/* roulang page: index */
:root{
  --brand:#0E4F45;--brand-600:#0A3A32;--brand-050:#E9F2EF;
  --accent:#FF9F1C;--accent-050:#FFF4E3;--urgent:#E4572E;
  --bg:#F6F5F1;--surface:#FFFFFF;--surface-2:#F0F4F1;
  --ink:#14201D;--muted:#5B6B66;--line:#DCE5E1;
  --ok:#1F9D6B;--info:#2C7BE5;
  --r-btn:12px;--r-card:18px;--r-input:10px;--r-badge:8px;--r-img:16px;--r-num:14px;
  --s1:0 1px 2px rgba(20,32,29,.05);
  --s2:0 8px 24px -12px rgba(20,32,29,.16);
  --s3:0 20px 48px -20px rgba(20,32,29,.24);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);color:var(--ink);font-size:16px;line-height:1.9;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t)}
a:hover{color:var(--brand-600)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4,p,ul,ol{word-wrap:break-word}
.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:1024px){.container{padding:0 32px}}
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:104px 0}}
.section-tight{padding:48px 0}
@media (min-width:1024px){.section-tight{padding:72px 0}}

/* ---------- 排版 ---------- */
.h1{font-size:clamp(28px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:-.02em;margin:0 0 18px}
.h2{font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.3;margin:0 0 12px;letter-spacing:-.01em}
.h2.line-left{padding-left:16px;position:relative}
.h2.line-left::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand)}
.h2.line-top{padding-top:20px;position:relative}
.h2.line-top::before{content:"";position:absolute;left:0;top:0;width:32px;height:4px;border-radius:2px;background:var(--brand)}
.h3{font-size:20px;font-weight:600;line-height:1.5;margin:0 0 8px}
.section-sub{color:var(--muted);font-size:15px;line-height:1.8;margin:0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.lead{font-size:16px;line-height:1.9;color:var(--ink);margin:0 0 18px}
.muted{color:var(--muted)}
.small{font-size:13px;line-height:1.7;color:var(--muted)}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
}
.btn-lg{height:48px;padding:0 28px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:var(--s2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-600);transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#F08F0A;color:var(--ink);transform:translateY(-1px);box-shadow:var(--s2)}
.btn[disabled],.btn.disabled{opacity:.45;pointer-events:none}
.text-link{font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px dashed var(--brand);padding-bottom:1px}
.text-link:hover{color:var(--brand-600);border-bottom-color:var(--brand-600)}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--brand-050);color:var(--brand);font-size:12px;font-weight:600;padding:4px 10px;border-radius:var(--r-badge);line-height:1.6}
.badge-accent{background:var(--accent-050);color:#8A5300}
.badge-urgent{background:#FDEBE5;color:var(--urgent)}
.tag{display:inline-block;font-size:13px;color:var(--brand);background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-badge);padding:4px 12px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.scrolled{box-shadow:var(--s1)}
.nav-inner{display:flex;align-items:center;gap:16px;height:60px}
@media (min-width:1024px){.nav-inner{height:68px;gap:20px}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:32px;height:32px;flex:0 0 32px}
.brand-name{font-weight:800;font-size:18px;color:var(--brand);letter-spacing:-.01em;white-space:nowrap}
@media (min-width:1024px){.brand-name{font-size:19px}}
.main-nav{display:none}
@media (min-width:1024px){
  .main-nav{display:block;flex:1}
  .main-nav ul{display:flex;list-style:none;margin:0;padding:0;gap:2px;justify-content:center}
  .main-nav a{display:block;padding:8px 12px;font-size:15px;font-weight:500;color:var(--ink);border-bottom:2px solid transparent;border-radius:6px 6px 0 0}
  .main-nav a:hover{color:var(--brand);background:var(--brand-050)}
  .main-nav a.active{color:var(--brand);font-weight:700;border-bottom-color:var(--brand)}
}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.cmd-search{display:none}
@media (min-width:1024px){
  .cmd-search{display:block;position:relative;width:300px;flex-shrink:0}
}
.cmd-search input[type="search"]{
  width:100%;height:40px;border-radius:var(--r-input);border:1px solid transparent;
  background:var(--surface-2);padding:0 42px 0 38px;font-size:14px;outline:none;
  transition:border-color var(--t),background var(--t),box-shadow var(--t);
}
.cmd-search input[type="search"]::placeholder{color:var(--muted)}
.cmd-search input[type="search"]:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(14,79,69,.10)}
.cmd-search .s-icon{position:absolute;left:12px;top:20px;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.cmd-search .kbd{
  position:absolute;right:10px;top:20px;transform:translateY(-50%);
  font-size:11px;line-height:1;color:var(--muted);background:#fff;border:1px solid var(--line);
  border-radius:6px;padding:4px 6px;pointer-events:none;
}
.cmd-panel{
  position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--s2);padding:12px;
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.cmd-search:focus-within .cmd-panel{opacity:1;visibility:visible;transform:translateY(0)}
.cmd-panel .cp-title{font-size:12px;color:var(--muted);margin:0 0 8px}
.cmd-panel ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.cmd-panel li a{display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--ink)}
.cmd-panel li a:hover{background:var(--brand-050);color:var(--brand)}
.cmd-panel .cp-tip{margin:8px 0 0;padding-top:8px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.nav-quiet{display:none}
@media (min-width:1200px){.nav-quiet{display:inline-block;font-size:14px;font-weight:600;color:var(--ink);padding:8px 4px}}
.nav-quiet:hover{color:var(--brand)}
.nav-cta{display:none}
@media (min-width:1024px){.nav-cta{display:inline-flex}}
.hamburger{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;
}
.hamburger:hover{border-color:var(--brand);background:var(--brand-050)}
@media (min-width:1024px){.hamburger{display:none}}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,32,29,.45);z-index:70;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:80;
  transform:translateX(100%);transition:transform 280ms ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;box-shadow:var(--s3);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:18px;line-height:1}
.drawer-close:hover{background:var(--brand-050);border-color:var(--brand)}
.drawer-search{margin-bottom:16px}
.drawer-search input{
  width:100%;height:44px;border-radius:var(--r-input);border:1px solid var(--line);
  background:var(--surface-2);padding:0 14px;font-size:15px;outline:none;
}
.drawer-search input:focus{border-color:var(--brand);background:#fff}
.drawer nav ul{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.drawer nav a{display:block;padding:12px 12px;border-radius:10px;font-size:16px;color:var(--ink);font-weight:500}
.drawer nav a:hover,.drawer nav a.active{background:var(--brand-050);color:var(--brand);font-weight:700}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:44px 0 56px}
@media (min-width:1024px){.hero{padding:72px 0 88px}}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(var(--brand) 1px,transparent 1px),linear-gradient(90deg,var(--brand) 1px,transparent 1px);
  background-size:44px 44px;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:1fr 1fr;gap:56px}}
.hero-media{order:-1;position:relative}
@media (min-width:1024px){.hero-media{order:0}}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--s2);background:var(--surface-2)}
@media (min-width:768px){.hero-media img{aspect-ratio:16/10}}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-img);pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:36px 36px;opacity:.34;
}
.hero-badge{margin-bottom:18px}
.hero-sub{font-size:16px;line-height:1.9;color:var(--muted);margin:0 0 28px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.trust-row{
  display:grid;grid-template-columns:repeat(2,1fr);gap:18px;
  padding-top:24px;border-top:1px solid var(--line);
}
@media (min-width:768px){.trust-row{grid-template-columns:repeat(4,1fr);gap:0}}
.trust-item{position:relative;padding-right:8px}
@media (min-width:768px){
  .trust-item{padding:0 22px}
  .trust-item:first-child{padding-left:0}
  .trust-item+.trust-item{border-left:1px solid var(--line)}
}
.trust-num{display:block;font-size:24px;font-weight:700;line-height:1.3;color:var(--brand)}
.trust-label{display:block;font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- 信任条 ---------- */
.metric-strip{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);padding:24px}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (min-width:1024px){.metric-grid{grid-template-columns:repeat(4,1fr)}}
.metric{padding:4px 0}
@media (min-width:1024px){.metric+.metric{border-left:1px solid var(--line);padding-left:22px}}
.metric-num{font-size:26px;font-weight:700;color:var(--brand);line-height:1.3;display:block}
.metric-txt{font-size:13px;color:var(--muted);line-height:1.7;display:block;margin-top:2px}

/* ---------- 卡片通用 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--s1);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
@media (max-width:639px){.card{padding:20px}}
.card:hover{box-shadow:var(--s2);transform:translateY(-2px)}
.card-title{font-size:18px;font-weight:600;line-height:1.55;margin:0 0 8px}
.card-title a{color:var(--ink)}
.card-title a:hover{color:var(--brand)}
.card-desc{font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 14px}

/* ---------- 类目入口 ---------- */
.cat-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.cat-grid{grid-template-columns:repeat(4,1fr)}}
.cat-card{display:flex;flex-direction:column;padding:0;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);transition:box-shadow var(--t),transform var(--t)}
.cat-card:hover{box-shadow:var(--s2);transform:translateY(-2px)}
.cat-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--surface-2)}
.cat-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.cat-body h3{font-size:17px;font-weight:600;margin:0;color:var(--ink)}
.cat-body p{font-size:13.5px;line-height:1.75;color:var(--muted);margin:0}
.cat-body .cat-foot{margin-top:auto;padding-top:8px}

/* ---------- 权益阶梯 ---------- */
.tier-wrap{position:relative}
.tier-line{display:none}
@media (min-width:1024px){
  .tier-line{
    display:block;position:absolute;left:0;right:0;top:34px;border-top:2px dashed var(--line);z-index:0;
  }
}
.tier-grid{position:relative;display:grid;grid-template-columns:1fr;gap:26px;z-index:1}
@media (min-width:640px){.tier-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.tier-grid{grid-template-columns:repeat(4,1fr);gap:22px}}
.tier{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:44px 22px 22px;box-shadow:var(--s1);display:flex;flex-direction:column;
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.tier:hover{box-shadow:var(--s2);transform:translateY(-2px)}
@media (min-width:1024px){
  .tier:nth-child(2){margin-top:14px}
  .tier:nth-child(3){margin-top:28px}
  .tier:nth-child(4){margin-top:42px}
}
.tier-num{
  position:absolute;left:22px;top:-16px;width:42px;height:42px;border-radius:50%;
  background:var(--accent);color:#fff;font-weight:700;font-size:17px;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--s1);
}
.tier-name{font-size:18px;font-weight:700;margin:0 0 6px;color:var(--ink)}
.tier-gate{font-size:13px;color:var(--muted);line-height:1.75;margin:0 0 16px;padding-bottom:14px;border-bottom:1px dashed var(--line)}
.tier-list{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:9px}
.tier-list li{position:relative;padding-left:16px;font-size:14px;line-height:1.75;color:var(--ink)}
.tier-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:1px;background:var(--accent)}
.tier-foot{margin-top:auto}
.tier.featured{background:var(--brand-050);border-color:var(--brand);box-shadow:var(--s2)}
.tier-flag{
  position:absolute;top:14px;right:14px;background:var(--brand);color:#fff;font-size:11px;font-weight:600;
  padding:3px 9px;border-radius:var(--r-badge);letter-spacing:.02em;
}

