/* roulang page: index */
:root{
  --ink:#1E4B45;
  --ink-900:#163832;
  --ink-100:#E3EDEA;
  --clay:#C9642F;
  --clay-700:#A94F21;
  --mist:#8FB3A9;
  --paper:#F7F6F3;
  --paper-2:#EFEEE9;
  --night:#101C1A;
  --t1:#17201E;
  --t2:#5C6A66;
  --t3:#8B9794;
  --line:#E0DED6;
  --r-card:20px;
  --r-img:14px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(16,28,26,.06);
  --sh-2:0 12px 32px -12px rgba(16,28,26,.18);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gap:clamp(20px,3vw,48px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:100px;scroll-padding-bottom:120px;}
body{
  margin:0;padding:0;
  background:var(--paper);
  color:var(--t1);
  font-family:var(--sans);
  font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:1024px){body{font-size:17px;}}
img{max-width:100%;display:block;border-radius:var(--r-img);object-fit:cover;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease,transform .2s ease;}
a:hover{color:var(--clay);}
button{font-family:inherit;}
h1,h2,h3,h4,h5,h6{
  font-family:var(--serif);
  color:var(--t1);
  margin:0 0 .6em;
  letter-spacing:-.01em;
  line-height:1.25;
  font-weight:700;
}
h1{font-size:clamp(2rem,5.2vw,3.4rem);font-weight:800;line-height:1.16;letter-spacing:-.02em;}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem);line-height:1.22;}
h3{font-size:1.15rem;font-weight:600;line-height:1.4;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1.1em;padding-left:1.2em;}
li{margin-bottom:.4em;}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){.container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.container{padding-left:48px;padding-right:48px;}}
.container-wide{max-width:1280px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.82em 1.6em;
  border-radius:var(--r-btn);
  font-size:.95rem;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--clay);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--clay-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover,.btn-ghost:focus-visible{background:var(--ink);color:#fff;transform:translateY(-1px);}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-light:hover,.btn-light:focus-visible{background:#fff;color:var(--ink);border-color:#fff;}
.btn-sm{padding:.6em 1.15em;font-size:.86rem;}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-block;
  padding:.2em .7em;
  font-size:.75rem;
  letter-spacing:.06em;
  border:1px solid var(--line);
  border-radius:6px;
  background:var(--paper-2);
  color:var(--t2);
  font-family:var(--mono);
}
.badge-clay{border-color:rgba(201,100,47,.4);background:rgba(201,100,47,.08);color:var(--clay-700);}
.badge-ink{border-color:rgba(30,75,69,.35);background:rgba(30,75,69,.06);color:var(--ink);}
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
  margin-bottom:.9em;
}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:transparent;
  transition:background-color .28s ease,box-shadow .28s ease,height .28s ease;
  height:76px;
  display:flex;align-items:center;
}
.site-header.is-scrolled{
  background:rgba(247,246,243,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:0 1px 0 var(--line);
  height:64px;
}
.site-header .nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
  width:100%;
}
.logo{display:flex;align-items:center;gap:.7rem;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  border:1.5px solid var(--ink);
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-100);
}
.logo-mark svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-text .l1{font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;color:var(--mist);text-transform:lowercase;}
.logo-text .l2{font-family:var(--serif);font-size:1.02rem;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.site-header.is-scrolled .logo-text .l2{color:var(--ink-900);}

.nav-links{display:none;align-items:center;gap:2rem;}
@media (min-width:1024px){.nav-links{display:flex;}}
.nav-links a{
  position:relative;
  font-size:.95rem;
  font-weight:500;
  color:var(--t2);
  padding:.35rem 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .24s ease;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:1rem;}
.nav-cta{display:none;}
@media (min-width:768px){.nav-cta{display:inline-flex;}}
.burger{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 9px;
  background:transparent;border:1px solid var(--line);border-radius:10px;
  cursor:pointer;
}
@media (min-width:1024px){.burger{display:none;}}
.burger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .24s ease,opacity .24s ease;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.drawer{
  position:fixed;inset:0;z-index:99;
  background:var(--night);
  padding:110px 28px 48px;
  display:flex;flex-direction:column;gap:.4rem;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer a{
  font-family:var(--serif);
  font-size:1.25rem;
  color:#fff;
  padding:.85rem 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.drawer a:hover{color:var(--mist);}
.drawer .drawer-note{margin-top:1.8rem;font-size:.85rem;color:rgba(255,255,255,.5);line-height:1.8;}

/* ============ Hero ============ */
.hero{
  position:relative;
  min-height:640px;
  display:flex;align-items:center;
  padding:150px 0 96px;
  background-image:linear-gradient(104deg,rgba(16,28,26,.90) 0%,rgba(16,28,26,.74) 38%,rgba(30,75,69,.34) 72%,rgba(30,75,69,.12) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
@media (min-width:1024px){.hero{min-height:720px;padding:170px 0 110px;}}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.045) 0 1px,transparent 1px 4px);
  opacity:.5;
}
.hero .container-wide{position:relative;z-index:2;}
.hero-inner{max-width:680px;}
.hero h1{color:#fff;margin-bottom:.5em;text-shadow:0 2px 24px rgba(16,28,26,.45);}
.hero-sub{
  font-size:1.02rem;line-height:1.9;color:rgba(255,255,255,.86);
  max-width:600px;margin-bottom:2rem;
}
@media (min-width:1024px){.hero-sub{font-size:1.08rem;}}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-bottom:2.2rem;}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;
  padding-top:1.6rem;
  border-top:1px solid rgba(255,255,255,.22);
}
.hero-tags li{
  list-style:none;position:relative;padding-left:1.1em;
  font-size:.85rem;color:rgba(255,255,255,.78);letter-spacing:.02em;margin:0;
}
.hero-tags li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;
  border-radius:50%;background:var(--clay);
}
.hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  z-index:3;font-family:var(--mono);font-size:.68rem;letter-spacing:.24em;
  color:rgba(255,255,255,.55);display:none;
}
@media (min-width:1024px){.hero-scroll{display:block;}}

/* ============ 快速入口条 ============ */
.quickbar{background:var(--ink);color:#fff;}
.quickbar .container-wide{display:grid;grid-template-columns:1fr;gap:0;}
@media (min-width:768px){.quickbar .container-wide{grid-template-columns:repeat(4,1fr);}}
.quick-item{
  padding:1.5rem 0;
  border-bottom:1px solid rgba(255,255,255,.14);
}
@media (min-width:768px){
  .quick-item{padding:1.8rem 1.4rem;border-bottom:0;border-right:1px solid rgba(255,255,255,.14);}
  .quick-item:first-child{padding-left:0;}
  .quick-item:last-child{border-right:0;padding-right:0;}
}
.quick-item .qnum{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;color:var(--mist);}
.quick-item h3{color:#fff;font-size:1rem;margin:.45em 0 .3em;font-family:var(--sans);font-weight:600;}
.quick-item p{font-size:.84rem;color:rgba(255,255,255,.68);line-height:1.7;margin:0;}

/* ============ 通用板块 ============ */
.section{padding:80px 0;}
@media (min-width:1024px){.section{padding:120px 0;}}
.section-alt{background:var(--paper-2);}
.section-night{background:var(--night);color:rgba(255,255,255,.82);}
.section-night h2,.section-night h3{color:#fff;}
.section-head{max-width:660px;margin-bottom:2.6rem;}
.section-head p{color:var(--t2);font-size:1rem;}
.section-night .section-head p{color:rgba(255,255,255,.68);}
.head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1.2rem;margin-bottom:2.6rem;}
.head-row .section-head{margin-bottom:0;}
.text-link{
  font-size:.92rem;font-weight:600;color:var(--ink);
  display:inline-flex;align-items:center;gap:.4em;
  border-bottom:1px solid rgba(30,75,69,.3);padding-bottom:.15em;
}
.text-link:hover{color:var(--clay);border-color:var(--clay);}

