/* roulang page: index */
:root{
  --bg:#0C0D10; --bg-2:#14171C; --bg-3:#1C2027; --line:#262B33;
  --text:#EDF1F5; --muted:#98A2B3;
  --primary:#14E0B8; --primary-ink:#04231D;
  --accent:#FF7A45; --warn:#FFC24B;
  --r-btn:10px; --r-card:14px; --r-panel:20px; --r-img:12px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.03);
  --shadow-btn:0 8px 24px rgba(20,224,184,.18);
  --ease:cubic-bezier(.2,.8,.2,1);
  --t:200ms cubic-bezier(.2,.8,.2,1);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary)}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:1.15em}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--mono)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}

/* ---------- 顶部提示条 ---------- */
.topbar{background:var(--bg-3);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.topbar strong{color:var(--text);font-weight:600}
.topbar-close{color:var(--muted);line-height:1;padding:4px 8px;border-radius:6px;transition:color var(--t),background var(--t)}
.topbar-close:hover{color:var(--primary);background:rgba(20,224,184,.1)}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(12,13,16,.96);border-bottom:1px solid var(--line)}
.brand-row{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.logo-mark{width:32px;height:32px;flex:none;display:grid;place-items:center;border:1px solid var(--primary);border-radius:9px;color:var(--primary);font-family:var(--mono);font-size:13px;font-weight:700}
.logo-text{font-size:17px}
.brand-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.search{position:relative;display:none;flex:1;max-width:340px;margin:0 auto}
.search input{width:100%;height:40px;background:var(--bg-3);border:1px solid var(--line);border-radius:999px;padding:0 16px 0 40px;font-size:14px;transition:border-color var(--t),box-shadow var(--t)}
.search input::placeholder{color:var(--muted)}
.search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(20,224,184,.14)}
.search .ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);display:flex}
@media (min-width:1024px){.search{display:block}}
.burger{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text);transition:border-color var(--t),color var(--t)}
.burger:hover{border-color:var(--primary);color:var(--primary)}
@media (min-width:1024px){.burger{display:none}}

/* ---------- 频道行 ---------- */
.channel-inner{display:flex;align-items:center;gap:8px;overflow-x:auto;padding:10px 16px;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
@media (min-width:768px){.channel-inner{padding:10px 24px}}
.chan{position:relative;flex:none;font-size:13px;letter-spacing:.06em;color:var(--muted);padding:6px 14px;border-radius:999px;border:1px solid transparent;transition:background var(--t),color var(--t),border-color var(--t)}
.chan:hover{background:var(--bg-3);color:var(--text)}
.chan.is-active{background:rgba(20,224,184,.12);color:var(--primary);border-color:rgba(20,224,184,.3)}
.chan.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:-11px;height:2px;border-radius:2px;background:var(--primary)}

/* ---------- 抽屉菜单 ---------- */
.drawer{position:fixed;inset:0;background:var(--bg);z-index:80;display:none;padding:20px 16px 40px;overflow-y:auto}
.drawer.is-open{display:block}
@media (min-width:1024px){.drawer{display:none!important}}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-nav{display:grid;gap:8px;margin-bottom:24px}
.drawer-nav a{padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2);font-size:15px;transition:border-color var(--t),color var(--t)}
.drawer-nav a:hover,.drawer-nav a.is-active{border-color:rgba(20,224,184,.4);color:var(--primary)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:transform var(--t),background var(--t),box-shadow var(--t),border-color var(--t),color var(--t)}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--shadow-btn)}
.btn-primary:hover{background:#22ecc4;color:var(--primary-ink);transform:translateY(-2px);box-shadow:0 10px 28px rgba(20,224,184,.28)}
.btn-primary:active{transform:translateY(0);background:#12c7a5}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow span{transition:transform var(--t)}
.link-arrow:hover span{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{position:relative;border-bottom:1px solid var(--line);background-image:linear-gradient(rgba(12,13,16,.88),rgba(12,13,16,.96)),url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center}
.hero-inner{display:grid;gap:44px;padding:52px 0 60px}
@media (min-width:1024px){.hero-inner{grid-template-columns:1.05fr .95fr;align-items:center;min-height:560px;padding:72px 0}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.06em;color:var(--primary);background:rgba(20,224,184,.1);border:1px solid rgba(20,224,184,.26);border-radius:999px;padding:5px 12px;margin-bottom:18px}
.hero h1{font-size:clamp(28px,4.2vw,44px);line-height:1.22;font-weight:800;letter-spacing:-.01em}
.hero-sub{margin-top:16px;font-size:15px;color:var(--muted);max-width:32em}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
@media (max-width:520px){.hero-cta .btn{width:100%}}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.hero-badges span{border:1px solid var(--line);border-radius:999px;padding:4px 12px;background:rgba(28,32,39,.6)}
.hero-visual{position:relative;padding-bottom:28px}
.hero-frame{position:relative;border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden;background:var(--bg-2);aspect-ratio:16/10;box-shadow:var(--shadow-card)}
.hero-frame img{width:100%;height:100%;object-fit:cover}
.hero-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,13,16,.05),rgba(12,13,16,.55))}
.frame-num{position:absolute;left:16px;top:16px;z-index:2;font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--accent);background:rgba(12,13,16,.82);border:1px solid var(--line);border-radius:999px;padding:4px 10px}
.hero-shot{position:absolute;right:12px;bottom:-6px;width:54%;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--bg-2);box-shadow:var(--shadow-card)}
.hero-shot img{aspect-ratio:4/3;object-fit:cover;width:100%}
.hero-shot .cap{font-size:12px;color:var(--muted);padding:8px 12px;font-family:var(--mono)}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;border-bottom:1px solid var(--line)}
@media (min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.sec-title{position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.01em;line-height:1.3}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary)}
.sec-title.accent::before{background:var(--accent)}
.sec-desc{margin-top:10px;padding-left:14px;font-size:14px;color:var(--muted);max-width:56em}
.num{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--accent)}

/* ---------- 价值区 ---------- */
.value-layout{display:grid;gap:32px}
@media (min-width:1024px){.value-layout{grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}}
.value-lead{font-size:15px;color:var(--muted);margin-top:14px}
.value-stat{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:26px}
.value-stat div{border:1px solid var(--line);background:var(--bg-2);border-radius:var(--r-card);padding:16px}
.value-stat b{display:block;font-family:var(--mono);font-size:22px;color:var(--primary)}
.value-stat small{color:var(--muted);font-size:13px}
.value-grid{display:grid;gap:20px}
@media (min-width:640px){.value-grid{grid-template-columns:1fr 1fr}}
.value-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);transition:border-color var(--t),transform var(--t)}
.value-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.value-card h3{font-size:18px;font-weight:700;margin:14px 0 8px}
.value-card p{font-size:14px;color:var(--muted)}
.value-ico{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;color:var(--primary)}

