/* roulang page: index */
:root{
  --primary:#FF6A1A; --primary-dark:#E2520A; --primary-soft:#FFF0E4;
  --accent:#0EA5A0; --accent-soft:#E4F5F3;
  --ink:#102B2E; --ink-deep:#0A1E21;
  --bg:#FFFAF5; --bg-alt:#F6F3EE; --surface:#FFFFFF; --line:#E9E1D8;
  --text:#2C3839; --muted:#6B7F80; --white-soft:#F7FBF9; --lime:#B8E63C;
  --radius-card:22px; --radius-field:14px; --radius-img:16px;
  --shadow-s:0 2px 8px rgba(16,43,46,.06);
  --shadow-m:0 10px 30px -12px rgba(16,43,46,.18);
  --shadow-l:0 24px 60px -24px rgba(16,43,46,.28);
  --font-cn:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--font-cn); font-size:16px; line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
button{font-family:inherit; cursor:pointer; border:0; background:none;}
input{font-family:inherit;}
h1,h2,h3,h4{margin:0; color:var(--ink); font-weight:700;}
p{margin:0;}
ul,ol{margin:0; padding:0; list-style:none;}
.num{font-variant-numeric:tabular-nums;}

.shell{max-width:1200px; margin:0 auto; padding:0 20px;}
@media (min-width:768px){ .shell{padding:0 32px;} }
@media (min-width:1280px){ .shell{max-width:1240px;} }

.section{padding:56px 0;}
@media (min-width:768px){ .section{padding:72px 0;} }
@media (min-width:1024px){ .section{padding:96px 0;} }
.section-alt{background:var(--bg-alt);}
.section-ink{background:var(--ink); color:var(--white-soft);}
.section-ink h2,.section-ink h3{color:#fff;}

.sec-head{max-width:760px; margin-bottom:36px;}
.sec-eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:13px; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color:var(--primary-dark); background:var(--primary-soft);
  padding:6px 14px; border-radius:999px; margin-bottom:16px;
}
.sec-eyebrow.cyan{color:#0B7E7A; background:var(--accent-soft);}
.sec-title{font-size:clamp(24px,3.4vw,38px); line-height:1.25; font-weight:800; letter-spacing:-.01em;}
.sec-sub{margin-top:14px; color:var(--muted); font-size:16px; max-width:660px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:52px; padding:0 26px; border-radius:999px;
  font-size:15px; font-weight:600; letter-spacing:.01em;
  transition:transform .22s ease, box-shadow .22s ease, background-color .22s ease, color .22s ease, border-color .22s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--primary); outline-offset:2px;}
.btn-primary{background:var(--primary); color:#fff; box-shadow:var(--shadow-m);}
.btn-primary:hover{background:var(--primary-dark); transform:translateY(-2px); box-shadow:var(--shadow-l);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border:1px solid rgba(255,255,255,.42); color:#fff; background:rgba(255,255,255,.06);}
.btn-ghost:hover{background:rgba(255,255,255,.14); transform:translateY(-2px);}
.btn-outline{border:1px solid var(--line); color:var(--ink); background:#fff; box-shadow:var(--shadow-s);}
.btn-outline:hover{border-color:var(--primary); color:var(--primary-dark); transform:translateY(-2px); box-shadow:var(--shadow-m);}
.btn-sm{height:42px; padding:0 20px; font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex; align-items:center; gap:6px;
  font-size:12px; font-weight:600; padding:4px 10px; border-radius:999px;
  background:var(--primary-soft); color:var(--primary-dark);
}
.badge-accent{background:var(--accent-soft); color:#0B7E7A;}
.badge-lime{background:rgba(184,230,60,.28); color:#4B6B00;}
.chip{
  display:inline-flex; align-items:center; gap:6px;
  padding:8px 16px; border-radius:999px; border:1px solid var(--line);
  background:#fff; font-size:14px; color:var(--muted); transition:all .2s ease;
}
.chip:hover{border-color:var(--primary); color:var(--primary-dark);}
.chip.is-on{background:var(--ink); border-color:var(--ink); color:#fff;}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-card);
  box-shadow:var(--shadow-s); transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover{transform:translateY(-4px); box-shadow:var(--shadow-m); border-color:#DED3C6;}
.card-img{aspect-ratio:16/9; overflow:hidden; border-radius:var(--radius-img); background:var(--ink);}
.card-img img{width:100%; height:100%; object-fit:cover; transition:transform .35s ease;}
.card:hover .card-img img{transform:scale(1.04);}
.clamp-2{display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;}
.clamp-3{display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden;}

/* ---------- 导航 ---------- */
.site-header{position:fixed; top:0; left:0; right:0; z-index:60; padding:18px 16px 0; transition:padding .3s ease;}
.nav-shell{
  max-width:1240px; margin:0 auto; border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  box-shadow:0 10px 30px -12px rgba(16,43,46,.35);
  transition:background .3s ease, border-radius .3s ease, box-shadow .3s ease, border-color .3s ease, max-width .3s ease;
}
.site-header.scrolled{padding:0;}
.site-header.scrolled .nav-shell{
  max-width:100%; border-radius:0; border-color:transparent;
  background:rgba(255,250,245,.94);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 8px rgba(16,43,46,.06);
}
.nav-inner{display:flex; align-items:center; justify-content:space-between; gap:16px; height:72px; transition:height .3s ease;}
.site-header.scrolled .nav-inner{height:60px;}
.brand{display:inline-flex; align-items:center; gap:10px; flex-shrink:0;}
.brand-mark{
  width:34px; height:34px; border-radius:11px; background:var(--primary);
  display:flex; align-items:center; justify-content:center; box-shadow:0 6px 16px -8px rgba(226,82,10,.9);
}
.brand-mark svg{width:18px; height:18px;}
.brand-text{font-size:18px; font-weight:800; letter-spacing:-.01em; color:#fff; transition:color .3s ease;}
.site-header.scrolled .brand-text{color:var(--ink);}
.nav-links{display:none; align-items:center; gap:6px;}
@media (min-width:1024px){ .nav-links{display:flex;} }
.nav-link{
  position:relative; padding:9px 16px; border-radius:999px;
  font-size:15px; font-weight:600; color:rgba(247,251,249,.86);
  transition:color .2s ease, background-color .2s ease;
}
.nav-link:hover{color:#fff; background:rgba(255,255,255,.12);}
.site-header.scrolled .nav-link{color:var(--muted);}
.site-header.scrolled .nav-link:hover{color:var(--ink); background:var(--bg-alt);}
.nav-link.active{color:#fff;}
.nav-link.active::after{
  content:''; position:absolute; left:16px; right:16px; bottom:2px; height:3px;
  border-radius:999px; background:var(--primary);
}
.site-header.scrolled .nav-link.active{color:var(--ink);}
.nav-right{display:flex; align-items:center; gap:10px;}
.hamburger{
  width:42px; height:42px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  border:1px solid rgba(255,255,255,.35); color:#fff; transition:all .2s ease;
}
.site-header.scrolled .hamburger{border-color:var(--line); color:var(--ink); background:#fff;}
@media (min-width:1024px){ .hamburger{display:none;} }

.drawer-mask{
  position:fixed; inset:0; background:rgba(10,30,33,.62); z-index:70;
  opacity:0; visibility:hidden; transition:opacity .28s ease, visibility .28s ease;
}
.drawer-mask.open{opacity:1; visibility:visible;}
.drawer{
  position:fixed; top:0; right:0; bottom:0; width:min(320px,86vw); z-index:71;
  background:var(--ink); color:var(--white-soft); padding:24px 22px 28px;
  transform:translateX(100%); transition:transform .3s ease;
  display:flex; flex-direction:column;
}
.drawer.open{transform:translateX(0);}
.drawer-link{
  display:block; padding:14px 4px; font-size:16px; font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.1); color:var(--white-soft);
}
.drawer-link.active{color:var(--primary);}
.drawer-foot{margin-top:auto; padding-top:20px;}

