/* roulang page: index */
:root{
  --ink-900:#0B211C;
  --ink-950:#071713;
  --ink-700:#12332B;
  --lime:#C8F14E;
  --lime-dim:#A9D22F;
  --lime-soft:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-hover:#D3441B;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --bg-alt:#EFEFE9;
  --text:#1A1F1D;
  --text-2:#5C6663;
  --text-3:#8A938F;
  --line:#E3E2DA;
  --line-dark:rgba(255,255,255,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol,dl,dd,figure{margin:0;padding:0}
ul,ol{list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.grid-container{max-width:1240px;padding-left:20px;padding-right:20px}
@media screen and (min-width:40em){.grid-container{padding-left:20px;padding-right:20px}}
.section{padding:clamp(56px,8vw,116px) 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--ink-900);color:#F7F6F2}
.section--dark .sec-sub,.section--dark .muted{color:rgba(247,246,242,.72)}
.sec-head{margin-bottom:clamp(28px,4vw,52px)}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--text-3);text-transform:uppercase;margin-bottom:14px}
.sec-kicker::before{content:"";width:18px;height:2px;background:var(--lime-dim);display:block}
.section--dark .sec-kicker{color:rgba(247,246,242,.6)}
h2{font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em;font-weight:800}
h3{font-size:22px;line-height:1.35;font-weight:700}
.sec-sub{margin-top:14px;max-width:720px;color:var(--text-2);font-size:16px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-900);position:relative}
.text-link span.arrow{transition:transform .28s var(--ease);display:inline-block}
.text-link:hover span.arrow{transform:translateX(4px)}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;background:var(--lime-dim);transition:width .28s var(--ease)}
.text-link:hover::after{width:100%}
.section--dark .text-link{color:#F7F6F2}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--ink-900);border-bottom:1px solid var(--line-dark);transition:background .32s var(--ease),box-shadow .32s var(--ease)}
.site-header.is-scrolled{background:rgba(11,33,28,.94);backdrop-filter:saturate(140%) blur(8px);box-shadow:0 12px 30px -24px rgba(0,0,0,.8)}
.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:#F7F6F2;font-weight:800;font-size:19px;letter-spacing:-.01em;white-space:nowrap}
.brand svg{width:30px;height:30px;flex:0 0 auto}
.brand em{font-style:normal;color:var(--lime)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{position:relative;display:block;padding:10px 12px;font-size:15px;color:rgba(247,246,242,.78);transition:color .2s var(--ease)}
.nav-menu a::after{content:"";position:absolute;left:50%;bottom:6px;transform:translateX(-50%);height:2px;width:0;background:var(--lime);transition:width .28s var(--ease)}
.nav-menu a:hover{color:#F7F6F2}
.nav-menu a:hover::after{width:calc(100% - 24px)}
.nav-menu a.is-active{color:var(--lime);font-weight:600}
.nav-menu a.is-active::after{width:calc(100% - 24px)}
.nav-menu a.is-active::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:16px;border-radius:2px;background:var(--lime)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 18px;border-radius:var(--r-btn);background:var(--orange);color:#fff;font-size:14px;font-weight:600;transition:background .2s var(--ease),transform .2s var(--ease)}
.nav-cta:hover{background:var(--orange-hover);transform:translateY(-2px)}
.burger{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.2);border-radius:10px;background:transparent;position:relative}
.burger i{position:absolute;left:11px;width:20px;height:2px;background:#F7F6F2;border-radius:2px;transition:transform .28s var(--ease),opacity .2s var(--ease),top .28s var(--ease)}
.burger i:nth-child(1){top:14px}
.burger i:nth-child(2){top:20px}
.burger i:nth-child(3){top:26px}
.burger.is-open i:nth-child(1){top:20px;transform:rotate(45deg)}
.burger.is-open i:nth-child(2){opacity:0}
.burger.is-open i:nth-child(3){top:20px;transform:rotate(-45deg)}
.drawer{position:fixed;top:0;right:0;bottom:0;width:84%;max-width:340px;background:var(--ink-900);z-index:95;transform:translateX(100%);transition:transform .32s var(--ease);padding:26px 22px;display:flex;flex-direction:column;border-left:1px solid var(--line-dark)}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line-dark)}
.drawer-close{background:transparent;border:1px solid rgba(255,255,255,.2);color:#F7F6F2;border-radius:10px;width:36px;height:36px;font-size:18px;line-height:1}
.drawer-nav{margin-top:6px}
.drawer-nav a{display:block;padding:16px 4px;font-size:18px;color:rgba(247,246,242,.85);border-bottom:1px solid var(--line-dark)}
.drawer-nav a.is-active{color:var(--lime);padding-left:12px;border-left:4px solid var(--lime)}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}
.scrim{position:fixed;inset:0;background:rgba(7,23,19,.6);opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);z-index:90}
.scrim.is-open{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease)}
.btn .arrow{transition:transform .28s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-hover)}
.btn-outline{border-color:rgba(255,255,255,.24);color:#F7F6F2;background:transparent}
.btn-outline:hover{border-color:var(--lime);color:var(--lime)}
.btn-dark{background:var(--ink-900);color:#F7F6F2}
.btn-dark:hover{background:var(--ink-700)}
.btn-ghost-dark{border-color:rgba(11,33,28,.24);color:var(--ink-900);background:transparent}
.btn-ghost-dark:hover{border-color:var(--ink-900);background:rgba(11,33,28,.06)}
.btn-lg{height:54px;padding:0 30px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink-900);color:#F7F6F2;overflow:hidden;display:flex;align-items:center;min-height:78vh;padding:clamp(44px,6vw,84px) 0 clamp(48px,7vw,92px)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:46px 46px}
.hero::after{content:"";position:absolute;right:-10%;bottom:-34%;width:640px;height:640px;pointer-events:none;background:radial-gradient(circle,rgba(200,241,78,.17),transparent 62%)}
.hero-inner{position:relative;z-index:2;width:100%}
.hero-tag{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:999px;background:var(--lime-soft);color:var(--lime);font-size:12px;letter-spacing:.06em;font-weight:600}
.hero h1{margin-top:20px;font-size:clamp(30px,4.6vw,56px);line-height:1.12;letter-spacing:-.02em;font-weight:900}
.hero h1 .hl{color:var(--lime)}
.hero-sub{margin-top:18px;max-width:540px;font-size:17px;line-height:1.75;color:rgba(247,246,242,.72)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-badges{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:24px}
.platform-badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid var(--line-dark);font-size:12px;letter-spacing:.04em;color:rgba(247,246,242,.85)}
.hero-meta{font-size:12.5px;color:rgba(247,246,242,.62);letter-spacing:0}
.hero-metrics{display:flex;flex-wrap:wrap;gap:34px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line-dark)}
.metric-num{display:block;font-size:26px;font-weight:700;color:#F7F6F2;line-height:1.2}
.metric-label{display:block;font-size:13px;color:rgba(247,246,242,.58);margin-top:4px}
.hero-visual{margin-top:44px}
.hero-figure{position:relative;border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.12);background:var(--ink-700)}
.hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-figure::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:30px 30px;mix-blend-mode:overlay;pointer-events:none}
.hero-arc{position:absolute;right:-40px;bottom:-80px;width:280px;height:280px;border-radius:50%;border:26px solid rgba(200,241,78,.16);pointer-events:none}
.float-card{position:absolute;left:16px;bottom:16px;z-index:3;background:rgba(7,23,19,.92);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:12px 16px;animation:floaty 6s ease-in-out infinite}
.float-card b{display:block;font-size:14px;color:#F7F6F2}
.float-card span{display:block;font-size:12px;color:rgba(247,246,242,.62);margin-top:2px}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ---------- 信任条 ---------- */
.trust{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:28px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-item{padding:4px 22px;border-left:1px solid var(--line);display:flex;align-items:center;gap:14px}
.trust-item:first-child{border-left:0;padding-left:0}
.trust-ico{width:32px;height:32px;border-radius:9px;background:var(--lime-soft);color:var(--ink-900);display:flex;align-items:center;justify-content:center;font-size:15px;flex:0 0 auto}
.trust-num{font-size:20px;font-weight:700;line-height:1.2}
.trust-desc{font-size:12px;color:var(--text-3);letter-spacing:.04em}

/* ---------- 轮播 ---------- */
.shots{background:var(--bg)}
.orbit{margin:0}
.orbit-container{border-radius:var(--r-card)}
.slide-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px}
.slide-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--bg-alt)}
.slide-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.slide-body h3{margin-bottom:12px}
.slide-body p{color:var(--text-2);font-size:15.5px}
.slide-list{margin-top:18px;display:grid;gap:8px}
.slide-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2)}
.slide-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--lime-dim)}
.orbit-bullets{display:flex;justify-content:center;gap:8px;margin-top:26px}
.orbit-bullets button{width:14px;height:3px;padding:0;border:0;border-radius:99px;background:#CFCFC6;transition:width .28s var(--ease),background .28s var(--ease)}
.orbit-bullets button.is-active{width:32px;background:var(--lime-dim)}
.orbit-previous,.orbit-next{width:46px;height:46px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;color:var(--ink-900);top:42%;display:flex;align-items:center;justify-content:center;transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.orbit-previous::before,.orbit-next::before{display:none}
.orbit-previous::after,.orbit-next::after{font-size:22px;font-weight:700;line-height:1}
.orbit-previous::after{content:"\2039"}
.orbit-next::after{content:"\203A"}
.orbit-previous:hover,.orbit-next:hover{background:var(--lime);border-color:var(--lime);transform:translateY(-2px)}

/* ---------- Bento ---------- */
.bento-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;height:100%;display:flex;flex-direction:column;transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease)}
.bento-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(11,33,28,.35)}
.bento-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);margin-bottom:22px}
.bento-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
.bento-card:hover .bento-media img{transform:scale(1.03)}
.bento-card p{color:var(--text-2);font-size:15px;margin-top:12px}
.bento-num{font-family:var(--mono);font-size:15px;color:var(--text-3);letter-spacing:.06em;margin-bottom:14px;transition:color .28s var(--ease)}
.bento-card:hover .bento-num{color:var(--orange)}
.bento-card h3{font-size:20px}
.bento-wide{flex-direction:row;align-items:center;gap:20px}
.bento-wide .bento-ico{width:46px;height:46px;border-radius:12px;background:var(--lime-soft);color:var(--ink-900);display:flex;align-items:center;justify-content:center;font-size:20px;flex:0 0 auto}
.bento-wide .bento-txt{flex:1}
.bento-wide .arrow{font-size:20px;color:var(--text-3);transition:transform .28s var(--ease),color .28s var(--ease)}
.bento-card:hover .arrow{transform:translateX(4px);color:var(--orange)}
.bento-card .text-link{margin-top:auto;padding-top:20px}

/* ---------- 系统要求 ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.req-card{border:1px solid var(--line-dark);border-radius:var(--r-card);padding:28px;background:rgba(255,255,255,.03)}
.req-plat{font-family:var(--mono);font-size:14px;letter-spacing:.08em;color:var(--lime);margin-bottom:18px;display:block}
.req-list{border-top:1px dotted rgba(255,255,255,.22)}
.req-list div{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px dotted rgba(255,255,255,.22);font-size:14.5px}
.req-list dt{color:rgba(247,246,242,.6)}
.req-list dd{color:#F7F6F2;font-family:var(--mono);text-align:right}
.req-note{margin-top:26px;font-size:13.5px;color:rgba(247,246,242,.62)}

