/* roulang page: index */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1222;
  --bg-2:#0F1B31;
  --primary:#2F6BFF;
  --accent:#35E0C8;
  --signal:#FF7A1A;
  --text:#E8EEF9;
  --text-2:#9FB0C9;
  --muted:#6B7C99;
  --line:rgba(120,160,255,.14);
  --line-strong:rgba(120,160,255,.3);
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(120,160,255,.16);
  --r-card:18px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -18px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(53,224,200,.45),0 10px 30px -8px rgba(47,107,255,.55);
  --shadow-glow-hover:0 0 0 1px rgba(53,224,200,.6),0 14px 38px -8px rgba(47,107,255,.7);
  --container:1200px;
  --mono:ui-monospace,"Roboto Mono","DIN Alternate",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg-0);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 10% -6%,rgba(47,107,255,.12),transparent 70%),
    radial-gradient(540px 400px at 94% 6%,rgba(53,224,200,.10),transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(115deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:24px 24px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;
}
::selection{background:rgba(53,224,200,.28);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:clamp(56px,8vw,104px) 0;position:relative;z-index:1;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;
  color:var(--accent);text-transform:uppercase;padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(53,224,200,.08);border:1px solid rgba(53,224,200,.26);line-height:1.4;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.16;font-weight:800;letter-spacing:-.01em;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.24;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
.sec-head{max-width:720px;margin-bottom:clamp(28px,4vw,48px);}
.sec-head h2{margin:16px 0 12px;}
.sec-head p{color:var(--text-2);font-size:15px;}

/* ------- 悬浮胶囊导航 ------- */
.site-header{
  position:sticky;top:16px;z-index:80;display:flex;justify-content:center;padding:0 16px;
}
.nav-pill{
  width:min(1160px,100%);display:flex;align-items:center;gap:16px;
  padding:10px 12px 10px 20px;border-radius:var(--r-pill);
  background:rgba(10,18,34,.74);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--glass-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 20px 46px -24px rgba(0,0,0,.95);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:6px 8px;border-radius:var(--r-pill);transition:background .24s ease;}
.brand:hover{background:rgba(255,255,255,.05);}
.brand-dot{
  width:30px;height:30px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--primary),var(--accent));
  box-shadow:0 6px 18px -6px rgba(47,107,255,.9);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#04121F;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;letter-spacing:.02em;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:4px;margin:0 auto;}
.nav-link{
  position:relative;padding:9px 16px;border-radius:var(--r-pill);font-size:15px;color:var(--text-2);
  transition:color .24s ease,background .24s ease,transform .24s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:center;transition:transform .24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--text);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-pill);background:rgba(255,255,255,.05);
  border:1px solid var(--glass-line);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;transition:.24s ease;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.24s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ------- 抽屉 ------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,6,12,.66);opacity:0;pointer-events:none;
  transition:opacity .24s ease;z-index:90;
}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(330px,88vw);z-index:95;
  background:rgba(10,18,34,.96);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-left:1px solid var(--glass-line);
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,.1,.2,1);
  padding:22px 20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
body.drawer-open .drawer{transform:none;}
body.drawer-open .drawer-mask{opacity:1;pointer-events:auto;}
.drawer-close{
  align-self:flex-end;width:44px;height:44px;border-radius:var(--r-pill);background:rgba(255,255,255,.05);
  border:1px solid var(--glass-line);cursor:pointer;font-size:18px;line-height:1;
}
.drawer-links{display:flex;flex-direction:column;gap:6px;}
.drawer-links a{
  padding:14px 16px;border-radius:var(--r-sm);font-size:16px;color:var(--text-2);
  border:1px solid transparent;min-height:44px;display:flex;align-items:center;
  transition:background .24s ease,color .24s ease,border-color .24s ease;
}
.drawer-links a:hover,.drawer-links a.active{background:rgba(255,255,255,.05);color:var(--text);border-color:var(--glass-line);}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);line-height:1.9;}

/* ------- 按钮 ------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);border:0;cursor:pointer;
  font-size:15px;font-weight:700;color:#04121F;
  background:linear-gradient(120deg,var(--primary),var(--accent));
  box-shadow:var(--shadow-glow);transition:box-shadow .24s ease,transform .24s ease,filter .24s ease;
  min-height:44px;
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px) scale(1.02);box-shadow:var(--shadow-glow-hover);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);cursor:pointer;
  font-size:15px;font-weight:600;color:var(--text);background:transparent;
  border:1px solid rgba(120,160,255,.35);
  transition:border-color .24s ease,color .24s ease,background .24s ease,transform .24s ease;
  min-height:44px;
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(53,224,200,.06);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:15px;font-weight:600;}
.btn-link span{transition:transform .24s ease;}
.btn-link:hover span{transform:translateX(4px);}

/* ------- 首屏 ------- */
.hero{
  position:relative;margin-top:-72px;padding:calc(72px + clamp(56px,8vw,96px)) 0 clamp(48px,6vw,80px);
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(180deg,rgba(5,8,15,.72) 0%,rgba(5,8,15,.86) 55%,var(--bg-0) 100%),
    linear-gradient(90deg,rgba(5,8,15,.92) 0%,rgba(5,8,15,.55) 52%,rgba(5,8,15,.88) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.hero-inner{
  display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(28px,4vw,56px);align-items:center;
}
.hero-copy{max-width:640px;}
.hero-title{margin:18px 0 16px;}
.hero-title .hl{
  background:linear-gradient(120deg,var(--primary),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{color:var(--text-2);font-size:clamp(15px,1.4vw,18px);line-height:1.7;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 30px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;}
.stat-chip{
  display:flex;flex-direction:column;gap:2px;padding:10px 16px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.045);border:1px solid var(--glass-line);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.stat-chip b{font-family:var(--mono);font-size:17px;color:var(--accent);letter-spacing:.02em;}
.stat-chip span{font-size:12px;color:var(--muted);}
.hero-visual{position:relative;}
.device-card{
  position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--glass-line);
  box-shadow:0 0 0 1px rgba(53,224,200,.14),0 30px 70px -30px rgba(47,107,255,.75);
  background:rgba(15,27,49,.86);
}
.device-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.device-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(5,8,15,.06) 0%,rgba(5,8,15,.62) 100%);
}
.device-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;display:flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--r-pill);font-size:13px;color:var(--text);
  background:rgba(5,8,15,.66);border:1px solid var(--glass-line);
}
.device-tag i{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);font-style:normal;}

