/* roulang page: index */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,0.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,0.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,0.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:ui-monospace,"SFMono-Regular","Space Grotesk","Inter",monospace;
  --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset,0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28),0 18px 40px -20px rgba(0,0,0,.9);
  --shadow-btn:0 10px 26px -10px rgba(255,91,46,.45);
  --sec-pad:96px;
  --wrap:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover;background:var(--bg-elev-2);}
a{color:var(--text-1);text-decoration:none;transition:color .18s var(--ease);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::-webkit-scrollbar{height:8px;width:8px;}
::-webkit-scrollbar-thumb{background:#242B31;border-radius:8px;}

.container{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:700;
  padding:14px 26px;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .25s var(--ease),color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#0B0E11;box-shadow:0 1px 0 rgba(255,255,255,.12) inset;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-btn);}
.btn-primary:hover .btn-ico{transform:translateX(2px);}
.btn-primary:active{transform:translateY(0);}
.btn-primary[disabled],.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-ghost{background:transparent;color:var(--text-1);border-color:rgba(237,241,242,.16);}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft);}
.btn-lg{padding:18px 40px;font-size:17px;}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--r-sm);}
.btn-ico{transition:transform .2s var(--ease);}
.tlink{
  color:var(--text-1);
  border-bottom:1px solid rgba(63,217,200,.45);
  padding-bottom:2px;
  font-weight:600;
  font-size:14px;
}
.tlink:hover{border-bottom-color:var(--accent);color:var(--accent);}

/* ---------- 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:0;
}
.badge-cat{background:var(--accent-soft);color:var(--accent);}
.badge-soft{background:var(--bg-elev-2);color:var(--text-2);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(10,12,14,.94);
  border-bottom-color:var(--line);
}
.header-top{
  height:68px;
  display:flex;
  align-items:center;
  gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:34px;height:34px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:linear-gradient(150deg,#141A1E,#0C1013);
  display:grid;place-items:center;
  flex-shrink:0;
}
.logo-mark svg{width:22px;height:22px;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0;}
.logo-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.16em;}
.header-search{
  flex:1;
  max-width:320px;
  margin-left:auto;
  position:relative;
}
.header-search input{
  width:100%;
  height:40px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--bg-elev-2);
  padding:0 14px 0 38px;
  color:var(--text-1);
  font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.header-search input::placeholder{color:var(--text-3);}
.header-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.14);}
.header-search .s-ico{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--text-3);pointer-events:none;}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;
  display:none;
  place-items:center;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--bg-elev-2);
  color:var(--text-2);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{border-color:var(--accent);color:var(--text-1);}
.icon-btn svg{width:18px;height:18px;}

.nav-channels{border-top:1px solid var(--line-soft);}
.channels-inner{
  height:48px;
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  height:48px;
  display:inline-flex;
  align-items:center;
  padding:0 14px;
  font-size:14.5px;
  font-weight:600;
  color:var(--text-2);
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.channel::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:0;
  height:2px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.channel:hover{color:var(--text-1);}
.channel.is-active{color:var(--text-1);}
.channel.is-active::after{transform:scaleX(1);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  padding:76px 0 88px;
  min-height:560px;
  border-bottom:1px solid var(--line-soft);
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(1px 1px at 18% 26%,rgba(217,228,232,.05) 50%,transparent 51%),
    radial-gradient(1px 1px at 63% 14%,rgba(217,228,232,.05) 50%,transparent 51%),
    radial-gradient(1px 1px at 42% 72%,rgba(217,228,232,.045) 50%,transparent 51%),
    radial-gradient(1px 1px at 84% 58%,rgba(217,228,232,.04) 50%,transparent 51%),
    radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);
  gap:56px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:20px;
}
.hero-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft);}
.hero h1{
  font-size:clamp(30px,5vw,54px);
  font-weight:800;
  line-height:1.10;
  letter-spacing:0;
}
.hero h1 .hl{color:var(--primary);}
.hero-sub{
  margin-top:18px;
  font-size:16px;
  line-height:1.8;
  color:var(--text-2);
  max-width:460px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-metrics{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin-top:36px;
  padding-top:22px;
  border-top:1px solid var(--line-soft);
}
.metric{
  padding:0 22px;
  border-left:1px solid var(--line);
}
.metric:first-child{padding-left:0;border-left:0;}
.metric b{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:16px;
  font-weight:700;
  color:var(--text-1);
}
.metric span{display:block;font-size:13px;color:var(--text-3);margin-top:2px;}

.hero-visual{position:relative;}
.hero-shot{
  position:relative;
  border-radius:var(--r-xl);
  border:1px solid var(--line);
  overflow:hidden;
  background:var(--bg-elev-1);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
}
.hero-shot .bg-layer{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
}
.hero-shot .bg-mask{position:absolute;inset:0;background:rgba(7,9,10,.52);}
.hero-shot img{
  position:absolute;
  inset:26px 26px 0;
  width:calc(100% - 52px);
  height:calc(100% - 26px);
  border-radius:var(--r-md) var(--r-md) 0 0;
  border:1px solid var(--line);
  border-bottom:0;
}
.win-dots{
  position:relative;
  z-index:2;
  display:flex;
  gap:6px;
  padding:12px 16px;
}
.win-dots i{width:9px;height:9px;border-radius:50%;background:#2B3339;display:block;}
.win-dots i:first-child{background:#39424A;}

.orbit-divider{display:block;width:100%;height:34px;color:var(--line);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec-pad) 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:clamp(23px,3vw,34px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:0;
}
.section-head .sub{font-size:14px;color:var(--text-2);margin-top:8px;}

/* ---------- 价值点 1 大 3 小 ---------- */
.value-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:24px;
}
.card{
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.value-lead{overflow:hidden;display:flex;flex-direction:column;}
.value-lead .media{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);}
.value-lead .media img{width:100%;height:100%;transition:transform .6s var(--ease);}
.value-lead:hover .media img{transform:scale(1.03);}
.value-lead .body{padding:24px;}
.value-lead h3{font-size:20px;font-weight:700;line-height:1.35;}
.value-lead p{font-size:15px;color:var(--text-2);margin-top:10px;line-height:1.8;}
.value-lead ul{margin-top:16px;display:grid;gap:10px;}
.value-lead li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-2);
}
.value-lead li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:7px;height:7px;
  background:var(--accent);
  border-radius:2px;
}
.value-stack{display:grid;gap:24px;align-content:start;}
.value-strip{
  display:flex;
  gap:18px;
  padding:20px 22px;
  align-items:flex-start;
}
.value-strip .idx{
  font-family:var(--font-num);
  font-size:28px;
  font-weight:800;
  color:var(--primary);
  line-height:1;
  flex-shrink:0;
}
.value-strip h3{font-size:17px;font-weight:700;line-height:1.35;}
.value-strip p{font-size:14px;color:var(--text-2);margin-top:6px;line-height:1.75;}

/* ---------- 轮播 ---------- */
.carousel{
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  background:var(--bg-elev-1);
  overflow:hidden;
}
.carousel-stage{position:relative;aspect-ratio:16/10;background:var(--bg-deep);}
.slide{
  position:absolute;
  inset:0;
  opacity:0;
  transition:opacity .45s var(--ease);
  pointer-events:none;
}
.slide.is-active{opacity:1;pointer-events:auto;}
.slide img{width:100%;height:100%;}
.slide-cap{
  position:absolute;
  left:24px;bottom:22px;
  background:rgba(7,9,10,.78);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:10px 16px;
  font-size:14px;
  color:var(--text-1);
}
.carousel-arrow{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:42px;height:42px;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(10,12,14,.8);
  color:var(--text-1);
  display:grid;place-items:center;
  z-index:3;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.carousel-arrow:hover{border-color:var(--accent);background:var(--accent-soft);}
.carousel-arrow svg{width:16px;height:16px;}
.carousel-arrow.prev{left:16px;}
.carousel-arrow.next{right:16px;}
.carousel-thumbs{
  display:flex;
  align-items:center;
  gap:12px;
  padding:16px;
  border-top:1px solid var(--line);
  overflow-x:auto;
  scrollbar-width:none;
}
.carousel-thumbs::-webkit-scrollbar{display:none;}
.thumb{
  flex:0 0 auto;
  width:126px;height:79px;
  border-radius:var(--r-sm);
  overflow:hidden;
  border:1px solid var(--line);
  padding:0;
  opacity:.62;
  transition:opacity .2s var(--ease),border-color .2s var(--ease);
}
.thumb img{width:100%;height:100%;}
.thumb:hover{opacity:1;}
.thumb.is-active{opacity:1;border-color:var(--primary);}
.carousel-dots{display:flex;gap:8px;margin-left:auto;padding-right:6px;}
.carousel-dots button{
  width:8px;height:8px;border-radius:50%;
  background:#2C343A;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.carousel-dots button.is-active{background:var(--primary);transform:scale(1.15);}

/* ---------- 系统要求 ---------- */
.spec-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:24px;
  align-items:start;
}
.platform-pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.pill{
  height:34px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--bg-elev-1);
  color:var(--text-2);
  font-size:13.5px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  transition:all .2s var(--ease);
}
.pill:hover{color:var(--text-1);border-color:#333C43;}
.pill.is-active{background:var(--accent-soft);border-color:transparent;color:var(--accent);}
.def-list{border-top:1px solid var(--line);}
.def-row{
  display:grid;
  grid-template-columns:132px minmax(0,1fr);
  gap:16px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  align-items:baseline;
}
.def-row dt{font-size:13px;color:var(--text-3);font-weight:500;}
.def-row dd{margin:0;font-size:15px;color:var(--text-1);}
.spec-note{
  margin-top:20px;
  padding:16px 18px;
  border:1px dashed rgba(237,241,242,.14);
  border-radius:var(--r-lg);
  font-size:13.5px;
  color:var(--text-2);
}
.spec-side{display:grid;gap:16px;}
.spec-side .card{padding:22px;}
.spec-side h3{font-size:17px;font-weight:700;}
.spec-side p{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.8;}
.spec-side .bar{
  height:6px;
  border-radius:999px;
  background:var(--bg-elev-2);
  overflow:hidden;
  margin-top:16px;
}
.spec-side .bar i{display:block;height:100%;border-radius:999px;background:var(--primary);}
.spec-side .bar.accent i{background:var(--accent);}

/* ---------- 评价墙 ---------- */
.review-wall{
  columns:3;
  column-gap:24px;
}
.review{
  break-inside:avoid;
  margin-bottom:24px;
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.review:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.review.lead{background:linear-gradient(180deg,#151B20,#12161A);}
.review.lead blockquote{font-size:22px;font-weight:600;line-height:1.6;}
.review blockquote{margin:0;font-size:15px;line-height:1.8;color:var(--text-1);}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{
  width:40px;height:40px;border-radius:50%;
  background:var(--bg-elev-2);
  border:1px solid var(--line);
  display:grid;place-items:center;
  font-size:15px;font-weight:700;color:var(--text-2);
  flex-shrink:0;
}
.review-top .who b{display:block;font-size:14px;font-weight:700;}
.review-top .who span{font-size:12px;color:var(--text-3);font-family:var(--font-num);}
.stars{display:flex;gap:3px;margin:12px 0 0;}
.stars svg{width:13px;height:13px;color:var(--primary);}
.stars svg.dim{opacity:.32;}