/* ---------- 评价墙 ---------- */
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.quote-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;transition:transform .32s var(--ease),box-shadow .32s var(--ease)}
.quote-card:nth-child(even){transform:translateY(32px)}
.quote-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(11,33,28,.35)}
.quote-card:nth-child(even):hover{transform:translateY(28px)}
.stars{color:var(--orange);font-size:14px;letter-spacing:2px}
.quote-card p{margin-top:14px;font-size:15px;color:var(--text-2)}
.quote-foot{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px dotted var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--ink-900);color:var(--lime);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 auto}
.quote-name{font-size:14px;font-weight:600}
.chip{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--bg-alt);color:var(--text-2);font-size:12px;letter-spacing:.04em}
.quote-foot .chip{margin-left:auto}
.chip--lime{background:var(--lime);color:var(--ink-900);font-weight:600}
.chip--ink{background:var(--ink-900);color:#F7F6F2}

/* ---------- 下载条带 ---------- */
.download{background:var(--lime);color:var(--ink-900);padding:clamp(56px,7vw,92px) 0}
.download h2{color:var(--ink-900)}
.download .sec-sub{color:rgba(11,33,28,.72)}
.download-inner{display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:center}
.download-btns{display:flex;flex-wrap:wrap;gap:16px;margin-top:28px}
.qr-box{background:#fff;border-radius:12px;padding:12px;width:120px;box-shadow:0 12px 30px -22px rgba(11,33,28,.6)}
.qr-code{width:96px;height:96px;background-image:linear-gradient(90deg,var(--ink-900) 6px,transparent 6px),linear-gradient(var(--ink-900) 6px,transparent 6px);background-size:12px 12px;background-color:#fff;border:1px solid #E3E2DA}
.qr-note{font-size:12px;color:var(--text-2);margin-top:10px;line-height:1.6}
.dl-meta{margin-top:22px;font-size:12.5px;color:rgba(11,33,28,.7)}

/* ---------- 资讯列表 ---------- */
.post-card{display:flex;flex-direction:column;height:100%;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease)}
.post-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(11,33,28,.35);border-color:#D6D5CB}
.post-cover{overflow:hidden;background:var(--bg-alt);border-bottom:1px solid var(--line)}
.post-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.03)}
.post-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-body h3{font-size:18px;line-height:1.45;transition:color .24s var(--ease)}
.post-card:hover .post-body h3{color:var(--orange)}
.post-body p{font-size:14.5px;color:var(--text-2);line-height:1.75}
.post-meta{font-size:12.5px;color:var(--text-3);letter-spacing:.02em;margin-top:auto;display:flex;align-items:center;gap:10px}
.post-card--lead .post-body h3{font-size:23px}
.post-card--lead .post-cover img{aspect-ratio:16/9}
.post-list-mini{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;height:100%}
.mini-item{display:flex;gap:16px;padding:16px 20px;border-bottom:1px solid var(--line);transition:background .2s var(--ease)}
.mini-item:last-child{border-bottom:0}
.mini-item:hover{background:var(--bg-alt)}
.mini-item:hover .mini-title{color:var(--orange)}
.mini-thumb{width:78px;height:58px;border-radius:10px;overflow:hidden;flex:0 0 auto;border:1px solid var(--line);background:var(--bg-alt)}
.mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-title{font-size:15.5px;font-weight:600;line-height:1.5;transition:color .2s var(--ease)}
.mini-time{font-size:12.5px;color:var(--text-3);margin-top:6px;font-family:var(--mono)}
.empty-state{text-align:center;padding:64px 20px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);width:100%}
.empty-ico{width:52px;height:52px;margin:0 auto 16px;border-radius:14px;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--text-3)}
.empty-state p{font-size:14.5px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.accordion{background:transparent;margin:0;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff}
.accordion .accordion-item{border-bottom:1px solid var(--line);background:#fff}
.accordion .accordion-item:last-child{border-bottom:0}
.accordion .accordion-title{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;min-height:52px;font-size:17px;font-weight:600;color:var(--text);background:transparent;border:0;transition:color .2s var(--ease)}
.accordion .accordion-title:hover,.accordion .accordion-title:focus{color:var(--orange);background:var(--bg)}
.accordion .accordion-title::before{content:"+";order:2;font-size:22px;font-weight:400;line-height:1;color:var(--ink-700);transition:transform .28s var(--ease),color .24s var(--ease);flex:0 0 auto}
.accordion .accordion-item.is-active .accordion-title::before{transform:rotate(45deg);color:var(--orange)}
.accordion .accordion-content{padding:0 24px 22px 20px;margin-left:24px;border-left:2px solid var(--lime);border-top:0;font-size:15px;line-height:1.8;color:var(--text-2);background:#fff}
.accordion .accordion-content p{max-width:760px;margin:0}

/* ---------- 底部 CTA + 页脚 ---------- */
.cta-band{background:var(--ink-900);color:#F7F6F2;padding:clamp(56px,7vw,96px) 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{max-width:560px}
.cta-inner p{margin-top:12px;color:rgba(247,246,242,.7);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.site-footer{background:var(--ink-900);color:rgba(247,246,242,.72);border-top:1px solid var(--line-dark);padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:52px}
.foot-col h4{font-size:14px;letter-spacing:.08em;color:rgba(247,246,242,.5);margin-bottom:18px;font-weight:600}
.foot-col .brand{margin-bottom:16px;font-size:17px}
.foot-desc{font-size:14px;line-height:1.8;max-width:280px}
.foot-badges{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.foot-badges span{font-size:11.5px;letter-spacing:.04em;padding:5px 12px;border-radius:999px;border:1px solid var(--line-dark);color:rgba(247,246,242,.8)}
.foot-links li{margin-bottom:10px}
.foot-links a{font-size:14px;line-height:2;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.foot-links a:hover{color:var(--lime);transform:translateX(2px)}
.foot-contact li{font-size:14px;line-height:2}
.foot-contact .mono{color:rgba(247,246,242,.85)}
.foot-bottom{border-top:1px solid var(--line-dark);padding:22px 0;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;font-size:12.5px;color:rgba(247,246,242,.5)}
.foot-bottom a:hover{color:var(--lime)}
.collapse-btn{background:transparent;border:0;color:rgba(247,246,242,.5);font-size:14px;letter-spacing:.08em;font-weight:600;display:none}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.reveal:nth-child(2){transition-delay:.06s}
.reveal:nth-child(3){transition-delay:.12s}
.reveal:nth-child(4){transition-delay:.18s}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .nav-menu{display:none}
  .burger{display:block}
  .nav-cta{display:none}
  .download-inner{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media screen and (max-width:768px){
  .hero{min-height:auto;padding:40px 0 56px}
  .hero-visual{margin-top:32px}
  .hero-actions .btn{width:100%}
  .hero-metrics{gap:22px}
  .trust-grid{grid-template-columns:1fr 1fr;gap:18px 0}
  .trust-item{border-left:0;padding:6px 0}
  .slide-inner{grid-template-columns:1fr;padding:20px;gap:20px}
  .orbit-previous,.orbit-next{display:none}
  .bento-wide{flex-direction:column;align-items:flex-start}
  .req-grid{grid-template-columns:1fr}
  .req-list div{flex-direction:column;gap:4px}
  .req-list dd{text-align:left}
  .quotes{grid-template-columns:1fr}
  .quote-card:nth-child(even),.quote-card:nth-child(even):hover{transform:none}
  .quote-card:hover{transform:translateY(-4px)}
  .download-btns .btn{width:100%}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:0;padding-bottom:32px}
  .collapse-btn{display:block;width:100%;text-align:left;padding:16px 0;border-bottom:1px solid var(--line-dark)}
  .foot-col{border-bottom:1px solid var(--line-dark);padding-bottom:0}
  .foot-col .foot-body{display:none;padding-bottom:18px}
  .foot-col.is-open .foot-body{display:block}
  .foot-col .brand,.foot-desc,.foot-badges{margin-bottom:0}
  .accordion .accordion-title{padding:16px 18px;font-size:16px}
  .accordion .accordion-content{margin-left:18px;padding:0 18px 18px 16px}
}
@media screen and (max-width:520px){
  .trust-grid{grid-template-columns:1fr}
  .hero-metrics{gap:16px}
  .metric-num{font-size:22px}
  .bento-card{padding:20px}
  .post-body{padding:18px}
  .brand{font-size:16.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .float-card{animation:none}
}

/* roulang page: article */
:root{
  --ink:#0B211C;
  --ink-deep:#071713;
  --ink-soft:#12332B;
  --lime:#C8F14E;
  --lime-dark:#A9D22F;
  --lime-tint:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-hover:#D3441B;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --band:#EFEFE9;
  --text:#1A1F1D;
  --text-2:#5C6663;
  --text-3:#8A938F;
  --line:#E3E2DA;
  --line-dark:rgba(255,255,255,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-hover:0 18px 40px -22px rgba(11,33,28,.35);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;background-color:transparent;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px;}

.mono{font-family:var(--mono);letter-spacing:-.01em;}

.grid-container{
  width:100%;
  max-width:1240px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
.grid-x{margin-left:-12px;margin-right:-12px;}
.grid-x > .cell{padding-left:12px;padding-right:12px;}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:0;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn i{transition:transform .2s var(--ease);}
.btn:hover{transform:translateY(-2px);}
.btn:hover i{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-hover);color:#fff;}
.btn-lg{height:54px;padding:0 30px;font-size:16px;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-ghost{background:transparent;color:var(--paper);border-color:rgba(255,255,255,.24);}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4);color:#fff;}
.btn-light{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-light:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.btn-arrow{padding:0;height:auto;color:var(--ink);font-weight:600;border:0;background:none;}
.btn-arrow:hover{color:var(--orange);}
.btn-arrow i{font-size:12px;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(11,33,28,.94);
  backdrop-filter:blur(10px);
  box-shadow:0 12px 30px -24px rgba(0,0,0,.9);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
  transition:height .3s var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand svg{width:32px;height:32px;display:block;}
.brand span{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--paper);
}
.brand span em{font-style:normal;color:var(--lime);}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-menu a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:72px;
  padding:0 14px;
  font-size:15px;
  color:rgba(247,246,242,.78);
  transition:color .2s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:20px;
  width:0;
  height:2px;
  background:var(--lime);
  transform:translateX(-50%);
  transition:width .3s var(--ease);
}
.nav-menu a:hover{color:var(--paper);}
.nav-menu a:hover::after{width:26px;}
.nav-menu a.is-active{color:var(--lime);}
.nav-menu a.is-active::after{width:26px;}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:var(--r-btn);
  border:1px solid var(--line-dark);
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:12px;
  width:20px;
  height:2px;
  background:var(--paper);
  border-radius:2px;
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.nav-drawer{
  position:fixed;
  top:0;
  right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--ink-deep);
  border-left:1px solid var(--line-dark);
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  z-index:80;
  padding:88px 24px 32px;
  overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0);}
.nav-drawer a{
  display:block;
  font-size:18px;
  color:rgba(247,246,242,.86);
  padding:16px 0;
  border-bottom:1px solid var(--line-dark);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.nav-drawer a:hover{color:var(--lime);padding-left:6px;}
.nav-drawer a.is-active{color:var(--lime);border-left:3px solid var(--lime);padding-left:12px;}
.nav-drawer .drawer-cta{margin-top:26px;width:100%;}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(7,23,19,.6);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- 深色区块通用底色 ---------- */
.dark-band{
  position:relative;
  background:var(--ink);
  color:var(--paper);
  overflow:hidden;
}
.dark-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.dark-band::after{
  content:"";
  position:absolute;
  right:-140px;
  bottom:-180px;
  width:560px;
  height:560px;
  background:radial-gradient(circle,rgba(200,241,78,.16),transparent 62%);
  pointer-events:none;
}
.dark-band > *{position:relative;z-index:1;}