/* ------- 痛点区 ------- */
.pain-wrap{display:grid;grid-template-columns:minmax(260px,340px) 1fr;gap:clamp(28px,4vw,64px);align-items:start;}
.pain-head{position:sticky;top:110px;}
.pain-head h2{margin:16px 0 12px;}
.pain-head p{color:var(--text-2);font-size:15px;}
.pain-list{display:flex;flex-direction:column;gap:14px;}
.pain-list li{
  display:grid;grid-template-columns:76px 1fr;gap:20px;align-items:start;
  padding:22px 24px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--glass-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .24s ease,transform .24s ease,background .24s ease;
}
.pain-list li:hover{border-color:rgba(53,224,200,.4);transform:translateY(-2px);}
.pain-list .num{
  font-family:var(--mono);font-size:30px;line-height:1;font-weight:700;color:var(--text);
  padding-left:16px;border-left:3px solid var(--accent);min-width:0;
}
.pain-list h3{margin-bottom:6px;}
.pain-list p{color:var(--text-2);font-size:14px;line-height:1.7;}

/* ------- 解决方案 ------- */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;
  padding:clamp(20px,3vw,32px) 0;
}
.feature-row.reverse .feature-media{order:2;}
.feature-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--glass-line);box-shadow:0 0 0 1px rgba(53,224,200,.1),var(--shadow-card);}
.feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(140deg,rgba(5,8,15,.1),rgba(5,8,15,.6));}
.feature-text h3{margin-bottom:12px;}
.feature-text p{color:var(--text-2);font-size:15px;max-width:520px;}
.tick-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);}
.tick-list li::before{
  content:"";flex:0 0 auto;width:14px;height:14px;margin-top:6px;border-radius:50%;
  background:rgba(53,224,200,.16);border:1px solid rgba(53,224,200,.55);
}

/* ------- 数据面板 ------- */
.panel-glass{
  padding:clamp(26px,4vw,46px);border-radius:24px;
  background:rgba(255,255,255,.045);border:1px solid var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,3vw,36px);}
.metric{display:flex;flex-direction:column;gap:8px;}
.metric-value{font-family:var(--mono);font-size:clamp(28px,3.6vw,42px);font-weight:700;line-height:1;color:var(--text);letter-spacing:-.01em;}
.metric-value small{font-size:16px;color:var(--accent);margin-left:4px;font-weight:600;}
.metric-name{font-size:14px;color:var(--text-2);}
.metric-bar{height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent));}
.metric-note{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);}

/* ------- 证言 ------- */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start;}
.voice-card{
  padding:24px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--glass-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  transition:border-color .24s ease,transform .24s ease;
}
.voice-card:hover{border-color:rgba(53,224,200,.4);transform:translateY(-4px);}
.voice-card.raised{margin-top:-24px;}
.voice-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{width:46px;height:46px;border-radius:50%;overflow:hidden;flex:0 0 auto;border:1px solid var(--glass-line);}
.avatar img{width:100%;height:100%;object-fit:cover;}
.voice-name{font-size:15px;font-weight:600;}
.voice-role{font-size:12px;color:var(--muted);}
.voice-text{color:var(--text-2);font-size:14px;line-height:1.75;}
.stars{display:flex;gap:3px;margin-top:14px;}
.stars svg{width:16px;height:16px;stroke:var(--signal);fill:none;stroke-width:1.6;}

/* ------- CTA 面板 ------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;padding:clamp(28px,4vw,52px);
  border:1px solid var(--glass-line);
  background-image:linear-gradient(100deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.72) 62%,rgba(5,8,15,.9) 100%),
    url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow-card);
}
.cta-copy{max-width:600px;}
.cta-copy h2{margin-bottom:10px;}
.cta-copy p{color:var(--text-2);font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* ------- 最新信息 ------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:clamp(24px,3vw,38px);}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--glass-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  transition:transform .24s ease,border-color .24s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(53,224,200,.4);}
.post-card:hover h3{color:var(--accent);}
.post-thumb{position:relative;}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.post-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.55));}
.post-thumb .badge{position:absolute;left:14px;top:14px;z-index:2;}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.02em;color:var(--text);
  background:rgba(5,8,15,.7);border:1px solid var(--glass-line);
}
.badge.signal{color:#20130A;background:var(--signal);border-color:transparent;font-weight:700;}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .24s ease;}
.post-body p{font-size:14px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);}
.post-meta .date{font-family:var(--mono);letter-spacing:.02em;}
.post-meta .arrow{color:var(--accent);transition:transform .24s ease;}
.post-card:hover .post-meta .arrow{transform:translateX(4px);}
.empty-state{
  text-align:center;padding:48px 24px;border-radius:var(--r-card);
  background:var(--glass);border:1px dashed var(--glass-line);
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:34px;height:34px;stroke:var(--muted);fill:none;stroke-width:1.6;}
.empty-state p{color:var(--text-2);font-size:15px;}
.load-more{display:flex;justify-content:center;margin-top:30px;}

/* ------- FAQ ------- */
.faq-wrap{display:grid;grid-template-columns:minmax(240px,340px) 1fr;gap:clamp(26px,4vw,60px);align-items:start;}
.faq-head{position:sticky;top:110px;}
.faq-head h2{margin:16px 0 12px;}
.faq-head p{color:var(--text-2);font-size:15px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border-radius:var(--r-card);background:var(--glass);border:1px solid var(--glass-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .24s ease;
}
.faq-item[open]{border-color:rgba(53,224,200,.4);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .24s ease;
}
.faq-item summary .plus::before,.faq-item summary .plus::after{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--accent);border-radius:2px;
}
.faq-item summary .plus::before{width:14px;height:2px;}
.faq-item summary .plus::after{width:2px;height:14px;}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-body{padding:0 22px 20px;border-top:1px solid var(--line);margin-top:2px;}
.faq-body p{color:var(--text-2);font-size:14px;line-height:1.85;padding-top:16px;}

/* ------- 表单 ------- */
.sub-form{display:flex;flex-direction:column;gap:10px;margin-top:14px;}
.sub-form label{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.sub-form input{
  width:100%;padding:12px 14px;border-radius:var(--r-sm);background:rgba(255,255,255,.045);
  border:1px solid var(--glass-line);font-size:14px;transition:border-color .24s ease,box-shadow .24s ease;
  min-height:44px;
}
.sub-form input::placeholder{color:var(--muted);}
.sub-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(53,224,200,.16);}
.sub-form .hint{font-size:12px;color:var(--muted);}

/* ------- 页脚 ------- */
.site-footer{
  position:relative;z-index:1;margin-top:clamp(40px,6vw,72px);
  padding-top:clamp(36px,5vw,56px);border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,18,34,.4),rgba(5,8,15,.9));
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:clamp(20px,3vw,40px);}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--text);margin-bottom:16px;}
.footer-col p{font-size:13px;color:var(--muted);line-height:1.9;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .24s ease,transform .24s ease;display:inline-block;}
.footer-links a:hover{color:var(--accent);transform:translateX(2px);}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-bottom{
  margin-top:clamp(28px,4vw,44px);padding:18px 0 26px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12px;color:var(--muted);
}
.footer-bottom .mono{font-family:var(--mono);}

