/* roulang page: index */
:root{
  --bg:#08070F;
  --bg-2:#100E1C;
  --panel:#15122A;
  --panel-2:#1D1934;
  --glass:rgba(16,14,28,.72);
  --primary:#7C5CFF;
  --primary-deep:#5B3BE0;
  --primary-light:#A78BFF;
  --accent:#2BE8C8;
  --hot:#FF4D9D;
  --text:#EDEBFF;
  --text-2:#A8A3C4;
  --text-3:#6F6A8C;
  --line:rgba(150,130,255,.14);
  --line-accent:rgba(43,232,200,.45);
  --success:#34D399;
  --warn:#FBBF24;
  --error:#F87171;
  --info:#7C5CFF;
  --light-block:#F4F2FF;
  --on-light:#15122A;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:12px;
  --r-pill:999px;
  --sh-1:0 16px 40px rgba(8,5,20,.55);
  --sh-2:0 16px 40px rgba(8,5,20,.55),0 0 0 1px rgba(124,92,255,.25);
  --sh-glow:0 24px 70px rgba(124,92,255,.22);
  --t:200ms cubic-bezier(.22,.61,.36,1);
  --font:"MiSans","HarmonyOS Sans SC","Alibaba PuHuiTi","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sec-pad:96px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(124,92,255,.12), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(43,232,200,.08), transparent 38%),
    radial-gradient(rgba(237,235,255,.05) 1px, transparent 1px);
  background-size:auto,auto,26px 26px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;object-fit:cover;background-color:var(--panel);border-radius:var(--r-md);}
a{color:var(--primary-light);text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t),transform var(--t);}
a:hover{color:var(--accent);}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--line-accent);outline-offset:3px;border-radius:var(--r-sm);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.3px;}
h1{font-size:clamp(34px,4.6vw,54px);font-weight:800;line-height:1.15;letter-spacing:-.5px;}
h2{font-size:clamp(24px,3vw,34px);font-weight:700;}
h3{font-size:20px;font-weight:600;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.mono{font-family:var(--mono);letter-spacing:-.4px;}
.section{padding:var(--sec-pad) 0;}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.5px;color:var(--accent);text-transform:uppercase;margin-bottom:14px;}
.kicker::before{content:"";width:28px;height:2px;background:var(--accent);border-radius:2px;}
.section-head.center .kicker::before{width:22px;}
.section-head p{color:var(--text-2);font-size:15px;margin-top:14px;margin-bottom:0;}
.muted{color:var(--text-2);}
.small{font-size:14px;color:var(--text-2);}
.tiny{font-size:12px;color:var(--text-3);letter-spacing:.5px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  border:1px solid transparent;position:relative;overflow:hidden;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),color var(--t),border-color var(--t);
}
.btn:active{transform:translateY(1px);}
.btn-primary{
  color:#0B0918;
  background:linear-gradient(120deg,var(--primary) 0%,var(--accent) 100%);
  box-shadow:0 12px 34px rgba(124,92,255,.32);
}
.btn-primary:hover{color:#0B0918;transform:translateY(-2px);box-shadow:0 18px 44px rgba(43,232,200,.3);}
.btn-ghost{color:var(--text);border-color:var(--line);background:rgba(21,18,42,.6);}
.btn-ghost:hover{color:var(--accent);border-color:var(--line-accent);transform:translateY(-2px);}
.btn-light{background:var(--on-light);color:#F4F2FF;}
.btn-light:hover{background:#241F42;color:#F4F2FF;}
.btn-outline-light{border-color:rgba(21,18,42,.24);color:var(--on-light);background:rgba(255,255,255,.6);}
.btn-outline-light:hover{border-color:var(--primary);color:var(--primary-deep);background:#fff;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-lg{min-height:60px;padding:0 34px;font-size:16px;}

/* 标签与徽章 */
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.5px;color:var(--text-2);border:1px solid var(--line);background:rgba(21,18,42,.66);}
.badge-accent{color:var(--accent);border-color:var(--line-accent);background:rgba(43,232,200,.08);}
.badge-hot{color:var(--hot);border-color:rgba(255,77,157,.35);background:rgba(255,77,157,.08);}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}

/* 悬浮胶囊导航 */
.site-header{position:fixed;top:18px;left:0;right:0;z-index:80;transition:top var(--t);}
.nav-shell{
  display:flex;align-items:center;gap:18px;
  padding:10px 12px 10px 20px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:0 14px 40px rgba(6,4,16,.6);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:padding var(--t),box-shadow var(--t),background-color var(--t);
}
.site-header.scrolled{top:10px;}
.site-header.scrolled .nav-shell{padding:6px 10px 6px 16px;background:rgba(10,8,22,.9);box-shadow:0 18px 46px rgba(6,4,16,.78);}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);
  display:grid;place-items:center;color:#0B0918;font-weight:800;font-size:15px;letter-spacing:-.5px;
}
.brand-name{font-size:16px;font-weight:700;color:var(--text);letter-spacing:.2px;white-space:nowrap;}
.brand-name:hover{color:var(--text);}
.brand-sub{display:block;font-size:11px;color:var(--text-3);letter-spacing:.6px;line-height:1;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:nowrap;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 13px;
  border-radius:var(--r-pill);font-size:14px;color:var(--text-2);white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:rgba(124,92,255,.12);}
.nav-links a.is-active{color:var(--text);background:rgba(124,92,255,.16);}
.nav-links a.is-active::after{content:"";position:absolute;left:50%;bottom:3px;width:16px;height:2px;margin-left:-8px;border-radius:2px;background:var(--accent);}
.nav-cta{margin-left:8px;flex-shrink:0;min-height:40px;padding:0 20px;font-size:14px;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-pill);border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-drawer{
  position:fixed;inset:0;z-index:120;display:none;
  background:rgba(8,7,15,.94);backdrop-filter:blur(10px);
  padding:28px 22px 40px;overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;}
.drawer-close{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);color:var(--text);font-size:20px;display:grid;place-items:center;}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:26px;}
.drawer-nav a{min-height:52px;display:flex;align-items:center;padding:0 18px;border-radius:var(--r-md);font-size:16px;color:var(--text);border:1px solid transparent;}
.drawer-nav a:hover,.drawer-nav a.is-active{background:rgba(124,92,255,.14);border-color:var(--line);color:var(--accent);}

/* Hero */
.hero{position:relative;padding:170px 0 70px;overflow:hidden;}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(237,235,255,.08) 1px,transparent 1px);
  background-size:34px 34px;opacity:.5;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.8),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.8),transparent 78%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-copy h1{margin:14px 0 20px;}
.hero-copy h1 em{font-style:normal;background:linear-gradient(100deg,var(--primary-light),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;}
.hero-visual{position:relative;}
.hero-frame{
  position:relative;border-radius:26px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-glow);aspect-ratio:4/3;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.hero-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.15),rgba(8,7,15,.72));}
.hero-shot{
  position:absolute;right:22px;bottom:-14px;width:70%;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(43,232,200,.28);box-shadow:var(--sh-1);
  transform:rotate(-2.2deg);z-index:3;background:var(--panel);
}
.hero-orb{
  position:absolute;top:-30px;left:-34px;width:150px;height:150px;border-radius:50%;
  border:1px solid rgba(124,92,255,.4);z-index:1;
}
.hero-orb.two{top:auto;bottom:-52px;left:auto;right:34%;width:96px;height:96px;border-color:rgba(43,232,200,.32);}

/* 数据条 */
.stats-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(16,14,28,.6);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:30px 26px;border-right:1px solid var(--line);position:relative;}
.stat-item:last-child{border-right:0;}
.stat-item::before{content:"";position:absolute;top:0;left:26px;width:36px;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));}
.stat-value{font-family:var(--mono);font-size:clamp(26px,2.6vw,34px);font-weight:700;color:var(--text);line-height:1.2;}
.stat-value small{font-size:14px;color:var(--text-2);margin-left:4px;font-weight:500;}
.stat-label{font-size:13px;color:var(--text-3);letter-spacing:.4px;margin-top:4px;}

