/* roulang page: index */
:root{
  --brand:#FF5A1F;
  --brand-deep:#D93F0B;
  --brand-soft:rgba(255,90,31,.10);
  --ink:#14161A;
  --ink-2:#2A2E35;
  --muted:#6B6F76;
  --line:#E8E5DF;
  --bg:#F7F6F3;
  --surface:#FFFFFF;
  --cyan:#0FA3A3;
  --radius:14px;
  --radius-sm:10px;
  --pill:999px;
  --shadow:0 1px 2px rgba(20,22,26,.04),0 8px 24px rgba(20,22,26,.06);
  --shadow-hover:0 12px 32px rgba(20,22,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .16s var(--ease);}
a:hover{color:var(--brand-deep);}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* 栅格间距微调 */
.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.grid-margin-x>.cell{width:calc(100% - 24px);margin-left:12px;margin-right:12px;}
.grid-margin-x>.small-12{width:calc(100% - 24px);}
@media screen and (min-width:640px){
  .grid-margin-x>.medium-4{width:calc(33.33333% - 24px);}
  .grid-margin-x>.medium-6{width:calc(50% - 24px);}
  .grid-margin-x>.medium-8{width:calc(66.66667% - 24px);}
}
@media screen and (min-width:1024px){
  .grid-margin-x>.large-3{width:calc(25% - 24px);}
  .grid-margin-x>.large-4{width:calc(33.33333% - 24px);}
  .grid-margin-x>.large-5{width:calc(41.66667% - 24px);}
  .grid-margin-x>.large-6{width:calc(50% - 24px);}
  .grid-margin-x>.large-7{width:calc(58.33333% - 24px);}
  .grid-margin-x>.large-8{width:calc(66.66667% - 24px);}
}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,243,.92);
  backdrop-filter:saturate(150%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-condensed{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(20,22,26,.06);background:rgba(255,255,255,.94);}
.nav-top{padding:16px 0;transition:padding .2s var(--ease);}
.site-header.is-condensed .nav-top{padding:8px 0;}
.nav-top-inner{display:flex;align-items:center;gap:24px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  display:flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--ink);color:#fff;font-size:15px;font-weight:800;letter-spacing:.04em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-.02em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.nav-search{
  flex:1 1 auto;max-width:360px;position:relative;display:flex;align-items:center;
}
.nav-search i{position:absolute;left:14px;font-size:13px;color:var(--muted);pointer-events:none;}
.nav-search input{
  width:100%;height:44px;padding:0 14px 0 38px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;font-size:14px;outline:none;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.nav-search input::placeholder{color:#9BA0A6;}
.nav-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-tabs-wrap{border-top:1px solid var(--line);}
.nav-tabs-inner{padding:10px 20px;}
.channel-tabs{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-tabs::-webkit-scrollbar{display:none;}
.tab-pill{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:var(--pill);
  border:1px solid var(--line);background:transparent;color:var(--ink-2);
  font-size:14px;font-weight:600;white-space:nowrap;transition:all .16s var(--ease);
}
.tab-pill:hover{border-color:rgba(255,90,31,.45);color:var(--brand-deep);background:var(--brand-soft);}
.tab-pill.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}
.tab-pill.is-active:hover{background:var(--ink);color:#fff;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  border:1px solid transparent;background:transparent;color:var(--ink);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .12s var(--ease);
}
.btn i{transition:transform .2s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}
.btn-pill{border-radius:var(--pill);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.22);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:0 12px 26px rgba(255,90,31,.28);}
.btn-ghost{border-color:var(--line);background:transparent;color:var(--ink);}
.btn-ghost:hover{border-color:rgba(255,90,31,.45);color:var(--brand-deep);background:var(--brand-soft);}
.btn-light{background:#fff;color:var(--ink);border-color:#fff;}
.btn-light:hover{background:#F1EFEA;color:var(--ink);}
.btn-outline-light{border-color:rgba(255,255,255,.32);color:#fff;}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* ===== 首屏 ===== */
.hero{
  position:relative;overflow:hidden;
  padding:76px 0 92px;
  background-image:linear-gradient(180deg,rgba(247,246,243,.94) 0%,rgba(247,246,243,.99) 70%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(20,22,26,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(20,22,26,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
}
.hero-inner{position:relative;z-index:2;}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;
  border-radius:var(--pill);border:1px solid var(--line);background:#fff;
  font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.02em;
}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(15,163,163,.14);}
.hero h1{
  margin-top:22px;
  font-size:clamp(30px,4.6vw,52px);
  font-weight:800;line-height:1.15;letter-spacing:-.02em;
}
.hero-sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:36px;margin-top:38px;padding-top:24px;border-top:1px solid var(--line);}
.hero-trust li{display:flex;flex-direction:column;gap:2px;}
.hero-trust strong{font-size:19px;font-weight:800;letter-spacing:-.01em;}
.hero-trust span{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.hero-visual{position:relative;padding:10px 0 10px 10px;}
.device-frame{position:relative;border-radius:18px;}
.device-frame img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow);
  animation:floaty 6.5s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translateY(0);}50%{transform:translateY(-10px);}}
.hero-badge{
  position:absolute;right:22px;bottom:26px;z-index:3;
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:var(--pill);background:var(--ink);color:#fff;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;box-shadow:var(--shadow);
}
.hero-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);}

/* ===== 通用板块 ===== */
.section{padding:104px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.02em;line-height:1.25;}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;}
.section-ink{background:var(--ink);color:#fff;}
.section-ink .section-head p{color:rgba(255,255,255,.62);}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand-deep);text-transform:uppercase;margin-bottom:14px;}

/* 四项确认 */
.confirm-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.02em;line-height:1.25;}
.confirm-head p{margin-top:14px;color:var(--muted);font-size:15.5px;}
.step-list{border-top:1px solid var(--line);}
.step-list li{
  display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);
  transition:padding-left .2s var(--ease);
}
.step-list li:hover{padding-left:6px;}
.step-no{
  flex:0 0 auto;font-size:22px;font-weight:800;color:#C9C4BB;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;transition:color .2s var(--ease);
}
.step-list li:hover .step-no{color:var(--brand);}
.step-list h3{font-size:18px;font-weight:600;letter-spacing:-.01em;}
.step-list p{margin-top:6px;font-size:15px;color:var(--muted);line-height:1.75;}