@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-copy{max-width:none;}
  .pain-wrap,.faq-wrap{grid-template-columns:1fr;}
  .pain-head,.faq-head{position:static;}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .voice-grid{grid-template-columns:repeat(3,minmax(260px,1fr));overflow-x:auto;padding-bottom:8px;}
  .voice-card.raised{margin-top:0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .nav-links,.nav-actions .btn-primary{display:none;}
  .nav-toggle{display:flex;}
  .nav-pill{padding:8px 10px 8px 14px;}
  .brand-text em{display:none;}
  .feature-row{grid-template-columns:1fr;}
  .feature-row.reverse .feature-media{order:0;}
  .cta-panel{flex-direction:column;align-items:flex-start;}
  .post-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr 1fr;}
  .voice-grid{grid-template-columns:repeat(3,minmax(240px,1fr));}
  .footer-grid{grid-template-columns:1fr;}
  .hero{margin-top:-64px;}
  .pain-list li{grid-template-columns:1fr;gap:10px;padding:20px;}
  .pain-list .num{font-size:24px;border-left-width:2px;}
}
@media (max-width:520px){
  body{font-size:15px;}
  .metric-grid{grid-template-columns:1fr;}
  .btn-primary,.btn-ghost{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .stat-chip{flex:1 1 calc(50% - 10px);}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important;}
  .post-card:hover,.voice-card:hover,.pain-list li:hover,.btn-primary:hover,.btn-ghost:hover{transform:none;}
}

/* roulang page: article */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1222;
  --bg-2:#0F1B31;
  --primary:#2F6BFF;
  --accent:#35E0C8;
  --signal:#FF7A1A;
  --text:#E8EEF9;
  --text-2:#9FB0C9;
  --muted:#6B7C99;
  --line:rgba(120,160,255,.14);
  --line-strong:rgba(120,160,255,.32);
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(15,27,49,.86);
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --pill:999px;
  --shadow-card:0 18px 40px -18px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(53,224,200,.45),0 10px 30px -8px rgba(47,107,255,.55);
  --font-sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"Roboto Mono","DIN Alternate",Menlo,Consolas,monospace;
  --container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg-0);
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(760px 520px at 10% -8%,rgba(47,107,255,.12),transparent 70%),
    radial-gradient(640px 460px at 92% 6%,rgba(53,224,200,.10),transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.028) 0 1px,transparent 1px 20px);
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color .24s ease}
a:hover{color:var(--accent)}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:16px 16px 0;
  display:flex;justify-content:center;
}
.nav-pill{
  width:min(1160px,100%);
  display:flex;align-items:center;gap:18px;
  padding:10px 14px 10px 16px;
  border-radius:var(--pill);
  background:rgba(10,18,34,.72);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(120,160,255,.16);
  box-shadow:0 18px 40px -18px rgba(0,0,0,.8),inset 0 1px 0 rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-dot{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.5px;
  color:#05080F;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 0 1px rgba(53,224,200,.35),0 8px 22px -10px rgba(47,107,255,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.4px}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:2px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:var(--pill);
  font-size:14.5px;color:var(--text-2);white-space:nowrap;
  transition:color .24s ease,background .24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(120,160,255,.09)}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%) scaleX(.3);
  width:22px;height:2px;border-radius:2px;background:var(--accent);opacity:0;transition:all .24s ease;
}
.nav-link.active{color:var(--text);background:rgba(120,160,255,.10)}
.nav-link.active::after{opacity:1;transform:translateX(-50%) scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--pill);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:1.6px;background:var(--text);border-radius:2px;transition:.24s ease;
}
.nav-toggle span{top:50%;margin-top:-.8px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* buttons */
.btn-primary,.btn-secondary,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .24s ease,box-shadow .24s ease,color .24s ease,border-color .24s ease,background .24s ease;
}
.btn-primary{
  color:#04121A;
  background:linear-gradient(120deg,var(--primary),var(--accent));
  box-shadow:var(--shadow-glow);
  border:1px solid transparent;
}
.btn-primary:hover{color:#04121A;transform:translateY(-1px) scale(1.02);box-shadow:0 0 0 1px rgba(53,224,200,.6),0 14px 36px -8px rgba(47,107,255,.7)}
.btn-primary:active{transform:translateY(1px) scale(1)}
.btn-secondary{
  color:var(--text);background:rgba(255,255,255,.03);
  border:1px solid var(--line-strong);
}
.btn-secondary:hover{border-color:var(--accent);color:var(--text);background:rgba(53,224,200,.07)}
.btn-ghost{color:var(--accent);padding:0 8px;min-height:40px}
.btn-ghost .arrow{transition:transform .24s ease}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-icon{
  width:42px;height:42px;border-radius:var(--pill);
  display:inline-grid;place-items:center;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--text-2);
  transition:.24s ease;
}
.btn-icon:hover{border-color:var(--accent);color:var(--accent);background:rgba(53,224,200,.08)}
.btn-icon svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.6}

/* drawer */
.nav-drawer{
  position:fixed;top:0;right:0;z-index:80;
  width:min(340px,86vw);height:100%;
  padding:22px 20px;
  background:var(--glass-strong);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-left:1px solid var(--line);
  transform:translateX(105%);
  transition:transform .3s ease;
  overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-links{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 16px;border-radius:var(--r-sm);
  color:var(--text);background:rgba(255,255,255,.035);border:1px solid var(--line);
  font-size:15.5px;
}
.drawer-links a:hover,.drawer-links a.active{border-color:var(--accent);color:var(--accent)}
.drawer-cta{display:flex;flex-direction:column;gap:10px;margin-bottom:22px}
.drawer-contact{font-size:13px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);padding-top:14px}
.drawer-mask{
  position:fixed;inset:0;z-index:70;background:rgba(5,8,15,.7);
  opacity:0;visibility:hidden;transition:.3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- article hero ---------- */
main{position:relative;z-index:1}
.article-hero{
  position:relative;
  margin-top:22px;
  padding:clamp(38px,6vw,72px) 0 clamp(30px,4vw,52px);
  background-image:linear-gradient(180deg,rgba(5,8,15,.78),rgba(5,8,15,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:18px;
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb span.sep{color:rgba(120,160,255,.4)}
.breadcrumb .current{color:var(--text-2);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{display:flex;gap:28px;align-items:flex-start;justify-content:space-between}
.article-head-main{max-width:820px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--pill);
  font-size:12px;letter-spacing:.5px;
  color:var(--accent);background:rgba(53,224,200,.10);
  border:1px solid rgba(53,224,200,.32);
}
.badge.signal{color:var(--signal);background:rgba(255,122,26,.10);border-color:rgba(255,122,26,.32)}
h1{
  margin:18px 0 0;
  font-size:clamp(30px,4.4vw,52px);
  font-weight:800;line-height:1.16;
  letter-spacing:.4px;
}
.meta-bar{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px 18px;
  margin-top:22px;font-size:13px;color:var(--muted);
}
.meta-bar .meta-strong{color:var(--text-2)}
.meta-sep{width:1px;height:14px;background:var(--line-strong)}
.share-actions{display:flex;gap:10px;flex:0 0 auto;padding-top:6px}

