/* roulang page: index */
:root{
  --ink:#16221F;
  --ink-soft:#5C635F;
  --line:#E3DED4;
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --tint:#EFEBE3;
  --accent:#D9682E;
  --accent-dark:#C25A26;
  --success:#3F7A5E;
  --warn:#B4552E;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-block:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shell:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid rgba(217,104,46,.55);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1024px){.container{padding:0 40px}}

/* ============ 左侧 App Shell ============ */
.shell-nav{
  display:none;
  position:fixed;left:0;top:0;bottom:0;width:var(--shell);
  background:#fff;border-right:1px solid var(--line);
  flex-direction:column;align-items:center;
  padding:22px 0 18px;z-index:60;
}
.shell-logo{display:flex;flex-direction:column;align-items:center;gap:8px}
.logo-mark{
  width:38px;height:38px;border-radius:9px;background:var(--ink);
  color:#F2EFE8;display:grid;place-items:center;font-size:16px;font-weight:700;
  letter-spacing:0;
}
.logo-text{
  font-size:11px;line-height:1.3;font-weight:600;color:var(--ink);
  text-align:center;letter-spacing:.02em;
}
.shell-links{margin-top:38px;display:flex;flex-direction:column;gap:22px;width:100%;align-items:center}
.shell-link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:5px;
  width:100%;padding:6px 2px;color:var(--ink-soft);
  transition:color .2s var(--ease);
}
.shell-link i{font-size:17px;line-height:1}
.shell-link span{font-size:10px;line-height:1.25;text-align:center;max-width:78px;font-weight:500}
.shell-link::before{
  content:"";position:absolute;left:-1px;top:50%;transform:translateY(-50%) scaleY(0);
  width:2px;height:26px;background:var(--accent);border-radius:2px;
  transition:transform .2s var(--ease);
}
.shell-link:hover{color:var(--ink)}
.shell-link.active{color:var(--ink);font-weight:600}
.shell-link.active::before{transform:translateY(-50%) scaleY(1)}
.shell-foot{
  margin-top:auto;display:flex;align-items:center;gap:6px;
  font-size:10px;color:var(--ink-soft);font-variant-numeric:tabular-nums;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--success);display:inline-block}

/* ============ 移动端栏 ============ */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:56px;background:#fff;
  border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;padding:0 18px;z-index:70;
}
.mobile-logo{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;letter-spacing:.01em}
.mobile-logo .logo-mark{width:28px;height:28px;font-size:13px;border-radius:7px}
.burger{
  width:44px;height:44px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:10px;color:var(--ink);
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,34,31,.42);opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease);z-index:80;
}
.drawer-mask.on{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;background:var(--bg);
  transform:translateX(-102%);transition:transform .28s var(--ease);z-index:90;
  display:flex;flex-direction:column;padding:20px 18px;overflow-y:auto;
}
.drawer.on{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px}
.drawer-list a{
  display:flex;align-items:center;gap:12px;height:52px;font-size:14px;
  border-bottom:1px solid var(--line);color:var(--ink-soft);
}
.drawer-list a i{width:18px;text-align:center;font-size:15px}
.drawer-list a.active{color:var(--ink);font-weight:600}
.drawer-cta{margin-top:auto;padding-top:20px}
.drawer-cta .btn-primary{width:100%}

.sticky-dl{
  position:fixed;left:0;right:0;bottom:0;z-index:65;background:#fff;
  border-top:1px solid var(--line);padding:10px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.sticky-dl .sd-text{font-size:12px;color:var(--ink-soft);line-height:1.4}
.sticky-dl .sd-text strong{display:block;font-size:13px;color:var(--ink)}
.sticky-dl .btn-primary{height:44px;padding:0 20px;font-size:14px}

.page-main{padding-top:56px;padding-bottom:80px}

@media (min-width:1024px){
  .shell-nav{display:flex}
  .mobile-bar{display:none}
  .drawer,.drawer-mask{display:none}
  .sticky-dl{display:none}
  .page-main{padding-left:var(--shell);padding-top:0;padding-bottom:0}
}

/* ============ 通用组件 ============ */
.sec{padding:64px 0}
@media (min-width:640px){.sec{padding:80px 0}}
@media (min-width:1024px){.sec{padding:104px 0}}
.sec-tight{padding:56px 0}
.sec-line{border-top:1px solid var(--line)}

.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--accent);background:var(--tint);border-radius:6px;padding:4px 10px;
}
.badge{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  border-radius:6px;padding:3px 9px;background:var(--tint);color:var(--accent);
}
.badge-ink{background:#EDEAE2;color:var(--ink)}

h2.sec-title{font-size:clamp(26px,3vw,40px);line-height:1.2;font-weight:700;letter-spacing:-.015em}
.sec-sub{margin-top:12px;font-size:15px;line-height:1.8;color:var(--ink-soft);max-width:640px}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:32px;flex-wrap:wrap;
}
.text-link{
  position:relative;font-size:14px;font-weight:600;color:var(--ink);
  padding-bottom:3px;border-bottom:1px solid var(--ink);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  display:inline-flex;align-items:center;gap:6px;
}
.text-link:hover{color:var(--accent);border-color:var(--accent);transform:translateX(2px)}

.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  background:var(--accent);color:#fff;font-size:16px;font-weight:600;
  transition:background .2s var(--ease),transform .12s var(--ease);
}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--r-btn);
  background:#fff;border:1px solid rgba(22,34,31,.3);color:var(--ink);
  font-size:16px;font-weight:600;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease);
}
.btn-ghost:hover{background:var(--tint);border-color:var(--ink)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{height:44px;padding:0 20px;font-size:14px}

/* ============ Hero ============ */
.hero{padding:36px 0 56px}
@media (min-width:1024px){.hero{padding:72px 0 96px}}
.hero-grid{display:grid;gap:44px;align-items:center}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:5fr 7fr;gap:56px}
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.06em;color:var(--ink);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:6px 14px;
}
.hero-badge .dot{background:var(--accent)}
h1.hero-title{
  margin-top:22px;
  font-size:clamp(34px,4.4vw,60px);
  line-height:1.12;font-weight:700;letter-spacing:-.02em;
}
h1.hero-title .line-2{display:block;color:var(--ink-soft);font-size:.62em;margin-top:10px;letter-spacing:-.01em}
.hero-lead{
  margin-top:22px;font-size:17px;line-height:1.85;color:var(--ink-soft);max-width:520px;
}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{
  margin-top:38px;padding-top:24px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.hero-stats strong{
  display:block;font-size:clamp(20px,2.4vw,28px);line-height:1.2;font-weight:700;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.hero-stats span{display:block;margin-top:4px;font-size:12px;color:var(--ink-soft);letter-spacing:.04em}

.hero-visual{position:relative;padding:0 12px 12px 0}
.hero-frame{
  position:absolute;inset:12px 0 0 12px;border:1px solid var(--accent);
  border-radius:var(--r-block);pointer-events:none;
}
.hero-img{
  position:relative;border-radius:var(--r-block);width:100%;
  aspect-ratio:16/11;object-fit:cover;background:var(--tint);
}

/* ============ 价值三要点 ============ */
.value-grid{display:grid;gap:28px}
@media (min-width:768px){
  .value-grid{grid-template-columns:repeat(3,1fr);gap:0}
  .value-item{padding:0 32px;border-left:1px solid var(--line)}
  .value-item:first-child{padding-left:0;border-left:0}
  .value-item:last-child{padding-right:0}
}
.value-item i{font-size:26px;color:var(--accent)}
.value-item h3{margin-top:14px;font-size:18px;font-weight:600;letter-spacing:-.01em}
.value-item p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-soft)}

/* ============ 截图轮播 ============ */
.shots-track{display:flex;gap:20px;align-items:center;justify-content:center}
.shot{
  flex:0 0 28%;background:var(--tint);border-radius:var(--r-img);
  overflow:hidden;opacity:.6;transform:scale(.94);
  transition:flex-basis .32s var(--ease),opacity .32s var(--ease),transform .32s var(--ease);
}
.shot.is-active{flex-basis:38%;opacity:1;transform:scale(1);background:#fff;border:1px solid var(--line)}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot figcaption{
  font-size:12px;line-height:1.6;color:var(--ink-soft);padding:10px 14px 12px;
  border-top:1px solid var(--line);background:#fff;
}
.shot.is-active figcaption{color:var(--ink);font-weight:500}
.shots-ctrl{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:28px}
.arrow-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  background:#fff;display:grid;place-items:center;color:var(--ink);
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .12s var(--ease);
}
.arrow-btn:hover{border-color:var(--ink);background:var(--tint)}
.arrow-btn:active{transform:scale(.94)}
.dots{display:flex;gap:8px}
.dot-btn{
  width:8px;height:8px;border-radius:50%;background:var(--line);
  transition:background .2s var(--ease),width .2s var(--ease);
}
.dot-btn.on{background:var(--accent);width:22px;border-radius:4px}
.shot-notes{
  margin-top:32px;display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:center;
}
.shot-notes li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-soft)}
.shot-notes li::before{content:"";width:8px;height:8px;background:var(--accent);border-radius:2px;flex:none}