/* 功能轮播 */
.feature-orbit{margin-top:8px;}
.feature-orbit .orbit-wrapper{border-radius:var(--radius);}
.feature-orbit .orbit-container{background:transparent;margin:0;}
.feature-orbit .orbit-slide{display:none;}
.feature-orbit .orbit-slide.is-active{display:block;animation:fadeUp .3s var(--ease);}
@keyframes fadeUp{from{opacity:0;}to{opacity:1;}}
.slide-figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);}
.slide-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.slide-caption{padding:22px 24px 26px;}
.slide-caption h3{font-size:19px;font-weight:600;}
.slide-caption p{margin-top:8px;font-size:15px;color:var(--muted);max-width:760px;}
.feature-orbit .orbit-controls{background:transparent;}
.feature-orbit .orbit-previous,.feature-orbit .orbit-next{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);
  color:var(--ink);z-index:5;display:flex;align-items:center;justify-content:center;
  top:50%;transform:translateY(-50%);transition:border-color .2s var(--ease),color .2s var(--ease);
}
.feature-orbit .orbit-previous:hover,.feature-orbit .orbit-next:hover{border-color:var(--brand);color:var(--brand);}
.feature-orbit .orbit-previous{left:18px;}
.feature-orbit .orbit-next{right:18px;}
.feature-orbit .orbit-bullets{display:flex;justify-content:center;gap:10px;margin-top:22px;}
.feature-orbit .orbit-bullets button{width:10px;height:10px;border-radius:50%;background:#D6D1C8;padding:0;transition:background .2s var(--ease),width .2s var(--ease);}
.feature-orbit .orbit-bullets button.is-active{background:var(--brand);width:22px;border-radius:var(--pill);}

/* 访问方式 Tabs */
.access-tabs.tabs{
  display:flex;gap:10px;border:none;background:transparent;margin:0 0 26px;flex-wrap:wrap;
}
.access-tabs.tabs .tabs-title{margin:0;}
.access-tabs.tabs .tabs-title>a{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--pill);
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  font-size:15px;font-weight:600;line-height:1;outline:none;transition:all .16s var(--ease);
}
.access-tabs.tabs .tabs-title>a:hover{color:var(--brand-deep);border-color:rgba(255,90,31,.45);background:var(--brand-soft);}
.access-tabs.tabs .tabs-title.is-active>a{background:var(--ink);border-color:var(--ink);color:#fff;}
.access-tabs-content{background:transparent;border:none;}
.access-panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:30px 32px;box-shadow:var(--shadow);}
.access-panel h3{font-size:19px;font-weight:600;}
.access-panel p{margin-top:10px;font-size:15.5px;color:var(--muted);}
.access-panel .kv-line{display:flex;flex-wrap:wrap;gap:14px 32px;margin-top:20px;padding-top:20px;border-top:1px dashed var(--line);}
.access-panel .kv-line span{font-size:14px;color:var(--ink-2);}
.access-panel .kv-line span b{font-weight:700;color:var(--ink);}

/* 系统要求规格条 */
.spec-list{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;box-shadow:var(--shadow);}
.spec-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;padding:22px 26px;
  border-bottom:1px solid var(--line);transition:background .2s var(--ease);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:#FBFAF7;}
.spec-platform{display:flex;align-items:center;gap:12px;flex:0 0 200px;font-size:16px;font-weight:700;}
.spec-platform i{width:34px;height:34px;border-radius:10px;background:var(--brand-soft);color:var(--brand-deep);display:flex;align-items:center;justify-content:center;font-size:15px;}
.spec-items{display:flex;flex-wrap:wrap;flex:1 1 auto;gap:12px 40px;}
.spec-items div{display:flex;flex-direction:column;gap:2px;}
.spec-items dt{font-size:12.5px;color:var(--muted);letter-spacing:.04em;}
.spec-items dd{margin:0;font-size:14.5px;font-weight:600;}
.spec-note{margin-top:18px;font-size:14px;color:var(--muted);}

/* 热度条 */
.heat-wrap{display:grid;gap:18px;}
.heat-item{display:grid;grid-template-columns:190px 1fr 52px;align-items:center;gap:18px;}
.heat-item span{font-size:15px;font-weight:600;}
.heat-bar{height:8px;border-radius:var(--pill);background:#EDEAE4;overflow:hidden;}
.heat-bar i{display:block;height:100%;border-radius:var(--pill);background:linear-gradient(90deg,var(--brand),#FF8A4C);}
.heat-item em{font-style:normal;font-size:14px;font-weight:700;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.tag{display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--pill);border:1px solid var(--line);background:#fff;font-size:13.5px;color:var(--ink-2);transition:all .16s var(--ease);}
.tag:hover{border-color:rgba(255,90,31,.45);color:var(--brand-deep);background:var(--brand-soft);}

/* 评价墙 */
.review-highlight{
  border-left:2px solid var(--brand);padding:6px 0 6px 26px;margin-bottom:38px;
}
.review-highlight p{font-size:clamp(20px,2.4vw,25px);font-weight:600;line-height:1.6;letter-spacing:-.01em;}
.review-highlight footer{margin-top:16px;font-size:14px;color:var(--muted);}
.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  position:relative;box-shadow:var(--shadow);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.review-card::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:2px;border-radius:2px;background:var(--brand);}
.review-card:hover{transform:translateY(-3px);border-color:rgba(255,90,31,.4);box-shadow:var(--shadow-hover);}
.review-card .stars{color:var(--brand);font-size:13px;letter-spacing:2px;}
.review-card p{margin-top:12px;font-size:15px;color:var(--ink-2);}
.review-card foot,.review-card .who{margin-top:16px;display:flex;flex-direction:column;gap:2px;font-size:13px;color:var(--muted);}
.review-card .who b{font-weight:700;color:var(--ink);font-size:14px;}
.review-grid .review-card:nth-child(2){transform:translateY(28px);}
.review-grid .review-card:nth-child(2):hover{transform:translateY(25px);}
.review-grid .review-card:nth-child(4){transform:translateY(28px);}
.review-grid .review-card:nth-child(4):hover{transform:translateY(25px);}

/* 下载转化 */
.download-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start;}
.dl-steps{counter-reset:dl;margin-top:26px;}
.dl-steps li{
  display:flex;gap:16px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.dl-steps li:last-child{border-bottom:0;}
.dl-steps b{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center;margin-top:4px;}
.dl-steps p{font-size:15px;color:rgba(255,255,255,.72);}
.dl-steps p strong{color:#fff;font-weight:600;}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.dl-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);
  padding:28px;display:flex;flex-direction:column;gap:20px;
}
.qr-box{display:flex;align-items:center;gap:18px;}
.qr-box img{width:120px;height:120px;border-radius:var(--radius-sm);object-fit:cover;background:#fff;}
.qr-box div{font-size:14px;color:rgba(255,255,255,.7);}
.qr-box div b{display:block;color:#fff;font-size:15.5px;font-weight:600;margin-bottom:6px;}
.channel-list{display:flex;flex-direction:column;gap:12px;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;}
.channel-list li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(255,255,255,.75);}
.channel-list li i{color:var(--cyan);font-size:13px;}
.dl-meta{font-size:13px;color:rgba(255,255,255,.5);letter-spacing:.02em;}

