/* roulang page: index */
:root{
  --brand:#FF6A1F;
  --brand-dark:#E85A12;
  --brand-soft:#FFF1E8;
  --teal:#1FC8A9;
  --teal-soft:#E6FAF6;
  --amber:#FFC53D;
  --ink:#14161C;
  --ink-2:#1B1E24;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --line:#E7E9EE;
  --text:#1B1E24;
  --muted:#5C6470;
  --faint:#9AA1AC;
  --danger:#E5484D;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-dl:20px;
  --radius-chip:999px;
  --shadow:0 1px 2px rgba(20,22,28,.06), 0 8px 24px -12px rgba(20,22,28,.18);
  --shadow-hover:0 12px 32px -12px rgba(20,22,28,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:-apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono:"DIN Alternate", ui-monospace, "Roboto Mono", "SFMono-Regular", Menlo, monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--text);}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-title{font-size:32px;font-weight:700;line-height:1.35;}
.section-desc{margin-top:10px;font-size:15px;color:var(--muted);max-width:680px;}
.more-link{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;}
.more-link i{margin-left:6px;font-size:12px;transition:transform .22s var(--ease);}
.more-link:hover i{transform:translateX(4px);}

/* ============ 顶部公告条 ============ */
.topbar{height:36px;background:var(--ink);color:#C9CDD6;}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-text{
  font-size:12px;line-height:36px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-text i{color:var(--brand);margin-right:8px;}
.topbar-close{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;color:#9AA1AC;font-size:16px;line-height:1;
  display:flex;align-items:center;justify-content:center;transition:background .18s var(--ease),color .18s var(--ease);
}
.topbar-close:hover{background:rgba(255,255,255,.1);color:#fff;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:120;background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{height:68px;display:flex;align-items:center;gap:28px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:3px 3px 0 rgba(255,106,31,.28);
}
.brand-text{font-size:17px;font-weight:700;color:#fff;letter-spacing:.01em;}
.nav-chips{
  flex:1 1 auto;display:flex;align-items:center;gap:4px;overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 14px),transparent 100%);
  mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 14px),transparent 100%);
}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chip{
  flex:0 0 auto;padding:9px 14px 10px;font-size:13px;font-weight:500;letter-spacing:.02em;
  color:#AEB4BF;border-bottom:2px solid transparent;border-radius:8px 8px 0 0;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.nav-chip:hover{color:#fff;background:rgba(255,106,31,.14);}
.nav-chip.is-active{color:var(--brand);background:rgba(255,106,31,.14);border-bottom-color:var(--brand);}
.header-actions{flex:0 0 auto;display:flex;align-items:center;gap:18px;margin-left:24px;}
.header-link{font-size:13px;color:#AEB4BF;}
.header-link:hover{color:#fff;}
.burger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  color:#fff;font-size:15px;align-items:center;justify-content:center;
}
.burger:hover{background:rgba(255,255,255,.08);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;font-size:15px;font-weight:600;border-radius:var(--radius-btn);
  border:2px solid var(--ink);transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:3px 3px 0 rgba(20,22,28,.9);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translate(-1px,-1px);box-shadow:4px 4px 0 rgba(20,22,28,.9);}
.btn-primary:active{transform:translate(1px,1px);box-shadow:1px 1px 0 rgba(20,22,28,.9);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);box-shadow:none;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-outline-dark{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;box-shadow:none;}
.btn-outline-dark:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{height:38px;padding:0 18px;font-size:13px;}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}
.btn[disabled]{background:#E7E9EE;border-color:#E7E9EE;color:var(--faint);box-shadow:none;cursor:not-allowed;transform:none;}

/* ============ Hero ============ */
.hero{
  position:relative;background:#101218;color:#fff;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(16,18,24,.94) 0%,rgba(16,18,24,.86) 46%,rgba(16,18,24,.72) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:radial-gradient(#fff 1px,transparent 1px);background-size:22px 22px;
}
.hero-inner{
  position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:88px 0 96px;
}
.hero-copy{max-width:560px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-chip);
  background:rgba(31,200,169,.16);color:#6FE6CE;font-size:12px;font-weight:500;letter-spacing:.04em;margin-bottom:22px;
}
.hero-title{font-size:44px;line-height:1.25;font-weight:700;color:#fff;letter-spacing:-.01em;}
.hero-title em{font-style:normal;color:var(--brand);}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.7;color:#C6CBD5;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-meta{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:12px;color:#98A0AD;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;}
.hero-meta i{color:var(--teal);font-size:11px;}

/* ============ 下载卡 ============ */
.dl-card{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-dl);
  padding:26px;color:var(--text);box-shadow:0 20px 48px -20px rgba(0,0,0,.55);
}
.dl-badge{
  position:absolute;top:-11px;right:22px;background:var(--brand);color:#fff;font-size:11px;font-weight:600;
  padding:4px 12px;border-radius:var(--radius-chip);letter-spacing:.03em;
}
.dl-tabs{display:flex;gap:8px;margin-bottom:22px;}
.dl-tab{
  flex:1;height:38px;border-radius:var(--radius-chip);border:1px solid var(--line);background:#fff;
  font-size:13px;font-weight:500;color:var(--muted);transition:all .18s var(--ease);
}
.dl-tab:hover{border-color:var(--brand);color:var(--brand);}
.dl-tab.is-active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-dark);font-weight:600;}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px;padding-bottom:22px;border-bottom:1px dashed var(--line);}
.dl-field{min-width:0;}
.dl-label{display:block;font-size:12px;color:var(--faint);letter-spacing:.02em;}
.dl-value{display:block;margin-top:4px;font-size:14px;font-weight:600;color:var(--ink-2);font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.dl-bottom{display:flex;align-items:center;gap:18px;padding-top:22px;}
.dl-bottom .btn{flex:1 1 auto;}
.qr-box{
  flex:0 0 auto;width:96px;height:96px;border:1px dashed var(--line);border-radius:var(--radius-img);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:var(--faint);font-size:11px;text-align:center;
}
.qr-box i{font-size:22px;color:var(--line);}
.dl-note{margin-top:14px;font-size:12px;color:var(--faint);line-height:1.7;}

/* ============ 价值条目 ============ */
.value-list{
  display:grid;grid-template-columns:1fr 1fr;gap:0 56px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:8px 40px;box-shadow:var(--shadow);
}
.value-item{display:flex;gap:22px;padding:30px 0;border-bottom:1px solid var(--line);}
.value-item:last-child{border-bottom:0;}
.value-item:nth-last-child(2){border-bottom:0;}
.value-num{
  flex:0 0 auto;width:48px;height:48px;border-radius:50%;border:2px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:16px;font-weight:700;
  background:var(--brand-soft);
}
.value-body h3{font-size:18px;font-weight:600;line-height:1.5;}
.value-body p{margin:8px 0 0;font-size:14px;line-height:1.8;color:var(--muted);}

/* ============ 截图轮播 ============ */
.shots-wrap{background:var(--ink);color:#fff;}
.shots-wrap .section-title{color:#fff;}
.shots-wrap .section-desc{color:#A5ABB6;}
.orbit{margin:0;}
.orbit-container{border-radius:var(--radius-card);overflow:hidden;border:1px solid rgba(255,255,255,.12);}
.orbit-slide{background:var(--ink-2);}
.orbit-image{width:100%;aspect-ratio:16/9;object-fit:cover;}
.orbit-caption{
  position:static;background:rgba(20,22,28,.88);padding:14px 20px;font-size:13px;color:#C6CBD5;line-height:1.7;
}
.orbit-controls button.orbit-previous,.orbit-controls button.orbit-next{
  background:rgba(20,22,28,.86);color:#fff;border:1px solid rgba(255,255,255,.16);border-radius:50%;
  width:42px;height:42px;display:flex;align-items:center;justify-content:center;top:auto;bottom:70px;
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.orbit-controls button.orbit-previous:hover,.orbit-controls button.orbit-next:hover{background:var(--brand);transform:translateY(-2px);}
.orbit-controls button.orbit-previous{left:16px;}
.orbit-controls button.orbit-next{right:16px;}
.orbit-bullets{margin-top:22px;text-align:center;display:flex;justify-content:center;gap:10px;}
.orbit-bullets button{
  width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.3);margin:0;padding:0;float:none;
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.orbit-bullets button:hover{background:rgba(255,255,255,.6);}
.orbit-bullets button.is-active{background:var(--brand);transform:scale(1.4);}

/* ============ 系统要求 ============ */
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.req-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;
  box-shadow:var(--shadow);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.req-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D9DDE5;}
.req-platform{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line);}
.req-platform i{
  width:38px;height:38px;border-radius:10px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:17px;
}
.req-platform h3{font-size:17px;font-weight:600;}
.req-dl{margin:20px 0 0;}
.req-tier{margin-bottom:20px;}
.req-tier:last-child{margin-bottom:0;}
.req-tier-name{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--ink);
  padding-left:10px;border-left:3px solid var(--faint);
}
.req-tier.is-rec .req-tier-name{border-left-color:var(--teal);color:#12907A;}
.req-tier dl{margin:12px 0 0;}
.req-row{display:flex;justify-content:space-between;gap:12px;padding:7px 0;font-size:13.5px;}
.req-row dt{color:var(--muted);}
.req-row dd{margin:0;font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--ink-2);font-weight:600;}

/* ============ 资讯列表 ============ */
.news-grid{margin-top:0;}
.news-card{
  display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  margin-bottom:24px;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D9DDE5;color:inherit;}
.news-cover{aspect-ratio:16/10;overflow:hidden;background:var(--bg);}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-chip{
  align-self:flex-start;display:inline-block;padding:3px 11px;border-radius:var(--radius-chip);
  background:var(--teal-soft);color:#12907A;font-size:12px;font-weight:500;letter-spacing:.02em;margin-bottom:12px;
}
.news-title{
  font-size:17px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  margin:10px 0 16px;font-size:13.5px;line-height:1.8;color:var(--muted);flex:1 1 auto;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-time{
  display:flex;align-items:center;gap:8px;font-size:12px;color:var(--faint);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;padding-top:14px;border-top:1px solid var(--line);
}
.news-time i{font-size:11px;}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:48px 32px;text-align:center;
}
.empty-state i{font-size:48px;color:var(--faint);display:block;margin-bottom:18px;}
.empty-state p{margin:0 0 8px;font-size:15px;color:var(--ink);}
.empty-state span{display:block;font-size:13px;color:var(--faint);margin-bottom:22px;}
.empty-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.chip{
  display:inline-block;padding:7px 16px;border-radius:var(--radius-chip);border:1px solid var(--line);
  background:#fff;font-size:13px;color:var(--muted);transition:all .18s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}