/* ---------- 下载组 ---------- */
.download-panel{
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:36px;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:36px;
  align-items:center;
}
.download-panel h2{font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.2;}
.download-panel .dp-sub{font-size:14.5px;color:var(--text-2);margin-top:12px;max-width:520px;}
.dl-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px;}
.plat-btn{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 16px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg-elev-2);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.plat-btn:hover{border-color:var(--accent);background:var(--accent-soft);}
.plat-btn svg{width:18px;height:18px;color:var(--text-2);}
.plat-btn b{display:block;font-size:14px;font-weight:600;}
.plat-btn span{display:block;font-size:11.5px;color:var(--text-3);font-family:var(--font-num);}
.qr-box{
  width:140px;height:140px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:var(--bg-elev-2);
  display:grid;
  place-items:center;
  gap:6px;
  padding:12px;
  text-align:center;
}
.qr-box .qr-img{width:88px;height:88px;background:#0E1316;border:1px solid var(--line);border-radius:var(--r-sm);display:grid;place-items:center;color:var(--text-3);font-size:11px;}
.qr-box small{font-size:11.5px;color:var(--text-3);}
.dl-footnote{font-size:13px;color:var(--text-3);margin-top:22px;padding-top:16px;border-top:1px solid var(--line-soft);}

/* ---------- 最新信息 ---------- */
.news-grid{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);
  gap:24px;
}
.news-lead{
  display:flex;
  flex-direction:column;
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.news-lead:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.news-lead .media{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);}
.news-lead .media img{width:100%;height:100%;transition:transform .6s var(--ease);}
.news-lead:hover .media img{transform:scale(1.03);}
.news-lead .body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-lead h3{font-size:20px;font-weight:700;line-height:1.4;}
.news-lead p{font-size:14.5px;color:var(--text-2);line-height:1.8;}
.news-list{display:grid;gap:14px;align-content:start;}
.news-item{
  display:flex;
  gap:16px;
  padding:14px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--bg-elev-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),padding-left .22s var(--ease);
}
.news-item:hover{border-color:#2E363D;transform:translateY(-2px);padding-left:16px;}
.news-item:hover h3{color:var(--primary);}
.news-item .thumb-sm{
  width:96px;height:64px;
  border-radius:var(--r-sm);
  overflow:hidden;
  flex-shrink:0;
  border:1px solid var(--line);
}
.news-item .thumb-sm img{width:100%;height:100%;transition:transform .6s var(--ease);}
.news-item:hover .thumb-sm img{transform:scale(1.03);}
.news-item .txt{min-width:0;display:flex;flex-direction:column;gap:6px;}
.news-item h3{
  font-size:16px;
  font-weight:600;
  line-height:1.45;
  transition:color .2s var(--ease);
}
.news-item .desc{
  font-size:13.5px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.meta-row{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
  margin-top:auto;
}
.meta-row .sep{width:1px;height:11px;background:var(--line);}
.meta-row .go{margin-left:auto;color:var(--text-3);transition:transform .2s var(--ease),color .2s var(--ease);}
.news-item:hover .go,.news-lead:hover .go{color:var(--primary);transform:translateX(2px);}
.meta-row .go svg{width:14px;height:14px;}
.empty-state{
  border:1px dashed rgba(237,241,242,.14);
  border-radius:var(--r-lg);
  padding:48px 24px;
  text-align:center;
  display:grid;
  gap:12px;
  justify-items:center;
}
.empty-state svg{width:40px;height:40px;color:var(--text-3);}
.empty-state p{font-size:15px;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:920px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:56px;
  padding:14px 0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text-1);
  position:relative;
  transition:color .2s var(--ease),padding-left .22s var(--ease);
}
.faq-q::before{
  content:"";
  position:absolute;
  left:0;top:12px;bottom:12px;
  width:3px;
  background:var(--primary);
  transform:scaleY(0);
  transition:transform .25s var(--ease);
}
.faq-item.is-open .faq-q{padding-left:16px;}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  width:22px;height:22px;
  flex-shrink:0;
  position:relative;
  transition:transform .25s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--text-2);
  border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:10px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:10px;width:2px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  display:none;
  padding:0 0 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  max-width:800px;
}
.faq-item.is-open .faq-a{display:block;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:var(--sec-pad);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:320px;}
.footer-col h3{font-size:13px;font-weight:700;color:var(--text-1);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0;
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom .links{display:flex;gap:18px;}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--text-1);}

/* ---------- 状态与骨架 ---------- */
.skeleton{
  background:var(--bg-elev-2);
  border-radius:var(--r-sm);
  position:relative;
  overflow:hidden;
}
.skeleton::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,transparent,rgba(237,241,242,.045),transparent);
  animation:shimmer 1.6s infinite;
}
@keyframes shimmer{0%{transform:translateX(-100%);}100%{transform:translateX(100%);}}
.form-error{font-size:13px;color:var(--err);margin-top:6px;}
.form-ok{font-size:13px;color:var(--ok);margin-bottom:12px;}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--wrap:1240px;}
  .review-wall{columns:3;}
}
@media (max-width:1199px){
  :root{--wrap:1140px;--sec-pad:88px;}
  .hero-grid{gap:40px;}
}
@media (max-width:991px){
  :root{--sec-pad:72px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px;}
  .hero-visual{order:-1;}
  .hero{min-height:auto;padding:48px 0 64px;}
  .value-grid{grid-template-columns:minmax(0,1fr);}
  .spec-wrap{grid-template-columns:minmax(0,1fr);}
  .news-grid{grid-template-columns:minmax(0,1fr);}
  .download-panel{grid-template-columns:minmax(0,1fr);padding:28px;}
  .review-wall{columns:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .carousel-arrow{display:none;}
}
@media (max-width:767px){
  :root{--sec-pad:56px;}
  .container{padding:0 20px;}
  .header-search{display:none;}
  .icon-btn{display:grid;}
  .hero h1{font-size:clamp(28px,7vw,38px);}
  .hero-sub{font-size:15px;}
  .hero-cta{width:100%;}
  .hero-cta .btn{flex:1 1 auto;justify-content:center;}
  .metric{padding:0 14px;}
  .metric b{font-size:15px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .review-wall{columns:1;}
  .download-panel{padding:22px;}
  .qr-box{width:100%;height:auto;padding:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .def-row{grid-template-columns:110px minmax(0,1fr);}
}
@media (max-width:559px){
  .container{padding:0 16px;}
  .hero-metrics{gap:12px 0;}
  .metric{width:50%;padding:0 12px;}
  .metric:nth-child(odd){padding-left:0;border-left:0;}
  .thumb{width:104px;height:65px;}
  .btn{padding:12px 20px;}
  .btn-lg{padding:16px 24px;font-size:16px;}
  .news-item .thumb-sm{width:80px;height:54px;}
}

/* roulang page: article */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,.08);
  --line-strong:rgba(237,241,242,.16);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset, 0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28), 0 18px 40px -20px rgba(0,0,0,.9);
  --shadow-btn:0 10px 26px -10px rgba(255,91,46,.45);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body{
  margin:0;background:var(--bg-base);color:var(--text-1);
  font-family:var(--font-sans);font-size:16px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-md);font-size:15px;font-weight:700;line-height:1;
  border:1px solid transparent;transition:transform .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease),color .24s var(--ease);
  white-space:nowrap;
}
.btn-ico{transition:transform .24s var(--ease)}
.btn:hover .btn-ico{transform:translateX(2px)}
.btn-primary{background:var(--primary);color:#0B0E11}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-btn)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary[disabled],.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--text-1)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:18px 40px;font-size:17px}
.link-u{color:var(--text-1);border-bottom:1px solid rgba(63,217,200,.45);padding-bottom:1px;transition:border-color .2s var(--ease),color .2s var(--ease)}
.link-u:hover{border-color:var(--accent);color:var(--accent)}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:100;background:transparent;transition:background-color .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease)}
.site-header.is-scrolled{background:rgba(10,12,14,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.header-top{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg-elev-1)}
.logo-mark svg{width:20px;height:20px}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0}
.logo-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.18em;font-weight:600}
.header-search{position:relative;flex:1;max-width:320px;margin-left:8px}
.header-search .s-ico{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--text-3)}
.header-search input{
  width:100%;height:40px;padding:0 14px 0 36px;border-radius:var(--r-sm);
  background:var(--bg-elev-2);border:1px solid var(--line);color:var(--text-1);font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.header-search input::placeholder{color:var(--text-3)}
.header-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.icon-btn{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg-elev-2);color:var(--text-2);transition:color .2s var(--ease),border-color .2s var(--ease)}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--text-1);border-color:var(--accent)}
.nav-channels{border-top:1px solid var(--line-soft);position:relative}
.site-header.is-scrolled .nav-channels{border-top-color:transparent}
.channels-inner{display:flex;align-items:center;gap:6px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channels-inner::-webkit-scrollbar{display:none}
.channel{position:relative;display:inline-flex;align-items:center;height:48px;padding:0 14px;font-size:14.5px;font-weight:600;color:var(--text-2);white-space:nowrap;transition:color .12s var(--ease)}
.channel::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:transparent;border-radius:2px;transition:background-color .2s var(--ease)}
.channel:hover{color:var(--text-1)}
.channel.is-active{color:var(--text-1)}
.channel.is-active::after{background:var(--primary)}
.mobile-search{display:none}

/* ============ 阅读进度 ============ */
.progress-track{position:fixed;top:0;left:0;right:0;height:2px;background:transparent;z-index:200;pointer-events:none}
.progress-track span{display:block;height:100%;width:0;background:var(--primary);transition:width .1s linear}

/* ============ 文章头 ============ */
.article-head-wrap{padding:40px 0 0;position:relative}
.article-head-wrap::before{content:"";position:absolute;inset:0 0 auto;height:320px;background:radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);pointer-events:none}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--text-3);position:relative}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60vw}
.article-head{position:relative;padding:22px 0 0;max-width:900px}
.article-head h1{font-size:clamp(28px,4.4vw,50px);font-weight:800;line-height:1.14;letter-spacing:0}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px;font-size:13px;font-weight:500;color:var(--text-3)}
.meta-row .dot{width:1px;height:12px;background:var(--line)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1}
.badge-cat{background:var(--accent-soft);color:var(--accent);border:1px solid rgba(63,217,200,.22)}
.badge-soft{background:var(--bg-elev-2);color:var(--text-2);border:1px solid var(--line)}

