/* roulang page: index */
:root{
  --ink:#14181A;
  --ink-2:#5A615D;
  --ink-3:#8B918D;
  --bg:#FAF8F4;
  --surface:#F1ECE4;
  --line:#E2DCD2;
  --brand:#123A32;
  --brand-2:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-2:#D98A4E;
  --dark:#0E1A17;
  --dark-ink:#C9D4CF;
  --ok:#2F7D5B;
  --warn:#C08A1E;
  --err:#B4432F;
  --rc:14px;
  --rb:10px;
  --ri:12px;
  --rm:16px;
  --sh1:0 1px 2px rgba(20,24,26,.04),0 8px 24px -12px rgba(20,24,26,.10);
  --sh2:0 2px 4px rgba(20,24,26,.06),0 18px 38px -18px rgba(20,24,26,.20);
  --ez:cubic-bezier(.22,.61,.36,1);
  --side:248px;
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',-apple-system,sans-serif;
  --mono:'IBM Plex Mono','Barlow',ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-2);text-decoration:none;transition:color .2s var(--ez)}
a:hover{color:var(--copper)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{font-family:var(--serif);margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px}
input,select,textarea{font-family:inherit}

/* ---------- Foundation 覆盖 ---------- */
.grid-container{max-width:1240px;padding-left:32px;padding-right:32px;margin:0 auto;width:100%}
.grid-x{display:flex;flex-wrap:wrap}
.grid-margin-x>.cell{margin-bottom:0}
table{border-collapse:collapse}
select{-webkit-appearance:none;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' fill='none' stroke='%235A615D' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}

/* ---------- 通用元素 ---------- */
.eyebrow{
  font-size:12px;letter-spacing:.16em;color:var(--ink-3);
  margin:0 0 14px;font-weight:500;
}
.sec-head{margin-bottom:44px;max-width:760px}
.sec-head h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.3}
.sec-head p.lead{margin-top:14px;color:var(--ink-2);font-size:15px;max-width:640px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--brand-2);position:relative;padding-bottom:3px;min-height:44px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:8px;width:100%;height:1px;background:currentColor;
  transform:scaleX(1);transform-origin:left;transition:transform .28s var(--ez);
}
.text-link:hover::after{transform:scaleX(0);transform-origin:right}
.text-link span.ar{transition:transform .24s var(--ez)}
.text-link:hover span.ar{transform:translateX(4px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:44px;padding:13px 26px;border-radius:var(--rb);
  border:1.5px solid transparent;font-size:15px;font-weight:600;line-height:1;
  transition:background .22s var(--ez),color .22s var(--ez),transform .22s var(--ez),border-color .22s var(--ez),box-shadow .22s var(--ez);
  text-align:center;
}
.btn .arw{transition:transform .22s var(--ez);flex:0 0 auto}
.btn:hover .arw{transform:translateX(3px)}
.btn-primary{background:var(--brand);color:#FAF8F4;border-color:var(--brand)}
.btn-primary:hover{background:var(--copper);border-color:var(--copper);color:#FFF;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--mist);color:var(--brand);border-color:var(--brand-2);transform:translateY(-1px)}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}

/* ---------- 左侧 App Shell ---------- */
.shell-side{
  position:fixed;top:0;left:0;bottom:0;width:var(--side);
  background:var(--dark);color:var(--dark-ink);
  display:flex;flex-direction:column;gap:26px;
  padding:28px 20px 22px;
  z-index:60;overflow-y:auto;overflow-x:hidden;
}
.shell-side::-webkit-scrollbar{width:5px}
.shell-side::-webkit-scrollbar-thumb{background:#24382F;border-radius:3px}
.brand{display:flex;align-items:center;gap:11px;color:#FAF8F4;min-height:44px}
.brand:hover{color:#FFF}
.brand-mark{flex:0 0 auto;display:flex}
.brand-text{
  font-family:var(--serif);font-weight:700;font-size:17px;letter-spacing:.01em;
  line-height:1.25;color:inherit;white-space:nowrap;
}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:10px 12px 10px 16px;border-radius:8px;
  color:var(--dark-ink);font-size:14.5px;line-height:1.35;
  transition:background .22s var(--ez),color .22s var(--ez);
}
.side-link::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:0;
  background:var(--copper);border-radius:2px;transform:translateY(-50%);
  transition:height .24s var(--ez);
}
.side-link:hover{background:rgba(220,231,225,.08);color:#F1ECE4}
.side-link:hover::before{height:20px}
.side-link.is-active{background:rgba(220,231,225,.13);color:#FAF8F4;font-weight:600}
.side-link.is-active::before{height:24px}
.side-num{
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  color:var(--copper-2);flex:0 0 auto;
}
.side-dot{
  width:5px;height:5px;border-radius:50%;background:var(--copper-2);flex:0 0 auto;
  margin-left:1px;margin-right:4px;
}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;min-height:44px;padding:12px 16px;border-radius:var(--rb);
  background:var(--copper);color:#FFF;font-size:14px;font-weight:600;
  transition:background .22s var(--ez),transform .22s var(--ez);
}
.side-cta:hover{background:var(--copper-2);color:#FFF;transform:translateY(-1px)}
.side-contact{
  border:1px solid rgba(220,231,225,.16);border-radius:var(--rc);
  padding:16px 14px;font-size:12.5px;line-height:1.7;color:#9DB0A8;
}
.side-contact strong{display:block;color:var(--dark-ink);font-size:13px;margin-bottom:6px;font-weight:600}
.side-foot{margin-top:auto;padding-top:20px;font-size:11.5px;line-height:1.8;color:#6E7F78}
.side-top{
  margin-top:14px;display:inline-flex;align-items:center;gap:7px;
  font-size:12px;color:#9DB0A8;min-height:44px;transition:color .2s var(--ez);
}
.side-top:hover{color:var(--copper-2)}

.shell-main{margin-left:var(--side);min-width:0;position:relative}

/* ---------- 移动端顶部与抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;
  background:var(--dark);color:#FAF8F4;align-items:center;justify-content:space-between;
  padding:0 14px;z-index:70;
}
.topbar-brand{display:flex;align-items:center;gap:9px;color:#FAF8F4}
.topbar-brand .brand-text{font-size:15px}
.hamburger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:8px;transition:background .2s var(--ez);
}
.hamburger:hover{background:rgba(220,231,225,.12)}
.hamburger span{display:block;width:20px;height:2px;background:#FAF8F4;position:relative;border-radius:2px}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:#FAF8F4;border-radius:2px;
  transition:transform .24s var(--ez),top .24s var(--ez);
}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

.drawer-mask{
  position:fixed;inset:0;background:rgba(14,26,23,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .28s var(--ez),visibility .28s var(--ez);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:86vw;
  background:var(--dark);color:var(--dark-ink);z-index:90;
  transform:translateX(-102%);transition:transform .3s var(--ez);
  padding:22px 18px 26px;display:flex;flex-direction:column;gap:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .side-nav{gap:4px}
.drawer-close{
  position:absolute;top:12px;right:8px;width:44px;height:44px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;color:#C9D4CF;
  transition:background .2s var(--ez);
}
.drawer-close:hover{background:rgba(220,231,225,.12)}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:96px 0 0;
  background:
    radial-gradient(900px 420px at 82% -12%,rgba(220,231,225,.85),transparent 68%),
    var(--bg);
}
.hero-grid{align-items:flex-start}
.hero-copy{padding-right:20px}
.hero-title{
  font-size:clamp(2.2rem,4.6vw,3.75rem);
  line-height:1.15;letter-spacing:-.02em;font-weight:900;
  margin:0 0 20px;
}
.hero-sub{
  font-size:clamp(15px,1.4vw,17.5px);line-height:1.8;color:var(--ink-2);
  max-width:560px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-side{display:flex;flex-direction:column;gap:20px}
.hero-tags{
  border:1px solid var(--line);border-radius:var(--rc);background:#fff;
  padding:8px 0;box-shadow:var(--sh1);
}
.hero-tags li{
  display:flex;align-items:center;gap:12px;padding:11px 18px;
  font-size:13.5px;color:var(--ink-2);border-bottom:1px solid var(--surface);
}
.hero-tags li:last-child{border-bottom:none}
.tag-k{
  font-family:var(--mono);font-size:11px;color:var(--copper);
  letter-spacing:.1em;flex:0 0 auto;
}
.hero-figure{
  border-radius:var(--ri);overflow:hidden;background:var(--surface);
  aspect-ratio:16/9;box-shadow:var(--sh1);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}

.trust-bar{
  margin-top:56px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  padding:16px 0;
}
.trust-bar span{
  font-size:13px;color:var(--ink-2);letter-spacing:.02em;padding:4px 0;
}
.trust-bar i{
  display:inline-block;width:1px;height:14px;background:var(--line);
  margin:0 22px;flex:0 0 auto;
}

/* ---------- 板块间距 ---------- */
.section{padding:clamp(64px,9vw,112px) 0}
.section-alt{background:var(--surface)}
.section-dark{background:var(--dark);color:var(--dark-ink)}
.section-dark h2,.section-dark h3{color:#FAF8F4}

/* ---------- 痛点提问 ---------- */
.q-list{border-top:1px solid var(--line)}
.q-item{border-bottom:1px solid var(--line)}
.q-item summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 8px 24px 18px;
  font-family:var(--serif);font-size:clamp(1rem,1.3vw,1.12rem);font-weight:700;
  transition:background .24s var(--ez),padding-left .24s var(--ez),color .24s var(--ez);
  min-height:44px;
}
.q-item summary::-webkit-details-marker{display:none}
.q-item summary::before{
  content:"";position:absolute;left:0;top:50%;width:2px;height:56%;
  background:var(--copper);border-radius:2px;
  transform:translateY(-50%) scaleY(0);transform-origin:center;
  transition:transform .26s var(--ez);
}
.q-item summary::after{
  content:"";flex:0 0 auto;width:9px;height:9px;
  border-right:1.6px solid var(--copper);border-bottom:1.6px solid var(--copper);
  transform:rotate(45deg) translate(-2px,-2px);
  transition:transform .26s var(--ez);margin-right:6px;
}
.q-item[open] summary::after{transform:rotate(-135deg) translate(-2px,-2px)}
.q-item summary:hover{background:rgba(220,231,225,.36);padding-left:24px}
.q-item[open] summary{background:rgba(220,231,225,.28);padding-left:24px}
.q-item summary:hover::before,.q-item[open] summary::before{transform:translateY(-50%) scaleY(1)}
.q-answer{padding:2px 48px 26px 24px;color:var(--ink-2);font-size:15px;line-height:1.85;max-width:880px}
.q-answer p+p{margin-top:10px}

/* ---------- 方案卡片 ---------- */
.plan-grid{align-items:stretch}
.plan-side{display:flex;flex-direction:column;gap:24px}
.plan-card{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--rc);padding:30px;box-shadow:var(--sh1);overflow:hidden;
  transition:transform .26s var(--ez),box-shadow .26s var(--ez);
}
.plan-card::before{
  content:"";position:absolute;top:0;left:50%;right:50%;height:2px;
  background:var(--copper);transition:left .32s var(--ez),right .32s var(--ez);
}
.plan-card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.plan-card:hover::before{left:0;right:0}
.plan-card-main{height:100%;display:flex;flex-direction:column}
.plan-media{
  border-radius:var(--ri);overflow:hidden;aspect-ratio:16/9;
  background:var(--surface);margin-bottom:24px;
}
.plan-media img{width:100%;height:100%;object-fit:cover}
.plan-index{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--copper);
  display:block;margin-bottom:10px;
}
.plan-card h3{font-size:1.25rem;line-height:1.4;margin-bottom:12px}
.plan-card p{color:var(--ink-2);font-size:14.5px;line-height:1.8}
.plan-points{margin:18px 0 22px;display:flex;flex-direction:column;gap:10px}
.plan-points li{
  position:relative;padding-left:18px;font-size:14px;color:var(--ink-2);line-height:1.7;
}
.plan-points li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;
  background:var(--copper-2);border-radius:1px;
}
.plan-card-main .plan-points{margin-top:auto}
.plan-foot{margin-top:40px;display:flex;justify-content:flex-start}

/* ---------- 数据区块 ---------- */
.section-stats{background:var(--dark);color:var(--dark-ink)}
.section-stats .sec-head h2{color:#FAF8F4}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid rgba(220,231,225,.14);
  border-bottom:1px solid rgba(220,231,225,.14);
}
.stat{
  padding:38px 26px;border-right:1px solid rgba(220,231,225,.14);
}
.stat:last-child{border-right:none}
.stat-value{display:flex;align-items:baseline;gap:8px}
.stat-value .num{
  font-family:var(--mono);font-size:clamp(2.6rem,4.4vw,4rem);line-height:1;
  color:var(--copper-2);font-weight:600;letter-spacing:-.02em;
}
.stat-value .unit{font-family:var(--mono);font-size:15px;color:#8FA69C}
.stat-desc{margin-top:14px;font-size:13.5px;line-height:1.7;color:#9DB0A8}
.stats-note{
  margin-top:26px;font-size:12.5px;color:#6E7F78;line-height:1.8;max-width:820px;
}

