/* roulang page: index */
:root{
  --qk-a:#1657c8;
  --qk-b:#0b3f9e;
  --qk-hot:#ff7a45;
  --qk-bg:#f5f7fc;
  --qk-panel:#ffffff;
  --qk-ink:#101a2e;
  --qk-mut:#5a657c;
  --qk-line:#e3e8f2;
  --qk-rad:16px;
  --qk-shadow:0 10px 30px rgba(16,26,46,.08);
  --qk-gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;background:var(--qk-bg);color:var(--qk-ink);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button,input{font:inherit}
:focus-visible{outline:2px solid var(--qk-a);outline-offset:3px}
.bn-wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.bn-top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--qk-line)}
.bn-top-in{display:flex;align-items:center;gap:22px;min-height:68px}
.bn-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;flex:0 0 auto}
.bn-logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(140deg,var(--qk-a),var(--qk-b));color:#fff;display:grid;place-items:center;font-size:14px;letter-spacing:.5px;font-weight:800}
.bn-nav{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.bn-nav::-webkit-scrollbar{display:none}
.bn-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:10px;font-size:15px;color:var(--qk-mut);white-space:nowrap;transition:color .2s,background .2s}
.bn-nav a:hover{color:var(--qk-a);background:#eef3fd}
.bn-nav a.is-on{color:var(--qk-a);background:#eaf1fe;font-weight:600}

/* 首屏 */
.bn-hero{position:relative;overflow:hidden;color:#fff;background:#0a1a36}
.bn-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6}
.bn-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(8,19,40,.95) 0%,rgba(8,19,40,.8) 48%,rgba(8,19,40,.42) 100%)}
.bn-hero-in{position:relative;z-index:2;max-width:740px;padding:76px 0 60px}
.bn-hero-tag{display:inline-block;font-size:13px;letter-spacing:.08em;color:#ffd4c2;border:1px solid rgba(255,180,150,.5);border-radius:999px;padding:4px 14px;margin-bottom:20px}
.bn-hero h1{font-size:clamp(27px,4.4vw,44px);line-height:1.25;letter-spacing:-.5px;font-weight:800}
.bn-hero h1 em{font-style:normal;color:#ffb38c}
.bn-hero-sub{margin-top:16px;font-size:clamp(16px,1.6vw,19px);color:#e8eefb;font-weight:600}
.bn-hero-p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.78);max-width:640px}
.bn-hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.bn-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 28px;border-radius:999px;background:linear-gradient(135deg,var(--qk-a),var(--qk-b));color:#fff;font-weight:600;font-size:15px;border:0;box-shadow:0 10px 24px rgba(22,87,200,.34);transition:transform .2s,box-shadow .2s}
.bn-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(22,87,200,.44)}
.bn-btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.42);box-shadow:none}
.bn-btn-ghost:hover{background:rgba(255,255,255,.22);box-shadow:none}
.bn-ticker{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.bn-ticker-item{flex:1 1 150px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);border-radius:12px;padding:12px 16px}
.bn-ticker-item strong{display:block;font-size:15px;color:#fff}
.bn-ticker-item span{font-size:13px;color:rgba(255,255,255,.72)}

/* 板块通用 */
.bn-sec{padding:64px 0}
.bn-sec-alt{background:var(--qk-panel)}
.bn-head{max-width:760px;margin-bottom:34px}
.bn-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;max-width:none;margin-bottom:34px}
.bn-kicker{display:inline-block;font-size:13px;font-weight:600;color:var(--qk-a);background:#e9f0fe;padding:4px 12px;border-radius:999px;margin-bottom:12px}
.bn-head h2,.bn-head-row h2{font-size:clamp(22px,2.5vw,30px);line-height:1.35;letter-spacing:-.3px}
.bn-head p,.bn-head-row p{margin-top:12px;color:var(--qk-mut);font-size:15px}
.bn-head-row p{margin-top:0;max-width:470px;flex:0 1 470px}