/* ============ 卖点：左 sticky + 右编号条目 ============ */
.points-grid{display:grid;grid-template-columns:1fr;gap:2rem;}
@media (min-width:1024px){.points-grid{grid-template-columns:minmax(280px,4fr) 7fr;gap:4.5rem;align-items:start;}}
.points-aside{position:static;}
@media (min-width:1024px){.points-aside{position:sticky;top:110px;}}
.points-aside h2{margin-bottom:.7em;}
.points-aside p{color:var(--t2);font-size:.96rem;}
.points-list{list-style:none;margin:0;padding:0;}
.point-item{
  display:grid;grid-template-columns:auto 1fr;gap:1.2rem;
  padding:1.7rem 0;
  border-top:1px solid var(--line);
  transition:transform .28s ease;
}
.point-item:last-child{border-bottom:1px solid var(--line);}
.point-item:hover{transform:translateX(6px);}
.point-item .pnum{
  font-family:var(--mono);font-size:1.7rem;font-weight:500;
  color:var(--mist);line-height:1;transition:color .28s ease;
}
.point-item:hover .pnum{color:var(--clay);}
.point-item h3{margin-bottom:.35em;font-size:1.08rem;}
.point-item p{color:var(--t2);font-size:.94rem;margin:0;line-height:1.8;}

/* ============ 演示分屏 ============ */
.demo-grid{display:grid;grid-template-columns:1fr;gap:2.4rem;align-items:center;}
@media (min-width:900px){.demo-grid{grid-template-columns:7fr 5fr;gap:3.5rem;}}
.demo-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--paper-2);
  box-shadow:var(--sh-2);
  aspect-ratio:16/10;
}
.demo-visual img{width:100%;height:100%;border-radius:0;transition:transform .6s ease;}
.demo-visual:hover img{transform:scale(1.03);}
.demo-visual .caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:1.1rem 1.4rem;
  background:linear-gradient(0deg,rgba(16,28,26,.88),rgba(16,28,26,0));
  color:#fff;font-size:.84rem;letter-spacing:.02em;
}
.demo-steps{list-style:none;margin:0 0 1.8rem;padding:0;}
.demo-steps li{
  display:grid;grid-template-columns:auto 1fr;gap:1rem;
  padding:1.1rem 0;border-bottom:1px dashed var(--line);
}
.demo-steps li:first-child{padding-top:0;}
.demo-steps .snum{
  font-family:var(--mono);font-size:.85rem;color:#fff;background:var(--ink);
  width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  flex:0 0 26px;margin-top:.3em;
}
.demo-steps h3{font-size:1rem;margin-bottom:.25em;}
.demo-steps p{font-size:.9rem;color:var(--t2);margin:0;}

/* ============ 证据区 ============ */
.stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);overflow:hidden;margin-bottom:3.4rem;
}
@media (min-width:900px){.stats{grid-template-columns:repeat(4,1fr);}}
.stat{background:var(--night);padding:1.8rem 1.4rem;}
.stat .num{
  font-family:var(--mono);font-size:2rem;font-weight:500;color:#fff;line-height:1;
  display:block;margin-bottom:.6em;
}
.stat .num small{font-size:.9rem;color:var(--mist);margin-left:.25em;letter-spacing:.02em;}
.stat .label{font-size:.85rem;color:rgba(255,255,255,.6);line-height:1.7;}

.quotes{display:grid;grid-template-columns:1fr;gap:1.4rem;margin-bottom:3rem;}
@media (min-width:768px){.quotes{grid-template-columns:repeat(3,1fr);align-items:start;gap:1.6rem;}}
.quote{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);
  padding:1.7rem 1.5rem;
  transition:transform .28s ease,border-color .28s ease;
}
.quote:hover{transform:translateY(-4px);border-color:rgba(143,179,169,.6);}
@media (min-width:768px){
  .quote:nth-child(1){margin-top:1.8rem;}
  .quote:nth-child(3){margin-top:.9rem;}
}
.quote p{font-size:.94rem;line-height:1.85;color:rgba(255,255,255,.85);font-family:var(--serif);}
.quote .who{
  margin-top:1.2rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.12);
  font-size:.78rem;letter-spacing:.06em;color:var(--mist);font-family:var(--mono);
}
.cred-badges{display:flex;flex-wrap:wrap;gap:.7rem;}
.cred-badges span{
  font-size:.78rem;letter-spacing:.05em;color:rgba(255,255,255,.72);
  border:1px solid rgba(255,255,255,.22);border-radius:999px;
  padding:.42em 1.1em;
}

/* ============ 方案价格 ============ */
.plans{display:grid;grid-template-columns:1fr;gap:1.6rem;align-items:start;}
@media (min-width:900px){.plans{grid-template-columns:4fr 4.6fr 4fr;gap:1.4rem;}}
.plan{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:2rem 1.7rem;box-shadow:var(--sh-1);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
  position:relative;height:100%;
  display:flex;flex-direction:column;
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(30,75,69,.3);}
.plan-featured{border:2px solid var(--clay);}
@media (min-width:900px){.plan-featured{margin-top:-8px;}}
.plan .plan-tag{
  position:absolute;top:-13px;right:1.6rem;
  background:var(--clay);color:#fff;font-size:.72rem;letter-spacing:.1em;
  padding:.28em .85em;border-radius:6px;font-family:var(--mono);
}
.plan h3{font-size:1.2rem;margin-bottom:.3em;}
.plan .plan-for{font-size:.85rem;color:var(--t3);margin-bottom:1.4rem;}
.plan .plan-price{
  font-family:var(--mono);font-size:1.5rem;color:var(--ink);
  padding-bottom:1.3rem;margin-bottom:1.3rem;border-bottom:1px dashed var(--line);
}
.plan .plan-price small{font-size:.78rem;color:var(--t3);margin-left:.4em;font-family:var(--sans);}
.plan ul{list-style:none;margin:0 0 1.8rem;padding:0;flex-grow:1;}
.plan ul li{
  position:relative;padding-left:1.5em;font-size:.9rem;color:var(--t2);
  margin-bottom:.65em;line-height:1.7;
}
.plan ul li::before{
  content:"";position:absolute;left:0;top:.66em;width:8px;height:8px;
  border-radius:2px;background:var(--ink-100);border:1px solid var(--ink);
}
.plan .btn{width:100%;}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:transparent;border:0;
  display:flex;align-items:flex-start;justify-content:space-between;gap:1.2rem;
  padding:1.4rem 0;text-align:left;cursor:pointer;
  font-size:1.05rem;font-weight:600;color:var(--t1);font-family:var(--sans);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--ink);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;margin-top:.25em;
  transition:transform .26s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--clay);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px;}
.faq-icon::after{left:10px;top:0;width:2px;height:22px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s ease;
}
.faq-a-inner{
  padding:0 3rem 1.5rem 0;
  font-size:.94rem;line-height:1.85;color:var(--t2);
}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:1fr;gap:1.6rem;}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr);}}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(30,75,69,.3);}
.news-link{display:block;color:inherit;height:100%;}
.news-link:hover{color:inherit;}
.news-thumb{
  aspect-ratio:16/10;width:100%;
  background-color:var(--paper-2);
  background-size:cover;background-position:center;
  transition:transform .6s ease;
}
.news-card:nth-child(3n+1) .news-thumb{background-image:url('/assets/images/coverpic/cover-3.webp');}
.news-card:nth-child(3n+2) .news-thumb{background-image:url('/assets/images/coverpic/cover-4.webp');}
.news-card:nth-child(3n) .news-thumb{background-image:url('/assets/images/coverpic/cover-6.png');}
.news-card .news-thumb{overflow:hidden;}
.news-card:hover .news-thumb{transform:scale(1.03);}
.news-body{padding:1.4rem 1.5rem 1.6rem;}
.news-body .badge{margin-bottom:.9rem;}
.news-title{
  font-size:1.08rem;margin-bottom:.6em;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  font-size:.88rem;color:var(--t2);line-height:1.8;margin-bottom:1.1rem;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding-top:.9rem;border-top:1px solid var(--line);
  font-size:.78rem;color:var(--t3);font-family:var(--mono);letter-spacing:.03em;
}
.news-more{color:var(--ink);font-family:var(--sans);font-weight:600;font-size:.84rem;}
.news-card:hover .news-more{color:var(--clay);}
.empty-state{
  border:1px dashed var(--line);border-radius:16px;
  padding:48px 24px;text-align:center;background:#fff;
}
.empty-state .ei{
  width:44px;height:44px;margin:0 auto 1rem;
  border:2px solid rgba(143,179,169,.4);border-radius:12px;
  display:flex;align-items:center;justify-content:center;
}
.empty-state .ei span{width:16px;height:2px;background:rgba(143,179,169,.6);display:block;}
.empty-state p{color:var(--t2);font-size:.95rem;margin-bottom:1.2rem;}

