/* roulang page: index */
:root{
  --ink:#14161A;
  --ink-80:rgba(20,22,26,.8);
  --signal:#FF4A1C;
  --signal-hover:#E63E12;
  --signal-soft:rgba(255,74,28,.1);
  --teal:#0E6E63;
  --teal-soft:rgba(14,110,99,.1);
  --paper:#F7F6F3;
  --white:#FFFFFF;
  --divider:#EFEDE8;
  --text:#14161A;
  --text-2:#6B6A66;
  --text-3:#96948E;
  --line:#E3E0D9;
  --line-dark:rgba(255,255,255,.14);
  --ok:#1F7A4D;
  --warn:#B4761B;
  --err:#C0392B;
  --r-card:16px;
  --r-block:24px;
  --r-btn:10px;
  --r-img:14px;
  --r-input:10px;
  --r-pill:999px;
  --s1:0 1px 2px rgba(20,22,26,.06);
  --s2:0 10px 30px -12px rgba(20,22,26,.16);
  --s3:0 18px 44px -16px rgba(20,22,26,.22);
  --sp4:4px; --sp8:8px; --sp12:12px; --sp16:16px; --sp24:24px; --sp32:32px;
  --sp48:48px; --sp64:64px; --sp96:96px; --sp120:120px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,"SF Mono",Menlo,monospace;
  --ease:200ms ease;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--ink);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--signal);}
img{max-width:100%;height:auto;display:block;}
button,input{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);}
p{margin:0 0 1.5em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:var(--signal);color:#fff;}

.container-x{max-width:1240px;margin:0 auto;padding:0 32px;width:100%;}
.section{padding:var(--sp96) 0;}
.section-alt{background:var(--white);}
.section-paper{background:var(--paper);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp24);margin-bottom:var(--sp48);}
.section-head .eyebrow{font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--text-3);margin-bottom:10px;display:block;}
.section-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:700;letter-spacing:-.015em;line-height:1.2;}
.section-head p{color:var(--text-2);font-size:15px;max-width:640px;margin-top:12px;margin-bottom:0;}
.link-more{font-size:14px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center;gap:8px;}
.link-more i{transition:transform var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* 顶部滚动进度 */
#scrollProgress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--signal);z-index:2000;transition:width 80ms linear;}

/* 按钮 */
.btn-mk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;
  transition:background-color var(--ease),color var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.btn-mk-lg{height:56px;padding:0 30px;font-size:16px;}
.btn-signal{background:var(--signal);color:#fff;border-color:var(--signal);}
.btn-signal:hover{background:var(--signal-hover);border-color:var(--signal-hover);color:#fff;transform:translateY(-1px);}
.btn-signal:hover i{transform:translateX(4px);}
.btn-signal i{transition:transform var(--ease);}
.btn-signal:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:rgba(20,22,26,.08);color:var(--ink);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-mk:focus-visible,a:focus-visible,input:focus-visible,button:focus-visible{
  outline:2px solid var(--signal);outline-offset:2px;
}
.btn-mk[disabled]{opacity:.45;cursor:not-allowed;}

/* 徽章 */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1.6;
  background:var(--teal-soft);color:var(--teal);white-space:nowrap;
}
.badge-soft.is-signal{background:var(--signal-soft);color:var(--signal);}
.badge-line{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;border:1px solid var(--line);color:var(--text-2);background:var(--white);
}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(247,246,243,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:height var(--ease),background-color var(--ease);
}
.nav-inner{
  display:flex;align-items:center;gap:var(--sp24);
  min-height:88px;padding:12px 0;
  transition:min-height var(--ease),padding var(--ease);
}
.site-header.is-compact .nav-inner{min-height:64px;padding:8px 0;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;letter-spacing:-.02em;
  font-family:var(--font-mono);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.08em;}
.nav-quick{font-size:14px;color:var(--text-2);font-weight:500;white-space:nowrap;}
.nav-quick:hover{color:var(--signal);}

.nav-center{flex:1 1 auto;max-width:620px;display:flex;flex-direction:column;gap:10px;}
.search-form{position:relative;width:100%;}
.search-form input[type="search"]{
  width:100%;height:48px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--white);
  padding:0 108px 0 46px;font-size:14.5px;color:var(--ink);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-form input[type="search"]::placeholder{color:var(--text-3);}
.search-form input[type="search"]:focus{
  outline:none;border-color:var(--ink);
  box-shadow:0 0 0 4px rgba(255,74,28,.12);
}
.search-form .search-icon{
  position:absolute;left:18px;top:50%;transform:translateY(-50%);
  color:var(--text-3);font-size:15px;pointer-events:none;
}
.search-form .search-submit{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  height:36px;padding:0 18px;border-radius:var(--r-pill);border:none;
  background:var(--signal);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
  transition:background-color var(--ease);
}
.search-form .search-submit:hover{background:var(--signal-hover);}
.cat-pills{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px;}
.cat-pills::-webkit-scrollbar{display:none;}
.cat-pills a{
  flex:0 0 auto;padding:5px 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);background:transparent;border:1px solid transparent;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease);
}
.cat-pills a:hover{background:var(--white);border-color:var(--line);color:var(--ink);}
.cat-pills a.active{background:var(--ink);color:#fff;border-color:var(--ink);}

.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--white);
  display:none;align-items:center;justify-content:center;color:var(--ink);cursor:pointer;font-size:15px;
  transition:background-color var(--ease),border-color var(--ease);
}
.nav-icon-btn:hover{background:var(--paper);}
.mobile-panel{display:none;border-top:1px solid var(--line);background:var(--paper);padding:16px 0 20px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .search-form{margin-bottom:14px;}
.mobile-cats{display:flex;flex-direction:column;gap:4px;}
.mobile-cats a{padding:10px 12px;border-radius:10px;font-size:15px;color:var(--ink);}
.mobile-cats a.active{background:var(--signal-soft);color:var(--signal);font-weight:600;}

/* Hero */
.hero{position:relative;background:var(--white);border-bottom:1px solid var(--line);overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(20,22,26,.88) 0%,rgba(20,22,26,.62) 46%,rgba(20,22,26,.34) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center right;
  opacity:.06;pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:var(--sp64);align-items:center;padding:var(--sp96) 0 var(--sp64);}
.hero-eyebrow{font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--signal);margin-bottom:var(--sp16);display:block;}
.hero h1{
  font-size:clamp(34px,5.2vw,64px);font-weight:700;line-height:1.1;letter-spacing:-.02em;margin-bottom:var(--sp24);
}
.hero h1 em{font-style:normal;color:var(--signal);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:var(--sp24);}
.spec-strip{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;
  font-family:var(--font-mono);font-size:13px;color:var(--text-2);
  padding:10px 16px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--paper);
  margin-bottom:var(--sp32);font-variant-numeric:tabular-nums;
}
.spec-strip i{color:var(--text-3);font-size:11px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:14px;}
.hero-note{font-size:13px;color:var(--text-3);}
.hero-note a{color:var(--text-2);border-bottom:1px solid var(--line);}
.hero-note a:hover{color:var(--signal);border-color:var(--signal);}
.hero-visual{position:relative;}
.hero-visual .back{
  width:100%;border-radius:var(--r-block);overflow:hidden;box-shadow:var(--s2);
  border:1px solid var(--line);aspect-ratio:16/11;background:var(--paper);
}
.hero-visual .back img{width:100%;height:100%;object-fit:cover;}
.hero-visual .front{
  position:absolute;left:-16px;bottom:-18px;width:56%;
  border-radius:var(--r-img);overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--s2);
}
.hero-visual .front img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.trust-bar{border-top:1px solid var(--line);padding:var(--sp24) 0;position:relative;}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp24);}
.trust-item{display:flex;flex-direction:column;gap:4px;}
.trust-item strong{font-family:var(--font-mono);font-size:22px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.trust-item span{font-size:13px;color:var(--text-3);}

