/* roulang page: index */
:root{
  --ink:#0F1110;
  --lime:#C8F135;
  --clay:#D4573A;
  --paper:#F6F4EF;
  --card:#FFFFFF;
  --line:#E3DFD7;
  --muted:#5C615C;
  --r-card:18px;
  --r-img:16px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,17,16,.04);
  --sh-2:0 14px 36px -18px rgba(15,17,16,.22);
  --t:180ms ease-out;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;line-height:1.85;color:var(--ink);background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--ink);text-decoration:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media(min-width:1440px){.container{max-width:1280px;}}
@media(max-width:640px){.container{padding:0 20px;}}

/* ---------- 通用按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:48px;padding:0 26px;
  border-radius:var(--r-pill);font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);white-space:nowrap;}
.btn i{transition:transform var(--t);font-size:13px;}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:var(--ink);color:var(--lime);}
.btn-primary:hover i{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--lime);}
.btn-ghost:hover i{transform:translateX(4px);}
.btn-on-dark{background:var(--lime);color:var(--ink);}
.btn-on-dark:hover{background:#fff;color:var(--ink);}
.btn-text{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;
  border-bottom:2px solid var(--lime);padding-bottom:2px;transition:border-color var(--t),gap var(--t);}
.btn-text:hover{border-bottom-width:3px;gap:12px;}
@media(max-width:640px){.btn{height:52px;width:100%;}}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;line-height:1.6;background:rgba(15,17,16,.07);color:var(--ink);}
.badge-clay{background:rgba(212,87,58,.12);color:var(--clay);}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:70;background:rgba(246,244,239,.94);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;gap:28px;height:74px;}
.brand{display:flex;align-items:center;gap:10px;font-size:17.5px;font-weight:800;letter-spacing:-.01em;flex:0 0 auto;}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-size:14px;font-weight:800;letter-spacing:-.02em;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px;}
.nav-links a{position:relative;display:block;padding:10px 14px;font-size:15px;font-weight:600;
  border-radius:var(--r-pill);transition:color var(--t);}
.nav-links a::after{content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform 200ms ease-out;}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{font-weight:800;}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.mega-wrap{position:relative;}
.mega-trigger{display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 16px;border-radius:var(--r-pill);
  background:transparent;border:1px solid var(--line);font-size:14px;font-weight:700;cursor:pointer;
  transition:border-color var(--t),background var(--t);}
.mega-trigger:hover{border-color:var(--ink);}
.mega-trigger .fa-chevron-down{font-size:11px;transition:transform var(--t);}
.mega-wrap.open .mega-trigger .fa-chevron-down{transform:rotate(180deg);}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:760px;max-width:min(760px,86vw);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);
  padding:26px;display:grid;grid-template-columns:1fr 1.15fr;gap:26px;
  opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity 200ms ease-out,transform 200ms ease-out,visibility 200ms;}
.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{font-size:13px;font-weight:800;color:var(--muted);letter-spacing:.04em;margin-bottom:14px;}
.mega-col ul{display:grid;gap:10px;}
.mega-col ul a{display:flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--ink);
  transition:color var(--t),gap var(--t);}
.mega-col ul a:hover{color:var(--clay);gap:12px;}
.mega-mini{display:flex;gap:12px;align-items:flex-start;padding:10px;border:1px solid var(--line);
  border-radius:14px;transition:border-color var(--t),transform var(--t);}
.mega-mini:hover{border-color:var(--ink);transform:translateY(-3px);}
.mega-mini img{width:74px;height:56px;object-fit:cover;border-radius:10px;background:#E3DFD7;flex:0 0 auto;}
.mega-mini span{display:block;font-size:13.5px;font-weight:700;line-height:1.5;}
.mega-mini em{display:block;font-style:normal;font-size:12px;color:var(--muted);margin-top:6px;}
.nav-burger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--card);cursor:pointer;align-items:center;justify-content:center;font-size:16px;}
@media(max-width:1024px){
  .nav-links,.mega-wrap,.nav-right .btn{display:none;}
  .nav-burger{display:inline-flex;}
  .nav-inner{height:66px;gap:16px;}
}
.drawer{position:fixed;inset:0;z-index:90;background:rgba(15,17,16,.4);opacity:0;visibility:hidden;
  transition:opacity 200ms ease-out,visibility 200ms;}
.drawer.open{opacity:1;visibility:visible;}
.drawer-panel{position:absolute;top:0;right:0;height:100%;width:min(340px,88vw);background:var(--paper);
  padding:22px;display:flex;flex-direction:column;transform:translateX(100%);transition:transform 240ms ease-out;overflow-y:auto;}
.drawer.open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--card);
  cursor:pointer;display:grid;place-items:center;}
.drawer-nav{display:grid;gap:6px;margin-bottom:24px;}
.drawer-nav a{display:block;padding:14px 16px;border-radius:14px;background:var(--card);
  border:1px solid var(--line);font-weight:700;font-size:15px;}
.drawer-nav a.active{border-color:var(--ink);box-shadow:inset 3px 0 0 var(--lime);}
.drawer-foot{margin-top:auto;padding-top:20px;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 88px;position:relative;}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;color:var(--muted);
  letter-spacing:.04em;margin-bottom:18px;}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--lime);}
.hero h1{font-size:clamp(2rem,4.4vw,3.25rem);line-height:1.15;font-weight:800;letter-spacing:-.02em;margin-bottom:20px;}
.hero h1 .hl{background:linear-gradient(transparent 62%,var(--lime) 62%);padding:0 2px;}
.hero-sub{font-size:18px;color:var(--muted);max-width:26em;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-trust{display:flex;flex-wrap:wrap;align-items:center;gap:0;font-size:14px;color:var(--muted);font-weight:600;}
.hero-trust span{padding:0 16px;border-left:1px solid var(--line);}
.hero-trust span:first-child{padding-left:0;border-left:none;}
.hero-media{position:relative;}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:#E3DFD7;
  box-shadow:var(--sh-2);}
.hero-chip{position:absolute;left:-14px;bottom:26px;display:inline-flex;align-items:center;gap:8px;
  background:var(--lime);color:var(--ink);font-size:13.5px;font-weight:800;padding:10px 18px;border-radius:var(--r-pill);
  box-shadow:var(--sh-2);}
@media(max-width:1024px){
  .hero{padding:48px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-sub{max-width:none;}
}
@media(max-width:640px){
  .hero-trust span{padding:0 12px;font-size:13px;}
  .hero-chip{left:12px;bottom:12px;}
}

/* ---------- 反色价值带 ---------- */
.dark-band{background:var(--ink);color:#fff;padding:80px 0;}
.dark-band h2{color:#fff;}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.band-item{padding:0 30px;border-left:1px solid rgba(255,255,255,.14);}
.band-item:first-child{border-left:none;padding-left:0;}
.band-num{display:block;font-size:34px;font-weight:800;color:var(--lime);line-height:1;margin-bottom:16px;letter-spacing:-.03em;}
.band-item h3{font-size:17px;font-weight:800;color:#fff;margin-bottom:8px;}
.band-item p{font-size:14.5px;line-height:1.75;color:#A8ADA6;margin:0;}
@media(max-width:1024px){
  .dark-band{padding:64px 0;}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:36px 0;}
  .band-item:nth-child(3){border-left:none;padding-left:0;}
}
@media(max-width:640px){
  .dark-band{padding:52px 0;}
  .band-grid{grid-template-columns:1fr;gap:0;}
  .band-item{border-left:none;border-top:1px solid rgba(255,255,255,.14);padding:24px 0 0;margin-bottom:24px;}
  .band-item:first-child{border-top:none;padding-top:0;}
  .band-num{font-size:28px;}
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-alt{background:#FFFFFF;}
.section-head{margin-bottom:52px;max-width:760px;}
.section-head h2{position:relative;font-size:clamp(1.5rem,2.6vw,2.125rem);line-height:1.25;font-weight:800;
  letter-spacing:-.02em;padding-top:20px;}
.section-head h2::before{content:"";position:absolute;top:0;left:0;width:12px;height:2px;background:var(--lime);}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;max-width:38em;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
@media(max-width:1024px){.section{padding:72px 0;}.section-head{margin-bottom:38px;}}
@media(max-width:640px){.section{padding:56px 0;}}

