/* roulang page: index */
:root{
  --brand:#FF5A2B;
  --brand-dark:#E44A1E;
  --teal:#0FA88C;
  --ink:#12171C;
  --ink-2:#1B222A;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DC;
  --text:#1A1F24;
  --text-2:#5A6472;
  --text-3:#8A929C;
  --accent:#FFC53D;
  --danger:#D93F3F;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh:0 1px 2px rgba(18,23,28,.05),0 10px 28px -14px rgba(18,23,28,.16);
  --sh-h:0 18px 40px -16px rgba(18,23,28,.26);
  --t:180ms ease-out;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16.5px;
  line-height:1.8;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--t),background var(--t),border-color var(--t)}
a:hover{color:var(--brand)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
h2{font-size:32px}
h3{font-size:22px;font-weight:600}
h4{font-size:18px;font-weight:600}
p{margin:0}
:focus-visible{outline:3px solid rgba(255,90,43,.4);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";letter-spacing:.01em}
.muted{color:var(--text-2)}
.weak{color:var(--text-3)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:140;
  height:76px;
  display:flex;align-items:center;
  background:rgba(247,245,242,.78);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:height var(--t),background var(--t),border-color var(--t);
}
.site-header.scrolled{height:60px;background:#FFFFFF;border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:28px;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex-shrink:0;
  background:var(--ink);
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.brand-mark::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 70% 30%, rgba(255,90,43,.95) 0 5px, transparent 6px),
    linear-gradient(135deg,transparent 46%, rgba(15,168,140,.9) 46% 56%, transparent 56%);
}
.brand-mark span{
  position:relative;z-index:2;color:#fff;font-size:17px;font-weight:700;letter-spacing:-.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-text i{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.18em}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-item{position:relative}
.nav-item > a,.nav-item > button{
  display:flex;align-items:center;gap:6px;
  height:40px;padding:0 14px;border:0;background:transparent;
  font-size:15.5px;font-weight:500;color:var(--text);cursor:pointer;border-radius:8px;
  position:relative;
}
.nav-item > a::after,.nav-item > button::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-item:hover > a,.nav-item:hover > button,
.nav-item.active > a,.nav-item.active > button{color:var(--brand)}
.nav-item:hover > a::after,.nav-item:hover > button::after,
.nav-item.active > a::after,.nav-item.active > button::after{transform:scaleX(1)}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.6}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--text-2);cursor:pointer;
}
.nav-search:hover{color:var(--brand);border-color:#d9d3cb}

/* mega */
.mega{
  position:absolute;top:calc(100% + 10px);left:-14px;
  width:800px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-h);padding:22px;opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);overflow:hidden;
}
.mega::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand)}
.nav-item.open .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:22px;padding-top:6px}
.mega-title{font-size:12.5px;letter-spacing:.12em;color:var(--text-3);font-weight:600;margin-bottom:8px}
.mega-row{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px}
.mega-row:hover{background:var(--bg)}
.mega-dot{width:20px;height:20px;border-radius:6px;background:rgba(15,168,140,.16);flex-shrink:0;position:relative}
.mega-dot::after{content:"";position:absolute;inset:6px;border-radius:3px;background:var(--teal);transition:background var(--t)}
.mega-row:hover .mega-dot::after{background:var(--brand)}
.mega-row span{font-size:14.5px;font-weight:500}
.mega-row em{margin-left:auto;font-style:normal;font-size:12.5px;color:var(--text-3)}
.mega-mini{display:flex;gap:12px;align-items:center;padding:9px 10px;border-radius:10px}
.mega-mini:hover{background:var(--bg)}
.mega-mini img{width:64px;height:48px;object-fit:cover;border-radius:8px;flex-shrink:0}
.mega-mini p{font-size:13.5px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mega-mini time{font-size:11.5px;color:var(--text-3)}
.mega-cta{
  margin-top:12px;background:var(--ink);border-radius:12px;padding:16px 18px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.mega-cta p{font-size:13.5px;color:rgba(255,255,255,.72)}

/* buttons */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);border:0;
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
}
.btn-primary-x{background:var(--brand);color:#fff;box-shadow:0 8px 18px -10px rgba(255,90,43,.85)}
.btn-primary-x:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(255,90,43,.9)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:#fff;color:var(--text);border:1.5px solid var(--line)}
.btn-ghost-x:hover{background:var(--bg);color:var(--text);border-color:#d3cdc5;transform:translateY(-2px)}
.btn-teal-x{background:#fff;color:var(--teal);border:1.5px solid rgba(15,168,140,.45)}
.btn-teal-x:hover{background:rgba(15,168,140,.08);color:var(--teal);transform:translateY(-2px)}
.btn-sm-x{height:40px;padding:0 16px;font-size:14.5px}
.btn-block-x{width:100%}
.btn-light-x{background:#fff;color:var(--ink)}
.btn-light-x:hover{background:#fff;color:var(--brand)}
.btn:focus,.btn:focus-visible{box-shadow:none}

/* ---------- hero ---------- */
.hero{
  position:relative;padding:152px 0 96px;overflow:hidden;
  background:var(--ink);
}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.55}
.hero-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(18,23,28,.86) 0%,rgba(18,23,28,.7) 55%,rgba(18,23,28,.94) 100%)}
.hero-track{position:absolute;left:0;right:0;bottom:78px;height:2px;background:rgba(255,255,255,.08)}
.hero-track::after{content:"";position:absolute;left:0;top:-1px;width:34%;height:4px;background:var(--brand);opacity:.5;border-radius:2px}
.hero-inner{position:relative;z-index:3;display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
  background:rgba(255,90,43,.14);border:1px solid rgba(255,90,43,.4);color:#FFB79E;
  font-size:13px;font-weight:600;letter-spacing:.04em;margin-bottom:20px;
}
.hero h1{color:#fff;font-size:44px;line-height:1.22;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{color:rgba(255,255,255,.72);font-size:17.5px;margin-bottom:28px;max-width:460px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}
.trust div{display:flex;align-items:baseline;gap:7px;font-size:13px;color:rgba(255,255,255,.6)}
.trust b{font-size:15px;color:#fff;font-weight:600}
.trust .hl{color:var(--accent)}
.hero-visual{position:relative}
.hero-shot{
  border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,.16);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.9);
}
.hero-shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-badge{
  position:absolute;left:-20px;bottom:-22px;background:#fff;border-radius:12px;padding:14px 18px;
  box-shadow:0 18px 40px -18px rgba(0,0,0,.6);display:flex;align-items:center;gap:12px;
}
.hero-badge i{
  font-style:normal;width:40px;height:40px;border-radius:10px;background:rgba(15,168,140,.14);
  color:var(--teal);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
}
.hero-badge b{display:block;font-size:15px}
.hero-badge span{font-size:12.5px;color:var(--text-3)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section.white{background:#fff}
.sec-head{margin-bottom:40px;max-width:720px}
.sec-head .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand);letter-spacing:.1em;margin-bottom:12px;
}
.sec-head .kicker::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--brand)}
.sec-head p{color:var(--text-2);margin-top:14px;font-size:16px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .kicker{justify-content:center}

/* value block */
.value-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.value-photo{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);min-height:420px}
.value-photo img{width:100%;height:100%;object-fit:cover}
.value-photo figcaption{
  position:absolute;left:20px;right:20px;bottom:20px;background:rgba(18,23,28,.82);
  border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:14px 16px;color:#fff;
}
.value-photo figcaption b{display:block;font-size:15px;margin-bottom:2px}
.value-photo figcaption span{font-size:13px;color:rgba(255,255,255,.72)}
.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mini-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t);
  display:flex;flex-direction:column;gap:10px;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.mini-ico{
  width:44px;height:44px;border-radius:12px;background:rgba(15,168,140,.14);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
}
.mini-card h3{font-size:17px}
.mini-card p{font-size:14.5px;color:var(--text-2);line-height:1.7}

/* carousel */
.shot-carousel .carousel-item{padding:0 0 8px}
.shot-frame{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:14px;
  box-shadow:var(--sh);
}
.shot-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img)}
.shot-meta{display:flex;align-items:center;gap:14px;margin-top:16px}
.shot-meta .idx{
  font-size:26px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1;
}
.shot-meta b{font-size:16px}
.shot-meta span{font-size:14px;color:var(--text-2)}
.carousel-indicators{position:static;margin:26px 0 0;gap:8px}
.carousel-indicators [data-bs-target]{
  width:8px;height:8px;border-radius:999px;background:#CFC9C1;opacity:1;border:0;margin:0;
  transition:width var(--t),background var(--t);
}
.carousel-indicators .active{width:24px;background:var(--brand)}
.carousel-control-prev,.carousel-control-next{
  width:48px;height:48px;top:38%;border-radius:50%;background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh);opacity:1;color:var(--ink);display:flex;align-items:center;justify-content:center;
}
.carousel-control-prev{left:-8px}
.carousel-control-next{right:-8px}
.carousel-control-prev:hover,.carousel-control-next:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.carousel-control-prev-icon,.carousel-control-next-icon{width:16px;height:16px;filter:invert(1)}
.carousel-control-prev:hover .carousel-control-next-icon,.carousel-control-next:hover .carousel-control-next-icon{filter:none}

/* spec tabs */
.spec-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.spec-tab{
  height:40px;padding:0 20px;border-radius:999px;border:1.5px solid var(--line);background:#fff;
  font-size:14.5px;font-weight:600;color:var(--text-2);cursor:pointer;transition:all var(--t);
}
.spec-tab:hover{border-color:#cfc9c1;color:var(--text)}
.spec-tab.active{background:var(--brand);border-color:var(--brand);color:#fff}
.spec-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:8px 26px 22px;box-shadow:var(--sh)}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:20px;height:52px;border-bottom:1px dashed var(--line)}
.spec-row:last-of-type{border-bottom:0}
.spec-row span{font-size:14.5px;color:var(--text-3)}
.spec-row b{font-size:15px;font-weight:600}
.spec-foot{display:inline-block;margin-top:14px;font-size:14px;color:var(--teal);font-weight:600;border-bottom:1px solid rgba(15,168,140,.4)}