/* 价值区 编号长条 */
.value-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 var(--sp64);}
.value-item{
  display:flex;gap:var(--sp24);align-items:flex-start;
  padding:var(--sp32) 0;border-top:1px solid var(--line);min-height:160px;
}
.value-num{
  font-family:var(--font-mono);font-size:clamp(34px,3.6vw,52px);font-weight:600;line-height:1;
  letter-spacing:-.03em;color:var(--signal);flex:0 0 auto;font-variant-numeric:tabular-nums;
}
.value-item:nth-child(even) .value-num{color:var(--teal);}
.value-body h3{font-size:19px;font-weight:600;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.value-body h3 i{font-size:16px;color:var(--text-3);}
.value-body p{font-size:15px;color:var(--text-2);margin-bottom:0;line-height:1.75;}

/* 轮播 */
.shot-carousel{position:relative;}
.shot-slide{display:grid;grid-template-columns:7fr 5fr;gap:var(--sp48);align-items:center;}
.shot-img{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--s1);background:var(--paper);}
.shot-img img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.shot-text .badge-soft{margin-bottom:var(--sp16);}
.shot-text h3{font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:var(--sp16);letter-spacing:-.015em;}
.shot-text p{font-size:15px;color:var(--text-2);}
.shot-text .link-more{margin-top:var(--sp8);}
.carousel-controls{display:flex;align-items:center;justify-content:flex-end;gap:var(--sp24);margin-top:var(--sp32);}
.carousel-progress{flex:1 1 auto;height:2px;background:var(--divider);position:relative;overflow:hidden;border-radius:2px;}
.carousel-progress span{position:absolute;left:0;top:0;height:100%;background:var(--signal);width:0;transition:width 300ms ease;}
.carousel-index{font-family:var(--font-mono);font-size:14px;color:var(--text-2);font-variant-numeric:tabular-nums;letter-spacing:.06em;}
.carousel-index b{color:var(--ink);font-weight:600;}
.carousel-nav{display:flex;gap:8px;}
.carousel-nav button{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--white);
  color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background-color var(--ease),border-color var(--ease);
}
.carousel-nav button:hover{background:var(--paper);border-color:var(--ink);}

/* 规格 */
.spec-top{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp24);margin-bottom:var(--sp48);}
.spec-top div{border:1px solid var(--line);border-radius:var(--r-card);background:var(--white);padding:var(--sp24);}
.spec-top strong{display:block;font-family:var(--font-mono);font-size:30px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.spec-top span{font-size:13px;color:var(--text-3);}
.spec-wrap{display:grid;grid-template-columns:220px 1fr;gap:var(--sp32);align-items:start;}
.platform-tabs{display:flex;flex-direction:column;gap:8px;}
.platform-tabs button{
  text-align:left;padding:11px 18px;border-radius:var(--r-pill);border:1px solid transparent;background:transparent;
  font-size:14.5px;color:var(--text-2);cursor:pointer;transition:all var(--ease);display:flex;align-items:center;gap:10px;
}
.platform-tabs button:hover{background:var(--white);border-color:var(--line);color:var(--ink);}
.platform-tabs button.active{background:var(--ink);border-color:var(--ink);color:#fff;}
.spec-panel{display:none;border:1px solid var(--line);border-radius:var(--r-card);background:var(--white);overflow:hidden;}
.spec-panel.active{display:block;}
.spec-row{display:grid;grid-template-columns:140px 1fr 1fr;gap:var(--sp24);padding:14px 24px;min-height:52px;align-items:center;border-bottom:1px solid var(--divider);}
.spec-row:last-child{border-bottom:none;}
.spec-row .k{font-size:13.5px;color:var(--text-3);}
.spec-row .v{font-size:14.5px;color:var(--text-2);font-variant-numeric:tabular-nums;}
.spec-row .v.hl{color:var(--ink);font-weight:500;}
.spec-head{background:var(--paper);font-size:13px;color:var(--text-3);letter-spacing:.06em;}

/* 评价墙 */
.review-grid{columns:3;column-gap:var(--sp24);}
.review-card{
  break-inside:avoid;background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp24);margin-bottom:var(--sp24);box-shadow:var(--s1);transition:box-shadow var(--ease),transform var(--ease);
}
.review-card:hover{box-shadow:var(--s2);transform:translateY(-2px);}
.review-quote{font-family:var(--font-mono);font-size:40px;line-height:1;color:var(--signal);opacity:.25;margin-bottom:var(--sp8);}
.review-card p{font-size:15px;color:var(--ink-80);line-height:1.8;}
.review-foot{display:flex;align-items:center;gap:12px;margin-top:var(--sp16);padding-top:var(--sp16);border-top:1px solid var(--divider);}
.review-avatar{
  width:36px;height:36px;border-radius:50%;background:var(--paper);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:var(--text-2);flex:0 0 auto;
}
.review-foot .who{display:flex;flex-direction:column;line-height:1.4;}
.review-foot .who strong{font-size:14px;font-weight:600;}
.review-foot .who span{font-size:12px;color:var(--text-3);}
.review-foot .verify{margin-left:auto;font-size:11.5px;color:var(--teal);display:inline-flex;align-items:center;gap:5px;}

/* 资讯卡片 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp24);}
.news-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--s1);transition:box-shadow var(--ease),transform var(--ease);
}
.news-card:hover{box-shadow:var(--s3);transform:translateY(-2px);}
.news-thumb{display:block;overflow:hidden;aspect-ratio:16/10;background:var(--paper);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 240ms ease;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:var(--sp24);display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.news-body h3{font-size:17px;font-weight:600;line-height:1.5;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a:hover{color:var(--signal);}
.news-body p{font-size:14.5px;color:var(--text-2);line-height:1.7;margin-bottom:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--text-3);margin-top:auto;padding-top:var(--sp16);border-top:1px solid var(--divider);font-variant-numeric:tabular-nums;}
.empty-state{
  grid-column:1/-1;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--white);text-align:center;padding:var(--sp32);
}
.empty-state i{font-size:44px;color:var(--line);}
.empty-state p{color:var(--text-3);font-size:14.5px;margin:0;}

/* FAQ */
.faq-list{border-top:1px solid var(--line);max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:transparent;border:none;text-align:left;padding:24px 0;
  display:flex;align-items:center;gap:var(--sp16);cursor:pointer;
}
.faq-q h3{font-size:17px;font-weight:600;flex:1 1 auto;transition:color var(--ease);}
.faq-q .sign{
  width:28px;height:28px;flex:0 0 auto;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--text-2);font-size:13px;
  transition:transform var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
}
.faq-q[aria-expanded="true"] h3{color:var(--signal);}
.faq-q[aria-expanded="true"] .sign{background:var(--signal);border-color:var(--signal);color:#fff;transform:rotate(180deg);}
.faq-a{font-size:15px;color:var(--text-2);line-height:1.85;padding:0 44px 24px 0;}