/* ---------- layout ---------- */
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:clamp(24px,4vw,44px);
  align-items:start;
  padding:clamp(38px,5vw,64px) 0 clamp(48px,6vw,80px);
}
.card-glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(120,160,255,.16);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}

/* ---------- article body ---------- */
.article-body{
  padding:clamp(22px,3.2vw,42px);
  max-width:820px;
  font-size:16px;line-height:1.85;color:var(--text-2);
  word-wrap:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 20px;color:var(--text-2)}
.article-body h2{
  position:relative;
  margin:44px 0 18px;padding-left:16px;
  font-size:clamp(21px,2.3vw,27px);font-weight:700;color:var(--text);line-height:1.35;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--primary));
}
.article-body h3{margin:30px 0 12px;font-size:19px;font-weight:600;color:var(--text)}
.article-body h4{margin:24px 0 10px;font-size:16px;font-weight:600;color:var(--text)}
.article-body strong{color:var(--text)}
.article-body a{color:var(--accent);border-bottom:1px solid rgba(53,224,200,.35)}
.article-body a:hover{border-bottom-color:var(--accent)}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:0}
.article-body ul li,.article-body ol li{
  position:relative;padding-left:24px;margin-bottom:10px;color:var(--text-2);
}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
}
.article-body ol{counter-reset:item}
.article-body ol li{counter-increment:item;padding-left:32px}
.article-body ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:.5px;
}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;
  background:var(--glass);border-left:3px solid var(--primary);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body code{
  font-family:var(--font-mono);font-size:.9em;
  background:rgba(255,255,255,.07);border:1px solid var(--line);
  padding:2px 6px;border-radius:6px;color:var(--accent);
}
.article-body pre{
  margin:24px 0;padding:16px 18px;overflow-x:auto;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  font-family:var(--font-mono);font-size:14px;line-height:1.7;color:var(--text-2);
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;font-size:14px}
.article-body img{
  width:100%;height:auto;margin:26px auto;border-radius:var(--r-md);
  border:1px solid var(--line);
}
.article-body figure{margin:26px 0}
.article-body figcaption{
  margin-top:-14px;text-align:center;font-size:13px;color:var(--muted);
}
.article-body table{
  width:100%;margin:26px 0;
  border-collapse:separate;border-spacing:0 6px;
  font-size:14.5px;
}
.article-body thead th{
  text-align:left;padding:10px 14px;font-size:13px;font-weight:600;
  color:var(--text-2);letter-spacing:.4px;
  border-bottom:1px solid var(--line-strong);
}
.article-body tbody tr{
  background:rgba(255,255,255,.035);
  transition:background .24s ease;
}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.06)}
.article-body tbody tr:hover{background:rgba(53,224,200,.08)}
.article-body td{padding:12px 14px;color:var(--text-2);border-top:1px solid var(--line)}
.article-body tbody tr td:first-child{border-radius:var(--r-sm) 0 0 var(--r-sm);border-left:1px solid var(--line)}
.article-body tbody tr td:last-child{border-radius:0 var(--r-sm) var(--r-sm) 0;border-right:1px solid var(--line)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* empty state */
.empty-state{
  padding:clamp(34px,6vw,64px) 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:46px;height:46px;stroke:var(--accent);fill:none;stroke-width:1.4}
.empty-state h2{font-size:20px;color:var(--text)}
.empty-state p{font-size:14.5px;color:var(--muted);max-width:46ch}

/* ---------- sidebar ---------- */
.side-col{display:flex;flex-direction:column;gap:20px;position:sticky;top:104px}
.side-card{padding:22px}
.side-card h3{font-size:15.5px;margin-bottom:14px;color:var(--text);display:flex;align-items:center;gap:8px}
.side-card h3::before{
  content:"";width:3px;height:16px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--primary));
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:8px 10px;border-left:2px solid var(--line);
  font-size:13.8px;color:var(--text-2);line-height:1.6;
  transition:.24s ease;
}
.toc-list a:hover{border-left-color:var(--accent);color:var(--text);background:rgba(255,255,255,.04)}
.hot-list{display:flex;flex-direction:column;gap:12px}
.hot-list a{display:block;padding-bottom:12px;border-bottom:1px solid var(--line)}
.hot-list a:last-child{border-bottom:0;padding-bottom:0}
.hot-list strong{display:block;font-size:14.5px;font-weight:600;color:var(--text-2);line-height:1.6}
.hot-list a:hover strong{color:var(--accent)}
.hot-list em{font-style:normal;font-size:12.5px;color:var(--muted);font-family:var(--font-mono)}
.side-cta{
  padding:22px;border-radius:var(--r-lg);
  background:linear-gradient(140deg,rgba(47,107,255,.18),rgba(53,224,200,.08));
  border:1px solid rgba(53,224,200,.28);
}
.side-cta p{font-size:13.6px;color:var(--text-2);margin:10px 0 16px}

/* ---------- related ---------- */
.section-block{margin-top:clamp(44px,6vw,72px)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:24px}
.section-head h2{font-size:clamp(21px,2.6vw,30px)}
.section-head p{margin-top:8px;font-size:14px;color:var(--muted);max-width:62ch}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(120,160,255,.16);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(53,224,200,.3);box-shadow:0 22px 46px -18px rgba(0,0,0,.85)}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.post-thumb img{width:100%;height:100%;transition:transform .4s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.05),rgba(5,8,15,.75));
}
.post-thumb .badge{position:absolute;left:12px;top:12px;z-index:2}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:16.5px;font-weight:600;line-height:1.5;color:var(--text)}
.post-body p{font-size:13.6px;line-height:1.7;color:var(--muted)}
.post-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:12px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted);
}
.post-foot .arrow{color:var(--accent)}

/* pager */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap);margin-top:var(--gap)}
.pager a{
  display:flex;flex-direction:column;gap:8px;
  padding:18px 20px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  transition:.24s ease;
}
.pager a:hover{border-color:rgba(53,224,200,.35);background:rgba(53,224,200,.05);color:inherit}
.pager em{font-style:normal;font-size:12.5px;color:var(--muted);font-family:var(--font-mono)}
.pager strong{font-size:15.5px;font-weight:600;color:var(--text)}
.pager .right{text-align:right;align-items:flex-end}