/* ---------- 轮播 ---------- */
.carousel{position:relative}
.track{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:6px}
.track::-webkit-scrollbar{display:none}
.slide{flex:0 0 84%;scroll-snap-align:start;border:1px solid var(--line);background:var(--bg-2);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:border-color var(--t)}
.slide:hover{border-color:rgba(20,224,184,.4)}
.slide img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line)}
.slide .cap{padding:14px 16px;font-size:14px;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:10px}
.slide .cap span{font-family:var(--mono);font-size:12px;color:var(--muted)}
@media (min-width:768px){.slide{flex:0 0 calc((100% - 20px)/2)}}
@media (min-width:1024px){.slide{flex:0 0 calc((100% - 40px)/3)}}
.car-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:24px}
.dots{display:flex;gap:8px}
.dot{width:8px;height:8px;border-radius:999px;background:var(--line);transition:background var(--t),width var(--t)}
.dot.is-active{background:var(--primary);width:22px}
.car-nav{display:flex;gap:10px}
.car-btn{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--bg-2);color:var(--text);transition:border-color var(--t),color var(--t),transform var(--t)}
.car-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}

/* ---------- 系统要求 ---------- */
.tabs{display:inline-flex;gap:4px;background:var(--bg-3);border:1px solid var(--line);border-radius:999px;padding:4px}
.tab{height:36px;padding:0 18px;border-radius:999px;font-size:14px;color:var(--muted);transition:background var(--t),color var(--t)}
.tab:hover{color:var(--text)}
.tab.is-active{background:var(--primary);color:var(--primary-ink);font-weight:600}
.spec-panel{margin-top:26px;border:1px solid var(--line);background:var(--bg-2);border-radius:var(--r-card);padding:8px 24px;box-shadow:var(--shadow-card)}
.spec-row{display:grid;gap:6px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--muted);font-size:14px}
.spec-row dd{margin:0;font-family:var(--mono);font-size:14px;color:var(--text)}
@media (min-width:640px){.spec-row{grid-template-columns:220px 1fr;align-items:center;gap:20px}}
.spec-panel[hidden]{display:none}

/* ---------- 评价墙 ---------- */
.reviews{display:grid;gap:20px}
@media (min-width:1024px){.reviews{grid-template-columns:1fr 1fr;gap:24px;align-items:start}}
.review-col{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.review-col:nth-child(2){margin-top:44px}}
.review-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-card);transition:border-color var(--t),transform var(--t)}
.review-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:38px;height:38px;flex:none;border-radius:10px;display:grid;place-items:center;background:rgba(20,224,184,.12);color:var(--primary);font-weight:700;font-family:var(--mono)}
.review-name{font-size:15px;font-weight:600}
.stars{color:var(--warn);font-size:13px;letter-spacing:.1em}
.review-card p{font-size:14px;color:var(--muted)}
.review-date{margin-top:12px;font-family:var(--mono);font-size:12px;color:var(--muted)}

/* ---------- 下载 ---------- */
.dl-head{margin-bottom:28px}
.dl-grid{display:grid;gap:16px;margin-top:22px}
@media (min-width:640px){.dl-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.dl-grid{grid-template-columns:repeat(4,1fr)}}
.dl-card{border:1px solid var(--line);background:var(--bg-2);border-radius:var(--r-card);padding:22px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-card);transition:border-color var(--t),transform var(--t)}
.dl-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.dl-card h3{font-size:17px;font-weight:700}
.dl-meta{font-family:var(--mono);font-size:12px;color:var(--muted);display:grid;gap:4px}
.dl-note{font-size:13px;color:var(--muted);margin-top:18px}
.dl-note a{color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;gap:20px}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.news-card{display:flex;flex-direction:column;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:border-color var(--t),transform var(--t)}
.news-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px}
.badge{display:inline-block;font-size:12px;letter-spacing:.06em;padding:3px 10px;border-radius:999px;background:rgba(20,224,184,.12);color:var(--primary)}
.badge.alt{background:rgba(255,122,69,.14);color:var(--accent)}
.news-meta time{font-family:var(--mono);font-size:12px;color:var(--muted)}
.news-title{font-size:17px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body .link-arrow{margin-top:auto}
.empty-state{padding:48px 20px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);background:var(--bg-2)}
.empty-state svg{color:var(--muted);margin:0 auto 14px}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:16px}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;padding:20px 2px;font-size:16px;font-weight:600;color:var(--text);transition:color var(--t)}
.faq-q:hover{color:var(--primary)}
.faq-ico{position:relative;width:16px;height:16px;flex:none;color:var(--muted)}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-ico::before{left:0;right:0;top:7px;height:2px}
.faq-ico::after{top:0;bottom:0;left:7px;width:2px;transition:transform var(--t)}
.faq-item.is-open .faq-ico{color:var(--primary)}
.faq-item.is-open .faq-ico::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t)}
.faq-a p{font-size:14px;color:var(--muted);padding:0 2px 22px;max-width:60em}

/* ---------- 底部 CTA ---------- */
.cta-band{background:var(--bg-3);border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:var(--r-panel);padding:28px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.cta-band h2{font-size:20px;font-weight:800}
.cta-band p{font-size:14px;color:var(--muted);margin-top:6px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding:56px 0 24px}
.foot-grid{display:grid;gap:32px}
@media (min-width:768px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}}
.foot-brand{font-size:14px;color:var(--muted)}
.foot-brand .logo-text{font-size:16px}
.foot-brand p{margin:14px 0 0}
.foot-title{font-size:12px;letter-spacing:.06em;color:var(--muted);margin-bottom:14px}
.foot-list{list-style:none;padding:0;margin:0;display:grid;gap:10px;font-size:14px}
.foot-list a{color:var(--text);opacity:.88}
.foot-list a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;opacity:1}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--muted)}

/* roulang page: article */
:root{
  --bg:#0C0D10;
  --bg-2:#14171C;
  --bg-3:#1C2027;
  --line:#262B33;
  --text:#EDF1F5;
  --muted:#98A2B3;
  --primary:#14E0B8;
  --primary-ink:#04231D;
  --accent:#FF7A45;
  --warn:#FFC24B;
  --r-btn:10px;
  --r-card:14px;
  --r-panel:20px;
  --r-pill:999px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.03);
  --shadow-btn:0 8px 24px rgba(20,224,184,.18);
  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:200ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15px;
  line-height:1.75;
  overflow-x:hidden;
}
@media (min-width:768px){body{font-size:16px}}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(20,224,184,.28)}
::-webkit-scrollbar{height:8px;width:8px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:#2E343D;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#3B424D}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}