/* ---------- 功能族 ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:44px 0;
  border-top:1px solid var(--line);}
.feature-row:first-of-type{border-top:none;padding-top:0;}
.feature-row.reverse .feature-media{order:2;}
.feature-row.reverse .feature-copy{order:1;}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);background:#E3DFD7;}
.feature-copy h3{font-size:clamp(1.25rem,2vw,1.6rem);font-weight:800;line-height:1.3;margin-bottom:14px;}
.feature-copy > p{color:var(--muted);font-size:15.5px;max-width:34em;}
.point-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 22px;margin-top:24px;}
.point-list li{display:flex;gap:10px;font-size:15px;font-weight:600;line-height:1.7;}
.point-list li i{color:var(--ink);background:var(--lime);width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;font-size:10px;flex:0 0 auto;margin-top:5px;}
@media(max-width:1024px){
  .feature-row{grid-template-columns:1fr;gap:28px;padding:36px 0;}
  .feature-row.reverse .feature-media{order:0;}
  .feature-row.reverse .feature-copy{order:1;}
  .point-list{grid-template-columns:1fr;}
}

/* ---------- 使用场景 ---------- */
.tag-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--card);font-size:14px;font-weight:600;transition:border-color var(--t),background var(--t);}
.tag:hover{border-color:var(--ink);background:#fff;}
.scene-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px;}
.scene-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);display:flex;flex-direction:column;}
.scene-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#E3DFD7;}
.scene-card .scene-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.scene-card h3{font-size:18px;font-weight:800;}
.scene-card p{font-size:14.5px;color:var(--muted);margin:0;}
.scene-card ul{display:grid;gap:8px;margin-top:auto;padding-top:8px;}
.scene-card ul li{font-size:14px;font-weight:600;display:flex;gap:8px;align-items:flex-start;}
.scene-card ul li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--lime);margin-top:8px;flex:0 0 auto;}
.scene-card.wide{grid-row:span 1;}
@media(max-width:1024px){.scene-grid{grid-template-columns:1fr 1fr;}.scene-card.wide{grid-column:span 2;}}
@media(max-width:640px){.scene-grid{grid-template-columns:1fr;}.scene-card.wide{grid-column:span 1;}}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;}
.case-main{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:box-shadow var(--t),border-color var(--t);}
.case-main:hover{border-color:var(--ink);box-shadow:var(--sh-2);}
.case-main img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#E3DFD7;}
.case-main .case-body{padding:30px;}
.case-main h3{font-size:20px;font-weight:800;margin-bottom:12px;}
.case-main blockquote{margin:0 0 20px;padding-left:16px;border-left:3px solid var(--lime);
  font-size:15.5px;color:var(--muted);font-style:normal;}
.case-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-top:20px;border-top:1px solid var(--line);}
.case-stats strong{display:block;font-size:26px;font-weight:800;line-height:1.2;letter-spacing:-.02em;}
.case-stats span{font-size:13px;color:var(--muted);}
.case-side{display:grid;gap:24px;align-content:start;}
.case-mini{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);box-shadow:var(--sh-1);}
.case-mini:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.case-mini h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
.case-mini p{font-size:14px;color:var(--muted);margin:0 0 14px;}
.case-mini .btn-text{font-size:14px;}
@media(max-width:1024px){.case-grid{grid-template-columns:1fr;}.case-side{grid-template-columns:1fr 1fr;}}
@media(max-width:640px){.case-side{grid-template-columns:1fr;}.case-stats{grid-template-columns:1fr 1fr;gap:12px;}}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:32px 28px;
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);display:flex;flex-direction:column;}
.price-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.price-card h3{font-size:18px;font-weight:800;margin-bottom:6px;}
.price-card .price-desc{font-size:14px;color:var(--muted);margin-bottom:20px;}
.price-amount{font-size:40px;font-weight:800;letter-spacing:-.03em;line-height:1;margin-bottom:6px;}
.price-amount em{font-style:normal;font-size:15px;font-weight:600;color:var(--muted);margin-left:6px;letter-spacing:0;}
.price-note{font-size:13px;color:var(--muted);margin-bottom:24px;}
.price-list{display:grid;gap:12px;padding:22px 0;border-top:1px solid var(--line);margin-bottom:24px;flex:1;}
.price-list li{display:flex;gap:10px;font-size:14.5px;align-items:flex-start;line-height:1.65;}
.price-list li i{width:18px;flex:0 0 auto;margin-top:5px;font-size:12px;text-align:center;}
.price-list li .yes{color:var(--ink);}
.price-list li .no{color:#B9BDB6;}
.price-list li.off{color:#A8ADA6;}
.price-card.featured{background:var(--ink);border-color:var(--lime);color:#fff;position:relative;padding-top:44px;}
.price-card.featured h3,.price-card.featured .price-amount{color:#fff;}
.price-card.featured .price-desc,.price-card.featured .price-note{color:#A8ADA6;}
.price-card.featured .price-list{border-top-color:rgba(255,255,255,.16);}
.price-card.featured .price-list li{color:#E8EAE5;}
.price-card.featured .price-list li.off{color:#7C827A;}
.price-flag{position:absolute;top:16px;right:20px;background:var(--lime);color:var(--ink);
  font-size:12px;font-weight:800;padding:4px 12px;border-radius:var(--r-pill);}
.price-foot{margin-top:34px;text-align:center;}
@media(max-width:1024px){.price-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto;}}

/* ---------- 最新信息 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);display:flex;flex-direction:column;}
.post-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.post-card .card-media{display:block;}
.post-card .card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#E3DFD7;transition:transform 400ms ease-out;}
.post-card:hover .card-media img{transform:scale(1.03);}
.post-card .card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-card h3{font-size:17px;font-weight:800;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card h3 a:hover{color:var(--clay);}
.post-card .card-summary{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:auto;
  padding-top:14px;border-top:1px solid var(--line);}
.card-meta i{font-size:12px;}
.empty-state{grid-column:1/-1;text-align:center;padding:64px 24px;background:var(--card);border:1px dashed var(--line);
  border-radius:var(--r-card);}
.empty-state i{font-size:26px;color:#B9BDB6;display:block;margin-bottom:14px;}
.empty-state p{color:var(--muted);margin-bottom:18px;}
@media(max-width:1024px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:640px){.post-grid{grid-template-columns:1fr;}}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-head{text-align:center;margin-bottom:40px;}
.faq-head h2{font-size:clamp(1.5rem,2.6vw,2.125rem);font-weight:800;}
.faq-head p{color:var(--muted);margin-top:12px;}
.accordion{border:none;background:transparent;margin:0;}
.accordion .accordion-item{border:none;border-top:1px solid var(--line);}
.accordion .accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion .accordion-title{background:transparent;border:none;padding:24px 48px 24px 0;font-size:17px;font-weight:700;
  color:var(--ink);line-height:1.6;position:relative;transition:color var(--t);}
.accordion .accordion-title:hover{color:var(--clay);}
.accordion .accordion-title::before{content:"+";position:absolute;right:8px;left:auto;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--ink);transition:transform 220ms ease-out,color var(--t);}
.accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);color:var(--ink);}
.accordion .accordion-title::after{display:none;}
.accordion .accordion-item.is-active .accordion-title{padding-left:18px;font-weight:800;}
.accordion .accordion-item.is-active .accordion-title::first-line{}
.accordion .accordion-item .accordion-title{box-shadow:none;}
.accordion .accordion-item.is-active{box-shadow:inset 3px 0 0 var(--lime);}
.accordion .accordion-content{border:none;background:transparent;padding:0 60px 24px 18px;color:var(--muted);
  font-size:15.5px;line-height:1.85;}
.faq-foot{text-align:center;margin-top:34px;color:var(--muted);font-size:15px;}
.faq-foot a{font-weight:700;border-bottom:2px solid var(--lime);}