/* 资讯列表 */
.post-card{
  display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(255,90,31,.4);box-shadow:var(--shadow-hover);}
.post-cover{display:block;overflow:hidden;}
.post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s var(--ease);}
.post-card:hover .post-cover img{transform:scale(1.04);}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-cat{
  align-self:flex-start;display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--pill);
  background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:700;letter-spacing:.03em;
}
.post-body h3{margin-top:14px;font-size:17.5px;font-weight:600;line-height:1.5;letter-spacing:-.01em;}
.post-body h3 a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{
  margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);letter-spacing:.02em;
}
.post-meta .more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-deep);}
.post-meta .more i{transition:transform .2s var(--ease);}
.post-meta .more:hover i{transform:translateX(4px);}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius);background:#fff;
  padding:56px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:18px;
}
.empty-state p{color:var(--muted);font-size:15px;}

/* FAQ */
.faq-accordion{border:0;background:transparent;}
.faq-accordion .accordion-item{border-bottom:1px solid var(--line);background:transparent;}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--line);}
.faq-accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
  border:0;background:transparent;transition:color .16s var(--ease);
}
.faq-accordion .accordion-title::before{display:none;content:none;}
.faq-accordion .accordion-title::after{
  content:"+";flex:0 0 auto;font-size:22px;font-weight:400;color:var(--muted);line-height:1;
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--brand-deep);}
.faq-accordion .accordion-item.is-active .accordion-title::after{transform:rotate(45deg);color:var(--brand);}
.faq-accordion .accordion-content{
  display:none;border:0;background:transparent;padding:0 4px 24px;color:var(--muted);font-size:15px;line-height:1.75;
}
.faq-accordion .accordion-content p{margin-bottom:10px;}
.faq-accordion .accordion-content p:last-child{margin-bottom:0;}

/* 底部 CTA */
.cta-band{
  border:1px solid var(--line);border-radius:18px;background:
    linear-gradient(120deg,rgba(255,90,31,.10),rgba(255,90,31,0) 55%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat,
    #fff;
  padding:48px 44px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;letter-spacing:-.02em;line-height:1.3;max-width:520px;}
.cta-band p{margin-top:10px;font-size:15px;color:var(--muted);max-width:520px;}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand strong{color:#fff;font-size:16px;font-weight:800;letter-spacing:-.01em;}
.footer-grid p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.58);}
.footer-grid h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:18px;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{font-size:14.5px;color:rgba(255,255,255,.68);display:inline-flex;align-items:center;gap:8px;transition:color .16s var(--ease),transform .16s var(--ease);}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  padding:22px 0 30px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.45);letter-spacing:.02em;
}

/* 入场动画 */
[data-anim]{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
[data-anim].is-visible{opacity:1;transform:none;}

/* ===== 响应式 ===== */
@media screen and (max-width:1024px){
  .section{padding:84px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .download-grid{grid-template-columns:1fr;gap:36px;}
  .review-grid{grid-template-columns:1fr;}
  .review-grid .review-card:nth-child(2),
  .review-grid .review-card:nth-child(4){transform:none;}
  .review-grid .review-card:nth-child(2):hover,
  .review-grid .review-card:nth-child(4):hover{transform:translateY(-3px);}
}
@media screen and (max-width:768px){
  body{font-size:15px;}
  .nav-search{display:none;}
  .brand-text em{display:none;}
  .nav-tabs-inner{padding:8px 20px;}
  .hero{padding:52px 0 64px;}
  .hero-sub{font-size:16px;}
  .hero-trust{gap:24px;}
  .hero-trust strong{font-size:17px;}
  .hero-visual{padding:12px 0 0;}
  .section,.section-tight{padding:60px 0;}
  .section-head{margin-bottom:34px;}
  .step-list li{gap:16px;padding:20px 0;}
  .spec-platform{flex:0 0 100%;}
  .heat-item{grid-template-columns:1fr 44px;gap:10px 12px;}
  .heat-item span{grid-column:1 / -1;}
  .access-panel{padding:24px 20px;}
  .cta-band{padding:32px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px;}
  .feature-orbit .orbit-previous,.feature-orbit .orbit-next{display:none;}
}
@media screen and (max-width:520px){
  .container{padding:0 16px;}
  .nav-top{padding:12px 0;}
  .brand-mark{width:38px;height:38px;font-size:13.5px;}
  .brand-text strong{font-size:14.5px;}
  .nav-actions .btn{padding:0 16px;font-size:14px;height:44px;}
  .hero h1{font-size:27px;}
  .hero-actions .btn{width:100%;}
  .hero-trust{display:grid;grid-template-columns:1fr 1fr;}
  .post-meta{flex-direction:column;align-items:flex-start;gap:8px;}
  .dl-actions .btn{width:100%;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  [data-anim]{opacity:1 !important;transform:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand:#FF5A1F;
  --brand-deep:#D93F0B;
  --brand-soft:rgba(255,90,31,.10);
  --ink:#14161A;
  --ink-2:#33373E;
  --muted:#6B6F76;
  --bg:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E8E5DF;
  --accent:#0FA3A3;
  --radius:14px;
  --radius-sm:10px;
  --pill:999px;
  --shadow-1:0 1px 2px rgba(20,22,26,.04), 0 8px 24px rgba(20,22,26,.06);
  --shadow-2:0 12px 32px rgba(20,22,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-feature-settings:"tnum" 1,"kern" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-deep);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--muted);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.02em;line-height:1.25;margin:12px 0 10px;}
.section-head p{color:var(--muted);font-size:15.5px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-sm);
  border:1px solid transparent;font-weight:600;font-size:15px;
  cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn i{transition:transform .2s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.24);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:0 10px 26px rgba(217,63,11,.28);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:rgba(255,90,31,.5);color:var(--brand-deep);background:#fff;}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;color:#fff;}
.btn-pill{border-radius:var(--pill);}
.btn-block{width:100%;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--pill);
  background:#fff;border:1px solid var(--line);
  font-size:12.5px;color:var(--muted);letter-spacing:.02em;
}
.badge-dot::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
.pill-cat{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:var(--pill);
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(247,246,243,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(20,22,26,.06);background:rgba(247,246,243,.98);}
.nav-top-inner{display:flex;align-items:center;gap:20px;min-height:var(--nav-h);transition:min-height .25s var(--ease);}
.site-header.is-stuck .nav-top-inner{min-height:62px;}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);flex-shrink:0;}
.brand:hover{color:var(--ink);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;background:var(--ink);color:#fff;
  font-weight:800;font-size:15px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16.5px;font-weight:800;letter-spacing:-.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.nav-search{
  flex:1;max-width:420px;display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 14px;height:44px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search i{color:var(--muted);font-size:14px;}
.nav-search input{flex:1;border:0;background:transparent;height:42px;outline:none;color:var(--ink);font-size:14.5px;}
.nav-search input::placeholder{color:#9AA0A6;}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.13);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-tabs-wrap{border-top:1px solid var(--line);}
.nav-tabs-inner{display:flex;align-items:center;gap:10px;padding-top:10px;padding-bottom:10px;}
.channel-tabs{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-tabs::-webkit-scrollbar{display:none;}
.tab-pill{
  display:inline-flex;align-items:center;min-height:38px;padding:0 18px;border-radius:var(--pill);
  border:1px solid var(--line);background:transparent;color:var(--ink-2);
  font-size:14.5px;font-weight:500;white-space:nowrap;
  transition:all .16s var(--ease);
}
.tab-pill:hover{border-color:rgba(255,90,31,.5);color:var(--brand-deep);}
.tab-pill.is-active{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600;}