/* ---------- 套餐对比 ---------- */
.plan-table-wrap{display:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);overflow:hidden}
@media (min-width:1024px){.plan-table-wrap{display:block}}
table.plan-table{width:100%;border-collapse:collapse;font-size:14px}
table.plan-table th,table.plan-table td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);vertical-align:middle}
table.plan-table thead th{background:var(--surface-2);font-size:15px;font-weight:700;color:var(--ink);text-align:center}
table.plan-table thead th:first-child{text-align:left;color:var(--muted);font-weight:600}
table.plan-table tbody tr:nth-child(odd) td{background:var(--surface-2)}
table.plan-table tbody tr:nth-child(even) td{background:#fff}
table.plan-table tbody td:first-child{text-align:left;font-weight:600;color:var(--ink);white-space:nowrap}
table.plan-table tbody tr:last-child th,table.plan-table tbody tr:last-child td{border-bottom:none}
.plan-col-rec{position:relative}
table.plan-table th.plan-col-rec,table.plan-table td.plan-col-rec{
  background:var(--brand-050) !important;border-left:1px solid var(--brand);border-right:1px solid var(--brand);
}
table.plan-table thead th.plan-col-rec{border-top:1px solid var(--brand)}
table.plan-table tbody tr:last-child td.plan-col-rec{border-bottom:1px solid var(--brand)}
.plan-flag{display:inline-block;background:var(--accent);color:#fff;font-size:11px;font-weight:600;padding:2px 8px;border-radius:var(--r-badge);margin-bottom:6px}
.plan-price{display:block;font-size:13px;color:var(--muted);font-weight:500;margin-top:4px}
.cell-strong{font-weight:700;color:var(--urgent)}

.plan-cards{display:grid;gap:20px}
@media (min-width:640px){.plan-cards{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.plan-cards{display:none}}
.plan-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--s1);transition:box-shadow var(--t),transform var(--t)}
.plan-card:hover{box-shadow:var(--s2);transform:translateY(-2px)}
.plan-card.rec{border-color:var(--brand);background:var(--brand-050);box-shadow:var(--s2)}
.plan-card h3{font-size:19px;font-weight:700;margin:6px 0 4px}
.plan-card .pc-price{font-size:13px;color:var(--muted);margin:0 0 16px}
.pc-row{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-top:1px dashed var(--line);font-size:13.5px}
.pc-row span:first-child{color:var(--muted);flex:0 0 42%}
.pc-row span:last-child{text-align:right;color:var(--ink)}
.plan-card .btn{margin-top:18px;width:100%}

/* ---------- 限时区块 ---------- */
.urgent-band{
  background:var(--brand);color:#fff;position:relative;overflow:hidden;
  padding:56px 0;
}
@media (min-width:1024px){.urgent-band{padding:72px 0}}
.urgent-band::before{
  content:"";position:absolute;inset:0;opacity:.08;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:52px 52px;
}
.urgent-grid{position:relative;display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media (min-width:1024px){.urgent-grid{grid-template-columns:1fr auto auto;gap:40px}}
.urgent-band h2{color:#fff;margin:0 0 10px}
.urgent-band p{color:rgba(255,255,255,.82);font-size:15px;line-height:1.85;margin:0}
.countdown{display:flex;gap:10px;flex-wrap:nowrap}
.cd-block{
  background:var(--surface);color:var(--ink);border-radius:var(--r-num);
  min-width:66px;padding:10px 6px;text-align:center;box-shadow:var(--s1);
}
.cd-num{display:block;font-size:26px;font-weight:700;line-height:1.25;font-variant-numeric:tabular-nums}
.cd-label{display:block;font-size:12px;color:var(--muted);line-height:1.6}

/* ---------- 资讯列表 ---------- */
.post-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr)}}
.post-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.post-card .post-cover{display:block;overflow:hidden}
.post-card .post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px 12px 0 0;background:var(--surface-2);transition:transform 320ms ease-out}
.post-card:hover .post-cover img{transform:scale(1.03)}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body .card-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.post-body .card-desc{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);padding:48px 24px;text-align:center;
  background:var(--surface);display:flex;flex-direction:column;align-items:center;gap:16px;
}
.empty-state p{margin:0;color:var(--muted);font-size:15px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);overflow:hidden;transition:border-color var(--t),background var(--t)
}
.faq-item[open]{background:var(--brand-050);border-color:var(--brand)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 54px 20px 24px;position:relative;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:translateY(-70%) rotate(45deg);transition:transform var(--t);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--ink)}
.faq-body p{margin:0}

/* ---------- 表单 ---------- */
.consult-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.consult-grid{grid-template-columns:5fr 7fr;gap:48px}}
.consult-list{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:14px}
.consult-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.8;color:var(--ink)}
.consult-list li::before{content:"";flex:0 0 8px;width:8px;height:8px;margin-top:10px;border-radius:2px;background:var(--accent)}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--s2)}
@media (max-width:639px){.form-card{padding:20px}}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px;color:var(--ink)}
.field .req{color:var(--urgent)}
.field input[type="text"],.field input[type="tel"],.field input[type="email"],.field select,.field textarea{
  width:100%;height:48px;border-radius:var(--r-input);border:1px solid var(--line);
  background:#fff;padding:0 14px;font-size:15px;outline:none;
  transition:border-color var(--t),background var(--t),box-shadow var(--t);
}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.8;resize:vertical}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235B6B66' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);background:var(--brand-050);box-shadow:0 0 0 3px rgba(14,79,69,.10)}
.field .hint{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.6}
.field.error input,.field.error select,.field.error textarea{border-color:var(--urgent);background:#FEF3EF}
.field .err-msg{display:none;font-size:12px;color:var(--urgent);margin-top:6px}
.field.error .err-msg{display:block}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.7;color:var(--muted)}
.check-row input{margin-top:5px;width:16px;height:16px;accent-color:var(--brand);flex:0 0 16px}
.form-row2{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:640px){.form-row2{grid-template-columns:1fr 1fr}}
.form-note{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand);color:#fff;padding:60px 0 0}
@media (min-width:1024px){.site-footer{padding:76px 0 0}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}}
.site-footer .brand-name{color:#fff}
.site-footer .brand-mark{color:#fff}
.footer-desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.75);margin:14px 0 0;max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px;letter-spacing:.02em}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.78);line-height:1.7}
.footer-col a:hover{color:var(--accent)}
.footer-col p{font-size:13.5px;color:rgba(255,255,255,.78);line-height:1.9;margin:0 0 8px}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.16);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.62);line-height:1.8;
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .card:hover,.cat-card:hover,.tier:hover,.plan-card:hover,.post-card:hover .post-cover img{transform:none !important}
}

/* roulang page: article */
:root{
  --brand:#0E4F45;
  --brand-600:#0A3A32;
  --brand-050:#E9F2EF;
  --accent:#FF9F1C;
  --accent-050:#FFF4E3;
  --urgent:#E4572E;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --surface-2:#F0F4F1;
  --ink:#14201D;
  --muted:#5B6B66;
  --line:#DCE5E1;
  --ok:#1F9D6B;
  --info:#2C7BE5;
  --r-btn:12px;
  --r-card:18px;
  --r-input:10px;
  --r-badge:8px;
  --r-img:16px;
  --r-num:14px;
  --s1:0 1px 2px rgba(20,32,29,.05);
  --s2:0 8px 24px -12px rgba(20,32,29,.16);
  --s3:0 20px 48px -20px rgba(20,32,29,.24);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.3;letter-spacing:-0.01em;}
p{margin:0;}
::selection{background:var(--brand-050);color:var(--brand-600);}
.num{font-variant-numeric:tabular-nums;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--s2);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-050);transform:translateY(-1px);}
.btn-accent{background:var(--accent);color:var(--ink);}
.btn-accent:hover{background:#F08F0A;transform:translateY(-1px);box-shadow:var(--s2);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-lg{height:48px;padding:0 28px;}
.btn:focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;}
.btn[disabled]{opacity:.45;pointer-events:none;}

.link-ghost{
  font-size:14px;color:var(--muted);padding:8px 10px;border-radius:10px;
}
.link-ghost:hover{color:var(--brand);background:var(--brand-050);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  height:68px;display:flex;align-items:center;
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--s1);}
.header-inner{display:flex;align-items:center;gap:24px;width:100%;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:32px;height:32px;color:var(--brand);flex:0 0 auto;}
.brand-name{font-size:19px;font-weight:800;color:var(--brand);letter-spacing:-0.02em;}
.main-nav{margin-left:8px;}
.main-nav ul{display:flex;align-items:center;gap:2px;list-style:none;}
.main-nav a{
  display:inline-block;position:relative;padding:8px 12px;font-size:14.5px;color:var(--muted);border-radius:10px;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-050);}
.main-nav a.active{color:var(--brand);font-weight:700;}
.main-nav a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);
}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px;}

.cmd-search{position:relative;width:300px;height:40px;}
.cmd-search input{
  width:100%;height:40px;border-radius:var(--r-input);
  background:var(--surface-2);border:1px solid transparent;
  padding:0 40px 0 38px;font-size:14px;outline:none;
  transition:border-color var(--ease),background-color var(--ease);
}
.cmd-search input::placeholder{color:#93A29D;}
.cmd-search input:focus{border-color:var(--brand);background:#fff;}
.cmd-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);pointer-events:none;}
.cmd-kbd{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  width:22px;height:22px;border-radius:6px;background:#fff;border:1px solid var(--line);
  color:var(--muted);font-size:12px;line-height:20px;text-align:center;pointer-events:none;
}
.cmd-panel{
  position:absolute;top:calc(100% + 10px);left:0;right:0;
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--s2);
  padding:12px;display:none;
}
.cmd-search:focus-within .cmd-panel{display:block;}
.cmd-title{font-size:12px;color:var(--muted);letter-spacing:.06em;margin-bottom:6px;}
.cmd-panel a{display:block;font-size:14px;color:var(--ink);padding:7px 10px;border-radius:10px;}
.cmd-panel a:hover{background:var(--brand-050);color:var(--brand);}
.cmd-hint{font-size:12px;color:var(--muted);border-top:1px dashed var(--line);margin-top:8px;padding-top:8px;}

.menu-btn{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;
}
.menu-btn:hover{border-color:var(--brand);}
.menu-btn span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;}
.menu-btn span::before{top:-5px;}
.menu-btn span::after{top:5px;}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,32,29,.35);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);z-index:70;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:80;
  transform:translateX(100%);transition:transform var(--ease);
  display:flex;flex-direction:column;padding:20px;gap:16px;overflow-y:auto;
  box-shadow:var(--s3);
}
.drawer.open{transform:none;}
.drawer-search{width:100%;height:44px;border-radius:var(--r-input);background:var(--surface-2);border:1px solid transparent;padding:0 14px;font-size:15px;outline:none;}
.drawer-search:focus{border-color:var(--brand);background:#fff;}
.drawer-nav{list-style:none;display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{display:block;padding:12px 12px;border-radius:12px;font-size:16px;color:var(--ink);}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--brand-050);color:var(--brand);font-weight:600;}
.drawer-close{align-self:flex-end;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:18px;line-height:1;color:var(--muted);}
.drawer-cta{margin-top:auto;}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;
  border-bottom:1px solid var(--line);
  background-color:var(--surface-2);
  background-image:linear-gradient(180deg,rgba(246,245,241,.93),rgba(246,245,241,.99)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:36px 0 46px;
}
.crumbs{font-size:14px;color:var(--muted);}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:#A9B6B2;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .current{color:var(--ink);}

.article-hero h1{
  margin-top:22px;
  font-size:clamp(26px,4vw,40px);
  font-weight:800;line-height:1.28;letter-spacing:-0.02em;
  max-width:900px;
}
.meta-row{
  margin-top:18px;display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--muted);
}
.meta-row .sep{width:1px;height:12px;background:var(--line);}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-badge);
  background:var(--brand-050);color:var(--brand);font-size:12.5px;font-weight:600;
}
.badge-accent{background:var(--accent-050);color:#9A5A00;}

/* ---------- 布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:40px;
  padding-top:44px;padding-bottom:80px;
}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,780px) 300px;gap:56px;justify-content:center;}
}
.article-main{min-width:0;}

/* 导语 */
.lead{
  background:var(--brand-050);
  border-left:4px solid var(--brand);
  border-radius:var(--r-btn);
  padding:20px 22px;
  font-size:15.5px;line-height:1.85;color:#20423B;
}
.lead strong{color:var(--brand-600);}