/* ============ 布局 ============ */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start;padding:36px 0 0}
.article-main{min-width:0}
.article-body{
  max-width:800px;font-size:17.5px;line-height:1.9;color:#DCE3E5;letter-spacing:.01em;
  background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:36px clamp(20px,3vw,40px);
}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.5em}
.article-body h2{
  position:relative;margin:44px 0 16px;padding-left:16px;
  font-size:clamp(20px,2.4vw,24px);font-weight:800;line-height:1.32;color:var(--text-1);letter-spacing:0;scroll-margin-top:150px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.5em;width:3px;height:16px;background:var(--primary);border-radius:2px}
.article-body h3{margin:32px 0 12px;font-size:19px;font-weight:700;line-height:1.4;color:var(--text-1);scroll-margin-top:150px}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:700;color:var(--text-1)}
.article-body ul,.article-body ol{margin:0 0 1.5em;padding-left:2px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;background:var(--accent);border-radius:2px;opacity:.9}
.article-body ol{list-style:none;counter-reset:olc}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:10px;counter-increment:olc}
.article-body ol li::before{content:counter(olc) ".";position:absolute;left:0;top:0;color:var(--accent);font-weight:700;font-family:var(--font-num)}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--accent);background:var(--accent-soft);
  border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:17px;color:#DCE3E5;line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{width:100%;height:auto;border-radius:var(--r-md);margin:26px 0 10px;background:var(--bg-elev-2)}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-bottom:26px}
.article-body a{color:var(--text-1);border-bottom:1px solid rgba(63,217,200,.45);transition:border-color .2s var(--ease),color .2s var(--ease)}
.article-body a:hover{color:var(--accent);border-color:var(--accent)}
.article-body strong{color:#FFFFFF;font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body pre{
  margin:24px 0;padding:18px 20px;background:var(--bg-deep);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow-x:auto;font-family:var(--font-num);font-size:15px;line-height:1.7;color:#CFD8DB;
}
.article-body code{font-family:var(--font-num);font-size:.92em;background:var(--bg-elev-2);border:1px solid var(--line);border-radius:4px;padding:1px 6px}
.article-body pre code{background:none;border:0;padding:0}
.table-wrap{overflow-x:auto;margin:26px 0;border:1px solid var(--line);border-radius:var(--r-sm)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
.article-body th{background:var(--bg-elev-2);font-weight:700;color:var(--text-1);text-align:left}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body tr:last-child td{border-bottom:0}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:148px;display:flex;flex-direction:column;gap:16px}
.side-card{background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-card)}
.side-card h2{font-size:14px;font-weight:700;color:var(--text-1);letter-spacing:.02em;display:flex;align-items:center;justify-content:space-between;gap:10px}
.side-card h2 .side-ico{color:var(--accent);width:16px;height:16px}
.toc-list{margin-top:14px;display:flex;flex-direction:column;gap:2px;max-height:46vh;overflow-y:auto}
.toc-list a{display:block;padding:7px 10px;font-size:14px;line-height:1.5;color:var(--text-2);border-left:2px solid transparent;border-radius:0 var(--r-sm) var(--r-sm) 0;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
.toc-list a:hover{color:var(--text-1);background:var(--bg-elev-2)}
.toc-list a.lv3{padding-left:22px;font-size:13.5px;color:var(--text-3)}
.toc-list a.is-current{color:var(--text-1);border-left-color:var(--primary);background:var(--primary-soft)}
.toc-toggle{display:none}
.toc-empty{font-size:13px;color:var(--text-3);margin-top:12px}
.side-links{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.side-link{display:flex;align-items:center;gap:12px;padding:8px;border-radius:var(--r-sm);border:1px solid transparent;transition:border-color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease)}
.side-link:hover{border-color:var(--line);background:var(--bg-elev-2);transform:translateY(-2px)}
.side-link img{width:72px;height:48px;object-fit:cover;border-radius:6px;background:var(--bg-elev-2);flex-shrink:0}
.side-link b{display:block;font-size:14px;font-weight:600;line-height:1.45;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-link:hover b{color:var(--primary)}
.side-link span{font-size:12px;color:var(--text-3);font-family:var(--font-num)}
.side-back{display:flex;flex-wrap:wrap;gap:14px;font-size:14px;margin-top:6px}

/* ============ 上下篇 ============ */
.post-nav{max-width:800px;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.post-nav-item{
  display:flex;flex-direction:column;gap:8px;padding:18px 20px;background:var(--bg-elev-1);
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-card);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.post-nav-item:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-2px);border-color:transparent}
.post-nav-item span{font-size:12px;font-weight:600;color:var(--text-3);letter-spacing:.06em}
.post-nav-item b{font-size:15.5px;font-weight:600;line-height:1.5;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-nav-item:hover b{color:var(--primary)}
.post-nav-item.next{text-align:right;align-items:flex-end}

/* ============ 相关阅读 ============ */
.related-section{padding:72px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.2;letter-spacing:0}
.section-head .more{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px;transition:color .2s var(--ease)}
.section-head .more:hover{color:var(--primary)}
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.rel-card{
  display:flex;flex-direction:column;background:var(--bg-elev-1);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-card);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.rel-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-2px);border-color:transparent}
.rel-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-elev-2)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:16.5px;font-weight:600;line-height:1.5;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card:hover h3{color:var(--primary)}
.rel-body p{font-size:13.5px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--text-3);font-family:var(--font-num)}

/* ============ CTA ============ */
.cta-band{padding:72px 0 0}
.cta-inner{
  position:relative;overflow:hidden;border-radius:var(--r-xl);border:1px solid var(--line);
  background-image:linear-gradient(rgba(7,9,10,.78),rgba(7,9,10,.9)),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;padding:clamp(32px,5vw,56px);
  display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:center;
}
.cta-inner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(217,228,232,.9) 1px,transparent 1px);
  background-size:120px 90px;opacity:.05;
}
.cta-copy{position:relative;z-index:1}
.cta-copy h2{font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.22;letter-spacing:0}
.cta-copy p{margin-top:14px;font-size:15.5px;color:var(--text-2);line-height:1.85;max-width:520px}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* ============ 空态 ============ */
.empty-state{
  border:1px dashed rgba(237,241,242,.14);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:40px;height:40px;color:var(--text-3)}
.empty-state p{font-size:15px;color:var(--text-2)}
.empty-state .empty-title{font-size:17px;font-weight:700;color:var(--text-1)}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;background:var(--bg-deep);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:56px 0 40px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-2);max-width:300px}
.footer-col h3{font-size:13px;font-weight:700;color:var(--text-1);letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);font-family:var(--font-num)}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;font-family:var(--font-sans)}
.footer-bottom .links a{color:var(--text-3);transition:color .2s var(--ease)}
.footer-bottom .links a:hover{color:var(--accent)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);animation:reveal .32s var(--ease) forwards}
@keyframes reveal{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (min-width:1440px){.container{max-width:1240px}}
@media (max-width:1199px){
  .article-layout{grid-template-columns:1fr;gap:20px}
  .article-side{position:static;top:auto}
  .article-body{max-width:none}
  .post-nav{max-width:none}
  .rel-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .cta-inner{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:991px){
  .header-search{max-width:220px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .header-search{display:none}
  .icon-btn{display:inline-flex}
  .mobile-search{display:none;padding:0 0 14px}
  .mobile-search.is-open{display:block}
  .mobile-search input{width:100%;height:44px;padding:0 14px;border-radius:var(--r-sm);background:var(--bg-elev-2);border:1px solid var(--line);color:var(--text-1);font-size:14px}
  .mobile-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16)}
  .channels-inner{mask-image:linear-gradient(90deg,transparent 0,#000 24px,#000 calc(100% - 24px),transparent 100%)}
  .article-head-wrap{padding-top:28px}
  .article-body{font-size:16.5px;padding:26px 20px;line-height:1.9}
  .article-body h2{scroll-margin-top:120px}
  .article-layout{padding-top:26px}
  .toc-toggle{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--text-2);border:1px solid var(--line);border-radius:var(--r-sm);padding:8px 14px;background:var(--bg-elev-2)}
  .toc-toggle svg{width:14px;height:14px;transition:transform .24s var(--ease)}
  .side-card.is-collapsed .toc-list{display:none}
  .side-card.is-collapsed .toc-toggle svg{transform:rotate(-90deg)}
  .toc-list{max-height:none}
  .post-nav{grid-template-columns:1fr}
  .post-nav-item.next{text-align:left;align-items:flex-start}
  .rel-grid{grid-template-columns:1fr}
  .related-section{padding-top:56px}
  .cta-band{padding-top:56px}
  .cta-inner{padding:28px 22px}
  .site-footer{margin-top:56px}
  .footer-grid{padding:40px 0 28px;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .meta-row .hide-sm{display:none}
  .meta-row .dot.hide-sm{display:none}
}
@media (max-width:559px){
  .container{padding:0 16px}
  .article-body{font-size:16px;padding:22px 16px}
  .btn{padding:12px 20px}
  .btn-lg{padding:16px 26px;font-size:16px}
  .footer-grid{grid-template-columns:1fr}
  .cta-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,0.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,0.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,0.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset,0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28),0 18px 40px -20px rgba(0,0,0,.9);
  --container:1200px;
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:132px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-base);color:var(--text-1);
  font-family:var(--font-sans);font-size:15px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:0}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,12,14,.72);
  backdrop-filter:blur(6px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease;
}
.site-header.is-stuck{background:rgba(10,12,14,.94);border-bottom-color:var(--line)}
.header-top{
  display:flex;align-items:center;gap:20px;height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg-elev-1)}
.logo-mark svg{width:20px;height:20px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0}
.logo-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.16em}
.header-search{
  position:relative;display:flex;align-items:center;flex:1 1 auto;max-width:320px;
  height:40px;background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search .s-ico{width:16px;height:16px;color:var(--text-3);margin:0 10px 0 12px;flex:0 0 auto}
.header-search input{
  flex:1 1 auto;height:100%;border:0;background:transparent;padding:0 12px 0 0;font-size:14px;outline:none;
}
.header-search input::placeholder{color:var(--text-3)}
.header-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;
  background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-sm);cursor:pointer;
}
.icon-btn svg{width:18px;height:18px;color:var(--text-2)}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-md);font-weight:700;font-size:15px;line-height:1;
  padding:14px 26px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
}
.btn-sm{padding:11px 18px;font-size:14px}
.btn-lg{padding:18px 40px;font-size:17px}
.btn-primary{background:var(--primary);color:#0B0E11}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 26px -10px rgba(255,91,46,.45)}
.btn-primary:active{transform:translateY(0)}
.btn-primary[disabled],.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:transparent;border-color:rgba(237,241,242,.16);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft)}
.btn .btn-ico{transition:transform .2s ease}
.btn:hover .btn-ico{transform:translateX(2px)}