/* ============ 表单 ============ */
.form-band{background:var(--paper-2);}
.form-grid{display:grid;grid-template-columns:1fr;gap:3rem;}
@media (min-width:900px){.form-grid{grid-template-columns:5fr 6fr;gap:4rem;align-items:start;}}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:2rem 1.7rem;box-shadow:var(--sh-1);
}
.field{margin-bottom:1.2rem;}
.field label{
  display:block;font-size:.86rem;color:var(--t2);margin-bottom:.5em;font-weight:500;
}
.field input,.field textarea{
  width:100%;height:48px;padding:0 .95rem;
  border:1px solid var(--line);border-radius:10px;
  background:var(--paper);color:var(--t1);
  font-size:.95rem;font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.field textarea{height:auto;min-height:120px;padding:.8rem .95rem;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{
  outline:none;background:#fff;
  border:2px solid var(--ink);
  box-shadow:0 0 0 4px rgba(30,75,69,.12);
}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field.has-error input,.field.has-error textarea{border-color:var(--clay);}
.form-note{font-size:.8rem;color:var(--t3);margin-top:1rem;line-height:1.7;}
.form-points{list-style:none;padding:0;margin:0 0 2rem;}
.form-points li{
  padding-left:1.6em;position:relative;font-size:.94rem;color:var(--t2);
  margin-bottom:.8em;line-height:1.75;
}
.form-points li::before{
  content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;
  border-radius:50%;border:2px solid var(--clay);
}

/* ============ 结尾 CTA ============ */
.cta-band{
  background:var(--ink);border-radius:24px;
  padding:56px 36px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:2rem;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;
  border-radius:50%;background:rgba(143,179,169,.12);
}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,2.6vw,2rem);margin-bottom:.4em;position:relative;z-index:2;}
.cta-band p{color:rgba(255,255,255,.72);font-size:.95rem;margin:0;position:relative;z-index:2;}
.cta-band .btn{position:relative;z-index:2;}

/* ============ 页脚 ============ */
.site-footer{background:var(--night);color:rgba(255,255,255,.62);padding:70px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2.4rem;padding-bottom:3rem;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:3rem;}}
.footer-brand .logo-text .l2{color:#fff;}
.footer-brand .logo-text .l1{color:var(--mist);}
.footer-brand .logo-mark{background:rgba(143,179,169,.12);border-color:rgba(143,179,169,.5);}
.footer-brand .logo-mark svg{stroke:var(--mist);}
.footer-brand p{font-size:.86rem;line-height:1.85;margin-top:1.2rem;color:rgba(255,255,255,.55);max-width:320px;}
.footer-col h4{
  font-family:var(--sans);font-size:.82rem;letter-spacing:.14em;color:#fff;
  text-transform:uppercase;margin-bottom:1.2rem;font-weight:600;
}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:.7em;}
.footer-col a{color:rgba(255,255,255,.62);font-size:.88rem;}
.footer-col a:hover{color:var(--mist);}
.footer-col .contact-line{font-size:.88rem;margin-bottom:.7em;color:rgba(255,255,255,.62);}
.footer-col .contact-line b{color:rgba(255,255,255,.85);font-weight:500;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:1.6rem 0 1.8rem;
  display:flex;flex-wrap:wrap;gap:.8rem 1.6rem;
  align-items:center;justify-content:space-between;
  font-size:.78rem;color:rgba(255,255,255,.42);
}
.footer-social{display:flex;gap:1.1rem;}
.footer-social a{color:rgba(255,255,255,.5);display:flex;align-items:center;}
.footer-social a:hover{color:var(--mist);}
.footer-social svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.6;}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:90;
  display:none;align-items:center;gap:.5em;
  background:var(--clay);color:#fff;
  padding:.85em 1.5em;border-radius:999px;
  font-size:.9rem;font-weight:600;
  box-shadow:0 12px 32px -12px rgba(16,28,26,.4);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--clay-700);color:#fff;transform:translateY(-2px);}
@media (min-width:1024px){.float-cta{display:inline-flex;}}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:var(--ink);color:#fff;
  height:56px;padding:0 20px;
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 20px -8px rgba(16,28,26,.4);
}
@media (min-width:1024px){.mobile-bar{display:none;}}
.mobile-bar span{font-size:.85rem;color:rgba(255,255,255,.78);}
.mobile-bar a{color:#fff;font-size:.87rem;font-weight:600;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:1px;}

/* ============ 滚动动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .news-card:hover,.plan:hover,.quote:hover,.point-item:hover{transform:none;}
  .news-card:hover .news-thumb,.demo-visual:hover img{transform:none;}
  .btn:hover{transform:none;}
}

@media (max-width:767px){
  .hero{padding:130px 0 84px;min-height:560px;}
  .cta-band{padding:40px 24px;border-radius:20px;}
  .plan{padding:1.7rem 1.4rem;}
  .faq-a-inner{padding-right:1rem;}
  .site-footer{padding-bottom:56px;}
}

/* roulang page: category1 */
:root{
  --ink:#1E4B45;
  --ink-900:#163832;
  --ink-100:#E3EDEA;
  --clay:#C9642F;
  --clay-700:#A94F21;
  --mist:#8FB3A9;
  --paper:#F7F6F3;
  --paper-2:#EFEEE9;
  --night:#101C1A;
  --t1:#17201E;
  --t2:#5C6A66;
  --t3:#8B9794;
  --line:#E0DED6;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --r-xs:6px;
  --sh-1:0 1px 2px rgba(16,28,26,.06);
  --sh-2:0 12px 32px -12px rgba(16,28,26,.18);
  --font-serif:'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',serif;
  --font-sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --header-h:72px;
}
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:92px; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background:var(--paper);
  background-image:radial-gradient(rgba(30,75,69,.035) 1px, transparent 1px);
  background-size:22px 22px;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-serif);
  color:var(--t1);
  margin:0 0 .6em;
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  text-align:left;
}
h1{ font-size:clamp(2rem,5.2vw,3.6rem); font-weight:800; line-height:1.12; }
h2{ font-size:clamp(1.6rem,3.4vw,2.4rem); line-height:1.2; }
h3{ font-size:1.2rem; font-weight:600; }
p{ margin:0 0 1em; color:var(--t2); }
p:last-child{ margin-bottom:0; }
a{ color:var(--ink); text-decoration:none; background:transparent; transition:color .22s ease; }
a:hover,a:focus{ color:var(--clay); }
ul,ol{ margin:0; padding:0; list-style:none; }
img{ max-width:100%; height:auto; display:block; }
button{ font-family:inherit; border:0; background:none; cursor:pointer; }
input,textarea,select{ font-family:inherit; }
strong,b{ font-weight:700; color:var(--t1); }
svg{ display:block; }
:focus-visible{ outline:2px solid var(--ink); outline-offset:3px; }
::selection{ background:var(--ink-100); color:var(--ink-900); }

/* ---------- Foundation 覆盖 ---------- */
body,.button,button,input,select,textarea{ font-family:var(--font-sans); }
[type=text],[type=email],[type=password],textarea{ border-radius:var(--r-sm); }
.grid-x{ display:flex; flex-wrap:wrap; margin-left:-.75rem; margin-right:-.75rem; }
.grid-x > .cell{ flex:0 0 auto; width:100%; padding-left:.75rem; padding-right:.75rem; min-width:0; }
.accordion-title{ font-size:1.05rem; }
.reveal-list li{ list-style:none; }

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){ .container{ padding-left:32px; padding-right:32px; } }
@media (min-width:1024px){ .container{ padding-left:48px; padding-right:48px; } }

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:80;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:height .28s ease, background-color .28s ease, border-color .28s ease, box-shadow .28s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(247,246,243,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(16,28,26,.05);
}
.header-inner{ display:flex; align-items:center; gap:1.5rem; width:100%; }
.logo{ display:inline-flex; align-items:center; gap:.65rem; flex:none; }
.logo-mark{
  width:38px; height:38px;
  border-radius:10px;
  display:grid; place-items:center;
  background:var(--ink);
  color:#fff;
  border:1px solid var(--ink-900);
  flex:none;
}
.logo-mark svg{ width:20px; height:20px; fill:none; stroke:currentColor; stroke-width:1.6; stroke-linejoin:round; stroke-linecap:round; }
.logo-text{ display:flex; flex-direction:column; line-height:1.08; }
.logo-text .l1{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--t3);
}
.logo-text .l2{ font-size:.98rem; font-weight:700; color:var(--ink); letter-spacing:.01em; }