/* CTA */
.cta-dark{background:var(--ink);color:#fff;border-radius:var(--r-block);padding:var(--sp96) var(--sp48);}
.cta-dark h2{color:#fff;font-size:clamp(24px,2.8vw,34px);letter-spacing:-.015em;margin-bottom:var(--sp16);}
.cta-dark p{color:rgba(255,255,255,.66);font-size:15px;max-width:640px;margin:0 auto var(--sp32);}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.cta-hash{
  margin-top:var(--sp32);font-family:var(--font-mono);font-size:12px;color:rgba(255,255,255,.6);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:center;word-break:break-all;
}
.section-dark-wrap{background:var(--paper);padding:0 0 var(--sp96);}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:var(--sp64) 0 var(--sp24);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--sp48);}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:rgba(255,255,255,.5);}
.footer-brand .brand-mark{background:var(--signal);}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin-top:var(--sp16);max-width:300px;}
.footer-social{display:flex;gap:10px;margin-top:var(--sp16);}
.footer-social a{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);font-size:14px;
  transition:all var(--ease);
}
.footer-social a:hover{background:var(--signal);border-color:var(--signal);color:#fff;}
.footer-col h4{font-size:13px;font-weight:500;letter-spacing:.14em;color:rgba(255,255,255,.5);margin-bottom:var(--sp16);}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.78);padding:5px 0;transition:color var(--ease),transform var(--ease);}
.footer-col a:hover{color:var(--signal);transform:translateX(2px);}
.footer-bottom{
  margin-top:var(--sp48);padding-top:var(--sp24);border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:var(--signal);}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 450ms cubic-bezier(.22,.61,.36,1),transform 450ms cubic-bezier(.22,.61,.36,1);}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* 断点 */
@media (max-width:1199px){
  .review-grid{columns:2;}
  .nav-center{max-width:480px;}
}
@media (max-width:991px){
  .container-x{padding:0 24px;}
  .section{padding:72px 0;}
  .nav-center{display:none;}
  .nav-icon-btn{display:flex;}
  .hero-inner{grid-template-columns:1fr;gap:var(--sp48);padding:72px 0 var(--sp48);}
  .hero-visual{max-width:560px;}
  .value-list{grid-template-columns:1fr;gap:0;}
  .shot-slide{grid-template-columns:1fr;gap:var(--sp24);}
  .spec-top{grid-template-columns:1fr;gap:16px;}
  .spec-wrap{grid-template-columns:1fr;}
  .platform-tabs{flex-direction:row;overflow-x:auto;padding-bottom:6px;}
  .platform-tabs button{flex:0 0 auto;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp32);}
  .cta-dark{padding:72px 24px;}
}
@media (max-width:767px){
  .review-grid{columns:1;}
  .news-grid{grid-template-columns:1fr;}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px;}
  .spec-row{grid-template-columns:110px 1fr;row-gap:2px;}
  .spec-row .v:last-child{grid-column:2;}
}
@media (max-width:519px){
  .container-x{padding:0 20px;}
  .section{padding:56px 0;}
  .hero h1{font-size:30px;}
  .hero-visual .front{position:static;width:100%;margin-top:12px;}
  .hero-actions .btn-mk{width:100%;}
  .cta-actions .btn-mk{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-dark{padding:56px 20px;}
}

/* roulang page: article */
:root{
  --ink:#14161A;
  --signal:#FF4A1C;
  --signal-h:#E63E12;
  --teal:#0E6E63;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --soft:#EFEDE8;
  --line:#E3E0D9;
  --line-dark:rgba(255,255,255,.14);
  --text:#14161A;
  --text-2:#6B6A66;
  --text-3:#96948E;
  --ok:#1F7A4D;
  --warn:#B4761B;
  --err:#C0392B;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;
  --s1:0 1px 2px rgba(20,22,26,.06);
  --s2:0 10px 30px -12px rgba(20,22,26,.16);
  --s3:0 18px 44px -16px rgba(20,22,26,.22);
  --sp-8:8px;
  --sp-12:12px;
  --sp-16:16px;
  --sp-24:24px;
  --sp-32:32px;
  --sp-48:48px;
  --sp-64:64px;
  --sp-96:96px;
  --container:1240px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
a:hover{color:var(--signal)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-.015em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.container-x{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--sp-32)}
.eyebrow{display:inline-block;font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--text-3);text-transform:uppercase}

/* 按钮 */
.btn-primary-x,.btn-ghost-x,.btn-light-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  cursor:pointer;transition:all .2s ease;white-space:nowrap;
}
.btn-primary-x{background:var(--signal);color:#fff}
.btn-primary-x:hover{background:var(--signal-h);color:#fff;transform:translateY(-1px);box-shadow:var(--s2)}
.btn-primary-x:active{transform:translateY(0)}
.btn-primary-x i{transition:transform .2s ease}
.btn-primary-x:hover i{transform:translateX(4px)}
.btn-ghost-x{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost-x:hover{background:rgba(20,22,26,.08);color:var(--ink)}
.btn-light-x{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-light-x:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm-x{height:40px;padding:0 16px;font-size:14px}
.btn-lg-x{height:56px;padding:0 30px;font-size:16px}

/* 徽章 */
.badge-cat{display:inline-flex;align-items:center;gap:6px;background:rgba(255,74,28,.1);color:var(--signal-h);font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill)}
.badge-teal{display:inline-flex;align-items:center;gap:6px;background:rgba(14,110,99,.1);color:var(--teal);font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill)}

/* 顶部阅读进度 */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--signal);z-index:1200;transition:width .1s linear}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:1100;background:rgba(247,246,243,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:grid;grid-template-columns:auto minmax(320px,1fr) auto;align-items:center;gap:var(--sp-24);height:88px;transition:height .2s ease}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--signal);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;letter-spacing:.02em}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:-.01em}
.brand-text span{font-size:11.5px;color:var(--text-3);letter-spacing:.04em}
.nav-search{position:relative;display:flex;align-items:center;height:48px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:0 6px 0 44px;transition:border-color .2s ease,box-shadow .2s ease}
.nav-search:focus-within{border-color:var(--ink);box-shadow:0 0 0 2px rgba(255,74,28,.12)}
.nav-search > i{position:absolute;left:18px;font-size:15px;color:var(--text-3)}
.nav-search input{flex:1;border:0;background:transparent;height:44px;font-size:15px;color:var(--text);outline:none;min-width:0}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search button{flex:0 0 auto;height:36px;padding:0 18px;border:0;border-radius:var(--r-pill);background:var(--signal);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s ease}
.nav-search button:hover{background:var(--signal-h)}
.nav-actions{display:flex;align-items:center;gap:var(--sp-12)}
.nav-actions .btn-ghost-x{height:42px;padding:0 16px;font-size:14px}
.nav-actions .btn-primary-x{height:42px;padding:0 18px;font-size:14px}
.nav-search-btn{display:none;width:42px;height:42px;border-radius:var(--r-btn);border:1.5px solid var(--ink);background:transparent;color:var(--ink);font-size:15px;cursor:pointer}
.btn-text-short{display:none}
.cat-pills{display:flex;gap:var(--sp-8);max-width:var(--container);margin:0 auto;padding:0 var(--sp-32) 12px;overflow-x:auto;scrollbar-width:none}
.cat-pills::-webkit-scrollbar{display:none}
.cat-pills a{flex:0 0 auto;font-size:13.5px;color:var(--text-2);background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 16px}
.cat-pills a:hover{color:var(--ink);border-color:var(--ink)}
.cat-pills a.active{background:var(--ink);border-color:var(--ink);color:#fff}
.mobile-search{display:none;max-height:0;overflow:hidden;transition:max-height .22s ease}
.mobile-search.open{max-height:90px}
.mobile-search .nav-search{margin:0 var(--sp-32) 14px}

/* 内页横幅 */
.page-hero{
  position:relative;color:#fff;padding:52px 0 44px;
  background-image:linear-gradient(rgba(20,22,26,.74),rgba(20,22,26,.74)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero h1,.page-hero h2{color:#fff}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.7);margin-bottom:16px}
.crumb a{color:rgba(255,255,255,.72)}
.crumb a:hover{color:var(--signal)}
.crumb i{font-size:10px;opacity:.6}
.hero-line{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.hero-line .badge-cat{background:rgba(255,74,28,.18);color:#FFB49B}
.hero-line .badge-teal{background:rgba(255,255,255,.14);color:#fff}
.hero-note{font-size:14px;color:rgba(255,255,255,.72);margin-top:12px;max-width:760px}

