/* roulang page: index */
:root{
  --night:#08070F;
  --deep:#0E0C1C;
  --panel:#16142A;
  --panel-2:#1E1B33;
  --star:#6C5CE7;
  --star-light:#8B7CF6;
  --star-dark:#4B3FC4;
  --aurora:#35D0C0;
  --sand:#F0C36B;
  --ink:#EDEAF7;
  --ink-sub:#A9A5C0;
  --ink-weak:#6F6B87;
  --paper:#F7F6FC;
  --paper-ink:#14121F;
  --paper-sub:#5A5670;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --paper-line:#E7E5F2;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-panel:12px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--deep);
  color:var(--ink);
  font-family:'PingFang SC','HarmonyOS Sans','Microsoft YaHei','Helvetica Neue',sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select{font:inherit;color:inherit;}
input{background:none;}
::selection{background:rgba(108,92,231,.42);color:#fff;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media(min-width:768px){.wrap{padding:0 40px;}}
@media(min-width:1280px){.wrap{padding:0 64px;}}
.serif{font-family:'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',serif;}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.eyebrow{
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--aurora);font-weight:600;
}
.hairline{height:1px;background:var(--line);border:0;}
.section{padding:88px 0;}
@media(max-width:767px){.section{padding:56px 0;}}
.sec-title{font-size:34px;line-height:1.25;font-weight:600;letter-spacing:-.01em;}
@media(max-width:767px){.sec-title{font-size:26px;}}
.sec-sub{color:var(--ink-sub);font-size:16px;line-height:1.8;max-width:640px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--star);color:#fff;}
.btn-primary:hover{background:var(--star-light);}
.btn-primary:active{background:var(--star-dark);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{border-color:var(--star-light);color:#fff;}
.btn-ghost:active{border-color:var(--star-dark);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;}
.btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--star-light);outline-offset:3px;
}
.link-underline{
  position:relative;color:var(--aurora);font-weight:600;
}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;
  background:var(--aurora);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.link-underline:hover::after{transform:scaleX(1);}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  font-size:12px;line-height:1.6;font-weight:600;
  background:rgba(108,92,231,.15);color:var(--star-light);
  border:1px solid rgba(108,92,231,.28);
}
.badge-sand{background:rgba(240,195,107,.14);color:var(--sand);border-color:rgba(240,195,107,.3);}
.badge-aurora{background:rgba(53,208,192,.12);color:var(--aurora);border-color:rgba(53,208,192,.28);}
.badge-paper{background:#EDEAFB;color:#4B3FC4;border-color:#DCD6F7;}

/* 倒计时条 */
.topbar{
  background:var(--night);
  border-bottom:1px solid var(--line);
  height:40px;
  display:flex;align-items:center;
  position:sticky;top:0;z-index:60;
}
.pulse-dot{
  width:8px;height:8px;border-radius:999px;background:var(--aurora);
  box-shadow:0 0 0 0 rgba(53,208,192,.6);
  animation:pulse 2s infinite;
  flex:none;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,208,192,.55);}
  70%{box-shadow:0 0 0 9px rgba(53,208,192,0);}
  100%{box-shadow:0 0 0 0 rgba(53,208,192,0);}
}
.topbar-count{color:var(--sand);font-weight:700;letter-spacing:.02em;}

/* 导航 */
.site-header{
  position:sticky;top:40px;z-index:50;
  background:rgba(14,12,28,.94);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-row{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--star),var(--star-dark));
  display:grid;place-items:center;position:relative;flex:none;
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border-radius:999px;
  border:1.5px solid rgba(255,255,255,.72);
  border-right-color:transparent;border-bottom-color:transparent;
  transform:rotate(28deg);
}
.logo-mark::before{
  content:"";width:4px;height:4px;border-radius:999px;background:var(--sand);
  position:absolute;top:9px;right:8px;
}
.logo-text{font-size:16px;font-weight:700;letter-spacing:.01em;line-height:1.2;}
.logo-sub{font-size:11px;color:var(--ink-weak);letter-spacing:.08em;text-transform:uppercase;}
.nav-links{display:none;align-items:center;gap:6px;}
@media(min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;color:var(--ink-sub);
  border-radius:8px;transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-link:hover{color:var(--ink);background:rgba(255,255,255,.04);}
.nav-link.active{color:#fff;}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--star);border-radius:2px;
}
.mega{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;
  font-size:15px;color:var(--ink-sub);cursor:pointer;background:none;border:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.mega:hover .mega-trigger,.mega:focus-within .mega-trigger{color:#fff;border-color:var(--line-strong);}
.mega-trigger svg{transition:transform .24s var(--ease);}
.mega:hover .mega-trigger svg,.mega:focus-within .mega-trigger svg{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);
  width:760px;max-width:calc(100vw - 48px);
  background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--r-panel);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  padding:24px;display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col-title{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-weak);margin-bottom:12px;}
.mega-item{
  display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--ink-sub);
  transition:background-color .2s var(--ease),color .2s var(--ease),padding-left .2s var(--ease);
}
.mega-item:hover{background:rgba(108,92,231,.14);color:#fff;padding-left:14px;}
.mega-card{
  display:block;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.mega-card:hover{border-color:var(--star-light);transform:translateY(-2px);}
.mega-card img{width:100%;height:78px;object-fit:cover;}
.mega-card span{display:block;padding:10px 12px;font-size:13px;font-weight:600;}
.nav-cta{display:none;}
@media(min-width:1024px){.nav-cta{display:inline-flex;height:40px;padding:0 18px;font-size:14px;}}
.menu-btn{
  display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;
  border:1px solid var(--line-strong);border-radius:10px;background:none;cursor:pointer;
}
@media(min-width:1024px){.menu-btn{display:none;}}
.drawer{
  display:none;background:var(--deep);border-bottom:1px solid var(--line);
}
.drawer.open{display:block;}
.drawer a{
  display:flex;align-items:center;height:52px;padding:0 24px;font-size:15px;
  border-bottom:1px solid var(--line);color:var(--ink-sub);
}
.drawer a:hover,.drawer a.active{color:#fff;background:rgba(108,92,231,.12);}
.drawer .drawer-cta{margin:16px 24px 24px;height:46px;justify-content:center;border:0;border-radius:var(--r-btn);}

/* Hero */
.hero{
  position:relative;
  padding:72px 0 96px;
  background:
    radial-gradient(900px 460px at 12% -8%, rgba(108,92,231,.30), transparent 68%),
    radial-gradient(680px 420px at 96% 8%, rgba(53,208,192,.12), transparent 70%),
    var(--deep);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:center;}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;}}
.hero h1{
  font-size:38px;line-height:1.18;font-weight:600;letter-spacing:-.02em;margin:18px 0 20px;
}
@media(min-width:640px){.hero h1{font-size:48px;}}
@media(min-width:1280px){.hero h1{font-size:62px;}}
.hero-lead{color:var(--ink-sub);font-size:17px;line-height:1.85;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:22px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line);}
.hero-stat{padding-left:14px;border-left:2px solid var(--aurora);}
.hero-stat b{display:block;font-size:14px;font-weight:600;color:var(--ink);}
.hero-stat span{font-size:13px;color:var(--ink-weak);}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;height:400px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--line-strong);
}
@media(min-width:1024px){.hero-visual img{height:480px;}}
.hero-float{
  position:absolute;left:18px;bottom:-22px;right:18px;
  background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--r-panel);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  padding:16px 18px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
}
.hero-float div{border-left:2px solid rgba(53,208,192,.5);padding-left:10px;}
.hero-float b{display:block;font-size:13px;font-weight:600;}
.hero-float span{font-size:12px;color:var(--ink-weak);}