.nav-links{ margin-left:auto; display:flex; align-items:center; gap:1.9rem; }
.nav-links a{
  position:relative;
  font-size:.94rem;
  font-weight:500;
  color:var(--t2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:'';
  position:absolute;
  left:0; right:0; bottom:-3px;
  height:2px;
  background:var(--ink);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s cubic-bezier(.22,.61,.36,1);
}
.nav-links a:hover{ color:var(--ink); }
.nav-links a:hover::after{ transform:scaleX(1); }
.nav-links a.is-active{ color:var(--ink); font-weight:700; }
.nav-links a.is-active::after{ transform:scaleX(1); }

.header-actions{ display:flex; align-items:center; gap:.9rem; flex:none; }

.site-header:not(.is-scrolled) .logo-mark{ background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.4); }
.site-header:not(.is-scrolled) .logo-text .l1{ color:rgba(255,255,255,.72); }
.site-header:not(.is-scrolled) .logo-text .l2{ color:#fff; }
.site-header:not(.is-scrolled) .nav-links a{ color:rgba(255,255,255,.82); }
.site-header:not(.is-scrolled) .nav-links a:hover,
.site-header:not(.is-scrolled) .nav-links a.is-active{ color:#fff; }
.site-header:not(.is-scrolled) .nav-links a::after{ background:#fff; }
.site-header:not(.is-scrolled) .nav-toggle span{ background:#fff; }

.nav-toggle{
  display:none;
  width:42px; height:42px;
  border-radius:var(--r-sm);
  border:1px solid rgba(224,222,214,.6);
  padding:11px 10px;
  flex-direction:column;
  justify-content:space-between;
}
.nav-toggle span{ display:block; height:2px; width:100%; background:var(--ink); border-radius:2px; transition:background .22s; }

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:var(--night);
  padding:26px 24px 36px;
  display:flex;
  flex-direction:column;
  gap:1.5rem;
  transform:translateX(102%);
  visibility:hidden;
  transition:transform .24s ease, visibility .24s ease;
}
.mobile-drawer.is-open{ transform:translateX(0); visibility:visible; }
.drawer-top{ display:flex; align-items:center; justify-content:space-between; }
.mobile-drawer .logo-text .l1{ color:rgba(255,255,255,.65); }
.mobile-drawer .logo-text .l2{ color:#fff; }
.mobile-drawer .logo-mark{ background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.4); }
.drawer-close{
  width:40px; height:40px;
  border:1px solid rgba(255,255,255,.3);
  border-radius:50%;
  color:#fff;
  display:grid; place-items:center;
  font-size:1.1rem;
}
.drawer-close:hover{ background:rgba(255,255,255,.12); color:#fff; }
.drawer-nav{ display:flex; flex-direction:column; gap:.2rem; margin-top:.5rem; }
.drawer-nav a{
  color:rgba(255,255,255,.86);
  font-size:1.15rem;
  font-family:var(--font-serif);
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.drawer-nav a:hover,.drawer-nav a.is-active{ color:#fff; padding-left:6px; }
.drawer-foot{ margin-top:auto; }
.drawer-foot p{ color:rgba(255,255,255,.6); font-size:.86rem; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  font-size:.95rem;
  font-weight:600;
  padding:13px 24px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .22s ease, color .22s ease, transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-clay{ background:var(--clay); color:#fff; }
.btn-clay:hover,.btn-clay:focus{ background:var(--clay-700); color:#fff; }
.btn-ink{ background:var(--ink); color:#fff; }
.btn-ink:hover,.btn-ink:focus{ background:var(--ink-900); color:#fff; }
.btn-ghost{ background:transparent; color:#fff; border-color:rgba(255,255,255,.55); }
.btn-ghost:hover,.btn-ghost:focus{ background:rgba(255,255,255,.14); color:#fff; }
.btn-outline{ background:transparent; color:var(--ink); border-color:var(--ink); }
.btn-outline:hover,.btn-outline:focus{ background:var(--ink); color:#fff; }
.btn-sm{ padding:9px 17px; font-size:.87rem; }
.text-link{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  font-weight:600;
  font-size:.95rem;
  color:var(--ink);
  border-bottom:1px solid rgba(30,75,69,.35);
  padding-bottom:2px;
}
.text-link:hover{ color:var(--clay); border-bottom-color:var(--clay); }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:80vh;
  display:flex;
  align-items:flex-end;
  padding:150px 0 70px;
  overflow:hidden;
  isolation:isolate;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  z-index:-2;
}
.hero::after{
  content:'';
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(180deg, rgba(16,28,26,.66) 0%, rgba(22,60,55,.46) 42%, rgba(16,28,26,.82) 100%);
}
.hero-inner{ color:#fff; max-width:840px; }
.hero h1{ color:#fff; margin:1rem 0 1.1rem; text-shadow:0 2px 18px rgba(0,0,0,.24); }
.hero-sub{
  color:rgba(255,255,255,.88);
  font-size:clamp(1rem,1.8vw,1.1rem);
  line-height:1.9;
  max-width:58ch;
}
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:2rem; }
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:1.4rem;
  margin-top:2.4rem;
  padding-top:1.4rem;
  border-top:1px solid rgba(255,255,255,.24);
}
.hero-trust li{
  display:flex;
  align-items:center;
  gap:.55rem;
  font-size:.86rem;
  letter-spacing:.02em;
  color:rgba(255,255,255,.8);
}
.hero-trust li::before{
  content:'';
  width:6px; height:6px;
  border-radius:50%;
  background:var(--mist);
  flex:none;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  font-size:.82rem;
  letter-spacing:.04em;
  color:rgba(255,255,255,.72);
}
.breadcrumb a{ color:rgba(255,255,255,.82); }
.breadcrumb a:hover{ color:#fff; }
.breadcrumb .sep{ opacity:.5; }
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--clay);
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
}
.hero .eyebrow{
  background:rgba(255,255,255,.12);
  border-color:rgba(255,255,255,.32);
  color:#F2D8C6;
}
.eyebrow--light{
  background:rgba(255,255,255,.1);
  border-color:rgba(255,255,255,.28);
  color:#F2D8C6;
}

/* ---------- 通用板块 ---------- */
.section{ position:relative; padding:80px 0; }
@media (min-width:1024px){ .section{ padding:120px 0; } }
.section--paper2{ background:var(--paper-2); }
.section--night{ background:var(--night); color:#fff; }
.section--night h2,.section--night h3{ color:#fff; }
.section--night p{ color:rgba(255,255,255,.72); }
.section--tight{ padding:56px 0; }
.section-head{ max-width:720px; margin-bottom:2.6rem; }
.section-head h2{ margin:.9rem 0 .8rem; }
.section-lead{ font-size:1.02rem; line-height:1.9; color:var(--t2); }
.section--night .section-lead{ color:rgba(255,255,255,.74); }

/* ---------- 步骤时间线 ---------- */
.steps{ border-top:1px solid var(--line); }
.step{
  display:grid;
  grid-template-columns:76px 1fr;
  gap:1.4rem;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:transform .32s cubic-bezier(.22,.61,.36,1), border-color .32s ease, background-color .32s ease;
}
.step:hover{ transform:translateX(6px); border-color:rgba(30,75,69,.3); }
.step-num{
  font-family:var(--font-mono);
  font-size:1.9rem;
  font-weight:600;
  line-height:1.05;
  color:var(--mist);
  transition:color .32s ease;
}
.step:hover .step-num{ color:var(--clay); }
.step-body h3{ margin-bottom:.35rem; font-size:1.15rem; }
.step-body p{ font-size:.97rem; line-height:1.85; }
.step-note{
  display:inline-block;
  margin-top:.7rem;
  padding-left:.7rem;
  border-left:2px solid var(--mist);
  font-size:.82rem;
  color:var(--t3);
  line-height:1.6;
}
@media (min-width:768px){
  .step{ grid-template-columns:110px 1fr; gap:2rem; padding:30px 0; }
  .step-num{ font-size:2.4rem; }
}