/* 价值区 */
.value-list{border-top:1px solid var(--line);}
.value-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:56px 0;border-bottom:1px solid var(--line);}
.value-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.value-media img{width:100%;height:100%;aspect-ratio:16/11;}
.value-row:nth-child(even) .value-media{order:2;}
.value-num{font-family:var(--mono);font-size:44px;font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(124,92,255,.55);margin-bottom:16px;}
.value-row h3{margin-bottom:12px;}
.value-row p{color:var(--text-2);font-size:15px;margin-bottom:18px;}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);margin-bottom:9px;}
.tick-list li::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--accent);margin-top:9px;flex-shrink:0;}

/* 截图轮播 */
.shot-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:34px;}
.shot-nav{display:flex;gap:10px;}
.shot-arrow{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);color:var(--text);display:grid;place-items:center;font-size:16px;}
.shot-arrow:hover{color:var(--accent);border-color:var(--line-accent);transform:translateY(-2px);}
.shot-track{
  display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 32px 26px;margin:0 -32px;
  scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none;}
.shot-card{
  flex:0 0 calc((100% - 44px)/3);scroll-snap-align:start;
  border-radius:var(--r-lg);border:1px solid var(--line);background:var(--panel);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.shot-card:hover{transform:translateY(-4px);border-color:var(--line-accent);box-shadow:var(--sh-2);}
.shot-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--panel-2);}
.shot-bar i{width:9px;height:9px;border-radius:50%;background:rgba(237,235,255,.22);display:block;}
.shot-bar i:first-child{background:rgba(255,77,157,.6);}
.shot-bar span{margin-left:8px;font-size:12px;color:var(--text-3);font-family:var(--mono);}
.shot-card img{width:100%;aspect-ratio:16/10;}
.shot-body{padding:18px 20px 22px;}
.shot-body h3{font-size:17px;margin-bottom:6px;}
.shot-body p{font-size:14px;color:var(--text-2);margin:0;}
.shot-dots{display:flex;justify-content:center;gap:9px;margin-top:6px;}
.shot-dots button{width:8px;height:8px;border-radius:50%;background:rgba(237,235,255,.2);transition:all var(--t);}
.shot-dots button.is-active{background:var(--accent);width:24px;border-radius:var(--r-pill);}

/* 系统要求 */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.req-card{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel);padding:30px;box-shadow:var(--sh-1);}
.req-card-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line);}
.req-card-head h3{font-size:19px;}
.req-rows{display:flex;flex-direction:column;}
.req-row{display:flex;align-items:baseline;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;}
.req-row:last-child{border-bottom:0;}
.req-key{color:var(--text-3);flex:0 0 108px;}
.req-val{color:var(--text-2);flex:1;}
.req-val strong{color:var(--text);font-weight:600;}
.req-reco{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--accent);}
.req-min{font-size:12px;color:var(--text-3);}
.req-split{height:1px;background:var(--line);margin:20px 0 16px;}

/* 评价墙 */
.review-grid{columns:3;column-gap:22px;}
.review-card{break-inside:avoid;margin-bottom:22px;padding:24px;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--panel);box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t);}
.review-card:hover{transform:translateY(-4px);border-color:rgba(124,92,255,.4);}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.review-avatar{width:44px;height:44px;border-radius:var(--r-sm);background:linear-gradient(135deg,var(--primary),var(--accent));display:grid;place-items:center;color:#0B0918;font-weight:700;flex-shrink:0;}
.review-name{font-size:15px;font-weight:600;color:var(--text);}
.review-meta{font-size:12px;color:var(--text-3);}
.stars{color:var(--accent);letter-spacing:2px;font-size:13px;margin-bottom:10px;}
.review-card p{font-size:14px;color:var(--text-2);margin:0;}

/* 下载区 */
.download-section{padding:var(--sec-pad) 0;background:var(--light-block);color:var(--on-light);position:relative;overflow:hidden;}
.download-section::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(21,18,42,.05) 0 1px,transparent 1px 7px);
  opacity:.5;
}
.download-inner{position:relative;z-index:2;}
.download-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;}
.download-copy h2{color:var(--on-light);margin-bottom:14px;}
.download-copy p{color:#403A63;font-size:15px;max-width:520px;}
.download-buttons{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 16px;}
.download-buttons .btn-primary{background:linear-gradient(120deg,var(--primary-deep),var(--primary));color:#F7F5FF;box-shadow:0 14px 34px rgba(91,59,224,.36);}
.download-buttons .btn-primary:hover{color:#F7F5FF;}
.download-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.download-note{font-size:13px;color:#5B547E;font-family:var(--mono);word-break:break-all;}
.download-card{background:#fff;border-radius:var(--r-lg);padding:28px;box-shadow:0 20px 54px rgba(60,40,140,.14);border:1px solid rgba(21,18,42,.08);}
.download-card h3{font-size:17px;color:var(--on-light);margin-bottom:16px;}
.dl-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px dashed rgba(21,18,42,.12);font-size:14px;}
.dl-row:last-child{border-bottom:0;}
.dl-row span:first-child{color:#5B547E;}
.dl-row span:last-child{font-family:var(--mono);color:var(--on-light);font-weight:600;}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--panel);box-shadow:var(--sh-1);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);color:var(--text);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-accent);box-shadow:var(--sh-2);color:var(--text);}
.news-card img{width:100%;aspect-ratio:16/9;border-radius:0;}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-3);}
.news-tag{padding:3px 10px;border-radius:var(--r-pill);border:1px solid var(--line-accent);color:var(--accent);font-size:12px;letter-spacing:.4px;}
.news-body h3{font-size:17px;line-height:1.5;}
.news-body p{font-size:14px;color:var(--text-2);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-more{color:var(--primary-light);font-size:13px;margin-top:auto;}
.news-foot{display:flex;justify-content:center;margin-top:38px;}
.news-empty{
  text-align:center;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--r-lg);background:rgba(21,18,42,.5);
}
.news-empty .empty-mark{
  width:64px;height:64px;margin:0 auto 18px;border-radius:50%;
  border:1px solid var(--line-accent);display:grid;place-items:center;color:var(--accent);font-size:26px;font-family:var(--mono);
}
.news-empty p{color:var(--text-2);margin-bottom:20px;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);overflow:hidden;transition:border-color var(--t);}
.faq-item[open]{border-color:var(--line-accent);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;cursor:pointer;font-size:16px;font-weight:600;color:var(--text);list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--accent);border-radius:2px;transition:transform var(--t);}
.faq-icon::before{top:9px;left:1px;width:18px;height:2px;}
.faq-icon::after{left:9px;top:1px;width:2px;height:18px;}
.faq-item[open] .faq-icon::after{transform:scaleY(0);}
.faq-body{padding:0 22px 22px;color:var(--text-2);font-size:15px;line-height:1.9;}
.faq-body p{margin:0;}

/* CTA */
.cta-band{padding:64px 0;}
.cta-card{
  border-radius:26px;padding:48px;
  background:linear-gradient(120deg,rgba(91,59,224,.95),rgba(43,232,200,.85));
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:var(--sh-glow);
}
.cta-card h2{color:#0B0918;margin-bottom:10px;font-size:clamp(22px,2.6vw,30px);}
.cta-card p{color:rgba(11,9,24,.78);margin:0;font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{position:relative;border-top:1px solid var(--line);background:var(--bg-2);padding:72px 0 26px;overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(237,235,255,.06) 1px,transparent 1px);
  background-size:30px 30px;opacity:.6;
}
.footer-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;border-bottom:1px solid var(--line);}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.4px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary-light);text-decoration:underline;text-underline-offset:4px;}
.footer-desc{font-size:14px;color:var(--text-2);max-width:360px;margin-bottom:18px;}
.footer-bottom{position:relative;z-index:2;padding-top:24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);background:var(--glass);color:var(--text);
  backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all var(--t);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--accent);border-color:var(--line-accent);}