/* 卖点条目流 */
.point-row{
  display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:start;
  padding:30px 0;border-top:1px solid var(--line);
}
.point-row:last-child{border-bottom:1px solid var(--line);}
.point-num{
  font-size:40px;line-height:1;font-weight:600;color:transparent;
  -webkit-text-stroke:1px var(--star-light);
  font-variant-numeric:tabular-nums;
}
@media(max-width:639px){.point-num{font-size:28px;}}
.point-row h3{font-size:21px;font-weight:600;margin:0 0 8px;}
.point-row p{color:var(--ink-sub);font-size:15px;line-height:1.8;margin:0;max-width:760px;}

/* 图墙 */
.wall{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-rows:140px;gap:14px;}
@media(min-width:768px){.wall{grid-template-columns:repeat(6,1fr);grid-auto-rows:150px;gap:16px;}}
.wall-item{position:relative;overflow:hidden;border-radius:var(--r-img);border:1px solid var(--line);background:var(--panel);}
.wall-item img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.wall-item:hover img{transform:scale(1.03);}
.wall-item .tag{
  position:absolute;left:12px;bottom:12px;
  padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(8,7,15,.72);border:1px solid var(--line-strong);color:var(--ink);
}
.wall-item .hover-cap{
  position:absolute;inset:auto 12px 12px 12px;padding:12px 14px;
  background:rgba(8,7,15,.86);border:1px solid var(--line-strong);border-radius:10px;
  font-size:13px;line-height:1.6;color:var(--ink-sub);
  opacity:0;transform:translateY(8px);
  transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.wall-item:hover .hover-cap{opacity:1;transform:translateY(0);}
.w1{grid-column:span 2;grid-row:span 2;}
@media(min-width:768px){
  .w1{grid-column:span 3;grid-row:span 2;}
  .w2{grid-column:span 3;}
  .w3{grid-column:span 2;}
  .w4{grid-column:span 1;}
  .w5{grid-column:span 2;grid-row:span 2;}
  .w6{grid-column:span 2;}
  .w7{grid-column:span 1;}
}

/* 参数面板 */
.spec-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;
}
.spec-grid{display:grid;grid-template-columns:1fr;gap:0;}
@media(min-width:768px){.spec-grid{grid-template-columns:repeat(2,1fr);}}
.spec-item{padding:18px 0;border-top:1px solid var(--line);}
.spec-item:nth-child(1),.spec-item:nth-child(2){border-top:0;}
@media(max-width:767px){.spec-item:nth-child(2){border-top:1px solid var(--line);}}
.spec-item dt{font-size:13px;color:var(--ink-weak);margin-bottom:6px;}
.spec-item dd{margin:0;font-size:17px;font-weight:600;}
.spec-item dd em{font-style:normal;color:var(--aurora);font-size:14px;font-weight:600;margin-left:8px;}

/* 最新信息 */
.feed-lead{
  display:block;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.feed-lead:hover{border-color:var(--star-light);transform:translateY(-2px);}
.feed-lead img{width:100%;height:230px;object-fit:cover;}
.feed-lead .body{padding:22px;}
.feed-lead h3{font-size:21px;font-weight:600;line-height:1.45;margin:12px 0 10px;}
.feed-lead p{color:var(--ink-sub);font-size:14px;line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feed-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--ink-weak);margin-top:16px;}
.feed-item{
  display:block;padding:18px 0;border-top:1px solid var(--line);
  transition:padding-left .24s var(--ease);
}
.feed-item:hover{padding-left:8px;}
.feed-item h4{font-size:16px;font-weight:600;line-height:1.55;margin:0 0 6px;transition:color .2s var(--ease);}
.feed-item:hover h4{color:var(--star-light);}
.feed-item p{color:var(--ink-sub);font-size:13.5px;line-height:1.7;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feed-empty{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:40px 24px;text-align:center;color:var(--ink-sub);font-size:15px;
}

/* FAQ 亮纸区 */
.paper-band{background:var(--paper);color:var(--paper-ink);border-top:1px solid var(--paper-line);border-bottom:1px solid var(--paper-line);}
.paper-band .sec-sub{color:var(--paper-sub);}
.paper-band .eyebrow{color:var(--star-dark);}
.faq-grid{display:grid;grid-template-columns:1fr;gap:0 32px;}
@media(min-width:1024px){.faq-grid{grid-template-columns:1fr 1fr;}}
.faq-item{
  border-bottom:1px solid var(--paper-line);
  padding:4px 0;
}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 40px 18px 0;font-size:16px;font-weight:600;line-height:1.6;
  color:var(--paper-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:8px;top:26px;
  width:9px;height:9px;border-right:2px solid var(--star-dark);border-bottom:2px solid var(--star-dark);
  transform:rotate(45deg);transition:transform .24s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item[open] summary{color:var(--star-dark);}
.faq-item[open] summary::before{
  content:"";position:absolute;left:-14px;top:20px;bottom:20px;width:3px;
  background:var(--star);border-radius:2px;
}
@media(max-width:1023px){.faq-item[open] summary::before{left:-10px;}}
.faq-answer{padding:0 40px 20px 0;font-size:15px;line-height:1.85;color:var(--paper-sub);}
.faq-answer p{margin:0;}

/* CTA */
.cta-band{
  background:linear-gradient(135deg,rgba(108,92,231,.26),rgba(53,208,192,.08));
  border:1px solid var(--line-strong);border-radius:var(--r-card);
  padding:36px 28px;
}
@media(min-width:1024px){.cta-band{padding:52px 48px;}}
.cta-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:start;}
@media(min-width:1024px){.cta-grid{grid-template-columns:.95fr 1.05fr;gap:56px;}}
.cta-list{list-style:none;padding:0;margin:24px 0 0;}
.cta-list li{display:flex;gap:10px;padding:9px 0;color:var(--ink-sub);font-size:15px;}
.cta-list li::before{content:"";flex:none;width:6px;height:6px;border-radius:999px;background:var(--aurora);margin-top:11px;}
.form-card{background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--r-card);padding:26px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--ink-sub);margin-bottom:8px;}
.field input[type="text"],.field input[type="tel"],.field input[type="email"]{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);color:var(--ink);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.field input::placeholder{color:var(--ink-weak);}
.field input:focus{border-color:var(--star-light);background:rgba(108,92,231,.08);outline:none;}
.field.error input{border-color:var(--sand);}
.field .err{display:none;font-size:13px;color:var(--sand);margin-top:6px;}
.field.error .err{display:block;}
.code-row{display:flex;gap:10px;}
.code-row input{flex:1;}
.code-btn{
  flex:none;height:46px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid var(--line-strong);background:transparent;color:var(--ink-sub);
  font-size:14px;cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease);
}
.code-btn:hover{border-color:var(--star-light);color:#fff;}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-sub);line-height:1.7;}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--star);flex:none;}
.form-note{font-size:12.5px;color:var(--ink-weak);margin-top:14px;line-height:1.7;}