/* ---------- 结尾 CTA ---------- */
.cta-band{background:var(--ink);padding:80px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-inner h2{color:#fff;font-size:clamp(1.5rem,2.6vw,2.125rem);font-weight:800;line-height:1.25;max-width:20em;}
.cta-inner p{color:#A8ADA6;margin:12px 0 0;font-size:15.5px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
@media(max-width:640px){.cta-band{padding:56px 0;}.cta-inner{flex-direction:column;align-items:stretch;}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#A8ADA6;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.5fr;gap:40px;padding-bottom:52px;}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--lime);color:var(--ink);}
.footer-brand p{font-size:14px;line-height:1.85;color:#A8ADA6;max-width:26em;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{width:38px;height:38px;border-radius:12px;border:1px solid rgba(255,255,255,.16);
  display:grid;place-items:center;color:#A8ADA6;transition:border-color var(--t),color var(--t),background var(--t);}
.footer-social a:hover{border-color:var(--lime);color:var(--lime);background:rgba(200,241,53,.08);}
.site-footer h4{font-size:13.5px;font-weight:800;color:#fff;letter-spacing:.03em;margin-bottom:18px;}
.footer-links{display:grid;gap:12px;}
.footer-links a{color:#A8ADA6;font-size:14.5px;transition:color var(--t);border-bottom:2px solid transparent;display:inline-block;}
.footer-links a:hover{color:#fff;border-bottom-color:var(--lime);}
.footer-sub-form{display:flex;gap:10px;margin-top:16px;}
.footer-sub-form input{flex:1;height:46px;padding:0 16px;border-radius:var(--r-input);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;font-size:14.5px;transition:border-color var(--t),background var(--t);}
.footer-sub-form input::placeholder{color:#7C827A;}
.footer-sub-form input:focus{outline:none;border-color:var(--lime);background:rgba(255,255,255,.1);}
.footer-sub-form .btn{height:46px;padding:0 20px;font-size:14px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13.5px;color:#7C827A;}
.footer-bottom a{color:#7C827A;}
.footer-bottom a:hover{color:#fff;}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media(max-width:640px){
  .site-footer{padding:52px 0 0;}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:38px;}
  .footer-sub-form{flex-direction:column;}
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 500ms cubic-bezier(.16,1,.3,1),transform 500ms cubic-bezier(.16,1,.3,1);}
.reveal.is-visible{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#0F1110;
  --ink-soft:#1F221E;
  --lime:#C8F135;
  --lime-deep:#A8CE22;
  --clay:#D4573A;
  --paper:#F6F4EF;
  --white:#FFFFFF;
  --line:#E3DFD7;
  --muted:#5C615C;
  --r-card:18px;
  --r-img:16px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,17,16,.04);
  --sh-2:0 14px 36px -18px rgba(15,17,16,.22);
  --ease:180ms ease-out;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-0.01em;}
p{margin:0 0 1.2em;}
ul,ol{margin:0 0 1.2em;padding-left:22px;}
li{margin-bottom:8px;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  :root{--container:1280px;}
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.btn i{font-size:13px;transition:transform var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn-primary:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--lime);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.link-underline{
  color:var(--ink);
  font-weight:600;
  border-bottom:2px solid var(--lime);
  padding-bottom:2px;
}
.link-underline:hover{border-bottom-width:3px;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:700;
  line-height:1.4;
  background:rgba(15,17,16,.07);
  color:var(--ink);
}
.badge-clay{background:rgba(212,87,58,.12);color:#8E3620;}
.badge-lime{background:var(--lime);color:var(--ink);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,244,239,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background:var(--ink);
  color:var(--lime);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:800;
  letter-spacing:0;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:12px;
}
.nav-links a{
  position:relative;
  padding:10px 14px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  color:#3C413C;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms ease-out;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink);font-weight:700;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}

/* ---------- Mega Menu ---------- */
.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:44px;
  padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--white);
  color:var(--ink);
  font-size:14.5px;
  font-weight:600;
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease),color var(--ease);
}
.mega-trigger:hover{border-color:var(--ink);}
.mega-trigger[aria-expanded="true"]{background:var(--ink);color:var(--lime);border-color:var(--ink);}
.mega-trigger .fa-chevron-down{font-size:11px;transition:transform var(--ease);}
.mega-trigger[aria-expanded="true"] .fa-chevron-down{transform:rotate(180deg);}
.mega-panel{
  position:absolute;
  right:0;
  top:calc(100% + 12px);
  width:700px;
  max-width:calc(100vw - 48px);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  padding:24px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity 200ms ease-out,transform 200ms ease-out,visibility 200ms;
}
.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{
  font-size:13px;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--muted);
  margin-bottom:12px;
}
.mega-col ul{list-style:none;margin:0;padding:0;}
.mega-col ul li{margin:0 0 2px;}
.mega-col ul a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 10px;
  border-radius:var(--r-input);
  font-size:14.5px;
  color:var(--ink-soft);
}
.mega-col ul a i{color:var(--lime-deep);font-size:11px;}
.mega-col ul a:hover{background:var(--paper);color:var(--ink);}
.mega-mini{
  display:flex;
  gap:12px;
  align-items:center;
  padding:10px;
  border:1px solid var(--line);
  border-radius:14px;
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.mega-mini:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-1);}
.mega-mini img{
  width:74px;
  height:52px;
  object-fit:cover;
  border-radius:10px;
  background:#E3DFD7;
  flex:0 0 auto;
}
.mega-mini span{font-size:14px;font-weight:700;color:var(--ink);line-height:1.5;}
.mega-mini em{display:block;font-style:normal;font-size:12.5px;font-weight:500;color:var(--muted);}
.nav-burger{
  display:none;
  width:44px;
  height:44px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--white);
  color:var(--ink);
  font-size:16px;
  cursor:pointer;
}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:28px 0 0;}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
  flex-wrap:nowrap;
  overflow:hidden;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--ink);border-bottom:2px solid var(--lime);}
.crumb .sep{color:#B8BCB5;}
.crumb .current{
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:52vw;
}

/* ---------- 文章头部 ---------- */
.article-head{padding:24px 0 40px;}
.article-head h1{
  font-size:clamp(1.8rem,3.4vw,2.6rem);
  line-height:1.24;
  font-weight:800;
  letter-spacing:-0.02em;
  max-width:900px;
  margin-bottom:18px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 16px;
  font-size:14px;
  color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C4C8C1;}
.meta-actions{margin-left:auto;display:flex;gap:8px;}
.icon-btn{
  width:40px;
  height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--white);
  color:var(--muted);
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease);
}
.icon-btn:hover{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.article-cover{
  margin-top:28px;
  border-radius:var(--r-img);
  overflow:hidden;
  background:#E3DFD7;
}
.article-cover img{
  width:100%;
  height:clamp(220px,42vw,420px);
  object-fit:cover;
}

/* ---------- 布局 ---------- */
.article-layout{align-items:flex-start;}
.article-main{padding-bottom:24px;}
.article-body{
  max-width:760px;
  font-size:17.5px;
  line-height:1.9;
  color:#25281F;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:clamp(1.3rem,2.2vw,1.55rem);
  font-weight:800;
  line-height:1.35;
  margin:44px 0 16px;
  padding-left:16px;
  border-left:3px solid var(--lime);
  scroll-margin-top:110px;
}
.article-body h3{
  font-size:1.18rem;
  font-weight:700;
  margin:30px 0 12px;
  color:var(--ink);
  scroll-margin-top:110px;
}
.article-body h4{font-size:1.02rem;font-weight:700;margin:22px 0 10px;}
.article-body p{margin:0 0 1.5em;}
.article-body a{color:var(--ink);border-bottom:2px solid var(--lime);}
.article-body a:hover{border-bottom-width:3px;}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.5em;}
.article-body ul li::marker{color:var(--lime-deep);font-size:1.1em;}
.article-body ol li::marker{color:var(--ink);font-weight:700;}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  background:var(--paper);
  border-left:3px solid var(--lime);
  border-radius:0 14px 14px 0;
  color:var(--muted);
  font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;
  height:auto;
  border-radius:var(--r-img);
  margin:26px 0 10px;
  background:#E3DFD7;
}
.article-body figcaption{
  font-size:13px;
  color:var(--muted);
  text-align:center;
  margin-bottom:26px;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:26px 0;
  font-size:15.5px;
  border-top:2px solid var(--ink);
}
.article-body th{
  text-align:left;
  font-weight:700;
  color:var(--ink);
  padding:12px 14px;
  border-bottom:1px solid var(--line);
}
.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
}
.article-body tbody tr:nth-child(even){background:#FAF9F6;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* ---------- 侧栏 ---------- */
.article-side{
  position:sticky;
  top:100px;
  margin-top:8px;
}
.side-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
}
.toc-details summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
}
.toc-details summary::-webkit-details-marker{display:none;}
.toc-details summary i{color:var(--muted);font-size:12px;}
.toc-list{margin-top:14px;}
.toc-list a{
  display:block;
  padding:8px 0 8px 12px;
  border-left:2px solid var(--line);
  font-size:14px;
  line-height:1.6;
  color:var(--muted);
}
.toc-list a:hover{color:var(--ink);border-left-color:var(--lime);}
.side-back{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:14px;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  border-bottom:2px solid var(--lime);
  padding-bottom:2px;
}
.side-box{display:none;}
.side-card.is-empty .toc-list,
.side-card.is-empty .toc-title{display:none;}
.side-card.is-empty .side-box{display:block;}

/* ---------- 标签与继续阅读 ---------- */
.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:44px 0 0;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag-row .label{font-size:14px;color:var(--muted);margin-right:4px;}
.tag{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:rgba(15,17,16,.06);
  color:var(--ink);
  font-size:13px;
  font-weight:600;
}
.tag:hover{background:var(--lime);}
.next-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px;max-width:760px;}
.next-card{
  display:block;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.next-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.next-card span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:8px;letter-spacing:.04em;}
.next-card strong{display:block;font-size:16px;font-weight:700;color:var(--ink);line-height:1.5;margin-bottom:8px;}
.next-card em{font-style:normal;font-size:13.5px;color:var(--muted);}
.next-card i{color:var(--lime-deep);margin-right:6px;}

/* ---------- 空状态 ---------- */
.empty-state{
  max-width:760px;
  background:var(--white);
  border:1px dashed var(--line);
  border-radius:var(--r-card);
  padding:56px 32px;
  text-align:center;
}
.empty-state i{font-size:30px;color:var(--lime-deep);}
.empty-state h2{font-size:1.3rem;font-weight:800;margin:16px 0 8px;}
.empty-state p{color:var(--muted);font-size:15.5px;margin-bottom:22px;}

/* ---------- 相关推荐 ---------- */
.related-block{padding-top:8px;}
.related-block h2{
  font-size:clamp(1.4rem,2.4vw,1.85rem);
  font-weight:800;
  margin-bottom:8px;
}
.related-block .sub{font-size:14.5px;color:var(--muted);margin-bottom:28px;}
.post-card{
  display:block;
  height:100%;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.post-card h3{font-size:16px;font-weight:700;line-height:1.55;margin:10px 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card .card-meta{font-size:13px;color:var(--muted);display:flex;gap:10px;align-items:center;}

/* ---------- 结尾 CTA ---------- */
.cta-band{
  background:var(--ink);
  border-radius:24px;
  padding:56px 48px;
  color:#D9DCD6;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{
  color:#fff;
  font-size:clamp(1.4rem,2.6vw,2rem);
  font-weight:800;
  line-height:1.3;
  margin-bottom:12px;
}
.cta-band p{color:#A8ADA6;margin:0;font-size:15.5px;max-width:520px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:#A8ADA6;
  padding:72px 0 32px;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:40px 32px;
}
.footer-brand .brand{color:#fff;}
.site-footer h4{
  color:#fff;
  font-size:14px;
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-brand p{font-size:14px;color:#A8ADA6;margin:16px 0 18px;max-width:320px;line-height:1.8;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#A8ADA6;display:inline-block;}
.footer-links a:hover{color:#fff;border-bottom:2px solid var(--lime);}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:38px;
  height:38px;
  border-radius:var(--r-pill);
  border:1px solid #2C302B;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:#A8ADA6;
  font-size:14px;
}
.footer-social a:hover{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.footer-sub-form{display:flex;gap:10px;margin-top:14px;}
.footer-sub-form input{
  flex:1;
  min-width:0;
  height:46px;
  padding:0 16px;
  border-radius:var(--r-input);
  border:1px solid #2F342E;
  background:#171A16;
  color:#fff;
  font-size:14px;
}
.footer-sub-form input::placeholder{color:#7C817B;}
.footer-sub-form input:focus{outline:none;border-color:var(--lime);box-shadow:inset 0 0 0 1px var(--lime);}
.footer-bottom{
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid #24281F;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8B908A;
}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 500ms cubic-bezier(.16,1,.3,1),transform 500ms cubic-bezier(.16,1,.3,1);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0;}
  .nav-burger{display:inline-flex;align-items:center;justify-content:center;}
  .nav-links{
    display:none;
    position:absolute;
    top:76px;
    left:0;
    right:0;
    margin:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:16px 20px 22px;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    box-shadow:var(--sh-2);
  }
  .nav-links a{padding:14px 12px;border-radius:12px;font-size:16px;}
  .nav-links a::after{display:none;}
  .nav-links a.active{background:rgba(200,241,53,.35);}
  body.nav-open .nav-links{display:flex;}
  .nav-right .btn-primary{display:none;}
  .mega-panel{
    position:static;
    width:100%;
    max-width:none;
    grid-template-columns:1fr;
    margin-top:10px;
    box-shadow:none;
    opacity:1;
    visibility:visible;
    transform:none;
    display:none;
  }
  .mega-wrap.is-open .mega-panel{display:grid;}
  .article-side{position:static;margin-top:36px;}
  .side-card{padding:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{padding:44px 32px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .article-body{font-size:16.5px;line-height:1.9;}
  .next-grid{grid-template-columns:1fr;}
  .article-head h1{font-size:1.7rem;}
  .crumb .current{max-width:60vw;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .cta-band{padding:36px 24px;border-radius:20px;}
  .cta-band .btn{width:100%;}
}
@media (max-width:520px){
  .brand span:last-child{font-size:15.5px;}
  .article-head h1{font-size:1.5rem;}
  .meta-actions{margin-left:0;width:100%;}
  .side-card{padding:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink:#0F1110;
  --lime:#C8F135;
  --clay:#D4573A;
  --paper:#F6F4EF;
  --card:#FFFFFF;
  --line:#E3DFD7;
  --muted:#5C615C;
  --radius-card:18px;
  --radius-img:16px;
  --radius-input:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(15,17,16,.04);
  --shadow-2:0 14px 36px -18px rgba(15,17,16,.22);
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:96px;
  --t:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color var(--t),border-color var(--t);}
a:hover{color:var(--ink);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){.container{max-width:1280px;}}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em;}
h1{font-size:clamp(2rem,4.4vw,3.25rem);font-weight:800;line-height:1.15;letter-spacing:-0.02em;}
h2{font-size:clamp(1.5rem,2.6vw,2.125rem);font-weight:800;}
h3{font-size:1.25rem;font-weight:700;}
p{margin:0;}
.tick{position:relative;padding-top:18px;}
.tick::before{content:"";position:absolute;top:0;left:0;width:12px;height:2px;background:var(--lime);}
.lead{font-size:17px;color:var(--muted);line-height:1.85;max-width:40ch;}
.muted{color:var(--muted);}
.num{font-variant-numeric:tabular-nums;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15.5px;font-weight:700;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn i{transition:transform var(--t);}
.btn:hover i{transform:translateX(4px);}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn-primary:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--lime);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-ghost-light:hover{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;
  border-bottom:2px solid var(--lime);padding-bottom:2px;transition:border-width var(--t),border-color var(--t);
}
.text-link:hover{border-bottom-width:3px;}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:700;letter-spacing:.02em;
  background:rgba(15,17,16,.06);color:var(--ink);
}
.badge-clay{background:rgba(212,87,58,.12);color:var(--clay);}
.badge-lime{background:var(--lime);color:var(--ink);}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-0.01em;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--ink);color:var(--lime);
  font-size:13px;font-weight:800;letter-spacing:0;
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px;}
.nav-links a{
  position:relative;padding:10px 14px;font-size:15.5px;font-weight:600;border-radius:var(--radius-pill);
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform 200ms ease-out;
}
.nav-links a:hover::after,.nav-links a:focus-visible::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}

/* Mega 面板 */
.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 18px;border-radius:var(--radius-pill);
  background:transparent;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;cursor:pointer;transition:border-color var(--t),background var(--t);
}
.mega-trigger:hover{border-color:var(--ink);background:#fff;}
.mega-trigger[aria-expanded="true"]{background:var(--ink);color:#fff;border-color:var(--ink);}
.mega-trigger i.fa-chevron-down{transition:transform var(--t);font-size:12px;}
.mega-trigger[aria-expanded="true"] i.fa-chevron-down{transform:rotate(180deg);}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:760px;max-width:min(760px,86vw);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:0 24px 60px -30px rgba(15,17,16,.35);
  padding:28px;display:grid;grid-template-columns:1fr 1.15fr;gap:32px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity 200ms ease-out,transform 200ms ease-out,visibility 200ms;
}
.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{font-size:13px;letter-spacing:.08em;color:var(--muted);margin-bottom:14px;font-weight:700;}
.mega-col ul{list-style:none;margin:0;padding:0;}
.mega-col ul li{margin-bottom:4px;}
.mega-col ul a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:12px;
  font-size:15px;font-weight:600;transition:background var(--t),padding-left var(--t);
}
.mega-col ul a i{color:var(--clay);font-size:12px;}
.mega-col ul a:hover{background:var(--paper);padding-left:16px;}
.mega-mini{
  display:flex;gap:14px;align-items:center;padding:12px;border-radius:14px;
  border:1px solid var(--line);transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.mega-mini:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.mega-mini img{width:76px;height:56px;object-fit:cover;border-radius:10px;background:#E3DFD7;}
.mega-mini span{display:block;font-size:14.5px;font-weight:700;line-height:1.5;}
.mega-mini em{display:block;font-style:normal;font-size:12.5px;color:var(--muted);font-weight:500;margin-top:3px;}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:17px;cursor:pointer;transition:border-color var(--t);
}
.nav-burger:hover{border-color:var(--ink);}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,88vw);z-index:100;
  background:#fff;border-left:1px solid var(--line);
  padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform 260ms cubic-bezier(.16,1,.3,1);
  display:flex;flex-direction:column;gap:20px;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-mask{position:fixed;inset:0;background:rgba(15,17,16,.45);z-index:99;opacity:0;visibility:hidden;transition:opacity 220ms ease-out,visibility 220ms;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:18px;cursor:pointer;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{padding:13px 12px;border-radius:12px;font-weight:700;font-size:16px;border:1px solid transparent;}
.drawer-nav a:hover{background:var(--paper);}
.drawer-nav a.active{background:rgba(200,241,53,.35);border-color:var(--lime);}
.drawer-group h4{font-size:13px;color:var(--muted);letter-spacing:.08em;margin-bottom:10px;}
.drawer-group a{display:block;padding:10px 12px;border-radius:10px;font-size:15px;color:var(--muted);}
.drawer-group a:hover{background:var(--paper);color:var(--ink);}
.drawer-cta{margin-top:auto;}

/* 页面头部 */
.page-head{padding:72px 0 48px;}
.head-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center;}
.page-head h1{margin:16px 0 20px;}
.page-head .lead{max-width:38ch;}
.head-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px;}
.head-figure{position:relative;}
.head-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-img);
  background:#E3DFD7;box-shadow:var(--shadow-2);
}
.head-figure .float-tag{
  position:absolute;left:-10px;bottom:-10px;background:var(--lime);color:var(--ink);
  border-radius:var(--radius-pill);padding:10px 18px;font-size:13.5px;font-weight:800;
  box-shadow:var(--shadow-2);
}
.anchor-bar{margin-top:48px;border-top:1px solid var(--line);padding-top:24px;}
.anchor-scroll{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch;scrollbar-width:none;}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-scroll a{
  flex:0 0 auto;padding:9px 18px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:#fff;font-size:14.5px;font-weight:600;
  transition:border-color var(--t),background var(--t),color var(--t);
}
.anchor-scroll a:hover{border-color:var(--ink);background:var(--ink);color:var(--lime);}

/* 区块通用 */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:640px;margin-bottom:56px;}
.section-head h2{margin-bottom:16px;}
.section-head p{color:var(--muted);}

/* 图文长列表 */
.feature-block{padding:56px 0;border-top:1px solid var(--line);}
.feature-block:first-of-type{border-top:none;padding-top:0;}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.feature-row.reverse .feature-media{order:2;}
.feature-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);
  background:#E3DFD7;border:1px solid var(--line);
}
.feature-copy h2{font-size:clamp(1.35rem,2.2vw,1.75rem);margin-bottom:18px;}
.feature-copy p{color:var(--muted);margin-bottom:14px;}
.pt-list{list-style:none;margin:22px 0 0;padding:0;}
.pt-list li{display:flex;gap:12px;align-items:flex-start;padding:9px 0;font-size:15.5px;font-weight:600;}
.pt-list li i{
  flex:0 0 auto;width:22px;height:22px;margin-top:4px;border-radius:50%;
  background:var(--lime);color:var(--ink);font-size:10px;
  display:inline-flex;align-items:center;justify-content:center;
}

/* 反色统计带 */
.stats-band{background:var(--ink);color:#fff;padding:72px 0;margin:48px 0;}
.stats-band h2{color:#fff;margin-bottom:14px;}
.stats-band .band-sub{color:#A8ADA6;max-width:56ch;}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);margin-top:44px;border-top:1px solid rgba(255,255,255,.16);}
.stat-item{padding:32px 28px 0;border-left:1px solid rgba(255,255,255,.16);}
.stat-item:first-child{border-left:none;padding-left:0;}
.stat-num{font-size:clamp(2.2rem,4vw,3rem);font-weight:800;color:var(--lime);line-height:1;letter-spacing:-0.02em;font-variant-numeric:tabular-nums;}
.stat-title{font-size:16px;font-weight:700;margin:14px 0 8px;}
.stat-desc{font-size:14.5px;color:#A8ADA6;line-height:1.7;}

/* 对比清单 */
.compare-wrap{display:grid;grid-template-columns:2fr 1fr;gap:32px;align-items:start;}
.compare-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:32px;box-shadow:var(--shadow-1);}
.compare-main h3{margin-bottom:22px;}
.compare-line{display:grid;grid-template-columns:1fr 22px 1fr;gap:14px;align-items:center;padding:16px 0;border-top:1px solid var(--line);font-size:15px;}
.compare-line:first-of-type{border-top:none;}
.compare-line .from{color:var(--muted);}
.compare-line .to{font-weight:700;}
.compare-line i{color:var(--lime);text-align:center;font-size:13px;}
.compare-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-1);position:sticky;top:100px;}
.compare-side h3{font-size:1.05rem;margin-bottom:18px;}
.compare-side ul{list-style:none;margin:0;padding:0;}
.compare-side li{display:flex;gap:10px;padding:10px 0;font-size:14.5px;color:var(--muted);border-top:1px solid var(--line);}
.compare-side li:first-child{border-top:none;}
.compare-side li i{color:var(--clay);margin-top:6px;font-size:11px;}

/* 内链区 */
.link-cloud{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.link-cloud a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;
  font-size:15px;font-weight:600;transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.link-cloud a:hover{border-color:var(--ink);transform:translateY(-4px);box-shadow:var(--shadow-2);}
.link-cloud a i{color:var(--clay);font-size:12px;transition:transform var(--t);}
.link-cloud a:hover i{transform:translateX(4px);}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto;}
.accordion{margin:0;padding:0;list-style:none;border-top:1px solid var(--line);background:transparent;}
.accordion .accordion-item{border:none;border-bottom:1px solid var(--line);background:transparent;margin:0;}
.accordion .accordion-title{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0 24px 0;font-size:17px;font-weight:700;color:var(--ink);
  background:transparent;border:none;line-height:1.6;transition:padding-left var(--t);
}
.accordion .accordion-title:hover{padding-left:14px;}
.accordion .accordion-title::before{display:none;}
.accordion .accordion-title::after{
  content:"+";font-size:22px;font-weight:400;color:var(--muted);
  transition:transform 220ms ease-out,color var(--t);flex:0 0 auto;
}
.accordion .accordion-item.is-active .accordion-title::after{transform:rotate(45deg);color:var(--ink);}
.accordion .accordion-item.is-active .accordion-title{padding-left:14px;}
.accordion .accordion-item.is-active .accordion-title::before{
  display:block;content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;background:var(--lime);
}
.accordion .accordion-content{
  padding:0 0 26px 0;border:none;background:transparent;
  font-size:15.5px;line-height:1.85;color:var(--muted);
}
.accordion .accordion-content p{margin-bottom:10px;}
.accordion .accordion-content p:last-child{margin-bottom:0;}

/* CTA 条 */
.cta-band{background:var(--ink);color:#fff;padding:80px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:48px;flex-wrap:wrap;}
.cta-inner h2{color:#fff;max-width:22ch;}
.cta-inner .cta-note{color:#A8ADA6;font-size:14.5px;margin-top:14px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--ink);color:#A8ADA6;padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.site-footer .brand{color:#fff;}
.site-footer .brand-mark{background:var(--lime);color:var(--ink);}
.footer-brand p{font-size:14px;line-height:1.8;margin:18px 0 20px;max-width:32ch;}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.16);
  display:inline-flex;align-items:center;justify-content:center;color:#A8ADA6;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.footer-social a:hover{color:var(--ink);background:var(--lime);border-color:var(--lime);}
.site-footer h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14.5px;color:#A8ADA6;border-bottom:2px solid transparent;padding-bottom:1px;width:fit-content;}
.footer-links a:hover{color:#fff;border-bottom-color:var(--lime);}
.footer-sub-form{display:flex;gap:10px;margin-top:16px;}
.footer-sub-form input{
  flex:1;min-width:0;height:46px;border-radius:var(--radius-input);
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
  color:#fff;padding:0 14px;font-size:14.5px;transition:border-color var(--t),background var(--t);
}
.footer-sub-form input::placeholder{color:#8C918B;}
.footer-sub-form input:focus{outline:none;border-color:var(--lime);background:rgba(255,255,255,.1);}
.footer-sub-form .btn{height:46px;padding:0 20px;}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px;
}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(12px);}
.js .reveal.is-visible{opacity:1;transform:none;transition:opacity 500ms cubic-bezier(.16,1,.3,1),transform 500ms cubic-bezier(.16,1,.3,1);}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;}
  *{transition:none !important;}
}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-burger{display:inline-flex;align-items:center;justify-content:center;}
  .mega-wrap{display:none;}
  .mega-trigger{display:none;}
  .nav-right .btn-primary{display:none;}
  .head-grid{grid-template-columns:1fr;gap:36px;}
  .page-head{padding:52px 0 36px;}
  .section{padding:72px 0;}
  .feature-row{grid-template-columns:1fr;gap:32px;}
  .feature-row.reverse .feature-media{order:0;}
  .compare-wrap{grid-template-columns:1fr;}
  .compare-side{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .link-cloud{grid-template-columns:1fr 1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .stat-item{border-left:none;padding:24px 0 0;border-top:1px solid rgba(255,255,255,.16);}
  .stat-item:first-child{border-top:none;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .container{padding-left:20px;padding-right:20px;}
  .nav-inner{height:66px;gap:12px;}
  .brand{font-size:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:36px;}
  .page-head{padding:40px 0 28px;}
  .head-actions .btn{width:100%;height:52px;}
  .feature-block{padding:40px 0;}
  .compare-line{grid-template-columns:1fr;gap:6px;}
  .compare-line i{text-align:left;transform:rotate(90deg);width:22px;}
  .link-cloud{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-sub-form{flex-direction:column;}
  .footer-sub-form .btn{width:100%;}
  .cta-band{padding:56px 0;}
  .cta-actions .btn{width:100%;height:52px;}
  .anchor-bar{margin-top:32px;}
}

/* roulang page: category2 */
:root{
  --ink:#0F1110;
  --lime:#C8F135;
  --clay:#D4573A;
  --paper:#F6F4EF;
  --white:#FFFFFF;
  --line:#E3DFD7;
  --muted:#5C615C;
  --img-bg:#E3DFD7;
  --r-card:18px;
  --r-img:16px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,17,16,.04);
  --sh-2:0 14px 36px -18px rgba(15,17,16,.22);
  --w:1200px;
  --ease:cubic-bezier(.16,1,.3,1);
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;padding:0;}
ul,ol{list-style:none;}

h1{font-size:clamp(2rem,4.4vw,3.25rem);line-height:1.15;font-weight:800;letter-spacing:-.02em;}
h2{font-size:clamp(1.5rem,2.6vw,2.125rem);line-height:1.25;font-weight:800;letter-spacing:-.015em;}
h3{font-size:1.25rem;line-height:1.5;font-weight:700;}
.num{font-variant-numeric:tabular-nums;}

::selection{background:var(--lime);color:var(--ink);}

a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:var(--w);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(246,244,239,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:28px;
  min-height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:11px;
  background:var(--ink);
  color:var(--lime);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:800;
  letter-spacing:.02em;
  flex:0 0 auto;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-right:auto;
}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:42px;
  padding:0 12px;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  border-radius:var(--r-pill);
  transition:color .18s ease-out;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:7px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{font-weight:700;}

.nav-right{
  display:flex;
  align-items:center;
  gap:12px;
}

/* Mega Menu */
.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:44px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--white);
  color:var(--ink);
  font-size:14.5px;
  font-weight:600;
  cursor:pointer;
  transition:border-color .18s ease-out, background .18s ease-out;
}
.mega-trigger:hover{border-color:var(--ink);}
.mega-trigger[aria-expanded="true"]{background:var(--ink);color:var(--lime);border-color:var(--ink);}
.mega-trigger .fa-chevron-down{font-size:11px;transition:transform .2s var(--ease);}
.mega-trigger[aria-expanded="true"] .fa-chevron-down{transform:rotate(180deg);}

.mega-panel{
  position:absolute;
  top:calc(100% + 14px);
  right:0;
  width:min(880px,calc(100vw - 48px));
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  padding:26px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.mega-wrap:hover .mega-panel,
.mega-wrap:focus-within .mega-panel,
.mega-wrap.open .mega-panel{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.mega-col h4{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--muted);
  margin-bottom:14px;
}
.mega-col ul{display:flex;flex-direction:column;gap:4px;}
.mega-col ul a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 12px;
  border-radius:12px;
  font-size:14.5px;
  font-weight:600;
  transition:background .18s ease-out,color .18s ease-out;
}
.mega-col ul a i{font-size:11px;color:var(--clay);}
.mega-col ul a:hover{background:var(--paper);}
.mega-mini{
  display:flex;
  gap:14px;
  align-items:center;
  padding:12px;
  border:1px solid var(--line);
  border-radius:14px;
  transition:border-color .18s ease-out,transform .18s var(--ease),box-shadow .18s var(--ease);
}
.mega-mini:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:var(--sh-2);}
.mega-mini img{
  width:84px;
  height:60px;
  object-fit:cover;
  border-radius:var(--r-img);
  background:var(--img-bg);
  flex:0 0 auto;
}
.mega-mini span{font-size:14.5px;font-weight:700;line-height:1.5;}
.mega-mini em{display:block;font-style:normal;font-size:13px;font-weight:400;color:var(--muted);margin-top:3px;}

.nav-burger{
  display:none;
  width:46px;
  height:46px;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--white);
  color:var(--ink);
  font-size:17px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:var(--ink);color:var(--lime);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--lime);}
.btn-ghost:active{transform:translateY(1px);}
.btn .fa-arrow-right{transition:transform .18s var(--ease);}
.btn:hover .fa-arrow-right{transform:translateX(4px);}
.btn-sm{height:44px;padding:0 18px;font-size:14.5px;}

.link-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  color:var(--ink);
  border-bottom:2px solid var(--lime);
  padding-bottom:2px;
  transition:border-bottom-width .18s ease-out;
}
.link-text:hover{border-bottom-width:3px;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.6;
}
.badge-clay{background:rgba(212,87,58,.12);color:var(--clay);}
.badge-ink{background:rgba(15,17,16,.08);color:var(--ink);}
.badge-lime{background:var(--lime);color:var(--ink);}

/* ---------- 栅格 ---------- */
.grid-x.gut{margin-left:-12px;margin-right:-12px;}
.grid-x.gut > .cell{padding-left:12px;padding-right:12px;}

/* ---------- 分类页头部 ---------- */
.cat-hero{
  padding:76px 0 8px;
  text-align:center;
}
.cat-hero h1{
  max-width:22ch;
  margin:20px auto 0;
}
.cat-hero .lead{
  max-width:640px;
  margin:20px auto 0;
  font-size:17px;
  line-height:1.9;
  color:var(--muted);
}
.cat-hero .hero-cta{
  margin-top:30px;
  display:flex;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
}
.cat-switch{
  margin-top:44px;
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:4px 4px 14px;
  justify-content:flex-start;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.cat-switch::-webkit-scrollbar{display:none;}
.cat-switch a{
  flex:0 0 auto;
  padding:11px 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--white);
  color:var(--ink);
  font-size:14.5px;
  font-weight:600;
  transition:border-color .18s ease-out,background .18s ease-out,color .18s ease-out;
}
.cat-switch a:hover{border-color:var(--ink);}
.cat-switch a.active{background:var(--ink);color:var(--lime);border-color:var(--ink);}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{position:relative;}
.section-head.mark h2{padding-top:18px;}
.section-head.mark h2::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:12px;
  height:2px;
  background:var(--lime);
}
.section-head.center.mark h2::before{left:50%;transform:translateX(-50%);}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--muted);
  line-height:1.9;
}

/* ---------- 卡片 ---------- */
.info-card{
  height:100%;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),border-color .18s ease-out,box-shadow .18s var(--ease);
}
.info-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.info-icon{
  width:46px;
  height:46px;
  border-radius:14px;
  background:var(--lime);
  color:var(--ink);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  margin-bottom:18px;
}
.info-card h3{margin-bottom:10px;}
.info-card p{font-size:15.5px;color:var(--muted);line-height:1.85;}
.card-tag-row{margin-top:18px;display:flex;gap:8px;flex-wrap:wrap;}

/* ---------- 段落 + 要点 ---------- */
.prose-block{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:start;
}
.prose-block .prose p{
  font-size:16.5px;
  line-height:1.9;
  color:var(--ink);
  margin-bottom:18px;
}
.prose-block .prose p:last-child{margin-bottom:0;}
.check-list{display:grid;grid-template-columns:1fr;gap:0;}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:15.5px;
  line-height:1.8;
}
.check-list li:first-child{border-top:1px solid var(--line);}
.check-list li i{
  color:var(--ink);
  background:var(--lime);
  width:20px;
  height:20px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:10px;
  flex:0 0 auto;
  margin-top:6px;
}

/* ---------- 错位卡片组 ---------- */
.stagger{
  display:grid;
  grid-template-columns:1.55fr 1fr;
  gap:24px;
  align-items:start;
}
.stagger-side{display:grid;gap:24px;margin-top:0;}
.mini-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),border-color .18s ease-out,box-shadow .18s var(--ease);
}
.mini-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.mini-card h3{font-size:1.125rem;margin-bottom:8px;}
.mini-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.mini-card .mini-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.mini-dot{
  width:38px;height:38px;border-radius:12px;
  background:rgba(15,17,16,.06);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;color:var(--ink);flex:0 0 auto;
}
.feature-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),border-color .18s ease-out,box-shadow .18s var(--ease);
}
.feature-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--sh-2);}
.feature-card img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  background:var(--img-bg);
}
.feature-card .fc-body{padding:26px;}
.feature-card h3{margin-bottom:10px;}
.feature-card p{font-size:15.5px;color:var(--muted);line-height:1.85;}