/* ---------- 文章头部 ---------- */
.article-hero{
  padding:clamp(40px,6vw,72px) 0 clamp(48px,7vw,84px);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:rgba(247,246,242,.6);
  margin-bottom:26px;
}
.breadcrumb a{color:rgba(247,246,242,.6);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--lime);}
.breadcrumb .sep{color:rgba(247,246,242,.32);}
.breadcrumb .current{color:rgba(247,246,242,.9);}
.article-hero h1{
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.25;
  letter-spacing:-.02em;
  font-weight:800;
  max-width:860px;
  color:var(--paper);
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:26px;
  font-size:13px;
  color:rgba(247,246,242,.66);
}
.article-meta .dotline{
  width:1px;
  height:14px;
  background:rgba(255,255,255,.22);
}
.pill{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.04em;
  background:var(--lime);
  color:var(--ink);
  font-weight:600;
}
.pill-soft{
  background:rgba(255,255,255,.10);
  color:rgba(247,246,242,.82);
  font-weight:500;
}

/* ---------- 正文 ---------- */
.article-main{
  padding:clamp(44px,6vw,76px) 0 clamp(48px,7vw,88px);
  background:var(--paper);
}
.article-wrap{
  max-width:800px;
  margin:0 auto;
}
.article-body{
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  font-size:26px;
  line-height:1.32;
  font-weight:800;
  letter-spacing:-.01em;
  margin:40px 0 16px;
  padding-left:14px;
  color:var(--ink);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  bottom:.2em;
  width:4px;
  background:var(--lime);
  border-radius:2px;
}
.article-body h3{
  font-size:20px;
  line-height:1.4;
  font-weight:700;
  margin:28px 0 12px;
  color:var(--ink);
}
.article-body h4{
  font-size:17px;
  font-weight:700;
  margin:22px 0 10px;
  color:var(--ink-soft);
}
.article-body ul,
.article-body ol{
  margin:0 0 1.2em;
  padding-left:0;
}
.article-body ul li{
  position:relative;
  padding-left:22px;
  line-height:1.9;
  margin-bottom:8px;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;
  top:.78em;
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--lime);
}
.article-body ol{counter-reset:olist;}
.article-body ol li{
  position:relative;
  counter-increment:olist;
  padding-left:32px;
  line-height:1.9;
  margin-bottom:8px;
}
.article-body ol li::before{
  content:counter(olist,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.16em;
  font-family:var(--mono);
  font-size:13px;
  color:var(--ink);
  background:var(--lime-tint);
  border-radius:6px;
  padding:1px 6px;
}
.article-body blockquote{
  margin:24px 0;
  padding:20px 24px;
  background:var(--band);
  border-left:3px solid var(--ink);
  border-radius:0 10px 10px 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:var(--r-img);
  border:1px solid var(--line);
  margin:24px 0;
  width:100%;
  height:auto;
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  font-size:13px;
  color:var(--text-3);
  text-align:center;
  margin-top:10px;
}
.article-body a{
  color:var(--ink-soft);
  border-bottom:2px solid var(--lime);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.article-body a:hover{color:var(--orange);border-bottom-color:var(--orange);}
.article-body code{
  font-family:var(--mono);
  font-size:.94em;
  background:var(--band);
  padding:2px 6px;
  border-radius:4px;
}
.article-body pre{
  background:var(--ink);
  color:var(--paper);
  padding:20px 22px;
  border-radius:12px;
  overflow-x:auto;
  font-family:var(--mono);
  font-size:14px;
  line-height:1.7;
  margin:24px 0;
}
.article-body pre code{background:none;padding:0;color:inherit;}
.article-body table{
  width:100%;
  border-collapse:collapse;
  border:1px solid var(--line);
  font-size:15px;
  margin:24px 0;
  background:var(--card);
}
.article-body thead th{
  background:var(--band);
  font-weight:600;
  text-align:left;
  color:var(--ink);
}
.article-body th,
.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  line-height:1.7;
}
.article-body hr{
  border:0;
  border-top:1px solid var(--line);
  margin:48px 0;
}
.article-end{
  height:1px;
  background:var(--line);
  margin:48px 0 0;
}

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;
  padding:64px 20px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
}
.empty-state .empty-ico{
  width:56px;
  height:56px;
  margin:0 auto 18px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--lime-tint);
  color:var(--ink);
  font-size:22px;
}
.empty-state p{
  font-size:15px;
  color:var(--text-2);
  margin-bottom:16px;
}

/* ---------- 相关推荐 ---------- */
.related{
  background:var(--band);
  padding:clamp(52px,7vw,96px) 0;
}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:36px;
}
.section-head h2{
  font-size:clamp(24px,3vw,38px);
  line-height:1.2;
  letter-spacing:-.01em;
  font-weight:800;
  color:var(--ink);
}
.section-head p{
  font-size:15px;
  color:var(--text-2);
  margin-top:10px;
}
.card{
  display:flex;
  flex-direction:column;
  height:100%;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:#D5D4CA;
}
.card-thumb{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--band);
}
.card-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-body{
  padding:22px 24px 24px;
  display:flex;
  flex-direction:column;
  gap:12px;
  flex:1 1 auto;
}
.card-body h3{
  font-size:17px;
  font-weight:700;
  line-height:1.45;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.card:hover .card-body h3{color:var(--orange);}
.card-body p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:12px;
  padding-top:14px;
  border-top:1px dotted var(--line);
  font-size:13px;
  color:var(--text-3);
}
.tag-soft{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 10px;
  border-radius:999px;
  background:var(--band);
  color:var(--text-2);
  font-size:12px;
  letter-spacing:.04em;
}

/* ---------- 底部 CTA ---------- */
.cta-band{
  padding:clamp(52px,7vw,96px) 0;
}
.cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.cta-inner h2{
  font-size:clamp(24px,3vw,38px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--paper);
  max-width:620px;
}
.cta-inner p{
  margin-top:12px;
  font-size:15px;
  color:rgba(247,246,242,.72);
  max-width:560px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;}

/* ---------- 返回入口 ---------- */
.back-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:40px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.share-row{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
}
.share-row .share-btn{
  width:36px;
  height:36px;
  border-radius:10px;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--text-2);
  background:var(--card);
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.share-row .share-btn:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(247,246,242,.72);
  padding:clamp(48px,6vw,80px) 0 0;
  border-top:1px solid var(--line-dark);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.foot-col .brand{margin-bottom:16px;}
.foot-desc{
  font-size:14px;
  line-height:1.8;
  color:rgba(247,246,242,.66);
  max-width:300px;
}
.foot-badges{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}
.foot-badges span{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  border:1px solid var(--line-dark);
  font-size:12px;
  letter-spacing:.04em;
  color:rgba(247,246,242,.7);
}
.foot-col h4{
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  color:rgba(247,246,242,.5);
  margin-bottom:18px;
}
.foot-links li,
.foot-contact li{
  font-size:14px;
  line-height:2;
  color:rgba(247,246,242,.7);
}
.foot-links a{
  color:rgba(247,246,242,.7);
  transition:color .2s var(--ease),transform .2s var(--ease);
  display:inline-block;
}
.foot-links a:hover{color:var(--lime);transform:translateX(2px);}
.collapse-btn{display:none;}
.foot-bottom{
  border-top:1px solid var(--line-dark);
  padding:20px 0 28px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:12.5px;
  color:rgba(247,246,242,.5);
}
.foot-bottom a{color:rgba(247,246,242,.6);}
.foot-bottom a:hover{color:var(--lime);}

/* ---------- 入场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal.is-visible{opacity:1;transform:translateY(0);}
.reveal.d1{transition-delay:.06s;}
.reveal.d2{transition-delay:.12s;}
.reveal.d3{transition-delay:.18s;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-menu{display:none;}
  .nav-toggle{display:block;}
  .header-actions .btn-primary{display:none;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .article-hero{padding-top:34px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:22px;margin-top:34px;}
  .article-body h3{font-size:18px;margin-top:24px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .foot-grid{grid-template-columns:1fr;gap:0;}
  .foot-col{border-bottom:1px solid var(--line-dark);padding:0;}
  .foot-col h4{display:none;}
  .foot-col .brand,
  .foot-desc,
  .foot-badges{padding:0 0 18px;max-width:none;}
  .collapse-btn{
    display:flex;
    width:100%;
    align-items:center;
    justify-content:space-between;
    padding:16px 0;
    font-size:15px;
    font-weight:600;
    color:rgba(247,246,242,.85);
    letter-spacing:.04em;
  }
  .collapse-btn::after{
    content:"+";
    font-family:var(--mono);
    color:var(--lime);
    font-size:16px;
    transition:transform .3s var(--ease);
  }
  .collapse-btn[aria-expanded="true"]::after{transform:rotate(45deg);}
  .foot-body{display:none;padding-bottom:18px;}
  .foot-body.is-open{display:block;}
  .foot-grid > .foot-col:first-child .collapse-btn{display:none;}
}
@media (max-width:520px){
  .header-inner{height:60px;}
  .brand span{font-size:17px;}
  .article-meta{gap:10px;font-size:12.5px;}
  .back-row{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
  .btn:hover,.card:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#0B211C;
  --ink-deep:#071713;
  --ink-soft:#12332B;
  --lime:#C8F14E;
  --lime-dark:#A9D22F;
  --lime-soft:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-hover:#D3441B;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --band:#EFEFE9;
  --text:#1A1F1D;
  --muted:#5C6663;
  --weak:#8A938F;
  --line:#E3E2DA;
  --line-dark:rgba(255,255,255,.10);
  --on-dark:#F7F6F2;
  --on-dark-dim:rgba(247,246,242,.72);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow-card:0 1px 0 var(--line);
  --shadow-hover:0 18px 40px -22px rgba(11,33,28,.35);
  --ease:cubic-bezier(.2,.7,.2,1);
  --t-fast:200ms;
  --t-mid:320ms;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color var(--t-fast) var(--ease)}
button,input{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.mono{font-family:var(--mono);letter-spacing:-.01em}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--lime);color:var(--ink);padding:10px 16px;z-index:200}
.skip-link:focus{left:12px;top:12px;border-radius:8px}