/* ============ 系统要求 ============ */
.req-grid{display:grid;gap:36px}
@media (min-width:768px){.req-grid{grid-template-columns:1fr 1fr;gap:56px}}
.req-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.req-head h3{font-size:18px;font-weight:600}
.req-head em{font-style:normal;font-size:12px;color:var(--ink-soft);letter-spacing:.06em}
.req-list{margin-top:14px}
.req-row{
  display:grid;grid-template-columns:110px 1fr;gap:16px;align-items:baseline;
  padding:12px 0;border-top:1px solid var(--line);font-size:14px;
}
.req-row:last-child{border-bottom:1px solid var(--line)}
.req-row dt{color:var(--ink-soft);text-align:right;font-size:13px;letter-spacing:.02em}
.req-row dd{margin:0;font-variant-numeric:tabular-nums;color:var(--ink)}

/* ============ 评价墙 ============ */
.walls{column-count:1;column-gap:24px}
@media (min-width:640px){.walls{column-count:2}}
@media (min-width:1024px){.walls{column-count:3}}
.wall-card{
  break-inside:avoid;margin-bottom:24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.wall-card:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.45);box-shadow:0 18px 40px -24px rgba(22,34,31,.28)}
.wall-top{display:flex;align-items:center;gap:10px}
.avatar{
  width:32px;height:32px;border-radius:50%;background:var(--tint);color:var(--ink);
  display:grid;place-items:center;font-size:13px;font-weight:600;flex:none;
}
.wall-name{font-size:13px;font-weight:600}
.wall-meta{font-size:12px;color:var(--ink-soft);line-height:1.4}
.wall-card p{margin-top:14px;font-size:15px;line-height:1.75}
.score{display:flex;gap:4px;margin-top:14px}
.score i{width:6px;height:6px;background:var(--accent);border-radius:1px;display:block}
.score i.off{background:var(--line)}

/* ============ 资讯卡片 ============ */
.news-grid{display:grid;gap:24px}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.45);box-shadow:0 18px 40px -24px rgba(22,34,31,.28)}
.news-card .badge{align-self:flex-start}
.news-title{
  margin-top:14px;font-size:18px;line-height:1.5;font-weight:600;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-desc{
  margin-top:10px;font-size:14px;line-height:1.7;color:var(--ink-soft);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-soft);font-variant-numeric:tabular-nums;
}
.news-foot .go{color:var(--ink);transition:transform .2s var(--ease),color .2s var(--ease)}
.news-card:hover .news-foot .go{transform:translateX(3px);color:var(--accent)}
.news-empty{
  grid-column:1/-1;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:36px 24px;text-align:center;color:var(--ink-soft);font-size:14px;
}
.news-empty a{display:inline-block;margin-top:10px;color:var(--ink);border-bottom:1px solid var(--ink)}

/* ============ FAQ ============ */
.faq-list{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;
  padding:20px 0;text-align:left;font-size:17px;font-weight:600;line-height:1.55;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent)}
.faq-icon{
  font-style:normal;font-size:20px;line-height:1;color:var(--ink-soft);flex:none;
  transition:transform .32s var(--ease),color .32s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s var(--ease)}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 0 20px;font-size:15px;line-height:1.8;color:var(--ink-soft);max-width:760px}

/* ============ CTA ============ */
.cta-block{
  background:var(--tint);border-radius:var(--r-block);
  padding:40px 28px;display:grid;gap:28px;align-items:center;
}
@media (min-width:768px){
  .cta-block{grid-template-columns:1fr auto;padding:64px;gap:40px}
}
.cta-block h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.015em}
.cta-meta{
  margin-top:14px;display:flex;flex-wrap:wrap;gap:8px 22px;
  font-size:13px;color:var(--ink-soft);font-variant-numeric:tabular-nums;
}
.cta-meta span{display:inline-flex;align-items:center;gap:6px}
.cta-meta strong{color:var(--ink);font-weight:600}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:767px){
  .cta-actions{flex-direction:column}
  .cta-actions .btn-primary,.cta-actions .btn-ghost{width:100%}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#C9C4B8;border-top:1px solid #253430;margin-top:64px}
.site-footer .container{padding-top:56px;padding-bottom:28px}
.footer-grid{display:grid;gap:36px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-logo{display:flex;align-items:center;gap:10px;color:#F2EFE8;font-size:16px;font-weight:700}
.footer-logo .logo-mark{background:#F2EFE8;color:var(--ink)}
.footer-tag{margin-top:16px;font-size:13px;line-height:1.8;color:#9FA79F;max-width:280px}
.footer-ver{margin-top:16px;font-size:12px;color:#8E968E;font-variant-numeric:tabular-nums}
.footer-col h4{font-size:13px;font-weight:600;color:#F2EFE8;letter-spacing:.06em;margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a,.footer-col span{font-size:13px;color:#C9C4B8;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid #26352F;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12px;color:#8E968E;
}

/* 揭示动效 */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* roulang page: article */
:root{
  --ink:#16221F;
  --clay:#D9682E;
  --clay-dark:#C25A26;
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --tint:#EFEBE3;
  --line:#E3DED4;
  --muted:#5C635F;
  --dark-text:#F2EFE8;
  --foot-text:#C9C4B8;
  --ok:#3F7A5E;
  --warn:#B4552E;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-lg:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shell:96px;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
::selection{background:rgba(217,104,46,.18)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ---------- 左侧 Shell 导航 ---------- */
.shell-nav{
  position:fixed;top:0;left:0;width:var(--shell);height:100vh;z-index:60;
  background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;
  padding:22px 0 20px;
}
.shell-logo{display:flex;flex-direction:column;align-items:center;gap:10px}
.logo-mark{
  width:38px;height:38px;border-radius:10px;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;line-height:1;
}
.logo-text{font-size:11px;line-height:1.35;text-align:center;font-weight:600;letter-spacing:.04em;color:var(--ink)}
.shell-links{width:100%;display:flex;flex-direction:column;align-items:center;gap:22px;margin-top:38px}
.shell-links li{width:100%;display:flex;justify-content:center}
.shell-link{
  position:relative;width:66px;display:flex;flex-direction:column;align-items:center;gap:5px;
  font-size:10px;line-height:1.3;color:var(--muted);padding:3px 0;
  transition:color .2s var(--ease);
}
.shell-link i{font-size:18px;line-height:1}
.shell-link:hover{color:var(--ink)}
.shell-link.active{color:var(--ink);font-weight:600}
.shell-link.active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:2px;height:26px;background:var(--clay);border-radius:2px;
}
.shell-foot{
  margin-top:auto;font-size:10px;color:var(--muted);display:flex;align-items:center;gap:6px;
  writing-mode:horizontal-tb;letter-spacing:.02em;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}

/* ---------- 移动端顶栏 / 抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:var(--card);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;
}
.topbar-brand{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600}
.topbar-brand .logo-mark{width:30px;height:30px;border-radius:8px;font-size:14px}
.hamburger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:10px;color:var(--ink);font-size:18px;
  transition:background .2s var(--ease);
}
.hamburger:hover{background:var(--tint)}
.mask{
  position:fixed;inset:0;background:rgba(22,34,31,.4);z-index:80;
  opacity:0;pointer-events:none;transition:opacity .25s var(--ease);
}
.mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;left:0;width:78%;max-width:330px;height:100vh;z-index:90;
  background:var(--bg);display:flex;flex-direction:column;padding:22px 20px 26px;
  transform:translateX(-101%);transition:transform .3s var(--ease);
  border-right:1px solid var(--line);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;line-height:1.3}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--muted);border-radius:10px}
.drawer-close:hover{background:var(--tint);color:var(--ink)}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  height:52px;display:flex;align-items:center;gap:12px;font-size:14px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a i{width:18px;text-align:center;color:var(--muted);font-size:15px}
.drawer-nav a.active{color:var(--clay);font-weight:600}
.drawer-nav a.active i{color:var(--clay)}
.drawer-cta{margin-top:auto;padding-top:22px}
.drawer-cta .btn{width:100%}

/* ---------- 主体 ---------- */
.main-wrap{padding-left:var(--shell);min-height:100vh;display:flex;flex-direction:column}
.page-main{flex:1 1 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--clay);color:#fff}
.btn-primary:hover{background:var(--clay-dark);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.985)}
.btn-primary:focus-visible{outline:2px solid rgba(217,104,46,.4);outline-offset:2px}
.btn-ghost{background:var(--card);color:var(--ink);border:1px solid rgba(22,34,31,.3)}
.btn-ghost:hover{background:var(--tint);border-color:var(--ink)}
.btn-ghost:focus-visible{outline:2px solid rgba(217,104,46,.4);outline-offset:2px}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.text-link:hover{color:var(--clay);border-color:var(--clay);transform:translateX(2px)}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:6px;background:var(--tint);color:var(--clay);
  font-size:12px;font-weight:600;letter-spacing:.1em;line-height:1.4;
}
.badge-ink{background:var(--tint);color:var(--ink)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);padding:30px 0 0;
}
.crumbs a{transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--clay)}
.crumbs .sep{color:var(--line)}
.crumbs .current{color:var(--ink);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.article-hero{padding:22px 0 34px;border-bottom:1px solid var(--line)}
.article-hero h1{
  font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.24;letter-spacing:-.01em;
  margin-top:18px;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;
  margin-top:22px;font-size:13px;color:var(--muted);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta i{font-size:12px;color:var(--clay)}
.copy-btn{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 14px;
  border:1px solid var(--line);border-radius:8px;background:var(--card);
  font-size:13px;color:var(--muted);transition:all .2s var(--ease);
}
.copy-btn:hover{border-color:var(--ink);color:var(--ink)}
.copy-btn:focus-visible{outline:2px solid rgba(217,104,46,.4);outline-offset:2px}
.copy-btn.done{color:var(--ok);border-color:var(--ok)}