/* ============ 评价墙 ============ */
.review-track{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-img);padding:24px;
  display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex:0 0 auto;
}
.review-name{font-size:14px;font-weight:600;color:var(--ink);}
.review-date{font-size:12px;color:var(--faint);font-family:var(--font-mono);}
.stars{color:var(--amber);font-size:12px;letter-spacing:2px;margin-bottom:10px;}
.stars .off{color:#DFE2E8;}
.review-text{font-size:13.5px;line-height:1.85;color:var(--muted);flex:1 1 auto;margin:0;}
.review-foot{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--faint);
}

/* ============ 下载按钮组 ============ */
.dl-panel{
  background:#fff;border:2px solid var(--ink);border-radius:var(--radius-dl);padding:40px;
  box-shadow:8px 8px 0 rgba(20,22,28,.08);
}
.dl-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.dl-buttons .btn{width:100%;}
.dl-checksum{
  margin-top:28px;padding-top:22px;border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;gap:8px 26px;font-size:12.5px;color:var(--muted);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
}
.dl-checksum i{color:var(--teal);margin-right:6px;}
.dl-disclaimer{margin:16px 0 0;font-size:12px;line-height:1.75;color:var(--faint);}

/* ============ FAQ ============ */
.faq-list{margin:0;background:transparent;}
.faq-list .accordion-item{border:1px solid var(--line);border-radius:var(--radius-img);background:#fff;margin-bottom:10px;overflow:hidden;}
.faq-list .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 24px;min-height:56px;font-size:16px;font-weight:600;color:var(--ink);border:0;
  transition:color .18s var(--ease);
}
.faq-list .accordion-title::before{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--brand);
  order:2;font-size:13px;transition:transform .2s var(--ease);
}
.faq-list .accordion-title[aria-expanded="true"]::before{content:"\f068";transform:rotate(180deg);}
.faq-list .accordion-title:hover{background:var(--brand-soft);color:var(--brand-dark);}
.faq-list .accordion-content{padding:0 24px 22px;border:0;font-size:15px;line-height:1.85;color:var(--muted);}
.faq-list .accordion-content p:last-child{margin-bottom:0;}

/* ============ CTA 条 ============ */
.cta-bar{
  position:relative;background:#101218;color:#fff;overflow:hidden;
  background-image:linear-gradient(100deg,rgba(16,18,24,.95) 0%,rgba(16,18,24,.82) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0;}
.cta-title{font-size:26px;font-weight:700;color:#fff;line-height:1.4;}
.cta-sub{margin:8px 0 0;font-size:14px;color:#A5ABB6;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#A5ABB6;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:13.5px;line-height:1.9;color:#8E95A1;max-width:320px;}
.footer-mark{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:6px 14px;border-radius:var(--radius-chip);
  background:rgba(255,106,31,.14);color:var(--brand);font-size:12px;font-weight:500;
}
.footer-col h4{font-size:14px;font-weight:600;color:#EDF0F4;margin-bottom:18px;}
.footer-links li{margin-bottom:11px;}
.footer-links a{font-size:13px;color:#8E95A1;}
.footer-links a:hover{color:var(--brand);}
.footer-form label{display:block;font-size:13px;color:#B6BCC7;margin-bottom:8px;}
.footer-form input,.footer-form textarea{
  width:100%;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-btn);padding:0 14px;height:44px;color:#fff;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.footer-form textarea{height:88px;padding:12px 14px;line-height:1.7;resize:vertical;}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:#6C737F;}
.footer-form input:focus,.footer-form textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,31,.22);
}
.footer-form .btn{margin-top:14px;width:100%;}
.form-hint{margin-top:10px;font-size:12px;color:#6C737F;}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:12px;color:#6C737F;
}
.footer-bottom a{color:#8E95A1;}
.footer-bottom a:hover{color:var(--brand);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;
  box-shadow:0 8px 24px -8px rgba(20,22,28,.6);z-index:200;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),background .18s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand);color:#fff;}

/* ============ 移动抽屉 ============ */
.drawer{
  position:fixed;inset:56px 0 0 0;background:var(--ink);z-index:110;padding:24px 20px;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer a{display:block;padding:14px 4px;font-size:15px;color:#C6CBD5;border-bottom:1px solid rgba(255,255,255,.07);}
.drawer a:hover,.drawer a.is-active{color:var(--brand);}

/* ============ 响应式 ============ */
@media screen and (max-width:1279px){
  .container{padding:0 40px;}
  .hero-title{font-size:40px;}
}
@media screen and (max-width:1023px){
  .container{padding:0 32px;}
  .section{padding:64px 0;}
  .nav-chips{display:none;}
  .header-link{display:none;}
  .burger{display:flex;}
  .header-inner{gap:16px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:56px 0 68px;}
  .hero-copy{max-width:none;}
  .hero-title{font-size:34px;}
  .value-list{grid-template-columns:1fr;padding:8px 28px;}
  .value-item:nth-last-child(2){border-bottom:1px solid var(--line);}
  .req-grid{grid-template-columns:1fr;gap:18px;}
  .review-track{grid-template-columns:repeat(2,1fr);gap:18px;}
  .dl-buttons{grid-template-columns:1fr;gap:14px;}
  .dl-panel{padding:32px;}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:22px;padding:48px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media screen and (max-width:639px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .section-title{font-size:22px;}
  .header-inner{height:56px;}
  .brand-text{font-size:15px;}
  .brand-mark{width:30px;height:30px;border-radius:9px;font-size:14px;}
  .header-actions .btn{height:38px;padding:0 14px;font-size:13px;}
  .hero-inner{padding:40px 0 52px;}
  .hero-title{font-size:28px;}
  .hero-sub{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 100%;}
  .dl-card{padding:20px;border-radius:16px;}
  .dl-grid{grid-template-columns:1fr 1fr;gap:14px;}
  .dl-bottom{flex-direction:column;align-items:stretch;}
  .qr-box{width:100%;height:80px;flex-direction:row;gap:10px;}
  .value-list{padding:4px 20px;}
  .value-item{gap:16px;padding:24px 0;}
  .value-num{width:40px;height:40px;font-size:14px;}
  .review-track{
    display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;
    scrollbar-width:none;
  }
  .review-track::-webkit-scrollbar{display:none;}
  .review-card{flex:0 0 82%;scroll-snap-align:start;}
  .dl-panel{padding:24px 20px;border-radius:16px;box-shadow:5px 5px 0 rgba(20,22,28,.08);}
  .faq-list .accordion-title{padding:0 18px;font-size:15px;min-height:52px;}
  .faq-list .accordion-content{padding:0 18px 18px;font-size:14px;}
  .cta-title{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .to-top{right:16px;bottom:16px;}
  .orbit-controls button.orbit-previous,.orbit-controls button.orbit-next{bottom:60px;width:36px;height:36px;}
}

/* roulang page: article */
:root{
  --brand:#FF6A1F;
  --brand-dark:#E85A12;
  --brand-light:#FFF1E8;
  --teal:#1FC8A9;
  --teal-light:#E6FAF6;
  --yellow:#FFC53D;
  --ink:#14161C;
  --text:#1B1E24;
  --muted:#5C6470;
  --line:#E7E9EE;
  --bg:#F5F6F8;
  --white:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-card:0 1px 2px rgba(20,22,28,.06), 0 8px 24px -12px rgba(20,22,28,.18);
  --shadow-hover:0 12px 32px -12px rgba(20,22,28,.28);
  --mono:"DIN Alternate", ui-monospace, "Roboto Mono", "SFMono-Regular", Menlo, monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
a:hover{color:var(--brand-dark)}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
input,textarea{font-family:inherit}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px}

/* ---------- 顶部公告条 ---------- */
.topbar{background:var(--ink);color:rgba(255,255,255,.78);font-size:12px;line-height:1.5;min-height:36px;display:flex;align-items:center}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.topbar-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-close{background:none;border:0;color:rgba(255,255,255,.62);font-size:13px;padding:4px 6px;border-radius:6px;transition:color .18s var(--ease),background-color .18s var(--ease)}
.topbar-close:hover{color:#fff;background:rgba(255,255,255,.1)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(180%) blur(8px)}
.header-inner{display:flex;align-items:center;height:68px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(150deg,var(--brand),#FF9A4D);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:15px;box-shadow:0 6px 16px -8px rgba(255,106,31,.85)}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand:hover .brand-text{color:var(--brand)}
.nav-chips{display:flex;align-items:center;gap:6px;margin:0 auto}
.nav-chip{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--muted);border:1px solid transparent;white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease)
}
.nav-chip:hover{background:var(--brand-light);color:var(--brand-dark)}
.nav-chip.is-active{background:var(--brand-light);color:var(--brand);box-shadow:inset 0 -2px 0 var(--brand)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto}
.header-link{font-size:14px;color:var(--muted)}
.header-link:hover{color:var(--brand)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:15px}
.burger:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .22s var(--ease)
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand-light);color:var(--brand-dark)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- 文章头 ---------- */
.article-hero{
  position:relative;color:#fff;padding:42px 0 46px;overflow:hidden;
  background:linear-gradient(180deg,rgba(20,22,28,.92),rgba(20,22,28,.82)),url('/assets/images/backpic/back-2.png') center/cover no-repeat
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px
}
.article-hero .container{position:relative;z-index:2}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.82)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:rgba(255,255,255,.38)}
.crumb .current{max-width:460px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:rgba(255,255,255,.58)}
.article-title{
  font-size:clamp(28px,3.4vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em;
  color:#fff;max-width:900px
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px 18px;margin-top:22px;font-size:13px;color:rgba(255,255,255,.72)}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.02em;color:#8FEBD9;
  background:rgba(31,200,169,.16);border:1px solid rgba(31,200,169,.34)
}
.meta-item{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.meta-item i{color:rgba(255,255,255,.5);font-size:12px}
.meta-item .mono{color:#fff}

/* ---------- 正文布局 ---------- */
.article-section{padding:56px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:40px;align-items:start}
.article-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);padding:40px 40px 34px
}
.article-lead{
  font-size:16px;line-height:1.95;color:#3A3F47;background:var(--brand-light);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;padding:16px 20px;margin-bottom:28px
}
.article-body{max-width:760px;font-size:17px;line-height:1.95;color:#22262E;overflow-wrap:break-word}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;font-size:22px;font-weight:700;line-height:1.5;color:var(--ink);
  margin:2.2em 0 .8em;padding-left:14px
}
.article-body h2::before{content:"";position:absolute;left:0;top:.35em;bottom:.18em;width:4px;border-radius:2px;background:var(--brand)}
.article-body h3{font-size:18px;font-weight:600;line-height:1.5;color:var(--ink);margin:1.6em 0 .6em}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink);margin:1.4em 0 .5em}
.article-body ul{margin:0 0 1.25em;padding-left:2px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.5em}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--teal)}
.article-body ol{list-style:decimal;margin:0 0 1.25em;padding-left:26px}
.article-body ol li{margin-bottom:.5em}
.article-body ol li::marker{font-family:var(--mono);color:var(--brand);font-weight:600}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;background:var(--brand-light);border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:#3A3F47;font-size:16px;line-height:1.9
}
.article-body img{border-radius:var(--r-img);margin:1.4em auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:10px;line-height:1.7}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0}
.article-body th{background:var(--ink);color:#fff;font-weight:600;text-align:left;padding:12px 14px;font-size:14px}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);color:#33383F}
.article-body tr:nth-child(even) td{background:#FAFBFC}
.article-body a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--brand);text-decoration-thickness:2px}
.article-body strong{color:var(--ink);font-weight:600}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:2em 0}
.article-body code{font-family:var(--mono);font-size:14px;background:#F2F4F7;border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:#B34A0C}