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden; background:var(--ink); color:var(--white-soft);
  padding:132px 0 78px;
}
@media (min-width:1024px){ .hero{padding:170px 0 110px;} }
.hero-bg{
  position:absolute; inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover; background-position:center;
  opacity:.28;
}
.hero-glow{
  position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(560px 420px at 8% -6%, rgba(255,106,26,.42), transparent 68%),
    radial-gradient(520px 480px at 96% 18%, rgba(14,165,160,.34), transparent 70%);
}
.hero-dots{
  position:absolute; inset:0; opacity:.08; pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px, transparent 1px);
  background-size:22px 22px;
}
.hero-mask{position:absolute; inset:0; background:linear-gradient(105deg, rgba(10,30,33,.94) 0%, rgba(10,30,33,.78) 48%, rgba(10,30,33,.62) 100%);}
.hero-grid{position:relative; display:grid; gap:48px; align-items:center;}
@media (min-width:1024px){ .hero-grid{grid-template-columns:1.05fr .95fr; gap:56px;} }
.hero-copy{max-width:620px;}
.hero-tag{
  display:inline-flex; align-items:center; gap:8px; padding:7px 15px; border-radius:999px;
  background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.2);
  font-size:13px; color:var(--white-soft); margin-bottom:22px;
}
.hero-tag i{width:7px; height:7px; border-radius:999px; background:var(--lime); display:inline-block;}
.hero h1{
  color:#fff; font-size:clamp(30px,5vw,54px); line-height:1.16; font-weight:800; letter-spacing:-.01em;
}
.hero h1 em{font-style:normal; color:var(--primary);}
.hero-sub{margin-top:20px; font-size:17px; line-height:1.85; color:rgba(247,251,249,.78); max-width:520px;}
.hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:32px;}
.hero-stats{display:flex; flex-wrap:wrap; gap:32px; margin-top:44px; padding-top:26px; border-top:1px solid rgba(255,255,255,.12);}
.hero-stat-num{font-size:24px; font-weight:800; color:#fff;}
.hero-stat-label{font-size:13px; color:rgba(247,251,249,.62);}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%; border-radius:20px; border:1px solid rgba(255,255,255,.16);
  transform:rotate(-2.4deg);
  box-shadow:0 30px 70px -20px rgba(255,106,26,.55), 0 20px 50px -24px rgba(0,0,0,.6);
}
.hero-visual::after{
  content:''; position:absolute; inset:-18px -14px auto auto; width:120px; height:120px; border-radius:50%;
  background:radial-gradient(circle, rgba(184,230,60,.5), transparent 68%); filter:blur(6px); z-index:-1;
}

/* ---------- 价值主张条 ---------- */
.value-strip{display:flex; flex-wrap:wrap; gap:20px;}
.value-item{
  flex:1 1 220px; padding:24px; border-radius:var(--radius-card);
  background:#fff; border:1px solid var(--line); box-shadow:var(--shadow-s);
  transition:transform .22s ease, box-shadow .22s ease;
}
.value-item:hover{transform:translateY(-4px); box-shadow:var(--shadow-m);}
.value-item.grow{flex:1.5 1 320px; background:linear-gradient(160deg,#FFF6EE,#FFFFFF 60%); border-color:#F6DCC6;}
.value-icon{
  width:44px; height:44px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  background:var(--accent-soft); color:#0B7E7A; margin-bottom:16px;
}
.value-item.grow .value-icon{background:var(--primary-soft); color:var(--primary-dark);}
.value-item h3{font-size:19px; margin-bottom:8px;}
.value-item p{font-size:14.5px; color:var(--muted); line-height:1.8;}

/* ---------- 图文交替 ---------- */
.feature-row{display:grid; gap:36px; align-items:center; margin-bottom:56px;}
.feature-row:last-child{margin-bottom:0;}
@media (min-width:1024px){ .feature-row{grid-template-columns:1fr 1fr; gap:64px;} .feature-row.reverse .feature-media{order:-1;} }
.feature-media{position:relative;}
.feature-media img{border-radius:var(--radius-card); box-shadow:var(--shadow-l); border:1px solid var(--line);}
.feature-media .tag-float{
  position:absolute; left:-14px; bottom:-14px; background:#fff; border:1px solid var(--line);
  border-radius:16px; padding:12px 18px; box-shadow:var(--shadow-m);
}
.feature-media .tag-float strong{display:block; font-size:20px; color:var(--primary-dark);}
.feature-media .tag-float span{font-size:12.5px; color:var(--muted);}
.feature-list{margin-top:22px; display:grid; gap:12px;}
.feature-list li{display:flex; gap:12px; font-size:15px; color:var(--muted);}
.feature-list li b{color:var(--ink); font-weight:600;}
.feature-list li::before{
  content:''; flex:0 0 8px; width:8px; height:8px; margin-top:11px;
  border-radius:3px; background:var(--accent);
}

/* ---------- 截图轮播 ---------- */
.track-wrap{position:relative;}
.track{
  display:flex; gap:20px; overflow-x:auto; scroll-snap-type:x mandatory;
  padding:6px 2px 18px; scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none;}
.slide{flex:0 0 78%; scroll-snap-align:start;}
@media (min-width:640px){ .slide{flex:0 0 48%;} }
@media (min-width:1024px){ .slide{flex:0 0 31.5%;} }
.slide-inner{background:#fff; border:1px solid var(--line); border-radius:var(--radius-card); overflow:hidden; box-shadow:var(--shadow-s); transition:transform .22s ease, box-shadow .22s ease;}
.slide-inner:hover{transform:translateY(-4px); box-shadow:var(--shadow-m);}
.slide-inner img{width:100%; aspect-ratio:16/10; object-fit:cover;}
.slide-cap{padding:16px 18px 20px;}
.slide-cap h3{font-size:17px; margin-bottom:6px;}
.slide-cap p{font-size:14px; color:var(--muted); line-height:1.75;}
.track-nav{display:flex; align-items:center; justify-content:space-between; gap:16px; margin-top:6px;}
.track-dots{display:flex; align-items:center; gap:8px;}
.dash{width:26px; height:4px; border-radius:999px; background:var(--line); transition:all .25s ease;}
.dash.on{width:44px; background:var(--primary);}
.round-btn{
  width:48px; height:48px; border-radius:999px; background:#fff; border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; color:var(--ink);
  box-shadow:var(--shadow-s); transition:all .2s ease;
}
.round-btn:hover{background:var(--primary); border-color:var(--primary); color:#fff; transform:translateY(-2px);}
.round-btn:focus-visible{outline:2px solid var(--primary); outline-offset:2px;}

/* ---------- 系统要求 ---------- */
.req-grid{display:grid; gap:24px;}
@media (min-width:900px){ .req-grid{grid-template-columns:1fr 1fr; gap:28px;} }
.req-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius-card); padding:26px; box-shadow:var(--shadow-s);}
.req-card h3{font-size:20px; display:flex; align-items:center; gap:10px; margin-bottom:18px;}
.req-row{display:flex; align-items:center; justify-content:space-between; gap:16px; padding:14px 0; border-bottom:1px solid var(--line);}
.req-row:last-child{border-bottom:0; padding-bottom:0;}
.req-key{font-size:14.5px; color:var(--muted);}
.req-val{font-size:15px; font-weight:600; color:var(--ink); font-variant-numeric:tabular-nums;}
.req-pill{
  display:inline-block; padding:4px 12px; border-radius:999px; background:var(--accent-soft);
  color:#0B7E7A; font-size:13.5px; font-weight:600;
}
.req-pill.orange{background:var(--primary-soft); color:var(--primary-dark);}