/* ---------- 文章布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 268px;
  gap:64px;padding:44px 0 76px;align-items:start;
}
.article-body{
  max-width:760px;font-size:17px;line-height:1.85;color:#22302C;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;font-size:clamp(21px,2.2vw,27px);font-weight:700;line-height:1.35;
  margin:44px 0 16px;padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;width:3px;height:1.05em;
  background:var(--clay);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.45;margin:32px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.35em}
.article-body ul li{list-style:disc;margin-bottom:.5em}
.article-body ol li{list-style:decimal;margin-bottom:.5em}
.article-body li::marker{color:var(--clay)}
.article-body a{color:var(--clay);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--clay-dark)}
.article-body img{border-radius:var(--r-img);margin:26px 0}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;background:var(--card);
  border-left:3px solid var(--clay);border-radius:0 10px 10px 0;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.9em;background:var(--tint);padding:2px 6px;border-radius:6px;
}
.article-body pre{
  background:var(--ink);color:var(--dark-text);padding:18px 20px;border-radius:var(--r-img);
  overflow-x:auto;margin:24px 0;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{font-weight:600;color:var(--ink);background:var(--tint)}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:24px;display:flex;flex-direction:column;gap:20px}
.aside-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;
}
.aside-card h3{
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--muted);
  text-transform:none;margin-bottom:14px;
}
.aside-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:9px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.aside-list li:last-child{border-bottom:0;padding-bottom:0}
.aside-list .k{color:var(--muted);font-size:13px;flex:0 0 auto}
.aside-list .v{color:var(--ink);font-weight:600;text-align:right;word-break:break-all}
.aside-links li{padding:0}
.aside-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink);
  transition:color .2s var(--ease);
}
.aside-links li:last-child a{border-bottom:0;padding-bottom:0}
.aside-links a i{font-size:11px;color:var(--muted);transition:transform .2s var(--ease),color .2s var(--ease)}
.aside-links a:hover{color:var(--clay)}
.aside-links a:hover i{transform:translateX(3px);color:var(--clay)}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:620px;background:var(--card);border:1px dashed var(--line);
  border-radius:var(--r-card);padding:44px 32px;text-align:center;
}
.empty-state i{font-size:26px;color:var(--clay);margin-bottom:14px;display:block}
.empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--muted);line-height:1.8;margin-bottom:24px}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 96px}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:36px;
}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-head p{font-size:14px;color:var(--muted);margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rcard{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rcard:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.35);box-shadow:0 18px 40px -24px rgba(22,34,31,.28)}
.rcard-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--tint)}
.rcard-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.rcard:hover .rcard-thumb img{transform:scale(1.03)}
.rcard-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard-body .badge{align-self:flex-start}
.rcard-title{font-size:18px;font-weight:600;line-height:1.45}
.rcard-desc{font-size:14px;line-height:1.7;color:var(--muted)}
.rcard-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);
}
.rcard-foot i{transition:transform .2s var(--ease)}
.rcard:hover .rcard-foot i{transform:translateX(4px);color:var(--clay)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--foot-text);border-top:1px solid rgba(242,239,232,.1)}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 48px;
}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;
}
.footer-logo .logo-mark{background:rgba(255,255,255,.1);color:#fff;width:32px;height:32px;font-size:14px;border-radius:8px}
.footer-tag{font-size:13px;line-height:1.8;color:var(--foot-text);margin-top:16px;max-width:280px}
.footer-ver{font-size:12px;color:rgba(201,196,184,.65);margin-top:14px}
.footer-col h4{
  font-size:12px;letter-spacing:.12em;font-weight:600;color:#fff;margin-bottom:16px;
}
.footer-col li{font-size:13px;line-height:1.7;margin-bottom:10px;color:var(--foot-text)}
.footer-col a{transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(242,239,232,.1);padding:22px 0 26px;
  font-size:12px;color:rgba(201,196,184,.7);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:1fr;gap:44px}
  .article-aside{position:static;flex-direction:row;flex-wrap:wrap;gap:20px}
  .aside-card{flex:1 1 260px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .shell-nav{display:none}
  .topbar{display:flex}
  .main-wrap{padding-left:0;padding-top:56px}
  .container{padding:0 24px}
  .article-layout{padding:36px 0 60px}
  .related{padding-bottom:72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 40px}
}
@media (max-width:767px){
  .article-hero h1{font-size:clamp(24px,6vw,30px)}
  .article-body{font-size:16px;line-height:1.85}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .empty-state{padding:32px 22px}
  .btn{width:100%;height:48px}
  .btn-sm{width:auto}
  .article-meta{gap:10px 16px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#16221F;
  --ink-soft:#5C635F;
  --orange:#D9682E;
  --orange-dark:#C25A26;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --band:#EFEBE3;
  --line:#E3DED4;
  --ok:#3F7A5E;
  --warn:#B4552E;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-big:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-hover:0 18px 40px -24px rgba(22,34,31,.28);
  --shell-w:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.site-body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
.site-body img{display:block;max-width:100%;height:auto}
.site-body a{color:inherit;text-decoration:none}
.site-body button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
.site-body ul,.site-body ol{list-style:none;margin:0;padding:0}
.site-body h1,.site-body h2,.site-body h3,.site-body h4,.site-body p{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.app-main{padding-left:0;padding-bottom:0}
@media (min-width:1024px){
  .app-main{padding-left:var(--shell-w)}
}

/* ---------- 左侧 App Shell 导航 ---------- */
.shell-nav{
  display:none;
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--shell-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  z-index:60;
  flex-direction:column;
  align-items:center;
  padding:22px 8px 18px;
}
@media (min-width:1024px){.shell-nav{display:flex}}
.shell-logo{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  width:100%;padding-bottom:20px;border-bottom:1px solid var(--line);
}
.logo-mark{
  width:38px;height:38px;border-radius:10px;
  background:var(--ink);color:#F2EFE8;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;letter-spacing:0;
  flex:0 0 auto;
  transition:transform .2s var(--ease);
}
.shell-logo:hover .logo-mark{transform:translateY(-1px)}
.logo-text{
  font-size:11px;line-height:1.3;font-weight:600;letter-spacing:.04em;
  text-align:center;color:var(--ink);
}
.shell-links{
  display:flex;flex-direction:column;gap:22px;
  margin-top:28px;width:100%;align-items:center;
}
.shell-link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:5px;
  width:100%;padding:6px 0;
  color:var(--ink-soft);
  font-size:10px;letter-spacing:.02em;
  transition:color .2s var(--ease);
}
.shell-link i{font-size:18px;line-height:1}
.shell-link::before{
  content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);
  width:2px;height:0;background:var(--orange);
  transition:height .2s var(--ease);
}
.shell-link:hover{color:var(--ink)}
.shell-link.active{color:var(--ink);font-weight:600}
.shell-link.active::before{height:26px}
.shell-foot{
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line);
  width:100%;display:flex;flex-direction:column;align-items:center;gap:6px;
  font-size:10px;color:var(--ink-soft);letter-spacing:.04em;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobile-bar{
  position:sticky;top:0;z-index:50;
  height:56px;display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
@media (min-width:1024px){.mobile-bar{display:none}}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;letter-spacing:.02em}
.mobile-brand .logo-mark{width:30px;height:30px;border-radius:8px;font-size:14px}
.burger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;font-size:17px;color:var(--ink);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.burger:hover{border-color:var(--ink);background:var(--band)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,34,31,.4);
  opacity:0;pointer-events:none;transition:opacity .2s var(--ease);z-index:70;
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;
  background:var(--bg);z-index:80;
  transform:translateX(-100%);
  transition:transform .32s var(--ease);
  display:flex;flex-direction:column;padding:20px 18px;
  border-right:1px solid var(--line);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink-soft)}
.drawer-nav{margin-top:12px;display:flex;flex-direction:column}
.drawer-nav a{
  display:flex;align-items:center;gap:12px;
  height:52px;font-size:14px;color:var(--ink-soft);
  border-bottom:1px solid var(--line);
}
.drawer-nav a i{width:18px;font-size:15px;text-align:center}
.drawer-nav a.active{color:var(--ink);font-weight:600}
.drawer-nav a.active i{color:var(--orange)}
.drawer-cta{margin-top:auto}
.drawer-cta .btn{width:100%;justify-content:center}
@media (min-width:1024px){
  .drawer,.drawer-mask{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:scale(.985)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px)}
.btn-primary:focus-visible{outline:2px solid rgba(217,104,46,.4);outline-offset:3px}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid rgba(22,34,31,.3)}
.btn-ghost:hover{border-color:var(--ink);background:var(--band)}
.btn-ghost:focus-visible{outline:2px solid rgba(22,34,31,.25);outline-offset:3px}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.text-link:hover{color:var(--orange);border-color:var(--orange);transform:translateX(2px)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-soft);
  padding:28px 0 0;
}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--orange)}
.breadcrumb .sep{color:#B9B2A5}
.breadcrumb .current{color:var(--ink-soft)}