/* 分类频道 */
.bn-cats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.bn-cat{background:var(--qk-panel);border:1px solid var(--qk-line);border-radius:var(--qk-rad);padding:22px;box-shadow:var(--qk-shadow);transition:border-color .2s,transform .2s}
.bn-cat:hover{border-color:#c3d6f7;transform:translateY(-2px)}
.bn-cat-name{font-size:17px;font-weight:700;margin-bottom:8px;border-left:4px solid var(--qk-a);padding-left:10px;line-height:1.4}
.bn-cat-desc{font-size:14px;color:var(--qk-mut)}

/* 卡片网格 */
.bn-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--qk-gap)}
.bn-card{background:var(--qk-panel);border:1px solid var(--qk-line);border-radius:var(--qk-rad);overflow:hidden;box-shadow:var(--qk-shadow);transition:transform .25s,box-shadow .25s}
.bn-card:hover{transform:translateY(-4px);box-shadow:0 18px 38px rgba(16,26,46,.14)}
.bn-thumb{position:relative;aspect-ratio:3/4;overflow:hidden;background:#dfe6f3}
.bn-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.bn-card:hover .bn-thumb img{transform:scale(1.05)}
.bn-badge{position:absolute;left:10px;top:10px;background:rgba(11,63,158,.9);color:#fff;font-size:12px;padding:3px 9px;border-radius:8px}
.bn-score{position:absolute;right:10px;bottom:10px;background:rgba(255,255,255,.95);color:#d9541f;font-weight:700;font-size:13px;padding:2px 8px;border-radius:8px}
.bn-card h3{font-size:16px;padding:14px 14px 0;line-height:1.45}
.bn-meta{font-size:13px;color:var(--qk-mut);padding:2px 14px 16px}

/* 榜单 */
.bn-rank{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 44px}
.bn-rank li{display:grid;grid-template-columns:44px minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:15px 0;border-bottom:1px dashed var(--qk-line)}
.bn-rank-no{font-size:16px;font-weight:800;color:#b9c6dd;font-variant-numeric:tabular-nums}
.bn-rank li:nth-child(-n+3) .bn-rank-no{color:var(--qk-hot)}
.bn-rank-name{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bn-rank-tag{font-size:12px;color:var(--qk-a);background:#eaf1fe;padding:3px 9px;border-radius:7px;white-space:nowrap}
.bn-rank-note{font-size:13px;color:var(--qk-mut);white-space:nowrap}

/* 保障承诺 */
.bn-safe{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.bn-safe-item{background:var(--qk-panel);border:1px solid var(--qk-line);border-top:3px solid var(--qk-a);border-radius:var(--qk-rad);padding:22px;box-shadow:var(--qk-shadow)}
.bn-safe-item h3{font-size:16px;margin-bottom:8px}
.bn-safe-item p{font-size:14px;color:var(--qk-mut)}

/* 高分点评 */
.bn-reviews{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.bn-review{display:flex;gap:16px;background:var(--qk-panel);border:1px solid var(--qk-line);border-radius:var(--qk-rad);padding:20px;box-shadow:var(--qk-shadow)}
.bn-review-score{flex:0 0 56px;height:56px;border-radius:14px;background:linear-gradient(140deg,#fff2ea,#ffe0ce);color:#d9541f;font-weight:800;font-size:18px;display:grid;place-items:center}
.bn-review h3{font-size:16px;margin-bottom:6px}
.bn-review p{font-size:14px;color:var(--qk-mut)}

/* 主题专题 */
.bn-topics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.bn-topic{background:linear-gradient(160deg,#102a56,#1b4b9c);color:#fff;border-radius:var(--qk-rad);padding:26px;box-shadow:0 16px 34px rgba(16,42,86,.26)}
.bn-topic h3{font-size:18px;margin-bottom:10px}
.bn-topic p{font-size:14px;color:rgba(255,255,255,.8)}
.bn-topic-mark{display:inline-block;margin-top:16px;font-size:13px;color:#ffd9c7;border:1px solid rgba(255,255,255,.3);padding:3px 12px;border-radius:999px}