/* reviews */
.review-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.review-col{display:flex;flex-direction:column;gap:16px}
.review-col.offset{padding-top:36px}
.review{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t);
}
.review:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:16px;
}
.review-top b{display:block;font-size:15px}
.review-top time{font-size:12.5px;color:var(--text-3)}
.review p{font-size:16px;line-height:1.8;color:#2A3037}
.badge-x{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(15,168,140,.12);color:var(--teal);font-size:12px;font-weight:600;
}
.badge-hot{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--brand);color:#fff;font-size:12px;font-weight:600}
.badge-num{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--accent);color:#5C3E00;font-size:12px;font-weight:700}

/* download */
.dl-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px;
  box-shadow:var(--sh);display:grid;grid-template-columns:1fr 190px;gap:32px;align-items:center;
}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.qr-box{
  aspect-ratio:1/1;border:1px solid var(--line);border-radius:var(--r-img);background:var(--bg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:10px;
}
.qr-grid{
  width:104px;height:104px;border-radius:8px;
  background:
    linear-gradient(90deg,#12171C 8px,transparent 8px) 0 0/16px 16px,
    linear-gradient(180deg,#12171C 8px,transparent 8px) 0 0/16px 16px,
    #fff;
  border:6px solid #fff;box-shadow:0 0 0 1px var(--line);
}
.qr-box span{font-size:12.5px;color:var(--text-3)}
.dl-note{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.dl-note b{color:var(--text-2);font-weight:600}

/* news */
.news-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px}
.news-feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh);display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t);
}
.news-feature:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.news-feature .thumb{overflow:hidden}
.news-feature img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--t)}
.news-feature:hover img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-feature:hover h3{color:var(--brand)}
.news-body p{font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;font-size:13px;color:var(--text-3)}
.news-meta .more{margin-left:auto;color:var(--brand);font-weight:600}
.news-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);padding:6px 20px}
.news-row{display:flex;gap:14px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);transition:background var(--t)}
.news-row:last-child{border-bottom:0}
.news-row:hover{background:#FBF9F7}
.news-row img{width:96px;height:64px;object-fit:cover;border-radius:10px;flex-shrink:0}
.news-row .txt{min-width:0;flex:1}
.news-row h4{font-size:15.5px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row:hover h4{color:var(--brand)}
.news-row p{font-size:13px;color:var(--text-3);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-row time{font-size:12.5px;color:var(--text-3);flex-shrink:0}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;text-align:center;
}
.empty-ico{
  width:56px;height:56px;margin:0 auto 16px;border-radius:14px;background:rgba(15,168,140,.1);
  display:flex;align-items:center;justify-content:center;color:var(--teal);font-size:22px;
}
.empty-state p{color:var(--text-2);margin-bottom:18px}

/* faq */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;padding:22px 4px;background:transparent;border:0;
  text-align:left;font-size:17px;font-weight:600;color:var(--text);cursor:pointer;
}
.faq-q:hover{color:var(--brand)}
.faq-sign{
  margin-left:auto;width:24px;height:24px;flex-shrink:0;position:relative;
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--text-3);border-radius:2px;transition:transform var(--t),background var(--t);
}
.faq-sign::before{left:0;right:0;top:11px;height:2px}
.faq-sign::after{top:0;bottom:0;left:11px;width:2px}
.faq-item.open .faq-sign::after{transform:scaleY(0)}
.faq-item.open .faq-sign::before{background:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease-out}
.faq-a > div{
  background:var(--bg);border-radius:10px;padding:18px 20px;margin:0 0 20px;color:var(--text-2);line-height:1.85;font-size:15.5px;
}
.faq-item.open .faq-a{max-height:420px}

/* cta */
.cta-band{position:relative;overflow:hidden;background:var(--ink);padding:64px 0}
.cta-band .cta-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.35}
.cta-band .cta-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,23,28,.95),rgba(18,23,28,.72))}
.cta-band .cta-line{position:absolute;left:0;right:0;top:50%;height:2px;background:repeating-linear-gradient(90deg,rgba(255,90,43,.5) 0 28px,transparent 28px 56px)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:30px;margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15.5px}

/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}
.footer-grid > div{padding-right:24px;border-right:1px solid rgba(255,255,255,.08)}
.footer-grid > div:last-child{border-right:0;padding-right:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.1)}
.footer-brand b{color:#fff;font-size:17px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em}
.footer-link{display:block;padding:6px 0;font-size:14.5px;color:rgba(255,255,255,.72);border-bottom:2px solid transparent;width:fit-content;transition:color var(--t),border-color var(--t)}
.footer-link:hover{color:#fff;border-bottom-color:var(--brand)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin-bottom:16px;max-width:300px}
.footer-qr{width:104px;height:104px;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);display:flex;align-items:center;justify-content:center;font-size:12.5px;color:rgba(255,255,255,.6);text-align:center;padding:8px}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);padding:20px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}
.to-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;background:#fff;
  border:1px solid var(--line);box-shadow:var(--sh);display:flex;align-items:center;justify-content:center;
  color:var(--ink);cursor:pointer;opacity:0;visibility:hidden;transition:all var(--t);z-index:120;font-size:16px;
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* mobile drawer */
.drawer{background:var(--bg)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-nav{padding:12px 20px 100px}
.drawer-nav a{display:block;padding:16px 0 16px 14px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;position:relative}
.drawer-nav a.active,.drawer-nav a:hover{color:var(--brand)}
.drawer-nav a.active::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--brand)}
.drawer-foot{position:fixed;left:0;right:0;bottom:0;padding:14px 20px;background:#fff;border-top:1px solid var(--line)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media (max-width:1399.98px){.wrap{max-width:1200px}}
@media (max-width:1199.98px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero h1{font-size:38px}
  .value-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .mega{width:680px}
}
@media (max-width:991.98px){
  .nav-main,.nav-search{display:none}
  .nav-toggle{display:flex}
  .section{padding:72px 0}
  .section.tight{padding:56px 0}
  .dl-panel{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-grid > div{border-right:0;padding-right:0}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .hero{padding:120px 0 64px}
  .hero h1{font-size:30px}
  .hero-actions .btn-x{width:100%}
  .hero-badge{position:static;margin-top:16px}
  .section,.section.tight{padding:56px 0}
  h2{font-size:24px}
  .mini-grid{grid-template-columns:1fr}
  .review-cols{grid-template-columns:1fr}
  .review-col.offset{padding-top:0}
  .carousel-control-prev,.carousel-control-next{display:none}
  .brand-text i{display:none}
  .news-row{flex-direction:column;align-items:flex-start}
  .news-row img{width:100%;height:auto;aspect-ratio:16/9}
  .news-row time{margin-top:6px}
  .cta-inner h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:575.98px){
  .hero-track,.hero-track::after{display:none}
  .spec-panel{padding:6px 18px 18px}
  .dl-panel{padding:22px}
  .brand-text b{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .mini-card:hover,.news-feature:hover,.review:hover,.btn-x:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --orange:#FF5A2B;
  --orange-dark:#E44A1E;
  --teal:#0FA88C;
  --ink:#12171C;
  --ink-2:#1B222A;
  --paper:#F7F5F2;
  --white:#FFFFFF;
  --line:#E6E2DC;
  --t1:#1A1F24;
  --t2:#5A6472;
  --t3:#8A929C;
  --gold:#FFC53D;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh:0 1px 2px rgba(18,23,28,.05),0 10px 28px -14px rgba(18,23,28,.16);
  --sh-hover:0 18px 40px -16px rgba(18,23,28,.26);
  --num:"Oswald","Barlow Condensed","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--t1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--orange);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease)}
a:hover{color:var(--orange-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--t1)}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:0;list-style:none}
figure{margin:0}
:focus-visible{outline:3px solid rgba(255,90,43,.4);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.wrap{max-width:1320px}}
.num{font-family:var(--num);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:height var(--ease),background-color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header .nav-inner{
  height:76px;display:flex;align-items:center;gap:28px;
  transition:height var(--ease);
}
.site-header.is-shrink{background:#fff;border-bottom-color:var(--line);box-shadow:0 6px 18px -14px rgba(18,23,28,.4)}
.site-header.is-shrink .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--t1);flex:0 0 auto}
.brand:hover{color:var(--t1)}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:var(--ink);display:grid;place-items:center;
  position:relative;overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;right:-8px;bottom:-8px;width:22px;height:22px;
  border:2px solid var(--orange);border-radius:50%;opacity:.85;
}
.brand-mark span{color:#fff;font-size:15px;font-weight:700;letter-spacing:0}
.brand-text{font-size:17px;font-weight:700;line-height:1.15;display:block}
.brand-text em{display:block;font-style:normal;font-size:11.5px;font-weight:400;color:var(--t3);letter-spacing:.04em}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-item{position:relative}
.nav-item>a,.nav-item>button{
  display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 14px;border:0;background:transparent;
  font-size:15.5px;color:var(--t1);cursor:pointer;border-radius:8px;
  position:relative;transition:color var(--ease),background-color var(--ease);
}
.nav-item>a::after,.nav-item>button::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.nav-item>a:hover,.nav-item>button:hover{color:var(--orange)}
.nav-item>a:hover::after,.nav-item>button:hover::after{transform:scaleX(1)}
.nav-item.active>a,.nav-item.active>button{color:var(--orange);font-weight:600}
.nav-item.active>a::after,.nav-item.active>button::after{transform:scaleX(1)}
.caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform var(--ease)}
.nav-item.open .caret{transform:rotate(-135deg) translateY(-2px)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{
  width:150px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;padding:0 12px 0 34px;font-size:14px;color:var(--t1);
  transition:border-color var(--ease),box-shadow var(--ease),width var(--ease);
}
.search-box input::placeholder{color:var(--t3)}
.search-box input:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,90,43,.2);width:190px}
.search-box .s-ico{position:absolute;left:11px;width:14px;height:14px;border:2px solid var(--t3);border-radius:50%;pointer-events:none}
.search-box .s-ico::after{content:"";position:absolute;right:-5px;bottom:-4px;width:7px;height:2px;background:var(--t3);transform:rotate(45deg);border-radius:2px}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);border:1.5px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease),filter var(--ease);
}
.btn-sm-x{height:40px;padding:0 18px;font-size:14.5px}
.btn-primary-x{background:var(--orange);color:#fff;box-shadow:0 8px 20px -12px rgba(255,90,43,.9)}
.btn-primary-x:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px -12px rgba(228,74,30,.75)}
.btn-primary-x:active{transform:translateY(1px);box-shadow:none}
.btn-ghost-x{background:#fff;color:var(--t1);border-color:var(--teal)}
.btn-ghost-x:hover{background:var(--paper);color:var(--t1);transform:translateY(-2px)}
.btn-ghost-x:active{transform:translateY(1px)}
.btn-line-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-line-x:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  position:relative;cursor:pointer;
}
.nav-toggle span{position:absolute;left:12px;right:12px;height:2px;background:var(--t1);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* mega */
.mega{
  position:absolute;top:calc(100% + 12px);left:-14px;width:780px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-hover);padding:0;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  z-index:90;overflow:hidden;
}
.mega::before{content:"";display:block;height:3px;background:var(--orange)}
.nav-item:hover .mega,.nav-item.open .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:0}
.mega-grid>div{padding:20px 22px}
.mega-grid>div+div{border-left:1px solid var(--line)}
.mega-title{font-size:12.5px;letter-spacing:.12em;color:var(--t3);margin:0 0 12px;font-weight:600}
.mega-row{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;
  color:var(--t1);font-size:14.5px;transition:background-color var(--ease),color var(--ease);
}
.mega-row em{margin-left:auto;font-style:normal;font-family:var(--num);font-size:12.5px;color:var(--t3)}
.mega-dot{width:20px;height:20px;border-radius:6px;background:rgba(15,168,140,.14);flex:0 0 auto;position:relative;transition:background-color var(--ease)}
.mega-dot::after{content:"";position:absolute;inset:6px;border-radius:3px;background:var(--teal);transition:background-color var(--ease)}
.mega-row:hover{background:var(--paper);color:var(--t1)}
.mega-row:hover .mega-dot{background:rgba(255,90,43,.16)}
.mega-row:hover .mega-dot::after{background:var(--orange)}
.mega-mini{display:flex;gap:10px;padding:8px;border-radius:10px;color:var(--t1);transition:background-color var(--ease)}
.mega-mini:hover{background:var(--paper);color:var(--t1)}
.mega-mini img{width:64px;height:48px;object-fit:cover;border-radius:8px;flex:0 0 auto}
.mega-mini p{margin:0;font-size:14px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mega-mini time{display:block;margin-top:4px;font-family:var(--num);font-size:12px;color:var(--t3)}
.mega-cta{margin-top:12px;background:var(--ink);border-radius:10px;padding:16px 16px 18px}
.mega-cta p{color:rgba(255,255,255,.78);font-size:14px;margin:0 0 12px;line-height:1.6}