/* 面包屑 */
.breadcrumb-bar{padding:22px 0 0;background:var(--bg);}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);}
.breadcrumb li{display:flex;align-items:center;gap:8px;max-width:100%;}
.breadcrumb li+li::before{content:"/";color:#C9C5BD;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand-deep);}
.breadcrumb [aria-current]{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:46vw;}

/* 文章头部 */
.article-hero{padding:26px 0 34px;border-bottom:1px solid var(--line);}
.article-hero .meta-top{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:18px;}
.article-hero h1{
  font-size:clamp(28px,4.4vw,50px);font-weight:800;letter-spacing:-.02em;line-height:1.18;
  max-width:900px;color:var(--ink);
}
.article-hero .lead{margin-top:16px;max-width:760px;color:var(--ink-2);font-size:16.5px;}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;
  margin-top:22px;font-size:13px;letter-spacing:.02em;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:#A8A49B;font-size:12.5px;}

/* 正文 */
.article-shell{padding:52px 0 72px;}
.article-body{max-width:760px;margin:0 auto;}
.prose{font-size:16.5px;line-height:1.85;color:var(--ink-2);}
.prose > *+*{margin-top:1.2em;}
.prose h2{
  font-size:clamp(21px,2.6vw,27px);font-weight:700;letter-spacing:-.015em;
  color:var(--ink);margin-top:2em;padding-left:16px;position:relative;line-height:1.35;
}
.prose h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:3px;background:var(--brand);}
.prose h3{font-size:18.5px;font-weight:600;color:var(--ink);margin-top:1.6em;letter-spacing:-.01em;}
.prose p{color:var(--ink-2);}
.prose a{color:var(--brand-deep);border-bottom:1px solid rgba(217,63,11,.28);}
.prose a:hover{border-bottom-color:var(--brand);}
.prose ul,.prose ol{margin:1.1em 0;padding-left:0;}
.prose ul li,.prose ol li{position:relative;padding-left:26px;margin:10px 0;color:var(--ink-2);}
.prose ul li::before{content:"";position:absolute;left:6px;top:.78em;width:7px;height:7px;border-radius:2px;background:var(--brand);}
.prose ol{counter-reset:prose-ol;}
.prose ol li{counter-increment:prose-ol;}
.prose ol li::before{
  content:counter(prose-ol,decimal-leading-zero);
  position:absolute;left:0;top:0;color:var(--brand-deep);font-weight:700;font-size:13.5px;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.prose blockquote{
  margin:1.6em 0;padding:20px 24px;border-left:3px solid var(--brand);
  background:#fff;border-radius:0 var(--radius) var(--radius) 0;box-shadow:var(--shadow-1);
  color:var(--ink);font-size:16.5px;
}
.prose blockquote p{margin:0;color:var(--ink);}
.prose img{border-radius:var(--radius);margin:1.6em 0;box-shadow:var(--shadow-1);width:100%;}
.prose figure{margin:1.6em 0;}
.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);}
.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;}
.prose th{background:#F2F0EC;font-weight:600;color:var(--ink);}
.prose code{background:#F2F0EC;padding:2px 7px;border-radius:6px;font-size:14px;color:var(--brand-deep);}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0;}

/* 空态 */
.empty-state{
  max-width:760px;margin:0 auto;background:#fff;border:1px dashed var(--line);
  border-radius:var(--radius);padding:48px 32px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px;color:var(--ink);}
.empty-state p{color:var(--muted);margin-bottom:22px;font-size:15.5px;}

/* 正文内 CTA */
.inline-cta{
  max-width:760px;margin:56px auto 0;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-1);overflow:hidden;
  display:grid;grid-template-columns:1.15fr .85fr;
}
.inline-cta .cta-copy{padding:30px 28px;}
.inline-cta h3{font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.01em;margin-bottom:10px;}
.inline-cta p{color:var(--muted);font-size:15px;margin-bottom:20px;}
.inline-cta .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.inline-cta .cta-media{position:relative;min-height:220px;background:#EFEDE8;}
.inline-cta .cta-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.quote-strip{
  max-width:760px;margin:22px auto 0;display:flex;align-items:center;gap:12px;
  font-size:13px;color:var(--muted);
}
.quote-strip::before{content:"";width:22px;height:1px;background:var(--line);}

/* 相关推荐 */
.related{padding:64px 0;border-top:1px solid var(--line);}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-1);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(255,90,31,.32);}
.post-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EFEDE8;}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .thumb img{transform:scale(1.04);}
.post-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card h3{font-size:17px;font-weight:700;line-height:1.45;color:var(--ink);letter-spacing:-.01em;}
.post-card p{font-size:14.5px;color:var(--muted);line-height:1.7;flex:1;}
.post-card .more{font-size:14px;font-weight:600;color:var(--brand-deep);display:inline-flex;align-items:center;gap:7px;}
.post-card .more i{transition:transform .2s var(--ease);}
.post-card:hover .more i{transform:translateX(4px);}

/* 上下篇 */
.pager{display:flex;flex-wrap:wrap;gap:16px;max-width:760px;margin:0 auto;padding:0 0 8px;}
.pager a{
  flex:1 1 240px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;color:var(--ink);box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.pager a:hover{border-color:rgba(255,90,31,.32);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.pager span{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.04em;margin-bottom:6px;}
.pager strong{font-size:15px;font-weight:600;}