/* read tips */
.tips-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.tip-row{
  display:flex;gap:14px;padding:20px;border-radius:var(--r-lg);
  background:rgba(255,255,255,.035);border:1px solid var(--line);
  transition:.24s ease;
}
.tip-row:hover{border-color:rgba(53,224,200,.3);transform:translateY(-3px)}
.tip-num{
  flex:0 0 auto;font-family:var(--font-mono);font-size:20px;font-weight:700;
  color:var(--accent);letter-spacing:.5px;
}
.tip-row h3{font-size:15.5px;margin-bottom:6px;color:var(--text)}
.tip-row p{font-size:13.6px;line-height:1.75;color:var(--muted)}

/* cta band */
.cta-band{
  position:relative;overflow:hidden;
  margin:clamp(52px,7vw,88px) 0 0;
  padding:clamp(30px,4.6vw,54px);
  border-radius:var(--r-lg);
  background-image:linear-gradient(120deg,rgba(5,8,15,.9),rgba(15,27,49,.86)),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  border:1px solid rgba(53,224,200,.24);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.8vw,32px);max-width:22ch}
.cta-band p{margin-top:12px;font-size:14.6px;color:var(--text-2);max-width:56ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* footer */
.site-footer{
  margin-top:clamp(56px,8vw,104px);
  padding:clamp(40px,5vw,64px) 0 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,18,34,.55),rgba(5,8,15,.95));
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:clamp(24px,3vw,44px)}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--text);letter-spacing:.5px}
.footer-col p{font-size:13.4px;color:var(--muted);line-height:1.85;max-width:38ch}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:13.6px;color:var(--text-2);transition:.24s ease}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.sub-form{display:flex;flex-direction:column;gap:10px;margin-top:18px;max-width:340px}
.sub-form label{font-size:13px;color:var(--text-2)}
.sub-form input{
  width:100%;min-height:44px;padding:0 16px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.045);border:1px solid var(--line-strong);
  color:var(--text);font-size:14.5px;font-family:inherit;
  transition:.24s ease;
}
.sub-form input::placeholder{color:var(--muted)}
.sub-form input:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(53,224,200,.18);
}
.sub-form .hint{font-size:12.5px;color:var(--muted);line-height:1.7}
.footer-bottom{
  margin-top:clamp(30px,4vw,48px);padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .side-col{position:static;order:2}
  .article-body{max-width:none}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tips-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-links,.nav-actions .btn-primary{display:none}
  .nav-toggle{display:block}
  .site-header{padding:10px 12px 0}
  .nav-pill{padding:8px 10px 8px 12px}
  .brand-text em{display:none}
  .article-head{flex-direction:column;gap:18px}
  .share-actions{padding-top:0}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .pager{grid-template-columns:minmax(0,1fr)}
  .pager .right{text-align:left;align-items:flex-start}
  .cta-band{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-body{font-size:15.5px}
  .article-body{padding:22px 18px 28px}
}
@media (max-width:480px){
  h1{font-size:27px}
  .article-hero{padding-top:30px}
  .meta-bar{gap:8px 12px}
  .meta-sep{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .post-card:hover,.tip-row:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1222;
  --bg-2:#0F1B31;
  --primary:#2F6BFF;
  --accent:#35E0C8;
  --signal:#FF7A1A;
  --text-1:#E8EEF9;
  --text-2:#9FB0C9;
  --text-3:#6B7C99;
  --line:rgba(120,160,255,.14);
  --line-strong:rgba(120,160,255,.35);
  --glass:rgba(255,255,255,.045);
  --glass-border:rgba(120,160,255,.16);
  --radius-card:18px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-card:0 18px 40px -18px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(53,224,200,.45),0 10px 30px -8px rgba(47,107,255,.55);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"Roboto Mono","DIN Alternate",Menlo,Consolas,monospace;
  --sec-gap:clamp(56px,8vw,104px);
  --pad-x:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 460px at 12% -6%,rgba(47,107,255,.12),transparent 70%),
    radial-gradient(620px 460px at 92% 8%,rgba(53,224,200,.10),transparent 70%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.03;
  background-image:repeating-linear-gradient(115deg,rgba(120,160,255,.9) 0 1px,transparent 1px 9px);
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(53,224,200,.28);}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 var(--pad-x);
  position:relative;
  z-index:1;
}
.mono{font-family:var(--font-mono);letter-spacing:.02em;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:16px;
  z-index:60;
  padding:0 var(--pad-x);
}
.nav-pill{
  width:min(1160px,100%);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 18px;
  border-radius:var(--radius-pill);
  background:rgba(10,18,34,.72);
  border:1px solid var(--glass-border);
  box-shadow:0 18px 40px -22px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-dot{
  width:38px;height:38px;
  border-radius:12px;
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:14px;font-weight:700;
  color:#05080F;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 8px 22px -10px rgba(47,107,255,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:10px 16px;
  border-radius:var(--radius-pill);
  font-size:14px;
  color:var(--text-2);
  transition:color .24s ease,background .24s ease;
  min-height:44px;
  display:inline-flex;align-items:center;
}
.nav-link:hover{color:var(--text-1);background:rgba(120,160,255,.08);}
.nav-link.active{color:var(--text-1);background:rgba(47,107,255,.14);}
.nav-link.active::after{
  content:"";
  position:absolute;left:16px;right:16px;bottom:4px;height:2px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 12px rgba(53,224,200,.7);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;
  padding:11px 22px;
  border-radius:var(--radius-pill);
  font-size:14px;font-weight:700;
  color:#04101A;
  background:linear-gradient(118deg,var(--primary),var(--accent));
  box-shadow:var(--shadow-glow);
  transition:transform .24s ease,box-shadow .24s ease,filter .24s ease;
  white-space:nowrap;
}
.btn-primary:hover{filter:brightness(1.08);transform:scale(1.02);box-shadow:0 0 0 1px rgba(53,224,200,.55),0 14px 36px -8px rgba(47,107,255,.65);}
.btn-primary:active{transform:translateY(1px) scale(1);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:11px 22px;
  border-radius:var(--radius-pill);
  font-size:14px;font-weight:600;
  color:var(--text-1);
  border:1px solid var(--line-strong);
  background:transparent;
  transition:border-color .24s ease,color .24s ease,background .24s ease;
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(53,224,200,.06);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--accent);
  min-height:44px;
}
.btn-text svg{transition:transform .24s ease;}
.btn-text:hover svg{transform:translateX(4px);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text-1);border-radius:2px;
  transform:translateX(-50%);
  transition:transform .24s ease,opacity .24s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}