/* ---------- container ---------- */
.grid-container{max-width:1240px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px;width:100%}
.section{padding-top:clamp(56px,8vw,116px);padding-bottom:clamp(56px,8vw,116px)}
.section--band{background:var(--band)}
.section--dark{background:var(--ink);color:var(--on-dark)}
.section--paper{background:var(--paper)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em;position:relative;padding-left:18px}
.section-head h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:5px;border-radius:3px;background:var(--lime)}
.section--dark .section-head h2{color:var(--on-dark)}
.section-sub{color:var(--muted);font-size:15px;max-width:620px}
.section--dark .section-sub{color:var(--on-dark-dim)}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.site-header.is-scrolled{background:rgba(7,23,19,.94);backdrop-filter:blur(12px);box-shadow:0 12px 30px -24px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand svg{width:32px;height:32px;flex:0 0 auto}
.brand span{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--on-dark);white-space:nowrap}
.brand span em{font-style:normal;color:var(--lime)}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-menu a{
  position:relative;display:inline-block;padding:10px 14px;font-size:15px;
  color:rgba(247,246,242,.78);border-radius:8px;
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;
  background:var(--lime);transform:translateX(-50%);
  transition:width var(--t-mid) var(--ease);
}
.nav-menu a:hover{color:var(--on-dark)}
.nav-menu a:hover::after{width:calc(100% - 28px)}
.nav-menu a.is-active{color:var(--lime)}
.nav-menu a.is-active::after{width:calc(100% - 28px)}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:2px;top:50%;transform:translateY(-50%);
  width:4px;height:16px;border-radius:2px;background:var(--lime);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-dark);border-radius:10px;
  background:transparent;position:relative;cursor:pointer;
}
.nav-toggle i{
  position:absolute;left:11px;width:20px;height:2px;background:var(--on-dark);border-radius:2px;
  transition:transform var(--t-mid) var(--ease),opacity var(--t-fast) var(--ease);
}
.nav-toggle i:nth-child(1){top:14px}
.nav-toggle i:nth-child(2){top:20px}
.nav-toggle i:nth-child(3){top:26px}
.nav-toggle.is-open i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open i:nth-child(2){opacity:0}
.nav-toggle.is-open i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:312px;max-width:86vw;
  background:var(--ink-deep);border-left:1px solid var(--line-dark);
  transform:translateX(105%);transition:transform var(--t-mid) var(--ease);
  z-index:90;padding:24px 20px 28px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line-dark);margin-bottom:8px}
.drawer-close{background:transparent;border:1px solid var(--line-dark);color:var(--on-dark);width:38px;height:38px;border-radius:10px;cursor:pointer;font-size:18px;line-height:1}
.mobile-drawer a{
  display:block;font-size:18px;color:rgba(247,246,242,.86);padding:16px 4px;
  border-bottom:1px solid var(--line-dark);
}
.mobile-drawer a.is-active{color:var(--lime);box-shadow:inset 4px 0 0 var(--lime);padding-left:14px}
.drawer-foot{margin-top:auto;padding-top:20px}
.scrim{position:fixed;inset:0;background:rgba(7,23,19,.55);opacity:0;visibility:hidden;transition:opacity var(--t-mid) var(--ease);z-index:85}
.scrim.is-open{opacity:1;visibility:visible}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.btn .arw{transition:transform var(--t-mid) var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-hover);transform:translateY(-2px)}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.24);color:var(--on-dark)}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-2px)}
.btn-lg{height:54px;padding:0 30px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:var(--r-btn)}
.text-link{color:var(--ink);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid transparent}
.text-link:hover{color:var(--orange)}
.text-link:hover .arw{transform:translateX(4px)}
.text-link.on-dark{color:var(--lime)}

/* ---------- badges / pills ---------- */
.pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.04em;background:var(--band);color:var(--muted);
}
.pill-lime{background:var(--lime-soft);color:var(--ink);border:1px solid rgba(200,241,78,.55)}
.pill-dark{background:var(--ink-soft);color:var(--on-dark)}
.pill-orange{background:rgba(240,86,43,.12);color:var(--orange)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;background:var(--ink);color:var(--on-dark);
  padding:34px 0 0;overflow:hidden;
  border-bottom:1px solid var(--line-dark);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,241,78,.16),transparent 68%);pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2}
.breadcrumb{font-size:13px;color:rgba(247,246,242,.56);margin-bottom:26px}
.breadcrumb a{color:rgba(247,246,242,.72)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb span.sep{margin:0 8px;opacity:.5}
.hero-row{min-height:320px;align-items:center;padding-bottom:44px}
.hero-row h1{
  color:var(--on-dark);font-size:clamp(30px,4.6vw,56px);line-height:1.12;letter-spacing:-.02em;margin:16px 0 14px;
}
.hero-sub{color:var(--on-dark-dim);font-size:17px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-figure{border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.12);position:relative}
.hero-figure img{width:100%;aspect-ratio:16/10;border-radius:0}
.hero-figure .float-card{
  position:absolute;left:16px;bottom:16px;background:rgba(7,23,19,.86);
  border:1px solid var(--line-dark);border-radius:12px;padding:12px 16px;
  font-size:13px;color:var(--on-dark-dim);display:flex;align-items:center;gap:10px;
  animation:floaty 6s ease-in-out infinite;
}
.hero-figure .float-card b{color:var(--lime);font-family:var(--mono);font-weight:600}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

/* ---------- stat band ---------- */
.stat-band{background:var(--band);border-bottom:1px solid var(--line)}
.stat-band .grid-container{padding-top:28px;padding-bottom:28px}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr)}
.stat-cell{padding:6px 24px;border-left:1px solid var(--line)}
.stat-cell:first-child{border-left:0;padding-left:0}
.stat-cell .value{font-family:var(--mono);font-size:26px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.stat-cell .label{font-size:12px;color:var(--weak);letter-spacing:.04em;margin-top:4px}

/* ---------- feature rows ---------- */
.feature-row{padding:40px 0;border-top:1px solid var(--line)}
.feature-row:first-child{border-top:0;padding-top:0}
.feature-row .num{
  font-family:var(--mono);font-size:40px;line-height:1;color:var(--lime-dark);
  letter-spacing:-.02em;margin-bottom:14px;font-weight:600;
}
.feature-row h3{font-size:clamp(20px,2.2vw,24px);line-height:1.35;margin-bottom:14px}
.feature-row p{color:var(--muted);font-size:15.5px;margin-bottom:12px}
.feature-row .keyline{
  display:flex;align-items:flex-start;gap:10px;margin-top:18px;
  padding:14px 18px;background:var(--lime-soft);border-radius:12px;
  font-size:14px;color:var(--ink);
}
.feature-row .keyline::before{
  content:"";flex:0 0 auto;width:10px;height:10px;margin-top:7px;border-radius:2px;background:var(--lime-dark);
}
.feature-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#fff}
.feature-media img{width:100%;aspect-ratio:16/10}

/* ---------- scene cards ---------- */
.scene-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;height:100%;box-shadow:var(--shadow-card);
  transition:transform var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.scene-card .ico{
  width:40px;height:40px;border-radius:12px;background:var(--lime-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.scene-card .ico svg{width:20px;height:20px}
.scene-card h3{font-size:19px;margin-bottom:10px}
.scene-card p{color:var(--muted);font-size:14.5px}

/* ---------- faq ---------- */
.accordion{border:0;background:transparent}
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion-item:first-child{border-top:1px solid var(--line)}
.accordion-title{
  position:relative;display:block;background:transparent;border:0;
  padding:22px 48px 22px 0;font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
}
.accordion-title::before{content:none !important}
.accordion-title:hover{color:var(--orange)}
.acc-icon{position:absolute;right:10px;top:50%;width:14px;height:14px;margin-top:-7px;transition:transform var(--t-mid) var(--ease)}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px}
.acc-icon::before{left:0;top:6px;width:14px;height:2px}
.acc-icon::after{left:6px;top:0;width:2px;height:14px}
.accordion-item.is-active .acc-icon{transform:rotate(45deg)}
.accordion-item.is-active .acc-icon::before{background:var(--orange)}
.accordion-item.is-active .acc-icon::after{background:var(--orange)}
.accordion-content{padding:0 0 24px;background:transparent;border:0;color:var(--muted);font-size:15px;line-height:1.8}
.accordion-content p{max-width:760px;padding-left:16px;border-left:2px solid var(--lime)}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink);color:var(--on-dark);position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;left:-160px;top:-160px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,241,78,.14),transparent 70%);
}
.cta-band .grid-container{position:relative;z-index:2}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:var(--on-dark);font-size:clamp(22px,2.6vw,32px);line-height:1.25;margin-bottom:10px}
.cta-inner p{color:var(--on-dark-dim);font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-note{margin-top:22px;font-size:13px;color:rgba(247,246,242,.56);font-family:var(--mono)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--on-dark);border-top:1px solid var(--line-dark);padding-top:64px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px 32px;padding-bottom:48px}
.foot-col h4{font-size:14px;letter-spacing:.08em;color:rgba(247,246,242,.56);margin-bottom:16px;font-weight:600}
.foot-col .collapse-btn{display:none}
.foot-desc{color:rgba(247,246,242,.72);font-size:14px;margin:16px 0 18px;max-width:320px}
.foot-badges{display:flex;gap:8px;flex-wrap:wrap}
.foot-badges span{
  font-size:12px;letter-spacing:.04em;color:rgba(247,246,242,.72);
  border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:5px 12px;
}
.foot-links li{border-bottom:1px solid var(--line-dark)}
.foot-links li:last-child{border-bottom:0}
.foot-links a{display:block;font-size:14px;line-height:2;color:rgba(247,246,242,.78);transition:color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease)}
.foot-links a:hover{color:var(--lime);transform:translateX(2px)}
.foot-contact li{font-size:14px;color:rgba(247,246,242,.78);line-height:2}
.foot-contact .mono{color:var(--lime)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line-dark);padding:20px 0 28px;
  font-size:13px;color:rgba(247,246,242,.56);
}
.foot-bottom a{color:rgba(247,246,242,.72);margin-left:16px}
.foot-bottom a:hover{color:var(--lime)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity var(--t-mid) var(--ease),transform var(--t-mid) var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .foot-grid{grid-template-columns:1fr 1fr}
  .stat-row{grid-template-columns:repeat(2,1fr);gap:20px 0}
  .stat-cell:nth-child(3){border-left:0;padding-left:0}
}
@media (max-width:768px){
  .header-inner{height:60px}
  .brand span{font-size:17px}
  .header-actions .btn{display:none}
  .hero-row{padding-bottom:32px}
  .hero-figure{order:2;margin-top:24px}
  .page-hero{padding-top:24px}
  .foot-grid{grid-template-columns:1fr;gap:0}
  .foot-col{border-bottom:1px solid var(--line-dark);padding:6px 0}
  .foot-col h4{display:none}
  .foot-col .collapse-btn{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    background:transparent;border:0;color:var(--on-dark);font-size:15px;font-weight:600;
    padding:16px 0;cursor:pointer;text-align:left;
  }
  .foot-col .collapse-btn::after{content:"+";font-size:18px;color:var(--lime);transition:transform var(--t-mid) var(--ease)}
  .foot-col.is-open .collapse-btn::after{transform:rotate(45deg)}
  .foot-body{display:none;padding-bottom:12px}
  .foot-col.is-open .foot-body{display:block}
  .foot-links li{border-bottom:0}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .foot-bottom a{margin:0 16px 0 0}
  .accordion-title{padding:18px 48px 18px 0;min-height:52px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .stat-row{grid-template-columns:1fr}
  .stat-cell{border-left:0;padding:8px 0}
  .hero-actions .btn{width:100%}
  .feature-row .num{font-size:32px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink:#0B211C;
  --ink-deep:#071713;
  --ink-soft:#12332B;
  --lime:#C8F14E;
  --lime-dark:#A9D22F;
  --lime-tint:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-hover:#D3441B;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --bg-alt:#EFEFE9;
  --dark:#0B211C;
  --text:#1A1F1D;
  --text-2:#5C6663;
  --text-3:#8A938F;
  --text-inv:#F7F6F2;
  --text-inv-2:rgba(247,246,242,.72);
  --line:#E3E2DA;
  --line-inv:rgba(255,255,255,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-card:0 1px 0 #E3E2DA;
  --shadow-hover:0 18px 40px -22px rgba(11,33,28,.35);
  --ease:cubic-bezier(.2,.7,.2,1);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sp-section:clamp(56px,8vw,116px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:var(--r-img);object-fit:cover;background:var(--bg-alt);}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:800;letter-spacing:-.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}