/* 正文布局 */
.article-wrap{padding:var(--sp-64) 0 var(--sp-96)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:40px;align-items:start}
.article-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--s1);padding:48px 56px 40px}
.article-card h1{font-size:clamp(26px,3vw,38px);line-height:1.3;letter-spacing:-.02em}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin:20px 0 0;padding-bottom:24px;border-bottom:1px solid var(--line);font-size:13.5px;color:var(--text-3)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-body{margin-top:32px;font-size:16px;line-height:1.9;color:#22242A}
.article-body p{margin:0 0 1.5em}
.article-body h2{font-size:clamp(21px,2.1vw,27px);line-height:1.4;margin:48px 0 16px;letter-spacing:-.015em;scroll-margin-top:110px}
.article-body h3{font-size:18px;line-height:1.5;margin:32px 0 12px}
.article-body h4{font-size:16px;margin:24px 0 10px}
.article-body ul{margin:0 0 1.5em;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.6em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--signal)}
.article-body ol{margin:0 0 1.5em;padding-left:22px;list-style:decimal}
.article-body ol li{margin-bottom:.6em}
.article-body a{color:var(--signal-h);border-bottom:1px solid rgba(255,74,28,.35)}
.article-body a:hover{border-bottom-color:var(--signal-h)}
.article-body blockquote{margin:0 0 1.5em;padding:16px 22px;background:var(--paper);border-left:3px solid var(--signal);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--text-2)}
.article-body img{border-radius:var(--r-img);margin:8px 0 24px;border:1px solid var(--line)}
.article-body code{font-family:var(--mono);font-size:.88em;background:var(--soft);color:var(--ink);padding:2px 6px;border-radius:6px}
.article-body pre{background:var(--ink);color:#F2F1EE;padding:20px 22px;border-radius:var(--r-img);overflow-x:auto;font-size:14px;line-height:1.7;margin:0 0 1.5em}
.article-body pre code{background:transparent;color:inherit;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 1.5em;font-size:15px}
.article-body th,.article-body td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body th{background:var(--paper);font-weight:600;color:var(--text-2);font-size:14px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

.empty-state{text-align:center;padding:64px 0 48px;border:1px dashed var(--line);border-radius:var(--r-card);background:var(--paper)}
.empty-state i{font-size:56px;color:var(--text-3);opacity:.6}
.empty-state p{margin:16px 0 22px;color:var(--text-2)}

.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line)}
.tag-row .tag-title{font-size:13px;color:var(--text-3);letter-spacing:.08em;margin-right:4px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);background:var(--paper);border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px}
.tag:hover{color:var(--signal-h);border-color:rgba(255,74,28,.45)}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:var(--sp-24);position:sticky;top:96px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);padding:24px}
.side-card h2{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--text-3);margin-bottom:16px}
.toc-list a{display:block;font-size:14px;color:var(--text-2);padding:8px 0 8px 14px;border-left:2px solid var(--line);line-height:1.6}
.toc-list a:hover{color:var(--ink);border-left-color:var(--ink)}
.toc-list a.current{color:var(--signal-h);border-left-color:var(--signal);font-weight:600}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;color:var(--text-2);padding:11px 0;border-bottom:1px solid var(--soft)}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--signal-h)}
.side-links a i{font-size:12px;color:var(--text-3)}

/* 相关推荐 */
.rel-section{padding:0 0 var(--sp-96)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-24);margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.4vw,30px)}
.section-head p{font-size:14px;color:var(--text-2);margin-top:6px}
.head-link{font-size:14px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.head-link:hover{color:var(--signal-h)}
.head-link i{transition:transform .2s ease}
.head-link:hover i{transform:translateX(4px)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-24)}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--s1);transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--s3)}
.news-figure{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--soft)}
.news-figure img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-figure img{transform:scale(1.03)}
.news-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:17.5px;line-height:1.5}
.news-card:hover .news-body h3{color:var(--signal-h)}
.news-body p{font-size:14.5px;color:var(--text-2);line-height:1.7}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);padding-top:14px;border-top:1px solid var(--soft)}

/* 分类入口 */
.cat-entry{padding:0 0 var(--sp-96)}
.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-24)}
.entry-card{position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:240px;display:flex;align-items:flex-end;color:#fff;border:1px solid var(--line);box-shadow:var(--s1)}
.entry-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.entry-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,22,26,.15),rgba(20,22,26,.82))}
.entry-inner{position:relative;z-index:2;padding:28px 30px}
.entry-inner h3{color:#fff;font-size:21px;margin-bottom:8px}
.entry-inner p{font-size:14px;color:rgba(255,255,255,.78);max-width:420px}
.entry-inner .entry-cta{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:14px;font-weight:600;color:#fff;border-bottom:1px solid rgba(255,255,255,.45);padding-bottom:3px}
.entry-card:hover .entry-cta{color:var(--signal);border-bottom-color:var(--signal)}

/* 深色 CTA */
.cta-dark{background:var(--ink);color:#fff;padding:var(--sp-96) 0;border-top:1px solid var(--line-dark)}
.cta-dark h2{color:#fff;font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.cta-dark p{color:rgba(255,255,255,.72);font-size:15.5px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-verify{margin-top:26px;font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.6);letter-spacing:.02em}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:var(--sp-64) 0 var(--sp-48)}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text span{color:rgba(255,255,255,.5)}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.62);max-width:320px;line-height:1.75}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{width:38px;height:38px;border:1px solid rgba(255,255,255,.2);border-radius:11px;display:inline-flex;align-items:center;justify-content:center;color:#fff}
.footer-social a:hover{background:var(--signal);border-color:var(--signal);color:#fff}
.footer-col h4{font-size:12.5px;font-weight:600;letter-spacing:.12em;color:rgba(255,255,255,.5);margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.72);padding:5px 0}
.footer-col a:hover{color:var(--signal);transform:translateX(2px)}
.footer-bottom{border-top:1px solid var(--line-dark);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5)}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .45s cubic-bezier(.22,.61,.36,1),transform .45s cubic-bezier(.22,.61,.36,1)}

/* 响应式 */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{display:none}
}
@media (max-width:991px){
  .container-x{padding:0 20px}
  .header-inner{grid-template-columns:auto auto;justify-content:space-between;gap:12px;height:72px}
  .site-header.is-scrolled .header-inner{height:64px}
  .nav-search{display:none}
  .nav-search-btn{display:inline-flex;align-items:center;justify-content:center}
  .nav-actions .btn-ghost-x{display:none}
  .cat-pills{padding:0 20px 12px;justify-content:flex-start}
  .mobile-search{display:block}
  .mobile-search .nav-search{margin:0 20px 14px}
  .page-hero{padding:40px 0 32px}
  .article-wrap{padding:var(--sp-48) 0 var(--sp-64)}
  .article-card{padding:32px 26px 28px;border-radius:var(--r-card)}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .entry-grid{grid-template-columns:minmax(0,1fr)}
  .cta-dark{padding:64px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:48px 0 32px}
  .btn-text-full{display:none}
  .btn-text-short{display:inline}
}
@media (max-width:575px){
  body{font-size:15.5px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:14px}
  .brand-text strong{font-size:16px}
  .article-card{padding:24px 18px 24px}
  .article-body{font-size:15.5px}
  .article-body h2{margin-top:36px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-actions .btn-primary-x,.cta-actions .btn-light-x{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --bs-body-font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --bs-body-color:#14161A;
  --bs-body-bg:#F7F6F3;
  --bs-border-color:#E3E0D9;
  --bs-link-color:#14161A;
  --bs-link-hover-color:#FF4A1C;
  --bs-primary:#FF4A1C;