/* 正文 */
.article-body{margin-top:34px;font-size:16px;line-height:1.9;color:var(--ink);}
.article-body > * + *{margin-top:18px;}
.article-body p{margin:0 0 18px;font-size:16px;line-height:1.9;}
.article-body h2{
  position:relative;margin:44px 0 16px;padding-left:16px;
  font-size:clamp(22px,2.6vw,28px);font-weight:700;line-height:1.35;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--brand);
}
.article-body h2:first-child{margin-top:8px;}
.article-body h3{
  margin:30px 0 12px;font-size:20px;font-weight:600;line-height:1.4;
}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:0;list-style:none;}
.article-body li{position:relative;padding-left:22px;margin-bottom:10px;line-height:1.85;}
.article-body ul > li::before{
  content:"";position:absolute;left:2px;top:11px;width:8px;height:8px;border-radius:2px;background:var(--accent);
}
.article-body ol{counter-reset:li;}
.article-body ol > li{counter-increment:li;padding-left:30px;}
.article-body ol > li::before{
  content:counter(li);
  position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:12px;font-weight:700;line-height:20px;text-align:center;
}
.article-body a{color:var(--brand);border-bottom:1px dashed var(--brand);}
.article-body a:hover{color:var(--brand-600);border-bottom-style:solid;}
.article-body strong{font-weight:700;color:var(--brand-600);}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--surface-2);
  border-left:3px solid #B9C8C3;border-radius:0 12px 12px 0;
  color:#3A4C47;font-size:15.5px;line-height:1.85;
}
.article-body img{border-radius:12px;margin:22px 0;width:100%;}
.article-body figure{margin:22px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;line-height:1.7;}
.article-body hr{border:none;border-top:1px dashed var(--line);margin:30px 0;}
.table-scroll{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:12px;background:#fff;}
.article-body table{width:100%;border-collapse:collapse;min-width:560px;font-size:14.5px;}
.article-body thead th{
  position:sticky;top:0;background:var(--brand-050);color:var(--brand-600);
  font-weight:700;text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.75;}
.article-body tbody tr:nth-child(even){background:var(--surface-2);}
.article-body code{background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:14px;}

/* 标签 */
.tag-row{margin-top:40px;padding-top:22px;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tag-row .label{font-size:13px;color:var(--muted);margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-badge);
  background:#fff;border:1px solid var(--line);color:var(--muted);font-size:13px;
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-050);}

/* 空态 */
.empty-state{
  margin-top:34px;border:1px dashed var(--line);border-radius:var(--r-card);
  background:#fff;padding:48px 24px;text-align:center;
}
.empty-title{font-size:20px;font-weight:700;}
.empty-desc{font-size:14px;color:var(--muted);margin:10px 0 22px;}

/* 板块标题 */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;}
.section-head h2{font-size:clamp(20px,2.2vw,24px);font-weight:700;}
.section-head .more{font-size:14px;color:var(--brand);}
.section-head .more:hover{color:var(--brand-600);}

/* 相关推荐卡片 */
.related{margin-top:56px;}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--s1);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--s2);transform:translateY(-2px);border-color:#C9D8D3;}
.card-cover{border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:var(--surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;}
.card h3{margin-top:14px;font-size:18px;font-weight:600;line-height:1.45;}
.card h3 a{color:var(--ink);}
.card h3 a:hover{color:var(--brand);}
.card p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted);}
.card-meta{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);}
.card-meta .go{color:var(--brand);font-weight:600;}

/* 上/下一篇 */
.pager{margin-top:32px;display:grid;grid-template-columns:1fr;gap:16px;}
@media (min-width:768px){.pager{grid-template-columns:1fr 1fr;}}
.pager-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;
  box-shadow:var(--s1);transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.pager-card:hover{box-shadow:var(--s2);transform:translateY(-2px);border-color:#C9D8D3;}
.pager-card .k{font-size:12.5px;color:var(--muted);}
.pager-card .t{margin-top:8px;font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;}
.pager-card:hover .t{color:var(--brand);}

/* 侧栏 */
.article-side{min-width:0;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--s1);
}
.side-card + .side-card{margin-top:20px;}
.side-card h3{font-size:15px;font-weight:700;margin-bottom:14px;}
.side-list{list-style:none;}
.side-list li + li{margin-top:2px;}
.side-list a{display:block;font-size:14px;color:var(--muted);padding:8px 10px;border-radius:10px;}
.side-list a:hover{background:var(--brand-050);color:var(--brand);}
.info-line{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--muted);padding:9px 0;border-bottom:1px dashed var(--line);}
.info-line:last-child{border-bottom:none;}
.info-line b{color:var(--ink);font-weight:600;}
.side-cta{background:var(--brand);color:#fff;border-color:transparent;}
.side-cta h3{color:#fff;}
.side-cta p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.82);margin-bottom:14px;}

/* CTA 条 */
.cta-strip{
  background:var(--brand-050);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:36px 0;
}
.cta-strip .inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;}
.cta-strip h2{font-size:clamp(19px,2.2vw,24px);font-weight:700;color:var(--brand-600);}
.cta-strip p{font-size:14px;color:#3A524C;margin-top:6px;}

/* 页脚 */
.site-footer{background:var(--brand);color:rgba(255,255,255,.85);padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-mark{color:#fff;}
.footer-desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.75);margin-top:14px;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:8px;}
.site-footer a{font-size:13px;line-height:1.7;color:rgba(255,255,255,.78);}
.site-footer a:hover{color:var(--accent);}
.footer-col p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.78);}
.footer-bottom{
  margin-top:46px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(255,255,255,.62);
}

/* 响应式 */
@media (max-width:1023px){
  .main-nav{display:none;}
  .cmd-search{display:none;}
  .header-right .link-ghost{display:none;}
  .header-right .btn-primary{display:none;}
  .menu-btn{display:inline-flex;}
  .site-header{height:60px;}
}
@media (max-width:639px){
  .article-layout{padding-top:28px;padding-bottom:56px;gap:32px;}
  .article-hero{padding:24px 0 34px;}
  .lead{padding:16px 18px;font-size:15.5px;}
  .article-body{font-size:15.5px;}
  .article-body p{font-size:15.5px;}
  .cta-strip .inner{flex-direction:column;align-items:flex-start;}
  .cta-strip .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --brand:#0E4F45;
  --brand-600:#0A3A32;
  --brand-050:#E9F2EF;
  --accent:#FF9F1C;
  --accent-050:#FFF4E3;
  --urgent:#E4572E;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --surface-2:#F0F4F1;
  --ink:#14201D;
  --muted:#5B6B66;
  --line:#DCE5E1;
  --ok:#1F9D6B;
  --info:#2C7BE5;
  --r-btn:12px;
  --r-card:18px;
  --r-input:10px;
  --r-badge:8px;
  --r-img:16px;
  --r-num:14px;
  --s1:0 1px 2px rgba(20,32,29,.05);
  --s2:0 8px 24px -12px rgba(20,32,29,.16);
  --s3:0 20px 48px -20px rgba(20,32,29,.24);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--s1);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:60px;}
@media (min-width:1024px){.header-inner{height:68px;gap:28px;}}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{width:32px;height:32px;color:var(--brand);flex:none;}
.brand-name{font-size:18px;font-weight:800;color:var(--brand);letter-spacing:-.01em;white-space:nowrap;}
.main-nav{display:none;}
@media (min-width:1024px){.main-nav{display:block;flex:1;}}
.main-nav ul{display:flex;align-items:center;gap:26px;}
.main-nav a{
  display:inline-block;position:relative;padding:6px 2px;font-size:15px;color:var(--ink);
  transition:color var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:14px;}
.cmd-search{display:none;position:relative;}
@media (min-width:1024px){.cmd-search{display:block;width:300px;}}
.cmd-search .search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);pointer-events:none;}
.cmd-search input{
  width:100%;height:40px;padding:0 42px 0 36px;border:1px solid var(--line);border-radius:var(--r-input);
  background:var(--surface-2);font-size:14px;transition:border-color var(--ease),background var(--ease);
}
.cmd-search input::placeholder{color:#8A9894;}
.cmd-search input:focus{outline:none;border:2px solid var(--brand);background:var(--brand-050);}
.cmd-search .kbd{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  font-size:12px;color:var(--muted);background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-badge);padding:1px 7px;line-height:1.6;
}
.search-panel{
  position:absolute;top:calc(100% + 8px);left:0;right:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s2);padding:10px;opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.cmd-search:focus-within .search-panel{opacity:1;visibility:visible;transform:translateY(0);}
.search-panel a{display:block;padding:7px 10px;border-radius:var(--r-badge);font-size:14px;color:var(--ink);transition:background var(--ease),color var(--ease);}
.search-panel a:hover{background:var(--brand-050);color:var(--brand);}
.search-panel .panel-tip{display:block;padding:8px 10px 4px;font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);margin-top:6px;}
.ghost-link{display:none;font-size:14px;color:var(--muted);transition:color var(--ease);white-space:nowrap;}
@media (min-width:1024px){.ghost-link{display:inline-block;}}
.ghost-link:hover{color:var(--brand);}
.header-cta{display:none;}
@media (min-width:1024px){.header-cta{display:inline-flex;}}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border:1px solid var(--line);border-radius:var(--r-input);background:var(--surface);cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand);}
@media (min-width:1024px){.menu-toggle{display:none;}}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--brand);border-radius:2px;position:relative;}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--brand);border-radius:2px;}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(20,32,29,.42);opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:70;}
.drawer-mask.open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:var(--surface);
  z-index:80;transform:translateX(100%);transition:transform var(--ease);
  display:flex;flex-direction:column;padding:20px;box-shadow:var(--s3);
}
.mobile-drawer.open{transform:translateX(0);}
.mobile-drawer .drawer-title{font-size:13px;color:var(--muted);margin-bottom:8px;}
.drawer-search{position:relative;margin-bottom:18px;}
.drawer-search input{width:100%;height:44px;padding:0 14px 0 38px;border:1px solid var(--line);border-radius:var(--r-input);background:var(--surface-2);font-size:14.5px;}
.drawer-search input:focus{outline:none;border:2px solid var(--brand);background:var(--brand-050);}
.drawer-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);}
.drawer-nav{flex:1;overflow-y:auto;}
.drawer-nav a{display:block;padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line);transition:color var(--ease),padding-left var(--ease);}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand);padding-left:8px;font-weight:600;}
.drawer-foot{padding-top:14px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;justify-content:center;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;background:transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--s2);}
.btn:active{transform:translateY(0);box-shadow:none;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-600);}
.btn-secondary{border-color:var(--brand);color:var(--brand);}
.btn-secondary:hover{background:var(--brand-050);}
.btn-accent{background:var(--accent);color:var(--ink);}
.btn-accent:hover{background:#F08F0A;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-lg{height:48px;}

/* ---------- 通用标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-badge);
  font-size:13px;font-weight:600;background:var(--brand-050);color:var(--brand);line-height:1.7;
}
.badge-accent{background:var(--accent-050);color:#B36A00;}
.tag{
  display:inline-block;padding:3px 10px;border-radius:var(--r-badge);font-size:12.5px;
  background:var(--surface-2);color:var(--muted);border:1px solid var(--line);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;color:var(--muted);}
.breadcrumb li{display:flex;align-items:center;gap:6px;}
.breadcrumb li+li::before{content:"/";color:#B7C4BF;}
.breadcrumb a{transition:color var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb [aria-current="page"]{color:var(--ink);}