/* ---------- container ---------- */
.grid-container{max-width:1240px;padding-left:20px;padding-right:20px;}
.grid-container.full{padding-left:0;padding-right:0;max-width:100%;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line-inv);
  transition:background .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header.is-stuck{background:rgba(11,33,28,.94);backdrop-filter:blur(10px);box-shadow:0 10px 30px -22px rgba(0,0,0,.6);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;transition:height .32s var(--ease);}
.site-header.is-stuck .header-inner{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-inv);font-weight:800;font-size:19px;letter-spacing:-.01em;white-space:nowrap;}
.brand svg{width:30px;height:30px;flex:0 0 30px;}
.brand em{font-style:normal;color:var(--lime);}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-menu a{
  position:relative;display:inline-block;padding:10px 14px;font-size:15px;
  color:var(--text-inv-2);border-radius:8px;
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:4px;height:2px;width:0;
  background:var(--lime);transform:translateX(-50%);
  transition:width .28s var(--ease);
}
.nav-menu a:hover{color:var(--text-inv);}
.nav-menu a:hover::after{width:60%;}
.nav-menu a.is-active{color:var(--lime);}
.nav-menu a.is-active::after{width:60%;}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:-4px;top:50%;transform:translateY(-50%);
  width:4px;height:16px;border-radius:2px;background:var(--lime);
}
.header-actions{display:flex;align-items:center;gap:12px;}
.hamburger{
  display:none;width:42px;height:42px;border:1px solid var(--line-inv);
  border-radius:10px;background:transparent;cursor:pointer;padding:0;position:relative;
}
.hamburger span{
  position:absolute;left:11px;width:20px;height:2px;background:var(--text-inv);
  border-radius:2px;transition:transform .28s var(--ease),opacity .2s var(--ease),top .28s var(--ease);
}
.hamburger span:nth-child(1){top:14px;}
.hamburger span:nth-child(2){top:20px;}
.hamburger span:nth-child(3){top:26px;}
.hamburger.is-open span:nth-child(1){top:20px;transform:rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){top:20px;transform:rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  border:1px solid transparent;background:transparent;color:var(--text-inv);
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn .arw{display:inline-block;transition:transform .2s var(--ease);}
.btn:hover .arw{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-hover);transform:translateY(-2px);color:#fff;}
.btn-outline{border-color:var(--line-inv);color:var(--text-inv);}
.btn-outline:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-2px);}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px);color:var(--ink);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:var(--lime-dark);transform:translateY(-2px);color:var(--ink);}
.btn-dark{background:var(--ink);color:var(--text-inv);}
.btn-dark:hover{background:var(--ink-soft);transform:translateY(-2px);color:var(--text-inv);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-lg{height:54px;padding:0 30px;font-size:16px;}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-weight:600;font-size:15px;border-bottom:1px solid transparent;}
.btn-link:hover{color:var(--orange);}
.btn-link:hover .arw{transform:translateX(4px);}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12px;letter-spacing:.04em;}
.badge-soft{background:var(--bg-alt);color:var(--text-2);}
.badge-dark{background:var(--ink);color:var(--text-inv);}
.badge-lime{background:var(--lime);color:var(--ink);font-weight:600;}
.badge-line{border:1px solid var(--line-inv);color:var(--text-inv-2);}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(247,246,242,.6);margin-bottom:20px;}
.crumb a:hover{color:var(--lime);}
.crumb span.sep{opacity:.5;}
.crumb .cur{color:var(--text-inv-2);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;background:var(--ink);color:var(--text-inv);
  padding:clamp(48px,7vw,96px) 0 clamp(48px,7vw,88px);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 80% 20%,rgba(0,0,0,.9),transparent 70%);
  -webkit-mask-image:radial-gradient(circle at 80% 20%,rgba(0,0,0,.9),transparent 70%);
  pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;right:-140px;bottom:-180px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(200,241,78,.22),transparent 68%);
  pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2;}
.page-hero h1{
  color:var(--text-inv);
  font-size:clamp(30px,4.2vw,52px);line-height:1.14;letter-spacing:-.02em;font-weight:900;
}
.page-hero h1 em{font-style:normal;color:var(--lime);}
.hero-lead{margin-top:18px;max-width:640px;color:var(--text-inv-2);font-size:17px;line-height:1.85;}
.hero-btns{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:40px;}
.hero-stats .st b{display:block;font-family:var(--mono);font-size:24px;color:var(--lime);letter-spacing:-.02em;}
.hero-stats .st span{font-size:13px;color:rgba(247,246,242,.6);letter-spacing:.04em;}
.pkg-card{
  background:var(--ink-soft);border:1px solid var(--line-inv);border-radius:var(--r-card);
  padding:26px 26px 22px;
}
.pkg-card h3{color:var(--text-inv);font-size:18px;margin-bottom:6px;}
.pkg-card .pkg-sub{font-size:13px;color:rgba(247,246,242,.6);letter-spacing:.04em;}
.pkg-list{margin-top:18px;border-top:1px solid var(--line-inv);}
.pkg-list li{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:13px 0;border-bottom:1px solid var(--line-inv);font-size:14px;}
.pkg-list li span{color:rgba(247,246,242,.6);}
.pkg-list li b{font-family:var(--mono);font-weight:600;color:var(--text-inv);}
.pkg-card .btn{width:100%;margin-top:20px;}

/* ---------- download strip ---------- */
.dl-strip{background:var(--lime);color:var(--ink);padding:34px 0;}
.dl-strip .strip-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;}
.dl-strip h2{font-size:clamp(20px,2.2vw,26px);letter-spacing:-.01em;}
.dl-strip p{font-size:14px;color:rgba(11,33,28,.72);margin-top:6px;}
.strip-btns{display:flex;flex-wrap:wrap;gap:14px;}
.dl-strip .btn-outline{border-color:rgba(11,33,28,.28);color:var(--ink);}
.dl-strip .btn-outline:hover{border-color:var(--ink);color:var(--ink);background:rgba(11,33,28,.06);}
.dl-strip .strip-meta{font-family:var(--mono);font-size:12px;letter-spacing:.02em;color:rgba(11,33,28,.7);}

/* ---------- section base ---------- */
.section{padding:var(--sp-section) 0;}
.section-alt{background:var(--bg-alt);}
.section-dark{background:var(--ink);color:var(--text-inv);}
.section-head{margin-bottom:clamp(28px,4vw,52px);}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.14em;color:var(--text-3);text-transform:uppercase;}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--lime);border-radius:2px;}
.section-head h2{
  position:relative;padding-left:16px;font-size:clamp(24px,3vw,38px);line-height:1.2;margin-top:14px;
}
.section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--lime);}
.section-head p{margin-top:12px;color:var(--text-2);max-width:760px;}
.section-dark .section-head h2{color:var(--text-inv);}
.section-dark .section-head p{color:var(--text-inv-2);}
.section-dark .eyebrow{color:rgba(247,246,242,.6);}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:0;}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;background:var(--line);
}
.tl-item{position:relative;padding-left:78px;margin-bottom:32px;}
.tl-item:last-child{margin-bottom:0;}
.tl-node{
  position:absolute;left:0;top:4px;width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--card);border:2px solid var(--lime);color:var(--ink);
  font-family:var(--mono);font-size:15px;font-weight:700;z-index:2;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease);
}
.tl-item:hover .tl-node{background:var(--orange);border-color:var(--orange);color:#fff;}
.tl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--shadow-card);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.tl-item:hover .tl-card{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.tl-card h3{font-size:21px;line-height:1.35;}
.tl-card .tl-tag{margin-bottom:12px;}
.tl-card p{margin-top:12px;color:var(--text-2);font-size:15.5px;}
.tl-shot{margin-top:20px;}
.tl-shot figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.dot-list{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);}
.dot-list li{position:relative;padding-left:20px;font-size:15px;color:var(--text-2);line-height:1.9;}
.dot-list li::before{
  content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;background:var(--lime);
}

/* ---------- scene cards ---------- */
.scene-card{
  display:flex;gap:16px;align-items:flex-start;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  height:100%;transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.scene-ico{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:var(--lime-tint);
  display:flex;align-items:center;justify-content:center;
}
.scene-ico svg{width:22px;height:22px;}
.scene-card h3{font-size:18px;}
.scene-card p{margin-top:8px;font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* ---------- system requirements ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.req-card{
  background:var(--ink-soft);border:1px solid var(--line-inv);border-radius:var(--r-card);
  padding:28px;
}
.req-card .req-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line-inv);}
.req-card .req-name{font-family:var(--mono);font-size:16px;font-weight:700;color:var(--lime);letter-spacing:.02em;}
.req-card dl{margin:0;}
.req-row{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px dotted rgba(255,255,255,.16);font-size:14.5px;}
.req-row:last-child{border-bottom:none;}
.req-row dt{color:rgba(247,246,242,.6);}
.req-row dd{margin:0;font-family:var(--mono);color:var(--text-inv);text-align:right;}
.req-note{margin-top:28px;font-size:14px;color:var(--text-inv-2);display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;}
.faq-acc{border:none;background:transparent;margin:0;}
.faq-acc .accordion-item{border:none;border-bottom:1px solid var(--line);background:transparent;}
.faq-acc .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 44px 22px 0;font-size:17px;font-weight:600;color:var(--text);
  background:transparent;border:none;position:relative;transition:color .2s var(--ease);
}
.faq-acc .accordion-title::before{
  content:"";position:absolute;right:8px;top:50%;width:14px;height:2px;
  background:var(--ink);transform:translateY(-50%);
}
.faq-acc .accordion-title::after{
  content:"";position:absolute;right:14px;top:50%;width:2px;height:14px;
  background:var(--ink);transform:translateY(-50%);
  transition:transform .28s var(--ease),opacity .2s var(--ease);
}
.faq-acc .accordion-item.is-active .accordion-title{color:var(--ink);}
.faq-acc .accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0;}
.faq-acc .accordion-title:hover{color:var(--orange);}
.faq-acc .accordion-content{
  padding:0 0 24px 18px;border-left:2px solid var(--lime);
  border-top:none;background:transparent;color:var(--text-2);font-size:15px;line-height:1.85;max-width:760px;
}
.faq-acc .accordion-content p{margin:0;}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:var(--text-inv);padding:clamp(48px,6vw,84px) 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-inner h2{color:var(--text-inv);font-size:clamp(22px,2.6vw,32px);line-height:1.25;max-width:620px;}
.cta-inner p{margin-top:10px;color:var(--text-inv-2);font-size:15px;}
.cta-btns{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-deep);color:var(--text-inv);border-top:1px solid var(--line-inv);padding:clamp(44px,6vw,72px) 0 0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}
.foot-col h4{font-size:14px;letter-spacing:.08em;color:rgba(247,246,242,.55);font-weight:600;margin-bottom:16px;}
.foot-desc{margin-top:16px;font-size:14px;color:var(--text-inv-2);max-width:280px;}
.foot-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.foot-badges span{font-size:12px;padding:4px 10px;border-radius:999px;border:1px solid var(--line-inv);color:var(--text-inv-2);}
.foot-links li,.foot-contact li{font-size:14px;line-height:2;color:var(--text-inv-2);}
.foot-links a{display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);}
.foot-links a:hover{color:var(--lime);transform:translateX(2px);}
.foot-contact span{color:var(--text-inv);}
.collapse-btn{display:none;}
.foot-bottom{
  margin-top:clamp(36px,4vw,56px);padding:22px 0;border-top:1px solid var(--line-inv);
  display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:space-between;
  font-size:12.5px;color:rgba(247,246,242,.5);
}
.foot-bottom a{color:rgba(247,246,242,.7);}
.foot-bottom a:hover{color:var(--lime);}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);z-index:90;
  background:var(--ink);border-left:1px solid var(--line-inv);
  transform:translateX(102%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line-inv);}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line-inv);background:transparent;color:var(--text-inv);font-size:20px;line-height:1;cursor:pointer;}
.drawer-close:hover{border-color:var(--lime);color:var(--lime);}
.drawer-nav{flex:1;overflow-y:auto;padding-top:8px;}
.drawer-nav a{display:block;padding:16px 4px;font-size:18px;color:var(--text-inv-2);border-bottom:1px solid var(--line-inv);}
.drawer-nav a:hover{color:var(--text-inv);}
.drawer-nav a.is-active{color:var(--lime);border-left:4px solid var(--lime);padding-left:14px;}
.drawer .btn{width:100%;margin-top:20px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(7,23,19,.55);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .foot-grid{grid-template-columns:1fr 1fr;}
  .nav-menu{display:none;}
  .hamburger{display:block;}
  .req-grid{grid-template-columns:1fr;}
}
@media screen and (max-width:768px){
  .header-inner{height:60px;}
  .site-header.is-stuck .header-inner{height:60px;}
  .tl-item{padding-left:0;margin-bottom:24px;}
  .timeline::before{display:none;}
  .tl-node{position:static;margin-bottom:14px;}
  .tl-card{padding:22px;}
  .faq-acc .accordion-title{min-height:52px;padding:18px 44px 18px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .dl-strip .strip-inner{flex-direction:column;align-items:flex-start;}
  .hero-stats{gap:24px;}
  .foot-grid{grid-template-columns:1fr;gap:0;}
  .foot-col{border-bottom:1px solid var(--line-inv);padding:4px 0;}
  .foot-col h4{display:none;}
  .collapse-btn{
    display:flex;width:100%;align-items:center;justify-content:space-between;
    background:transparent;border:none;color:var(--text-inv);font-size:14px;
    letter-spacing:.08em;padding:16px 0;cursor:pointer;
  }
  .collapse-btn::after{content:"+";font-size:18px;color:var(--lime);line-height:1;}
  .foot-col.is-open .collapse-btn::after{content:"−";}
  .foot-body{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
  .foot-col.is-open .foot-body{max-height:520px;padding-bottom:14px;}
  .foot-col:first-child .foot-body{max-height:none;}
  .foot-col:first-child{border-bottom:1px solid var(--line-inv);padding-bottom:20px;}
}
@media screen and (max-width:520px){
  .brand{font-size:17px;}
  .hero-btns .btn,.strip-btns .btn{width:100%;}
  .strip-btns{width:100%;}
  .cta-btns{width:100%;}
  .cta-btns .btn{width:100%;}
  .req-card{padding:22px;}
  .req-row{flex-direction:column;gap:4px;align-items:flex-start;}
  .req-row dd{text-align:left;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  .btn:hover,.scene-card:hover,.tl-item:hover .tl-card{transform:none;}
}