/* ---------- 表单 ---------- */
.form-grid{align-items:flex-start}
.form-intro h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.32;margin-bottom:16px}
.form-intro p{color:var(--ink-2);font-size:15px;line-height:1.85;max-width:440px}
.tick-list{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.tick-list li{
  position:relative;padding-left:26px;font-size:14px;color:var(--ink-2);line-height:1.7;
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:6px;width:14px;height:8px;
  border-left:2px solid var(--brand-2);border-bottom:2px solid var(--brand-2);
  transform:rotate(-45deg);
}
.cform{
  background:#fff;border:1px solid var(--line);border-radius:var(--rc);
  padding:30px;box-shadow:var(--sh1);
}
.field{margin-bottom:18px;display:block}
.field>label{
  display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;letter-spacing:.02em;
}
.field input[type="text"],
.field input[type="tel"],
.field input[type="email"],
.field select,
.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  background:#FFFDFA;font-size:15px;color:var(--ink);line-height:1.6;
  transition:border-color .2s var(--ez),box-shadow .2s var(--ez),background .2s var(--ez);
  margin:0;height:auto;
}
.field textarea{min-height:118px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#A9AFAB}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--copper);background:#fff;
  box-shadow:0 0 0 2px rgba(184,90,43,.18);
}
.check-row{display:flex;align-items:flex-start;gap:10px;margin:6px 0 20px}
.check-row input[type="checkbox"]{
  width:18px;height:18px;margin:3px 0 0;accent-color:var(--brand);flex:0 0 auto;
}
.check-row label{font-size:13px;color:var(--ink-2);line-height:1.7}
.check-row a{text-decoration:underline;text-underline-offset:2px}
.cform .btn{width:100%}
.form-note{margin-top:14px;font-size:12.5px;color:var(--ink-3);line-height:1.7}

/* ---------- 隐私条 ---------- */
.privacy-bar{
  margin-top:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:14px 16px;
  display:flex;align-items:flex-start;gap:10px;
}
.privacy-bar svg{flex:0 0 auto;margin-top:2px}
.privacy-bar p{font-size:13px;color:var(--ink-2);line-height:1.7}
.privacy-toggle{
  font-size:13px;color:var(--brand-2);text-decoration:underline;
  text-underline-offset:2px;min-height:0;padding:0 2px;
}
.privacy-toggle:hover{color:var(--copper)}
.privacy-detail{
  display:none;margin-top:10px;font-size:12.5px;color:var(--ink-3);line-height:1.8;
  border-top:1px dashed var(--line);padding-top:10px;
}
.privacy-detail.is-open{display:block}

/* ---------- 最新信息 ---------- */
.news-main{display:flex;flex-direction:column;gap:24px}
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--rc);
  overflow:hidden;box-shadow:var(--sh1);
  transition:transform .26s var(--ez),box-shadow .26s var(--ez);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.post-card-wide{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr)}
.post-media{display:block;background:var(--surface);aspect-ratio:16/9;overflow:hidden}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ez)}
.post-card:hover .post-media img{transform:scale(1.035)}
.post-body{padding:22px 24px;display:flex;flex-direction:column;gap:10px;min-width:0}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:4px 12px;border-radius:999px;background:var(--mist);color:var(--brand);
  font-size:12px;letter-spacing:.04em;line-height:1.6;
}
.post-title{
  font-family:var(--serif);font-size:1.05rem;line-height:1.5;font-weight:700;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover .post-title{color:var(--brand-2)}
.post-excerpt{
  font-size:14px;color:var(--ink-2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  display:flex;align-items:center;gap:14px;font-size:12.5px;color:var(--ink-3);
  margin-top:auto;font-family:var(--mono);letter-spacing:.02em;
}
.post-meta .more{color:var(--brand-2);font-family:var(--sans);font-weight:600}

.post-compact{
  background:#fff;border:1px solid var(--line);border-radius:var(--rc);
  padding:6px 0;box-shadow:var(--sh1);height:100%;
}
.post-compact li{border-bottom:1px solid var(--surface)}
.post-compact li:last-child{border-bottom:none}
.post-compact a{
  display:flex;flex-direction:column;gap:6px;padding:16px 22px;min-height:44px;
  transition:background .22s var(--ez);
}
.post-compact a:hover{background:rgba(220,231,225,.3)}
.pc-top{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--ink-3);font-family:var(--mono)}
.pc-cat{
  display:inline-block;padding:2px 10px;border-radius:999px;background:var(--surface);
  color:var(--brand-2);font-family:var(--sans);font-size:11.5px;letter-spacing:.02em;
}
.pc-title{
  font-size:14.5px;line-height:1.6;color:var(--ink);font-weight:500;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-compact a:hover .pc-title{color:var(--brand-2)}

.empty-state{
  border:1px dashed var(--line);border-radius:var(--rc);background:#fff;
  padding:60px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{opacity:.7}
.empty-state p{font-size:14.5px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:920px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 8px 22px 18px;text-align:left;background:none;
  font-family:var(--serif);font-size:clamp(1rem,1.25vw,1.1rem);font-weight:700;color:var(--ink);
  position:relative;min-height:44px;
  transition:background .24s var(--ez),padding-left .24s var(--ez);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:50%;width:2px;height:56%;
  background:var(--copper);border-radius:2px;
  transform:translateY(-50%) scaleY(0);transform-origin:center;
  transition:transform .26s var(--ez);
}
.faq-q:hover{background:rgba(220,231,225,.36);padding-left:24px}
.faq-item.is-open .faq-q{background:rgba(220,231,225,.28);padding-left:24px}
.faq-q:hover::before,.faq-item.is-open .faq-q::before{transform:translateY(-50%) scaleY(1)}
.faq-arrow{
  flex:0 0 auto;width:16px;height:16px;position:relative;margin-right:6px;
}
.faq-arrow::before,.faq-arrow::after{
  content:"";position:absolute;top:7px;width:10px;height:1.6px;background:var(--copper);border-radius:2px;
  transition:transform .26s var(--ez);
}
.faq-arrow::before{left:0;transform:rotate(45deg)}
.faq-arrow::after{right:0;transform:rotate(-45deg)}
.faq-item.is-open .faq-arrow::before{transform:rotate(-45deg)}
.faq-item.is-open .faq-arrow::after{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .34s var(--ez);
}
.faq-a-inner{padding:2px 60px 26px 24px;font-size:15px;color:var(--ink-2);line-height:1.85;max-width:880px}
.faq-a-inner p+p{margin-top:10px}

/* ---------- CTA 收尾 ---------- */
.cta-band{
  background:var(--brand);color:#EDF3F0;padding:clamp(56px,7vw,84px) 0;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;background:rgba(220,231,225,.06);
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;position:relative;z-index:1}
.cta-inner h2{color:#FAF8F4;font-size:clamp(1.4rem,2.2vw,1.9rem);line-height:1.35;margin-bottom:10px}
.cta-inner p{font-size:15px;color:#C9D4CF;max-width:620px;line-height:1.8}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-primary{background:var(--copper);border-color:var(--copper);color:#FFF}
.cta-band .btn-primary:hover{background:var(--copper-2);border-color:var(--copper-2)}
.cta-band .btn-ghost{border-color:rgba(220,231,225,.5);color:#EDF3F0}
.cta-band .btn-ghost:hover{background:rgba(220,231,225,.14);color:#FFF;border-color:rgba(220,231,225,.8)}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--dark);color:var(--dark-ink);
  border-top:2px solid var(--copper);
  padding:64px 0 28px;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.foot-brand .brand-text{color:#FAF8F4;font-size:16px}
.foot-desc{font-size:13.5px;line-height:1.9;color:#9DB0A8;max-width:340px}
.foot-col h4{
  font-family:var(--sans);font-size:13px;letter-spacing:.12em;color:#8FA69C;
  font-weight:600;margin-bottom:16px;
}
.foot-col li{margin-bottom:10px}
.foot-col a{
  font-size:14px;color:var(--dark-ink);transition:color .2s var(--ez);
  display:inline-block;min-height:24px;
}
.foot-col a:hover{color:var(--copper-2)}
.foot-info{font-size:13px;line-height:1.9;color:#9DB0A8}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(220,231,225,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:#6E7F78;
}

/* ---------- 弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(14,26,23,.58);z-index:100;
  display:flex;align-items:center;justify-content:center;padding:20px;
  opacity:0;visibility:hidden;transition:opacity .26s var(--ez),visibility .26s var(--ez);
}
.modal-mask.is-open{opacity:1;visibility:visible}
.modal-box{
  width:100%;max-width:560px;background:#FFFDFA;border-radius:var(--rm);
  padding:32px;position:relative;box-shadow:var(--sh2);
  transform:translateY(12px);opacity:0;
  transition:transform .3s var(--ez),opacity .3s var(--ez);
  max-height:90vh;overflow-y:auto;
}
.modal-mask.is-open .modal-box{transform:translateY(0);opacity:1}
.modal-close{
  position:absolute;top:8px;right:8px;width:44px;height:44px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;color:var(--ink-2);
  transition:background .2s var(--ez),color .2s var(--ez);
}
.modal-close:hover{background:var(--surface);color:var(--copper)}
.modal-box h3{font-size:1.35rem;margin-bottom:12px;line-height:1.4}
.modal-box>p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-bottom:22px}
.modal-list{display:flex;flex-direction:column;gap:14px;margin-bottom:24px}
.modal-list li{
  position:relative;padding-left:26px;font-size:14px;color:var(--ink-2);line-height:1.75;
  counter-increment:mstep;
}
.modal-list li::before{
  content:counter(mstep,decimal-leading-zero);
  position:absolute;left:0;top:.15em;font-family:var(--mono);font-size:12px;color:var(--copper);
}
.modal-actions{display:flex;gap:12px;flex-wrap:wrap}
.modal-actions .btn{flex:1 1 180px}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:32px;transform:translate(-50%,16px);
  background:var(--dark);color:#EDF3F0;font-size:14px;padding:13px 22px;
  border-radius:999px;box-shadow:var(--sh2);z-index:120;opacity:0;visibility:hidden;
  transition:opacity .28s var(--ez),transform .28s var(--ez),visibility .28s var(--ez);
  max-width:90vw;text-align:center;
}
.toast.is-open{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ez),transform .5s var(--ez)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .post-card-wide{grid-template-columns:minmax(0,260px) minmax(0,1fr)}
}
@media (max-width:1023px){
  :root{--side:76px}
  .shell-side{padding:22px 12px 18px;align-items:center;gap:22px}
  .brand-text{display:none}
  .side-link{justify-content:center;padding:10px;gap:0}
  .side-link .side-label{display:none}
  .side-num{font-size:12px}
  .side-dot{margin:0}
  .side-cta{width:44px;height:44px;padding:0;font-size:0}
  .side-cta svg{transform:scale(1.05)}
  .side-contact{display:none}
  .side-foot{text-align:center;font-size:10px;line-height:1.6}
  .side-link{position:relative}
  .side-link:hover::after,
  .side-link:focus-visible::after{
    content:attr(data-label);position:absolute;left:calc(100% + 10px);top:50%;
    transform:translateY(-50%);background:var(--brand);color:#FAF8F4;
    font-size:12px;padding:6px 12px;border-radius:6px;white-space:nowrap;z-index:99;
    box-shadow:var(--sh1);
  }
  .hero{padding-top:72px}
  .hero-copy{padding-right:0;margin-bottom:36px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2n){border-right:none}
  .stat:nth-child(-n+2){border-bottom:1px solid rgba(220,231,225,.14)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .post-card-wide{grid-template-columns:1fr}
  .post-media{aspect-ratio:16/9}
}
@media (max-width:767px){
  .shell-side{display:none}
  .shell-main{margin-left:0;padding-top:60px}
  .topbar{display:flex}
  .grid-container{padding-left:20px;padding-right:20px}
  .hero{padding-top:48px}
  .hero-title{font-size:clamp(1.85rem,7vw,2.4rem)}
  .hero-sub{font-size:15px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .trust-bar{gap:0;padding:14px 0;margin-top:40px}
  .trust-bar i{margin:0 12px}
  .trust-bar span{font-size:12.5px}
  .sec-head{margin-bottom:32px}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:8px}
  .q-answer{padding:2px 16px 22px 18px;font-size:14.5px}
  .faq-a-inner{padding:2px 20px 22px 18px;font-size:14.5px}
  .plan-card{padding:24px}
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid rgba(220,231,225,.14);padding:26px 18px}
  .stat:last-child{border-bottom:none}
  .cform{padding:22px}
  .empty-state{padding:44px 20px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:8px}
  .modal-box{padding:26px 22px}
  .modal-actions .btn{flex:1 1 100%}
}
@media (max-width:520px){
  .post-compact a{padding:14px 16px}
  .post-body{padding:18px}
  .hero-tags li{padding:10px 14px;font-size:13px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#0E1A17;
  --ink-800:#123A32;
  --ink-600:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-l:#D98A4E;
  --bg:#FAF8F4;
  --surface:#F1ECE4;
  --line:#E2DCD2;
  --text:#14181A;
  --text-2:#5A615D;
  --text-3:#8B918D;
  --ok:#2F7D5B;
  --warn:#C08A1E;
  --err:#B4432F;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:16px;
  --sh-1:0 1px 2px rgba(20,24,26,.04);
  --sh-2:0 8px 24px -12px rgba(20,24,26,.10);
  --sh-h:0 2px 4px rgba(20,24,26,.05), 0 14px 30px -14px rgba(20,24,26,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --rail:248px;
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'IBM Plex Mono','Barlow',monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.004em;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink-600);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--copper)}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--serif);color:var(--text);margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1rem}
ul,ol{margin:0 0 1rem;padding-left:1.2em}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px}
.grid-container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- App shell ---------- */
.app-shell{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);
  background:var(--ink-900);z-index:60;
}
.side-inner{height:100%;display:flex;flex-direction:column;padding:28px 22px 22px;overflow-y:auto}
.side-brand{display:flex;align-items:center;gap:10px;color:#F4F1EA;min-height:44px}
.side-brand .brand-mark{display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.side-brand .brand-text{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.side-nav{margin-top:34px;display:flex;flex-direction:column;gap:4px}
.side-link{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:10px 12px;border-radius:8px;
  color:#B9C6C1;font-size:14.5px;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.side-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:0;height:22px;background:var(--copper);border-radius:0 2px 2px 0;
  transition:width .22s var(--ease);
}
.side-link:hover{background:rgba(220,231,225,.07);color:#F1F5F2}
.side-link:hover::before{width:2px}
.side-link.is-active{background:rgba(220,231,225,.12);color:#FFFFFF}
.side-link.is-active::before{width:3px}
.side-num{font-family:var(--mono);font-size:11.5px;color:var(--copper-l);letter-spacing:.08em;flex:0 0 18px}
.side-dot{width:6px;height:6px;border-radius:2px;background:var(--copper-l);margin-left:6px;margin-right:6px;flex:0 0 auto}
.side-label{white-space:nowrap}
.side-cta{
  margin-top:26px;display:flex;align-items:center;justify-content:center;
  min-height:46px;padding:12px 16px;border-radius:var(--r-btn);
  background:var(--copper);color:#FFF7F1;font-size:14.5px;font-weight:600;
  text-align:center;transition:background .22s var(--ease),transform .22s var(--ease);
}
.side-cta:hover{background:var(--copper-l);color:#2A1206;transform:translateY(-1px)}
.side-contact{
  margin-top:18px;padding:14px;border-radius:12px;
  background:rgba(220,231,225,.06);border:1px solid rgba(220,231,225,.12);
}
.side-contact-title{display:block;font-size:12px;letter-spacing:.16em;color:var(--copper-l);margin-bottom:6px}
.side-contact p{margin:0;font-size:12.5px;line-height:1.7;color:#9FB0AA}
.side-foot{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:10px}
.side-foot span{font-size:11.5px;color:#7E8D88;line-height:1.6}
.to-top{
  min-height:44px;border:1px solid rgba(220,231,225,.2);background:transparent;
  color:#C9D4CF;border-radius:var(--r-btn);font-size:13px;cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.to-top:hover{border-color:var(--copper-l);color:#FFF}