.nav-channels{border-top:1px solid var(--line-soft);position:relative}
.channels-inner{display:flex;align-items:center;gap:6px;height:48px;overflow-x:auto;scrollbar-width:none}
.channels-inner::-webkit-scrollbar{display:none}
.channel{
  position:relative;flex:0 0 auto;padding:6px 12px;font-size:14px;font-weight:600;color:var(--text-2);
  border-radius:var(--r-sm);transition:color .12s ease,background-color .12s ease;
}
.channel:hover{color:var(--text-1)}
.channel.is-active{color:var(--text-1);background:var(--primary-soft)}
.channel.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-12px;height:2px;background:var(--primary);border-radius:2px;
}

/* ============ breadcrumb ============ */
.breadcrumb{margin-bottom:18px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb [aria-current]{color:var(--text-2)}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;padding:44px 0 72px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-scrim{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(10,12,14,.62),rgba(10,12,14,.94) 78%),
    radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,5vw,48px);font-weight:800;line-height:1.12;letter-spacing:0}
.hero-sub{margin-top:14px;color:var(--text-2);font-size:16px;max-width:30em}
.plat-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.plat-tab{
  padding:8px 15px;border:1px solid var(--line);background:var(--bg-elev-2);border-radius:999px;
  color:var(--text-2);font-size:14px;font-weight:600;cursor:pointer;transition:all .18s ease;
}
.plat-tab:hover{color:var(--text-1);border-color:rgba(237,241,242,.18)}
.plat-tab.is-active{background:var(--accent-soft);border-color:rgba(63,217,200,.35);color:var(--accent)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:0;margin-top:28px;font-size:13px;color:var(--text-3)}
.hero-metrics li{padding:0 16px;border-left:1px solid var(--line);line-height:1.5}
.hero-metrics li:first-child{padding-left:0;border-left:0}
.hero-metrics b{display:block;color:var(--text-1);font-size:14px;font-weight:700;font-family:var(--font-num);font-variant-numeric:tabular-nums}
.hero-shot{position:relative}
.shot-window{
  position:relative;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  background:var(--bg-elev-1);box-shadow:var(--shadow-card);
  padding-top:34px;
}
.shot-window img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-dots{position:absolute;top:12px;left:16px;display:flex;gap:6px}
.shot-dots i{width:9px;height:9px;border-radius:50%;background:var(--line);display:block}
.shot-dots i:first-child{background:var(--primary)}
.hero-arc{position:absolute;left:0;right:0;bottom:-1px;height:60px;pointer-events:none;z-index:1;opacity:.7}

/* ============ section base ============ */
.section{padding:96px 0}
.section-alt{background:var(--bg-deep);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.2;letter-spacing:0}
.section-head p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:56em}
.text-link{color:var(--text-1);font-size:14px;font-weight:600;border-bottom:1px solid rgba(63,217,200,.45);padding-bottom:2px}
.text-link:hover{border-bottom-color:var(--accent);color:var(--accent)}

/* ============ platform cards ============ */
.plat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.plat-card{
  background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-card);transition:box-shadow .25s ease,transform .25s ease;
}
.plat-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-2px)}
.plat-card-top{display:flex;align-items:center;gap:14px}
.plat-ico{
  width:44px;height:44px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg-elev-2);color:var(--accent);
}
.plat-ico svg{width:22px;height:22px}
.plat-name{font-size:19px;font-weight:700;line-height:1.35}
.plat-desc{font-size:13px;color:var(--text-3)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--bg-elev-2);color:var(--text-2);
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.plat-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.plat-meta dt{font-size:12px;color:var(--text-3);font-weight:500}
.plat-meta dd{margin:4px 0 0;font-size:15px;font-weight:700;font-family:var(--font-num);font-variant-numeric:tabular-nums}
.plat-card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}

/* ============ system requirements ============ */
.req-panel{margin-top:8px}
.req-panel[hidden]{display:none}
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.req-box{background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px}
.req-box h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:16px}
.req-box h3 span{width:8px;height:8px;border-radius:2px;display:inline-block;background:var(--text-3)}
.req-box.is-rec h3 span{background:var(--primary)}
.req-list li{
  display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:baseline;
  padding:12px 0;border-top:1px solid var(--line);
}
.req-list li:first-child{border-top:0;padding-top:0}
.req-list dt,.req-list .k{font-size:13px;color:var(--text-3)}
.req-list .v{font-size:15px;color:var(--text-1);font-family:var(--font-num);font-variant-numeric:tabular-nums}
.req-list .v.plain{font-family:var(--font-sans)}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;padding-top:22px;border-top:1px solid var(--line)}
.step::before{
  content:"";position:absolute;top:-1px;left:0;width:36px;height:2px;background:var(--primary);
}
.step-num{font-family:var(--font-num);font-size:24px;font-weight:800;color:var(--primary);line-height:1;font-variant-numeric:tabular-nums}
.step h3{margin-top:12px;font-size:17px;font-weight:700}
.step p{margin-top:8px;font-size:14px;color:var(--text-2)}

/* ============ download band ============ */
.dl-band{
  background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:36px;display:grid;grid-template-columns:1fr 168px;gap:36px;align-items:center;
  position:relative;overflow:hidden;
}
.dl-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 240px at 12% 0%,rgba(255,91,46,.10),transparent 70%);
}
.dl-band-inner{position:relative;z-index:1}
.dl-band h2{font-size:clamp(23px,3vw,32px);font-weight:800;line-height:1.2}
.dl-band p.desc{margin-top:10px;color:var(--text-2);font-size:15px;max-width:44em}
.dl-main{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:24px}
.dl-alt{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.dl-alt .btn-ghost{justify-content:flex-start;text-align:left;padding:12px 18px}
.dl-alt .btn-ghost small{display:block;font-size:12px;font-weight:500;color:var(--text-3);font-family:var(--font-num)}
.dl-alt .btn-ghost i{display:flex;flex-direction:column;font-style:normal;line-height:1.35}
.dl-note{margin-top:20px;font-size:13px;color:var(--text-3)}
.qr-wrap{position:relative;z-index:1;text-align:center}
.qr-box{
  width:140px;height:140px;margin:0 auto;background:#EDF1F2;border-radius:var(--r-sm);
  padding:8px;border:1px solid var(--line);
}
.qr-box svg{width:100%;height:100%;display:block}
.qr-wrap p{margin-top:10px;font-size:13px;color:var(--text-3)}

/* ============ faq ============ */
.faq{max-width:880px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:18px 0 18px 18px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1);position:relative;transition:color .18s ease;
}
.faq-trigger::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--primary);opacity:0;transition:opacity .2s ease;
}
.faq-trigger:hover{color:var(--primary)}
.faq-item.is-open .faq-trigger::before{opacity:1}
.faq-sign{position:relative;width:16px;height:16px;flex:0 0 auto;transition:transform .25s ease}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--text-2);border-radius:2px;
}
.faq-sign::before{left:0;right:0;top:7px;height:2px}
.faq-sign::after{top:0;bottom:0;left:7px;width:2px}
.faq-item.is-open .faq-sign{transform:rotate(45deg)}
.faq-item.is-open .faq-sign::before,.faq-item.is-open .faq-sign::after{background:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .32s cubic-bezier(.22,.61,.36,1)}
.faq-answer p{padding:0 0 22px 18px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:46em}

/* ============ footer ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:26em}
.footer-col h3{font-size:13px;font-weight:700;color:var(--text-1);letter-spacing:.04em;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:48px;padding:20px 0 28px;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(--text-3);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--accent)}

/* ============ motion ============ */
.reveal{opacity:0;transform:translateY(12px);animation:rise .32s cubic-bezier(.22,.61,.36,1) forwards}
.reveal:nth-child(2){animation-delay:.06s}
.reveal:nth-child(3){animation-delay:.12s}
.reveal:nth-child(4){animation-delay:.18s}
@keyframes rise{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* ============ responsive ============ */
@media (min-width:1440px){:root{--container:1240px}}
@media (max-width:1439px) and (min-width:1200px){:root{--container:1140px}}
@media (max-width:1199px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-shot{order:-1}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .header-search{max-width:none}
  .plat-grid{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .dl-band{grid-template-columns:1fr;padding:28px}
  .qr-wrap{text-align:left}
  .qr-box{margin:0}
  .nav-channels::after{
    content:"";position:absolute;top:0;right:0;bottom:0;width:32px;pointer-events:none;
    background:linear-gradient(90deg,transparent,rgba(10,12,14,.92));
  }
}
@media (max-width:768px){
  .header-search{display:none}
  .header-search.is-open{
    display:flex;position:absolute;left:16px;right:16px;top:14px;z-index:5;max-width:none;
  }
  .icon-btn{display:inline-flex}
  .steps{grid-template-columns:1fr}
  .plat-meta{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:560px){
  body{font-size:15px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .hero{padding:28px 0 56px}
  .hero h1{font-size:28px}
  .hero-metrics li{padding:0 12px}
  .btn{padding:13px 20px}
  .btn-lg{padding:16px 24px;font-size:16px}
  .hero-cta .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start}
  .plat-meta{grid-template-columns:1fr}
  .req-list li{grid-template-columns:1fr;gap:4px}
  .dl-alt{flex-direction:column}
  .dl-alt .btn-ghost{width:100%}
  .footer-grid{grid-template-columns:1fr}
}

/* roulang page: category3 */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset, 0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28), 0 18px 40px -20px rgba(0,0,0,.9);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --container:1200px;
  --gap:24px;
  --section-y:96px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-padding-top:132px;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
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;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
::selection{background:var(--primary-soft);color:var(--text-1);}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--r-md);
  padding:14px 26px;
  font-size:15px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  transition:transform .18s cubic-bezier(.22,.61,.36,1),background-color .18s,border-color .18s,box-shadow .18s,color .18s;
  white-space:nowrap;
}
.btn:active{transform:translateY(0);}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}
.btn-primary{background:var(--primary);color:#0B0E11;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 26px -10px rgba(255,91,46,.45);}
.btn-primary:hover .btn-ico{transform:translateX(2px);}
.btn-ghost{background:transparent;border-color:rgba(237,241,242,.16);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-lg{padding:18px 40px;font-size:17px;}
.btn-ico{transition:transform .18s cubic-bezier(.22,.61,.36,1);}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
  border-bottom:1px solid rgba(63,217,200,.45);
  padding-bottom:2px;
  transition:color .18s,border-color .18s;
}
.link-arrow:hover{color:var(--primary);border-bottom-color:var(--accent);}
.link-arrow:hover svg{transform:translateX(2px);}
.link-arrow svg{transition:transform .18s cubic-bezier(.22,.61,.36,1);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(10,12,14,.94);
  border-bottom-color:var(--line);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.header-top{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:28px;height:28px;display:inline-flex;}
.logo-mark svg{width:100%;height:100%;}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0;}
.logo-text em{
  font-style:normal;
  font-size:10px;
  letter-spacing:.24em;
  color:var(--text-3);
  font-weight:600;
}
.header-search{
  position:relative;
  flex:1 1 auto;
  max-width:320px;
  margin-left:auto;
}
.header-search .s-ico{
  position:absolute;
  left:12px;
  top:50%;
  transform:translateY(-50%);
  width:16px;
  height:16px;
  color:var(--text-3);
  pointer-events:none;
}
.header-search input{
  width:100%;
  height:40px;
  padding:0 14px 0 36px;
  background:var(--bg-elev-2);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  font-size:14px;
  color:var(--text-1);
  transition:border-color .18s,box-shadow .18s;
}
.header-search input::placeholder{color:var(--text-3);}
.header-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(63,217,200,.16);}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  background:var(--bg-elev-2);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-2);
  cursor:pointer;
  transition:color .18s,border-color .18s;
}
.icon-btn:hover{color:var(--text-1);border-color:var(--accent);}
.icon-btn svg{width:18px;height:18px;}