/* ---------- 评价墙 ---------- */
.review-grid{display:grid; gap:22px;}
@media (min-width:768px){ .review-grid{grid-template-columns:repeat(3,1fr);} }
.review-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius-card); padding:24px; box-shadow:var(--shadow-s); transition:transform .22s ease, box-shadow .22s ease;}
.review-card:hover{transform:translateY(-4px); box-shadow:var(--shadow-m);}
@media (min-width:768px){
  .review-card:nth-child(2){transform:translateY(-12px);}
  .review-card:nth-child(2):hover{transform:translateY(-16px);}
  .review-card:nth-child(3){transform:translateY(10px);}
  .review-card:nth-child(3):hover{transform:translateY(6px);}
}
.review-top{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:14px;}
.review-user{display:flex; align-items:center; gap:10px;}
.avatar{
  width:40px; height:40px; border-radius:999px; display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:15px; color:#fff; background:var(--accent);
}
.avatar.o{background:var(--primary);}
.avatar.d{background:var(--ink);}
.review-name{font-size:15px; font-weight:600; color:var(--ink);}
.review-meta{font-size:12.5px; color:var(--muted);}
.stars{color:var(--lime); font-size:13px; letter-spacing:2px;}
.review-card p{font-size:14.5px; color:var(--muted); line-height:1.85;}

/* ---------- 下载区 ---------- */
.dl-wrap{
  background:var(--ink); color:var(--white-soft); border-radius:28px; padding:36px 26px;
  position:relative; overflow:hidden;
}
@media (min-width:768px){ .dl-wrap{padding:48px 44px;} }
.dl-bg{
  position:absolute; inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover; background-position:center; opacity:.18;
}
.dl-inner{position:relative; display:grid; gap:34px;}
@media (min-width:1024px){ .dl-inner{grid-template-columns:1.15fr .85fr; align-items:center; gap:48px;} }
.dl-main{display:flex; flex-wrap:wrap; align-items:center; gap:20px;}
.dl-big{
  display:inline-flex; align-items:center; gap:14px; height:66px; padding:0 32px; border-radius:999px;
  background:var(--primary); color:#fff; box-shadow:0 20px 46px -20px rgba(255,106,26,.95);
  transition:all .22s ease;
}
.dl-big:hover{background:var(--primary-dark); transform:translateY(-2px);}
.dl-big small{display:block; font-size:12.5px; opacity:.85; font-weight:500; line-height:1.4;}
.dl-big strong{display:block; font-size:16px; font-weight:700; line-height:1.5;}
.qr{
  width:100px; height:100px; border-radius:16px; background:#fff; border:1px solid rgba(255,255,255,.4);
  display:grid; grid-template-columns:repeat(4,1fr); gap:5px; padding:12px;
}
.qr span{border-radius:3px; background:var(--ink);}
.qr span:nth-child(3n){background:var(--primary);}
.dl-alt{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px;}
.dl-alt .btn{height:48px; font-size:14px; border:1px solid rgba(255,255,255,.3); color:#fff; background:rgba(255,255,255,.06);}
.dl-alt .btn:hover{background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.55);}
.dl-note{margin-top:18px; font-size:13px; color:rgba(247,251,249,.6); font-variant-numeric:tabular-nums;}
.dl-side{background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12); border-radius:var(--radius-card); padding:24px;}
.dl-side h3{font-size:18px; margin-bottom:14px;}
.dl-side li{display:flex; justify-content:space-between; gap:14px; padding:11px 0; border-bottom:1px solid rgba(255,255,255,.1); font-size:14px;}
.dl-side li:last-child{border-bottom:0;}
.dl-side li span:first-child{color:rgba(247,251,249,.66);}
.dl-side li span:last-child{font-weight:600; font-variant-numeric:tabular-nums;}

/* ---------- CMS 列表 ---------- */
.posts-head{display:flex; align-items:flex-end; justify-content:space-between; gap:20px; flex-wrap:wrap; margin-bottom:32px;}
.posts-more{font-size:14.5px; font-weight:600; color:var(--primary-dark); position:relative;}
.posts-more::after{
  content:''; position:absolute; left:0; bottom:-4px; height:2px; width:0; background:var(--primary); transition:width .25s ease;
}
.posts-more:hover::after{width:100%;}
.posts-grid{display:grid; gap:22px;}
@media (min-width:640px){ .posts-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .posts-grid{grid-template-columns:repeat(3,1fr);} }
.post-card{display:flex; flex-direction:column; height:100%; padding:16px;}
.post-body{display:flex; flex-direction:column; flex:1; padding:16px 6px 6px;}
.post-title{font-size:17px; line-height:1.55; margin:10px 0 8px; font-weight:700;}
.post-card:hover .post-title{color:var(--primary-dark);}
.post-excerpt{font-size:14px; color:var(--muted); line-height:1.8;}
.post-foot{margin-top:auto; padding-top:14px; display:flex; align-items:center; justify-content:space-between; gap:12px; font-size:12.5px; color:var(--muted);}
.empty-state{
  grid-column:1/-1; text-align:center; padding:60px 24px; border:1px dashed var(--line);
  border-radius:var(--radius-card); background:#fff;
}
.empty-state p{color:var(--muted); font-size:15px; margin:14px 0 20px;}
.empty-icon{
  width:56px; height:56px; margin:0 auto; border-radius:18px; background:var(--bg-alt);
  display:flex; align-items:center; justify-content:center; color:var(--muted);
}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px; margin:0 auto; display:grid; gap:12px;}
.faq-item{background:#fff; border:1px solid var(--line); border-radius:18px; overflow:hidden; transition:border-color .2s ease, box-shadow .2s ease;}
.faq-item[open]{border-color:#F6DCC6; box-shadow:var(--shadow-s);}
.faq-item summary{
  list-style:none; cursor:pointer; padding:20px 22px; display:flex; align-items:center; justify-content:space-between; gap:16px;
  font-size:16px; font-weight:600; color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:'+'; flex:0 0 auto; font-size:24px; line-height:1; color:var(--primary);
  transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .faq-a{padding:0 22px 20px; color:var(--muted); font-size:14.5px; line-height:1.9;}

/* ---------- 底部 CTA ---------- */
.cta-band{position:relative; overflow:hidden; background:var(--ink); color:var(--white-soft); text-align:center; padding:72px 0;}
@media (min-width:1024px){ .cta-band{padding:96px 0;} }
.cta-band .cta-bg{
  position:absolute; inset:0; background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover; background-position:center; opacity:.3;
}
.cta-band .cta-mask{position:absolute; inset:0; background:linear-gradient(180deg, rgba(10,30,33,.86), rgba(10,30,33,.94));}
.cta-band .cta-inner{position:relative; max-width:720px; margin:0 auto;}
.cta-band h2{font-size:clamp(26px,3.6vw,40px); color:#fff; line-height:1.25;}
.cta-band p{margin-top:16px; color:rgba(247,251,249,.76); font-size:16px;}
.cta-actions{display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:30px;}
.cta-form{display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:26px;}
.cta-form input{
  flex:1 1 260px; max-width:340px; height:52px; padding:0 18px; border-radius:var(--radius-field);
  border:1px solid rgba(255,255,255,.28); background:rgba(255,255,255,.1); color:#fff; font-size:15px;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.cta-form input::placeholder{color:rgba(247,251,249,.55);}
.cta-form input:focus{outline:none; border-color:var(--primary); box-shadow:0 0 0 3px rgba(255,106,26,.25);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-deep); color:rgba(247,251,249,.72); padding:64px 0 0; border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{display:grid; gap:36px; padding-bottom:44px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr; gap:44px;} }
.footer-brand{display:flex; align-items:center; gap:10px; margin-bottom:16px;}
.footer-brand .brand-text{color:#fff; font-size:18px; font-weight:800;}
.footer-brand .brand-mark{width:32px; height:32px; border-radius:10px;}
.footer-col h4{color:#fff; font-size:14px; font-weight:600; margin-bottom:16px; letter-spacing:.02em;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px; color:rgba(247,251,249,.72); transition:color .2s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-desc{font-size:14px; line-height:1.9; max-width:320px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08); padding:20px 0;
  display:flex; flex-wrap:wrap; gap:12px; align-items:center; justify-content:space-between;
  font-size:13px; color:rgba(247,251,249,.56);
}