/* ---------- 分类 Hero ---------- */
.cat-hero{padding:26px 0 64px}
.cat-hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media (min-width:900px){
  .cat-hero-grid{grid-template-columns:1.15fr .85fr;gap:56px}
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--band);color:var(--orange);
  font-size:12px;font-weight:600;letter-spacing:.1em;
  padding:7px 12px;border-radius:6px;
}
.hero-title{
  font-size:clamp(30px,3.6vw,46px);
  font-weight:700;line-height:1.14;letter-spacing:-.02em;
  margin-top:20px;
}
.hero-sub{
  margin-top:18px;font-size:clamp(16px,1.5vw,19px);
  color:var(--ink-soft);line-height:1.75;max-width:32em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-figure{position:relative}
.hero-figure img{
  width:100%;border-radius:var(--r-img);
  border:1px solid var(--line);
  aspect-ratio:4/3;object-fit:cover;
}
.hero-figure::after{
  content:"";position:absolute;inset:12px -12px -12px 12px;
  border:1px solid var(--orange);border-radius:var(--r-img);
  pointer-events:none;z-index:-1;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 28px;
  margin-top:28px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-soft);
}
.hero-meta strong{color:var(--ink);font-size:15px;font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- 板块通用 ---------- */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:78px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-tight{padding:44px 0}
@media (min-width:1024px){.section-tight{padding:64px 0}}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;
  letter-spacing:.12em;color:var(--orange);margin-bottom:14px;
}
.h2{
  font-size:clamp(24px,2.8vw,36px);font-weight:700;line-height:1.22;
  letter-spacing:-.015em;
}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:36px}
.section-desc{margin-top:14px;font-size:15px;color:var(--ink-soft);max-width:44em}

/* ---------- 步骤时间轴 ---------- */
.split{
  display:grid;grid-template-columns:1fr;gap:40px;
}
@media (min-width:1024px){
  .split{grid-template-columns:minmax(0,1fr) 340px;gap:56px}
}
.steps{position:relative;margin-top:4px}
.steps::before{
  content:"";position:absolute;left:31px;top:14px;bottom:26px;
  width:1px;background:var(--line);
}
.step{position:relative;display:flex;gap:24px;padding-bottom:34px}
.step:last-child{padding-bottom:0}
.step-num{
  flex:0 0 64px;width:64px;
  font-size:40px;font-weight:700;line-height:1;
  color:var(--ink);letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;
  background:var(--bg);padding:2px 0;
}
.step-body h3{
  font-size:19px;font-weight:600;line-height:1.4;
  margin-bottom:8px;
}
.step-body p{font-size:15px;color:var(--ink-soft);line-height:1.8}
.step-body .step-tip{
  display:inline-flex;align-items:center;gap:7px;
  margin-top:12px;font-size:13px;color:var(--ink);
  background:var(--band);border-radius:6px;padding:6px 11px;
}
.step-body .step-tip i{font-size:11px;color:var(--orange)}
@media (max-width:520px){
  .step{gap:16px}
  .step-num{flex-basis:44px;width:44px;font-size:28px}
  .steps::before{left:21px}
}

/* ---------- 登录方式小卡 ---------- */
.ways{display:grid;grid-template-columns:1fr;gap:16px;margin-top:24px}
@media (min-width:640px){.ways{grid-template-columns:repeat(3,1fr)}}
.way{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.way:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.35);box-shadow:var(--shadow-hover)}
.way i{font-size:20px;color:var(--orange)}
.way h4{font-size:16px;font-weight:600;margin-top:12px}
.way p{font-size:13.5px;color:var(--ink-soft);line-height:1.7;margin-top:6px}

/* ---------- 右侧检查清单 ---------- */
.side-col{position:relative}
@media (min-width:1024px){
  .sticky-col{position:sticky;top:36px}
}
.panel-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;
}
.panel-card + .panel-card{margin-top:18px}
.panel-card h3{font-size:17px;font-weight:600;letter-spacing:.01em}
.panel-hint{font-size:13.5px;color:var(--ink-soft);margin-top:8px;line-height:1.7}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:2px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:11px 0;border-bottom:1px dashed var(--line);
  font-size:14px;line-height:1.65;color:var(--ink);
}
.check-list .check-item:last-child{border-bottom:0}
.check-box{
  flex:0 0 16px;width:16px;height:16px;margin-top:4px;
  border:1px solid rgba(22,34,31,.35);border-radius:4px;
  display:inline-flex;align-items:center;justify-content:center;
  color:transparent;font-size:9px;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.check-item:hover .check-box{background:var(--orange);border-color:var(--orange);color:#fff}
.panel-dark{
  background:var(--ink);color:#F2EFE8;border-color:var(--ink);
}
.panel-dark h3{color:#fff}
.panel-dark p{font-size:13.5px;color:#C9C4B8;line-height:1.8;margin-top:10px}
.panel-dark .text-link{color:#F2EFE8;border-color:rgba(242,239,232,.5);font-size:13px;margin-top:16px}
.panel-dark .text-link:hover{color:var(--orange);border-color:var(--orange)}

/* ---------- 常见拦截卡片 ---------- */
.issue-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.issue-grid{grid-template-columns:repeat(3,1fr)}}
.issue-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;display:flex;flex-direction:column;gap:10px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.issue-card:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.35);box-shadow:var(--shadow-hover)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.1em;
  background:var(--band);color:var(--orange);
  padding:5px 10px;border-radius:6px;align-self:flex-start;
}
.badge-ink{background:#E8E4DB;color:var(--ink)}
.issue-card h3{font-size:18px;font-weight:600;line-height:1.4}
.issue-card p{font-size:14px;color:var(--ink-soft);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;text-align:left;
  padding:22px 0;font-size:17px;font-weight:600;line-height:1.5;
  color:var(--ink);transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--orange)}
.faq-q .plus{
  flex:0 0 auto;font-size:20px;font-weight:400;color:var(--ink-soft);
  transition:transform .32s var(--ease),color .32s var(--ease);line-height:1;
}
.faq-item.open .faq-q .plus{transform:rotate(45deg);color:var(--orange)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a p{
  font-size:15px;line-height:1.85;color:var(--ink-soft);
  padding:0 0 24px;max-width:52em;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--band);border-radius:var(--r-big);
  padding:40px 26px;
  display:flex;flex-direction:column;gap:26px;
}
@media (min-width:768px){
  .cta-band{padding:56px 48px;flex-direction:row;align-items:center;justify-content:space-between;gap:40px}
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.cta-meta{
  margin-top:14px;display:flex;flex-wrap:wrap;gap:8px 22px;
  font-size:13px;color:var(--ink-soft);
}
.cta-meta span{display:inline-flex;align-items:center;gap:6px}
.cta-meta strong{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:767px){
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);color:#C9C4B8;
  border-top:1px solid rgba(242,239,232,.12);
  margin-top:0;padding:60px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:36px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15px;font-weight:700;color:#F2EFE8;letter-spacing:.01em;
}
.footer-logo .logo-mark{width:32px;height:32px;border-radius:9px;background:#F2EFE8;color:var(--ink);font-size:15px}
.footer-tag{font-size:13.5px;line-height:1.8;margin-top:16px;max-width:24em;color:#A9A498}
.footer-ver{font-size:12.5px;margin-top:14px;color:#8F8A7E;letter-spacing:.02em}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.08em;color:#F2EFE8;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li a,.footer-col li span{font-size:13px;color:#C9C4B8;line-height:1.6;transition:color .2s var(--ease)}
.footer-col li a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(242,239,232,.12);
  font-size:12.5px;color:#8F8A7E;letter-spacing:.02em;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category2 */
:root{
  --ink:#16221F;
  --ink-soft:#243430;
  --accent:#D9682E;
  --accent-dark:#C25A26;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --surface-2:#EFEBE3;
  --line:#E3DED4;
  --muted:#5C635F;
  --light:#F2EFE8;
  --ok:#3F7A5E;
  --warn:#B4552E;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow:0 18px 40px -24px rgba(22,34,31,.28);
  --shell:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border-radius:12px}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid rgba(217,104,46,.55);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.page{padding-left:var(--shell)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--accent);background:var(--surface-2);
  border-radius:6px;padding:6px 12px;
}
.eyebrow .sq{width:6px;height:6px;background:var(--accent);border-radius:1px;display:inline-block}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.sec-title{font-size:clamp(26px,3vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.02em}
.sec-desc{margin-top:12px;color:var(--muted);font-size:16px;line-height:1.8;max-width:620px}
.textlink{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:2px;transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.textlink:hover{color:var(--accent);border-color:var(--accent);transform:translateX(2px)}

/* ===== 左侧 App Shell 导航 ===== */
.shell-nav{
  position:fixed;left:0;top:0;bottom:0;width:var(--shell);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;
  padding:26px 0 20px;z-index:80;
}
.shell-logo{display:flex;flex-direction:column;align-items:center;gap:9px}
.logo-mark{
  width:42px;height:42px;border-radius:12px;background:var(--ink);color:var(--light);
  display:grid;place-items:center;font-size:18px;font-weight:700;letter-spacing:.02em;
}
.logo-text{font-size:11px;line-height:1.35;text-align:center;font-weight:600;color:var(--ink);letter-spacing:.02em}
.shell-links{margin-top:40px;width:100%;display:flex;flex-direction:column;gap:20px}
.shell-link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:7px;
  padding:6px 2px;font-size:10px;line-height:1.3;color:var(--muted);
  transition:color .2s var(--ease);
}
.shell-link i{font-size:17px}
.shell-link span{letter-spacing:.04em}
.shell-link:hover{color:var(--ink)}
.shell-link.active{color:var(--ink);font-weight:600}
.shell-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:2px;height:24px;background:var(--accent);border-radius:2px;
}
.shell-foot{
  margin-top:auto;display:flex;align-items:center;gap:6px;
  font-size:10px;color:var(--muted);letter-spacing:.04em;
}
.shell-foot .dot{width:6px;height:6px;border-radius:50%;background:var(--ok)}