/* ---------- 板块 ---------- */
.section{padding:64px 0;}
@media (min-width:1024px){.section{padding:104px 0;}}
.section-tight{padding:48px 0;}
@media (min-width:1024px){.section-tight{padding:72px 0;}}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-kicker{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);text-transform:uppercase;margin-bottom:10px;}
h2{font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.sec-head h2{position:relative;padding-left:16px;}
.sec-head h2::before{content:"";position:absolute;left:0;top:.18em;width:4px;height:24px;border-radius:2px;background:var(--brand);}
.sec-head.center h2{padding-left:0;padding-top:18px;}
.sec-head.center h2::before{left:50%;top:0;transform:translateX(-50%);width:32px;height:4px;border-radius:2px;}
.sec-desc{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.85;}

/* ---------- Hero ---------- */
.hero{padding:32px 0 64px;}
@media (min-width:1024px){.hero{padding:48px 0 96px;}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:6fr 6fr;gap:48px;}}
.hero h1{
  font-size:clamp(28px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:-.02em;
  margin:18px 0 18px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{font-size:16px;line-height:1.9;color:var(--muted);max-width:56ch;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-media{position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--s2);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
@media (min-width:1024px){.hero-media img{aspect-ratio:16/10;}}
.hero-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.28) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.28) 1px,transparent 1px);
  background-size:44px 44px;opacity:.22;mix-blend-mode:overlay;
}
.hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:20px 0;margin-top:36px;padding-top:28px;border-top:1px solid var(--line);}
@media (min-width:768px){.hero-facts{grid-template-columns:repeat(4,1fr);}}
.hero-facts .fact{padding-right:16px;border-right:1px solid var(--line);}
.hero-facts .fact:nth-child(2n){border-right:none;}
@media (min-width:768px){.hero-facts .fact:nth-child(2n){border-right:1px solid var(--line);} .hero-facts .fact:last-child{border-right:none;}}
.fact-num{font-size:24px;font-weight:700;color:var(--brand);line-height:1.3;}
.fact-label{font-size:13px;color:var(--muted);line-height:1.7;margin-top:2px;}

/* ---------- 卡片通用 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--s1);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
@media (max-width:639px){.card{padding:20px;}}
.card:hover{box-shadow:var(--s2);transform:translateY(-2px);}
.card h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:8px;}
.card p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- 类目矩阵 2×2 ---------- */
.cat-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){.cat-grid{grid-template-columns:repeat(2,1fr);gap:24px;}}
.cat-card{display:flex;flex-direction:column;height:100%;}
.cat-icon{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border:1px solid var(--brand);border-radius:14px;color:var(--brand);background:var(--brand-050);margin-bottom:16px;
}
.cat-icon svg{width:24px;height:24px;}
.cat-card .cat-list{margin-top:16px;display:grid;gap:8px;}
.cat-card .cat-list li{position:relative;padding-left:16px;font-size:14px;color:var(--ink);line-height:1.75;}
.cat-card .cat-list li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--accent);border-radius:1px;}
.cat-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px dashed var(--brand);padding-bottom:2px;align-self:flex-start;transition:color var(--ease);}
.cat-link:hover{color:var(--brand-600);}
.cat-link svg{width:14px;height:14px;transition:transform var(--ease);}
.cat-link:hover svg{transform:translateX(3px);}

/* ---------- 参数表 ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);box-shadow:var(--s1);}
table.spec-table{width:100%;min-width:720px;border-collapse:collapse;}
.spec-table caption{text-align:left;padding:20px 24px 8px;font-size:15px;font-weight:600;color:var(--ink);}
.spec-table th,.spec-table td{padding:15px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:middle;}
.spec-table thead th{
  background:var(--surface-2);font-weight:600;font-size:14px;color:var(--ink);white-space:nowrap;
  position:sticky;top:0;z-index:2;
}
.spec-table tbody tr:nth-child(even){background:var(--surface-2);}
.spec-table tbody tr:last-child td{border-bottom:none;}
.spec-table tbody th{font-weight:600;color:var(--ink);}
.spec-table .cell-strong{color:var(--brand);font-weight:600;font-variant-numeric:tabular-nums;}
.table-note{margin-top:12px;font-size:13px;color:var(--muted);line-height:1.7;}

/* ---------- 图文区 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;}
@media (min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:56px;}}
.split-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--s2);}
.split h2{margin-bottom:16px;}
.split p{font-size:15.5px;color:var(--muted);line-height:1.9;}
.check-list{margin-top:22px;display:grid;gap:12px;}
.check-list li{position:relative;padding-left:28px;font-size:15px;line-height:1.8;}
.check-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:14px;height:14px;border-radius:50%;
  background:var(--brand-050);border:1px solid var(--brand);
}
.check-list li::after{content:"";position:absolute;left:5px;top:calc(.62em + 4px);width:6px;height:3px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg);}
.split-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 清单两列 ---------- */
.list-duo{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){.list-duo{grid-template-columns:1fr 1fr;gap:24px;}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--s1);}
.panel h3{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:10px;}
.panel h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:none;}
.panel ul li{padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--ink);line-height:1.8;}
.panel ul li:last-child{border-bottom:none;}
.panel ul li span{color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--s1);overflow:hidden;transition:border-color var(--ease),background var(--ease);
}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:17px;font-weight:600;cursor:pointer;list-style:none;transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary .chev{width:18px;height:18px;flex:none;color:var(--brand);transition:transform var(--ease);}
.faq-item[open]{border-color:var(--brand);background:var(--brand-050);}
.faq-item[open] summary .chev{transform:rotate(180deg);}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--brand-050);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px 28px;display:grid;gap:20px;align-items:center;
}
@media (min-width:1024px){.cta-band{grid-template-columns:1fr auto;padding:40px 44px;gap:32px;}}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);padding-left:0;}
.cta-band h2::before{display:none;}
.cta-band p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.85;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand);color:rgba(255,255,255,.86);padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;}}
.site-footer .brand{color:#fff;}
.site-footer .brand-mark{color:#fff;}
.site-footer .brand-name{color:#fff;}
.footer-desc{margin-top:14px;font-size:13px;line-height:1.9;color:rgba(255,255,255,.72);max-width:38ch;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul{display:grid;gap:8px;}
.footer-col a{font-size:13px;line-height:1.7;color:rgba(255,255,255,.78);transition:color var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-col p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.78);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.66);line-height:1.8;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;scroll-behavior:auto !important;}
  .btn:hover,.card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
    --brand:#0E4F45;
    --brand-600:#0A3A32;
    --brand-050:#E9F2EF;
    --accent:#FF9F1C;
    --accent-050:#FFF4E3;
    --urgent:#E4572E;
    --bg:#F6F5F1;
    --surface:#FFFFFF;
    --surface-2:#F0F4F1;
    --ink:#14201D;
    --muted:#5B6B66;
    --line:#DCE5E1;
    --success:#1F9D6B;
    --info:#2C7BE5;

    --r-btn:12px;
    --r-card:18px;
    --r-input:10px;
    --r-badge:8px;
    --r-img:16px;
    --r-num:14px;

    --s1:0 1px 2px rgba(20,32,29,.05);
    --s2:0 8px 24px -12px rgba(20,32,29,.16);
    --s3:0 20px 48px -20px rgba(20,32,29,.24);

    --tr:200ms ease-out;
    --container:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,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,select,textarea{font:inherit;color:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  b,strong{font-weight:700;}

  :focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;border-radius:4px;}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
  @media (min-width:1024px){.container{padding:0 32px;}}
  @media (min-width:1280px){.container{max-width:1200px;}}

  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.88);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow var(--tr);
  }
  .site-header.is-scrolled{box-shadow:var(--s1);}
  .header-inner{display:flex;align-items:center;gap:20px;height:68px;}
  @media (max-width:767px){.header-inner{height:60px;gap:12px;}}

  .brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--brand);font-size:19px;letter-spacing:-.01em;flex:none;}
  .brand-mark{width:30px;height:30px;color:var(--brand);flex:none;}
  .brand-name{white-space:nowrap;}

  .main-nav{flex:1;display:flex;justify-content:center;}
  .main-nav ul{display:flex;align-items:center;gap:2px;}
  .main-nav a{
    display:inline-block;padding:9px 12px;font-size:15px;font-weight:500;color:var(--ink);
    border-bottom:2px solid transparent;border-radius:8px;
    transition:color var(--tr),background-color var(--tr),border-color var(--tr);
    white-space:nowrap;
  }
  .main-nav a:hover{color:var(--brand);background:var(--brand-050);}
  .main-nav a.active{color:var(--brand);font-weight:700;border-bottom-color:var(--brand);}

  .header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}

  .cmd-search{position:relative;width:300px;}
  .cmd-search .search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);pointer-events:none;}
  .cmd-search input{
    width:100%;height:40px;border-radius:var(--r-input);background:var(--surface-2);
    border:1px solid transparent;padding:0 40px 0 36px;font-size:14px;
    transition:border-color var(--tr),background-color var(--tr),box-shadow var(--tr);
  }
  .cmd-search input::placeholder{color:var(--muted);}
  .cmd-search input:focus{outline:none;border-color:var(--brand);background:var(--brand-050);box-shadow:0 0 0 3px rgba(14,79,69,.12);}
  .cmd-search .kbd{
    position:absolute;right:10px;top:50%;transform:translateY(-50%);
    font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:6px;
    padding:1px 6px;background:#fff;line-height:1.5;
  }
  .cmd-panel{
    position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;
    border:1px solid var(--line);border-radius:14px;box-shadow:var(--s2);padding:12px;
    opacity:0;visibility:hidden;transform:translateY(-4px);
    transition:opacity var(--tr),transform var(--tr),visibility var(--tr);
  }
  .cmd-search:focus-within .cmd-panel{opacity:1;visibility:visible;transform:translateY(0);}
  .cmd-panel .panel-title{font-size:12px;color:var(--muted);padding:0 8px 8px;}
  .cmd-panel a{display:block;padding:8px;border-radius:8px;font-size:14px;color:var(--ink);transition:background-color var(--tr),color var(--tr);}
  .cmd-panel a:hover{background:var(--brand-050);color:var(--brand);}
  .cmd-panel .panel-hint{border-top:1px dashed var(--line);margin-top:8px;padding:10px 8px 2px;font-size:12px;color:var(--muted);}

  .link-btn{font-size:14px;font-weight:600;color:var(--brand);padding:8px 10px;border-radius:8px;transition:background-color var(--tr);}
  .link-btn:hover{background:var(--brand-050);}

  .menu-toggle{
    display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    background:#fff;align-items:center;justify-content:center;cursor:pointer;flex:none;
    transition:background-color var(--tr),border-color var(--tr);
  }
  .menu-toggle:hover{background:var(--brand-050);border-color:var(--brand);}
  .menu-toggle svg{width:20px;height:20px;color:var(--brand);}

  @media (max-width:1023px){
    .main-nav{display:none;}
    .cmd-search{display:none;}
    .menu-toggle{display:inline-flex;}
    .header-cta{display:none;}
  }

  /* ---------- 移动抽屉 ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(20,32,29,.42);z-index:80;
    opacity:0;visibility:hidden;transition:opacity var(--tr),visibility var(--tr);
  }
  .drawer-mask.open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:#fff;z-index:90;
    transform:translateX(100%);transition:transform 240ms ease-out;
    display:flex;flex-direction:column;gap:16px;padding:20px;overflow-y:auto;box-shadow:var(--s3);
  }
  .drawer.open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;display:grid;place-items:center;}
  .drawer-close:hover{background:var(--brand-050);}
  .drawer-search{position:relative;}
  .drawer-search input{width:100%;height:44px;border-radius:var(--r-input);background:var(--surface-2);border:1px solid var(--line);padding:0 14px 0 38px;font-size:15px;}
  .drawer-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);}
  .drawer-nav a{display:block;padding:14px 12px;border-radius:12px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line);transition:background-color var(--tr),color var(--tr);}
  .drawer-nav a:hover{background:var(--brand-050);color:var(--brand);}
  .drawer-nav a.active{color:var(--brand);background:var(--brand-050);}
  .drawer-foot{margin-top:auto;padding-top:16px;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:background-color var(--tr),color var(--tr),border-color var(--tr),box-shadow var(--tr),transform var(--tr);
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--s2);}
  .btn-primary:active{transform:translateY(0);box-shadow:none;}
  .btn-ghost{background:transparent;border-color:var(--brand);color:var(--brand);}
  .btn-ghost:hover{background:var(--brand-050);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn-accent{background:var(--accent);color:var(--ink);border-color:transparent;}
  .btn-accent:hover{background:#F08F0B;transform:translateY(-1px);box-shadow:var(--s2);}
  .btn-accent:active{transform:translateY(0);}
  .btn-onbrand{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
  .btn-onbrand:hover{background:rgba(255,255,255,.14);transform:translateY(-1px);}
  .btn-lg{height:48px;}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