/* ---------- 回顶 ---------- */
.to-top{
  position:fixed; right:22px; bottom:22px; width:52px; height:52px; border-radius:999px;
  background:var(--primary); color:#fff; display:flex; align-items:center; justify-content:center;
  box-shadow:var(--shadow-l); opacity:0; visibility:hidden; transform:translateY(10px);
  transition:all .28s ease; z-index:55;
}
.to-top.show{opacity:1; visibility:visible; transform:translateY(0);}
.to-top:hover{background:var(--primary-dark);}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease;}
.reveal.in{opacity:1; transform:none;}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important; animation:none !important;}
  .reveal{opacity:1; transform:none;}
}

/* roulang page: category1 */
:root{
  --primary:#FF6A1A;
  --primary-deep:#E2520A;
  --primary-soft:#FFF0E4;
  --accent:#0EA5A0;
  --accent-soft:#E4F5F3;
  --ink:#102B2E;
  --ink-2:#0A1E21;
  --bg:#FFFAF5;
  --bg-alt:#F6F3EE;
  --surface:#FFFFFF;
  --line:#E9E1D8;
  --text:#2C3839;
  --muted:#6B7F80;
  --invert:#F7FBF9;
  --lime:#B8E63C;
  --radius-card:22px;
  --radius-field:14px;
  --shadow-s:0 2px 8px rgba(16,43,46,.06);
  --shadow-m:0 10px 30px -12px rgba(16,43,46,.18);
  --shadow-l:0 24px 60px -24px rgba(16,43,46,.28);
  --font:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0}

.shell{max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{position:fixed;top:12px;left:0;right:0;z-index:60;padding:0 16px;transition:top .25s ease,padding .25s ease}
.header-inner{
  display:flex;align-items:center;gap:22px;
  width:100%;max-width:1240px;margin:0 auto;height:72px;padding:0 22px;
  border-radius:999px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  box-shadow:0 14px 34px -22px rgba(10,30,33,.6);
  transition:height .25s ease,background .25s ease,border-color .25s ease,border-radius .25s ease,box-shadow .25s ease;
}
.site-header.is-stuck{top:0;padding:0}
.site-header.is-stuck .header-inner{
  max-width:100%;height:60px;border-radius:0;
  background:rgba(255,250,245,.94);
  border:0;border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-s);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px -10px rgba(255,106,26,.9);flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:19px;font-weight:800;color:#fff;letter-spacing:-.01em;transition:color .25s ease}
.site-header.is-stuck .brand-text{color:var(--ink)}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:9px 15px;font-size:15px;font-weight:500;
  color:rgba(255,255,255,.86);border-radius:999px;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:0;height:3px;border-radius:999px;background:var(--primary);transition:width .22s ease;
}
.nav-link:hover{color:#fff}
.nav-link:hover::after{width:20px}
.nav-link.active{color:#fff;font-weight:700}
.nav-link.active::after{width:20px}
.site-header.is-stuck .nav-link{color:var(--muted)}
.site-header.is-stuck .nav-link:hover,
.site-header.is-stuck .nav-link.active{color:var(--ink)}

.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:14px;border:1px solid rgba(255,255,255,.36);
  background:rgba(255,255,255,.14);cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;margin:0 auto;background:#fff;border-radius:2px;transition:background .25s ease}
.site-header.is-stuck .burger{border-color:var(--line);background:#fff}
.site-header.is-stuck .burger span{background:var(--ink)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 26px -14px rgba(255,106,26,.9)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:var(--shadow-m)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-2px)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-2px);box-shadow:var(--shadow-s)}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.btn-block{width:100%}

/* ---------- hero banner ---------- */
.cat-hero{
  position:relative;display:flex;align-items:flex-end;overflow:hidden;
  min-height:340px;padding:158px 0 46px;
  background:var(--ink-2) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(108deg,rgba(10,30,33,.94) 0%,rgba(16,43,46,.84) 46%,rgba(226,82,10,.42) 100%);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;opacity:.3;
  background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);
  background-size:22px 22px;
}
.cat-hero .shell{position:relative;z-index:2;width:100%}
.hero-label{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  color:#fff;font-size:13px;letter-spacing:.02em;
}
.hero-label i{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
.cat-hero h1{
  color:#fff;font-size:clamp(30px,5vw,56px);font-weight:800;line-height:1.15;
  letter-spacing:-.01em;margin:20px 0 14px;
}
.hero-desc{color:rgba(247,251,249,.82);font-size:17px;max-width:660px}
.hero-foot{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-end;margin-top:32px}
.hero-stats{display:flex;flex-wrap:wrap;gap:30px}
.hero-stat b{display:block;color:#fff;font-size:23px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.3}
.hero-stat span{color:rgba(247,251,249,.66);font-size:13px}
.breadcrumb{list-style:none;display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(247,251,249,.7)}
.breadcrumb li{display:flex;gap:8px;align-items:center}
.breadcrumb li+li::before{content:"/";color:rgba(247,251,249,.42)}
.breadcrumb a{color:rgba(247,251,249,.86)}
.breadcrumb a:hover{color:#fff}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:740px;margin-bottom:44px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--accent);background:var(--accent-soft);padding:5px 13px;border-radius:999px;
}
.section-head h2{font-size:clamp(24px,3.4vw,38px);font-weight:700;line-height:1.25;color:var(--ink);margin:16px 0 12px}
.section-sub{color:var(--muted)}

/* ---------- chips ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.chip{
  height:42px;padding:0 20px;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--muted);font-size:14px;font-weight:500;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease;
}
.chip:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-1px)}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:600}
.chip:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* ---------- package grid ---------- */
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:24px}
.pkg-card{
  display:flex;flex-direction:column;gap:14px;padding:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-s);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.pkg-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:#f0dccb}
.pkg-media{position:relative;aspect-ratio:16/9;border-radius:16px;overflow:hidden;background:var(--ink)}
.pkg-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.pkg-card:hover .pkg-media img{transform:scale(1.04)}
.badge{
  position:absolute;top:12px;left:12px;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.pkg-title{font-size:20px;font-weight:600;color:var(--ink)}
.pkg-desc{font-size:14px;color:var(--muted);line-height:1.85}
.spec-list{display:flex;flex-direction:column;margin:2px 0 6px}
.spec-list>div{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-top:1px dashed var(--line);font-size:14px}
.spec-list dt{color:var(--muted)}
.spec-list dd{margin:0;color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.pkg-card .btn{margin-top:auto}