/* 页脚 */
.site-footer{background:var(--night);border-top:1px solid var(--line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
@media(min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}}
.footer-title{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-weak);margin-bottom:16px;}
.footer-links a{display:block;font-size:14px;color:var(--ink-sub);padding:6px 0;transition:color .2s var(--ease);}
.footer-links a:hover{color:var(--aurora);}
.footer-copy{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--ink-weak);
}
.footer-brand p{color:var(--ink-sub);font-size:14px;line-height:1.8;margin:14px 0 0;max-width:340px;}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--deep);}
::-webkit-scrollbar-thumb{background:#2A2646;border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:var(--star-dark);}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.in{opacity:1;transform:none;}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink:#08070F;
  --bg:#0E0C1C;
  --panel:#16142A;
  --panel-2:#1E1B33;
  --brand:#6C5CE7;
  --brand-light:#8B7CF6;
  --brand-dark:#4B3FC4;
  --cyan:#35D0C0;
  --gold:#F0C36B;
  --text:#EDEAF7;
  --sub:#A9A5C0;
  --weak:#6F6B87;
  --paper:#F7F6FC;
  --paper-text:#14121F;
  --paper-sub:#5A5670;
  --line:rgba(255,255,255,.08);
  --line-paper:#E7E5F2;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-panel:12px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.25;font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif}
:focus-visible{outline:2px solid var(--brand-light);outline-offset:2px;border-radius:6px}
::selection{background:rgba(108,92,231,.35);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0E0C1C}
::-webkit-scrollbar-thumb{background:#2A2743;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#3B3760}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
@media (min-width:768px){.wrap{padding:0 40px}}
@media (min-width:1280px){.wrap{padding:0 64px}}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(14,12,28,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;height:72px}
.logo{display:flex;align-items:center;gap:11px;flex-shrink:0}
.logo-mark{display:inline-flex;width:32px;height:32px;flex-shrink:0}
.logo-text{
  font-family:"Noto Serif SC","Songti SC",Georgia,serif;
  font-size:15px;font-weight:600;letter-spacing:.01em;color:var(--text);white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 13px;font-size:14.5px;color:var(--sub);border-radius:8px;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.mega{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;padding:9px 13px;font-size:14.5px;
  color:var(--sub);border-radius:8px;border:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.mega-trigger:hover,.mega.open .mega-trigger{color:var(--text);border-color:rgba(139,124,246,.5);background:rgba(108,92,231,.1)}
.mega-trigger svg{transition:transform .24s var(--ease)}
.mega.open .mega-trigger svg{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 16px);width:860px;
  display:grid;grid-template-columns:1.05fr .85fr .9fr;gap:28px;
  padding:26px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-panel);box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel,.mega.open .mega-panel{opacity:1;visibility:visible;transform:none}
.mega-col-title{
  font-size:12px;letter-spacing:.08em;color:var(--weak);text-transform:uppercase;
  margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line);
}
.mega-item{
  display:block;font-size:14px;color:var(--sub);padding:7px 0 7px 0;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.mega-item:hover{color:var(--brand-light);padding-left:6px}
.mega-card{
  display:block;border:1px solid var(--line);border-radius:var(--r-panel);
  overflow:hidden;background:var(--panel-2);
  transition:transform .26s var(--ease),border-color .26s var(--ease);
}
.mega-card:hover{transform:translateY(-2px);border-color:rgba(139,124,246,.55)}
.mega-card img{width:100%;height:88px;object-fit:cover;border-radius:0;transition:transform .4s var(--ease)}
.mega-card:hover img{transform:scale(1.03)}
.mega-card span{display:block;padding:10px 14px;font-size:13.5px;color:var(--text)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;width:42px;height:42px;
  border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-light);background:rgba(108,92,231,.12)}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-light)}
.btn-primary:active{background:var(--brand-dark);transform:translateY(1px)}
.btn-ghost{border:1px solid rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand-light);color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.08em;background:rgba(108,92,231,.16);color:var(--brand-light);
}
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:84px 0}}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;flex-wrap:wrap;margin-bottom:30px}
.sec-title{font-size:30px;letter-spacing:-.01em}
.sec-desc{font-size:15px;color:var(--sub);max-width:620px;margin-top:8px}
@media (max-width:768px){.sec-title{font-size:24px}}

/* ============ 面包屑 ============ */
.crumb-band{padding:26px 0 0}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:9px;font-size:13px;color:var(--weak)}
.crumb a{color:var(--sub);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{color:#3E3A5C}
.crumb .cur{color:var(--text);opacity:.88;max-width:440px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.article-head{padding:30px 0 38px;border-bottom:1px solid var(--line)}
.article-title{
  font-size:42px;line-height:1.18;letter-spacing:-.02em;
  margin:16px 0 18px;max-width:920px;
}
@media (max-width:1024px){.article-title{font-size:34px}}
@media (max-width:768px){.article-title{font-size:27px}}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:11px;font-size:13.5px;color:var(--sub)}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);display:inline-block}
.quickbar{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  margin-top:30px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-panel);overflow:hidden;
}
.quick-item{padding:20px 24px;border-left:1px solid var(--line)}
.quick-item:first-child{border-left:0}
.quick-num{font-size:12px;letter-spacing:.08em;color:var(--cyan);display:block;margin-bottom:8px}
.quick-item h3{font-size:16px;margin-bottom:6px;color:var(--text)}
.quick-item p{font-size:13.5px;color:var(--sub);line-height:1.75;margin:0}
@media (max-width:860px){
  .quickbar{grid-template-columns:1fr}
  .quick-item{border-left:0;border-top:1px solid var(--line)}
  .quick-item:first-child{border-top:0}
}