/* drawer */
.drawer{
  position:fixed;inset:0 0 0 auto;width:82%;max-width:360px;background:#fff;z-index:95;
  transform:translateX(102%);transition:transform 240ms ease-out;
  display:flex;flex-direction:column;box-shadow:-20px 0 50px -20px rgba(18,23,28,.5);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-head b{font-size:16px}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:18px;color:var(--t2);cursor:pointer;line-height:1}
.drawer-body{padding:14px 20px;overflow-y:auto;flex:1}
.drawer-body a{display:block;padding:13px 12px;border-radius:10px;color:var(--t1);font-size:15.5px;border-left:3px solid transparent}
.drawer-body a:hover{background:var(--paper)}
.drawer-body a.is-current{color:var(--orange);border-left-color:var(--orange);font-weight:600;background:var(--paper)}
.drawer-sub{padding:6px 12px 4px;font-size:12.5px;letter-spacing:.1em;color:var(--t3)}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--line)}
.drawer-foot .btn-x{width:100%}
body.drawer-open{overflow:hidden}

/* ---------- crumbs ---------- */
.crumbs-wrap{background:#fff;border-bottom:1px solid var(--line)}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;font-size:13.5px;color:var(--t3)}
.crumbs a{color:var(--t3)}
.crumbs a:hover{color:var(--orange)}
.crumbs .sep{color:#C9C3BB}
.crumbs .cur{color:var(--t1);font-weight:600}

/* ---------- category hero ---------- */
.cat-hero{padding:44px 0 8px}
.cat-hero-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:center}
.badge-cat{
  display:inline-flex;align-items:center;gap:7px;background:rgba(15,168,140,.12);color:#0C8C74;
  font-size:12px;font-weight:600;letter-spacing:.06em;padding:5px 12px;border-radius:999px;
}
.badge-cat::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal)}
.cat-hero h1{font-size:44px;margin:14px 0 14px;letter-spacing:-.01em}
.cat-hero h1 i{font-style:normal;color:var(--orange)}
.lead{font-size:16.5px;color:var(--t2);max-width:620px}
.meta-line{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--t3);
}
.meta-line b{font-family:var(--num);color:var(--t1);font-size:15px;margin-left:5px}
.cat-hero-fig{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);position:relative}
.cat-hero-fig img{width:100%;aspect-ratio:4/3;object-fit:cover}
.cat-hero-fig figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:26px 18px 14px;
  background:linear-gradient(to top,rgba(18,23,28,.82),rgba(18,23,28,0));
  color:rgba(255,255,255,.9);font-size:13px;
}

/* ---------- layout ---------- */
.cat-main{padding:56px 0 8px}
.cat-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:44px;align-items:start}
.toc-card{
  position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh);
}
.toc-card h2{font-size:13px;letter-spacing:.12em;color:var(--t3);font-weight:600;margin-bottom:12px}
.toc-list a{
  display:block;position:relative;padding:9px 10px 9px 14px;border-radius:8px;
  color:var(--t2);font-size:14.5px;line-height:1.5;
}
.toc-list a::before{content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:3px;background:transparent;transition:background-color var(--ease)}
.toc-list a:hover{background:var(--paper);color:var(--t1)}
.toc-list a.is-active{color:var(--orange);font-weight:600}
.toc-list a.is-active::before{background:var(--orange)}
.toc-list .t-num{font-family:var(--num);font-size:12.5px;color:var(--t3);margin-right:7px}
.toc-list a.is-active .t-num{color:var(--orange)}
.toc-note{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);font-size:13px;color:var(--t3);line-height:1.7}

/* sections */
.sec-item{padding:0 0 34px;margin-bottom:34px;border-bottom:1px dashed var(--line)}
.sec-item:last-of-type{border-bottom:0;padding-bottom:0;margin-bottom:0}
.sec-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.sec-num{
  width:48px;height:48px;flex:0 0 auto;border-radius:12px;
  background:rgba(15,168,140,.12);color:#0C8C74;
  display:grid;place-items:center;font-family:var(--num);font-size:20px;font-weight:600;
}
.sec-head h2{font-size:26px;letter-spacing:-.01em}
.sec-item p{color:var(--t2)}
.sec-item strong{color:var(--t1)}
.list-check li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--t2)}
.list-check li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;
  background:var(--orange);transform:rotate(45deg);
}
.spec-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:11px 0;border-bottom:1px dashed var(--line);color:var(--t2);font-size:15.5px;
}
.spec-list li:last-child{border-bottom:0}
.spec-list b{font-family:var(--num);color:var(--t1);font-size:15.5px;white-space:nowrap}
.quote-x{
  border-left:3px solid var(--teal);background:var(--paper);border-radius:10px;
  padding:16px 18px;color:var(--t2);font-size:15.5px;margin:0 0 18px;
}
.wide-figure{margin:8px 0 40px;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);background:#fff}
.wide-figure img{width:100%;aspect-ratio:16/7;object-fit:cover}
.wide-figure figcaption{padding:12px 16px;font-size:13px;color:var(--t3);background:#fff}

/* faq */
.faq-sec{padding:66px 0 0}
.sec-title{margin-bottom:26px}
.sec-title span{display:inline-block;font-family:var(--num);font-size:13px;color:var(--orange);letter-spacing:.16em;margin-bottom:10px}
.sec-title h2{font-size:32px}
.sec-title p{margin-top:10px;color:var(--t2);max-width:660px}
.faq-list{max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease)}
.faq-item:hover{border-color:#DAD4CC}
.faq-item.open{box-shadow:var(--sh);border-color:#DAD4CC}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  background:transparent;border:0;padding:18px 20px;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--t1);line-height:1.5;
}
.faq-q .plus{width:24px;height:24px;margin-left:auto;flex:0 0 auto;position:relative}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--t2);border-radius:2px;transition:transform var(--ease),background-color var(--ease)}
.faq-q .plus::before{left:4px;right:4px;top:11px;height:2px}
.faq-q .plus::after{top:4px;bottom:4px;left:11px;width:2px}
.faq-item.open .faq-q .plus::before{background:var(--orange)}
.faq-item.open .faq-q .plus::after{transform:scaleY(0);background:var(--orange)}
.faq-a{display:none;padding:0 20px 20px}
.faq-item.open .faq-a{display:block}
.faq-a p{margin:0;color:var(--t2);line-height:1.8}

/* related */
.rel-sec{padding:66px 0 0}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh);display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover)}
.rel-thumb{overflow:hidden}
.rel-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 300ms ease-out}
.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-body h3{font-size:17.5px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card:hover .rel-body h3{color:var(--orange)}
.rel-body p{margin:0;font-size:14.5px;color:var(--t2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--t3)}
.rel-foot time{font-family:var(--num)}
.rel-foot .arr{font-family:var(--num);color:var(--orange)}