/* 底部 CTA */
.bottom-cta{
  background:var(--ink);color:#fff;border-radius:0;
  padding:72px 0;position:relative;overflow:hidden;
}
.bottom-cta::after{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.14;mix-blend-mode:luminosity;pointer-events:none;
}
.bottom-cta .inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;}
.bottom-cta h2{color:#fff;font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:-.02em;line-height:1.3;max-width:620px;}
.bottom-cta p{color:rgba(255,255,255,.7);font-size:15px;margin-top:12px;max-width:560px;}
.bottom-cta .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.bottom-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3);}
.bottom-cta .btn-ghost:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.08);}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;}
.footer-brand strong{display:block;font-size:17px;font-weight:800;letter-spacing:-.01em;margin-bottom:12px;}
.footer-brand p{font-size:14.5px;color:var(--muted);max-width:340px;}
.footer-brand .badge{margin-top:16px;}
.site-footer h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:16px;letter-spacing:.02em;}
.footer-links li{margin-bottom:11px;}
.footer-links a{font-size:14.5px;color:var(--muted);display:inline-block;transition:color .18s var(--ease),transform .18s var(--ease);}
.footer-links a:hover{color:var(--brand-deep);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{opacity:1;transform:none;transition:opacity .55s var(--ease),transform .55s var(--ease);}

@media (max-width:1024px){
  .section{padding:72px 0;}
  .nav-search{max-width:280px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:768px){
  .nav-top-inner{flex-wrap:wrap;gap:12px;padding-top:12px;padding-bottom:10px;min-height:0;}
  .site-header.is-stuck .nav-top-inner{min-height:0;}
  .brand-text em{display:none;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;}
  .nav-actions .btn{min-height:40px;padding:0 16px;font-size:14px;}
  .section{padding:56px 0;}
  .article-hero h1{font-size:26px;}
  .article-shell{padding:36px 0 52px;}
  .inline-cta{grid-template-columns:1fr;}
  .inline-cta .cta-media{order:-1;min-height:180px;aspect-ratio:16/9;}
  .card-grid{grid-template-columns:1fr;}
  .bottom-cta{padding:56px 0;}
  .breadcrumb [aria-current]{max-width:60vw;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand-mark{width:38px;height:38px;font-size:14px;}
  .brand-text strong{font-size:15px;}
  .article-hero h1{font-size:23px;}
  .prose{font-size:15.5px;}
  .prose h2{font-size:20px;}
  .pager a{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --brand:#FF5A1F;
  --brand-deep:#D93F0B;
  --ink:#14161A;
  --ink-soft:#3A3F47;
  --muted:#6B6F76;
  --bg:#F7F6F3;
  --line:#E8E5DF;
  --accent:#0FA3A3;
  --card:#FFFFFF;
  --radius-sm:10px;
  --radius:14px;
  --pill:999px;
  --shadow-sm:0 1px 2px rgba(20,22,26,.04),0 8px 24px rgba(20,22,26,.06);
  --shadow-lg:0 12px 32px rgba(20,22,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --space:24px;
}

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

html{-webkit-text-size-adjust:100%;}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3{letter-spacing:-0.02em;}
table{border-collapse:collapse;}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

.num,.stat,em,time{font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(247,246,243,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{
  box-shadow:0 6px 20px rgba(20,22,26,.06);
  background:rgba(247,246,243,.98);
}

.nav-top-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:74px;
  transition:height .24s var(--ease);
}
.site-header.is-scrolled .nav-top-inner{height:62px;}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border-radius:12px;
  background:var(--ink);
  color:#fff;
  font-weight:800;
  font-size:15px;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-0.01em;}
.brand-text em{
  font-style:normal;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.02em;
}

.nav-search{
  flex:1 1 auto;
  max-width:360px;
  display:flex;
  align-items:center;
  gap:10px;
  height:42px;
  padding:0 14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search i{color:var(--muted);font-size:14px;}
.nav-search input{
  flex:1;
  border:0;
  background:transparent;
  outline:none;
  font-size:14px;
  min-width:0;
}
.nav-search input::placeholder{color:#9AA0A6;}
.nav-search:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(255,90,31,.14);
}

.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto;}

.nav-tabs-wrap{border-top:1px solid var(--line);}
.nav-tabs-inner{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 20px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.nav-tabs-inner::-webkit-scrollbar{display:none;}

.channel-tabs{display:flex;align-items:center;gap:10px;flex-wrap:nowrap;}

.tab-pill{
  display:inline-flex;
  align-items:center;
  min-height:38px;
  padding:0 18px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  font-size:14px;
  font-weight:600;
  color:var(--ink-soft);
  white-space:nowrap;
  background:transparent;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.tab-pill:hover{
  border-color:rgba(255,90,31,.4);
  color:var(--brand-deep);
  transform:translateY(-1px);
}
.tab-pill.is-active{
  background:var(--ink);
  border-color:var(--ink);
  color:#fff;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn i{transition:transform .2s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}

.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.22);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-lg);}

.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:rgba(255,90,31,.45);color:var(--brand-deep);background:#fff;}

.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;}

.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:#F1EFEA;color:var(--brand-deep);}

.btn-pill{border-radius:var(--pill);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  letter-spacing:.02em;
  margin-bottom:22px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:#C6C2BA;}
.breadcrumb a{color:var(--muted);transition:color .16s var(--ease);}
.breadcrumb a:hover{color:var(--brand-deep);}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600;}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  padding:52px 0 64px;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;
  background-position:center;
  opacity:.07;
  pointer-events:none;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(20,22,26,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,22,26,.035) 1px,transparent 1px);
  background-size:30px 30px;
  pointer-events:none;
}
.cat-hero > .container{position:relative;z-index:2;}

.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:52px;
  align-items:center;
}

.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:var(--pill);
  background:#fff;
  border:1px solid var(--line);
  font-size:13px;
  font-weight:600;
  color:var(--ink-soft);
  letter-spacing:.02em;
  margin-bottom:20px;
}
.hero-eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 3px rgba(15,163,163,.16);
}

h1{
  font-size:clamp(30px,4.2vw,50px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-0.02em;
  margin-bottom:18px;
}
h1 .h1-key{color:var(--brand-deep);}

.hero-lead{
  font-size:17px;
  color:var(--ink-soft);
  max-width:600px;
  margin-bottom:28px;
}

.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}

.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-facts li{display:flex;flex-direction:column;gap:2px;}
.hero-facts .fact-label{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.hero-facts .fact-value{font-size:15px;font-weight:700;}

.hero-media{position:relative;}
.hero-media .media-frame{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--shadow-sm);
  aspect-ratio:4/3;
}
.hero-media .media-frame img{width:100%;height:100%;object-fit:cover;object-position:center;}
.hero-float{
  position:absolute;
  left:-18px;
  bottom:26px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px 18px;
  box-shadow:var(--shadow-sm);
  animation:floaty 5s ease-in-out infinite;
  min-width:190px;
}
.hero-float .float-label{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.hero-float .float-value{font-size:20px;font-weight:800;color:var(--brand-deep);}

@keyframes floaty{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-8px);}
}

/* ============ 主体两栏 ============ */
.cat-body{padding:64px 0 80px;}
.cat-layout{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:52px;
  align-items:start;
}

.anchor-nav{
  position:sticky;
  top:118px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:#fff;
  padding:20px 18px;
  box-shadow:var(--shadow-sm);
}
.anchor-nav h2{
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--muted);
  text-transform:uppercase;
  margin-bottom:12px;
}
.anchor-nav ol{display:flex;flex-direction:column;gap:2px;}
.anchor-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:600;
  color:var(--ink-soft);
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.anchor-nav a .idx{
  font-size:12px;
  font-weight:700;
  color:#B9B4AB;
  font-variant-numeric:tabular-nums;
}
.anchor-nav a:hover{background:#F7F6F3;color:var(--brand-deep);transform:translateX(2px);}
.anchor-nav a.is-current{background:rgba(255,90,31,.09);color:var(--brand-deep);}
.anchor-nav a.is-current .idx{color:var(--brand);}

/* ============ 分节 ============ */
.section{padding:52px 0;border-top:1px solid var(--line);}
.section:first-of-type{border-top:0;padding-top:0;}
.section:last-of-type{padding-bottom:16px;}

.section-head{margin-bottom:32px;max-width:760px;}
.section-head .num-badge{
  display:block;
  font-size:42px;
  font-weight:800;
  line-height:1;
  color:var(--line);
  letter-spacing:-0.03em;
  margin-bottom:10px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.25;
  margin-bottom:12px;
}
.section-head p{color:var(--ink-soft);font-size:16px;}

.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:44px;
  align-items:center;
}
.split.is-reverse .split-media{order:-1;}

.split-media .media-frame{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--shadow-sm);
  aspect-ratio:4/3;
}
.split-media .media-frame img{width:100%;height:100%;object-fit:cover;object-position:center;}
.split-media figcaption{
  font-size:13px;
  color:var(--muted);
  margin-top:10px;
  letter-spacing:.02em;
}

.point-list{display:flex;flex-direction:column;gap:18px;}
.point-list li{
  padding-left:18px;
  border-left:2px solid var(--line);
  transition:border-color .2s var(--ease);
}
.point-list li:hover{border-color:var(--brand);}
.point-list h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.point-list p{font-size:15px;color:var(--ink-soft);line-height:1.75;}

/* 步骤流程 */
.step-list{display:flex;flex-direction:column;gap:0;}
.step-list li{
  display:grid;
  grid-template-columns:46px minmax(0,1fr);
  gap:18px;
  padding:20px 0;
  border-bottom:1px dashed var(--line);
}
.step-list li:last-child{border-bottom:0;padding-bottom:0;}
.step-list li:first-child{padding-top:0;}
.step-no{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:50%;
  border:1px solid var(--line);
  font-size:15px;
  font-weight:800;
  color:var(--brand-deep);
  background:#fff;
  font-variant-numeric:tabular-nums;
}
.step-list h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.step-list p{font-size:15px;color:var(--ink-soft);line-height:1.75;}

/* 排查卡 */
.trouble-list{display:flex;flex-direction:column;gap:16px;}
.trouble-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 24px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.trouble-item:hover{
  transform:translateY(-3px);
  border-color:rgba(255,90,31,.3);
  box-shadow:var(--shadow-lg);
}
.trouble-item .trouble-top{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-bottom:10px;
}
.trouble-item h3{font-size:18px;font-weight:600;}
.trouble-item p{font-size:15px;color:var(--ink-soft);line-height:1.78;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:var(--pill);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  background:#F1EFEA;
  color:var(--ink-soft);
}
.tag-warn{background:rgba(217,63,11,.1);color:var(--brand-deep);}
.tag-ok{background:rgba(15,163,163,.12);color:#0B7F7F;}
.tag-dark{background:var(--ink);color:#fff;}

/* 设备卡片网格 */
.device-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.device-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.device-card:hover{
  transform:translateY(-3px);
  border-color:rgba(255,90,31,.3);
  box-shadow:var(--shadow-lg);
}
.device-card .device-head{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.device-card .device-head i{color:var(--brand-deep);font-size:18px;}
.device-card h3{font-size:18px;font-weight:600;}
.spec-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:10px 0;
  border-bottom:1px dotted var(--line);
  font-size:14px;
}
.spec-row:last-child{border-bottom:0;}
.spec-row .spec-key{color:var(--muted);}
.spec-row .spec-val{font-weight:700;font-variant-numeric:tabular-nums;}

/* FAQ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:600;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--muted);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq-item summary:hover{color:var(--brand-deep);}
.faq-item[open] summary{color:var(--brand-deep);}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--brand-deep);}
.faq-body{padding:0 0 22px;max-width:760px;}
.faq-body p{font-size:15px;line-height:1.78;color:var(--ink-soft);}
.faq-body p+p{margin-top:12px;}

/* 文章入口 */
.entry-list{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.entry-list li{border-bottom:1px solid var(--line);}
.entry-list a{
  display:flex;
  align-items:center;
  gap:18px;
  padding:20px 6px;
  transition:background .18s var(--ease),padding .18s var(--ease);
}
.entry-list a:hover{background:#fff;padding-left:16px;}
.entry-list .entry-idx{
  font-size:13px;
  font-weight:800;
  color:#B9B4AB;
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.entry-list .entry-main{flex:1 1 auto;min-width:0;}
.entry-list h3{font-size:16px;font-weight:600;margin-bottom:2px;}
.entry-list p{font-size:13px;color:var(--muted);}
.entry-list i{color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease);}
.entry-list a:hover i{transform:translateX(4px);color:var(--brand);}

/* 底部 CTA */
.cat-cta{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:#fff;
  border-radius:var(--radius);
  padding:48px 44px;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) auto;
  gap:32px;
  align-items:center;
  margin:56px 0 0;
}
.cat-cta::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:280px;
  height:280px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,31,.34),transparent 68%);
  pointer-events:none;
}
.cat-cta h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;margin-bottom:12px;position:relative;z-index:2;}
.cat-cta p{color:rgba(255,255,255,.72);font-size:15px;max-width:620px;position:relative;z-index:2;}
.cat-cta .cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:88px;
  border-top:1px solid var(--line);
  background:#FBFAF8;
  padding:56px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand .brandline{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.footer-brand .brandline .brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:11px;
  background:var(--ink);
  color:#fff;
  font-weight:800;
  font-size:14px;
}
.footer-brand .brandline strong{font-size:16px;font-weight:800;letter-spacing:-0.01em;}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.75;max-width:320px;}

.footer-col h3{
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--muted);
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  display:inline-block;
  font-size:14px;
  color:var(--ink-soft);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--brand-deep);transform:translateX(2px);}