/* roulang page: category4 */
:root{
  --ink:#0B211C;
  --ink-deep:#071713;
  --ink-soft:#12332B;
  --lime:#C8F14E;
  --lime-dark:#A9D22F;
  --lime-fade:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-dark:#D3441B;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --band:#EFEFE9;
  --text:#1A1F1D;
  --muted:#5C6663;
  --faint:#8A938F;
  --line:#E3E2DA;
  --line-dark:rgba(255,255,255,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 1px 0 #E3E2DA;
  --sh-hover:0 18px 40px -22px rgba(11,33,28,.35);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.8;color:var(--text);background:var(--paper);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,h5,h6{font-family:var(--font);color:var(--ink);font-weight:800;letter-spacing:-.01em;margin:0;line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.grid-container{max-width:1240px;padding-left:20px;padding-right:20px;margin:0 auto}
.mono{font-family:var(--mono);letter-spacing:-.01em}

/* ===== 顶栏 ===== */
.site-header{position:sticky;top:0;z-index:60;background:var(--ink);border-bottom:1px solid var(--line-dark);transition:background .32s var(--ease),box-shadow .32s var(--ease)}
.site-header.is-scrolled{background:rgba(11,33,28,.94);backdrop-filter:blur(10px);box-shadow:0 12px 30px -24px rgba(0,0,0,.7)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;transition:height .32s var(--ease)}
.site-header.is-scrolled .head-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--paper);flex:none}
.brand svg{width:32px;height:32px;flex:none}
.brand em{font-style:normal;color:var(--lime)}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-menu a{position:relative;font-size:15px;color:rgba(247,246,242,.78);padding:6px 0;transition:color .2s var(--ease)}
.nav-menu a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--lime);transform:translateX(-50%);transition:width .28s var(--ease)}
.nav-menu a:hover{color:var(--paper)}
.nav-menu a:hover::after{width:100%}
.nav-menu a.is-active{color:var(--lime)}
.nav-menu a.is-active::after{width:100%}
.nav-menu a.is-active::before{content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);width:4px;height:16px;background:var(--lime);border-radius:2px}
.head-right{display:flex;align-items:center;gap:14px;flex:none}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line-dark);border-radius:10px;background:transparent;position:relative}
.nav-toggle span{position:absolute;left:10px;width:18px;height:2px;background:var(--paper);border-radius:2px;transition:transform .32s var(--ease),opacity .2s var(--ease)}
.nav-toggle span:nth-child(1){top:13px}
.nav-toggle span:nth-child(2){top:19px}
.nav-toggle span:nth-child(3){top:25px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 抽屉 */
.nav-drawer{position:fixed;top:0;right:0;width:min(340px,86vw);height:100%;background:var(--ink-soft);z-index:80;transform:translateX(100%);transition:transform .32s var(--ease);padding:88px 24px 32px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;border-left:1px solid var(--line-dark)}
.nav-drawer.is-open{transform:translateX(0)}
.nav-drawer a{display:block;font-size:18px;color:rgba(247,246,242,.82);padding:16px 0;border-bottom:1px solid var(--line-dark)}
.nav-drawer a.is-active{color:var(--lime)}
.nav-drawer .drawer-cta{margin-top:24px;border:none}
.drawer-mask{position:fixed;inset:0;background:rgba(7,23,19,.6);opacity:0;pointer-events:none;transition:opacity .32s var(--ease);z-index:70}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-lg{height:54px;padding:0 28px;font-size:16px}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:var(--paper)}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-2px)}
.btn .arrow{transition:transform .2s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}

/* ===== 通用板块 ===== */
.section{padding:clamp(56px,8vw,116px) 0}
.section-paper{background:var(--paper)}
.section-band{background:var(--band)}
.section-dark{background:var(--ink);color:var(--paper)}
.section-dark h2,.section-dark h3{color:var(--paper)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,38px);letter-spacing:-.01em}
.section-head h2::before{content:"";display:inline-block;width:6px;height:.72em;background:var(--lime);border-radius:2px;margin-right:14px;vertical-align:-.06em}
.section-sub{margin-top:12px;font-size:15px;color:var(--muted);max-width:640px}
.link-more{font-size:15px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.link-more:hover{color:var(--orange);border-color:var(--orange)}

/* ===== Hero ===== */
.page-hero{position:relative;background:var(--ink);color:var(--paper);overflow:hidden;padding:clamp(48px,7vw,92px) 0 clamp(52px,7vw,96px)}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:56px 56px;pointer-events:none}
.page-hero::after{content:"";position:absolute;right:-140px;bottom:-180px;width:520px;height:520px;background:radial-gradient(circle,rgba(200,241,78,.18),transparent 68%);pointer-events:none}
.page-hero .grid-container{position:relative;z-index:2}
.hero-inner{row-gap:36px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.08em;color:var(--lime);border:1px solid rgba(200,241,78,.4);border-radius:999px;padding:5px 14px;margin-bottom:20px}
.page-hero h1{font-size:clamp(30px,4.6vw,56px);line-height:1.12;letter-spacing:-.02em;color:var(--paper);max-width:16em}
.page-hero h1 span{color:var(--lime)}
.hero-lead{margin-top:20px;font-size:16px;line-height:1.8;color:rgba(247,246,242,.72);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.pill{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12px;letter-spacing:.04em}
.pill-lime{background:var(--lime);color:var(--ink);font-weight:600}
.pill-dot{background:rgba(255,255,255,.08);color:rgba(247,246,242,.8);border:1px solid var(--line-dark)}
.hero-figure{margin:0;border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.12);position:relative}
.hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}

/* ===== 速览条 ===== */
.quick-bar{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:28px 0}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.quick-item{padding:6px 24px;border-left:1px solid var(--line)}
.quick-item:first-child{border-left:none;padding-left:0}
.quick-num{font-family:var(--mono);font-size:24px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.quick-label{margin-top:4px;font-size:12px;letter-spacing:.04em;color:var(--faint)}

/* ===== 对比表 ===== */
.compare-layout{row-gap:32px}
.table-shell{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.compare-table{width:100%;border-collapse:collapse}
.compare-table th{background:var(--ink);color:var(--paper);font-size:14px;font-weight:600;letter-spacing:.04em;padding:16px;text-align:left;white-space:nowrap}
.compare-table th:first-child{background:var(--ink-deep);color:rgba(247,246,242,.7)}
.compare-table td{padding:0 16px;height:56px;font-size:15px;color:var(--text);border-top:1px solid var(--line);vertical-align:middle}
.compare-table tbody tr:nth-child(even) td{background:#FAFAF7}
.compare-table td:first-child{color:var(--faint);font-size:14px}
.compare-table .val{font-family:var(--mono);font-weight:600;color:var(--ink);letter-spacing:-.01em}
.compare-table .diff{color:var(--orange);font-weight:600}
.table-note{margin-top:16px;font-size:13px;color:var(--faint)}

.sticky-card{position:sticky;top:96px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px}
.sticky-card h3{font-size:20px}
.sticky-card .card-sub{margin-top:12px;font-size:14px;color:var(--muted)}
.mini-list{margin-top:20px;border-top:1px dashed var(--line)}
.mini-list li{padding:14px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--text);display:flex;gap:10px}
.mini-list li::before{content:"";flex:none;width:8px;height:8px;margin-top:9px;background:var(--lime);border-radius:2px}
.sticky-card .btn{margin-top:24px}

/* ===== 环境核对 ===== */
.env-grid{row-gap:24px}
.env-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;height:100%;transition:transform .32s var(--ease),box-shadow .32s var(--ease)}
.env-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.env-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.env-head span{font-family:var(--mono);font-size:15px;letter-spacing:-.01em;color:var(--ink);font-weight:600}
.env-tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--ink);color:var(--paper);font-size:12px;letter-spacing:.04em}
.env-list{margin-top:8px}
.env-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px dotted var(--line);font-size:14.5px}
.env-list li:last-child{border-bottom:none}
.env-key{color:var(--faint)}
.env-val{font-family:var(--mono);color:var(--ink);font-weight:600;text-align:right}
.img-card{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);height:100%;min-height:220px}
.img-card img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.img-card:hover img{transform:scale(1.03)}
.img-card figcaption{position:absolute;left:0;right:0;bottom:0;padding:20px;background:linear-gradient(to top,rgba(11,33,28,.9),transparent);color:var(--paper)}
.img-card figcaption strong{display:block;font-size:16px;font-weight:700}
.img-card figcaption span{font-size:13px;color:rgba(247,246,242,.75)}