.nav-channels{
  position:relative;
  border-top:1px solid var(--line-soft);
}
.channels-inner{
  display:flex;
  align-items:center;
  gap:6px;
  height:48px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:100%;
  padding:0 14px;
  font-size:14.5px;
  font-weight:600;
  color:var(--text-2);
  white-space:nowrap;
  transition:color .12s ease;
}
.channel:hover{color:var(--text-1);}
.channel.is-active{color:var(--text-1);}
.channel.is-active::after{
  content:"";
  position:absolute;
  left:10px;right:10px;bottom:0;
  height:2px;
  background:var(--primary);
  border-radius:2px;
}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  padding:44px 0 56px;
  background-color:var(--bg-base);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center 30%;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,12,14,.72) 0%,rgba(10,12,14,.88) 62%,var(--bg-base) 100%);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3);transition:color .18s;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:#3A4449;}
.breadcrumb .current{color:var(--text-2);}
.page-hero h1{
  font-size:clamp(30px,5vw,54px);
  font-weight:800;
  line-height:1.1;
  letter-spacing:0;
  max-width:16em;
}
.page-hero h1 .accent-dot{color:var(--primary);}
.page-hero-sub{
  margin-top:16px;
  max-width:640px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.8;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:0 28px;
  margin-top:28px;
}
.hero-stats li{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding-left:20px;
  position:relative;
}
.hero-stats li::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:1px;height:30px;
  background:var(--line);
}
.hero-stats .k{font-size:13px;font-weight:500;color:var(--text-3);}
.hero-stats .v{
  font-family:var(--font-num);
  font-size:17px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--text-1);
}
.hero-stats .v.accent{color:var(--accent);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--section-y) 0;}
.section-tight{padding-top:0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:clamp(23px,3vw,34px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:0;
}
.section-head p{
  margin-top:10px;
  font-size:15px;
  color:var(--text-2);
  max-width:46em;
}

/* ---------- 交替图文行 ---------- */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:center;
  gap:64px;
}
.feature-row + .feature-row{margin-top:72px;}
.feature-media{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--bg-elev-2);
  box-shadow:var(--shadow-card);
}
.feature-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .6s cubic-bezier(.22,.61,.36,1);
}
.feature-media:hover img{transform:scale(1.03);}
.feature-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,12,14,0) 48%,rgba(10,12,14,.55) 100%);
  pointer-events:none;
}
.feature-row.is-reverse .feature-media{order:2;}
.feature-index{
  font-family:var(--font-num);
  font-size:36px;
  font-weight:800;
  line-height:1;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.feature-body h2{
  margin-top:14px;
  font-size:clamp(22px,2.4vw,30px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:0;
}
.feature-body > p{
  margin-top:14px;
  font-size:15.5px;
  color:var(--text-2);
  line-height:1.8;
  max-width:34em;
}
.bullet-list{
  margin-top:20px;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.bullet-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.75;
}
.bullet-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:8px;height:8px;
  background:var(--accent-soft);
  border:1px solid var(--accent);
  border-radius:2px;
}
.bullet-list li strong{color:var(--text-1);font-weight:700;}
.feature-body .link-arrow{margin-top:24px;}

/* ---------- 功能清单 ---------- */
.checklist-section{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  column-gap:56px;
  border-top:1px solid var(--line);
}
.check-grid li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--text-2);
}
.check-grid li strong{color:var(--text-1);font-weight:700;}
.check-mark{
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:4px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--accent-soft);
  color:var(--accent);
}
.check-mark svg{width:12px;height:12px;}

/* ---------- 截图带 ---------- */
.gallery-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 24px 20px;
  max-width:var(--container);
  margin:0 auto;
  scrollbar-width:thin;
}
.gallery-track::-webkit-scrollbar{height:6px;}
.gallery-track::-webkit-scrollbar-track{background:var(--bg-elev-1);border-radius:6px;}
.gallery-track::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px;}
.gallery-track::-webkit-scrollbar-thumb:hover{background:#333C42;}
.gallery-item{
  flex:0 0 320px;
  margin:0;
  scroll-snap-align:start;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--bg-elev-1);
  overflow:hidden;
  transition:border-color .18s,box-shadow .18s,transform .18s;
}
.gallery-item:hover{border-color:rgba(255,91,46,.35);box-shadow:var(--shadow-card-hover);transform:translateY(-2px);}
.gallery-item img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--bg-elev-2);}
.gallery-item figcaption{
  padding:12px 16px 14px;
  font-size:13.5px;
  color:var(--text-2);
  border-top:1px solid var(--line);
}
.gallery-item figcaption span{
  display:block;
  font-size:13px;
  color:var(--text-3);
  margin-top:2px;
}
.gallery-nav{display:flex;gap:10px;}
.gallery-nav button{
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--bg-elev-2);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-2);
  cursor:pointer;
  transition:color .18s,border-color .18s,background-color .18s;
}
.gallery-nav button:hover{color:var(--text-1);border-color:var(--accent);background:var(--accent-soft);}
.gallery-nav button svg{width:16px;height:16px;}

/* ---------- 上手路径 ---------- */
.steps-section{background:var(--bg-base);}
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
  margin-top:40px;
}
.steps li{
  position:relative;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.steps li::before{
  content:"";
  position:absolute;
  top:-4px;left:0;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--accent);
}
.steps .step-no{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.steps h3{
  margin-top:10px;
  font-size:18px;
  font-weight:700;
  line-height:1.35;
}
.steps p{
  margin-top:10px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  padding:80px 0;
  background-color:var(--bg-deep);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);
  pointer-events:none;
}
.cta-band .container{position:relative;z-index:1;}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{
  font-size:clamp(23px,3vw,34px);
  font-weight:800;
  line-height:1.2;
}
.cta-inner p{
  margin-top:12px;
  font-size:15px;
  color:var(--text-2);
  max-width:38em;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
  max-width:34em;
}
.footer-col h3{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--text-1);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:14px;
  color:var(--text-2);
  transition:color .18s;
}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom .links a{color:var(--text-3);transition:color .18s;}
.footer-bottom .links a:hover{color:var(--accent);}

/* ---------- 状态样式（通用） ---------- */
.skeleton{
  background:var(--bg-elev-2);
  border-radius:var(--r-sm);
  position:relative;
  overflow:hidden;
}
.skeleton::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,transparent,rgba(237,241,242,.05),transparent);
  animation:shimmer 1.6s infinite;
}
@keyframes shimmer{0%{transform:translateX(-100%);}100%{transform:translateX(100%);}}
.empty-state{
  border:1px dashed rgba(237,241,242,.14);
  border-radius:var(--r-lg);
  padding:48px 24px;
  text-align:center;
  color:var(--text-2);
  font-size:15px;
}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
}
.reveal.is-in{
  opacity:1;
  transform:none;
  transition:opacity .32s cubic-bezier(.22,.61,.36,1),transform .32s cubic-bezier(.22,.61,.36,1);
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  *{animation:none!important;transition-duration:.01ms!important;}
}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--container:1240px;}
}
@media (max-width:1199px){
  :root{--gap:20px;--section-y:80px;}
  .feature-row{gap:40px;}
}
@media (max-width:991px){
  :root{--section-y:72px;}
  .header-search{max-width:220px;}
  .feature-row{grid-template-columns:1fr;gap:24px;}
  .feature-row.is-reverse .feature-media{order:0;}
  .feature-row + .feature-row{margin-top:56px;}
  .feature-body > p{max-width:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .steps{grid-template-columns:1fr;gap:24px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  :root{--section-y:56px;}
  .container{padding:0 16px;}
  .header-search{display:none;}
  .icon-btn{display:inline-flex;}
  .header-top{gap:12px;}
  .page-hero{padding:32px 0 40px;}
  .hero-stats{gap:0 18px;margin-top:22px;}
  .hero-stats li{padding-left:14px;}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:24px;}
  .check-grid{grid-template-columns:1fr;column-gap:0;}
  .gallery-item{flex:0 0 78vw;}
  .gallery-nav{display:none;}
  .cta-band{padding:64px 0;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{padding-bottom:32px;}
  .footer-bottom{justify-content:flex-start;}
}
@media (max-width:559px){
  body{font-size:15px;}
  .page-hero h1{font-size:29px;}
  .feature-index{font-size:30px;}
  .gallery-track{padding:4px 16px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .hero-stats li:nth-child(n+3){display:none;}
}

/* roulang page: category2 */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,0.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,0.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,0.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset, 0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28), 0 18px 40px -20px rgba(0,0,0,.9);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sec-gap:96px;
  --head-h:68px;
  --chan-h:48px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:132px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
svg{display:block;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  padding:14px 26px;border-radius:var(--r-md);border:1px solid transparent;
  cursor:pointer;transition:background .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-ico{transition:transform .18s ease;}
.btn-primary{background:var(--primary);color:#0B0E11;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 26px -10px rgba(255,91,46,.45);}
.btn-primary:hover .btn-ico{transform:translateX(2px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;border-color:rgba(237,241,242,.16);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft);}
.btn-ghost:hover .btn-ico{transform:translateX(2px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-lg{padding:18px 40px;font-size:17px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--accent-soft);color:var(--accent);
}
.tag-neutral{background:var(--bg-elev-2);color:var(--text-2);}
.tag-warn{background:rgba(242,179,61,.12);color:var(--warn);}
.tag-primary{background:var(--primary-soft);color:var(--primary);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(10,12,14,.94);
  border-bottom-color:var(--line);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.header-top{
  height:var(--head-h);
  display:flex;align-items:center;gap:20px;
}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{width:30px;height:30px;flex:none;}
.logo-mark svg{width:100%;height:100%;}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0;color:var(--text-1);}
.logo-text em{font-size:11px;font-style:normal;font-weight:600;color:var(--text-3);letter-spacing:.04em;}

.header-search{position:relative;display:flex;align-items:center;margin-left:auto;width:300px;flex:none;}
.header-search .s-ico{position:absolute;left:13px;width:16px;height:16px;color:var(--text-3);pointer-events:none;}
.header-search input{
  width:100%;height:40px;padding:0 14px 0 38px;
  background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-sm);
  color:var(--text-1);font-size:14px;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.header-search input::placeholder{color:var(--text-3);}
.header-search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);}