/* drawer + topbar */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:var(--ink-900);align-items:center;justify-content:space-between;
  padding:0 16px;border-bottom:1px solid rgba(220,231,225,.14);
}
.mobile-brand{color:#F4F1EA;font-family:var(--serif);font-size:16px;font-weight:700}
.burger{
  width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;
  align-items:center;gap:5px;background:transparent;border:1px solid rgba(220,231,225,.24);
  border-radius:10px;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:#DCE7E1;border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;background:var(--ink-900);z-index:90;
  transform:translateX(-100%);transition:transform .3s var(--ease);overflow-y:auto;
}
.drawer.is-open{transform:none}
.drawer .side-inner{padding-top:24px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,26,23,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
body.is-locked{overflow:hidden}

/* ---------- main ---------- */
.app-main{margin-left:var(--rail);min-height:100vh;padding-bottom:0}
.page-wrap{padding-top:34px}

.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:26px;
}
.crumb a{color:var(--text-2);border-bottom:1px solid transparent}
.crumb a:hover{color:var(--copper);border-bottom-color:var(--copper)}
.crumb .sep{color:#C6C1B8}
.crumb .current{color:var(--text);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.post-head{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:34px}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--copper);
  text-transform:none;margin-bottom:14px;
}
.kicker::before{content:"";width:18px;height:1px;background:var(--copper)}
.post-head h1{
  font-size:clamp(1.9rem,3.4vw,2.9rem);line-height:1.22;letter-spacing:-.02em;
  max-width:940px;
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:20px;font-size:13.5px;color:var(--text-2);
}
.post-meta .badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--mist);color:var(--ink-800);font-size:12.5px;font-weight:600;
}
.post-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:#C6C1B8}
.post-meta .mono{font-family:var(--mono);font-size:12.5px;color:var(--text-3);letter-spacing:.04em}

.post-layout{display:grid;grid-template-columns:minmax(0,720px) 1fr;gap:56px;align-items:start}
.post-body{font-size:17px;line-height:1.9;min-width:0;word-wrap:break-word;overflow-wrap:break-word}
.post-body > *:first-child{margin-top:0}
.post-body h2{
  position:relative;font-size:clamp(1.35rem,2.1vw,1.7rem);line-height:1.35;
  margin:40px 0 16px;padding-left:14px;
}
.post-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;background:var(--copper);border-radius:2px}
.post-body h3{font-size:1.25rem;line-height:1.4;margin:28px 0 12px}
.post-body h4{font-size:1.05rem;margin:22px 0 10px}
.post-body p{margin:0 0 18px}
.post-body ul,.post-body ol{margin:0 0 18px;padding-left:1.5em}
.post-body li{margin:0 0 8px}
.post-body blockquote{
  margin:0 0 22px;padding:16px 22px;border-left:3px solid var(--copper);
  background:var(--surface);border-radius:0 12px 12px 0;color:var(--text-2);font-size:16.5px;
}
.post-body a{color:var(--ink-600);border-bottom:1px solid currentColor}
.post-body a:hover{color:var(--copper)}
.post-body img{border-radius:var(--r-img);margin:24px 0;width:100%}
.post-body figure{margin:24px 0}
.post-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.post-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px}
.post-body th,.post-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.post-body th{background:var(--surface);font-weight:600}
.post-body code{font-family:var(--mono);font-size:.88em;background:var(--surface);padding:2px 6px;border-radius:6px}
.post-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

.post-rail{position:sticky;top:32px;display:flex;flex-direction:column;gap:18px;max-width:300px}
.rail-card{
  background:#FFF;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.rail-card h4{font-size:15px;margin-bottom:12px;font-family:var(--sans);font-weight:700}
.rail-list{list-style:none;margin:0;padding:0}
.rail-list li{margin-bottom:10px}
.rail-list a{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.6;min-height:32px}
.rail-list a:hover{color:var(--copper)}
.rail-list .mono{font-family:var(--mono);font-size:11.5px;color:var(--copper);padding-top:2px}
.rail-note{font-size:13px;color:var(--text-3);line-height:1.7;margin:0}

.empty-state{
  text-align:center;padding:56px 24px;background:#FFF;border:1px solid var(--line);
  border-radius:var(--r-card);
}
.empty-state svg{margin:0 auto 16px;display:block}
.empty-state p{color:var(--text-2);margin-bottom:18px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:13px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1.5px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--ink-800);color:#F7F4EE}
.btn-primary:hover{background:var(--copper);color:#FFF8F3;transform:translateY(-1px)}
.btn-primary .arrow{transition:transform .22s var(--ease)}
.btn-primary:hover .arrow{transform:translateX(3px)}
.btn-ghost{background:transparent;border-color:var(--ink-800);color:var(--ink-800)}
.btn-ghost:hover{background:var(--mist);color:var(--ink-800)}

.section{padding:64px 0}
.section-head{margin-bottom:32px}
.section-head h2{font-size:clamp(1.4rem,2.3vw,1.9rem);line-height:1.3}
.section-head p{color:var(--text-2);margin:10px 0 0;max-width:720px;font-size:15.5px}

/* related */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.r-card{
  background:#FFF;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.r-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:#D6CFC3}
.r-thumb{aspect-ratio:16/9;background:var(--surface);overflow:hidden}
.r-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.r-card:hover .r-thumb img{transform:scale(1.04)}
.r-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.r-badge{align-self:flex-start;font-size:12px;padding:4px 10px;border-radius:999px;background:var(--mist);color:var(--ink-800)}
.r-body h3{font-size:16.5px;line-height:1.45;font-family:var(--sans);font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.r-body p{font-size:14px;color:var(--text-2);margin:0;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.r-date{font-family:var(--mono);font-size:12px;color:var(--text-3);margin-top:auto}

/* post nav */
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:8px}
.postnav a{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;background:#FFF;
  border:1px solid var(--line);border-radius:var(--r-card);min-height:44px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.postnav a:hover{border-color:var(--copper);transform:translateY(-2px);box-shadow:var(--sh-2)}
.postnav .nav-k{font-size:12px;letter-spacing:.14em;color:var(--copper)}
.postnav .nav-t{font-size:15px;color:var(--text);font-weight:600}
.postnav .next{text-align:right;align-items:flex-end}

/* faq */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:20px 4px;min-height:44px;font-size:16.5px;font-weight:600;color:var(--text);
  font-family:var(--serif);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--copper)}
.faq-item summary .chev{
  flex:0 0 auto;width:20px;height:20px;position:relative;transition:transform .26s var(--ease);
}
.faq-item summary .chev::before,.faq-item summary .chev::after{
  content:"";position:absolute;background:var(--ink-600);border-radius:2px;
}
.faq-item summary .chev::before{left:0;right:0;top:9px;height:2px}
.faq-item summary .chev::after{top:0;bottom:0;left:9px;width:2px;transition:opacity .26s var(--ease)}
.faq-item[open] summary .chev{transform:rotate(180deg)}
.faq-item[open] summary .chev::after{opacity:0}
.faq-item .faq-a{padding:0 4px 22px;color:var(--text-2);font-size:15.5px;line-height:1.85;max-width:820px}

/* cta band */
.cta-band{background:var(--ink-900);border-radius:var(--r-card);padding:48px 44px;color:#EDF2EF;
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.cta-band h2{color:#FFFFFF;font-size:clamp(1.4rem,2.3vw,1.9rem);line-height:1.3}
.cta-band p{color:#B9C6C1;margin:14px 0 0;font-size:15.5px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.cta-band .btn-primary{background:var(--copper);color:#FFF8F3}
.cta-band .btn-primary:hover{background:var(--copper-l);color:#2A1206}
.cta-band .btn-ghost{border-color:rgba(220,231,225,.5);color:#EDF2EF}
.cta-band .btn-ghost:hover{background:rgba(220,231,225,.12);color:#FFF}

/* footer */
.site-foot{background:var(--ink-900);border-top:2px solid var(--copper);margin-top:72px;padding:56px 0 28px;color:#C9D4CF}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-text{font-family:var(--serif);font-size:17px;font-weight:700;color:#F4F1EA}
.foot-desc{font-size:13.5px;line-height:1.8;color:#93A39D;margin:0;max-width:340px}
.foot-col h4{font-family:var(--sans);font-size:13px;letter-spacing:.14em;color:var(--copper-l);margin-bottom:16px;font-weight:700}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:14px;color:#C9D4CF;display:inline-flex;min-height:24px;align-items:center}
.foot-col a:hover{color:var(--copper-l)}
.foot-info{font-size:13.5px;line-height:1.8;color:#93A39D;margin:0}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(220,231,225,.14);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:#7E8D88;
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .post-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .post-rail{position:static;max-width:none;flex-direction:row;flex-wrap:wrap}
  .rail-card{flex:1 1 280px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  :root{--rail:76px}
  .side-inner{padding:24px 0;align-items:center}
  .side-brand .brand-text,.side-link .side-label,.side-link .side-num,.side-contact,.side-cta span,.side-foot span{display:none}
  .side-nav{width:100%;margin-top:28px}
  .side-link{justify-content:center;padding:10px 0;gap:0}
  .side-dot{margin:0}
  .side-cta{width:44px;height:44px;min-height:44px;padding:0;border-radius:12px}
  .side-cta::after{content:"→";font-size:16px}
  .side-contact{display:none}
  .side-foot{align-items:center;padding-top:16px}
  .to-top{width:44px;padding:0;font-size:0}
  .to-top::after{content:"↑";font-size:15px;color:#C9D4CF}
  .side-link::after{
    content:attr(data-label);position:absolute;left:calc(100% + 10px);top:50%;
    transform:translateY(-50%);background:var(--ink-900);color:#EDF2EF;font-size:13px;
    padding:6px 12px;border-radius:8px;white-space:nowrap;opacity:0;visibility:hidden;
    transition:opacity .2s var(--ease),visibility .2s var(--ease);pointer-events:none;z-index:5;
  }
  .side-link:hover::after{opacity:1;visibility:visible}
  .cta-band{grid-template-columns:1fr;padding:40px 28px}
  .cta-actions{justify-content:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--rail:0px}
  body{font-size:16px}
  .app-shell{display:none}
  .mobile-bar{display:flex}
  .app-main{margin-left:0;padding-top:60px}
  .grid-container{padding-left:18px;padding-right:18px}
  .page-wrap{padding-top:24px}
  .post-head h1{font-size:clamp(1.55rem,6vw,2.1rem)}
  .post-body{font-size:16px;line-height:1.85}
  .post-body h2{margin-top:32px}
  .section{padding:48px 0}
  .related-grid{grid-template-columns:1fr}
  .postnav{grid-template-columns:1fr}
  .postnav .next{text-align:left;align-items:flex-start}
  .cta-band{padding:32px 22px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column}
  .faq-item summary{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#0E1A17;
  --primary:#123A32;
  --primary-2:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-2:#D98A4E;
  --bg:#FAF8F4;
  --surface:#F1ECE4;
  --line:#E2DCD2;
  --text:#14181A;
  --muted:#5A615D;
  --weak:#8B918D;
  --ok:#2F7D5B;
  --warn:#C08A1E;
  --err:#B4432F;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(20,24,26,.04), 0 8px 24px -12px rgba(20,24,26,.10);
  --sh-2:0 2px 6px rgba(20,24,26,.07), 0 18px 40px -16px rgba(20,24,26,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'IBM Plex Mono','Barlow',monospace;
  --side-w:248px;
  --side-w-sm:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;border-radius:6px}
::selection{background:var(--mist);color:var(--primary)}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;background:var(--primary);color:#fff;
  padding:12px 20px;border-radius:0 0 var(--r-btn) 0;font-size:14px
}
.skip-link:focus{left:0}
.grid-container{width:100%;max-width:1240px;margin:0 auto;padding-left:32px;padding-right:32px}
@media (max-width:767px){.grid-container{padding-left:20px;padding-right:20px}}