  --ink:#14161A;
  --ink-soft:#2A2D33;
  --signal:#FF4A1C;
  --signal-hover:#E63E12;
  --signal-10:rgba(255,74,28,.10);
  --teal:#0E6E63;
  --teal-10:rgba(14,110,99,.10);
  --paper:#F7F6F3;
  --white:#FFFFFF;
  --divider-block:#EFEDE8;
  --text-2:#6B6A66;
  --text-3:#96948E;
  --line:#E3E0D9;
  --success:#1F7A4D;
  --warn:#B4761B;
  --error:#C0392B;

  --r-card:16px;
  --r-lg:24px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;

  --s1:0 1px 2px rgba(20,22,26,.06);
  --s2:0 10px 30px -12px rgba(20,22,26,.16);
  --s3:0 18px 44px -16px rgba(20,22,26,.22);

  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
  --container:1240px;
  --mono:Inter,ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--signal);}
button,input{font:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.015em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;border-radius:6px;}

.container-x{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ---------- 顶部滚动进度 ---------- */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--signal);z-index:2000;transition:width .1s linear;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,246,243,.94);
  border-bottom:1px solid var(--line);
  transition:background .2s ease,backdrop-filter .2s ease;
}
.site-header.is-scrolled{background:rgba(247,246,243,.86);backdrop-filter:saturate(180%) blur(10px);}
.header-main{display:flex;align-items:center;gap:20px;padding:18px 0;transition:padding .2s ease;}
.site-header.is-scrolled .header-main{padding:10px 0;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:700;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.06em;}

.header-quick{flex:0 0 auto;}
.header-quick a{font-size:13px;color:var(--text-2);padding:6px 2px;border-bottom:1.5px solid transparent;}
.header-quick a:hover{color:var(--ink);border-bottom-color:var(--signal);}

.nav-search{
  position:relative;display:flex;align-items:center;
  flex:1 1 auto;max-width:540px;margin:0 auto;height:48px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:0 6px 0 18px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{border-color:var(--ink);box-shadow:0 0 0 2px rgba(255,74,28,.12);}
.nav-search > i{color:var(--text-3);font-size:15px;flex:0 0 auto;}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;outline:0;background:transparent;
  padding:0 12px;font-size:14px;color:var(--ink);
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search button{
  flex:0 0 auto;height:36px;padding:0 18px;border:0;border-radius:var(--r-pill);
  background:var(--ink);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
  transition:background .18s ease;
}
.nav-search button:hover{background:var(--signal);}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

.btn-signal{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  background:var(--signal);color:#fff;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-signal:hover{background:var(--signal-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--s2);}
.btn-signal:active{transform:none;}
.btn-signal i{transition:transform .18s ease;}
.btn-signal:hover i{transform:translateX(4px);}
.btn-signal.btn-lg{height:56px;padding:0 30px;font-size:16px;}
.btn-signal.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  border:1.5px solid var(--ink);color:var(--ink);background:transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.btn-line:hover{background:rgba(20,22,26,.08);color:var(--ink);}
.btn-line.btn-sm{height:40px;padding:0 16px;font-size:14px;}

.cat-pills{display:flex;gap:8px;padding:0 0 14px;overflow-x:auto;scrollbar-width:none;}
.cat-pills::-webkit-scrollbar{display:none;}
.cat-pills a{
  flex:0 0 auto;white-space:nowrap;font-size:13px;padding:7px 16px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:var(--white);
  color:var(--text-2);transition:all .18s ease;
}
.cat-pills a:hover{border-color:var(--ink);color:var(--ink);}
.cat-pills a.active{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600;}

/* ---------- 通用区块 ---------- */
.section{padding:var(--sp-9) 0;}
.section-alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:var(--sp-7);}
.section-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;letter-spacing:-.015em;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:500;letter-spacing:.14em;
  color:var(--teal);margin-bottom:14px;
}
.section-flat{padding:0;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  padding:40px 0 80px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(247,246,243,.97) 0%,rgba(247,246,243,.93) 55%,rgba(247,246,243,1) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3);}
.breadcrumb-x a{color:var(--text-2);}
.breadcrumb-x a:hover{color:var(--signal);}
.breadcrumb-x span[aria-current]{color:var(--ink);font-weight:600;}

.cat-hero-grid{
  display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:56px;align-items:center;margin-top:36px;
}
.cat-hero h1{font-size:clamp(32px,4.4vw,54px);line-height:1.12;letter-spacing:-.02em;margin-bottom:18px;}
.cat-hero-desc{font-size:17px;line-height:1.85;color:var(--text-2);max-width:40em;}

.cat-stats{
  display:flex;flex-wrap:wrap;gap:40px;margin:30px 0 32px;
  padding-top:24px;border-top:1px solid var(--line);
}
.cat-stats > div{display:flex;flex-direction:column;}
.cat-stats strong{
  font-size:26px;font-weight:700;line-height:1.2;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;font-family:var(--mono);
}
.cat-stats span{font-size:13px;color:var(--text-3);}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}

.cat-hero-media{position:relative;}
.cat-hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line);box-shadow:var(--s2);
}
.hero-media-tag{
  position:absolute;left:20px;bottom:20px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);
  background:rgba(20,22,26,.86);color:#fff;font-size:12.5px;
  font-variant-numeric:tabular-nums;
}
.hero-media-tag i{color:var(--signal);}

/* ---------- 编号长条 ---------- */
.point-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 64px;}
.point-item{
  display:flex;gap:24px;padding:32px 0;min-height:160px;
  border-top:1px solid var(--line);
}
.point-item .num{
  flex:0 0 auto;font-family:var(--mono);font-size:40px;font-weight:700;
  line-height:1;letter-spacing:-.03em;color:var(--signal);font-variant-numeric:tabular-nums;
}
.point-item:nth-child(2n) .num{color:var(--teal);}
.point-item h3{font-size:19px;font-weight:600;margin-bottom:8px;letter-spacing:-.01em;}
.point-item p{font-size:15px;line-height:1.75;color:var(--text-2);}

/* ---------- 场景卡片 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.scene-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--s1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--s3);}
.scene-card i{font-size:20px;color:var(--teal);margin-bottom:16px;display:block;}
.scene-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.scene-card p{font-size:15px;line-height:1.75;color:var(--text-2);}

/* ---------- 安装流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.flow-step{border-top:2px solid var(--line);padding-top:22px;}
.flow-step.on{border-top-color:var(--signal);}
.flow-step .step-num{
  display:inline-block;font-family:var(--mono);font-size:13px;font-weight:600;
  color:var(--signal);letter-spacing:.06em;margin-bottom:10px;
}
.flow-step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.flow-step p{font-size:14.5px;line-height:1.75;color:var(--text-2);}

/* ---------- 规格面板 ---------- */
.spec-bar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:28px;}
.spec-bar > div{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 24px;box-shadow:var(--s1);
}
.spec-bar strong{
  display:block;font-family:var(--mono);font-size:28px;font-weight:700;
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.2;
}
.spec-bar span{font-size:13px;color:var(--text-3);}

.spec-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--s1);}
.spec-tabs{display:flex;flex-wrap:wrap;gap:8px;padding:18px 24px;border-bottom:1px solid var(--line);}
.spec-tab{
  border:0;background:transparent;padding:8px 18px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.spec-tab:hover{background:var(--divider-block);color:var(--ink);}
.spec-tab.active{background:var(--ink);color:#fff;}
.kv-head,.kv-row{
  display:grid;grid-template-columns:200px minmax(0,1fr) minmax(0,1fr);
  gap:24px;padding:16px 24px;align-items:center;
}
.kv-head{
  font-size:12.5px;letter-spacing:.1em;color:var(--text-3);
  background:var(--paper);border-bottom:1px solid var(--line);
}
.kv-row{border-bottom:1px solid var(--line);min-height:52px;font-size:14.5px;}
.kv-row:last-child{border-bottom:0;}
.kv-row .k{color:var(--ink);font-weight:600;}
.kv-row .v{color:var(--text-2);font-variant-numeric:tabular-nums;}