/* 头部 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(12,13,16,.95);border-bottom:1px solid var(--line)}
.brand-row{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;gap:14px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em;flex:none}
.logo-mark{
  width:34px;height:34px;border-radius:9px;background:var(--primary);color:var(--primary-ink);
  display:inline-flex;align-items:center;justify-content:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:800;
}
.logo-text{font-size:16px;white-space:nowrap}
.search{
  display:none;flex:1;max-width:400px;align-items:center;gap:8px;
  background:var(--bg-3);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:0 14px;height:40px;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.search .ico{color:var(--muted);display:inline-flex}
.search input{flex:1;background:transparent;border:0;outline:none;font-size:14px;min-width:0}
.search input::placeholder{color:var(--muted)}
.search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(20,224,184,.14)}
.brand-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.burger:hover{border-color:var(--primary);color:var(--primary)}
@media (min-width:1024px){
  .search{display:flex}
  .burger{display:none}
}
.channel-row{border-top:1px solid rgba(255,255,255,.02)}
.channel-inner{
  display:flex;gap:8px;overflow-x:auto;padding-top:10px;padding-bottom:10px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none}
.chan{
  position:relative;flex:none;padding:8px 14px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.06em;color:var(--muted);
  border:1px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chan:hover{background:rgba(255,255,255,.05);color:var(--text)}
.chan.is-active{background:rgba(20,224,184,.12);color:var(--primary);border-color:rgba(20,224,184,.26)}
.chan.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--primary);border-radius:2px}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:120;background:var(--bg);
  padding:18px 16px 32px;display:none;overflow-y:auto;
}
.drawer.open{display:block}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin:20px 0 24px}
.drawer-nav a{
  padding:14px 12px;border-radius:var(--r-card);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.drawer-nav a:hover{background:var(--bg-2);border-color:var(--line)}
.drawer .btn{width:100%}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
  font-weight:700;font-size:15px;padding:12px 20px;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),
             border-color var(--dur) var(--ease),color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--shadow-btn)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 10px 28px rgba(20,224,184,.28)}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.06em;font-weight:600;
}
.badge-primary{background:rgba(20,224,184,.12);color:var(--primary)}
.badge-accent{background:rgba(255,122,69,.14);color:var(--accent)}

/* 面包屑 */
.page{padding:28px 0 56px}
@media (min-width:1024px){.page{padding:40px 0 88px}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:26px}
.crumb a{color:var(--muted);transition:color var(--dur) var(--ease)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{opacity:.5}
.crumb .cur{color:var(--text);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章头 */
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line)}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.article-head h1{font-size:clamp(28px,4.2vw,44px);line-height:1.22;font-weight:800;letter-spacing:-.01em}
.head-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:18px;font-size:14px;color:var(--muted)}
.head-meta .mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}
.share-group{display:flex;gap:8px;align-items:center;margin-left:auto}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:transparent;color:var(--muted);font-size:12px;cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.share-btn:hover{border-color:var(--primary);color:var(--primary)}
.head-figure{margin:26px 0 0}
.head-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;border:1px solid var(--line)}
.head-figure figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}

/* 布局 */
.layout{display:grid;gap:36px;margin-top:32px}
@media (min-width:1024px){.layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px;margin-top:40px}}
.article-side{display:none}
@media (min-width:1024px){
  .article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;align-self:start}
}

/* 正文排版 */
.article-body{max-width:800px;font-size:16px;line-height:1.8;color:#E4E9EF;overflow-wrap:break-word}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;font-size:24px;line-height:1.35;font-weight:800;letter-spacing:-.01em;
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;background:var(--primary);border-radius:2px}
.article-body h3{font-size:20px;font-weight:700;margin:28px 0 12px;color:var(--text)}
.article-body h4{font-size:18px;font-weight:700;margin:22px 0 10px}
.article-body a{color:var(--text);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(20,224,184,.5)}
.article-body a:hover{color:var(--primary);text-decoration-color:var(--primary)}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.4em}
.article-body li{margin:.45em 0}
.article-body blockquote{
  background:var(--bg-3);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;
  padding:16px 20px;margin:24px 0;font-size:14px;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{width:100%;border-radius:12px;margin:24px 0;border:1px solid var(--line)}
.article-body figure{margin:24px 0}
.article-body figure img{margin:0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--bg-3);font-weight:700}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;
  background:var(--bg-3);border:1px solid var(--line);border-radius:6px;padding:1px 6px;
}
.article-body pre{
  background:var(--bg-3);border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:transparent;border:0;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:48px 20px;text-align:center;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);
}
.empty-state svg{color:var(--muted)}
.empty-state p{font-size:14px;color:var(--muted)}

/* 侧栏 */
.side-panel{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-card);
}
.side-title{font-size:12px;letter-spacing:.06em;color:var(--muted);font-weight:700;margin-bottom:14px}
.side-text{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:16px}
.side-btn{width:100%;margin-bottom:10px}
.side-btn:last-child{margin-bottom:0}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:8px 10px;border-left:2px solid var(--line);
  font-size:14px;color:var(--muted);line-height:1.5;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.toc-list a:hover{color:var(--text);border-color:rgba(20,224,184,.5)}
.toc-list a.active{color:var(--primary);border-color:var(--primary);background:rgba(20,224,184,.06)}
.collapse-toc{
  display:none;margin-top:32px;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--r-card);padding:16px 18px;
}
.collapse-toc summary{cursor:pointer;font-size:14px;font-weight:700;color:var(--text);list-style:none}
.collapse-toc summary::-webkit-details-marker{display:none}
.collapse-toc summary::after{content:"+";float:right;color:var(--primary);font-weight:700}
.collapse-toc[open] summary::after{content:"−"}
.collapse-toc .toc-list{margin-top:14px}
@media (max-width:1023px){.collapse-toc{display:block}}

/* 区块 */
.section{padding:34px 0}
@media (min-width:1024px){.section{padding:52px 0}}
.sec-head{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.sec-head .bar{width:4px;height:22px;background:var(--primary);border-radius:2px}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.01em}

/* 相关推荐 */
.rec-list{display:grid;gap:18px}
@media (min-width:768px){.rec-list{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rec-card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-card);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.rec-card:hover{transform:translateY(-2px);border-color:rgba(20,224,184,.4)}
.rec-card h3{font-size:16px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:13px;color:var(--muted)}
.rec-meta time{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}

/* CTA 条 */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  background:var(--bg-3);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-card);padding:24px;margin-top:14px;
}
.cta-bar p{font-size:16px;font-weight:700}
.cta-bar span.sub{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:6px}
.back-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-top:22px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:14px;font-weight:600}
.text-link svg{transition:transform var(--dur) var(--ease)}
.text-link:hover{color:var(--primary)}
.text-link:hover svg{transform:translateX(2px)}