/* ============ 左侧壳层 ============ */
.side-shell{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:60;
  background:var(--ink);display:flex;flex-direction:column;justify-content:space-between;
  padding:28px 18px 20px;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:11px;padding:0 8px 22px;text-decoration:none}
.brand-mark{display:inline-flex;flex:0 0 auto}
.brand-text{
  font-family:var(--serif);font-weight:700;font-size:16px;color:#F3F7F4;
  letter-spacing:.01em;line-height:1.3
}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.side-link{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:46px;padding:10px 12px;border-radius:10px;
  color:#C9D4CF;font-size:14.5px;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:0;
  background:var(--copper);border-radius:0 3px 3px 0;transition:width .22s var(--ease)
}
.side-link:hover{background:rgba(220,231,225,.07);color:#FFFFFF}
.side-link:hover::before{width:2px}
.side-link.is-active{background:rgba(220,231,225,.10);color:#FFFFFF}
.side-link.is-active::before{width:3px}
.side-num{font-family:var(--mono);font-size:12px;color:var(--copper-2);flex:0 0 auto;min-width:20px}
.side-dot{width:6px;height:6px;border-radius:50%;background:var(--copper-2);flex:0 0 auto;margin:0 7px}
.side-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin:20px 4px 0;min-height:46px;padding:0 16px;border-radius:var(--r-btn);
  background:var(--copper);color:#FFFFFF;font-size:14.5px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease)
}
.side-cta:hover{background:var(--copper-2);transform:translateY(-1px)}
.side-contact{
  margin:22px 4px 0;padding:14px 14px 16px;border-radius:12px;
  background:rgba(220,231,225,.06);border:1px solid rgba(220,231,225,.12)
}
.side-contact-title{
  font-size:12px;letter-spacing:.16em;color:var(--copper-2);margin-bottom:8px
}
.side-contact p{font-size:13px;line-height:1.7;color:#A9B6B0}
.side-bottom{
  margin-top:26px;padding:16px 8px 0;border-top:1px solid rgba(220,231,225,.13);
  display:flex;flex-direction:column;gap:10px;font-size:12px;color:#7F8A85
}
.to-top{
  align-self:flex-start;background:none;border:1px solid rgba(220,231,225,.22);
  color:#C9D4CF;font-size:12.5px;padding:7px 13px;border-radius:8px;cursor:pointer;
  min-height:36px;transition:border-color .2s var(--ease),color .2s var(--ease)
}
.to-top:hover{border-color:var(--copper);color:var(--copper-2)}

/* ============ 移动端顶部栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:var(--ink);border-bottom:1px solid rgba(220,231,225,.12);
  align-items:center;justify-content:space-between;padding:0 14px 0 18px
}
.topbar-brand{
  display:flex;align-items:center;gap:9px;color:#F3F7F4;
  font-family:var(--serif);font-weight:700;font-size:15.5px
}
.burger{
  width:44px;height:44px;display:inline-flex;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;
  background:none;border:0;cursor:pointer;border-radius:10px
}
.burger span{display:block;width:20px;height:2px;background:#DCE7E1;border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.burger:hover span{background:var(--copper-2)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,26,23,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s
}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:84vw;z-index:90;
  background:var(--ink);padding:22px 18px;overflow-y:auto;
  transform:translateX(-102%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .drawer{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 4px 18px}
.drawer-close{
  width:44px;height:44px;border:0;background:rgba(220,231,225,.08);color:#DCE7E1;
  border-radius:10px;font-size:20px;line-height:1;cursor:pointer;transition:background .2s
}
.drawer-close:hover{background:rgba(184,90,43,.35)}
.drawer .side-nav{margin-top:4px}

.main-wrap{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}

@media (max-width:1023px) and (min-width:768px){
  .side-shell{width:var(--side-w-sm);padding:20px 10px 16px}
  .brand{padding:0 0 20px;justify-content:center}
  .side-brand-text,.side-label,.side-contact{display:none}
  .side-link{justify-content:center;padding:12px 0}
  .side-num{min-width:auto}
  .side-link::after{
    content:attr(data-label);position:absolute;left:100%;top:50%;transform:translateY(-50%);
    margin-left:12px;background:var(--ink);color:#EAF1EE;border:1px solid rgba(220,231,225,.18);
    padding:6px 11px;border-radius:8px;font-size:13px;white-space:nowrap;
    opacity:0;pointer-events:none;transition:opacity .18s var(--ease);z-index:99
  }
  .side-link:hover::after{opacity:1}
  .side-cta{margin:18px 0 0;padding:0;min-width:48px}
  .side-cta .cta-text{display:none}
  .side-bottom{padding:14px 0 0;align-items:center}
  .to-top{font-size:0;padding:0;width:40px;height:40px}
  .to-top::after{content:"↑";font-size:15px}
  .main-wrap{margin-left:var(--side-w-sm)}
}
@media (max-width:767px){
  .side-shell{display:none}
  .topbar{display:flex}
  .main-wrap{margin-left:0;padding-top:60px}
}

/* ============ 通用排版 ============ */
.section{padding:96px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:46px}
.section-kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--weak);
  text-transform:uppercase;margin-bottom:14px
}
.section-head h2{
  position:relative;padding-left:18px;font-family:var(--serif);font-weight:700;
  font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.32;color:var(--primary);margin-bottom:14px
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;
  background:var(--copper);border-radius:3px
}
.section-head p{color:var(--muted);font-size:16.5px;line-height:1.85;max-width:700px}
@media (max-width:767px){.section{padding:60px 0}.section-head{margin-bottom:32px}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  border:1.5px solid transparent;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)
}
.btn-primary{background:var(--primary);color:#FAF8F4;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--copper);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--mist);transform:translateY(-1px)}
.btn-arrow{transition:transform .2s var(--ease);display:inline-block}
.btn:hover .btn-arrow{transform:translateX(3px)}
.btn-light{background:#FAF8F4;color:var(--primary)}
.btn-light:hover{background:var(--copper);color:#fff;transform:translateY(-1px)}
.btn-line-light{background:transparent;border-color:rgba(250,248,244,.55);color:#EDF3F0}
.btn-line-light:hover{border-color:var(--copper-2);color:#fff;background:rgba(184,90,43,.16)}
.btn[disabled],.btn.is-loading{opacity:.6;cursor:not-allowed;transform:none}
.btn-group{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 面包屑 ============ */
.crumb-bar{background:var(--bg);border-bottom:1px solid var(--line);padding:18px 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--weak)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--copper)}
.crumb .sep{color:#C3BBAE}
.crumb .current{color:var(--primary);font-weight:600}

/* ============ Hero ============ */
.hero{
  position:relative;padding:64px 0 88px;overflow:hidden;
  background:
    radial-gradient(1200px 420px at 82% -10%, rgba(220,231,225,.75), rgba(220,231,225,0) 70%),
    linear-gradient(180deg,#FAF8F4 0%,#F1ECE4 100%);
  border-bottom:1px solid var(--line)
}
.hero-grid{align-items:center}
.hero-grid > .cell{padding-left:12px;padding-right:12px}
.hero-grid{margin-left:-12px;margin-right:-12px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  color:var(--copper);background:rgba(184,90,43,.09);
  border:1px solid rgba(184,90,43,.22);border-radius:999px;
  padding:6px 14px;margin-bottom:22px
}
.hero h1{
  font-family:var(--serif);font-weight:900;
  font-size:clamp(2rem,4.2vw,3.4rem);line-height:1.16;letter-spacing:-.02em;
  color:var(--primary);margin-bottom:20px
}
.hero .lead{font-size:17px;line-height:1.88;color:var(--muted);max-width:600px;margin-bottom:16px}
.hero .lead-sub{font-size:15px;line-height:1.85;color:var(--weak);max-width:600px;margin-bottom:30px}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);box-shadow:var(--sh-2);background:var(--surface)
}
.hero-media::after{
  content:"";position:absolute;inset:auto -14px -14px auto;width:120px;height:120px;
  border:2px solid rgba(184,90,43,.28);border-radius:var(--r-img);z-index:-1
}
.hero-tagbar{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;
  padding-top:24px;border-top:1px solid var(--line)
}
.tag{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--primary);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;
  box-shadow:var(--sh-1)
}
.tag i{width:6px;height:6px;border-radius:50%;background:var(--copper);display:inline-block}
@media (max-width:1023px){
  .hero{padding:52px 0 64px}
  .hero-media{margin-top:36px}
}
@media (max-width:767px){
  .hero{padding:40px 0 52px}
  .hero h1{font-size:clamp(1.75rem,7.6vw,2.3rem)}
}

/* ============ 图文卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.card{
  position:relative;display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease)
}
.card::before{
  content:"";position:absolute;top:0;left:50%;right:50%;height:2px;
  background:var(--copper);transition:left .3s var(--ease),right .3s var(--ease);z-index:2
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.card:hover::before{left:0;right:0}
.card-media{position:relative;background:var(--surface)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-badge{
  position:absolute;left:14px;top:14px;background:rgba(14,26,23,.82);color:#EAF1EE;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;
  padding:5px 11px;border-radius:999px;backdrop-filter:blur(2px)
}
.card-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.card-num{
  font-family:var(--mono);font-size:13px;color:var(--copper);
  letter-spacing:.1em;margin-bottom:10px
}
.card-body h3{
  font-family:var(--serif);font-weight:700;font-size:1.19rem;line-height:1.45;
  color:var(--primary);margin-bottom:12px
}
.card-body p{font-size:15px;line-height:1.82;color:var(--muted)}
.card-points{margin-top:16px;display:flex;flex-direction:column;gap:9px}
.card-points li{position:relative;padding-left:16px;font-size:14.5px;color:var(--muted);line-height:1.7}
.card-points li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;
  background:var(--copper);border-radius:1px
}
@media (max-width:900px){.card-grid{grid-template-columns:1fr;gap:22px}}

/* ============ 提示条 ============ */
.note-strip{
  margin-top:36px;background:#fff;border:1px solid var(--line);border-left:3px solid var(--copper);
  border-radius:12px;padding:20px 24px;display:flex;gap:14px;align-items:flex-start;
  box-shadow:var(--sh-1)
}
.note-strip .note-icon{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--mist);
  display:flex;align-items:center;justify-content:center;color:var(--primary)
}
.note-strip p{font-size:14.5px;color:var(--muted);line-height:1.8}
.note-strip strong{color:var(--primary)}

/* ============ 数据条 ============ */
.data-band{background:var(--primary);padding:56px 0}
.data-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}
.data-item{border-left:1px solid rgba(220,231,225,.2);padding-left:22px}
.data-num{
  font-family:var(--mono);font-size:clamp(2rem,3.4vw,3rem);line-height:1.1;
  color:var(--copper-2);font-weight:600
}
.data-num small{font-size:.44em;margin-left:4px;color:rgba(220,231,225,.75)}
.data-item p{margin-top:10px;font-size:14px;line-height:1.7;color:#B9C7C1}
@media (max-width:900px){.data-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}}
@media (max-width:520px){.data-row{grid-template-columns:1fr}}

/* ============ FAQ ============ */
.faq{margin-top:8px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:none;border:0;text-align:left;cursor:pointer;
  padding:24px 4px;min-height:44px;font-size:17px;font-weight:600;color:var(--text);
  font-family:var(--sans);transition:color .2s var(--ease)
}
.faq-q:hover{color:var(--copper)}
.faq-q .faq-chevron{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  transition:transform .28s var(--ease),border-color .2s var(--ease),background .2s var(--ease)
}
.faq-item.is-open .faq-chevron{transform:rotate(180deg);border-color:var(--copper);background:rgba(184,90,43,.08)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
.faq-a p{
  padding:0 4px 24px;max-width:780px;font-size:15.5px;line-height:1.9;color:var(--muted)
}