/* 空态 */
.empty-state{
  text-align:center;padding:56px 24px;background:#FAFBFC;border:1px dashed var(--line);border-radius:14px
}
.empty-state i{font-size:44px;color:#9AA1AC;margin-bottom:16px;display:block}
.empty-state p{font-size:15px;color:var(--ink);font-weight:600;margin-bottom:8px}
.empty-state .empty-sub{font-size:13px;color:var(--muted);font-weight:400;line-height:1.8;max-width:460px;margin:0 auto 20px}

/* ---------- 文末 ---------- */
.article-footer{margin-top:36px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.tag-row .tag-label{font-size:13px;color:var(--muted);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.02em;color:#0E8C76;background:var(--teal-light);
  border:1px solid rgba(31,200,169,.28);transition:background-color .18s var(--ease),color .18s var(--ease)
}
.tag:hover{background:#D2F5EE;color:#0B7A66}
.tag.is-plain{background:#F2F4F7;color:var(--muted);border-color:var(--line)}
.tag.is-plain:hover{background:var(--brand-light);color:var(--brand-dark);border-color:rgba(255,106,31,.35)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px}
.post-nav a{
  display:block;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:14px;
  transition:border-color .18s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease)
}
.post-nav a:hover{border-color:var(--brand);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.post-nav .pn-label{font-size:12px;color:var(--muted);display:block}
.post-nav .pn-title{display:block;margin-top:6px;font-size:15px;font-weight:600;color:var(--ink);line-height:1.6}
.post-nav a:hover .pn-title{color:var(--brand)}
.post-nav .pn-right{text-align:right}

/* ---------- 侧栏 ---------- */
.side-stack{display:flex;flex-direction:column;gap:20px}
.side-card{
  position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-card)
}
.side-card::after{
  content:"";position:absolute;right:0;bottom:0;width:20px;height:20px;
  background:linear-gradient(135deg,transparent 50%,var(--brand-light) 50%)
}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--ink);margin-bottom:12px}
.side-title i{color:var(--brand);font-size:14px}
.side-list li+li{border-top:1px solid var(--line)}
.side-list a{display:block;padding:12px 0;font-size:14px;line-height:1.6;color:var(--text)}
.side-list a:hover{color:var(--brand)}
.side-time{display:block;margin-top:5px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.chip-group{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;height:30px;padding:0 13px;border-radius:999px;
  font-size:12.5px;color:var(--muted);background:#fff;border:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)
}
.chip:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-light)}
.dl-mini{background:var(--ink);border-color:var(--ink);color:#fff}
.dl-mini .side-title{color:#fff}
.dl-mini .side-title i{color:var(--brand)}
.dl-mini .dl-row{display:flex;justify-content:space-between;font-size:12.5px;padding:7px 0;color:rgba(255,255,255,.68);border-bottom:1px dashed rgba(255,255,255,.14)}
.dl-mini .dl-row span:last-child{font-family:var(--mono);color:#fff}
.dl-mini .btn{margin-top:16px;width:100%}
.dl-mini::after{background:linear-gradient(135deg,transparent 50%,rgba(255,106,31,.35) 50%)}

/* ---------- 相关推荐 ---------- */
.related-section{padding:0 0 8px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink);line-height:1.35}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px}
.section-more{font-size:14px;font-weight:600;color:var(--brand)}
.section-more:hover{color:var(--brand-dark)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .18s var(--ease)
}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:#DFE2E9}
.rel-thumb{aspect-ratio:16/10;background:#EDEFF3;overflow:hidden}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-cat{
  align-self:flex-start;font-size:12px;font-weight:500;letter-spacing:.02em;color:#0E8C76;
  background:var(--teal-light);border:1px solid rgba(31,200,169,.28);border-radius:999px;padding:4px 11px
}
.rel-title{
  font-size:16px;font-weight:600;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
}
.rel-card:hover .rel-title{color:var(--brand)}
.rel-ex{
  font-size:14px;line-height:1.7;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
}
.rel-time{margin-top:auto;font-family:var(--mono);font-size:12px;color:var(--muted)}

/* ---------- 尾部 CTA ---------- */
.cta-strip{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:52px 0;margin-top:72px}
.cta-strip::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-text h2{font-size:clamp(21px,2.3vw,26px);font-weight:700;color:#fff;line-height:1.4}
.cta-text p{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:560px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.cta-strip .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff}
.cta-strip .btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.cta-check{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:28px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.62)
}
.cta-note{position:relative;z-index:2;margin-top:12px;font-size:12px;color:rgba(255,255,255,.45);line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.62);max-width:340px}
.footer-mark{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;padding:6px 13px;border-radius:999px;
  border:1px solid rgba(255,255,255,.18);font-size:12px;color:rgba(255,255,255,.72);font-family:var(--mono)
}
.footer-mark i{color:var(--brand)}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links li a{display:block;font-size:13px;color:rgba(255,255,255,.66);padding:6px 0}
.footer-links li a:hover{color:var(--brand)}
.footer-form label{display:block;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:6px}
.footer-form input,.footer-form textarea{
  width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:10px;padding:12px 14px;color:#fff;font-size:14px;line-height:1.6;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease)
}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:rgba(255,255,255,.38)}
.footer-form input:focus,.footer-form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,31,.22)}
.footer-form textarea{min-height:92px;resize:vertical}
.footer-form .btn{margin-top:16px;width:100%}
.form-hint{font-size:12px;line-height:1.7;color:rgba(255,255,255,.55);margin-top:10px}
.form-hint.is-ok{color:#7FE3D0}
.form-hint.is-error{color:#FF9A9C}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px 20px;margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:rgba(255,255,255,.5);line-height:1.7
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;border:0;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;
  opacity:0;transform:translateY(12px);pointer-events:none;z-index:90;
  transition:opacity .22s var(--ease),transform .22s var(--ease),background-color .18s var(--ease)
}
.to-top.is-visible{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{background:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 32px}
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-grid .footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:1023px){
  .container{padding:0 32px}
  .header-inner{flex-wrap:wrap;height:auto;min-height:56px;padding:10px 0;gap:12px}
  .header-link{display:none}
  .burger{display:inline-flex}
  .nav-chips{
    display:none;order:4;width:100%;margin:6px 0 4px;overflow-x:auto;gap:8px;
    padding-bottom:6px;scrollbar-width:none;-ms-overflow-style:none;
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%)
  }
  .nav-chips.is-open{display:flex}
  .nav-chips::-webkit-scrollbar{display:none}
  .article-layout{grid-template-columns:1fr;gap:32px}
  .side-stack{flex-direction:column}
  .article-card{padding:28px 24px}
  .article-section{padding:40px 0 56px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid .footer-col:last-child{grid-column:1 / -1}
  .cta-strip{padding:44px 0;margin-top:56px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .topbar{font-size:11.5px}
  .header-inner{min-height:56px}
  .brand-text{font-size:16px}
  .btn{height:48px}
  .btn-sm{height:38px}
  .article-hero{padding:28px 0 32px}
  .article-title{font-size:28px}
  .crumb .current{max-width:200px}
  .article-card{padding:22px 18px;border-radius:14px}
  .article-body{font-size:16px;line-height:1.9}
  .article-body h2{font-size:19px}
  .article-body h3{font-size:17px}
  .post-nav{grid-template-columns:1fr}
  .post-nav .pn-right{text-align:left}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:16px;bottom:16px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}

/* roulang page: category1 */
:root{
  --brand:#FF6A1F;
  --brand-dark:#E85A12;
  --brand-soft:#FFF1E8;
  --teal:#1FC8A9;
  --teal-soft:#E6FAF6;
  --yellow:#FFC53D;
  --ink:#14161C;
  --ink-soft:#22262F;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --line:#E7E9EE;
  --text:#1B1E24;
  --muted:#5C6470;
  --dim:#9AA1AC;
  --danger:#E5484D;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-chip:999px;
  --sh-1:0 1px 2px rgba(20,22,28,.06), 0 8px 24px -12px rgba(20,22,28,.18);
  --sh-2:0 12px 32px -12px rgba(20,22,28,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:"DIN Alternate",ui-monospace,"Roboto Mono",monospace;
  --header-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand);text-decoration:none;background:transparent;transition:color .18s var(--ease);}
a:hover{color:var(--brand-dark);}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;cursor:pointer;}
input,textarea{font-family:inherit;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 48px;
}

/* ===== 顶部公告条 ===== */
.announce{
  height:36px;
  background:var(--ink);
  color:#B9C0CC;
  font-size:12px;
  letter-spacing:.01em;
  display:flex;
  align-items:center;
}
.announce .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.announce-text{
  display:flex;
  align-items:center;
  gap:8px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.announce-text i{color:var(--brand);}
.announce-close{
  background:transparent;
  border:0;
  color:#8A92A0;
  font-size:12px;
  line-height:1;
  padding:6px;
  border-radius:6px;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.announce-close:hover{color:#fff;background:rgba(255,255,255,.08);}

/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  min-height:var(--header-h);
  gap:0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text);
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:10px;
  background:var(--brand);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  box-shadow:0 6px 16px -8px rgba(255,106,31,.9);
}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:28px;
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chip{
  position:relative;
  flex:0 0 auto;
  padding:8px 14px 10px;
  border-radius:8px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.nav-chip:hover{
  color:var(--brand-dark);
  background:var(--brand-soft);
}
.nav-chip.is-active{
  color:var(--brand);
  background:var(--brand-soft);
  border-bottom-color:var(--brand);
  font-weight:600;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:24px;
  flex:0 0 auto;
}
.header-link{
  font-size:14px;
  color:var(--muted);
  white-space:nowrap;
}
.header-link:hover{color:var(--brand);}
.burger{
  display:none;
  width:40px;
  height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--text);
  align-items:center;
  justify-content:center;
  font-size:15px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.burger:hover{border-color:var(--brand);color:var(--brand);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 24px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .22s var(--ease);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:transparent;}
.btn-light{
  background:rgba(255,255,255,.10);
  color:#fff;
  border-color:rgba(255,255,255,.35);
}
.btn-light:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn:disabled{background:#EDEFF3;color:var(--dim);border-color:#EDEFF3;cursor:not-allowed;}

/* ===== 标签 ===== */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--r-chip);
  font-size:12px;
  font-weight:500;
  letter-spacing:.02em;
  line-height:1.6;
}
.chip-teal{background:var(--teal-soft);color:#0E8C76;}
.chip-brand{background:var(--brand-soft);color:var(--brand-dark);}
.chip-line{border:1px solid var(--line);color:var(--muted);background:#fff;}

/* ===== 分类页头 ===== */
.cat-head{
  position:relative;
  background-image:linear-gradient(115deg,rgba(20,22,28,.90) 0%,rgba(20,22,28,.76) 55%,rgba(20,22,28,.62) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
  padding:52px 0 48px;
}
.cat-head::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px;
  pointer-events:none;
}
.cat-head .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.66);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:rgba(255,255,255,.78);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{color:rgba(255,255,255,.36);}
.breadcrumb .current{color:rgba(255,255,255,.55);}
.cat-head h1{
  font-size:44px;
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.cat-head .lead{
  font-size:16px;
  line-height:1.85;
  color:rgba(255,255,255,.80);
  max-width:640px;
}
.cat-facts{
  margin-top:30px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.16);
  border-radius:14px;
  overflow:hidden;
}
.fact{
  background:rgba(20,22,28,.42);
  padding:14px 18px;
}
.fact dt{
  font-size:12px;
  color:rgba(255,255,255,.60);
  letter-spacing:.02em;
  margin-bottom:4px;
}
.fact dd{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  color:#fff;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* ===== 锚点条 ===== */
.anchor-bar{
  position:sticky;
  top:var(--header-h);
  z-index:90;
  background:rgba(245,246,248,.96);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:10px 0;
}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-link{
  flex:0 0 auto;
  font-size:13px;
  color:var(--muted);
  padding:6px 12px;
  border-radius:var(--r-chip);
  border:1px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.anchor-link:hover{color:var(--brand-dark);background:var(--brand-soft);}
.anchor-link.is-active{
  color:var(--brand-dark);
  background:#fff;
  border-color:var(--line);
  font-weight:600;
}

/* ===== 主体 ===== */
.page-main{padding:56px 0 72px;}
.reading{
  max-width:760px;
  margin:0 auto;
}
.reading > section + section{margin-top:56px;}

.section-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--brand-dark);
  background:var(--brand-soft);
  padding:4px 10px;
  border-radius:var(--r-chip);
  margin-bottom:14px;
}
.reading h2{
  font-size:32px;
  font-weight:700;
  line-height:1.35;
  padding-left:14px;
  border-left:4px solid var(--brand);
  margin-bottom:20px;
  letter-spacing:-.01em;
}
.reading h3{
  font-size:20px;
  font-weight:600;
  line-height:1.5;
  margin:32px 0 12px;
}
.reading p{
  font-size:17px;
  line-height:1.95;
  color:var(--text);
  margin-bottom:1.15em;
}
.reading p:last-child{margin-bottom:0;}
.reading strong{font-weight:600;color:var(--ink);}
.mono{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:.94em;
  color:var(--ink);
  padding:0 2px;
}

/* 有序要点 */
.num-list{counter-reset:num;margin:8px 0 4px;}
.num-item{
  counter-increment:num;
  position:relative;
  padding:18px 20px 18px 62px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  margin-bottom:12px;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.num-item:hover{box-shadow:var(--sh-1);transform:translateY(-1px);}
.num-item::before{
  content:counter(num,decimal-leading-zero);
  position:absolute;
  left:20px;
  top:18px;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:15px;
  font-weight:700;
  color:var(--brand);
  width:28px;
  height:28px;
  border-radius:50%;
  border:1.5px solid var(--brand);
  display:flex;
  align-items:center;
  justify-content:center;
  line-height:1;
}
.num-item h3{
  margin:0 0 6px;
  font-size:16px;
  font-weight:600;
}
.num-item p{
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
  margin:0;
}

/* 对照条目 */
.compare-list{border-top:1px solid var(--line);margin-top:8px;}
.compare-item{
  display:grid;
  grid-template-columns:150px 1fr;
  gap:20px;
  padding:20px 0;
  border-bottom:1px solid var(--line);
}
.compare-item .key{
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  display:flex;
  align-items:flex-start;
  gap:8px;
  line-height:1.7;
}
.compare-item .key::before{
  content:"";
  width:3px;
  height:16px;
  border-radius:2px;
  background:var(--teal);
  margin-top:5px;
  flex:0 0 auto;
}
.compare-item .val{
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.compare-item .val b{color:var(--text);font-weight:600;}

/* 要点框 */
.callout-card{
  background:#fff;
  border:1px solid var(--line);
  border-left:4px solid var(--brand);
  border-radius:12px;
  padding:20px 24px;
  margin:26px 0;
  box-shadow:var(--sh-1);
}
.callout-card h4{
  font-size:15px;
  font-weight:600;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--ink);
}
.callout-card h4 i{color:var(--brand);}
.callout-card ul li{
  position:relative;
  padding-left:18px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  margin-bottom:6px;
}
.callout-card ul li:last-child{margin-bottom:0;}
.callout-card ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:6px;
  height:6px;
  border-radius:1px;
  background:var(--brand);
  opacity:.75;
}

/* 提示条 */
.notice{
  display:flex;
  gap:12px;
  align-items:flex-start;
  background:var(--teal-soft);
  border:1px solid rgba(31,200,169,.28);
  border-radius:12px;
  padding:16px 20px;
  margin:26px 0;
}
.notice i{
  color:#0E8C76;
  font-size:16px;
  margin-top:4px;
}
.notice p{
  font-size:15px;
  line-height:1.85;
  color:#0F5F52;
  margin:0;
}
.notice.is-warn{
  background:var(--brand-soft);
  border-color:rgba(255,106,31,.28);
}
.notice.is-warn i{color:var(--brand-dark);}
.notice.is-warn p{color:#8A3B0C;}

/* 图文块 */
.figure-block{
  margin:26px 0;
}
.figure-frame{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
  aspect-ratio:16/10;
}
.figure-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.figure-frame:hover img{transform:scale(1.03);}
.figure-block figcaption{
  font-size:13px;
  color:var(--dim);
  text-align:center;
  margin-top:10px;
  line-height:1.7;
}

/* 三端路径 */
.path-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  align-items:center;
  margin:24px 0 34px;
}
.path-block .path-text h3{margin-top:0;}
.path-block .path-text p{font-size:16px;margin-bottom:.9em;}
.path-block .path-text ol{
  counter-reset:step;
  margin-top:6px;
}
.path-block .path-text ol li{
  counter-increment:step;
  position:relative;
  padding-left:30px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  margin-bottom:8px;
}
.path-block .path-text ol li::before{
  content:counter(step);
  position:absolute;
  left:0;
  top:4px;
  width:18px;
  height:18px;
  border-radius:50%;
  background:var(--brand-soft);
  color:var(--brand-dark);
  font-family:var(--mono);
  font-size:11px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  line-height:1;
}
.path-block.reverse .path-media{order:2;}
.path-media{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
  aspect-ratio:4/3;
}
.path-media img{width:100%;height:100%;object-fit:cover;}

/* 结尾 CTA */
.tail-cta{
  margin-top:64px;
  background:var(--ink);
  border-radius:20px;
  padding:32px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  position:relative;
  overflow:hidden;
}
.tail-cta::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:16px 16px;
  pointer-events:none;
}
.tail-cta .cta-text{position:relative;z-index:1;}
.tail-cta .cta-text h3{
  font-size:22px;
  font-weight:700;
  color:#fff;
  margin:0 0 8px;
  line-height:1.5;
}
.tail-cta .cta-text p{
  font-size:14px;
  color:rgba(255,255,255,.66);
  margin:0;
  line-height:1.8;
}
.tail-cta .cta-actions{
  position:relative;
  z-index:1;
  display:flex;
  gap:12px;
  flex:0 0 auto;
}

/* 相关分类 */
.related{
  margin-top:48px;
  padding-top:32px;
  border-top:1px solid var(--line);
}
.related h3{
  font-size:16px;
  font-weight:600;
  margin:0 0 14px;
}
.related-chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.related-chips a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border-radius:var(--r-chip);
  border:1px solid var(--line);
  background:#fff;
  font-size:14px;
  color:var(--text);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .22s var(--ease);
}
.related-chips a:hover{
  border-color:var(--brand);
  color:var(--brand-dark);
  transform:translateY(-1px);
}
.back-home{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:24px;
  font-size:14px;
  color:var(--muted);
}
.back-home:hover{color:var(--brand);}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink);
  color:#B9C0CC;
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand p{
  font-size:13px;
  line-height:1.9;
  color:#8E96A4;
  margin-bottom:16px;
}
.footer-mark{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  color:#8E96A4;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-chip);
  padding:5px 12px;
}
.footer-mark i{color:var(--teal);}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#E9ECF1;
  margin-bottom:16px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  font-size:13px;
  color:#8E96A4;
  transition:color .18s var(--ease);
}
.footer-links a:hover{color:var(--brand);}
.footer-form label{
  display:block;
  font-size:13px;
  color:#8E96A4;
  margin-bottom:6px;
}
.footer-form input,
.footer-form textarea{
  width:100%;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-btn);
  color:#E9ECF1;
  font-size:14px;
  padding:0 14px;
  height:44px;
  line-height:44px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.footer-form textarea{
  height:88px;
  line-height:1.7;
  padding:12px 14px;
  resize:vertical;
}
.footer-form input::placeholder,
.footer-form textarea::placeholder{color:#6C7482;}
.footer-form input:focus,
.footer-form textarea:focus{
  outline:none;
  border-color:var(--brand);
  background:rgba(255,255,255,.08);
  box-shadow:0 0 0 3px rgba(255,106,31,.22);
}
.footer-form .btn{width:auto;margin-top:14px;}
.form-hint{
  font-size:12px;
  color:#6C7482;
  line-height:1.7;
  margin-top:10px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12px;
  color:#767E8C;
}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:0;
  background:var(--ink);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .22s var(--ease),transform .22s var(--ease),background .18s var(--ease);
  z-index:120;
}
.to-top.is-show{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{background:var(--brand);}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  :root{--header-h:56px;}
  .container{padding:0 32px;}
  .header-inner{flex-wrap:wrap;padding:8px 0;row-gap:8px;}
  .brand-mark{width:32px;height:32px;border-radius:9px;font-size:14px;}
  .brand-text{font-size:16px;}
  .header-actions{margin-left:auto;gap:12px;}
  .header-link{display:none;}
  .burger{display:inline-flex;}
  .nav-chips{
    order:3;
    width:100%;
    margin-left:0;
    padding-bottom:4px;
  }
  .nav-chips.is-open{
    flex-wrap:wrap;
    overflow:visible;
  }
  .cat-head{padding:40px 0 36px;}
  .cat-head h1{font-size:32px;}
  .cat-facts{grid-template-columns:repeat(2,minmax(0,1fr));}
  .anchor-bar{top:104px;}
  .page-main{padding:44px 0 60px;}
  .reading h2{font-size:26px;}
  .path-block{grid-template-columns:1fr;gap:18px;}
  .path-block.reverse .path-media{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .tail-cta{flex-direction:column;align-items:flex-start;padding:28px;}
}

@media (max-width:767px){
  .container{padding:0 20px;}
  .cat-head{padding:32px 0 28px;}
  .cat-head h1{font-size:28px;}
  .cat-head .lead{font-size:15px;}
  .cat-facts{grid-template-columns:1fr;}
  .anchor-bar{top:100px;}
  .page-main{padding:36px 0 48px;}
  .reading h2{font-size:22px;margin-bottom:16px;}
  .reading h3{font-size:18px;}
  .reading p{font-size:16px;line-height:1.9;}
  .num-item{padding:16px 16px 16px 56px;}
  .num-item::before{left:16px;top:16px;}
  .compare-item{grid-template-columns:1fr;gap:8px;}
  .compare-item .key{margin-bottom:2px;}
  .tail-cta{padding:24px 20px;border-radius:16px;}
  .tail-cta .cta-actions{flex-direction:column;width:100%;}
  .tail-cta .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .announce .container{padding:0 20px;}
  .announce-text{font-size:11px;}
}

@media (max-width:520px){
  .btn{padding:0 18px;font-size:14px;}
  .btn-sm{height:36px;padding:0 14px;font-size:13px;}
  .brand-text{font-size:15px;}
  .nav-chip{padding:7px 11px 9px;font-size:13px;}
  .reading h2{font-size:20px;padding-left:12px;border-left-width:3px;}
  .callout-card{padding:16px 18px;}
  .notice{padding:14px 16px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category2 */
:root{
  --brand:#FF6A1F;
  --brand-hover:#E85A12;
  --brand-soft:#FFF1E8;
  --teal:#1FC8A9;
  --teal-deep:#0E8F79;
  --teal-soft:#E6FAF6;
  --yellow:#FFC53D;
  --ink:#14161C;
  --ink-2:#1D2027;
  --bg:#F5F6F8;
  --paper:#FBF7F1;
  --card:#FFFFFF;
  --line:#E7E9EE;
  --text:#1B1E24;
  --muted:#5C6470;
  --disabled:#9AA1AC;
  --danger:#E5484D;
  --r-card:16px;
  --r-big:20px;
  --r-btn:10px;
  --r-img:12px;
  --r-chip:999px;
  --shadow-card:0 1px 2px rgba(20,22,28,.06),0 8px 24px -12px rgba(20,22,28,.18);
  --shadow-hover:0 12px 32px -12px rgba(20,22,28,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"DIN Alternate",ui-monospace,SFMono-Regular,"Roboto Mono",Menlo,monospace;
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--font);
  font-size:16px;line-height:1.85;
  color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ============ 顶部公告条 ============ */
.topbar{
  height:36px;background:var(--ink);color:#C9CED8;
  font-size:12px;display:flex;align-items:center;
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;white-space:nowrap;overflow:hidden;}
.topbar strong{color:var(--yellow);font-weight:600;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-size:15px;flex:0 0 34px;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--ink);line-height:1.2;}
.nav-chips{
  display:flex;align-items:center;gap:4px;flex:1 1 auto;
  overflow-x:auto;scrollbar-width:none;padding:4px 0;
}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chip{
  display:inline-block;padding:8px 14px;border-radius:var(--r-chip);
  font-size:13.5px;color:var(--muted);white-space:nowrap;
  border:1px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-chip:hover{background:var(--brand-soft);color:var(--brand-hover);}
.nav-chip.is-active{
  background:var(--brand-soft);color:var(--brand);font-weight:600;
  box-shadow:inset 0 -2px 0 var(--brand);
}
.header-actions{display:flex;align-items:center;gap:16px;margin-left:24px;flex:0 0 auto;}
.header-link{font-size:13.5px;color:var(--muted);transition:color .18s var(--ease);}
.header-link:hover{color:var(--brand);}
.burger{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);color:var(--ink);
  place-items:center;font-size:16px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-ghost-light{background:transparent;border:1px solid rgba(255,255,255,.28);color:#fff;}
.btn-ghost-light:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-lg{height:48px;padding:0 28px;font-size:16px;}
.btn[disabled],.btn.is-disabled{background:var(--line);color:var(--disabled);pointer-events:none;}

/* ============ 通用元素 ============ */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-chip);
  font-size:12px;font-weight:500;letter-spacing:.02em;
  background:var(--teal-soft);color:var(--teal-deep);
}
.chip-warn{background:var(--brand-soft);color:var(--brand-hover);}
.section{padding:80px 0;}
.section-sm{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section-head h2{font-size:32px;font-weight:700;line-height:1.35;color:var(--ink);}
.section-head p{font-size:14.5px;color:var(--muted);margin-top:10px;max-width:640px;}
.section-link{font-size:14px;color:var(--brand);font-weight:600;white-space:nowrap;}
.section-link:hover{color:var(--brand-hover);}
.divider{height:1px;background:var(--line);}

/* ============ 分类页头 ============ */
.page-hero{
  position:relative;color:#fff;padding:48px 0 56px;
  background-image:linear-gradient(rgba(20,22,28,.88),rgba(20,22,28,.94)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.10;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{font-size:13px;color:#9AA1AC;display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.crumbs a{color:#C9CED8;transition:color .18s var(--ease);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#5C6470;}
.crumbs .current{color:#fff;}
.page-hero-grid{
  display:grid;grid-template-columns:1.35fr .95fr;gap:48px;
  align-items:end;margin-top:22px;
}
.page-hero h1{font-size:44px;font-weight:700;line-height:1.25;letter-spacing:-.01em;margin-top:14px;}
.page-hero .lede{
  font-size:16px;line-height:1.85;color:#B9BFC9;margin-top:16px;max-width:640px;
}
.stat-strip{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-card);overflow:hidden;
}
.stat{background:rgba(20,22,28,.62);padding:16px 18px;}
.stat .k{font-size:12px;color:#9AA1AC;letter-spacing:.02em;}
.stat .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:15px;color:#fff;margin-top:4px;}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:68px;z-index:70;
  background:rgba(245,246,248,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.anchor-inner{display:flex;gap:8px;overflow-x:auto;padding:12px 0;scrollbar-width:none;}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-chip{
  font-size:13px;padding:6px 13px;border-radius:var(--r-chip);
  border:1px solid var(--line);background:#fff;color:var(--muted);
  white-space:nowrap;transition:all .18s var(--ease);
}
.anchor-chip:hover{border-color:var(--brand);color:var(--brand);}
.anchor-chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ============ 强调卡 ============ */
.spotlight{
  position:relative;
  background:var(--ink);color:#fff;border-radius:var(--r-big);
  padding:34px 40px;
  display:grid;grid-template-columns:1fr auto auto;gap:36px;align-items:center;
  box-shadow:8px 8px 0 rgba(255,106,31,.28);
  overflow:hidden;
}
.spotlight::after{
  content:"";position:absolute;right:-1px;bottom:-1px;
  width:64px;height:64px;background:var(--brand);
  clip-path:polygon(100% 0,100% 100%,0 100%);
  opacity:.9;
}
.spotlight .label{font-size:12px;color:var(--yellow);letter-spacing:.08em;font-weight:600;}
.spotlight h2{font-size:26px;font-weight:700;line-height:1.4;margin-top:10px;}
.spotlight p{font-size:14px;color:#A9AFBA;margin-top:10px;max-width:520px;}
.spotlight-meta{display:flex;gap:28px;flex-wrap:wrap;}
.spotlight-meta .item .k{font-size:12px;color:#8B929E;}
.spotlight-meta .item .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:16px;color:#fff;margin-top:4px;}

/* ============ 卡片网格 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  display:flex;flex-direction:column;overflow:hidden;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:#D8DCE4;}
.card-media{position:relative;aspect-ratio:16/10;background:#EDEFF3;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-media .media-chip{position:absolute;left:12px;top:12px;background:rgba(20,22,28,.82);color:#fff;}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.card-body h3{font-size:19px;font-weight:600;line-height:1.5;color:var(--ink);}
.card-body p{font-size:14.5px;line-height:1.8;color:var(--muted);}
.card-link{
  margin-top:auto;font-size:14px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.card-link i{font-size:12px;transition:transform .2s var(--ease);}
.card:hover .card-link i{transform:translateX(3px);}
.card-retro{border:1px solid #DCE0E8;box-shadow:5px 5px 0 rgba(20,22,28,.06);}
.card-retro:hover{box-shadow:6px 6px 0 rgba(255,106,31,.22);}

/* 规格列表 */
.spec-list{display:grid;grid-template-columns:auto 1fr;gap:7px 16px;margin:2px 0 4px;}
.spec-list dt{font-size:12.5px;color:var(--muted);}
.spec-list dd{
  margin:0;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:13.5px;color:var(--text);
}

/* 图标卡片（无图） */
.icon-card .icon-box{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:19px;margin-bottom:4px;
}
.icon-card.alt .icon-box{background:var(--teal-soft);color:var(--teal-deep);}

/* ============ 步骤条 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;position:relative;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.step:hover{border-color:var(--brand);transform:translateY(-3px);}
.step-num{
  width:36px;height:36px;border-radius:50%;
  border:1.5px solid var(--brand);color:var(--brand);
  display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:15px;
  background:var(--brand-soft);
}
.step h3{font-size:17px;font-weight:600;margin-top:16px;color:var(--ink);}
.step p{font-size:14px;color:var(--muted);margin-top:10px;line-height:1.8;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:10px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item:hover{border-color:#D8DCE4;}
.faq-item.is-open{border-color:var(--brand);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:14px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-item.is-open .faq-a{max-height:460px;}
.faq-a-inner{padding:0 22px 22px;font-size:14.5px;line-height:1.85;color:var(--muted);}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--r-big);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;
  background:radial-gradient(circle,rgba(255,106,31,.35),transparent 68%);
}
.cta-band .cta-text{position:relative;z-index:2;}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.4;}
.cta-band p{font-size:14px;color:#A9AFBA;margin-top:8px;}
.cta-band .btn{position:relative;z-index:2;}
.link-chips{display:flex;flex-wrap:wrap;gap:10px;}
.link-chips a{
  font-size:13px;padding:7px 14px;border-radius:var(--r-chip);
  border:1px solid var(--line);background:#fff;color:var(--muted);
  transition:all .18s var(--ease);
}
.link-chips a:hover{border-color:var(--brand);color:var(--brand);}
.back-home{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);
  transition:color .18s var(--ease);
}
.back-home:hover{color:var(--brand);}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#A9AFBA;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;
  padding:64px 0 40px;
}
.site-footer .brand-text{color:#fff;}
.site-footer .brand-mark{background:var(--brand);}
.footer-brand p{font-size:13.5px;line-height:1.9;color:#A9AFBA;margin-top:16px;max-width:360px;}
.footer-mark{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-size:12px;color:#8B929E;font-family:var(--mono);
}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:13px;color:#A9AFBA;transition:color .18s var(--ease);}
.footer-links a:hover{color:var(--brand);}
.footer-form label{display:block;font-size:13px;color:#A9AFBA;margin-bottom:6px;}
.footer-form input,.footer-form textarea{
  width:100%;background:var(--ink-2);border:1px solid #2A2E37;color:#fff;
  border-radius:var(--r-btn);padding:10px 12px;font-size:14px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.footer-form input{height:44px;}
.footer-form textarea{min-height:88px;resize:vertical;}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:#6B7280;}
.footer-form input:focus,.footer-form textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,31,.2);
}
.footer-form .btn{width:100%;margin-top:12px;}
.form-hint{font-size:12px;color:#8B929E;margin-top:10px;line-height:1.7;}
.form-hint.is-ok{color:var(--teal);}
.form-hint.is-err{color:var(--danger);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:18px 0 28px;display:flex;justify-content:space-between;gap:16px;
  font-size:12px;color:#8B929E;flex-wrap:wrap;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  font-size:15px;z-index:90;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease),background .18s var(--ease);
}
.to-top.is-show{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{background:var(--brand);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .container{padding:0 32px;}
  .section{padding:64px 0;}
  .section-head h2{font-size:26px;}
  .page-hero h1{font-size:34px;}
  .page-hero-grid{grid-template-columns:1fr;gap:32px;align-items:start;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
  .spotlight{grid-template-columns:1fr;gap:22px;padding:28px 26px;}
  .anchor-bar{top:68px;}
}
@media (max-width:767px){
  .grid-2{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .cta-band .btn{width:100%;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .spotlight-meta{gap:20px;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  .topbar{font-size:11px;}
  .topbar .container span.hide-sm{display:none;}
  .header-inner{flex-wrap:wrap;min-height:56px;padding:8px 0;gap:12px;}
  .brand-text{font-size:16px;}
  .header-actions{margin-left:auto;gap:10px;}
  .header-link{display:none;}
  .burger{display:grid;}
  .nav-chips{
    width:100%;order:5;display:none;padding:8px 0 4px;
    -webkit-mask-image:linear-gradient(90deg,transparent,#000 14px,#000 calc(100% - 14px),transparent);
    mask-image:linear-gradient(90deg,transparent,#000 14px,#000 calc(100% - 14px),transparent);
  }
  .nav-chips.is-open{display:flex;}
  .page-hero{padding:32px 0 40px;}
  .page-hero h1{font-size:28px;}
  .page-hero .lede{font-size:15px;}
  .section{padding:48px 0;}
  .section-sm{padding:40px 0;}
  .section-head h2{font-size:22px;}
  .anchor-bar{top:56px;}
  .spotlight{box-shadow:5px 5px 0 rgba(255,106,31,.28);}
  .cta-band h2{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:519px){
  .stat-strip{grid-template-columns:1fr;}
  .btn-lg{width:100%;}
}

/* roulang page: category3 */
:root{
  --brand:#FF6A1F;
  --brand-dark:#E85A12;
  --brand-soft:#FFF1E8;
  --teal:#1FC8A9;
  --teal-soft:#E6FAF6;
  --amber:#FFC53D;
  --ink:#14161C;
  --ink-2:#1E2129;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --line:#E7E9EE;
  --text:#1B1E24;
  --muted:#5C6470;
  --placeholder:#9AA1AC;
  --danger:#E5484D;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-chip:999px;
  --sd-card:0 1px 2px rgba(20,22,28,.06), 0 8px 24px -12px rgba(20,22,28,.18);
  --sd-hover:0 12px 32px -12px rgba(20,22,28,.28);
  --nav-h:68px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:"DIN Alternate",ui-monospace,"Roboto Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.85;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
a:hover{color:var(--brand)}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--ink)}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 48px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:var(--nav-h)}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;font-size:15px;box-shadow:0 4px 12px -6px rgba(255,106,31,.9)}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.nav-chips{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;flex:1 1 auto;padding:4px 2px}
.nav-chips::-webkit-scrollbar{display:none}
.nav-chip{position:relative;flex:0 0 auto;padding:8px 14px;border-radius:var(--r-chip);font-size:13.5px;font-weight:500;color:var(--muted);border:1px solid transparent;transition:all .18s var(--ease)}
.nav-chip:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-chip.is-active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.nav-chip.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:-5px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:24px;flex:0 0 auto}
.header-link{font-size:13.5px;color:var(--muted);font-weight:500}
.header-link:hover{color:var(--brand)}
.burger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);color:var(--ink);font-size:16px;align-items:center;justify-content:center}
.burger:hover{border-color:var(--brand);color:var(--brand)}
.quick-panel{display:none;border-top:1px solid var(--line);background:#fff}
.quick-panel.is-open{display:block;animation:fadeDown .22s var(--ease)}
.quick-panel .qp-inner{padding:16px 0 18px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
@keyframes fadeDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:all .18s var(--ease)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:9px}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand-soft);color:var(--brand-dark)}
.btn-outline-light{border-color:rgba(255,255,255,.34);color:#fff;background:transparent}
.btn-outline-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn:disabled{background:#E7E9EE;color:var(--placeholder);cursor:not-allowed}

/* ---------- hero ---------- */
.page-hero{position:relative;padding:52px 0 46px;background:linear-gradient(180deg,rgba(20,22,28,.93),rgba(20,22,28,.86)),url('/assets/images/backpic/back-3.webp') center/cover no-repeat;color:#fff;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);background-size:22px 22px;opacity:.06;pointer-events:none}
.page-hero .hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .95fr;gap:44px;align-items:center}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:16px}
.crumb a{color:rgba(255,255,255,.78)}
.crumb a:hover{color:#fff}
.crumb .sep{opacity:.5}
.crumb .current{color:rgba(255,255,255,.55)}
.page-hero h1{font-size:44px;line-height:1.22;letter-spacing:-.01em;color:#fff;font-weight:700}
.hero-sub{margin-top:14px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.78);max-width:560px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:32px;margin-top:28px}
.metric .m-val{font-family:var(--mono);font-size:22px;font-weight:700;color:#fff}
.metric .m-val em{font-style:normal;font-size:13px;color:var(--amber);margin-left:2px}
.metric .m-key{font-size:12.5px;color:rgba(255,255,255,.6);margin-top:2px}
.hero-media{border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,.16);background:#0F1116}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-media figcaption{font-size:12.5px;color:rgba(255,255,255,.6);padding:12px 16px;border-top:1px solid rgba(255,255,255,.1)}

/* ---------- anchor rail ---------- */
.anchor-bar{position:sticky;top:var(--nav-h);z-index:50;background:rgba(245,246,248,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.anchor-inner{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;padding:10px 0}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-chip{flex:0 0 auto;padding:7px 14px;border-radius:var(--r-chip);font-size:13px;color:var(--muted);border:1px solid var(--line);background:#fff;transition:all .18s var(--ease)}
.anchor-chip:hover{border-color:var(--brand);color:var(--brand)}
.anchor-chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section-white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:var(--ink);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:32px;line-height:1.35}
.section-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--brand-dark);background:var(--brand-soft);padding:6px 12px;border-radius:var(--r-chip);margin-bottom:14px}
.section-dark .eyebrow{background:rgba(255,106,31,.16);color:#FFB184}

/* ---------- prep cards ---------- */
.prep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prep-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sd-card);transition:all .22s var(--ease);position:relative;overflow:hidden}
.prep-card::after{content:"";position:absolute;right:0;bottom:0;width:8px;height:8px;background:var(--bg);clip-path:polygon(100% 0,100% 100%,0 100%)}
.prep-card:hover{transform:translateY(-3px);box-shadow:var(--sd-hover);border-color:#DDE1E8}
.prep-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--teal-soft);color:#0E9C81;font-size:17px}
.prep-card h3{font-size:18px;font-weight:600;margin-top:16px}
.prep-card p{font-size:14px;color:var(--muted);margin-top:10px;line-height:1.8}
.prep-list{margin-top:14px;border-top:1px dashed var(--line);padding-top:14px}
.prep-list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--muted);line-height:1.9}
.prep-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--teal)}

/* ---------- rail progress ---------- */
.rail-wrap{margin-bottom:52px;padding:22px 26px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sd-card)}
.rail{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.rail-node{flex:1 1 0;text-align:center;position:relative}
.rail-node::before{content:"";position:absolute;top:15px;left:-50%;width:100%;height:2px;background:var(--line)}
.rail-node:first-child::before{display:none}
.rail-node .dot{position:relative;z-index:2;display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:#fff;border:2px solid var(--line);font-family:var(--mono);font-size:13px;font-weight:700;color:var(--muted)}
.rail-node.is-done .dot{border-color:var(--brand);background:var(--brand);color:#fff}
.rail-node .r-txt{display:block;margin-top:10px;font-size:12.5px;color:var(--muted);line-height:1.6}
.rail-node.is-done .r-txt{color:var(--ink);font-weight:600}

/* ---------- timeline ---------- */
.timeline{position:relative}
.step{position:relative;display:grid;grid-template-columns:88px 1fr;gap:28px;padding-bottom:34px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:43px;top:56px;bottom:0;width:2px;background:linear-gradient(180deg,var(--line),rgba(231,233,238,.25))}
.step:last-child::before{display:none}
.step-idx{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;background:#fff;border:1px solid var(--line);font-family:var(--mono);font-size:17px;font-weight:700;color:var(--brand);box-shadow:var(--sd-card)}
.step-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 28px;box-shadow:var(--sd-card);transition:all .22s var(--ease)}
.step-body:hover{box-shadow:var(--sd-hover);border-color:#DDE1E8}
.step-body h3{font-size:20px;font-weight:600}
.step-body h3 .tag{display:inline-block;vertical-align:middle;margin-left:10px;font-size:12px;font-weight:500;padding:3px 10px;border-radius:var(--r-chip);background:var(--brand-soft);color:var(--brand-dark)}
.step-body p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.85}
.step-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:18px}
.step-box{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#FAFBFC}
.step-box h4{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.04em;margin-bottom:10px}
.step-box ul li{font-size:14px;color:var(--text);line-height:1.9;padding-left:14px;position:relative}
.step-box ul li::before{content:"";position:absolute;left:0;top:12px;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.tip{margin-top:18px;display:flex;gap:12px;padding:14px 18px;border-radius:12px;background:var(--teal-soft);border-left:3px solid var(--teal);font-size:13.5px;color:#0B6E5C;line-height:1.8}
.tip i{margin-top:4px;color:var(--teal)}
.tip.warn{background:var(--brand-soft);border-left-color:var(--brand);color:#9A4413}
.tip.warn i{color:var(--brand)}