/* ===== 横向信息卡 ===== */
.tip-grid{display:grid;gap:20px}
.tip-card{display:flex;gap:20px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 28px;transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease)}
.tip-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--lime-dark)}
.tip-ico{flex:none;width:48px;height:48px;border-radius:12px;background:var(--lime-fade);display:flex;align-items:center;justify-content:center}
.tip-ico svg{width:24px;height:24px}
.tip-body h3{font-size:19px}
.tip-body p{margin-top:8px;font-size:14.5px;color:var(--muted)}

/* ===== FAQ ===== */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-accordion{background:transparent;border:none;margin:0;border-top:1px solid var(--line)}
.faq-accordion .accordion-item{background:transparent;border:none;border-bottom:1px solid var(--line)}
.faq-accordion .accordion-title{position:relative;display:block;background:transparent;border:none;padding:22px 56px 22px 0;font-size:17px;font-weight:600;color:var(--text);line-height:1.5;transition:color .2s var(--ease)}
.faq-accordion .accordion-title:hover{color:var(--ink)}
.faq-accordion .accordion-title::before,
.faq-accordion .accordion-title::after{content:"";position:absolute;background:var(--ink);border-radius:2px;transition:transform .32s var(--ease),opacity .28s var(--ease),background .2s var(--ease)}
.faq-accordion .accordion-title::before{right:10px;top:50%;width:14px;height:2px;transform:translateY(-50%)}
.faq-accordion .accordion-title::after{right:16px;top:50%;width:2px;height:14px;transform:translateY(-50%)}
.faq-accordion .accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--ink)}
.faq-accordion .accordion-content{background:transparent;border:none;padding:0 0 26px 20px;border-left:2px solid var(--lime);font-size:15px;line-height:1.8;color:var(--muted);max-width:760px}

/* ===== CTA ===== */
.cta-band{background:var(--ink);color:var(--paper);padding:clamp(56px,7vw,96px) 0;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;left:-120px;top:-160px;width:460px;height:460px;background:radial-gradient(circle,rgba(200,241,78,.16),transparent 68%);pointer-events:none}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:760px;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,3vw,38px);color:var(--paper)}
.cta-inner p{margin-top:16px;font-size:16px;color:rgba(247,246,242,.72)}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-top:32px}
.cta-meta{margin-top:24px;font-family:var(--mono);font-size:13px;color:rgba(247,246,242,.6)}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:var(--paper);padding:64px 0 0;border-top:1px solid var(--line-dark)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.foot-col h4{font-size:14px;letter-spacing:.08em;color:rgba(247,246,242,.5);font-weight:600;margin-bottom:16px}
.foot-col .brand{margin-bottom:14px}
.foot-desc{font-size:14px;line-height:1.9;color:rgba(247,246,242,.7);max-width:260px}
.foot-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.foot-badges span{font-size:12px;letter-spacing:.04em;padding:4px 10px;border-radius:999px;border:1px solid var(--line-dark);color:rgba(247,246,242,.7)}
.foot-links li{margin-bottom:10px}
.foot-links a,.foot-contact li{font-size:14px;line-height:2;color:rgba(247,246,242,.72);transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.foot-links a:hover{color:var(--lime);transform:translateX(2px)}
.foot-contact li{display:block}
.foot-contact .mono{color:var(--lime)}
.collapse-btn{display:none}
.foot-bottom{margin-top:48px;border-top:1px solid var(--line-dark);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:12.5px;color:rgba(247,246,242,.5)}
.foot-bottom a{color:rgba(247,246,242,.62);margin-right:14px;transition:color .2s var(--ease)}
.foot-bottom a:hover{color:var(--lime)}

/* ===== 入场动效 ===== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.grid-x > .cell.reveal:nth-child(2){transition-delay:.06s}
.grid-x > .cell.reveal:nth-child(3){transition-delay:.12s}
.grid-x > .cell.reveal:nth-child(4){transition-delay:.18s}
.tip-grid .reveal:nth-child(2){transition-delay:.06s}
.tip-grid .reveal:nth-child(3){transition-delay:.12s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .quick-grid{grid-template-columns:repeat(2,1fr);gap:22px 0}
  .quick-item:nth-child(3){border-left:none;padding-left:0}
  .sticky-card{position:static}
}
@media (max-width:768px){
  .head-inner{height:60px}
  .site-header.is-scrolled .head-inner{height:60px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .quick-grid{grid-template-columns:1fr 1fr}
  .quick-item{padding:4px 16px}
  .hero-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:0}
  .foot-col{border-bottom:1px solid var(--line-dark);padding:6px 0}
  .foot-col h4{display:none}
  .collapse-btn{display:flex;align-items:center;justify-content:space-between;width:100%;background:transparent;border:none;color:var(--paper);font-size:14px;letter-spacing:.08em;padding:16px 0;cursor:pointer}
  .collapse-btn::after{content:"+";font-size:18px;color:var(--lime);transition:transform .3s var(--ease)}
  .foot-col.is-open .collapse-btn::after{transform:rotate(45deg)}
  .foot-body{display:none;padding-bottom:18px}
  .foot-col.is-open .foot-body{display:block}
  .foot-col .brand{display:none}
  .foot-desc{max-width:none;margin-bottom:16px}
  .foot-bottom{flex-direction:column;align-items:flex-start}

  /* 表格转卡片 */
  .table-shell{border:none;background:transparent;border-radius:0}
  .compare-table thead{display:none}
  .compare-table,.compare-table tbody,.compare-table tr,.compare-table td{display:block;width:100%}
  .compare-table tr{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:16px;padding:6px 0}
  .compare-table td{border-top:none;height:auto;padding:10px 18px;display:flex;justify-content:space-between;gap:16px;align-items:baseline}
  .compare-table tbody tr:nth-child(even) td{background:transparent}
  .compare-table td:first-child{font-size:15px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:6px}
  .compare-table td::before{content:attr(data-label);color:var(--faint);font-size:13px;flex:none}
  .compare-table td:first-child::before{content:none}
  .compare-table td > span{text-align:right}
}
@media (max-width:520px){
  .quick-grid{grid-template-columns:1fr}
  .quick-item{border-left:none;padding-left:0}
  .cta-actions .btn{width:100%}
  .env-list li{flex-direction:column;gap:4px}
  .env-val{text-align:left}
}

/* roulang page: category3 */
:root{
  --ink:#0B211C;
  --ink-deep:#071713;
  --ink-soft:#12332B;
  --accent:#C8F14E;
  --accent-dark:#A9D22F;
  --accent-ghost:rgba(200,241,78,.14);
  --orange:#F0562B;
  --orange-dark:#D3441B;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --block:#EFEFE9;
  --dark:#0B211C;
  --t1:#1A1F1D;
  --t2:#5C6663;
  --t3:#8A938F;
  --on-dark:#F7F6F2;
  --on-dark-2:rgba(247,246,242,.72);
  --on-dark-3:rgba(247,246,242,.5);
  --line:#E3E2DA;
  --line-dark:rgba(255,255,255,.10);
  --dot:rgba(11,33,28,.14);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow-hover:0 18px 40px -22px rgba(11,33,28,.35);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--t1);line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.mono{font-family:var(--font-mono);letter-spacing:-.01em}
.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}
.grid-container{max-width:1240px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}
.grid-x{display:flex;flex-wrap:wrap}
.grid-x > .cell{min-width:0}
@media screen and (min-width:1025px){
  .large-4{width:33.33333%}
  .large-5{width:41.66667%}
  .large-6{width:50%}
  .large-7{width:58.33333%}
  .large-8{width:66.66667%}
  .large-3{width:25%}
}
@media screen and (min-width:641px) and (max-width:1024px){
  .medium-6{width:50%}
  .medium-12{width:100%}
}
@media screen and (max-width:640px){
  .small-12{width:100%}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;background:transparent;color:var(--ink);
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--on-dark);border-color:rgba(255,255,255,.24)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-outline:hover{border-color:var(--ink-soft);transform:translateY(-2px)}
.btn-lg{height:54px;padding:0 30px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-soft)}
.link-arrow::after{content:"→";transition:transform .24s var(--ease)}
.link-arrow:hover{color:var(--orange)}
.link-arrow:hover::after{transform:translateX(4px)}
.link-arrow.on-dark{color:var(--accent)}
.link-arrow.on-dark:hover{color:var(--orange)}

/* ============ 徽章与标签 ============ */
.pill{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.04em;background:var(--block);color:var(--t2)}
.pill-plat{background:var(--ink-soft);color:var(--on-dark-2)}
.pill-new{background:var(--accent);color:var(--ink);font-weight:600}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:70;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header.is-scrolled{background:rgba(11,33,28,.94);backdrop-filter:blur(10px);box-shadow:0 12px 30px -24px rgba(0,0,0,.7)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;transition:height .32s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--on-dark);font-weight:800;font-size:18px;letter-spacing:-.01em}
.brand svg{width:30px;height:30px;flex:0 0 auto}
.brand em{font-style:normal;color:var(--accent)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  position:relative;display:inline-block;
  padding:10px 12px;border-radius:8px;
  font-size:15px;color:var(--on-dark-2);
  transition:color .2s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:4px;height:2px;
  background:var(--accent);border-radius:2px;
  transition:left .32s var(--ease),right .32s var(--ease);
}
.nav-menu a:hover{color:var(--on-dark)}
.nav-menu a:hover::after{left:12px;right:12px}
.nav-menu a.is-active{color:var(--accent);padding-left:20px}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:8px;top:50%;transform:translateY(-50%);
  width:4px;height:16px;border-radius:2px;background:var(--accent);
}
.nav-menu a.is-active::after{left:12px;right:12px}
.header-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-dark);border-radius:10px;
  background:transparent;position:relative;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--on-dark);border-radius:2px;transition:transform .28s var(--ease),opacity .2s var(--ease)}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.menu-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.drawer{
  position:fixed;top:0;right:0;z-index:95;
  width:min(86vw,340px);height:100%;
  background:var(--ink);border-left:1px solid var(--line-dark);
  padding:24px 20px 32px;
  display:flex;flex-direction:column;
  transform:translateX(102%);
  transition:transform .32s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .drawer-brand{margin-bottom:20px}
.drawer nav{display:flex;flex-direction:column}
.drawer nav a{
  font-size:18px;color:var(--on-dark-2);padding:18px 0;
  border-bottom:1px solid var(--line-dark);
}
.drawer nav a:hover,.drawer nav a.is-active{color:var(--accent)}
.drawer .drawer-cta{margin-top:auto;padding-top:24px}
.drawer .drawer-cta .btn{width:100%}
.drawer-mask{
  position:fixed;inset:0;z-index:90;background:rgba(7,23,19,.6);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 面包屑 ============ */
.crumb{font-size:13px;color:var(--on-dark-3);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumb a{color:var(--on-dark-2)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--accent)}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--on-dark);
  padding:clamp(44px,6vw,72px) 0 clamp(48px,6.5vw,84px);
}
.cat-hero .hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.25));
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.25));
}
.cat-hero .hero-glow{
  position:absolute;right:-140px;bottom:-200px;width:560px;height:560px;pointer-events:none;
  background:radial-gradient(circle,rgba(200,241,78,.18),transparent 68%);
}
.cat-hero .hero-arc{
  position:absolute;right:6%;top:12%;width:280px;height:280px;pointer-events:none;opacity:.5;
  border:1px solid rgba(200,241,78,.28);border-radius:50%;
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--accent);margin:18px 0 14px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);border-radius:2px}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,56px);line-height:1.12;letter-spacing:-.02em;
  font-weight:900;color:var(--on-dark);max-width:16em;
}
.cat-hero .hero-sub{
  margin-top:16px;max-width:640px;
  font-size:clamp(15px,1.5vw,17px);line-height:1.85;color:var(--on-dark-2);
}
.cat-search{
  margin-top:28px;display:flex;gap:12px;align-items:center;
  max-width:620px;
}
.cat-search input{
  flex:1 1 auto;min-width:0;height:52px;padding:0 18px;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.20);
  background:rgba(255,255,255,.05);color:var(--on-dark);font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.cat-search input::placeholder{color:rgba(247,246,242,.45)}
.cat-search input:focus{
  outline:none;border-color:var(--accent);background:rgba(255,255,255,.08);
  box-shadow:0 0 0 4px var(--accent-ghost);
}
.tag-row{
  margin-top:26px;display:flex;gap:10px;flex-wrap:wrap;
}
.tag-pill{
  display:inline-flex;align-items:center;height:32px;padding:0 16px;border-radius:var(--r-pill);
  font-size:13px;letter-spacing:.03em;
  border:1px solid rgba(255,255,255,.18);color:var(--on-dark-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.tag-pill:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.tag-pill.is-on{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:600}
.hero-meta{
  margin-top:22px;font-size:13px;color:var(--on-dark-3);letter-spacing:.02em;
}