/* ---------- 场景卡 ---------- */
.scenes{ display:grid; gap:22px; }
@media (min-width:900px){
  .scenes{ grid-template-columns:1.35fr 1fr; align-items:start; }
  .scene:nth-child(2){ margin-top:36px; }
  .scene:nth-child(3){ margin-top:-14px; }
}
.scene{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:transform .3s cubic-bezier(.22,.61,.36,1), box-shadow .3s ease, border-color .3s ease;
}
.scene:hover{ transform:translateY(-4px); box-shadow:var(--sh-2); border-color:rgba(30,75,69,.3); }
.scene h3{ margin-bottom:.35rem; }
.scene p{ font-size:.95rem; line-height:1.82; }
.scene-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--ink-100);
  border-radius:var(--r-xs);
  padding:4px 9px;
  margin-bottom:.9rem;
}
.thumb{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-md);
  background:var(--paper-2);
  margin-bottom:18px;
}
.thumb img{ width:100%; height:100%; object-fit:cover; transition:transform .6s cubic-bezier(.22,.61,.36,1); }
.scene:hover .thumb img{ transform:scale(1.03); }
.thumb--16x10{ aspect-ratio:16/10; }
.thumb--4x3{ aspect-ratio:4/3; }

/* ---------- 准备清单 ---------- */
.prepare-grid{ align-items:start; }
.prepare-aside h2{ margin:.9rem 0 .8rem; }
.checklist{ display:grid; gap:14px; margin-top:1.6rem; }
@media (min-width:640px){ .checklist{ grid-template-columns:1fr 1fr; } }
.checklist li{
  display:flex;
  align-items:flex-start;
  gap:.7rem;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:14px 16px;
  font-size:.94rem;
  line-height:1.75;
  color:var(--t2);
  transition:border-color .25s ease, transform .25s ease;
}
.checklist li:hover{ border-color:rgba(30,75,69,.3); transform:translateY(-2px); }
.checklist li::before{
  content:'';
  flex:none;
  width:16px; height:16px;
  margin-top:.42rem;
  border-radius:4px;
  border:2px solid var(--clay);
  background:
    linear-gradient(45deg, transparent 44%, var(--clay) 44%, var(--clay) 56%, transparent 56%) no-repeat 47% 52% / 9px 9px;
}
.prepare-figure{ margin:0; }
.prepare-figure figcaption{ font-size:.79rem; color:var(--t3); margin-top:.7rem; }

/* ---------- 深色排查区 ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:26px;
  margin:0 0 48px;
  padding:28px 0 30px;
  border-top:1px solid rgba(255,255,255,.16);
  border-bottom:1px solid rgba(255,255,255,.16);
}
@media (min-width:768px){ .stats{ grid-template-columns:repeat(4,1fr); } }
.stat b{
  display:block;
  font-family:var(--font-mono);
  font-size:2.1rem;
  font-weight:600;
  color:#fff;
  line-height:1.1;
  letter-spacing:-.02em;
}
.stat span{ display:block; font-size:.84rem; color:rgba(255,255,255,.62); margin-top:.4rem; }
.fix-grid{
  display:grid;
  gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-lg);
  overflow:hidden;
}
@media (min-width:768px){ .fix-grid{ grid-template-columns:1fr 1fr; } }
.fix{ background:var(--night); padding:26px 24px; transition:background-color .3s ease; }
.fix:hover{ background:#16241F; }
.fix h3{
  font-size:1.05rem;
  font-family:var(--font-sans);
  font-weight:700;
  margin-bottom:.5rem;
  display:flex;
  gap:.6rem;
  align-items:baseline;
}
.fix h3 em{
  font-style:normal;
  font-family:var(--font-mono);
  font-size:.82rem;
  color:var(--mist);
}
.fix p{ font-size:.93rem; line-height:1.8; margin:0; }

/* ---------- 图文建议 ---------- */
.tips-grid{ align-items:center; }
.tip-list{ display:grid; gap:18px; margin:1.4rem 0 1.8rem; }
.tip-list li{
  display:grid;
  grid-template-columns:38px 1fr;
  gap:1rem;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.tip-list li:last-child{ border-bottom:0; padding-bottom:0; }
.tip-list .tip-num{
  font-family:var(--font-mono);
  font-size:.95rem;
  color:var(--mist);
  padding-top:.15rem;
}
.tip-list h3{ font-size:1.05rem; margin-bottom:.25rem; }
.tip-list p{ font-size:.94rem; line-height:1.8; }

/* ---------- FAQ ---------- */
.faq{ max-width:820px; margin:0 auto; border-top:1px solid var(--line); }
.faq-item{ border-bottom:1px solid var(--line); }
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.2rem;
  padding:22px 0;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-serif);
  font-size:1.04rem;
  font-weight:600;
  color:var(--t1);
  transition:color .22s ease;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary:hover{ color:var(--clay); }
.faq-icon{
  position:relative;
  flex:none;
  width:22px; height:22px;
  border-radius:50%;
  border:1px solid rgba(201,100,47,.4);
}
.faq-icon::before,
.faq-icon::after{
  content:'';
  position:absolute;
  left:50%; top:50%;
  transform:translate(-50%,-50%);
  background:var(--clay);
  transition:transform .26s ease, opacity .26s ease;
}
.faq-icon::before{ width:10px; height:2px; }
.faq-icon::after{ width:2px; height:10px; }
.faq-item[open] .faq-icon::after{ transform:translate(-50%,-50%) rotate(90deg); opacity:0; }
.faq-body{ padding:0 0 24px; max-width:92%; }
.faq-body p{ font-size:.95rem; line-height:1.85; }

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--ink);
  border-radius:24px;
  padding:44px 28px;
  display:grid;
  gap:26px;
  align-items:center;
  box-shadow:var(--sh-2);
}
.cta-band h2{ color:#fff; margin:.9rem 0 .6rem; }
.cta-band p{ color:rgba(255,255,255,.78); margin:0; font-size:.98rem; }
@media (min-width:900px){
  .cta-band{ grid-template-columns:1fr auto; padding:56px 48px; gap:40px; }
  .cta-band .btn{ white-space:nowrap; }
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--paper-2);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{ display:grid; gap:2.4rem; }
@media (min-width:768px){ .footer-grid{ grid-template-columns:1.6fr 1fr 1fr 1.2fr; gap:2rem; } }
.footer-brand p{ font-size:.92rem; line-height:1.85; color:var(--t2); margin-top:1.1rem; max-width:32ch; }
.footer-col h4{
  font-family:var(--font-sans);
  font-size:.88rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--t1);
  margin-bottom:1.1rem;
}
.footer-col ul li{ margin-bottom:.65rem; }
.footer-col ul a{ font-size:.92rem; color:var(--t2); }
.footer-col ul a:hover{ color:var(--clay); }
.contact-line{ font-size:.9rem; color:var(--t2); margin:0 0 .6rem; line-height:1.7; }
.contact-line b{ color:var(--t1); font-weight:600; margin-right:.35rem; }
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:.83rem;
  color:var(--t3);
}
.footer-social{ display:flex; gap:10px; }
.footer-social a{
  width:34px; height:34px;
  border:1px solid var(--line);
  border-radius:50%;
  display:grid; place-items:center;
  color:var(--t2);
  transition:border-color .24s ease, color .24s ease, transform .24s ease;
}
.footer-social a:hover{ border-color:var(--ink); color:var(--ink); transform:translateY(-2px); }
.footer-social svg{ width:16px; height:16px; fill:none; stroke:currentColor; stroke-width:1.6; stroke-linejoin:round; stroke-linecap:round; }