/* ===== 移动端顶栏与抽屉 ===== */
.mobile-bar{
  display:none;position:sticky;top:0;z-index:90;height:56px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;
  padding:0 16px;
}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;letter-spacing:.02em}
.mobile-brand .logo-mark{width:30px;height:30px;border-radius:9px;font-size:14px}
.menu-btn{width:44px;height:44px;display:grid;place-items:center;font-size:18px;color:var(--ink);border-radius:10px}
.menu-btn:hover{background:var(--surface-2)}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;z-index:120;
  background:var(--bg);border-right:1px solid var(--line);
  transform:translateX(-102%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;padding:22px 18px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:14px;font-weight:700;letter-spacing:.04em}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;font-size:16px;color:var(--muted);border-radius:10px}
.drawer-close:hover{background:var(--surface-2);color:var(--ink)}
.drawer-links{display:flex;flex-direction:column}
.drawer-links a{
  display:flex;align-items:center;gap:12px;height:52px;font-size:14px;
  color:var(--ink-soft);border-bottom:1px solid var(--line);
}
.drawer-links a i{width:18px;text-align:center;color:var(--muted)}
.drawer-links a.active{color:var(--accent);font-weight:600}
.drawer-links a.active i{color:var(--accent)}
.drawer-cta{
  margin-top:auto;height:48px;border-radius:var(--r-sm);background:var(--accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;
}
.drawer-cta:hover{background:var(--accent-dark)}
.mask{
  position:fixed;inset:0;background:rgba(22,34,31,.42);z-index:110;
  opacity:0;pointer-events:none;transition:opacity .28s var(--ease);
}
.mask.open{opacity:1;pointer-events:auto}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:52px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  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(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid rgba(22,34,31,.3)}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface-2);transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{min-height:44px;padding:0 20px;font-size:14px;border-radius:var(--r-sm)}
.btn-block{width:100%}

/* ===== Hero ===== */
.hero{padding:56px 0 72px;border-bottom:1px solid var(--line)}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:28px;flex-wrap:wrap}
.crumb a{color:var(--muted);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:#B9B3A7}
.crumb .cur{color:var(--muted)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(34px,4.4vw,56px);font-weight:700;line-height:1.12;letter-spacing:-.02em;
  margin:20px 0 0;
}
.hero h1 em{font-style:normal;color:var(--muted)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--muted);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:38px;margin-top:38px;padding-top:26px;
  border-top:1px solid var(--line);
}
.fact-num{font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.2}
.fact-label{font-size:12px;color:var(--muted);letter-spacing:.06em;margin-top:4px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:auto;border-radius:12px;position:relative;z-index:2;
}
.hero-visual::after{
  content:"";position:absolute;inset:0;transform:translate(12px,12px);
  border:1px solid var(--accent);border-radius:12px;z-index:1;
}
.hero-visual figcaption{margin-top:16px;font-size:12px;color:var(--muted);letter-spacing:.04em}

/* ===== 版本卡 ===== */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section.alt{background:var(--surface-2)}
.version-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.version-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;display:flex;flex-direction:column;gap:18px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.version-card:hover{transform:translateY(-2px);border-color:rgba(217,104,46,.35);box-shadow:var(--shadow)}
.plat{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600}
.plat i{color:var(--accent);font-size:18px;width:20px;text-align:center}
.v-num{font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.1}
.v-num small{font-size:12px;font-weight:500;color:var(--muted);letter-spacing:.06em;margin-left:8px}
.v-meta{display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--muted);padding-top:16px;border-top:1px solid var(--line)}
.v-meta div{display:flex;justify-content:space-between;gap:10px}
.v-meta b{color:var(--ink-soft);font-weight:600}
.v-card-btn{margin-top:auto}

/* ===== 系统要求条 ===== */
.reqbar{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 28px;display:flex;flex-wrap:wrap;gap:8px 0;
}
.req-item{
  flex:1 1 180px;padding:0 24px;border-left:1px solid var(--line);
  display:flex;flex-direction:column;gap:4px;
}
.req-item:first-child{padding-left:0;border-left:0}
.req-label{font-size:12px;color:var(--muted);letter-spacing:.06em}
.req-val{font-size:16px;font-weight:600;letter-spacing:.02em}

/* ===== 流程步骤 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;position:relative}
.step{position:relative;padding-top:26px;border-top:2px solid var(--line)}
.step::before{
  content:"";position:absolute;top:-2px;left:0;width:56px;height:2px;background:var(--accent);
}
.step-num{font-size:34px;font-weight:700;letter-spacing:-.03em;line-height:1;color:var(--ink);margin-bottom:12px}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ===== 图文区块 ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split img{width:100%;border-radius:12px}
.split h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.22;letter-spacing:-.02em;margin:18px 0 16px}
.split p{color:var(--muted);font-size:16px;line-height:1.85;margin-bottom:14px}
.split .textlink{margin-top:10px}
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:24px}
.check-list li{display:flex;gap:12px;font-size:15px;color:var(--ink-soft);line-height:1.7}
.check-list i{color:var(--ok);font-size:14px;margin-top:5px}

/* ===== 更新记录 ===== */
.changelog{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.log-row{
  display:grid;grid-template-columns:120px 130px 1fr;gap:24px;align-items:baseline;
  padding:22px 28px;border-top:1px solid var(--line);transition:background .2s var(--ease);
}
.log-row:first-child{border-top:0}
.log-row:hover{background:#FBFAF6}
.log-ver{font-size:18px;font-weight:700;letter-spacing:-.01em}
.log-date{font-size:13px;color:var(--muted)}
.log-text{font-size:14px;line-height:1.75;color:var(--ink-soft)}

/* ===== FAQ ===== */
.faq{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;
  text-align:left;padding:24px 4px;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent)}
.faq-q .ico{
  flex:none;width:26px;height:26px;display:grid;place-items:center;
  font-size:16px;color:var(--muted);transition:transform .28s var(--ease),color .28s var(--ease);
}
.faq-item.open .faq-q{color:var(--ink)}
.faq-item.open .faq-q .ico{transform:rotate(45deg);color:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a p{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--muted);max-width:820px}

/* ===== CTA ===== */
.cta{
  background:var(--surface-2);border-radius:var(--r-lg);
  padding:56px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;
}
.cta h2{font-size:clamp(24px,2.8vw,34px);font-weight:700;line-height:1.22;letter-spacing:-.02em}
.cta-meta{display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:18px;font-size:13px;color:var(--muted)}
.cta-meta b{color:var(--ink);font-weight:600}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:#C9C4B8;margin-top:96px;border-top:1px solid #2A3A36}
.site-footer .container{padding-top:64px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr .8fr;gap:48px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;color:var(--light);font-size:16px;font-weight:700;letter-spacing:.02em}
.footer-logo .logo-mark{width:34px;height:34px;border-radius:10px;background:var(--light);color:var(--ink);font-size:15px}
.footer-tag{margin-top:16px;font-size:14px;line-height:1.8;color:#C9C4B8;max-width:320px}
.footer-ver{margin-top:14px;font-size:12px;color:#9A968B;letter-spacing:.04em}
.footer-col h4{font-size:13px;font-weight:600;color:var(--light);letter-spacing:.08em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:13px;color:#C9C4B8;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid #2A3A36;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:#9A968B;letter-spacing:.04em;
}

/* ===== 动效 ===== */
.fade-up{opacity:0;transform:translateY(8px);animation:fadeUp .6s var(--ease) forwards}
.fade-up.d1{animation-delay:.06s}
.fade-up.d2{animation-delay:.12s}
.fade-up.d3{animation-delay:.18s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .version-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:36px}
}
@media (max-width:1023px){
  .page{padding-left:0}
  .shell-nav{display:none}
  .mobile-bar{display:flex}
  .hero{padding:28px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:clamp(30px,6vw,42px)}
  .hero-visual::after{display:none}
  .section{padding:64px 0}
  .section.tight{padding:56px 0}
  .split{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta{grid-template-columns:1fr;padding:40px}
  .cta-actions{justify-content:flex-start}
  .log-row{grid-template-columns:100px 1fr;gap:6px 20px}
  .log-text{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid > div:first-child{grid-column:1 / -1}
  .reqbar{padding:20px;gap:18px 0}
  .req-item{flex:1 1 100%;padding:0;border-left:0}
  .req-item + .req-item{padding-top:14px;border-top:1px solid var(--line)}
}
@media (max-width:520px){
  .version-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .hero-facts{gap:24px}
  .fact{flex:1 1 40%}
  .hero-actions .btn{width:100%}
  .cta{padding:28px}
  .cta-actions .btn{width:100%}
  .log-row{grid-template-columns:1fr;padding:18px 20px}
  .footer-bottom{flex-direction:column;gap:8px}
  .faq-q{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.001s!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
    --ink:#16221F;
    --ink-soft:#2A3A35;
    --orange:#D9682E;
    --orange-deep:#C25A26;
    --bg:#F6F4EF;
    --card:#FFFFFF;
    --soft:#EFEBE3;
    --line:#E3DED4;
    --muted:#5C635F;
    --ok:#3F7A5E;
    --warn:#B4552E;
    --ft-text:#C9C4B8;
    --r-btn:10px;
    --r-card:14px;
    --r-img:12px;
    --r-block:24px;
    --ease:cubic-bezier(.2,.7,.2,1);
    --font-cn:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,sans-serif;
    --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;height:auto;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  input{font-family:inherit;font-size:inherit;color:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  :focus-visible{outline:2px solid rgba(217,104,46,.55);outline-offset:3px;border-radius:6px;}

  .container{
    width:100%;
    max-width:1200px !important;
    margin-inline:auto;
    padding-inline:clamp(20px,4vw,32px);
  }
  .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