/* ============ 正文区 ============ */
.article-wrap{
  max-width:1180px;margin:0 auto;display:grid;
  grid-template-columns:minmax(0,1fr) 250px;gap:44px;align-items:start;
}
.paper{
  background:var(--paper);color:var(--paper-text);
  border:1px solid var(--line-paper);border-radius:var(--r-card);
}
.article-body{padding:46px 48px;font-size:17px;line-height:1.9}
@media (max-width:768px){.article-body{padding:28px 20px;font-size:16px}}
.article-body p{margin:0 0 22px}
.article-body > p:first-child{font-size:18px;color:#2B2742}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;padding-left:14px;
  margin:44px 0 16px;color:#14121F;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;bottom:.34em;width:3px;
  background:var(--brand);border-radius:2px;
}
.article-body h3{font-size:20px;margin:32px 0 14px;color:#1B1830}
.article-body h4{font-size:17px;margin:24px 0 10px;color:#1B1830}
.article-body a{color:#4B3FC4;border-bottom:1px solid rgba(75,63,196,.35);transition:color .2s var(--ease),border-color .2s var(--ease)}
.article-body a:hover{color:var(--brand);border-color:var(--cyan)}
.article-body strong{color:#14121F;font-weight:600}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:24px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:8px 0}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--brand);
  background:#F1EEFC;border-radius:0 10px 10px 0;color:#3B3757;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:26px 0}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--paper-sub);text-align:center;margin-top:10px}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  font-size:15px;margin:26px 0;
}
.article-body th,.article-body td{border:1px solid #E2DFF0;padding:10px 14px;text-align:left;white-space:nowrap}
.article-body th{background:#F1EEFC;font-weight:600}
.article-body pre{
  background:#14121F;color:#EDEAF7;padding:18px 20px;border-radius:var(--r-btn);
  overflow-x:auto;font-size:14px;line-height:1.75;margin:26px 0;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;background:#EDEAF7;padding:2px 6px;border-radius:6px;
}
.article-body pre code{background:none;padding:0;color:inherit;font-size:14px}
.article-body hr{border:0;border-top:1px solid #E2DFF0;margin:34px 0}
.empty-state{padding:26px 0}
.empty-state h2{font-size:24px;padding-left:0;margin:0 0 12px}
.empty-state h2::before{display:none}
.empty-state p{color:var(--paper-sub);font-size:16px}
.empty-state .btn-primary{color:#fff;margin-top:8px}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px}
@media (max-width:1023px){.article-side{display:none}}
.side-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:20px;margin-bottom:16px;
}
.side-title{
  font-size:12px;letter-spacing:.08em;color:var(--weak);text-transform:uppercase;
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line);
}
.side-link{
  display:block;font-size:14px;color:var(--sub);padding:7px 0;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.side-link:hover{color:var(--cyan);padding-left:5px}
.side-note li{font-size:13.5px;color:var(--sub);padding:6px 0 6px 14px;position:relative;line-height:1.7}
.side-note li::before{content:"";position:absolute;left:0;top:14px;width:5px;height:5px;border-radius:50%;background:var(--brand-light)}
.side-note .btn{width:100%;margin-top:14px}

/* ============ 上下篇 / 相关推荐 ============ */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:40px}
@media (max-width:680px){.pn-grid{grid-template-columns:1fr}}
.pn-card{
  display:block;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-card);padding:18px 20px;
  transition:transform .26s var(--ease),border-color .26s var(--ease);
}
.pn-card:hover{transform:translateY(-2px);border-color:rgba(139,124,246,.55)}
.pn-label{display:block;font-size:12px;letter-spacing:.08em;color:var(--weak);margin-bottom:7px}
.pn-title{font-size:15.5px;color:var(--text);transition:color .2s var(--ease)}
.pn-card:hover .pn-title{color:var(--brand-light)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
@media (max-width:900px){.rel-grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.rel-grid{grid-template-columns:1fr}}
.rel-card{
  display:block;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .28s var(--ease),border-color .28s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);border-color:rgba(139,124,246,.55)}
.rel-card img{width:100%;height:150px;object-fit:cover;border-radius:0;transition:transform .4s var(--ease)}
.rel-card:hover img{transform:scale(1.03)}
.rel-body{padding:18px 20px 20px}
.rel-title{font-size:16.5px;line-height:1.55;margin-bottom:10px;color:var(--text);font-weight:600}
.rel-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--weak);flex-wrap:wrap}
.rel-meta .tag{color:var(--brand-light);background:rgba(108,92,231,.16);border-radius:999px;padding:2px 10px}
.cta-band{
  margin-top:52px;padding:42px 44px;border-radius:var(--r-card);
  background:linear-gradient(135deg,rgba(108,92,231,.18),rgba(53,208,192,.08));
  border:1px solid rgba(139,124,246,.25);
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{font-size:14.5px;color:var(--sub);max-width:560px;margin:0}
@media (max-width:768px){.cta-band{padding:30px 22px}.cta-band h2{font-size:22px}}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);border-top:1px solid var(--line);padding:60px 0 26px;margin-top:16px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer-brand p{font-size:14px;color:var(--sub);line-height:1.8;margin:14px 0 0;max-width:430px}
.footer-title{font-size:12px;letter-spacing:.08em;color:var(--weak);text-transform:uppercase;margin-bottom:12px}
.footer-links a{display:block;font-size:14px;color:var(--sub);padding:6px 0;transition:color .2s var(--ease)}
.footer-links a:hover{color:var(--cyan)}
.footer-copy{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--weak);
}

/* ============ 移动端导航 ============ */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed;top:72px;left:0;right:0;bottom:0;z-index:55;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:8px 20px 40px;background:var(--bg);overflow-y:auto;
    transform:translateX(100%);visibility:hidden;
    transition:transform .28s var(--ease),visibility .28s var(--ease);
  }
  .nav-links.open{transform:none;visibility:visible}
  .nav-link{
    height:52px;padding:0 4px;border-bottom:1px solid var(--line);
    border-radius:0;font-size:15px;justify-content:flex-start;
  }
  .nav-link.active{color:var(--brand-light)}
  .nav-link.active::after{display:none}
  .mega{width:100%}
  .mega-trigger{
    width:100%;height:52px;justify-content:space-between;padding:0 4px;
    border-radius:0;border:0;border-bottom:1px solid var(--line);font-size:15px;
  }
  .mega-panel{
    position:static;width:auto;display:none;grid-template-columns:1fr;gap:20px;
    padding:16px 4px 20px;background:transparent;border:0;box-shadow:none;
    opacity:1;visibility:visible;transform:none;
  }
  .mega.open .mega-panel{display:grid}
  .mega-card img{height:110px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important}
  .rel-card:hover,.pn-card:hover,.mega-card:hover{transform:none}
  .rel-card:hover img,.mega-card:hover img{transform:none}
}

/* roulang page: category1 */
:root{
  --bg:#0E0C1C;
  --bg-deep:#08070F;
  --panel:#16142A;
  --panel-2:#1E1B33;
  --brand:#6C5CE7;
  --brand-l:#8B7CF6;
  --brand-d:#4B3FC4;
  --cyan:#35D0C0;
  --gold:#F0C36B;
  --text:#EDEAF7;
  --sub:#A9A5C0;
  --weak:#6F6B87;
  --paper:#F7F6FC;
  --paper-text:#14121F;
  --paper-sub:#5A5670;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-weight:600;color:var(--text)}
h1{font-size:56px;line-height:1.15;letter-spacing:-.02em;margin:22px 0 0}
h2{font-size:38px;line-height:1.25;letter-spacing:-.01em;margin:14px 0 0}
h3{font-size:21px;line-height:1.45;margin:0 0 10px}
p{margin:0}
:focus-visible{outline:2px solid var(--brand-l);outline-offset:3px;border-radius:6px}