/* 响应式 */
@media (max-width:1279px){
  .shot-card{flex:0 0 calc((100% - 22px)/2);}
}
@media (max-width:1023px){
  :root{--sec-pad:72px;}
  .nav-links a{padding:0 10px;font-size:13px;}
  .nav-cta{display:none;}
  .hero{padding:150px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-frame{aspect-ratio:16/10;}
  .hero-shot{width:56%;right:16px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .value-row{gap:34px;padding:44px 0;}
  .req-grid{grid-template-columns:1fr;}
  .review-grid{columns:2;}
  .download-grid{grid-template-columns:1fr;gap:32px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  :root{--sec-pad:56px;}
  .container{padding:0 18px;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-shell{padding:8px 10px 8px 14px;}
  .brand-name{font-size:15px;}
  .brand-sub{display:none;}
  .hero{padding:130px 0 46px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .hero-shot{position:relative;right:auto;bottom:auto;width:100%;transform:none;margin-top:-56px;}
  .shot-track{padding:6px 18px 24px;margin:0 -18px;}
  .shot-card{flex:0 0 84%;}
  .value-row{grid-template-columns:1fr;gap:22px;padding:36px 0;}
  .value-row:nth-child(even) .value-media{order:0;}
  .review-grid{columns:1;}
  .news-grid{grid-template-columns:1fr;}
  .cta-card{padding:32px 24px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .download-buttons .btn{width:100%;}
  .download-actions .btn{width:100%;}
  .dl-row{flex-direction:column;align-items:flex-start;gap:4px;}
}
@media (max-width:520px){
  .stats-grid{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);}
  .faq-item summary{font-size:15px;padding:16px 18px;}
  .faq-body{padding:0 18px 18px;}
  .req-card{padding:22px;}
}

/* roulang page: article */
:root{
  --bg:#08070F;
  --bg-2:#100E1C;
  --panel:#15122A;
  --panel-hi:#1D1934;
  --glass:rgba(16,14,28,.72);
  --primary:#7C5CFF;
  --primary-dark:#5B3BE0;
  --primary-light:#A78BFF;
  --accent:#2BE8C8;
  --hot:#FF4D9D;
  --text:#EDEBFF;
  --text-2:#A8A3C4;
  --text-3:#6F6A8C;
  --line:rgba(150,130,255,.14);
  --line-hi:rgba(43,232,200,.45);
  --success:#34D399;
  --warn:#FBBF24;
  --error:#F87171;
  --light:#F4F2FF;
  --light-text:#15122A;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow-1:0 16px 40px rgba(8,5,20,.55);
  --shadow-2:0 16px 40px rgba(8,5,20,.55), 0 0 0 1px rgba(124,92,255,.25);
  --shadow-3:0 24px 70px rgba(124,92,255,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:200ms cubic-bezier(.22,.61,.36,1);
  --font:"MiSans","HarmonyOS Sans SC","Alibaba PuHuiTi 3","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(237,235,255,.06) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.6;
}
img{max-width:100%;display:block;object-fit:cover;background:var(--panel);border-radius:var(--r-md);}
a{color:var(--primary-light);text-decoration:none;transition:color var(--t),text-underline-offset var(--t);}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.3px;line-height:1.25;}
p{margin:0 0 18px;}
ul,ol{margin:0 0 18px;padding-left:0;}
ul{list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px;}
::selection{background:rgba(124,92,255,.4);color:#fff;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--panel);color:var(--text);padding:10px 16px;border-radius:0 0 var(--r-sm) 0;z-index:200;}
.skip-link:focus{left:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-pill);font-size:15px;font-weight:600;line-height:1;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
}
.btn:hover{text-decoration:none;}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.btn:active{transform:translateY(0) scale(.99);}
.btn.is-disabled,.btn[disabled]{opacity:.45;pointer-events:none;}
.btn-primary{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,var(--primary),var(--accent));
  color:#0A0818;
  box-shadow:0 12px 30px rgba(124,92,255,.28);
}
.btn-primary:hover{color:#0A0818;transform:translateY(-2px);box-shadow:0 18px 44px rgba(124,92,255,.4);}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-18deg);transition:left 520ms var(--ease);
}
.btn-primary:hover::after{left:120%;}
.btn-ghost{background:rgba(124,92,255,.08);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--line-hi);color:var(--accent);transform:translateY(-2px);text-decoration:none;}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.5px;border:1px solid var(--line);
  background:rgba(124,92,255,.10);color:var(--primary-light);white-space:nowrap;
}
.badge-accent{color:var(--accent);border-color:var(--line-hi);background:rgba(43,232,200,.08);}
.badge-hot{color:var(--hot);border-color:rgba(255,77,157,.35);background:rgba(255,77,157,.08);}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:18px 0 0;transition:padding var(--t);}
.site-header.is-scrolled{padding-top:10px;}
.nav-shell{
  display:flex;align-items:center;gap:16px;
  padding:10px 14px 10px 18px;border-radius:var(--r-pill);
  background:var(--glass);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled .nav-shell{box-shadow:0 20px 50px rgba(6,4,16,.7),0 0 0 1px rgba(124,92,255,.18);}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;flex-shrink:0;}
.brand:hover{color:var(--text);text-decoration:none;}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#0B0918;font-weight:800;font-size:12px;letter-spacing:.5px;
}
.brand-name{display:block;font-size:15px;font-weight:800;letter-spacing:-.2px;line-height:1.2;}
.brand-sub{display:block;font-size:11px;color:var(--text-3);letter-spacing:1px;line-height:1.3;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-links a{
  position:relative;padding:9px 11px;border-radius:var(--r-pill);
  color:var(--text-2);font-size:14px;white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav-links a:hover{color:var(--text);background:rgba(124,92,255,.12);text-decoration:none;}
.nav-links a.is-active{color:var(--accent);}
.nav-links a.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta{margin-left:10px;padding:11px 20px;font-size:14px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-pill);flex-shrink:0;
  border:1px solid var(--line);background:rgba(124,92,255,.10);
  margin-left:auto;position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text);border-radius:2px;
  transform:translateX(-50%);transition:transform var(--t),opacity var(--t),background var(--t);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;}
.nav-toggle span::after{content:"";top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{top:0;transform:translateX(-50%) rotate(45deg);}
.nav-toggle.is-open span::after{top:0;transform:translateX(-50%) rotate(-45deg);}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;padding:34px 0 26px;overflow:hidden;}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,7,15,.62) 0%,rgba(8,7,15,.9) 62%,var(--bg) 100%),
             url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.55;
}
.article-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(43,232,200,.16);
  box-shadow:inset 0 0 120px rgba(124,92,255,.14);
  pointer-events:none;
}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:var(--text-3);opacity:.6;}
.breadcrumb .current{
  color:var(--text-3);max-width:min(420px,52vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.article-head-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.meta-item{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-3);
  font-family:var(--mono);letter-spacing:.2px;
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6;}
.article-title{
  font-size:clamp(28px,3.9vw,46px);
  font-weight:800;line-height:1.2;letter-spacing:-.6px;
  max-width:920px;margin-bottom:20px;
}
.article-head-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

