/* roulang page: index */
:root{
  --brand:#1657D8;
  --brand-deep:#0E3E9E;
  --brand-soft:#E8F0FE;
  --teal:#17B8A6;
  --amber:#FF8A2B;
  --bg:#F5F8FC;
  --bg-2:#EEF3FA;
  --card:#FFFFFF;
  --line:#DFE7F2;
  --ink:#16233A;
  --ink-2:#4E5F7A;
  --ink-3:#8496B0;
  --footer:#0B1F44;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --pill:999px;
  --sh-1:0 1px 2px rgba(16,42,84,.06), 0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 6px rgba(16,42,84,.08), 0 18px 40px -18px rgba(16,42,84,.26);
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;background-color:transparent;transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out}
a:hover{color:var(--brand-deep)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0;line-height:1.28}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
:focus-visible{outline:3px solid rgba(22,87,216,.32);outline-offset:2px;border-radius:6px}
.num,.tabular{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* 覆盖 Foundation 默认 */
.grid-container{max-width:1240px;width:100%;margin:0 auto;padding-left:24px;padding-right:24px}
.label{display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand);border-radius:var(--pill);font-size:12px;font-weight:600;padding:4px 11px;line-height:1.5;font-style:normal}
.callout{margin:0;padding:0;border:0;background:transparent}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--pill);font-size:15px;font-weight:600;background:var(--brand);color:#fff;border:1px solid transparent;transition:all .18s ease-out;box-shadow:none;margin:0}
.button:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.orbit{margin:0}

/* 通用板块 */
.section{padding:var(--sec) 0}
.section-alt{background:var(--bg-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-title{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.25}
.section-desc{margin-top:12px;color:var(--ink-2);font-size:15px;max-width:660px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:6px 14px;border-radius:var(--pill);margin-bottom:18px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--pill);font-size:15px;font-weight:600;border:1px solid transparent;transition:all .18s ease-out;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px -12px rgba(22,87,216,.85)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(22,87,216,.38)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-lg{height:56px;padding:0 34px;font-size:17px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;border-bottom:1px solid rgba(22,87,216,.35);padding-bottom:2px}
.link-more:hover{border-color:var(--brand-deep)}

/* 头部 */
.site-header{position:sticky;top:0;z-index:80;background:#fff;transition:box-shadow .2s ease-out}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:28px;height:28px;color:var(--brand);flex-shrink:0}
.brand-name{font-size:18px;font-weight:700;color:var(--ink);line-height:1.2;white-space:nowrap}
.brand-name:hover{color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.main-nav a{display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:var(--r-s);font-size:15px;color:var(--ink-2);font-weight:500}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.main-nav a.active{color:var(--brand);background:var(--brand-soft);font-weight:600}
.brand-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{width:40px;height:40px;border-radius:var(--pill);display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);border:1px solid var(--line);background:#fff;transition:all .18s ease-out}
.icon-btn:hover{color:var(--brand);border-color:rgba(22,87,216,.35);background:var(--brand-soft)}
.menu-toggle{display:none;width:44px;height:40px;border-radius:var(--r-s);border:1px solid var(--line);color:var(--ink);align-items:center;justify-content:center}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}

.channel-bar{background:var(--bg-2);border-bottom:1px solid var(--line)}
.channel-inner{display:flex;align-items:center;gap:6px;height:50px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel{position:relative;display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-s);font-size:14px;color:var(--ink-2);font-weight:500}
.channel:hover{background:var(--brand-soft);color:var(--brand)}
.channel.active{color:var(--brand);font-weight:600;background:var(--brand-soft)}
.channel.active::after{content:"";position:absolute;left:14px;right:14px;bottom:-8px;height:3px;border-radius:2px;background:var(--brand)}

.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:12px 0 20px}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:flex;align-items:center;justify-content:space-between;padding:13px 0;font-size:15px;color:var(--ink-2);border-bottom:1px solid var(--line)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.active{color:var(--brand);font-weight:600}
.mobile-drawer a i{color:var(--ink-3);font-size:12px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:72px 0 84px;background:linear-gradient(180deg,#F7FAFF 0%,#EEF3FA 100%)}
.hero::before{content:"";position:absolute;top:-140px;right:-120px;width:520px;height:520px;border-radius:50%;border:1px solid rgba(22,87,216,.06);box-shadow:0 0 0 70px rgba(22,87,216,.035),0 0 0 150px rgba(22,87,216,.022);pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-title{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;color:var(--ink)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.9;color:var(--ink-2);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-bar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.trust-item{min-width:0}
.trust-label{display:block;font-size:12.5px;color:var(--ink-3);margin-bottom:4px}
.trust-value{display:block;font-size:16px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hero-media{position:relative}
.hero-media-frame{position:relative;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line);background:#fff}
.hero-media-frame img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media-frame::after{content:"";position:absolute;left:0;right:0;bottom:0;height:38%;background:linear-gradient(180deg,rgba(22,87,216,0) 0%,rgba(22,87,216,.06) 100%);pointer-events:none}
.float-card{position:absolute;left:-14px;bottom:-18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-1);padding:14px 18px;display:flex;align-items:center;gap:14px;max-width:calc(100% - 12px)}
.float-card .fc-main{font-size:14px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.float-card .fc-sub{font-size:12.5px;color:var(--ink-3)}
.platform-chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:var(--pill);padding:3px 10px}

/* 价值区 非对称 */
.value-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:start}
.value-figure{border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--sh-1)}
.value-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.value-lead{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:26px;box-shadow:var(--sh-1);display:flex;gap:18px;align-items:flex-start}
.value-lead .vi{width:46px;height:46px;flex-shrink:0;border-radius:var(--r-m);background:var(--brand-soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:19px}
.value-lead h3{font-size:20px;font-weight:600;margin-bottom:8px}
.value-lead p{margin:0;color:var(--ink-2);font-size:15px}
.value-list{margin-top:18px;display:grid;gap:12px}
.value-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:18px 20px;display:flex;gap:14px;transition:all .2s ease-out}
.value-item:hover{border-color:rgba(22,87,216,.28);box-shadow:var(--sh-1);transform:translateY(-2px)}
.value-item .vi{width:38px;height:38px;flex-shrink:0;border-radius:var(--r-s);background:var(--bg-2);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:15px}
.value-item h4{font-size:16px;font-weight:600;margin-bottom:4px}
.value-item p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.75}

/* 轮播 */
.shot-viewport{overflow:hidden;padding:16px 0 8px;margin:0 -8px}
.shot-track{display:flex;gap:24px;transition:transform .45s cubic-bezier(.4,0,.2,1);will-change:transform}
.shot{flex:0 0 calc((100% - 48px)/3);background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:14px;box-shadow:var(--sh-1);transition:transform .28s ease-out,box-shadow .28s ease-out,border-color .28s ease-out}
.shot img{border-radius:var(--r-m);width:100%;aspect-ratio:16/10;object-fit:cover}
.shot h3{font-size:16px;font-weight:600;margin:16px 4px 6px}
.shot p{margin:0 4px 6px;font-size:13.5px;color:var(--ink-2);line-height:1.75}
.shot.is-center{transform:scale(1.06);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.3)}
.shot-nav{display:flex;align-items:center;justify-content:center;gap:20px;margin-top:32px}
.shot-arrow{width:40px;height:40px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;transition:all .18s ease-out}
.shot-arrow:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.shot-dots{display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:var(--pill);background:#C6D4E8;transition:all .2s ease-out;padding:0}
.dot:hover{background:#9FB6D6}
.dot.active{width:22px;background:var(--brand)}

/* 系统要求 */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:8px 24px 20px;box-shadow:var(--sh-1)}
.spec-card-title{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;padding:20px 0 14px;border-bottom:1px solid var(--line);margin-bottom:6px}
.spec-card-title i{color:var(--brand)}
.spec-row{display:grid;grid-template-columns:130px 1fr;gap:16px;align-items:center;min-height:44px;padding:6px 12px;border-radius:var(--r-s);font-size:14.5px}
.spec-row:nth-child(odd){background:#F7FAFE}
.spec-row dt{color:var(--ink-3);font-size:13.5px}
.spec-row dd{margin:0;color:var(--ink);font-variant-numeric:tabular-nums}

/* 评价墙 */
.review-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.review-col{display:grid;gap:24px}
.review-col.offset{margin-top:32px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:24px;box-shadow:var(--sh-1);transition:all .2s ease-out}
.review-card:hover{border-color:rgba(22,87,216,.26);box-shadow:var(--sh-2);transform:translateY(-2px)}
.review-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}
.review-name{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.review-platform{font-size:11.5px;color:var(--teal);border:1px solid rgba(23,184,166,.4);border-radius:var(--pill);padding:1px 8px;font-weight:600}
.stars{color:var(--amber);font-size:12.5px;letter-spacing:2px;margin-left:auto}
.review-text{margin:0 0 12px;font-size:14.5px;color:var(--ink-2);line-height:1.85}
.review-time{font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}