.wrap{max-width:1240px;margin:0 auto;padding:0 64px}
.section{padding:104px 0}
.section-tight{padding:76px 0}
.hairline{height:1px;background:var(--line);border:0;margin:0}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--bg);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--panel);border:1px solid var(--line-strong);border-radius:10px}
.logo-text{font-family:"Noto Serif SC",serif;font-size:16px;font-weight:600;letter-spacing:.01em;white-space:nowrap;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;position:relative}
.nav-link{position:relative;display:inline-block;padding:10px 14px;font-size:14.5px;color:var(--sub);border-radius:8px;white-space:nowrap;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover{color:var(--text);background:rgba(108,92,231,.12)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-cta{margin-left:10px;flex:none}

/* mega */
.mega{position:relative}
.mega-trigger{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;font-size:14.5px;color:var(--sub);background:transparent;border:1px solid transparent;border-radius:8px;transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)}
.mega-trigger:hover,.mega.is-open .mega-trigger{color:var(--text);border-color:var(--line-strong);background:rgba(108,92,231,.1)}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;
  width:min(860px,calc(100vw - 48px));
  display:grid;grid-template-columns:1.05fr 1fr 1fr;gap:24px;
  padding:24px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel,.mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col-title{font-size:12px;letter-spacing:.08em;color:var(--weak);margin-bottom:10px}
.mega-item{display:block;padding:8px 10px;margin:0 -10px;border-radius:8px;font-size:14px;color:var(--sub);transition:color .18s var(--ease),background .18s var(--ease)}
.mega-item:hover{color:var(--brand-l);background:rgba(108,92,231,.12)}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;background:var(--panel-2);transition:border-color .2s var(--ease),transform .2s var(--ease)}
.mega-card:hover{border-color:rgba(139,124,246,.55);transform:translateY(-2px)}
.mega-card img{width:100%;height:84px;object-fit:cover}
.mega-card span{display:block;padding:10px 12px;font-size:13.5px;color:var(--text)}

/* ---------- buttons / tags ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:500;border:1px solid transparent;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-l)}
.btn-primary:active{background:var(--brand-d)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand-l);color:var(--brand-l)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled]{opacity:.45;pointer-events:none}
.tag{display:inline-block;padding:5px 14px;border-radius:999px;font-size:12px;letter-spacing:.08em;color:var(--brand-l);background:rgba(108,92,231,.15);border:1px solid rgba(108,92,231,.3)}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--cyan)}
.textlink{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14.5px;color:var(--brand-l);position:relative;width:max-content}
.textlink::after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:0;background:var(--cyan);transition:width .24s var(--ease)}
.textlink:hover::after{width:100%}

/* ---------- hero ---------- */
.hero{position:relative;padding:96px 0 92px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(680px 420px at 82% -10%,rgba(108,92,231,.2),transparent 68%);pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--sub);max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-facts{display:flex;flex-wrap:wrap;margin-top:36px}
.hero-facts span{display:inline-flex;align-items:center;padding:2px 18px;font-size:13.5px;color:var(--sub);border-left:1px solid rgba(53,208,192,.5)}
.hero-facts span:first-child{padding-left:0;border-left:0}
.hero-facts b{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums;margin:0 4px}
.hero-visual{margin:0}
.hero-visual img{width:100%;height:420px;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}

/* ---------- section head ---------- */
.sec-head{max-width:740px;margin-bottom:48px}
.sec-lead{margin-top:16px;font-size:16.5px;color:var(--sub)}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:72px}
.split img{width:100%;height:340px;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}
.split p{color:var(--sub);font-size:16.5px}
.check-list{display:grid;gap:14px;margin-top:24px}
.check-list li{position:relative;padding-left:24px;font-size:15.5px;line-height:1.75;color:#C9C5DC}
.check-list li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:2px;background:var(--cyan)}

/* ---------- steps ---------- */
.steps{position:relative}
.steps::before{content:"";position:absolute;left:27px;top:20px;bottom:20px;width:1px;background:var(--line-strong)}
.step{display:grid;grid-template-columns:64px 1fr;gap:18px;padding:22px 0}
.step-no{position:relative;z-index:1;width:56px;height:56px;display:grid;place-items:center;border-radius:999px;background:var(--panel);border:1px solid var(--line-strong);color:var(--gold);font-size:15px;font-weight:600;font-variant-numeric:tabular-nums}
.step p{color:var(--sub);font-size:15.5px;line-height:1.75}

/* ---------- cards ---------- */
.stagger{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.stagger > :nth-child(2){margin-top:40px}
.stagger > :nth-child(3){margin-top:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .24s var(--ease),border-color .24s var(--ease)}
.card:hover{transform:translateY(-2px);border-color:rgba(139,124,246,.55)}
.card-img{overflow:hidden}
.card-img img{width:100%;height:200px;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .card-img img{transform:scale(1.03)}
.card-body{padding:22px}
.card-body p{color:var(--sub);font-size:15px;line-height:1.75}

/* ---------- status panel ---------- */
.status-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);padding:32px}
.status-list{display:grid}
.status-list li{display:flex;align-items:center;gap:14px;padding:16px 0;border-top:1px solid var(--line);font-size:15px}
.status-list li:first-child{border-top:0;padding-top:0}
.dot{width:8px;height:8px;border-radius:999px;background:var(--cyan);box-shadow:0 0 0 4px rgba(53,208,192,.14);flex:none}
.status-list strong{font-weight:600;color:var(--text)}
.status-list em{font-style:normal;font-size:13.5px;color:var(--weak);margin-left:10px}
.pill{margin-left:auto;padding:4px 12px;border-radius:999px;font-size:12px;letter-spacing:.06em;color:var(--brand-l);background:rgba(108,92,231,.15);border:1px solid rgba(108,92,231,.28)}
.notice{margin-top:22px;padding-top:22px;border-top:1px solid var(--line);font-size:14.5px;color:var(--sub);line-height:1.8}
.notice time{color:var(--gold);font-variant-numeric:tabular-nums;margin-right:8px}

/* ---------- gallery ---------- */
.gallery{display:grid;gap:16px;grid-template-columns:1.15fr 1fr 1fr;grid-template-rows:190px 190px;grid-template-areas:"a b c" "a d d"}
.gcard{position:relative;margin:0;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.gcard img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.gcard:hover img{transform:scale(1.03)}
.gcard::after{content:"";position:absolute;inset:auto 0 0 0;height:58%;background:linear-gradient(to top,rgba(8,7,15,.78),transparent);pointer-events:none}
.gcard figcaption{position:absolute;left:16px;right:16px;bottom:16px;z-index:1;display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.gbadge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:12px;letter-spacing:.06em;color:var(--gold);background:rgba(8,7,15,.72);border:1px solid rgba(240,195,107,.35)}
.gtext{font-size:13.5px;color:var(--text);background:rgba(8,7,15,.78);padding:6px 12px;border-radius:10px;opacity:0;transform:translateY(6px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
.gcard:hover .gtext{opacity:1;transform:translateY(0)}
.g-a{grid-area:a}.g-b{grid-area:b}.g-c{grid-area:c}.g-d{grid-area:d}