/* ---------- check row ---------- */
.check-row{display:flex;flex-wrap:wrap;gap:24px;align-items:stretch}
.check-item{
  flex:1 1 260px;padding:30px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-s);
  transition:transform .22s ease,box-shadow .22s ease;
}
.check-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-m)}
.check-item.is-feature{flex:1.4 1 320px;background:var(--ink);border-color:var(--ink);box-shadow:none}
.check-ico{
  width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--accent-soft);color:var(--accent);margin-bottom:18px;
}
.check-item.is-feature .check-ico{background:rgba(255,255,255,.12);color:var(--lime)}
.check-ico svg{width:22px;height:22px}
.check-item h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:10px}
.check-item p{font-size:15px;color:var(--muted)}
.check-item.is-feature h3{color:#fff}
.check-item.is-feature p{color:rgba(247,251,249,.78)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(228px,1fr));gap:24px}
.step{
  position:relative;padding:28px 24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-s);
  transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-m)}
.step-num{
  display:flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:13px;background:var(--primary-soft);color:var(--primary-deep);
  font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
}
.step h3{font-size:20px;font-weight:600;color:var(--ink);margin:18px 0 8px}
.step p{font-size:15px;color:var(--muted)}

/* ---------- version band ---------- */
.stat-band{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;margin-bottom:34px}
.stat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-s)}
.stat b{display:block;font-size:30px;font-weight:800;color:var(--ink);line-height:1.2;font-variant-numeric:tabular-nums}
.stat span{font-size:13px;color:var(--muted)}
.note-list{display:grid;gap:14px;max-width:860px}
.note-list li{
  list-style:none;display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:var(--muted);background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:16px 20px;
}
.note-list li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:11px;flex:0 0 auto}
.note-list strong{color:var(--ink);font-weight:600}

/* ---------- scene grid ---------- */
.scene-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:24px;align-items:start}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-s);
  transition:transform .22s ease,box-shadow .22s ease;
}
.scene-card:nth-child(2){margin-top:26px}
.scene-card:nth-child(3){margin-top:12px}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m)}
.scene-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene-body{padding:22px 22px 26px}
.scene-body h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:8px}
.scene-body p{font-size:15px;color:var(--muted)}
.scene-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:3px 10px;margin-bottom:12px}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 22px;transition:box-shadow .2s ease,border-color .2s ease}
.faq[open]{box-shadow:var(--shadow-s);border-color:#f0dccb}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 0;font-size:17px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--primary);font-size:23px;font-weight:400;line-height:1;transition:transform .25s ease}
.faq[open] summary::after{transform:rotate(45deg)}
.faq summary:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:10px}
.faq p{font-size:15px;color:var(--muted);padding-bottom:20px}

/* ---------- related links ---------- */
.link-list{display:grid;gap:14px;margin-bottom:38px}
.link-item{
  display:flex;gap:18px;align-items:center;padding:14px;background:#fff;
  border:1px solid var(--line);border-radius:18px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.link-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-s);border-color:#f0dccb}
.link-item img{width:132px;height:82px;border-radius:12px;object-fit:cover;flex:0 0 auto;transition:transform .3s ease}
.link-item:hover img{transform:scale(1.03)}
.link-item h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:4px}
.link-item p{font-size:14px;color:var(--muted)}
.link-item time{font-size:13px;color:#93a3a3;font-variant-numeric:tabular-nums}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;padding:90px 0;text-align:center;
  background:var(--ink-2) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,30,33,.92) 0%,rgba(16,43,46,.86) 100%);
}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.cta-inner h2{color:#fff;font-size:clamp(24px,3.4vw,38px);font-weight:700;line-height:1.25;margin-bottom:14px}
.cta-inner p{color:rgba(247,251,249,.78);margin-bottom:30px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--invert);padding-top:72px}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px}
.footer-desc{font-size:14px;color:rgba(247,251,249,.68);max-width:360px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(247,251,249,.72)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:20px 0;font-size:13px;color:rgba(247,251,249,.55);
  font-variant-numeric:tabular-nums;
}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:70;background:rgba(10,30,33,.55);
  opacity:0;pointer-events:none;transition:opacity .25s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;z-index:80;height:100%;width:min(320px,86vw);
  display:flex;flex-direction:column;gap:20px;padding:22px;background:#fff;
  box-shadow:var(--shadow-l);transform:translateX(102%);transition:transform .3s ease;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-head .brand-text{color:var(--ink);font-size:18px;font-weight:800}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;
  color:var(--ink);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-nav{display:grid;gap:6px}
.drawer-link{padding:14px 16px;border-radius:14px;font-size:16px;color:var(--text);background:var(--bg-alt)}
.drawer-link.active{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.drawer-cta{margin-top:auto}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .burger{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .scene-grid{grid-template-columns:1fr 1fr}
  .scene-card:nth-child(2),
  .scene-card:nth-child(3){margin-top:0}
}
@media (max-width:767px){
  .shell{padding:0 20px}
  .section{padding:60px 0}
  .cat-hero{padding:136px 0 38px;min-height:300px}
  .hero-foot{flex-direction:column;align-items:flex-start}
  .hero-stat b{font-size:20px}
  .scene-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .check-item{padding:24px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .link-item{flex-direction:column;align-items:flex-start}
  .link-item img{width:100%;height:158px}
  .btn{width:100%}
  .chip{width:100%;justify-content:center;display:inline-flex;align-items:center}
  .header-actions .btn{width:auto}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --primary:#FF6A1A;
  --primary-deep:#E2520A;
  --primary-soft:#FFF0E4;
  --accent:#0EA5A0;
  --accent-soft:#E4F5F3;
  --ink:#102B2E;
  --ink-deep:#0A1E21;
  --bg:#FFFAF5;
  --bg-alt:#F6F3EE;
  --surface:#FFFFFF;
  --line:#E9E1D8;
  --text:#2C3839;
  --muted:#6B7F80;
  --inverse:#F7FBF9;
  --lime:#B8E63C;
  --r-card:22px;
  --r-field:14px;
  --r-img:16px;
  --r-pill:999px;
  --sh-s:0 2px 8px rgba(16,43,46,.06);
  --sh-m:0 10px 30px -12px rgba(16,43,46,.18);
  --sh-l:0 24px 60px -24px rgba(16,43,46,.28);
  --shell:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.num{font-variant-numeric:tabular-nums;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 32px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  padding:14px 0;
  transition:padding .28s ease,background .28s ease,box-shadow .28s ease;
}
.site-header .shell{transition:max-width .28s ease;}
.nav-shell{
  display:flex;align-items:center;gap:18px;
  height:60px;padding:0 12px 0 16px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.62);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:0 12px 34px -22px rgba(16,43,46,.45);
  transition:background .28s ease,border-color .28s ease,box-shadow .28s ease,height .28s ease,border-radius .28s ease;
}
.site-header.is-stuck{padding:0;background:rgba(255,250,245,.96);border-bottom:1px solid var(--line);box-shadow:var(--sh-s);}
.site-header.is-stuck .nav-shell{background:transparent;border-color:transparent;box-shadow:none;border-radius:0;height:66px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),#FF9547);
  box-shadow:0 10px 20px -12px rgba(255,106,26,.95);
}
.brand-mark svg{width:19px;height:19px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{position:relative;padding:9px 14px;font-size:15px;color:var(--muted);border-radius:var(--r-pill);transition:color .2s,background .2s;}
.nav-link:hover{color:var(--ink);background:rgba(16,43,46,.05);}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:2px;background:var(--primary);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;width:42px;height:42px;border:0;border-radius:12px;
  background:rgba(16,43,46,.06);align-items:center;justify-content:center;color:var(--ink);
  transition:background .2s;
}
.nav-toggle:hover{background:rgba(16,43,46,.11);}
.nav-toggle svg{width:20px;height:20px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:var(--r-pill);font-size:15px;font-weight:600;letter-spacing:.01em;
  padding:13px 24px;cursor:pointer;
  transition:transform .2s ease,box-shadow .22s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 14px 26px -16px rgba(226,82,10,.95);}
.btn-primary:hover{background:#FF7B34;transform:translateY(-2px);box-shadow:var(--sh-m);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border:1px solid rgba(16,43,46,.18);color:var(--ink);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-2px);}
.btn-inverse{background:#fff;color:var(--ink);}
.btn-inverse:hover{transform:translateY(-2px);box-shadow:var(--sh-m);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