  /* ============ 左侧 App Shell ============ */
  .shell-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:96px;
    background:#fff;
    border-right:1px solid var(--line);
    display:flex;
    flex-direction:column;
    align-items:center;
    padding:22px 0 20px;
    z-index:60;
  }
  .shell-logo{display:flex;flex-direction:column;align-items:center;gap:9px;}
  .logo-mark{
    width:38px;height:38px;border-radius:10px;
    background:var(--ink);color:#F2EFE8;
    display:grid;place-items:center;
    font-size:16px;font-weight:700;
    letter-spacing:.02em;
  }
  .logo-text{
    font-size:11px;line-height:1.3;font-weight:600;
    text-align:center;letter-spacing:.08em;color:var(--ink);
  }
  .shell-links{
    margin-top:38px;
    width:100%;
    display:flex;flex-direction:column;gap:22px;
  }
  .shell-link{
    position:relative;
    display:flex;flex-direction:column;align-items:center;gap:6px;
    padding:6px 0;
    color:var(--muted);
    font-size:10px;line-height:1.4;letter-spacing:.02em;
    transition:color .2s var(--ease);
  }
  .shell-link i{font-size:17px;}
  .shell-link:hover{color:var(--ink);}
  .shell-link.active{color:var(--ink);font-weight:600;}
  .shell-link.active::before{
    content:"";position:absolute;left:0;top:2px;bottom:2px;width:2px;
    background:var(--orange);border-radius:0 2px 2px 0;
  }
  .shell-foot{
    margin-top:auto;
    display:flex;flex-direction:column;align-items:center;gap:5px;
    font-size:10px;color:var(--muted);letter-spacing:.02em;
  }
  .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block;}

  .shell-main{padding-left:96px;min-height:100vh;}

  /* ============ 移动端顶部栏 / 抽屉 ============ */
  .mobile-bar{
    display:none;
    position:fixed;top:0;left:0;right:0;height:56px;
    background:#fff;border-bottom:1px solid var(--line);
    align-items:center;justify-content:space-between;
    padding:0 16px;z-index:70;
  }
  .mobile-logo{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700;letter-spacing:.02em;}
  .mobile-logo .logo-mark{width:30px;height:30px;border-radius:8px;font-size:13px;}
  .burger{
    width:44px;height:44px;display:grid;place-items:center;
    border:1px solid var(--line);border-radius:10px;color:var(--ink);
    transition:background .2s var(--ease),border-color .2s var(--ease);
  }
  .burger:hover{background:var(--soft);border-color:#cfc7ba;}
  .drawer-mask{
    position:fixed;inset:0;background:rgba(22,34,31,.42);
    opacity:0;pointer-events:none;transition:opacity .28s var(--ease);z-index:80;
  }
  .drawer-mask.show{opacity:1;pointer-events:auto;}
  .drawer{
    position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;
    background:var(--bg);z-index:90;
    transform:translateX(-102%);
    transition:transform .3s var(--ease);
    display:flex;flex-direction:column;
    padding:22px 20px 26px;
    border-right:1px solid var(--line);
  }
  .drawer.show{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
  .drawer-title{font-size:15px;font-weight:700;}
  .drawer-close{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);color:var(--muted);}
  .drawer-close:hover{background:var(--soft);color:var(--ink);}
  .drawer ul{display:flex;flex-direction:column;}
  .drawer li a{
    display:flex;align-items:center;gap:12px;
    height:52px;font-size:14px;color:var(--ink-soft);
    border-bottom:1px solid var(--line);
  }
  .drawer li a i{font-size:15px;color:var(--muted);width:18px;text-align:center;}
  .drawer li a.active{color:var(--ink);font-weight:700;}
  .drawer li a.active i{color:var(--orange);}
  .drawer-cta{margin-top:auto;padding-top:20px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:52px;padding:0 26px;
    border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.02em;
    transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  }
  .btn-primary{background:var(--orange);color:#fff;}
  .btn-primary:hover{background:var(--orange-deep);transform:translateY(-1px);}
  .btn-primary:active{transform:scale(.985);}
  .btn-ghost{background:#fff;color:var(--ink);border:1px solid rgba(22,34,31,.28);}
  .btn-ghost:hover{background:var(--soft);border-color:var(--ink);}
  .btn-ghost:active{transform:scale(.985);}
  .link-arrow{
    display:inline-flex;align-items:center;gap:7px;
    font-size:14px;font-weight:600;color:var(--ink);
    border-bottom:1px solid var(--ink);padding-bottom:2px;
    transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  }
  .link-arrow i{font-size:12px;transition:transform .2s var(--ease);}
  .link-arrow:hover{color:var(--orange);border-color:var(--orange);transform:translateX(2px);}
  .link-arrow:hover i{transform:translateX(2px);}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 10px;border-radius:6px;
    font-size:12px;font-weight:600;letter-spacing:.1em;
  }
  .badge-orange{background:var(--soft);color:var(--orange);}
  .badge-ink{background:var(--soft);color:var(--ink);}

  /* ============ 面包屑 ============ */
  .crumb{padding-top:34px;}
  .crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
  .crumb li{display:flex;align-items:center;gap:8px;}
  .crumb li+li::before{content:"/";color:#b9b2a5;}
  .crumb a{color:var(--muted);transition:color .2s var(--ease);}
  .crumb a:hover{color:var(--ink);}
  .crumb .current{color:var(--ink-soft);}

  /* ============ Hero ============ */
  .hero{padding:36px 0 clamp(56px,7vw,88px);}
  .hero-grid{
    display:grid;
    grid-template-columns:5fr 7fr;
    gap:clamp(28px,4vw,56px);
    align-items:center;
  }
  .hero h1{
    font-size:clamp(30px,4.2vw,54px);
    line-height:1.14;
    letter-spacing:-.02em;
    font-weight:700;
    margin-top:18px;
  }
  .hero h1 .thin{display:block;color:var(--muted);font-weight:700;}
  .hero-sub{
    margin-top:20px;
    font-size:clamp(16px,1.4vw,18px);
    line-height:1.8;
    color:var(--muted);
    max-width:38ch;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
  .hero-stats{
    display:grid;grid-template-columns:repeat(3,1fr);
    gap:18px;margin-top:38px;padding-top:26px;
    border-top:1px solid var(--line);
  }
  .hero-stats .k{
    font-family:var(--font-num);font-variant-numeric:tabular-nums;
    font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.2;color:var(--ink);
  }
  .hero-stats .l{font-size:12px;letter-spacing:.06em;color:var(--muted);margin-top:6px;}
  .hero-media{position:relative;}
  .hero-media::after{
    content:"";position:absolute;inset:14px -14px -14px 14px;
    border:1px solid var(--orange);border-radius:var(--r-img);
    pointer-events:none;
  }
  .hero-media img{
    position:relative;z-index:1;
    width:100%;border-radius:var(--r-img);
    object-fit:cover;aspect-ratio:16/11;
    background:var(--soft);
  }
  .hero-media .caption{
    position:relative;z-index:1;
    margin-top:12px;font-size:12px;color:var(--muted);letter-spacing:.04em;
  }

  /* ============ 通用板块 ============ */
  .section{padding:clamp(56px,7.5vw,104px) 0;}
  .section-soft{background:var(--soft);}
  .section-ink{background:var(--ink);color:#F2EFE8;}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(28px,3.4vw,44px);}
  .section-head h2{
    font-size:clamp(24px,3vw,38px);line-height:1.22;font-weight:700;letter-spacing:-.01em;
    max-width:22ch;
  }
  .section-head .lead{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);max-width:56ch;}
  .section-ink .section-head .lead{color:#B9C2BC;}

  /* ============ 图文交替 ============ */
  .feat-row{
    display:grid;grid-template-columns:1fr 1fr;
    gap:clamp(26px,4vw,60px);
    align-items:center;
    padding:clamp(30px,4vw,52px) 0;
    border-top:1px solid var(--line);
  }
  .feat-row:first-of-type{border-top:0;padding-top:0;}
  .feat-row.reverse .feat-media{order:2;}
  .feat-media{position:relative;}
  .feat-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:var(--r-img);background:var(--soft);
    border:1px solid var(--line);
  }
  .feat-media .tag{
    position:absolute;left:14px;top:14px;
    background:rgba(255,255,255,.94);
    border:1px solid var(--line);
    border-radius:6px;
    padding:4px 10px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--ink);
  }
  .feat-body h3{
    font-size:clamp(19px,2vw,23px);font-weight:700;line-height:1.4;margin-top:14px;
  }
  .feat-body p{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--muted);max-width:44ch;}
  .feat-body .link-arrow{margin-top:20px;}
  .feat-points{margin-top:18px;display:flex;flex-direction:column;gap:9px;}
  .feat-points li{display:flex;gap:10px;font-size:14px;color:var(--ink-soft);line-height:1.7;}
  .feat-points li::before{
    content:"";flex:0 0 auto;
    width:7px;height:7px;margin-top:8px;
    background:var(--orange);border-radius:2px;
  }

  /* ============ 流程时间轴 ============ */
  .steps{position:relative;margin-top:8px;}
  .steps::before{
    content:"";position:absolute;left:19px;top:16px;bottom:16px;
    width:1px;background:var(--line);
  }
  .steps li{
    position:relative;
    display:grid;grid-template-columns:78px 1fr;gap:12px;
    padding:18px 0;
  }
  .step-no{
    font-family:var(--font-num);font-variant-numeric:tabular-nums;
    font-size:clamp(28px,3vw,40px);font-weight:700;line-height:1;
    color:var(--ink);letter-spacing:-.02em;
    background:var(--bg);padding-right:6px;
    position:relative;z-index:1;
  }
  .section-soft .step-no{background:var(--soft);}
  .steps h4{font-size:17px;font-weight:600;line-height:1.5;}
  .steps p{margin-top:7px;font-size:14.5px;line-height:1.8;color:var(--muted);max-width:52ch;}