/* cta band */
.cta-band{
  margin-top:80px;background:var(--ink);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background:repeating-linear-gradient(90deg,var(--orange) 0 28px,transparent 28px 56px);
  opacity:.55;
}
.cta-inner{
  position:relative;z-index:2;display:flex;align-items:center;gap:28px;justify-content:space-between;
  padding:52px 0 58px;flex-wrap:wrap;
}
.cta-inner h2{color:#fff;font-size:30px;margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.72);margin:0;max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:44px}
.footer-grid>div+div{border-left:1px solid rgba(255,255,255,.08);padding-left:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand b{color:#fff;font-size:16.5px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin:0 0 16px}
.badge-num{
  display:inline-block;font-family:var(--num);font-size:13px;letter-spacing:.06em;
  color:var(--gold);border:1px solid rgba(255,197,61,.45);border-radius:999px;padding:3px 12px;
}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.08em;margin-bottom:16px;font-weight:600}
.footer-link{
  display:block;color:rgba(255,255,255,.72);font-size:14.5px;padding:6px 0;position:relative;width:fit-content;
}
.footer-link::after{content:"";position:absolute;left:0;right:0;bottom:3px;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.footer-link:hover{color:#fff}
.footer-link:hover::after{transform:scaleX(1)}
.footer-qr{
  width:112px;height:112px;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);display:grid;place-items:center;text-align:center;
  font-size:12.5px;color:rgba(255,255,255,.6);padding:10px;line-height:1.5;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 24px 26px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh);color:var(--t1);
  cursor:pointer;display:grid;place-items:center;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),color var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--orange)}
.to-top::before{content:"";width:9px;height:9px;border-left:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg) translate(1px,1px)}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:1ms !important;animation-duration:1ms !important}
  .rel-card:hover{transform:none}
  .btn-primary-x:hover,.btn-ghost-x:hover{transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .cat-layout{grid-template-columns:224px minmax(0,1fr);gap:32px}
  .cat-hero h1{font-size:38px}
  .mega{width:700px}
}
@media (max-width:991px){
  .nav-main,.search-box{display:none}
  .nav-toggle{display:block}
  .site-header .nav-inner{height:64px;gap:16px}
  .site-header.is-shrink .nav-inner{height:56px}
  .cat-hero{padding:32px 0 0}
  .cat-hero-grid{grid-template-columns:1fr;gap:26px}
  .cat-hero-fig img{aspect-ratio:16/9}
  .cat-main{padding:44px 0 0}
  .cat-layout{grid-template-columns:1fr;gap:28px}
  .toc-card{position:static}
  .toc-list{display:grid;grid-template-columns:1fr 1fr;gap:4px}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-grid>div+div{border-left:0;padding-left:0}
  .cta-inner{padding:44px 0 52px}
}
@media (max-width:767px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .cat-hero h1{font-size:30px}
  .sec-head h2{font-size:22px}
  .sec-num{width:42px;height:42px;font-size:17px;border-radius:10px}
  .sec-title h2{font-size:24px}
  .faq-q{font-size:16px;padding:16px}
  .faq-a{padding:0 16px 18px}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner h2{font-size:23px}
  .cta-inner{padding:38px 0 46px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{padding:18px 16px 24px}
  .wide-figure img{aspect-ratio:16/10}
  .cta-actions{width:100%}
  .cta-actions .btn-x{flex:1 1 auto}
}
@media (max-width:520px){
  .toc-list{grid-template-columns:1fr}
  .cat-hero h1{font-size:28px}
  .meta-line{gap:8px 16px}
  .brand-text em{display:none}
  .mega{display:none}
}

/* roulang page: article */
:root{
  --orange:#FF5A2B;
  --orange-dark:#e64b1f;
  --teal:#0FA88C;
  --teal-soft:rgba(15,168,140,.12);
  --ink:#12171C;
  --ink-2:#1B222A;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DC;
  --t1:#1A1F24;
  --t2:#5A6472;
  --t3:#8A929C;
  --gold:#FFC53D;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(18,23,28,.05),0 10px 28px -14px rgba(18,23,28,.16);
  --sh-h:0 18px 40px -16px rgba(18,23,28,.26);
  --ff:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16.5px;
  line-height:1.8;
  color:var(--t1);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease-out;}
button{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.01em;}
:focus-visible{outline:3px solid rgba(255,90,43,.4);outline-offset:2px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:height .18s ease-out,background .18s ease-out,box-shadow .18s ease-out;
}
.site-header::after{content:"";display:block;height:1px;background:transparent;transition:background .18s ease-out;}
.site-header.shrunk{background:#fff;}
.site-header.shrunk::after{background:var(--line);}
.nav-flex{display:flex;align-items:center;gap:28px;height:76px;transition:height .18s ease-out;}
.site-header.shrunk .nav-flex{height:60px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:var(--ink);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:17px;
  position:relative;overflow:hidden;flex-shrink:0;
}
.brand-mark::after{
  content:"";position:absolute;right:-8px;bottom:-8px;
  width:22px;height:22px;border-radius:50%;
  background:var(--orange);
}
.brand-mark span{position:relative;z-index:1;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;font-weight:700;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--t3);letter-spacing:.04em;}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-item{position:relative;}
.nav-item>a,.nav-item>button{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;border:0;background:none;
  font-size:15.5px;font-weight:500;color:var(--t1);
  border-radius:var(--r-btn);cursor:pointer;position:relative;
  transition:color .18s ease-out,background .18s ease-out;
}
.nav-item>a::after,.nav-item>button::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--orange);border-radius:2px;transform:scaleX(0);
  transition:transform .18s ease-out;
}
.nav-item>a:hover,.nav-item>button:hover{color:var(--orange);}
.nav-item>a:hover::after,.nav-item>button:hover::after{transform:scaleX(1);}
.nav-item.active>a{color:var(--orange);font-weight:600;}
.nav-item.active>a::after{transform:scaleX(1);}
.caret{width:7px;height:7px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .18s ease-out;}
.nav-item.open .caret{transform:rotate(-135deg) translateY(-2px);}
.mega{
  position:absolute;top:calc(100% + 12px);left:50%;transform:translate(-50%,8px);
  width:760px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-h);padding:0;opacity:0;visibility:hidden;
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  overflow:hidden;
}
.mega::before{content:"";display:block;height:3px;background:var(--orange);}
.nav-item.open .mega{opacity:1;visibility:visible;transform:translate(-50%,0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;}
.mega-grid>div{padding:20px 22px;}
.mega-grid>div:first-child{border-right:1px solid var(--line);}
.mega-title{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--t3);margin-bottom:12px;}
.mega-row{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:10px;font-size:14.5px;color:var(--t2);
  transition:background .18s ease-out,color .18s ease-out;
}
.mega-row em{font-style:normal;margin-left:auto;font-size:12.5px;color:var(--t3);font-variant-numeric:tabular-nums;}
.mega-row:hover{background:var(--bg);color:var(--t1);}
.mega-dot{width:20px;height:20px;border-radius:6px;background:var(--teal-soft);position:relative;flex-shrink:0;transition:background .18s ease-out;}
.mega-dot::after{content:"";position:absolute;inset:6px;border-radius:2px;background:var(--teal);transition:background .18s ease-out;}
.mega-row:hover .mega-dot{background:rgba(255,90,43,.14);}
.mega-row:hover .mega-dot::after{background:var(--orange);}
.mega-mini{display:flex;gap:10px;padding:8px;border-radius:10px;transition:background .18s ease-out;}
.mega-mini:hover{background:var(--bg);}
.mega-mini img{width:64px;height:48px;border-radius:8px;object-fit:cover;flex-shrink:0;}
.mega-mini p{font-size:13.5px;line-height:1.5;color:var(--t1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mega-mini time{font-size:12px;color:var(--t3);font-variant-numeric:tabular-nums;}
.mega-cta{margin-top:10px;padding:14px;border-radius:var(--r-card);background:var(--ink);color:#fff;}
.mega-cta p{font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:10px;line-height:1.6;}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-burger span{display:block;width:18px;height:2px;background:var(--t1);position:relative;}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}

/* ============ 按钮 ============ */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  border:1.5px solid transparent;transition:all .18s ease-out;white-space:nowrap;
}
.btn-primary-x{background:var(--orange);color:#fff;box-shadow:0 8px 20px -12px rgba(255,90,43,.9);}
.btn-primary-x:hover{background:var(--orange-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(255,90,43,.95);}
.btn-primary-x:active{transform:translateY(1px);}
.btn-ghost-x{background:#fff;border-color:var(--teal);color:var(--t1);}
.btn-ghost-x:hover{background:var(--bg);color:var(--t1);transform:translateY(-2px);}
.btn-line-x{background:#fff;border-color:var(--line);color:var(--t1);}
.btn-line-x:hover{background:var(--bg);transform:translateY(-2px);}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;}

/* ============ 面包屑 ============ */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--t3);padding-top:26px;}
.crumbs a{color:var(--t3);}
.crumbs a:hover{color:var(--orange);}
.crumbs .sep{color:#C9C3BA;}
.crumbs .current{color:var(--t1);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-hero{padding-bottom:34px;}
.article-tag{
  display:inline-flex;align-items:center;gap:7px;
  margin:26px 0 16px;padding:6px 14px;border-radius:var(--r-pill);
  background:var(--teal-soft);color:var(--teal);font-size:12.5px;font-weight:600;letter-spacing:.03em;
}
.article-title{
  font-size:clamp(28px,3.5vw,42px);
  font-weight:700;line-height:1.28;letter-spacing:-.01em;
  max-width:20ch;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:22px;padding-bottom:24px;
  font-size:13.5px;color:var(--t3);border-bottom:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
.article-meta .dot{color:#C9C3BA;}
.article-meta i{color:var(--teal);margin-right:5px;font-size:12px;}

/* ============ 正文布局 ============ */
.article-section{padding:44px 0 0;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:52px;align-items:start;}
.article-main{min-width:0;}
.article-body{
  max-width:800px;
  font-size:16.5px;line-height:1.9;color:var(--t1);
  word-wrap:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:24px;font-weight:700;line-height:1.35;
  margin:42px 0 16px;padding-left:15px;position:relative;
  scroll-margin-top:100px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  background:var(--orange);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.45;margin:28px 0 12px;scroll-margin-top:100px;}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;}
.article-body img{border-radius:var(--r-img);margin:20px 0;}
.article-body figure{margin:20px 0;}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:8px;line-height:1.6;}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--bg);
  border-left:3px solid var(--teal);border-radius:10px;color:var(--t2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 1.2em;}
.article-body ul{list-style:none;padding-left:22px;}
.article-body ul li{position:relative;margin-bottom:.5em;}
.article-body ul li::before{
  content:"";position:absolute;left:-18px;top:.72em;
  width:6px;height:6px;background:var(--orange);border-radius:2px;
}
.article-body ol li{margin-bottom:.5em;}
.article-body ol li::marker{color:var(--teal);font-weight:700;font-variant-numeric:tabular-nums;}
.article-body a{color:var(--orange);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--orange-dark);}
.article-body strong{font-weight:600;}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:32px 0;}
.article-body .table-scroll{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:10px;}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:420px;}
.article-body th{background:var(--ink);color:#fff;font-weight:600;text-align:left;}
.article-body th,.article-body td{padding:11px 15px;border-bottom:1px solid var(--line);}
.article-body tr:last-child td{border-bottom:0;}
.article-body pre{
  background:var(--ink);color:#E8E8E8;padding:16px 18px;border-radius:10px;
  overflow-x:auto;font-size:13.5px;line-height:1.7;margin:22px 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;}
.article-body :not(pre)>code{background:rgba(15,168,140,.12);color:#0b7a66;padding:2px 6px;border-radius:6px;}