/* ---------- 文章头部 ---------- */
.article-head{
  position:relative;
  padding:112px 0 0;
  background:
    radial-gradient(680px 300px at 10% 0%,rgba(255,106,26,.12),transparent 70%),
    radial-gradient(560px 280px at 92% 16%,rgba(14,165,160,.12),transparent 72%),
    var(--bg);
  overflow:hidden;
}
.article-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(16,43,46,.10) 1px,transparent 1px);
  background-size:22px 22px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 78%);
}
.article-head .shell{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--muted);}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px;max-width:340px;}
.breadcrumb li+li::before{content:"/";color:#C9BFB4;}
.breadcrumb a{transition:color .2s;}
.breadcrumb a:hover{color:var(--primary-deep);}
.breadcrumb .current{color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.article-title-wrap{padding:34px 0 46px;max-width:880px;}
.cat-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);
}
.article-title{
  font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.28;
  letter-spacing:-.01em;color:var(--ink);margin-top:16px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:20px;font-size:14px;color:var(--muted);}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta svg{width:16px;height:16px;color:var(--accent);}

/* ---------- 正文布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:56px;align-items:start;
  padding:12px 0 96px;
}
.article-main{max-width:760px;min-width:0;}
.article-cover{
  border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-m);
  margin-bottom:38px;aspect-ratio:16/9;background:var(--ink);
}
.article-cover img{width:100%;height:100%;object-fit:cover;}
.article-body{font-size:17px;line-height:1.95;color:var(--text);}
.article-body > * + *{margin-top:22px;}
.article-body p{margin:0;}
.article-body h2{
  font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.45;color:var(--ink);
  margin-top:52px;padding-left:16px;border-left:5px solid var(--primary);
}
.article-body h3{font-size:20px;font-weight:600;line-height:1.5;color:var(--ink);margin-top:36px;}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin-top:28px;}
.article-body ul,.article-body ol{padding-left:26px;}
.article-body ul li{list-style:disc;margin-top:9px;}
.article-body ol li{list-style:decimal;margin-top:9px;}
.article-body li::marker{color:var(--primary);}
.article-body blockquote{
  border-left:4px solid var(--primary);background:var(--primary-soft);
  border-radius:0 var(--r-field) var(--r-field) 0;padding:16px 22px;color:#7B4620;
}
.article-body blockquote p{font-size:16px;line-height:1.9;}
.article-body img{border-radius:var(--r-img);margin:30px auto;box-shadow:var(--sh-s);height:auto;}
.article-body a{color:var(--primary-deep);text-decoration:underline;text-underline-offset:3px;transition:color .2s;}
.article-body a:hover{color:var(--primary);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body code{
  background:var(--bg-alt);border:1px solid var(--line);border-radius:6px;
  padding:2px 7px;font-size:.92em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.article-body pre{
  background:var(--ink);color:#E8F2F0;border-radius:var(--r-field);
  padding:18px 20px;overflow-x:auto;font-size:14px;line-height:1.8;
}
.article-body pre code{background:transparent;border:0;color:inherit;padding:0;}
.article-body table{width:100%;border-collapse:collapse;display:block;overflow-x:auto;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:var(--bg-alt);color:var(--ink);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:38px 0;}

.empty-state{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:56px 32px;text-align:center;box-shadow:var(--sh-s);
}
.empty-state h2{font-size:24px;font-weight:700;color:var(--ink);margin:18px 0 10px;}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:24px;}
.empty-icon{width:64px;height:64px;margin:0 auto;border-radius:20px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);}
.empty-icon svg{width:30px;height:30px;}

/* ---------- 侧栏 ---------- */
.side{position:sticky;top:104px;display:grid;gap:20px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-s);
}
.side-card h3{
  display:flex;align-items:center;gap:9px;
  font-size:16px;font-weight:700;color:var(--ink);margin-bottom:12px;
}
.side-card h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--primary);}
.side-list li+li{border-top:1px dashed var(--line);}
.side-list a{display:block;padding:13px 0;font-size:14.5px;line-height:1.65;color:var(--text);transition:color .2s,transform .2s;}
.side-list a:hover{color:var(--primary-deep);transform:translateX(4px);}
.side-list .side-tag{display:block;font-size:12px;color:var(--muted);margin-top:5px;}
.side-download{
  background:linear-gradient(155deg,#12403F 0%,var(--ink) 55%,var(--ink-deep) 100%);
  border-color:transparent;color:var(--inverse);
}
.side-download h3{color:#fff;}
.side-download h3::before{background:var(--lime);}
.side-download p{font-size:13.5px;line-height:1.85;color:rgba(247,251,249,.75);margin-bottom:18px;}
.side-facts{display:grid;gap:10px;font-size:13.5px;color:var(--muted);}
.side-facts div{display:flex;justify-content:space-between;gap:12px;padding-bottom:8px;border-bottom:1px dashed var(--line);}
.side-facts div:last-child{border-bottom:0;padding-bottom:0;}
.side-facts b{color:var(--ink);font-weight:600;}

/* ---------- 板块通用 ---------- */
.section{padding:0 0 96px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;}
.sec-title{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;color:var(--ink);}
.sec-sub{font-size:14px;color:var(--muted);margin-top:8px;}
.sec-link{font-size:14px;font-weight:600;color:var(--primary-deep);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.sec-link:hover{color:var(--primary);}

/* ---------- 快捷入口卡片 ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-s);
  transition:transform .22s ease-out,box-shadow .22s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);}
.card-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.card:hover .card-thumb img{transform:scale(1.04);}
.card-body{padding:20px 22px 24px;}
.card-body h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.55;}
.card-body p{font-size:14px;color:var(--muted);line-height:1.85;margin-top:9px;}
.card-body .card-go{margin-top:14px;font-size:13.5px;font-weight:600;color:var(--primary-deep);}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  padding:0 22px;margin-bottom:12px;transition:box-shadow .22s,border-color .22s;
}
.faq details:hover{border-color:#DCD2C6;}
.faq details[open]{box-shadow:var(--sh-s);}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";font-size:24px;line-height:1;color:var(--primary);font-weight:400;
  transition:transform .25s ease;
}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq p{font-size:14.5px;line-height:1.9;color:var(--muted);padding-bottom:18px;}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:28px;
  padding:66px 40px;text-align:center;color:var(--inverse);
  background:var(--ink-deep) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(125deg,rgba(10,30,33,.94),rgba(16,43,46,.78));
}
.cta-inner{position:relative;z-index:2;}
.cta-inner h2{font-size:clamp(23px,3vw,34px);font-weight:800;line-height:1.35;color:#fff;}
.cta-inner p{font-size:15px;color:rgba(247,251,249,.78);margin:14px auto 28px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.cta-note{margin-top:20px;font-size:13px;color:rgba(247,251,249,.6);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-deep);color:var(--inverse);padding:64px 0 0;margin-top:8px;}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:#fff;letter-spacing:-.01em;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(247,251,249,.68);margin-top:16px;max-width:360px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul li+li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(247,251,249,.72);transition:color .2s;}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding:20px 0;font-size:13px;color:rgba(247,251,249,.55);
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:90;
  width:56px;height:56px;border:0;border-radius:50%;cursor:pointer;
  background:var(--primary);color:#fff;display:grid;place-items:center;
  box-shadow:var(--sh-l);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s,background .2s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:#FF7B34;}
.to-top svg{width:22px;height:22px;}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:120;pointer-events:none;}
.drawer-mask{position:absolute;inset:0;background:rgba(10,30,33,.55);opacity:0;transition:opacity .3s ease;}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(84vw,340px);
  background:var(--surface);display:flex;flex-direction:column;
  padding:22px 20px 24px;transform:translateX(102%);
  transition:transform .34s cubic-bezier(.22,.61,.36,1);
  box-shadow:-20px 0 60px -30px rgba(16,43,46,.5);
}
.drawer.open{pointer-events:auto;}
.drawer.open .drawer-mask{opacity:1;}
.drawer.open .drawer-panel{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{width:40px;height:40px;border:0;border-radius:12px;background:var(--bg-alt);color:var(--ink);display:grid;place-items:center;}
.drawer-nav{display:grid;gap:4px;}
.drawer-nav .nav-link{display:block;padding:14px 12px;font-size:16px;border-radius:14px;}
.drawer-cta{margin-top:auto;padding-top:20px;}