/* ---------- 筛选条 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;padding:16px 20px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--white);margin-bottom:32px;
}
.filter-chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--white);font-size:13px;color:var(--text-2);
}
.chip.active{background:var(--signal-10);border-color:rgba(255,74,28,.3);color:var(--signal);font-weight:600;}
.filter-note{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}

/* ---------- 资源卡片网格 ---------- */
.res-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.res-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.res-card:hover{transform:translateY(-2px);box-shadow:var(--s3);}
.res-media{overflow:hidden;aspect-ratio:16/10;background:var(--divider-block);}
.res-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.res-card:hover .res-media img{transform:scale(1.03);}
.res-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.badge-cat{
  align-self:flex-start;display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;padding:4px 12px;border-radius:var(--r-pill);
  background:var(--teal-10);color:var(--teal);
}
.badge-cat.signal{background:var(--signal-10);color:var(--signal);}
.res-body h3{font-size:18px;font-weight:600;line-height:1.45;}
.res-card:hover .res-body h3{color:var(--signal);}
.res-body p{font-size:14.5px;line-height:1.75;color:var(--text-2);}
.res-meta{
  margin-top:auto;display:flex;flex-wrap:wrap;gap:14px;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);font-variant-numeric:tabular-nums;
}
.res-meta span{display:inline-flex;align-items:center;gap:6px;}

.res-card--feature{grid-column:1 / -1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);}
.res-card--feature .res-media{aspect-ratio:auto;height:100%;min-height:320px;}
.res-card--feature .res-body{padding:36px;gap:14px;}
.res-card--feature .res-body h3{font-size:clamp(20px,2.2vw,26px);}

/* ---------- 相关分类 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:26px 28px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--s1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--s3);border-color:rgba(255,74,28,.4);color:var(--ink);}
.rel-card h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.rel-card p{font-size:14px;color:var(--text-2);}
.rel-card i{color:var(--signal);font-size:16px;transition:transform .2s ease;}
.rel-card:hover i{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{border:0;border-top:1px solid var(--line);background:transparent;}
.faq-accordion .accordion-item:last-child{border-bottom:1px solid var(--line);}
.faq-accordion .accordion-button{
  background:transparent;box-shadow:none;border:0;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--signal);background:transparent;box-shadow:none;}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--signal);outline-offset:2px;}
.faq-accordion .accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;margin-left:auto;
  font-size:20px;font-weight:400;line-height:1;color:var(--text-3);
  display:grid;place-items:center;transform:none;
  transition:transform .2s ease,color .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";color:var(--signal);transform:rotate(180deg);}
.faq-accordion .accordion-body{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:52em;}

/* ---------- 深色 CTA ---------- */
.cta-band{
  background:var(--ink);color:#fff;padding:88px 0;
  background-image:linear-gradient(120deg,rgba(20,22,26,.94) 0%,rgba(20,22,26,.88) 100%),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
}
.cta-band h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;margin-bottom:16px;}
.cta-band p{color:rgba(255,255,255,.72);font-size:16px;max-width:44em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.btn-line-invert{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  border:1.5px solid rgba(255,255,255,.42);color:#fff;background:transparent;
  font-size:15px;font-weight:600;transition:background .18s ease,border-color .18s ease;
}
.btn-line-invert:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;}
.cta-verify{
  margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.6);
  word-break:break-all;line-height:1.9;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;
}
.site-footer .brand-mark{background:var(--signal);}
.site-footer .brand-text strong{color:#fff;}
.site-footer .brand-text span{color:rgba(255,255,255,.5);}
.footer-brand p{
  color:rgba(255,255,255,.62);font-size:14px;line-height:1.8;
  max-width:34em;margin:18px 0 20px;
}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:36px;height:36px;border-radius:10px;border:1px solid rgba(255,255,255,.14);
  display:grid;place-items:center;color:rgba(255,255,255,.8);font-size:14px;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.footer-social a:hover{background:var(--signal);border-color:var(--signal);color:#fff;}
.footer-col h4{
  font-size:13px;font-weight:500;letter-spacing:.1em;
  color:rgba(255,255,255,.55);margin-bottom:16px;
}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.82);
  padding:6px 0;transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:var(--signal);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  border-top:1px solid rgba(255,255,255,.14);padding:22px 0;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .45s cubic-bezier(.22,.61,.36,1),transform .45s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .res-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991px){
  .container-x{padding:0 20px;}
  .header-main{flex-wrap:wrap;gap:12px;padding:14px 0;}
  .header-quick{display:none;}
  .nav-search{order:3;flex:1 0 100%;max-width:none;margin:0;}
  .header-actions .btn-line{display:none;}
  .cat-hero{padding:28px 0 60px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;margin-top:28px;}
  .cat-stats{gap:28px;}
  .point-list{grid-template-columns:1fr;gap:0;}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .spec-bar{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767px){
  .section{padding:72px 0;}
  .cta-band{padding:64px 0;}
  .res-grid{grid-template-columns:1fr;}
  .res-card--feature{grid-template-columns:1fr;}
  .res-card--feature .res-media{min-height:220px;}
  .res-card--feature .res-body{padding:24px;}
  .rel-grid{grid-template-columns:1fr;}
  .kv-head{display:none;}
  .kv-row{grid-template-columns:1fr;gap:4px;padding:16px 20px;}
  .kv-row .v::before{content:attr(data-label)"：";color:var(--text-3);font-size:13px;}
  .kv-row .v + .v{margin-top:6px;}
  .filter-bar{align-items:flex-start;}
}
@media (max-width:575px){
  .section{padding:56px 0;}
  .brand-text span{display:none;}
  .brand-text strong{font-size:16px;}
  .cat-hero h1{font-size:30px;}
  .cat-stats strong{font-size:22px;}
  .scene-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn-signal,.hero-actions .btn-line{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn-signal,.cta-actions .btn-line-invert{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .point-item .num{font-size:32px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#14161A;
  --ink-soft:#2A2D33;
  --signal:#FF4A1C;
  --signal-hover:#E63E12;
  --signal-soft:rgba(255,74,28,.10);
  --teal:#0E6E63;
  --teal-soft:rgba(14,110,99,.10);
  --paper:#F7F6F3;
  --white:#FFFFFF;
  --divider:#EFEDE8;
  --line:#E3E0D9;
  --text-1:#14161A;
  --text-2:#6B6A66;
  --text-3:#96948E;
  --ok:#1F7A4D;
  --warn:#B4761B;
  --err:#C0392B;
  --r-card:16px;
  --r-block:24px;
  --r-btn:10px;
  --r-img:14px;
  --pill:999px;
  --s1:0 1px 2px rgba(20,22,26,.06);
  --s2:0 10px 30px -12px rgba(20,22,26,.16);
  --s3:0 18px 44px -16px rgba(20,22,26,.22);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px;
  --sp-7:48px; --sp-8:64px; --sp-9:96px; --sp-10:120px;
  --font-cn:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--text-1);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink);text-decoration:none;}
a:hover{color:var(--signal);}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.015em;color:var(--ink);}
p{margin:0 0 1.5em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}