.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
  letter-spacing:.02em;
}

/* 入场动效 */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-search{max-width:240px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:-1;}
  .cat-layout{grid-template-columns:1fr;gap:32px;}
  .anchor-nav{
    position:static;
    padding:14px;
    background:transparent;
    border:0;
    box-shadow:none;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .anchor-nav::-webkit-scrollbar{display:none;}
  .anchor-nav h2{margin-bottom:10px;padding-left:4px;}
  .anchor-nav ol{
    flex-direction:row;
    gap:10px;
    flex-wrap:nowrap;
  }
  .anchor-nav a{
    white-space:nowrap;
    border:1px solid var(--line);
    border-radius:var(--pill);
    background:#fff;
    padding:9px 16px;
  }
  .anchor-nav a.is-current{background:var(--ink);border-color:var(--ink);color:#fff;}
  .anchor-nav a.is-current .idx{color:rgba(255,255,255,.6);}
  .cat-cta{grid-template-columns:1fr;padding:38px 30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:768px){
  .nav-top-inner{height:64px;gap:12px;}
  .nav-search{display:none;}
  .brand-text em{display:none;}
  .brand-text strong{font-size:15px;}
  .brand-mark{width:38px;height:38px;font-size:14px;}
  .btn{padding:0 18px;min-height:44px;font-size:14px;}
  .nav-actions .btn span{display:none;}

  .cat-hero{padding:38px 0 46px;}
  h1{font-size:clamp(26px,7vw,34px);}
  .hero-lead{font-size:15.5px;}
  .hero-float{left:auto;right:12px;bottom:12px;padding:10px 14px;min-width:150px;}
  .hero-float .float-value{font-size:17px;}

  .cat-body{padding:44px 0 56px;}
  .section{padding:40px 0;}
  .section-head .num-badge{font-size:34px;}
  .section-head{margin-bottom:24px;}

  .split{grid-template-columns:1fr;gap:24px;}
  .split.is-reverse .split-media{order:0;}

  .device-grid{grid-template-columns:1fr;gap:16px;}
  .trouble-item{padding:18px 18px;}

  .cat-cta{padding:30px 22px;border-radius:12px;margin-top:40px;}
  .cta-actions .btn{width:100%;}

  .faq-item summary{font-size:15.5px;padding:18px 0;}

  .entry-list a{padding:16px 4px;gap:12px;}

  .site-footer{margin-top:60px;padding:40px 0 24px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{margin-top:30px;}
}

@media (max-width:520px){
  .container{padding:0 16px;}
  .nav-tabs-inner{padding:9px 16px;}
  .tab-pill{min-height:36px;padding:0 14px;font-size:13px;}
  .hero-facts{gap:14px 20px;}
  .hero-btns .btn{width:100%;}
  body{font-size:15px;}
  .step-list li{grid-template-columns:38px minmax(0,1fr);gap:14px;}
  .step-no{width:38px;height:38px;font-size:14px;}
}

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

/* roulang page: category2 */
:root{
  --brand:#FF5A1F;
  --brand-deep:#D93F0B;
  --brand-soft:rgba(255,90,31,.10);
  --ink:#14161A;
  --ink-2:#3A3E45;
  --accent:#0FA3A3;
  --bg:#F7F6F3;
  --line:#E8E5DF;
  --muted:#6B6F76;
  --white:#FFFFFF;
  --radius:14px;
  --radius-sm:10px;
  --pill:999px;
  --shadow:0 1px 2px rgba(20,22,26,.04), 0 8px 24px rgba(20,22,26,.06);
  --shadow-hover:0 12px 32px rgba(20,22,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-deep);}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,243,.94);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(20,22,26,.06);}
.nav-top-inner{display:flex;align-items:center;gap:24px;height:78px;transition:height .25s var(--ease);}
.site-header.is-scrolled .nav-top-inner{height:66px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:44px;height:44px;border-radius:12px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:16px;letter-spacing:.02em;
}
.brand-text strong{display:block;font-size:15px;font-weight:700;letter-spacing:-.01em;line-height:1.4;}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em;line-height:1.5;}
.nav-search{position:relative;flex:1 1 auto;max-width:320px;}
.nav-search i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:13px;pointer-events:none;}
.nav-search input{
  width:100%;height:42px;padding:0 14px 0 38px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;color:var(--ink);line-height:1;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search input::placeholder{color:#9AA0A6;}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.15);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-tabs-wrap{border-top:1px solid var(--line);}
.nav-tabs-inner{padding:10px 20px;}
.channel-tabs{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px 0;}
.channel-tabs::-webkit-scrollbar{display:none;}
.tab-pill{
  white-space:nowrap;padding:8px 18px;border-radius:var(--pill);font-size:14px;font-weight:500;
  color:var(--ink-2);border:1px solid var(--line);background:transparent;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
  min-height:38px;display:inline-flex;align-items:center;
}
.tab-pill:hover{border-color:rgba(255,90,31,.45);color:var(--brand-deep);}
.tab-pill.is-active{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600;}
.tab-pill.is-active:hover{color:#fff;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--pill);font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.btn i{font-size:12px;transition:transform .2s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.24);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:0 10px 24px rgba(217,63,11,.28);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink);background:#fff;}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:#000;color:#fff;}
.btn-pill{border-radius:var(--pill);}

/* ---------- Hero ---------- */
.category-hero{
  position:relative;overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:76px 0 68px;
}
.category-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(247,246,243,.97) 0%,rgba(247,246,243,.90) 48%,rgba(247,246,243,.68) 100%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center;}
.hero-copy{max-width:620px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--pill);
  background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge.is-accent{background:rgba(15,163,163,.12);color:#0B7C7C;}
h1{
  font-size:clamp(30px,4.6vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.02em;
  margin:18px 0 0;
}
.hero-sub{margin-top:18px;font-size:18px;color:var(--ink-2);max-width:560px;line-height:1.75;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.trust-row{display:flex;flex-wrap:wrap;gap:28px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line);}
.trust-item strong{display:block;font-size:15px;font-weight:700;letter-spacing:-.01em;}
.trust-item span{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.hero-figure{position:relative;}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow-hover);
  animation:floaty 6s ease-in-out infinite alternate;
}
.hero-figure::after{
  content:"";position:absolute;right:-14px;bottom:-14px;width:120px;height:120px;border-radius:var(--radius);
  border:1px solid var(--line);z-index:-1;
}
@keyframes floaty{from{transform:translateY(0);}to{transform:translateY(-10px);}}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section--tight{padding:76px 0;}
.section-head{max-width:760px;}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;letter-spacing:-.02em;line-height:1.25;margin-top:14px;}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:52px;}
.timeline::before{content:"";position:absolute;left:35px;top:14px;bottom:14px;width:1px;background:var(--line);}
.tl-item{position:relative;display:grid;grid-template-columns:72px minmax(0,1fr) 268px;gap:28px;padding-bottom:44px;}
.tl-item:last-child{padding-bottom:0;}
.tl-num{
  width:72px;height:72px;border-radius:50%;background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;font-size:20px;font-weight:800;letter-spacing:-.02em;
  transition:color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);z-index:1;
}
.tl-item:hover .tl-num{color:var(--brand);border-color:rgba(255,90,31,.45);box-shadow:0 8px 20px rgba(255,90,31,.14);}
.tl-body{padding-top:8px;}
.tl-body h3{font-size:20px;font-weight:600;letter-spacing:-.01em;}
.tl-body > p{margin-top:10px;color:var(--ink-2);font-size:15.5px;}
.tl-points{margin-top:14px;display:grid;gap:8px;}
.tl-points li{position:relative;padding-left:18px;font-size:14px;color:var(--muted);letter-spacing:.01em;}
.tl-points li::before{
  content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:2px;background:var(--brand);opacity:.85;
}
.tl-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.tl-item:hover .tl-media img{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(255,90,31,.3);}

