/* roulang page: index */
:root{
  --ink-950:#050B14;
  --ink-900:#08131F;
  --ink-800:#0D1C2B;
  --aurora:#1FD1B2;
  --aurora-bright:#35E8C6;
  --aurora-deep:#0E8F7C;
  --silver:#9DB3C4;
  --amber:#F2A33C;
  --text:#E8F1F6;
  --text-2:#9DB0BE;
  --text-3:#6B8394;
  --stroke:rgba(125,180,200,0.14);
  --stroke-strong:rgba(255,255,255,0.09);
  --glass:rgba(255,255,255,0.055);
  --r-card:14px;
  --r-btn:10px;
  --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset, 0 18px 40px -20px rgba(0,0,0,0.7);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--text);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(480px circle at 88% 4%, rgba(31,209,178,0.13), transparent 68%),
    radial-gradient(420px circle at 6% 98%, rgba(31,209,178,0.085), transparent 70%),
    linear-gradient(rgba(125,180,200,0.042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,180,200,0.042) 1px, transparent 1px);
  background-size:auto, auto, 32px 32px, 32px 32px;
  background-repeat:no-repeat, no-repeat, repeat, repeat;
  background-attachment:fixed;
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--aurora);outline-offset:2px}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:-0.02em;line-height:1.3;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.mono{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums}
.shell{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:768px){.shell{padding:0 32px}}
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:88px 0}}
.divider{height:1px;border:0;margin:0;background:linear-gradient(90deg, transparent, rgba(125,180,200,0.22), transparent)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,11,20,0.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(8,19,31,0.86);
  border-bottom-color:var(--stroke);
  box-shadow:0 12px 34px -22px rgba(0,0,0,0.9);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:11px;min-height:44px}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(150deg, rgba(31,209,178,0.28), rgba(31,209,178,0.06));
  border:1px solid rgba(31,209,178,0.42);
  box-shadow:0 0 22px -8px rgba(31,209,178,0.7);
  color:var(--aurora-bright);font-weight:700;font-size:15px;letter-spacing:0;
}
.brand-name{font-size:1.0625rem;font-weight:700;letter-spacing:-0.01em;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--aurora)}
.nav-links{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;min-height:44px;
  padding:0 14px;border-radius:10px;color:var(--text-2);font-size:.9375rem;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--aurora),var(--aurora-deep));
  transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,0.04)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--aurora-bright)}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:.9375rem;font-weight:600;white-space:nowrap;
  transition:transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.btn-primary{
  color:#04231E;background:linear-gradient(180deg,var(--aurora-bright),var(--aurora));
  box-shadow:0 0 0 1px rgba(31,209,178,0.45), 0 10px 34px -10px rgba(31,209,178,0.55);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(31,209,178,0.6), 0 14px 40px -10px rgba(31,209,178,0.7)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(31,209,178,0.4), 0 6px 16px -10px rgba(31,209,178,0.5)}
.btn-ghost{
  color:var(--text);background:var(--glass);border:1px solid var(--stroke-strong);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.btn-ghost:hover{transform:translateY(-1px);border-color:rgba(31,209,178,0.5);color:var(--aurora-bright);background:rgba(31,209,178,0.07)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:0 16px;font-size:.875rem}
.nav-cta{display:none}
@media (min-width:1024px){.nav-cta{display:inline-flex}}
.burger{
  width:44px;height:44px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--stroke-strong);background:var(--glass);color:var(--text);
}
@media (min-width:1024px){.burger{display:none}}
.burger:hover{border-color:rgba(31,209,178,0.5);color:var(--aurora-bright)}
.burger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px}
.burger span::before{top:-6px}
.burger span::after{top:6px}

.drawer-mask{position:fixed;inset:0;background:rgba(2,6,12,0.72);backdrop-filter:blur(3px);opacity:0;pointer-events:none;transition:opacity .22s var(--ease);z-index:70}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);z-index:80;
  background:rgba(8,19,31,0.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--stroke);
  transform:translateX(100%);transition:transform .26s var(--ease);
  padding:22px 20px 32px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--stroke-strong);background:var(--glass);display:grid;place-items:center;color:var(--text)}
.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
  color:var(--text-2);font-size:1rem;border:1px solid transparent;
}
.drawer-link:hover,.drawer-link.active{color:var(--aurora-bright);background:rgba(31,209,178,0.08);border-color:rgba(31,209,178,0.28)}
.drawer .btn{margin-top:14px;width:100%}

/* ---------- Hero ---------- */
.hero{padding:44px 0 24px}
@media (min-width:1024px){.hero{padding:76px 0 36px}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.38fr 1fr;gap:48px}}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:.8125rem;color:var(--aurora-bright);
  background:rgba(31,209,178,0.08);border:1px solid rgba(31,209,178,0.3);
}
.pill i{width:6px;height:6px;border-radius:999px;background:var(--aurora-bright);box-shadow:0 0 10px var(--aurora-bright);display:block}
.hero h1{
  margin-top:20px;
  font-size:clamp(2rem,4.2vw,3.25rem);
  font-weight:700;letter-spacing:-0.02em;line-height:1.2;
}
.hero h1 span{color:var(--aurora-bright)}
.hero-sub{margin-top:18px;max-width:620px;color:var(--text-2);font-size:1rem;line-height:1.75;text-align:justify}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust{display:flex;flex-wrap:wrap;align-items:center;gap:0;margin-top:28px;color:var(--text-3);font-size:.8125rem}
.trust span{padding:0 14px;border-left:1px solid var(--stroke)}
.trust span:first-child{padding-left:0;border-left:0}

.hero-visual{position:relative}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--stroke-strong);box-shadow:var(--shadow-card);
  aspect-ratio:4/3.2;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg, rgba(5,11,20,0.42), rgba(5,11,20,0.88) 78%);
}
.hero-media .media-label{
  position:absolute;left:20px;bottom:18px;z-index:2;color:var(--text-2);font-size:.8125rem;line-height:1.6;
}
.hero-media .media-label strong{display:block;color:var(--text);font-size:.9375rem;font-weight:600;margin-bottom:2px}
.float-card{
  position:absolute;z-index:3;border-radius:12px;padding:14px 16px;
  background:rgba(13,28,43,0.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,0.1);
  box-shadow:0 1px 0 rgba(255,255,255,0.05) inset, 0 20px 40px -22px rgba(0,0,0,0.9);
  min-width:156px;
}
.float-card .num{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;color:var(--aurora-bright);font-size:1.5rem;font-weight:700;line-height:1.1}
.float-card .cap{color:var(--text-2);font-size:.75rem;margin-top:4px}
.float-a{top:-16px;left:-8px}
.float-b{bottom:-22px;right:6px}
@media (max-width:640px){
  .float-a{top:-12px;left:0}
  .float-b{bottom:-16px;right:0}
}

/* ---------- 提问条 ---------- */
.asks{display:grid;gap:14px;margin-top:40px}
@media (min-width:768px){.asks{grid-template-columns:repeat(2,1fr);gap:16px 32px}}
.ask{
  padding-left:16px;border-left:3px solid var(--aurora);
  color:var(--text-2);font-size:.9375rem;line-height:1.7;
}

/* ---------- 板块标题 ---------- */
.sec-head{max-width:760px}
.sec-kicker{
  display:inline-block;font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:.75rem;letter-spacing:.14em;color:var(--aurora);text-transform:uppercase;
}
.sec-head h2{margin-top:12px;font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;line-height:1.3}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:1rem;text-align:justify}

/* ---------- 方案卡 ---------- */
.solutions{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media (min-width:1024px){.solutions{grid-template-columns:repeat(3,1fr)}}
.sol-main{
  grid-column:span 1;
  border-radius:var(--r-card);
  background:linear-gradient(180deg, rgba(13,28,43,0.92), rgba(8,19,31,0.92));
  border:1px solid rgba(31,209,178,0.26);
  box-shadow:var(--shadow-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--ease), border-color .2s var(--ease);
}
@media (min-width:1024px){.sol-main{grid-column:span 2;flex-direction:row}}
.sol-main:hover{transform:translateY(-2px);border-color:rgba(31,209,178,0.48)}
.sol-main .pic{position:relative;flex:1 1 46%;min-height:230px;background:url('/assets/images/coverpic/cover-1.png') center/cover no-repeat}
.sol-main .pic::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(5,11,20,0.15), rgba(5,11,20,0.72))}
@media (min-width:1024px){.sol-main .pic::after{background:linear-gradient(90deg, rgba(5,11,20,0.1), rgba(8,19,31,0.96))}}
.sol-main .body{padding:28px 26px 30px;flex:1 1 54%;display:flex;flex-direction:column}
.sol-index{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:.8125rem;color:var(--aurora);letter-spacing:.1em}
.sol-main h3{margin-top:12px;font-size:1.25rem;font-weight:600}
.sol-main p{margin-top:12px;color:var(--text-2);font-size:.9375rem;line-height:1.75}
.inline-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:18px;
  color:var(--aurora-bright);font-size:.9375rem;font-weight:600;
}
.inline-link:hover{gap:10px}
.inline-link::after{content:"→";transition:transform .18s var(--ease)}
.sol-side{
  border-radius:var(--r-card);padding:26px;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--stroke-strong);box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;
  transition:transform .2s var(--ease), border-color .2s var(--ease);
}
.sol-side:hover{transform:translateY(-2px);border-color:rgba(31,209,178,0.4)}
.sol-side.accent{border-color:rgba(242,163,60,0.3)}
.sol-ico{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  background:rgba(31,209,178,0.1);border:1px solid rgba(31,209,178,0.3);color:var(--aurora-bright);
}
.sol-side.accent .sol-ico{background:rgba(242,163,60,0.1);border-color:rgba(242,163,60,0.32);color:var(--amber)}
.sol-side h3{margin-top:18px;font-size:1.125rem;font-weight:600}
.sol-side p{margin-top:10px;color:var(--text-2);font-size:.9375rem;line-height:1.75}
.sol-side .inline-link{padding-top:16px}

/* ---------- 数据区 ---------- */
.stats{display:grid;grid-template-columns:repeat(2,1fr);margin-top:36px}
@media (min-width:1024px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{padding:14px 22px;border-left:1px solid var(--stroke)}
.stat:first-child{border-left:0}
@media (max-width:1023px){
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(n+3){margin-top:24px}
}
.stat .num{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;
  font-size:clamp(1.75rem,2.5vw,2.5rem);font-weight:700;color:var(--aurora-bright);line-height:1.1;
}
.stat .num small{font-size:.5em;color:var(--aurora);margin-left:2px}
.stat .cap{margin-top:8px;color:var(--text-2);font-size:.875rem}
.bar{height:2px;border-radius:2px;background:rgba(125,180,200,0.16);margin-top:12px;overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--aurora-deep),var(--aurora-bright));border-radius:2px}

/* ---------- 资讯列表 ---------- */
.posts{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media (min-width:768px){.posts{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.posts{grid-template-columns:repeat(3,1fr)}}
.post-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  background:rgba(13,28,43,0.7);
  border:1px solid var(--stroke-strong);box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease), border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(31,209,178,0.46)}
.post-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-800)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-badge{
  position:absolute;top:12px;left:12px;z-index:2;
  padding:4px 10px;border-radius:999px;font-size:.75rem;
  color:var(--aurora-bright);background:rgba(5,11,20,0.66);
  border:1px solid rgba(31,209,178,0.34);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-body h3{
  font-size:1.0625rem;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body p{
  margin-top:10px;color:var(--text-2);font-size:.875rem;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--stroke);
  display:flex;align-items:center;justify-content:space-between;
  color:var(--text-3);font-size:.8125rem;
}
.post-foot .arrow{color:var(--aurora);transition:transform .2s var(--ease)}
.post-card:hover .post-foot .arrow{transform:translateX(4px)}
.empty-panel{
  margin-top:36px;padding:52px 24px;border-radius:var(--r-card);
  border:1px dashed rgba(125,180,200,0.3);background:rgba(255,255,255,0.03);
  text-align:center;color:var(--text-2);
}
.empty-panel .btn{margin-top:20px}

/* ---------- FAQ ---------- */
.faq{margin-top:36px;border-top:1px solid var(--stroke)}
.faq details{border-bottom:1px solid var(--stroke)}
.faq summary{
  display:flex;align-items:center;gap:14px;
  min-height:60px;padding:18px 0;cursor:pointer;list-style:none;
  font-size:1rem;font-weight:600;color:var(--text);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--aurora-bright)}
.faq .mark{width:8px;height:8px;flex:none;background:var(--aurora);border-radius:2px;box-shadow:0 0 10px rgba(31,209,178,0.7)}
.faq .plus{
  margin-left:auto;width:16px;height:16px;position:relative;flex:none;color:var(--text-3);
  transition:transform .22s var(--ease), color .22s var(--ease);
}
.faq .plus::before,.faq .plus::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq .plus::before{left:0;top:7px;width:16px;height:2px}
.faq .plus::after{top:0;left:7px;width:2px;height:16px}
.faq details[open] .plus{transform:rotate(45deg);color:var(--aurora-bright)}
.faq .ans{padding:0 0 22px 22px;color:var(--text-2);font-size:.9375rem;line-height:1.8;text-align:justify}

/* ---------- 表单 ---------- */
.form-wrap{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding:34px 26px;border-radius:var(--r-card);
  background:rgba(13,28,43,0.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--stroke-strong);box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.form-wrap{grid-template-columns:1fr 1.1fr;gap:48px;padding:44px 40px}}
.form-wrap h2{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.3}
.form-wrap .lead{margin-top:14px;color:var(--text-2);font-size:.9375rem;line-height:1.8;text-align:justify}
.form-points{margin-top:22px;display:grid;gap:10px}
.form-points li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:.875rem}
.form-points li::before{content:"";width:6px;height:6px;margin-top:9px;flex:none;border-radius:2px;background:var(--aurora)}
.field{margin-bottom:16px}
.field label{display:block;font-size:.875rem;color:var(--text-2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-btn);
  background:rgba(5,11,20,0.6);border:1px solid var(--stroke);
  color:var(--text);font-size:.9375rem;font-family:inherit;
  transition:border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:hover,.field textarea:hover{border-color:rgba(125,180,200,0.28)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--aurora);box-shadow:0 0 0 3px rgba(31,209,178,0.16)}
.field textarea{min-height:104px;resize:vertical}
.field.error input,.field.error textarea{border-color:var(--amber)}
.field .err-msg{display:none;margin-top:6px;color:var(--amber);font-size:.8125rem}
.field.error .err-msg{display:flex;align-items:center;gap:6px}
.field .err-msg::before{content:"!";display:grid;place-items:center;width:14px;height:14px;border-radius:999px;border:1px solid var(--amber);font-size:10px;line-height:1}
.form-ok{
  display:none;align-items:center;gap:10px;padding:16px 18px;border-radius:var(--r-btn);
  background:rgba(31,209,178,0.08);border:1px solid rgba(31,209,178,0.34);color:var(--aurora-bright);font-size:.9375rem;
}
.form-ok.show{display:flex}
.privacy{
  display:flex;gap:10px;margin-top:18px;color:var(--text-3);font-size:.8125rem;line-height:1.7;
}
.privacy svg{flex:none;margin-top:3px;color:var(--amber)}
.privacy a{color:var(--text-2);text-decoration:underline;text-underline-offset:3px}
.privacy a:hover{color:var(--aurora-bright)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:56px;padding-top:64px;
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg, transparent, rgba(125,180,200,0.28), transparent) 1;
  background:linear-gradient(180deg, rgba(8,19,31,0.4), rgba(5,11,20,0.9));
}
.foot-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}}
.foot-brand p{margin-top:16px;color:var(--text-2);font-size:.875rem;line-height:1.8;max-width:340px}
.foot-contact{margin-top:16px;color:var(--text-3);font-size:.8125rem}
.foot-contact strong{color:var(--text-2);font-weight:600}
.foot-title{font-size:.875rem;font-weight:600;color:var(--text);letter-spacing:.02em}
.foot-list{margin-top:16px;display:grid;gap:4px}
.foot-list a{display:inline-flex;align-items:center;min-height:36px;color:var(--text-2);font-size:.875rem}
.foot-list a:hover{color:var(--aurora-bright)}
.foot-bottom{
  margin-top:48px;padding:22px 0 32px;border-top:1px solid var(--stroke);
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
  color:var(--text-3);font-size:.8125rem;
}
.foot-bottom .mono{font-size:.75rem;color:var(--text-3)}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:50;
  width:48px;height:48px;border-radius:999px;display:grid;place-items:center;
  background:rgba(13,28,43,0.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--stroke-strong);color:var(--text-2);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .24s var(--ease), transform .24s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{color:var(--aurora-bright);border-color:rgba(31,209,178,0.5)}

/* roulang page: article */
:root{
  --ink-950:#050B14;
  --ink-900:#08131F;
  --ink-800:#0D1C2B;
  --aurora:#1FD1B2;
  --aurora-bright:#35E8C6;
  --aurora-deep:#0E8F7C;
  --silver:#9DB3C4;
  --amber:#F2A33C;
  --text:#E8F1F6;
  --text-2:#9DB0BE;
  --text-3:#6B8394;
  --line:rgba(125,180,200,.14);
  --line-strong:rgba(125,180,200,.26);
  --glass:rgba(255,255,255,.055);
  --radius-card:14px;
  --radius-btn:10px;
  --shell:1200px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset, 0 18px 40px -20px rgba(0,0,0,.7);
  --glow:0 0 0 1px rgba(31,209,178,.45), 0 10px 34px -10px rgba(31,209,178,.55);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:1rem;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(460px 460px at 88% 3%, rgba(31,209,178,.16), transparent 70%),
    radial-gradient(420px 420px at 4% 97%, rgba(31,209,178,.09), transparent 72%),
    linear-gradient(rgba(125,180,200,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,180,200,.045) 1px, transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
  background-attachment:fixed,fixed,fixed,fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .16s ease-out,border-color .16s ease-out,background-color .16s ease-out;}
button,input,textarea,select{font:inherit;color:inherit;}
.mono{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.shell{padding:0 32px;}}
:focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:6px;}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:60;transition:background-color .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;}
.site-header.is-stuck{background:rgba(8,19,31,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);box-shadow:0 14px 30px -22px rgba(0,0,0,.9);}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--aurora),var(--aurora-deep));
  color:#04140F;font-weight:800;font-size:1.05rem;letter-spacing:-.03em;
  box-shadow:0 8px 22px -12px rgba(31,209,178,.85);
}
.brand-name{font-size:1.0625rem;font-weight:700;letter-spacing:-.01em;color:var(--text);}
.brand-name em{font-style:normal;color:var(--aurora);margin-left:1px;}
.nav-links{display:none;align-items:center;gap:30px;}
.nav-link{position:relative;font-size:.9375rem;color:var(--text-2);padding:8px 0;min-height:44px;display:inline-flex;align-items:center;}
.nav-link::after{content:"";position:absolute;left:0;bottom:8px;width:0;height:2px;background:var(--aurora);transition:width .2s ease-out;}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--aurora);}
.nav-link.active::after{width:100%;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-cta{display:none;}
.burger{
  width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:var(--glass);display:grid;place-items:center;cursor:pointer;transition:border-color .16s ease-out,background-color .16s ease-out;
}
.burger:hover{border-color:var(--line-strong);}
.burger span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
@media(min-width:1024px){
  .nav-links{display:flex;}
  .nav-cta{display:inline-flex;}
  .burger{display:none;}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:.9375rem;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .16s ease-out,box-shadow .16s ease-out,background-color .16s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.btn-sm{min-height:44px;padding:0 18px;font-size:.875rem;}
.btn-primary{background:linear-gradient(140deg,var(--aurora),var(--aurora-deep));color:#03150F;box-shadow:var(--glow);}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(31,209,178,.5),0 4px 14px -8px rgba(31,209,178,.6);}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);}
.btn-ghost:hover{border-color:rgba(31,209,178,.5);color:var(--aurora-bright);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(3,8,15,.72);opacity:0;pointer-events:none;transition:opacity .22s ease-out;z-index:80;}
.drawer-mask.show{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(340px,86vw);z-index:90;
  background:rgba(8,19,31,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);transform:translateX(104%);transition:transform .26s ease-out;
  padding:26px 22px;display:flex;flex-direction:column;gap:6px;
}
.drawer.show{transform:translateX(0);}
.drawer .brand{margin-bottom:20px;}
.drawer-close{position:absolute;top:18px;right:18px;width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);background:var(--glass);cursor:pointer;color:var(--text-2);}
.drawer-close:hover{color:var(--text);border-color:var(--line-strong);}
.drawer a.drawer-link{display:flex;align-items:center;min-height:52px;padding:0 12px;border-radius:var(--radius-btn);color:var(--text-2);border:1px solid transparent;font-size:.9375rem;}
.drawer a.drawer-link:hover,.drawer a.drawer-link.active{color:var(--aurora);border-color:var(--line);background:rgba(31,209,178,.06);}
.drawer .btn{margin-top:18px;width:100%;}

/* ---------- article wrap ---------- */
.article-top{position:relative;padding:44px 0 8px;overflow:hidden;}
.article-top::before{
  content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.16;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent);z-index:-1;
}
.crumbs{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 22px;padding:0;font-size:.8125rem;color:var(--text-3);}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:var(--line-strong);}
.crumbs a:hover{color:var(--aurora-bright);}
.crumbs li.current{color:var(--aurora);}
.page-title{font-size:clamp(1.75rem,3.6vw,2.75rem);font-weight:700;line-height:1.25;letter-spacing:-.02em;margin:0 0 18px;max-width:900px;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:.8125rem;color:var(--text-2);}
.meta-row .dot{width:1px;height:14px;background:var(--line-strong);}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);color:var(--aurora);font-size:.8125rem;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}

/* ---------- grid ---------- */
.article-grid{display:grid;grid-template-columns:1fr;gap:34px;padding:44px 0 8px;}
@media(min-width:1024px){
  .article-grid{grid-template-columns:minmax(0,68fr) minmax(0,32fr);gap:40px;align-items:start;}
}
.article-main{min-width:0;}
.article-cover{border-radius:var(--radius-card);border:1px solid var(--line);overflow:hidden;margin:0 0 28px;box-shadow:var(--shadow-card);}
.article-cover img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;}

/* ---------- long form ---------- */
.article-body{max-width:720px;font-size:1.0625rem;line-height:1.9;color:#DCE8EF;}
.article-body>*+*{margin-top:1.15em;}
.article-body p{margin:0;text-align:justify;}
.article-body h2{
  position:relative;margin-top:2em;margin-bottom:.7em;padding-left:14px;
  font-size:clamp(1.3rem,2.2vw,1.625rem);font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--text);
}
.article-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--aurora),var(--aurora-deep));}
.article-body h3{margin-top:1.6em;margin-bottom:.5em;font-size:1.1875rem;font-weight:600;color:var(--text);}
.article-body a{color:var(--aurora);border-bottom:1px solid rgba(31,209,178,.4);}
.article-body a:hover{color:var(--aurora-bright);border-bottom-color:var(--aurora-bright);}
.article-body strong{color:var(--text);}
.article-body ul,.article-body ol{margin:0;padding-left:1.35em;}
.article-body li{margin:.45em 0;}
.article-body ul li::marker{color:var(--aurora);}
.article-body ol li::marker{color:var(--aurora);font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);border-left:3px solid var(--aurora);
  color:var(--text-2);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.article-body blockquote p{text-align:left;}
.article-body img{border-radius:12px;border:1px solid var(--line);margin:1.6em 0 8px;}
.article-body figcaption,.article-body .caption{font-size:.8125rem;color:var(--text-3);text-align:center;margin-bottom:1.6em;}
.article-body hr{border:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);margin:2.2em 0;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:.9375rem;display:block;overflow-x:auto;
  border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.03);
}
.article-body thead th{background:rgba(31,209,178,.08);color:var(--text);font-weight:600;text-align:left;white-space:nowrap;}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body tbody tr:hover{background:rgba(255,255,255,.03);}
.article-body code{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:.875em;background:rgba(31,209,178,.1);color:var(--aurora-bright);padding:2px 6px;border-radius:6px;}
.empty-note{
  max-width:720px;padding:34px 26px;border-radius:var(--radius-card);
  border:1px dashed var(--line-strong);background:var(--glass);text-align:center;
}
.empty-note strong{display:block;font-size:1.125rem;margin-bottom:8px;color:var(--text);}
.empty-note p{color:var(--text-2);margin:0 0 18px;font-size:.9375rem;}

/* ---------- tags & post nav ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:38px 0 0;max-width:720px;}
.tag{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;background:var(--glass);border:1px solid var(--line);color:var(--text-2);font-size:.8125rem;transition:color .16s ease-out,border-color .16s ease-out;}
.tag:hover{color:var(--aurora);border-color:rgba(31,209,178,.45);}
.post-nav{display:grid;grid-template-columns:1fr;gap:14px;margin:30px 0 0;max-width:720px;}
@media(min-width:640px){.post-nav{grid-template-columns:1fr 1fr;}}
.post-nav a{
  display:block;padding:18px 20px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);transition:transform .18s ease-out,border-color .18s ease-out;
}
.post-nav a:hover{transform:translateY(-2px);border-color:rgba(31,209,178,.45);}
.post-nav .k{display:block;font-size:.75rem;color:var(--text-3);margin-bottom:6px;letter-spacing:.04em;}
.post-nav .v{display:block;font-size:.9375rem;font-weight:600;color:var(--text);}
.post-nav a:hover .v{color:var(--aurora-bright);}

/* ---------- sidebar ---------- */
.aside{display:flex;flex-direction:column;gap:18px;min-width:0;}
@media(min-width:1024px){.aside{position:sticky;top:94px;}}
.side-card{
  border-radius:var(--radius-card);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:var(--shadow-card);padding:20px;
}
.side-title{font-size:.8125rem;letter-spacing:.06em;color:var(--text-3);margin:0 0 14px;font-weight:600;}
.toc{list-style:none;margin:0;padding:0;position:relative;}
.toc::before{content:"";position:absolute;left:3px;top:6px;bottom:6px;width:1px;background:var(--line-strong);}
.toc li{position:relative;padding-left:20px;}
.toc a{display:block;padding:7px 0;font-size:.875rem;color:var(--text-2);min-height:40px;line-height:1.5;}
.toc a::before{content:"";position:absolute;left:0;top:16px;width:7px;height:7px;border-radius:999px;background:var(--line-strong);transition:background-color .16s ease-out;}
.toc a:hover{color:var(--aurora-bright);}
.toc a:hover::before{background:var(--aurora);}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li+li{border-top:1px solid var(--line);}
.side-list a{display:flex;gap:12px;align-items:flex-start;padding:12px 0;font-size:.875rem;color:var(--text-2);}
.side-list a:hover{color:var(--aurora-bright);}
.side-list .idx{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-size:.75rem;color:var(--aurora);padding-top:3px;}
.side-cta{background:linear-gradient(160deg,rgba(31,209,178,.14),rgba(255,255,255,.05));border-color:rgba(31,209,178,.3);}
.side-cta p{margin:0 0 16px;font-size:.875rem;color:var(--text-2);}
.side-cta .btn{width:100%;}
.side-note{font-size:.75rem;color:var(--text-3);margin:10px 0 0;}

/* ---------- related ---------- */
.section{padding:64px 0;}
@media(min-width:1024px){.section{padding:88px 0;}}
.section-head{margin-bottom:32px;}
.section-kicker{display:inline-block;font-size:.75rem;letter-spacing:.12em;color:var(--aurora);margin-bottom:10px;}
.section-title{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;line-height:1.3;letter-spacing:-.015em;margin:0;}
.section-sub{margin:12px 0 0;color:var(--text-2);font-size:.9375rem;max-width:720px;}
.divider{height:1px;border:0;margin:0;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:768px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);}}
.post-card{
  display:flex;flex-direction:column;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);transition:transform .18s ease-out,border-color .18s ease-out;
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(31,209,178,.45);}
.post-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-800);}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.post-card:hover .thumb img{transform:scale(1.03);}
.post-card .thumb .badge{position:absolute;left:12px;top:12px;background:rgba(8,19,31,.7);}
.post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card h3{margin:0;font-size:1.0625rem;font-weight:600;line-height:1.5;color:var(--text);}
.post-card:hover h3{color:var(--aurora-bright);}
.post-card p{margin:0;font-size:.875rem;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:.75rem;color:var(--text-3);}
.post-card .arrow{color:var(--aurora);transition:transform .18s ease-out;}
.post-card:hover .arrow{transform:translateX(4px);}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;background:none;border:0;cursor:pointer;
  padding:18px 0;min-height:56px;font-size:1rem;font-weight:600;color:var(--text);transition:color .16s ease-out;
}
.faq-q:hover{color:var(--aurora-bright);}
.faq-q .sq{width:8px;height:8px;border-radius:2px;background:var(--aurora);flex:0 0 8px;}
.faq-q .plus{margin-left:auto;position:relative;width:16px;height:16px;flex:0 0 16px;}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;left:50%;top:50%;background:var(--text-2);transition:transform .2s ease-out,background-color .2s ease-out;}
.faq-q .plus::before{width:14px;height:1.5px;transform:translate(-50%,-50%);}
.faq-q .plus::after{width:1.5px;height:14px;transform:translate(-50%,-50%);}
.faq-item.open .faq-q .plus::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item.open .faq-q .plus::before{background:var(--aurora);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease-out;}
.faq-a p{margin:0;padding:0 0 20px 22px;color:var(--text-2);font-size:.9375rem;}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid transparent;border-image:linear-gradient(90deg,transparent,rgba(31,209,178,.45),transparent) 1;background:rgba(5,11,20,.72);padding:64px 0 28px;margin-top:20px;}
.foot-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media(min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1.2fr 1fr;gap:40px;}}
.foot-brand p{margin:16px 0 12px;font-size:.875rem;color:var(--text-2);max-width:340px;}
.foot-contact{font-size:.8125rem;color:var(--text-3);}
.foot-contact strong{color:var(--silver);font-weight:600;}
.foot-title{font-size:.8125rem;letter-spacing:.06em;color:var(--text);font-weight:600;margin-bottom:16px;}
.foot-list{display:flex;flex-direction:column;gap:2px;}
.foot-list a{display:inline-flex;align-items:center;min-height:40px;font-size:.875rem;color:var(--text-2);}
.foot-list a:hover{color:var(--aurora-bright);}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:.75rem;color:var(--text-3);
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:48px;height:48px;border-radius:999px;z-index:70;
  border:1px solid var(--line);background:rgba(8,19,31,.8);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  color:var(--aurora);cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s ease-out,transform .2s ease-out;
  display:grid;place-items:center;
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-2px);border-color:rgba(31,209,178,.5);}

/* roulang page: category1 */
:root{
    --ink-950:#050B14;
    --ink-900:#08131F;
    --ink-800:#0D1C2B;
    --aurora:#1FD1B2;
    --aurora-bright:#35E8C6;
    --aurora-deep:#0E8F7C;
    --silver:#9DB3C4;
    --amber:#F2A33C;
    --text:#E8F1F6;
    --text-2:#9DB0BE;
    --text-3:#6B8394;
    --line:rgba(125,180,200,0.14);
    --glass:rgba(255,255,255,0.055);
    --glass-line:rgba(255,255,255,0.09);
    --r-card:14px;
    --r-btn:10px;
    --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset, 0 18px 40px -20px rgba(0,0,0,0.7);
    --ease:cubic-bezier(0.22,0.61,0.36,1);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--text);
    background-color:var(--ink-950);
    background-image:
      radial-gradient(480px 480px at 88% 4%, rgba(31,209,178,0.10), transparent 70%),
      radial-gradient(420px 420px at 4% 96%, rgba(31,209,178,0.07), transparent 70%),
      linear-gradient(rgba(125,180,200,0.042) 1px, transparent 1px),
      linear-gradient(90deg, rgba(125,180,200,0.042) 1px, transparent 1px);
    background-size:auto, auto, 32px 32px, 32px 32px;
    background-attachment:fixed, fixed, scroll, scroll;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}

  :focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:4px;}

  .mono{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media (min-width:1024px){ .shell{padding-left:32px;padding-right:32px;} }

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:70;
    background:rgba(5,11,20,0.72);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid transparent;
    transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(8,19,31,0.88);
    border-bottom-color:var(--line);
    box-shadow:0 14px 32px -26px rgba(0,0,0,0.95);
  }
  .nav-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
  .brand{display:inline-flex;align-items:center;gap:10px;}
  .brand-mark{
    width:36px;height:36px;flex:0 0 auto;border-radius:10px;display:grid;place-items:center;
    font-size:1rem;font-weight:800;color:#04140F;letter-spacing:-0.02em;
    background:linear-gradient(140deg,var(--aurora-bright),var(--aurora-deep));
    box-shadow:0 8px 22px -12px rgba(31,209,178,0.8);
  }
  .brand-name{font-size:1.0625rem;font-weight:700;letter-spacing:-0.01em;color:var(--text);white-space:nowrap;}
  .brand-name em{font-style:normal;color:var(--aurora);}
  .nav-links{display:flex;align-items:center;gap:28px;}
  .nav-link{
    position:relative;font-size:0.9375rem;line-height:1.4;color:var(--text-2);
    padding:10px 0;transition:color .16s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;border-radius:2px;
    background:var(--aurora);transform:scaleX(0);transform-origin:left;
    transition:transform .18s var(--ease);
  }
  .nav-link:hover{color:var(--text);}
  .nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
  .nav-link.active{color:var(--aurora);}
  .nav-right{display:flex;align-items:center;gap:12px;}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:0.9375rem;font-weight:600;line-height:1;border:1px solid transparent;
    cursor:pointer;white-space:nowrap;
    transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),filter .16s var(--ease);
  }
  .btn-primary{
    background:linear-gradient(180deg,var(--aurora-bright),var(--aurora));
    color:#04140F;
    box-shadow:0 0 0 1px rgba(31,209,178,0.45), 0 10px 34px -10px rgba(31,209,178,0.55);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,209,178,0.6),0 14px 38px -10px rgba(31,209,178,0.72);}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(31,209,178,0.5),0 6px 16px -8px rgba(31,209,178,0.55);}
  .btn-ghost{
    background:var(--glass);border-color:var(--line);color:var(--text);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .btn-ghost:hover{border-color:rgba(31,209,178,0.45);color:var(--aurora-bright);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{min-height:40px;padding:0 16px;font-size:0.875rem;}

  .burger{
    display:none;width:44px;height:44px;border-radius:10px;
    background:var(--glass);border:1px solid var(--line);cursor:pointer;
    position:relative;align-items:center;justify-content:center;
  }
  .burger span,.burger span::before,.burger span::after{
    content:"";display:block;width:18px;height:2px;border-radius:2px;background:var(--text);
    transition:transform .2s var(--ease),opacity .2s var(--ease);
  }
  .burger span{position:relative;}
  .burger span::before{position:absolute;top:-6px;left:0;}
  .burger span::after{position:absolute;top:6px;left:0;}
  .burger[aria-expanded="true"] span{background:transparent;}
  .burger[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
  .burger[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

  .nav-mask{
    position:fixed;inset:0;background:rgba(3,8,15,0.74);
    opacity:0;pointer-events:none;transition:opacity .2s var(--ease);z-index:65;
    backdrop-filter:blur(2px);
  }
  .nav-mask.show{opacity:1;pointer-events:auto;}

  /* ---------- 分类条幅 ---------- */
  .cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
  .cat-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;
    opacity:0.3;
  }
  .cat-hero-veil{
    position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(5,11,20,0.72) 0%, rgba(5,11,20,0.86) 58%, rgba(5,11,20,0.97) 100%);
  }
  .cat-hero-inner{position:relative;padding:48px 0 56px;}
  @media (min-width:768px){ .cat-hero-inner{padding:64px 0 80px;} }
  @media (min-width:1024px){ .cat-hero-inner{padding:76px 0 96px;} }

  .crumb{margin-bottom:20px;}
  .crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:0.8125rem;color:var(--text-3);}
  .crumb li{display:inline-flex;align-items:center;gap:8px;}
  .crumb li+li::before{content:"/";color:rgba(125,180,200,0.4);}
  .crumb a{color:var(--text-2);transition:color .16s var(--ease);}
  .crumb a:hover{color:var(--aurora-bright);}
  .crumb [aria-current="page"]{color:var(--aurora);}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:999px;
    background:var(--glass);border:1px solid var(--glass-line);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    font-size:0.8125rem;color:var(--silver);letter-spacing:0.02em;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--aurora);box-shadow:0 0 10px rgba(31,209,178,0.9);}

  .cat-hero h1{
    margin:20px 0 0;
    font-size:clamp(2rem,4.2vw,3.25rem);
    font-weight:700;letter-spacing:-0.02em;line-height:1.2;
    max-width:20ch;
  }
  .cat-hero h1 span{color:var(--aurora);}
  .cat-hero .lede{
    margin-top:20px;max-width:62ch;
    font-size:1rem;line-height:1.8;color:var(--text-2);text-align:justify;
  }
  .hero-meta{
    margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
    font-size:0.8125rem;color:var(--text-3);
  }
  .hero-meta i{display:block;width:1px;height:14px;background:var(--line);}
  .hero-meta .mono{color:var(--silver);}

  .btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

  /* ---------- 通用板块 ---------- */
  .section{padding:56px 0;}
  @media (min-width:1024px){ .section{padding:88px 0;} }
  .section-head{max-width:64ch;}
  .section-tag{
    display:inline-block;font-size:0.75rem;letter-spacing:0.14em;
    color:var(--aurora);text-transform:uppercase;font-weight:700;
  }
  .section h2{
    margin-top:12px;
    font-size:clamp(1.5rem,2.6vw,2.1rem);
    font-weight:700;letter-spacing:-0.015em;line-height:1.3;
  }
  .section-sub{margin-top:14px;color:var(--text-2);font-size:0.9375rem;line-height:1.8;text-align:justify;}
  .hairline{
    height:1px;border:0;margin:0;
    background:linear-gradient(90deg, rgba(125,180,200,0.22), rgba(125,180,200,0.04) 62%, transparent);
  }

  /* ---------- 错落图文 ---------- */
  .alt-flow{display:flex;flex-direction:column;gap:56px;margin-top:44px;}
  @media (min-width:1024px){ .alt-flow{gap:72px;margin-top:56px;} }
  .alt-row{display:grid;grid-template-columns:1fr;gap:26px;align-items:center;}
  @media (min-width:900px){
    .alt-row{grid-template-columns:1fr 1fr;gap:52px;}
    .alt-row.flip .alt-media{order:-1;}
  }
  .alt-media{position:relative;}
  .alt-media img{
    width:100%;height:auto;border-radius:var(--r-card);
    border:1px solid var(--glass-line);
    box-shadow:var(--shadow-card);
    object-fit:cover;
    aspect-ratio:16/10;
  }
  .alt-index{
    display:inline-flex;align-items:center;justify-content:center;
    min-width:44px;height:36px;padding:0 12px;
    border-radius:10px;border:1px solid rgba(31,209,178,0.4);
    background:rgba(31,209,178,0.08);
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-size:0.9375rem;font-weight:700;color:var(--aurora-bright);
    letter-spacing:0.04em;
  }
  .alt-body h3{
    margin-top:16px;font-size:1.25rem;font-weight:600;letter-spacing:-0.01em;line-height:1.4;
  }
  .alt-body p{margin-top:12px;color:var(--text-2);font-size:0.9375rem;line-height:1.8;text-align:justify;}
  .check-list{margin-top:18px;display:grid;gap:10px;}
  .check-list li{
    position:relative;padding-left:22px;font-size:0.9375rem;color:var(--text-2);line-height:1.7;
  }
  .check-list li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
    background:var(--aurora);opacity:0.85;
  }
  .text-link{
    display:inline-flex;align-items:center;gap:6px;margin-top:18px;
    font-size:0.9375rem;font-weight:600;color:var(--aurora);
    border-bottom:1px solid transparent;transition:border-color .16s var(--ease),color .16s var(--ease);
  }
  .text-link:hover{border-bottom-color:var(--aurora);color:var(--aurora-bright);}
  .text-link .arrow{transition:transform .18s var(--ease);}
  .text-link:hover .arrow{transform:translateX(4px);}

  /* ---------- 数据带 ---------- */
  .metric-band{
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:40px 0;margin-top:8px;
  }
  .metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 24px;}
  @media (min-width:768px){ .metrics{grid-template-columns:repeat(3,1fr);gap:0;} }
  .metric{padding:0;}
  @media (min-width:768px){
    .metric{padding:0 32px;border-left:1px solid var(--line);}
    .metric:first-child{border-left:0;padding-left:0;}
  }
  .metric .num{
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-variant-numeric:tabular-nums;
    font-size:clamp(1.75rem,2.5vw,2.5rem);font-weight:700;
    color:var(--aurora);letter-spacing:-0.02em;line-height:1.1;
  }
  .metric .num small{font-size:0.5em;margin-left:4px;color:var(--text-2);font-weight:600;}
  .metric .desc{margin-top:10px;font-size:0.875rem;color:var(--text-2);line-height:1.7;}
  .metric .bar{margin-top:14px;height:2px;border-radius:2px;background:rgba(125,180,200,0.14);overflow:hidden;}
  .metric .bar i{display:block;height:100%;background:var(--aurora);}