  /* ============ 规格清单 ============ */
  .spec-grid{
    display:grid;grid-template-columns:1fr 1fr;
    gap:clamp(22px,4vw,56px);
    margin-top:6px;
  }
  .spec-row{
    display:grid;grid-template-columns:130px 1fr;gap:16px;
    align-items:baseline;
    padding:15px 0;
    border-bottom:1px solid var(--line);
  }
  .spec-k{font-size:13px;color:var(--muted);text-align:right;letter-spacing:.02em;}
  .spec-v{
    font-family:var(--font-num);font-variant-numeric:tabular-nums;
    font-size:15px;color:var(--ink);font-weight:600;line-height:1.6;
  }
  .spec-v .note{font-family:var(--font-cn);font-weight:400;font-size:13px;color:var(--muted);margin-left:8px;}

  /* ============ 评价墙 ============ */
  .quotes{
    display:grid;grid-template-columns:repeat(3,1fr);
    gap:20px;align-items:start;
  }
  .quote{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:22px;
    transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .quote:hover{
    transform:translateY(-2px);
    border-color:rgba(217,104,46,.45);
    box-shadow:0 18px 40px -24px rgba(22,34,31,.28);
  }
  .quote:nth-child(2){margin-top:26px;}
  .quote:nth-child(3){margin-top:12px;}
  .quote-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
  .avatar{
    width:32px;height:32px;border-radius:50%;
    background:var(--soft);color:var(--ink);
    display:grid;place-items:center;font-size:13px;font-weight:700;
  }
  .quote-name{font-size:13px;font-weight:600;color:var(--ink);}
  .quote-role{font-size:12px;color:var(--muted);}
  .quote p{font-size:14.5px;line-height:1.8;color:var(--ink-soft);}
  .score{display:flex;gap:4px;margin-top:14px;}
  .score span{width:9px;height:9px;border-radius:2px;background:var(--orange);}
  .score span.off{background:var(--line);}

  /* ============ FAQ ============ */
  .faq-list{margin-top:4px;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:18px;
    padding:22px 0;text-align:left;
    font-size:17px;font-weight:600;line-height:1.55;color:var(--ink);
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--orange);}
  .faq-q .plus{
    flex:0 0 auto;font-size:18px;color:var(--muted);
    transition:transform .3s var(--ease),color .3s var(--ease);
  }
  .faq-item.open .faq-q .plus{transform:rotate(45deg);color:var(--orange);}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .faq-a p{
    padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--muted);max-width:70ch;
  }
  .faq-item.open .faq-a{max-height:340px;}

  /* ============ CTA ============ */
  .cta-band{
    background:var(--soft);
    border-radius:var(--r-block);
    padding:clamp(30px,5vw,64px);
    display:grid;grid-template-columns:1.3fr 1fr;
    gap:clamp(24px,4vw,48px);align-items:center;
  }
  .cta-band h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
  .cta-meta{
    margin-top:16px;display:flex;flex-wrap:wrap;gap:8px 20px;
    font-size:13px;color:var(--muted);letter-spacing:.03em;
  }
  .cta-meta .num{font-weight:600;color:var(--ink-soft);}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink);color:var(--ft-text);border-top:1px solid #223029;padding:clamp(48px,6vw,76px) 0 26px;margin-top:clamp(56px,7vw,96px);}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:clamp(24px,3.4vw,48px);}
  .footer-logo{
    display:inline-flex;align-items:center;gap:10px;
    font-size:16px;font-weight:700;color:#F2EFE8;letter-spacing:.02em;
  }
  .footer-logo .logo-mark{width:32px;height:32px;border-radius:8px;background:#F2EFE8;color:var(--ink);font-size:13px;}
  .footer-tag{margin-top:16px;font-size:13.5px;line-height:1.85;color:#9BA69F;max-width:34ch;}
  .footer-ver{margin-top:14px;font-size:12px;color:#7E8A84;font-family:var(--font-num);letter-spacing:.03em;}
  .footer-col h4{font-size:12px;font-weight:600;letter-spacing:.12em;color:#8E9A94;margin-bottom:14px;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col a,.footer-col span{font-size:13px;color:var(--ft-text);transition:color .2s var(--ease);line-height:1.6;}
  .footer-col a:hover{color:#fff;}
  .footer-bottom{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
    margin-top:clamp(34px,5vw,52px);padding-top:20px;
    border-top:1px solid #26332C;
    font-size:12px;color:#7E8A84;letter-spacing:.03em;
  }
  .footer-bottom span:last-child{font-family:var(--font-num);}

  /* ============ 入场动效 ============ */
  .reveal{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
  .reveal.in{opacity:1;transform:none;}

  /* ============ 响应式 ============ */
  @media (max-width:1279px){
    .quotes{grid-template-columns:repeat(3,1fr);gap:16px;}
  }
  @media (max-width:1023px){
    .shell-nav{display:none;}
    .shell-main{padding-left:0;padding-top:56px;}
    .mobile-bar{display:flex;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .hero-media{order:-1;}
    .hero-media::after{inset:10px -10px -10px 10px;}
    .hero-media img{aspect-ratio:16/10;}
    .hero-sub{max-width:none;}
    .feat-row{grid-template-columns:1fr;gap:24px;padding:32px 0;}
    .feat-row.reverse .feat-media{order:0;}
    .feat-body p{max-width:none;}
    .spec-grid{grid-template-columns:1fr;gap:0;}
    .spec-row{grid-template-columns:112px 1fr;}
    .quotes{grid-template-columns:1fr;gap:14px;}
    .quote:nth-child(2),.quote:nth-child(3){margin-top:0;}
    .cta-band{grid-template-columns:1fr;}
    .cta-actions{justify-content:flex-start;}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:639px){
    body{font-size:15.5px;}
    .crumb{padding-top:22px;}
    .hero{padding-top:22px;}
    .hero-actions .btn{flex:1 1 100%;}
    .hero-stats{grid-template-columns:1fr 1fr;gap:16px 12px;}
    .hero-media::after{display:none;}
    .steps li{grid-template-columns:56px 1fr;gap:10px;}
    .steps::before{left:15px;}
    .spec-row{grid-template-columns:1fr;gap:4px;padding:14px 0;}
    .spec-k{text-align:left;}
    .faq-q{font-size:16px;padding:18px 0;}
    .cta-actions .btn{flex:1 1 100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.001ms !important;animation-duration:.001ms !important;}
    .reveal{opacity:1;transform:none;}
  }

/* roulang page: category4 */
:root{
  --ink:#16221F;
  --clay:#D9682E;
  --clay-dark:#C25A26;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --soft:#EFEBE3;
  --line:#E3DED4;
  --muted:#5C635F;
  --foot-text:#C9C4B8;
  --ok:#3F7A5E;
  --warn:#B4552E;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-block:24px;
  --shell:96px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-hover:0 18px 40px -24px rgba(22,34,31,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease)}
img{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid rgba(217,104,46,.55);outline-offset:2px}
::selection{background:rgba(217,104,46,.22)}

div.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}

/* ===== 左侧导航 ===== */
.shell-nav{
  position:fixed;
  top:0;left:0;
  width:var(--shell);
  height:100vh;
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:26px 0 20px;
  z-index:50;
}
.shell-logo{display:flex;flex-direction:column;align-items:center;gap:9px}
.logo-mark{
  width:36px;height:36px;border-radius:9px;
  background:var(--ink);color:#fff;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;letter-spacing:0;
  flex:0 0 auto;
}
.logo-text{font-size:11px;line-height:1.3;text-align:center;font-weight:600;letter-spacing:.04em;color:var(--ink)}
.shell-links{margin-top:36px;display:flex;flex-direction:column;gap:16px;flex:1}
.shell-link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  width:76px;padding:7px 2px;
  font-size:10px;line-height:1.4;color:var(--muted);text-align:center;
  transition:color .2s var(--ease);
}
.shell-link i{font-size:17px}
.shell-link:hover{color:var(--ink)}
.shell-link.active{color:var(--ink);font-weight:600}
.shell-link.active::before{
  content:"";position:absolute;left:-10px;top:6px;bottom:6px;
  width:2px;border-radius:2px;background:var(--clay);
}
.shell-foot{
  display:flex;align-items:center;gap:5px;
  font-size:10px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok)}

/* ===== 移动端顶栏与抽屉 ===== */
.mobile-bar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:var(--surface);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;
  padding:0 16px;z-index:60;
}
.mobile-logo{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700;letter-spacing:.02em}
.mobile-logo .logo-mark{width:28px;height:28px;border-radius:7px;font-size:13px}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:8px;color:var(--ink);
  font-size:18px;transition:background-color .2s var(--ease);
}
.burger:hover{background:var(--soft)}
.drawer{position:fixed;inset:0;z-index:90;visibility:hidden;pointer-events:none}
.drawer.open{visibility:visible;pointer-events:auto}
.drawer-mask{
  position:absolute;inset:0;background:rgba(22,34,31,.42);
  opacity:0;transition:opacity .32s var(--ease);
}
.drawer.open .drawer-mask{opacity:1}
.drawer-panel{
  position:absolute;top:0;left:0;bottom:0;width:78%;max-width:320px;
  background:var(--bg);
  transform:translateX(-100%);
  transition:transform .32s var(--ease);
  display:flex;flex-direction:column;
  padding:22px 18px 24px;
}
.drawer.open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-title{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;border-radius:8px;color:var(--muted)}
.drawer-close:hover{background:var(--soft);color:var(--ink)}
.drawer-links{display:flex;flex-direction:column}
.drawer-link{
  display:flex;align-items:center;gap:12px;
  height:52px;padding:0 12px;border-radius:9px;
  font-size:14px;color:var(--ink);
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.drawer-link i{width:18px;text-align:center;font-size:15px;color:var(--muted)}
.drawer-link:hover{background:var(--soft)}
.drawer-link.active{color:var(--clay);font-weight:600}
.drawer-link.active i{color:var(--clay)}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}