.header-actions{display:flex;align-items:center;gap:12px;flex:none;}
.icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-sm);
  background:var(--bg-elev-2);border:1px solid var(--line);color:var(--text-2);
  cursor:pointer;transition:color .18s ease,border-color .18s ease;
}
.icon-btn svg{width:18px;height:18px;}
.icon-btn:hover{color:var(--text-1);border-color:var(--accent);}

.nav-channels{border-top:1px solid var(--line-soft);}
.channels-inner{
  height:var(--chan-h);display:flex;align-items:center;gap:6px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--text-2);white-space:nowrap;
  transition:color .12s ease,background .12s ease;
}
.channel:hover{color:var(--text-1);}
.channel.is-active{color:var(--primary);background:var(--primary-soft);}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--text-3);}
.crumb a{transition:color .15s ease;}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--line);}
.crumb .cur{color:var(--text-2);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-color:var(--bg-base);
  background-image:
    linear-gradient(180deg,rgba(10,12,14,.70) 0%,rgba(10,12,14,.93) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(1200px 520px at 50% -12%, rgba(63,217,200,.09), transparent 62%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:
    radial-gradient(1px 1px at 12% 24%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 38% 68%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 66% 18%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 84% 52%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 52% 88%, var(--star), transparent 60%);
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding:64px 0 72px;
}
.hero-copy .crumb{margin-bottom:20px;}
.page-title{
  font-size:clamp(30px,4.2vw,46px);font-weight:800;line-height:1.12;letter-spacing:0;
}
.page-title .thin{color:var(--text-3);font-weight:800;}
.hero-sub{
  margin-top:16px;max-width:46ch;
  font-size:16px;line-height:1.85;color:var(--text-2);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

.window{
  border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  background:var(--bg-elev-1);box-shadow:var(--shadow-card);
}
.window-bar{
  height:34px;display:flex;align-items:center;gap:6px;padding:0 14px;
  background:var(--bg-elev-2);border-bottom:1px solid var(--line);
}
.window-bar i{width:9px;height:9px;border-radius:50%;background:#2C353A;}
.window-bar i:nth-child(1){background:#3B3129;}
.window-bar i:nth-child(2){background:#2A3A38;}
.window img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s cubic-bezier(.22,.61,.36,1);}
.window:hover img{transform:scale(1.03);}

/* ---------- 板块通用 ---------- */
.section{padding:var(--sec-gap) 0;}
.section-head{margin-bottom:36px;max-width:72ch;}
.section-title{
  font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.2;letter-spacing:0;
}
.section-sub{margin-top:12px;font-size:15px;line-height:1.85;color:var(--text-2);}
.section-head-row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;
}

/* ---------- 筛选 ---------- */
.filter-bar{
  display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;margin-bottom:36px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.filter-bar::-webkit-scrollbar{display:none;}
.filter-pill{
  height:34px;padding:0 16px;border-radius:999px;white-space:nowrap;
  background:var(--bg-elev-1);border:1px solid var(--line);
  color:var(--text-2);font-size:13px;font-weight:600;cursor:pointer;
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.filter-pill:hover{color:var(--text-1);border-color:rgba(63,217,200,.4);}
.filter-pill.is-active{background:var(--accent-soft);border-color:rgba(63,217,200,.35);color:var(--accent);}
.filter-pill:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:30px;}
.timeline::before{
  content:"";position:absolute;left:5px;top:8px;bottom:8px;width:2px;background:var(--line);
}
.tl-item{position:relative;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item[hidden]{display:none;}
.tl-dot{
  position:absolute;left:-30px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--bg-base);border:2px solid var(--accent);
}
.tl-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.tl-meta time{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.tl-title{margin:10px 0 8px;font-size:18px;font-weight:700;line-height:1.4;}
.tl-desc{margin:0 0 12px;max-width:70ch;font-size:15px;line-height:1.8;color:var(--text-2);}
.tl-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--text-1);
  border-bottom:1px solid rgba(63,217,200,.45);padding-bottom:1px;
  transition:color .18s ease,border-color .18s ease;
}
.tl-link:hover{color:var(--primary);border-color:var(--primary);}
.tl-link:hover .btn-ico{transform:translateX(2px);}

/* ---------- 栏目构成 ---------- */
.num-row{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-left:1px solid var(--line);
}
.num-cell{
  padding:32px 28px 34px;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-elev-1);
  transition:background .25s ease;
}
.num-cell:hover{background:var(--bg-elev-2);}
.num-cell .num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:28px;font-weight:800;color:var(--primary);line-height:1;
}
.num-cell h3{margin:18px 0 10px;font-size:18px;font-weight:700;line-height:1.35;}
.num-cell p{font-size:15px;line-height:1.8;color:var(--text-2);}

/* ---------- 关注条目 ---------- */
.focus-list{display:flex;flex-direction:column;gap:20px;}
.focus-item{
  display:grid;grid-template-columns:260px 1fr;gap:26px;align-items:center;
  padding:18px;background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.focus-item:hover{border-color:rgba(255,91,46,.28);box-shadow:var(--shadow-card-hover);transform:translateY(-2px);}
.focus-thumb{border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--line-soft);}
.focus-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s cubic-bezier(.22,.61,.36,1);}
.focus-item:hover .focus-thumb img{transform:scale(1.03);}
.focus-body h3{margin:12px 0 8px;font-size:18px;font-weight:700;line-height:1.4;}
.focus-body p{font-size:15px;line-height:1.8;color:var(--text-2);max-width:62ch;}
.focus-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:16px 4px 16px 0;
  background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;line-height:1.5;color:var(--text-1);
  transition:padding-left .2s ease,color .18s ease;
}
.faq-q:hover{color:var(--primary);}
.faq-item.is-open .faq-q{padding-left:16px;}
.faq-item.is-open .faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:2px;background:var(--primary);
}
.faq-icon{position:relative;width:16px;height:16px;flex:none;transition:transform .25s ease;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-2);border-radius:1px;transition:opacity .25s ease,transform .25s ease;
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.is-open .faq-icon::after{opacity:0;transform:rotate(90deg);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-item.is-open .faq-a{max-height:340px;}
.faq-a p{
  margin:0 0 20px;padding-left:16px;max-width:76ch;
  font-size:15px;line-height:1.85;color:var(--text-2);
}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-xl);border:1px solid var(--line);
  background-color:var(--bg-deep);
  background-image:
    linear-gradient(180deg,rgba(7,9,10,.72) 0%,rgba(7,9,10,.90) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  padding:52px 48px;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:
    radial-gradient(1px 1px at 18% 32%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 46% 76%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 74% 22%, var(--star), transparent 60%),
    radial-gradient(1px 1px at 90% 62%, var(--star), transparent 60%);
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.25;}
.cta-inner p{margin-top:10px;max-width:48ch;font-size:15px;line-height:1.8;color:var(--text-2);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-deep);border-top:1px solid var(--line);
  margin-top:var(--sec-gap);padding-top:64px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand p{margin-top:16px;max-width:36ch;font-size:14px;line-height:1.75;color:var(--text-2);}
.footer-col h3{margin:0 0 16px;font-size:13px;font-weight:700;color:var(--text-1);letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .15s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.footer-bottom .links{display:flex;gap:18px;}
.footer-bottom a{transition:color .15s ease;}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- 动效入场 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.22,.61,.36,1),transform .32s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container{max-width:1180px;}
}
@media (max-width:1199px){
  .container{max-width:1140px;padding:0 20px;}
  .header-search{width:250px;}
  .hero-inner{gap:36px;}
}
@media (max-width:991px){
  :root{--sec-gap:72px;}
  .header-search{width:200px;}
  .hero-inner{grid-template-columns:1fr;gap:34px;padding:48px 0 56px;}
  .num-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--sec-gap:56px;}
  .header-search{display:none;}
  .icon-btn{display:inline-flex;}
  .site-header.search-open .header-search{
    display:flex;position:absolute;left:16px;right:16px;top:60px;width:auto;margin:0;
    padding:10px;background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-md);z-index:20;
  }
  .page-title{font-size:clamp(28px,7vw,34px);}
  .section-title{font-size:clamp(21px,5.6vw,26px);}
  .num-cell{padding:26px 22px;}
  .focus-item{grid-template-columns:1fr;gap:16px;}
  .cta-band{padding:36px 24px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .timeline{padding-left:24px;}
  .tl-dot{left:-24px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .logo-text strong{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-cta .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,0.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,0.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,0.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --shadow-card:0 1px 0 rgba(255,255,255,0.04) inset, 0 14px 32px -22px rgba(0,0,0,0.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,0.28), 0 18px 40px -20px rgba(0,0,0,0.9);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:116px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:132px;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--text-1);text-decoration:none;transition:color .18s var(--ease);}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:4px;
}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-md);
  font-size:15px;font-weight:700;line-height:1;
  transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn-ico{transition:transform .18s var(--ease);}
.btn-primary{background:var(--primary);color:#0B0E11;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 26px -10px rgba(255,91,46,.45);}
.btn-primary:hover .btn-ico{transform:translateX(2px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-secondary{
  border:1px solid rgba(237,241,242,.16);
  color:var(--text-1);
  background:transparent;
}
.btn-secondary:hover{border-color:var(--accent);background:var(--accent-soft);}
.btn-secondary:hover .btn-ico{transform:translateX(2px);}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:var(--r-sm);}
.btn-lg{padding:18px 40px;font-size:17px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn.is-loading{opacity:.7;cursor:progress;pointer-events:none;}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--text-1);
  border-bottom:1px solid rgba(63,217,200,.45);
  padding-bottom:2px;
  font-weight:600;
}
.link-underline:hover{color:var(--accent);border-bottom-color:var(--accent);}
.link-underline:hover .btn-ico{transform:translateX(2px);}