/* ---------- 正文网格 ---------- */
.article-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:48px;
  align-items:start;
  padding-top:44px;
}
.article-main{max-width:760px;justify-self:center;width:100%;min-height:280px;}
.article-body{font-size:16px;line-height:1.9;color:var(--text);}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:clamp(21px,2.2vw,27px);font-weight:700;
  margin:56px 0 18px;padding-left:16px;letter-spacing:-.3px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.35em;width:4px;height:1em;border-radius:4px;
  background:linear-gradient(180deg,var(--accent),var(--primary));
}
.article-body h3{font-size:19px;font-weight:600;margin:38px 0 14px;color:var(--text);}
.article-body h4{font-size:17px;font-weight:600;margin:28px 0 12px;color:var(--text-2);}
.article-body p{margin:0 0 20px;color:var(--text-2);}
.article-body strong{color:var(--text);font-weight:600;}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
.article-body a:hover{color:var(--primary-light);}
.article-body ul,
.article-body ol{margin:0 0 22px;padding-left:4px;color:var(--text-2);}
.article-body li{position:relative;padding-left:24px;margin-bottom:10px;}
.article-body ul > li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--accent),var(--primary));transform:rotate(45deg);
}
.article-body ol{counter-reset:li;}
.article-body ol > li{counter-increment:li;}
.article-body ol > li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--mono);font-size:13px;
  color:var(--accent);letter-spacing:-.5px;line-height:1.9;
}
.article-body blockquote{
  margin:0 0 24px;padding:16px 20px;border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  background:linear-gradient(90deg,rgba(43,232,200,.08),rgba(43,232,200,0));
  color:var(--text);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-md);margin:24px 0;width:100%;height:auto;box-shadow:var(--shadow-1);}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-body code{
  font-family:var(--mono);font-size:.9em;padding:2px 7px;border-radius:8px;
  background:var(--panel-hi);color:var(--accent);border:1px solid var(--line);
}
.article-body pre{
  margin:0 0 24px;padding:18px 20px;border-radius:var(--r-md);
  background:#06050D;border:1px solid var(--line);
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  font-family:var(--mono);font-size:13.5px;line-height:1.75;color:#CFC9F5;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;font-size:inherit;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0;}
.article-body .table-wrap{overflow-x:auto;margin:0 0 24px;}
.article-body table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:480px;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{color:var(--text);background:var(--panel);font-weight:600;}
.article-body td{color:var(--text-2);}

/* ---------- 空态 ---------- */
.empty-state{
  padding:64px 28px;text-align:center;border:1px dashed var(--line);
  border-radius:var(--r-lg);background:var(--bg-2);
}
.empty-mark{
  width:64px;height:64px;margin:0 auto 20px;border-radius:20px;
  background:linear-gradient(135deg,rgba(124,92,255,.35),rgba(43,232,200,.25));
  display:grid;place-items:center;
}
.empty-mark::after{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;box-shadow:0 -8px 0 var(--accent),0 8px 0 var(--accent);}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--text-2);max-width:420px;margin:0 auto 24px;}

/* ---------- 文末标签与分享 ---------- */
.article-foot{
  margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.share-row{display:flex;align-items:center;gap:10px;}
.share-row span{font-size:13px;color:var(--text-3);}
.share-btn{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(124,92,255,.08);color:var(--text-2);
  cursor:pointer;transition:color var(--t),border-color var(--t),transform var(--t);
}
.share-btn:hover{color:var(--accent);border-color:var(--line-hi);transform:translateY(-2px);}
.share-btn svg{width:17px;height:17px;fill:currentColor;}
.copy-tip{font-size:12px;color:var(--accent);opacity:0;transition:opacity var(--t);}
.copy-tip.is-on{opacity:1;}

/* ---------- 侧栏下载卡 ---------- */
.side-col{position:sticky;top:96px;display:grid;gap:20px;}
.side-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:17px;margin-bottom:10px;}
.side-card p{font-size:13.5px;color:var(--text-3);line-height:1.7;margin-bottom:18px;}
.side-kv{display:grid;gap:0;margin:0 0 20px;}
.side-kv .row{
  display:flex;justify-content:space-between;gap:12px;padding:10px 0;
  border-bottom:1px dotted var(--line);font-size:13.5px;
}
.side-kv .row:last-child{border-bottom:0;}
.side-kv .k{color:var(--text-3);}
.side-kv .v{color:var(--text);font-family:var(--mono);font-size:13px;letter-spacing:-.2px;}
.side-links{display:grid;gap:10px;margin-top:6px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--bg-2);color:var(--text-2);font-size:14px;
}
.side-links a:hover{color:var(--accent);border-color:var(--line-hi);text-decoration:none;transform:translateX(2px);}
.side-note{font-size:12px;color:var(--text-3);font-family:var(--mono);letter-spacing:.2px;}

/* ---------- 板块通用 ---------- */
.section{padding:84px 0;position:relative;}
.section-head{max-width:680px;margin-bottom:38px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1.4px;
  color:var(--accent);text-transform:uppercase;margin-bottom:14px;font-family:var(--mono);
}
.section-head .eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--accent);}
.section-head h2{font-size:clamp(23px,2.8vw,32px);margin-bottom:14px;letter-spacing:-.4px;}
.section-head p{color:var(--text-2);font-size:15px;margin:0;}

/* ---------- 相关推荐 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);color:var(--text);text-decoration:none;
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--shadow-2);text-decoration:none;color:var(--text);}
.card-thumb{aspect-ratio:16/10;width:100%;border-radius:0;background:var(--panel-hi);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;line-height:1.5;}
.card-body p{font-size:14px;color:var(--text-2);margin:0;line-height:1.75;}
.card-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--text-3);font-family:var(--mono);margin-top:auto;padding-top:6px;}

/* ---------- 返回栏目 / 双入口 ---------- */
.nav-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:36px;}
.nav-next a{
  display:flex;flex-direction:column;gap:8px;padding:22px 24px;
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--bg-2);
  color:var(--text);transition:border-color var(--t),transform var(--t),background var(--t);
}
.nav-next a:hover{border-color:var(--line-hi);transform:translateY(-3px);text-decoration:none;background:var(--panel);}
.nav-next .kicker{font-size:12px;color:var(--text-3);letter-spacing:1px;font-family:var(--mono);}
.nav-next .val{font-size:15.5px;font-weight:600;line-height:1.5;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);
  overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item[open]{border-color:var(--line-hi);box-shadow:var(--shadow-1);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;cursor:pointer;font-size:16px;font-weight:600;list-style:none;
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--accent);}
.faq-icon{
  position:relative;flex-shrink:0;width:20px;height:20px;border-radius:50%;
  border:1px solid var(--line);transition:transform var(--t),border-color var(--t);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);
  transform:translate(-50%,-50%);border-radius:2px;transition:opacity var(--t);
}
.faq-icon::before{width:10px;height:2px;}
.faq-icon::after{width:2px;height:10px;}
.faq-item[open] .faq-icon{border-color:var(--line-hi);transform:rotate(180deg);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-body{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.85;}
.faq-body p:last-child{margin-bottom:0;}