/* ============ 内页横幅 ============ */
.page-banner{
  position:relative;
  margin-top:26px;
  padding:clamp(56px,7vw,96px) 0 clamp(48px,6vw,80px);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-banner::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(5,8,15,.96) 8%,rgba(5,8,15,.78) 48%,rgba(5,8,15,.94) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center 32%;
  z-index:0;
}
.page-banner::after{
  content:"";
  position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,224,200,.45),transparent);
}
.banner-inner{position:relative;z-index:1;max-width:820px;}
.crumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
  margin-bottom:22px;
}
.crumb a{color:var(--text-2);transition:color .24s ease;}
.crumb a:hover{color:var(--accent);}
.crumb .sep{opacity:.5;}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  border-radius:var(--radius-pill);
  font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--accent);
  background:rgba(53,224,200,.08);
  border:1px solid rgba(53,224,200,.32);
}
.badge.signal{color:#FFD9BC;background:rgba(255,122,26,.10);border-color:rgba(255,122,26,.38);}
.banner-inner h1{
  margin:20px 0 18px;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.01em;
}
.banner-inner h1 span{
  display:block;
  font-size:clamp(20px,2.2vw,26px);
  font-weight:600;
  color:var(--text-2);
  margin-top:12px;
  line-height:1.45;
}
.banner-lead{font-size:16px;color:var(--text-2);max-width:660px;}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  padding:7px 14px;
  border-radius:var(--radius-sm);
  font-size:13px;
  color:var(--text-2);
  background:var(--glass);
  border:1px solid var(--glass-border);
}

/* ============ 通用板块 ============ */
.section{padding:var(--sec-gap) 0;}
.section-head{max-width:720px;margin-bottom:clamp(30px,4vw,52px);}
.section-head h2{
  font-size:clamp(24px,3vw,36px);
  line-height:1.24;font-weight:700;
  margin:14px 0 16px;
}
.section-head p{color:var(--text-2);font-size:16px;}

/* 图文交替 */
.media-row{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:clamp(24px,3vw,48px);
  align-items:center;
}
.media-row + .media-row{margin-top:clamp(40px,5vw,72px);}
.media-row.reverse .media-text{order:2;}
.media-row.reverse .media-figure{order:1;}
.media-figure{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--glass-border);
  box-shadow:0 0 0 1px rgba(47,107,255,.14),0 26px 60px -28px rgba(47,107,255,.6);
  aspect-ratio:16/9;
}
.media-figure img{width:100%;height:100%;object-fit:cover;}
.media-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.12),rgba(5,8,15,.72));
}
.media-figure figcaption{
  position:absolute;left:18px;right:18px;bottom:14px;
  z-index:2;font-size:13px;color:var(--text-2);
}
.media-text h3{font-size:20px;font-weight:600;margin:16px 0 12px;}
.media-text p{color:var(--text-2);margin-bottom:14px;}
.check-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:8px;
  font-size:14px;
  color:var(--text-2);
}
.check-list li::before{
  content:"";
  position:absolute;left:2px;top:11px;
  width:8px;height:8px;border-radius:3px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 10px rgba(53,224,200,.5);
}

/* 行卡片清单 */
.step-list{display:flex;flex-direction:column;gap:14px;}
.step-row{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(16px,2.4vw,28px);
  padding:22px 24px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:transform .24s ease,border-color .24s ease,background .24s ease;
}
.step-row:hover{
  transform:translateY(-4px);
  border-color:rgba(53,224,200,.34);
  background:rgba(47,107,255,.07);
}
.step-index{
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:700;
  color:transparent;
  background:linear-gradient(180deg,var(--accent),var(--primary));
  -webkit-background-clip:text;
  background-clip:text;
  min-width:52px;
  letter-spacing:.02em;
}
.step-body h3{font-size:18px;font-weight:600;margin-bottom:6px;}
.step-body p{font-size:14px;line-height:1.7;color:var(--text-2);}
.step-arrow{
  width:44px;height:44px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  display:grid;place-items:center;
  color:var(--text-2);
  transition:color .24s ease,border-color .24s ease,transform .24s ease;
}
.step-row:hover .step-arrow{color:var(--accent);border-color:var(--accent);transform:translateX(4px);}

/* 数据小条 */
.data-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-radius:var(--radius-card);
  background:rgba(15,27,49,.86);
  border:1px solid var(--glass-border);
  overflow:hidden;
}
.data-cell{
  padding:24px 22px;
  border-right:1px solid var(--line);
}
.data-cell:last-child{border-right:0;}
.data-cell b{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
  color:var(--text-1);
}
.data-cell span{font-size:13px;color:var(--text-3);}
.data-cell i{
  display:block;height:2px;margin-top:14px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  border-radius:2px;
}

/* FAQ 两列 */
.faq-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(18px,2.4vw,28px);
  align-items:start;
}
.faq-item{
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--glass-border);
  padding:20px 22px;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .24s ease,background .24s ease;
}
.faq-item[open]{border-color:rgba(53,224,200,.3);background:rgba(47,107,255,.06);}
.faq-item summary{
  display:flex;align-items:flex-start;gap:14px;
  cursor:pointer;
  font-size:16px;font-weight:600;
  list-style:none;
  min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;margin-top:4px;
  border-radius:8px;
  border:1px solid var(--line-strong);
  position:relative;
  transition:transform .24s ease,border-color .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--accent);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:1.6px;}
.faq-icon::after{width:1.6px;height:12px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(53,224,200,.55);}
.faq-item p{
  margin-top:12px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:14px;line-height:1.85;
  color:var(--text-2);
}