/* ===== 页面框架 ===== */
.page{padding-left:var(--shell);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:34px 0 0;font-size:13px;color:var(--muted);
}
.breadcrumb a:hover{color:var(--clay)}
.breadcrumb .sep{color:#B7B1A6}
.breadcrumb .current{color:var(--muted)}

/* ===== Hero ===== */
.hero{padding:34px 0 56px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:6px;
  background:rgba(217,104,46,.09);color:var(--clay);
  font-size:12px;font-weight:600;letter-spacing:.12em;
}
.hero-title{
  margin:20px 0 16px;
  font-size:clamp(34px,4.2vw,52px);
  font-weight:700;line-height:1.12;letter-spacing:-.02em;
}
.hero-title .l2{display:block;color:var(--muted)}
.hero-sub{font-size:17px;line-height:1.8;color:var(--muted);max-width:540px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px 22px;
  margin-top:26px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta i{color:var(--clay);font-size:11px}
.hero-media{position:relative}
.hero-media img{
  position:relative;z-index:1;width:100%;
  border-radius:var(--r-img);
  aspect-ratio:4/3;object-fit:cover;
}
.hero-media::after{
  content:"";position:absolute;inset:0;z-index:0;
  border:1px solid var(--clay);border-radius:var(--r-img);
  transform:translate(12px,12px);
}

/* ===== 通用板块 ===== */
.section{padding:72px 0}
.section.tight{padding:56px 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:32px;flex-wrap:wrap;
}
.section-title{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.section-desc{margin-top:10px;font-size:15px;line-height:1.8;color:var(--muted);max-width:640px}
.badge{
  display:inline-flex;align-items:center;
  padding:5px 10px;border-radius:6px;
  background:rgba(217,104,46,.09);color:var(--clay);
  font-size:12px;font-weight:600;letter-spacing:.1em;
  white-space:nowrap;
}
.badge.ink{background:var(--soft);color:var(--ink)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:background-color .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:scale(.985)}
.btn-primary{background:var(--clay);color:#fff}
.btn-primary:hover{background:var(--clay-dark);transform:translateY(-1px)}
.btn-primary:focus-visible{outline:2px solid rgba(217,104,46,.5);outline-offset:2px}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid rgba(22,34,31,.3)}
.btn-ghost:hover{background:var(--soft);border-color:var(--ink)}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;
  font-size:14px;font-weight:600;color:var(--ink);
  padding-bottom:2px;border-bottom:1px solid var(--line);
}
.link-arrow:hover{color:var(--clay);border-color:var(--clay)}
.link-arrow i{font-size:12px;transition:transform .2s var(--ease)}
.link-arrow:hover i{transform:translateX(2px)}

/* ===== 搜索区 ===== */
.search-block{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px 32px 28px;
}
.search-wrap{position:relative;max-width:620px}
.search-wrap i{
  position:absolute;left:18px;top:50%;transform:translateY(-50%);
  color:var(--muted);font-size:15px;pointer-events:none;
}
.search-input{
  width:100%;height:52px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--bg);color:var(--ink);
  padding:0 18px 0 46px;font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.search-input::placeholder{color:#9A9F9B}
.search-input:focus{
  outline:none;background:var(--surface);
  border-color:var(--ink);
  box-shadow:0 0 0 3px rgba(217,104,46,.16);
}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 15px;
  border:1px solid var(--line);border-radius:6px;
  background:var(--surface);color:var(--muted);
  font-size:13px;font-weight:600;letter-spacing:.02em;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.chip:hover{border-color:rgba(22,34,31,.38);color:var(--ink)}
.chip.active{background:var(--soft);border-color:transparent;color:var(--ink)}
.search-empty{
  display:none;margin-top:20px;
  padding:18px 20px;border:1px dashed var(--line);border-radius:var(--r-btn);
  font-size:14px;color:var(--muted);max-width:620px;
}

/* ===== FAQ ===== */
.faq-group{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;padding:22px 0;text-align:left;
  font-size:17px;font-weight:600;line-height:1.55;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--clay)}
.faq-ico{
  position:relative;width:16px;height:16px;flex:0 0 16px;
  transition:transform .32s var(--ease),color .32s var(--ease);
  color:var(--muted);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:currentColor;border-radius:1px;
}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px;transition:opacity .2s var(--ease)}
.faq-item.open .faq-ico{transform:rotate(45deg);color:var(--clay)}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .32s var(--ease);
}
.faq-a > div{overflow:hidden}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a p{
  padding:0 0 24px;max-width:740px;
  font-size:15px;line-height:1.85;color:var(--muted);
}

/* ===== 自助排查三步 ===== */
.steps{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.step{padding:34px 32px 34px 0;border-right:1px solid var(--line)}
.step:last-child{border-right:0;padding-right:0}
.step-no{
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--clay);
  font-variant-numeric:tabular-nums;
}
.step h3{margin-top:14px;font-size:19px;font-weight:600;line-height:1.4}
.step p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--muted);max-width:300px}

/* ===== 排行 ===== */
.rank-list{border-top:1px solid var(--line)}
.rank-item{
  display:grid;grid-template-columns:70px minmax(0,1fr) auto;
  align-items:center;gap:22px;
  padding:22px 6px;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding .2s var(--ease);
}
.rank-item:hover{background:rgba(255,255,255,.65);padding-left:14px;padding-right:14px}
.rank-no{
  font-size:24px;font-weight:700;color:var(--clay);
  font-variant-numeric:tabular-nums;line-height:1;
}
.rank-body h3{font-size:17px;font-weight:600;line-height:1.5}
.rank-body p{margin-top:4px;font-size:14px;color:var(--muted);line-height:1.7}
.rank-item i{color:var(--muted);font-size:13px;transition:transform .2s var(--ease),color .2s var(--ease)}
.rank-item:hover i{transform:translateX(3px);color:var(--clay)}

/* ===== 兜底 CTA ===== */
.fallback{
  background:var(--soft);border-radius:var(--r-block);
  padding:56px;display:flex;align-items:center;justify-content:space-between;
  gap:40px;flex-wrap:wrap;
}
.fallback h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3}
.fallback p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted);max-width:620px}
.fallback-links{display:flex;flex-wrap:wrap;align-items:center;gap:22px}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink);color:var(--foot-text);
  padding:64px 0 0;border-top:1px solid rgba(255,255,255,.08);
  margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:40px;padding-bottom:48px;
}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-size:16px;font-weight:700;letter-spacing:.01em;
}
.footer-logo .logo-mark{background:var(--clay);width:32px;height:32px;border-radius:8px;font-size:14px}
.footer-tag{margin-top:16px;font-size:13px;line-height:1.8;color:var(--foot-text);max-width:300px}
.footer-ver{margin-top:14px;font-size:12px;color:#8E958F;font-variant-numeric:tabular-nums}
.footer-col h4{
  font-size:12px;font-weight:600;letter-spacing:.12em;
  color:#8E958F;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;font-size:13px}
.footer-col a{color:var(--foot-text)}
.footer-col a:hover{color:#fff}
.footer-col span{color:var(--foot-text);font-variant-numeric:tabular-nums}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12px;color:#8E958F;flex-wrap:wrap;
}

/* ===== 动效 ===== */
.anim .reveal{opacity:0;transform:translateY(10px)}
.anim .reveal.in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease)}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .anim .reveal{opacity:1;transform:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  div.container{padding:0 32px}
  .hero-grid{gap:40px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:36px}
}
@media (max-width:1023px){
  .shell-nav{display:none}
  .mobile-bar{display:flex}
  .page{padding-left:0;padding-top:56px}
  .hero{padding:26px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:-1}
  .hero-media img{aspect-ratio:16/10}
  .hero-media::after{transform:translate(10px,10px)}
  .section{padding:56px 0}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:28px 0}
  .step:last-child{border-bottom:0}
  .step p{max-width:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .fallback{padding:40px}
}
@media (max-width:767px){
  div.container{padding:0 20px}
  .breadcrumb{padding-top:24px;font-size:12px}
  .hero-title{font-size:clamp(28px,7vw,38px)}
  .hero-sub{font-size:16px}
  .search-block{padding:24px 20px 22px}
  .faq-q{font-size:16px;padding:20px 0;gap:14px}
  .rank-item{grid-template-columns:52px minmax(0,1fr) auto;gap:14px;padding:18px 2px}
  .rank-no{font-size:20px}
  .rank-body h3{font-size:16px}
  .section-head{margin-bottom:24px}
  .fallback{padding:30px 24px;border-radius:18px}
  .fallback-links{gap:16px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px}
  .site-footer{padding-top:48px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:519px){
  .btn{width:100%;padding:0 20px}
  .fallback-links{width:100%}
  .link-arrow{border-bottom:0}
}