/* ---------- CTA 反白条 ---------- */
.cta-band{padding:0 0 90px;}
.cta-inner{
  position:relative;overflow:hidden;
  background:var(--light);color:var(--light-text);
  border-radius:28px;padding:52px 48px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  box-shadow:var(--shadow-3);
}
.cta-inner::after{
  content:"";position:absolute;right:-80px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,.25),transparent 65%);
}
.cta-inner h2{font-size:clamp(22px,2.6vw,31px);color:var(--light-text);margin-bottom:12px;letter-spacing:-.4px;}
.cta-inner p{color:#4A4570;font-size:15px;margin:0;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}
.cta-inner .btn-primary{box-shadow:0 14px 34px rgba(91,59,224,.32);}
.cta-inner .btn-ghost{background:rgba(21,18,42,.06);border-color:rgba(21,18,42,.16);color:var(--light-text);}
.cta-inner .btn-ghost:hover{border-color:var(--primary-dark);color:var(--primary-dark);}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;border-top:1px solid var(--line);background:var(--bg-2);
  padding:66px 0 30px;margin-top:0;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(237,235,255,.05) 1px,transparent 1px);
  background-size:32px 32px;opacity:.7;
}
.footer-grid{
  position:relative;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:38px;border-bottom:1px solid var(--line);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-name{font-size:16px;font-weight:800;}
.footer-desc{font-size:13.5px;color:var(--text-3);line-height:1.8;margin:0 0 12px;max-width:320px;}
.tiny{font-size:12.5px;color:var(--text-3);font-family:var(--mono);letter-spacing:.2px;margin:0;}
.footer-col h4{font-size:14px;color:var(--text);margin:0 0 16px;letter-spacing:.3px;}
.footer-col ul{list-style:none;display:grid;gap:11px;margin:0;padding:0;}
.footer-col li{margin:0;padding:0;}
.footer-col a{font-size:13.5px;color:var(--text-3);}
.footer-col a:hover{color:var(--primary-light);text-decoration:none;}
.footer-bottom{
  position:relative;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding-top:22px;font-size:13px;color:var(--text-3);
}
#backTop{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(12px);
  color:var(--text-2);cursor:pointer;display:grid;place-items:center;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),color var(--t),border-color var(--t);
}
#backTop.is-on{opacity:1;visibility:visible;transform:none;}
#backTop:hover{color:var(--accent);border-color:var(--line-hi);}
#backTop svg{width:16px;height:16px;fill:currentColor;}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links a{padding:9px 8px;font-size:13.5px;}
  .brand-sub{display:none;}
  .nav-cta{padding:10px 16px;font-size:13.5px;}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .article-wrap{grid-template-columns:minmax(0,1fr);gap:34px;padding-top:34px;}
  .side-col{position:static;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .section{padding:72px 0;}
  .cta-inner{grid-template-columns:minmax(0,1fr);padding:44px 34px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px;}
}
@media (max-width:900px){
  .nav-shell{position:relative;padding:9px 10px 9px 14px;}
  .nav-toggle{display:block;}
  .nav-links{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:14px;border-radius:24px;
    background:rgba(12,10,24,.97);backdrop-filter:blur(18px);
    border:1px solid var(--line);box-shadow:var(--shadow-2);
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity var(--t),transform var(--t),visibility var(--t);
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:none;}
  .nav-links a{width:100%;padding:14px 16px;font-size:16px;border-radius:var(--r-md);}
  .nav-links a.is-active{background:rgba(43,232,200,.10);}
  .nav-links a.is-active::after{display:none;}
  .nav-cta{margin-left:6px;}
  .breadcrumb .current{max-width:56vw;}
  .side-col{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .article-hero{padding:22px 0 18px;}
  .article-title{font-size:clamp(24px,6.4vw,32px);}
  .article-wrap{padding-top:26px;gap:28px;}
  .article-body{font-size:15.5px;}
  .article-body h2{margin-top:44px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .nav-next{grid-template-columns:minmax(0,1fr);}
  .btn{width:100%;}
  .btn.btn-inline{width:auto;}
  .article-head-actions{width:100%;}
  .cta-inner{padding:34px 22px;border-radius:22px;}
  .cta-actions{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;padding-bottom:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  #backTop{right:14px;bottom:14px;}
}
@media (max-width:520px){
  .brand-name{font-size:13.5px;}
  .brand-mark{width:34px;height:34px;font-size:11px;}
  .nav-cta{padding:9px 13px;font-size:13px;}
  .breadcrumb{font-size:12px;gap:6px;}
  .breadcrumb .current{max-width:42vw;}
  .side-card{padding:20px;}
  .faq-item summary{padding:16px 16px;font-size:15px;}
  .faq-body{padding:0 16px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --bg:#08070F;--bg-2:#100E1C;--panel:#15122A;--panel-2:#1D1934;
  --glass:rgba(16,14,28,.72);
  --primary:#7C5CFF;--primary-dark:#5B3BE0;--primary-light:#A78BFF;
  --accent:#2BE8C8;--hot:#FF4D9D;
  --text:#EDEBFF;--text-2:#A8A3C4;--text-3:#6F6A8C;
  --line:rgba(150,130,255,.14);--line-active:rgba(43,232,200,.45);
  --ok:#34D399;--warn:#FBBF24;--err:#F87171;
  --light:#F4F2FF;--light-text:#15122A;
  --r-lg:20px;--r-md:16px;--r-sm:13px;--r-pill:999px;
  --sh-1:0 16px 40px rgba(8,5,20,.55);
  --sh-2:0 16px 40px rgba(8,5,20,.55),0 0 0 1px rgba(124,92,255,.25);
  --sh-glow:0 24px 70px rgba(124,92,255,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"MiSans","HarmonyOS Sans SC","阿里巴巴普惠体","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sp:clamp(56px,7vw,96px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(circle at 12% 6%,rgba(124,92,255,.16),transparent 45%),
    radial-gradient(circle at 88% 0%,rgba(43,232,200,.10),transparent 42%),
    radial-gradient(rgba(237,235,255,.05) 1px,transparent 1px);
  background-size:auto,auto,26px 26px;
  opacity:.9;
}
img{max-width:100%;display:block;border-radius:var(--r-md)}
a{color:var(--primary-light);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
button{font-family:inherit;font-size:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.3px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1}
.mono{font-family:var(--font-mono);letter-spacing:-.4px}

/* ---------- header / nav ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80;padding:18px 0;transition:padding .25s var(--ease)}
.site-header.is-scrolled{padding:10px 0}
.nav-shell{
  display:flex;align-items:center;gap:18px;
  background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);border-radius:var(--r-pill);
  padding:10px 12px 10px 18px;transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-scrolled .nav-shell{box-shadow:var(--sh-1);background:rgba(10,8,20,.86)}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none;flex-shrink:0}
.brand:hover{color:var(--text);text-decoration:none}
.brand-mark{
  width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--primary),var(--accent));
  color:#0B0918;font-weight:800;font-size:15px;letter-spacing:-.5px;flex-shrink:0;
}
.brand-name{display:block;font-weight:700;font-size:16px;letter-spacing:-.2px}
.brand-sub{display:block;font-size:11px;color:var(--text-3);letter-spacing:.6px;line-height:1.4}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:nowrap}
.nav-links a{
  position:relative;color:var(--text-2);font-size:14px;padding:9px 12px;border-radius:var(--r-pill);
  white-space:nowrap;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(124,92,255,.12);text-decoration:none}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--accent);
}
.nav-cta{flex-shrink:0}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:14px;background:transparent;position:relative;flex-shrink:0}
.nav-toggle span{position:absolute;left:13px;top:21px;width:18px;height:2px;background:var(--text-2);border-radius:2px;transition:background .2s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-2);border-radius:2px;transition:transform .25s var(--ease),top .25s var(--ease)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-shell.is-open .nav-toggle span{background:transparent}
.nav-shell.is-open .nav-toggle span::before{top:0;transform:rotate(45deg);background:var(--accent)}
.nav-shell.is-open .nav-toggle span::after{top:0;transform:rotate(-45deg);background:var(--accent)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);border:1px solid transparent;
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  position:relative;overflow:hidden;min-height:44px;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none}
.btn-primary{background:linear-gradient(120deg,var(--primary-dark),var(--primary) 45%,var(--accent));color:#0B0918;font-weight:700;box-shadow:0 14px 34px rgba(124,92,255,.28)}
.btn-primary:hover{color:#0B0918;box-shadow:0 18px 44px rgba(124,92,255,.4)}
.btn-ghost{background:rgba(124,92,255,.08);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{color:var(--text);border-color:var(--line-active);background:rgba(43,232,200,.1)}
.btn-light{background:var(--light-text);color:var(--light)}
.btn-light:hover{color:var(--light);box-shadow:var(--sh-1)}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- section basics ---------- */
.section{padding:var(--sp) 0;position:relative}
.section-tight{padding:calc(var(--sp) * .62) 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1.4px;text-transform:uppercase;color:var(--accent);font-weight:600}
.kicker::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px}
.h2{font-size:clamp(24px,3vw,34px);font-weight:700;margin-top:14px}
.section-sub{margin-top:14px;color:var(--text-2);font-size:15.5px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 15px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(124,92,255,.1);color:var(--accent);font-size:12.5px;letter-spacing:1px}