  /* ---------- 通用板块 ---------- */
  .section{padding:64px 0;}
  @media (min-width:1024px){.section{padding:104px 0;}}
  .section-tight{padding:48px 0;}
  @media (min-width:1024px){.section-tight{padding:72px 0;}}
  .section-alt{background:var(--surface-2);}

  .section-head{margin-bottom:32px;}
  @media (min-width:1024px){.section-head{margin-bottom:44px;}}
  .section-title{
    font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.3;
    padding-left:16px;border-left:4px solid var(--brand);
  }
  .section-title.rule-top{padding-left:0;border-left:0;padding-top:16px;position:relative;}
  .section-title.rule-top::before{
    content:"";position:absolute;top:0;left:0;width:32px;height:4px;border-radius:2px;background:var(--brand);
  }
  .section-desc{color:var(--muted);font-size:15px;line-height:1.85;margin-top:12px;max-width:64em;}
  .head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{font-size:14px;color:var(--muted);margin-bottom:20px;}
  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
  .breadcrumb li{display:flex;align-items:center;gap:8px;}
  .breadcrumb li+li::before{content:"/";color:#B9C7C2;}
  .breadcrumb a{transition:color var(--tr);}
  .breadcrumb a:hover{color:var(--brand);}
  .breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600;}

  /* ---------- 首屏 ---------- */
  .page-hero{padding:40px 0 8px;}
  @media (min-width:1024px){.page-hero{padding:64px 0 16px;}}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center;}
  @media (min-width:1024px){.hero-grid{grid-template-columns:1fr 1fr;gap:56px;}}
  .hero-media{order:-1;position:relative;}
  @media (min-width:1024px){.hero-media{order:0;}}
  .hero-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--s2);
  }
  @media (min-width:1024px){.hero-media img{aspect-ratio:16/10;}}
  .hero-media::after{
    content:"";position:absolute;inset:0;border-radius:var(--r-img);pointer-events:none;
    background-image:radial-gradient(rgba(14,79,69,.55) 1px,transparent 1px);
    background-size:14px 14px;opacity:.06;
  }
  .hero-title{
    font-size:clamp(28px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:-.02em;
    margin-top:18px;
  }
  .hero-sub{font-size:16.5px;line-height:1.85;color:var(--muted);margin-top:18px;max-width:40em;}
  @media (min-width:768px){.hero-sub{font-size:17px;}}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px;font-size:13px;color:var(--muted);}
  .hero-meta span{padding-right:14px;border-right:1px solid var(--line);}
  .hero-meta span:last-child{border-right:0;padding-right:0;}

  .tag{
    display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-badge);
    font-size:13px;font-weight:600;background:var(--accent-050);color:var(--accent);line-height:1.5;
  }
  .tag-brand{background:var(--brand-050);color:var(--brand);}
  .tag-line{background:#fff;border:1px solid var(--line);color:var(--muted);}

  /* ---------- 指标条 ---------- */
  .metrics{
    display:grid;grid-template-columns:1fr 1fr;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--s1);overflow:hidden;
  }
  @media (min-width:768px){.metrics{grid-template-columns:repeat(4,1fr);}}
  .metric{padding:22px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
  @media (min-width:768px){
    .metric{border-bottom:0;padding:26px 24px;}
    .metric:last-child{border-right:0;}
  }
  .metric:nth-child(2n){border-right:0;}
  @media (min-width:768px){.metric:nth-child(2n){border-right:1px solid var(--line);}.metric:last-child{border-right:0;}}
  .metric b{display:block;font-size:24px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.3;}
  .metric span{display:block;font-size:13px;color:var(--muted);line-height:1.7;margin-top:4px;}

  /* ---------- 卡片 ---------- */
  .card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--s1);
    transition:box-shadow var(--tr),transform var(--tr),border-color var(--tr);
  }
  @media (max-width:520px){.card{padding:20px;}}
  .card:hover{box-shadow:var(--s2);transform:translateY(-2px);}

  /* 套餐卡 */
  .plan-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:640px){.plan-grid{grid-template-columns:1fr 1fr;}}
  @media (min-width:1024px){.plan-grid{grid-template-columns:repeat(3,1fr);}}
  .plan-card{
    position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px 24px;box-shadow:var(--s1);display:flex;flex-direction:column;gap:16px;
    transition:box-shadow var(--tr),transform var(--tr),border-color var(--tr);
  }
  .plan-card:hover{box-shadow:var(--s2);transform:translateY(-2px);}
  .plan-card.featured{
    border-color:var(--brand);box-shadow:var(--s2);
    background:linear-gradient(180deg,var(--brand-050) 0%,#fff 46%);
  }
  .plan-badge{
    position:absolute;top:-12px;left:24px;background:var(--accent);color:var(--ink);
    font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--r-badge);line-height:1.6;
  }
  .plan-name{font-size:18px;font-weight:700;}
  .plan-price{font-size:30px;font-weight:800;color:var(--urgent);font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.3;}
  .plan-price small{font-size:13px;font-weight:500;color:var(--muted);margin-left:6px;letter-spacing:0;}
  .plan-list{display:flex;flex-direction:column;gap:8px;margin-top:2px;}
  .plan-list li{position:relative;padding-left:18px;font-size:14px;line-height:1.75;color:var(--ink);}
  .plan-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;border-radius:2px;background:var(--brand);}
  .plan-card .btn{margin-top:auto;width:100%;}

  /* ---------- 对照表 ---------- */
  .table-wrap{
    border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--s1);overflow-x:auto;
  }
  table.pricing{width:100%;border-collapse:collapse;font-size:14.5px;min-width:820px;}
  .pricing caption{text-align:left;padding:18px 20px 0;font-size:13px;color:var(--muted);}
  .pricing thead th{
    position:sticky;top:0;z-index:2;background:var(--surface-2);
    padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);
    font-weight:700;color:var(--ink);white-space:nowrap;
  }
  .pricing thead th:first-child{text-align:left;}
  .pricing tbody th{
    text-align:left;font-weight:600;color:var(--ink);
    padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
  }
  .pricing tbody td{
    text-align:center;color:var(--muted);padding:14px 18px;border-bottom:1px solid var(--line);
  }
  .pricing tbody tr:nth-child(even){background:var(--surface-2);}
  .pricing tbody tr:last-child th,.pricing tbody tr:last-child td{border-bottom:0;}
  .pricing .price{color:var(--urgent);font-weight:700;font-variant-numeric:tabular-nums;}
  .pricing tbody tr td.is-featured,.pricing thead th.is-featured{background:rgba(233,242,239,.85);}
  .table-note{font-size:13px;line-height:1.8;color:var(--muted);margin-top:14px;max-width:70em;}

  .mobile-plans{display:none;}
  @media (max-width:1023px){
    .desktop-table{display:none;}
    .mobile-plans{display:grid;gap:20px;}
  }
  .mobile-plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--s1);}
  .mobile-plan.is-featured{border-color:var(--brand);box-shadow:var(--s2);}
  .mobile-plan h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:12px;}
  .mobile-plan .row{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;}
  .mobile-plan .row:last-child{border-bottom:0;}
  .mobile-plan .row dt{color:var(--muted);flex:none;}
  .mobile-plan .row dd{margin:0;text-align:right;font-weight:600;color:var(--ink);}
  .mobile-plan .row dd.price{color:var(--urgent);font-variant-numeric:tabular-nums;}

  /* ---------- 要点卡网格 ---------- */
  .info-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:640px){.info-grid{grid-template-columns:1fr 1fr;}}
  @media (min-width:1024px){.info-grid{grid-template-columns:repeat(4,1fr);}}
  .info-icon{
    width:44px;height:44px;border-radius:12px;background:var(--brand-050);color:var(--brand);
    display:grid;place-items:center;margin-bottom:14px;
  }
  .info-icon svg{width:22px;height:22px;}
  .info-card h3{font-size:17px;font-weight:600;margin-bottom:8px;}
  .info-card p{font-size:14px;line-height:1.8;color:var(--muted);}

  /* ---------- 选档路径 ---------- */
  .path-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:768px){.path-grid{grid-template-columns:repeat(3,1fr);}}
  .path-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:0 24px 24px;box-shadow:var(--s1);overflow:hidden;
    transition:box-shadow var(--tr),transform var(--tr);
  }
  .path-card:hover{box-shadow:var(--s2);transform:translateY(-2px);}
  .path-card .bar{height:6px;background:var(--brand);margin:0 -24px 20px;}
  .path-card:nth-child(2) .bar{background:#12705F;}
  .path-card:nth-child(3) .bar{background:var(--accent);}
  .path-num{
    display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;
    background:var(--brand-050);color:var(--brand);font-weight:700;font-size:14px;
    font-variant-numeric:tabular-nums;margin-bottom:12px;
  }
  .path-card h3{font-size:18px;font-weight:700;margin-bottom:8px;}
  .path-card p{font-size:14px;line-height:1.8;color:var(--muted);}
  .path-tags{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0;}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
    border-bottom:1px dashed var(--brand);padding-bottom:2px;margin-top:16px;
    transition:color var(--tr),border-color var(--tr);
  }
  .link-arrow:hover{color:var(--brand-600);border-color:var(--brand-600);}

  /* ---------- FAQ ---------- */
  .faq{display:grid;gap:12px;max-width:920px;}
  .faq details{
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:0 20px;box-shadow:var(--s1);
    transition:background-color var(--tr),border-color var(--tr),box-shadow var(--tr);
  }
  .faq details:hover{box-shadow:var(--s2);}
  .faq details[open]{background:var(--brand-050);border-color:#CFE0DA;}
  .faq summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 0;font-size:17px;font-weight:600;color:var(--ink);
  }
  .faq summary::-webkit-details-marker{display:none;}
  .faq summary .chev{width:18px;height:18px;flex:none;color:var(--brand);transition:transform var(--tr);}
  .faq details[open] summary .chev{transform:rotate(180deg);}
  .faq .answer{
    font-size:15px;line-height:1.85;color:var(--ink);
    border-top:1px dashed var(--line);padding:14px 0 20px;
  }

  /* ---------- CTA 条 ---------- */
  .cta-band{
    position:relative;overflow:hidden;background:var(--brand);color:#fff;
    border-radius:24px;padding:36px 32px;
    display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  }
  .cta-band::after{
    content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;
    border:1px solid rgba(255,255,255,.16);pointer-events:none;
  }
  .cta-band::before{
    content:"";position:absolute;left:-40px;bottom:-80px;width:200px;height:200px;border-radius:50%;
    border:1px solid rgba(255,255,255,.12);pointer-events:none;
  }
  .cta-band .cta-copy{position:relative;z-index:1;max-width:56em;}
  .cta-band h2{font-size:clamp(20px,2.4vw,28px);font-weight:700;line-height:1.35;}
  .cta-band p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.8);margin-top:10px;}
  .cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap;}
  @media (max-width:767px){
    .cta-band{padding:28px 22px;border-radius:20px;flex-direction:column;align-items:flex-start;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1;}
  }