/* 页脚 */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);margin-top:48px;padding:46px 0 24px}
.foot-grid{display:grid;gap:32px}
@media (min-width:640px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.6fr 1fr 1.3fr 1fr}}
.foot-brand p{font-size:14px;color:var(--muted);line-height:1.75;margin-top:14px;max-width:340px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;color:var(--muted)}
.foot-title{font-size:12px;letter-spacing:.06em;font-weight:700;margin-bottom:14px;color:var(--text)}
.foot-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.foot-list a{font-size:14px;color:var(--muted);transition:color var(--dur) var(--ease)}
.foot-list a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.foot-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--muted);
}
@media (max-width:519px){
  .share-group{margin-left:0;width:100%}
  .cta-bar{padding:20px}
  .cta-bar .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --bg:#0C0D10;
  --bg-2:#14171C;
  --bg-3:#1C2027;
  --line:#262B33;
  --text:#EDF1F5;
  --muted:#98A2B3;
  --primary:#14E0B8;
  --primary-ink:#04231D;
  --accent:#FF7A45;
  --warn:#FFC24B;
  --r-btn:10px;
  --r-card:14px;
  --r-panel:20px;
  --r-img:12px;
  --sh-card:0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.03);
  --sh-btn:0 8px 24px rgba(20,224,184,.18);
  --sh-btn-hover:0 8px 24px rgba(20,224,184,.28);
  --ease:200ms cubic-bezier(.2,.8,.2,1);
  --mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*,*::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:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:768px){ body{font-size:16px;} }
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover{color:var(--primary);}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
input{font:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(20,224,184,.28);}
::-webkit-scrollbar{height:8px;width:8px;}
::-webkit-scrollbar-track{background:var(--bg-2);}
::-webkit-scrollbar-thumb{background:#2C323B;border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:#3A424E;}

.container{max-width:1200px;margin:0 auto;padding:0 16px;width:100%;}
@media (min-width:768px){ .container{padding:0 24px;} }
.mono{font-family:var(--mono);}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(12,13,16,.96);border-bottom:1px solid var(--line);}
.brand-row{border-bottom:1px solid var(--line);}
.brand-inner{display:flex;align-items:center;gap:14px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.logo:hover{color:var(--text);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:var(--primary-ink);
  display:grid;place-items:center;font-family:var(--mono);font-size:13px;font-weight:800;letter-spacing:.02em;
  box-shadow:var(--sh-btn);flex:none;
}
.logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.search{display:none;}
@media (min-width:1024px){
  .search{
    display:flex;align-items:center;gap:8px;flex:1;max-width:340px;margin-left:12px;
    background:var(--bg-3);border:1px solid var(--line);border-radius:999px;padding:0 14px;height:38px;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(20,224,184,.14);}
  .search .ico{color:var(--muted);display:grid;place-items:center;}
  .search input{background:none;border:none;outline:none;color:var(--text);width:100%;font-size:13px;}
  .search input::placeholder{color:var(--muted);}
}
.brand-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.burger{
  width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;
  color:var(--text);transition:border-color var(--ease),color var(--ease);
}
.burger:hover{border-color:rgba(20,224,184,.4);color:var(--primary);}
@media (min-width:1024px){ .burger{display:none;} }

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:14px;padding:11px 20px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),color var(--ease),background-color var(--ease),opacity var(--ease);
  border:1px solid transparent;
}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--sh-btn);}
.btn-primary:hover{background:#1DEBC2;color:var(--primary-ink);transform:translateY(-2px);box-shadow:var(--sh-btn-hover);}
.btn-primary:active{transform:translateY(0);background:#12C7A4;}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent;}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 16px;font-size:13px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

.channel-row{border-bottom:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;gap:8px;overflow-x:auto;padding-top:10px;padding-bottom:10px;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.chan{
  position:relative;flex:none;font-size:12px;letter-spacing:.06em;color:var(--muted);
  padding:8px 14px;border-radius:999px;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease);
}
.chan:hover{background:rgba(255,255,255,.05);color:var(--text);}
.chan.is-active{background:rgba(20,224,184,.12);color:var(--primary);font-weight:600;}
.chan.is-active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:1px;
  width:22px;height:2px;border-radius:2px;background:var(--primary);
}
.channel-fade{position:relative;}
.channel-fade::after{
  content:"";position:absolute;right:0;top:0;bottom:0;width:36px;pointer-events:none;
  background:linear-gradient(90deg,rgba(12,13,16,0),rgba(12,13,16,.9));
}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--bg);display:none;flex-direction:column;
  padding:20px 16px 32px;overflow-y:auto;
}
.drawer.is-open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;color:var(--text);}
.drawer-close:hover{border-color:rgba(20,224,184,.4);color:var(--primary);}
.drawer-title{font-size:12px;letter-spacing:.06em;color:var(--muted);margin:18px 0 10px;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border:1px solid var(--line);
  border-radius:var(--r-card);background:var(--bg-2);margin-bottom:10px;font-size:15px;font-weight:600;
}
.drawer-link:hover{border-color:rgba(20,224,184,.4);color:var(--primary);}
.drawer-link.is-active{border-color:rgba(20,224,184,.5);color:var(--primary);background:rgba(20,224,184,.08);}

/* ---------- breadcrumb ---------- */
.crumb{padding:18px 0 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{opacity:.6;}
.crumb .cur{color:var(--text);font-weight:600;}

/* ---------- section ---------- */
.section{padding:64px 0;}
@media (min-width:1024px){ .section{padding:96px 0;} }
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.section-head::before{content:"";width:4px;height:26px;border-radius:2px;background:var(--primary);flex:none;}
.section-head h2{font-size:24px;}
@media (min-width:1024px){ .section-head h2{font-size:30px;} }
.lead{color:var(--muted);font-size:14px;max-width:660px;margin-bottom:32px;}
@media (min-width:1024px){ .lead{font-size:15px;} }

/* ---------- category hero ---------- */
.cat-hero{padding:28px 0 0;}
@media (min-width:1024px){ .cat-hero{padding:36px 0 0;} }
.cat-hero h1{font-size:clamp(28px,4.2vw,42px);font-weight:800;margin-bottom:14px;}
.cat-hero .sub{color:var(--muted);font-size:15px;max-width:680px;margin-bottom:22px;}
.hero-media{
  position:relative;border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden;
  aspect-ratio:16/9;background:var(--bg-3);
}
@media (min-width:1024px){ .hero-media{aspect-ratio:5/2;} }
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.72;}
.hero-media .tagline{
  position:absolute;left:18px;bottom:16px;display:flex;flex-wrap:wrap;gap:8px;
}
.hero-media .tagline span{
  font-size:12px;letter-spacing:.06em;padding:5px 12px;border-radius:999px;
  background:rgba(12,13,16,.82);border:1px solid var(--line);color:var(--text);
}
.hero-media .corner{
  position:absolute;top:14px;left:14px;font-family:var(--mono);font-size:12px;
  padding:4px 10px;border-radius:999px;background:rgba(12,13,16,.82);border:1px solid var(--line);color:var(--primary);
}

/* ---------- alt rows ---------- */
.alt-row{display:grid;gap:22px;align-items:center;margin-bottom:44px;}
.alt-row:last-child{margin-bottom:0;}
@media (min-width:1024px){
  .alt-row{grid-template-columns:1fr 1fr;gap:48px;margin-bottom:56px;}
  .alt-row.rev .alt-media{order:2;}
}
.alt-media{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--bg-3);
  aspect-ratio:4/3;position:relative;
}
.alt-media img{width:100%;height:100%;object-fit:cover;opacity:.78;}
.alt-media .idx{
  position:absolute;top:12px;left:12px;font-family:var(--mono);font-size:12px;color:var(--primary);
  background:rgba(12,13,16,.85);border:1px solid var(--line);border-radius:999px;padding:4px 10px;
}
.alt-body h3{font-size:19px;margin-bottom:10px;}
@media (min-width:1024px){ .alt-body h3{font-size:22px;} }
.alt-body p{color:var(--muted);font-size:14px;margin-bottom:14px;}
.alt-body ul{display:grid;gap:8px;}
.alt-body li{position:relative;padding-left:18px;font-size:14px;color:var(--text);}
.alt-body li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:2px;
  background:var(--primary);opacity:.9;
}