/* ============ CTA 与表单 ============ */
.cta-band{background:var(--ink);padding:80px 0;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(184,90,43,.18),rgba(184,90,43,0) 68%);
  pointer-events:none
}
.cta-band h2{
  font-family:var(--serif);font-weight:700;font-size:clamp(1.5rem,2.4vw,2rem);
  line-height:1.34;color:#FFFFFF;margin-bottom:16px
}
.cta-band .cta-copy p{color:#B9C7C1;font-size:16px;line-height:1.85;max-width:520px}
.cta-list{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-list li{position:relative;padding-left:18px;font-size:14.5px;color:#A9B6B0;line-height:1.7}
.cta-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;
  border-radius:1px;background:var(--copper-2)
}
.form-panel{
  background:rgba(250,248,244,.04);border:1px solid rgba(220,231,225,.16);
  border-radius:16px;padding:30px;position:relative;z-index:2
}
.form-panel h3{
  font-family:var(--serif);font-size:1.16rem;color:#FFFFFF;margin-bottom:6px;font-weight:700
}
.form-panel .form-hint{font-size:13.5px;color:#93A19B;margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;letter-spacing:.02em;color:#A9B6B0;margin-bottom:7px}
.field input,.field textarea{
  width:100%;padding:13px 15px;font-size:15px;font-family:inherit;color:var(--text);
  background:#FAF8F4;border:1px solid rgba(220,231,225,.35);border-radius:10px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease)
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#9AA39E}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--copper);box-shadow:0 0 0 3px rgba(184,90,43,.22)
}
.form-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.form-privacy{font-size:13px;color:#8B918D;line-height:1.7;display:flex;gap:8px;align-items:flex-start}
.form-privacy svg{flex:0 0 auto;margin-top:2px}
.form-toast{
  margin-top:14px;font-size:13.5px;color:#9FD4BB;display:none
}
.form-toast.is-on{display:block}
@media (max-width:767px){
  .cta-band{padding:60px 0}
  .form-panel{padding:22px;margin-top:32px}
}

/* ============ 页脚 ============ */
.site-foot{
  background:var(--ink);color:#C9D4CF;border-top:2px solid var(--copper);
  padding:64px 0 0;margin-top:auto
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.foot-brand .brand-text{color:#F3F7F4}
.foot-desc{font-size:14px;line-height:1.85;color:#93A19B;max-width:340px}
.foot-col h4{color:#FFFFFF;font-size:14px;font-weight:600;letter-spacing:.06em;margin-bottom:16px}
.foot-col ul li{margin-bottom:11px}
.foot-col a{color:#C9D4CF;font-size:14px}
.foot-col a:hover{color:var(--copper-2)}
.foot-info{font-size:14px;line-height:1.85;color:#93A19B}
.foot-bottom{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  margin-top:48px;padding:22px 0;border-top:1px solid rgba(220,231,225,.14);
  font-size:13px;color:#7F8A85
}
@media (max-width:1023px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

/* roulang page: category2 */
:root{
  --ink:#123A32;
  --ink-2:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-2:#D98A4E;
  --bg:#FAF8F4;
  --card:#F1ECE4;
  --line:#E2DCD2;
  --text:#14181A;
  --text-2:#5A615D;
  --text-3:#8B918D;
  --dark:#0E1A17;
  --ok:#2F7D5B;
  --warn:#C08A1E;
  --err:#B4432F;
  --paper:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,24,26,.04), 0 8px 24px -12px rgba(20,24,26,.10);
  --sh-2:0 2px 6px rgba(20,24,26,.06), 0 20px 40px -20px rgba(20,24,26,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shell-w:248px;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  font-family:'Noto Serif SC','Source Han Serif SC','Songti SC',Georgia,serif;
  font-weight:700;
  color:var(--text);
  margin:0;
  letter-spacing:-0.01em;
}
p{margin:0}
ul,ol{margin:0;padding:0}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;background:none;transition:color .22s var(--ease)}
a:hover{color:var(--copper)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;border-radius:4px}
::selection{background:var(--mist);color:var(--ink)}

.wrap{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- app shell ---------- */
.shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--shell-w);
  background:var(--dark);
  color:#C9D4CF;
  display:flex;
  flex-direction:column;
  padding:28px 20px 22px;
  overflow-y:auto;
  z-index:60;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#F4F1EA;
  flex:0 0 auto;
}
.brand:hover{color:#F4F1EA}
.brand-mark{display:inline-flex;flex:0 0 auto}
.brand-text{
  font-family:'Noto Serif SC','Songti SC',serif;
  font-weight:700;
  font-size:16px;
  line-height:1.25;
  letter-spacing:.01em;
}

.side-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
  margin-top:34px;
  flex:1 1 auto;
}
.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:10px 12px 10px 16px;
  border-radius:10px;
  color:#C0CCC6;
  font-size:14.5px;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.side-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:0;height:22px;
  border-radius:2px;
  background:var(--copper);
  transition:width .22s var(--ease);
}
.side-link:hover{background:rgba(220,231,225,.08);color:#F4F1EA}
.side-link.is-active{background:rgba(220,231,225,.11);color:#FAF8F4}
.side-link.is-active::before{width:3px}
.side-num{
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:11px;
  letter-spacing:.08em;
  color:var(--copper-2);
  flex:0 0 auto;
}
.side-dot{
  width:6px;height:6px;
  border-radius:2px;
  background:var(--copper-2);
  flex:0 0 auto;
}
.side-label{flex:1 1 auto}

.shell-foot{
  margin-top:26px;
  display:flex;
  flex-direction:column;
  gap:14px;
  flex:0 0 auto;
}
.side-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  width:100%;
  min-height:44px;
  padding:12px 16px;
  border-radius:var(--r-btn);
  background:var(--copper);
  color:#FFFFFF;
  font-size:14px;
  font-weight:600;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.side-cta:hover{background:#A44E24;color:#FFFFFF;transform:translateY(-1px)}
.side-contact{
  padding:12px 14px;
  border:1px solid rgba(220,231,225,.16);
  border-radius:10px;
  font-size:12.5px;
  line-height:1.7;
  color:#9FB0AA;
}
.side-contact strong{display:block;color:#DCE7E1;font-weight:600;margin-bottom:4px;font-size:12.5px}
.side-legal{font-size:11.5px;color:#75847E;line-height:1.6}
.to-top{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  align-self:flex-start;
  min-height:44px;
  padding:8px 14px;
  border:1px solid rgba(220,231,225,.2);
  border-radius:8px;
  font-size:12.5px;
  color:#9FB0AA;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.to-top:hover{border-color:var(--copper);color:#F4F1EA;background:rgba(184,90,43,.18)}

/* ---------- mobile bar + drawer ---------- */
.mobile-bar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:60px;
  padding:0 16px;
  align-items:center;
  justify-content:space-between;
  background:var(--dark);
  z-index:80;
}
.mobile-bar .brand{color:#F4F1EA}
.burger{
  width:44px;height:44px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border-radius:10px;
}
.burger span{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:#DCE7E1;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
body.drawer-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.drawer-open .burger span:nth-child(2){opacity:0}
body.drawer-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(14,26,23,.5);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s var(--ease),visibility .28s var(--ease);
  z-index:90;
}
.drawer{
  position:fixed;
  top:0;bottom:0;left:0;
  width:280px;
  padding:24px 18px;
  background:var(--dark);
  display:flex;
  flex-direction:column;
  transform:translateX(-100%);
  transition:transform .3s var(--ease);
  overflow-y:auto;
  z-index:100;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open{overflow:hidden}

/* ---------- main ---------- */
.main{
  margin-left:var(--shell-w);
  min-height:100vh;
  padding-bottom:0;
}

.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-top:28px;
  font-size:13px;
  color:var(--text-3);
}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--copper)}
.crumb .sep{color:var(--line)}
.crumb .now{color:var(--text-2)}

/* ---------- hero ---------- */
.hero{
  position:relative;
  margin-top:22px;
  padding:74px 40px 62px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:
    linear-gradient(180deg,rgba(250,248,244,.94),rgba(250,248,244,.88)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align:center;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  left:50%;bottom:0;
  transform:translateX(-50%);
  width:120px;height:2px;
  background:var(--copper);
  border-radius:2px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper);
  margin-bottom:18px;
}
.eyebrow::before,
.eyebrow::after{
  content:"";
  width:18px;height:1px;
  background:var(--copper-2);
  display:inline-block;
}
.hero h1{
  font-size:clamp(2rem,4.2vw,3.35rem);
  line-height:1.16;
  letter-spacing:-0.02em;
  max-width:14em;
  margin:0 auto;
}
.hero-sub{
  max-width:640px;
  margin:20px auto 0;
  font-size:16.5px;
  line-height:1.8;
  color:var(--text-2);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
  margin-top:34px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:13px 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  border:1.5px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn .arw{transition:transform .22s var(--ease)}
.btn-primary{background:var(--ink);color:#FAF8F4}
.btn-primary:hover{background:var(--copper);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn-primary:hover .arw{transform:translateX(3px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--mist);color:var(--ink);transform:translateY(-1px)}
.btn-copper{background:var(--copper);color:#FFFFFF}
.btn-copper:hover{background:#A44E24;color:#FFFFFF;transform:translateY(-1px)}
.btn-copper:hover .arw{transform:translateX(3px)}
.btn-line{background:transparent;color:#EDF3F0;border-color:rgba(220,231,225,.42)}
.btn-line:hover{background:rgba(220,231,225,.12);color:#FFFFFF;border-color:rgba(220,231,225,.75)}

.trust{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:0;
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.trust span{
  position:relative;
  padding:0 22px;
  font-size:13.5px;
  color:var(--text-2);
  line-height:1.6;
}
.trust span + span{border-left:1px solid var(--line)}

/* ---------- section basics ---------- */
.sec{padding-top:92px}
.sec-head{max-width:780px;margin-bottom:44px}
.sec-eyebrow{
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper);
  margin-bottom:12px;
}
.sec-head h2{
  font-size:clamp(1.5rem,2.4vw,2rem);
  line-height:1.32;
  margin-bottom:14px;
}
.sec-lead{
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-2);
  max-width:720px;
}

/* ---------- steps ---------- */
.steps{
  position:relative;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:36px;
}
.steps::before{
  content:"";
  position:absolute;
  top:34px;
  left:16.66%;
  right:16.66%;
  height:1px;
  background:var(--line);
}
.step{
  position:relative;
  text-align:center;
  padding:0 6px;
}
.step-node{
  position:relative;
  width:68px;height:68px;
  margin:0 auto 22px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--paper);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:21px;
  font-weight:600;
  color:var(--copper);
  letter-spacing:.02em;
}
.step h3,
.step h2{
  font-size:1.14rem;
  margin-bottom:10px;
}
.step p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- compare panels ---------- */
.compare{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:34px 32px;
  box-shadow:var(--sh-1);
}
.panel-good{border-top:3px solid var(--ok)}
.panel-risk{border-top:3px solid var(--err)}
.panel-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:11.5px;
  letter-spacing:.14em;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:var(--mist);
  color:var(--ink);
  margin-bottom:18px;
}
.panel-risk .panel-tag{background:#F3E0D9;color:#8C3B27}
.panel h3{
  font-size:1.28rem;
  margin-bottom:8px;
}
.panel .panel-note{
  font-size:14px;
  color:var(--text-3);
  margin-bottom:20px;
  line-height:1.75;
}
.panel ul{list-style:none}
.panel li{
  position:relative;
  padding:15px 0 15px 26px;
  border-top:1px solid var(--line);
  font-size:14.5px;
  line-height:1.75;
  color:var(--text-2);
}
.panel li:first-child{border-top:0;padding-top:16px}
.panel li::before{
  content:"";
  position:absolute;
  left:0;
  top:23px;
  width:10px;height:10px;
  border-radius:3px;
  background:var(--mist);
}
.panel li:first-child::before{top:24px}
.panel-good li::before{background:var(--ok)}
.panel-risk li::before{background:var(--err)}

/* ---------- verify cards ---------- */
.cards3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.vcard{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px 28px 28px;
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.vcard::after{
  content:"";
  position:absolute;
  top:0;left:50%;
  transform:translateX(-50%);
  width:0;height:2px;
  background:var(--copper);
  transition:width .28s var(--ease);
}
.vcard:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.vcard:hover::after{width:100%}
.vcard .num{
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--copper);
  margin-bottom:16px;
}
.vcard h3{font-size:1.16rem;margin-bottom:12px}
.vcard p{font-size:14.5px;line-height:1.8;color:var(--text-2)}
.vcard .meta{
  margin-top:auto;
  padding-top:20px;
  font-size:13px;
  color:var(--text-3);
  border-top:1px solid var(--line);
  margin-top:22px;
}