/* ============ 空态 ============ */
.empty-state{
  max-width:800px;padding:56px 24px;text-align:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;
  background:var(--teal-soft);display:flex;align-items:center;justify-content:center;
  color:var(--teal);font-size:26px;
}
.empty-state p{color:var(--t2);margin-bottom:22px;font-size:15.5px;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--sh);
}
.side-card h3{
  font-size:15px;font-weight:700;margin-bottom:14px;
  display:flex;align-items:center;gap:9px;
}
.side-card h3::before{content:"";width:3px;height:15px;background:var(--orange);border-radius:2px;}
.toc{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow-y:auto;}
.toc a{
  display:block;padding:7px 10px;font-size:14px;color:var(--t2);
  border-radius:8px;border-left:3px solid transparent;
  line-height:1.5;transition:all .18s ease-out;
}
.toc a:hover{background:var(--bg);color:var(--t1);}
.toc a.lv3{padding-left:22px;font-size:13.5px;color:var(--t3);}
.toc a.on{color:var(--orange);border-left-color:var(--orange);background:rgba(255,90,43,.06);font-weight:600;}
.toc-empty{font-size:13.5px;color:var(--t3);line-height:1.7;}
.rel-list{display:flex;flex-direction:column;gap:14px;}
.rel-item{display:flex;gap:12px;align-items:flex-start;}
.rel-item img{width:64px;height:48px;border-radius:8px;object-fit:cover;flex-shrink:0;}
.rel-item p{
  font-size:14px;line-height:1.5;color:var(--t1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease-out;
}
.rel-item:hover p{color:var(--orange);}
.rel-item time{font-size:12px;color:var(--t3);font-variant-numeric:tabular-nums;}
.tag-group{display:flex;flex-wrap:wrap;gap:8px;}
.tag-chip{
  display:inline-flex;align-items:center;padding:6px 13px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;font-size:12.5px;color:var(--t2);
  transition:all .18s ease-out;
}
.tag-chip:hover{border-color:var(--teal);color:var(--teal);background:var(--teal-soft);}
.tag-chip.solid{background:var(--teal-soft);border-color:transparent;color:var(--teal);font-weight:600;}

/* ============ 文末区 ============ */
.article-foot{margin-top:48px;max-width:800px;}
.foot-tags{padding-top:26px;border-top:1px solid var(--line);}
.foot-tags .label{font-size:13.5px;color:var(--t3);margin-bottom:12px;}
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;}
.pn-card{
  display:block;padding:18px 20px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);
  transition:all .18s ease-out;min-height:88px;
}
.pn-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:#DAD4CB;}
.pn-card .pn-dir{
  display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--t3);margin-bottom:8px;
}
.pn-card .pn-title{
  font-size:15px;font-weight:600;line-height:1.5;color:var(--t1);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.pn-card:hover .pn-title{color:var(--orange);}
.pn-card.muted{background:transparent;border-style:dashed;display:flex;align-items:center;justify-content:center;}
.pn-card.muted span{font-size:13.5px;color:var(--t3);}
.pn-card.next{text-align:right;}
.pn-card.next .pn-dir{justify-content:flex-end;}

.related-block{margin-top:44px;}
.block-head{display:flex;align-items:baseline;gap:14px;margin-bottom:20px;}
.block-head h2{font-size:22px;font-weight:700;position:relative;padding-left:14px;}
.block-head h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;background:var(--orange);border-radius:2px;}
.block-head span{font-size:13.5px;color:var(--t3);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.r-card{
  display:block;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;transition:all .18s ease-out;
}
.r-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);}
.r-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg);}
.r-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease-out;}
.r-card:hover .thumb img{transform:scale(1.03);}
.r-card .body{padding:18px 20px 20px;}
.r-card .badge-soft{
  display:inline-block;padding:4px 11px;border-radius:var(--r-pill);
  background:var(--teal-soft);color:var(--teal);font-size:12px;font-weight:600;margin-bottom:10px;
}
.r-card h3{
  font-size:15.5px;font-weight:600;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease-out;
}
.r-card:hover h3{color:var(--orange);}
.r-card time{font-size:12.5px;color:var(--t3);font-variant-numeric:tabular-nums;}
.back-row{margin-top:34px;display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;margin-top:88px;background:var(--ink);color:#fff;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;opacity:.28;
}
.cta-band::after{
  content:"";position:absolute;left:-60px;bottom:-60px;width:280px;height:280px;
  border:1.5px dashed rgba(255,90,43,.4);border-radius:50%;pointer-events:none;
}
.cta-inner{position:relative;z-index:1;padding:64px 0;display:flex;align-items:center;gap:36px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;font-weight:700;line-height:1.35;margin-bottom:8px;}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.72);}
.cta-inner .cta-btns{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap;}
.cta-inner .btn-ghost-x{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.cta-inner .btn-ghost-x:hover{background:rgba(255,255,255,.1);color:#fff;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#fff;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:0;}
.footer-grid>div{padding:0 26px;border-right:1px solid rgba(255,255,255,.08);}
.footer-grid>div:first-child{padding-left:0;}
.footer-grid>div:last-child{border-right:0;padding-right:0;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.1);}
.footer-brand b{font-size:16px;font-weight:700;}
.footer-desc{font-size:13.5px;line-height:1.75;color:rgba(255,255,255,.72);margin-bottom:14px;max-width:34ch;}
.badge-num{
  display:inline-block;padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(255,197,61,.14);color:var(--gold);font-size:12.5px;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.site-footer h4{font-size:14px;font-weight:600;margin-bottom:14px;color:#fff;}
.footer-link{
  display:block;font-size:13.5px;color:rgba(255,255,255,.72);
  padding:6px 0;position:relative;width:fit-content;
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:2px;width:0;background:var(--orange);
  transition:width .18s ease-out;
}
.footer-link:hover{color:#fff;}
.footer-link:hover::after{width:100%;}
.footer-qr{
  width:104px;height:104px;border-radius:var(--r-img);
  border:1px solid rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:rgba(255,255,255,.6);padding:10px;line-height:1.5;
  background:rgba(255,255,255,.04);
}
.footer-bottom{
  margin-top:52px;padding:20px 24px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);font-variant-numeric:tabular-nums;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh);
  display:flex;align-items:center;justify-content:center;color:var(--t1);
  opacity:0;visibility:hidden;transition:all .18s ease-out;z-index:900;cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{background:var(--orange);color:#fff;border-color:var(--orange);}

/* ============ 移动抽屉 ============ */
.drawer{
  display:none;position:fixed;inset:76px 0 0 0;background:#fff;z-index:998;
  padding:24px;overflow-y:auto;
}
.drawer.open{display:block;}
.drawer a{
  display:flex;align-items:center;min-height:52px;padding:0 14px;
  font-size:16px;font-weight:500;border-bottom:1px solid var(--line);
  border-left:3px solid transparent;
}
.drawer a.active{color:var(--orange);border-left-color:var(--orange);font-weight:600;}
.drawer .drawer-btn{margin-top:22px;width:100%;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .mega{width:660px;}
}
@media (max-width:991px){
  .nav-main{display:none;}
  .nav-burger{display:inline-flex;}
  .article-layout{grid-template-columns:1fr;gap:36px;}
  .article-side{position:static;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 0;}
  .footer-grid>div{padding:0 22px;border-right:0;}
  .footer-grid>div:nth-child(3){padding-left:0;}
  .footer-grid>div:nth-child(2){border-right:1px solid rgba(255,255,255,.08);}
  .footer-grid>div:nth-child(1),.footer-grid>div:nth-child(3){padding-left:0;}
  .cta-inner .cta-btns{margin-left:0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .wrap{padding:0 16px;}
  .brand-text em{display:none;}
  .article-title{max-width:none;}
  .article-meta{gap:8px;font-size:13px;}
  .pn-grid{grid-template-columns:1fr;}
  .pn-card.next{text-align:left;}
  .pn-card.next .pn-dir{justify-content:flex-start;}
  .related-grid{grid-template-columns:1fr;}
  .cta-inner{padding:48px 0;}
  .cta-inner h2{font-size:22px;}
  .cta-inner .cta-btns{width:100%;}
  .cta-inner .cta-btns .btn-x{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-grid>div{padding:0;}
  .footer-desc{max-width:none;}
  .article-section{padding-top:32px;}
  .article-body h2{font-size:20px;margin-top:32px;}
  .article-body h3{font-size:18px;}
}
@media (max-width:519px){
  .crumbs{padding-top:18px;}
  .article-tag{margin-top:18px;}
  .side-card{padding:18px;}
  .r-card .body{padding:16px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .btn-x:hover,.r-card:hover,.pn-card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --brand:#FF5A2B;
  --brand-d:#E44A1E;
  --teal:#0FA88C;
  --amber:#FFC53D;
  --ink:#12171C;
  --ink2:#1B222A;
  --paper:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DC;
  --text:#1A1F24;
  --muted:#5A6472;
  --weak:#8A929C;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh:0 1px 2px rgba(18,23,28,.05),0 10px 28px -14px rgba(18,23,28,.16);
  --sh-h:0 18px 40px -16px rgba(18,23,28,.26);
  --t:180ms ease-out;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16.5px;
  line-height:1.8;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
:focus-visible{outline:3px solid rgba(255,90,43,.4);outline-offset:2px;border-radius:6px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;width:100%}
@media (min-width:1400px){.wrap{max-width:1320px}}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),color var(--t),border-color var(--t);
}
.btn-primary-x{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(255,90,43,.9)}
.btn-primary-x:hover{background:var(--brand-d);color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(255,90,43,.95)}
.btn-primary-x:active{transform:translateY(0)}
.btn-outline-x{background:#fff;color:var(--text);border-color:var(--teal)}
.btn-outline-x:hover{background:var(--paper);transform:translateY(-2px);border-color:var(--teal)}
.btn-outline-x:active{transform:translateY(0)}
.btn-sm-x{height:40px;padding:0 16px;font-size:14.5px}
.btn-lg-x{height:50px;padding:0 26px;font-size:16px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:background-color var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{background:#fff;box-shadow:0 1px 0 var(--line),0 12px 28px -24px rgba(18,23,28,.5)}
.site-header .wrap{display:flex;align-items:center;gap:20px;height:76px;transition:height var(--t)}
.site-header.is-scrolled .wrap{height:60px}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:800;position:relative;overflow:hidden;flex:0 0 38px;
}
.brand-mark::after{
  content:"";position:absolute;left:-6px;right:-6px;bottom:5px;height:3px;
  background:var(--brand);transform:rotate(-24deg);
}
.brand-mark span{position:relative;z-index:1;line-height:1}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text small{display:block;font-size:12px;font-weight:500;color:var(--weak);letter-spacing:.04em}