/* ---------- faq paper ---------- */
.paper{background:var(--paper);color:var(--paper-text);border-top:1px solid #E7E5F2;border-bottom:1px solid #E7E5F2}
.paper h2{color:var(--paper-text)}
.paper .eyebrow{color:var(--brand-d)}
.paper .sec-lead{color:var(--paper-sub)}
.faq{max-width:880px;margin:0 auto}
.faq details{border-bottom:1px solid #E7E5F2}
.faq details:first-of-type{border-top:1px solid #E7E5F2}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0;font-size:16px;font-weight:600;color:var(--paper-text);cursor:pointer;list-style:none;transition:color .2s var(--ease),padding .2s var(--ease),border-color .2s var(--ease);border-left:3px solid transparent}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand-d)}
.faq details[open] summary{padding-left:16px;border-left-color:var(--brand)}
.faq .chev{flex:none;color:var(--weak);transition:transform .24s var(--ease),color .24s var(--ease)}
.faq details[open] .chev{transform:rotate(180deg);color:var(--brand)}
.faq .ans{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--paper-sub)}
.faq details[open] .ans{padding-left:19px}

/* ---------- cta / form ---------- */
.section-cta{position:relative;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden}
.section-cta::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(108,92,231,.34),rgba(53,208,192,.13) 46%,transparent 72%);opacity:.36;pointer-events:none}
.cta-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta-points{display:grid;gap:16px;margin-top:26px}
.cta-points li{position:relative;padding-left:24px;font-size:15.5px;line-height:1.75;color:#C9C5DC}
.cta-points li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:2px;background:var(--cyan)}
.join-form{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);padding:28px}
.field{margin-bottom:18px}
.field label{display:block;margin-bottom:8px;font-size:13px;color:var(--sub)}
.field input,.field select{width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);border:1px solid var(--line-strong);background:var(--panel);color:var(--text);font-size:15px;font-family:inherit;outline:none;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.field input::placeholder{color:var(--weak)}
.field input:focus,.field select:focus{border-color:var(--brand-l);box-shadow:0 0 0 3px rgba(108,92,231,.22)}
.field.invalid input{border-color:var(--gold)}
.err{display:none;margin-top:8px;font-size:13px;color:var(--gold)}
.field.invalid .err{display:block}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;line-height:1.7;color:var(--sub)}
.check input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand);flex:none}
.check.invalid{color:var(--gold)}
.check.invalid input{outline:2px solid var(--gold);outline-offset:2px}
.join-form .btn{width:100%;margin-top:6px}
.form-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:var(--weak)}
.form-msg{display:none;margin-top:14px;font-size:13.5px;color:var(--cyan)}
.form-msg.show{display:block}
.form-msg.warn{color:var(--gold)}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:14px;max-width:330px;font-size:14px;line-height:1.85;color:var(--sub)}
.footer-title{font-size:12px;letter-spacing:.08em;color:var(--weak);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--sub);transition:color .2s var(--ease)}
.footer-links a:hover{color:var(--cyan)}
.footer-copy{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;margin-top:56px;padding-top:24px;border-top:1px solid var(--line);font-size:13px;color:var(--weak)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .wrap{padding:0 40px}
  h1{font-size:42px}
  h2{font-size:30px}
  .section{padding:80px 0}
  .hero{padding:72px 0 68px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual img{height:340px}
  .split{grid-template-columns:1fr;gap:32px;margin-bottom:56px}
  .split img{height:280px}
  .stagger{grid-template-columns:1fr 1fr}
  .stagger > :nth-child(3){margin-top:0}
  .gallery{grid-template-columns:1fr 1fr;grid-template-rows:220px 220px 220px;grid-template-areas:"a b" "a c" "d d"}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .header-inner{height:auto;padding:12px 0;gap:12px;flex-wrap:wrap}
  .nav-links{order:3;width:100%;margin-left:0;overflow-x:auto;padding-bottom:2px}
  .nav-link,.mega-trigger{font-size:13.5px;padding:8px 10px}
  .nav-link.active::after{left:10px;right:10px}
  .header-cta{display:none}
  .mega-panel{position:fixed;left:16px;right:16px;top:104px;width:auto;max-height:70vh;overflow:auto;grid-template-columns:1fr}
  h1{font-size:34px;line-height:1.25}
  h2{font-size:27px}
  h3{font-size:19px}
  body{font-size:16.5px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .hero{padding:56px 0 52px}
  .hero-visual img{height:250px}
  .stagger{grid-template-columns:1fr}
  .stagger > :nth-child(2),.stagger > :nth-child(3){margin-top:0}
  .gallery{grid-template-columns:1fr;grid-template-rows:repeat(4,220px);grid-template-areas:"a" "b" "c" "d"}
  .gtext{opacity:1;transform:none}
  .step{grid-template-columns:48px 1fr;gap:14px}
  .step-no{width:44px;height:44px;font-size:13.5px}
  .steps::before{left:21px}
  .status-panel{padding:24px}
  .status-list li{flex-wrap:wrap}
  .pill{margin-left:0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-copy{margin-top:40px}
}
@media (max-width:640px){
  .wrap{padding:0 20px}
  .hero-facts span{padding:2px 12px;font-size:13px}
  .join-form{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .card:hover,.mega-card:hover{transform:none}
  .card:hover .card-img img,.gcard:hover img{transform:none}
}

/* roulang page: category2 */
:root{
    --night:#08070F;
    --deep:#0E0C1C;
    --panel:#16142A;
    --panel-2:#1E1B33;
    --primary:#6C5CE7;
    --primary-light:#8B7CF6;
    --primary-dark:#4B3FC4;
    --aurora:#35D0C0;
    --gold:#F0C36B;
    --ink:#EDEAF7;
    --ink-sub:#A9A5C0;
    --ink-weak:#6F6B87;
    --paper:#F7F6FC;
    --paper-ink:#14121F;
    --paper-sub:#5A5670;
    --paper-line:#E7E5F2;
    --line:rgba(255,255,255,.08);
    --r-card:14px;
    --r-img:12px;
    --r-btn:10px;
    --r-panel:12px;
    --ease:cubic-bezier(.22,.61,.36,1);
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:96px;}
  body{
    margin:0;
    background:var(--deep);
    color:var(--ink);
    font-family:var(--sans);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%;}
  h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:600;letter-spacing:-.02em;color:inherit;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  ::selection{background:rgba(108,92,231,.45);color:#fff;}
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:#0E0C1C;}
  ::-webkit-scrollbar-thumb{background:#2A2745;border-radius:8px;}
  ::-webkit-scrollbar-thumb:hover{background:#3A3660;}

  .wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
  @media (min-width:768px){ .wrap{padding:0 40px;} }
  @media (min-width:1280px){ .wrap{padding:0 64px;} }

  .anchor{display:block;width:0;height:0;}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(14,12,28,.9);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:20px;height:72px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;border:1px solid rgba(139,124,246,.4);background:rgba(108,92,231,.14);}
  .brand-text{font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
  .nav-link{position:relative;padding:10px 12px;font-size:14.5px;color:var(--ink-sub);border-radius:8px;transition:color .22s var(--ease),background .22s var(--ease);}
  .nav-link:hover{color:var(--ink);background:rgba(255,255,255,.04);}
  .nav-link.active{color:var(--ink);}
  .nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);}
  .header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