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--brand);color:#fff;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:28px;padding:52px 0 32px;}
  @media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:72px 0 44px;}}
  .site-footer .brand{color:#fff;}
  .site-footer .brand-mark{color:#fff;}
  .footer-desc{font-size:13px;line-height:1.8;color:rgba(255,255,255,.72);margin-top:14px;max-width:34em;}
  .footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;color:#fff;}
  .footer-col ul li{margin-bottom:8px;}
  .footer-col a{font-size:13px;line-height:1.7;color:rgba(255,255,255,.78);transition:color var(--tr);}
  .footer-col a:hover{color:var(--accent);}
  .footer-col p{font-size:13px;line-height:1.75;color:rgba(255,255,255,.78);margin-bottom:8px;}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    border-top:1px solid rgba(255,255,255,.16);padding:20px 0 28px;
    font-size:13px;color:rgba(255,255,255,.62);
  }

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }

  @media (max-width:520px){
    body{font-size:15.5px;}
    .hero-title{font-size:clamp(26px,7.4vw,34px);}
  }

/* roulang page: category3 */
:root{
    --brand:#0E4F45;
    --brand-600:#0A3A32;
    --brand-050:#E9F2EF;
    --accent:#FF9F1C;
    --accent-050:#FFF4E3;
    --urgent:#E4572E;
    --bg:#F6F5F1;
    --surface:#FFFFFF;
    --surface-2:#F0F4F1;
    --ink:#14201D;
    --muted:#5B6B66;
    --line:#DCE5E1;
    --ok:#1F9D6B;
    --info:#2C7BE5;
    --r-btn:12px;
    --r-card:18px;
    --r-input:10px;
    --r-badge:8px;
    --r-img:16px;
    --r-num:14px;
    --s1:0 1px 2px rgba(20,32,29,.05);
    --s2:0 8px 24px -12px rgba(20,32,29,.16);
    --s3:0 20px 48px -20px rgba(20,32,29,.24);
    --ease:200ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  html body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.9;
    letter-spacing:.004em;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input,select,textarea{font:inherit;color:inherit}
  table{border-collapse:separate;border-spacing:0}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  :focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;border-radius:6px}

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

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.88);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow var(--ease);
  }
  .site-header.is-scrolled{box-shadow:var(--s1)}
  .header-inner{display:flex;align-items:center;gap:22px;height:68px}
  .brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);flex:0 0 auto}
  .brand-mark{width:30px;height:30px;flex:none;color:currentColor}
  .brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
  .main-nav{margin-right:auto}
  .main-nav ul{display:flex;align-items:center;gap:24px}
  .main-nav a{
    position:relative;display:inline-block;
    padding:6px 0;font-size:15px;font-weight:500;color:var(--muted);
    transition:color var(--ease);
  }
  .main-nav a::after{
    content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;
    background:var(--brand);transform:scaleX(0);transform-origin:left;
    transition:transform var(--ease);
  }
  .main-nav a:hover{color:var(--brand)}
  .main-nav a:hover::after{transform:scaleX(1)}
  .main-nav a.active{color:var(--brand);font-weight:600}
  .main-nav a.active::after{transform:scaleX(1)}

  .header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto}

  .cmd-search{position:relative;width:300px}
  .cmd-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);pointer-events:none}
  .cmd-search input{
    width:100%;height:40px;border-radius:var(--r-input);
    border:1px solid transparent;background:var(--surface-2);
    padding:0 40px 0 38px;font-size:14px;outline:none;
    transition:border-color var(--ease),background-color var(--ease),box-shadow var(--ease);
  }
  .cmd-search input::placeholder{color:#8C9A95}
  .cmd-search input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(14,79,69,.12)}
  .cmd-key{
    position:absolute;right:10px;top:50%;transform:translateY(-50%);
    font-size:12px;line-height:1;color:#8C9A95;background:#fff;
    border:1px solid var(--line);border-radius:6px;padding:3px 7px;
  }
  .cmd-panel{
    position:absolute;top:calc(100% + 8px);left:0;right:0;z-index:70;
    background:#fff;border:1px solid var(--line);border-radius:14px;
    box-shadow:var(--s2);padding:10px;
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .cmd-search:focus-within .cmd-panel{opacity:1;visibility:visible;transform:translateY(0)}
  .cmd-panel-title{font-size:12px;color:var(--muted);padding:4px 8px}
  .cmd-panel a{display:block;padding:8px 10px;border-radius:8px;font-size:14px;color:var(--ink);transition:background-color var(--ease),color var(--ease)}
  .cmd-panel a:hover{background:var(--brand-050);color:var(--brand)}
  .cmd-panel-note{margin-top:6px;padding:8px 10px;border-top:1px dashed var(--line);font-size:12px;color:var(--muted)}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;white-space:nowrap;
    transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  }
  .btn:active{transform:translateY(0) scale(.995)}
  .btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:var(--s1)}
  .btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--s2)}
  .btn-outline{border:1px solid var(--brand);color:var(--brand);background:transparent}
  .btn-outline:hover{background:var(--brand-050);transform:translateY(-1px);box-shadow:var(--s1)}
  .btn-accent{background:var(--accent);color:var(--ink);box-shadow:var(--s1)}
  .btn-accent:hover{background:#F08E0A;transform:translateY(-1px);box-shadow:var(--s2)}
  .btn-lg{height:48px;padding:0 28px;font-size:16px}
  .btn-sm{height:38px;padding:0 18px;font-size:14px}
  .btn-xs{height:32px;padding:0 12px;font-size:13px;border-radius:10px;font-weight:600}
  .btn-block{display:flex;width:100%}
  .ghost-btn{
    display:inline-flex;align-items:center;height:40px;padding:0 8px;
    font-size:14px;font-weight:600;color:var(--brand);
    border-bottom:1px dashed transparent;
    transition:color var(--ease),border-color var(--ease);
  }
  .ghost-btn:hover{color:var(--brand-600);border-bottom-color:var(--brand-600)}

  /* ---------- 移动端抽屉 ---------- */
  .nav-toggle{
    display:none;width:40px;height:40px;border-radius:10px;
    border:1px solid var(--line);background:#fff;color:var(--brand);
    align-items:center;justify-content:center;
  }
  .nav-toggle:hover{background:var(--brand-050)}
  .drawer-mask{
    position:fixed;inset:0;z-index:80;background:rgba(20,32,29,.42);
    opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .mobile-drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:84vw;max-width:360px;background:#fff;padding:20px;
    display:flex;flex-direction:column;gap:18px;
    box-shadow:var(--s3);transform:translateX(105%);
    transition:transform var(--ease);overflow-y:auto;
  }
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between}
  .drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);font-size:20px;line-height:1;color:var(--muted)}
  .drawer-close:hover{background:var(--surface-2);color:var(--brand)}
  .cmd-search--drawer{width:100%}
  .drawer-nav ul{display:grid;gap:4px}
  .drawer-nav a{
    display:block;padding:11px 12px;border-radius:10px;
    font-size:15px;font-weight:500;color:var(--ink);
    transition:background-color var(--ease),color var(--ease);
  }
  .drawer-nav a:hover{background:var(--brand-050);color:var(--brand)}
  .drawer-nav a.active{background:var(--brand-050);color:var(--brand);font-weight:700}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{padding:20px 0 0;font-size:14px;color:var(--muted)}
  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
  .breadcrumb li:not(:first-child)::before{content:"/";margin-right:8px;color:#B9C6C1}
  .breadcrumb a{color:var(--muted);transition:color var(--ease)}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .is-current{color:var(--brand);font-weight:600}

  /* ---------- Hero ---------- */
  .hero{position:relative;overflow:hidden;padding:40px 0 0}
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:radial-gradient(rgba(14,79,69,.1) 1px,transparent 1px);
    background-size:22px 22px;opacity:.5;
  }
  .hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:32px;align-items:center;padding-bottom:8px}
  .hero-text{order:2}
  .hero-media{order:1}
  @media (min-width:1024px){
    .hero{padding:56px 0 0}
    .hero-grid{grid-template-columns:1fr 1fr;gap:48px}
    .hero-text{order:1}
    .hero-media{order:2}
  }
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--accent-050);color:#9A5B00;
    font-size:13px;font-weight:600;line-height:1;
    padding:8px 12px;border-radius:var(--r-badge);
  }
  .hero-badge-dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
  .hero h1{
    margin-top:20px;
    font-size:clamp(28px,4.4vw,52px);
    font-weight:800;line-height:1.22;letter-spacing:-.02em;color:var(--ink);
  }
  .hero h1 .hl{color:var(--brand)}
  .hero-sub{margin-top:18px;font-size:16px;line-height:1.85;color:var(--muted);max-width:620px}
  .hero-cta{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
  .metrics{
    margin-top:32px;padding-top:24px;border-top:1px solid var(--line);
    display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
  }
  @media (min-width:768px){
    .metrics{grid-template-columns:repeat(4,1fr);gap:0}
    .metric{padding:0 20px;border-left:1px solid var(--line)}
    .metric:first-child{border-left:0;padding-left:0}
  }
  .metric-num{font-size:24px;font-weight:700;line-height:1.3;color:var(--brand);font-variant-numeric:tabular-nums}
  .metric-label{font-size:13px;line-height:1.7;color:var(--muted)}
  .hero-media{
    position:relative;border-radius:var(--r-img);overflow:hidden;
    box-shadow:var(--s2);aspect-ratio:4/3;background:var(--surface-2);
  }
  @media (min-width:1024px){.hero-media{aspect-ratio:16/10}}
  .hero-media img{width:100%;height:100%;object-fit:cover}
  .hero-media::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
    background-size:40px 40px;
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:64px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .section--white{background:var(--surface)}
  .section--soft{background:var(--surface-2)}
  .sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
  .sec-title{
    position:relative;padding-left:16px;
    font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.01em;
  }
  .sec-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--brand)}
  .sec-title--alt{padding-left:0;padding-top:18px}
  .sec-title--alt::before{left:0;top:0;bottom:auto;width:32px;height:4px}
  .sec-desc{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);max-width:820px}
  .link-dash{color:var(--brand);border-bottom:1px dashed var(--brand);font-weight:600;transition:color var(--ease),border-color var(--ease)}
  .link-dash:hover{color:var(--brand-600);border-bottom-color:var(--brand-600)}

  /* ---------- 价格速览卡 ---------- */
  .plan-grid{display:grid;grid-template-columns:1fr;gap:24px}
  @media (min-width:640px){.plan-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.plan-grid{grid-template-columns:repeat(3,1fr)}}
  .card{
    position:relative;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-card);padding:24px;box-shadow:var(--s1);
    transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  }
  .card:hover{box-shadow:var(--s2);transform:translateY(-2px)}
  .price-card{display:flex;flex-direction:column;gap:16px}
  .price-card.is-featured{
    border-color:var(--brand);box-shadow:var(--s2);
    background:linear-gradient(180deg,var(--brand-050) 0%,#fff 42%);
  }
  .price-flag{
    position:absolute;top:-12px;left:24px;
    background:var(--brand);color:#fff;font-size:12px;font-weight:600;
    line-height:1;padding:6px 10px;border-radius:var(--r-badge);
  }
  .price-name{font-size:18px;font-weight:700}
  .price-name small{display:block;margin-top:6px;font-size:13px;font-weight:400;color:var(--muted)}
  .price-value{font-size:32px;font-weight:800;line-height:1.2;font-variant-numeric:tabular-nums;color:var(--ink)}
  .price-value span{margin-left:4px;font-size:14px;font-weight:500;color:var(--muted)}
  .price-note{font-size:13px;color:var(--muted)}
  .price-list{display:grid;gap:10px;padding-top:16px;border-top:1px dashed var(--line)}
  .price-list li{position:relative;padding-left:16px;font-size:14px;line-height:1.75;color:var(--ink)}
  .price-list li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--brand)}
  .price-card .btn{margin-top:auto}