.nav-main{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-item{position:relative}
.nav-item > a,.nav-item > button{
  display:inline-flex;align-items:center;gap:7px;
  height:40px;padding:0 14px;background:none;border:0;cursor:pointer;
  font-size:15.5px;font-weight:600;color:var(--text);border-radius:8px;
  transition:color var(--t),background-color var(--t);
}
.nav-item > a::after,.nav-item > button::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-item:hover > a,.nav-item:hover > button,
.nav-item.active > a,.nav-item.active > button{color:var(--brand)}
.nav-item:hover > a::after,.nav-item:hover > button::after,
.nav-item.active > a::after,.nav-item.active > button::after{transform:scaleX(1)}
.caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform var(--t)}
.nav-item.is-open .caret{transform:rotate(-135deg) translateY(-2px)}

.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:44px;height:44px;border-radius:12px;border:1.5px solid var(--line);background:#fff;
  display:grid;place-items:center;cursor:pointer;color:var(--muted);
  transition:border-color var(--t),color var(--t),background-color var(--t);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--paper)}
.icon-btn svg{width:18px;height:18px}

.search-pop{
  position:absolute;top:calc(100% + 6px);right:0;width:330px;max-width:calc(100vw - 32px);
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-h);
  padding:18px;display:none;z-index:1055;
}
.search-pop.is-open{display:block}
.search-pop label{display:block;font-size:13px;color:var(--weak);margin-bottom:8px}
.search-pop .row-inline{display:flex;gap:10px}
.field-x{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;
  font-size:15px;color:var(--text);background:#fff;transition:border-color var(--t),box-shadow var(--t);
}
.field-x:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,43,.2)}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 6px);left:0;
  width:760px;max-width:calc(100vw - 40px);
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-h);
  padding:24px;display:grid;grid-template-columns:1.1fr .9fr;gap:26px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
  z-index:1050;overflow:hidden;
}
.mega::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand)}
.nav-item.is-open .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;color:var(--weak);letter-spacing:.06em;margin-bottom:10px;font-weight:600}
.mega-row{
  display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;
  font-size:15px;color:var(--text);transition:background-color var(--t),color var(--t);
}
.mega-row em{margin-left:auto;font-style:normal;font-size:13px;color:var(--weak);font-variant-numeric:tabular-nums}
.mega-dot{width:20px;height:20px;border-radius:6px;background:rgba(15,168,140,.16);flex:0 0 20px;transition:background-color var(--t)}
.mega-row:hover{background:var(--paper);color:var(--brand)}
.mega-row:hover .mega-dot{background:var(--brand)}
.mega-mini{display:flex;gap:12px;padding:8px;border-radius:10px;transition:background-color var(--t)}
.mega-mini:hover{background:var(--paper)}
.mega-mini img{width:64px;height:48px;object-fit:cover;border-radius:8px;flex:0 0 64px}
.mega-mini p{font-size:14px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mega-mini time{display:block;font-size:12px;color:var(--weak);margin-top:4px}
.mega-cta{margin-top:12px;background:var(--ink);border-radius:12px;padding:16px}
.mega-cta p{color:rgba(255,255,255,.72);font-size:13.5px;margin-bottom:10px;line-height:1.6}

.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1.5px solid var(--line);background:#fff;cursor:pointer;position:relative}
.nav-toggle i,.nav-toggle i::before,.nav-toggle i::after{
  position:absolute;left:12px;width:20px;height:2px;background:var(--text);border-radius:2px;content:"";
}
.nav-toggle i{top:21px}
.nav-toggle i::before{top:-6px;left:0}
.nav-toggle i::after{top:6px;left:0}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;background:#fff;z-index:1080;
  transform:translateX(100%);transition:transform 260ms ease-out;
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1.5px solid var(--line);background:#fff;font-size:20px;color:var(--muted);cursor:pointer;line-height:1}
.drawer-body{padding:14px 20px;overflow-y:auto;flex:1}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:15px 8px;font-size:16.5px;font-weight:600;color:var(--text);background:none;border:0;
  border-bottom:1px solid var(--line);text-align:left;cursor:pointer;
}
.drawer-link.active{color:var(--brand);box-shadow:inset 3px 0 0 var(--brand);padding-left:14px}
.drawer-link i{width:14px;height:14px;position:relative;flex:0 0 14px}
.drawer-link i::before,.drawer-link i::after{content:"";position:absolute;background:var(--weak);border-radius:2px}
.drawer-link i::before{left:0;right:0;top:6px;height:2px}
.drawer-link i::after{top:0;bottom:0;left:6px;width:2px;transition:opacity var(--t)}
.drawer-link.is-open i::after{opacity:0}
.drawer-sub{display:none;padding:6px 0 10px 14px;border-bottom:1px solid var(--line)}
.drawer-sub.is-open{display:block}
.drawer-sub a{display:block;padding:11px 4px;font-size:15px;color:var(--muted)}
.drawer-sub a:hover{color:var(--brand)}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--line);background:#fff}
.drawer-foot .btn-x{width:100%}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--weak)}
.crumb a{color:var(--weak);transition:color var(--t)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C9C4BC}
.crumb .cur{color:var(--text);font-weight:600}

/* ---------- Hero ---------- */
.page-hero{position:relative;background:#fff;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{
  content:"";position:absolute;right:-120px;top:-160px;width:520px;height:520px;border-radius:50%;
  border:44px solid rgba(15,168,140,.06);pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background:repeating-linear-gradient(90deg,rgba(255,90,43,.05) 0 18px,transparent 18px 36px);
  pointer-events:none;
}
.hero-inner{padding:40px 0 66px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;margin-top:26px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:rgba(15,168,140,.12);color:var(--teal);font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero-grid h1{font-size:38px;letter-spacing:-.01em}
.hero-grid .lead{margin-top:16px;font-size:17px;color:var(--muted);max-width:520px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:34px;margin-top:34px;padding-top:26px;border-top:1px dashed var(--line)}
.hero-facts li{display:flex;flex-direction:column;gap:2px}
.fact-num{font-size:28px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.1}
.fact-num em{font-size:15px;font-style:normal;font-weight:600;margin-left:2px;color:var(--brand)}
.fact-label{font-size:13.5px;color:var(--weak)}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;box-shadow:var(--sh)}
.hero-tag{
  position:absolute;left:-18px;bottom:24px;background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--sh);padding:12px 16px;font-size:13.5px;color:var(--muted);display:flex;align-items:center;gap:10px;
}
.hero-tag b{color:var(--brand);font-size:18px;font-variant-numeric:tabular-nums}

/* ---------- 板块通用 ---------- */
.section{padding:84px 0}
.section.tight{padding:58px 0}
.section.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:34px}
.sec-title{position:relative;padding-left:16px;font-size:30px}
.sec-title::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--brand)}
.sec-sub{margin-top:12px;color:var(--muted);font-size:16px}

/* ---------- 筛选标签 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  border:1.5px solid var(--line);background:#fff;color:var(--muted);
  font-size:14px;font-weight:600;transition:all var(--t);
}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(255,90,43,.9)}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-active:hover{color:#fff}

/* ---------- 卡片网格 ---------- */
.data-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.data-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh);
  transition:transform var(--t),box-shadow var(--t);
}
.data-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.card-thumb{overflow:hidden;aspect-ratio:16/9;display:block}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--t)}
.data-card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge-soft{
  display:inline-flex;align-items:center;align-self:flex-start;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(15,168,140,.12);color:var(--teal);font-size:12px;font-weight:600;
}
.data-card h3{font-size:22px;font-weight:600;line-height:1.4}
.data-card h3 a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--t)}
.data-card:hover h3 a{color:var(--brand)}
.data-card .desc{color:var(--muted);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{
  margin-top:auto;padding:14px 24px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--weak);
}
.card-foot .arrow{color:var(--brand);font-weight:700;transition:transform var(--t)}
.data-card:hover .card-foot .arrow{transform:translateX(4px)}
.data-card.featured{grid-column:span 2;flex-direction:row}
.data-card.featured .card-thumb{flex:0 0 46%;aspect-ratio:auto;min-height:260px}
.data-card.featured .card-body{padding:30px}
.data-card.featured h3{font-size:26px}

/* ---------- 规格行 / 提示框 ---------- */
.spec-block{max-width:820px}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  height:52px;border-bottom:1px dashed var(--line);font-size:15.5px;
}
.spec-row:first-child{border-top:1px dashed var(--line)}
.spec-row .k{color:var(--muted)}
.spec-row .v{font-weight:600;font-variant-numeric:tabular-nums;color:var(--text)}
.notice{
  margin-top:26px;background:var(--paper);border-left:3px solid var(--teal);border-radius:10px;
  padding:18px 20px;color:var(--muted);font-size:15px;line-height:1.8;
}
.notice b{color:var(--text)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}

/* ---------- FAQ ---------- */
.faq{max-width:880px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);transition:color var(--t);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;width:24px;height:24px;flex:0 0 24px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.faq-icon::before{left:3px;right:3px;top:11px;height:2px}
.faq-icon::after{top:3px;bottom:3px;left:11px;width:2px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms ease-out}
.faq-a-inner{
  background:var(--paper);border-radius:10px;padding:18px 20px;margin:0 0 20px;
  color:var(--muted);font-size:15.5px;line-height:1.8;
}