  /* ---------- 清单面板 ---------- */
  .panel{
    background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--r-card);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-card);
    padding:28px;
  }
  @media (min-width:1024px){ .panel{padding:36px;} }
  .quad-list{display:grid;grid-template-columns:1fr;gap:14px 32px;margin-top:22px;}
  @media (min-width:768px){ .quad-list{grid-template-columns:1fr 1fr;} }
  .quad-list li{display:flex;gap:12px;align-items:flex-start;font-size:0.9375rem;color:var(--text-2);line-height:1.75;}
  .quad-list li b{color:var(--text);font-weight:600;}
  .quad-list li::before{
    content:"";flex:0 0 auto;width:6px;height:6px;margin-top:10px;border-radius:999px;
    background:var(--aurora);box-shadow:0 0 8px rgba(31,209,178,0.7);
  }

  /* ---------- FAQ ---------- */
  .faq{margin-top:32px;border-bottom:1px solid var(--line);}
  .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:center;gap:14px;
    min-height:56px;padding:16px 0;background:none;border:0;text-align:left;cursor:pointer;
    font-size:1rem;font-weight:600;color:var(--text);line-height:1.6;
    transition:color .16s var(--ease);
  }
  .faq-q:hover{color:var(--aurora-bright);}
  .faq-square{width:8px;height:8px;flex:0 0 auto;border-radius:2px;background:var(--aurora);}
  .faq-plus{
    position:relative;margin-left:auto;width:18px;height:18px;flex:0 0 auto;
    transition:transform .2s var(--ease);
  }
  .faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--aurora);border-radius:2px;}
  .faq-plus::before{left:0;right:0;top:8px;height:2px;}
  .faq-plus::after{top:0;bottom:0;left:8px;width:2px;}
  .faq-item.open .faq-plus{transform:rotate(45deg);}
  .faq-a{display:none;padding:0 0 22px 22px;font-size:0.9375rem;color:var(--text-2);line-height:1.85;max-width:78ch;text-align:justify;}
  .faq-item.open .faq-a{display:block;}

  /* ---------- CTA 表单 ---------- */
  .cta-wrap{
    position:relative;overflow:hidden;
    border:1px solid var(--glass-line);border-radius:var(--r-card);
    background:
      radial-gradient(420px 260px at 88% 0%, rgba(31,209,178,0.14), transparent 70%),
      rgba(255,255,255,0.045);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    box-shadow:var(--shadow-card);
    padding:30px;
  }
  @media (min-width:1024px){ .cta-wrap{padding:44px;} }
  .cta-grid{display:grid;grid-template-columns:1fr;gap:32px;}
  @media (min-width:960px){ .cta-grid{grid-template-columns:1fr 0.9fr;gap:48px;align-items:start;} }
  .cta-grid h2{font-size:clamp(1.4rem,2.2vw,1.9rem);font-weight:700;line-height:1.35;letter-spacing:-0.015em;}
  .cta-grid p.cta-text{margin-top:14px;color:var(--text-2);font-size:0.9375rem;line-height:1.8;text-align:justify;}
  .cta-points{margin-top:22px;display:grid;gap:12px;}
  .cta-points li{position:relative;padding-left:22px;font-size:0.9375rem;color:var(--text-2);}
  .cta-points li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--aurora);
  }

  .form-card{
    background:rgba(8,19,31,0.62);border:1px solid var(--glass-line);
    border-radius:var(--r-card);padding:24px;
  }
  .field{margin-bottom:16px;}
  .field label{display:block;font-size:0.875rem;color:var(--text-2);margin-bottom:8px;}
  .field label .req{color:var(--amber);margin-left:4px;}
  .field input,.field textarea{
    width:100%;min-height:44px;padding:12px 14px;
    background:rgba(13,28,43,0.78);
    border:1px solid var(--line);border-radius:var(--r-btn);
    color:var(--text);font-size:0.9375rem;
    transition:border-color .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease);
  }
  .field textarea{min-height:96px;resize:vertical;line-height:1.7;}
  .field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
  .field input:focus,.field textarea:focus{
    outline:none;border-color:var(--aurora);background:rgba(13,28,43,0.95);
    box-shadow:0 0 0 3px rgba(31,209,178,0.18);
  }
  .field.invalid input,.field.invalid textarea{border-color:var(--amber);box-shadow:0 0 0 3px rgba(242,163,60,0.14);}
  .err{display:none;margin-top:6px;font-size:0.8125rem;color:var(--amber);line-height:1.6;}
  .field.invalid .err{display:block;}
  .form-actions{margin-top:20px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
  .form-note{font-size:0.8125rem;color:var(--text-3);}
  .form-success{
    display:none;padding:18px;border-radius:var(--r-btn);
    border:1px solid rgba(31,209,178,0.4);background:rgba(31,209,178,0.08);
    color:var(--aurora-bright);font-size:0.9375rem;line-height:1.75;
  }
  .form-success.show{display:block;}

  .privacy{
    display:flex;gap:10px;margin-top:22px;
    font-size:0.8125rem;line-height:1.7;color:var(--text-3);
  }
  .privacy .lock{flex:0 0 auto;width:16px;height:16px;margin-top:3px;color:var(--amber);}
  .privacy a{color:var(--text-2);border-bottom:1px solid rgba(125,180,200,0.35);transition:color .16s var(--ease),border-color .16s var(--ease);}
  .privacy a:hover{color:var(--aurora-bright);border-color:var(--aurora);}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:24px;padding:56px 0 0;
    border-top:1px solid var(--line);
    background:
      radial-gradient(420px 300px at 12% 0%, rgba(31,209,178,0.09), transparent 70%),
      rgba(8,19,31,0.62);
  }
  @media (min-width:1024px){ .site-footer{padding-top:72px;} }
  .foot-grid{display:grid;grid-template-columns:1fr;gap:34px;}
  @media (min-width:768px){ .foot-grid{grid-template-columns:1fr 1fr;gap:36px;} }
  @media (min-width:1024px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;} }
  .foot-brand p{margin-top:16px;font-size:0.875rem;color:var(--text-2);line-height:1.8;max-width:46ch;text-align:justify;}
  .foot-contact{margin-top:16px;font-size:0.8125rem;color:var(--text-3);}
  .foot-contact strong{color:var(--silver);font-weight:600;font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;}
  .foot-title{font-size:0.9375rem;font-weight:700;color:var(--text);letter-spacing:0.01em;}
  .foot-list{margin-top:16px;display:grid;gap:12px;}
  .foot-list a{font-size:0.875rem;color:var(--text-2);transition:color .16s var(--ease),padding-left .16s var(--ease);}
  .foot-list a:hover{color:var(--aurora-bright);padding-left:4px;}
  .foot-bottom{
    margin-top:44px;padding:22px 0;
    border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
    font-size:0.8125rem;color:var(--text-3);
  }
  .foot-bottom .mono{color:var(--text-3);}

  .to-top{
    position:fixed;right:20px;bottom:20px;z-index:60;
    width:48px;height:48px;border-radius:999px;display:grid;place-items:center;
    background:rgba(13,28,43,0.82);border:1px solid var(--glass-line);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    color:var(--aurora);cursor:pointer;
    opacity:0;pointer-events:none;transform:translateY(8px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),border-color .16s var(--ease);
  }
  .to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
  .to-top:hover{border-color:rgba(31,209,178,0.5);}

  /* ---------- 移动端抽屉 ---------- */
  @media (max-width:1023px){
    .burger{display:inline-flex;}
    .nav-cta{display:none;}
    .nav-links{
      position:fixed;top:0;right:0;z-index:68;
      height:100dvh;width:min(320px,86vw);
      flex-direction:column;align-items:stretch;gap:4px;
      padding:92px 24px 32px;
      background:rgba(8,19,31,0.96);
      backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
      border-left:1px solid var(--glass-line);
      transform:translateX(102%);
      transition:transform .24s var(--ease);
      overflow-y:auto;
    }
    .nav-links.open{transform:translateX(0);}
    .nav-link{padding:14px 0;font-size:1rem;border-bottom:1px solid rgba(125,180,200,0.08);}
    .nav-link::after{display:none;}
    .nav-link.active{color:var(--aurora);}
    .cat-hero h1{max-width:none;}
  }

  @media (max-width:520px){
    .metrics{grid-template-columns:1fr;}
    .btn{width:100%;}
    .btn-row .btn{width:100%;}
    .foot-bottom{flex-direction:column;align-items:flex-start;}
  }