/* ---------- 时间线 ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--line);
}
.tl-item{
  padding:30px 26px 30px 0;
  border-right:1px solid var(--line);
}
.tl-item:last-child{border-right:0;padding-right:0;}
.tl-item:not(:first-child){padding-left:26px;}
.tl-num{
  width:42px;height:42px;
  border-radius:12px;
  background:var(--lime);
  color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;
  margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.tl-item h3{font-size:1.0625rem;margin-bottom:8px;}
.tl-item p{font-size:15px;color:var(--muted);line-height:1.8;}

/* ---------- 规格行 ---------- */
.spec-wrap{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:8px 26px;
  box-shadow:var(--sh-1);
}
.spec-list{border-top:2px solid var(--ink);}
.spec-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{font-size:15.5px;font-weight:700;}
.spec-row dd{font-size:15px;color:var(--muted);text-align:right;}

/* ---------- 相关内链 ---------- */
.link-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 40px;
}
.link-grid a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  font-size:15.5px;
  font-weight:600;
  transition:color .18s ease-out,padding-left .18s var(--ease);
}
.link-grid a i{font-size:12px;color:var(--clay);transition:transform .18s var(--ease);}
.link-grid a:hover{padding-left:6px;}
.link-grid a:hover i{transform:translateX(3px);}

/* ---------- FAQ ---------- */
.accordion{
  background:transparent;
  border:0;
  margin:0;
  padding:0;
  list-style:none;
  border-top:1px solid var(--line);
}
.accordion .accordion-item{
  border:0;
  border-bottom:1px solid var(--line);
}
.accordion .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:24px 0;
  margin:0;
  background:transparent;
  border:0;
  color:var(--ink);
  font-size:17px;
  font-weight:700;
  line-height:1.6;
  transition:color .18s ease-out;
}
.accordion .accordion-title::before{content:none;}
.accordion .accordion-title:hover{color:var(--clay);}
.accordion .accordion-title .faq-q{
  position:relative;
  padding-left:0;
  transition:padding .2s var(--ease);
}
.accordion .accordion-title .faq-q::before{
  content:"";
  position:absolute;
  left:0;
  top:3px;
  bottom:3px;
  width:3px;
  border-radius:2px;
  background:var(--lime);
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform .2s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title .faq-q{padding-left:16px;}
.accordion .accordion-item.is-active .accordion-title .faq-q::before{transform:scaleY(1);}
.accordion .accordion-title .faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;
  transition:transform .2s var(--ease),background .18s ease-out,color .18s ease-out;
}
.accordion .accordion-item.is-active .accordion-title .faq-icon{
  transform:rotate(45deg);
  background:var(--ink);
  color:var(--lime);
  border-color:var(--ink);
}
.accordion .accordion-content{
  background:transparent;
  border:0;
  padding:0 0 26px;
  color:var(--muted);
}
.accordion .accordion-content p{
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
  max-width:44em;
}

/* ---------- CTA 条 ---------- */
.cta-band{
  margin-top:96px;
  background:var(--ink);
  color:var(--white);
  border-radius:0;
  padding:72px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{color:var(--white);max-width:20ch;}
.cta-inner p{margin-top:12px;color:#A8ADA6;font-size:15.5px;max-width:52ch;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.cta-band .btn-ghost{color:var(--white);border-color:rgba(255,255,255,.4);}
.cta-band .btn-ghost:hover{background:var(--white);color:var(--ink);border-color:var(--white);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:var(--white);
  padding:72px 0 0;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:40px;
}
.site-footer h4{
  font-size:15px;
  font-weight:700;
  color:var(--white);
  margin-bottom:16px;
}
.site-footer .brand{color:var(--white);margin-bottom:16px;}
.site-footer .brand-mark{background:var(--lime);color:var(--ink);}
.footer-brand p{
  color:#A8ADA6;
  font-size:14.5px;
  line-height:1.8;
  max-width:320px;
}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:40px;height:40px;
  border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.18);
  color:#A8ADA6;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.footer-social a:hover{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  color:#A8ADA6;
  font-size:14.5px;
  border-bottom:1px solid transparent;
  align-self:flex-start;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.footer-links a:hover{color:var(--white);border-bottom-color:var(--lime);}
.footer-sub-form{display:flex;gap:8px;margin-top:14px;}
.footer-sub-form input{
  flex:1 1 auto;
  min-width:0;
  height:46px;
  padding:0 14px;
  border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:var(--white);
  font-size:14.5px;
}
.footer-sub-form input::placeholder{color:#8A908A;}
.footer-sub-form input:focus{outline:none;border-color:var(--lime);box-shadow:0 0 0 2px rgba(200,241,53,.35);}
.footer-sub-form .btn{height:46px;padding:0 20px;font-size:14.5px;flex:0 0 auto;}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin-top:56px;
  padding:20px 0;
  border-top:1px solid rgba(255,255,255,.12);
  color:#8A908A;
  font-size:13.5px;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-visible{
  opacity:1;
  transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;}
  *{transition-duration:.001ms !important;animation-duration:.001ms !important;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-right .mega-wrap{display:none;}
  .nav-burger{display:inline-flex;}
  .nav-inner{flex-wrap:wrap;gap:14px;padding-top:12px;padding-bottom:12px;}

  .site-header.nav-open .nav-links{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    width:100%;
    order:3;
    margin-right:0;
    padding:8px 0 4px;
    border-top:1px solid var(--line);
  }
  .site-header.nav-open .nav-links a{
    height:48px;
    padding:0 6px;
    border-radius:10px;
    font-size:16px;
  }
  .site-header.nav-open .nav-links a::after{left:6px;right:auto;width:22px;bottom:12px;}
  .site-header.nav-open .nav-right{
    order:4;
    width:100%;
    flex-wrap:wrap;
    justify-content:flex-start;
    padding-bottom:12px;
  }
  .site-header.nav-open .mega-wrap{display:block;width:100%;}
  .site-header.nav-open .mega-panel{
    position:static;
    width:100%;
    grid-template-columns:1fr;
    box-shadow:none;
    margin-top:10px;
    opacity:1;
    visibility:visible;
    transform:none;
    display:none;
  }
  .site-header.nav-open .mega-wrap.open .mega-panel{display:grid;}
  .site-header.nav-open .nav-right .btn-primary{height:52px;flex:1 1 auto;}

  .cat-hero{padding:56px 0 4px;}
  .section{padding:72px 0 0;}
  .prose-block{grid-template-columns:1fr;gap:32px;}
  .stagger{grid-template-columns:1fr;}
  .stagger-side{grid-template-columns:1fr 1fr;}
  .timeline{grid-template-columns:1fr;}
  .tl-item{
    border-right:0;
    border-bottom:1px solid var(--line);
    padding:26px 0;
  }
  .tl-item:not(:first-child){padding-left:0;}
  .tl-item:last-child{border-bottom:0;}
  .link-grid{grid-template-columns:1fr;gap:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-band{padding:56px 0;}
  .site-footer{margin-top:72px;}
  .cta-band{margin-top:72px;}
}

@media (max-width:640px){
  .container{padding:0 20px;}
  body{font-size:16px;}
  .cat-hero{padding:44px 0 0;}
  .cat-hero .lead{font-size:16px;}
  .section{padding:56px 0 0;}
  .section-head{margin-bottom:32px;}
  .info-card{padding:22px;}
  .stagger-side{grid-template-columns:1fr;}
  .spec-wrap{padding:4px 20px;}
  .spec-row{flex-direction:column;align-items:flex-start;gap:6px;}
  .spec-row dd{text-align:left;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-sub-form{flex-direction:column;}
  .footer-sub-form .btn{width:100%;height:52px;}
  .cta-inner{gap:24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;height:52px;}
  .btn{min-height:44px;}
  .footer-bottom{flex-direction:column;}
}