/* 下载区 */
.download-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:40px;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
.download-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:22px}
.download-note{margin-top:18px;font-size:13.5px;color:var(--ink-3);line-height:1.9}
.qr-box{display:flex;gap:20px;align-items:center;background:var(--bg-2);border:1px dashed #C8D8EE;border-radius:var(--r-m);padding:20px}
.qr-img{width:104px;height:104px;border-radius:var(--r-s);background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink-3);font-size:34px;flex-shrink:0}
.qr-meta{font-size:13px;color:var(--ink-2);line-height:1.9}
.hash-value{display:block;margin-top:6px;font-size:12.5px;color:var(--ink-3);word-break:break-all;font-variant-numeric:tabular-nums}

/* 资讯列表 */
.chips-row{display:flex;gap:8px;flex-wrap:wrap}
.chip-btn{display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--pill);font-size:13.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);transition:all .18s ease-out}
.chip-btn:hover{border-color:var(--brand);color:var(--brand)}
.chip-btn.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.news-layout{display:grid;grid-template-columns:6fr 6fr;gap:28px;align-items:start}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);transition:border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out}
.card:hover{border-color:rgba(22,87,216,.24);box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-feature{overflow:hidden;display:flex;flex-direction:column}
.news-feature-media{display:block;overflow:hidden}
.news-feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease-out}
.news-feature:hover .news-feature-media img{transform:scale(1.03)}
.news-feature-body{padding:24px}
.news-feature-body h3{font-size:20px;font-weight:600;margin:14px 0 10px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-feature-body h3 a{color:var(--ink)}
.news-feature-body h3 a:hover{color:var(--brand)}
.news-feature-body p{margin:0;color:var(--ink-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-list{display:grid;gap:16px}
.news-item{display:flex;gap:18px;padding:20px 24px;align-items:flex-start}
.news-item-body{min-width:0;flex:1}
.news-item h3{font-size:17px;font-weight:600;line-height:1.5;margin:10px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item h3 a{color:var(--ink)}
.news-item h3 a:hover{color:var(--brand)}
.news-item p{margin:0;font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:12.5px;color:var(--ink-3);flex-wrap:wrap}
.news-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:var(--line)}
.badge-new{background:rgba(255,138,43,.14);color:#C4600E;font-size:11.5px;font-weight:700;border-radius:var(--pill);padding:2px 9px}
.empty-state{border:1px dashed #C8D8EE;border-radius:var(--r-l);min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:40px 24px;text-align:center;background:#fff}
.empty-state i{font-size:40px;color:rgba(22,87,216,.3)}
.empty-state p{margin:0;color:var(--ink-2);font-size:15px}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);background:transparent;transition:background-color .2s ease-out}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;padding:24px 20px;font-size:17px;font-weight:600;color:var(--ink);transition:all .2s ease-out}
.faq-q:hover{color:var(--brand)}
.faq-icon{width:26px;height:26px;flex-shrink:0;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:transform .2s ease-out}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--brand);color:#fff}
.faq-a{display:none;padding:0 20px 24px 20px;border-left:4px solid var(--brand);margin-left:0;background:#F7FAFE}
.faq-item.is-open{background:#F7FAFE}
.faq-a p{margin:0;color:var(--ink-2);font-size:15px}

/* CTA */
.cta-band{background:var(--brand);border-radius:var(--r-l);padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;color:#fff;box-shadow:0 24px 48px -28px rgba(14,62,158,.7)}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);color:#fff;line-height:1.35}
.cta-band p{margin:10px 0 0;color:rgba(255,255,255,.86);font-size:15px;max-width:640px}
.cta-band .btn-white{background:#fff;color:var(--brand-deep);height:52px;padding:0 30px}
.cta-band .btn-white:hover{background:#F2F6FF;color:var(--brand-deep);transform:translateY(-2px)}
.cta-band .btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);height:52px;padding:0 30px}
.cta-band .btn-line:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}

/* 页脚 */
.site-footer{background:var(--footer);color:#fff;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{color:#fff}
.footer-brand span{font-size:17px;font-weight:700;color:#fff}
.footer-desc{color:rgba(255,255,255,.72);font-size:14px;line-height:1.9;margin:0;max-width:340px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:600}
.footer-col ul{display:grid;gap:11px}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.66)}
.footer-bottom a{color:rgba(255,255,255,.66)}
.footer-bottom a:hover{color:#fff}
.to-top{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.8);font-size:13px}
.to-top:hover{color:#fff}

/* 移动端悬浮下载条 */
.sticky-download{position:fixed;left:0;right:0;bottom:0;z-index:90;background:#fff;border-top:1px solid var(--line);box-shadow:0 -10px 30px -18px rgba(16,42,84,.4);padding:10px 16px;display:none;align-items:center;gap:12px;opacity:0;transform:translateY(100%);transition:opacity .25s ease-out,transform .25s ease-out}
.sticky-download.is-visible{opacity:1;transform:translateY(0)}
.sticky-download .sd-meta{font-size:12.5px;color:var(--ink-3);line-height:1.5}
.sticky-download .sd-meta strong{display:block;color:var(--ink);font-size:14px;font-variant-numeric:tabular-nums}
.sticky-download .btn{flex:1;height:46px}

/* 响应式 */
@media screen and (max-width:1199px){
  .grid-container{padding-left:24px;padding-right:24px}
  .hero-inner{gap:40px}
}
@media screen and (max-width:1023px){
  :root{--sec:64px}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .brand-inner{height:64px;gap:14px}
  .hero{padding:52px 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-sub{font-size:16px}
  .trust-bar{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .value-grid{grid-template-columns:1fr;gap:32px}
  .shot{flex:0 0 100%}
  .shot.is-center{transform:none}
  .spec-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .review-col.offset{margin-top:0}
  .download-panel{grid-template-columns:1fr;padding:32px}
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:36px 32px}
  .sticky-download{display:flex}
  body{padding-bottom:76px}
}
@media screen and (max-width:639px){
  :root{--sec:48px}
  .grid-container{padding-left:18px;padding-right:18px}
  .brand-name{font-size:16px}
  .channel-inner{height:46px}
  .hero-title{font-size:28px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .trust-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .float-card{position:static;margin-top:16px;max-width:100%}
  .news-item{padding:18px;gap:14px}
  .news-feature-body{padding:20px}
  .faq-q{font-size:15.5px;padding:20px 14px;gap:12px}
  .faq-a{padding:0 14px 20px 14px}
  .download-panel{padding:24px}
  .qr-box{flex-direction:column;align-items:flex-start;gap:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band{padding:30px 22px;border-radius:var(--r-m)}
  .cta-band .btn-white,.cta-band .btn-line{width:100%}
  .section-head{margin-bottom:28px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .shot-track{transition:none}
}

/* roulang page: category1 */
:root{
  --c-primary:#1657D8;
  --c-primary-deep:#0E3E9E;
  --c-primary-soft:#E8F0FE;
  --c-teal:#17B8A6;
  --c-amber:#FF8A2B;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-line:#DFE7F2;
  --c-text:#16233A;
  --c-text-2:#4E5F7A;
  --c-text-3:#8496B0;
  --c-footer:#0B1F44;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,84,.06), 0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 6px rgba(16,42,84,.08), 0 18px 40px -16px rgba(16,42,84,.24);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --sect:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;}
a:hover,a:focus{color:var(--c-primary-deep);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
:focus-visible{outline:3px solid rgba(22,87,216,.32);outline-offset:2px;border-radius:4px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{max-width:1320px;}
.section{padding:var(--sect) 0;}
.section-sm{padding-top:48px;padding-bottom:48px;}
.section-head{margin-bottom:var(--sp-7);max-width:760px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:14px;
}
h2.h-sec{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:0;color:var(--c-text);}
.section-head p{margin-top:12px;color:var(--c-text-2);font-size:16px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:all .18s ease-out;white-space:nowrap;
  min-width:44px;
}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);box-shadow:0 10px 22px -12px rgba(22,87,216,.7);}
.btn-primary:hover,.btn-primary:focus{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:rgba(22,87,216,.4);}
.btn-ghost:hover,.btn-ghost:focus{background:var(--c-primary-soft);color:var(--c-primary-deep);border-color:var(--c-primary);}
.btn-lg{height:56px;padding:0 34px;font-size:16px;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-more{font-weight:600;text-decoration:underline;text-underline-offset:4px;color:var(--c-primary);}
.link-more:hover{color:var(--c-primary-deep);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;line-height:1;
  padding:5px 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary-deep);
}
.badge-teal{background:rgba(23,184,166,.12);color:#0E8C7F;}
.badge-amber{background:rgba(255,138,43,.14);color:#C25E0A;}
.badge-outline{background:#fff;border:1px solid var(--c-line);color:var(--c-text-2);}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;transition:box-shadow .2s ease-out;}
.site-header.is-stuck{box-shadow:var(--sh-1);}
.header-top{border-bottom:1px solid var(--c-line);}
.header-top-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--c-text);letter-spacing:0;}
.brand:hover{color:var(--c-primary);}
.brand-mark{width:24px;height:24px;color:var(--c-primary);flex:none;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 14px;border-radius:var(--r-s);
  font-size:15px;color:var(--c-text-2);font-weight:500;transition:all .16s ease-out;
}
.main-nav a:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.main-nav a.active{color:var(--c-primary-deep);font-weight:700;background:var(--c-primary-soft);}
.header-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-s);border:1px solid var(--c-line);
  background:#fff;color:var(--c-text-2);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  transition:all .16s ease-out;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.menu-toggle{display:none;}
.header-channels{background:var(--c-surface-2);border-bottom:1px solid var(--c-line);}
.channel-scroll{display:flex;gap:6px;overflow-x:auto;padding:6px 0;-ms-overflow-style:none;scrollbar-width:none;}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-scroll a{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 14px;font-size:14px;color:var(--c-text-2);white-space:nowrap;border-radius:var(--r-s);
  transition:all .16s ease-out;
}
.channel-scroll a:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.channel-scroll a.active{color:var(--c-primary-deep);font-weight:700;}
.channel-scroll a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:3px;
  background:var(--c-primary);border-radius:3px;
}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;background:#fff;border-bottom:1px solid var(--c-line);
  padding:44px 0 32px;overflow:hidden;
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;
  opacity:.12;pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:2;max-width:860px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:16px;}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb span.sep{color:var(--c-text-3);}
.crumb .current{color:var(--c-text-3);}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.22;font-weight:700;letter-spacing:0;color:var(--c-text);
}
.cat-hero h1 em{font-style:normal;color:var(--c-primary);}
.cat-hero .hero-desc{margin-top:14px;color:var(--c-text-2);font-size:16px;max-width:720px;}
.anchor-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.anchor-row a{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--c-line);background:#fff;
  font-size:14px;color:var(--c-text-2);font-weight:500;transition:all .16s ease-out;
}
.anchor-row a:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.anchor-row a i{font-size:12px;color:var(--c-teal);}