.container-x{max-width:1240px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section--white{background:var(--white);}
.section--tight{padding:72px 0;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--teal);
  margin-bottom:var(--sp-4);
}
.section-head{margin-bottom:var(--sp-7);}
.section-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.25;}
.section-head p{margin-top:var(--sp-3);color:var(--text-2);font-size:16px;max-width:720px;}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--signal);z-index:2000;transition:width .1s linear;
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(247,246,243,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:height .2s ease, background .2s ease;
}
.header-main{
  display:flex;align-items:center;justify-content:space-between;
  gap:var(--sp-5);height:88px;transition:height .2s ease;
}
.site-header.is-compact .header-main{height:64px;}
.header-left{display:flex;align-items:center;gap:var(--sp-5);flex:0 0 auto;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-weight:700;font-size:15px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:-.01em;}
.brand-text span{font-size:12px;color:var(--text-3);letter-spacing:.04em;}
.header-sub-link{
  font-size:14px;color:var(--text-2);position:relative;padding-bottom:2px;
  background-image:linear-gradient(var(--signal),var(--signal));
  background-repeat:no-repeat;background-size:0 1px;background-position:0 100%;
  transition:background-size .2s ease,color .2s ease;
}
.header-sub-link:hover{color:var(--ink);background-size:100% 1px;}

.header-center{flex:1 1 auto;max-width:620px;display:flex;flex-direction:column;align-items:center;gap:10px;}
.search-box{
  position:relative;display:flex;align-items:center;width:100%;max-width:560px;
  height:48px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--pill);padding:0 6px 0 18px;transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box i{color:var(--text-3);font-size:15px;margin-right:10px;}
.search-box input{
  flex:1;border:0;background:transparent;outline:none;height:100%;
  font-size:14px;color:var(--text-1);
}
.search-box input::placeholder{color:var(--text-3);font-size:14px;}
.search-box button{
  border:0;background:var(--ink);color:#fff;height:36px;padding:0 18px;
  border-radius:var(--pill);font-size:13px;font-weight:600;cursor:pointer;
  transition:background .18s ease;
}
.search-box button:hover{background:var(--signal);}
.search-box:focus-within{border-color:var(--ink);box-shadow:0 0 0 2px rgba(255,74,28,.12);}

.cat-pills{display:flex;align-items:center;gap:var(--sp-2);flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;max-width:100%;}
.cat-pills::-webkit-scrollbar{display:none;}
.cat-pills a{
  white-space:nowrap;font-size:13px;color:var(--text-2);
  padding:5px 14px;border-radius:var(--pill);border:1px solid transparent;
  transition:all .18s ease;
}
.cat-pills a:hover{color:var(--ink);background:var(--white);border-color:var(--line);}
.cat-pills a.active{background:var(--ink);color:#fff;border-color:var(--ink);}

.header-right{display:flex;align-items:center;gap:var(--sp-3);flex:0 0 auto;}
.btn-ghost-sm,.btn-signal-sm{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 18px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;transition:all .18s ease;white-space:nowrap;
}
.btn-ghost-sm{border:1.5px solid var(--ink);color:var(--ink);background:transparent;}
.btn-ghost-sm:hover{background:rgba(20,22,26,.08);color:var(--ink);}
.btn-signal-sm{background:var(--signal);color:#fff;border:1.5px solid var(--signal);}
.btn-signal-sm:hover{background:var(--signal-hover);border-color:var(--signal-hover);color:#fff;transform:translateY(-1px);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--white);color:var(--ink);align-items:center;justify-content:center;cursor:pointer;
}

.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--white);padding:var(--sp-4) 0 var(--sp-5);
}
.mobile-drawer.open{display:block;}
.mobile-drawer .cat-pills{margin-top:var(--sp-4);gap:var(--sp-3);}
.mobile-drawer .header-right{margin-top:var(--sp-5);flex-wrap:wrap;}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{padding:20px 0 0;font-size:13px;color:var(--text-3);}
.breadcrumb-bar a{color:var(--text-2);}
.breadcrumb-bar a:hover{color:var(--signal);}
.breadcrumb-bar span.sep{margin:0 8px;color:var(--line);}
.breadcrumb-bar span.cur{color:var(--ink);}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;padding:56px 0 64px;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,246,243,.94) 0%,rgba(247,246,243,.86) 55%,rgba(247,246,243,.98) 100%);
}
.cat-hero .container-x{position:relative;z-index:2;}
.cat-hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:var(--sp-8);align-items:center;}
.cat-hero h1{
  font-size:clamp(34px,5.2vw,58px);line-height:1.1;letter-spacing:-.02em;margin-bottom:var(--sp-4);
}
.cat-hero h1 em{font-style:normal;color:var(--teal);}
.cat-hero .lead{font-size:17px;color:var(--text-2);max-width:620px;margin-bottom:var(--sp-5);}
.cat-meta-line{font-family:var(--font-num);font-size:13px;color:var(--text-3);letter-spacing:.01em;}
.cat-meta-line span{margin-right:8px;}
.hero-figure{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-img);
  overflow:hidden;box-shadow:var(--s2);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- 统计条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--white);
}
.stat-strip .stat{padding:var(--sp-6) var(--sp-5);border-right:1px solid var(--line);}
.stat-strip .stat:last-child{border-right:0;}
.stat .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;color:var(--ink);letter-spacing:-.02em;}
.stat .lbl{font-size:13px;color:var(--text-3);margin-top:4px;}
.stat .num.teal{color:var(--teal);}
.stat .num.signal{color:var(--signal);}

/* ---------- 主体：筛选 + 列表流 ---------- */
.stream-layout{display:grid;grid-template-columns:264px 1fr;gap:var(--sp-8);align-items:start;}
.filter-panel{
  position:sticky;top:104px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp-5);box-shadow:var(--s1);
}
.filter-panel h3{font-size:15px;margin-bottom:var(--sp-4);letter-spacing:-.01em;}
.filter-group{margin-bottom:var(--sp-5);}
.filter-group:last-child{margin-bottom:0;}
.filter-group .fg-title{
  font-size:12px;letter-spacing:.1em;color:var(--text-3);margin-bottom:var(--sp-3);
}
.chip-row{display:flex;flex-wrap:wrap;gap:var(--sp-2);}
.chip{
  border:1px solid var(--line);background:var(--paper);color:var(--text-2);
  font-size:13px;padding:5px 13px;border-radius:var(--pill);cursor:pointer;
  transition:all .18s ease;
}
.chip:hover{border-color:var(--teal);color:var(--teal);}
.chip.active{background:var(--teal);border-color:var(--teal);color:#fff;}
.filter-note{font-size:13px;color:var(--text-3);line-height:1.7;border-top:1px solid var(--divider);padding-top:var(--sp-4);}

.stream-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-4);
  padding-bottom:var(--sp-4);border-bottom:1px solid var(--line);margin-bottom:var(--sp-5);
}
.stream-head h2{font-size:24px;}
.stream-head .sortline{font-size:13px;color:var(--text-3);font-family:var(--font-num);}

.stream-item{
  display:grid;grid-template-columns:160px 1fr;gap:var(--sp-5);
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp-4);margin-bottom:var(--sp-4);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.stream-item:hover{transform:translateY(-2px);box-shadow:var(--s3);border-color:#D8D4CB;}
.stream-thumb{border-radius:12px;overflow:hidden;background:var(--divider);}
.stream-thumb img{width:160px;height:120px;object-fit:cover;transition:transform .35s ease;}
.stream-item:hover .stream-thumb img{transform:scale(1.03);}
.stream-body{display:flex;flex-direction:column;justify-content:center;}
.badge-row{display:flex;flex-wrap:wrap;gap:var(--sp-2);margin-bottom:10px;}
.badge{
  font-size:12px;padding:3px 11px;border-radius:var(--pill);letter-spacing:.02em;
}
.badge.teal{background:var(--teal-soft);color:var(--teal);}
.badge.signal{background:var(--signal-soft);color:var(--signal);}
.badge.ink{background:rgba(20,22,26,.07);color:var(--ink-soft);}
.stream-body h3{font-size:18px;line-height:1.45;margin-bottom:8px;}
.stream-item:hover .stream-body h3{color:var(--teal);}
.stream-body p{font-size:15px;color:var(--text-2);line-height:1.75;margin-bottom:12px;}
.stream-foot{
  display:flex;flex-wrap:wrap;gap:var(--sp-4);align-items:center;
  font-size:13px;color:var(--text-3);font-family:var(--font-num);
}
.stream-foot .hash{
  background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:2px 8px;font-size:12px;color:var(--text-2);word-break:break-all;
}
.pager{display:flex;justify-content:center;gap:var(--sp-2);margin-top:var(--sp-6);}
.pager a,.pager span{
  min-width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:var(--white);
  font-size:14px;color:var(--text-2);font-family:var(--font-num);transition:all .18s ease;
}
.pager a:hover{border-color:var(--teal);color:var(--teal);}
.pager .cur{background:var(--ink);border-color:var(--ink);color:#fff;}
.pager .dots{border-color:transparent;background:transparent;}