/* ---------- 动效 ---------- */
html.js-reveal .reveal{ opacity:0; transform:translateY(12px); }
html.js-reveal .reveal.is-in{
  opacity:1;
  transform:none;
  transition:opacity .48s cubic-bezier(.22,.61,.36,1), transform .48s cubic-bezier(.22,.61,.36,1);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links{ gap:1.3rem; }
  .nav-links a{ font-size:.9rem; }
}
@media (max-width:900px){
  .nav-links,.header-actions .btn{ display:none; }
  .nav-toggle{ display:flex; }
  .header-actions{ margin-left:auto; }
  .hero{ min-height:74vh; padding:132px 0 60px; }
}
@media (max-width:640px){
  body{ font-size:15.5px; }
  .section{ padding:64px 0; }
  .section-head{ margin-bottom:2rem; }
  .hero{ min-height:70vh; }
  .hero-actions .btn{ width:100%; }
  .step{ grid-template-columns:52px 1fr; gap:1rem; }
  .step-num{ font-size:1.5rem; }
  .faq-body{ max-width:100%; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
}
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  html.js-reveal .reveal{ opacity:1; transform:none; }
  .scene:hover,.step:hover,.btn:hover{ transform:none; }
}

/* roulang page: article */
:root{
  --ink:#1E4B45;
  --ink-900:#163832;
  --ink-100:#E3EDEA;
  --clay:#C9642F;
  --clay-700:#A94F21;
  --mist:#8FB3A9;
  --paper:#F7F6F3;
  --paper-2:#EFEEE9;
  --night:#101C1A;
  --t1:#17201E;
  --t2:#5C6A66;
  --t3:#8B9794;
  --line:#E0DED6;
  --r-card:20px;
  --r-img:14px;
  --r-btn:10px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(16,28,26,.06);
  --sh-2:0 12px 32px -12px rgba(16,28,26,.18);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;scroll-padding-bottom:120px}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(0deg,rgba(30,75,69,.022) 0 1px,transparent 1px 26px),
    radial-gradient(circle at 12% 8%,rgba(201,100,47,.06),transparent 42%);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:var(--ink);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--clay)}
h1,h2,h3,h4{font-family:var(--serif);margin:0;color:var(--t1)}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.2em;padding-left:1.3em}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:640px){.container{padding:0 32px}}
@media(min-width:1024px){.container{padding:0 48px}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(247,246,243,.86);
  transition:height .28s ease,background .28s ease,box-shadow .28s ease;
  height:72px;display:flex;align-items:center;
  border-bottom:1px solid transparent;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:3px;
  background:repeating-linear-gradient(90deg,var(--ink) 0 18px,transparent 18px 26px);
  opacity:.25;
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(247,246,243,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;line-height:1.1}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  background:var(--ink-100);border:2px solid var(--ink);
  display:flex;align-items:center;justify-content:center;
  box-shadow:3px 3px 0 rgba(30,75,69,.16);
}
.logo-mark svg{width:20px;height:20px;fill:none;stroke:var(--ink);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.logo-text{display:flex;flex-direction:column}
.logo-text .l1{font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--t3);font-weight:600}
.logo-text .l2{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.nav-links{display:none;align-items:center;gap:28px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-links a{
  position:relative;font-size:15px;color:var(--t2);font-weight:500;padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .26s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink);font-weight:700}
.header-cta{display:none}
@media(min-width:1024px){.header-cta{display:inline-flex}}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:12px 22px;border-radius:var(--r-btn);border:2px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .22s ease,background .22s ease,color .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--clay);color:#fff;box-shadow:3px 3px 0 rgba(169,79,33,.28)}
.btn-primary:hover{background:var(--clay-700);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-sm{padding:9px 16px;font-size:14px}
.burger{
  width:44px;height:44px;border:2px solid var(--ink);border-radius:12px;background:transparent;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
@media(min-width:1024px){.burger{display:none}}
.burger span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .24s ease,opacity .24s ease}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  position:fixed;inset:0;background:var(--night);z-index:70;
  padding:96px 28px 40px;display:flex;flex-direction:column;gap:6px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer a{
  color:#fff;font-family:var(--serif);font-size:20px;font-weight:600;
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.drawer a:hover,.drawer a.is-active{color:var(--clay)}
.drawer .drawer-close{
  position:absolute;top:20px;right:24px;width:44px;height:44px;border-radius:12px;
  border:2px solid rgba(255,255,255,.4);background:transparent;color:#fff;cursor:pointer;font-size:18px;
}
.drawer-note{color:rgba(255,255,255,.5);font-size:13px;margin-top:22px}

/* ---------- article hero ---------- */
.article-head{padding:130px 0 40px;background:var(--paper)}
.crumb{font-size:13px;letter-spacing:.04em;color:var(--t3);display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:26px}
.crumb a{color:var(--t3)}
.crumb a:hover{color:var(--clay)}
.crumb .sep{color:var(--mist)}
.crumb .now{color:var(--t2);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head h1{
  font-size:clamp(1.85rem,4.4vw,3rem);line-height:1.24;font-weight:800;letter-spacing:-.01em;
  max-width:20ch;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;font-size:13px;letter-spacing:.04em;color:var(--t3)}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:var(--r-badge);
  background:var(--ink-100);color:var(--ink);font-size:12.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(30,75,69,.16);
}
.badge-clay{background:rgba(201,100,47,.12);color:var(--clay-700);border-color:rgba(201,100,47,.24)}
.article-cover{
  margin-top:40px;border-radius:var(--r-card);overflow:hidden;
  border:2px solid var(--ink);box-shadow:8px 8px 0 rgba(30,75,69,.12);
  background:var(--paper-2);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ---------- layout ---------- */
.article-main{padding:56px 0 80px;background:var(--paper-2)}
.article-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media(min-width:1024px){.article-grid{grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}}
.paper-sheet{
  background:var(--paper);border:2px solid var(--line);border-radius:var(--r-card);
  padding:28px 22px;box-shadow:var(--sh-1);
}
@media(min-width:768px){.paper-sheet{padding:52px 56px}}
.article-body{max-width:720px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--t1)}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  position:relative;font-size:clamp(1.35rem,2.6vw,1.75rem);line-height:1.35;
  margin:2.2em 0 .8em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:2px;background:var(--clay);
}
.article-body h3{font-size:1.16rem;font-weight:700;margin:1.8em 0 .6em}
.article-body h4{font-size:1.02rem;font-weight:700;margin:1.5em 0 .5em;color:var(--ink)}
.article-body p{margin:0 0 1.15em;color:#243230}
.article-body a{color:var(--clay);border-bottom:1px solid rgba(201,100,47,.4)}
.article-body a:hover{color:var(--clay-700)}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.3em}
.article-body li{margin:.4em 0}
.article-body blockquote{
  margin:1.6em 0;padding:18px 24px;background:var(--paper-2);
  border-left:3px solid var(--ink);border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--t2);font-size:1rem;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:1.6em auto;box-shadow:none}
.article-body figure{margin:1.8em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--t3);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body thead th{background:var(--paper-2);font-weight:700;color:var(--ink)}
.article-body code{font-family:var(--mono);font-size:.9em;background:var(--paper-2);padding:2px 6px;border-radius:6px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* ---------- sidebar ---------- */
.side{display:flex;flex-direction:column;gap:22px}
@media(min-width:1024px){
  .side{position:sticky;top:96px}
}
.side-card{
  background:var(--paper);border:2px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:1rem;margin-bottom:14px;color:var(--ink)}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.side-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--t2);line-height:1.7}
.side-list .num{font-family:var(--mono);font-size:12px;color:var(--mist);padding-top:2px}
.side-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0}
.side-links li{border-bottom:1px solid var(--line)}
.side-links li:last-child{border-bottom:0}
.side-links a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 0;font-size:14.5px;color:var(--t2)}
.side-links a:hover{color:var(--clay)}
.side-links i{font-size:12px;color:var(--mist)}
.side-cta{
  background:var(--ink);color:#fff;border-radius:var(--r-card);padding:24px;
  border:2px solid var(--ink-900);
}
.side-cta h3{color:#fff;font-size:1.05rem;margin-bottom:8px}
.side-cta p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.75;margin-bottom:16px}
.side-cta .btn-primary{width:100%}

/* ---------- empty state ---------- */
.empty{
  border:1px dashed var(--line);border-radius:16px;background:var(--paper);
  padding:56px 24px;text-align:center;
}
.empty i{font-size:34px;color:rgba(143,179,169,.7)}
.empty h2{font-size:1.3rem;margin:18px 0 8px}
.empty p{color:var(--t2);max-width:44ch;margin:0 auto 22px}

/* ---------- footer actions ---------- */
.article-foot{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;margin-top:48px;padding-top:26px;border-top:1px solid var(--line)}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--ink);transition:transform .22s ease}
.back-link:hover{transform:translateX(-4px);color:var(--clay)}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--t2)}
.to-top:hover{color:var(--clay)}