/* ---------- steps ---------- */
.steps{display:grid;gap:16px;}
@media (min-width:768px){ .steps{grid-template-columns:repeat(2,1fr);gap:20px;} }
@media (min-width:1024px){ .steps{grid-template-columns:repeat(4,1fr);} }
.step{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;
  box-shadow:var(--sh-card);transition:border-color var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px);}
.step .num{
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--accent);
  display:inline-block;padding:3px 9px;border-radius:999px;background:rgba(255,122,69,.14);margin-bottom:12px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{color:var(--muted);font-size:13.5px;}

/* ---------- download grid ---------- */
.dl-grid{display:grid;gap:16px;margin-top:28px;}
@media (min-width:768px){ .dl-grid{grid-template-columns:repeat(2,1fr);gap:20px;} }
.dl-card{
  display:block;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-card);transition:border-color var(--ease),transform var(--ease);
}
.dl-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px);color:var(--text);}
.dl-card .top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
.dl-card .plat{font-size:16px;font-weight:700;}
.dl-card .pill{
  font-size:12px;letter-spacing:.06em;padding:4px 10px;border-radius:999px;
  background:rgba(20,224,184,.12);color:var(--primary);font-family:var(--mono);
}
.dl-card .meta{display:grid;gap:6px;font-size:13px;color:var(--muted);}
.dl-card .meta b{color:var(--text);font-weight:600;font-family:var(--mono);}
.dl-more{margin-top:20px;font-size:14px;color:var(--muted);}
.dl-more a{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}

/* ---------- spec ---------- */
.tabs{display:inline-flex;gap:6px;background:var(--bg-3);border:1px solid var(--line);border-radius:999px;padding:5px;margin-bottom:24px;}
.tab{
  padding:8px 18px;border-radius:999px;font-size:13px;color:var(--muted);letter-spacing:.02em;
  transition:background-color var(--ease),color var(--ease);
}
.tab:hover{color:var(--text);}
.tab.is-active{background:rgba(20,224,184,.14);color:var(--primary);font-weight:600;}
.spec-panel{display:none;}
.spec-panel.is-active{display:block;}
.spec-box{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--bg-2);}
.spec-row{
  display:grid;grid-template-columns:1fr;gap:4px;padding:16px 20px;border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:none;}
.spec-row .k{color:var(--muted);font-size:13.5px;}
.spec-row .v{font-size:14px;font-family:var(--mono);color:var(--text);}
@media (min-width:768px){
  .spec-row{grid-template-columns:1.1fr 2fr;gap:20px;align-items:center;}
}

/* ---------- faq ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--bg-2);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
  padding:18px 20px;font-size:15.5px;font-weight:600;color:var(--text);
  transition:color var(--ease),background-color var(--ease);
}
.faq-q:hover{color:var(--primary);background:rgba(255,255,255,.02);}
.faq-icon{
  flex:none;width:22px;height:22px;border:1px solid var(--line);border-radius:6px;position:relative;
  transition:border-color var(--ease),transform var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:currentColor;border-radius:1px;
}
.faq-icon::before{width:10px;height:1.6px;}
.faq-icon::after{width:1.6px;height:10px;transition:opacity var(--ease);}
.faq-item.is-open .faq-icon{border-color:var(--primary);color:var(--primary);transform:rotate(180deg);}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{display:none;padding:0 20px 20px;color:var(--muted);font-size:14px;}
.faq-item.is-open .faq-a{display:block;}

/* ---------- cta ---------- */
.cta-bar{
  background:var(--bg-3);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-panel);padding:24px;display:flex;flex-wrap:wrap;gap:18px;
  align-items:center;justify-content:space-between;
}
.cta-bar h2{font-size:20px;margin-bottom:6px;}
.cta-bar p{color:var(--muted);font-size:13.5px;}
@media (min-width:1024px){ .cta-bar{padding:28px 32px;} .cta-bar h2{font-size:24px;} }

/* ---------- footer ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding:56px 0 28px;margin-top:8px;}
.foot-grid{display:grid;gap:32px;}
@media (min-width:768px){ .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px;} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:40px;} }
.foot-brand p{color:var(--muted);font-size:13.5px;margin-top:14px;max-width:340px;}
.foot-brand .mono{font-size:12.5px;color:#6E7787;margin-top:10px;}
.foot-title{font-size:12px;letter-spacing:.06em;color:var(--muted);margin-bottom:14px;text-transform:uppercase;}
.foot-list{display:grid;gap:10px;}
.foot-list a{font-size:14px;color:var(--text);border-bottom:2px solid transparent;padding-bottom:1px;}
.foot-list a:hover{color:var(--primary);border-bottom-color:var(--primary);}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;color:#6E7787;font-size:12.5px;
}
@media (max-width:640px){
  .cat-hero h1{font-size:26px;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
  .cta-bar .btn{width:100%;}
}

/* roulang page: category2 */
:root{
  --bg:#0C0D10;
  --bg-2:#14171C;
  --bg-3:#1C2027;
  --line:#262B33;
  --text:#EDF1F5;
  --muted:#98A2B3;
  --primary:#14E0B8;
  --primary-ink:#04231D;
  --accent:#FF7A45;
  --warn:#FFC24B;
  --r-btn:10px;
  --r-card:14px;
  --r-panel:20px;
  --r-img:12px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.03);
  --shadow-btn:0 8px 24px rgba(20,224,184,.18);
  --shadow-btn-hover:0 8px 24px rgba(20,224,184,.28);
  --ease:cubic-bezier(.2,.8,.2,1);
  --mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15px;
  line-height:1.75;
  letter-spacing:0;
}
@media (min-width:768px){ body{font-size:16px} }
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(20,224,184,.28)}
.mono{font-family:var(--mono);letter-spacing:-.02em}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){ .container{padding-left:24px;padding-right:24px} }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;white-space:nowrap;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
}
.btn-sm{min-height:38px;padding:0 14px;font-size:14px;border-radius:9px}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--shadow-btn)}
.btn-primary:hover{background:#3ce7c3;color:var(--primary-ink);transform:translateY(-2px);box-shadow:var(--shadow-btn-hover)}
.btn-primary:active{transform:translateY(0);background:#12c9a5}
.btn-outline{border-color:var(--line);background:transparent;color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:700;font-size:14px}
.btn-link svg{transition:transform .2s var(--ease)}
.btn-link:hover svg{transform:translateX(2px)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ---------- 页头 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(12,13,16,.96);border-bottom:1px solid var(--line)}
.brand-row{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;gap:14px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:9px;
  background:var(--primary);color:var(--primary-ink);
  font-weight:800;font-size:14px;letter-spacing:.02em;
}
.logo-text{font-weight:800;font-size:16px;letter-spacing:-.01em}
@media (min-width:768px){ .logo-text{font-size:17px} }
.search{
  display:none;align-items:center;gap:8px;
  flex:1 1 auto;max-width:360px;margin:0 8px;
  height:40px;padding:0 14px;
  background:var(--bg-3);border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search .ico{color:var(--muted);display:inline-flex}
.search input{flex:1;background:none;border:0;outline:none;color:var(--text);font-size:14px;min-width:0}
.search input::placeholder{color:var(--muted)}
.search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(20,224,184,.14)}
@media (min-width:1024px){ .search{display:flex} }
.brand-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--line);border-radius:9px;color:var(--text);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.burger:hover{border-color:var(--primary);color:var(--primary)}
@media (min-width:1024px){ .burger{display:none} }