/* ---------- hero ---------- */
.cat-hero{position:relative;padding:clamp(140px,17vw,196px) 0 72px;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-hero-bg{position:absolute;inset:0;z-index:0}
.cat-hero-bg img{width:100%;height:100%;object-fit:cover;border-radius:0;opacity:.4}
.cat-hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.72),rgba(8,7,15,.9) 55%,var(--bg))}
.orbit{position:absolute;right:-90px;top:-60px;width:520px;height:520px;border-radius:50%;border:1px solid rgba(124,92,255,.25);z-index:0;pointer-events:none}
.orbit::after{content:"";position:absolute;inset:70px;border-radius:50%;border:1px solid rgba(43,232,200,.18)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:center}
.h1{font-size:clamp(34px,4.6vw,54px);font-weight:800;line-height:1.15;letter-spacing:-.5px;margin:22px 0 0}
.h1 em{font-style:normal;color:var(--accent)}
.lead{margin-top:18px;color:var(--text-2);font-size:17px;max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.4px;color:var(--text-2);
  border:1px solid var(--line);border-radius:var(--r-sm);padding:6px 12px;background:rgba(21,18,42,.7);
}
.badge b{color:var(--accent);font-weight:600}
.hero-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px;box-shadow:var(--sh-2);
}
.hero-panel img{aspect-ratio:16/10;object-fit:cover;background:var(--panel-2)}
.panel-caption{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;font-size:13px;color:var(--text-3)}
.panel-caption b{color:var(--text);font-weight:600;font-size:14px}

/* ---------- metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-lg);background:linear-gradient(180deg,rgba(21,18,42,.85),rgba(16,14,28,.65));overflow:hidden;margin-top:52px}
.metric{padding:26px 24px;border-right:1px solid var(--line);position:relative}
.metric:last-child{border-right:0}
.metric-num{font-family:var(--font-mono);font-size:clamp(26px,3vw,34px);font-weight:700;color:var(--text);line-height:1}
.metric-num span{color:var(--accent);font-size:.6em;margin-left:2px}
.metric-label{margin-top:10px;font-size:13px;color:var(--text-3);letter-spacing:.4px}

/* ---------- layout 2/3 + 1/3 ---------- */
.layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:32px;align-items:start;margin-top:8px}
.stack{display:grid;gap:24px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:var(--line-active);box-shadow:var(--sh-2)}
.card-row{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:24px;align-items:center}
.card h3{font-size:20px;font-weight:600;margin-bottom:12px}
.card p{color:var(--text-2);font-size:15px}
.card-media img{aspect-ratio:4/3;object-fit:cover;background:var(--panel-2)}
.card-tag{display:inline-block;font-size:12px;letter-spacing:.6px;color:var(--accent);border:1px solid var(--line-active);border-radius:var(--r-sm);padding:4px 10px;margin-bottom:14px}
.kv-list{margin-top:18px;border-top:1px solid var(--line)}
.kv-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.kv-row:last-child{border-bottom:0}
.kv-key{color:var(--text-3)}
.kv-val{font-family:var(--font-mono);color:var(--text);font-size:13.5px;text-align:right}
.kv-val.ok{color:var(--accent)}
.kv-val.warn{color:var(--warn)}

/* ---------- rail ---------- */
.rail{position:sticky;top:104px;display:grid;gap:20px}
.rail-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1)}
.rail-card h3{font-size:16.5px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.rail-card h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--accent)}
.rail-list{display:grid;gap:11px}
.rail-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.rail-list li::before{content:"›";color:var(--accent);font-weight:700;line-height:1.5}
.rail-dl{background:linear-gradient(160deg,rgba(124,92,255,.22),rgba(43,232,200,.12)),var(--panel);border-color:rgba(124,92,255,.3)}
.rail-dl .meta{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:12.5px;color:var(--text-2);padding:8px 0;border-bottom:1px dashed var(--line)}
.rail-dl .btn{width:100%;margin-top:16px}
.rail-note{margin-top:12px;font-size:12.5px;color:var(--text-3);line-height:1.7}
.rail-links{display:grid;gap:2px}
.rail-links a{display:flex;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--text-2);border:1px solid transparent;transition:all .2s var(--ease)}
.rail-links a:hover{background:rgba(124,92,255,.1);border-color:var(--line);color:var(--text);text-decoration:none}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;position:relative;overflow:hidden}
.step-num{font-family:var(--font-mono);font-size:30px;font-weight:700;color:rgba(124,92,255,.55);line-height:1}
.step h3{font-size:17px;font-weight:600;margin:14px 0 8px}
.step p{font-size:14px;color:var(--text-2)}
.step::after{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:.5}

/* ---------- bars ---------- */
.bars{display:grid;gap:20px;margin-top:34px}
.bar-row{display:grid;grid-template-columns:200px minmax(0,1fr) 92px;gap:18px;align-items:center}
.bar-name{font-size:14.5px;color:var(--text-2)}
.bar-track{height:12px;border-radius:var(--r-pill);background:var(--panel-2);border:1px solid var(--line);overflow:hidden}
.bar-fill{height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--primary),var(--primary-light))}
.bar-fill.accent{background:linear-gradient(90deg,var(--primary),var(--accent))}
.bar-fill.hot{background:linear-gradient(90deg,var(--hot),var(--primary-light))}
.bar-val{font-family:var(--font-mono);font-size:15px;text-align:right;color:var(--text)}
.bar-val b{color:var(--accent)}

.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{font-size:13px;color:var(--text-2);border:1px solid var(--line);border-radius:var(--r-pill);padding:8px 16px;background:rgba(21,18,42,.7);transition:all .2s var(--ease)}
.tag:hover{border-color:var(--line-active);color:var(--text)}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:860px;margin:0 auto}
.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s var(--ease)}
.faq-item.open{border-color:var(--line-active)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;color:var(--text);text-align:left;
  padding:20px 22px;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-q:hover{color:var(--accent)}
.faq-icon{position:relative;width:22px;height:22px;flex-shrink:0;border:1px solid var(--line);border-radius:50%;transition:transform .25s var(--ease),border-color .25s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--text-2);border-radius:2px;transform:translate(-50%,-50%)}
.faq-icon::before{width:10px;height:1.6px}
.faq-icon::after{width:1.6px;height:10px;transition:opacity .25s var(--ease)}
.faq-item.open .faq-icon{border-color:var(--line-active);transform:rotate(180deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-item.open .faq-icon::before{background:var(--accent)}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .3s var(--ease),opacity .3s var(--ease),padding .3s var(--ease)}
.faq-item.open .faq-a{max-height:340px;opacity:1;padding:0 22px 22px}
.faq-a p{color:var(--text-2);font-size:15px;max-width:70ch}