/* ============ 区块通用 ============ */
.section{padding:clamp(56px,8vw,116px) 0}
.section-tight{padding:clamp(44px,6vw,80px) 0}
.band-block{background:var(--block)}
.band-white{background:#fff}
.band-dark{background:var(--ink);color:var(--on-dark)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em}
.sec-head .sec-note{font-size:14px;color:var(--t2);max-width:420px;line-height:1.7}
.band-dark .sec-head h2{color:var(--on-dark)}
.band-dark .sec-head .sec-note{color:var(--on-dark-2)}
.h2-bar{position:relative;padding-left:16px}
.h2-bar::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--accent)}
.band-dark .h2-bar::before{background:var(--accent)}

/* ============ 频道 Tabs ============ */
.channel-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  border-bottom:1px solid var(--line);padding-bottom:0;margin-bottom:36px;flex-wrap:wrap;
}
.channel-tabs{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.channel-tabs::-webkit-scrollbar{display:none}
.channel-tab{
  position:relative;background:none;border:0;padding:14px 14px 16px;
  font-size:15px;font-weight:600;color:var(--t2);white-space:nowrap;
  transition:color .2s var(--ease);
}
.channel-tab::after{
  content:"";position:absolute;left:50%;right:50%;bottom:-1px;height:2px;
  background:var(--accent-dark);transition:left .3s var(--ease),right .3s var(--ease);
}
.channel-tab:hover{color:var(--ink)}
.channel-tab:hover::after{left:14px;right:14px}
.channel-tab.is-active{color:var(--ink)}
.channel-tab.is-active::after{left:0;right:0;background:var(--ink)}
.channel-tab:focus-visible{outline:2px solid var(--accent-dark);outline-offset:-2px;border-radius:6px}

/* ============ 卡片网格 ============ */
.post-grid{margin-left:-14px;margin-right:-14px;margin-bottom:-28px}
.post-grid > .cell{padding-left:14px;padding-right:14px;margin-bottom:28px;display:flex}
.post-card{
  display:flex;flex-direction:column;width:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D8D7CE}
.post-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--block)}
.post-thumb img{width:100%;height:100%;transition:transform .5s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-thumb .thumb-tag{
  position:absolute;left:12px;top:12px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:rgba(11,33,28,.82);color:var(--on-dark);font-size:12px;letter-spacing:.04em;
  display:inline-flex;align-items:center;backdrop-filter:blur(4px);
}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.post-title{font-size:17px;font-weight:700;line-height:1.5;letter-spacing:-.005em;transition:color .24s var(--ease)}
.post-card:hover .post-title{color:var(--orange)}
.post-desc{font-size:14px;line-height:1.75;color:var(--t2)}
.post-foot{
  margin-top:auto;padding-top:16px;border-top:1px dashed var(--dot);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--t3);
}
.post-foot .mono{font-size:12.5px}
.post-foot .go{color:var(--ink-soft);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.post-foot .go::after{content:"→";transition:transform .24s var(--ease)}
.post-card:hover .post-foot .go{color:var(--orange)}
.post-card:hover .post-foot .go::after{transform:translateX(4px)}

/* ============ 数据条 ============ */
.stat-grid{display:flex;flex-wrap:wrap;margin:0 -12px}
.stat-item{
  flex:1 1 220px;min-width:200px;
  padding:8px 24px 8px 28px;
  border-left:1px solid var(--line-dark);
}
.stat-item:first-child{border-left:0;padding-left:4px}
.stat-num{font-family:var(--font-mono);font-size:clamp(26px,3vw,38px);font-weight:700;color:var(--accent);letter-spacing:-.01em;line-height:1.15}
.stat-num small{font-size:15px;color:var(--on-dark-2);font-weight:600;margin-left:4px;font-family:var(--font-sans)}
.stat-label{margin-top:6px;font-size:13px;letter-spacing:.04em;color:var(--on-dark-2)}

/* ============ 图文行 ============ */
.feed-row{display:flex;flex-wrap:wrap;align-items:center;margin:0 -18px}
.feed-row + .feed-row{margin-top:clamp(32px,4vw,56px)}
.feed-row > [class*="large-"]{padding:0 18px}
.feed-media{position:relative}
.feed-media img{
  width:100%;aspect-ratio:16/10;border-radius:var(--r-img);
  border:1px solid var(--line);
}
.feed-body h3{font-size:clamp(20px,2.2vw,24px);line-height:1.35}
.feed-body p{margin-top:14px;font-size:16px;color:var(--t2);line-height:1.85;max-width:56ch}
.point-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.point-list li{position:relative;padding-left:20px;font-size:15px;color:var(--t1)}
.point-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--accent-dark);
}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--accent-ghost);
  color:var(--ink-soft);font-family:var(--font-mono);font-size:14px;font-weight:700;
  margin-bottom:14px;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px}
.accordion{border:0;background:transparent;margin:0}
.accordion .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion .accordion-item:first-child{border-top:1px solid var(--line)}
.accordion .accordion-title{
  position:relative;display:block;
  padding:24px 56px 24px 0;
  font-size:17px;font-weight:600;color:var(--t1);
  border:0;background:transparent;
  transition:color .2s var(--ease);
}
.accordion .accordion-title:hover{color:var(--orange)}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:8px;top:50%;
  transform:translateY(-50%);
  font-size:24px;font-weight:400;line-height:1;color:var(--ink-soft);
  margin:0;width:auto;height:auto;
  transition:transform .3s var(--ease),color .2s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title::before{
  transform:translateY(-50%) rotate(45deg);color:var(--orange);
}
.accordion .accordion-content{
  padding:0 56px 26px 18px;border:0;background:transparent;
  font-size:15px;line-height:1.8;color:var(--t2);
  border-left:2px solid var(--accent-dark);
  margin-left:0;
}
.accordion .accordion-content p{margin:0}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--on-dark);
  padding:clamp(56px,7vw,96px) 0;
  text-align:center;
}
.cta-band::after{
  content:"";position:absolute;left:50%;top:-260px;transform:translateX(-50%);
  width:760px;height:520px;pointer-events:none;
  background:radial-gradient(ellipse at center,rgba(200,241,78,.16),transparent 68%);
}
.cta-band .cta-inner{position:relative;z-index:2;max-width:760px;margin:0 auto}
.cta-band h2{font-size:clamp(24px,3vw,38px);color:var(--on-dark)}
.cta-band p{margin-top:14px;font-size:16px;color:var(--on-dark-2)}
.cta-actions{margin-top:32px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-note{margin-top:20px;font-size:13px;color:var(--on-dark-3);letter-spacing:.02em}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-deep);color:var(--on-dark-2);
  border-top:1px solid var(--line-dark);
  padding:clamp(40px,5vw,64px) 0 0;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px}
.foot-col .brand{margin-bottom:16px}
.foot-desc{font-size:14px;line-height:1.8;color:var(--on-dark-2);max-width:26em}
.foot-badges{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.foot-badges span{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--line-dark);
  font-size:12px;letter-spacing:.04em;color:var(--on-dark-2);
}
.foot-col h4{
  font-size:14px;font-weight:600;letter-spacing:.08em;
  color:var(--on-dark-3);margin-bottom:16px;
}
.collapse-btn{display:none}
.foot-links li,.foot-contact li{font-size:14px;line-height:2}
.foot-links a{color:var(--on-dark-2);display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a:hover{color:var(--accent);transform:translateX(2px)}
.foot-contact li{color:var(--on-dark-2)}
.foot-contact .mono{color:var(--on-dark)}
.foot-bottom{
  border-top:1px solid var(--line-dark);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--on-dark-3);
}
.foot-bottom a{color:var(--on-dark-2)}
.foot-bottom a:hover{color:var(--accent)}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ============ 响应式 ============ */
@media screen and (max-width:1080px){
  .nav-menu{display:none}
  .menu-toggle{display:flex}
}
@media screen and (max-width:1024px){
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-item{border-left:0;padding-left:0;flex:1 1 45%}
  .stat-item:nth-child(2){border-left:1px solid var(--line-dark);padding-left:24px}
}
@media screen and (max-width:768px){
  .section{padding:56px 0}
  .cat-search{flex-direction:column;align-items:stretch}
  .cat-search .btn{width:100%}
  .tag-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
  .tag-row::-webkit-scrollbar{display:none}
  .tag-pill{flex:0 0 auto}
  .feed-row{flex-direction:column}
  .feed-row > [class*="large-"]{width:100%;padding:0 18px}
  .feed-media{margin-bottom:24px}
  .feed-row.reverse .feed-media{order:2;margin:24px 0 0}
  .sec-head{margin-bottom:28px}
  .channel-bar{gap:0}
  .channel-tabs{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:0;padding-bottom:24px}
  .foot-col{padding:4px 0}
  .foot-col h4{display:none}
  .collapse-btn{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    background:none;border:0;border-top:1px solid var(--line-dark);
    color:var(--on-dark);font-size:15px;font-weight:600;
    padding:18px 0;letter-spacing:.02em;
  }
  .collapse-btn::after{content:"+";font-size:20px;color:var(--accent);transition:transform .3s var(--ease)}
  .foot-col.is-open .collapse-btn::after{transform:rotate(45deg)}
  .foot-body{display:none;padding-bottom:16px}
  .foot-col.is-open .foot-body{display:block}
  .foot-col:first-child .foot-body{display:block}
  .foot-col:first-child{padding-bottom:20px;border-bottom:1px solid var(--line-dark)}
  .accordion .accordion-title{padding:20px 48px 20px 0;line-height:1.6;min-height:52px}
  .accordion .accordion-content{padding:0 16px 22px 16px}
}
@media screen and (max-width:640px){
  .header-actions .btn{display:none}
  .brand{font-size:17px}
  .stat-item{flex:1 1 100%;padding:16px 0;border-left:0 !important;padding-left:0 !important;border-top:1px solid var(--line-dark)}
  .stat-item:first-child{border-top:0}
  .cta-actions .btn{width:100%}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

.reveal{opacity:1;transform:none}