.channel-row{background:var(--bg)}
.channel-inner{
  display:flex;align-items:center;gap:8px;
  padding-top:9px;padding-bottom:11px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none}
.chan{
  position:relative;flex:0 0 auto;
  padding:6px 14px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;color:var(--muted);
  border:1px solid transparent;white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.chan:hover{color:var(--text);background:var(--bg-3)}
.chan.is-active{color:var(--primary);background:rgba(20,224,184,.12);border-color:rgba(20,224,184,.28)}
.chan.is-active::after{
  content:"";position:absolute;left:50%;bottom:-10px;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--primary);
}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  display:none;flex-direction:column;padding:18px 16px 28px;overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:12px;letter-spacing:.06em;color:var(--muted);margin:22px 0 10px}
.drawer-list{display:flex;flex-direction:column;gap:8px}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 16px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-2);font-weight:700;
}
.drawer-list a.is-active{border-color:rgba(20,224,184,.45);color:var(--primary)}
.drawer-close{
  width:38px;height:38px;border:1px solid var(--line);border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding:18px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:#4a525e}
.crumb .now{color:var(--text)}

/* ---------- 窄 Hero ---------- */
.page-hero{padding:28px 0 36px;border-bottom:1px solid var(--line)}
@media (min-width:1024px){ .page-hero{padding:48px 0 56px} }
.hero-grid{display:grid;gap:26px}
@media (min-width:1024px){ .hero-grid{grid-template-columns:1.02fr .98fr;gap:44px;align-items:center} }
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  background:rgba(255,122,69,.14);color:var(--accent);
}
.pill.mint{background:rgba(20,224,184,.12);color:var(--primary)}
h1.page-title{
  font-size:clamp(28px,4.2vw,42px);
  margin:16px 0 12px;
}
.hero-sub{color:var(--muted);font-size:15px;max-width:520px}
@media (min-width:768px){ .hero-sub{font-size:16px} }
.hero-actions{display:flex;flex-direction:column;gap:12px;margin-top:24px}
@media (min-width:520px){ .hero-actions{flex-direction:row;flex-wrap:wrap} }
.hero-facts{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.fact{
  font-family:var(--mono);font-size:12px;color:var(--muted);
  padding:5px 10px;border:1px solid var(--line);border-radius:999px;background:var(--bg-2);
}
.media-frame{
  position:relative;border:1px solid var(--line);border-radius:var(--r-img);
  overflow:hidden;background:var(--bg-2);aspect-ratio:16/9;
}
.media-frame.wide{aspect-ratio:5/2}
.media-frame img{width:100%;height:100%;object-fit:cover}
.frame-tag{
  position:absolute;left:12px;top:12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  padding:4px 9px;border-radius:8px;
  background:var(--bg);border:1px solid var(--line);color:var(--primary);
}

/* ---------- 区块 ---------- */
.section{padding:56px 0}
@media (min-width:1024px){ .section{padding:88px 0} }
.section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:26px}
.sec-title{position:relative;padding-left:14px;font-size:28px}
@media (min-width:1024px){ .sec-title{font-size:31px} }
.sec-title::before{content:"";position:absolute;left:0;top:.28em;bottom:.24em;width:4px;border-radius:2px;background:var(--primary)}
.sec-desc{color:var(--muted);font-size:14px;max-width:560px;margin-top:8px}
.sec-title + .sec-desc{margin-top:10px}

/* ---------- 标签切换 ---------- */
.tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;margin-bottom:24px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;padding:9px 16px;border-radius:999px;
  border:1px solid var(--line);color:var(--muted);
  font-size:14px;font-weight:700;white-space:nowrap;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.tab:hover{color:var(--text);border-color:rgba(20,224,184,.35)}
.tab.is-active{color:var(--primary);background:rgba(20,224,184,.12);border-color:rgba(20,224,184,.45)}
.panel{display:none}
.panel.is-active{display:block;animation:fadeUp .28s var(--ease)}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.panel-grid{display:grid;gap:24px}
@media (min-width:1024px){ .panel-grid{grid-template-columns:1fr 1fr;gap:34px;align-items:start} }
.panel-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.panel-card h3{font-size:22px;margin-bottom:10px}
.panel-card > p{color:var(--muted);font-size:15px}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px}
.check-list .dot{
  flex:0 0 auto;margin-top:5px;width:16px;height:16px;border-radius:5px;
  border:1px solid rgba(20,224,184,.45);background:rgba(20,224,184,.12);
  display:inline-flex;align-items:center;justify-content:center;color:var(--primary);
}
.check-list b{font-weight:700}
.check-list span.note{color:var(--muted)}

/* ---------- 对照卡 ---------- */
.compare{display:grid;gap:20px}
@media (min-width:768px){ .compare{grid-template-columns:1fr 1fr} }
.cmp-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-card);transition:border-color .2s var(--ease),transform .2s var(--ease)}
.cmp-card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.cmp-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.cmp-head h3{font-size:18px}
.cmp-head .tag{font-size:12px;letter-spacing:.06em;color:var(--accent);background:rgba(255,122,69,.14);padding:4px 10px;border-radius:999px}
.meter{margin-top:18px}
.meter-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:14px;margin-bottom:7px}
.meter-row .val{font-family:var(--mono);color:var(--primary);font-size:13px}
.bar-track{height:8px;border-radius:999px;background:var(--bg-3);overflow:hidden}
.bar-fill{height:100%;border-radius:999px;background:var(--primary)}
.bar-fill.alt{background:var(--accent)}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;gap:20px}
@media (min-width:768px){ .scene-grid{grid-template-columns:1fr 1fr} }
@media (min-width:1024px){ .scene-grid{grid-template-columns:repeat(3,1fr)} }
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-card);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.card:hover{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.card .num{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--accent);margin-bottom:14px;display:block}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}
.card .cover{margin-top:16px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;background:var(--bg-3)}
.card .cover img{width:100%;height:100%;object-fit:cover}