/* ---------- 双层导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease);
  border-bottom:1px solid transparent;
  scroll-padding-top:132px;
}
.site-header.is-scrolled{
  background:rgba(10,12,14,.94);
  border-bottom:1px solid var(--line);
}
.header-top{
  display:flex;align-items:center;gap:24px;
  height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg-elev-1);}
.logo-mark svg{width:20px;height:20px;}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0;}
.logo-text em{font-size:11px;font-style:normal;color:var(--text-3);letter-spacing:.06em;}
.header-search{
  position:relative;flex:1 1 auto;max-width:320px;margin-left:auto;
}
.header-search .s-ico{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--text-3);pointer-events:none;
}
.header-search input{
  width:100%;height:40px;
  padding:0 14px 0 36px;
  background:var(--bg-elev-2);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-1);
  font-size:14px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.header-search input::placeholder{color:var(--text-3);}
.header-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--bg-elev-1);color:var(--text-2);
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.icon-btn svg{width:18px;height:18px;}
.icon-btn:hover{border-color:var(--accent);color:var(--text-1);background:var(--bg-elev-2);}
.nav-channels{border-top:1px solid var(--line-soft);}
.channels-inner{
  display:flex;align-items:center;gap:8px;
  height:48px;overflow-x:auto;scrollbar-width:none;
}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;flex:0 0 auto;
  padding:8px 14px;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;color:var(--text-2);
  transition:color .12s var(--ease),background .12s var(--ease);
}
.channel:hover{color:var(--text-1);}
.channel.is-active{color:var(--primary);background:var(--primary-soft);}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  padding:20px 0 0;
}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--text-1);}
.crumbs .sep{color:var(--line);}
.crumbs .now{color:var(--text-2);}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.5;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,14,.72) 0%,rgba(10,12,14,.9) 62%,var(--bg-base) 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:radial-gradient(1200px 520px at 50% -12%, rgba(63,217,200,.09), transparent 62%);
}
.hero .stars{
  position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.055;
  background-image:
    radial-gradient(1px 1px at 12% 24%, var(--star), transparent),
    radial-gradient(1px 1px at 38% 12%, var(--star), transparent),
    radial-gradient(1px 1px at 64% 34%, var(--star), transparent),
    radial-gradient(1px 1px at 82% 18%, var(--star), transparent),
    radial-gradient(1px 1px at 52% 62%, var(--star), transparent);
  background-size:520px 320px;
}
.hero-inner{position:relative;z-index:2;padding:40px 0 72px;}
.hero-crumb{padding-top:0;}
.hero h1{
  margin-top:22px;
  font-size:clamp(30px,5vw,54px);
  font-weight:800;line-height:1.10;letter-spacing:0;
  max-width:820px;
}
.hero-sub{
  margin-top:16px;
  font-size:clamp(16px,2vw,20px);
  font-weight:600;color:var(--text-1);
}
.hero-desc{
  margin-top:12px;max-width:660px;
  font-size:15px;line-height:1.8;color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-rail{
  margin-top:40px;display:grid;gap:12px;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--line);padding-top:20px;max-width:760px;
}
.hero-rail div{font-size:13px;color:var(--text-3);}
.hero-rail strong{display:block;color:var(--text-1);font-size:15px;font-weight:700;margin-bottom:2px;}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0 0;}
.section:last-of-type{padding-bottom:0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-head h2{
  font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.20;letter-spacing:0;
  position:relative;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:2px;background:var(--primary);
}
.section-head p{font-size:14px;color:var(--text-3);max-width:520px;text-align:right;}

/* ---------- 数据统计条 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.stat-card{
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px 20px;
  box-shadow:var(--shadow-card);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.stat-value{display:flex;align-items:baseline;gap:6px;font-family:var(--font-num);}
.stat-value b{font-size:40px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;}
.stat-value span{font-size:13px;color:var(--text-3);}
.stat-card.is-accent .stat-value b{color:var(--accent);}
.stat-card.is-primary .stat-value b{color:var(--primary);}
.stat-label{margin-top:14px;font-size:13px;font-weight:600;color:var(--text-1);}
.stat-note{margin-top:6px;font-size:13px;line-height:1.7;color:var(--text-3);}

/* ---------- 数据分组手风琴 ---------- */
.acc-list{display:flex;flex-direction:column;gap:12px;}
.acc{
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.acc[open]{border-color:rgba(63,217,200,.28);box-shadow:var(--shadow-card);}
.acc summary{
  display:flex;align-items:center;gap:14px;
  min-height:56px;padding:0 22px;
  font-size:16px;font-weight:700;
  cursor:pointer;list-style:none;
}
.acc summary::-webkit-details-marker{display:none;}
.acc summary::after{
  content:"+";margin-left:auto;font-size:20px;font-weight:400;color:var(--text-3);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.acc[open] summary::after{transform:rotate(45deg);color:var(--primary);}
.acc summary .acc-count{
  margin-left:12px;font-size:12px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);border-radius:999px;padding:2px 10px;
}
.acc-body{border-top:1px solid var(--line);padding:6px 0 10px;}
.acc-row{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.7fr) minmax(0,1.6fr);
  align-items:center;gap:16px;
  min-height:56px;padding:0 22px;
  border-bottom:1px solid var(--line-soft);
  font-size:14px;
}
.acc-row:last-child{border-bottom:0;}
.acc-row .r-name{font-weight:600;color:var(--text-1);}
.acc-row .r-value{font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--accent);font-weight:600;}
.acc-row .r-desc{color:var(--text-2);font-size:14px;}

/* ---------- 图文块 ---------- */
.shot{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:center;}
.shot-img{
  position:relative;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  background:var(--bg-elev-2);aspect-ratio:16/10;
}
.shot-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
.shot-img:hover img{transform:scale(1.03);}
.shot-body h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;line-height:1.25;}
.shot-body p{margin-top:14px;font-size:15px;color:var(--text-2);}
.shot-points{margin-top:22px;display:flex;flex-direction:column;gap:14px;}
.shot-points li{display:flex;gap:12px;font-size:15px;color:var(--text-2);}
.shot-points li b{flex:0 0 auto;font-family:var(--font-num);font-weight:800;color:var(--primary);}

/* ---------- 定义网格 ---------- */
.def-wrap{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start;
}
.def-grid{
  background:var(--bg-elev-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:6px 24px;
  box-shadow:var(--shadow-card);
}
.def-row{
  display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:20px;
  align-items:baseline;
  padding:18px 0;border-bottom:1px solid var(--line-soft);
}
.def-row:last-child{border-bottom:0;}
.def-key{font-size:13px;font-weight:600;color:var(--text-3);letter-spacing:.02em;}
.def-val{font-size:15px;color:var(--text-1);line-height:1.75;}
.def-aside{
  background:var(--bg-deep);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  position:sticky;top:148px;
}
.def-aside h3{font-size:17px;font-weight:700;}
.def-aside ul{margin-top:16px;display:flex;flex-direction:column;gap:12px;}
.def-aside li{font-size:14px;color:var(--text-2);padding-left:14px;position:relative;}
.def-aside li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.def-aside .btn{margin-top:22px;width:100%;justify-content:center;}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  display:flex;align-items:center;gap:14px;
  min-height:56px;padding:14px 4px 14px 0;
  font-size:16px;font-weight:600;cursor:pointer;list-style:none;
  transition:color .18s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--primary);}
.faq summary::after{
  content:"+";margin-left:auto;font-size:20px;color:var(--text-3);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.faq details[open] summary{color:var(--text-1);}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--primary);}
.faq .a-body{
  padding:0 4px 20px 0;
  font-size:15px;line-height:1.85;color:var(--text-2);
  position:relative;
}
.faq details[open] .a-body::before{
  content:"";position:absolute;left:-14px;top:4px;bottom:22px;width:3px;border-radius:2px;background:var(--primary);
}

/* ---------- CTA 带 ---------- */
.cta-band{
  margin-top:96px;
  position:relative;overflow:hidden;
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(1200px 520px at 50% -12%, rgba(63,217,200,.09), transparent 62%);
}
.cta-stars{
  position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:
    radial-gradient(1px 1px at 16% 30%, var(--star), transparent),
    radial-gradient(1px 1px at 46% 18%, var(--star), transparent),
    radial-gradient(1px 1px at 74% 40%, var(--star), transparent),
    radial-gradient(1px 1px at 88% 22%, var(--star), transparent);
  background-size:480px 300px;
}
.cta-inner{
  position:relative;padding:64px 0;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,3vw,32px);font-weight:800;line-height:1.22;}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:520px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.4fr));
  gap:40px;padding:64px 0 40px;
}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:280px;line-height:1.8;}
.footer-col h3{font-size:13px;font-weight:700;color:var(--text-1);letter-spacing:.04em;}
.footer-col ul{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 28px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom .links a{color:var(--text-3);}
.footer-bottom .links a:hover{color:var(--text-2);}

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

/* ---------- 表单与状态样式（备用态） ---------- */
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:14px;font-weight:600;color:var(--text-1);}
.field input,.field select,.field textarea{
  min-height:48px;padding:12px 14px;
  background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-sm);
  color:var(--text-1);font-size:15px;font-family:inherit;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);
}
.field.has-error input,.field.has-error textarea,.field.has-error select{border-color:var(--err);}
.field .err-msg{font-size:13px;color:var(--err);}
.field.is-ok input,.field.is-ok textarea{border-color:var(--ok);}
.state-note{font-size:13px;color:var(--ok);}
.empty-state{
  border:1px dashed rgba(237,241,242,.14);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;color:var(--text-2);font-size:15px;
}
.skeleton{
  background:var(--bg-elev-2);border-radius:var(--r-sm);position:relative;overflow:hidden;
}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(237,241,242,.05),transparent);
  animation:shimmer 1.6s infinite;
}
@keyframes shimmer{0%{transform:translateX(-100%);}100%{transform:translateX(100%);}}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .container{max-width:1240px;}
}
@media (max-width:1199px){
  .container{max-width:1140px;padding:0 20px;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .def-wrap{grid-template-columns:1fr;}
  .def-aside{position:static;}
}
@media (max-width:991px){
  .header-search{display:none;}
  .icon-btn{display:inline-flex;}
  .section{padding-top:72px;}
  .shot{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .hero-inner{padding:32px 0 56px;}
}
@media (max-width:767px){
  .section{padding-top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;}
  .section-head p{text-align:left;}
  .hero-rail{grid-template-columns:1fr;gap:14px;}
  .acc-row{grid-template-columns:1fr;gap:4px;padding:14px 20px;min-height:0;}
  .acc summary{padding:0 18px;font-size:15px;}
  .def-grid{padding:6px 18px;}
  .def-row{grid-template-columns:1fr;gap:6px;}
  .cta-inner{padding:48px 0;}
  .cta-band{margin-top:64px;}
}
@media (max-width:559px){
  .container{padding:0 16px;}
  .stat-grid{grid-template-columns:1fr;}
  .header-actions .btn span{display:none;}
  .logo-text strong{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;justify-content:center;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category5 */
:root{
  --bg-base:#0A0C0E;
  --bg-elev-1:#12161A;
  --bg-elev-2:#171D21;
  --bg-deep:#07090A;
  --line:#232A2F;
  --line-soft:rgba(237,241,242,.08);
  --text-1:#EDF1F2;
  --text-2:#A6B1B6;
  --text-3:#6E7C82;
  --primary:#FF5B2E;
  --primary-hover:#E84A1F;
  --primary-soft:rgba(255,91,46,.12);
  --accent:#3FD9C8;
  --accent-soft:rgba(63,217,200,.10);
  --star:#D9E4E8;
  --ok:#46C87C;
  --warn:#F2B33D;
  --err:#F2555A;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Space Grotesk","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset,0 14px 32px -22px rgba(0,0,0,.85);
  --shadow-card-hover:0 0 0 1px rgba(255,91,46,.28),0 18px 40px -20px rgba(0,0,0,.9);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
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;}
svg{display:block;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-md);border:1px solid transparent;
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
}
.btn-ico{transition:transform .2s var(--ease);}
.btn-primary{background:var(--primary);color:#0B0E11;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 26px -10px rgba(255,91,46,.45);}
.btn-primary:hover .btn-ico{transform:translateX(2px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-primary:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-ghost{background:transparent;border-color:rgba(237,241,242,.16);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--accent);background:var(--accent-soft);}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:var(--r-sm);}
.btn-lg{padding:18px 40px;font-size:17px;}
.link-underline{color:var(--text-1);border-bottom:1px solid rgba(63,217,200,.45);padding-bottom:1px;transition:border-color .2s var(--ease),color .2s var(--ease);}
.link-underline:hover{border-color:var(--accent);color:var(--accent);}