/* CTA 整宽 */
.cta-panel{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--glass-border);
  padding:clamp(30px,4vw,56px);
  display:grid;
  grid-template-columns:1.4fr auto;
  gap:28px;
  align-items:center;
}
.cta-panel::before{
  content:"";
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(105deg,rgba(5,8,15,.95),rgba(10,18,34,.82)),url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
}
.cta-panel > *{position:relative;z-index:1;}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;margin-bottom:12px;}
.cta-panel p{color:var(--text-2);font-size:15px;max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{
  margin-top:var(--sec-gap);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,18,34,.4),rgba(5,8,15,.9));
  padding:clamp(40px,5vw,68px) 0 26px;
  position:relative;z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:clamp(22px,3vw,40px);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-col p{font-size:13.5px;color:var(--text-3);margin-bottom:10px;line-height:1.75;}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--text-1);letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:2px;}
.footer-links a{
  font-size:13.5px;color:var(--text-2);
  padding:7px 0;
  transition:color .24s ease,transform .24s ease;
}
.footer-links a:hover{color:var(--accent);transform:translateX(2px);}
.sub-form{display:flex;flex-direction:column;gap:8px;margin-top:16px;}
.sub-form label{font-size:13px;color:var(--text-2);}
.sub-form input{
  height:44px;
  padding:0 14px;
  border-radius:var(--radius-sm);
  background:rgba(255,255,255,.045);
  border:1px solid var(--glass-border);
  color:var(--text-1);
  font-size:14px;
  transition:border-color .24s ease,box-shadow .24s ease;
}
.sub-form input::placeholder{color:var(--text-3);}
.sub-form input:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(53,224,200,.22);
}
.sub-form .btn-primary{align-self:flex-start;}
.sub-form .hint{font-size:12.5px;color:var(--text-3);}
.footer-bottom{
  margin-top:clamp(28px,4vw,44px);
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* 移动端 */
@media (max-width:1279px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:28px;}
}
@media (max-width:1023px){
  .nav-pill{padding:10px 12px;}
  .nav-links{
    position:fixed;
    top:0;right:0;
    height:100dvh;
    width:min(320px,86vw);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:88px 20px 32px;
    background:rgba(10,18,34,.97);
    border-left:1px solid var(--glass-border);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    transform:translateX(104%);
    transition:transform .28s ease;
    z-index:70;
    overflow-y:auto;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-link{padding:14px 16px;font-size:15px;border-radius:var(--radius-sm);}
  .nav-link.active::after{left:16px;right:auto;width:26px;bottom:8px;}
  .nav-toggle{display:block;}
  .nav-actions .btn-primary{display:none;}
  .media-row{grid-template-columns:1fr;gap:22px;}
  .media-row.reverse .media-text{order:1;}
  .media-row.reverse .media-figure{order:2;}
  .data-strip{grid-template-columns:repeat(2,1fr);}
  .data-cell{border-bottom:1px solid var(--line);}
  .data-cell:nth-child(2n){border-right:0;}
  .data-cell:nth-last-child(-n+2){border-bottom:0;}
  .faq-grid{grid-template-columns:1fr;}
  .cta-panel{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  :root{--pad-x:18px;}
  .brand-text strong{font-size:15px;}
  .step-row{grid-template-columns:auto 1fr;padding:20px;}
  .step-arrow{display:none;}
  .step-index{font-size:22px;min-width:42px;}
  .container{padding:0 var(--pad-x);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .data-strip{grid-template-columns:1fr;}
  .data-cell{border-right:0;border-bottom:1px solid var(--line);}
  .data-cell:last-child{border-bottom:0;}
  .banner-tags{gap:8px;}
  .tag{font-size:12px;padding:6px 12px;}
  .cta-actions .btn-primary,.cta-actions .btn-ghost{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1222;
  --bg-2:#0F1B31;
  --primary:#2F6BFF;
  --accent:#35E0C8;
  --signal:#FF7A1A;
  --text:#E8EEF9;
  --text-2:#9FB0C9;
  --muted:#6B7C99;
  --line:rgba(120,160,255,.14);
  --line-strong:rgba(120,160,255,.28);
  --glass:rgba(255,255,255,.045);
  --glass-solid:rgba(15,27,49,.86);
  --radius-card:18px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-card:0 18px 40px -18px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(53,224,200,.45), 0 10px 30px -8px rgba(47,107,255,.55);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"Roboto Mono","DIN Alternate",Menlo,Consolas,monospace;
  --ease:.24s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(680px 420px at 12% -6%, rgba(47,107,255,.12), transparent 62%),
    radial-gradient(620px 400px at 92% 8%, rgba(53,224,200,.10), transparent 64%),
    repeating-linear-gradient(115deg, rgba(120,160,255,.03) 0 1px, transparent 1px 96px);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:4px;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.16;font-weight:800}
h2{font-size:clamp(24px,3vw,36px)}
h3{font-size:20px;font-weight:600;line-height:1.4}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;cursor:pointer}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:clamp(56px,8vw,104px) 0}
.section-tight{padding:clamp(40px,5vw,64px) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 14px;border-radius:var(--radius-pill);
  font-size:13px;letter-spacing:.06em;color:var(--accent);
  background:rgba(53,224,200,.08);
  border:1px solid rgba(53,224,200,.28);
}
.section-head{max-width:720px;margin-bottom:clamp(28px,4vw,48px)}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.8}
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06), var(--shadow-card);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass{background:var(--glass-solid)}
}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:16px;z-index:60;padding:0 16px}
.nav-pill{
  width:min(1160px,100%);
  margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:10px 12px 10px 16px;
  border-radius:var(--radius-pill);
  background:rgba(10,18,34,.72);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07), 0 16px 40px -22px rgba(0,0,0,.9);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .nav-pill{background:rgba(10,18,34,.96)}
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-dot{
  width:38px;height:38px;flex-shrink:0;
  display:grid;place-items:center;
  border-radius:12px;
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.04em;
  color:#04121A;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 8px 22px -10px rgba(47,107,255,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;
  padding:9px 14px;border-radius:var(--radius-pill);
  font-size:14px;color:var(--text-2);
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(120,160,255,.08)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  border-radius:2px;background:var(--accent);
  box-shadow:0 0 12px rgba(53,224,200,.7);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 22px;
  border:none;border-radius:var(--radius-pill);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  color:#04121A;
  background:linear-gradient(120deg,var(--primary),var(--accent));
  box-shadow:var(--shadow-glow);
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px) scale(1.02);box-shadow:0 0 0 1px rgba(53,224,200,.6),0 14px 36px -8px rgba(47,107,255,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--radius-pill);
  font-size:14px;font-weight:600;
  color:var(--text);
  background:transparent;
  border:1px solid rgba(120,160,255,.35);
  transition:border-color var(--ease),background var(--ease),transform var(--ease);
}
.btn-ghost:hover{border-color:var(--accent);background:rgba(53,224,200,.07);transform:translateY(-1px)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--accent);
}
.btn-link svg{transition:transform var(--ease)}
.btn-link:hover svg{transform:translateX(4px)}
.nav-toggle{
  display:none;
  width:44px;height:44px;flex-shrink:0;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  background:rgba(120,160,255,.06);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:16px;height:1.6px;border-radius:2px;
  background:var(--text);transform:translateX(-50%);
  content:"";
}
.nav-toggle span{top:50%;margin-top:-.8px}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:translateX(-50%) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:translateX(-50%) rotate(-45deg)}

/* ---------- 内页横幅 ---------- */
.page-banner{
  position:relative;
  margin-top:-84px;
  padding:150px 0 clamp(48px,6vw,80px);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  filter:saturate(105%);
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,8,15,.62) 0%,rgba(5,8,15,.86) 58%,var(--bg-0) 100%),
    radial-gradient(720px 380px at 18% 20%, rgba(47,107,255,.30), transparent 68%);
}
.banner-inner{position:relative;z-index:2}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);margin-bottom:20px;
}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:rgba(120,160,255,.4)}
.crumb .current{color:var(--text-2)}
.banner-h1{max-width:16em}
.banner-sub{
  margin-top:18px;max-width:640px;
  font-size:16px;color:var(--text-2);line-height:1.85;
}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--radius-pill);
  font-size:13px;color:var(--text-2);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
}
.tag b{font-family:var(--font-mono);color:var(--accent);font-weight:600}