/* ---------- 相关推荐 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t);
  display:flex;flex-direction:column;gap:12px;overflow:hidden;
}
.rel-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--teal);opacity:.9}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h)}
.rel-card:hover::before{background:var(--brand)}
.rel-card h3{font-size:18px;font-weight:600;line-height:1.5}
.rel-card .rel-desc{color:var(--muted);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--weak);padding-top:14px;border-top:1px solid var(--line);margin-top:auto}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;color:#fff;overflow:hidden;
  background:var(--ink) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.cta-band::before{content:"";position:absolute;inset:0;background:rgba(18,23,28,.68)}
.cta-band::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.18) 0 26px,transparent 26px 54px);
}
.cta-inner{position:relative;z-index:1;padding:76px 0;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-inner h2{font-size:30px;color:#fff}
.cta-inner p{margin-top:12px;color:rgba(255,255,255,.72);font-size:16px;max-width:620px}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-outline-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-outline-x:hover{background:rgba(255,255,255,.1);border-color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;padding:64px 24px 44px}
.footer-grid > div{padding:0 24px}
.footer-grid > div:first-child{padding-left:0}
.footer-grid > div + div{border-left:1px solid rgba(255,255,255,.08)}
.footer-grid > div:last-child{padding-right:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:#fff;color:var(--ink)}
.footer-brand .brand-mark::after{background:var(--brand)}
.footer-brand b{font-size:17px}
.footer-desc{color:rgba(255,255,255,.72);font-size:14.5px;line-height:1.8;margin-bottom:16px}
.badge-num{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(255,197,61,.16);color:var(--amber);font-size:12.5px;font-weight:600;
  font-variant-numeric:tabular-nums;
}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600}
.footer-link{
  position:relative;display:inline-block;color:rgba(255,255,255,.72);font-size:14.5px;
  padding:5px 0;transition:color var(--t);
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:2px;width:100%;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.footer-link:hover{color:#fff}
.footer-link:hover::after{transform:scaleX(1)}
.footer-qr{
  width:124px;height:124px;border-radius:12px;border:1px solid rgba(255,255,255,.16);
  display:grid;place-items:center;text-align:center;padding:12px;
  color:rgba(255,255,255,.6);font-size:13px;line-height:1.6;
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 24px 26px;border-top:1px solid rgba(255,255,255,.08);
  color:rgba(255,255,255,.55);font-size:13px;
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh);
  display:grid;place-items:center;cursor:pointer;color:var(--text);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),color var(--t);
  z-index:1040;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .data-card.featured{grid-column:span 2}
  .hero-grid{gap:36px}
  .section{padding:72px 0}
}
@media (max-width:991.98px){
  .nav-main,.nav-actions .btn-x{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav-actions{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-visual{order:2}
  .hero-tag{left:12px}
  .split{grid-template-columns:1fr;gap:30px}
  .hero-inner{padding:30px 0 54px}
  .section{padding:60px 0}
  .section.tight{padding:46px 0}
  .cta-inner{padding:60px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 0;padding:48px 24px 32px}
  .footer-grid > div{padding:0 20px}
  .footer-grid > div:nth-child(odd){padding-left:0;border-left:0}
  .footer-grid > div:nth-child(even){border-left:1px solid rgba(255,255,255,.08)}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .hero-grid h1{font-size:30px}
  .sec-title{font-size:24px}
  .data-grid{grid-template-columns:1fr}
  .data-card.featured{grid-column:span 1;flex-direction:column}
  .data-card.featured .card-thumb{flex:1 1 auto;min-height:0;aspect-ratio:16/9}
  .data-card.featured h3{font-size:21px}
  .rel-grid{grid-template-columns:1fr}
  .card-body{padding:20px}
  .card-foot{padding:12px 20px}
  .hero-facts{gap:24px}
  .cta-inner h2{font-size:24px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575.98px){
  .hero-grid h1{font-size:27px}
  .btn-x{width:100%}
  .hero-btns .btn-x{width:100%}
  .cta-btns .btn-x{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-grid > div{border-left:0;padding-left:0}
  .footer-grid > div:nth-child(even){border-left:0}
  .page-hero::before{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:1ms !important;animation-duration:1ms !important}
  .data-card:hover,.rel-card:hover,.btn-x:hover{transform:none}
}

/* roulang page: category3 */
:root{
  --brand:#FF5A2B;
  --brand-d:#e64a1d;
  --teal:#0FA88C;
  --teal-soft:rgba(15,168,140,.12);
  --accent:#FFC53D;
  --ink:#12171C;
  --ink-2:#1B222A;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DC;
  --text:#1A1F24;
  --text-2:#5A6472;
  --text-3:#8A929C;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh-card:0 1px 2px rgba(18,23,28,.05),0 10px 28px -14px rgba(18,23,28,.16);
  --sh-hover:0 18px 40px -16px rgba(18,23,28,.26);
  --num:"Oswald","Barlow Condensed","DIN Alternate",-apple-system,"Segoe UI",sans-serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;color:var(--text);font-weight:700}
h1{font-size:44px}
h2{font-size:32px}
h3{font-size:22px;font-weight:600}
h4{font-size:18px;font-weight:600}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
.num,.count{font-family:var(--num);font-variant-numeric:tabular-nums;letter-spacing:.01em}
:focus-visible{outline:3px solid rgba(255,90,43,.4);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.wrap{max-width:1320px}}
.section{padding:96px 0}
.section-sm{padding:72px 0}
.section-tight{padding:56px 0}
.sec-head{margin-bottom:40px}
.sec-head.center{text-align:center}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--teal);
  letter-spacing:.06em;margin-bottom:12px;
}
.sec-eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--brand)}
.sec-sub{color:var(--text-2);max-width:760px;margin-top:12px;font-size:16.5px}
.center .sec-sub{margin-left:auto;margin-right:auto}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;letter-spacing:.02em;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out,border-color .18s ease-out;
  white-space:nowrap;
}
.btn-primary-x{background:var(--brand);color:#fff;box-shadow:0 8px 20px -10px rgba(255,90,43,.7)}
.btn-primary-x:hover{background:var(--brand-d);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-hover)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:#fff;color:var(--text);border-color:var(--teal)}
.btn-ghost-x:hover{background:var(--bg);color:var(--text);transform:translateY(-2px);box-shadow:var(--sh-card)}
.btn-ghost-x:active{transform:translateY(1px)}
.btn-sm-x{height:40px;padding:0 16px;font-size:15px}
.btn-block-x{width:100%}
.btn-num{font-family:var(--num);font-variant-numeric:tabular-nums}
.btn-x[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge-cat{
  display:inline-block;padding:4px 12px;border-radius:999px;
  background:var(--teal-soft);color:var(--teal);
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.6;
}
.badge-soft{
  display:inline-block;padding:4px 12px;border-radius:999px;
  background:rgba(255,197,61,.18);color:#8a6410;
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge-brand{
  display:inline-block;padding:4px 12px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:12px;font-weight:600;line-height:1.6;
}
.tag-pill{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  border:1.5px solid var(--line);background:#fff;color:var(--text-2);
  font-size:14px;font-weight:500;cursor:default;
}
.tag-pill.is-on{border-color:var(--brand);background:var(--brand);color:#fff;font-weight:600}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:height .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.site-header.is-stuck{background:#fff;border-bottom-color:var(--line);box-shadow:0 6px 24px -18px rgba(18,23,28,.4)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:76px;transition:height .18s ease-out}
.site-header.is-stuck .nav-wrap{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  font-family:var(--num);font-size:19px;font-weight:700;
  position:relative;overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;right:-8px;bottom:-8px;width:22px;height:22px;
  border:2px solid var(--brand);border-radius:50%;opacity:.9;
}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.01em;color:var(--text);white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-item{position:relative}
.nav-item>a,.nav-item>button{
  display:inline-flex;align-items:center;gap:6px;
  height:44px;padding:0 14px;border:0;background:transparent;
  font-size:16px;font-weight:500;color:var(--text-2);cursor:pointer;
  position:relative;border-radius:8px;
}
.nav-item>a::after,.nav-item>button::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;
}
.nav-item>a:hover,.nav-item>button:hover{color:var(--brand)}
.nav-item>a:hover::after,.nav-item>button:hover::after{transform:scaleX(1)}
.nav-item.active>a{color:var(--brand);font-weight:600}
.nav-item.active>a::after{transform:scaleX(1)}
.caret{width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);transition:transform .18s ease-out}
.nav-item.open .caret{transform:rotate(-135deg) translate(-3px,-1px)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;cursor:pointer;color:var(--text-2);transition:all .18s ease-out;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand)}
.icon-btn svg{width:19px;height:19px}
.menu-toggle{display:none}

/* Mega 面板 */
.mega{
  position:absolute;left:50%;top:calc(100% + 12px);transform:translateX(-50%) translateY(6px);
  width:820px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-hover);padding:0;opacity:0;visibility:hidden;
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  overflow:hidden;
}
.mega::before{content:"";display:block;height:3px;background:var(--brand)}
.nav-item.open .mega{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:0}
.mega-grid>div{padding:22px 24px}
.mega-grid>div:first-child{border-right:1px solid var(--line)}
.mega-title{font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--text-3);margin:0 0 12px}
.mega-row{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;
  font-size:15px;color:var(--text-2);transition:background-color .18s ease-out,color .18s ease-out;
}
.mega-row:hover{background:var(--bg);color:var(--text)}
.mega-row em{margin-left:auto;font-style:normal;font-size:12.5px;color:var(--text-3);font-family:var(--num)}
.mega-dot{width:20px;height:20px;border-radius:6px;background:var(--teal-soft);flex-shrink:0;position:relative}
.mega-dot::after{content:"";position:absolute;inset:6px;border-radius:3px;background:var(--teal)}
.mega-row:hover .mega-dot{background:rgba(255,90,43,.14)}
.mega-row:hover .mega-dot::after{background:var(--brand)}
.mega-mini{display:flex;gap:10px;padding:8px;border-radius:10px;transition:background-color .18s ease-out}
.mega-mini:hover{background:var(--bg)}
.mega-mini img{width:64px;height:48px;object-fit:cover;border-radius:8px;flex-shrink:0}
.mega-mini p{margin:0 0 4px;font-size:14px;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mega-mini time{font-size:12.5px;color:var(--text-3);font-family:var(--num)}
.mega-cta{margin-top:14px;background:var(--ink);border-radius:12px;padding:16px}
.mega-cta p{color:rgba(255,255,255,.8);font-size:14px;margin:0 0 12px}

/* 移动抽屉 */
.offcanvas{background:#fff;width:min(88vw,360px)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.offcanvas-body{padding:12px 20px 96px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 12px;border-radius:10px;font-size:16.5px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-link.is-active{color:var(--brand);font-weight:600;box-shadow:inset 3px 0 0 var(--brand)}
.drawer-foot{
  position:absolute;left:0;right:0;bottom:0;padding:16px 20px;background:#fff;
  border-top:1px solid var(--line);
}