/* ---------- dark rule band ---------- */
.rule-band{
  background:var(--ink);
  border-radius:var(--r-card);
  padding:54px 48px 50px;
  color:#E6EEE9;
}
.rule-band .band-eyebrow{
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper-2);
  margin-bottom:14px;
}
.rule-band h2{
  color:#F7F4EE;
  font-size:clamp(1.4rem,2.1vw,1.8rem);
  line-height:1.35;
  max-width:22em;
}
.rule-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:36px;
  margin-top:40px;
  padding-top:34px;
  border-top:1px solid rgba(220,231,225,.18);
}
.rule .rule-num{
  font-family:'IBM Plex Mono','Barlow',monospace;
  font-size:13px;
  letter-spacing:.12em;
  color:var(--copper-2);
}
.rule h3{
  color:#F7F4EE;
  font-size:1.06rem;
  margin:12px 0 10px;
}
.rule p{
  font-size:14px;
  line-height:1.8;
  color:#B4C3BD;
}

/* ---------- FAQ ---------- */
.faq{
  border-top:1px solid var(--line);
  max-width:940px;
}
.faq details{
  border-bottom:1px solid var(--line);
}
.faq summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:44px;
  padding:22px 0;
  cursor:pointer;
  list-style:none;
  font-family:'Noto Serif SC','Songti SC',serif;
  font-weight:700;
  font-size:16.5px;
  line-height:1.6;
  color:var(--text);
  transition:color .22s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--copper)}
.faq summary::after{
  content:"";
  flex:0 0 auto;
  width:9px;height:9px;
  margin-top:-5px;
  border-right:2px solid var(--copper);
  border-bottom:2px solid var(--copper);
  transform:rotate(45deg);
  transition:transform .28s var(--ease),margin .28s var(--ease);
}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:5px}
.faq .faq-body{
  padding:0 0 24px;
  max-width:800px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-2);
}

/* ---------- CTA band ---------- */
.cta-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:54px 48px;
  border-radius:var(--r-card);
  background:
    linear-gradient(135deg, rgba(14,26,23,.94), rgba(18,58,50,.92)),
    url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
  border-top:2px solid var(--copper);
  color:#EDF3F0;
}
.cta-copy{max-width:600px}
.cta-copy h2{
  color:#F7F4EE;
  font-size:clamp(1.35rem,2.1vw,1.75rem);
  line-height:1.35;
  margin-bottom:12px;
}
.cta-copy p{
  font-size:14.8px;
  line-height:1.85;
  color:#B4C3BD;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

/* ---------- footer ---------- */
.site-foot{
  margin-top:96px;
  padding:64px 0 32px;
  background:var(--dark);
  border-top:2px solid var(--copper);
  color:#C9D4CF;
}
.site-foot .grid-container{
  max-width:1240px;
  padding-left:32px;
  padding-right:32px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.foot-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  color:#F4F1EA;
  font-family:'Noto Serif SC','Songti SC',serif;
  font-weight:700;
  font-size:16px;
}
.foot-desc{
  font-size:13.5px;
  line-height:1.85;
  color:#9FB0AA;
  max-width:340px;
}
.foot-col h4{
  font-family:'Noto Sans SC','PingFang SC',sans-serif;
  font-size:14px;
  font-weight:600;
  color:#EDF3F0;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.foot-col a{
  color:#C9D4CF;
  font-size:13.5px;
  line-height:1.6;
}
.foot-col a:hover{color:var(--copper-2)}
.foot-info{
  font-size:13.5px;
  line-height:1.85;
  color:#9FB0AA;
}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:14px;
  margin-top:48px;
  padding-top:24px;
  border-top:1px solid rgba(220,231,225,.14);
  font-size:12.5px;
  color:#7C8B85;
  line-height:1.7;
}

/* ---------- reveal ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .cards3{grid-template-columns:repeat(2,1fr)}
  .rule-grid{grid-template-columns:repeat(3,1fr);gap:28px}
}

@media (max-width:1023px){
  :root{--shell-w:76px}
  .shell{
    padding:20px 0 20px;
    align-items:center;
    overflow:visible;
  }
  .brand{justify-content:center}
  .brand-text{display:none}
  .side-nav{width:100%;align-items:center;margin-top:26px}
  .side-link{
    width:48px;
    justify-content:center;
    padding:10px 0;
    gap:0;
  }
  .side-link .side-label{display:none}
  .side-num{font-size:12px;color:var(--copper-2)}
  .side-link::after{
    content:attr(data-label);
    position:absolute;
    left:calc(100% + 12px);
    top:50%;
    transform:translateY(-50%);
    padding:6px 10px;
    border-radius:8px;
    background:var(--ink);
    color:#F4F1EA;
    font-size:12.5px;
    white-space:nowrap;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s var(--ease);
    z-index:10;
  }
  .side-link:hover::after{opacity:1}
  .side-cta,
  .side-contact,
  .side-legal{display:none}
  .shell-foot{margin-top:18px;align-items:center;gap:0}
  .to-top{
    width:44px;
    padding:0;
    font-size:0;
    border-radius:10px;
  }
  .to-top::before{
    content:"↑";
    font-size:16px;
    line-height:1;
    color:#C9D4CF;
  }

  .wrap{padding:0 24px}
  .hero{padding:58px 28px 52px}
  .sec{padding-top:72px}
  .steps{gap:22px}
  .steps::before{left:16.66%;right:16.66%}
  .compare{grid-template-columns:1fr;gap:20px}
  .cards3{grid-template-columns:1fr 1fr}
  .rule-band{padding:44px 32px}
  .rule-grid{grid-template-columns:1fr;gap:24px;padding-top:26px;margin-top:30px}
  .rule{padding-bottom:20px;border-bottom:1px solid rgba(220,231,225,.14)}
  .rule:last-child{border-bottom:0;padding-bottom:0}
  .cta-band{padding:44px 32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-foot .grid-container{padding-left:24px;padding-right:24px}
}

@media (max-width:767px){
  .shell{display:none}
  .mobile-bar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .wrap{padding:0 18px}
  .crumb{padding-top:20px;font-size:12.5px}
  .hero{margin-top:16px;padding:44px 20px 40px;border-radius:var(--r-card)}
  .hero h1{font-size:clamp(1.75rem,7.2vw,2.3rem)}
  .hero-sub{font-size:15px;margin-top:16px}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px;margin-top:26px}
  .hero-actions .btn{width:100%}
  .trust{margin-top:30px;padding-top:18px;gap:10px 0}
  .trust span{padding:0 12px;font-size:12.8px}
  .trust span + span{border-left:0}
  .trust span:nth-child(odd){border-right:1px solid var(--line)}
  .sec{padding-top:58px}
  .sec-head{margin-bottom:30px}
  .steps{grid-template-columns:1fr;gap:30px}
  .steps::before{display:none}
  .step{text-align:left;display:grid;grid-template-columns:68px 1fr;gap:18px;align-items:start;padding:0}
  .step-node{margin:0}
  .step-body{padding-top:4px}
  .compare{grid-template-columns:1fr}
  .panel{padding:26px 22px}
  .cards3{grid-template-columns:1fr}
  .rule-band{padding:34px 22px}
  .rule-grid{margin-top:24px;padding-top:22px}
  .faq summary{font-size:15.5px;padding:18px 0;gap:14px}
  .cta-band{padding:34px 22px;gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-foot{margin-top:64px;padding:46px 0 26px}
  .site-foot .grid-container{padding-left:18px;padding-right:18px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:8px;margin-top:32px}
  .to-top{}
}

@media (max-width:520px){
  .wrap{padding:0 16px}
  .hero{padding:38px 16px 34px}
  .panel{padding:22px 18px}
  .vcard{padding:24px 20px}
  .rule-band{padding:28px 18px}
  .cta-band{padding:28px 18px}
  .trust span{padding:0 8px;font-size:12.2px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#123A32;
  --ink-2:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-l:#D98A4E;
  --bg:#FAF8F4;
  --card:#F1ECE4;
  --line:#E2DCD2;
  --text:#14181A;
  --text-2:#5A615D;
  --text-3:#8B918D;
  --dark:#0E1A17;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:16px;
  --sh-1:0 1px 2px rgba(20,24,26,.04), 0 8px 24px -12px rgba(20,24,26,.10);
  --sh-2:0 2px 4px rgba(20,24,26,.06), 0 16px 36px -14px rgba(20,24,26,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'IBM Plex Mono','Barlow',ui-monospace,SFMono-Regular,Menlo,monospace;
  --side-w:76px;
  --side-pad:12px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--ink);text-decoration:none}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;border-radius:4px}

/* Foundation 覆盖 */
h1,h2,h3,h4,h5{
  font-family:var(--serif);
  font-weight:800;
  color:var(--ink);
  line-height:1.28;
  letter-spacing:-0.01em;
  margin:0 0 14px;
}
h1{font-size:clamp(2rem,3.6vw,3rem);line-height:1.16;letter-spacing:-0.02em}
h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.3}
h3{font-size:1.25rem}
.grid-container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.grid-x{margin-left:0;margin-right:0}
.button,.button.primary,.button.secondary{
  background:none;border:0;padding:0;font-family:inherit;font-size:inherit;color:inherit;
}

/* ---------- 布局壳层 ---------- */
.page-shell{
  margin-left:0;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
main{flex:1 1 auto}

/* ---------- 侧栏 ---------- */
.side-shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:280px;
  background:var(--dark);
  padding:20px 16px;
  display:flex;
  flex-direction:column;
  z-index:60;
  transform:translateX(-100%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
body.nav-open .side-shell{transform:translateX(0)}
.side-brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:6px 6px 20px;
  border-bottom:1px solid rgba(220,231,225,.14);
  margin-bottom:20px;
}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{
  font-family:var(--serif);
  font-weight:800;
  font-size:16px;
  color:#F3EFE7;
  letter-spacing:0.01em;
  line-height:1.3;
}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  padding:10px 12px;
  border-radius:10px;
  color:#C9D4CF;
  font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link:hover{background:rgba(220,231,225,.08);color:#FFFFFF}
.side-link.is-active{background:rgba(220,231,225,.14);color:#FFFFFF}
.side-link.is-active::before{
  content:"";
  position:absolute;
  left:calc(-1 * var(--side-pad));
  top:9px;bottom:9px;
  width:3px;
  background:var(--copper);
  border-radius:0 3px 3px 0;
}
.side-num{
  font-family:var(--mono);
  font-size:12px;
  color:var(--copper-l);
  letter-spacing:.06em;
  flex:0 0 auto;
}
.side-dot{
  width:8px;height:8px;
  border-radius:2px;
  border:1.5px solid var(--copper-l);
  flex:0 0 auto;
}
.side-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-cta-wrap{margin-top:22px}
.side-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  width:100%;
  min-height:46px;
  padding:12px 16px;
  border-radius:var(--r-btn);
  background:var(--copper);
  color:#FFFFFF;
  font-weight:600;
  font-size:15px;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.side-cta:hover{background:var(--copper-l);transform:translateY(-1px)}
.side-contact{
  margin-top:16px;
  padding:14px;
  border-radius:12px;
  background:rgba(220,231,225,.07);
  border:1px solid rgba(220,231,225,.12);
}
.side-contact h4{
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper-l);
  margin:0 0 8px;
  font-weight:700;
}
.side-contact p{
  margin:0;
  font-size:13px;
  line-height:1.7;
  color:#AEBAB4;
}
.side-foot{
  margin-top:auto;
  padding-top:20px;
  font-size:12px;
  color:#7E8A85;
  line-height:1.7;
}
.side-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:10px;
  min-height:44px;
  color:#C9D4CF;
  font-size:13px;
  transition:color .2s var(--ease);
}
.side-top:hover{color:var(--copper-l)}
.side-close{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  margin-left:auto;
  border:1px solid rgba(220,231,225,.18);
  border-radius:10px;
  background:transparent;
  color:#C9D4CF;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.side-close:hover{border-color:var(--copper);color:#FFFFFF}

.scrim{
  position:fixed;
  inset:0;
  background:rgba(14,26,23,.5);
  opacity:0;
  pointer-events:none;
  transition:opacity .28s var(--ease);
  z-index:55;
}
body.nav-open .scrim{opacity:1;pointer-events:auto}

/* ---------- 顶部栏（移动端） ---------- */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  position:fixed;
  top:0;left:0;right:0;
  height:60px;
  padding:0 16px;
  background:var(--dark);
  z-index:50;
  border-bottom:1px solid rgba(220,231,225,.12);
}
.topbar-brand{display:flex;align-items:center;gap:10px;min-width:0}
.topbar-brand .brand-text{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid rgba(220,231,225,.2);
  background:transparent;
  cursor:pointer;
}
.burger span{
  display:block;
  width:18px;height:2px;
  background:#DCE7E1;
  border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
body.nav-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:767px){
  .page-shell{padding-top:60px}
  .side-shell{width:280px}
}
@media (min-width:768px){
  .topbar{display:none}
  .side-shell{transform:none;width:var(--side-w);padding:20px var(--side-pad)}
  .page-shell{margin-left:var(--side-w)}
  .side-close{display:none}
  .side-label,.side-num,.side-brand .brand-text,.side-contact,.side-foot,.side-cta-wrap{display:none}
  .side-brand{justify-content:center;padding-left:0;padding-right:0}
  .side-link{justify-content:center;padding:10px 0}
  .side-link::after{
    content:attr(data-label);
    position:absolute;
    left:calc(100% + 14px);
    top:50%;
    transform:translateY(-50%) scale(.96);
    background:var(--ink);
    color:#FFFFFF;
    font-size:12px;
    padding:6px 10px;
    border-radius:8px;
    white-space:nowrap;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease);
    z-index:70;
  }
  .side-link:hover::after{opacity:1;transform:translateY(-50%) scale(1)}
}
@media (min-width:1024px){
  :root{--side-w:248px;--side-pad:22px}
  .side-shell{padding:28px var(--side-pad)}
  .side-label,.side-num,.side-brand .brand-text,.side-contact,.side-foot,.side-cta-wrap{display:block}
  .side-num,.side-dot{display:inline-block}
  .side-brand{justify-content:flex-start}
  .side-link{justify-content:flex-start;padding:10px 12px}
  .side-link::after{display:none}
}