/* ---------- 阶梯时间轴 ---------- */
.ladder{
  display:grid;
  grid-template-columns:minmax(260px,340px) 1fr;
  gap:clamp(28px,4vw,56px);
  align-items:start;
}
.ladder-side{position:sticky;top:104px}
.ladder-side h2{max-width:9em}
.ladder-side p{margin-top:16px;color:var(--text-2);font-size:15px;line-height:1.85}
.side-note{
  margin-top:26px;padding:20px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
}
.side-note .k{font-family:var(--font-mono);font-size:26px;color:var(--accent);font-weight:700;line-height:1}
.side-note .v{display:block;margin-top:8px;font-size:13px;color:var(--muted)}
.side-media{
  margin-top:22px;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid rgba(53,224,200,.22);
  box-shadow:0 20px 44px -22px rgba(47,107,255,.9);
  position:relative;
}
.side-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.side-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.12),rgba(5,8,15,.72));
}
.side-media span{
  position:absolute;left:16px;bottom:14px;z-index:2;
  font-size:13px;color:var(--text-2);letter-spacing:.04em;
}
.steps{position:relative;display:flex;flex-direction:column;gap:18px}
.steps::before{
  content:"";position:absolute;left:23px;top:14px;bottom:14px;width:1px;
  background:linear-gradient(180deg,rgba(53,224,200,.6),rgba(47,107,255,.28) 60%,rgba(120,160,255,.06));
}
.step{
  position:relative;
  display:grid;grid-template-columns:48px 1fr;gap:18px;
  padding:22px 24px 22px 0;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.step:hover{
  transform:translateY(-4px);
  border-color:rgba(53,224,200,.34);
  background:rgba(255,255,255,.06);
}
.step-num{
  position:relative;z-index:2;
  justify-self:center;align-self:start;
  width:46px;height:46px;display:grid;place-items:center;
  border-radius:50%;
  font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--accent);
  background:rgba(5,8,15,.94);
  border:1px solid rgba(53,224,200,.42);
  box-shadow:0 0 18px rgba(53,224,200,.22);
}
.step-body h3{margin-bottom:8px}
.step-body p{color:var(--text-2);font-size:14px;line-height:1.7;max-width:62ch}
.step-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;
  font-size:13px;color:var(--muted);
}
.step-meta span{
  padding:4px 10px;border-radius:var(--radius-sm);
  background:rgba(120,160,255,.07);
  border:1px solid var(--line);
}

/* ---------- 数据卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.stat-card{
  padding:24px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color var(--ease),transform var(--ease);
}
.stat-card:hover{border-color:rgba(53,224,200,.3);transform:translateY(-3px)}
.stat-top{display:flex;align-items:baseline;gap:6px}
.stat-num{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(30px,3.6vw,44px);line-height:1;
  color:var(--text);
}
.stat-unit{font-size:14px;color:var(--muted)}
.stat-card h3{margin-top:14px;font-size:16px}
.stat-card p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.7}
.stat-bar{
  margin-top:18px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  box-shadow:0 0 12px rgba(53,224,200,.45);
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(240px,320px) 1fr;gap:clamp(24px,4vw,56px);align-items:start}
.faq-side p{margin-top:16px;color:var(--text-2);font-size:15px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item[open]{border-color:rgba(53,224,200,.3);background:rgba(255,255,255,.055)}
.faq-item summary{
  display:flex;align-items:center;gap:14px;
  padding:18px 22px;
  font-size:15px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
  min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  margin-left:auto;flex-shrink:0;
  width:26px;height:26px;position:relative;
  border-radius:50%;border:1px solid var(--line-strong);
  transition:transform var(--ease),border-color var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--accent);transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px;transition:opacity var(--ease)}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(53,224,200,.5)}
.faq-answer{padding:0 22px 22px;color:var(--text-2);font-size:14.5px;line-height:1.85}
.faq-answer p+p{margin-top:10px}

/* ---------- CTA 窄条 ---------- */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 28px;
  border-radius:var(--radius-card);
  border:1px solid rgba(53,224,200,.26);
  background:
    linear-gradient(120deg,rgba(47,107,255,.16),rgba(53,224,200,.09)),
    rgba(255,255,255,.035);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07), var(--shadow-card);
}
.cta-strip h3{font-size:18px}
.cta-strip p{margin-top:6px;font-size:14px;color:var(--text-2)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,6vw,80px);
  padding-top:clamp(40px,5vw,64px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,18,34,.4),rgba(5,8,15,0));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(24px,4vw,48px);
  padding-bottom:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.8}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.sub-form{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.sub-form label{font-size:13px;color:var(--text-2)}
.sub-form input{
  min-height:44px;padding:0 14px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.045);
  color:var(--text);font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.sub-form input::placeholder{color:var(--muted)}
.sub-form input:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(53,224,200,.18);
}
.sub-form .hint{font-size:13px;color:var(--muted);line-height:1.6}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 32px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}

/* ---------- 动效与降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .step:hover,.stat-card:hover,.btn-primary:hover,.btn-ghost:hover{transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .ladder{grid-template-columns:1fr}
  .ladder-side{position:static}
  .side-media{max-width:520px}
  .faq-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .nav-link{padding:9px 10px;font-size:13.5px}
  .brand-text em{display:none}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .site-header{top:10px;padding:0 10px}
  .nav-pill{padding:8px 10px 8px 12px;gap:10px}
  .nav-toggle{display:block}
  .nav-links{
    position:fixed;top:0;right:0;z-index:80;
    width:min(320px,84vw);height:100%;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:88px 20px 28px;
    background:rgba(10,18,34,.97);
    border-left:1px solid var(--line);
    box-shadow:-24px 0 60px -30px rgba(0,0,0,.95);
    transform:translateX(104%);
    transition:transform .28s ease;
    overflow-y:auto;
  }
  .nav-pill.open .nav-links{transform:translateX(0)}
  .nav-link{font-size:15px;padding:14px 16px;border-radius:var(--radius-sm)}
  .nav-link.active::after{left:16px;right:auto;width:22px}
  .nav-actions .btn-primary{display:none}
  .nav-pill.open .nav-actions .btn-primary{
    display:inline-flex;position:absolute;left:20px;right:20px;bottom:28px;
  }
  .page-banner{margin-top:-72px;padding-top:132px}
  .banner-h1{max-width:none;font-size:clamp(26px,7vw,34px)}
  .step{grid-template-columns:40px 1fr;gap:12px;padding:20px 18px 20px 0}
  .step-num{width:40px;height:40px;font-size:14px}
  .steps::before{left:19px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stat-card{padding:18px}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:22px}
  .cta-strip .btn-primary{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-col{border-bottom:1px solid var(--line);padding-bottom:20px}
  .footer-col:last-child{border-bottom:none}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .stat-grid{grid-template-columns:1fr}
  .banner-tags{gap:8px}
  .tag{font-size:12px;padding:6px 12px}
  .step-body p{font-size:13.5px}
  .faq-item summary{padding:16px 18px;font-size:14.5px}
  .faq-answer{padding:0 18px 20px;font-size:14px}
  body{font-size:15px}
}