@media (max-width:1280px){
  .shell{padding:0 28px;}
}
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:44px;padding-bottom:80px;}
  .article-main{max-width:none;}
  .side{position:static;}
  .quick-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn{display:none;}
  .section{padding-bottom:72px;}
  .cta-band{padding:52px 24px;border-radius:24px;}
}
@media (max-width:640px){
  .shell{padding:0 20px;}
  .article-head{padding-top:96px;}
  .article-title-wrap{padding:26px 0 34px;}
  .article-body{font-size:16.5px;}
  .quick-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .article-meta{gap:14px;}
  .to-top{right:16px;bottom:18px;width:50px;height:50px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
    --primary:#FF6A1A;
    --primary-deep:#E2520A;
    --primary-soft:#FFF0E4;
    --accent:#0EA5A0;
    --accent-soft:#E4F5F3;
    --ink:#102B2E;
    --ink-deep:#0A1E21;
    --bg:#FFFAF5;
    --bg-alt:#F6F3EE;
    --surface:#FFFFFF;
    --line:#E9E1D8;
    --text:#2C3839;
    --muted:#6B7F80;
    --lime:#B8E63C;
    --white:#F7FBF9;
    --r-card:22px;
    --r-sm:14px;
    --r-img:16px;
    --sh-s:0 2px 8px rgba(16,43,46,.06);
    --sh-m:0 10px 30px -12px rgba(16,43,46,.18);
    --sh-l:0 24px 60px -24px rgba(16,43,46,.28);
    --gap-1:8px;
    --gap-2:16px;
    --gap-3:24px;
    --gap-4:32px;
    --sec-desktop:96px;
    --sec-mobile:52px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  b,strong{font-weight:700;}
  .num{font-variant-numeric:tabular-nums;}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

  /* ---------- 导航 ---------- */
  .site-header{position:fixed;top:0;left:0;right:0;z-index:90;}
  .header-inner{
    max-width:1200px;
    margin:14px auto;
    display:flex;
    align-items:center;
    gap:20px;
    padding:10px 12px 10px 20px;
    border-radius:999px;
    background:rgba(255,255,255,.55);
    border:1px solid rgba(16,43,46,.08);
    backdrop-filter:blur(14px) saturate(150%);
    -webkit-backdrop-filter:blur(14px) saturate(150%);
    box-shadow:var(--sh-s);
    transition:background .28s ease,box-shadow .28s ease,padding .28s ease,border-radius .28s ease;
  }
  .site-header.is-scrolled .header-inner{
    max-width:100%;
    margin:0;
    border-radius:0;
    border-left:0;
    border-right:0;
    border-top:0;
    border-bottom:1px solid var(--line);
    background:rgba(255,250,245,.95);
    box-shadow:none;
    padding:8px 32px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;
    background:linear-gradient(140deg,var(--primary),var(--primary-deep));
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px -8px rgba(226,82,10,.8);
  }
  .brand-mark svg{width:19px;height:19px;}
  .brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
  .nav-links{display:flex;align-items:center;gap:6px;margin-left:12px;}
  .nav-link{
    position:relative;
    padding:9px 14px;
    border-radius:999px;
    font-size:15px;
    font-weight:500;
    color:var(--ink);
    transition:color .2s ease,background .2s ease;
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--primary-deep);background:rgba(255,106,26,.08);}
  .nav-link.active{font-weight:700;color:var(--ink);}
  .nav-link.active::after{
    content:"";
    position:absolute;left:14px;right:14px;bottom:2px;height:3px;
    border-radius:3px;background:var(--primary);
  }
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;letter-spacing:.01em;
    border-radius:999px;
    padding:13px 26px;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  }
  .btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px -12px rgba(226,82,10,.9);}
  .btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:var(--sh-m);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{background:transparent;color:var(--ink);border:1px solid rgba(16,43,46,.22);}
  .btn-ghost:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-2px);}
  .btn-light{background:#fff;color:var(--ink);}
  .btn-light:hover{transform:translateY(-2px);box-shadow:var(--sh-m);}
  .btn-sm{padding:10px 20px;font-size:14px;}

  .menu-toggle{
    display:none;width:44px;height:44px;border-radius:13px;
    border:1px solid var(--line);background:#fff;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
  }
  .menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
  body.drawer-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  body.drawer-open .menu-toggle span:nth-child(2){opacity:0;}
  body.drawer-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .drawer-mask{position:fixed;inset:0;background:rgba(10,30,33,.5);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:95;}
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:min(330px,86vw);
    background:var(--ink);color:var(--white);z-index:96;
    transform:translateX(102%);transition:transform .3s ease;
    display:flex;flex-direction:column;padding:26px 22px;
  }
  body.drawer-open .drawer{transform:translateX(0);}
  body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
  .drawer-brand{display:flex;align-items:center;gap:10px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.08);}
  .drawer-brand .brand-text{color:var(--white);}
  .drawer-nav{display:flex;flex-direction:column;gap:6px;margin-top:22px;}
  .drawer-nav a{padding:14px 12px;border-radius:var(--r-sm);font-size:16px;color:rgba(247,251,249,.86);transition:background .2s ease,color .2s ease;}
  .drawer-nav a:hover,.drawer-nav a.active{background:rgba(255,106,26,.16);color:#fff;}
  .drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);}

  /* ---------- 极简头部 ---------- */
  .help-head{padding:158px 0 0;background:var(--bg);}
  .deco-squares{display:flex;gap:7px;margin-bottom:20px;}
  .deco-squares i{display:block;width:12px;height:12px;border-radius:3px;background:var(--primary-soft);}
  .deco-squares i:nth-child(2){background:var(--accent-soft);}
  .deco-squares i:nth-child(3){background:var(--lime);opacity:.85;}
  .help-title{font-size:clamp(34px,5vw,58px);font-weight:800;line-height:1.12;letter-spacing:-.01em;color:var(--ink);}
  .help-sub{max-width:680px;margin-top:20px;font-size:17px;color:var(--muted);}
  .head-rule{height:1px;background:var(--line);margin:34px 0 24px;}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
  .crumbs li{display:flex;align-items:center;gap:10px;}
  .crumbs li+li::before{content:"/";color:#c8bfb4;}
  .crumbs a:hover{color:var(--primary-deep);text-decoration:underline;}
  .head-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:32px 0 56px;}
  .stat-pill{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 20px;box-shadow:var(--sh-s);transition:transform .2s ease,box-shadow .2s ease;}
  .stat-pill:hover{transform:translateY(-3px);box-shadow:var(--sh-m);}
  .stat-pill b{display:block;font-size:24px;font-weight:800;color:var(--ink);line-height:1.3;}
  .stat-pill span{font-size:13px;color:var(--muted);}