/* ---------- 通用组件 ---------- */
.eyebrow{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper);
  font-weight:700;
  margin:0 0 12px;
}
.section{padding:96px 0}
.section.tight{padding:72px 0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-sub{font-size:17px;color:var(--text-2);line-height:1.8;margin:0}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:46px;
  padding:13px 26px;
  border-radius:var(--r-btn);
  font-size:16px;
  font-weight:600;
  border:0;
  cursor:pointer;
  text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn .arrow{transition:transform .22s var(--ease);display:inline-block}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--ink);color:#FAF8F4}
.btn-primary:hover{background:var(--copper);color:#FFFFFF;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-ghost:hover{background:var(--mist);transform:translateY(-1px)}
.btn-light{background:#FAF8F4;color:var(--ink)}
.btn-light:hover{background:var(--copper);color:#FFFFFF;transform:translateY(-1px)}
.tlink{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--ink);
  font-weight:600;
  border-bottom:1px solid var(--ink);
  padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.tlink:hover{color:var(--copper);border-color:var(--copper)}
.badge{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:999px;
  background:var(--mist);
  color:var(--ink-2);
  font-size:12px;
  letter-spacing:.06em;
  font-weight:600;
}

/* ---------- 面包屑 ---------- */
.crumb-bar{
  background:var(--card);
  border-bottom:1px solid var(--line);
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:14px 0;
  font-size:13px;
  color:var(--text-2);
}
.crumb a{color:var(--text-2);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--copper)}
.crumb .sep{color:var(--text-3)}
.crumb .cur{color:var(--ink);font-weight:600}

/* ---------- Hero 通栏大图 + 叠加文字条 ---------- */
.cat-hero{position:relative}
.cat-hero-frame{
  position:relative;
  height:clamp(280px,40vw,470px);
  overflow:hidden;
  background:var(--card);
}
.cat-hero-frame img{width:100%;height:100%;object-fit:cover}
.cat-hero-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(14,26,23,.12) 0%,rgba(14,26,23,.30) 55%,rgba(14,26,23,.68) 100%);
}
.cat-hero-tag{
  position:absolute;
  left:24px;top:24px;
  z-index:2;
  background:rgba(14,26,23,.72);
  color:var(--mist);
  font-size:12px;
  letter-spacing:.16em;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid rgba(220,231,225,.22);
}
.cat-hero-bar{
  position:relative;
  z-index:3;
  margin-top:-96px;
  padding-bottom:8px;
}
.cat-hero-card{
  background:#FFFFFF;
  border-radius:var(--r-modal);
  border-top:3px solid var(--copper);
  box-shadow:var(--sh-2);
  padding:38px 42px 34px;
}
.cat-hero-card h1{margin-bottom:16px}
.lede{
  font-size:17px;
  line-height:1.8;
  color:var(--text-2);
  max-width:62ch;
  margin:0;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  margin-top:26px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-facts span{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-2);
}
.hero-facts span::before{
  content:"";
  width:8px;height:8px;
  background:var(--copper);
  border-radius:2px;
  flex:0 0 auto;
}

/* ---------- 问题卡片 ---------- */
.qcard{
  position:relative;
  height:100%;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px 24px;
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.qcard::before{
  content:"";
  position:absolute;
  top:0;left:50%;right:50%;
  height:2px;
  background:var(--copper);
  transition:left .3s var(--ease),right .3s var(--ease);
}
.qcard:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.qcard:hover::before{left:0;right:0}
.qnum{
  font-family:var(--mono);
  font-size:13px;
  color:var(--copper);
  letter-spacing:.08em;
  display:block;
  margin-bottom:12px;
}
.qcard h3{font-size:1.1rem;margin-bottom:10px;line-height:1.4}
.qcard p{font-size:14.5px;color:var(--text-2);line-height:1.75;margin:0 0 14px}
.qcard ul{margin-top:auto}
.qcard ul li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  margin-bottom:6px;
}
.qcard ul li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:6px;height:6px;
  background:var(--ink-2);
  border-radius:1px;
}

/* ---------- 时间轴 ---------- */
.timeline-wrap{max-width:900px}
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";
  position:absolute;
  left:23px;top:14px;bottom:14px;
  width:1px;
  background:var(--line);
}
.timeline li{
  position:relative;
  padding:0 0 34px 76px;
}
.timeline li:last-child{padding-bottom:0}
.tl-node{
  position:absolute;
  left:0;top:0;
  width:48px;height:48px;
  border-radius:50%;
  background:var(--ink);
  color:var(--copper-l);
  font-family:var(--mono);
  font-size:15px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--ink-2);
  box-shadow:0 0 0 6px var(--bg);
}
.timeline h3{font-size:1.12rem;margin-bottom:8px}
.timeline p{margin:0;font-size:15px;color:var(--text-2);line-height:1.8;max-width:64ch}

/* ---------- 图文要点 ---------- */
.principle{background:var(--card);border-radius:var(--r-card);overflow:hidden}
.principle-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);align-items:stretch}
.principle-media{position:relative;min-height:280px;background:var(--mist)}
.principle-media img{width:100%;height:100%;object-fit:cover}
.principle-body{padding:44px 44px 40px}
.principle-body h2{margin-bottom:14px}
.principle-body > p{color:var(--text-2);font-size:16px;line-height:1.8;margin-bottom:24px}
.pt-list li{
  position:relative;
  padding:16px 0 16px 26px;
  border-top:1px solid var(--line);
}
.pt-list li:first-child{border-top:1px solid var(--line)}
.pt-list li::before{
  content:"";
  position:absolute;
  left:0;top:26px;
  width:8px;height:8px;
  background:var(--copper);
  border-radius:2px;
}
.pt-list strong{
  display:block;
  font-family:var(--serif);
  font-size:1.05rem;
  color:var(--ink);
  margin-bottom:4px;
}
.pt-list span{font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ---------- 深色 CTA 带 ---------- */
.cta-band{
  background:var(--dark);
  border-top:2px solid var(--copper);
  color:#DCE7E1;
}
.cta-band .inner{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:36px;
  align-items:center;
  padding:72px 0;
}
.cta-band h2{color:#F3EFE7;margin-bottom:12px}
.cta-band p{color:#AEBAB4;margin:0;font-size:16px;line-height:1.8;max-width:56ch}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ---------- FAQ ---------- */
.faq-list{border-bottom:1px solid var(--line)}
.faq-item{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:22px 52px 22px 0;
  font-family:var(--serif);
  font-weight:700;
  font-size:1.05rem;
  color:var(--ink);
  line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--copper)}
.faq-item summary::after{
  content:"";
  position:absolute;
  right:16px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--copper);
  border-bottom:2px solid var(--copper);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .26s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-body{
  padding:0 52px 24px 0;
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-2);
  max-width:80ch;
}
.faq-body p:last-child{margin-bottom:0}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--dark);
  border-top:2px solid var(--copper);
  color:#C9D4CF;
  margin-top:0;
}
.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);
  gap:40px;
  padding:64px 0 40px;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand .brand-text{font-size:17px}
.foot-desc{font-size:14px;line-height:1.8;color:#9DAAA4;margin:0;max-width:38ch}
.foot-col h4{
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--copper-l);
  margin:0 0 16px;
  font-weight:700;
}
.foot-col ul li{margin-bottom:10px}
.foot-col a{
  color:#C9D4CF;
  font-size:14.5px;
  transition:color .2s var(--ease);
}
.foot-col a:hover{color:var(--copper-l)}
.foot-info{font-size:14px;line-height:1.8;color:#9DAAA4;margin:0}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding:22px 0 34px;
  border-top:1px solid rgba(220,231,225,.14);
  font-size:13px;
  color:#7E8A85;
}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .foot-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);gap:32px}
  .foot-grid > div:last-child{grid-column:1 / -1}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .cat-hero-bar{margin-top:-72px}
  .cat-hero-card{padding:30px 28px 28px}
  .principle-grid{grid-template-columns:1fr}
  .principle-media{min-height:220px}
  .principle-body{padding:32px 28px 30px}
  .cta-band .inner{grid-template-columns:1fr;padding:56px 0}
  .cta-band .actions{justify-content:flex-start}
}
@media (max-width:767px){
  .grid-container{padding-left:18px;padding-right:18px}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  h1{font-size:clamp(1.75rem,7vw,2.3rem)}
  .cat-hero-frame{height:240px}
  .cat-hero-bar{margin-top:-56px}
  .cat-hero-card{padding:24px 20px 22px;border-radius:14px}
  .cat-hero-tag{left:16px;top:16px;font-size:11px;padding:6px 12px}
  .lede{font-size:16px}
  .hero-actions{gap:10px}
  .btn{width:100%;justify-content:center}
  .hero-facts{gap:10px 20px}
  .sec-head{margin-bottom:30px}
  .timeline li{padding-left:62px;padding-bottom:28px}
  .tl-node{width:42px;height:42px;font-size:14px}
  .timeline::before{left:20px}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 30px}
  .foot-bottom{padding:20px 0 30px}
  .qcard{padding:22px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --ink:#123A32;
  --ink-2:#1E5A4C;
  --mist:#DCE7E1;
  --copper:#B85A2B;
  --copper-2:#D98A4E;
  --bg:#FAF8F4;
  --card:#F1ECE4;
  --line:#E2DCD2;
  --text:#14181A;
  --text-2:#5A615D;
  --text-3:#8B918D;
  --dark:#0E1A17;
  --ok:#2F7D5B;
  --warn:#C08A1E;
  --err:#B4432F;
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'IBM Plex Mono','Barlow','SFMono-Regular',monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:16px;
  --sh-1:0 1px 2px rgba(20,24,26,.04),0 8px 24px -12px rgba(20,24,26,.10);
  --sh-2:0 2px 6px rgba(20,24,26,.06),0 20px 40px -18px rgba(20,24,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --side-w:248px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-lock{overflow:hidden;}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--ink);text-decoration:none;background-color:transparent;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;color:var(--text);}
button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}

/* ---------- Foundation 覆盖 ---------- */
.grid-container{max-width:1240px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
.grid-x{margin-left:-12px;margin-right:-12px;}
.grid-x > .cell{padding-left:12px;padding-right:12px;}
.grid-container .grid-container{padding-left:0;padding-right:0;}

/* ---------- 左侧 App Shell ---------- */
.side-shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  background:var(--dark);
  color:#C9D4CF;
  display:flex;
  flex-direction:column;
  padding:28px 18px 20px;
  z-index:50;
  overflow-y:auto;
}
.side-brand{
  display:flex;align-items:center;gap:10px;
  padding:0 6px 20px;
  border-bottom:1px solid rgba(220,231,225,.13);
}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-text{
  font-family:var(--serif);
  font-weight:700;
  font-size:16px;
  letter-spacing:.02em;
  color:#F5F2EB;
  line-height:1.3;
}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:22px;}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:44px;
  padding:10px 12px;
  border-radius:9px;
  color:#C2CEC8;
  font-size:14.5px;
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.side-link:hover{background:rgba(220,231,225,.08);color:#F5F2EB;}
.side-link.is-active{background:rgba(220,231,225,.11);color:#FFFFFF;}
.side-link.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--copper);
}
.side-num{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--copper-2);
  min-width:18px;
}
.side-dot{
  width:8px;height:8px;border-radius:2px;
  background:var(--copper-2);flex:0 0 auto;
}
.side-link.is-active .side-dot{background:var(--copper);}
.side-label{white-space:nowrap;}

.side-cta{
  display:flex;align-items:center;justify-content:center;
  min-height:46px;
  margin-top:26px;
  padding:12px 16px;
  border-radius:var(--r-btn);
  background:var(--ink);
  color:#F5F2EB;
  font-size:14.5px;
  font-weight:600;
  transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.side-cta:hover{background:var(--copper);transform:translateY(-1px);}

.side-contact{
  margin-top:16px;
  padding:14px;
  border-radius:10px;
  background:rgba(220,231,225,.06);
  border:1px solid rgba(220,231,225,.10);
  font-size:13px;
  line-height:1.7;
  color:#A9B7B1;
}
.side-contact strong{display:block;color:#E7EDE9;font-size:13.5px;margin-bottom:4px;font-weight:600;}