/* 资讯 */
.bn-news{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.bn-news-item{display:flex;gap:16px;background:var(--qk-panel);border:1px solid var(--qk-line);border-radius:var(--qk-rad);padding:14px;box-shadow:var(--qk-shadow);transition:transform .2s}
.bn-news-item:hover{transform:translateY(-2px)}
.bn-news-thumb{flex:0 0 116px;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:#dfe6f3}
.bn-news-thumb img{width:100%;height:100%;object-fit:cover}
.bn-news-body h3{font-size:15px;line-height:1.5}
.bn-news-meta{margin-top:8px;font-size:13px;color:var(--qk-mut)}

/* 问答 */
.bn-faq{max-width:880px;display:grid;gap:12px}
.bn-faq details{background:var(--qk-panel);border:1px solid var(--qk-line);border-radius:14px;padding:0 20px;box-shadow:var(--qk-shadow)}
.bn-faq summary{cursor:pointer;list-style:none;min-height:56px;display:flex;align-items:center;font-size:16px;font-weight:600;position:relative;padding-right:26px}
.bn-faq summary::-webkit-details-marker{display:none}
.bn-faq summary::after{content:"+";position:absolute;right:0;color:var(--qk-a);font-size:20px;line-height:1}
.bn-faq details[open] summary::after{content:"–"}
.bn-faq p{font-size:14px;color:var(--qk-mut);border-top:1px solid var(--qk-line);padding:14px 0 18px}

/* 收口 */
.bn-cta{background:linear-gradient(120deg,#0d2447,#1a4b9e);color:#fff;border-radius:22px;padding:48px 40px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;box-shadow:0 20px 44px rgba(13,36,71,.28)}
.bn-cta h2{font-size:clamp(20px,2.4vw,28px);line-height:1.35}
.bn-cta p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.8);max-width:580px}

/* 页脚 */
.bn-foot{background:#0b1a33;color:rgba(255,255,255,.72);padding-top:56px;margin-top:64px}
.bn-foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px}
.bn-foot-brand{font-size:18px;color:#fff;font-weight:700;margin-bottom:12px}
.bn-foot h3{color:#fff;font-size:15px;margin-bottom:14px}
.bn-foot p{font-size:14px}
.bn-foot li{font-size:14px;margin-bottom:10px}
.bn-foot a{transition:color .2s}
.bn-foot a:hover{color:#fff}
.bn-copy{border-top:1px solid rgba(255,255,255,.14);padding:18px 0;font-size:13px;color:rgba(255,255,255,.55);text-align:center}

@media (max-width:1024px){
  .bn-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .bn-cats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bn-safe{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bn-topics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bn-foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bn-head-row{flex-direction:column;align-items:flex-start;gap:6px}
  .bn-head-row p{flex:none;max-width:640px}
}
@media (max-width:768px){
  .bn-top-in{flex-wrap:wrap;gap:8px;padding:10px 0}
  .bn-nav{margin-left:0;width:100%;order:3;border-top:1px solid var(--qk-line);padding-top:4px}
  .bn-hero-in{padding:56px 0 46px}
  .bn-sec{padding:48px 0}
  .bn-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .bn-rank{grid-template-columns:1fr;gap:0}
  .bn-reviews,.bn-news{grid-template-columns:1fr}
  .bn-topics{grid-template-columns:1fr}
  .bn-cta{padding:36px 26px}
}
@media (max-width:520px){
  body{font-size:15px}
  .bn-logo{font-size:16px}
  .bn-grid{gap:14px}
  .bn-card h3{font-size:15px;padding:12px 12px 0}
  .bn-meta{font-size:13px;padding:2px 12px 14px}
  .bn-cats,.bn-safe,.bn-foot-grid{grid-template-columns:1fr}
  .bn-rank li{grid-template-columns:36px minmax(0,1fr) auto;gap:8px}
  .bn-rank-note{display:none}
  .bn-news-thumb{flex-basis:96px}
  .bn-hero-btns .bn-btn{width:100%}
  .bn-ticker-item{flex:1 1 100%}
  .bn-cta{padding:30px 22px;border-radius:18px}
}