/* roulang page: category2 */
:root{
  --ink-950:#050B14;
  --ink-900:#08131F;
  --ink-800:#0D1C2B;
  --aurora:#1FD1B2;
  --aurora-bright:#35E8C6;
  --aurora-deep:#0E8F7C;
  --silver:#9DB3C4;
  --amber:#F2A33C;
  --text:#E8F1F6;
  --text-2:#9DB0BE;
  --text-3:#6B8394;
  --line:rgba(125,180,200,0.14);
  --line-soft:rgba(125,180,200,0.08);
  --glass:rgba(255,255,255,0.055);
  --glass-strong:rgba(255,255,255,0.085);
  --r-card:14px;
  --r-btn:10px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,0.04), 0 18px 40px -20px rgba(0,0,0,0.7);
  --t:180ms ease-out;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background-color:var(--ink-950);
  background-image:
    radial-gradient(480px 480px at 88% 6%, rgba(31,209,178,0.13), transparent 70%),
    radial-gradient(420px 420px at 6% 92%, rgba(31,209,178,0.08), transparent 72%),
    linear-gradient(rgba(125,180,200,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,180,200,0.045) 1px, transparent 1px);
  background-size:100% 100%, 100% 100%, 32px 32px, 32px 32px;
  background-repeat:no-repeat, no-repeat, repeat, repeat;
  background-attachment:fixed;
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}

.mono{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;}

.shell{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){ .shell{padding-left:32px;padding-right:32px;} }

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:.9375rem;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--t), box-shadow var(--t), background var(--t), border-color var(--t), color var(--t);
  white-space:nowrap;
}
.btn-primary{
  background:var(--aurora);
  color:#04120F;
  box-shadow:0 0 0 1px rgba(31,209,178,0.45), 0 10px 34px -10px rgba(31,209,178,0.55);
}
.btn-primary:hover{background:var(--aurora-bright);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(53,232,198,0.6), 0 14px 40px -10px rgba(31,209,178,0.7);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(31,209,178,0.4), 0 6px 18px -10px rgba(31,209,178,0.5);}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line);
  color:var(--text);
  backdrop-filter:blur(12px);
}
.btn-ghost:hover{background:var(--glass-strong);border-color:rgba(31,209,178,0.45);color:#fff;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:40px;padding:0 16px;font-size:.875rem;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--aurora);
  outline-offset:2px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  transition:background var(--t), box-shadow var(--t), border-color var(--t), backdrop-filter var(--t);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(8,19,31,0.78);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 32px -24px rgba(0,0,0,0.9);
}
.nav-bar{display:flex;align-items:center;gap:18px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:0 0 36px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--aurora-bright),var(--aurora-deep));
  color:#04120F;font-weight:800;font-size:1.0625rem;line-height:1;
  box-shadow:0 0 0 1px rgba(31,209,178,0.35), 0 8px 22px -12px rgba(31,209,178,0.75);
}
.brand-name{font-size:1.0625rem;font-weight:700;letter-spacing:-0.01em;color:var(--text);}
.brand-name em{font-style:normal;color:var(--aurora);}

.nav-links{display:none;align-items:center;gap:6px;margin-left:auto;}
@media (min-width:1024px){ .nav-links{display:flex;} }
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:40px;padding:0 12px;border-radius:8px;
  color:var(--text-2);font-size:.9375rem;font-weight:500;
  transition:color var(--t), background var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--aurora);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--t);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--aurora);}
.nav-link.active::after{transform:scaleX(1);}

.nav-right{display:flex;align-items:center;gap:10px;margin-left:auto;}
@media (min-width:1024px){ .nav-right{margin-left:0;} }

.burger{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:var(--glass);display:grid;place-items:center;cursor:pointer;
  transition:background var(--t), border-color var(--t);
}
.burger:hover{background:var(--glass-strong);border-color:rgba(31,209,178,0.4);}
.burger span,.burger span::before,.burger span::after{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--text);content:"";
  transition:transform var(--t), opacity var(--t);
}
.burger span{position:relative;}
.burger span::before{position:absolute;top:-6px;left:0;}
.burger span::after{position:absolute;top:6px;left:0;}
@media (min-width:1024px){ .burger{display:none;} }

.nav-cta{display:none;}
@media (min-width:640px){ .nav-cta{display:inline-flex;} }

.nav-backdrop{
  position:fixed;inset:0;background:rgba(3,8,14,0.72);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:opacity var(--t), visibility var(--t);z-index:90;
}
.nav-backdrop.open{opacity:1;visibility:visible;}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);z-index:95;
  background:rgba(8,19,31,0.94);backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 240ms ease-out;
  padding:22px 20px 32px;display:flex;flex-direction:column;gap:8px;
}
.nav-drawer.open{transform:translateX(0);}
.nav-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:var(--glass);cursor:pointer;display:grid;place-items:center;font-size:1.25rem;color:var(--text-2);
  transition:color var(--t), border-color var(--t);
}
.drawer-close:hover{color:var(--text);border-color:rgba(31,209,178,0.45);}
.nav-drawer a.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:10px;
  color:var(--text-2);font-size:.9375rem;border:1px solid transparent;
  transition:color var(--t), background var(--t), border-color var(--t);
}
.nav-drawer a.drawer-link:hover{color:var(--text);background:var(--glass);border-color:var(--line);}
.nav-drawer a.drawer-link.active{color:var(--aurora);background:rgba(31,209,178,0.08);border-color:rgba(31,209,178,0.28);}
.nav-drawer .drawer-cta{margin-top:16px;width:100%;}

/* ---------- 面包屑 ---------- */
.crumbs{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0;padding:0;font-size:.8125rem;color:var(--text-3);}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li + li::before{content:"/";color:rgba(125,180,200,0.35);}
.crumbs a{color:var(--text-3);transition:color var(--t);}
.crumbs a:hover{color:var(--aurora);}
.crumbs .current{color:var(--aurora);}

/* ---------- 顶部条幅 ---------- */
.page-banner{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg, rgba(5,11,20,0.72), rgba(5,11,20,0.94)), url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.page-banner .banner-inner{padding:36px 0 56px;}
@media (min-width:768px){ .page-banner .banner-inner{padding:44px 0 72px;} }
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(12px);
  font-size:.8125rem;color:var(--silver);letter-spacing:.02em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:999px;background:var(--aurora);box-shadow:0 0 10px var(--aurora);}
.h1{
  margin:20px 0 0;max-width:900px;
  font-size:clamp(2rem,4.2vw,3.25rem);font-weight:700;
  letter-spacing:-0.02em;line-height:1.2;color:var(--text);
}
.h1 span{color:var(--aurora);}
.lead{margin:18px 0 0;max-width:760px;font-size:1.0625rem;color:var(--text-2);line-height:1.8;text-align:justify;}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.trust-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;font-size:.8125rem;color:var(--text-3);}
.trust-row .item{display:flex;align-items:center;gap:14px;}
.trust-row .item + .item::before{content:"";width:1px;height:12px;background:var(--line);display:inline-block;}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){ .section{padding:88px 0;} }
.section-alt{background:rgba(8,19,31,0.55);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:760px;}
.h2{
  margin:12px 0 0;font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;line-height:1.3;
  letter-spacing:-0.015em;
}
.sec-desc{margin:14px 0 0;color:var(--text-2);font-size:1rem;line-height:1.8;text-align:justify;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:.75rem;letter-spacing:.14em;color:var(--aurora);
}
.kicker::before{content:"";width:18px;height:1px;background:var(--aurora);opacity:.8;}

.glass{
  background:var(--glass);
  border:1px solid rgba(255,255,255,0.09);
  border-radius:var(--r-card);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}

/* ---------- 核验步骤轴 ---------- */
.axis{position:relative;margin-top:44px;padding-left:30px;}
.axis::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg, rgba(31,209,178,0.75), rgba(31,209,178,0.12));
}
@media (min-width:768px){ .axis{padding-left:44px;} .axis::before{left:9px;} }
.step{position:relative;padding:0 0 34px;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-30px;top:7px;width:15px;height:15px;border-radius:999px;
  background:var(--ink-950);border:2px solid var(--aurora);
  box-shadow:0 0 0 4px rgba(31,209,178,0.10);
}
@media (min-width:768px){ .step::before{left:-44px;} }
.step-no{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:.75rem;letter-spacing:.12em;color:var(--aurora);
}
.step-title{margin:6px 0 0;font-size:1.125rem;font-weight:600;color:var(--text);}
.step-text{margin:10px 0 0;color:var(--text-2);font-size:.9375rem;line-height:1.8;text-align:justify;max-width:820px;}
.step-tag{
  display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  padding:4px 12px;border-radius:999px;border:1px solid var(--line);
  background:rgba(31,209,178,0.06);font-size:.75rem;color:var(--silver);
}