  .mega{position:relative;}
  .mega-trigger{
    display:inline-flex;align-items:center;gap:6px;
    padding:10px 12px;border:1px solid transparent;border-radius:8px;background:none;
    color:var(--ink-sub);font-size:14.5px;cursor:pointer;
    transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
  }
  .mega-trigger:hover,.mega.open .mega-trigger{color:var(--ink);background:rgba(255,255,255,.04);border-color:var(--line);}
  .mega-trigger svg{transition:transform .22s var(--ease);}
  .mega:hover .mega-trigger svg,.mega:focus-within .mega-trigger svg,.mega.open .mega-trigger svg{transform:rotate(180deg);}
  .mega-panel{
    position:absolute;right:0;top:calc(100% + 14px);
    width:min(820px,calc(100vw - 72px));
    display:grid;grid-template-columns:1.15fr .95fr .9fr;gap:26px;
    padding:24px;
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:16px;
    box-shadow:0 24px 60px rgba(0,0,0,.45);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s linear;
  }
  .mega:hover .mega-panel,.mega:focus-within .mega-panel,.mega.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
  .mega-col-title{font-size:12px;letter-spacing:.08em;color:var(--ink-weak);margin-bottom:10px;}
  .mega-item{display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--ink-sub);transition:background .2s var(--ease),color .2s var(--ease);}
  .mega-item:hover,.mega-item:focus-visible{background:rgba(139,124,246,.14);color:var(--ink);}
  .mega-card{display:block;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;background:var(--panel-2);transition:border-color .22s var(--ease),transform .22s var(--ease);}
  .mega-card:hover{border-color:rgba(139,124,246,.55);transform:translateY(-2px);}
  .mega-card img{width:100%;height:84px;object-fit:cover;}
  .mega-card span{display:block;padding:9px 12px;font-size:13px;color:var(--ink-sub);}

  .menu-toggle{
    display:none;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:var(--r-btn);
    border:1px solid var(--line);background:rgba(255,255,255,.03);
    color:var(--ink);cursor:pointer;
  }
  .menu-toggle:hover{border-color:rgba(139,124,246,.55);}

  /* ============ 按钮 / 标签 / 文字链 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:500;border:1px solid transparent;cursor:pointer;
    transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
  }
  .btn-primary{background:var(--primary);color:#fff;}
  .btn-primary:hover{background:var(--primary-light);transform:translateY(-1px);}
  .btn-primary:active{background:var(--primary-dark);transform:translateY(0);}
  .btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--ink);}
  .btn-ghost:hover{border-color:var(--primary-light);background:rgba(139,124,246,.1);}
  .btn:focus-visible{outline:2px solid var(--primary-light);outline-offset:3px;}
  .btn-sm{height:38px;padding:0 16px;font-size:14px;}

  .tag{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:999px;
    background:rgba(108,92,231,.16);border:1px solid rgba(139,124,246,.3);
    color:var(--primary-light);font-size:12px;letter-spacing:.08em;
  }
  .badge{
    display:inline-block;padding:4px 12px;border-radius:999px;margin-bottom:14px;
    background:rgba(108,92,231,.15);color:var(--primary-light);
    font-size:12px;letter-spacing:.05em;
  }
  .badge-aurora{background:rgba(53,208,192,.14);color:var(--aurora);}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;color:var(--aurora);
    border-bottom:2px solid transparent;padding-bottom:2px;
    transition:border-color .22s var(--ease),color .22s var(--ease);
  }
  .link-arrow::after{content:"→";font-size:13px;transition:transform .22s var(--ease);}
  .link-arrow:hover{border-bottom-color:var(--aurora);}
  .link-arrow:hover::after{transform:translateX(3px);}
  .link-arrow:focus-visible{outline:2px solid var(--primary-light);outline-offset:3px;}

  /* ============ 板块与标题 ============ */
  .section{padding:96px 0;}
  .section-tight{padding:72px 0;}
  @media (max-width:768px){ .section{padding:60px 0;} .section-tight{padding:48px 0;} }

  .sec-head{max-width:740px;margin-bottom:46px;}
  .sec-label{display:block;font-size:12px;letter-spacing:.08em;color:var(--aurora);margin-bottom:14px;}
  .sec-title{font-size:36px;line-height:1.25;margin-bottom:16px;}
  .sec-desc{font-size:16px;line-height:1.8;color:var(--ink-sub);}
  @media (max-width:768px){
    .sec-title{font-size:27px;}
    .sec-head{margin-bottom:32px;}
  }

  /* ============ 分类首屏 ============ */
  .cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
  .cat-hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
  .cat-hero-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.6) 0%,rgba(8,7,15,.86) 52%,#0E0C1C 100%);}
  .cat-hero-inner{position:relative;z-index:2;padding:132px 0 72px;max-width:880px;}
  .cat-hero h1{font-size:56px;line-height:1.15;margin:20px 0 20px;}
  .cat-hero-lead{font-size:17px;line-height:1.85;color:var(--ink-sub);max-width:660px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
  .hero-facts{display:flex;flex-wrap:wrap;list-style:none;margin-top:34px;}
  .hero-facts li{position:relative;padding:0 20px;font-size:14px;color:var(--ink-sub);}
  .hero-facts li:first-child{padding-left:0;}
  .hero-facts li+li{border-left:1px solid rgba(53,208,192,.5);}
  @media (max-width:768px){
    .cat-hero-inner{padding:96px 0 56px;}
    .cat-hero h1{font-size:33px;}
    .cat-hero-lead{font-size:15.5px;}
    .hero-facts li{padding:0 14px;font-size:13px;}
  }

  /* ============ 速查步骤 ============ */
  .step-list{list-style:none;border-top:1px solid var(--line);}
  .step-item{display:grid;grid-template-columns:96px 1fr;gap:26px;padding:34px 0;border-bottom:1px solid var(--line);align-items:start;}
  .step-num{font-family:var(--serif);font-size:40px;line-height:1;color:rgba(139,124,246,.55);font-variant-numeric:tabular-nums;}
  .step-item h3{font-size:21px;margin-bottom:10px;}
  .step-item p{font-size:15px;line-height:1.78;color:var(--ink-sub);max-width:820px;}
  @media (max-width:768px){
    .step-item{grid-template-columns:54px 1fr;gap:16px;padding:26px 0;}
    .step-num{font-size:28px;}
    .step-item h3{font-size:18px;}
  }

  /* ============ 卡片瀑布 ============ */
  .waterfall{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start;}
  .wf-card{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .28s var(--ease),border-color .28s var(--ease);
  }
  .wf-card:hover{transform:translateY(-2px);border-color:rgba(139,124,246,.5);}
  .wf-card picture,.wf-card img{width:100%;}
  .wf-card img{height:212px;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
  .wf-card:hover img{transform:scale(1.03);}
  .wf-body{padding:22px 22px 24px;}
  .wf-body h3{font-size:20px;line-height:1.4;margin-bottom:10px;}
  .wf-body p{font-size:15px;line-height:1.75;color:var(--ink-sub);margin-bottom:18px;}
  @media (min-width:1024px){
    .waterfall .wf-card:nth-child(even){margin-top:40px;}
  }
  @media (max-width:768px){
    .waterfall{grid-template-columns:1fr;gap:20px;}
    .wf-card img{height:180px;}
    .wf-body h3{font-size:18px;}
  }