/* ---------- related ---------- */
.related{padding:80px 0;background:var(--paper)}
.section-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:34px}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.24}
.section-head p{color:var(--t2);font-size:15px;margin:8px 0 0;max-width:52ch}
.text-link{font-size:14.5px;font-weight:600;color:var(--clay);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--clay-700);gap:10px}
.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.rcard{
  display:flex;flex-direction:column;background:var(--paper);
  border:2px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(30,75,69,.4)}
.rcard .thumb{overflow:hidden;background:var(--paper-2)}
.rcard .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s ease}
.rcard:hover .thumb img{transform:scale(1.03)}
.rcard .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard h3{font-size:1.08rem;line-height:1.5}
.rcard p{font-size:14.5px;color:var(--t2);margin:0;flex:1}
.rcard .meta{font-size:12.5px;color:var(--t3);letter-spacing:.04em;display:flex;gap:10px;align-items:center}

/* ---------- cta band ---------- */
.cta-band{padding:0 0 80px;background:var(--paper-2)}
.cta-inner{
  background:var(--ink);color:#fff;border-radius:24px;padding:44px 28px;
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
  border:2px solid var(--ink-900);box-shadow:10px 10px 0 rgba(30,75,69,.14);
}
@media(min-width:768px){.cta-inner{padding:56px 48px}}
.cta-inner h2{color:#fff;font-size:clamp(1.4rem,2.8vw,2rem);line-height:1.3;max-width:22ch}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;margin:10px 0 0;max-width:46ch}

/* ---------- footer ---------- */
.site-footer{background:var(--night);color:rgba(255,255,255,.7);padding:64px 0 32px;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}}
.site-footer .logo-text .l1{color:rgba(255,255,255,.5)}
.site-footer .logo-text .l2{color:#fff}
.site-footer .logo-mark{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.35);box-shadow:none}
.site-footer .logo-mark svg{stroke:#fff}
.footer-brand p{font-size:14.5px;line-height:1.8;margin:18px 0 0;color:rgba(255,255,255,.6)}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-family:var(--sans);font-weight:700;letter-spacing:.02em}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.footer-col a{color:rgba(255,255,255,.68);font-size:14.5px}
.footer-col a:hover{color:var(--clay)}
.contact-line{font-size:14.5px;color:rgba(255,255,255,.66);margin:0 0 10px}
.contact-line b{color:#fff;font-weight:600;margin-right:6px}
.footer-bottom{
  margin-top:44px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:36px;height:36px;border-radius:10px;border:1px solid rgba(255,255,255,.24);
  display:flex;align-items:center;justify-content:center;
}
.footer-social svg{width:17px;height:17px;fill:none;stroke:rgba(255,255,255,.7);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.footer-social a:hover{border-color:var(--clay)}
.footer-social a:hover svg{stroke:var(--clay)}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:55;
  display:none;align-items:center;gap:10px;padding:14px 24px;border-radius:999px;
  background:var(--clay);color:#fff;font-weight:600;font-size:15px;
  box-shadow:0 12px 28px -12px rgba(169,79,33,.6);
  opacity:0;transform:translateY(10px);transition:opacity .3s ease,transform .3s ease,background .22s ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0)}
.float-cta:hover{background:var(--clay-700);color:#fff}
@media(min-width:1024px){.float-cta{display:inline-flex}}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
@media(max-width:520px){
  .article-head{padding-top:112px}
  .paper-sheet{padding:24px 18px}
  .article-body{font-size:16px}
}

/* roulang page: category2 */
:root{
  --ink:#1E4B45;
  --ink-900:#163832;
  --ink-100:#E3EDEA;
  --clay:#C9642F;
  --clay-700:#A94F21;
  --mist:#8FB3A9;
  --paper:#F7F6F3;
  --paper-2:#EFEEE9;
  --night:#101C1A;
  --t1:#17201E;
  --t2:#5C6A66;
  --t3:#8B9794;
  --line:#E0DED6;
  --r-card:20px;
  --r-img:14px;
  --r-btn:10px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(16,28,26,.06);
  --sh-2:0 12px 32px -12px rgba(16,28,26,.18);
  --font-serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --font-sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;scroll-padding-bottom:96px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--t1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--t1);margin:0;font-weight:700;line-height:1.25;}
p{margin:0 0 1rem;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--clay);}
button{font-family:inherit;cursor:pointer;}
::selection{background:var(--ink-100);color:var(--ink-900);}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--ink);outline-offset:3px;border-radius:6px;
}
.section--night a:focus-visible,.site-header:not(.is-solid) a:focus-visible,
.page-hero a:focus-visible,.page-hero button:focus-visible{outline-color:#fff;}

/* ---------- Foundation 覆盖 ---------- */
body,html{font-family:var(--font-sans);}
.button,button.button,.button.primary,.button.secondary{
  background:none;border:0;box-shadow:none;margin:0;padding:0;
  font-family:var(--font-sans);color:inherit;
}
.button:hover,.button:focus{background:none;}
.grid-padding-x{margin-left:-12px;margin-right:-12px;}
.grid-padding-x>.cell{padding-left:12px;padding-right:12px;}
.grid-x{flex-wrap:wrap;}
.accordion,.callout{background:none;border:0;margin:0;padding:0;}
a{color:var(--ink);}
a:hover,a:focus{color:var(--clay);}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){.container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.container{padding-left:48px;padding-right:48px;}}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--clay);
  margin-bottom:14px;
}
.section{padding:80px 0;}
@media (min-width:1024px){.section{padding:120px 0;}}
.section--paper2{background:var(--paper-2);}
.section--night{background:var(--night);color:rgba(255,255,255,.82);}
.section--night h2,.section--night h3{color:#fff;}
.section--night p{color:rgba(255,255,255,.72);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{font-size:clamp(1.6rem,3.4vw,2.4rem);line-height:1.2;}
.section-head p{margin-top:14px;color:var(--t2);font-size:16px;}
.section--night .section-head p{color:rgba(255,255,255,.68);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background .25s ease,color .25s ease,transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  white-space:nowrap;
}
.btn--primary{background:var(--clay);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:var(--clay-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn--ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px);}
.btn--light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent;}
.btn--light:hover{background:#fff;color:var(--ink);transform:translateY(-1px);}
.btn--sm{padding:10px 18px;font-size:14px;}
.btn__arrow{font-family:var(--font-mono);font-size:13px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--header-h);
  display:flex;align-items:center;
  background:transparent;
  transition:height .3s ease,background .3s ease,box-shadow .3s ease,border-color .3s ease;
  border-bottom:1px solid transparent;
}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:28px;width:100%;}
.logo{display:inline-flex;align-items:center;gap:12px;}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  border:1px solid currentColor;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  color:inherit;
}
.logo-mark svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linejoin:round;stroke-linecap:round;}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-text .l1{font-size:15px;font-weight:700;letter-spacing:.06em;font-family:var(--font-sans);}
.logo-text .l2{font-size:13px;font-weight:700;font-family:var(--font-sans);letter-spacing:.02em;}
.site-header .logo{color:#fff;}
.site-header .logo:hover{color:#fff;}
.site-header.is-solid .logo,.site-header.is-solid .logo:hover{color:var(--ink);}

.nav-right{display:flex;align-items:center;gap:28px;}
.nav-links{display:none;gap:26px;align-items:center;}
.nav-links a{
  position:relative;
  font-size:15px;
  color:rgba(255,255,255,.8);
  padding:6px 0;
  font-weight:500;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .28s cubic-bezier(.22,.61,.36,1);
}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:#fff;}
.nav-links a.is-active::after{transform:scaleX(1);}
.site-header.is-solid .nav-links a{color:var(--t2);}
.site-header.is-solid .nav-links a:hover{color:var(--ink);}
.site-header.is-solid .nav-links a.is-active{color:var(--ink);}
.site-header.is-solid{
  background:rgba(247,246,243,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
}
.site-header.is-scrolled{height:60px;}
.site-header.is-solid .nav-toggle span{background:var(--ink);}
.nav-cta{display:none;}
@media (min-width:1024px){
  .nav-links{display:flex;}
  .nav-cta{display:inline-flex;}
}
.nav-toggle{
  width:44px;height:44px;border:0;background:transparent;
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  padding:0 10px;
}
.nav-toggle span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform .24s ease,opacity .24s ease,background .3s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (min-width:1024px){.nav-toggle{display:none;}}