/* ---------- 标签 ---------- */
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.02em;background:var(--accent-soft);color:var(--accent);}
.tag-neutral{background:var(--bg-elev-2);color:var(--text-2);}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:transparent;border-bottom:1px solid transparent;transition:background .24s var(--ease),border-color .24s var(--ease);}
.site-header.is-scrolled{background:rgba(10,12,14,.94);border-bottom-color:var(--line);backdrop-filter:blur(6px);}
.header-top{position:relative;display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none;}
.logo-mark{width:28px;height:28px;flex:none;}
.logo-mark svg{width:100%;height:100%;}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-text strong{font-size:15px;font-weight:800;letter-spacing:0;}
.logo-text em{font-style:normal;font-size:11px;font-weight:500;color:var(--text-3);letter-spacing:.04em;}

.header-search{
  display:flex;align-items:center;gap:8px;width:300px;height:40px;margin-left:auto;
  padding:0 8px 0 12px;background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.header-search .s-ico{width:16px;height:16px;color:var(--text-3);flex:none;}
.header-search input{flex:1;min-width:0;background:transparent;border:0;outline:0;font-size:14px;}
.header-search input::placeholder{color:var(--text-3);}
.header-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);}

.header-actions{display:flex;align-items:center;gap:10px;flex:none;}
.icon-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--r-sm);background:var(--bg-elev-2);border:1px solid var(--line);cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease);}
.icon-btn svg{width:18px;height:18px;color:var(--text-2);}
.icon-btn:hover{border-color:var(--accent);}
.icon-btn:hover svg{color:var(--accent);}

.nav-channels{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:rgba(10,12,14,.72);}
.channels-inner{display:flex;align-items:center;gap:4px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{position:relative;display:inline-flex;align-items:center;height:48px;padding:0 14px;font-size:14.5px;color:var(--text-2);white-space:nowrap;transition:color .12s var(--ease);}
.channel:hover{color:var(--text-1);}
.channel.is-active{color:var(--text-1);font-weight:600;}
.channel.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;border-radius:2px;background:var(--primary);}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:720px;margin-bottom:32px;}
.section-head h2{font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.2;}
.section-head p{margin-top:12px;color:var(--text-2);font-size:15px;}
.eyebrow{display:block;font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;margin-bottom:12px;}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--text-3);margin-bottom:28px;}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--text-1);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--text-2);}

/* ---------- Hero ---------- */
.help-hero{
  position:relative;overflow:hidden;padding:64px 0 72px;
  background-image:linear-gradient(rgba(7,9,10,.74),rgba(10,12,14,.94)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;border-bottom:1px solid var(--line);
}
.help-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(1200px 520px at 50% -12%,rgba(63,217,200,.09),transparent 62%);
}
.help-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:radial-gradient(var(--star) 1px,transparent 1px);
  background-size:96px 96px;background-position:12px 24px;
}
.help-hero .container{position:relative;z-index:2;}
.help-hero h1{font-size:clamp(28px,4.4vw,48px);font-weight:800;line-height:1.14;max-width:860px;}
.hero-sub{margin-top:16px;max-width:640px;font-size:16px;color:var(--text-2);line-height:1.8;}

.help-search{
  display:flex;align-items:center;gap:10px;width:100%;max-width:560px;height:52px;
  margin:32px auto 0;padding:0 8px 0 16px;
  background:var(--bg-elev-2);border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.help-search .s-ico{width:18px;height:18px;color:var(--text-3);flex:none;}
.help-search input{flex:1;min-width:0;background:transparent;border:0;outline:0;font-size:15px;}
.help-search input::placeholder{color:var(--text-3);}
.help-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);}

.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:0;
  margin-top:22px;font-size:13px;color:var(--text-3);
}
.hero-meta span{padding:0 14px;border-right:1px solid var(--line);line-height:1.4;}
.hero-meta span:last-child{border-right:0;}

/* ---------- 锚点 pill ---------- */
.pill-bar{border-bottom:1px solid var(--line);background:var(--bg-deep);}
.pill-inner{display:flex;align-items:center;gap:10px;height:62px;overflow-x:auto;scrollbar-width:none;}
.pill-inner::-webkit-scrollbar{display:none;}
.pill{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;white-space:nowrap;
  border:1px solid var(--line);border-radius:999px;background:var(--bg-elev-1);
  font-size:14px;color:var(--text-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.pill:hover,.pill.is-active{color:var(--accent);border-color:rgba(63,217,200,.4);background:var(--accent-soft);}

/* ---------- 服务时效 ---------- */
.status-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat-card{
  padding:24px;background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.stat-num{display:flex;align-items:baseline;gap:4px;font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:34px;font-weight:800;line-height:1.1;}
.stat-num .unit{font-size:14px;font-weight:600;color:var(--text-3);}
.stat-num.c-primary{color:var(--primary);}
.stat-num.c-accent{color:var(--accent);}
.stat-num.c-star{color:var(--star);}
.stat-label{margin-top:8px;font-size:13px;color:var(--text-3);}

/* ---------- FAQ ---------- */
.faq-groups{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.faq-group-title{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;margin-bottom:8px;}
.faq-group-title::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--accent);flex:none;}
.faq-group-title span{font-size:12px;font-weight:600;color:var(--text-3);}
.faq-item{position:relative;border-bottom:1px solid var(--line);}
.faq-item::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;background:var(--primary);opacity:0;transition:opacity .24s var(--ease);}
.faq-item.is-open::before{opacity:1;}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  min-height:56px;padding:14px 6px 14px 18px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;line-height:1.6;cursor:pointer;color:var(--text-1);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-ico{position:relative;flex:none;width:16px;height:16px;}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;left:50%;top:50%;background:var(--text-2);border-radius:2px;transform:translate(-50%,-50%);transition:transform .28s var(--ease),opacity .28s var(--ease),background .2s var(--ease);}
.faq-ico::before{width:14px;height:1.6px;}
.faq-ico::after{width:1.6px;height:14px;}
.faq-item.is-open .faq-ico::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-item.is-open .faq-ico::before{background:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a-inner{padding:0 36px 20px 18px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- 联系表单 ---------- */
.contact-layout{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.contact-intro h2{font-size:clamp(23px,3vw,32px);font-weight:800;line-height:1.24;}
.contact-intro p{margin-top:14px;color:var(--text-2);font-size:15px;}
.contact-points{margin-top:24px;display:grid;gap:12px;}
.contact-points li{display:flex;gap:10px;font-size:14px;color:var(--text-2);}
.contact-points li::before{content:"";width:6px;height:6px;margin-top:9px;border-radius:2px;background:var(--accent);flex:none;}
.contact-figure{margin-top:28px;position:relative;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--bg-elev-2);}
.contact-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.contact-figure figcaption{padding:12px 16px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line);}

.form-card{padding:28px;background:var(--bg-elev-1);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-card);}
.form-alert{display:none;margin-bottom:20px;padding:12px 16px;border-radius:var(--r-sm);font-size:13px;line-height:1.6;}
.form-alert.is-visible{display:block;}
.form-alert.is-ok{background:rgba(70,200,124,.08);border:1px solid var(--ok);color:var(--ok);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 24px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:600;}
.field .req{font-size:12px;font-weight:500;color:var(--text-3);margin-left:6px;}
.form-control{
  width:100%;height:48px;padding:0 14px;background:var(--bg-elev-2);
  border:1px solid var(--line);border-radius:var(--r-sm);font-size:15px;outline:0;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.form-control::placeholder{color:var(--text-3);}
.form-control:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,217,200,.16);}
textarea.form-control{height:auto;min-height:132px;padding:12px 14px;line-height:1.75;resize:vertical;}
select.form-control{
  appearance:none;-webkit-appearance:none;padding-right:38px;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5l5-5' stroke='%23A6B1B6' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
}
.err-msg{display:none;font-size:13px;color:var(--err);}
.field.has-error .form-control{border-color:var(--err);}
.field.has-error .err-msg{display:block;}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:26px;}
.form-note{font-size:13px;color:var(--text-3);max-width:420px;line-height:1.7;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--bg-deep);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:72px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(7,9,10,.82),rgba(7,9,10,.9)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.9;
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:radial-gradient(var(--star) 1px,transparent 1px);background-size:88px 88px;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.25;}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 空态 / 骨架 ---------- */
.empty-state{
  padding:48px 24px;text-align:center;border:1px dashed rgba(237,241,242,.14);border-radius:var(--r-lg);
}
.empty-state svg{width:40px;height:40px;margin:0 auto 14px;color:var(--text-3);}
.empty-state p{font-size:15px;color:var(--text-2);}
.skeleton{background:var(--bg-elev-2);border-radius:var(--r-sm);position:relative;overflow:hidden;}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(237,241,242,.05),transparent);
  animation:sk 1.6s infinite;
}
@keyframes sk{0%{transform:translateX(-100%);}100%{transform:translateX(100%);}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:300px;line-height:1.8;}
.footer-col h3{font-size:13px;font-weight:700;color:var(--text-1);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.footer-bottom .links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom a{color:var(--text-3);transition:color .2s var(--ease);}
.footer-bottom a:hover{color:var(--text-1);}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .container{max-width:1240px;}
}
@media (max-width:1199px){
  .container{padding:0 24px;}
  .status-strip{gap:20px;}
  .stat-num{font-size:30px;}
}
@media (max-width:991px){
  .section{padding:72px 0;}
  .faq-groups{grid-template-columns:1fr;gap:32px;}
  .contact-layout{grid-template-columns:1fr;gap:36px;}
  .status-strip{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:900px){
  .header-search{display:none;}
  .header-search.is-open{
    display:flex;position:absolute;left:16px;right:16px;top:12px;width:auto;margin-left:0;z-index:6;
  }
  .icon-btn{display:inline-flex;}
  .channels-inner{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 24px,#000 calc(100% - 24px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 24px,#000 calc(100% - 24px),transparent 100%);
  }
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:60px 0;}
  .help-hero{padding:40px 0 56px;}
  .help-search{margin-top:24px;height:50px;}
  .hero-meta span{padding:0 10px;}
  .form-grid{grid-template-columns:1fr;}
  .form-foot{flex-direction:column;align-items:stretch;}
  .form-foot .btn{width:100%;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .header-top{gap:12px;}
  .logo-text em{display:none;}
  .status-strip{grid-template-columns:1fr;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .pill-inner{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 20px,#000 calc(100% - 20px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 20px,#000 calc(100% - 20px),transparent 100%);
  }
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}