/* ---------- cta band ---------- */
.cta-band{background:var(--light);color:var(--light-text);border-radius:var(--r-lg);padding:clamp(34px,5vw,56px);box-shadow:var(--sh-glow);position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;border:1px solid rgba(124,92,255,.35)}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;position:relative;z-index:1}
.cta-band h2{font-size:clamp(23px,2.8vw,30px);font-weight:700;color:var(--light-text)}
.cta-band p{margin-top:12px;color:#4A4566;font-size:15.5px;max-width:58ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{position:relative;margin-top:var(--sp);padding:72px 0 30px;border-top:1px solid var(--line);background:var(--bg-2);overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background:radial-gradient(rgba(237,235,255,.05) 1px,transparent 1px);background-size:24px 24px;opacity:.7;pointer-events:none}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;position:relative;z-index:1}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-brand .brand-name{font-size:16px;font-weight:700}
.footer-desc{color:var(--text-2);font-size:14px;max-width:38ch}
.tiny{font-size:13px;color:var(--text-3);margin-top:12px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:grid;gap:11px}
.footer-col a{color:var(--text-2);font-size:14px}
.footer-col a:hover{color:var(--primary-light)}
.footer-bottom{
  position:relative;z-index:1;margin-top:52px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 24px;text-align:center;
  font-size:13px;color:var(--text-3);
}
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(10px);color:var(--text-2);
  display:grid;place-items:center;font-size:16px;opacity:0;pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease),border-color .2s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{border-color:var(--line-active);color:var(--accent);transform:translateY(-3px)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav-links a{padding:9px 10px;font-size:13.5px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .layout{grid-template-columns:1fr}
  .rail{position:static}
  .steps{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav-shell.is-open .nav-links{
    display:flex;position:fixed;inset:0;flex-direction:column;justify-content:center;align-items:stretch;
    gap:6px;padding:96px 28px 48px;margin:0;background:rgba(8,7,15,.94);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);z-index:75;
  }
  .nav-shell.is-open .nav-links a{font-size:18px;padding:15px 18px;border-radius:14px;color:var(--text)}
  .nav-shell.is-open .nav-links a.is-active{background:rgba(124,92,255,.16)}
  .nav-shell.is-open .nav-links a.is-active::after{display:none}
  .nav-shell.is-open .nav-cta{display:none}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .cat-hero{padding:126px 0 56px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .metrics{grid-template-columns:1fr}
  .metric{border-right:0;border-bottom:1px solid var(--line);padding:20px}
  .metric:last-child{border-bottom:0}
  .card{padding:20px}
  .card-row{grid-template-columns:1fr;gap:18px}
  .card-media{order:-1}
  .steps{grid-template-columns:1fr}
  .bar-row{grid-template-columns:1fr;gap:8px}
  .bar-val{text-align:left}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
  .orbit{display:none}
}
@media (max-width:420px){
  .brand-sub{display:none}
  .faq-q{padding:16px;font-size:15px}
  .kv-row{flex-direction:column;gap:4px;align-items:flex-start}
  .kv-val{text-align:left}
}

/* roulang page: category1 */
:root{
  --bg:#08070F;
  --bg-2:#100E1C;
  --panel:#15122A;
  --panel-2:#1D1934;
  --float:rgba(16,14,28,.72);
  --primary:#7C5CFF;
  --primary-deep:#5B3BE0;
  --primary-light:#A78BFF;
  --accent:#2BE8C8;
  --heat:#FF4D9D;
  --text:#EDEBFF;
  --text-2:#A8A3C4;
  --text-3:#6F6A8C;
  --line:rgba(150,130,255,.14);
  --line-accent:rgba(43,232,200,.45);
  --ok:#34D399;
  --warn:#FBBF24;
  --err:#F87171;
  --invert-bg:#F4F2FF;
  --invert-text:#15122A;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-1:0 16px 40px rgba(8,5,20,.55);
  --shadow-2:0 16px 40px rgba(8,5,20,.55),0 0 0 1px rgba(124,92,255,.25);
  --shadow-glow:0 24px 70px rgba(124,92,255,.22);
  --gap:24px;
  --ease:200ms cubic-bezier(.22,.61,.36,1);
  --font-cn:"MiSans","HarmonyOS Sans SC","Alibaba PuHuiTi","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-lg);object-fit:cover;background:var(--panel);}
a{color:var(--primary-light);text-decoration:none;transition:color var(--ease),text-underline-offset var(--ease);}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.4px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--line-accent);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.mono{font-family:var(--font-mono);letter-spacing:-.3px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  padding:20px 0;
  transition:padding var(--ease),background var(--ease);
}
.site-header.is-scrolled{padding:10px 0;}
.nav-shell{
  display:flex;align-items:center;gap:20px;
  padding:10px 12px 10px 18px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:var(--float);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:0 10px 30px rgba(8,5,20,.45);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled .nav-shell{box-shadow:0 16px 44px rgba(8,5,20,.68);background:rgba(12,10,22,.88);}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;flex:0 0 auto;}
.brand:hover{text-decoration:none;color:var(--text);}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;
  display:grid;place-items:center;
  border-radius:14px;
  font-size:14px;font-weight:800;letter-spacing:.5px;
  color:#0A0918;
  background:linear-gradient(135deg,var(--accent),var(--primary));
}
.brand-name{display:block;font-size:15px;font-weight:800;letter-spacing:-.2px;}
.brand-sub{display:block;font-size:11px;color:var(--text-3);letter-spacing:.5px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:nowrap;}
.nav-links a{
  position:relative;
  padding:9px 12px;border-radius:var(--radius-pill);
  font-size:14px;color:var(--text-2);white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(124,92,255,.12);text-decoration:none;}
.nav-links a.is-active{color:var(--text);background:rgba(43,232,200,.10);}
.nav-links a.is-active::after{
  content:"";position:absolute;left:50%;bottom:3px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--accent);
}
.nav-cta{flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:var(--radius-pill);
  font-size:14px;font-weight:700;letter-spacing:.2px;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn-primary{
  color:#0A0918;
  background:linear-gradient(120deg,var(--accent),var(--primary));
  box-shadow:0 12px 30px rgba(124,92,255,.32);
}
.btn-primary:hover{color:#0A0918;box-shadow:0 16px 40px rgba(43,232,200,.34);}
.btn-ghost{
  color:var(--text);border-color:var(--line);
  background:rgba(124,92,255,.08);
}
.btn-ghost:hover{color:var(--text);border-color:var(--line-accent);background:rgba(43,232,200,.10);}
.btn-light{
  color:var(--invert-text);background:var(--invert-bg);
}
.btn-light:hover{color:var(--invert-text);box-shadow:0 14px 34px rgba(244,242,255,.24);}
.nav-toggle{
  display:none;width:44px;height:44px;flex:0 0 44px;
  border-radius:50%;border:1px solid var(--line);background:rgba(124,92,255,.10);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--text);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;left:50%;}
.nav-toggle span::after{top:6px;left:50%;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  padding:172px 0 84px;
  overflow:hidden;
  background:
    radial-gradient(circle at 18% 22%, rgba(124,92,255,.28), transparent 55%),
    radial-gradient(circle at 82% 8%, rgba(43,232,200,.16), transparent 50%),
    var(--bg);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.28;
  filter:saturate(1.1);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(8,7,15,.72),rgba(8,7,15,.92) 68%,var(--bg) 100%),
    radial-gradient(circle at 70% 40%, rgba(124,92,255,.18), transparent 60%);
}
.cat-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--accent);}
.cat-hero h1{
  font-size:clamp(34px,4.6vw,54px);
  font-weight:800;line-height:1.15;letter-spacing:-.5px;
  max-width:880px;
}
.cat-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--accent),var(--primary-light));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  margin-top:20px;max-width:720px;
  font-size:17px;color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:rgba(21,18,42,.72);
  font-size:12px;letter-spacing:.5px;color:var(--text-2);
}
.chip b{color:var(--accent);font-family:var(--font-mono);font-weight:700;}
.hero-facts{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;margin-top:44px;max-width:820px;
}
.fact{
  padding:18px 20px;border-radius:var(--radius-md);
  border:1px solid var(--line);background:rgba(15,13,28,.78);
}
.fact strong{display:block;font-family:var(--font-mono);font-size:24px;color:var(--text);}
.fact span{font-size:13px;color:var(--text-3);}

/* ---------- 通用板块头 ---------- */
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-head .kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:1.4px;color:var(--accent);text-transform:uppercase;
  margin-bottom:16px;
}
.sec-head .kicker::before{
  content:"";width:26px;height:2px;border-radius:2px;background:var(--accent);
}
.sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;}
.sec-head p{margin-top:16px;color:var(--text-2);}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-head--center .kicker{justify-content:center;}