/* ---------- flow map ---------- */
.flow-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.flow-map{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.flow-cell{display:flex;align-items:center;gap:12px;padding:16px 18px;border-radius:12px;background:#fff;border:1px solid var(--line);transition:all .2s var(--ease)}
.flow-cell:hover{border-color:var(--brand);transform:translateX(3px)}
.flow-cell .fc-num{font-family:var(--mono);font-size:13px;font-weight:700;color:#fff;background:var(--ink);width:26px;height:26px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.flow-cell:nth-child(2n) .fc-num{background:var(--brand)}
.flow-cell span.fc-txt{font-size:14px;font-weight:500}
.flow-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--sd-card)}
.flow-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.flow-media figcaption{font-size:12.5px;color:var(--muted);padding:12px 16px;border-top:1px solid var(--line)}

/* ---------- platform cards ---------- */
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.plat-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sd-card);transition:all .22s var(--ease)}
.plat-card:hover{box-shadow:var(--sd-hover);transform:translateY(-2px)}
.plat-top{display:flex;align-items:center;gap:12px}
.plat-top i{width:38px;height:38px;border-radius:11px;background:var(--brand-soft);color:var(--brand-dark);display:inline-flex;align-items:center;justify-content:center;font-size:16px}
.plat-top strong{font-size:17px;font-weight:600}
.plat-dl{margin-top:18px}
.plat-dl dt{font-size:12.5px;color:var(--muted);padding-left:10px;position:relative}
.plat-dl dt::before{content:"";position:absolute;left:0;top:7px;width:3px;height:12px;border-radius:2px;background:var(--line)}
.plat-dl dt.is-key::before{background:var(--teal)}
.plat-dl dd{margin:6px 0 14px;font-family:var(--mono);font-size:14px;color:var(--ink);font-weight:600}
.plat-dl dd span{font-family:var(--font);font-size:13.5px;color:var(--muted);font-weight:400}

/* ---------- faq ---------- */
.faq{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.faq-item.is-open{border-color:#F6C3A5;box-shadow:var(--sd-card)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;text-align:left;min-height:56px;padding:14px 22px;font-size:16px;font-weight:600;color:var(--ink)}
.faq-q i{color:var(--brand);font-size:14px;transition:transform .2s var(--ease)}
.faq-item.is-open .faq-q i{transform:rotate(135deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.9}

/* ---------- cta ---------- */
.cta-band{background:var(--ink);color:#fff;padding:64px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px}
.cta-inner h2{font-size:28px;color:#fff}
.cta-inner p{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.7);max-width:560px}
.cta-actions{display:flex;gap:12px;flex:0 0 auto}
.cta-card{margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px 30px;box-shadow:var(--sd-card)}
.cta-card .row-line{display:flex;flex-wrap:wrap;gap:28px}
.cta-card .row-line div{min-width:130px}
.cta-card .rl-key{font-size:12.5px;color:var(--muted)}
.cta-card .rl-val{font-family:var(--mono);font-size:16px;font-weight:700;color:var(--ink);margin-top:4px}
.cta-note{margin-top:20px;font-size:12.5px;color:var(--placeholder);line-height:1.8}

/* ---------- related ---------- */
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.rel-chip{padding:9px 16px;border-radius:var(--r-chip);border:1px solid var(--line);background:#fff;font-size:13.5px;color:var(--muted);transition:all .18s var(--ease)}
.rel-chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.back-home{display:inline-flex;align-items:center;gap:8px;margin-top:24px;font-size:14px;color:var(--muted)}
.back-home:hover{color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;font-size:13.5px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}
.site-footer .brand-text{color:#fff}
.footer-brand p{margin-top:16px;font-size:13px;line-height:1.9;color:rgba(255,255,255,.6)}
.footer-mark{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:12.5px;color:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-chip);padding:6px 12px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.62)}
.footer-links a:hover{color:var(--brand)}
.footer-form label{display:block;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:6px}
.footer-form input,.footer-form textarea{width:100%;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:11px 14px;font-size:13.5px;color:#fff;transition:all .18s var(--ease)}
.footer-form input{height:44px}
.footer-form textarea{min-height:88px;resize:vertical;margin-bottom:14px}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:rgba(255,255,255,.35)}
.footer-form input:focus,.footer-form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,31,.22)}
.form-hint{margin-top:12px;font-size:12px;color:rgba(255,255,255,.45);line-height:1.75}
.form-hint.is-ok{color:var(--teal)}
.form-hint.is-err{color:#FF8B8F}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:44px;padding-top:18px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:rgba(255,255,255,.45)}

/* ---------- to top ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transform:translateY(10px);transition:all .24s var(--ease);z-index:70}
.to-top.is-show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 32px}
}
@media (max-width:1023px){
  :root{--nav-h:56px}
  .container{padding:0 32px}
  .burger{display:inline-flex}
  .header-link{display:none}
  .nav-chips{flex:1 1 100%;order:3;padding:0 0 8px}
  .header-inner{flex-wrap:wrap;gap:10px 16px;padding-top:8px}
  .page-hero .hero-grid{grid-template-columns:1fr;gap:32px}
  .page-hero h1{font-size:34px}
  .section{padding:64px 0}
  .prep-grid,.plat-grid{grid-template-columns:repeat(2,1fr)}
  .step-cols{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr;gap:28px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .page-hero{padding:36px 0 34px}
  .page-hero h1{font-size:28px}
  .hero-metrics{gap:20px}
  .section{padding:48px 0}
  .section-head h2,.cta-inner h2{font-size:22px}
  .prep-grid,.plat-grid,.flow-map{grid-template-columns:1fr}
  .step{grid-template-columns:56px 1fr;gap:16px}
  .step::before{left:27px}
  .step-idx{width:44px;height:44px;border-radius:13px;font-size:15px}
  .step-body{padding:20px}
  .rail{padding-bottom:6px;overflow-x:auto}
  .rail-node{min-width:88px}
  .rail-node::before{left:-50%}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category4 */
/* ===== 设计变量 ===== */
:root{
  --brand:#FF6A1F;
  --brand-hover:#E85A12;
  --brand-soft:#FFF1E8;
  --teal:#1FC8A9;
  --teal-soft:#E6FAF6;
  --amber:#FFC53D;
  --ink:#14161C;
  --ink-2:#1E2129;
  --bg:#F5F6F8;
  --card:#FFFFFF;
  --line:#E7E9EE;
  --line-strong:#D5D9E0;
  --text:#1B1E24;
  --muted:#5C6470;
  --placeholder:#9AA1AC;
  --danger:#E5484D;
  --radius-card:16px;
  --radius-lg:20px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-chip:999px;
  --shadow-sm:0 1px 2px rgba(20,22,28,.06), 0 8px 24px -12px rgba(20,22,28,.18);
  --shadow-lg:0 12px 32px -12px rgba(20,22,28,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:"DIN Alternate",ui-monospace,"Roboto Mono",monospace;
  --header-h:68px;
}

/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease);}
a:hover{color:var(--brand-hover);}
button{font-family:inherit;cursor:pointer;}
input,textarea{font-family:inherit;font-size:14px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1{font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h2{font-size:32px;line-height:1.35;font-weight:700;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
::selection{background:var(--brand-soft);color:var(--brand-hover);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

/* 覆盖 Foundation 默认外观 */
body,button,input,textarea,select{font-family:var(--font);}
a.button,button.button,.button{background:var(--brand);color:#fff;border-radius:var(--radius-btn);}
.callout{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);color:var(--text);}
.accordion{border:none;background:transparent;}
.reveal{background:transparent;}
address{font-style:normal;}

/* ===== 容器 ===== */
.container{max-width:1200px;margin:0 auto;padding:0 48px;width:100%;}

/* ===== 顶部 header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  min-height:var(--header-h);
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;flex:0 0 auto;
}
.brand:hover{color:#fff;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand);color:#fff;font-size:15px;
  border:1px solid rgba(255,255,255,.22);
  box-shadow:inset 0 0 0 1px rgba(20,22,28,.25);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}

.nav-chips{
  display:flex;align-items:center;gap:6px;
  flex:1 1 auto;min-width:0;
  overflow-x:auto;scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chip{
  display:inline-block;white-space:nowrap;
  padding:7px 14px;border-radius:var(--radius-chip);
  font-size:13px;font-weight:500;letter-spacing:.02em;
  color:rgba(255,255,255,.7);
  border:1px solid transparent;
  border-bottom:2px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-chip:hover{background:rgba(255,106,31,.14);color:#FFC7A3;}
.nav-chip.is-active{
  background:rgba(255,106,31,.18);
  color:#FFB183;
  border-bottom-color:var(--brand);
  font-weight:600;
}

.header-actions{display:flex;align-items:center;gap:16px;margin-left:24px;flex:0 0 auto;}
.header-link{
  font-size:13px;color:rgba(255,255,255,.72);
  padding:6px 2px;border-bottom:1px dashed rgba(255,255,255,.28);
}
.header-link:hover{color:#fff;border-bottom-color:var(--brand);}
.burger{
  display:none;width:38px;height:38px;border-radius:9px;
  background:rgba(255,255,255,.08);color:#fff;
  border:1px solid rgba(255,255,255,.16);font-size:15px;
}
.burger:hover{background:rgba(255,255,255,.16);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:36px;padding:0 16px;font-size:13px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{background:#E7E9EE;color:var(--placeholder);cursor:not-allowed;transform:none;}

/* ===== 通用标签 ===== */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-chip);
  font-size:12px;font-weight:500;letter-spacing:.02em;
  background:var(--teal-soft);color:#0F8C76;border:1px solid rgba(31,200,169,.28);
}
.chip-brand{background:var(--brand-soft);color:var(--brand-hover);border-color:rgba(255,106,31,.25);}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ===== 页面头（矮首屏） ===== */
.page-head{
  position:relative;
  background:linear-gradient(180deg,#FFFFFF 0%,#F7F8FA 100%);
  border-bottom:1px solid var(--line);
  padding:44px 0 48px;
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(20,22,28,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(20,22,28,.035) 1px,transparent 1px);
  background-size:32px 32px;
  pointer-events:none;
}
.page-head .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:16px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--placeholder);}
.breadcrumb .current{color:var(--muted);}