/* ---------- 数据带 ---------- */
.metrics{
  display:grid;grid-template-columns:1fr;gap:0;
  margin-top:8px;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(14px);
  overflow:hidden;
}
@media (min-width:768px){ .metrics{grid-template-columns:repeat(3,1fr);} }
.metric{padding:26px 22px;border-top:1px solid var(--line-soft);}
.metric:first-child{border-top:none;}
@media (min-width:768px){
  .metric{border-top:none;border-left:1px solid var(--line-soft);}
  .metric:first-child{border-left:none;}
}
.metric-num{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.75rem,2.5vw,2.5rem);line-height:1.1;color:var(--aurora);font-weight:600;
}
.metric-num small{font-size:.8125rem;color:var(--text-3);margin-left:6px;font-weight:400;}
.metric-label{margin-top:8px;color:var(--silver);font-size:.875rem;}
.metric-bar{height:2px;border-radius:2px;background:rgba(125,180,200,0.16);margin-top:14px;overflow:hidden;}
.metric-bar i{display:block;height:100%;background:var(--aurora);border-radius:2px;}

/* ---------- 风险信号列表 ---------- */
.risk-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px;}
@media (min-width:768px){ .risk-grid{grid-template-columns:repeat(2,1fr);} }
.risk-item{
  display:flex;gap:14px;padding:18px 20px;border-radius:var(--r-card);
  border:1px solid var(--line);background:rgba(13,28,43,0.5);
  transition:border-color var(--t), transform var(--t), background var(--t);
}
.risk-item:hover{border-color:rgba(242,163,60,0.4);transform:translateY(-2px);background:rgba(13,28,43,0.75);}
.risk-ico{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:rgba(242,163,60,0.14);color:var(--amber);font-size:.8125rem;font-weight:700;
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
}
.risk-item h3{margin:0;font-size:1rem;font-weight:600;color:var(--text);}
.risk-item p{margin:6px 0 0;font-size:.875rem;color:var(--text-2);line-height:1.7;}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;margin-top:36px;}
@media (min-width:1024px){ .split{grid-template-columns:.95fr 1.05fr;gap:48px;} }
.figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid rgba(255,255,255,0.09);box-shadow:var(--shadow-card);
}
.figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(5,11,20,0.06), rgba(5,11,20,0.55));
}
.float-card{
  position:absolute;right:14px;bottom:14px;z-index:2;
  padding:14px 16px;border-radius:12px;
  background:rgba(8,19,31,0.78);border:1px solid rgba(255,255,255,0.12);
  backdrop-filter:blur(14px);min-width:170px;
}
@media (min-width:768px){ .float-card{right:-18px;bottom:-18px;} }
.float-card .n{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:1.375rem;color:var(--aurora);font-variant-numeric:tabular-nums;line-height:1.2;
}
.float-card .t{font-size:.8125rem;color:var(--silver);margin-top:2px;}

.checklist{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:12px;}
.checklist li{display:flex;gap:12px;font-size:.9375rem;color:var(--text-2);line-height:1.75;}
.checklist li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;border-radius:2px;
  background:var(--aurora);box-shadow:0 0 10px rgba(31,209,178,0.6);
}

/* ---------- FAQ ---------- */
.faq-list{margin-top:36px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  min-height:56px;padding:14px 0;background:none;border:0;cursor:pointer;text-align:left;
}
.faq-q .sq{flex:0 0 8px;width:8px;height:8px;border-radius:2px;background:var(--aurora);}
.faq-q .txt{flex:1;font-size:1rem;font-weight:600;color:var(--text);transition:color var(--t);}
.faq-q:hover .txt{color:var(--aurora);}
.faq-q .plus{
  flex:0 0 22px;width:22px;height:22px;position:relative;transition:transform var(--t);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--silver);border-radius:2px;
  transition:background var(--t);
}
.faq-q .plus::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-q .plus::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-item.open .faq-q .plus::before,.faq-item.open .faq-q .plus::after{background:var(--aurora);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease-out;}
.faq-a .inner{padding:0 0 20px 22px;color:var(--text-2);font-size:.9375rem;line-height:1.8;max-width:860px;text-align:justify;}

/* ---------- CTA + 表单 ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  border-radius:var(--r-card);border:1px solid rgba(31,209,178,0.28);
  background:
    radial-gradient(420px 320px at 92% 0%, rgba(31,209,178,0.16), transparent 68%),
    rgba(13,28,43,0.72);
  backdrop-filter:blur(16px);
  padding:32px 22px;
  box-shadow:var(--shadow-card);
}
@media (min-width:1024px){ .cta-panel{padding:48px 44px;} }
.form-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:26px;}
@media (min-width:768px){ .form-grid{grid-template-columns:repeat(2,1fr);} .form-grid .full{grid-column:1 / -1;} }
.field label{display:block;font-size:.8125rem;color:var(--silver);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;min-height:46px;padding:12px 14px;border-radius:var(--r-btn);
  background:rgba(5,11,20,0.6);border:1px solid var(--line);color:var(--text);
  transition:border-color var(--t), box-shadow var(--t), background var(--t);
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--aurora);
  box-shadow:0 0 0 3px rgba(31,209,178,0.18);
  background:rgba(5,11,20,0.85);
}
.field.error input,.field.error textarea{border-color:var(--amber);box-shadow:0 0 0 3px rgba(242,163,60,0.16);}
.err-msg{display:none;margin-top:6px;font-size:.8125rem;color:var(--amber);}
.field.error .err-msg{display:flex;align-items:center;gap:6px;}
.err-msg::before{content:"!";display:grid;place-items:center;width:14px;height:14px;border-radius:999px;background:rgba(242,163,60,0.2);font-size:.625rem;font-weight:700;}
.form-note{
  display:flex;gap:10px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line-soft);
  font-size:.8125rem;color:var(--text-3);line-height:1.7;
}
.form-note .warn{flex:0 0 auto;color:var(--amber);font-weight:700;}
.form-note a{color:var(--silver);text-decoration:underline;text-underline-offset:3px;}
.form-note a:hover{color:var(--aurora);}
.form-ok{
  display:none;margin-top:22px;padding:16px 18px;border-radius:var(--r-btn);
  border:1px solid rgba(31,209,178,0.35);background:rgba(31,209,178,0.08);
  color:var(--aurora);font-size:.9375rem;
}
.form-ok.show{display:block;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;padding:64px 0 28px;
  background:rgba(5,11,20,0.86);
  border-top:1px solid transparent;
  background-image:linear-gradient(180deg, rgba(31,209,178,0.16), rgba(31,209,178,0)), linear-gradient(rgba(5,11,20,0.92), rgba(5,11,20,0.92));
  background-size:100% 1px, 100% 100%;
  background-repeat:no-repeat, no-repeat;
  position:relative;
}
.foot-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:768px){ .foot-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;} }
.foot-brand p{margin:16px 0 0;font-size:.875rem;color:var(--text-2);line-height:1.8;max-width:340px;}
.foot-contact{margin-top:16px;font-size:.8125rem;color:var(--text-3);}
.foot-contact strong{color:var(--silver);font-weight:500;}
.foot-title{font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:14px;}
.foot-list{display:grid;gap:10px;}
.foot-list a{font-size:.875rem;color:var(--text-2);transition:color var(--t);position:relative;}
.foot-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;background:var(--aurora);
  transform:scaleX(0);transform-origin:left center;transition:transform var(--t);
}
.foot-list a:hover{color:var(--aurora);}
.foot-list a:hover::after{transform:scaleX(1);}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:.8125rem;color:var(--text-3);
}
.foot-bottom .mono{font-size:.75rem;color:var(--text-3);}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:48px;height:48px;border-radius:999px;
  display:grid;place-items:center;cursor:pointer;
  background:rgba(13,28,43,0.82);border:1px solid var(--line);
  color:var(--silver);backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t), visibility var(--t), transform var(--t), border-color var(--t), color var(--t);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(31,209,178,0.5);color:var(--aurora);}

.body-lock{overflow:hidden;}