/* ---------- 说明区 ---------- */
.intro-band{
  padding:72px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:var(--bg-2);
}
.intro-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:48px;align-items:start;}
.intro-text p{color:var(--text-2);margin-bottom:16px;}
.intro-text p strong{color:var(--text);}
.intro-side{
  padding:26px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:var(--panel);
  box-shadow:var(--shadow-1);
}
.intro-side h3{font-size:18px;margin-bottom:16px;}
.kv-list li{
  display:flex;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px dashed rgba(150,130,255,.22);
  font-size:14px;color:var(--text-2);
}
.kv-list li:last-child{border-bottom:none;}
.kv-list li b{color:var(--text);font-family:var(--font-mono);font-weight:600;}

/* ---------- 宽幅图文交替行 ---------- */
.rows{border-top:1px solid var(--line);}
.row-item{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.row-item.reverse .row-media{order:-1;}
.row-index{
  font-family:var(--font-mono);font-size:14px;letter-spacing:1px;
  color:var(--accent);margin-bottom:14px;display:block;
}
.row-copy h3{font-size:22px;font-weight:700;margin-bottom:14px;}
.row-copy p{color:var(--text-2);margin-bottom:18px;}
.check-list li{
  position:relative;padding-left:26px;margin-bottom:10px;
  font-size:15px;color:var(--text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:9px;height:9px;border-radius:3px;
  background:linear-gradient(135deg,var(--accent),var(--primary));
}
.check-list li b{color:var(--text);font-weight:600;}
.row-media{position:relative;}
.row-media img{
  width:100%;aspect-ratio:16/10;border:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.row-media .media-tag{
  position:absolute;left:16px;bottom:16px;
  padding:6px 12px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.5px;color:var(--text);
  background:rgba(8,7,15,.78);border:1px solid var(--line);
}

/* ---------- 授权档位对比 ---------- */
.tier-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.tier{
  padding:28px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:var(--panel);
  box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.tier:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-accent);}
.tier .tier-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
.tier h3{font-size:19px;}
.badge{
  padding:5px 11px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.5px;border:1px solid var(--line);
  color:var(--text-2);background:rgba(124,92,255,.10);
}
.badge--accent{color:var(--accent);border-color:var(--line-accent);background:rgba(43,232,200,.10);}
.badge--heat{color:var(--heat);border-color:rgba(255,77,157,.4);background:rgba(255,77,157,.10);}
.tier p{color:var(--text-2);font-size:15px;margin-bottom:18px;}
.tier .kv-list li{font-size:14px;}
.note-line{
  margin-top:24px;padding:16px 20px;border-radius:var(--radius-md);
  border:1px solid var(--line);background:var(--bg-2);
  font-size:14px;color:var(--text-2);
}
.note-line b{color:var(--accent);}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;gap:18px;}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:24px;align-items:start;
  padding:24px 26px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:var(--panel);
  transition:border-color var(--ease),transform var(--ease);
}
.step:hover{border-color:var(--line-accent);transform:translateX(4px);}
.step-no{
  width:64px;height:64px;border-radius:18px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:20px;font-weight:700;color:#0A0918;
  background:linear-gradient(135deg,var(--primary-light),var(--accent));
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{color:var(--text-2);font-size:15px;}
.step code{
  display:inline-block;margin-top:10px;padding:6px 12px;
  border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:13px;
  color:var(--accent);background:rgba(8,7,15,.85);border:1px solid var(--line);
  overflow-x:auto;max-width:100%;
}

/* ---------- 异常对照 ---------- */
.fault-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.fault{
  padding:24px;border-radius:var(--radius-lg);
  border:1px solid var(--line);background:var(--bg-2);
  transition:transform var(--ease),border-color var(--ease);
}
.fault:hover{transform:translateY(-4px);border-color:var(--line-accent);}
.fault .fault-code{
  display:inline-block;margin-bottom:12px;padding:5px 11px;border-radius:var(--radius-sm);
  font-family:var(--font-mono);font-size:13px;color:var(--warn);
  background:rgba(251,191,36,.10);border:1px solid rgba(251,191,36,.3);
}
.fault h3{font-size:17px;margin-bottom:10px;}
.fault p{font-size:14px;color:var(--text-2);}
.fault .fix{margin-top:14px;font-size:14px;color:var(--text);}
.fault .fix span{color:var(--accent);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--panel);overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item.is-open{border-color:var(--line-accent);background:var(--panel-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;background:none;border:none;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.5;
}
.faq-icon{
  flex:0 0 30px;width:30px;height:30px;border-radius:50%;
  display:grid;place-items:center;position:relative;
  border:1px solid var(--line);transition:transform var(--ease),background var(--ease),border-color var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:rgba(43,232,200,.12);border-color:var(--line-accent);}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 320ms cubic-bezier(.22,.61,.36,1);
}
.faq-a p{padding:0 24px 22px;color:var(--text-2);font-size:15px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:28px;
  padding:56px 48px;
  background:linear-gradient(120deg,rgba(91,59,224,.92),rgba(124,92,255,.86) 45%,rgba(43,232,200,.72));
  box-shadow:var(--shadow-glow);
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.06) 0 1px,transparent 1px 14px);
  opacity:.5;pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;}
.cta-band h2{font-size:clamp(24px,3vw,32px);color:#0A0918;}
.cta-band p{margin-top:14px;color:rgba(10,9,24,.78);font-size:16px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.cta-actions .btn-dark{
  color:var(--text);background:rgba(10,9,24,.86);border-color:rgba(10,9,24,.4);
}
.cta-actions .btn-dark:hover{color:var(--text);box-shadow:0 16px 36px rgba(10,9,24,.4);}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  padding:72px 0 28px;
  background:var(--bg-2);
  border-top:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(237,235,255,.07) 1px,transparent 1px);
  background-size:26px 26px;opacity:.5;pointer-events:none;
}
.site-footer .container{position:relative;z-index:2;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-desc{color:var(--text-2);font-size:14px;max-width:340px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--primary-light);}
.tiny{font-size:13px;color:var(--text-3);margin-top:14px;}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:80;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(16,14,28,.86);
  color:var(--text);font-size:16px;backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),border-color var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:var(--line-accent);color:var(--accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links a{padding:9px 9px;font-size:13px;}
  .nav-shell{gap:12px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .section--tight{padding:52px 0;}
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:block;margin-left:auto;}
  .site-header.menu-open .nav-links{
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    position:fixed;top:84px;left:18px;right:18px;
    padding:18px;border-radius:24px;
    background:rgba(12,10,22,.96);
    border:1px solid var(--line);
    box-shadow:0 24px 60px rgba(8,5,20,.7);
    backdrop-filter:blur(18px);
    max-height:calc(100vh - 120px);overflow-y:auto;
  }
  .site-header.menu-open .nav-links a{padding:14px 16px;font-size:15px;}
  .site-header.menu-open .nav-cta{display:flex;margin:14px 18px 0;}
  .cat-hero{padding:150px 0 68px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .tier-grid{grid-template-columns:1fr;}
  .fault-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .hero-facts{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .section--tight{padding:44px 0;}
  .cat-hero{padding:132px 0 56px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .btn{width:100%;}
  .nav-cta{display:none;}
  .hero-facts{grid-template-columns:1fr 1fr;}
  .row-item{grid-template-columns:1fr;gap:26px;padding:40px 0;}
  .row-item.reverse .row-media{order:0;}
  .fault-grid{grid-template-columns:1fr;}
  .step{grid-template-columns:1fr;gap:16px;padding:22px;}
  .cta-band{padding:36px 24px;border-radius:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:420px){
  .hero-facts{grid-template-columns:1fr;}
  .chip{font-size:11px;}
  .cat-hero h1{font-size:30px;}
}