  /* ---------- 通用板块 ---------- */
  .section{padding:var(--sec-desktop) 0;}
  .section-alt{background:var(--bg-alt);}
  .sec-head{max-width:720px;margin-bottom:44px;}
  .sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--primary-deep);text-transform:uppercase;}
  .sec-kicker::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--primary);}
  .sec-title{font-size:clamp(24px,3.4vw,38px);font-weight:700;line-height:1.25;color:var(--ink);margin-top:14px;letter-spacing:-.01em;}
  .sec-desc{margin-top:14px;color:var(--muted);font-size:16px;}

  /* ---------- 场景定位 ---------- */
  .scene-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
  .chip{
    padding:9px 17px;border-radius:999px;border:1px solid var(--line);background:var(--surface);
    font-size:14px;color:var(--muted);transition:transform .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .chip:hover{color:var(--primary-deep);border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh-s);}
  .chip-lead{background:var(--ink);color:var(--white);border-color:var(--ink);font-weight:600;}
  .chip-lead:hover{color:#fff;background:var(--ink-deep);border-color:var(--ink-deep);}

  .quick-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr;gap:20px;}
  .quick-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px;box-shadow:var(--sh-s);
    display:flex;flex-direction:column;gap:12px;
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .quick-card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);border-color:#e0d5c8;}
  .quick-card.feature{background:linear-gradient(155deg,#fff 0%,var(--primary-soft) 100%);border-color:#f6dcc5;}
  .quick-card h3{font-size:20px;font-weight:700;color:var(--ink);line-height:1.4;}
  .quick-card p{font-size:15px;color:var(--muted);}
  .quick-tag{align-self:flex-start;font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;background:var(--accent-soft);color:#0a7d79;}
  .quick-card.feature .quick-tag{background:var(--primary-soft);color:var(--primary-deep);}
  .quick-link{font-size:14px;font-weight:600;color:var(--primary-deep);margin-top:auto;}
  .quick-link:hover{text-decoration:underline;}

  /* ---------- 帮助条目列表（左图右文） ---------- */
  .help-list{border-top:1px solid var(--line);}
  .help-row{
    display:grid;grid-template-columns:240px 1fr;gap:28px;
    padding:28px 18px;border-bottom:1px solid var(--line);
    transition:background .22s ease;
  }
  .help-row:hover{background:var(--surface);}
  .help-thumb{border-radius:var(--r-img);overflow:hidden;background:var(--ink);aspect-ratio:16/11;}
  .help-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease;}
  .help-row:hover .help-thumb img{transform:scale(1.04);}
  .help-body{display:flex;flex-direction:column;gap:10px;}
  .badge{display:inline-flex;align-self:flex-start;font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;}
  .badge-orange{background:var(--primary-soft);color:var(--primary-deep);}
  .badge-teal{background:var(--accent-soft);color:#0a7d79;}
  .badge-lime{background:#f2fad5;color:#5c7a06;}
  .help-body h3{font-size:20px;font-weight:700;line-height:1.45;color:var(--ink);}
  .help-body h3 a:hover{color:var(--primary-deep);text-decoration:underline;}
  .help-body p{font-size:15px;color:var(--muted);max-width:760px;}
  .meta{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--muted);margin-top:2px;}
  .meta span{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums;}
  .meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);}

  /* ---------- 排查顺序 ---------- */
  .step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .step-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:28px;box-shadow:var(--sh-s);position:relative;overflow:hidden;
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);}
  .step-num{font-size:40px;font-weight:800;color:var(--primary-soft);line-height:1;font-variant-numeric:tabular-nums;}
  .step-card h3{font-size:19px;font-weight:700;color:var(--ink);margin-top:12px;}
  .step-card p{font-size:15px;color:var(--muted);margin-top:10px;}
  .step-card::after{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:linear-gradient(90deg,var(--primary),var(--lime));opacity:0;transition:opacity .22s ease;}
  .step-card:hover::after{opacity:1;}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:820px;margin:0 auto;}
  .faq-item{background:var(--surface);border:1px solid var(--line);border-radius:18px;margin-bottom:12px;overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;}
  .faq-item[open]{box-shadow:var(--sh-m);border-color:#e3d8ca;}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";font-size:22px;font-weight:600;color:var(--primary);
    transition:transform .25s ease;line-height:1;
  }
  .faq-item[open] summary::after{transform:rotate(45deg);}
  .faq-item p{padding:0 24px 20px;color:var(--muted);font-size:15px;}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;padding:96px 0;color:var(--white);overflow:hidden;
    background-image:
      linear-gradient(115deg,rgba(10,30,33,.94) 0%,rgba(10,30,33,.78) 55%,rgba(16,43,46,.68) 100%),
      url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
  }
  .cta-inner{max-width:760px;text-align:center;margin:0 auto;position:relative;z-index:2;}
  .cta-inner h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;line-height:1.25;letter-spacing:-.01em;}
  .cta-inner p{margin-top:16px;color:rgba(247,251,249,.8);font-size:16px;}
  .cta-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:32px;}
  .cta-note{margin-top:20px;font-size:13px;color:rgba(247,251,249,.62);font-variant-numeric:tabular-nums;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:var(--white);border-top:1px solid rgba(255,255,255,.08);}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:72px 0 52px;}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
  .footer-brand .brand-text{color:var(--white);}
  .footer-desc{font-size:14px;color:rgba(247,251,249,.66);max-width:340px;}
  .footer-col h4{font-size:14px;font-weight:600;color:var(--white);margin-bottom:16px;}
  .footer-col li{margin-bottom:10px;}
  .footer-col a{font-size:14px;color:rgba(247,251,249,.68);transition:color .2s ease;}
  .footer-col a:hover{color:var(--primary);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
    padding:20px 0;border-top:1px solid rgba(255,255,255,.08);
    font-size:13px;color:rgba(247,251,249,.56);font-variant-numeric:tabular-nums;
  }

  /* ---------- 回顶 ---------- */
  .to-top{
    position:fixed;right:26px;bottom:26px;width:56px;height:56px;border-radius:50%;
    background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;
    box-shadow:var(--sh-l);opacity:0;visibility:hidden;transform:translateY(12px);
    transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;z-index:80;
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{background:var(--primary-deep);}

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    .shell{padding:0 24px;}
    .site-header.is-scrolled .header-inner{padding:8px 24px;}
    .head-stats{grid-template-columns:repeat(2,1fr);}
    .quick-grid{grid-template-columns:1fr 1fr;}
    .quick-card.feature{grid-column:1 / -1;}
    .step-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px;}
  }
  @media (max-width:900px){
    .nav-links{display:none;}
    .header-actions .btn{display:none;}
    .menu-toggle{display:flex;}
  }
  @media (max-width:768px){
    .section{padding:var(--sec-mobile) 0;}
    .help-head{padding-top:126px;}
    .help-row{grid-template-columns:1fr;gap:16px;padding:24px 12px;}
    .help-thumb{aspect-ratio:16/9;}
    .cta-band{padding:64px 0;}
    .footer-grid{grid-template-columns:1fr 1fr;padding:52px 0 36px;}
    .footer-desc{max-width:none;}
  }
  @media (max-width:640px){
    .shell{padding:0 20px;}
    .header-inner{margin:10px 12px;padding:8px 10px 8px 14px;}
    .site-header.is-scrolled .header-inner{padding:8px 16px;}
    .head-stats{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:40px;}
    .quick-grid{grid-template-columns:1fr;}
    .cta-btns .btn{width:100%;}
    .to-top{right:16px;bottom:16px;width:50px;height:50px;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;gap:6px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  }