.side-foot{margin-top:auto;padding-top:22px;border-top:1px solid rgba(220,231,225,.13);}
.side-foot-copy{font-size:12px;color:#7F8C87;line-height:1.65;margin-bottom:10px;}
.to-top{
  display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:8px 10px;
  background:none;border:1px solid rgba(220,231,225,.2);
  border-radius:9px;color:#C2CEC8;font-size:12.5px;cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.to-top:hover{color:#F5F2EB;border-color:var(--copper-2);}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobile-bar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  background:var(--dark);
  align-items:center;justify-content:space-between;
  padding:0 14px;
  z-index:55;
}
.mobile-brand{display:flex;align-items:center;gap:8px;color:#F5F2EB;}
.mobile-brand-text{font-family:var(--serif);font-weight:700;font-size:15px;}
.burger{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(220,231,225,.08);border:1px solid rgba(220,231,225,.16);
  border-radius:10px;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:#E7EDE9;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#E7EDE9;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer-mask{display:none;}

/* ---------- 主内容区 ---------- */
.app-main{margin-left:var(--side-w);min-height:100vh;}

/* ---------- 通用排版 ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--text-2);
  text-transform:uppercase;
  margin:0 0 14px;
}
.sec{padding:96px 0;}
.sec-tight{padding:72px 0;}
.sec-alt{background:var(--card);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{
  font-size:clamp(1.5rem,2.4vw,2rem);
  line-height:1.3;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.sec-head p{color:var(--text-2);font-size:16px;margin:0;}
.rule{height:1px;background:var(--line);border:0;margin:0;}
.kw{color:var(--copper);}

/* ---------- 面包屑 ---------- */
.crumb{padding:26px 0 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li::after{content:"›";color:var(--text-3);}
.crumb li:last-child::after{display:none;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--copper);}
.crumb .current{color:var(--text);font-weight:600;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;
  padding:13px 26px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  font-size:15.5px;
  font-weight:600;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn .arw{display:inline-block;transition:transform .22s var(--ease);}
.btn:hover .arw{transform:translateX(3px);}
.btn-primary{background:var(--ink);color:#FAF8F4;}
.btn-primary:hover{background:var(--copper);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--mist);}
.btn-light{background:#F5F2EB;color:var(--ink);}
.btn-light:hover{background:var(--copper);color:#FFFFFF;}
.link-line{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.link-line:hover{color:var(--copper);border-color:var(--copper);}

.badge{
  display:inline-flex;align-items:center;
  padding:3px 11px;border-radius:999px;
  background:var(--mist);color:var(--ink-2);
  font-size:12px;letter-spacing:.04em;
}

/* ---------- Hero（分类页4：左窄题 + 右大图） ---------- */
.cat-hero{padding:44px 0 88px;}
.hero-grid{align-items:center;}
.hero-left{padding-right:8px;}
.hero-title{
  font-size:clamp(1.9rem,3.4vw,2.9rem);
  line-height:1.18;
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.hero-sub{
  color:var(--text-2);
  font-size:16.5px;
  max-width:34ch;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;color:var(--text-2);}
.hero-meta li{display:flex;align-items:center;gap:8px;}
.hero-meta li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--copper);}
.hero-figure{
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--card);
  box-shadow:var(--sh-1);
}
.hero-figure img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
}
.hero-figure figcaption{
  padding:12px 16px;
  font-size:12.5px;
  color:var(--text-2);
  background:#FFFFFF;
  border-top:1px solid var(--line);
}

/* ---------- 数据条 ---------- */
.stat-bar{background:var(--dark);color:#E7EDE9;padding:52px 0;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:6px 24px;border-left:1px solid rgba(220,231,225,.16);}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:var(--mono);
  font-size:clamp(2rem,4vw,3.25rem);
  line-height:1;
  color:var(--copper-2);
  letter-spacing:-.02em;
}
.stat-unit{font-family:var(--mono);font-size:14px;color:var(--copper-2);margin-left:6px;}
.stat-label{margin-top:10px;font-size:13.5px;color:#B4C1BB;line-height:1.6;}
.stat-note{margin-top:28px;font-size:12.5px;color:#889590;}

/* ---------- 手风琴 ---------- */
.acc{border-bottom:1px solid var(--line);}
.acc-item{border-top:1px solid var(--line);}
.acc-btn{
  width:100%;
  min-height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;
  background:none;border:0;text-align:left;
  font-family:var(--serif);
  font-size:17px;font-weight:700;color:var(--text);
  cursor:pointer;
  transition:color .2s var(--ease);
}
.acc-btn:hover{color:var(--copper);}
.acc-idx{
  font-family:var(--mono);font-size:12px;color:var(--copper);
  margin-right:12px;letter-spacing:.06em;
}
.acc-head{display:flex;align-items:baseline;}
.acc-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .3s var(--ease);
}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;background:var(--ink);border-radius:1px;
}
.acc-icon::before{left:0;top:10px;width:22px;height:2px;}
.acc-icon::after{left:10px;top:0;width:2px;height:22px;transition:transform .3s var(--ease);}
.acc-item.is-open .acc-icon{transform:rotate(90deg);}
.acc-item.is-open .acc-icon::after{transform:scaleY(0);}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .34s var(--ease);}
.acc-body{padding:0 0 24px;color:var(--text-2);font-size:15.5px;max-width:70ch;}
.acc-body p:last-child{margin-bottom:0;}

/* ---------- 场景卡 ---------- */
.card{
  height:100%;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
  position:relative;
}
.card::before{
  content:"";position:absolute;top:0;left:50%;right:50%;height:2px;
  background:var(--copper);
  transition:left .3s var(--ease),right .3s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.card:hover::before{left:0;right:0;}
.card-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--card);}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:1.15rem;margin-bottom:10px;line-height:1.45;}
.card-body p{color:var(--text-2);font-size:14.5px;margin-bottom:16px;}
.card-list{margin-bottom:18px;}
.card-list li{
  position:relative;padding-left:16px;
  font-size:14px;color:var(--text-2);line-height:1.85;
}
.card-list li::before{
  content:"";position:absolute;left:0;top:.68em;
  width:6px;height:6px;border-radius:1px;background:var(--copper);
}
.card-body .link-line{margin-top:auto;align-self:flex-start;}

/* ---------- 流程步骤 ---------- */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.steps::before{
  content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;background:var(--line);
}
.step{position:relative;padding-top:0;}
.step-num{
  position:relative;z-index:1;
  width:52px;height:52px;border-radius:50%;
  background:var(--bg);
  border:1.5px solid var(--ink);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;color:var(--ink);
  margin-bottom:18px;
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.step:hover .step-num{background:var(--ink);color:#F5F2EB;border-color:var(--ink);}
.step h3{font-size:1.05rem;margin-bottom:8px;}
.step p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ---------- 左右对照块 ---------- */
.pair{
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px 28px;
  height:100%;
  box-shadow:var(--sh-1);
}
.pair h3{
  font-size:1.15rem;
  margin-bottom:6px;
}
.pair .pair-sub{font-size:13.5px;color:var(--text-3);margin-bottom:20px;}
.pair ul li{
  position:relative;
  padding:12px 0 12px 24px;
  border-top:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);line-height:1.8;
}
.pair ul li:first-child{border-top:0;}
.pair ul li::before{
  content:"";position:absolute;left:0;top:22px;
  width:8px;height:8px;border-radius:2px;
  background:var(--mist);border:1.5px solid var(--ink-2);
}
.pair.accent{border-top:2px solid var(--copper);}
.pair.accent ul li::before{background:var(--copper-2);border-color:var(--copper);}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;min-height:60px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--copper);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a p{padding:0 0 20px;margin:0;color:var(--text-2);font-size:15px;max-width:72ch;}
.faq-q .chev{
  flex:0 0 auto;width:20px;height:20px;position:relative;
  transition:transform .3s var(--ease);
}
.faq-q .chev::before,.faq-q .chev::after{
  content:"";position:absolute;background:var(--ink-2);border-radius:1px;
}
.faq-q .chev::before{left:2px;top:9px;width:16px;height:2px;}
.faq-q .chev::after{left:9px;top:2px;width:2px;height:16px;transition:transform .3s var(--ease);}
.faq-item.is-open .chev{transform:rotate(90deg);}
.faq-item.is-open .chev::after{transform:scaleY(0);}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--dark);
  color:#E7EDE9;
  border-top:2px solid var(--copper);
  padding:80px 0;
}
.cta-band h2{
  color:#F7F4EE;
  font-size:clamp(1.5rem,2.4vw,2.1rem);
  line-height:1.3;
  margin-bottom:14px;
}
.cta-band p{color:#B4C1BB;font-size:16px;max-width:60ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta-note{
  margin-top:28px;padding:18px 20px;
  border:1px solid rgba(220,231,225,.16);
  border-radius:var(--r-card);
  background:rgba(220,231,225,.05);
  font-size:14px;color:#B4C1BB;line-height:1.85;
}
.cta-note strong{color:#F0EDE6;font-weight:600;}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--dark);
  color:#C9D4CF;
  border-top:2px solid var(--copper);
  padding:64px 0 30px;
  font-size:14px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:36px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-desc{color:#96A39E;font-size:13.5px;line-height:1.8;max-width:34ch;margin:0;}
.foot-col h4{
  font-family:var(--sans);
  font-size:13px;font-weight:600;letter-spacing:.1em;
  color:#E7EDE9;margin-bottom:14px;
}
.foot-col ul li{margin-bottom:10px;}
.foot-col a{color:#C9D4CF;font-size:13.5px;transition:color .2s var(--ease);}
.foot-col a:hover{color:var(--copper-2);}
.foot-info{color:#96A39E;font-size:13.5px;line-height:1.8;margin:0;}
.foot-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(220,231,225,.13);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:#7F8C87;
}

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

/* ---------- 响应式 ---------- */
@media screen and (max-width:1279px){
  .foot-grid{grid-template-columns:1.3fr 1fr 1fr;gap:30px;}
  .foot-grid > div:last-child{grid-column:1 / -1;}
}

@media screen and (max-width:1023px){
  :root{--side-w:76px;}
  .side-shell{padding:22px 12px 18px;align-items:center;}
  .side-brand{padding:0 0 18px;justify-content:center;}
  .side-label{display:none;}
  .side-num{display:none;}
  .side-link{justify-content:center;padding:12px;width:52px;}
  .side-cta{padding:12px;width:52px;}
  .side-cta .cta-text{display:none;}
  .side-contact{display:none;}
  .side-foot-copy{display:none;}
  .side-foot{padding-top:16px;}
  .side-link::after{
    content:attr(data-label);
    position:absolute;left:calc(100% + 12px);top:50%;
    transform:translateY(-50%) translateX(-6px);
    background:var(--dark);color:#F2EFE8;
    font-size:13px;white-space:nowrap;
    padding:7px 11px;border-radius:8px;
    border:1px solid rgba(220,231,225,.18);
    opacity:0;pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease);
    z-index:80;
  }
  .side-link:hover::after{opacity:1;transform:translateY(-50%) translateX(0);}

  .sec{padding:72px 0;}
  .cat-hero{padding:36px 0 64px;}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 24px;}
  .steps::before{display:none;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:28px 0;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
}

@media screen and (max-width:767px){
  .mobile-bar{display:flex;}
  .app-main{margin-left:0;padding-top:60px;}
  .side-shell{
    width:280px;
    align-items:stretch;
    padding:24px 18px 20px;
    transform:translateX(-100%);
    transition:transform .3s var(--ease);
    overflow-y:auto;
  }
  .side-shell.is-open{transform:translateX(0);box-shadow:0 0 44px rgba(0,0,0,.4);}
  .side-brand{justify-content:flex-start;padding:0 6px 20px;}
  .side-label,.side-num,.side-contact,.side-foot-copy{display:block;}
  .side-link{justify-content:flex-start;width:100%;padding:10px 12px;}
  .side-cta{width:100%;}
  .side-cta .cta-text{display:inline;}
  .side-link::after{display:none;}
  .drawer-mask{
    display:block;position:fixed;inset:0;
    background:rgba(14,26,23,.5);
    opacity:0;pointer-events:none;
    transition:opacity .25s var(--ease);
    z-index:45;
  }
  .drawer-mask.is-on{opacity:1;pointer-events:auto;}

  body{font-size:16px;}
  .sec{padding:56px 0;}
  .sec-tight{padding:48px 0;}
  .grid-container{padding-left:18px;padding-right:18px;}
  .grid-x{margin-left:-9px;margin-right:-9px;}
  .grid-x > .cell{padding-left:9px;padding-right:9px;}

  .cat-hero{padding:28px 0 52px;}
  .hero-title{font-size:clamp(1.75rem,7vw,2.2rem);}
  .hero-sub{font-size:15.5px;max-width:none;}
  .hero-actions .btn{width:100%;}
  .hero-figure{margin-top:32px;}

  .stat-bar{padding:40px 0;}
  .stat-grid{grid-template-columns:1fr;gap:24px;}
  .stat-item{padding:0;border-left:0;border-top:1px solid rgba(220,231,225,.16);padding-top:20px;}
  .stat-item:first-child{border-top:0;padding-top:0;}

  .steps{grid-template-columns:1fr;gap:26px;}
  .acc-btn{font-size:15.5px;gap:12px;}
  .faq-q{font-size:15px;}
  .cta-band{padding:56px 0;}
  .cta-actions .btn{width:100%;}
  .foot-grid{grid-template-columns:1fr;gap:26px;}
  .foot-bottom{flex-direction:column;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
}