/* ---------- 分类主体布局 ---------- */
.cat-layout{display:grid;grid-template-columns:248px minmax(0,1fr);gap:40px;align-items:start;}
.toc-card{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-l);
  box-shadow:var(--sh-1);padding:22px;
}
.toc-card h3{font-size:15px;font-weight:700;color:var(--c-text);margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;align-items:flex-start;gap:10px;
  padding:9px 10px;border-radius:var(--r-s);
  font-size:14px;color:var(--c-text-2);line-height:1.5;transition:all .16s ease-out;
}
.toc-list a i{margin-top:4px;font-size:8px;color:var(--c-text-3);transition:color .16s ease-out;}
.toc-list a:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.toc-list a:hover i{color:var(--c-primary);}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--c-text-3);line-height:1.7;
}
.toc-note .num{color:var(--c-primary);font-weight:600;}

/* ---------- 模块卡 ---------- */
.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.module-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  box-shadow:var(--sh-1);overflow:hidden;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  display:flex;flex-direction:column;
}
.module-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.3);}
.module-thumb{position:relative;aspect-ratio:16/9;background:var(--c-surface-2);overflow:hidden;}
.module-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.module-card:hover .module-thumb img{transform:scale(1.03);}
.module-thumb .idx{
  position:absolute;left:14px;top:14px;
  background:rgba(255,255,255,.94);color:var(--c-primary-deep);
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:12px;font-weight:700;padding:4px 10px;border-radius:var(--r-pill);
}
.module-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.module-body h3{font-size:20px;line-height:1.35;font-weight:600;color:var(--c-text);}
.module-body p{font-size:15px;color:var(--c-text-2);line-height:1.8;}
.module-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:8px;}

/* ---------- 相关资讯紧凑列表 ---------- */
.news-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.news-item{
  display:flex;gap:14px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-m);padding:16px;transition:all .18s ease-out;
}
.news-item:hover{border-color:rgba(22,87,216,.3);box-shadow:var(--sh-1);transform:translateY(-2px);}
.news-thumb{width:72px;height:72px;flex:none;border-radius:var(--r-s);overflow:hidden;background:var(--c-surface-2);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-txt{min-width:0;}
.news-txt .badge{margin-bottom:8px;}
.news-txt h4{
  font-size:15px;line-height:1.5;font-weight:600;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-txt h4 a{color:inherit;}
.news-txt h4 a:hover{color:var(--c-primary);}
.news-txt time{display:block;margin-top:8px;font-size:12px;color:var(--c-text-3);}

/* ---------- 交叉链接 ---------- */
.cross-nav{display:flex;flex-wrap:wrap;gap:12px;}
.cross-nav a{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--c-text-2);transition:all .16s ease-out;
}
.cross-nav a:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.cross-nav a i{color:var(--c-teal);font-size:12px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item:first-child{border-top:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-text);transition:all .18s ease-out;
}
.faq-q:hover{background:#F7FAFE;color:var(--c-primary-deep);}
.faq-item.open .faq-q{background:#F7FAFE;color:var(--c-primary-deep);border-left:3px solid var(--c-primary);}
.faq-q .ico{flex:none;color:var(--c-primary);transition:transform .2s ease-out;}
.faq-item.open .faq-q .ico{transform:rotate(180deg);}
.faq-a{display:none;padding:0 20px 22px;border-left:3px solid var(--c-primary);background:#F7FAFE;}
.faq-item.open .faq-a{display:block;}
.faq-a p{font-size:15px;color:var(--c-text-2);line-height:1.85;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  background:var(--c-primary-deep);border-radius:var(--r-l);color:#fff;
  padding:48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-bar h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;color:#fff;}
.cta-bar p{margin-top:10px;color:rgba(255,255,255,.78);font-size:15px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-bar .btn-primary{background:#fff;color:var(--c-primary-deep);border-color:#fff;box-shadow:none;}
.cta-bar .btn-primary:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.cta-bar .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.cta-bar .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);margin-top:var(--sect);padding:64px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand .brand-mark{color:#7FA9F5;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:360px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color .16s ease-out;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .to-top{color:rgba(255,255,255,.72);}
.footer-bottom .to-top:hover{color:#fff;}

/* ---------- 移动端 ---------- */
@media (max-width:1199px){
  :root{--sect:72px;}
  .cat-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .toc-card{position:static;}
  .toc-list{flex-direction:row;flex-wrap:wrap;}
  .toc-list a{padding:8px 12px;}
  .news-list{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  :root{--sect:64px;}
  .header-top-inner{height:66px;gap:14px;}
  .main-nav{
    display:none;position:absolute;top:66px;left:16px;right:16px;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-m);
    box-shadow:var(--sh-2);padding:12px;z-index:90;
  }
  .main-nav.open{display:flex;}
  .main-nav a{height:48px;}
  .menu-toggle{display:inline-flex;}
  .header-actions .btn{display:none;}
  .module-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .cta-bar{padding:36px;}
}
@media (max-width:639px){
  :root{--sect:48px;}
  .container{padding:0 18px;}
  .brand span{font-size:16px;}
  .cat-hero{padding:32px 0 26px;}
  .cat-hero .hero-desc{font-size:15px;}
  .anchor-row a{height:36px;padding:0 13px;font-size:13px;}
  .module-body{padding:18px 18px 20px;}
  .news-list{grid-template-columns:minmax(0,1fr);}
  .cta-bar{padding:28px;border-radius:var(--r-m);}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --brand:#1657D8;
  --brand-deep:#0E3E9E;
  --brand-soft:#E8F0FE;
  --teal:#17B8A6;
  --amber:#FF8A2B;
  --bg:#F5F8FC;
  --bg-2:#EEF3FA;
  --card:#FFFFFF;
  --line:#DFE7F2;
  --text:#16233A;
  --text-2:#4E5F7A;
  --text-3:#8496B0;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,84,.06), 0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 6px rgba(16,42,84,.08), 0 18px 40px -18px rgba(16,42,84,.22);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out}
a:hover{color:var(--brand-deep)}
button{font:inherit;cursor:pointer}
input,textarea,select{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:3px solid rgba(22,87,216,.32);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.grid-container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;width:100%}

/* ---------- 按钮 / 徽章 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;border:1px solid transparent;
  transition:transform .16s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(22,87,216,.42)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:rgba(22,87,216,.6)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:56px;padding:0 32px;font-size:17px}
.btn-download{height:44px;padding:0 20px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge-teal{background:rgba(23,184,166,.14);color:#0F8477}
.badge-amber{background:rgba(255,138,43,.16);color:#C25E10}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 14px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--text-2);
}
.tag:hover{border-color:rgba(22,87,216,.5);color:var(--brand);background:var(--brand-soft)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.brand-row{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:19px}
.brand:hover{color:var(--brand)}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 auto}
.brand-name{white-space:nowrap}
.brand-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand);border-color:rgba(22,87,216,.4)}
.icon-btn[aria-expanded="true"]{background:var(--brand);color:#fff;border-color:var(--brand)}
.channel-row{background:var(--bg-2);border-top:1px solid var(--line)}
.main-nav{display:flex;align-items:stretch;gap:2px;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;
  height:50px;padding:0 18px;white-space:nowrap;
  font-size:15px;color:var(--text-2);font-weight:500;
}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:600;box-shadow:inset 0 -3px 0 0 var(--brand)}
.search-panel{
  border-top:1px solid var(--line);background:#fff;
  padding:18px 0 22px;
}
.search-panel[hidden]{display:none}
.search-box{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 16px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-m);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(22,87,216,.22)}
.search-box i{color:var(--text-3)}
.search-box input{flex:1;border:0;background:transparent;outline:none;color:var(--text);font-size:15px}
.search-results{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px}
.search-results a{display:block;padding:10px 14px;border-radius:var(--r-s);font-size:14px;color:var(--text-2)}
.search-results a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding:24px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .current{color:var(--text-3);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.crumb-cat{color:var(--text-2)}