/* ---------- 升级流程 ---------- */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-5);}
.flow-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp-5);box-shadow:var(--s1);position:relative;
  transition:transform .2s ease,box-shadow .2s ease;
}
.flow-card:hover{transform:translateY(-2px);box-shadow:var(--s3);}
.flow-card .idx{
  font-family:var(--font-num);font-size:32px;font-weight:700;color:var(--teal);
  opacity:.35;line-height:1;margin-bottom:var(--sp-4);letter-spacing:-.03em;
}
.flow-card h3{font-size:17px;margin-bottom:10px;}
.flow-card p{font-size:14px;color:var(--text-2);line-height:1.75;margin:0;}

/* ---------- 系统要求 ---------- */
.spec-list{border-top:1px solid var(--line);}
.spec-row{
  display:grid;grid-template-columns:180px 1fr 1fr;gap:var(--sp-5);
  padding:var(--sp-4) 0;border-bottom:1px solid var(--line);align-items:baseline;
}
.spec-row .plat{font-weight:600;font-size:16px;display:flex;align-items:center;gap:10px;}
.spec-row .plat i{color:var(--teal);font-size:15px;width:18px;text-align:center;}
.spec-row .k{font-size:13px;color:var(--text-3);display:block;margin-bottom:2px;letter-spacing:.04em;}
.spec-row .v{font-size:14px;color:var(--text-1);font-family:var(--font-num);}

/* ---------- 相关分类 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--sp-5);}
.related-card{
  display:block;background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--sp-6);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--s3);border-color:#D8D4CB;}
.related-card .rc-tag{font-size:12px;letter-spacing:.1em;color:var(--teal);}
.related-card h3{font-size:20px;margin:var(--sp-3) 0 var(--sp-3);}
.related-card p{font-size:15px;color:var(--text-2);margin-bottom:var(--sp-4);}
.related-card .rc-link{font-size:14px;font-weight:600;color:var(--ink);}
.related-card .rc-link i{margin-left:6px;transition:transform .2s ease;}
.related-card:hover .rc-link{color:var(--signal);}
.related-card:hover .rc-link i{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.mk-faq .accordion-item{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;}
.mk-faq .accordion-item:last-child{border-bottom:1px solid var(--line);}
.mk-faq .accordion-button{
  background:transparent;box-shadow:none;padding:22px 4px;font-size:17px;font-weight:600;
  color:var(--ink);border-radius:0;
}
.mk-faq .accordion-button:not(.collapsed){color:var(--signal);background:transparent;box-shadow:none;}
.mk-faq .accordion-button::after{
  background-image:none;content:"+";font-family:var(--font-num);font-size:22px;
  color:var(--text-3);width:auto;height:auto;line-height:1;transform:none;
  display:flex;align-items:center;justify-content:center;
}
.mk-faq .accordion-button:not(.collapsed)::after{content:"−";color:var(--signal);transform:none;}
.mk-faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--signal);outline-offset:-2px;}
.mk-faq .accordion-body{padding:0 4px 26px;font-size:15px;color:var(--text-2);line-height:1.85;max-width:820px;}

/* ---------- 深色 CTA ---------- */
.cta-dark{
  background:var(--ink);color:#fff;padding:88px 0;border-radius:0;
}
.cta-dark h2{color:#fff;font-size:clamp(24px,3vw,36px);margin-bottom:var(--sp-4);}
.cta-dark p{color:rgba(255,255,255,.7);font-size:15px;max-width:620px;margin-bottom:var(--sp-6);}
.cta-buttons{display:flex;flex-wrap:wrap;gap:var(--sp-3);}
.btn-primary-lg{
  display:inline-flex;align-items:center;gap:10px;height:56px;padding:0 26px;
  background:var(--signal);color:#fff;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;border:1.5px solid var(--signal);transition:all .2s ease;
}
.btn-primary-lg:hover{background:var(--signal-hover);border-color:var(--signal-hover);color:#fff;transform:translateY(-1px);}
.btn-primary-lg i{transition:transform .2s ease;}
.btn-primary-lg:hover i{transform:translateX(4px);}
.btn-ghost-lg{
  display:inline-flex;align-items:center;gap:10px;height:56px;padding:0 24px;
  background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.42);
  border-radius:var(--r-btn);font-size:15px;font-weight:600;transition:all .2s ease;
}
.btn-ghost-lg:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff;transform:translateY(-1px);}
.cta-foot{
  margin-top:var(--sp-6);padding-top:var(--sp-5);border-top:1px solid rgba(255,255,255,.14);
  font-family:var(--font-num);font-size:12px;color:rgba(255,255,255,.6);letter-spacing:.02em;
  word-break:break-all;
}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:var(--sp-7);}
.footer-brand .brand{margin-bottom:var(--sp-4);}
.footer-brand .brand-mark{background:#fff;color:var(--ink);}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:rgba(255,255,255,.5);}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-social{display:flex;gap:var(--sp-3);margin-top:var(--sp-5);}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.75);
  transition:all .2s ease;
}
.footer-social a:hover{background:var(--signal);border-color:var(--signal);color:#fff;}
.footer-col h4{
  font-size:13px;letter-spacing:.12em;color:rgba(255,255,255,.5);
  font-weight:500;margin-bottom:var(--sp-4);
}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.75);
  margin-bottom:12px;transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:var(--signal);transform:translateX(2px);}
.footer-bottom{
  margin-top:var(--sp-8);padding-top:var(--sp-5);border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:var(--sp-3);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .45s cubic-bezier(.22,.61,.36,1),transform .45s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .header-center{max-width:440px;}
  .header-sub-link{display:none;}
}
@media (max-width:991px){
  .container-x{padding:0 24px;}
  .section{padding:72px 0;}
  .site-header .header-center{display:none;}
  .site-header .header-right .btn-ghost-sm{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-main{height:72px;}
  .cat-hero{padding:40px 0 48px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:var(--sp-6);}
  .hero-figure{max-width:560px;}
  .stream-layout{grid-template-columns:1fr;gap:var(--sp-6);}
  .filter-panel{position:static;}
  .flow-grid{grid-template-columns:repeat(2,1fr);}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-6);}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .header-center{max-width:100%;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-strip .stat{border-right:0;border-bottom:1px solid var(--line);padding:var(--sp-5);}
  .stat-strip .stat:last-child{border-bottom:0;}
  .stream-item{grid-template-columns:1fr;}
  .stream-thumb img{width:100%;height:180px;}
  .spec-row{grid-template-columns:1fr;gap:var(--sp-3);}
  .flow-grid{grid-template-columns:1fr;}
  .cta-buttons .btn-primary-lg,.cta-buttons .btn-ghost-lg{width:100%;justify-content:center;}
}
@media (max-width:519px){
  .container-x{padding:0 20px;}
  .brand-text span{display:none;}
  .cat-hero h1{font-size:30px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}