.page-head-grid{
  display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center;
}
.page-head h1{color:var(--ink);margin-bottom:14px;}
.page-head .lead{
  font-size:17px;line-height:1.85;color:var(--muted);max-width:600px;
}
.head-media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  background:#E9EBEF url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  box-shadow:var(--shadow-sm);
}
.head-media img{width:100%;height:100%;object-fit:cover;}
.head-media .media-tag{
  position:absolute;left:16px;bottom:16px;
  background:rgba(20,22,28,.78);color:#fff;
  font-size:12px;padding:6px 12px;border-radius:var(--radius-chip);
  backdrop-filter:blur(2px);
}

.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  margin-top:34px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;
}
.stat-item{padding:18px 22px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:none;}
.stat-item .k{font-size:12px;color:var(--muted);letter-spacing:.02em;}
.stat-item .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:16px;font-weight:600;color:var(--ink);margin-top:4px;}
.stat-item .v.accent{color:var(--brand);}

/* ===== 锚点条 ===== */
.anchor-bar{
  position:sticky;top:var(--header-h);z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;align-items:center;gap:8px;overflow-x:auto;
  padding:10px 0;scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-chip{
  white-space:nowrap;font-size:13px;font-weight:500;
  padding:6px 14px;border-radius:var(--radius-chip);
  color:var(--muted);border:1px solid var(--line);
  background:#fff;
  transition:all .18s var(--ease);
}
.anchor-chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.anchor-chip.is-active{background:var(--brand-soft);border-color:rgba(255,106,31,.4);color:var(--brand-hover);font-weight:600;}

/* ===== 板块 ===== */
.section{padding:80px 0;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{color:var(--ink);margin-bottom:14px;position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;
  border-radius:2px;background:var(--brand);
}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.9;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head.center h2{padding-left:0;}
.section-head.center h2::before{display:none;}

/* ===== 左右对比卡 ===== */
.compare-grid{
  display:grid;grid-template-columns:1fr 76px 1fr;gap:0;align-items:stretch;
}
.compare-card{
  border:1px solid var(--line-strong);border-radius:var(--radius-card);
  background:#fff;padding:28px;
  position:relative;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.compare-card::after{
  content:"";position:absolute;right:0;bottom:0;width:14px;height:14px;
  background:linear-gradient(135deg,transparent 50%,rgba(20,22,28,.06) 50%);
  border-bottom-right-radius:var(--radius-card);
}
.compare-card:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.compare-card.is-teal{border-top:3px solid var(--teal);}
.compare-card.is-brand{border-top:3px solid var(--brand);}
.compare-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.compare-icon{
  width:40px;height:40px;border-radius:11px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;
}
.icon-brand{background:var(--brand-soft);color:var(--brand);border:1px solid rgba(255,106,31,.22);}
.icon-teal{background:var(--teal-soft);color:#0F8C76;border:1px solid rgba(31,200,169,.28);}
.compare-head h3{font-size:18px;color:var(--ink);}
.compare-head .sub{font-size:12px;color:var(--muted);font-weight:400;}

.compare-list{margin:0 0 18px;}
.compare-list li{
  position:relative;padding:9px 0 9px 20px;
  font-size:14.5px;color:var(--muted);line-height:1.7;
  border-bottom:1px dashed var(--line);
}
.compare-list li:last-child{border-bottom:none;}
.compare-list li::before{
  content:"";position:absolute;left:0;top:17px;
  width:7px;height:7px;border-radius:2px;background:var(--brand);
}
.compare-card.is-teal .compare-list li::before{background:var(--teal);}
.compare-list li strong{color:var(--ink);font-weight:600;}

.compare-foot{
  font-size:12.5px;color:var(--placeholder);
  padding-top:14px;border-top:1px solid var(--line);
}

.vs-badge{
  display:flex;align-items:center;justify-content:center;
}
.vs-badge span{
  width:52px;height:52px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);color:#fff;font-size:12px;font-weight:700;
  font-family:var(--mono);letter-spacing:.06em;
  border:3px solid var(--bg);
}

/* ===== 场景对照区 ===== */
.triple-compare{display:grid;gap:24px;}
.pair-row{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border:1px solid var(--line-strong);border-radius:var(--radius-card);
  overflow:hidden;background:#fff;
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.pair-row:hover{border-color:var(--brand);box-shadow:var(--shadow-sm);}
.pair-cell{padding:24px 26px;}
.pair-cell + .pair-cell{border-left:1px solid var(--line);}
.pair-cell .pair-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:3px 10px;border-radius:var(--radius-chip);margin-bottom:12px;
}
.label-cause{background:#FDF0F0;color:#B03A3E;border:1px solid rgba(229,72,77,.22);}
.label-action{background:var(--teal-soft);color:#0F8C76;border:1px solid rgba(31,200,169,.28);}
.pair-cell h3{font-size:16.5px;color:var(--ink);margin-bottom:8px;}
.pair-cell p{font-size:14.5px;color:var(--muted);line-height:1.85;}
.pair-cell ul{margin-top:10px;}
.pair-cell ul li{
  position:relative;padding-left:18px;font-size:14px;color:var(--muted);line-height:1.8;
}
.pair-cell ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--line-strong);
}
.pair-row.is-teal .pair-cell ul li::before{background:var(--teal);}

/* ===== 节奏 / 日志卡 ===== */
.log-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.log-card{
  background:#fff;border:1px solid var(--line-strong);border-radius:var(--radius-card);
  padding:26px;position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.log-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line);}
.log-card .log-date{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:600;color:var(--brand);
  padding-bottom:12px;margin-bottom:16px;
  border-bottom:1px dashed var(--line);
  display:flex;align-items:center;gap:8px;
}
.log-card h3{font-size:17px;color:var(--ink);margin-bottom:10px;}
.log-card p{font-size:14px;color:var(--muted);line-height:1.85;}
.log-card .log-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;
}
.log-card .log-meta span{
  font-size:12px;padding:3px 10px;border-radius:var(--radius-chip);
  background:var(--bg);color:var(--muted);border:1px solid var(--line);
}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line-strong);
  border-radius:14px;margin-bottom:10px;overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--brand);}
.faq-item.is-open{border-color:var(--brand);box-shadow:var(--shadow-sm);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:none;text-align:left;
  padding:17px 22px;min-height:56px;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--brand-hover);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);
  font-size:13px;transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--brand);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{
  padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--muted);
  border-top:1px solid var(--line);padding-top:16px;margin:0 22px 20px;padding-left:0;padding-right:0;
}
.faq-a-inner strong{color:var(--ink);}

/* ===== CTA 卡 ===== */
.cta-card{
  background:var(--ink);color:#fff;border-radius:var(--radius-lg);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-card::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:18px 18px;pointer-events:none;
}
.cta-card .cta-text{position:relative;z-index:2;}
.cta-card h2{font-size:26px;color:#fff;margin-bottom:8px;}
.cta-card p{font-size:14.5px;color:rgba(255,255,255,.66);max-width:560px;line-height:1.8;}
.cta-card .cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex:0 0 auto;}
.cta-card .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;}
.cta-card .btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:transparent;}

/* ===== 相关分类 ===== */
.rel-links{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  padding-top:32px;margin-top:32px;border-top:1px solid var(--line);
}
.rel-links .rel-label{font-size:13px;color:var(--muted);margin-right:4px;}
.rel-chip{
  font-size:13.5px;padding:8px 18px;border-radius:var(--radius-chip);
  border:1px solid var(--line-strong);color:var(--text);background:#fff;
  transition:all .18s var(--ease);
}
.rel-chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.back-home{font-size:13.5px;color:var(--muted);margin-left:auto;}
.back-home:hover{color:var(--brand);}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.58);max-width:340px;}
.footer-mark{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-size:12px;font-family:var(--mono);font-variant-numeric:tabular-nums;
  padding:5px 12px;border-radius:var(--radius-chip);
  background:rgba(255,255,255,.07);color:rgba(255,255,255,.72);
  border:1px solid rgba(255,255,255,.1);
}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:13px;color:rgba(255,255,255,.6);}
.footer-links a:hover{color:var(--brand);}
.footer-form label{display:block;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:7px;}
.footer-form input,.footer-form textarea{
  width:100%;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-btn);
  color:#fff;padding:11px 14px;height:44px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.footer-form textarea{height:82px;resize:vertical;padding-top:11px;line-height:1.6;}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:rgba(255,255,255,.35);}
.footer-form input:focus,.footer-form textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(255,106,31,.22);
}
.footer-form .btn{margin-top:14px;}
.form-hint{font-size:12px;color:rgba(255,255,255,.45);margin-top:10px;line-height:1.7;}
.form-hint.is-error{color:#FF8A8E;}
.form-hint.is-ok{color:var(--teal);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:12px;color:rgba(255,255,255,.42);
}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#fff;border:1px solid rgba(255,255,255,.14);
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .22s var(--ease),transform .22s var(--ease),background .18s var(--ease);
}
.to-top.is-show{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{background:var(--brand);}

/* ===== 响应式 ===== */
@media(max-width:1279px){
  .container{padding:0 32px;}
  h1{font-size:38px;}
}
@media(max-width:1023px){
  :root{--header-h:56px;}
  .container{padding:0 32px;}
  .site-header{position:sticky;}
  .header-inner{flex-wrap:wrap;padding:8px 0;gap:12px;}
  .brand-text{font-size:16px;}
  .has-collapsed-nav .nav-chips{display:none;}
  .nav-chips{
    order:3;flex-basis:100%;width:100%;
    padding-bottom:4px;
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
  }
  .header-actions{margin-left:auto;gap:10px;}
  .header-link{display:none;}
  .burger{display:inline-flex;}
  .anchor-bar{top:var(--header-h);}
  .section{padding:64px 0;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  .page-head-grid{grid-template-columns:1fr;gap:32px;}
  .head-media{aspect-ratio:16/9;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:none;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .compare-grid{grid-template-columns:1fr;gap:16px;}
  .vs-badge span{width:44px;height:44px;}
  .log-strip{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-card{flex-direction:column;align-items:flex-start;padding:36px 32px;}
  .cta-card .cta-actions{width:100%;}
}
@media(max-width:767px){
  .pair-row{grid-template-columns:1fr;}
  .pair-cell + .pair-cell{border-left:none;border-top:1px solid var(--line);}
}
@media(max-width:639px){
  .container{padding:0 20px;}
  body{font-size:15.5px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .section{padding:48px 0;}
  .section-head{margin-bottom:28px;}
  .page-head{padding:28px 0 36px;}
  .page-head .lead{font-size:15.5px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-right:none;border-bottom:1px solid var(--line);}
  .stat-item:last-child{border-bottom:none;}
  .compare-card{padding:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-card{padding:28px 22px;}
  .cta-card .cta-actions{flex-direction:column;}
  .cta-card .btn{width:100%;}
  .back-home{margin-left:0;width:100%;}
  .to-top{right:16px;bottom:16px;}
  .btn{height:48px;}
  .btn-sm{height:36px;}
}