/* ---------- 文章头 ---------- */
.article-hero{padding:18px 0 0}
.article-head{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  padding:36px 40px;box-shadow:var(--sh-1);
}
.article-head h1{
  font-size:clamp(26px,3.4vw,40px);line-height:1.25;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:18px;font-size:13.5px;color:var(--text-3)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta i{color:var(--text-3)}
.article-lead{margin-top:16px;font-size:16px;color:var(--text-2);line-height:1.9;max-width:76ch}
.article-cover{margin:24px 0 0;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--bg-2)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ---------- 正文布局 ---------- */
.article-section{padding:48px 0 0}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,780px) 240px;
  gap:56px;
  justify-content:center;
  align-items:start;
}
.article-main{order:1;min-width:0;background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);padding:40px 44px;box-shadow:var(--sh-1)}
.article-body{font-size:17px;line-height:1.95;color:var(--text);overflow-wrap:break-word}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  font-size:clamp(21px,2.2vw,26px);line-height:1.35;margin:40px 0 16px;
  padding-left:14px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:20px;line-height:1.4;margin:32px 0 12px;color:var(--text)}
.article-body h4{font-size:17px;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.35em}
.article-body li{margin-bottom:.45em}
.article-body a{text-decoration:underline;text-underline-offset:3px}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;
  background:#F2F7FF;border-left:4px solid var(--brand);border-radius:0 var(--r-m) var(--r-m) 0;
  color:var(--text-2);font-size:16px;
}
.article-body img{border-radius:var(--r-m);margin:24px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--text-3)}
.article-body table{
  display:block;width:100%;overflow-x:auto;
  border-collapse:collapse;font-size:15px;margin:24px 0;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap}
.article-body th{background:var(--bg-2);font-weight:600}
.article-body code{background:var(--bg-2);border-radius:6px;padding:2px 6px;font-size:14px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ---------- 目录 ---------- */
.toc{
  order:2;position:sticky;top:140px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  padding:20px;box-shadow:var(--sh-1);
}
.toc-title{font-size:13px;font-weight:600;color:var(--text-3);margin-bottom:10px}
.toc-body ul{list-style:none;border-left:2px solid var(--line)}
.toc-body li a{
  display:block;padding:6px 0 6px 12px;margin-left:-2px;
  border-left:2px solid transparent;
  font-size:14px;line-height:1.55;color:var(--text-2);
  overflow:hidden;text-overflow:ellipsis;
}
.toc-body li a:hover{color:var(--brand);background:var(--brand-soft)}
.toc-body li a.is-active{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.toc-body li.toc-sub a{padding-left:24px;font-size:13px}
.toc-toggle{
  display:none;width:100%;align-items:center;justify-content:space-between;gap:10px;
  background:transparent;border:0;padding:0;color:var(--text);font-size:15px;font-weight:600;
}
.toc-toggle i{transition:transform .2s ease-out;color:var(--brand)}
.toc.is-open .toc-toggle i{transform:rotate(180deg)}

/* ---------- 标签 / 上下篇 ---------- */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.tag-label{font-size:13px;color:var(--text-3);margin-right:2px}
.pn-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:24px}
.pn-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);
  padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.pn-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.32)}
.pn-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-3);margin-bottom:8px}
.pn-title{display:block;font-size:16px;font-weight:600;color:var(--text);line-height:1.5}
.pn-card:hover .pn-title{color:var(--brand)}
.pn-card.next{text-align:right}
.pn-card.next .pn-label{justify-content:flex-end}
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* ---------- 相关推荐 ---------- */
.section{padding:88px 0 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3}
.section-head p{margin-top:8px;color:var(--text-2);font-size:15px;max-width:64ch}
.cards-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.32)}
.card-thumb{position:relative;background:var(--bg-2)}
.card-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-thumb .label-float{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94)}
.card-body{padding:20px 22px 24px}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600}
.card-body h3 a{color:var(--text)}
.card-body h3 a:hover{color:var(--brand)}
.card-body p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:14px;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3)}
.card-foot .more{color:var(--brand);font-weight:600}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);margin-bottom:12px;overflow:hidden}
.faq-item[open]{background:#F7FAFE;border-color:rgba(22,87,216,.32);box-shadow:var(--sh-1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .fx{color:var(--brand);font-size:14px;transition:transform .2s ease-out}
.faq-item[open] summary .fx{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.9}

/* ---------- 下载 CTA ---------- */
.cta{
  background:var(--brand-deep);border-radius:var(--r-l);
  padding:48px 44px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;
}
.cta h2{font-size:clamp(22px,2.6vw,30px);color:#fff}
.cta p{margin-top:12px;color:rgba(255,255,255,.82);font-size:15px;max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta .btn-light{background:#fff;color:var(--brand-deep);border-color:#fff}
.cta .btn-light:hover{background:#EAF1FF;color:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px -14px rgba(0,0,0,.5)}
.cta .btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.cta .btn-line:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.cta-meta{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px 28px;font-size:13px;color:rgba(255,255,255,.7)}
.cta-meta span{display:inline-flex;align-items:center;gap:8px}
.cta-meta i{color:var(--teal)}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-m);
  min-height:220px;padding:40px 24px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;
  background:#FBFCFE;
}
.empty-state i{font-size:40px;color:rgba(22,87,216,.3)}
.empty-state p{font-size:16px;font-weight:600;color:var(--text)}
.empty-state .empty-sub{font-size:14px;font-weight:400;color:var(--text-2);max-width:46ch;line-height:1.8}
.empty-state .btn{margin-top:8px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0B1F44;color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;margin-bottom:14px}
.footer-brand .brand-mark{width:26px;height:26px;color:#8FB6FF}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:42ch}
.footer-col h4{color:#fff;font-size:15px;margin:0 0 16px;font-weight:600}
.footer-col ul{list-style:none}
.footer-col li+li{margin-top:10px}
.site-footer a{color:rgba(255,255,255,.72)}
.site-footer a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.8)}
.to-top:hover{color:#fff}
.to-top i{font-size:12px}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,720px) 220px;gap:32px}
}
@media screen and (max-width:1023px){
  .section{padding:64px 0 0}
  .article-section{padding:36px 0 0}
  .article-head{padding:28px 24px}
  .article-main{padding:28px 24px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:20px}
  .toc{order:-1;position:static;top:auto;padding:18px 20px}
  .toc-toggle{display:flex}
  .toc-title{display:none}
  .toc-body{display:none}
  .toc.is-open .toc-body{display:block;margin-top:14px}
  .cards-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cta{padding:36px 28px}
  .site-footer{margin-top:64px}
}
@media screen and (max-width:639px){
  .grid-container{padding-left:18px;padding-right:18px}
  .section{padding:48px 0 0}
  .brand-row{height:64px}
  .brand{font-size:17px}
  .brand-name{max-width:52vw;overflow:hidden;text-overflow:ellipsis}
  .brand-actions .btn span{display:none}
  .brand-actions .btn{padding:0 14px}
  .main-nav a{height:48px;padding:0 14px;font-size:14.5px}
  .article-body{font-size:16.5px;line-height:1.9}
  .article-body h2{margin-top:32px}
  .pn-grid{grid-template-columns:minmax(0,1fr)}
  .pn-card.next{text-align:left}
  .pn-card.next .pn-label{justify-content:flex-start}
  .cards-3{grid-template-columns:minmax(0,1fr)}
  .search-results{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .cta{padding:28px 22px}
  .article-actions .btn{flex:1 1 auto}
  .cta-actions .btn{flex:1 1 auto}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .btn:hover,.card:hover,.pn-card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --primary:#1657D8;
  --primary-deep:#0E3E9E;
  --primary-light:#E8F0FE;
  --primary-a08:rgba(22,87,216,.08);
  --primary-a20:rgba(22,87,216,.20);
  --primary-a30:rgba(22,87,216,.30);
  --teal:#17B8A6;
  --amber:#FF8A2B;
  --bg:#F5F8FC;
  --bg-2:#EEF3FA;
  --card:#FFFFFF;
  --line:#DFE7F2;
  --text:#16233A;
  --text-2:#4E5F7A;
  --text-3:#8496B0;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,84,.06),0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 4px rgba(16,42,84,.08),0 16px 36px -14px rgba(16,42,84,.22);
  --sp-4:4px; --sp-8:8px; --sp-12:12px; --sp-16:16px;
  --sp-24:24px; --sp-32:32px; --sp-48:48px; --sp-64:64px; --sp-96:96px;
  --sec-pad:88px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out;}
a:hover{color:var(--primary-deep);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding-left:1.1em;}
.num,.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}

.grid-container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;}
.brandbar{border-bottom:1px solid var(--line);}
.brandbar-inner{
  display:flex;align-items:center;gap:var(--sp-24);
  min-height:72px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--primary);}
.brand-mark{width:24px;height:24px;color:var(--primary);flex:0 0 auto;}
.brand-name{font-size:19px;font-weight:700;letter-spacing:0;white-space:nowrap;}
.brand-actions{margin-left:auto;display:flex;align-items:center;gap:var(--sp-12);}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .18s ease-out;
}
.icon-btn:hover{border-color:var(--primary-a30);color:var(--primary);background:var(--primary-light);}

.channelbar{background:var(--bg-2);border-bottom:1px solid var(--line);}
.main-nav{display:flex;align-items:center;gap:var(--sp-4);overflow-x:auto;scrollbar-width:none;min-height:50px;}
.main-nav::-webkit-scrollbar{display:none;}
.main-nav a{
  position:relative;
  display:inline-flex;align-items:center;
  height:50px;padding:0 16px;
  font-size:15px;color:var(--text-2);white-space:nowrap;
  border-bottom:3px solid transparent;
  transition:all .18s ease-out;
}
.main-nav a:hover{background:var(--primary-light);color:var(--primary);}
.main-nav a.active{color:var(--primary-deep);font-weight:600;border-bottom-color:var(--primary);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;min-height:44px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary-a30);}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-deep);border-color:var(--primary);transform:translateY(-2px);}
.btn-sm{padding:11px 20px;font-size:14px;min-height:44px;}
.btn:focus-visible,.icon-btn:focus-visible,.faq-q:focus-visible,a:focus-visible{
  outline:none;box-shadow:0 0 0 3px var(--primary-a30);
}

/* ============ 小 Hero ============ */
.page-hero{
  position:relative;
  background-image:linear-gradient(100deg,rgba(245,248,252,.97) 0%,rgba(245,248,252,.90) 52%,rgba(232,240,254,.72) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  padding:56px 0 40px;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;right:-90px;top:-120px;width:380px;height:380px;
  border:1px solid var(--primary);
  border-radius:50%;opacity:.06;pointer-events:none;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--text-3);}
.page-hero h1{
  font-size:clamp(30px,4.2vw,44px);
  line-height:1.18;font-weight:700;letter-spacing:0;
  max-width:820px;margin-bottom:16px;
}
.page-hero .hero-sub{
  font-size:16px;line-height:1.85;color:var(--text-2);
  max-width:760px;margin-bottom:26px;
}
.anchor-tabs{display:flex;flex-wrap:wrap;gap:10px;}
.anchor-tab{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);
  font-size:14px;color:var(--text-2);
  transition:all .18s ease-out;
}
.anchor-tab:hover{border-color:var(--primary-a30);color:var(--primary);background:var(--primary-light);transform:translateY(-2px);}
.anchor-tab i{font-size:12px;color:var(--primary);}

/* ============ 通用板块 ============ */
.section{padding:var(--sec-pad) 0;}
.section-alt{background:var(--bg-2);}
.section-head{max-width:760px;margin-bottom:var(--sp-48);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-light);
  padding:6px 14px;border-radius:var(--r-pill);
  margin-bottom:16px;
}
.eyebrow i{font-size:12px;}
.section-title{font-size:clamp(24px,2.6vw,32px);line-height:1.25;font-weight:700;margin-bottom:14px;}
.section-sub{font-size:16px;color:var(--text-2);line-height:1.85;}

/* ============ 配置对照 + 安装步骤 ============ */
.spec-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:var(--sp-32);align-items:start;}
.spec-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh-1);overflow:hidden;
}
.spec-panel-head{
  padding:22px 28px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
}
.spec-panel-head h3{font-size:20px;font-weight:600;}
.spec-panel-head .hint{font-size:13px;color:var(--text-3);margin-left:auto;}
.spec-cols{display:grid;grid-template-columns:1fr 1fr;gap:0;}
.spec-col{padding:24px 28px;}
.spec-col + .spec-col{border-left:1px solid var(--line);background:#FBFDFF;}
.spec-col h4{
  font-size:15px;font-weight:600;color:var(--primary-deep);
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.spec-col h4 .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);}
.spec-col.recommend h4 .dot{background:var(--teal);}
.spec-row{
  display:flex;align-items:flex-start;gap:12px;
  min-height:44px;padding:10px 0;
  border-bottom:1px dashed var(--line);
}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{flex:0 0 96px;font-size:14px;color:var(--text-3);line-height:1.6;}
.spec-row dd{flex:1;font-size:14.5px;color:var(--text);line-height:1.6;}

/* 时间轴 */
.steps-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh-1);padding:28px;
}
.steps-panel h3{font-size:20px;font-weight:600;margin-bottom:6px;}
.steps-panel .steps-note{font-size:13.5px;color:var(--text-3);margin-bottom:24px;}
.steps{list-style:none;padding:0;margin:0;position:relative;}
.steps::before{
  content:"";position:absolute;left:15px;top:14px;bottom:22px;
  width:2px;background:var(--line);
}
.steps li{position:relative;padding:0 0 26px 48px;}
.steps li:last-child{padding-bottom:0;}
.step-num{
  position:absolute;left:0;top:0;
  width:32px;height:32px;border-radius:50%;
  background:var(--primary-light);color:var(--primary-deep);
  border:2px solid #fff;box-shadow:0 0 0 1px var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;
}
.steps li:first-child .step-num{background:var(--primary);color:#fff;box-shadow:0 0 0 1px var(--primary);}
.step-title{font-size:16px;font-weight:600;margin-bottom:4px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.step-title .tag{
  font-size:12px;font-weight:600;color:var(--teal);
  background:rgba(23,184,166,.12);border-radius:var(--r-pill);padding:2px 10px;
}
.step-desc{font-size:14px;color:var(--text-2);line-height:1.7;}

/* ============ 平台卡片 ============ */
.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-24);}
.platform-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  display:flex;flex-direction:column;
}
.platform-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--primary-a20);}
.platform-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.platform-card .thumb img{width:100%;height:100%;object-fit:cover;}
.platform-card .body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.platform-card h3{font-size:19px;font-weight:600;display:flex;align-items:center;gap:10px;}
.platform-card h3 i{color:var(--primary);font-size:18px;}
.platform-card p{font-size:14.5px;color:var(--text-2);line-height:1.75;}
.platform-meta{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--line);
  display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3);
}
.platform-meta strong{color:var(--text);font-weight:600;}

/* ============ 安装包与校验 ============ */
.pkg-wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:var(--sp-32);align-items:center;}
.pkg-figure{border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.pkg-figure img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.pkg-cards{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-16);}
.pkg-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);
  padding:20px;box-shadow:var(--sh-1);
}
.pkg-card .k{font-size:13px;color:var(--text-3);margin-bottom:6px;}
.pkg-card .v{font-size:20px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;}
.pkg-card .v small{font-size:13px;font-weight:500;color:var(--text-3);margin-left:4px;}
.hash-box{
  margin-top:var(--sp-16);
  background:var(--bg-2);border:1px dashed var(--line);border-radius:var(--r-m);
  padding:16px 18px;
}
.hash-box .k{font-size:13px;color:var(--text-3);margin-bottom:8px;}
.hash-box code{
  display:block;font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  font-size:13px;word-break:break-all;color:var(--primary-deep);line-height:1.7;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;border-radius:var(--r-pill);
  padding:4px 12px;
}
.badge-primary{background:var(--primary-light);color:var(--primary-deep);}
.badge-teal{background:rgba(23,184,166,.12);color:#0E9184;}
.badge-amber{background:rgba(255,138,43,.14);color:#C25C0A;}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;background:none;border:0;
  display:flex;align-items:center;gap:16px;
  padding:22px 26px;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--text);line-height:1.6;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.faq-q:hover{background:#F7FAFE;color:var(--primary-deep);}
.faq-icon{
  margin-left:auto;flex:0 0 auto;position:relative;
  width:18px;height:18px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .25s ease-out,padding .25s ease-out;
  padding:0 26px;
}
.faq-item.open .faq-a{max-height:420px;padding-bottom:22px;}
.faq-item.open{background:#F7FAFE;border-left:4px solid var(--primary);}
.faq-item.open .faq-q{padding-left:22px;}
.faq-a p{font-size:14.8px;color:var(--text-2);line-height:1.8;max-width:720px;}

/* ============ 相关分类 + CTA ============ */
.chip-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:var(--sp-24);}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);min-height:44px;
  transition:all .18s ease-out;
}
.chip:hover{border-color:var(--primary-a30);background:var(--primary-light);color:var(--primary-deep);transform:translateY(-2px);}
.chip i{font-size:12px;color:var(--primary);}

.cta-band{
  background:var(--primary-deep);
  color:#fff;border-radius:var(--r-l);
  padding:44px 40px;
  display:flex;align-items:center;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.3;margin-bottom:10px;}
.cta-band p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.78);max-width:620px;}
.cta-actions{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap;}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.cta-band .btn-primary{background:#fff;color:var(--primary-deep);}
.cta-band .btn-primary:hover{background:#E8F0FE;color:var(--primary-deep);}

/* ============ 页脚 ============ */
.site-footer{background:#0B1F44;color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:var(--sec-pad);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:16px;}
.footer-brand .brand-mark{color:#7FB0FF;width:24px;height:24px;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h4{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px;}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.58);
}
.footer-bottom .to-top{margin-left:auto;color:rgba(255,255,255,.72);display:inline-flex;align-items:center;gap:8px;min-height:44px;}
.footer-bottom .to-top:hover{color:#fff;}