/* ---------- 反馈摘录 ---------- */
.quote-grid{display:grid;gap:20px}
@media (min-width:1024px){ .quote-grid{grid-template-columns:repeat(2,1fr)} }
.quote{background:var(--bg-2);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--r-card);padding:22px}
.quote p{font-size:15px}
.quote .who{display:flex;align-items:center;gap:10px;margin-top:16px}
.avatar{width:34px;height:34px;border-radius:10px;background:rgba(20,224,184,.14);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.who .name{font-size:14px;font-weight:700}
.who .meta{font-size:12px;color:var(--muted);font-family:var(--mono)}
.stars{display:flex;gap:3px;color:var(--warn);margin-bottom:12px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 2px;text-align:left;font-size:16px;font-weight:600;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-q .sign{position:relative;flex:0 0 auto;width:18px;height:18px;color:var(--muted);transition:transform .25s var(--ease),color .2s var(--ease)}
.faq-q .sign::before,.faq-q .sign::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-q .sign::before{left:0;top:8px;width:18px;height:2px}
.faq-q .sign::after{left:8px;top:0;width:2px;height:18px;transition:opacity .25s var(--ease)}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-item.is-open .faq-q .sign{color:var(--primary);transform:rotate(180deg)}
.faq-item.is-open .faq-q .sign::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 2px 22px;color:var(--muted);font-size:14px;max-width:820px}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;flex-direction:column;gap:18px;
  background:var(--bg-3);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--r-panel);padding:26px;
}
@media (min-width:768px){ .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:30px 32px} }
.cta-bar h2{font-size:22px}
.cta-bar p{color:var(--muted);font-size:14px;margin-top:6px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg);padding:52px 0 24px;margin-top:8px}
.foot-grid{display:grid;gap:32px}
@media (min-width:768px){ .foot-grid{grid-template-columns:1fr 1fr} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px} }
.foot-brand p{color:var(--muted);font-size:14px;margin-top:14px;max-width:340px}
.foot-brand .mono{font-size:12px;color:#7c8798;margin-top:12px}
.foot-title{font-size:12px;letter-spacing:.06em;color:var(--muted);margin-bottom:14px}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a{font-size:14px;color:#c7ced8;text-decoration:underline;text-decoration-color:transparent;text-underline-offset:2px;transition:color .2s var(--ease),text-decoration-color .2s var(--ease)}
.foot-list a:hover{color:var(--primary);text-decoration-color:var(--primary)}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}

/* roulang page: category3 */
:root{
  --bg:#0C0D10;
  --bg-2:#14171C;
  --bg-3:#1C2027;
  --line:#262B33;
  --text:#EDF1F5;
  --muted:#98A2B3;
  --primary:#14E0B8;
  --primary-ink:#04231D;
  --accent:#FF7A45;
  --warn:#FFC24B;
  --r-btn:10px;
  --r-card:14px;
  --r-panel:20px;
  --r-img:12px;
  --sh-card:0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.03);
  --sh-btn:0 8px 24px rgba(20,224,184,.18);
  --sh-btn-hover:0 10px 28px rgba(20,224,184,.28);
  --ease:cubic-bezier(.2,.8,.2,1);
  --t:200ms cubic-bezier(.2,.8,.2,1);
  --font:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::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:var(--font);font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color var(--t),border-color var(--t)}
a:hover{color:var(--primary)}
button{font-family:inherit;font-size:inherit;border:0;background:none;color:inherit;cursor:pointer}
input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(20,224,184,.28);color:#fff}
body ::-webkit-scrollbar{height:8px;width:8px}
body ::-webkit-scrollbar-track{background:var(--bg-3)}
body ::-webkit-scrollbar-thumb{background:#333A45;border-radius:8px}
body ::-webkit-scrollbar-thumb:hover{background:var(--primary)}

body .container{width:100%;max-width:1200px;margin-left:auto;margin-right:auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){body .container{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){body{font-size:16px}}

.mono{font-family:var(--mono);letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(12,13,16,.95);border-bottom:1px solid var(--line)}
.brand-row{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;gap:16px;min-height:64px;padding-top:8px;padding-bottom:8px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;background:var(--primary);color:var(--primary-ink);font-family:var(--mono);font-size:13px;font-weight:800;letter-spacing:0}
.logo-text{font-size:17px;white-space:nowrap}
.search{display:none;position:relative;flex:1;max-width:340px;margin-left:12px}
.search .ico{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);display:flex}
.search input{width:100%;height:40px;padding:0 14px 0 36px;background:var(--bg-3);border:1px solid var(--line);border-radius:999px;color:var(--text);transition:border-color var(--t),box-shadow var(--t)}
.search input::placeholder{color:var(--muted)}
.search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(20,224,184,.14)}
.brand-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.burger{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text);transition:border-color var(--t),color var(--t)}
.burger:hover{border-color:var(--primary);color:var(--primary)}
.channel-row{border-bottom:1px solid var(--line);background:var(--bg)}
.channel-inner{display:flex;gap:8px;align-items:center;overflow-x:auto;padding-top:8px;padding-bottom:8px;scrollbar-width:none;-ms-overflow-style:none}
.channel-inner::-webkit-scrollbar{display:none}
.chan{position:relative;flex:0 0 auto;padding:8px 14px;border-radius:999px;font-size:12px;letter-spacing:.06em;color:var(--muted);white-space:nowrap;transition:background var(--t),color var(--t)}
.chan:hover{background:var(--bg-3);color:var(--text)}
.chan.is-active{background:rgba(20,224,184,.12);color:var(--primary)}
.chan.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--primary)}
@media (min-width:1024px){
  .search{display:block}
  .logo-text{font-size:19px}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t);white-space:nowrap}
.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:var(--sh-btn)}
.btn-primary:hover{background:#22EFC6;color:var(--primary-ink);transform:translateY(-2px);box-shadow:var(--sh-btn-hover)}
.btn-primary:active{transform:translateY(0);background:#12C9A5}
.btn-outline{border:1px solid var(--line);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow svg{transition:transform var(--t)}
.link-arrow:hover svg{transform:translateX(2px)}

/* ---------- hero ---------- */
.page-hero{position:relative;border-bottom:1px solid var(--line);background:var(--bg-2);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(12,13,16,.86),rgba(12,13,16,.94)),url("/assets/images/backpic/back-3.png");background-size:cover;background-position:center;opacity:.9}
.page-hero .container{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);padding-top:20px}
.crumb .sep{opacity:.5}
.crumb a:hover{color:var(--primary)}
.hero-grid{display:grid;grid-template-columns:1fr;gap:28px;padding-top:24px;padding-bottom:40px}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.05fr .95fr;align-items:center;gap:48px;padding-top:36px;padding-bottom:64px}
}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;background:rgba(255,122,69,.14);color:var(--accent);font-size:12px;letter-spacing:.06em;font-weight:600}
.tag.is-primary{background:rgba(20,224,184,.12);color:var(--primary)}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.25;font-weight:800;letter-spacing:-.01em;margin-top:16px}
.hero-sub{margin-top:14px;font-size:16px;color:var(--muted);max-width:56ch}
.hero-actions{display:flex;flex-direction:column;gap:12px;margin-top:26px}
@media (min-width:640px){.hero-actions{flex-direction:row;flex-wrap:wrap}}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;font-size:12px;color:var(--muted);background:var(--bg-3)}
.chip b{color:var(--text);font-family:var(--mono);font-weight:600}
.hero-visual{position:relative;border:1px solid var(--line);border-radius:var(--r-panel);background:var(--bg-3);overflow:hidden;box-shadow:var(--sh-card)}
.hero-visual .ratio{position:relative;aspect-ratio:16/9;background:var(--bg-3)}
.hero-visual .ratio img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-visual .badge-num{position:absolute;top:14px;left:14px;display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:rgba(12,13,16,.9);border:1px solid var(--line);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.hero-visual .badge-num b{font-family:var(--mono);color:var(--primary)}