  /* ---------- 对照表 ---------- */
  .plan-table-wrap{
    position:relative;background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--s1);overflow:hidden;
  }
  .plan-table{width:100%;font-size:15px}
  .plan-table thead th{
    position:sticky;top:68px;z-index:3;
    background:var(--surface-2);color:var(--ink);
    padding:16px 18px;text-align:center;font-size:15px;font-weight:700;
    border-bottom:1px solid var(--line);vertical-align:top;
  }
  .plan-table thead th:first-child{text-align:left;font-weight:600;color:var(--muted)}
  .plan-table thead th.is-featured{background:var(--brand-050);color:var(--brand);box-shadow:inset 0 3px 0 var(--brand)}
  .th-price{
    display:block;margin:6px 0 12px;
    font-size:13px;font-weight:600;color:var(--muted);
    font-variant-numeric:tabular-nums;
  }
  .plan-table tbody th,.plan-table tbody td{
    padding:14px 18px;border-bottom:1px solid var(--line);
    text-align:center;vertical-align:middle;font-size:14.5px;
  }
  .plan-table tbody th{text-align:left;font-weight:600;color:var(--ink);background:#fff}
  .plan-table tbody tr:nth-child(even) th,
  .plan-table tbody tr:nth-child(even) td{background:var(--surface-2)}
  .plan-table tbody tr td.is-featured{background:#EAF3F0}
  .plan-table tbody tr:last-child th,
  .plan-table tbody tr:last-child td{border-bottom:0}
  .cell-price{color:var(--urgent);font-weight:700;font-variant-numeric:tabular-nums}
  .table-note{margin-top:16px;font-size:13px;line-height:1.8;color:var(--muted)}

  .plan-cards{display:none;gap:16px}
  @media (max-width:1023px){
    .plan-table-wrap{display:none}
    .plan-cards{display:grid}
  }
  .plan-row-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:20px;box-shadow:var(--s1);
  }
  .plan-row-card h3{font-size:16px;font-weight:600;margin-bottom:12px}
  .plan-row-item{
    display:flex;align-items:flex-start;justify-content:space-between;gap:14px;
    padding:9px 0;border-top:1px dashed var(--line);font-size:14px;
  }
  .plan-row-item:first-of-type{border-top:0}
  .plan-row-item span:first-child{color:var(--muted);flex:0 0 auto}
  .plan-row-item span:last-child{font-weight:600;text-align:right}

  /* ---------- 加购项 ---------- */
  .addon-list{display:grid;gap:14px}
  .addon{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:18px 22px;box-shadow:var(--s1);
    transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  }
  .addon:hover{box-shadow:var(--s2);transform:translateY(-2px);border-color:#C9DCD6}
  .addon-main{flex:1 1 260px}
  .addon-main h3{font-size:17px;font-weight:600}
  .addon-main p{margin-top:6px;font-size:14px;line-height:1.75;color:var(--muted)}
  .addon-price{
    font-size:20px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--brand);
    white-space:nowrap;
  }
  .addon-price span{font-size:13px;font-weight:500;color:var(--muted);margin-left:2px}

  /* ---------- 计费说明（图文） ---------- */
  .split{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
  @media (min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:48px}}
  .split-media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--s2);aspect-ratio:3/2;background:var(--surface-2)}
  .split-media img{width:100%;height:100%;object-fit:cover}
  .rule-list{display:grid;gap:18px}
  .rule-item{position:relative;padding-left:20px}
  .rule-item::before{content:"";position:absolute;left:0;top:.72em;width:10px;height:3px;border-radius:2px;background:var(--accent)}
  .rule-item h3{font-size:16px;font-weight:600}
  .rule-item p{margin-top:4px;font-size:14px;line-height:1.8;color:var(--muted)}
  .disclaimer{margin-top:24px;font-size:13px;line-height:1.8;color:var(--muted)}

  /* ---------- FAQ ---------- */
  .faq-list{display:grid;gap:14px;max-width:900px}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);overflow:hidden;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .faq-item.is-open{border-color:var(--brand);box-shadow:var(--s2)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
    transition:color var(--ease);
  }
  .faq-q:hover{color:var(--brand)}
  .faq-icon{flex:none;width:20px;height:20px;color:var(--brand);transition:transform var(--ease)}
  .faq-item.is-open .faq-icon{transform:rotate(180deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease-out}
  .faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--muted)}

  /* ---------- CTA 条 ---------- */
  .cta-band{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
    background:var(--brand-050);border:1px solid #CFE0DA;border-radius:var(--r-card);
    padding:28px 30px;
  }
  .cta-band h2{font-size:clamp(19px,2.4vw,24px);font-weight:700;line-height:1.4}
  .cta-band p{margin-top:8px;font-size:14px;line-height:1.8;color:var(--muted);max-width:640px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--brand);color:#DDE9E5;padding:56px 0 24px;margin-top:0}
  .site-footer .footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:640px){.site-footer .footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.site-footer .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
  .site-footer .brand{color:#fff}
  .site-footer .brand-mark{color:#fff}
  .site-footer .brand-name{color:#fff}
  .footer-desc{margin-top:14px;font-size:13px;line-height:1.8;color:#AFC7C1;max-width:330px}
  .site-footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
  .site-footer ul li{margin-bottom:8px}
  .site-footer ul a{font-size:13px;line-height:1.7;color:#CFE0DA;transition:color var(--ease)}
  .site-footer ul a:hover{color:var(--accent)}
  .footer-col p{font-size:13px;line-height:1.8;color:#CFE0DA;margin-bottom:6px}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
    font-size:13px;color:#AFC7C1;
  }

  /* ---------- 响应式细节 ---------- */
  @media (max-width:1023px){
    .main-nav{display:none}
    .cmd-search:not(.cmd-search--drawer){display:none}
    .ghost-btn{display:none}
    .header-tools .btn-primary{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:60px;justify-content:space-between;gap:12px}
  }
  @media (max-width:639px){
    html body{line-height:1.85}
    .hero-sub{font-size:15.5px}
    .section{padding:56px 0}
    .cta-band{padding:22px}
    .addon{padding:16px}
    .plan-table thead th{font-size:14px}
  }
  @media (max-width:520px){
    .brand-name{font-size:17px}
    .metrics{grid-template-columns:repeat(2,1fr);gap:16px}
    .hero h1{font-size:clamp(26px,7vw,34px)}
  }
  @media (prefers-reduced-motion: reduce){
    *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  }

/* roulang page: category4 */
:root{
    --brand:#0E4F45;
    --brand-600:#0A3A32;
    --brand-050:#E9F2EF;
    --accent:#FF9F1C;
    --accent-050:#FFF4E3;
    --urgent:#E4572E;
    --bg:#F6F5F1;
    --surface:#FFFFFF;
    --surface-2:#F0F4F1;
    --ink:#14201D;
    --muted:#5B6B66;
    --line:#DCE5E1;
    --ok:#1F9D6B;
    --info:#2C7BE5;
    --r-btn:12px;
    --r-card:18px;
    --r-input:10px;
    --r-badge:8px;
    --r-img:16px;
    --r-num:14px;
    --s1:0 1px 2px rgba(20,32,29,.05);
    --s2:0 8px 24px -12px rgba(20,32,29,.16);
    --s3:0 20px 48px -20px rgba(20,32,29,.24);
    --ease:200ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.9;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,figure,blockquote{margin:0;}
  ul,ol{list-style:none;margin:0;padding:0;}
  img{max-width:100%;height:auto;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input,textarea,select{font:inherit;color:inherit;}
  :focus-visible{outline:3px solid rgba(14,79,69,.28);outline-offset:2px;}
  .num{font-variant-numeric:tabular-nums;}

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

  /* ============ 头部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.88);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow var(--ease);
  }
  .site-header.is-scrolled{box-shadow:var(--s1);}
  .header-inner{display:flex;align-items:center;gap:20px;height:68px;}
  @media (max-width:1023px){ .header-inner{height:60px;gap:12px;} }

  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{width:32px;height:32px;color:var(--brand);flex-shrink:0;}
  .brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--brand);}

  .main-nav{margin-left:14px;}
  .main-nav ul{display:flex;align-items:center;gap:2px;}
  .main-nav a{
    position:relative;display:inline-block;
    padding:8px 12px;border-radius:8px;
    font-size:14.5px;font-weight:600;color:var(--muted);
    transition:color var(--ease),background-color var(--ease);
  }
  .main-nav a:hover{color:var(--brand);background:var(--brand-050);}
  .main-nav a.active{color:var(--brand);}
  .main-nav a.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:-2px;
    height:2px;border-radius:2px;background:var(--brand);
  }
  @media (max-width:1023px){ .main-nav{display:none;} }

  .header-tools{margin-left:auto;display:flex;align-items:center;gap:14px;}
  @media (max-width:1023px){ .header-tools{display:none;} }

  .cmd-search{position:relative;display:none;width:200px;}
  @media (min-width:1024px){ .cmd-search{display:block;} }
  @media (min-width:1200px){ .cmd-search{width:300px;} }
  .cmd-search .cmd-input{
    display:flex;align-items:center;gap:8px;
    height:40px;padding:0 34px 0 12px;
    background:var(--surface-2);border:1px solid transparent;border-radius:var(--r-input);
    transition:border-color var(--ease),background-color var(--ease);
  }
  .cmd-search .cmd-input svg{width:15px;height:15px;color:var(--muted);flex-shrink:0;}
  .cmd-search .cmd-input input{
    width:100%;border:0;background:transparent;font-size:14px;line-height:1;outline:none;
  }
  .cmd-search .cmd-input input::placeholder{color:#8C9A95;}
  .cmd-kbd{
    position:absolute;right:10px;top:50%;transform:translateY(-50%);
    font-size:11px;color:var(--muted);background:#fff;border:1px solid var(--line);
    border-radius:6px;padding:1px 6px;line-height:1.6;
  }
  .cmd-search:focus-within .cmd-input{border-color:var(--brand);background:var(--surface);}
  .cmd-panel{
    position:absolute;left:0;right:0;top:calc(100% + 8px);
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s2);padding:12px;
    opacity:0;visibility:hidden;transform:translateY(-4px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .cmd-search:focus-within .cmd-panel{opacity:1;visibility:visible;transform:translateY(0);}
  .cmd-panel .cmd-title{font-size:12px;color:var(--muted);padding:2px 8px 6px;letter-spacing:.04em;}
  .cmd-panel a{
    display:block;padding:8px;border-radius:8px;font-size:14px;font-weight:600;color:var(--ink);
    transition:background-color var(--ease),color var(--ease);
  }
  .cmd-panel a:hover{background:var(--brand-050);color:var(--brand);}
  .cmd-panel .cmd-hint{
    font-size:12px;color:var(--muted);padding:8px;margin-top:6px;border-top:1px dashed var(--line);
  }

  .link-quiet{
    font-size:14px;font-weight:600;color:var(--brand);
    border-bottom:1px dashed transparent;transition:border-color var(--ease);
  }
  .link-quiet:hover{border-bottom-color:var(--brand);}

  .nav-toggle{
    display:none;margin-left:auto;width:40px;height:40px;
    align-items:center;justify-content:center;border-radius:10px;
    border:1px solid var(--line);background:var(--surface);color:var(--brand);
  }
  @media (max-width:1023px){ .nav-toggle{display:inline-flex;} }