/* ============ 响应式 ============ */
@media screen and (max-width:1199px){
  :root{--container:100%;}
}
@media screen and (max-width:1023px){
  :root{--sec-pad:64px;}
  .brandbar-inner{min-height:64px;gap:16px;}
  .brand-name{font-size:17px;}
  .spec-grid{grid-template-columns:1fr;}
  .platform-grid{grid-template-columns:1fr 1fr;}
  .pkg-wrap{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:36px 28px;}
  .cta-actions{margin-left:0;width:100%;}
}
@media screen and (max-width:639px){
  :root{--sec-pad:48px;}
  .grid-container{padding-left:18px;padding-right:18px;}
  .page-hero{padding:36px 0 30px;}
  .page-hero h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .spec-cols{grid-template-columns:1fr;}
  .spec-col + .spec-col{border-left:0;border-top:1px solid var(--line);}
  .spec-col{padding:20px 20px;}
  .spec-panel-head{padding:18px 20px;}
  .spec-panel-head .hint{margin-left:0;width:100%;}
  .steps-panel{padding:22px 20px;}
  .platform-grid{grid-template-columns:1fr;}
  .pkg-cards{grid-template-columns:1fr;}
  .faq-q{padding:18px 18px;font-size:15.5px;gap:12px;}
  .faq-a{padding:0 18px;}
  .faq-item.open .faq-a{padding-bottom:18px;}
  .faq-item.open .faq-q{padding-left:14px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-bottom .to-top{margin-left:0;}
  .cta-band{padding:30px 22px;}
  .btn{padding:13px 22px;width:100%;}
  .brand-actions .btn{width:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --brand:#1657D8;
  --brand-deep:#0E3E9E;
  --brand-soft:#E8F0FE;
  --brand-ghost:rgba(22,87,216,.2);
  --teal:#17B8A6;
  --amber:#FF8A2B;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FA;
  --surface-3:#F7FAFE;
  --line:#DFE7F2;
  --text:#16233A;
  --text-2:#4E5F7A;
  --text-3:#8496B0;
  --footer-bg:#0B1F44;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,84,.06),0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 6px rgba(16,42,84,.08),0 18px 40px -18px rgba(16,42,84,.24);
  --container:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:3px solid rgba(22,87,216,.32);outline-offset:2px;border-radius:var(--r-s);}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.grid-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.grid-container.full{padding:0;}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow .2s var(--ease);}
.site-header.is-stuck{box-shadow:var(--sh-1);}
.brandbar-inner{display:flex;align-items:center;gap:28px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px;letter-spacing:0;flex:0 0 auto;}
.brand:hover{color:var(--brand);}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 26px;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;min-width:0;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  color:var(--text-2);
  font-size:15px;
  font-weight:500;
  border-radius:var(--r-s);
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft);}
.main-nav a.active{color:var(--brand);font-weight:600;}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-2px;height:3px;border-radius:2px;background:var(--brand);
}
.brandbar-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-pill);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);background:var(--surface-2);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand);}
.menu-toggle{display:none;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-lg{height:56px;padding:0 32px;font-size:17px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(22,87,216,.9);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--surface);color:var(--brand);border-color:rgba(22,87,216,.42);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-deep);transform:translateY(-2px);}
.btn-quiet{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.32);}
.btn-quiet:hover{background:rgba(255,255,255,.22);color:#fff;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);}
.link-arrow i{transition:transform .18s var(--ease);}
.link-arrow:hover i{transform:translateX(4px);}

/* channel bar */
.channelbar{background:var(--surface-2);border-top:1px solid var(--line);}
.channel-scroll{display:flex;align-items:center;gap:6px;min-height:50px;overflow-x:auto;scrollbar-width:none;}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel{
  position:relative;display:inline-flex;align-items:center;padding:9px 14px;
  font-size:14.5px;color:var(--text-2);font-weight:500;border-radius:var(--r-s);white-space:nowrap;
}
.channel:hover{background:var(--brand-soft);color:var(--brand);}
.channel.is-active{color:var(--brand);font-weight:600;}
.channel.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:2px;background:var(--brand);}

.mobile-drawer{display:none;border-top:1px solid var(--line);background:var(--surface);}
.mobile-drawer.is-open{display:block;}
.mobile-drawer ul{padding:8px 0 16px;}
.mobile-drawer a{display:block;padding:13px 24px;color:var(--text-2);font-size:15.5px;border-bottom:1px solid var(--line);}
.mobile-drawer a:last-child{border-bottom:0;}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600;background:var(--brand-soft);}

/* ============ hero ============ */
.cat-hero{
  position:relative;
  min-height:300px;
  display:flex;align-items:center;
  padding:48px 0;
  background-image:linear-gradient(100deg,rgba(245,248,252,.97) 0%,rgba(245,248,252,.92) 52%,rgba(232,240,254,.78) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(22,87,216,.06);box-shadow:0 0 0 48px rgba(22,87,216,.03);
  pointer-events:none;
}
.cat-hero .grid-container{position:relative;z-index:1;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--text-3);}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:0;
  max-width:820px;margin-bottom:16px;
}
.cat-hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{max-width:760px;font-size:16.5px;color:var(--text-2);line-height:1.85;}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.meta-pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:8px 16px;font-size:13.5px;color:var(--text-2);box-shadow:var(--sh-1);
}
.meta-pill b{color:var(--text);font-weight:600;}
.meta-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);}
.anchor-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.anchor-tabs a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.72);border:1px solid var(--line);
  font-size:14px;color:var(--text-2);
  transition:all .18s var(--ease);
}
.anchor-tabs a:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-2px);}

/* ============ section ============ */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--r-pill);
  padding:6px 14px;margin-bottom:16px;
}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:0;}
.section-desc{margin-top:14px;color:var(--text-2);font-size:16px;}
.title-rule{position:relative;padding-left:16px;}
.title-rule::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--brand);}
.section-head.center .title-rule{padding-left:0;}
.section-head.center .title-rule::before{display:none;}

/* ============ chips ============ */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);
  color:var(--text-2);font-size:14.5px;font-weight:500;
  transition:all .18s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(22,87,216,.9);}
.chip i{font-size:13px;}

/* ============ timeline ============ */
.record-wrap{display:block;}
.record-toolbar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;margin-bottom:32px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);
}
.record-toolbar .hint{font-size:14px;color:var(--text-3);display:inline-flex;align-items:center;gap:8px;}
.record-toolbar .hint i{color:var(--teal);}

.timeline{position:relative;}
.tl-item{
  display:grid;
  grid-template-columns:128px 44px minmax(0,1fr);
  align-items:start;
}
.tl-item.is-hidden{display:none;}
.tl-date{
  text-align:right;padding:6px 18px 0 0;
}
.tl-date .d{display:block;font-size:20px;font-weight:700;color:var(--text);line-height:1.2;}
.tl-date .y{display:block;font-size:12.5px;color:var(--text-3);letter-spacing:.02em;}
.tl-rail{position:relative;align-self:stretch;min-height:100%;}
.tl-rail::before{content:"";position:absolute;left:50%;margin-left:-1px;top:0;bottom:0;width:2px;background:var(--line);}
.tl-item:last-child .tl-rail::before{height:22px;bottom:auto;}
.tl-dot{
  position:absolute;left:50%;top:12px;transform:translateX(-50%);
  width:15px;height:15px;border-radius:50%;background:var(--surface);
  border:3px solid var(--brand);box-shadow:0 0 0 4px rgba(22,87,216,.08);
}
.tl-item.is-new .tl-dot{border-color:var(--amber);box-shadow:0 0 0 4px rgba(255,138,43,.14);}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  padding:24px;margin:0 0 28px 0;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-ghost);}
.tl-card-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:6px;}
.ver-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:16px;font-weight:700;color:#fff;background:var(--brand);
  padding:6px 16px;border-radius:var(--r-pill);font-variant-numeric:tabular-nums;
}
.tl-item.is-new .ver-badge{background:var(--brand-deep);}
.label-new{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;color:#fff;background:var(--amber);
  padding:4px 12px;border-radius:var(--r-pill);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--text-2);background:var(--surface-2);
  border:1px solid var(--line);padding:4px 12px;border-radius:var(--r-pill);
}
.tag.tag-teal{color:#0E7A6E;background:rgba(23,184,166,.12);border-color:rgba(23,184,166,.28);}
.tl-sub{font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.ver-list{margin-bottom:20px;}
.ver-list li{
  position:relative;padding-left:20px;font-size:15.5px;color:var(--text-2);
  margin-bottom:10px;line-height:1.8;
}
.ver-list li:last-child{margin-bottom:0;}
.ver-list li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--brand-soft);border:2px solid var(--brand);
}
.ver-list li b{color:var(--text);font-weight:600;}
.tl-foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;justify-content:space-between;
  padding-top:18px;border-top:1px dashed var(--line);
}
.pkg-info{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13.5px;color:var(--text-3);}
.pkg-info span b{color:var(--text-2);font-weight:600;}
.tl-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}

/* types block */
.split-block{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center;}
.type-list{display:grid;gap:18px;margin-top:8px;}
.type-item{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  padding:20px;box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.type-item:hover{transform:translateY(-2px);border-color:var(--brand-ghost);}
.type-no{
  width:52px;height:52px;border-radius:var(--r-m);
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;
}
.type-item h3{font-size:18px;font-weight:600;margin-bottom:6px;}
.type-item p{font-size:14.5px;color:var(--text-2);line-height:1.8;}
.media-figure{
  border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);
  background:var(--surface);box-shadow:var(--sh-1);
}
.media-figure img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.media-figure figcaption{padding:14px 18px;font-size:13.5px;color:var(--text-3);background:var(--surface);}

/* dark block */
.dark-block{
  background:var(--footer-bg);
  color:rgba(255,255,255,.86);
  padding:88px 0;
}
.dark-block .section-title{color:#fff;}
.dark-block .section-desc{color:rgba(255,255,255,.68);}
.dark-block .eyebrow{background:rgba(255,255,255,.12);color:#DCE8FF;}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:36px;}
.step{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-l);
  padding:28px 24px;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.step:hover{background:rgba(255,255,255,.1);transform:translateY(-2px);}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-m);
  background:rgba(23,184,166,.18);color:#7FE6DA;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.step h3{font-size:18px;color:#fff;font-weight:600;margin-bottom:10px;}
.step p{font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.85;}
.step code{
  display:inline-block;margin-top:12px;padding:6px 10px;border-radius:var(--r-s);
  background:rgba(0,0,0,.28);color:#B9D2FF;font-size:13px;
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  word-break:break-all;
}
.dark-note{
  margin-top:32px;padding:20px 24px;border-radius:var(--r-m);
  border:1px dashed rgba(255,255,255,.24);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  font-size:14.5px;color:rgba(255,255,255,.76);
}
.dark-note .callout{border:0;background:none;margin:0;padding:0;color:inherit;font-size:14.5px;}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);background:transparent;transition:background .2s var(--ease);}
.faq-item.is-open{background:var(--surface-3);box-shadow:inset 4px 0 0 var(--brand);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 20px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  min-height:44px;
}
.faq-q:hover{color:var(--brand);}
.faq-icon{width:20px;height:20px;position:relative;flex:0 0 20px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{left:2px;right:2px;top:9px;height:2px;}
.faq-icon::after{top:2px;bottom:2px;left:9px;width:2px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .22s var(--ease);}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{padding:0 20px 24px;font-size:15.5px;color:var(--text-2);line-height:1.9;max-width:760px;}

/* CTA + related */
.cta-band{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;margin-bottom:10px;}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.related{margin-top:56px;padding-top:40px;border-top:1px solid var(--line);}
.related h3{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--text);}
.related-chips{display:flex;flex-wrap:wrap;gap:12px;}
.related-chips a{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 20px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);
  color:var(--text-2);font-size:14.5px;font-weight:500;
  transition:all .18s var(--ease);
}
.related-chips a:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand);transform:translateY(-2px);}
.related-chips a i{color:var(--brand);font-size:13px;}

/* footer */
.site-footer{background:var(--footer-bg);color:rgba(255,255,255,.72);padding-top:72px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:16px;}
.footer-brand .brand-mark{width:24px;height:24px;flex:0 0 24px;color:#7FA8FF;}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(255,255,255,.68);max-width:360px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.72);display:inline-flex;align-items:center;gap:8px;font-size:13.5px;}
.to-top:hover{color:#fff;}

/* back to top floating */
.floating-dl{display:none;}

@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .section{padding:64px 0;}
  .dark-block{padding:64px 0;}
  .split-block{grid-template-columns:1fr;gap:32px;}
  .steps{grid-template-columns:1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cat-hero{min-height:0;padding:40px 0;}
  .brandbar-inner{min-height:64px;gap:16px;}
  .cta-band{padding:32px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .dark-block{padding:48px 0;}
  .tl-item{grid-template-columns:1fr;gap:0;}
  .tl-date{text-align:left;padding:0 0 10px 0;display:flex;align-items:baseline;gap:10px;}
  .tl-date .d{font-size:17px;}
  .tl-date .y{font-size:12px;}
  .tl-rail{display:none;}
  .tl-card{padding:20px;border-radius:var(--r-m);}
  .record-toolbar{padding:16px;flex-direction:column;align-items:flex-start;}
  .tl-foot{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .grid-container{padding:0 20px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
}
@media (max-width:520px){
  body{font-size:15.5px;}
  .brand{font-size:16.5px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .cta-actions{width:100%;flex-direction:column;}
  .tl-actions{width:100%;flex-direction:column;align-items:stretch;}
  .anchor-tabs a{font-size:13.5px;padding:8px 14px;}
  .chip{height:40px;padding:0 16px;font-size:14px;}
  .faq-q{font-size:15.5px;padding:18px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --c-primary:#1657D8;
  --c-primary-deep:#0E3E9E;
  --c-primary-light:#E8F0FE;
  --c-teal:#17B8A6;
  --c-amber:#FF8A2B;
  --c-bg:#F5F8FC;
  --c-card:#FFFFFF;
  --c-sub:#EEF3FA;
  --c-line:#DFE7F2;
  --c-text:#16233A;
  --c-text-2:#4E5F7A;
  --c-text-3:#8496B0;
  --c-footer:#0B1F44;
  --r-s:8px;
  --r-m:12px;
  --r-l:18px;
  --sh-1:0 1px 2px rgba(16,42,84,.06), 0 8px 24px -12px rgba(16,42,84,.14);
  --sh-2:0 2px 6px rgba(16,42,84,.09), 0 18px 40px -16px rgba(16,42,84,.24);
  --sec-y:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--c-bg);color:var(--c-text);
  font-family:var(--font-cn);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4{margin:0;color:var(--c-text);letter-spacing:0;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:0;}

.grid-container{max-width:1200px;width:100%;margin:0 auto;padding-left:24px;padding-right:24px;}
@media (min-width:1440px){.grid-container{max-width:1320px;}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(22,87,216,.3);}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 18px -10px rgba(14,62,158,.7);}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px -12px rgba(14,62,158,.7);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-deep);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-lg{min-height:56px;padding:0 34px;font-size:17px;}

.text-link{color:var(--c-primary);font-weight:600;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.text-link:hover{color:var(--c-primary-deep);}

/* ============ 头部 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow .2s ease-out;}
.site-header.is-stuck{box-shadow:var(--sh-1);}
.header-main-inner{display:flex;align-items:center;gap:28px;min-height:72px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-text);font-weight:700;font-size:18px;flex:0 0 auto;}
.brand:hover{color:var(--c-primary-deep);}
.brand-name{white-space:nowrap;}
.brand-mark{width:24px;height:24px;color:var(--c-primary);flex:0 0 24px;}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;min-width:0;}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  border-radius:var(--r-s);color:var(--c-text-2);font-size:15px;font-weight:500;white-space:nowrap;
}
.main-nav a:hover{background:var(--c-primary-light);color:var(--c-primary-deep);}
.main-nav a.active{color:var(--c-primary-deep);font-weight:600;}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:2px;background:var(--c-primary);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:999px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.icon-btn:hover{background:var(--c-primary-light);color:var(--c-primary-deep);border-color:#C6D8F7;}
.icon-btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(22,87,216,.3);}
.header-actions .btn{min-height:44px;padding:0 20px;font-size:15px;}
.nav-toggle{display:none;}

.channel-bar{background:var(--c-sub);border-top:1px solid var(--c-line);}
.channel-bar .grid-container{display:flex;align-items:center;gap:8px;min-height:50px;overflow-x:auto;scrollbar-width:none;}
.channel-bar .grid-container::-webkit-scrollbar{display:none;}
.channel-bar a{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;
  font-size:14px;color:var(--c-text-2);white-space:nowrap;transition:background-color .18s ease-out,color .18s ease-out;
}
.channel-bar a:hover{background:var(--c-primary-light);color:var(--c-primary-deep);}
.channel-bar a.active{background:#fff;color:var(--c-primary-deep);font-weight:600;box-shadow:var(--sh-1);}
.channel-label{font-size:13px;color:var(--c-text-3);white-space:nowrap;padding-right:6px;}

.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--c-line);padding:12px 0 18px;}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{display:block;padding:12px 4px;font-size:16px;color:var(--c-text);border-bottom:1px solid var(--c-line);}
.mobile-drawer a:last-child{border-bottom:0;}
.mobile-drawer a.active{color:var(--c-primary-deep);font-weight:600;}

/* ============ 分类页小 Hero ============ */
.cat-hero{position:relative;padding:58px 0 44px;background-color:var(--c-bg);background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:right center;overflow:hidden;}
.cat-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(245,248,252,.97) 0%,rgba(245,248,252,.9) 48%,rgba(245,248,252,.62) 100%);}
.cat-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-3);margin-bottom:18px;}
.breadcrumb a{color:var(--c-text-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#B9C6DA;}
.breadcrumb .current{color:var(--c-text-3);}
.cat-hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.18;font-weight:700;max-width:820px;}
.cat-hero .hero-sub{margin-top:16px;max-width:760px;font-size:16.5px;line-height:1.85;color:var(--c-text-2);}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.fact-pill{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-1);font-size:13.5px;color:var(--c-text-2);
}
.fact-pill i{color:var(--c-teal);font-size:13px;}
.fact-pill b{font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--c-text);font-weight:700;}
.anchor-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.anchor-tabs a{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;border-radius:999px;
  background:rgba(255,255,255,.85);border:1px solid var(--c-line);color:var(--c-text-2);font-size:14px;font-weight:500;
}
.anchor-tabs a:hover{background:#fff;border-color:#BBD0F3;color:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-1);}

/* ============ 板块通用 ============ */
.section{padding:var(--sec-y) 0;}
.section-tint{background:var(--c-sub);}
.section-white{background:#fff;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.25;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--c-primary);font-weight:600;margin-bottom:10px;}
.section-head .eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--c-teal);}
.section-head p{color:var(--c-text-2);font-size:15.5px;max-width:620px;margin-top:10px;}
.section-more a{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-primary);}
.section-more a:hover{color:var(--c-primary-deep);}

/* ============ 筛选条 ============ */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.chip{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-text-2);font-size:14px;font-weight:500;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.chip:hover{border-color:#BBD0F3;color:var(--c-primary-deep);transform:translateY(-1px);}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 10px 20px -12px rgba(14,62,158,.8);}
.chip:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(22,87,216,.3);}
.filter-count{margin-left:auto;font-size:13.5px;color:var(--c-text-3);align-self:center;}
.filter-count b{font-family:var(--font-num);color:var(--c-text);}

/* ============ 教程卡三列不等高网格 ============ */
.tile-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:start;}
.tile{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.tile:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.28);}
.tile.is-hidden{display:none;}
.tile-media{position:relative;overflow:hidden;background:var(--c-sub);}
.tile-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease-out;}
.tile:hover .tile-media img{transform:scale(1.04);}
.tile:nth-child(3n+1) .tile-media{height:198px;}
.tile:nth-child(3n+2) .tile-media{height:252px;}
.tile:nth-child(3n+3) .tile-media{height:222px;}
.tile-duration{
  position:absolute;right:12px;top:12px;display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 10px;border-radius:999px;background:rgba(255,255,255,.94);
  color:var(--c-primary-deep);font-size:12.5px;font-weight:600;font-family:var(--font-num);font-variant-numeric:tabular-nums;
}
.tile-play{
  position:absolute;left:14px;bottom:14px;width:40px;height:40px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;font-size:14px;box-shadow:0 10px 20px -10px rgba(14,62,158,.9);
}
.tile-body{padding:24px;}
.tile-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1;
}
.badge-blue{background:var(--c-primary-light);color:var(--c-primary-deep);}
.badge-teal{background:rgba(23,184,166,.12);color:#0E8578;}
.badge-amber{background:rgba(255,138,43,.14);color:#B65A0C;}
.badge-gray{background:var(--c-sub);color:var(--c-text-2);}
.tile h3{font-size:18px;line-height:1.4;font-weight:600;}
.tile h3 a{color:var(--c-text);}
.tile h3 a:hover{color:var(--c-primary);}
.tile p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--c-text-2);}
.tile-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-3);
}
.tile-foot .go{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--c-primary);font-size:13.5px;}
.tile-foot .go:hover{color:var(--c-primary-deep);}

.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin-top:44px;}
.pager a,.pager span{
  display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;padding:0 14px;
  border-radius:var(--r-m);border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);font-size:14.5px;
}
.pager a:hover{border-color:#BBD0F3;color:var(--c-primary-deep);background:var(--c-primary-light);}
.pager .current{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}
.pager .disabled{color:#B9C6DA;cursor:not-allowed;}

/* ============ 学习路径 ============ */
.path-wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:32px;align-items:start;}
.panel{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:32px;}
.panel h3{font-size:20px;line-height:1.35;margin-bottom:6px;}
.panel .panel-note{font-size:14px;color:var(--c-text-3);margin-bottom:24px;}
.path-item{padding:16px 0;border-bottom:1px dashed var(--c-line);}
.path-item:last-child{border-bottom:0;padding-bottom:0;}
.path-top{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:15px;font-weight:600;color:var(--c-text);}
.path-top .percent{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:14px;color:var(--c-primary);}
.bar{height:8px;border-radius:999px;background:var(--c-sub);margin-top:12px;overflow:hidden;}
.bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-primary),var(--c-teal));}
.path-tip{margin-top:8px;font-size:13.5px;color:var(--c-text-3);}
.step-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--c-line);}
.step-list li:last-child{border-bottom:0;}
.step-no{
  flex:0 0 30px;width:30px;height:30px;border-radius:999px;background:var(--c-primary-light);color:var(--c-primary-deep);
  display:inline-flex;align-items:center;justify-content:center;font-size:13.5px;font-weight:700;font-family:var(--font-num);
}
.step-list strong{display:block;font-size:15px;font-weight:600;color:var(--c-text);}
.step-list span{display:block;font-size:13.5px;color:var(--c-text-2);margin-top:2px;}

/* ============ 评测维度 ============ */
.score-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.score-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:26px;}
.score-head{display:flex;align-items:center;justify-content:space-between;gap:14px;}
.score-head h4{font-size:17px;font-weight:600;}
.score-head .score-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--c-primary);}
.score-card .bar{margin-top:14px;}
.score-card p{margin-top:12px;font-size:13.5px;color:var(--c-text-2);}
.stars{color:var(--c-amber);font-size:13px;letter-spacing:2px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-l);box-shadow:var(--sh-1);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 24px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--c-text);line-height:1.6;
  transition:background-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-q:hover{background:#F7FAFE;}
.faq-q:focus-visible{outline:none;box-shadow:inset 0 0 0 3px rgba(22,87,216,.25);}
.faq-q .ico{flex:0 0 auto;color:var(--c-primary);font-size:15px;transition:transform .2s ease-out;}
.faq-item.is-open .faq-q{background:#F7FAFE;box-shadow:inset 4px 0 0 var(--c-primary);color:var(--c-primary-deep);}
.faq-item.is-open .faq-q .ico{transform:rotate(180deg);}
.faq-a{display:none;padding:0 24px 22px 24px;background:#F7FAFE;box-shadow:inset 4px 0 0 var(--c-primary);}
.faq-item.is-open .faq-a{display:block;}
.faq-a p{font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* ============ 相关分类 + CTA ============ */
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:44px;}
.related a{
  display:flex;align-items:center;gap:14px;padding:18px 20px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-m);box-shadow:var(--sh-1);color:var(--c-text);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.related a:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(22,87,216,.3);color:var(--c-primary-deep);}
.related .r-ico{
  flex:0 0 40px;width:40px;height:40px;border-radius:var(--r-m);background:var(--c-primary-light);
  color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;font-size:16px;
}
.related strong{display:block;font-size:15.5px;font-weight:600;}
.related span{display:block;font-size:13px;color:var(--c-text-3);margin-top:2px;}

.cta-band{
  background:var(--c-primary-deep);border-radius:var(--r-l);padding:48px 40px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h3{color:#fff;font-size:clamp(22px,2.4vw,28px);line-height:1.3;}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;margin-top:10px;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-band .btn-primary{background:#fff;color:var(--c-primary-deep);box-shadow:none;}
.cta-band .btn-primary:hover{background:#E8F0FE;color:var(--c-primary-deep);}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px;}
.footer-brand .brand-mark{color:#7FA8F0;}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);}
.footer-col h4{font-size:14.5px;color:#fff;font-weight:600;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.62);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.72);font-size:13px;}
.to-top:hover{color:#fff;}

/* ============ 返回顶部悬浮 ============ */
.float-top{
  position:fixed;right:24px;bottom:28px;z-index:70;width:48px;height:48px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-primary);box-shadow:var(--sh-2);
  display:inline-flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
}
.float-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--sec-y:64px;}
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-main-inner{gap:14px;min-height:64px;}
  .brand{font-size:16.5px;margin-right:auto;}
  .header-actions .btn{display:none;}
  .tile-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tile:nth-child(3n+1) .tile-media,
  .tile:nth-child(3n+2) .tile-media,
  .tile:nth-child(3n+3) .tile-media{height:210px;}
  .path-wrap{grid-template-columns:minmax(0,1fr);}
  .score-grid{grid-template-columns:minmax(0,1fr);}
  .related{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .cta-band{padding:36px 28px;}
  .cat-hero{height:auto;padding:44px 0 38px;}
}
@media (max-width:639px){
  :root{--sec-y:48px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .tile-grid{grid-template-columns:minmax(0,1fr);}
  .tile:nth-child(3n+1) .tile-media,
  .tile:nth-child(3n+2) .tile-media,
  .tile:nth-child(3n+3) .tile-media{height:200px;}
  .tile-body{padding:20px;}
  .panel{padding:22px;}
  .faq-q{padding:18px 18px;font-size:15.5px;}
  .faq-a{padding:0 18px 18px 18px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:30px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .float-top{right:16px;bottom:20px;}
  .filter-count{margin-left:0;width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .tile:hover{transform:none;}
}