
.fbscibz-plist h3{position:relative;font-size:18px;font-weight:600;margin-bottom:10px}
.fbscibz-plist p{position:relative;font-size:14px;color:var(--c-ink2);line-height:1.8}

/* 资讯 */
.fbscibz-news{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.fbscibz-news li{
  display:flex;gap:16px;padding:12px;
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-m);
  transition:border-color .2s,transform .2s;
}
.fbscibz-news li:hover{border-color:rgba(49,216,180,.35);transform:translateY(-3px)}
.fbscibz-thumb{
  flex:none;width:132px;aspect-ratio:16/10;
  border-radius:var(--r-s);overflow:hidden;background:var(--c-card2);
}
.fbscibz-thumb img{width:100%;height:100%;object-fit:cover}
.fbscibz-news-txt{min-width:0;align-self:center}
.fbscibz-news-txt h3{font-size:15px;font-weight:600;line-height:1.55}
.fbscibz-news-txt span{display:inline-block;margin-top:8px;font-size:12.5px;color:var(--c-brand)}

/* 问答 */
.fbscibz-faq{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.fbscibz-faq li{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-m);padding:22px 22px 24px;
}
.fbscibz-faq h3{font-size:15.5px;font-weight:600;margin-bottom:9px}
.fbscibz-faq p{font-size:14px;color:var(--c-ink2);line-height:1.85}

/* 提醒区 */
.fbscibz-cta{text-align:center}
.fbscibz-cta h2{font-size:clamp(21px,2.6vw,30px);line-height:1.3}
.fbscibz-cta p{margin:14px auto 0;max-width:52ch;color:var(--c-ink2);font-size:14.5px;line-height:1.85}
.fbscibz-sub{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:26px}
.fbscibz-input{
  width:min(360px,82vw);min-height:50px;padding:0 20px;
  border-radius:999px;color:var(--c-ink);
  background:rgba(255,255,255,.06);border:1px solid var(--c-line);
}
.fbscibz-input::placeholder{color:#7b8a9d}

/* 页脚 */
.fbscibz-foot{background:#070a0e;border-top:1px solid var(--c-line);padding-top:56px}
.fbscibz-foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.fbscibz-foot h4{font-size:14px;font-weight:600;letter-spacing:.5px;margin-bottom:14px}
.fbscibz-foot p,.fbscibz-foot li{font-size:13.5px;color:#8394a8;line-height:1.9}
.fbscibz-foot ul{display:grid;gap:6px}
.fbscibz-foot a:hover{color:var(--c-brand)}
.fbscibz-copy{
  margin-top:44px;padding:20px 0 26px;
  border-top:1px solid var(--c-line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#6f7f93;
}

/* 断点 */
@media (max-width:1024px){
  .fbscibz-cards{grid-template-columns:repeat(3,minmax(0,1fr))}
  .fbscibz-split{grid-template-columns:1fr;gap:28px}
  .fbscibz-tags{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fbscibz-foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .fbscibz-top-in{flex-wrap:wrap;gap:0;padding:8px 0 0}
  .fbscibz-nav{width:100%;margin-left:0;order:2;border-top:1px solid var(--c-line);padding:2px 0}
  .fbscibz-nav a{min-height:44px;padding:0 12px;font-size:14.5px}
  .fbscibz-sec{padding:52px 0}
  .fbscibz-hero-in{padding:62px 0 58px}
  .fbscibz-hero-lede{font-size:15px}
  .fbscibz-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .fbscibz-wide{grid-template-columns:1fr}
  .fbscibz-plist{grid-template-columns:1fr}
  .fbscibz-news{grid-template-columns:1fr}
  .fbscibz-faq{grid-template-columns:1fr}
  .fbscibz-card-b p,.fbscibz-tags span,.fbscibz-foot p,.fbscibz-foot li,
  .fbscibz-wide-txt p,.fbscibz-news-txt h3{font-size:13.8px}
  .fbscibz-foot{padding-top:44px}
}
@media (max-width:520px){
  .fbscibz-tags{grid-template-columns:1fr}
  .fbscibz-foot-grid{grid-template-columns:1fr;gap:26px}
  .fbscibz-hero h1{font-size:28px}
  .fbscibz-hero-act{flex-direction:column}
  .fbscibz-btn{width:100%}
  .fbscibz-thumb{width:104px}
  .fbscibz-wide .fbscibz-poster{width:88px}
  .fbscibz-rank li{padding:12px 14px;gap:12px}
  .fbscibz-rank-tag{display:none}
}