.drawer{
  position:fixed;inset:0;z-index:79;
  background:var(--night);
  padding:104px 28px 40px;
  display:flex;flex-direction:column;gap:8px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer a{
  color:rgba(255,255,255,.86);
  font-size:20px;font-weight:600;
  padding:16px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.drawer a.is-active{color:#fff;}
.drawer .drawer-cta{margin-top:24px;border:0;}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;
  padding:150px 0 72px;
  overflow:hidden;
  background:var(--ink-900);
}
@media (min-width:1024px){.page-hero{padding:190px 0 96px;}}
.page-hero__media{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  filter:saturate(.72);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(16,28,26,.78) 0%,rgba(22,56,50,.86) 60%,rgba(16,28,26,.94) 100%);
}
.page-hero__inner{position:relative;z-index:2;color:#fff;max-width:860px;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;color:rgba(255,255,255,.62);
  margin-bottom:22px;
}
.breadcrumb a{color:rgba(255,255,255,.78);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{opacity:.5;}
.page-hero .eyebrow{color:var(--mist);}
.page-hero h1{
  color:#fff;
  font-size:clamp(2rem,5vw,3.4rem);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  max-width:16em;
}
.page-hero__sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.78);
  max-width:36em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:34px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.18);
}
.hero-tags li{
  font-size:13px;color:rgba(255,255,255,.74);
  padding:6px 14px;border:1px solid rgba(255,255,255,.22);border-radius:999px;
}
.count-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:8px 14px;border-radius:var(--r-badge);
  background:var(--ink-100);color:var(--ink-900);
  border:1px solid rgba(30,75,69,.18);
}

/* ---------- 基础检查清单 ---------- */
.split{row-gap:40px;}
.sticky-title{position:static;}
@media (min-width:1024px){
  .sticky-title{position:sticky;top:104px;}
}
.sticky-title h2{font-size:clamp(1.5rem,3vw,2.1rem);}
.sticky-title p{color:var(--t2);font-size:15.5px;margin-top:16px;}
.num-list li{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:26px 0;
  border-top:1px solid var(--line);
  transition:transform .3s ease;
}
.num-list li:last-child{border-bottom:1px solid var(--line);}
.num-list .num{
  font-family:var(--font-mono);font-size:26px;font-weight:600;
  color:var(--mist);line-height:1.2;
  transition:color .3s ease;
}
.num-list h3{font-size:1.16rem;font-weight:600;margin-bottom:8px;}
.num-list p{color:var(--t2);font-size:15.5px;margin:0;}
@media (hover:hover){
  .num-list li:hover{transform:translateX(6px);}
  .num-list li:hover .num{color:var(--clay);}
}

/* ---------- 场景卡片 ---------- */
.scene-grid{row-gap:28px;align-items:stretch;}
.scene-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(30,75,69,.3);}
.scene-card__media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper-2);}
.scene-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.22,.61,.36,1);}
.scene-card:hover .scene-card__media img{transform:scale(1.03);}
.scene-card__body{padding:26px 26px 30px;}
.scene-card__body h3{font-size:1.18rem;margin-bottom:10px;}
.scene-card__body p{color:var(--t2);font-size:15.5px;margin:0;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  font-size:13px;color:var(--ink-900);
  background:var(--ink-100);
  padding:6px 13px;border-radius:var(--r-badge);
  border:1px solid rgba(30,75,69,.14);
}

/* ---------- 排查流程 ---------- */
.flow{position:relative;row-gap:28px;}
.flow-step{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px 26px;
  box-shadow:var(--sh-1);
  height:100%;
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(30,75,69,.3);}
.flow-step .step-num{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--clay);display:block;margin-bottom:14px;
}
.flow-step h3{font-size:1.08rem;margin-bottom:10px;}
.flow-step p{color:var(--t2);font-size:15px;margin:0;}
.flow-note{
  margin-top:36px;padding:22px 24px;
  border:1px dashed var(--line);border-radius:16px;
  color:var(--t2);font-size:15px;background:rgba(255,255,255,.5);
}

/* ---------- 深色区 对照 ---------- */
.compare{row-gap:28px;margin-top:8px;}
.compare-col{
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-card);
  padding:30px 26px;
  background:rgba(255,255,255,.03);
}
.compare-col.is-good{border-color:rgba(143,179,169,.45);}
.compare-col h3{font-size:1.05rem;margin-bottom:18px;display:flex;align-items:center;gap:10px;}
.compare-col h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--mist);flex:0 0 8px;}
.compare-col.is-warn h3 .dot{background:var(--clay);}
.compare-col li{
  display:flex;gap:12px;
  padding:12px 0;
  border-bottom:1px solid rgba(255,255,255,.1);
  font-size:15px;color:rgba(255,255,255,.78);
}
.compare-col li:last-child{border-bottom:0;}
.compare-col li .idx{font-family:var(--font-mono);font-size:12px;color:var(--mist);padding-top:4px;}
.compare-col.is-warn li .idx{color:var(--clay);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:24px 0;text-align:left;
  font-size:17px;font-weight:600;color:var(--t1);line-height:1.6;
  font-family:var(--font-sans);
  transition:color .25s ease;
}
.faq-q:hover{color:var(--ink);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;margin-top:4px;
  transition:transform .26s cubic-bezier(.22,.61,.36,1);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--clay);border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:10px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:10px;width:2px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s ease;
}
.faq-a p{
  margin:0 0 24px;
  padding-right:42px;
  font-size:15px;line-height:1.85;color:var(--t2);
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink);
  border-radius:24px;
  padding:44px 28px;
  display:flex;flex-direction:column;gap:26px;
  align-items:flex-start;
}
@media (min-width:768px){
  .cta-band{padding:56px;flex-direction:row;align-items:center;justify-content:space-between;gap:40px;}
}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,2.6vw,1.9rem);max-width:22em;}
.cta-band p{color:rgba(255,255,255,.72);margin-top:12px;font-size:15.5px;max-width:34em;}
.cta-band .btn{flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--paper-2);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  margin-top:0;
}
.footer-grid{row-gap:36px;}
.footer-brand .logo{color:var(--ink);margin-bottom:16px;}
.footer-brand p{color:var(--t2);font-size:15px;max-width:30em;margin:0;}
.footer-col h4{
  font-size:14px;font-family:var(--font-sans);font-weight:700;
  letter-spacing:.04em;color:var(--t1);margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{color:var(--t2);font-size:15px;}
.footer-col ul a:hover{color:var(--ink);}
.contact-line{color:var(--t2);font-size:15px;margin-bottom:8px;}
.contact-line b{color:var(--t1);font-weight:600;margin-right:6px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  color:var(--t3);font-size:13px;letter-spacing:.04em;
}
.footer-social{display:flex;gap:12px;}
.footer-social a{
  width:34px;height:34px;border:1px solid var(--line);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--t2);
  transition:color .25s ease,border-color .25s ease,transform .25s ease;
}
.footer-social a:hover{color:var(--ink);border-color:var(--ink);transform:translateY(-2px);}
.footer-social svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:999px;
  background:var(--clay);color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,background .25s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--clay-700);color:#fff;transform:translateY(-1px);}
@media (max-width:768px){
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    justify-content:center;height:56px;padding:0;
    padding-bottom:env(safe-area-inset-bottom);
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  body{padding-bottom:56px;}
}

/* ---------- 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.06s;}
.reveal.d2{transition-delay:.12s;}
.reveal.d3{transition-delay:.18s;}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  .num-list li:hover,.scene-card:hover,.flow-step:hover,.btn:hover{transform:none;}
  .scene-card:hover .scene-card__media img{transform:none;}
}

@media (max-width:520px){
  body{font-size:16px;}
  .page-hero{padding-top:132px;}
  .num-list li{grid-template-columns:48px 1fr;gap:14px;}
  .num-list .num{font-size:20px;}
  .scene-card__body,.flow-step,.compare-col{padding:24px 20px;}
  .cta-band{padding:32px 22px;border-radius:20px;}
  .footer-bottom{font-size:12px;}
}