/* ---------- section base ---------- */
.section{padding-top:56px;padding-bottom:56px;border-bottom:1px solid var(--line)}
@media (min-width:1024px){.section{padding-top:88px;padding-bottom:88px}}
.section:last-of-type{border-bottom:0}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.sec-title{position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.01em;line-height:1.3}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary)}
.sec-desc{margin-top:10px;color:var(--muted);font-size:14px;max-width:60ch}
.sec-head .tag{margin-bottom:6px}

/* ---------- version badge card ---------- */
.ver-card{display:grid;grid-template-columns:1fr;gap:24px;padding:24px;border:1px solid var(--line);border-radius:var(--r-panel);background:var(--bg-2);box-shadow:var(--sh-card)}
@media (min-width:1024px){.ver-card{grid-template-columns:320px 1fr;gap:32px;padding:32px}}
.ver-main{border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-3);padding:20px}
.ver-main .label{font-size:12px;letter-spacing:.06em;color:var(--muted)}
.ver-main .num{margin-top:8px;font-family:var(--mono);font-size:34px;font-weight:700;color:var(--primary);line-height:1.1}
.ver-main .meta{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);display:grid;gap:8px}
.ver-main .meta span b{color:var(--text);font-family:var(--mono);font-weight:600}
.ver-list{display:grid;gap:14px}
.ver-list li{display:flex;gap:12px;font-size:15px;color:var(--text)}
.ver-list li .dot{flex:0 0 auto;margin-top:4px;color:var(--primary)}
.ver-list li span.note{display:block;color:var(--muted);font-size:14px;margin-top:2px}
.ver-actions{display:flex;flex-direction:column;gap:12px;margin-top:22px}
@media (min-width:640px){.ver-actions{flex-direction:row;flex-wrap:wrap}}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;left:13px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-item{position:relative;display:grid;grid-template-columns:1fr;gap:10px;padding-left:44px;padding-bottom:26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:7px;top:8px;width:13px;height:13px;border-radius:50%;background:var(--bg);border:2px solid var(--primary)}
.tl-item.is-past::before{border-color:var(--line)}
.tl-time{font-family:var(--mono);font-size:13px;color:var(--muted);letter-spacing:.02em}
.tl-body{border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2);padding:20px;box-shadow:var(--sh-card);transition:border-color var(--t),transform var(--t)}
.tl-item:hover .tl-body{border-color:rgba(20,224,184,.4);transform:translateY(-2px)}
.tl-body h3{font-size:18px;font-weight:700;letter-spacing:-.01em;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tl-body h3 .ver{font-family:var(--mono);color:var(--primary)}
.tl-body p{margin-top:10px;font-size:14px;color:var(--muted)}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tl-tags .mini{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;border:1px solid var(--line);font-size:12px;color:var(--muted)}
.tl-tags .mini.is-accent{border-color:rgba(255,122,69,.4);color:var(--accent)}
@media (min-width:768px){
  .tl-item{grid-template-columns:110px 1fr;gap:20px;padding-left:44px;align-items:flex-start}
  .tl-time{text-align:right;padding-top:18px}
  .timeline::before{left:129px}
  .tl-item::before{left:123px}
}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;width:100%;text-align:left;padding:20px 0;font-size:16px;font-weight:600;color:var(--text);transition:color var(--t)}
.faq-q:hover{color:var(--primary)}
.faq-q .sign{flex:0 0 auto;position:relative;width:20px;height:20px;margin-top:3px}
.faq-q .sign::before,.faq-q .sign::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform var(--t),opacity var(--t)}
.faq-q .sign::before{left:0;right:0;top:9px;height:2px}
.faq-q .sign::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.is-open .faq-q .sign::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t)}
.faq-a p{padding:0 40px 22px 0;font-size:14px;color:var(--muted);line-height:1.8}
.faq-side{border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2);padding:22px;box-shadow:var(--sh-card)}
.faq-side h3{font-size:17px;font-weight:700}
.faq-side ul{margin-top:14px;display:grid;gap:10px;font-size:14px;color:var(--muted)}
.faq-side ul li{display:flex;gap:10px}
.faq-side ul li svg{flex:0 0 auto;margin-top:4px;color:var(--primary)}
.faq-side .btn{margin-top:18px}
.faq-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.faq-grid{grid-template-columns:1fr 320px;gap:40px;align-items:start}}

/* ---------- cta ---------- */
.cta-bar{margin-top:0;border-top:1px solid var(--line);background:var(--bg-3)}
.cta-inner{position:relative;display:flex;flex-direction:column;gap:18px;padding:32px 0 32px 20px}
.cta-inner::before{content:"";position:absolute;left:0;top:32px;bottom:32px;width:4px;border-radius:2px;background:var(--primary)}
.cta-inner h2{font-size:clamp(20px,2.4vw,26px);font-weight:800;letter-spacing:-.01em}
.cta-inner p{margin-top:8px;font-size:14px;color:var(--muted);max-width:58ch}
.cta-inner .actions{display:flex;flex-direction:column;gap:12px}
@media (min-width:768px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:36px 0 36px 22px}
  .cta-inner .actions{flex-direction:row;flex:0 0 auto}
}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding-top:48px;padding-bottom:24px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:768px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:36px}}
.foot-brand p{margin-top:14px;font-size:14px;color:var(--muted);max-width:34ch}
.foot-brand p.mono{font-family:var(--mono);font-size:12px;color:#6C7686;margin-top:10px}
.foot-title{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--text);margin-bottom:14px}
.foot-list{display:grid;gap:10px;font-size:14px;color:var(--muted)}
.foot-list a{border-bottom:2px solid transparent;padding-bottom:2px}
.foot-list a:hover{color:var(--primary);border-bottom-color:var(--primary)}
.foot-bottom{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--muted)}
@media (min-width:768px){.foot-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- mobile drawer ---------- */
.drawer{position:fixed;inset:0;z-index:100;background:var(--bg);padding:20px 16px 32px;overflow-y:auto;display:none}
.drawer.is-open{display:block}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn)}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer-nav{margin-top:20px;display:grid;gap:10px}
.drawer-nav a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2);font-size:15px}
.drawer-nav a:hover{border-color:rgba(20,224,184,.4);color:var(--primary)}
.drawer .btn{margin-top:20px}
.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}