/* ---------- Specs (dark) ---------- */
.spec-section{background:var(--ink);color:#fff;padding:96px 0;position:relative;overflow:hidden;}
.spec-section::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
}
.spec-section .container{position:relative;z-index:1;}
.spec-section h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;letter-spacing:-.02em;margin-top:14px;color:#fff;}
.spec-section .section-head p{color:rgba(255,255,255,.68);}
.spec-list{margin-top:44px;border-top:1px solid rgba(255,255,255,.14);}
.spec-row{
  display:grid;grid-template-columns:200px minmax(0,1fr);gap:26px;align-items:center;
  padding:24px 0;border-bottom:1px solid rgba(255,255,255,.14);
  transition:background .2s var(--ease);
}
.spec-row:hover{background:rgba(255,255,255,.03);}
.spec-platform strong{display:block;font-size:18px;font-weight:700;letter-spacing:-.01em;color:#fff;}
.spec-platform span{display:block;font-size:13px;color:rgba(255,255,255,.55);letter-spacing:.02em;margin-top:2px;}
.spec-kv{display:flex;flex-wrap:wrap;gap:14px 42px;}
.kv{min-width:132px;}
.kv span{display:block;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.5);text-transform:uppercase;}
.kv strong{display:block;font-size:15px;font-weight:600;color:#fff;margin-top:4px;font-variant-numeric:tabular-nums;}

/* ---------- Checks ---------- */
.check-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:56px;align-items:start;}
.check-aside{position:sticky;top:120px;}
.check-aside h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;letter-spacing:-.02em;margin-top:14px;}
.check-aside p{margin-top:14px;color:var(--ink-2);font-size:15px;}
.check-list{border-top:1px solid var(--line);}
.check-item{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid var(--line);}
.check-item .idx{
  flex:0 0 auto;font-size:30px;font-weight:800;line-height:1.1;color:var(--line);
  letter-spacing:-.02em;transition:color .2s var(--ease);font-variant-numeric:tabular-nums;
}
.check-item:hover .idx{color:var(--brand);}
.check-item h3{font-size:18px;font-weight:600;letter-spacing:-.01em;}
.check-item p{margin-top:8px;font-size:15px;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.faq-accordion{border:0;background:transparent;margin:44px 0 0;}
.faq-accordion .accordion-item{border:0;border-top:1px solid var(--line);background:transparent;}
.faq-accordion .accordion-item:last-child{border-bottom:1px solid var(--line);}
.faq-accordion .accordion-title{
  border:0;background:transparent;color:var(--ink);font-size:17px;font-weight:600;letter-spacing:-.01em;
  padding:22px 46px 22px 0;position:relative;transition:color .2s var(--ease);line-height:1.6;
}
.faq-accordion .accordion-title:hover{color:var(--brand-deep);}
.faq-accordion .accordion-title::before{
  content:"+";font-family:inherit;font-size:22px;font-weight:400;color:var(--brand);
  position:absolute;right:6px;left:auto;top:50%;transform:translateY(-50%);
  transition:transform .25s var(--ease);line-height:1;margin:0;
}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--brand-deep);}
.faq-accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);}
.faq-accordion .accordion-content{border:0;background:transparent;padding:0 60px 24px 0;color:var(--ink-2);font-size:15px;line-height:1.75;}
.faq-accordion .accordion-content p + p{margin-top:12px;}

/* ---------- CTA ---------- */
.cta-card{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;border-radius:var(--radius);
  padding:56px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:center;
}
.cta-card::after{
  content:"";position:absolute;inset:0;opacity:.4;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-card > *{position:relative;z-index:1;}
.cta-card h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.02em;color:#fff;line-height:1.3;}
.cta-card p{margin-top:14px;color:rgba(255,255,255,.7);font-size:15.5px;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.cta-card .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;}
.cta-card .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff;color:#fff;}

/* ---------- Link list ---------- */
.link-list{margin-top:36px;border-top:1px solid var(--line);}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px;border-bottom:1px solid var(--line);
  transition:padding .2s var(--ease),color .2s var(--ease);
}
.link-row h3{font-size:17px;font-weight:600;letter-spacing:-.01em;}
.link-row span{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.link-row i{color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease);}
.link-row:hover{padding-left:10px;}
.link-row:hover i{transform:translateX(4px);color:var(--brand);}

/* ---------- Footer ---------- */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:#F2F1ED;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--muted);max-width:320px;line-height:1.8;}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.02em;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--ink-2);display:inline-block;transition:color .18s var(--ease),transform .18s var(--ease);}
.footer-col a:hover{color:var(--brand-deep);transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--muted);letter-spacing:.02em;
}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:36px;}
  .hero-figure{max-width:560px;}
  .hero-figure::after{display:none;}
  .check-layout{grid-template-columns:1fr;gap:32px;}
  .check-aside{position:static;}
  .tl-item{grid-template-columns:72px minmax(0,1fr);}
  .tl-media{grid-column:2 / -1;margin-top:16px;max-width:420px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-card{grid-template-columns:1fr;padding:44px;}
}
@media (max-width:768px){
  body{font-size:15px;}
  .nav-top-inner{height:66px;gap:14px;}
  .nav-search{display:none;}
  .brand-text em{display:none;}
  .section{padding:60px 0;}
  .section--tight{padding:52px 0;}
  .spec-section{padding:60px 0;}
  .category-hero{padding:52px 0 44px;}
  .timeline::before{left:26px;}
  .tl-item{grid-template-columns:56px minmax(0,1fr);gap:18px;padding-bottom:34px;}
  .tl-num{width:56px;height:56px;font-size:16px;}
  .spec-row{grid-template-columns:1fr;gap:14px;padding:20px 0;}
  .spec-kv{gap:12px 28px;}
  .faq-accordion .accordion-content{padding-right:24px;}
  .cta-card{padding:32px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .site-footer{margin-top:60px;padding-top:48px;}
}
@media (max-width:520px){
  h1{font-size:28px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .trust-row{gap:18px;}
  .brand-text strong{font-size:14px;}
  .link-row{align-items:flex-start;flex-direction:column;gap:6px;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}