  /* ============ 亮纸区 ============ */
  .paper-band{background:var(--paper);color:var(--paper-ink);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:96px 0;}
  .paper-band .sec-title{color:var(--paper-ink);}
  .paper-band .sec-desc{color:var(--paper-sub);}
  .paper-band .sec-label{color:var(--primary-dark);}
  @media (max-width:768px){ .paper-band{padding:60px 0;} }

  .compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
  .compare-col{
    background:#fff;border:1px solid var(--paper-line);border-radius:var(--r-card);
    padding:26px;transition:transform .28s var(--ease),box-shadow .28s var(--ease);
  }
  .compare-col:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(20,18,31,.07);}
  .compare-head{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;font-family:var(--sans);color:var(--paper-ink);margin-bottom:8px;}
  .compare-head .dot{width:9px;height:9px;border-radius:50%;background:var(--primary);}
  .compare-col.alt .compare-head .dot{background:var(--aurora);}
  .compare-col ul{list-style:none;}
  .compare-col li{position:relative;padding:15px 0 15px 22px;font-size:15px;line-height:1.75;color:var(--paper-sub);border-top:1px solid var(--paper-line);}
  .compare-col li:first-child{border-top:1px solid var(--paper-line);}
  .compare-col li::before{content:"";position:absolute;left:0;top:23px;width:8px;height:8px;border-radius:50%;background:var(--primary);}
  .compare-col.alt li::before{background:var(--aurora);}
  @media (max-width:768px){
    .compare{grid-template-columns:1fr;}
    .compare-col{padding:22px;}
  }

  .band-divider{height:1px;background:var(--paper-line);margin:64px 0;}
  @media (max-width:768px){ .band-divider{margin:44px 0;} }

  /* ============ FAQ ============ */
  .faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 56px;align-items:start;}
  .faq-col{min-width:0;}
  .faq-item{border-bottom:1px solid var(--paper-line);}
  .faq-item:first-child{border-top:1px solid var(--paper-line);}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
    padding:22px 0;background:none;border:none;cursor:pointer;text-align:left;
    font-size:16px;font-weight:600;color:var(--paper-ink);line-height:1.6;
  }
  .faq-q .chev{flex:0 0 auto;margin-top:4px;transition:transform .22s var(--ease);color:var(--primary-dark);}
  .faq-q:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
  .faq-item.open .faq-q .chev{transform:rotate(180deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
  .faq-item.open .faq-a{max-height:360px;}
  .faq-a-inner{margin:0 0 24px 2px;padding-left:16px;border-left:3px solid var(--primary);font-size:15px;line-height:1.85;color:var(--paper-sub);}
  @media (max-width:900px){ .faq-grid{grid-template-columns:1fr;gap:0;} }

  /* ============ CTA ============ */
  .cta-band{
    display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center;
    padding:52px;border:1px solid var(--line);border-radius:var(--r-card);
    background:linear-gradient(135deg,rgba(108,92,231,.16) 0%,rgba(53,208,192,.07) 100%);
  }
  .cta-band h2{font-size:32px;line-height:1.3;margin-bottom:16px;}
  .cta-band p{font-size:15.5px;line-height:1.8;color:var(--ink-sub);}
  .cta-points{list-style:none;margin-top:22px;}
  .cta-points li{position:relative;padding-left:20px;font-size:14.5px;line-height:1.75;color:var(--ink-sub);margin-bottom:10px;}
  .cta-points li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:1px;background:var(--aurora);}
  .cta-actions{display:flex;flex-direction:column;gap:14px;}
  .cta-note{font-size:13px;line-height:1.7;color:var(--ink-weak);}
  @media (max-width:900px){
    .cta-band{grid-template-columns:1fr;gap:28px;padding:32px 24px;}
    .cta-band h2{font-size:25px;}
  }

  /* ============ 页脚 ============ */
  .site-footer{background:var(--night);border-top:1px solid var(--line);padding:72px 0 32px;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;}
  .footer-brand .logo-text{font-family:var(--serif);color:var(--ink);}
  .footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--ink-weak);max-width:360px;}
  .footer-title{font-size:12px;letter-spacing:.08em;color:var(--ink-weak);margin-bottom:14px;}
  .footer-links a{display:block;padding:6px 0;font-size:14px;color:var(--ink-sub);transition:color .2s var(--ease);}
  .footer-links a:hover,.footer-links a:focus-visible{color:var(--aurora);}
  .footer-copy{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
    font-size:13px;color:var(--ink-weak);
  }
  @media (max-width:1024px){ .footer-grid{grid-template-columns:1fr 1fr;gap:32px;} }
  @media (max-width:640px){
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .site-footer{padding:56px 0 28px;}
  }

  /* ============ 响应式导航 ============ */
  @media (max-width:1200px){
    .brand-text{font-size:15.5px;}
    .nav-link,.mega-trigger{font-size:13.5px;padding:9px 9px;}
  }
  @media (max-width:1040px){
    .header-cta{display:none;}
  }
  @media (max-width:767px){
    .header-inner{height:64px;gap:12px;}
    .menu-toggle{display:inline-flex;}
    .brand-text{font-size:14.5px;white-space:normal;line-height:1.3;max-width:180px;}
    .nav-links{
      position:fixed;top:64px;left:0;right:0;bottom:0;
      flex-direction:column;align-items:stretch;gap:0;
      margin-left:0;padding:12px 20px 48px;
      background:var(--deep);overflow-y:auto;
      transform:translateX(100%);
      transition:transform .28s var(--ease);
      border-top:1px solid var(--line);
    }
    .nav-links.open{transform:translateX(0);}
    .nav-link{
      display:flex;align-items:center;min-height:52px;padding:0 4px;
      font-size:16px;color:var(--ink);border-radius:0;border-bottom:1px solid var(--line);
    }
    .nav-link.active{color:var(--primary-light);}
    .nav-link.active::after{display:none;}
    .mega{width:100%;}
    .mega-trigger{
      width:100%;justify-content:space-between;min-height:52px;
      padding:0 4px;border-radius:0;border-bottom:1px solid var(--line);
      font-size:16px;color:var(--ink);background:none;
    }
    .mega:hover .mega-trigger{background:none;}
    .mega-panel{
      position:static;width:100%;display:none;grid-template-columns:1fr;gap:20px;
      opacity:1;visibility:visible;transform:none;
      padding:16px 0 20px;background:transparent;border:none;box-shadow:none;
    }
    .mega.open .mega-panel{display:grid;}
    .mega:hover .mega-panel{opacity:1;visibility:visible;}
  }

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    *,*::before,*::after{
      animation-duration:.001ms !important;
      transition-duration:.001ms !important;
    }
    .wf-card:hover,.compare-col:hover,.mega-card:hover,.btn-primary:hover{transform:none;}
    .wf-card:hover img{transform:none;}
  }