/* ---------- Hero（分类页3 通栏） ---------- */
.cat-hero{
  position:relative;min-height:272px;display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  isolation:isolate;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(18,23,28,.86) 0%,rgba(18,23,28,.68) 60%,rgba(18,23,28,.58) 100%);
}
.cat-hero::after{
  content:"";position:absolute;right:6%;top:0;bottom:0;width:2px;
  background:rgba(255,90,43,.35);z-index:-1;
}
.cat-hero .wrap{padding-top:56px;padding-bottom:56px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.66);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.66)}
.crumb a:hover{color:#fff}
.crumb .sep{color:rgba(255,255,255,.35)}
.crumb .cur{color:#fff}
.cat-hero h1{color:#fff;font-size:42px;max-width:820px}
.cat-hero .lead{color:rgba(255,255,255,.78);max-width:800px;margin-top:16px;font-size:16.5px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-meta span{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.82);font-size:13.5px;
}
.hero-meta span b{font-family:var(--num);color:var(--accent);margin-left:6px;font-weight:600}

/* ---------- 下载前准备 ---------- */
.prep-grid{display:grid;grid-template-columns:minmax(0,460px) 1fr;gap:48px;align-items:start}
.prep-media{border-radius:var(--r-card);overflow:hidden;background:#fff;box-shadow:var(--sh-card)}
.prep-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img) var(--r-img) 0 0}
.prep-media figcaption{padding:14px 18px;font-size:13.5px;color:var(--text-3);border-top:1px solid var(--line)}
.prep-list>li{display:flex;gap:16px;padding:20px 0;border-bottom:1px dashed var(--line)}
.prep-list>li:first-child{padding-top:0}
.prep-list>li:last-child{border-bottom:0;padding-bottom:0}
.prep-ico{
  width:44px;height:44px;flex-shrink:0;border-radius:12px;
  background:rgba(15,168,140,.12);color:var(--teal);
  display:grid;place-items:center;font-family:var(--num);font-size:17px;font-weight:700;
}
.prep-list h3{font-size:19px;margin-bottom:6px}
.prep-list p{color:var(--text-2);font-size:15.5px;margin:0}

/* ---------- 时间轴 ---------- */
.tl-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.timeline{position:relative;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:13px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(255,90,43,.16));
}
.tl-item{position:relative;padding-left:64px;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-node{
  position:absolute;left:0;top:2px;width:28px;height:28px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);color:var(--brand);
  display:grid;place-items:center;font-family:var(--num);font-size:12.5px;font-weight:700;
  box-shadow:0 0 0 5px #fff;
}
.tl-body{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;transition:box-shadow .18s ease-out,transform .18s ease-out,background-color .18s ease-out;
}
.tl-body:hover{background:#fff;box-shadow:var(--sh-hover);transform:translateY(-3px)}
.tl-body h3{font-size:20px;margin-bottom:8px}
.tl-body p{color:var(--text-2);font-size:15.5px;margin:0}
.tl-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.tl-meta span{font-size:13px;color:var(--text-3);font-family:var(--num)}
@media (min-width:992px){
  .tl-item:nth-child(even){padding-left:112px}
  .tl-item:nth-child(even) .tl-node{left:0}
}

/* ---------- 常见卡点列表行 ---------- */
.rows{border-top:1px solid var(--line)}
.row-item{
  display:flex;align-items:center;gap:20px;padding:20px 8px;
  border-bottom:1px solid var(--line);transition:background-color .18s ease-out;
}
.row-item:hover{background:#fff}
.row-thumb{width:96px;height:64px;flex-shrink:0;border-radius:var(--r-img);overflow:hidden;background:var(--teal-soft)}
.row-thumb img{width:100%;height:100%;object-fit:cover}
.row-main{min-width:0}
.row-main h3{font-size:17.5px;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.row-main p{margin:0;font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.row-side{margin-left:auto;display:flex;align-items:center;gap:14px;flex-shrink:0}
.row-side time{font-size:13.5px;color:var(--text-3);font-family:var(--num)}
.arrow-dot{
  width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;color:var(--text-2);transition:all .18s ease-out;
}
.row-item:hover .arrow-dot{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateX(4px)}
.arrow-dot svg{width:15px;height:15px}

/* ---------- 规格行 ---------- */
.spec-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px 28px 20px;box-shadow:var(--sh-card)}
.spec-panel h3{margin-bottom:18px;font-size:20px}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:16px;height:48px;border-bottom:1px dashed var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--text-3);font-size:15px;margin:0}
.spec-row dd{margin:0;font-family:var(--num);font-variant-numeric:tabular-nums;font-size:15.5px;color:var(--text);font-weight:600}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.link-more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14.5px;font-weight:600;color:var(--brand)}
.link-more:hover{color:var(--brand-d)}

/* ---------- 备忘（备忘清单式两栏） ---------- */
.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.note-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);border-left:4px solid var(--teal);
}
.note-card h3{font-size:18px;margin-bottom:8px}
.note-card p{color:var(--text-2);font-size:15.5px;margin:0}
.note-card.is-warn{border-left-color:var(--brand)}

/* ---------- FAQ ---------- */
.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:8px 28px;box-shadow:var(--sh-card)}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq .accordion-item:last-child{border-bottom:0}
.faq .accordion-button{
  background:transparent;border:0;box-shadow:none;
  padding:22px 52px 22px 0;font-size:17px;font-weight:600;color:var(--text);
  position:relative;line-height:1.6;
}
.faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq .accordion-button::after{display:none}
.faq-ind{position:absolute;right:6px;top:50%;width:24px;height:24px;transform:translateY(-50%)}
.faq-ind::before,.faq-ind::after{
  content:"";position:absolute;background:var(--text-3);border-radius:2px;transition:all .2s ease-out;
}
.faq-ind::before{left:3px;right:3px;top:11px;height:2px}
.faq-ind::after{top:3px;bottom:3px;left:11px;width:2px}
.faq .accordion-button:not(.collapsed) .faq-ind::before{background:var(--brand)}
.faq .accordion-button:not(.collapsed) .faq-ind::after{transform:scaleY(0);background:var(--brand)}
.faq .accordion-body{padding:0 52px 24px 0;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center 40%;isolation:isolate;
}
.cta-band::before{content:"";position:absolute;inset:0;background:rgba(18,23,28,.86);z-index:-1}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;gap:28px;padding:64px 0}
.cta-inner h2{color:#fff;font-size:30px;max-width:620px}
.cta-inner p{color:rgba(255,255,255,.72);margin:10px 0 0;font-size:15.5px}
.cta-actions{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-ghost-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.cta-band .btn-ghost-x:hover{background:rgba(255,255,255,.1);color:#fff}
.track-line{position:absolute;left:0;right:0;bottom:0;height:6px;background:repeating-linear-gradient(90deg,var(--brand) 0 28px,transparent 28px 56px);opacity:.5}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:28px}
.footer-grid>div{padding-right:20px;border-right:1px solid rgba(255,255,255,.08)}
.footer-grid>div:last-child{border-right:0;padding-right:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand b{color:#fff;font-size:17px}
.footer-brand .brand-mark{background:#fff;color:var(--ink);width:34px;height:34px;font-size:17px;border-radius:10px}
.footer-desc{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.66);margin-bottom:14px}
.badge-num{
  display:inline-block;padding:3px 12px;border-radius:999px;background:var(--accent);color:#3b2a00;
  font-family:var(--num);font-size:13px;font-weight:600;
}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:16px}
.footer-link{display:block;padding:7px 0;font-size:14.5px;color:rgba(255,255,255,.72);position:relative}
.footer-link:hover{color:#fff}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:4px;height:2px;width:0;background:var(--brand);
  transition:width .18s ease-out;
}
.footer-link:hover::after{width:22px}
.footer-qr{
  width:112px;height:112px;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;text-align:center;font-size:13px;color:rgba(255,255,255,.6);
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 6px,transparent 6px 12px);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-card);
  display:grid;place-items:center;cursor:pointer;color:var(--text-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all .2s ease-out;z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--brand);border-color:var(--brand)}
.to-top svg{width:18px;height:18px}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-main{gap:0}
  .nav-item>a,.nav-item>button{padding:0 10px;font-size:15.5px}
  .mega{width:720px}
}
@media (max-width:991px){
  h1{font-size:30px}
  h2{font-size:24px}
  h3{font-size:19px}
  .nav-main,.nav-actions .btn-x,.icon-btn{display:none}
  .menu-toggle{display:grid}
  .nav-wrap{height:64px}
  .site-header.is-stuck .nav-wrap{height:58px}
  .section{padding:72px 0}
  .section-sm{padding:56px 0}
  .prep-grid{grid-template-columns:1fr;gap:32px}
  .spec-grid{grid-template-columns:1fr}
  .note-grid{grid-template-columns:1fr}
  .faq-wrap{padding:4px 20px}
  .faq .accordion-button{padding-right:46px;font-size:16px}
  .faq .accordion-body{padding-right:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid>div{border-right:0;padding-right:0}
  .cta-actions{margin-left:0;width:100%}
  .cat-hero h1{font-size:32px}
  .tl-item:nth-child(even){padding-left:64px}
}
@media (max-width:575px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .section{padding:56px 0}
  .section-sm{padding:48px 0}
  .btn-x{height:46px;width:100%}
  .btn-sm-x{width:auto;height:40px}
  .cat-hero{min-height:240px}
  .cat-hero .wrap{padding-top:44px;padding-bottom:44px}
  .cat-hero .lead{font-size:15px}
  .tl-item{padding-left:52px;padding-bottom:28px}
  .tl-item:nth-child(even){padding-left:52px}
  .tl-body{padding:18px}
  .row-item{gap:14px;align-items:flex-start}
  .row-thumb{width:76px;height:56px}
  .row-side{margin-left:0;width:100%;justify-content:space-between}
  .row-item{flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr}
  .spec-panel{padding:22px 18px 14px}
  .prep-media figcaption{font-size:13px}
  .hero-meta span{font-size:12.5px;padding:0 11px}
}
@media print{
  .site-header,.to-top,.cta-band,.footer-qr{display:none}
  body{background:#fff}
}
@media (prefers-reduced-motion:reduce){
  *{transition:opacity .18s ease-out!important;animation:none!important;transform:none!important}
}