  .drawer-mask{
    position:fixed;inset:0;background:rgba(20,32,29,.42);z-index:70;
    opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
  }
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:80;
    background:var(--surface);box-shadow:var(--s3);
    display:flex;flex-direction:column;
    transform:translateX(100%);transition:transform var(--ease);
    padding:18px 20px 22px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
  .drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--brand);}
  .drawer-search{
    display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
    background:var(--surface-2);border-radius:var(--r-input);margin-bottom:18px;
  }
  .drawer-search input{width:100%;border:0;background:transparent;font-size:14px;outline:none;}
  .drawer nav a{
    display:block;padding:12px 10px;border-radius:10px;font-size:15px;font-weight:600;color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .drawer nav a.active{color:var(--brand);background:var(--brand-050);}
  .drawer-foot{margin-top:auto;padding-top:20px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 24px;border-radius:var(--r-btn);
    font-size:14.5px;font-weight:600;line-height:1;white-space:nowrap;
    transition:background-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:var(--s1);}
  .btn-primary:hover{background:var(--brand-600);box-shadow:var(--s2);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);box-shadow:var(--s1);}
  .btn-outline{border:1px solid var(--brand);color:var(--brand);background:transparent;}
  .btn-outline:hover{background:var(--brand-050);transform:translateY(-1px);box-shadow:var(--s2);}
  .btn-outline:active{transform:translateY(0);}
  .btn-accent{background:var(--accent);color:var(--ink);box-shadow:var(--s1);}
  .btn-accent:hover{background:#F2920F;box-shadow:var(--s2);transform:translateY(-1px);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn-lg{height:48px;padding:0 28px;}
  .btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

  /* ============ 面包屑 ============ */
  .crumb{padding:20px 0 4px;}
  .crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);}
  .crumb li{display:inline-flex;align-items:center;gap:8px;}
  .crumb li+li::before{content:"/";color:#AFBCB7;}
  .crumb a{color:var(--muted);transition:color var(--ease);}
  .crumb a:hover{color:var(--brand);}
  .crumb [aria-current="page"]{color:var(--ink);font-weight:600;}

  /* ============ Hero ============ */
  .hero{position:relative;padding:48px 0 64px;overflow:hidden;}
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(to right,rgba(14,79,69,.055) 1px,transparent 1px),
      linear-gradient(to bottom,rgba(14,79,69,.055) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 78%);
    -webkit-mask-image:radial-gradient(circle at 70% 30%,#000 0%,transparent 78%);
  }
  .hero-grid{position:relative;display:grid;gap:36px;align-items:center;}
  @media (min-width:1024px){
    .hero{padding:72px 0 92px;}
    .hero-grid{grid-template-columns:6fr 6fr;gap:56px;}
  }
  .hero-media{order:-1;position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--s2);}
  .hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
  @media (min-width:1024px){ .hero-media{order:0;} .hero-media img{aspect-ratio:16/10;} }
  .hero-media::after{
    content:"";position:absolute;inset:0;
    background-image:
      linear-gradient(to right,rgba(255,255,255,.16) 1px,transparent 1px),
      linear-gradient(to bottom,rgba(255,255,255,.16) 1px,transparent 1px);
    background-size:48px 48px;opacity:.5;
  }

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:var(--r-badge);
    font-size:12.5px;font-weight:700;letter-spacing:.02em;
    background:var(--accent-050);color:#A65F00;
  }
  .badge-brand{background:var(--brand-050);color:var(--brand);}
  .badge-plain{background:var(--surface-2);color:var(--muted);}

  h1{
    font-size:clamp(28px,4.4vw,52px);font-weight:800;line-height:1.22;letter-spacing:-.02em;
    margin:16px 0 18px;
  }
  h1 .hl{color:var(--brand);}
  .hero-sub{font-size:16.5px;line-height:1.9;color:var(--muted);max-width:34em;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 30px;}

  .metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 12px;}
  @media (min-width:640px){ .metrics{display:flex;align-items:stretch;gap:0;} }
  .metric{padding-right:20px;}
  @media (min-width:640px){
    .metric{padding:0 24px;border-left:1px solid var(--line);}
    .metric:first-child{padding-left:0;border-left:0;}
  }
  .metric-num{font-size:24px;font-weight:700;line-height:1.25;color:var(--brand);}
  .metric-label{font-size:13px;line-height:1.7;color:var(--muted);margin-top:2px;}

  /* ============ 通用板块 ============ */
  .section{padding:56px 0;}
  @media (min-width:768px){ .section{padding:96px 0;} }
  .section-head{margin-bottom:34px;}
  .section-head--split{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;}
  .section-eyebrow{
    font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--brand);
    text-transform:uppercase;margin-bottom:10px;
  }
  h2{
    font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.01em;
  }
  .title-bar{position:relative;padding-left:18px;}
  .title-bar::before{
    content:"";position:absolute;left:0;top:.28em;width:4px;height:24px;border-radius:2px;background:var(--brand);
  }
  .title-under{position:relative;padding-top:22px;}
  .title-under::before{
    content:"";position:absolute;left:0;top:0;width:32px;height:4px;border-radius:2px;background:var(--brand);
  }
  .section-desc{margin-top:12px;font-size:15.5px;line-height:1.9;color:var(--muted);max-width:60em;}

  /* ============ 速览条 ============ */
  .quick-strip{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);padding:8px;
    display:grid;gap:4px;grid-template-columns:1fr;
  }
  @media (min-width:640px){ .quick-strip{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (min-width:1024px){ .quick-strip{grid-template-columns:repeat(4,minmax(0,1fr));} }
  .quick-item{padding:20px;border-radius:14px;transition:background-color var(--ease);}
  .quick-item:hover{background:var(--surface-2);}
  .quick-item .q-k{font-size:13px;color:var(--muted);margin-bottom:6px;}
  .quick-item .q-v{font-size:17px;font-weight:700;line-height:1.5;}
  .quick-item .q-d{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.7;}

  /* ============ 场景图文 ============ */
  .scene-list{display:grid;gap:64px;}
  @media (min-width:768px){ .scene-list{gap:88px;} }
  .scene{display:grid;gap:26px;align-items:center;}
  .scene-media{order:-1;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--s2);}
  .scene-media img{width:100%;aspect-ratio:3/2;object-fit:cover;}
  @media (min-width:900px){
    .scene{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:52px;}
    .scene-body{order:1;}
    .scene-media{order:2;}
    .scene--reverse .scene-media{order:0;}
  }
  .scene-index{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:50%;
    background:var(--accent);color:#fff;font-size:16px;font-weight:800;
    font-variant-numeric:tabular-nums;margin-bottom:16px;
    box-shadow:var(--s1);
  }
  .scene-title{font-size:clamp(19px,2.2vw,24px);font-weight:700;line-height:1.45;margin-bottom:14px;}
  .scene-body p{font-size:15.5px;line-height:1.95;color:#33423E;margin-bottom:14px;}
  .scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 18px;}
  .scene-tags li{
    font-size:12.5px;font-weight:600;line-height:1.6;
    padding:5px 11px;border-radius:var(--r-badge);
    background:var(--brand-050);color:var(--brand);
  }
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14.5px;font-weight:700;color:var(--brand);
    border-bottom:1px dashed rgba(14,79,69,.5);padding-bottom:2px;
    transition:color var(--ease),border-color var(--ease),gap var(--ease);
  }
  .link-arrow:hover{color:var(--brand-600);border-bottom-color:var(--brand-600);gap:10px;}

  /* ============ 对照卡 ============ */
  .compare-grid{display:grid;gap:20px;grid-template-columns:1fr;}
  @media (min-width:768px){ .compare-grid{grid-template-columns:repeat(3,minmax(0,1fr));} }
  .card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);padding:24px;
    transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  }
  .card:hover{box-shadow:var(--s2);transform:translateY(-2px);}
  .compare-card .cc-title{
    display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;line-height:1.5;margin-bottom:6px;
  }
  .cc-dot{width:10px;height:10px;border-radius:50%;background:var(--brand);flex-shrink:0;}
  .compare-card .cc-note{font-size:13px;color:var(--muted);margin-bottom:16px;line-height:1.7;}
  .cc-row{
    display:flex;gap:14px;justify-content:space-between;align-items:baseline;
    padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;
  }
  .cc-row:last-child{border-bottom:0;}
  .cc-row dt{color:var(--muted);flex-shrink:0;}
  .cc-row dd{margin:0;text-align:right;font-weight:600;color:var(--ink);}

  /* ============ 深色观察区 ============ */
  .dark-band{
    background:var(--brand);color:#fff;position:relative;overflow:hidden;
    padding:64px 0;
  }
  @media (min-width:768px){ .dark-band{padding:88px 0;} }
  .dark-band::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(to right,rgba(255,255,255,.08) 1px,transparent 1px),
      linear-gradient(to bottom,rgba(255,255,255,.08) 1px,transparent 1px);
    background-size:72px 72px;
    mask-image:radial-gradient(circle at 20% 20%,#000 0%,transparent 80%);
    -webkit-mask-image:radial-gradient(circle at 20% 20%,#000 0%,transparent 80%);
  }
  .dark-band .section-eyebrow{color:#9FD5C6;}
  .dark-band h2{color:#fff;}
  .dark-band .title-under::before{background:var(--accent);}
  .dark-desc{color:rgba(255,255,255,.78);font-size:15.5px;line-height:1.9;margin-top:12px;max-width:52em;}
  .dark-grid{display:grid;gap:18px;grid-template-columns:1fr;margin-top:38px;}
  @media (min-width:768px){ .dark-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;} }
  .dark-cell{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.16);
    border-radius:var(--r-card);padding:24px;
    transition:background-color var(--ease),transform var(--ease);
  }
  .dark-cell:hover{background:rgba(255,255,255,.1);transform:translateY(-2px);}
  .dark-cell .dc-k{font-size:13px;color:#9FD5C6;font-weight:700;letter-spacing:.06em;margin-bottom:10px;}
  .dark-cell .dc-t{font-size:18px;font-weight:700;line-height:1.5;margin-bottom:10px;color:#fff;}
  .dark-cell .dc-d{font-size:14px;line-height:1.85;color:rgba(255,255,255,.76);}

  /* ============ FAQ ============ */
  .faq-list{display:grid;gap:14px;max-width:900px;}
  .faq-item{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);overflow:hidden;
    transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
  }
  .faq-item[open]{border-color:rgba(14,79,69,.45);box-shadow:var(--s2);}
  .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;line-height:1.6;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"";flex-shrink:0;width:10px;height:10px;
    border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
    transform:rotate(45deg);transition:transform var(--ease);
    margin-top:-4px;
  }
  .faq-item[open] summary::after{transform:rotate(-135deg);margin-top:4px;}
  .faq-body{padding:0 24px 22px;font-size:15px;line-height:1.9;color:#37453F;}
  .faq-body p+p{margin-top:10px;}

  /* ============ CTA 条 ============ */
  .cta-bar{
    background:var(--brand-050);border:1px solid rgba(14,79,69,.18);
    border-radius:var(--r-card);padding:28px;
    display:flex;flex-direction:column;gap:20px;align-items:flex-start;
  }
  @media (min-width:900px){
    .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:34px 38px;gap:32px;}
  }
  .cta-bar .cta-title{font-size:clamp(19px,2.3vw,24px);font-weight:700;line-height:1.5;}
  .cta-bar .cta-note{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.8;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--brand);color:rgba(255,255,255,.82);padding:56px 0 28px;margin-top:8px;}
  @media (min-width:768px){ .site-footer{padding:72px 0 32px;} }
  .footer-grid{display:grid;gap:34px;grid-template-columns:1fr;}
  @media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;} }
  .site-footer .brand{align-items:center;margin-bottom:16px;}
  .site-footer .brand-mark{color:#fff;}
  .site-footer .brand-name{color:#fff;}
  .footer-desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.7);max-width:26em;}
  .footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em;}
  .footer-col ul{display:grid;gap:9px;}
  .footer-col a{font-size:13px;line-height:1.7;color:rgba(255,255,255,.76);transition:color var(--ease);}
  .footer-col a:hover{color:var(--accent);}
  .footer-col p{font-size:13px;line-height:1.85;color:rgba(255,255,255,.76);margin-bottom:6px;}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
    display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;
    font-size:12.5px;color:rgba(255,255,255,.6);line-height:1.8;
  }

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }